CN2282098Y

CN2282098Y - Low pressure starting air controlled change valve

Info

Publication number: CN2282098Y
Application number: CN 96207963
Authority: CN
Inventors: 李强; 丁艳坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-23
Filing date: 1996-04-23
Publication date: 1998-05-20
Anticipated expiration: 2006-04-23

Abstract

The utility model relates to a pneumatic operated directional valve, which can conduct normal work under the low pressure state (less than 0.2 mp< 0 >, larger than 0.05 mp< 0 >). The utility model applies to a pneumatic transmission system or a PSA air separation system and is composed of a main bar 4, transparent films on both ends, and blind films 5. The movement of the valve rod 4 is controlled via air for controlling the flow direction of the air and can be reset via the spring. The utility model has the advantages that the system with lower air pressure can be controlled and the manufacturing environment with poor air dust and contaminated oil mist can be adapted. The air passing through the utility model does not specific requirements.

Description

A kind of low voltage starting Pneumatic reversal valve

But the utility model is a kind of Pneumatic reversal valve of low voltage starting, can be applicable to Pneumatic Transmission and control, can make the control unit of cylinder moving commutation and the gas circuit control unit of each bed pressure change of realization pressure swing adsorption system especially.

At present, the pneumatic valve on the market of a great variety, but general complex structure, volume is big, price is expensive, and minimum startup is pressed generally at 0.2mp ₀About, otherwise with regard to cisco unity malfunction.The primary sealing area of general in addition pneumatic valve, generally all adopt to be slidingly matched, course of action can produce friction, wearing and tearing, and this just must require very high to the pressurized air that enters in the valve, as having lubricant mist in the pressurized air, higher to the air-filtering required precision simultaneously.Can stuck phenomenon occur because of dust enters unavoidably in actual the use, also just influence the reliability and the life-span of valve.Some systems uses valve not allow oil moisture content height in the gas, as oxygenerator etc., otherwise will bring irreversible pollution to absorbent module, therefore existing valve use very inconvenient.

The purpose of this utility model is the shortcoming that will overcome existing Pneumatic reversal valve, design a kind of the gas that enters to be need not lubricating oil filling mist, lower to the air-filtering required precision, but and the latus rectum Pneumatic reversal valve of low voltage starting, good reliability greatly.

But the utility model is achieved in that a kind of Pneumatic reversal valve of low voltage starting, form by main valve body 1, it is characterized in that, valve rod 4 is arranged in the gas distributing chamber 11, valve rod 4 has certain space with the wall of gas distributing chamber 11, and valve rod 4 one ends are embedded with diaphragm 6, and are connected with stifle 7 by spring 8, the other end of valve rod 4 is embedded with blind diaphragm 5, covers 3 in blind diaphragm 5 outer ends; Saturating diaphragm 6 links to each other with suction port 16.The pore 14 of saturating lid 3 links to each other with control gas C; There is air outlet 18 to link to each other on the valve with gas distributing chamber 11.

When suction port 16 had the input of P gas, gas entered suction chamber 12 by the hole on the saturating diaphragm 6, because the pressure that is subjected on the saturating diaphragm 6 is bigger, diaphragm 6 was pressed on the skew wall of gas distributing chamber 11, and gas can't enter gas distributing chamber 11; When the air hole 14 on the saturating lid 3 has control gas C to enter, because the pressure surface of being bullied of blind diaphragm 5 is long-pending long-pending greater than saturating diaphragm 6 pressure surface of being bullied, so that blind diaphragm 5 be pressed on the skew wall of gas distributing chamber 11, under the promotion of valve rod 4, saturating diaphragm 6 leaves gas distributing chamber's 11 1 segment distances, make this end of gas distributing chamber 11 form an air flue, P gas can enter gas distributing chamber 11 thus, and is discharged by air outlet 18.When not controlling gas, spring 8 returns to original position with valve rod 4.

The utility model can overcome existing Pneumatic reversal valve easy to wear, to shortcomings such as air-filtering required precision height, realize fricton-tight commutation, the utility model is simple in structure, volume is little, latus rectum is big, wide adaptability is safe and reliable, does not produce pollution.

Fig. 1, the utility model embodiment one schematic representation.

Fig. 2, the utility model embodiment two schematic representation.

Fig. 3, the utility model embodiment three schematic representation.

Embodiment one:

Bi-bit bi-pass normally close valve of the present utility model, form by main valve body 1, it is characterized in that, valve rod 4 is arranged in the gas distributing chamber 11, valve rod 4 has certain space with the wall of gas distributing chamber 11, valve rod 4 one ends are embedded with diaphragm 6, and saturating diaphragm 6 separates gas distributing chamber 11 with suction chamber 12, and saturating diaphragm 6 can be round diaphragm, its periphery is embedded in the main valve body 1, saturating diaphragm 6 centers are embedded on the valve rod 4, on the saturating diaphragm 6 air hole 13 are arranged, and saturating diaphragm 6 communicates with suction port 16; Between the termination of valve rod 4 and the stifle 7 spring 8 is arranged, the flexible ring washer 2 in the outside of stifle 7, the other end of main valve body has blind diaphragm 5 to be embedded on the valve rod 4, there is not pore on the blind diaphragm 5, blind diaphragm 5 outsides cover 3, there is spring flange 2 in saturating lid 3 outsides, and covering thoroughly has air hole 14 on 3, can link to each other with control source of the gas C; Air outlet 18 is arranged on the valve, link to each other with gas distributing chamber.

When the needs air inlet, control gas C enters control air chamber 15 by saturating lid 3 center holes 14, area is big because blind diaphragm 5 is bullied, blind diaphragm 5 is pressed on the skew wall of gas distributing chamber 11, when suction port 16 has the input of P gas, enter suction chamber 12 by the hole on the saturating diaphragm 6, owing to be subjected to the pressure of valve rod 4 ends bigger on the saturating diaphragm 6, diaphragm 6 is pressed on the skew wall of gas distributing chamber 11, and gas can't enter gas distributing chamber 11; When the air hole 14 on the saturating lid 3 has control gas to enter, because the pressure surface of being bullied of blind diaphragm 5 is long-pending long-pending greater than the saturating diaphragm pressure surface of being bullied, so that blind diaphragm 5 be pressed on the skew wall of gas distributing chamber 11, under the promotion of valve rod 4, saturating diaphragm 6 leaves gas distributing chamber's 11 1 segment distances, make this end of gas distributing chamber 11 form an air flue, P gas can enter gas distributing chamber 11 thus, discharges by having air outlet 18 again.

Embodiment two:

The two pneumatic normally close valves of film of two-position three way of the present utility model, as shown in Figure 2, its structure and embodiment's one difference is that many air outlet O are connected with an end of gas distributing chamber 11 on main valve body 1.

Embodiment three:

Double air controlled three position five-way valve of the present utility model is to be combined by two two-position three-way valves, as shown in the figure 3, and auxiliary valve body 9 constitutes inlet hole P.A, B are air outlet hole, and O is the air outlet.C, E are the control gas port.

Claims

But 1, a kind of low voltage starting Pneumatic reversal valve, form by main valve body 1, it is characterized in that: valve rod 4 is arranged in the gas distributing chamber 11, valve rod 4 has certain space with the wall of gas distributing chamber 11, valve rod 4 one ends are embedded with diaphragm 6, and be connected with stifle 7 by spring 8, the other end of valve rod 4 is embedded with blind diaphragm 5, covers 3 in blind diaphragm 5 outer ends; Saturating diaphragm 6 links to each other with suction port 16; The pore 14 of saturating lid 3 links to each other with control gas B; There is air outlet 18 to link to each other on the valve with gas distributing chamber 11.
But 2, low voltage starting Pneumatic reversal valve according to claim 1 is characterized in that: what link to each other with gas distributing chamber 11 has 2 air outlets.
3, low voltage starting Pneumatic reversal valve according to claim 1 and 2 is characterized in that: can form twin-channel Pneumatic reversal valve by 2 groups of valve rods, saturating diaphragm, blind diaphragm.