CN202327249U - Novel butterfly micro-resistance slow closing check valve - Google Patents

Abstract

The utility model provides a novel butterfly micro-resistance slow closing check valve, which is used for effectively preventing fluids in a pipeline from flowing back, and is mainly characterized in that a slow closing device is fixed to a closed position of a valve body of the check valve corresponding to a rubber-coated valve plate and comprises a slow closing seat, a slow closing spring pressing sleeve, a slow closing seat guide sleeve, a retainer ring, a flow regulating valve and a slow closing shaft, a slow closing spring is arranged between the slow closing seat and the slow closing spring pressing sleeve, the retainer ring for clamping the slow closing spring pressing sleeve is arranged at the end of the slow closing seat guide sleeve and is fixed onto the slow closing seat, the slow closing spring pressing sleeve moves along the slow closing seat guide sleeve, the bottom of the slow closing spring pressing sleeve is provided with a valve opening, the flow regulating valve is arranged on the slow closing seat, the slow closing shaft is fixed onto the rubber-coated valve plate, and a free end of the slow closing shaft is opposite to the slow closing spring pressing sleeve. The check valve has the advantages of simple structure, low cost, convenience in replacement and the like.

Description

Novel butterfly Tiny Drag Slow Shut Check Valves

Technical field

The utility model relates to a kind of safety check, especially a kind of butterfly Tiny Drag Slow Shut Check Valves.

Background technique

At present, be used for the pipeline of industries such as oil, chemical industry, pharmacy, metallurgy, coal, electric power, urban water supply and sewerage, lean on the power that water pump and motor propelling fluid produce in the pipeline and open and close automatically; For preventing medium refluence, water pump and motor counter-rotating; The operation of guarantee network security, existing butterfly check valve often is with needle value and oil hydraulic cylinder buffer valve, and this butterfly Tiny Drag Slow Shut Check Valves is when the fluid forward flow; Valve plate is owing to be unlocked by the effect of the pressure of fluid own; The fluid of band pressure is pressed the oil in the piston cavity epicoele through going up aperture in the valve body in the pipeline, and oil, is released piston through oil cylinder through oil pipe; Simultaneously because valve plate receives the torsion spring reaction force, so the unlatching of valve plate is more slowly.When the fluid reverse flow, the active force of the weight of valve plate itself, the elastic force of torsion spring and adverse current fluid makes valve plate move to closing direction.When valve plate moves to piston,, stop the quick closedown of valve plate owing to receive the hydraulic pressure of piston assembly; Oil in the oil cylinder is regulated through oil pipe and needle value, gets back to then in the piston cavity epicoele, and valve plate is closed up to fitting like a glove with sealing surface slowly; This butterfly Tiny Drag Slow Shut Check Valves Slow Close is effective, but the pipeline distance, oil pressure transmits apart from the borough chief; Pipeline exposes, and breaks easily.In addition, cost is high, refuels also inconvenient.

Summary of the invention

To above-mentioned deficiency, it is a kind of simple in structure that the utility model provides, the novel butterfly Tiny Drag Slow Shut Check Valves that need not to refuel.

For achieving the above object, this novel butterfly Tiny Drag Slow Shut Check Valves comprises valve body, encapsulate valve plate and slow closing device, on the encapsulate valve plate; With the offside of slow closing device surface of contact a valve rod is arranged, the two ends of valve rod are enclosed within the valve rod rotary sleeve, and the valve rod rotary sleeve is fixed on the encapsulate valve plate; The valve plate torsion spring is arranged on the valve rod, and the encapsulate valve plate can rotate around valve rod, in the valve body; With the corresponding part that the encapsulate valve plate is closed slow closing device is installed, slow closing device is fixed on the valve body through clamping bolt

Further; Said slow closing device comprises Slow Close seat, Slow Close spring, Slow Close spring press-cover, Slow Close seat guide sleeve, back-up ring, flow control valve and Slow Close axle, and the Slow Close spring has a back-up ring that blocks the Slow Close spring press-cover in the end of Slow Close seat guide sleeve between Slow Close seat and Slow Close spring press-cover; Back-up ring is fixed on the Slow Close seat; A valve opening is arranged at Slow Close spring press-cover bottom, and the Slow Close spring press-cover moves along Slow Close seat guide sleeve, also has a flow control valve on the Slow Close seat; The Slow Close axle is fixed on the encapsulate valve plate, and its free-end faces the Slow Close spring press-cover.

Further, described encapsulate valve plate is the semicircle valve plates of left and right two fans, and the semicircle valve plate of two fans links together through the valve rod of centre, and corresponding slow closing device also is left and right two.

Further, described two slow closing devices are fixed on the valve body symmetrically, lay respectively at the corresponding part of the free end points of two semicircle valve plates.

Because novel butterfly Tiny Drag Slow Shut Check Valves directly carries out Slow Close through the slow closing device of valve body both sides, the direct Slow Close of short distance under Slow Close spring and hydraulic action, efficient is high, and has simple in structurely, and cost is low, changes characteristics such as convenient.In addition, through the elasticity coefficient of adjustment flow control valve and change Slow Close spring, the length of may command encapsulate valve plate Slow Close time.

The principle of the utility model is:

Opening process: water pump and drive motor thereof are started working; Under the promotion of fluid positive flow; The encapsulate valve plate is owing to receive the pressure and the interior Slow Close spring force effect of slow closing device of fluid itself; Promote the Slow Close spring press-cover and move, and then promote to be fixed on the Slow Close axle of encapsulate valve plate, promptly promote the encapsulate valve plate along Slow Close seat guide sleeve.Simultaneously, the encapsulate valve plate also receives the reaction force of valve plate torsion spring, so fluid positive pressure and Slow Close spring are to the active force of the encapsulate valve plate reaction force greater than the valve plate torsion spring, the encapsulate valve plate is slowly opened under small resistance.This process has been accomplished the opening process of butterfly Tiny Drag Slow Shut Check Valves, makes the encapsulate valve plate reach the complete opening state from buttoned-up status.

Close closed procedure: corresponding, when water pump and drive motor thereof quit work, under the promotion of fluid reverse flow; The pressure of the elastic force of valve plate torsion spring and adverse current fluid itself makes encapsulate valve plate and valve rod rotary sleeve move to closing direction around valve rod together, and when the encapsulate valve plate moved to the Slow Close seat, the Slow Close axle was run into the bottom of Slow Close spring press-cover earlier; Promoting the Slow Close spring press-cover moves; And then compression Slow Close spring, along with promoting the Slow Close spring press-cover, the Slow Close axle constantly compresses the Slow Close spring along Slow Close seat guide sleeve, and the resistance of Slow Close spring and fluid is increasing; Under the acting in conjunction of Slow Close spring and fluid resistance, effectively stop the quick closedown of encapsulate valve plate.Along with fluid is discharged through valve opening, fluid resistance reduces until disappearance gradually, and the resistance of Slow Close spring and fluid reduces gradually; The suffered resistance of encapsulate valve plate reduces gradually; And the active force of adverse current fluid and valve plate torsion spring is constant, and therefore, the encapsulate valve plate slowly closes to and fits like a glove.This process has been accomplished the pass closed procedure of butterfly Tiny Drag Slow Shut Check Valves, makes the encapsulate valve plate reach buttoned-up status from the complete opening state, does not have bump during Slow Close.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Description of drawings

Fig. 1 is this practical butterfly Tiny Drag Slow Shut Check Valves structural representation.

Fig. 2 is that the A-A of Fig. 1 is to sectional drawing.

Fig. 3 is that the B-B of Fig. 1 is to sectional drawing.

Fig. 4 is novel butterfly Tiny Drag Slow Shut Check Valves slow closing device partial enlarged drawing.

Among Fig. 1-Fig. 4: 1, valve body; 2, clamping bolt; 3, Slow Close seat; 4, Slow Close seat guide sleeve; 5, Slow Close spring; 6, Slow Close spring press-cover; 7, flow control valve; 8, Slow Close axle; 9, back-up ring; 10, encapsulate valve plate; 11, valve opening; 14, valve rod rotary sleeve; 15, valve rod; 16, valve plate torsion spring.

Embodiment

Like Fig. 1, Fig. 2 and shown in Figure 3, this novel butterfly Tiny Drag Slow Shut Check Valves comprises valve body 1, encapsulate valve plate 10 and slow closing device, and encapsulate valve plate 10 is the semicircle valve plates 10 of left and right two fans; The semicircle valve plate 10 of two fans links together through valve rod 15; Form the circular valve plate 10 of a closure, the two ends of valve rod 15 are valve rod rotary sleeves 14, and valve rod rotary sleeve 14 is fixed on the encapsulate valve plate 10; Valve plate torsion spring 16 is arranged on the valve rod 15, and encapsulate valve plate 10 can be around valve rod 15 rotations.In the valve body 1, a slow closing device respectively is installed with two fan encapsulate valve plates, 10 closed corresponding parts.As shown in Figure 3, for reaching desirable Slow Close effect, two slow closing devices are fixed on the valve body 1 corresponding with semicircle encapsulate valve plate 10 arcuate midway points symmetrically, specifically are to be fixed together with valve body 1 with the Slow Close seat 3 of clamping bolt 2 with slow closing device.As shown in Figure 4, described slow closing device comprises Slow Close seat 3, Slow Close spring 5, Slow Close spring press-cover 6, Slow Close seat guide sleeve 4, back-up ring 9, flow control valve 7 and the Slow Close axle 8 of bottom, and Slow Close spring 5 places between Slow Close seat 3 and the Slow Close spring press-cover 6; The two ends of Slow Close spring 5 are unfixing, in the end of Slow Close seat guide sleeve 4 back-up ring 9 that blocks Slow Close spring press-cover 6 arranged, and prevent that Slow Close spring press-cover 6 from coming off; Back-up ring 9 is fixed on the Slow Close seat 3, in Slow Close spring press-cover 6 bottoms a valve opening that runs through 11 is arranged, draining when being used for 10 opening and closing of encapsulate valve plate; Slow Close spring press-cover 6 moves around along Slow Close seat guide sleeve 4, also has a flow control valve 7 on the Slow Close seat 3, regulates flow control valve 7; Can control the length of safety check Slow Close time; On encapsulate valve plate 10, the fixing Slow Close axle 8 in corresponding part when closed with Slow Close spring press-cover 6, the one end thread of Slow Close axle 8; Be fixed on the encapsulate valve plate 10, its free-end faces the bottom of Slow Close spring press-cover 6.

Claims (4)

1. a novel butterfly Tiny Drag Slow Shut Check Valves comprises valve body, encapsulate valve plate and slow closing device, on the encapsulate valve plate; With the slow closing device surface of contact there is a valve rod side, the two ends of valve rod are enclosed within the valve rod rotary sleeve, the valve rod rotary sleeve is fixed on the encapsulate valve plate; The valve plate torsion spring is arranged on the valve rod, and the encapsulate valve plate can rotate around valve rod, it is characterized in that in the valve body; With the corresponding part that the encapsulate valve plate is closed slow closing device is installed, slow closing device is fixed on the valve body through clamping bolt.

2. novel butterfly Tiny Drag Slow Shut Check Valves according to claim 1; It is characterized in that said slow closing device comprises Slow Close seat, Slow Close spring, Slow Close spring press-cover, Slow Close seat guide sleeve, back-up ring, flow control valve and Slow Close axle, the Slow Close spring has a back-up ring that blocks the Slow Close spring press-cover in the end of Slow Close seat guide sleeve between Slow Close seat and Slow Close spring press-cover; Back-up ring is fixed on the Slow Close seat; The Slow Close spring press-cover moves along Slow Close seat guide sleeve, and a valve opening is arranged at the bottom of Slow Close spring press-cover, and a flow control valve is arranged on the Slow Close seat; The Slow Close axle is fixed on the encapsulate valve plate, and its free-end faces the Slow Close spring press-cover.

3. novel butterfly Tiny Drag Slow Shut Check Valves according to claim 1 is characterized in that the encapsulate valve plate is the semicircle valve plates of left and right two fans, and the semicircle valve plate of two fans links together through valve rod, and corresponding, slow closing device also is left and right two.

4. novel butterfly Tiny Drag Slow Shut Check Valves according to claim 3; It is characterized in that said slow closing device is fixed on the valve body symmetrically, lays respectively at the corresponding part of the free end points of two semicircle valve plates, slow closing device is fixed on the valve body corresponding with semicircle encapsulate valve plate arcuate midway point.

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