CN203548927U - Tandem blow-off valve - Google Patents

Abstract

The utility model discloses a tandem blow-off valve. An adapter pipe is arranged at a lower port of a valve body. Two valve clacks are overlapped in an L-shaped double-side inner cavity of a valve body and are connected with a valve stem through a valve clack bushing. The valve stem is fixed to the valve body through a support. A packing seat is assembled at the gap between the support and the valve stem and filled with packing fully, the packing is clamped and sealed by a packing bonnet, the bonnet is connected with the support through pins, eyelet bolts and a bonnet plate and then clamped and fixed by nuts, and thus, a sealing effect is achieved. Besides, a valve stem nut and a cap are assembled on the upper portion of the valve stem, and a hand wheel and a sign board are assembled at the top end of the valve stem and are fixed by a hand wheel nut. The tandem blow-off valve is on or off through the hand wheel, and is convenient to use. As the two overlapped valve clacks together with the valve stem are disposed in the L-shaped double-side inner cavity of the valve body, the tandem blow-off valve is of the double-sealing, double-control and double-valve-clack design, and is simple in structure and long in service life. The double valve clacks of the tandem blow-off valve can be used separately.

Description

Tandem blowdown valve

Technical field

The utility model relates to a kind of fluid pipeline open and close device that dams, and especially has the tandem blowdown valve of double seal, dual control system, Double-clack design.

Background technique

At present, known fluid pipeline valve structure is to be designed by single sealing, single valve clack, single valve bar, owing to installing pipes, open and close more frequent, under the poor condition of hyperbaric environment operating mode, generally shutoff valve line duration is the longest can only use 2 years, will arrange to change, its Performance And Reliability has directly affected safety and the economical operation of equipment, easily causes stop work and production.

Summary of the invention

In order to overcome existing fluid pipeline valve seal poor performance, easy water clock, the technical deficiency that working life is short, the utility model provides a kind of tandem blowdown valve, this tandem blowdown valve not only has double seal, dual control system, Double-clack design, and can use separately.

The purpose of this utility model is to provide a kind of tandem blowdown valve, at valve body end opening, be provided with adapter, overlappingly in the two-sided inner chamber of its valve body L-type respectively insert a set of flap, on flap, utilize disc gland to connect valve rod, valve rod is fixed on valve body with support, support and valve lever clearance adapted Packing seat, above Packing seat, fill up filler, above filler, use Gland press seal, Gland and support utilization pin, swing bolt, cover clamp connection is fixed with nut, play seal action, valve rod top is furnished with Stem Mut, nut, top is furnished with handwheel, utilize hand wheel nut to fix, tandem blowdown valve utilizes handwheel to open, close, reach object easy to use.

The beneficial effects of the utility model are overlapping a set of flap, valve rods of respectively inserting in the two-sided inner chamber of valve body L-type, have double seal, dual control system, Double-clack design, also can use separately, simple in structure, long service life.

Accompanying drawing explanation:

Below in conjunction with accompanying drawing and example, the utility model is further illustrated:

Fig. 1 is the utility model structural drawing

Flap in the drawings, 1, take over, 2, valve body, 3,, 4, disc gland, 5, valve rod, 6, Packing seat, 7, pin, 8, filler, 9, gland cover, 10, swing bolt, 11, bolt and nut, 12, cover clamp, 13, Stem Mut, 14, support, 15, nut, 16, handwheel, 17, product inscriptions, 18, hand wheel nut.

Embodiment:

In Fig. 1, at valve body 2 end openings, be provided with and take over 1, overlappingly in the two-sided inner chamber of L-type valve body 2 respectively insert a set of flap 3, flap 3 utilizes disc gland 4 to connect valve rod 5 above, valve rod 5 utilizes support 14 fixedly on upper valve body 2, Packing seat 6 for gap between valve rod 5 and support 14, Packing seat 6 fills up filler 8 above and utilizes gland cover 9, cover clamp 12 to be pressed abd fixed on support 14 by pin 7 swing bolts 10, bolt and nut 11, play fixing seal effect, valve rod 5 tops are furnished with Stem Mut 13, nut 15, handwheel 16, utilize hand wheel nut 18 fixing.During use, can enable two-sided use simultaneously, also can use separately, there is double seal, dual control system, Double-clack design, a valve two seals, when one end seal leakage, available the other end sealing, carries out blowdown and switches, and sealability is more safe and reliable, strict assembling guarantees that valve opens and closes flexible operation freely, thereby reduce maintenance, greatly improve working life, economic benefit is obvious.

The foregoing is only the preferred embodiment of the present invention; it should be pointed out that for a person skilled in the art, according to invention spirit of the present invention and principle; can also make a lot of modification and improvement, but these modification and improvement all fall into protection scope of the present invention.

Claims (1)

1. a tandem blowdown valve, at valve body end opening, be provided with adapter, overlappingly in the two-sided inner chamber of its valve body L-type respectively insert a set of flap, on flap, utilize disc gland to connect valve rod, valve rod is fixed on valve body with support, and support and valve lever clearance adapted Packing seat, fill up filler above Packing seat, above filler, use Gland press seal, Gland is connected with nut and is fixed with support utilization pin, swing bolt, cover clamp.

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