A kind of positive displacement valve opening position dictatorTechnical field
The present invention relates to fluid control devices technical field, specifically a kind of positive displacement valve opening position dictator.
Background technology
Valve is widely used in the connection of the gas path pipe, waterway pipe and oil line pipe of various equipment frocks, and existingThe locating and machining of equipment frock requires accuracy more and more higher, therefore the switch angle to valve controls the requirement it is also proposed that higher.At present, the valve opening that market is present has the instruction of flow-type aperture, pressure switch or the limit switch box of switch instruction, works as valveDoor need for a long time or indefinite duration bubble in water when, now limit switch box can not be used, and condensed water can be damaged, onlyIt can be indicated or pressure switch using flow-type aperture, flow-type switch indicates that there are slight leakage, poor repeatability in inside.PressureSwitch can only illustrate the pressure for having reached that valve is closed, and valve can not be represented completely and completely closed, can not more show valveAperture.
Therefore, in the prior art, limit switch can not be used, flow-type switch indicates poor repeatability and pressure switchInaccurate the problems such as, a kind of positive displacement valve opening position dictator is designed, is the current technical issues that need to address.
The content of the invention
Goal of the invention：For the defect and deficiency of prior art, solution exist limit switch can not use, flow-type switchIndicate poor repeatability and pressure switch it is inaccurate the problems such as, applicant improves by repeatedly practice, devises a kind of positive displacementValve opening position dictator.
Technical scheme：It is main the invention provides a kind of positive displacement valve opening position dictator in order to realize foregoing invention purposeTo include Master cylinder body and interior fittings, the Master cylinder body includes hexagon socket head cap screw, needle valve, compound gasket, sealing flange, self-closingJoint, O-ring, piston, Yx sealing rings, piston rod, seal closure, terminal box, stuffing-box, proximity switch, limit assembly, sliding block,Pointer segment, angular encoder, travelling gear and support.
The Master cylinder body surface is related to the axisymmetric hexagon socket head cap screw of level, and the needle valve is located at the axis of Master cylinder bodyOn line, there is compound gasket at the connection end of needle valve and Master cylinder body, the sidewall edge of Master cylinder body has sealing flange, described self-closingJoint, which is located above the upper left corner of Master cylinder body, the self-closing joint, O-ring, and the piston is located inside Master cylinder body, the YxSealing ring is located at the two ends of piston, there is piston rod where the axis of the Master cylinder body on straight line, and the seal closure is located at master cylinderThere is terminal box at the top of the narrower one end of body, the narrower one end of the Master cylinder body, there is a circular filler one end of the terminal boxLetter, the port limited location component of the narrower one end of the Master cylinder body, the port bottom of the narrower one end of the Master cylinder body has closeSwitch, the structure with proximity switch intersecting vertical is sliding block, and there are pointer segment, the angular coding in one end of the piston rodDevice is located at the top of piston rod, and the travelling gear and support are respectively positioned on piston rod close to one end of pointer segment.
The number of the hexagon socket head cap screw is at least two groups, and the sealing flange edge scribbles expanded rubber, described self-closingThe number of joint is at least a pair, and the Yx sealing rings are even-even, and the terminal box is cavity-like rectangular parallelepiped structure, the cunningThe number of block is even number
The ferrule fitting is installed in series on a pipeline of operation element, and piston is parked in into opening needle valve, electromagnetismReversal valve energized action, drains the air in system；Needle valve is closed, when magnetic valve obtains electric pipe A oil-feeds, promotes positive displacement to openDegree indicator inner carrier is moved to the left, and piston, which is moved to the left, promotes the oil in the oil pocket of the positive displacement indicator of opening left side to enter workElement, the piston of operation element is moved right, and the piston rod movement in positive displacement indicator of opening, band nutating gear is rotated,Pinion rotation drives the axle of angular encoder to rotate, and angular encoder output signal feeds back the angle of valve, and switch indicating piece is movedWhen moving close proximity to switch, the position of the switch of valve, the switch position of limit assembly control valve are fed back in proximity switch actionPut, sliding block adjustment proximity switch position, it is ensured that the feedback of valve location is accurate；When magnetic valve obtains electric pipe B oil-feeds, work memberPiston in part is moved to the left, and piston, which releases the oil of left side intracavitary, to be entered in positive displacement indicator of opening, and positive displacement aperture refers toShow that device inner carrier moves right, the piston rod movement in positive displacement indicator of opening, band nutating gear is rotated, pinion rotation bandThe axle of dynamic angular encoder is rotated, and angular encoder output signal feeds back the angle of valve, and switch indicating piece moves close to closeWhen switch, the position of the switch of valve is fed back in proximity switch action.
Beneficial effect：Compared with prior art, its advantage is the present invention：
The present invention is held suitable for submerging hydraulic valve in a liquid for a long time or can not install the hydraulic pressure of limit switch boxRow device, provides accurate valve position for it and indicates, install simple, convenience easy to maintenance economizes on resources.
Brief description of the drawings
Fig. 1 is a kind of fundamental diagram of positive displacement valve opening position dictator.
Fig. 2 is a kind of structural representation of positive displacement valve opening position dictator.
In figure：1st, hexagon socket head cap screw；2nd, needle valve；3rd, compound gasket；4th, sealing flange；5th, self-closing joint；6th, O-ring；7th, Master cylinder body；8th, piston；9th, Yx sealing rings；10th, piston rod；11st, seal closure；12nd, terminal box；13rd, stuffing-box；14th, it is close to openClose；15th, limit assembly；16th, sliding block；17th, pointer segment；18th, angular encoder；19th, travelling gear；20th, support.
Embodiment
Below by a most preferred embodiment, the technical program is described in detail, but protection scope of the present inventionIt is not limited to the embodiment.
As shown in Fig. 2 a kind of positive displacement valve opening position dictator, mainly includes Master cylinder body 7 and interior fittings, the master cylinderBody 7 includes hexagon socket head cap screw 1, needle valve 2, compound gasket 3, sealing flange 4, self-closing joint 5, O-ring 6, piston 8, Yx sealingsCircle 9, piston rod 10, seal closure 11, terminal box 12, stuffing-box 13, proximity switch 14, limit assembly 15, sliding block 16, pointer segment17th, angular encoder 18, travelling gear 19 and support 20, the surface of Master cylinder body 7 are related to the axisymmetric interior hexagonal spiral shell of levelBolt 1, the needle valve 2 is located on the axis of Master cylinder body 7, has compound gasket 3 at the connection end of needle valve 2 and Master cylinder body 7,The sidewall edge of Master cylinder body 7 has sealing flange 4, and the self-closing joint 5 is located on the upper left corner of Master cylinder body 7, the self-closing joint 5There is O-ring 6 side, and the piston 8 is located inside Master cylinder body 7, and the Yx sealing rings 9 are located at the two ends of piston 8, the Master cylinder body 7Axis where have piston rod 10 on straight line, the seal closure 11 is located at the narrower one end of Master cylinder body 7, the Master cylinder body 7 compared withThere is terminal box 12 at the top of narrow one end, there is a circular stuffing-box 13 one end of the terminal box 12, and the Master cylinder body 7 is narrowerThe port limited location component 15 of one end, the port bottom of the narrower one end of the Master cylinder body 7 has a proximity switch 14, it is described with it is closeThe structure for switching 14 intersecting verticals is sliding block 16, and there are pointer segment 17, the angular encoder 18 in one end of the piston rod 10In the top of piston rod 10, the travelling gear 19 and support 20 are respectively positioned on piston rod 10 close to one end of pointer segment 17.
The number of the hexagon socket head cap screw 1 is at least two groups, and the edge of sealing flange 4 scribbles expanded rubber, it is described fromThe number for closing joint 5 is at least a pair, and the Yx sealing rings 9 are even-even, and the terminal box 12 is cavity-like rectangular parallelepiped structure,The number of the sliding block 16 is even number
As shown in figure 1, the ferrule fitting is installed in series on a pipeline of operation element, piston is parked in opening pinType valve, solenoid directional control valve energized action drains the air in system；Needle valve is closed, when magnetic valve obtains electric pipe A oil-feeds, is pushed awayDynamic positive displacement indicator of opening inner carrier is moved to the left, and piston is moved to the left in the oil pocket of the promotion positive displacement indicator of opening left sideOil enters operation element, and the piston of operation element moves right, the piston rod movement in positive displacement indicator of opening, drives transmissionPinion rotation, pinion rotation drives the axle of angular encoder to rotate, and angular encoder output signal feeds back the angle of valve, switchWhen indicating piece moves close to proximity switch, the position of the switch of valve is fed back in proximity switch action, limit assembly control valveThe position of the switch, sliding block adjustment proximity switch position；When magnetic valve obtains electric pipe B oil-feeds, piston in operation element is to moving to leftDynamic, piston, which releases the oil of left side intracavitary, to be entered in positive displacement indicator of opening, and positive displacement indicator of opening inner carrier moves rightDynamic, the piston rod movement in positive displacement indicator of opening, band nutating gear is rotated, and pinion rotation drives the axle of angular encoderRotate, angular encoder output signal feeds back the angle of valve, when switch indicating piece moves close to proximity switch, proximity switchAction, feeds back the position of the switch of valve.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the artFor member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also shouldIt is considered as protection scope of the present invention.