CN101205980A

CN101205980A - Cam pressure-increasing valve

Info

Publication number: CN101205980A
Application number: CNA2006101554448A
Authority: CN
Inventors: 黄金伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-22
Filing date: 2006-12-22
Publication date: 2008-06-25
Anticipated expiration: 2026-12-22
Also published as: CN100564967C

Abstract

The invention relates to a cam forcing valve. A valve core 20 abuts tightly against the water inlet of a valve body 1 for closure, and the valve core rotates along a black arrow for opening. The arm 22 of the valve core is clamped by a bolt 24a to form an integral cam 24 and also revolves synchronously around a valve core shaft 21. When the valve is closed, the big R of the cam pushes a plate spring 25 bent, thereby enabling the closing pressure of the valve to reach a top water pressure plus safety factor value. At that time, a stopper N fixedly connected with the cam meets a spring bracket 26. When the valve is opened (rotating the valve along the black arrow), the small R1 of the cam is enabled to face the plate spring 25 which returns to straightness and just touches the cam for resisting a water flow impact pressure. At that time, a fully opened stopper M rotates to a long and two-short-dash line M1 and meets the straightening plate spring (represented by a straight long and two-short-dash line) for limiting. The valve has: a) autocompensation of wear clearance; b) antifriction function due to the cam capable of increasing and decreasing pressure; c) quench hardened and polished friction part between the plate spring 25 and the cam 24 with long integral service life.

Description

Cam pressure-increasing valve

The present invention is a mechanical field, a kind of cam pressure-increasing valve.

The object of the invention provides that a kind of switch is quick, flow is big, environmental protection and the cheap water valve of cost performance.

Fig. 1, spool 20 pushes against the water intake of valve body 1, is that valve cuts out, and white arrow is represented hydraulic pressure.When spool rotates (Fig. 2), opening of valves by the black direction of arrow.It is the integral body of precision casting with axle 21 that spool has upper and lower each transverse arm 22, and there is screw in arm 22 bending parts, are the places that screws in screw 24a, clamping, installation cam 24.Axle 21 right sides respectively have blockage location 23 up and down, are the location of holding cam 24.Leaf spring 25 up and down pushes against all the time on the left of cam separately up and down.As can be seen from Figure 2: when valve cut out, the big R of cam just withstood spring 25, made spring 25 be subjected to maximum deflection, and the water pressure resistance that reach valve this moment is: the highest hydraulic pressure adds value of safety factor value.While and the spacing N that cam connects firmly, withstand spring support 26.Open valve (by black arrow) rotational valve core 20, the little R1 that makes the cam 24 that rotates synchronously with spool is towards leaf spring 25, and leaf spring 25 resiliences become linear state, and touch cam 24, prop up water flow impact pressure.The spacing M of standard-sized sheet transfers to the place shown in the double dot dash line M1 this moment, and the leaf spring 25 (representing with a straight double dot dash line) that resilience becomes linear state is lived in central collision, defines the position of full open at this point.

Leaf spring 25, each one all seals in same spring support 26 up and down; Three-dimensional section such as Fig. 3 of spring support 26, the rectangular opening E of the left and right sides, top and the left and right sides, bottom penetrates leaf spring 25.On the horizontal bent plate below the spring support 26 a breach F being arranged, is the lower end position that limits the axle 21 of spool, and the lower end of axle 21 is stood on the interior bottom plane of valve body, only to compensation, the translation of supercharging direction.

Fixing of spring support 26: its back has the hole G of punch press stretching, just in time allocates the osculum interior (Fig. 1, Fig. 2, Fig. 3) in valve body 1 left side into, and the lower end of spring support 26 withstands on the internal surface at the bottom of the valve, and the right side is blocked by leaf spring 25 by cam.

The upper end of poppet shaft 21, one disc-shaped flange 21a is arranged, one groove (Fig. 4) is arranged above it, the left end of groove has the breach H that opens flange, be used for becoming flexible the protruding ridge 11 of allocating semiaxis 10 lower ends into, the left end on the protruding ridge 11 has a protruding rank J, just in time hooks breach H, guarantee that spool can only move towards supercharging, compensation direction, restriction moves towards other directions.

Be inserted in three O RunddichtringOs 4 on the semiaxis 10, again from cover 2 below be upward through, the big pillow block 12 of semiaxis lower end is propped up cover 2 inner planes, the top double nut 13 and the tightening position of semiaxis, again the upper end semiaxis on have one arc to mill flat place be the dress handle, be the screw thread that is used for screwing in fastening nut at last.So semiaxis 10 is a center of rotation to cover 2 center hole, can rotate.The effect that bottle opener (being turn screw) drives (metaphor) slotted head screw is played on the protruding ridge 11 of semiaxis lower end, just can actuating valve mandrel 21, and make valve core rotation reach the purpose of open and close, spool 20 plays compensation, the supercharging direction moves but do not place restrictions on.

Lid 2 is used screw-thread fit with valve body 1, with 2 big O RunddichtringO 2 sealings.Usually do not have water herein, but as the boiling water main valve, may also there be water at this place, just in case seal ring in high-temperature water, be dissolved in the potable water from fluoroplastic or the unfavorable micro substance of drinking of other elevated-temperature seal plastics, possibility can be said to reduce to and equal zero.Because pillow block 12 and lid 2 and cover 2 with the end face surface of contact of valve body 1, all bright and clean through being machined into, smooth, applying close joint are seldom understood seepage, just in case seepage, also to excessive.

The characteristics of this valve are: 1, do not have a seal ring directly to be immersed in the water; 2, the slit of automatic compensate for wear; The anti-attrition function that 3, cam increase and decrease pressure arranged; 4, leaf spring and cam (friction position) all harden, and be wear-resisting, so comprehensive life is long, environmental protection is good.

Description of drawings:

Fig. 1 is the cam pressure-increasing valve sectional drawing.

Fig. 2 is A-A, the B-B section of Fig. 1.

Fig. 3 is the three-dimensional section of spring support.

Fig. 4 is the protruding ridge of semiaxis, the straight groove stereogram on the poppet shaft.

Claims

1. cam pressure-increasing valve comprises the cam that joins together with spool, the rotation in opening, closing, and the spool that hold out against, loose contact leaf spring comes supercharging to close, the spool when decompression is opened reduces friction, or closes tight stifledly leak extremely.

2. cam pressure-increasing valve according to claim 1, feature are the straight groove and the horizontal bent plates of spring support of spool upper end, and the restriction spool can only be to supercharging, compensation slit direction translation.