CN2775428Y

CN2775428Y - Electric change valve

Info

Publication number: CN2775428Y
Application number: CN 200420104669
Authority: CN
Inventors: 张海红; 韩小珍; 刘贵珊; 何建国; 詹志彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-21
Filing date: 2004-12-21
Publication date: 2006-04-26
Anticipated expiration: 2014-12-21

Abstract

The utility model relates to a reversing valve in a gas conveying system, particularly to an electric reversing valve. The utility model is characterized in that two valve flaps (2) are arranged on both ends of a valve core rod (12) through a universal joint (3); both ends of a valve rod (4) are fixedly connected with the middle part of the valve core rod (12) and a valve main shaft (8); a speed reducing motor (M) is arranged outside a valve body (7); one end of the valve main shaft (8) extends out of the valve body (7) and is fixedly connected with an elastic poking piece (5); a poking rod (6) for poking the elastic poking piece (5) is arranged on an output shaft (9) of the speed reducing motor (M); two travel switches (XK1) and (XK2) are arranged outside the valve body (7); the travel switches (XK1) and (XK2) are respectively connected in a positive rotation control circuit and a reverse rotation control circuit of the speed reducing motor (M) in series. The whole electric reversing valve has the advantages of simple structure and small impact force during reversing, and is suitable for various airflow control systems.

Description

Electronic selector valve

Technical field

The utility model relates to the selector valve in the gas delivery system, especially electronic selector valve.

Background technique

Selector valve is the primary component of gas circuit direction control in the gas delivery system, is widely used in industries such as chemical industry, grain, food, agricultural, can realize turning to of air-flow changed the road effect.The selector valve that extensively adopts has types such as Electromagnetic Control, electronic control, pneumatic control at present, and wherein pneumatic control valve not only costs an arm and a leg, but also needs affiliated facility such as pressurized air etc.Solenoid directional control valve is widely used, it mainly is to produce thrust during by electromagnet energising adhesive to promote spool and move and control fluid reversing, reset by spring force, but solenoid directional control valve is subjected to the restriction of electromagnetic push, its thrust is little, instantaneous impact is big, electromagnetic interference is strong, and solenoid directional control valve resets by spring force, because the existence of frictional force, the reliability that resets is restricted, and particularly is difficult to realize control for large bore valves.The principle of motor-operated control valve is to be driven the screw rod rotation and spool is moved by reducing motor, realize the switch of valve by the clockwise and anticlockwise of motor, though can realize the control of heavy caliber air-flow, but valve passes through to bit switch when opening or closing fully disconnects motor power, because spool contacts with valve port and belongs to hard contact substantially, so the installation precision to location switch is had relatively high expectations, cause valve closing tight or burn motor easily, and the costing an arm and a leg of such valve.

Summary of the invention

For addressing the above problem, the utility model proposes a kind of simple in structurely, impact force is little during switching, to the less demanding electronic selector valve of installation precision.

The technical solution of the utility model is:

A kind of electronic selector valve, comprise the inner valve body of cavity that is, on valve body, be respectively equipped with first passage, second channel, and third channel, its specialization is, in valve body, be provided with the valve main shaft, valve core rod, valve rod, with two flaps, wherein two flaps are installed in the valve core rod two ends by universal joint respectively, thereby the two ends of valve rod respectively with the middle part of valve core rod fixedly connected with the valve main shaft make flap can be under the valve main shaft drives bidirectional swinging with sealing second channel or third channel, one reducing motor is installed outside valve body, one end of valve main shaft stretches out outside the valve body and with an elastic plectrum fixedlys connected, one driving lever that can stir this elastic plectrum is installed on the reducing motor output shaft, two position limit switches that can move when elastic plectrum is rocked to diverse location are installed outside valve body, and these two position limit switches just are being connected on reducing motor respectively, in the counter-rotating control loop.

Wherein second channel and third channel be on same medial axis, and this medial axis is vertical with the medial axis of first passage.

Wherein elastic plectrum is that thickness is the tinsel of 0.5-1.5mm.

Further, wherein elastic plectrum is that thickness is the stainless steel sheets of 0.8mm.

Wherein two flaps are equipped with rubber gasket with the contacted side of passage separately.

In the utility model, adopt universal joint to be connected between flap and the valve core rod, can realize the automatic adjustment of three-dimensional, guaranteed sealing effect, commutation accurately, can reduce simultaneously the processing and the installation requirement of valve, and the moment that reducing motor produces reaches the valve main shaft indirectly by elastic plectrum, hardening is operating as flexible operation, and impact and vibrations in the time of can reducing commutation prolong the valve body life-span, especially when minor variations takes place in the position limit switch position, can not influence the proper functioning of valve, this electronic selector valve is simple in structure, and impact force is little during commutation, is applicable to various jet systems.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is a plan view of the present utility model;

Accompanying drawing 3 is circuit theory diagrams of the present utility model.

Embodiment

Come the utility model is described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1, the utility model comprises the inner valve body 7 of cavity that is, on valve body 7, be respectively equipped with first passage 1, second channel 10 and third channel 11, wherein second channel 10 and third channel 11 be on same medial axis, and this medial axis is vertical with the medial axis of first passage 1, selects first passage 1 to be suction port usually, second channel 10 and third channel 11 are the air outlet, use as typical threeway scavenging air valve, also can seal second channel 10 or third channel 11, become common valve.

As shown in Figure 2, in valve body 7, be provided with valve main shaft 8, valve core rod 12, valve rod 4 and two flaps 2, wherein two flaps 2 are installed in valve core rod 12 two ends by a universal joint 3 separately, so that 11 mouthfuls of flap 2 and 10 mouthfuls of second channels or third channels keep plane contact when contacting automatically, simultaneously on two flaps 2, be equipped with rubber gasket with the contacted side of passage separately, thereby reach good sealing effect.

As shown in Figure 2, fixedly connected with valve main shaft 8 with the middle part of valve core rod 12 respectively in the two ends of valve rod 4, when valve main shaft 8 is rotated counterclockwise, driving flap 2 by valve rod 4, valve core rod 12 and universal joint 3 upwards swings so that the flap of top seals second channel 10, when otherwise valve main shaft 8 turns clockwise, following flap sealing third channel 11.

As shown in Figure 1, one reducing motor M is installed outside valve body 7, one end of valve main shaft 8 stretches out outside the valve body 7, its end is fixedlyed connected with an elastic plectrum 5, one driving lever 6 that can stir this elastic plectrum 5 is installed on reducing motor M output shaft 9, be illustrated in figure 1 as a L shaped driving lever 6, two position limit switch XK1 are installed outside valve body 7, XK2, when reducing motor M output shaft 9 just, during counter-rotating, driving lever 6 can be allocated to different predeterminated positions respectively with elastic plectrum 5, two position limit switch XK1, XK2 just is installed in this two predetermined position respectively, when elastic plectrum 5 is allocated to predeterminated position, corresponding position limit switch action, as shown in Figure 3, two position limit switch XK1, XK2 just is being connected on reducing motor M respectively, in the counter-rotating control loop, and be normally closed, therefore when a certain position limit switch moved, corresponding circuit was disconnected, reducing motor M stall.

Elastic plectrum 5 can adopt tinsels such as iron plate or stainless steel sheets, and its thickness is relevant with material, is generally 0.5-1.5mm to get final product, and adopting thickness in the utility model is the stainless steel sheets of 0.8mm.

Reducing motor M should adopt turbine and worm decelerator, and its output shaft 9 of outage back no longer rotates.

Working principle of the present utility model is as follows:

When K switch 3 contacts with a point, reducing motor M just changes, its output shaft 9 drives valve main shaft 8 rotation in the same way by elastic plectrum 5, as shown in Figure 2, flap 2 is at valve rod 4, valve core rod 12, drive down upwards swing with universal joint 3, because resiliently deformable takes place in elastic plectrum 5 when being struck, the moment that produces by its resiliently deformable is rotated valve main shaft 8, when flap 2 contacted with second channel 10, elastic plectrum 5 just touched position limit switch XK1, reducing motor M stall, valve main shaft 8 stops operating, second channel 10 is closed, and the pressure of 2 pairs of second channels 10 of flap this moment depends on the degree of crook of elastic plectrum 5, otherwise, when K switch 3 contacts with the b point, reducing motor M counter-rotating, elastic plectrum 5 are struck to predeterminated position and make position limit switch XK2 action, and then third channel 11 is closed.

In addition, the degree of crook of the position-controllable system elastic plectrum 5 by adjusting two position limit switch XK1, XK2, thereby the pressure of control 2 pairs of second channels 10 of flap or third channel 11, and then control its seal degree.

Claims

1, a kind of electronic selector valve comprises that inside is the valve body of cavity (7), is respectively equipped with first passage (1), second channel (10) and third channel (11) on valve body (7), it is characterized in that:

In valve body (7), be provided with valve main shaft (8), valve core rod (12), valve rod (4) and two flaps (2), wherein two flaps (2) are installed in valve core rod (12) two ends by universal joint (3) respectively, the two ends of valve rod (4) respectively with the middle part of valve core rod (12) with valve main shaft (8) thus fixedly connected and make flap (2) drive down bidirectional swinging to seal second channel (10) or third channel (11) at valve main shaft (8);

One reducing motor (M) is installed outside valve body (7), one end of valve main shaft (8) stretches out outside the valve body (7) and with an elastic plectrum (5) fixedlys connected, on reducing motor (M) output shaft (9), be equipped with one and can stir the driving lever (6) of this elastic plectrum (5), two position limit switches (XK1, XK2) that can move when being rocked to diverse location in elastic plectrum (5) are installed outside valve body (7), and these two position limit switches (XK1, XK2) are connected on respectively in reducing motor (M) the forward and backward control loop.

2, electronic selector valve as claimed in claim 1 is characterized in that:

Wherein second channel (10) and third channel (11) be on same medial axis, and this medial axis is vertical with the medial axis of first passage (1).

3, electronic selector valve as claimed in claim 1 is characterized in that:

Wherein elastic plectrum (5) is that thickness is the tinsel of 0.5-1.5mm.

4, electronic selector valve as claimed in claim 3 is characterized in that:

Wherein elastic plectrum (5) is that thickness is the stainless steel sheets of 0.8mm.

5, as any described electronic selector valve in the claim 1 to 4, it is characterized in that:

Wherein two flaps (2) are equipped with rubber gasket with the contacted side of passage separately.