CN201322015Y - Push cylinder type on-off four-way change-over valve - Google Patents

Abstract

The utility model discloses a novel on-off four-way change-over valve, which comprises three main valve bodies, a connecting piece, two shafts, four valve plates and a pneumatic driving device, and further comprises four short tubes and a flange, which are communicated with the valve bodies, wherein the main valve body of the change-over valve is composed of an upper valve body, a middle valve body and a lower valve body, which are connected by the flange. A drive cylinder can simultaneously control to open and close the two shafts and the valve plates through the connecting piece for realizing the purpose of direction change. The valve has reasonable and compact structure, not only can meet the requirement of direction change, and has excellent sealing performance and long service life.

Description

Cylinder pushing type two position and four-way reversing valves

Technical field

The utility model relates to the mechanism that metallurgy industry is used for the gas commutation, particularly provides a kind of small-bore two position and four-way reversing valves.

Background technique

Present two position and four-way reversing valves have used in equipment such as metallurgy industry recuperative heater, and especially in the hot dirty gas medium, valve is short normal service time, and maintenance time is many.Two position and four-way reversing valves that in the past used in the rough gas medium belong to rotary-type, and sealing effect is bad, and most service time, the seal ring damage just appearred in length.Contamination precipitation in the coal gas also can further destroy sealing configuration.

Original rotary-type two position and four-way reversing valve operating principles are:

Rotary-type two position and four-way reversing valves are to be flipped an angle by a rocking arm drive main spindle rotation drive valve plate that has oscillating cylinder, on valve plate or the valve seat rubber seal is housed, when valve plate oblique upper motion and when compressing to the left, as shown in Figure 1, the A chamber communicates with the B chamber, and the C chamber communicates with the D chamber, when valve plate oblique upper motion and when compressing to the right, the A chamber communicates with the C chamber, and the B chamber communicates with the D chamber. and the cylinder to-and-fro motion also just drives about valve plate and overturns, and reaches the effect of commutation.

The model utility content

The purpose of this utility model has been to overcome the defective of existing two position and four-way reversing valves, provides that a kind of volume is little, cylinder pushing type two position and four-way reversing valves of good sealing effect, long service life.

To achieve these goals, the technical solution adopted in the utility model is:

A kind of cylinder pushing type two position and four-way reversing valves, it includes cylinder, valve body, and wherein: this valve body comprises first valve body, second valve body and the 3rd valve body, and this first valve body, second valve body and the 3rd valve body are fixedlyed connected by flange;

Be provided with the dividing plate in two chambeies about second valve body is divided in this second valve body, the both sides of this dividing plate upper end are respectively arranged with first valve seat and second valve seat, the both sides of this dividing plate lower end are respectively arranged with the 3rd valve seat and the 4th valve seat, this first valve seat and the 3rd valve seat are positioned at a side of dividing plate, and this second valve seat and the 4th valve seat are positioned at the opposite side of dividing plate;

The main shaft of this cylinder is connected with link, and the two ends of this link are fixed with first valve rod and second valve rod respectively, and this first valve rod wears first valve seat and the 3rd valve seat, and this second valve rod wears second valve seat and the 4th valve seat;

Be fixed with first valve plate and the 3rd valve plate on this first valve rod, be fixed with second valve plate and the 4th valve plate on this second valve rod, distance between this first valve plate and the 3rd valve plate is less than the length of dividing plate, and the distance between this second valve plate and the 4th valve plate is greater than the length of dividing plate.

Description of drawings

Fig. 1 is known technology two position and four-way reversing valve structural representations;

Fig. 2 is the utility model embodiment cylinder pushing type two position and four-way reversing valve structural representations.

Embodiment

As Fig. 1, described cylinder pushing type two position and four-way reversing valves of model utility embodiment; It includes cylinder 10, valve body, and wherein: this valve body comprises first valve body 3, second valve body 6 and the 3rd valve body 8, and this first valve body 3, second valve body 6 are fixedlyed connected by flange with the 3rd valve body 8;

Be provided with the dividing plate 5 in two chambeies about second valve body 6 is divided in this second valve body 6, the both sides of these dividing plate 5 upper ends are respectively arranged with first valve seat 13 and second valve seat 4, the both sides of these dividing plate 5 lower ends are respectively arranged with the 3rd valve seat 16 and the 4th valve seat 7, this first valve seat 13 and the 3rd valve seat 16 are positioned at a side of dividing plate 5, and this second valve seat 4 and the 4th valve seat 7 are positioned at the opposite side of dividing plate 5;

The main shaft of this cylinder 10 is connected with link 11, and the two ends of this link 11 are fixed with first valve rod 12 and second valve rod 2 respectively, and this first valve rod 12 wears first valve seat 13 and the 3rd valve seat 16, and this second valve rod 2 wears second valve seat 4 and the 4th valve seat 7;

Be fixed with first valve plate 14 and the 3rd valve plate 15 on this first valve rod 12, be fixed with second valve plate 1 and the 4th valve plate 9 on this second valve rod 2, distance between this first valve plate 14 and the 3rd valve plate 15 is less than the length of dividing plate 5, and the distance between this second valve plate 1 and the 4th valve plate 9 is greater than the length of dividing plate 5.

When cylinder 10 main shafts drive first valve rod 12 and second valve rod 2 and move downward, second valve plate 1 and second valve seat, 4 closures, the 3rd valve plate 15 and the 3rd valve seat 16 closures simultaneously, at this moment, the A chamber is communicated with the C chamber, and the B chamber is communicated with the D chamber; When cylinder 10 main shafts drive first valve rod 12 and second valve rod 2 and move upward, the 4th valve plate 9 and the 4th valve seat 7 closures, first valve plate 14 and first valve seat, 13 closures simultaneously, the A chamber is communicated with the B chamber at this moment, and the C chamber is communicated with the D chamber.

The secondary inserted polystyrene of taper that adopts of two position and four-way reversing valve valve seals.

When solenoid valve repeatedly electric, dead electricity, then valve left and right sides valve plate moves up and down respectively, thereby realizes the commutation purpose of air inlet-exhaust.

The above only is preferred embodiment of the present utility model; be not to limit to the utility model with this; therefore; all all and the utility model structure, device, feature etc. are approximate, identical; be allly to replace and modify etc. according to the utility model patent claim being equal to of doing, all should still belong within the scope of patent application protection of the present utility model.

Claims (1)

1, a kind of cylinder pushing type two position and four-way reversing valves, it includes cylinder, valve body, it is characterized in that: this valve body comprises first valve body, second valve body and the 3rd valve body, and this first valve body, second valve body and the 3rd valve body are fixedlyed connected by flange;

Be provided with the dividing plate in two chambeies about second valve body is divided in this second valve body, the both sides of this dividing plate upper end are respectively arranged with first valve seat and second valve seat, the both sides of this dividing plate lower end are respectively arranged with the 3rd valve seat and the 4th valve seat, this first valve seat and the 3rd valve seat are positioned at a side of dividing plate, and this second valve seat and the 4th valve seat are positioned at the opposite side of dividing plate;

The main shaft of this cylinder is connected with link, and the two ends of this link are fixed with first valve rod and second valve rod respectively, and this first valve rod wears first valve seat and the 3rd valve seat, and this second valve rod wears second valve seat and the 4th valve seat;

Be fixed with first valve plate and the 3rd valve plate on this first valve rod, be fixed with second valve plate and the 4th valve plate on this second valve rod, distance between this first valve plate and the 3rd valve plate is less than the length of dividing plate, and the distance between this second valve plate and the 4th valve plate is greater than the length of dividing plate.

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