CN205781161U

CN205781161U - Stepless air relief valve

Info

Publication number: CN205781161U
Application number: CN201620042838.1U
Authority: CN
Inventors: 王景熙
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-16
Filing date: 2016-01-16
Publication date: 2016-12-07
Anticipated expiration: 2026-01-16

Abstract

Stepless air relief valve, valve seat it is provided with in valve body, equipped with the piston with its matched in clearance in valve seat, connect on valve body and have fairlead, fairlead lower end couples end cap, and the lower end of piston extends in fairlead, through there being the push rod with its threaded engagement on end cap, fairlead is built with spring, and the lower end of spring is close with the lower end of piston by the upper end bearing of push rod, upper end.When this stepless air relief valve uses in water system, when spring is in non-compressed state at present, the ratio of decompression is certain value；After rotation push rod makes the two ends of spring be oppressed, being further continued for rotating push rod, the pressure of piston is gradually increased by spring, and the hydraulic pressure of the outlet of this stepless air relief valve then can be gradually increased, and was both gradually increased by compression degree along with spring, and Pressure reducing ratio regular meeting is gradually reduced.Visible, the step-less adjustment of decompression ratio can be realized by regulation push rod.

Description

Stepless air relief valve

Technical field

This utility model relates to the air relief valve in water system.

Background technology

The structure of existing a kind of air relief valve in water system is mainly: be provided with the valve seat matched in clearance of a piston, piston and valve inner in valve body.This air relief valve is to realize certainty ratio decompression by the compression face product moment of piston self, the shortcoming that it exists is: each air relief valve can only realize decompression in a ratio determined, and in water system, often require that multi-step pressure reduction, use above-mentioned air relief valve for reaching multi-step pressure reduction, need to use multiple air relief valve to combine, thus, increase use cost first, second increase installation, the complexity used.

Utility model content

The purpose of this utility model is to provide a kind of stepless air relief valve, and it can realize the ratio of certainty ratio decompression and decompression again can step-less adjustment to a certain extent.

For achieving the above object, this utility model employing below scheme: stepless air relief valve, being provided with valve seat in valve body, equipped with the piston with its matched in clearance in valve seat, body base connects the fairlead parallel with piston axis, fairlead lower end couples end cap, the lower end of piston extends in fairlead, and through there being the push rod with its threaded engagement on end cap, fairlead is built with spring, the lower end of spring is by the upper end bearing of push rod, and the upper end of spring is close with the lower end of piston.

The stepless air relief valve that this utility model provides is when using in water system, and, the ratio of decompression is born the difference in areas of pressure by piston self and determined and be certain value at spring in the on-compressed state；When needing to regulate decompression ratio, after rotation push rod makes the two ends of spring be oppressed, it is further continued for rotating push rod, along with spring is gradually further compressed, the pressure of piston is gradually increased by spring, the hydraulic pressure of the outlet of this stepless air relief valve then can be gradually increased, and was both gradually increased by compression degree along with spring, and Pressure reducing ratio regular meeting is gradually reduced.As can be seen here, the step-less adjustment of decompression ratio can be realized by regulation push rod.

This utility model is rational in infrastructure, dependable performance, and it is easy to adjust, accurate, and range of accommodation is relatively big, and it both can ensure that pressure of supply water, can save again pressure regulation cost.

Accompanying drawing explanation

Fig. 1 is the structure chart of this utility model one embodiment；

Fig. 2 is the A portion enlarged drawing of Fig. 1；

Fig. 3 is the B portion enlarged drawing of Fig. 1.

Detailed description of the invention

This utility model is further illustrated below in conjunction with embodiment and accompanying drawing.

See Fig. 1

It is provided with valve seat 4 in the valve body 1 of the stepless air relief valve that this utility model provides, water inlet 1a and outlet 1b is had on valve body 1, equipped with the piston 2 with its matched in clearance in valve seat 4, connect bottom valve body 1 and have the fairlead 5 parallel with piston 2 axis, fairlead 5 and the axis coaxle of piston 2 in the present embodiment, fairlead 5 lower end couples end cap 12, the lower end of piston 2 extends in fairlead 5, through there being the push rod 11 with its threaded engagement on end cap 12, fairlead 5 is built with spring 7, the lower end of spring 7 is by the upper end bearing of push rod 11, the upper end of spring 7 is close with the lower end of piston 2.

See Fig. 1, Fig. 3

In the present embodiment, the lower end of spring 7 is enclosed within a lower spring cup 8, the bottom of lower spring cup 8 has counterbore 8a, the upper end of push rod 11 stretches in counterbore 8a, counterbore 8a is provided with a steel ball 9, steel ball 9 and push rod 11 and lower spring cup 8 against, the lower end of piston 2 is enclosed within upper spring seat 6 equipped with a upper spring seat 6, the upper end of spring 7.It addition, push rod 11 is positioned on the position outside end cap 12 equipped with nut 10.Can be by push rod 11 tightening by nut 10.

See Fig. 1, Fig. 2

In the present embodiment, in the outside of valve seat 4 upper end equipped with an axle sleeve 3, the inwall of axle sleeve 3 circumferentially has a groove 3a, axle sleeve 3 is evenly distributed one group of osculum 3b communicated with groove 3a, having one group of through hole 4a on the upper end of valve seat 4, through hole 4a communicates with groove 3a.When by the situation that current are low discharge of this stepless air relief valve, at spring 7 in the on-compressed state, the outlet of valve seat 4 upper end can be closed by the upper end of piston 2, now, current by water inlet 1a enter, from through hole 4a and osculum 3b by, discharged by outlet 1b, this stepless air relief valve, under the situation of low discharge, remains able to stablize, reduce pressure reliably.

As seen from Figure 1, when this stepless air relief valve uses in water system, when spring 7 is in non-compressed state, piston 2 is issued to balance in the hydraulic pressure effect of water inlet 1a and outlet 1b, it reduces pressure by certainty ratio, the difference in areas that the ratio of its decompression self is born pressure by piston 2 determines, now, two kinds of situations are had by the trend of the current of this stepless air relief valve, a kind of is in the case of the flow of current is normal, the outlet of valve seat 4 upper end is opened, current are entered by water inlet 1a, pass through from the outlet of valve seat 4 upper end, discharged by outlet 1b, another kind is in the case of the flow of current is less, the outlet of valve seat 4 upper end is closed by piston 2 upper end, current are entered by water inlet 1a, pass through from through hole 4a and osculum 3b, discharged by outlet.When needing the hydraulic pressure adjusting mouth of a river 1b, rotate push rod 11 to be compressed by spring 7, piston 2 rises, piston 2 is issued to new balance in the hydraulic pressure effect of hydraulic pressure, the pressure of spring 7 and the outlet 1b of water inlet 1a, the hydraulic pressure of outlet 1b then increases, if continuing to rotate push rod 11, along with spring 7 is further compressed, the pressure of piston 2 is gradually increased by spring 7, the hydraulic pressure of outlet 1b then can be gradually increased, both gradually being increased by compression degree along with spring 7, the hydraulic pressure of outlet 1b can be gradually increased, and Pressure reducing ratio regular meeting is gradually reduced.As can be seen here, the step-less adjustment of decompression ratio can be realized by regulation push rod.

Claims

The most stepless air relief valve, valve seat it is provided with in valve body, equipped with the piston with its matched in clearance in valve seat, body base connects the fairlead parallel with piston axis, and fairlead lower end couples end cap, the lower end of piston extends in fairlead, through there being the push rod with its threaded engagement on end cap, fairlead is built with spring, and the lower end of spring is by the upper end bearing of push rod, the upper end of spring is close with the lower end of piston, it is characterised in that:

The lower end of spring is enclosed within a lower spring cup, and the bottom of lower spring cup has counterbore, and the upper end of push rod stretches in counterbore, counterbore is provided with a steel ball, steel ball and push rod and lower spring cup against, the lower end of piston is enclosed within upper spring seat equipped with a upper spring seat, the upper end of spring.
Stepless air relief valve the most according to claim 1, it is characterized in that: in the outside of valve seat upper end equipped with an axle sleeve, a groove is circumferentially had on the inwall of axle sleeve, one group of osculum communicated with groove it is evenly distributed on axle sleeve, having one group of through hole on the upper end of valve seat, through hole communicates with groove.