CN2304795Y - Water saving valve - Google Patents

Abstract

The utility model relates to a water saving valve capable of automatic pressure relief for opening and automatic delay closing. The utility model is characterized in that the inner hole of a valve cap is provided with a water discharging slot, and the water discharging slot and a valve body are in sliding fit; mixed dynamic throttling is composed of a gap between a float which is small as far as possible and the valve body and symmetrical throttling slots on the surface of the outer circle of the float; a sealing structure is formed by a lug boss with a circular cambered surface; a recovering type water discharging and pressure releasing structure is composed of an annular water discharging slot which is formed between a clamping cap and the valve body; an upper pressing spring between the valve cap and the valve body is a tower-shaped spring, and the top of the float is provided with a water flowing slot. The utility model which is reformed has the advantages of compact and reasonable structure, cabinet appearance, convenient use, stable and correct operation, improved mechanism performance and water saving performance, and reduced cost.

Description

Water-saving valve

The utility model relates to a kind of automatic pressure-relieving to be opened, and postpones the auto cut-off water saving valve.

The patent 90225533.9 of being applied in December, 90 by me discloses a kind of automatic control release unlatching, postpone Self-closed water valve, it is characterized in that connecting with bonnet, but with on the spool that float links to each other do not have one or several microscler release weep hole, pressing spring down is housed between float and valve gap, the float lower end is a spur, and the wedge angle of concentrating for pressure between sealing valve port pad sealing, the spool lower end is a wedge angle channel shaped boss, constitute the wedge angle sealing that pressure is concentrated with the seal washer on the valve gap, the water valve of this structure is owing to the seal approach of saving between spool and float, so manufacturing process is simple, cost is low, its water supply delay time is to be determined by the stroke length of pressing bonnet, and good sealing effect, does not leak under the negative pressure of zero-pressure and certain value, but through nearly 8 years use, this water valve also exists some problems.As pressing spring on the former water valve is helical spring, and the problem that helical spring exists is that its spring rate is changeless, and the operator is controlled the stroke size of pressing bonnet, acquires a certain degree of difficulty, and is difficult for grasping, and the validity of control is also lower.Be single annular slot dynamic throttling between former for another example water valve float and the valve body, the gap is big between float and valve body hole, and the guidance quality that float moves is poor, easily tilt, skew produces friction, wearing and tearing, even retardation such as block, throttling poor stability simultaneously, each water valve is opened after, water output changes greatly, influence the water valve performance, its throttling flow maximum can differ from 2.5 times.In addition, between former Inner part of water valve lower end annular wedge angle and the drain opening sealing gasket, be the centralized sealing of annular wedge angle pressure between float lower end annular wedge angle and the water outlet seal washer, the end of annular wedge angle scratches rubber gasket when hydraulic pressure is big easily because very sharp, reduced its working life, moreover the ring-type wedge angle formed by its bi-side intersection line, because of nonconcentricity, and reasons such as different circularity, often cause annular intersection planeness relatively poor, influence sealability.What the reservoir of former water valve, release, draining adopted is the formula of leaking, and falls into undergroundly at last, though the water yield is few, also causes certain waste, makes ground untidy.The interior guiding type that moves up and down that the bonnet of former water valve adopts leads, and guiding length is short, and immobilizes, and easy deflection when bonnet moves up and down produces and rubs, and weares and teares, even blocks.Former water valve float top is a ring plain, and the problem of its existence is when moving to the top on the float, and its top ring plain contacts with valve gap bottom ring plain, gap between two ring plains is because of making, assembling the size of hydraulic pressure, the difference of float relative position in valve body hole, sometimes may be zero, sometimes may be very little, sometimes again may be bigger, randomness is very big, this will have a strong impact on the length of self-closing time of water valve, and the size of each water output greatly reduces the usability of water valve.

The purpose of this utility model is improved accordingly to patent 90225533.9 above-mentioned existing problems exactly, makes it performance and more is tending towards rationally, improves working life, improves the water saving ability.

Water-saving valve described in the utility model and patent 90225533.9 described water valve working principles, the basic fundamental of using: dynamic throttling, the centralized sealing of pressure, it is identical not having motion friction etc., just done corresponding adjustment on some key component structurals, concrete scheme is as follows:

At first with the cylindrical pressing spring of going up of former water valve, change the turriform spring into, because of the turriform spring rate is variable, it can become along with the increase of compressed stroke greatly, thereby the size of pressing the bonnet stroke is easy to grasp, and accurate;

Second, annular slot dynamic throttling single between former water valve float and the valve body is changed into based on plane gap, with minimum annular slot is the mixing dynamic throttling of assisting, scheme is to guarantee under the situation that float normally moves up and down, make little that slit between float and valve body tries one's best, the 1/3-1/4 that is about single annular slot, still play the annular slot throttling action, account for 1/3 of total amount of restriction, two throttling grooves of symmetric arrangement on the outer cylinder surface of float, and form the almost plane throttling action between the valve body hole wall, be about 2/3 of throttling total amount, the flow that makes above-mentioned two throttlings equates that with single annular slot throttling flow effect is identical.The gap is very little between float and valve body hole, and the linarity that float moves up and down is all right, and motion is smooth, and because of the annular slot throttling only is 1/3 of throttling total amount, the influence of its change at random is relatively also just little, thereby has improved the stability of throttling and the performance of water-saving valve.

The 3rd, the annular wedge angle of spool lower end is changed over the annular cambered surface boss, form sealing with the drain opening sealing gasket;

Change the annular wedge angle of float lower end into conical surface boss, water outlet sealing gasket that the centre is a taper hole of cover on conical surface boss, the two forms an assembly, the core retainer plate that other is provided with a upper end is the annular cambered surface boss, press fit is installed in the corresponding core retainer plate of the valve body lower portion hole, annular cambered surface is made up of three parts, both sides are ring surface, middle with cambered surface and the two tangent connection, thereby the planeness height of annular cambered surface, good sealing effect, the end of circular arc can be along with the increase of hydraulic pressure, automatically increase the area of contact of rubber gasket and annular cambered surface, improved bearing capacity and life-span;

The 4th, reservoir release with water valve, the draining type changes into and leaking, way of recycling, concrete scheme is to form a ring-type collecting annulus between card cap and valve body lower portion, with UNICOM in collecting annulus and the valve body, importing the water in the groove in the valve body again by L shaped backwater hole, importing is to rely on gravity and the formed negative pressure of water outlet high-velocity flow, and double action is finished;

The 5th, the water valve bonnet moved up and down change outer guiding type guiding into, concrete scheme is to leave the gap between spool external cylindrical surface and bonnet central bore, between bonnet inner bore and the valve body top external cylindrical surface for being slidingly matched, and as the upper and lower mobile guide of bonnet, outer guiding type guiding, targeting part is long, and with the moving down and increase of bonnet, the bonnet motion flexibly, and is reliable;

The 6th, on the ring plain of water valve float top, open tank, can both be same when making float upwards move to the top at every turn, in time, move down smoothly.

Compact more through improved water-saving valve structure, more reasonable, external form is small and exquisite, and is attractive in appearance, is easy to use, and stable operation accurately, no matter be mechanical property, or water-saving performance all has increased significantly, and cost descends to some extent.

With reference to the accompanying drawings water-saving valve of the present utility model is carried out structural detailed explanation below.

Fig. 1 water-saving valve structural representation

Fig. 2 water-saving valve A-A view

Fig. 3 water-saving valve B-B view

Fig. 4 water-saving valve C-C view

Wherein: 1. 3. 6. pressing spring 8. discharge outlet sealing gaskets 9. external cylindrical surfaces 10. valve bodies 11. reservoirs 12. floats 13. imports 14. delivery port sealing gaskets 15. card 22. annular cambered surface boss 23. conical surface boss, 24. slits, 25. water-flowing troughs (4), 26. annular cambered surface boss, 27. gaps, cap 16. throttling channels (2) 17. delivery ports, 18. core retainer plate 19.L shape backwater holes (6), 20. ring-type water legs, 21. core retainer plate holes on the spool 7. of valve gap 4. screws, 5. release osculums (4) of bonnet 2. rhones (10)

Bonnet (1) is installed in the upper end of valve body (10), bonnet inner bore is provided with 10 rhones (2), between bonnet and the valve body top external cylindrical surface (9) for being slidingly matched, by screw (4) spool (6) is fixed in the bonnet top center hole, combine as a whole, become a rigid unitary, have four long-round-shape release weep holes (5) on the spool, fix a valve gap (3) in the valve body upper inner, spool passes bonnet central bore, leave gap (27) between spool external cylindrical surface and the bonnet central bore, the lower end of spool is an annular cambered surface boss (26), with drain opening sealing gasket (8) the formation sealing on the valve gap.Adorn pressing spring (7) on the turriform between valve gap and the bonnet, establish water intake (13) in the valve body side, water outlet (17) is arranged on the below of valve body, at water outlet and water inlet the float (12) that can fluctuate is set, guaranteeing under the preceding topic that float normally moves up and down, make the slit (24) of float and valve body as far as possible little, on the outer cylinder surface of float, two throttling grooves of symmetric arrangement (16), on the ring plain of float top, open four float water-flowing troughs (25), conical surface boss (23) is made in the lower end of float, water outlet sealing gasket (14) that the centre is a taper hole of cover on conical surface boss, the two becomes an assembly, the core retainer plate that other is provided with a upper end is annular cambered surface boss (22) (18), press fit is installed in the corresponding core retainer plate of the valve body lower portion hole (21), forms water storage cavity (11) between float and the valve gap.Water outlet peripheral hardware one card cap (15) forms a ring-type collecting annulus (20) between card cap and valve body lower portion, by six L shaped slotted holes (19) with collecting annulus and valve inner UNICOM.

Claims (1)

1. water-saving valve, it is made up of parts such as valve body, bonnet, spool, valve gap, spring, sealing gasket, float, core retainer plates, it is characterized in that:

Last pressing spring (7) between bonnet (1) and the valve gap is the turriform spring;

Slit (24) between float (12) and the valve body (10) is not influencing try one's best under the situation about moving up and down little, two throttling grooves of symmetric arrangement (16) on the float outer round surface;

Spool (6) lower end is annular cambered surface boss (26);

The float lower end is conical surface boss (23), water outlet sealing gasket (14) that the centre is a taper hole of cover on conical surface boss, the two forms an assembly, the core retainer plate that other is provided with a upper end is annular cambered surface boss (22) (18), and press fit is installed in the corresponding core retainer plate of the valve body lower portion hole (21);

Form a ring-type collecting annulus (20) between card cap (15) and the valve body lower portion, by L shaped backwater hole (9) with UNICOM in collecting annulus and the valve body;

Bonnet inner bore is provided with rhone (2), is slidingly matched between itself and the valve body top external cylindrical surface (9), leaves gap (27) between spool external cylindrical surface and the bonnet central bore;

The float top has water-flowing trough (25).

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