CN204900890U - Oval flashboard slip gate valve - Google Patents

Abstract

The utility model relates to an oval flashboard slip gate valve, including valve body, valve rod, flashboard and seal receptacle. The valve rod supporting is in the valve body, flashboard swing joint is at the lower extreme of valve rod, the seal receptacle is two, and it sets up on the access opening of gate valve, and grips the flashboard face -to -face, forms the double containment on flashboard two sides, the flashboard with valve rod axis looks vertically cross -section on its shape be oval, the seal receptacle is the cambered surface with the binding face of flashboard to agree with mutually with the oval cambered surface on the flashboard. Compare with traditional plate valve, the utility model discloses an useful contribution lies in: 1, sealed face between flashboard and the seal receptacle is the cambered surface, has increased area of contact between the two, and the pressure on the unit area reduces promptly, and corresponding frictional force reduces thereupon, can effectively reduce the degree of wear between flashboard and the seal receptacle, 2, the oval flashboard of the face -to -face obvolvent of two cambered surface seal receptacles, the upper and lower operation that enables the flashboard is steady more, smooth and easy, the liter of valve rod, fall also free and relaxed.

Description

A kind of oval gate panel slide gate valve

Technical field

The utility model relates to a kind of sliding gate, particularly relates to the sliding gate that a kind of closure member is oval flashboard, belongs to valve design manufacturing technology field.

Background technique

Traditional sliding gate, usually using parallel gate plate as closure member, during throttle down, rotates clockwise handwheel, and flashboard is displaced downwardly to closing passage hole, bottom; When opening flashboard, be rotated counterclockwise handwheel, flashboard moves, or pod apertures and port hole connect, or port hole strengthens gradually; During to limit position, or pod apertures and port hole coincide completely, or port hole standard-sized sheet.For ensureing the sealing between sealing seat and flashboard, have by medium pressure action, push entrance point sealing seat to flashboard direction, form larger seal pressure, thus form first and seal, meanwhile, flashboard is pressed on outlet end sealing seat, become double seal; What have arranges wave spring at the rear portion of sealing seat, and makes two relative sealing seats fit tightly flashboard by its elastic force, forms two plane double-sealings.But quovis modo, the friction between sealing seat and flashboard is all great, once wearing and tearing are between the two hurried, will have a strong impact on sealing effect, and make valve invalidation.Therefore, except adopting high-abrasive material making easily damaged parts or spraying abrasion-proof alloy except rapid wear face, design the more rational ram seal face of one, to reduce its wearing and tearing as far as possible, a kind of beyond doubt not only economy but also the effective means be suitable for.

Summary of the invention

The purpose of this utility model will provide a kind of oval gate panel slide gate valve exactly, thereby through the effective area of contact increased between flashboard and sealing seat, realizes reducing abrasive effect.

To achieve these goals, the utility model takes following technological scheme to implement: a kind of oval gate panel slide gate valve, and comprise valve body, valve rod, flashboard and sealing seat, described valve rod is bearing in valve body; Described flashboard is movably connected in the lower end of valve rod; Described sealing seat is two, and it is arranged on the port hole of gate valve, and grips flashboard face-to-face, forms the double-sealing on flashboard two sides, it is characterized in that:

Described flashboard its shape on the cross section perpendicular with valve rod axis is oval;

The faying surface of described sealing seat and flashboard is cambered surface, and agrees with mutually with the oval cambered surface on flashboard.

Compared with traditional plate valve, favorable attributes of the present utility model is:

1, the sealing surface between flashboard and sealing seat is cambered surface, increases area of contact between the two, and the pressure namely in unit area reduces, and corresponding frictional force reduces thereupon, effectively can reduce the degree of wear between flashboard and sealing seat;

2, the oval flashboard of two cambered surface sealed seat surface opposite obvolvents, the upper and lower operation of flashboard can be made more steady, smooth and easy, and the ascending, descending of valve rod is also free and relaxed.

The utility model have reasonable in design, structure is simple, the advantage of easy to operate, long service life.

Accompanying drawing explanation

Accompanying drawing 1 is main sectional structure schematic diagram of the present utility model;

Accompanying drawing 2 is A-A cross section structural representation in accompanying drawing 1.

In attached Fig. 1 and 2: 1 valve body, 2 valve rods, 3 flashboards, 4 sealing seats.

Embodiment

Below in conjunction with accompanying drawing, explanation is further explained to the utility model:

As shown in accompanying drawing 1,2, valve rod 2 is bearing in valve body 1; Flashboard 3 is movably connected in the lower end of valve rod 2; Sealing seat 4 is two, and it is arranged on the port hole of gate valve, and grips flashboard 3 face-to-face, forms the double-sealing on flashboard 3 two sides; Flashboard 3 is being oval with its shape on the cross section of valve rod 2 axis perpendicular; Sealing seat 4 is cambered surface with the faying surface of flashboard 3, and agrees with mutually with the oval cambered surface on flashboard 3.

The utility model is by arranging oval flashboard 3, and sealing seat 4 and the surface of contact of flashboard 3 are designed to arc, and agree with mutually with oval cambered surface on flashboard 3, thus the elliptic arc sealing surface formed between the two, add the area of contact between surface of contact, pressure in unit area is reduced, and corresponding frictional force decreases, and wearing and tearing can be made effectively to be alleviated; The utility model also by the oval flashboard of two cambered surface sealed seat surface opposite obvolvents, can make the upper and lower operation of flashboard more steady, smooth and easy, make the ascending, descending of valve rod free and relaxed.

Claims (1)

1. an oval gate panel slide gate valve, comprises valve body, valve rod, flashboard and sealing seat, and described valve rod is bearing in valve body; Described flashboard is movably connected in the lower end of valve rod; Described sealing seat is two, and it is arranged on the port hole of gate valve, and grips flashboard face-to-face, forms the double-sealing on flashboard two sides, it is characterized in that:

Described flashboard its shape on the cross section perpendicular with valve rod axis is oval;

The faying surface of described sealing seat and flashboard is cambered surface, and agrees with mutually with the oval cambered surface on flashboard.