CN201396449Y

CN201396449Y - Labyrinth seal butterfly valve

Info

Publication number: CN201396449Y
Application number: CN200820180105XU
Authority: CN
Inventors: 陈秀林
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2010-02-03
Anticipated expiration: 2018-11-27

Abstract

The utility model discloses a labyrinth seal butterfly valve, which comprises a butterfly valve body (12), a butterfly valve plate left half edge (1), a butterfly valve plate right half edge (2), a connection screw (3), a right semi-circular labyrinth convex ring (4), a right semi-circular labyrinth concave ring (5), a connection screw (6), a fixed connection block (7), a left semi-circular labyrinth concave ring (8), a left semi-circular labyrinth convex ring (9), a taper pin (10) and a valve shaft (11). The left and the right semi-circular labyrinth concave rings and the left and the right semi-circular labyrinth convex rings are installed on a valve body and a valve plate to form a labyrinth seal structure. The butterfly valve has good seal effect, simple structure, low production costand high application temperature, and is particularly applicable to the large-diaeter seal butterfly with lower seal requirement.

Description

The labyrinth sealing butterfly valve

[technical field]

The utility model relates to a kind of corollary equipment on the industrial pipeline that is applied to, be particularly suitable for using on the heavy caliber low pressure pipeline.The labyrinth sealing butterfly valve belongs to medium shut-off means on coal gas in the industrial pipeline, air, dirt gas, the fume pipe, belongs to valve field.

[background technique]

The structure of seal butterfly valve has hard seal butterfly valve (see figure 1), soft sealing butterfly valve (see figure 2), flat seal butterfly valve (see figure 4) basically at present, its basic structure includes valve body, valve seal seat, valve plate, seal ring, valve shaft, pin and key and forms, seal butterfly valve generally adopts off-centre (two off-centre or three off-centre) structure, seal butterfly valve is provided with seal valve seat on valve body, on valve plate, be provided with seal ring, the valve plate displacement that eccentric shaft by valve produces when rotated reaches changes tight more more, reaches sealing purpose.The valve body of seal butterfly valve and valve plate need eccentric fine finishing, to requirement on machining accuracy than higher, in use can not be out of shape, therefore very high to the requirement of mechanical strength of valve body and valve plate, when valve body and valve plate are subjected to the distortion of intensity and the influence of expanding with heat and contract with cold of serviceability temperature, seal butterfly valve sealing and operational safety have directly been influenced.Therefore the processing technology complexity of valve, be subjected to the restriction of medium serviceability temperature, Heavy Weight and cause the high defective of manufacture cost.Ventilation butterfly valve (see figure 3) is owing to need to consider to expand with heat and contract with cold must make between valve body and the valve plate to leave the gap, so defective such as leakage rate is bigger.

[model utility content]

In view of the machining accuracy height that has valve in the background technique, processing technology complexity, Heavy Weight, use are subjected to medium temperature restriction and cause can not using under high-temperature condition and the manufacture cost height, and ventilation butterfly valve leakage rate is bigger.The technical problem that the utility model will solve provides that a kind of scientific structure, processing technology are simple, processing request, cost are low, the labyrinth sealing butterfly valve that can at high temperature use.

In order to solve the problems of the technologies described above, the utility model takes following technological scheme to realize: the labyrinth sealing butterfly valve, comprise butterfly valve body, butterfly valve plate, labyrinth ring seal arrangement, valve shaft, described labyrinth-type excluder is that the protruding circle in right semi-circle labyrinth is installed in the right one side of something of butterfly valve plate by attachment screw; The recessed circle in right semi-circle labyrinth is fixed on fixedly connected by attachment screw, and fixedly connected then is welded on the corresponding side of butterfly valve body; It is half of that the protruding circle in left semicircle labyrinth is installed in a butterfly valve plate left side by attachment screw; The recessed circle in left semicircle labyrinth is fixed on fixedly connected by attachment screw, and fixedly connected then is welded on the corresponding side of butterfly valve body; A described butterfly valve butterfly plate left side right one side of something half of and butterfly valve is real to be a butterfly valve butterfly plate, and butterfly valve plate is connected valve shaft by taper pin; Drive unit power is delivered on the valve shaft, and valve shaft revolves in the 0-90 ° of scope by taper pin drive butterfly valve plate and rotates.When being in 90 ° (during unlatchings as shown in figure 11) at the butterfly valve butterfly plate, concavo-convex labyrinth circle separately, this moment, valve was in the unlatching circulation status, when be in 0 ° (when closing as shown in figure 10) at the butterfly valve butterfly plate, concavo-convex labyrinth circle is sewed up, and valve was in and closed sealing state this moment, plays the medium effect of cutting off.

The labyrinth sealing butterfly valve adopts ventilation butterfly valve structure principle, on the basis of ventilation butterfly valve, increase labyrinth ring, block the gap between valve plate and the valve body, reach sealing effect, it is simple that it has manufacturing process, starting torque is little, low cost of manufacture, the concavo-convex degree of depth of labyrinth collar is deep, the a small amount of distortion that valve is expanded with heat and contract with cold by temperature is not very big to the influence that seals, therefore not high to the requirement of mechanical strength of valve body and valve plate, thus reduce the manufacture cost of valve and separate advantages such as having changed processing request.

[description of drawings]

Further describe each relevant details of the present utility model below more in conjunction with the accompanying drawings.

Fig. 1 is three eccentric hard seal butterfly valve structural drawing in the background technique;

Fig. 2 is three eccentric soft sealing butterfly valve structural drawing in the background technique;

Fig. 3 is ventilation butterfly valve structure figure in the background technique;

Fig. 4 is background technique three rod seal butterfly valve structure figure;

Fig. 5 is the right elevation of Fig. 4;

Fig. 6 is labyrinth sealing butterfly valve structure figure of the present utility model;

Fig. 7 is the left view of Fig. 6;

Fig. 8 is the plan view of Fig. 6;

Fig. 9 is the partial enlarged drawing of I in Fig. 7 mark;

Figure 10 is a labyrinth sealing butterfly valve closed position schematic representation of the present utility model

Figure 11 is a labyrinth sealing butterfly valve of the present utility model enable possition schematic representation

[embodiment]

Being applied on the gas pipeline with this labyrinth sealing butterfly valve as Fig. 6 to Figure 11 present embodiment is mode of execution, and this labyrinth sealing butterfly valve comprises butterfly valve body 12, butterfly valve plate left side one side of something 1, the right one side of something 2 of butterfly valve plate, valve shaft 11; Be weldingly fixed on fixedly connected 7 on described fan's butterfly valve body 12, the recessed circle 8 in left semicircle labyrinth and the recessed circle 5 in right semi-circle labyrinth are installed in by attachment screw 6 fixedlys connected pieces 7; The protruding circle 9 in described left semicircle labyrinth is installed on the butterfly valve butterfly plate left side half of 1 by attachment screw 3; The protruding circle 4 in described right semi-circle labyrinth is installed on the butterfly valve butterfly plate right half of 2 by attachment screw 3; A described butterfly valve plate left side half of 1 and butterfly valve plate are right half of) real be one, by taper pin 10 be connected valve shaft 11 and be connected.Described labyrinth sealing butterfly valve is that drive unit power is delivered on the valve shaft 11, and valve shaft 11 revolves in the 0-90 ° of scope by taper pin 10 drive butterfly valve plates and rotates.When be in 90 ° (during unlatchings as shown in figure 11) at the butterfly valve butterfly plate, concavo-convex labyrinth circle separately, this moment, valve was in the unlatching circulation status, when be in 0 ° (when closing as shown in figure 10) at the butterfly valve butterfly plate, concavo-convex labyrinth circle is sewed up, valve was in and closed sealing state this moment, when medium by the time be subjected to the multilayer resistance of labyrinth circle to play seal action, play and cut off the medium purpose.

Certainly, the left and right sides, above-mentioned labyrinth semi-ring can also adopt whole labyrinth ring to use on butterfly valve in the utility model, can also adopt the concavo-convex labyrinth bar that is combined into of vertical element to use on push-pull valve simultaneously, all belongs to protection domain of the present utility model.

The labyrinth sealing butterfly valve adopts the ventilation butterfly valve structure in the utility model, therefore processes fairly simplely, and the concavo-convex degree of depth of labyrinth collar is deep, and the variable effect that valve is expanded with heat and contract with cold by temperature is little, and is therefore not high to the requirement of mechanical strength of valve body and valve plate.

Claims

1: a kind of labyrinth sealing butterfly valve, comprise butterfly valve body (12), butterfly valve plate, valve shaft (11), it is characterized in that butterfly valve plate is made up of a butterfly valve plate left side half of (1), butterfly valve plate right half of (2), the labyrinth ring seal arrangement is installed on butterfly valve plate, and described labyrinth ring device is made up of the protruding circle in right semi-circle labyrinth (4), the recessed circle in right semi-circle labyrinth (5), the protruding circle in left semicircle labyrinth, the recessed circle in left semicircle labyrinth (8); The protruding circle in right semi-circle labyrinth (4) is installed in butterfly valve plate right half of (2) by attachment screw (3); The recessed circle in right semi-circle labyrinth (5) is fixed on fixedly connected (7) and fixedly connected (7) by attachment screw (6) and is welded on the corresponding side of butterfly valve body (12); The protruding circle in left semicircle labyrinth (9) is installed in a butterfly valve plate left side half of (1) by attachment screw (3); The recessed circle in left semicircle labyrinth (8) is fixed on fixedly connected (7) and fixedly connected (7) by attachment screw (6) and is welded on the corresponding side of butterfly valve body (12); A butterfly valve plate left side half of (1), butterfly valve plate right half of (2) are connected on the valve shaft (11) by taper pin (10).