CN2806917Y

CN2806917Y - Differential pressure drive valve

Info

Publication number: CN2806917Y
Application number: CN 200520111241
Authority: CN
Inventors: 郑英华; 王枰
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-10
Filing date: 2005-06-10
Publication date: 2006-08-16
Anticipated expiration: 2015-06-10

Abstract

The utility model relates to a differential pressure driving valve and an automatic valve, particularly to a leakage-proof control valve which can automatically add the accumulated minute flow into metering reading when the fluid flow is less than the metered starting flow. The utility model comprises an inflow opening, an outflow opening, a valve body, a valve core, a soft spacer connected with the lower end of the valve core, a lower diaphragm plate, a lower diaphragm spring, a bushing sheathed on a valve chamber and kept with a certain longitudinal gap to the valve core, a lower diaphragm small hole, a valve chamber through hole, a leading hole, an end cover, a fastener and a pipeline connecting mechanism. The utility model is characterized in that the upper part of a valve cavity is provided with the valve core made of the magnetic conductive materials and the soft spacer connected with the valve core to open an upper diaphragm on the leading hole, the lower plane of the valve core is connected or integrated with a permanent magnet, an upper diaphragm spring arranged on the lower part of the valve core is squeezed to move up and down to make the permanent magnet attract upwards when the pressure difference reaches a certain value, and the valve core is provided with a valve core spring used for pushing and pressing the soft spacer to seal the leading hole. The utility model can be used for leakage-proof facilities of various fluid pipelines.

Description

The pressure differential valve

Technical field.The utility model relates to a kind of automatic valve, particularly when fluid flow during less than the initiating flow of measurement instrument, still tiny flow quantity can be included automatically in the leakage-proof control valve of metering reading after accumulating.

Background technique.Because existing liquid meter utensil can't measure the micro-flow that forms because of water clock, cause various liquid to run off and unnecessary consumption as the assets of supply management departments such as oil, water, for this reason, Chinese patent application such as application number be 200320105139.X's " leakage-proof control valve " a solution has been proposed, this is the valve that directly prevents water clock, this design is because the structure more complicated stays unfavorable factor unavoidably in cost, enforcement and popularization.

Summary of the invention.The purpose of this utility model provides pressure difference that a kind of simple in structure, reliable operation, the accumulation that utilizes water clock liquid with low cost, that be convenient to promote cause and drives valve and form the pressure differential valve that measurable flow carries out automatic discontinuous metering.

The utility model is so to realize: the pressure differential valve comprises inflow port, go out head piece, valve body, spool, be connected in the soft gasket of spool lower end, the lower diaphragm plate sheet of control head piece, the lower diaphragm plate spring, be set on the valve chamber and and keep the sleeve pipe of certain axial clearance with spool, the lower diaphragm plate aperture, the valve chamber through hole, pilot hole, end cap, fastening piece, and pipeline bindiny mechanism, it is characterized in that valve pocket top is equipped with its lower plane and is connected with permanent magnet or makes one, extruding is loaded on last barrier film spring it under and moves down and make permanent magnet upwards attract the spool made with permeability magnetic material and connected soft gasket to open the last diaphragm of pilot hole when pressure reduction reaches certain value, is equipped with one in order to push the valve core spring of soft gasket shutoff pilot hole on the spool of valve chamber inherence.

For preventing that foreign material from stopping up the lower diaphragm plate aperture, in aperture, be inserted with one be fixed in make on the lower diaphragm plate spring or with it one and with its flexible can be in aperture the anti-blocking pin of free lifting.

The all available non-corrosive material of above-mentioned spring is made.

In sum, the utility model be utilize water clock liquid form and finally reach the pressure difference of certain value gradually, automatically drive valve, can realize of the automatic supervision metering of various fluid pipelines to water clock, reliable operation, simple in structure, with low cost, product is small and exquisite, helps the leakage-proof transformation of various fluid pipelines.

Description of drawings.Accompanying drawing is a cross-sectional schematic of the present utility model.

As shown in the figure: 1, inflow port 2, valve body 3, lower diaphragm plate sheet 4, lower diaphragm plate aperture 5, anti-blocking pin 6, lower diaphragm plate spring 7, valve chamber through hole 8, pilot hole 9, soft gasket 10, spool 11, valve core spring 12, go up diaphragm 13, permanent magnet 14, sleeve pipe 15, end cap 16, go up barrier film spring 17, go out head piece

Embodiment.As shown in the figure, the pressure differential valve comprises inflow port 1, go out head piece 17, valve body 2, irony spool 10 and the soft gasket 9 that is adhered to its lower end, lower diaphragm plate sheet 3, lower diaphragm plate spring 6, be set on the valve chamber and and keep the sleeve pipe 14 of certain axial clearance with spool 10, lower diaphragm plate aperture 4, valve chamber through hole 7, pilot hole 8, end cap 15, fastening piece, and pipeline bindiny mechanism, it is bonding or make one to it is characterized in that its lower plane and permanent magnet 13 are equipped with in valve pocket top, extruding is loaded on last barrier film spring 16 it under and moves down and make permanent magnet 13 upwards attract irony spool 10 to open the last diaphragm 12 of pilot hole 8 when up and down both sides pressure reduction reaches certain value, is equipped with one in order to push the valve core spring 11 of soft gasket 9 shutoff pilot holes 8 on the spool 10 of valve chamber inherence.

For preventing that foreign material from stopping up lower diaphragm plate aperture 4, in the hole, be inserted with one with lower diaphragm plate spring 6 make one and with its stretch can be in aperture the anti-blocking pin 5 of free lifting.

When going out head piece 17 and the liquid water clock occurs, last diaphragm 12 bottom valve pocket hydraulic pressure descend along with the loss of liquid, beginning forms pressure difference with the hydraulic pressure of last diaphragm 12 top valve pockets, when this pressure difference reaches certain value with the continuation of water clock, it is descending just to promote to go up diaphragm 12, until permanent magnet 13 conflict sleeve pipes 14 and upwards attract irony spool 10 and bonding resilient pad 9 on it, so open pilot hole 8, tapping, former pressure reduction disappears.In this moment, entrance point relies on higher liquid supply pressure, upwards pushing tow lower diaphragm plate sheet 3 is opened the liquid stream that head piece forms greater than measurement instrument initiating flow and is tended to balance until inlet/outlet two ends hydraulic pressure, like this, the drop trace is leaked still included in metering reading after accumulation.At this moment, last diaphragm 12 is under the pushing tow of last barrier film spring 16, permanent magnet 13 breaks away from the rising of attraction back with irony spool 10 and resets, spool 10 also drops to original position in the pushing of valve core spring 11 simultaneously, equally, lower diaphragm plate sheet 3 resets under the effect of lower diaphragm plate spring 6 and seals head piece, as long as the outlet end pipeline still has water clock, the utility model will be supervised metering to it automatically just like above-mentioned.

Claims

1, the pressure differential valve comprises inflow port [1], go out head piece [17], valve body [2], spool [10], be connected in the soft gasket [9] of spool lower end, the lower diaphragm plate sheet [3] of control head piece, lower diaphragm plate flat spring [6], be set on the valve chamber and and keep the sleeve pipe [14] of certain axial clearance with spool [10], lower diaphragm plate aperture [4], valve chamber through hole [7], pilot hole [8], end cap [15], fastening piece and pipeline bindiny mechanism, it is characterized in that valve pocket top is equipped with its lower plane and is connected with permanent magnet [13] or makes one, extruding is loaded on last barrier film spring [16] it under and moves down and make permanent magnet [13] upwards attract the spool [10] made with permeability magnetic material and connected soft gasket [9] to open the last diaphragm [12] of pilot hole [8] when pressure reduction reaches certain value, is equipped with one on the valve chamber inherence spool [10] in order to push the valve core spring [11] of soft gasket [9] shutoff pilot hole [8].

2, pressure differential valve according to claim 1, it is characterized in that in lower diaphragm plate aperture [4], being inserted with one be fixed in that lower diaphragm plate spring [6] is gone up or make one with it and with its flexible can be in aperture the anti-blocking pin [5] of free lifting.