CN201310638Y

CN201310638Y - Pilot-operated magnetic valve

Info

Publication number: CN201310638Y
Application number: CNU2008201702694U
Authority: CN
Inventors: 王朝阳; 王尔群; 吕烈平; 魏建平
Original assignee: NINGBO HUACHENG VALVE CO Ltd
Current assignee: NINGBO HUACHENG VALVE CO Ltd
Priority date: 2008-12-17
Filing date: 2008-12-17
Publication date: 2009-09-16
Anticipated expiration: 2018-12-17

Abstract

A pilot-operated magnetic valve comprises a valve body, a valve core and a magnetic valve, wherein the valve body is provided with an inlet and an outlet. A valve base arranged in the valve body is equipped with a main valve core, a cavity in the valve body is divided into an upper chamber and a lower chamber by a valve member arranged on a valve rod, and a spring supports against the valve member and a top surface in the valve body. A balance hole in the valve rod is provided with a guide top pin, and a lower end of the valve rod is equipped with a flow controller for coordinating with the guide top pin in order to realize communication between the upper and the lower chambers. The lower chamber is communicated with a pilot-operated cavity of the magnetic valve through a pilot-operated hole, and the pilot-operated cavity is communicated with the outlet of the valve body through an effusion hole. The valve core controlled by the magnetic valve fits to the effusion hole in an on-off manner, a side face of the valve body is sealed-provided with a rotary switch, and the inner end of the rotary switch supports against or is separated from the bottom face of the valve core. The pilot-operated magnetic valve can not only use operation members outside the valve body to control a main valve switch but also use an emergency switch to control the main valve switch because the valve rod on the main valve core is directly or indirectly connected with the operation members, thereby providing a reasonable structure and avoiding environmental pollution.

Description

A kind of guide electromagnetic valve

Technical field

The utility model relates to a kind of guide electromagnetic valve.

Background technique

Mainly there is following shortcoming in traditional guide electromagnetic valve, does not have emergency cock, when solenoid valve damages, the main valve plug in the guide electromagnetic valve is opened, to satisfy emergent need; Some valve directly is discharged into the fluid of upper chamber in the air to reduce the pressure of upper chamber, influences environment easily; The equalizing orifice opening does not have filter assemblies in addition, and making granule foreign enter upper chamber easily influences the normally closed of solenoid valve or the obstruction that shape is played pilot hole, and influences the use of valve.

Other looks into the patent No. is 97239430.3 Chinese patent slip guide electromagnetic valve, it is that main valve plug is installed in the main valve sleeve, have throttle orifice on the main valve plug wall, main valve plug is installed on the main valve seat in the valve body, outlet pipe is installed at the main valve plug center, outlet pipe is installed on the dispenser sleeve with connecting ring, dispenser sleeve is installed in the valve gap, distributing valve is installed in the dispenser sleeve, and being flow pass in the middle of the distributing valve is communicated with relief hole on the distributing valve wall, has the entrance pressure hole on the dispenser sleeve, valve control electromagnet is installed on the valve gap, the dress push rod of wherein feeling at ease, push rod passes valve gap and contacts with distributing valve, and it does not have emergency cock.

The patent No. is 90213142.7 Chinese patent band manual operating device guide electromagnetic valve.Adopt a manual eccentric shaft valve-opening mechanism., reached and manually opened very labour-saving purpose of valve guide valve core jack-up by eccentric rotation axis.And mouthful slip ring that heads straight for of three roads and two road mutual dislocation is housed respectively on main valve plug and directional post, it is provided with operating switch, controls main valve events, but does not have operation piece, controls main valve events, also has unreasonable part.

The model utility content

Technical problem to be solved in the utility model provides a kind of guide electromagnetic valve, and it can control the main valve switch by operation piece, can control the main valve switch by emergency cock again, and is rational in infrastructure, can avoid befouling environment.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of guide electromagnetic valve, it includes valve body, main valve plug, valve rod, solenoid valve, wherein valve body has import and outlet respectively, the valve seat cooperation is equipped with main valve plug in valve body, the valve body inner cavity is divided into epicoele and cavity of resorption by the valve assemblies on the valve rod, be supported with spring between above in valve assemblies and the valve body, equalizing orifice in the valve rod is provided with the guiding thimble, the lower end of valve rod is equipped with flow control member, cooperate with the guiding thimble, realize the connection of epicoele and cavity of resorption, and epicoele also is communicated with guide's cavity of solenoid valve by pilot hole, guide's cavity is communicated with outlet on the valve body by the cascading water hole, and the spool of electromagnetic valve is closed or is opened with the cascading water hole and cooperates, and the valve body side seal is provided with rotary switch, the rotary switch inner end is to conflict or break away to cooperate with the spool bottom surface, it is characterized in that the valve rod on the main valve plug is connected with valve body operation piece outward directly or indirectly.

As improvement, described rotary switch inner end is an eccentric shaft, and is simple and practical.

Further improve, described equalizing orifice ingress is provided with filter screen, can prevent that granule foreign from entering epicoele and influencing the normally closed of solenoid valve or the obstruction that shape is played pilot hole, and influence the use of valve.

As improvement, described solenoid valve is to be threaded on the valve body, makes the spool of electromagnetic valve directly be arranged in top, cascading water hole, is provided with little spring between spool and the solenoid valve hypomere, is convenient to production and assembly.

At last, described spool adopts the armature of solenoid valve, with simplified structure, reduces cost.

Compared with prior art, advantage of the present utility model is: manual rotary switch can be by manually opening valve to solve the possible period of want or need under the situation of outage; Directly be discharged in the air different with some valve with the pressure that reduces upper chamber the fluid of upper chamber, this manual rotary switch is directly to open armature, epicoele communicates with valve outlet, fluid is also in pipeline, can not be splashed on the people's who opens the body, this class valve is specially adapted to sewage conduct or other influence the pipeline of the medium of health; In addition,, add a filter screen, prevent that granule foreign from entering epicoele and influencing the normally closed of solenoid valve or the obstruction that shape is played pilot hole, and influence the use of valve that total is reasonable and practical at the opening of equalizing orifice.

Description of drawings

Fig. 1 is the sectional view (under the closed electromagnetic valve state) of this valve;

Fig. 2 is the sectional view (under the solenoid valve open mode) of this valve;

Fig. 3 is the plan view of this valve.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Anticipate as shown in the figure, a kind of guide electromagnetic valve, it includes valve body 1, main valve plug 2, valve rod 3, solenoid valve 4 critical pieces such as grade, wherein valve body 1 has import 1.1 and outlet 1.2 respectively, valve body 1 is divided into valve upper cover 1.3 and valve base 1.4 two-part, they are to altogether, clamp valve assemblies 5, valve body 1 inner cavity is divided into epicoele 1.5 and cavity of resorption 1.6, valve 5.1 and punch holder 5.2 and die holder 5.3 in the middle of valve assemblies 5 includes, by 3.2 spacing being fixed on valve rod 3 middle section positions of the convex shoulder on nut 6 and the valve rod, be supported with spring 7 between above in valve assemblies 5 and the valve body 1, the hypomere of valve rod 3 is fixed with pressure cap 2.1 by nut 6 and clamping plate 8, position, pressure cap 2.1 middle and lower part is inlayed and is fixed with sealing gasket 2.2, become main valve plug 2, with valve seat 9 center hole fitted seal, valve rod 3 epimeres link together as handwheel by the outer operation piece of connecting rod 10 and valve body 11, connecting rod 10 is to be threaded with valve body 1, be convenient to rotation by operation piece 11, driving main valve plug 2 rises or descends, realize the unlatching of main valve plug 2 or close, valve rod 3 centers have equalizing orifice 3.1, equalizing orifice 3.1 presents " T " font substantially, in equalizing orifice 3.1, be provided with guiding thimble 12 is installed, it is Spielpassung, the lower end screw thread of valve rod 3 is connected with flow control member 13, cooperate with guiding thimble 12, realize the connection of epicoele 1.5 and cavity of resorption 1.6, ingress at equalizing orifice 3.1, install a filter screen 14, epicoele 1.5 also is communicated with guide's cavity 4.1 of solenoid valve 4 by pilot hole 15, guide's cavity 4.1 is communicated with outlet 1.2 on the valve body by cascading water hole 16, solenoid valve 4 is to be threaded on the loam cake 1.3 of valve body, and adopt the seal ring implementation to be tightly connected, the armature of solenoid valve is as spool 4.2, make the spool 4.2 of solenoid valve 4 controls directly be arranged in 16 tops, cascading water hole, be provided with little spring 17 between spool 4.2 and solenoid valve 4 hypomeres, being convenient to spool 4.2 opens or closes with cascading water hole 16 and cooperate, valve upper cover 1.3 sides are installed and are provided with rotary switch 18, rotary switch 18 inner ends are eccentric shafts 18.1, realize that rotary switch 18 inner ends and spool 4.2 bottom surfaces are to conflict or break away to cooperate, mounting hole is installed by seal ring realization sealing in rotary switch 18 and the valve upper cover 1.3.

Its working principle is such: during energising, under the effect of electromagnetic force, armature as spool separates with the solenoid valve valve seat, pilot hole and the connection of cascading water hole are opened, upper cavity pressure descends rapidly, forming low high pressure reduction around the sealing gasket of main valve plug, hydrodynamic pressure promotes main valve plug 2 and moves up valve open; During outage, spring force blocks pilot hole and cascading water hole and cut out by spool, and fluid arrives epicoele by equalizing orifice, make the pressure and the inlet pressure balance of epicoele, under the effect of spring force, under forming around main valve plug 2 sealing gaskets, hang down high pressure reduction, throttle down.After manual rotary switch 18 is opened, switch forces armature to separate with the solenoid valve valve seat, pilot hole and the connection of cascading water hole are opened, upper cavity pressure descends rapidly, low high pressure reduction on around main valve plug 2 sealing gaskets, forming, hydrodynamic pressure promotes main valve plug 2 and moves up, valve open, and manual rotary switch 18 can be by manually opening valve to solve the possible period of want or need under the situation of outage.

Directly be discharged in the air different with some valve with the pressure that reduces upper chamber the fluid of upper chamber, this manual rotary switch 18 is directly to open armature, epicoele communicates with valve outlet, fluid is also in pipeline, can not be splashed on the people's who opens the body, this class valve is specially adapted to sewage conduct or other influence the pipeline of the medium of health.

In addition,, add a filter screen 14, prevent that granule foreign from entering upper chamber and influencing the normally closed of solenoid valve or the obstruction that shape is played pilot hole, and influence the use of valve in the ingress of equalizing orifice 3.1.

Claims

1, a kind of guide electromagnetic valve, it includes valve body, main valve plug, valve rod, solenoid valve, wherein valve body has import and outlet respectively, the valve seat cooperation is equipped with main valve plug in valve body, the valve body inner cavity is divided into epicoele and cavity of resorption by the valve assemblies on the valve rod, be supported with spring between above in valve assemblies and the valve body, equalizing orifice in the valve rod is provided with the guiding thimble, the lower end of valve rod is equipped with flow control member, cooperate with the guiding thimble, realize the connection of epicoele and cavity of resorption, and epicoele also is communicated with guide's cavity of solenoid valve by pilot hole, guide's cavity is communicated with outlet on the valve body by the cascading water hole, and the spool of electromagnetic valve is closed or is opened with the cascading water hole and cooperates, and the valve body side seal is provided with rotary switch, the rotary switch inner end is to conflict or break away to cooperate with the spool bottom surface, it is characterized in that the valve rod on the main valve plug is connected with valve body operation piece outward directly or indirectly.

2, guide electromagnetic valve according to claim 1 is characterized in that described rotary switch inner end is an eccentric shaft.

3, guide electromagnetic valve according to claim 1 and 2 is characterized in that described equalizing orifice ingress is provided with filter screen.

4, guide electromagnetic valve according to claim 3 is characterized in that described solenoid valve is to be threaded on the valve body, makes the spool of electromagnetic valve directly be arranged in top, cascading water hole, is provided with little spring between spool and the solenoid valve hypomere.

5, guide electromagnetic valve according to claim 4 is characterized in that described spool adopts the armature of solenoid valve.