CN102102547A - Protective device for piston rod of oscillating valve matched actuating mechanism - Google Patents
Protective device for piston rod of oscillating valve matched actuating mechanism Download PDFInfo
- Publication number
- CN102102547A CN102102547A CN2011100316547A CN201110031654A CN102102547A CN 102102547 A CN102102547 A CN 102102547A CN 2011100316547 A CN2011100316547 A CN 2011100316547A CN 201110031654 A CN201110031654 A CN 201110031654A CN 102102547 A CN102102547 A CN 102102547A
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- China
- Prior art keywords
- piston rod
- guide rail
- joint
- protective gear
- swing valve
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Abstract
The invention discloses a protective device for a piston rod of an oscillating valve matched actuating mechanism. The protective device comprises a track fixing support; a cylindrical guide rail is arranged on the track fixing support; the guide rail is fixedly connected with the track fixing support; a joint is arranged in the guide rail and is in sliding fit with the inner circumferential surface of the guide rail; and when the protective device for the piston rod of the oscillating valve matched actuating mechanism is used, one end of the joint is hinged with a strut, and the other end of the joint is fixedly connected with the piston rod of the actuating mechanism, so that when the piston rod moves up and down, the strut can be driven by the joint to move to open and close the valve. The piston rod using the protective device makes linear motion in the guide rail, and force vertical to the piston rod is transferred to the guide rail by the joint, so that the guide rail can effectively support the joint; therefore, the piston rod can be prevented from being bent and deformed due to stress, the piston rod is prevented from being bitten and stuck, and the valve can be smoothly opened and closed.
Description
Technical field
The present invention relates to the supporting actuator of steam turbine valve, the protective gear of the supporting actuator of particularly a kind of swing valve piston rod.
Background technique
Hydraulic actuator (oil engine) is the power unit of Steam Turhine Adjustment security system, also is the power unit of various industrial control valves, and its major function is to change by hydraulic pressure to realize its piston action of control, and then the aperture of control (steam turbine) valve.Steam turbine valve roughly is divided into two kinds of swing and direct-acting types, in swing valve, two kinds of arrangements is arranged, and a kind of be that vertical unit direction is arranged, another kind is horizontal unit direction layout.The linkage structure of valve and actuator as shown in Figure 1 in the dual mode, valve 11 is hinged with the middle part of connecting rod 13, one end of connecting rod 13 and a fixed support 12 are hinged, and an end of the other end of connecting rod 13 and pole 14 is hinged, and the piston rod 15 of the other end of pole 14 and execution architecture 16 is hinged.This mechanism according to lever principle, drives opening or closing of valve 11 by moving up and down of piston rod 15 when work.
In order to guarantee good seal, leave very little free gap between actuator piston rod 15 and the actuator 16, like this situation that when piston rod 15 work, just inevitably can occur bending and deformation.Although piston rod 15 is caused damage for fear of bending is excessive, between piston rod 15 and connecting rod 13, added pole 14, but some actuator is in order to guarantee to satisfy the stroke of valve 11, guarantee whole design simultaneously, long situation can appear in piston rod 15. when piston rod 15 when upwards the poppet aperture reaches the position of connecting rod 13 levels, this moment, piston rod became a spiral arm beam structure, pole is two articulating point A up and down, B can not guarantee on the straight line of piston rod 15 operations, at this moment will apply a bigger horizontal thrust to piston rod 15, piston rod 15 is in off-straight moving direction maximum angle place, so just is easy to cause the bending of piston rod.And when horizontal arranging mode, though can farthest guarantee the straight line motion of piston rod 15, but owing to adopted horizontal arrangement, pole 14 and piston rod 15 have dropped on the piston rod 15 in the strength of gravitational direction upper support, at this moment when piston rod 15 poppets 11 on a horizontal plane greatly, on gravitational direction, form a spiral arm beam, also can cause the bending of piston rod 15, cause actuator's bite, valve can not be closed smoothly.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention provides a kind of simple in structure and can prevent the piston rod protection device of piston rod bending.
For solving the problems of the technologies described above, the present invention adopts following technological scheme:
The protective gear of the supporting actuator of a kind of swing valve piston rod; it comprises a track fixed support; described track fixed support is provided with a guide rail cylindraceous; described guide rail is fixedlyed connected with described track fixed support; be provided with a joint in the described guide rail, the inner peripheral surface of described joint and described guide rail is slidingly matched.
Preferably, described guide rail is a large diameter steel pipe.
Preferably, the lower end of described joint forms a cylindrical bump portion, and the outer circumferential face of described cylindrical bump portion and the inner peripheral surface of described guide rail are slidingly matched.
Preferably, the outer circumferential face of described cylindrical bump portion is provided with slip ring.
Preferably, described cylindrical bump portion is provided with several pollutant exhaust holes along described guide rail axial direction.
Preferably, the upper surface of described cylindrical bump portion is provided with annular dump tank, and described annular dump tank is communicated with described pollutant exhaust hole.
Preferably, be provided with the support floor between described guide rail and the described guide fixing bracket.
Technique scheme has following beneficial effect: the protective gear of this supporting actuator of swing valve piston rod in use; at first the track fixed support is connected with the valve base of valve; end and pole with joint is hinged then; the other end of joint is fixedlyed connected with actuator piston rod; when piston rod moves up and down, just can drive pole moving like this, and then realize opening and closing of valve by joint.Use the piston rod of this protective gear in guide rail, to do straight line motion; power perpendicular to piston rod will be delivered on the guide rail by joint; but the guide rail butt joint forms effective support; so just can prevent that piston rod is because of stressed bending deflection; prevent that bite, stuck problem from appearring in piston rod, guarantee that valve opens and closes smoothly.
Description of drawings
Fig. 1 is the structural representation that actuator is connected with valve.
Fig. 2 is the plan view of the embodiment of the invention.
Fig. 3 is the sectional view of Fig. 2.
Fig. 4 is the structural representation that the embodiment of the invention is connected with valve, actuator.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail.
Shown in Fig. 2,3; the protective gear of this supporting actuator of swing valve piston rod comprises a track fixed support 21; track fixed support 21 is provided with a guide rail 22 cylindraceous; this guide rail 22 is processed by a large diameter steel pipe; guide rail 22 internal surfaces should be done high-precision grinding process; to guarantee the degree of finish of guide rail 22 internal surfaces, guide rail 22 height should be slightly larger than the range of piston rod 15.Guide rail 22 is welded on the track fixed support 21 along the piston rod movement direction, and the welding of guide rail 22 for convenience can be processed an arc groove in track fixed support 21 central positions, guide rail 22 is placed in this arc groove welds.Be provided with simultaneously 3 pairs of deep floors 24 between track fixed support 21 and guide rail 22, strong floor 24 can form large-area encirclement to guide rail 22, makes guide rail 22 stressed more even, can be because of the stressed excessive local damage that occurs.
Be provided with a joint 23 in the guide rail 22, the lower end of joint 23 forms a cylindrical bump portion 25, form the gap between cylindrical bump portion 25 and guide rail 22 inner peripheral surfaces, process an annular groove at the outer circumferential face of cylindrical bump portion 25, be embedded in slip ring 28 at annular groove, the inner peripheral surface of the outer circumferential face of cylindrical bump portion 25 and guide rail 22 is slidingly matched, slip ring 28 can reduce its force of sliding friction, slip ring 28 should adopt material high temperature resistant and wear-resistant and that hardness is little, can not produce rigid damage to the internal surface of guide rail 22 like this.Joint 23 should guarantee to have certain altitude, to make things convenient for itself and being connected of pole and connecting rod.Be provided with several pollutant exhaust holes 26 along guide rail 22 axial directions in cylindrical bump portion 25, the upper surface of cylindrical bump portion 25 is provided with annular dump tank 27, and annular dump tank 27 is communicated with pollutant exhaust hole.Pollutant exhaust hole 26 and dump tank 27 are set are convenient to the cleaning of guide rail inside, can guarantee inner good ventilation again, avoid producing localized hyperthermia.Joint 23 lower ends form cylindrical bump portion 25, can guarantee the conduction that relative equally distributed power is arranged between joint 23 and the guide rail 22.
As shown in Figure 4; the protective gear of this supporting actuator of swing valve piston rod in use; at first track fixed support 21 is connected with the valve base 17 of valve; also actuator 16 can be connected as one with valve base 17 by this track fixed support 21 like this; track fixed support 21 also is connected with guide rail 22 simultaneously; therefore it is a main stressed member, should guarantee its sound construction.After track fixed support 21 and valve base 17 connected, an end and the pole 14 of joint 23 is hinged, and the other end of joint 23 was fixedlyed connected with the piston rod 15 of actuator 16, will guarantee the concentricity of guide rail 22 and piston rod 15 simultaneously.When piston rod 15 moves up and down, just can drive pole 14 like this and move, and then realize opening and closing of valve 11 by 13 swings of pole 14 drivening rods by joint 23.
Use piston rod 15 linear type in guide rail 22 of this protective gear to move up and down; the power (perpendicular to piston rod) that pole 14 passes to piston rod 15 substantially horizontals will be delivered on the guide rail 22 by joint 23; but guide rail 22 butt joints 23 form effective support; so just can prevent that piston rod 15 is because of stressed bending deflection; thereby prevent that bite, stuck problem from appearring in piston rod 15, guarantee that valve opens and closes smoothly.
More than the protective gear of the supporting actuator of the swing valve piston rod that the embodiment of the invention provided is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; all can change to some extent in specific embodiments and applications; therefore this description only is used in the embodiment of the invention is described; should not be construed as limitation of the present invention, all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (7)
1. the protective gear of the supporting actuator of a swing valve piston rod; it is characterized in that: it comprises a track fixed support; described track fixed support is provided with a guide rail cylindraceous; described guide rail is fixedlyed connected with described track fixed support; be provided with a joint in the described guide rail, the inner peripheral surface of described joint and described guide rail is slidingly matched.
2. the protective gear of the supporting actuator of swing valve according to claim 1 piston rod, it is characterized in that: described guide rail is a large diameter steel pipe.
3. the protective gear of the supporting actuator of swing valve according to claim 1 piston rod, it is characterized in that: the lower end of described joint forms a cylindrical bump portion, and the outer circumferential face of described cylindrical bump portion and the inner peripheral surface of described guide rail are slidingly matched.
4. the protective gear of the supporting actuator of swing valve according to claim 3 piston rod is characterized in that: the outer circumferential face of described cylindrical bump portion is provided with slip ring.
5. the protective gear of the supporting actuator of swing valve according to claim 3 piston rod is characterized in that: described cylindrical bump portion is provided with several pollutant exhaust holes along described guide rail axial direction.
6. the protective gear of the supporting actuator of swing valve according to claim 5 piston rod is characterized in that: the upper surface of described cylindrical bump portion is provided with annular dump tank, and described annular dump tank is communicated with described pollutant exhaust hole.
7. the protective gear of the supporting actuator of swing valve according to claim 1 piston rod is characterized in that: be provided with the support floor between described guide rail and the described guide fixing bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100316547A CN102102547A (en) | 2011-01-28 | 2011-01-28 | Protective device for piston rod of oscillating valve matched actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100316547A CN102102547A (en) | 2011-01-28 | 2011-01-28 | Protective device for piston rod of oscillating valve matched actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102102547A true CN102102547A (en) | 2011-06-22 |
Family
ID=44155579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100316547A Pending CN102102547A (en) | 2011-01-28 | 2011-01-28 | Protective device for piston rod of oscillating valve matched actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102102547A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257014A (en) * | 2013-04-03 | 2013-08-21 | 上海健洲机械设备有限公司 | Piston mechanism with breakdown protection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59155508A (en) * | 1983-02-23 | 1984-09-04 | Yamatake Honeywell Co Ltd | Control valve for steam recovery |
| US4766932A (en) * | 1987-05-14 | 1988-08-30 | Westinghouse Electric Corp. | Steam control valve |
| CN101520095A (en) * | 2009-03-26 | 2009-09-02 | 杭州汽轮机股份有限公司 | Bell type adjusting steam valve |
| CN201443419U (en) * | 2009-07-31 | 2010-04-28 | 辽宁电力控制技术有限公司 | Fixed form of servomotor in electrohydraulic control system |
| CN201715006U (en) * | 2010-06-30 | 2011-01-19 | 徐明敏 | Opening-closing valve |
-
2011
- 2011-01-28 CN CN2011100316547A patent/CN102102547A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59155508A (en) * | 1983-02-23 | 1984-09-04 | Yamatake Honeywell Co Ltd | Control valve for steam recovery |
| US4766932A (en) * | 1987-05-14 | 1988-08-30 | Westinghouse Electric Corp. | Steam control valve |
| CN101520095A (en) * | 2009-03-26 | 2009-09-02 | 杭州汽轮机股份有限公司 | Bell type adjusting steam valve |
| CN201443419U (en) * | 2009-07-31 | 2010-04-28 | 辽宁电力控制技术有限公司 | Fixed form of servomotor in electrohydraulic control system |
| CN201715006U (en) * | 2010-06-30 | 2011-01-19 | 徐明敏 | Opening-closing valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257014A (en) * | 2013-04-03 | 2013-08-21 | 上海健洲机械设备有限公司 | Piston mechanism with breakdown protection device |
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Application publication date: 20110622 |