CN203670323U

CN203670323U - Motor driven reversing valve

Info

Publication number: CN203670323U
Application number: CN201320728985.0U
Authority: CN
Inventors: 曲世杰; 尹建业
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-19
Filing date: 2013-11-19
Publication date: 2014-06-25
Anticipated expiration: 2023-11-19

Abstract

Disclosed is a high-flow motor driven reversing valve. The motor driven reversing valve is composed of a valve body, a valve element, a guide sleeve, a motor, a crank wheel, an angular displacement sensor, a microcontroller, a speed reducer, a sealing ring and an end cover. An annular groove is formed in one end of the valve element in a cutting mode, a crankshaft on the crank wheel is placed in the annular groove of the valve element, the crank wheel and the angular displacement sensor are arranged on an output shaft of the speed reducer at the same time, the angular displacement of the crank wheel is fed back to the microcontroller through the angular displacement sensor, the microcontroller carries out comparison operation on the angle of the crank wheel and a set angle and drives the motor and the speed reducer to rotate, rotary motion is changed into linear motion through the crankshaft of the crank wheel and the annular groove of the valve element, the valve element is driven to horizontally move left and right, and the reversing function of the valve is achieved. The guide sleeve provides locating guide for the valve element, and the sealing ring and the end cover are used for sealing the valve element. Due to the fact that the mode with the main valve element directly driven by the motor reducer is adopted by the reversing valve to replace the mode with the main valve element indirectly driven by a guide head, restraints caused by the guide head are overcome, and the high-flow reversing valve can be manufactured.

Description

Motor drives selector valve

Technical field

The utility model relates to selector valve in a kind of air pressure (hydraulic pressure) transmission system, and this selector valve, under heavy traffic condition, directly drives main valve plug to complete commutation function by motor deceleration machine, has volume little, low in energy consumption and reliability high.

Background technique

At present, traditional solenoid directional control valve is with the aciculiform aperture in moving iron core sealing pilot head, in the time that coil is given electricity, pick up moving iron core and open the aciculiform aperture in pilot head, medium (gas, wet goods, lower same) promote the large piston in commutation valve pocket by aciculiform aperture, utilize large piston to promote commutation valve rod and complete commutation function, undertaken after one-level amplification by pilot head, utilize pressure medium to drive main valve plug to complete commutation function, that is to say that the keying of traditional solenoid directional control valve depends on the pressure of medium; In addition, pilot head carry out one-level amplify can only be used for small flow.

If require larger flow even when super-flow, the one-level of pilot head is amplified and is difficult to realize commutation function, and conventional method has two kinds, and a kind of is exactly the number of stages of amplification that increases pilot head, adopts pilot head to carry out secondary or three grades of amplifications, realizes commutation function; The second increases pilot head and electromagnetic coil exactly.

If fruit utilizes the multistage amplification of pilot head, on the one hand structure of reversing valve complexity, moving element and dynamic pressure number of seals are increased, processing cost rising, the reliability of selector valve are reduced.On the other hand, the aciculiform small aperture of pilot head is very little, easily stops up, and causes defective diverted valve, therefore requires comparatively strict to the cleanliness of medium.

Increase pilot head and electromagnetic coil if fruit utilizes, although can solve the shortcoming of the multistage amplification of pilot head, the increase of electromagnetic coil can make the increase of selector valve volume, power consumption sharply rise, its usage economy variation.

Model utility content

The action that is difficult to realize large flow and commutation in order to overcome traditional solenoid directional control valve depends on the shortcoming of pressure medium, the utility model provides a kind of large flow motor to drive selector valve, and this selector valve is made up of valve body, spool, guide sleeve, servo drive system, crankwheel, displacement transducer, microcontroller, sealing etc.Feedback by angular displacement sensor to microcontroller, forms closed loop servo system, and the rotation of servo-system drive motor, is driven into specified position by retarder, crankwheel mechanism by spool, realizes the commutation function of valve.Directly drive the mode of main valve plug to replace pilot head indirectly to drive main valve plug because this selector valve adopts motor reducer, therefore overcome the restriction bringing due to pilot head, can make the selector valve of larger flow.

The utility model solves the technological scheme that its technical problem adopts: a kind of motor drives selector valve, by valve body, spool, guide sleeve, motor, crankwheel, angular displacement sensor, microcontroller, retarder, seal ring and end cap composition, cut out an annular groove in spool one end, crankshaft on crankwheel is put into the annular groove of spool, crankwheel and angular displacement sensor are arranged on reducer output shaft simultaneously, pass through angular displacement sensor, the angular displacement of crankwheel is fed back to microcontroller, microcontroller is by after the angle comparison operation of the angle of crankwheel and setting, drive motor and retarder rotation, by the crankshaft of crankwheel and the annular groove of spool, to rotatablely move and become straight line motion, instigate the translation of spool left and right, realize the commutation function of valve, guide sleeve provides spool location guide, and seal ring and end cap provide the sealing of spool.

The beneficial effects of the utility model are, can make large diameter directional valve, and test shows to make latus rectum and is greater than 50mm selector valve; Overcome the restriction of traditional solenoid directional control valve incoming pressure, breakout pressure, applicable pressure is wider, even can in the situation that having the requirement of certain vacuum degree, use; Adopt microcontroller, be convenient to expansion and the industrial bus control etc. of interface message processor (IMP) agreement.

Brief description of the drawings

Fig. 1 structure of reversing valve figure (PA is logical, the logical state of BO).

Fig. 2 structure of reversing valve figure (PB is logical, the logical state of AO).

Fig. 3 servo-drive schematic diagram.

The schematic diagram of Fig. 4 crankwheel and spool annular groove.Other parts of valve body are hidden, and in this figure, do not draw, and Fig. 4 a is plan view and the left view of crankwheel and spool annular groove, and Fig. 4 b is the plan view of crankwheel and spool annular groove.

In figure, 1. servo drive system, 1-1. motor, 1-2. retarder, 1-3 angular displacement sensor, 1-4 microcontroller, 1-5 power interface, 1-6 logic control interface, 1-7.RS485 EBI, 2. drive body, 3. crankwheel, 4. screw, 5. guide sleeve, 6. seal ring, 7. spool, 8. valve body, 9. end cap.

Embodiment (taking pneumatic two position-5 way valves as example)

1) Fig. 4 a from Fig. 4 and Fig. 4 b can find out, crankwheel 3 is from θ _aforward θ to _b, by the annular groove on the crankshaft on crankwheel 3 and spool 7, by spool 7 mobile S distance from left to right, complete commutation function; Crankwheel 3 overturns, in like manner.

2) guide sleeve 5 in Fig. 1, provide spool 7 positioning and guidings, seal ring 6 and end cap 9 provide the sealing of spool 7.

3) the angular displacement sensor 1-3 in Fig. 3 and crankwheel 3 are arranged on the output shaft of retarder 1-2 simultaneously, by angular displacement sensor 1-3, rotational angle theta current crankwheel 3 (supposition) are fed back in microcontroller 1-4 and setting value θ _acompare computing, when | θ-θ _a| > ε (ε is very little positive number), microcontroller 1-4 drive motor 1-1 adjusts, and and if only if | θ-θ _a| when≤ε, servo drive system 1 quits work; The rotational angle theta that crankwheel 3 is current and setting value θ _bcomparison operation and adjustment, in like manner.

4) in Fig. 1, servo drive system 1 is that crankwheel 3 is adjusted to θ _aposition, make spool 7 in right side desired location, the P mouth of selector valve is communicated with A mouth, B mouth is communicated with O mouth.

5) in Fig. 2, servo drive system 1 is that crankwheel 3 is adjusted to θ _bposition, make spool 7 in left side desired location, the P mouth of selector valve is communicated with B mouth, A mouth is communicated with O mouth.

Claims

1. a motor drives selector valve, by valve body, spool, guide sleeve, motor, crankwheel, angular displacement sensor, microcontroller, retarder, seal ring and end cap composition, it is characterized in that: cut out an annular groove in spool one end, crankshaft on crankwheel is put into the annular groove of spool, crankwheel and angular displacement sensor are arranged on reducer output shaft simultaneously, pass through angular displacement sensor, the angular displacement of crankwheel is fed back to microcontroller, microcontroller is by after the angle comparison operation of the angle of crankwheel and setting, drive motor and retarder rotation, by the crankshaft of crankwheel and the annular groove of spool, to rotatablely move and become straight line motion, instigate the translation of spool left and right, realize the commutation function of valve, guide sleeve provides spool location guide, and seal ring and end cap provide the sealing of spool.