CN2597781Y - Balance pressure type water tap - Google Patents

Abstract

A tap comprises a columnar valve core and a valve seat which controls the fluid channel by a valve core bar, and a valve body water outlet mouth; the diameter of the valve core is less than that of the valve seat; the utility model also comprises a balance gland, the balance gland ring is covered on the valve core, the lower extreme of the balance gland is contacted with the upper extreme of the valve seat, the shoulder face of the balance cover is contacted with the upper extreme of the valve core, more than three through holes which are used for fixing the bolt and the valve seat in the same manner are opened on the balance cover. The utility model has the advantages of ensuring the facet of the valve core and the valve seat being dressed evenly, avoiding the leakage of the sealed facet and prolonging use time.

Description

Axis balance pressure type water tap

Technical field

The utility model relates to valve, and particularly low-pressure water tap is made the field.

Background technique

Existing manual balance pressure type water valve mainly by valve body, has the spool of valve core rod, valve seat, and water outlet is formed; The upper and lower end face crimping seal ring of spool and valve seat, and fit mutually, the fluid passage of the water intake of offering on the valve body in valve seat again through the spool fluid passage, is communicated with water outlet at last.Valve core rod is hinged on the spool, and two working positions are arranged, and promptly presses down and the position of upwards cocked (valve core rod drive plug cuts off the spool fluid passage or open-minded), corresponds respectively to the situation that makes whole valve fluid pathway closure and open.Fixation problem for spool and the two position of valve seat mainly contains dual mode at present, a kind ofly is: spool and valve seat are placed cylinder on the valve body, adopt top cover to be screwed on the valve body, and by top cover active force is applied on the spool that is positioned at above the valve seat.Its shortcoming is, because top cover is along the helix precession at valve body, helix has a lift angle, promptly always maintain an angle with substantially horizontal, we can say, upper-end surface for the spool that is in horizontal plane (situation when valve is installed) position, the distribution of the active force of top cover on the circumference of spool upper-end surface is unbalanced, Gu deflection and concentrate on some parts this, makes the two the discontinuity equalization of faying surface on circumference of spool and valve seat, finally cause the sealing surface unbalance stress and leak (in the practice, by adding big sealing ring and the increase pressure that spins, can keep short-term not leak, but this has just temporarily covered irrational present situation on its structure).Another kind is: adopt three screws, pass the through hole on the spool, then the spool spiral is connected on the valve seat.Its problem is, the two the crimping of valve seat and spool is fitted first, although be to determine a face by 3, remain to belong to and rely on spiral lift, on approximal surface, there is the problem of discontinuity equalization equally, second, reaching the ideal state of spool valve seat faying surface producing balanced forces, when fastening screw trip bolt, is a relatively problem of difficulty, people are difficult to accomplish that the active force that each screw is applied is identical.Thereby also there is the problem of discontinuity equalization in the faying surface of its spool and valve seat.

The model utility content

The purpose of this utility model is to provide a kind of axis balance pressure type water tap, with the problem of faying surface discontinuity equalization between the spool that solves existing balance pressure type water tap and the valve seat.This purpose is that following design is realized: a kind of axis balance pressure type water valve comprises by valve core rod and controls the fluid passage, is the spool and the valve seat of column; Valve body; Water outlet, the diameter of described spool is less than the diameter of valve seat; Also comprise the balance gland; The equilibrium pressure decorative cover is enclosed within above the spool, and its lower end surface contacts with valve seat, and the circular bead surface of balance gland contacts with the upper-end surface of spool, and equilibrium pressure covers to have and is used to the through hole more than 3 that uses screw and valve seat to fix.From above design as seen, during assembling, the balance gland is enclosed within spool outside, and its circular bead surface is pressed against formation face contact on the upper-end surface of spool, the balance gland will pass through circular bead surface from the pressure of screw, be applied to and the fit upper-end surface of spool of circular bead surface, thereby, stressed more balanced on the whole circumference of spool, promptly be, make that the seal ring of the mutual faying surface of mutual applying of spool and valve seat is stressed more to become balanced, reduced the possibility of leaking, prolonged valve working life; Next, because spool is balanced gland institute snare, its position can accurately be fixed, and is difficult for displacement, can not cause the problem of stopping up increase fluid resistance in fluid passage because of the displacement part.

Description of drawings

Fig. 1 is this novel embodiment's a sectional drawing;

Fig. 2 is the solid assembling schematic representation of shown in Figure 1 novel (removing valve body, water outlet);

Fig. 3 is that balance gland shown in Figure 2 is by the stereogram after dissecing.

Embodiment

Fig. 1 Fig. 2 Fig. 3 illustrates, and identical (as described above) of spool and valve seat 3 internal structures and existing balance pressure type water tap, during this was novel, the diameter of spool 2 (being column) was less than valve seat 3 diameter of (being column).The lower end surface of spool 2 places on the upper-end surface of valve seat 3, and the opening of fluid passage is provided with seal ring between the two.Balance gland 5 snares are on spool 2, the upper-end surface of its lower end surface and valve seat 3 connects, the circular bead surface 5a of balance gland 5 and the upper-end surface 2a of spool 2 (more than 3 or face) contact, have more than 3 on the balance gland 5, be preferably 3 through hole 5b, be used to use screw 6 that itself and valve seat 3 are fixed.Referring to Fig. 1, water outlet 7 connects firmly on valve seat 3, and (water outlet of existing water tap connects firmly on valve body, is communicated with the circulation road of valve seat through valve body again) is connected with the fluid passage of valve seat 3, valve body 1 snare is at balance gland 5 outer side surfaces, and its lower end surface contacts with valve seat 3 upper-end surfaces.Valve body 1 can adopt material such as plastics or pottery.Compared with prior art, this is novel to have following characteristics and advantage: 1, assembling back valve core stress equalization keeps the plane stressed, the valve long service life for a long time; 2, save the valve body outsourcing material of existing valve seat part, and valve body partly adopts nonmetallic material,, saved Master Cost, reduced manufacture cost as plastics etc.

Claims (4)

1, a kind of axis balance pressure type water tap comprises by valve core rod and controls the fluid passage, is the spool and the valve seat of column; Valve body; Water outlet is characterized in that, the diameter of described spool (2) is less than the diameter of valve seat (3); Also comprise balance gland (5); Balance gland (5) snare is on spool (2), its lower end surface contacts with the upper-end surface of valve seat (3), the circular bead surface (5a) of balance gland (5) contacts with the upper-end surface (2a) of spool (2), has the through hole more than 3 (5b) that is used to use screw (6) and valve seat (3) to fix on the balance gland (5).

2, axis balance pressure type water tap according to claim 1 is characterized in that, described water outlet (7) connects firmly on valve seat (3), is communicated with the fluid passage of valve seat (3); Described valve body (1) snare is at balance gland (5) outer side surface, and its lower end surface contacts with the upper-end surface of valve seat (3).

3, axis balance pressure type water tap according to claim 2 is characterized in that, described valve body (1) adopts plastic production.

4, according to claim 1 or 2 or 3 described axis balance pressure type water taps, it is characterized in that described balance gland (5) has 3 through holes (5b).

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