CN101109455A

CN101109455A - Frustum valve

Info

Publication number: CN101109455A
Application number: CNA2007100550849A
Authority: CN
Inventors: 陈亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-30
Filing date: 2007-08-30
Publication date: 2008-01-23

Abstract

A conic valve is provided, which essentially comprises a valve body, a spool, a valve cover and a valve rod, and is characterized in that, the contact surface between the spool and the valve body is conic, the contact surface between the valve rod and the valve cover is also conic, and is not sealed by a seal ring; on the valve rod, a compression spring is mounted; the outward tension of the compression spring presses tightly upward the contact surface between the valve rod and the valve cover, and downward the contact surface between the spool and the valve body; after the spool is placed into the valve body, certain gap exists between the bottom of the spool and the bottom of the inner cavity of the valve body, after the contact surface between the spool and the valve body becomes worn, the spool will move downward. The invention is of simple structure, easy to manufacture; both the contact surface between the spool and the valve body and the contact surface between the valve rod and the valve cover are conic, by the compression spring, the two contact surfaces are always closed, no fluid leakage will happen; the valve with wear-/hi-temperature-resistant material inlayed is applicable for different operation environments in production and life, can prolong the service life several to more than ten times comparing with prior technology.

Description

A kind of frustum valve

One, technical field

The present invention relates to a kind of industry and civilian valve.

Two, background technique

Valve industry and civilian in be widely used, though specifications and models are varied, material, structure also are not quite similar, purposes all is used to control fluid.With structure of the present invention is akin stopcock arranged, they all are made up of valve body, spool, valve rod and valve gap basically, the common issue with of the valve of prior art existence at present is, between the sealing surface of spool and valve body, the sealing junction of valve rod and valve gap, after using certain hour, all can produce wearing and tearing between the sealing surface, produce the gap, make escape of liquid; Sealing junction at the valve rod and the valve gap of prior art, all be to adopt packing seal, promptly adopt sealing gasket or seal ring etc., compress with machinery type, excessive as pressure, the operated valve difficulty can be aggravated the wearing and tearing to sealing material again, pressure is little uses and will produce looseningly soon, causes escape of liquid.Though the packing seal form is varied, material also is not quite similar, through the wearing and tearing that rotate back and forth after a while, and the perhaps corrosion of flowing medium, perhaps high-temperature work environment etc. all can make sealing gasket or seal wears, aging.Causing fluid to leak from the junction of valve rod and valve gap is a more scabrous problem.The spool of stopcock and the junction plane of valve body are conical surfaces, this product has just determined that its adaptation and driving fit pressure are unmodifiable when dispatching from the factory, when new the use, tightness, pressure, adaptation are fine, after using after a while, the junction plane experience wear, the gap can be strengthened, and also can cause escape of liquid; In addition, because the spool and the gap between the valve body of the valve of prior art can not regulate automatically, also can causing gets rusty between spool and the valve body blocks to remove and does not motionlessly open or close incessantly, until losing function.

Three, summary of the invention

The technical problem to be solved in the present invention is: design a kind of frustum valve, mainly solve between spool and the valve body surface of contact, the escape of liquid problem between valve rod and the valve gap, the escape of liquid problem of prior art is solved.

The technological scheme that solution the technology of the present invention problem is taked is:

The surface of contact of spool and valve body is designed to conical surface, the surface of contact of valve rod and valve gap also is designed to conical surface, seal without sealing gasket; Valve rod upper end passes the valve gap mounting knob, and the bottom is inserted on the spool in the square groove on the plane, and a pressure spring is installed on valve rod, and the outside tension force of pressure spring upwards compresses the surface of contact of valve rod and valve gap, and downward surface of contact with spool and valve body compresses; Spool is put at the end of the end of valve body back valve core and body cavity a gap, and the contact surface abrasion back valve core of spool and valve body can move down, and is in closed state at the effect lower valve core of pressure spring and the surface of contact of valve body simultaneously always.

Spool adopts the spool of frustum structure, perpendicular to the frustum axis through hole is arranged, and the cavity bottom of valve body is the taper type cavity, and the frustum spool is installed in the taper type cavity; The top is a conical surface in the valve gap, and there is a umbrella boss valve rod middle and upper part, and the conical surface on the umbrella boss cooperates with top conical surface in the valve gap; The pressure spring upper end contacts the last plane contact of lower end and frustum spool with the lower plane of umbrella boss.

In order to be applicable to different working environments, increasing wear resistance, the heat-resisting quantity of valve, all be inlaid with wear-resisting or exotic material at the surface of contact of surface of contact, spool and the valve body of valve rod and valve gap.Wear-resisting or exotic material can be selected industrial ceramics, graphite, engineering plastics or special glass.

Good effect of the present invention is: simple in structure, easily manufactured; The surface of contact of the surface of contact of valve rod and valve gap, spool and valve body is conical surface, and under the effect of pressure spring, two surface of contact are in closed state all the time, can not produce the escape of liquid phenomenon, than working life of prior art prolonging several times to tens times; Be inlaid with valve wear-resisting, exotic material, produce and life in applicable to various operating environments.

Four, description of drawings

Accompanying drawing 1 is a structural representation of the present invention; Accompanying drawing 2 is plan views of accompanying drawing 1; Accompanying drawing 3 is spool schematic representation; Accompanying drawing 4 is plan views of accompanying drawing 3; Accompanying drawing 5 is left views of accompanying drawing 3.

Five, embodiment

Shown in accompanying

drawing

1,2, the present invention is made up of valve gap 2, valve rod 1, pressure spring 4, spool 8, valve body 9, handle 12, spool 8 structures are shown in accompanying

drawing

3,4,5, spool 8 adopts the spool of frustum structure, perpendicular to the frustum axis through hole 7 by fluid is arranged, planar central has a square groove 5 on the spool 8; The cavity bottom of valve body 9 is the taper type cavity, the tapering of frustum spool 8 is identical with the tapering of taper type cavity, frustum spool 8 is installed in the taper type cavity, and the taper type cavity inner surface of valve body 9 and frustum spool 8 all are inlaid with high-abrasive material with the junction plane of valve body 9; Spool 8 is put at the end of the end of valve body 9 back valve cores 8 and valve body 9 inner chambers has one to regulate gap 6; The top forms a conical surface by the high-abrasive material of inlaying 3 in the valve gap 2, there is a umbrella boss 10 valve rod 1 middle and upper part, forming a conical surface by the high-abrasive material of inlaying 11 above the umbrella boss 10, is a plane below, and the tapering of top conical surface is identical with umbrella boss 10 taperings in the valve gap 2; Be with a pressure spring 4 below the umbrella boss 10 on valve rod 1, valve rod 1 upper end passes the hole mounting knob 12 at valve gap 2 tops, and the lower end is square being inserted on the frustum spool 8 in the square groove on the plane 5; Pressure spring 4 upper ends contact with the lower plane of umbrella boss 10, the last plane contact of lower end and frustum spool 8.

Claims

1. a frustum valve is made up of valve body, spool, valve gap, valve rod, it is characterized in that: spool (8) is a conical surface with the surface of contact of valve body (9), and valve rod (1) also is a conical surface with the surface of contact of valve gap (2), and seals without sealing gasket; Valve rod (1) upper end passes valve gap (2) mounting knob, the bottom is inserted on the spool in the square groove on the plane (5), go up an installation pressure spring (4) at valve rod (1), the outside tension force of pressure spring (4) upwards compresses the surface of contact of valve rod (1) with valve gap (2), downwards the surface of contact of spool (8) with valve body (9) is compressed; After spool (8) is put into valve body (9), have one to regulate gap (6) at the end of the end of spool (8) and valve body (9) inner chamber, spool (8) can move down with the contact surface abrasion back valve core (8) of valve body (9), is in closed state at the effect lower valve core (8) of pressure spring (4) and the surface of contact of valve body (9) always.

2. frustum valve according to claim 1 is characterized in that: spool (8) adopts the spool of frustum structure, and the cavity bottom of valve body (9) is the taper type cavity; The top is a conical surface in the valve gap (2), and there is a umbrella boss (10) valve rod (1) middle and upper part, and the conical surface on the umbrella boss (10) cooperates with the interior top of valve gap (2) conical surface; Pressure spring (4) upper end contacts the last plane contact of lower end and frustum spool (8) with the lower plane of umbrella boss (10).

3. according to claim 1,2 described frustum valves, it is characterized in that: surface of contact, spool (8) at valve rod (1) and valve gap (2) all are inlaid with wear-resisting or exotic material with the surface of contact of valve body (9).

4. frustum valve according to claim 3 is characterized in that: wear-resisting or exotic material is industrial ceramics or graphite or engineering plastics or special glass.