CN2360687Y - Self-compensating parallel double-flashboard sluice valve - Google Patents

Abstract

The utility model relates to a self-compensating parallel double-sluice board sluice valve, which comprises a valve body, valve plates, a valve rod, and a valve cover. The utility model is characterized in that the two valve plates are movably matched with a connecting frame fixed on the valve rod; the valve plates can rotate in circumference direction in the process of the start and stop of the valve; the sealing surfaces of the valve plates are evenly worn; simultaneously, a spring is arranged between two valve plates so as to automatically compensate the wearing of the sealing surfaces of the valve plates. The utility model enhances the sealing performance of the valve, extends service life, and is very suitable for pipelines of petroleum industry, chemical engineering industry, etc.

Description

The self compensation double disk parallel gate valve

The utility model relates to a kind of gate valve, particularly a kind of double disk parallel gate valve.

Common plate valve sealing surface wear in opening-closing process is bigger, and valve is after using after a while, and sealability will obviously reduce.For this reason, China Patent No. is 95226065.4 plate valve, a kind of plate valve of extruding/shrinking type structure has been proposed, the i.e. flashboard back brace tightening seal that puts in place earlier in the valve closing process, flashboard unclamps the back lifting with sealing seat earlier in the valve opening process, realize not having friction and open and close, reduced the wearing and tearing between flashboard and the sealing seat effectively.But this extruding/shrinking type plate valve, when closing, can't remove the thing of being stained with on the sealing surface, its flashboard and sealing surface of seat contact position are also fixed, so the impurity in the medium easily makes sealing surface wear, and can't be compensated, thereby sealability is descended, and leak, influence valve working life.

The purpose of this utility model can compensate after providing a kind of sealing surface wear automatically, and sealability is reliable, the double disk parallel gate valve of long service life.

The technical solution of the utility model comprises valve body, valve plate, valve rod, valve gap, Sealing and assembling set, and valve rod is connected with two valve plates by link press span.Two valve plates connect movingly with the circular hole that is connected at link press span center, between two valve plates spring are housed, and the edge is provided with axially stop block.

The beneficial effects of the utility model are that valve plate can rotate by circumferencial direction in opening-closing process, make valve plate in opening-closing process, at first contact valve body sealing surface by the minimum place of wear extent all the time, the uniform wear that keeps sealing surface of valve plate, simultaneously compress valve plate and valve seal face seal by spring force, guarantee sealing reliability, prolong valve working life.

Fig. 1 is a structural representation of the present utility model.

Now describe embodiment of the present utility model in conjunction with the accompanying drawings in detail.

Gate valve as shown in Figure 1 comprises valve body 1, valve rod 9, valve plate 5,7, valve gap 17, and valve plate 5,7 is connected with valve rod 9 by link press span 4, and valve gap 17 is fixedlyed connected with nut 11 by bolt 10 with valve body 1.Between valve gap 17 and valve rod 9, Graphite pad 12 is housed, and compresses by hanging bolt 14, pin 13 and nut 16 by Gland 15.

Link press span 4 centers are shaped on a circular hole, are fixedlyed connected with valve rod 9 by nut 18, pin 19 in the upper end.

Valve plate 5,7 is circular, and circumferential edges has a ring-shaped step, and itself and valve body 1 sealing surface contacting side are the plane, and the opposite side center has the hollow cylinder of protrusion respectively.Wherein the outer wall of valve plate 5 hollow cylinders and link press span 4 center holes movingly, the inwall of the outer wall of another piece valve plate 7 hollow cylinders and valve plate 5 hollow cylinders is movingly.A spring 6 is housed in the hollow cylinder at two valve plates, 5,7 centers.

Symmetry is equipped with a pair of positioning plate 3,8 on the link press span 4.Positioning plate 3 is fixed on the link press span 4 of two valve plates, 5,7 lower ends by bolt 2, and positioning plate 8 is fitted on the link press span 4 together with valve rod 9 by nut 18.Two positioning plates 3,8 are U-shaped, and its U-shaped opening side is imbedded on the ring-shaped step of two valve plates, 5,7 circumferential edges during installation, and when the valve closing state and the table top retention gap distance of ring-shaped step.

Claims (2)

1, a kind of self compensation double disk parallel gate valve, comprise valve body, valve plate, valve rod, valve gap, Sealing and assembling set, valve rod is connected with two valve plates by link press span, it is characterized in that described valve plate (5,7) connects movingly with the circular hole that is connected at link press span (4) center; Between two valve plates (5,7), spring (6) is housed; Valve plate (5,7) is provided with axially stop block.

2, self compensation double disk parallel gate valve according to claim 1 is characterized in that described axially stop block is made of the positioning plate (3,8) that is fixed on the link press span (4).

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