CN201069015Y - Shock absorption protection small torsion electric valve - Google Patents

Abstract

A small-torsion electric valve for shock protection consists of an actuator mechanism and a valve main body, wherein, a drive motor, a transmission nut, a transmission screw, a shaft connector, and a valve shaft are transmissively connected with each other in sequence. A position signal feed back device, an analog controller, and a power failure reset device are also arranged in the actuator mechanism, a pilot valve plate and a valve core spring are arranged at the middle of the valve plate, a polypropylene seal ring is arranged on the valve plate, plane thrust ball bearings are additionally arranged on both sides of the transmission nut, and a butterfly spring is arranged in the shaft connector. The valve is free of leakage, can automatically reset when power failure occurs, and has energy saving with low comsuption, and convenient open/close operation, advanced technique and excellent performance.

Description

The mortor operated valve that a kind of shock-absorbing protecting torsion force is little

Technical field:

The utility model relates to the valve in the mechanical engineering, is specifically related to the little mortor operated valve of a kind of shock-absorbing protecting torsion force.

Background technique:

At present domestic and international valve, comprise world-renowned valve manufacturer product, all there is following defective in its modulating valve function: leak, still there is the part medium to pass through behind the valve closing, need close stop valve manually, in case carelessness will cause immeasurable loss to strict equipment or systems such as bromine cooling machines.Simultaneously, most of product does not have the turn-off reset device, only Siemens's valve has the turn-off reset device of oil pump compression reseting spring, during each the unlatching, need to open valve, during power failure by the huge Returnning spring of oil pump compression, oil pump runs out of steam, the spring-back force of Returnning spring is with valve closing, and oil pump very easily damages, and wastes energy.In addition.The structural critical defect of the equal ubiquity of all kinds of valves: 1, integrated type valve plate pressure-bearing is big, according to calculating, the electric two-way valve that bore is DN150 is after closing under the 0.8MPa pressure reduction, valve plate bears the pressure of 1413kg, that is to say, the electric two-way valve of closing a DN150 needs the external force of 1413kg at least, so huge pressure often causes actuator to damage, thereby the making model of valve generally can only be controlled at below the DN150, the required power of bigger model is multiplied, and is the power of closing that the valve of DN200 just needs 2512kg as bore.2, open equalizing orifice on the valve plate to reduce pressure reduction, the required power of valve open is reduced, just adopt this mode as Siemens's valve, but because equalizing orifice directly feeds pipeline and work system, and this system relative equilibrium hole is often very big, not only can't reach the effect of balance valve plate pressure at both sides, also making originally just has the valve leak rate of leakage bigger.

Summary of the invention:

Technical problem to be solved in the utility model is: solve the problem that above-mentioned prior art exists, and a kind of do not have leakage, good damping effect, the little mortor operated valve of open and close shock-absorbing protecting torsion force laborsaving, long service life are provided.

The technical solution adopted in the utility model is: the mortor operated valve that this shock-absorbing protecting torsion force is little; connect to form by actuator and valve body two-part; actuator is mounted on the valve seat at valve body top by the lower support frame plate; the drive motor of actuator is connected with transmission nut by key; transmission nut again with the drive screw screw-thread fit; drive screw connects valve shaft by shaft joint; a position signal feedback means and analog amount controller also are installed in the actuator; the turn-off reset device; the turn-off reset device comprises a ups power and control circuit; the position signal feedback means comprises potentiometer and tooth bar; potentiometer shaft gear and tooth bar engagement; tooth bar is connected with shaft joint synchronously by connecting rod; the turn-off reset device connects the controlling and driving motor; guide's valve plate and valve shaft welding; guide's valve plate and valve plate pass through valve core spring; adpting flange connects; fixed guide cover on the valve plate; the polypropylene base seal ring also is installed on the valve plate; the transmission nut two ends add thrust ball bearing with flat seat, and the butterfly spring is housed in the shaft joint.

Working principle:

Open valve: drive motor is left-handed, change moving downward of drive screw into by transmission nut, drive screw drives valve shaft by shaft joint and moves downward, compression lower valve core spring, form passage slit with last valve plate, steam, media such as water flow out through the gap of valve plate and guide's valve plate, make the pressure reduction of valve plate both sides ease down to minimum, valve plate can easily be opened, when valve shaft continued to move downward, guide's valve plate drove by adpting flange and opens valve plate, and more medium just flows into the valve body left side, make valve form the passage of opening, and valve flow is controlled by regulating the valve plate aperture.

Shuttoff Valve: drive motor dextrorotation, change moving upward of drive screw into by transmission nut, drive screw drives valve shaft by shaft joint and moves upward, also can move upward simultaneously with guide's valve plate of valve shaft welding, compression upper valve core spring forms sealing with last valve plate, and the drive valve plate moves upward, until last valve plate fully with the dividing plate applying, and compresses seal reaches the purpose of complete cutting off seal.

Regulating valve: the left-handed or dextrorotation of drive motor promptly drives valve plate rises or descends, and MEDIA FLOW is crossed valve body, makes the Flow characteristics of valve be linear, reaches the effect of accurate adjusting.

Major technique characteristics of the present utility model:

1, fine adjustment, thoroughly cutting off seal.It is that base material adds seal ring that special material makes through many evidences half a year by polypropylene that the utility model adopts special, can work long hours under the condition of 180 ℃ of high-temperature steams, superheated water medium fully, thoroughly cutting off seal.And all other modulating valve of the whole world all do not have thorough turn-off function, must rely on when needing to turn-off and close the stop valve shutoff that prime is installed, some valve adopts viton seal ring all can't work long hours in the high-temperature steam environment, be known as the hardening that only just became fragile in 48 hours of the highest fluorine rubber of heatproof in the experiment, can't proper functioning.

2, the actuator of band turn-off reset function; the cover turn-off reset device of design has voluntarily been installed by actuator; can automatically reset in the time of can making valve under open mode, lose power supply and control signal; throttle down; guarantee that system can cut off MEDIA FLOW automatically to, protection subordinate equipment under situation about having a power failure.

3, welding type valve body pressure-bearing height is in light weight.It only be 2/3 of traditional cast valve body weight that the utility model adopts the valve body of sheet material, tubing welding production, and has higher pressure-bearing characteristic, and through 7.5 times of hydrostatic tests of working pressure, valve body does not have distortion, leakage.

4, two logical, the shared valve body of electric three-way valve, actuator can realize exchanging at any time.

5, unlatching torsion is minimum, and the equal up and down mounting plane thrust ball bearing of transmission nut is changed into rolling friction by bearing with sliding friction, makes the frictional force in the mechanism be reduced to minimum, adopts special first guide structure again, makes unlatching torsion be reduced to minimum.

6, multiple protective; guarantee reliable; actuator is connected by the shaft joint that the butterfly spring is installed with valve shaft; with respect to shock-dampening methods such as the spring that generally adopts now, rubber; the butterfly spring has better bearing capacity and spring performance; the impact that the pressure surge that the variation of valve switch running medium flow produces produces is passed to valve shaft from valve plate, after the butterfly spring damping by shaft joint, reaches the scope that actuator can bear.Guide's valve plate adopts spring to be connected with valve plate; eliminated the vibrations when valve plate is opened, actuator then adopts the analog amount controller control of 4～20mA, and position limit switch is protected about being equipped with simultaneously; the normal condition lower valve is controlled by the analog amount controller; even switch puts in place, position limit switch can not move yet, in particular cases; as the malfunctioning actuator excess of stroke that causes of analog amount controller; then position limit switch action, the cutting-off valve power supply, the protection valve is not damaged.

Description of drawings:

Fig. 1 is the utility model structural representation

Embodiment:

Referring to Fig. 1, the utility model is connected to form by actuator 1 and valve body 2 two-part, actuator 1 is mounted on the valve seat 4 at valve body top by lower support frame plate 3, the drive motor 5 of actuator 1 is connected with transmission nut 7 by gib headed key 6, transmission nut 7 two ends install thrust ball bearing with flat seat 32 additional, moment of torsion significantly reduces, open easily laborsaving, hand can twist, and conventional art may not twist with hand, can only lean on oil pump to open, transmission nut 7 again with drive screw 8 with T type screw-thread fit, rotatablely moving of drive motor 5 changed into moving up and down of drive screw 8, drive screw connects valve shaft 10 by shaft joint 9, protecting against shock damping butterfly spring 31 is installed in the shaft joint 9, a position signal feedback means and analog amount controller 11 and turn-off reset device 12 also are installed in the actuator 1, turn-off reset device 12 comprises a ups power and control circuit, turn-off reset device 12 connects controlling and driving motor 5, and the position signal feedback means comprises potentiometer 13 and tooth bar 14, position limit switch 15.Valve body 2 comprises valve component, shrouding or lower linking tube 16, upper sealing plate 17, adapter 18, dividing plate 19, pipe connecting flange 20, cylindrical shell 21, valve flange 22 under valve component comprises; Mangetic core assembly comprises valve shaft 10, last guide sleeve 23, goes up valve plate 24, lower valve plate 25, descends guide sleeve 26, valve core spring 27, guide's valve plate 28, connecting sleeve 29, adpting flange 30; Guide's valve plate 28 and valve shaft 10 welding, upper and lower valve plate is fixedly connected by connecting sleeve 29, and guide's valve plate 28 is connected by valve core spring 27, adpting flange 30 with last lower valve plate 24,25, and the polypropylene base seal ring is housed on the valve plate.

Claims (1)

1. mortor operated valve that shock-absorbing protecting torsion force is little; connect to form by actuator and valve body two-part; it is characterized in that in the shaft joint that actuator and valve shaft connect damping butterfly spring being installed, the transmission nut of actuator all is equipped with thrust ball bearing with flat seat in two ends up and down.

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