CN85201056U

CN85201056U - Bistable electromagnetic valve

Info

Publication number: CN85201056U
Application number: CN 85201056
Authority: CN
Inventors: 朱日昭
Original assignee: Nanjing University
Current assignee: Nanjing University
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1986-02-26

Abstract

The utility model discloses an energy-saving electromagnetic valve for controlling, comprising a valve seat (5), a valve core body (4), a coil (1), locking devices (2), (3), (6), (7) which are installed on the valve seat and the valve core body, etc. The energy-saving electromagnetic valve for controlling is characterized in that devices which are can be locked are installed on two reserved positions, and a valve gate is electrified in altering the working condition. After the commutation is completed, a control current is cut off, and the effect of power saving and the effect that the size of the coil is reduced are achieved.

Description

Bistable electromagnetic valve

The present invention is a solenoid valve of controlling usefulness automatically.

Two solenoid valves of the prior art are by control coil (1), spool (4), valve seat formations such as (5).Two working staties are arranged: do not add control open coil during electric current, not adhesive of armature, valve closing or in the A working state, add control electric current after coil (1) conducting, armature be spool (4) by adhesive, valve open or in the B working state keeps tens of watts approximately of power this moment.State when controlling electric current as not having is considered as stable state, and this valve can be described as the monostable valve.The shortcoming of this type of valve is that the B working state must have electric current to keep, thereby energy consumption is big.

Task of the present invention is to make the new solenoid valve of a class, and this class solenoid valve all is a self-stabilization in all working positions, only just switches on when conversion to change original state to enter specified position, and after converting, the control electric current cuts off immediately.Obviously, neither power consumption of non-conversion time.

Technical solution of the present invention is:

1. the locking framework of spool is set in each use position.

A) mode of permanent magnet adhesive: permanent magnet (3), (6) are installed in the appropriate location at the spool housing (4) of nonmagnetic substance processing, and install in the relevant position of valve seat have permanent magnet that opposite polarity points to or ferromagnetic metal material (2), (5), thereby set up the stable condition of each specified position.

B) mode of mechanical positioning: go up the installation ejector pin or bump pearl (7) at valve seat (5), and process locating slot, thereby set up the stable condition of each specified position in the relevant position of spool (4).

2. when adopting hvdc control mode, change spool (4) direction of action and finish by current direction in the change coil.Be converted to the B working state as desire from the A working state, current direction is a → b in the coil, and when then changing from the B working state to the A working state, current direction will be b → a in the coil.And when adopt exchanging control mode, then adopt two-wire look structure, change working state with the mode of control coil gating.

3. in the mechanism that adopts hvdc control mode, spool can adopt the method for inlaying permanent magnet.

The ON time of control electric current is generally 0.2～2 second by the shift time decision of spool.The conducting of electric current is handled by control mechanism.

Implementation result of the present invention, compared with prior art: not power consumption fully during steady state, significantly energy-conservation.Also have,, save copper cash, reduce the physical dimension of valve because the transient flow mistake that the control electric current only changes at state can get the working method that strengthens operating current, thereby coil turn can reduce greatly.

Fig. 1 is a DC control, permanent magnet adhesive locking stop valve structure figure.

Fig. 2 is for exchanging the selector valve structural drawing of control, the locking of mechanical pins formula.

Solution of the present invention in conjunction with the accompanying drawings, further specifies as follows with two embodiments:

Embodiment 1 is one and uses hvdc control mode work, the stop valve of permanent magnet adhesive locking.With reference to accompanying drawing 1, go up the thin-wall stainless steel guide pin bushing that the fixing seal flowing medium is used at steel valve seat (5), valve core (4) can be free to slide (the resistance when discharging for reducing spool upper space fluid in guide pin bushing, the gap of spool and guide pin bushing can be big slightly), two end device permanent magnets (3) of spool (4), (6), ((3) hold concurrently locking and drive double action) and be welded with iron top (2) at the guide pin bushing top.Its working procedure is as follows: when spool (4) during at shown position, because permanent magnet (6) is fastened attraction (and pressure of the high-pressure liquid) valve port of valve seat (5), (rubber seal on the spool is hold concurrently sealing and buffering usefulness, for a change original working state, when promptly needing valve open, the direct current (d.c.) that passes to certain orientation in the coil (1) is (as a → b), at this moment, the magnetic field that produces in the coil produces enough attraction forces to the permanent magnet (3) that is loaded in the spool (4), when this attraction force surpasses hydrodynamic pressure, the latching force of permanent magnet (6), spool gravity, and spool is during to the frictional force of guide pin bushing, spool just moves upward, the import and export conducting of valve.Obviously, owing to the adhesive of permanent magnet (3) to top (2), spool has entered another steady state, and at this moment, the control electric current just can be removed.

When passing to b → a to electric current in the coil (1), just produce opposite process.

Embodiment 2 is with the selector valve of Ac control with the work of ejector pin lock mode.With reference to accompanying drawing 2, spool (4) is made by soft iron or nonferromagnetic material, and two armature that soft iron processes are inserted at its two ends, outside it, across guide pin bushing, be wound with coil 1a and 1b, they are controlled guiding valve respectively and move to the left or to the right, on valve seat (5), ejector pin (7) is housed, because the elastic force of ejector pin inner spring, ejector pin can stretch into spool (4) and get on the bus in the vee gutter of making, the through hole at spool middle part and side inclined hole are to use for valve body two end spaceses form path.Its working procedure is as follows: in current location, be spool on left position, desire changes working state, promptly becomes B, C conducting from A, C conducting, coil 1b energising, because produce magnetic field in the 1b, the right-hand member soft iron is magnetized, thereby produce pulling force to the right, ejector pin (7) is positioned at the lateral force of the last right side of spool (4) triangular groove and pushes up back, whole spool moves right, thus A, C blocking-up, B, the conducting of C mouth.At this moment, ejector pin (7) is exactly aimed at another triangular groove of spool, is pushed out because of the spring force effect is top, thereby has locked the position of spool and valve body, and at this moment, the control electric current can cut off.Rightabout process is as long as pass to immediate current in coil 1a.

Obviously, with reference to embodiment 1 structure, this selector valve is easy to change into the mode of DC control or permanent magnet locking.

Claims

1, bistable electromagnetic valve is a machinery action device of controlling usefulness automatically, can be used for the break-make control of flowing material, it has valve seat＜5 〉, valve core＜4, control coil＜1 etc. for main constituent elements, feature of the present invention is: in valve seat＜5〉and valve core＜4 between be installed in two predetermined devices that state can lock.

2, according to the described solenoid valve of claim 1, it is characterized in that: the locking in each precalculated position adopts the permanent magnet (3), (6) that are installed on the valve core (4) to wait and be installed in the ferromagnetic substance that is fixed on the valve body or the mode of adhesives such as permanent magnet (2), (5).

3, according to the described solenoid valve of claim 1, it is characterized in that: the mode of mechanical caging is adopted in each precalculated position, as is installed in the top lock (7) on the valve seat (5) or bumps pearl and the locating slot pinning location of processing on spool (4).

4, according to the described solenoid valve of claim 1, it is characterized in that: when the control of action is finished with direct current,, pass to the electric current of different direction in the coil for the different movement directions of valve body.

5, according to the described solenoid valve of claim 1, it is characterized in that: when the control of action was finished with Ac, commutation realized with the gating of two absolute coils.

6, according to claim 1,4 described solenoid valves, the shell that spool adopts nonferromagnetic material to make, the structure of inlaying permanent magnet in it.