CN201396474Y

CN201396474Y - Normal-closed electromagnetic valve

Info

Publication number: CN201396474Y
Application number: CN2009201198334U
Authority: CN
Inventors: 刘永斌; 方云
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-10
Filing date: 2009-05-10
Publication date: 2010-02-03
Anticipated expiration: 2019-05-10

Abstract

A normal-closed electromagnetic valve for refrigeration system, compressor control system and boiler water supply and drainage system comprises a valve body, a valve cover, an upper stable iron core,a lower movable iron core, a coil and a shell; wherein a membrane component is provided in the valve port to separate the valve body into an upper gas chamber and a lower gas chamber, an upper stableiron core is fixed in the middle upper part of a magnetic insulation sleeve, a magnetic core sleeve is provided under the upper stable iron core, a lower movable iron core is provided in the magneticcore sleeve, the lower movable iron core is provided with a diversion outlet, the inner diameter of the diversion outlet has large upper part and small lower part, the return spring is provided in theupper part of the diversion hole, the upper end of the return spring is abutted in the hole at the middle part of the lower face of the upper stable iron core, the lower end of the lower movable ironcore is provided with an adjusting spring, an adjusting gasket is provided under the adjusting gasket, a retaining gasket is clamped at the lower port of the magnetic core sleeve, the magnetic insulation sleeve is provided in the valve cover via nuts, and the valve cover is fixed on the valve body. The normal-closed electromagnetic valve has reasonable structure design and good close property ofthe valve port to prevent leakage completely.

Description

The normal close type solenoid valve

Technical field

The utility model relates to a kind of solenoid valve, refers in particular to a kind of normal close type solenoid valve that is used for refrigeration system, compressor control system and boiler supply and drain water system etc.

Background technique

Chinese patent once disclosed a kind of " novel direct action solenoid valve " (China that is used for refrigeration system, publication number CN2743635Y, open day on November 30th, 2005), it comprises sleeve pipe, be connected on the sleeve pipe, the coil of bottom and valve seat, shutoff is at the end socket of sleeve pipe upper end and the core iron that is positioned at sleeve pipe, the bottom that it is characterized in that described valve seat has at least one axial refrigerant import, the valve seat place that is positioned at the core iron below has a refrigerant exit, there is a sealing plug that cooperates with refrigerant exit the lower end of core iron, and refrigerant advances, form a valve port between the top of outlet and core iron.It is no adapter type, and it is more simple, convenient that installation, dismounting and maintenance become.But its structural design is unreasonable, and closing property of valve port is not good enough.

The model utility content

The purpose of this utility model is to provide a kind of normal close type solenoid valve, its reasonable in design, and closing property of valve port is good, guarantees not have any leakage.

For achieving the above object, the solution that the utility model is taked is: a kind of normal close type solenoid valve, it comprises valve body, valve gap, last static iron core, following moving iron core and coil and housing, diaphragm unit is put in the valve port of valve body and is divided into upper gas chamber and lower chamber, go up the fixing static iron core of going up in the magnetic shield, the magnetic core cover is arranged below the last static iron core, load moving iron core in the magnetic core cover, has pod apertures in the moving iron core down, the pod apertures internal diameter is up big and down small, pod apertures top dress return spring, and the return spring upper end withstands in the hole of centre below the static iron core, the joint spring is debug in moving iron core lower end down, spacer is arranged below the Regulation spring, the retaining pad is arranged below the spacer, the retaining pad being stuck in magnetic core cover end opening, magnetic shield is installed in the valve gap by nut, and valve gap is fixed on the valve body.

Solenoid valve is installed in the system of required control, is connected with compressor power, when the working end needed fluid, compressor was given solenoid valve with electrical signal.After the solenoid valve energising, will descend iron core to pack up, and bleed off air in the solenoid valve upper gas chamber by pod apertures, then by lower chamber pressurized air jack-up voluntarily, fluid passes through diaphragm unit.When the working end fluid reaches one regularly, by pressure controller or expansion valve etc. electrical signal is passed to compressor, compressor is cut off the electricity supply, and moving iron core automatically resets under the solenoid valve, finish an operation cycle, it is applicable to refrigeration system, compressor control system and boiler supply and drain water system.

The utility model reasonable in design adopts diaphragm unit, and closing property of valve port is good, guarantees not have any leakage.

Description of drawings

Fig. 1 is the utility model plan view.

Fig. 2 is the diaphragm unit structural representation.

1, valve body, 2, gaseous core, 3, O type circle, 4, valve gap, 5, nut, 6, coil and housing, 7, go up static iron core, 8, the top split nut, 9, cap is moulded on the top, and 10, O type circle, 11, moving iron core down, 12, O type circle, 13, pressing plate, 14, diaphragm, 15, the riveting pad, 16, take over, 17, magnetic shield, 18, the magnetic core cover, 19, return spring, 20, spacer, 21, Regulation spring, 22, upper gas chamber, 23, lower chamber, 24, the retaining pad.

Embodiment

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Referring to Fig. 1, a kind of normal close type solenoid valve, it comprises valve body 1, valve gap 4, last static iron core 7, following moving iron core 11 and coil and housing 6, diaphragm unit is put in the valve port of valve body 1 and is divided into upper gas chamber 22 and lower chamber 23, go up the fixing static iron core 7 of going up in the magnetic shield 17, magnetic core cover 18 is arranged below the last static iron core 7, load moving iron core 11 in the magnetic core cover 18, has pod apertures in the moving iron core 11 down, the pod apertures internal diameter is up big and down small, pod apertures top dress return spring 19, and return spring 19 upper ends withstand in the static iron core 7 following middle holes, joint spring 21 is debug in moving iron core 11 lower ends down, spacer 20 is arranged below the Regulation spring 21, retaining pad 24 is arranged below the spacer 20, retaining pad 24 is stuck in magnetic core and overlaps 18 end openings, magnetic shield 17 is installed in the valve gap 4 by nut 5, and valve gap 4 is fixed on the valve body 1.

Referring to Fig. 1, cover top split nut 8 on the magnetic shield 17, top split nut 8 snaps in coil and housing 6, and the top is moulded cap 9 and top split nut 8 screw-thread fit and is tightened and be attached to coil and above the housing 6.

Referring to Fig. 1, the two ends of valve body 1 are connected to takes over 16.

Referring to Fig. 1, adjust plate (not marking among Fig. 1) between Regulation spring 21 and the spacer 20 in addition.

Referring to Fig. 1, also has sealing gasket (not marking among Fig. 1) between spacer 20 and the retaining pad 24.

Referring to Fig. 1 and Fig. 2, diaphragm unit is made of diaphragm 14, gaseous core 2, pressing plate 13 and riveting pad 15, and diaphragm 14 passes on the gaseous core 2 and pushed down down by 15 rivetings of riveting pad by pressing plate 13.

The utility model is generally used for liquid refrigeration or exhaust, water, pressurized air.

Claims

1, a kind of normal close type solenoid valve, it comprises valve body (1), valve gap (4), last static iron core (7), following moving iron core (11) and coil and housing (6), it is characterized in that: diaphragm unit is put in the valve port of valve body (1) and is divided into upper gas chamber (22) and lower chamber (23), go up the fixing static iron core (7) of going up in the magnetic shield (17), magnetic core cover (18) is arranged below the last static iron core (7), load moving iron core (11) in the magnetic core cover (18), has pod apertures in the moving iron core (11) down, the pod apertures internal diameter is up big and down small, pod apertures top dress return spring (19), return spring (19) upper end withstands in the following middle hole of static iron core (7), joint spring (21) is debug in moving iron core (11) lower end down, spacer (20) is arranged below the Regulation spring (21), retaining pad (24) is arranged below the spacer (20), retaining pad (24) is stuck in magnetic core cover (18) end opening, and magnetic shield (17) is installed in the valve gap (4) by nut (5), and valve gap (4) is fixed on the valve body (1).

2, normal close type solenoid valve according to claim 1, it is characterized in that: described magnetic shield (17) is gone up cover top split nut (8), top split nut (8) snaps in coil and housing (6), and the top is moulded cap (9) and top split nut (8) screw-thread fit and tightened and be attached to coil and above the housing (6).

3, normal close type solenoid valve according to claim 1 is characterized in that: the two ends of described valve body (1) are connected to adapter (16).

4, normal close type solenoid valve according to claim 1 is characterized in that: adjust plate in addition between described Regulation spring (21) and the spacer (20).

5, normal close type solenoid valve according to claim 1 is characterized in that: also have sealing gasket between described spacer (20) and the retaining pad (24).

6, normal close type solenoid valve according to claim 1, it is characterized in that: described diaphragm unit is made of diaphragm (14), gaseous core (2), pressing plate (13) and riveting pad (15), and diaphragm (14) passes gaseous core (2) and upward pushed down down by riveting pad (15) riveting by pressing plate (13).