CN202955300U

CN202955300U - Diaphragm-type breather valve

Info

Publication number: CN202955300U
Application number: CN 201220612095
Authority: CN
Inventors: 罗献尧; 杨华锋; 韩硕
Original assignee: ZHEJIANG AILIPU PUMP CO Ltd
Current assignee: ZHEJIANG AILIPU TECHNOLOGY CO., LTD.
Priority date: 2012-11-19
Filing date: 2012-11-19
Publication date: 2013-05-29
Anticipated expiration: 2022-11-19

Abstract

The utility model belongs to the field of valves, and particularly relates to a diaphragm-type breather valve. The diaphragm-type breather valve comprises a valve shell, a valve core and a diaphragm sheet. The diaphragm-type breather valve is characterized in that the valve core is matched with the valve shell in a screwing way; the diaphragm sheet is arranged at a part where the valve core is connected with the valve shell; a through hole is arranged at the middle part of the valve core; a concave groove is arranged between the through hole and the external wall of the valve core; a plurality of first pores are arranged on the diaphragm sheet which corresponds to a sunken part of the concave groove; and a plurality of second pores are also arranged around the bottom of the valve housing. The diaphragm-type breather valve is mainly arranged at the bottom of a control cabinet; the control cabinet is a sealed space; when equipment in the control cabinet is started, the air pressure is higher than outside atmospheric pressure, so the diaphragm sheet is forcibly separated from the valve core so as to achieve the balance of the internal air pressure and the external air pressure; when the equipment stops is working, the internal air is contracted, and the certain negative pressure is generated relative to the outside atmospheric pressure, and the diagraph sheet is forcibly inwards sunken by the outside atmospheric pressure so as to achieve the seal together with the lower end surface of the through hole at the middle part of the valve core, and as a result, outside gas cannot flow in.

Description

A kind of diaphragm type inhalation valve

Technical field

The utility model belongs to valve field, is specially a kind of diaphragm type inhalation valve.

Background technique

In industries such as medicine, chemical industry, many device interiors all need to fill the accurate control instruments such as integrated circuit board and come production control technique.Particularity and complexity due to the environment at its place, many environment be all acid or alkalescence and moist gas large especially, tolerance range considerably beyond control instrument, accurate control instrument must be arranged in an airtight control cabinet with the contacting of isolated and ambient atmosphere, otherwise the damage of pulling up a horse within very short time.Simultaneously because many equipment are wanted self to produce heat in use, a large amount of condensed waters can be produced on the wall of seal container, if do not eliminate, the serious consequence that the accurate control instrument such as integrated circuit board burns will be produced.The solution of market popularity is, with the material of confined space container with the good plastics of heat-shielding performance or in confined space container periphery with the good material parcel of the heat-shielding performancies such as asbestos, this scheme has great drawback in fact: any electronic component has pair temperature that certain using scope is arranged, and will greatly affect its working life or cannot use at all if surpass its temperature use.Because electronic component and equipment all can produce heat in using process, but the external world's loose not going out again causes temperature rise to be risen, and during to certain value, what have will produce the serious consequence of directly burning when temperature rise.Therefore many producers have to adopt the electronic component of the higher import of heatproof or controller are moved on to the outside, workshop, have improved greatly user cost; Simultaneously can increase user's user cost undoubtedly like this, also can make producer lose competitive ability.

The model utility content

For problems of the prior art, the purpose of this utility model is to provide a kind of technological scheme of diaphragm type inhalation valve.

Described a kind of diaphragm type inhalation valve, comprise valve casing, spool and diaphragm, it is characterized in that described spool and valve casing threaded, diaphragm is arranged on the joint of spool and valve casing, the spool middle part arranges through hole, between through hole and spool outer wall, groove is set, on the diaphragm corresponding with the depression position of groove, a plurality of the first apertures is set, in valve casing bottom surrounding, a plurality of second orifices are set also.

Described a kind of diaphragm type inhalation valve is characterized in that the middle part of described diaphragm matches with the lower end surface of spool middle through-hole.

Described a kind of diaphragm type inhalation valve is characterized in that the lower end surface of described spool middle through-hole is lower than the spool lower end surface.

Diaphragm type inhalation valve of the present utility model mainly is arranged on the bottom of control cabinet, and control cabinet is a confined space, and circuit board or accurate control instrument are arranged on its inside; During opening of device in control cabinet, can produce heat, heat expands internal gas, and air pressure can force diaphragm to separate with spool higher than external pressure, and internal gas discharges a part by the bottom inhalation valve, to reach inside and outside air pressure balance; Internal heat air and control cabinet wall contacted position can produce condensed water again, and condensed water is also discharged by inhalation valve; When equipment quit work, after certain hour, the inside and outside temperature of control cabinet was identical, internal gas shrinks, and at this moment external pressure is certain negative air pressure relatively, and external atmosphere pressure forces diaphragm to cave in, realize sealing with the lower end surface of spool middle through-hole, extraneous gas can't enter.

Description of drawings

Fig. 1 is the utility model sectional structure schematic diagram;

Fig. 2 is in device start, cross-sectional view of the present utility model;

Fig. 3 is after equipment stops, cross-sectional view of the present utility model;

In figure: the 1-valve casing; The 2-spool; The 3-diaphragm; 4-the first aperture; The 5-second orifice; The 6-groove; The 7-through hole; The 8-control cabinet.

Embodiment

Below in conjunction with Figure of description, the utility model is described further:

A kind of diaphragm type inhalation valve, as Fig. 1, this inhalation valve and control cabinet 8 are used in conjunction with, comprise valve casing 1, spool 2 and diaphragm 3, spool 2 and valve casing 1 threaded, diaphragm 3 is arranged on the joint of spool 2 and valve casing 1, spool 2 middle parts arrange through hole 7, between through hole 7 and spool 2 outer walls, groove 6 is set, on the diaphragm corresponding with the depression position of groove 6, a plurality of the first apertures 4 are set, in valve casing 1 bottom surrounding, a plurality of second orifices 5 are set also, through hole, the first aperture and second orifice coordinate the discharge that realizes the interior gas of control cabinet and liquid.

Matching with the lower end surface of spool 2 middle through-holes in the middle part of diaphragm 3, realizes opening and closure of inhalation valve.In order to coordinate the work of diaphragm, the lower end surface of spool middle through-hole should spool the lower end surface so that the enough strokes of diaphragm.

Working procedure: when the work of the device start inside control cabinet (as Fig. 2), can produce heat, heat expands internal gas, air pressure is higher than external pressure, can force the outside flexing of diaphragm, the first aperture that air in control cabinet and condensed water arrange from diaphragm by the spool middle through-hole flows into bottom valve casing, and the second orifice from valve casing bottom setting flows out extraneous at last; When the equipment inside control cabinet quits work (as Fig. 3), after certain hour, the inside and outside temperature of control cabinet is identical, internal gas shrinks, at this moment external pressure is certain negative air pressure relatively, external atmosphere pressure forces diaphragm to cave in, and realizes sealing with the lower end surface of spool middle through-hole, and extraneous gas can't enter.

Claims

1. diaphragm type inhalation valve, comprise valve casing, spool and diaphragm, it is characterized in that described spool and valve casing threaded, diaphragm is arranged on the joint of spool and valve casing, the spool middle part arranges through hole, between through hole and spool outer wall, groove is set, on the diaphragm corresponding with the depression position of groove, a plurality of the first apertures is set, in valve casing bottom surrounding, a plurality of second orifices are set also.

2. a kind of diaphragm type inhalation valve according to claim 1 is characterized in that the middle part of described diaphragm matches with the lower end surface of spool middle through-hole.

3. a kind of diaphragm type inhalation valve according to claim 1 and 2, is characterized in that the lower end surface of described spool middle through-hole is lower than the spool lower end surface.