CN201087769Y

CN201087769Y - Unloading valve

Info

Publication number: CN201087769Y
Application number: CNU2007201419164U
Authority: CN
Inventors: 杨国灿; 石晓峰
Original assignee: ZHEJIANG ZHONGBAO AUTO-CONTROL COMPONENT Co Ltd
Current assignee: ZHEJIANG ZHONGBAO AUTO-CONTROL COMPONENT Co Ltd
Priority date: 2007-03-17
Filing date: 2007-03-17
Publication date: 2008-07-16
Anticipated expiration: 2017-03-17

Abstract

The utility model relates to an unloading valve, which is arranged in an air-condition to play a role of overvoltage protection. The utility model comprises a valve body, a membrane fixed seat, a membrane, a regulating cylinder, etc., wherein, the valve body comprises an inner cavity inside which a valve core is arranged; the regulating cylinder is provided with the inner cavity, a pressure regulating spring is arranged in the inner cavity, and the pressure regulating spring is fixed on the upper part of the valve body. The regulating cylinder is of a T-shaped thin-walled cylinder formed by drawing metal materials, and a disk at the lower end forms a direct butt welding with the membrane and the membrane fixed seat into a whole. The inner cavity of the valve body and the inner cavity of the regulating cylinder are sealed and separated by a middle membrane. The utility model has the advantages of reversely simple structure, small volume and easy manufacture.

Description

A kind of unloading valve

Affiliated technical field

The utility model relates to a kind of unloading valve, and the pressure that particularly relates to overvoltage protection in the air conditioner is regulated unloading valve.

Background technique

At present its structure of overvoltage protection unloading valve of generally using in the air conditioner for up and down two ones be welded, top is the spring pressure adjusting portion, the bottom is that valve body opens and closes relief portion, the centre is provided with that circular stainless steel diaphragm is separated, upper and lower two ones of sealing.Pressure regulating Unloading valve of air conditioner as the model utility of notice of authorization CN2592995Y just belongs to this structure, and the unloading valve of this structure has a valve body, be welded with the diaphragm lower fixed seat on the valve body, spool is housed in the valve body, when valve off-load spool is opened, secondary spring also is housed for spool is lifted; Be provided with spring pressure on valve body top and regulate tube, in Regulation spring etc. is housed, regulate a tube bottom and be welded with the diaphragm upper fixed seat, diaphragm just is arranged in the middle of the upper and lower fixed base back and tightly integrally welded with argon arc welding etc.

The unloading valve of above structure, must design has the upper and lower fixed base of diaphragm, and upper fixed seat is welded into one with soldering etc. again with regulating tube, and regulates tube and process with turning such as brass bars, and structure, technology are complicated, the cost height; Secondly, because of considering the force intensity that is subjected to of brass, the profile of regulating tube is bigger.

Summary of the invention

The utility model is developed in view of overcoming the above problems, and its purpose is to provide a kind of overall structure simple, and overall volume is less relatively, makes easily and the low unloading valve of cost.

For achieving the above object, unloading valve of the present utility model includes a valve body, and valve body connects inlet tube and outer pipe, and spool is installed in the valve body, and spool has secondary spring, is connected with a diaphragm fixed base on valve body; Be connected with diaphragm on the diaphragm fixed base, regulate tube; Regulate in the tube pressure adjusting spring is installed, the top plug is arranged under the pressure adjusting spring, upper and lower and the top plug and spool of diaphragm contact, it is characterized in that: regulate tube and draw the thin-walled cylinder that forms for metallic material, its lower end disk directly with diaphragm cylindrical, fixed base to being welded into one, middle diaphragm is body cavity and adjusting tube inner chamber sealed separation.

As the embodiment of the utility model unloading valve, regulate tube and form for stainless steel materials draws.

As the embodiment of the utility model unloading valve, it is "T"-shaped to draw the adjusting tube that forms at described metallic material, and the external diameter with the vertical disk external diameter of cylindrical shell shaft axis and diaphragm fixed base, diaphragm of lower end is consistent.

As the embodiment of the utility model unloading valve, regulating tube lower end and diaphragm, fixed base butt welding is argon arc welding or plasma welding.

Because above structure has been cancelled former independent upper fixed seat, former upper fixed seat and adjusting tube are made of one and form with the sheet metal drawing, so structure is simple relatively; Draw the thin-walled cylinder that forms owing to regulate tube for metallic material again, therefore, volume is less, low cost of manufacture.

Description of drawings

Fig. 1 is a unloading valve embodiment longitudinal section of the present utility model;

Fig. 2 is a sectional view of regulating tube embodiment of the present utility model;

Embodiment

Describe the embodiment of the utility model unloading valve below with reference to the accompanying drawings in detail.Fig. 1 is the utility model unloading valve embodiment's a longitudinal section, because the unloading valve of illustrated embodiment is to be contained in the refrigerant circulation such as air conditioner to use, therefore, it is provided with valve body 10, valve body is connected with inlet tube 12, outer pipe 11, so that link to each other with the air-conditioning system pipeline, valve body has outflow opening 10b, inflow entrance 10a; Described valve body 10 is made of metals such as brass, is shaped on spring groove 10c in valve body 10, is welded with diaphragm fixed base 13 on the top of valve body 10.

Spool 40 is located at the inner chamber of valve body 10, is axle class shape, and the most handy stainless steel material turning forms, and spool 40 is connected with baffle plate 42, but also spool 40 and baffle plate 42 can be made one, and when guaranteeing that valve is opened, spool moves up and is provided with secondary spring 41; Secondary spring 41 upper ends engage with baffle plate 42, and the lower end is installed among the spring groove 10c.

The adjusting tube 20 of "T"-shaped shape is located at the top of valve body 10, and it draws, processes with corrosion resistant plate, and the external diameter of regulating tube 20 lower ends and cylindrical shell shaft axis vertical disk 20b external diameter and diaphragm fixed base, diaphragm is consistent.Regulate in tube 20 upper ends and be provided with the adjusting nut 21 that is shaped on internal thread, adjusting nut 21 and adjusting tube available welding in 20 upper ends or riveted fixing are equipped with screw 22 in the internal thread at adjusting nut 21 middle parts, and rotary screw 22 can be along nut 21 upper and lower moving; The inner chamber 20a that regulates in the tube 20 is equipped with pressure adjusting spring 24, the upper end of pressure adjusting spring 24 is connected with screw 22 ends by spring fixed seat 23, the lower end of pressure adjusting spring 24 is provided with spring fixed seat 25, top plug 26, top plug 26 is a disc, external diameter cooperates with adjusting tube 20 internal diameters, plug 26 upper ends, top contact with spring fixed seat 25 lower end surfaces by steel ball 27, so that pressure adjusting spring 24 elastic force are concentrated the plug center, top that reaches by steel ball.

Diaphragm 30 forms through cold stamping for Stainless Steel Band, be installed in the middle of diaphragm fixed base 13 and the adjusting tube 20 lower end disk 20a, to being welded into one, the centre is opened body cavity 10d by diaphragm 30 with adjusting tube inner chamber 20a sealed separation with argon arc welding by diaphragm fixed base 13, diaphragm 30, the also tight back of adjusting tube 20 lower end disk 20b outer peripheral surfaces; The upper and lower of diaphragm 30 contacts with top plug 26 and spool 40 respectively.

The working principle of this unloading valve in the air-conditioner hose system is such, unloading valve inlet tube 12 joins with the air conditioner pressure duct, outer pipe 11 joins with the air conditioner low pressure line, is full of high-pressure liquid in the body cavity 10d, and the inner chamber 20a that regulates in the tube 20 communicates with atmosphere.Under the normal condition, high-pressure liquid arrives the diaphragm fixed base 13 through spring groove 10c from inlet tube 12, and act on diaphragm 30, its axial pressure and secondary spring 41 that acts on diaphragm 30 generations makes progress making a concerted effort less than the setting elastic force of pressure adjusting spring 24 of elastic force by baffle plate 42, and it is that unloading valve is in closed condition that the valve port 40a of spool 40 lower end mouth contacts with outflow opening 10b on the valve body 10.When air conditioner pressure duct internal pressure unusual, when being higher than limit value, it acts on the setting elastic force of the axial pressure of diaphragm 30 generations greater than pressure adjusting spring 24 body cavity 10d mesohigh fluid, make diaphragm 30 to top offset, secondary spring 41 drives spools 40 and moves on axially, it is the valve open mode that the valve port 40a of spool 40 lower end mouth separates with outflow opening 10b on the valve body 10, abnormal pressure fluid in the air conditioner pressure duct is by inflow entrance 10a, outflow opening 10b flow to the air conditioner low pressure line, reach the purpose of off-load, after system pressure in the air conditioner high pressure road reduces, under the elastic force effect of pressure adjusting spring 24, unloading valve is salty newly closes, and finishes an off-load circulation.Unloading valve circulates so repeatedly, makes air-conditioning system keep normal operation.

Claims

1. a unloading valve includes a valve body (10), and valve body (10) connects inlet tube (12) and outer pipe (11), and spool (40) is installed in the valve body, and spool has secondary spring (41), is connected with a diaphragm fixed base (13) on valve body (10); Be connected with diaphragm (30) on the diaphragm fixed base (13), regulate tube (20), regulate in the tube pressure adjusting spring (24) is installed, top plug (26) is arranged under the pressure adjusting spring, upper and lower and the top plug (26) and spool (40) of diaphragm (30) contact, it is characterized in that: regulate tube (20) and draw the thin-walled cylinder that forms for metallic material, its lower end disk directly with diaphragm (30), fixed base (13) to being welded into one, middle diaphragm (30) is body cavity and adjusting tube inner chamber sealed separation.

2. unloading valve according to claim 1 is characterized in that: regulate tube (20) and form for stainless steel materials draws.

3. unloading valve according to claim 1 is characterized in that: it is "T"-shaped that metallic material draws the adjusting tube (20) form, and the external diameter with the vertical disk of cylindrical shell shaft axis (20b) external diameter and diaphragm fixed base (13), diaphragm (30) of lower end is consistent.

4. unloading valve according to claim 1 and 2 is characterized in that: adjusting tube (20) lower end and diaphragm (30), fixed base (13) butt welding are argon arc welding or plasma welding.