CN206036245U - Anti -explosion pilot -operated type electromagnetic valve - Google Patents

Abstract

The utility model discloses an anti -explosion pilot -operated type electromagnetic valve, case hole and the import of valve body both sides portion and the export intercommunication of valve body, the case is downthehole to have the case subassembly, the main valve of case subassembly inserts in the case downtheholely, extend the bottom of main valve has the plunger, closely contradict and form the clearance in the port border of exit internal channel in the bottom border of plunger, the bottom side portion and the import of main valve correspond, gland seal connects in the drill way position in case hole, there is the clearance in the top surface of main valve with the bottom surface of gland, reset spring locates in the main valve, the both ends face of gland is equipped with the recess respectively, two recesses are through first guide hole intercommunication, contradict in the recess of gland bottom surface in reset spring's top, the rank trapezoidal surface lower part in the case hole of valve body is equipped with the cavity, the cavity is through a through -hole and export intercommunication, the downthehole round hole that is equipped with of guide, first guide hole drill way position in the gland top surface department recess is connected with solenoid -operated switch. Its novel structure is unique, and is simple reasonable, easy production, installation easy maintenance, excellent in use effect.

Description

A kind of explosion-proof guide electromagnetic valve

Technical field

The utility model is related to a kind of valve technology field, especially a kind of explosion-proof guide electromagnetic valve.

Background technology

Magnetic valve is widely used in industrial control system, its be mainly used in controlling the pressure of medium, flow and The other specifications such as flow direction.Magnetic valve is that realizing expected control, high with control accuracy, flexibility is high by the break-make of circuit The features such as.In actual life, sealing property, functional requirement, performance, negotiability and the key of magnetic valve is structurally characterized in that It is located.

Guide electromagnetic valve is and the little valve of circulation area by solenoid controlled.Often during position, main valve envelope valve, secondary valve Poppet port is sealed, pressure balance in valve pocket.When the coil is energized, produce electromagnetic force to suct movable core, drive secondary valve to beat Open, the medium in valve body leaks from poppet port, so that producing pressure differential, main valve is lifted up, and primary valve is opened, and magnetic valve just leads to Road is unimpeded.Work as coil blackout, magnetic field disappears, and dynamic iron core resets, secondary valve closure poppet port, main valve envelope valve, valve body cavity pressure After balance, valve is again in the normal position of cut out.It is characterized in：The fluid pressure range upper limit compared with it is high, install directionless restriction, power it is little, can With frequently energization and energy-conservation, but fluid pressure difference condition must is fulfilled for, is not suitable for liquid.

Existing electromagnetic valve structure is complicated, and sealing property is bad, high cost, short life, installation and maintenance trouble, potential faults Many, gas flow resistance is big, fifth wheel smoothly can not be discharged, clamping stagnation easily occur and ice is stifled, the fault rate of increase magnetic valve, and electromagnetism Valve safe and reliable and be highly important, therefore the innovation of magnetic valve is very important with improvement.

Utility model content

The purpose of this utility model is for a kind of raising using effect and reality that solve the deficiency of above-mentioned technology and design With a kind of explosion-proof guide electromagnetic valve of performance.

A kind of explosion-proof guide electromagnetic valve designed by the utility model, including valve body, the both sides of the valve body are distinguished Inlet and outlet is provided with, and the inside of valve body is provided with, the valve element There is in hole core assembly, the core assembly includes main valve, gland and back-moving spring, and the main valve is inserted in spool bore, and The bottom of main valve is extended with plunger, and the diameter of the plunger is less than the diameter of main valve, and the bottom sides edge of the plunger closely contacts at out Mouthful place internal channel port edges, and main valve bottom surface and entrance surface channel between by plunger formation gap, the bottom of main valve Sidepiece is corresponding with import, and the gland is sealedly attached to the orifice position of spool bore, and the bottom surface of the top surface of main valve and gland is deposited In gap, in main valve, the both ends of the surface of the gland are respectively equipped with groove to the back-moving spring, and two grooves are connected by pilot hole Logical, the top of the back-moving spring is contacted in the groove of gland bottom surface, and the cascaded surface bottom of the spool bore of the valve body is provided with sky Chamber, the cavity pass through a through hole and outlet, are provided with a circular hole connected with cavity in the pilot hole, recessed at the gland top surface Pilot hole orifice position in groove is connected with the solenoid-operated switch for being turned on and off the aperture of pilot hole.

Further, the solenoid-operated switch includes dynamic iron core, static iron core, solenoid, sleeve and insulation shell, and this is quiet Iron core and solenoid are placed in insulation shell, and sleeve and static iron core are inserted in inside solenoid, the static iron core Bottom and dynamic iron core are inserted in sleeve, and the sleeve is bolted in the groove of gland top surface, have spring one in the dynamic iron core, The bottom surface connecting spring seat of the static iron core, the top of the spring one are connected with spring base, and bottom surface and the dynamic iron core of static iron core Top surface between there is gap.

Further, the dynamic iron core includes armature, secondary valve, cutting ferrule and spring two, and the bottom surface of the armature is provided with caulking groove, the pair Valve is fixed on the bottom of cutting ferrule, and secondary valve and cutting ferrule are inserted in caulking groove, and the spring two is placed on cutting ferrule, and the top of spring two Face is contradicted with the bottom surface of caulking groove, and the spring one is embedded in the top surface of armature, and the secondary valve is pointed to the elder generation in gland top surface groove Guide hole orifice position.

Further, the sidepiece of the main valve is additionally provided with dirt discharge groove.

Further, the upper end sidepiece of the main valve is provided with least three annular grooves, has snapped in back-up ring in the annular groove.

A kind of explosion-proof guide electromagnetic valve designed by the utility model, its structure novel and unique, advantages of simple, Yi Sheng Produce, convenient to install and maintain, using effect is good, and low cost of manufacture, physical life are long, reduce the fault rate that magnetic valve occurs；Enter one Step improves using effect and Practical Performance, while safe and reliable, Jing practical applications, Social and economic benef@are notable.

Description of the drawings

Fig. 1 is the overall structure sectional view of embodiment 1；

Fig. 2 is the structural representation of the dynamic iron core of embodiment 1；

Fig. 3 is the structural representation of the main valve of embodiment 1.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only the utility model a part of embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, the every other embodiment obtained by those of ordinary skill in the art all belongs to In the scope of the utility model protection.

Embodiment 1：

As shown in figures 1 and 3, a kind of explosion-proof guide electromagnetic valve described by the present embodiment, including valve body 1, the valve The both sides of body 1 are respectively equipped with import 7 and outlet 8, and the inside of valve body 1 is provided with and is connected and in rank with import 7 and outlet 8 respectively The spool bore 19 of scalariform, has core assembly 20 in the spool bore 19, the core assembly 20 includes main valve 2, gland 4 and resets Spring 3, the main valve 2 are inserted in spool bore 19, and the bottom of main valve 2 is extended with plunger 23, and the diameter of the plunger 23 is less than master The diameter of valve 2, the bottom sides of the plunger 23 along the port edges for closely contacting at internal channel at outlet 8, and the bottom surface of main valve 2 with Gap 24 is formed by plunger 23 between surface channel at import 7, the bottom side of main valve 2 is corresponding with import 7, the sealing of gland 4 connects The orifice position of spool bore 19 is connected to, and the top surface of main valve 2 has gap 24 with the bottom surface of gland 4, the back-moving spring 3 is located at In main valve 2, the both ends of the surface of the gland 4 are respectively equipped with groove 25, and two grooves 25 are connected by pilot hole 5, the back-moving spring 3 Top contact in the groove 25 of 4 bottom surface of gland, the cascaded surface bottom of the spool bore 19 of the valve body 1 is provided with cavity 14, should Cavity 14 is connected with outlet 8 by a through hole 13, is provided with a circular hole 51 connected with cavity 14 in the pilot hole 5, and the gland 4 is pushed up 5 orifice position of pilot hole at face in groove 25 is connected with the solenoid-operated switch for being turned on and off the aperture of pilot hole 22。

Dynamic iron core 26, static iron core 16, solenoid 18, sleeve are included by the solenoid-operated switch 22 in the present embodiment 9 and insulation shell 21, the static iron core 16 and solenoid 18 are placed in insulation shell 21, and sleeve 9 and static iron core 16 are inserted Enter inside solenoid 18, the bottom of the static iron core 16 and dynamic iron core 26 are inserted in sleeve 9, and the sleeve 9 is bolted in pressure In the groove 25 of 4 top surface of lid, there is in the dynamic iron core 26 spring 1, the bottom surface connecting spring seat 17 of the static iron core 16, the bullet The top of spring 1 is connected with spring base 17, and there is gap 24 between the bottom surface of static iron core 16 and the top surface of dynamic iron core 26.

Dirt discharge groove 2a is additionally provided with by the sidepiece of the main valve 2 in the present embodiment so that preferably fifth wheel can be carried out Smoothly discharge, it is not easy to the circulation of blocking channel.

At least three annular grooves 27 are provided with by the upper end sidepiece of the main valve in the present embodiment, in the annular groove 27, gear has been snapped in Circle 28 so that fluid is easily entered in cavity 14 into after the gap between the top surface of main valve 2 and the bottom surface of gland 4.

As shown in Fig. 2 the dynamic iron core 26 includes armature 12, secondary valve 6, cutting ferrule 10 and spring 2 11, the bottom of the armature 12 Face is provided with caulking groove 29, and the secondary valve 6 is fixed on the bottom of cutting ferrule 10, and secondary valve 6 and cutting ferrule 10 are inserted in caulking groove 29, the spring 2 11 are placed on cutting ferrule 10, and the top surface of spring 2 11 is contradicted with the bottom surface of caulking groove 29, and the spring 1 is embedded in armature 12 Top surface, the secondary valve 6 is pointed to 5 orifice position of pilot hole in 4 top surface groove 25 of gland so that installation and removal are convenient, knot Structure has more compactedness.

Operation principle：When the solenoid 18 of solenoid-operated switch 22 is not powered on, it is two-way that medium is entered from entrance, all the way Act directly on the plunger 23 of main valve lower surface, and realize the power to main valve 2 upwards, another road is through main valve 2 and valve body 1 Gap, flow through the upper surface that annular groove 27 and back-up ring 28 reach main valve 2, apply downward power to main valve 2, due to upper surface stress Area is more than lower surface lifting surface area, along with produced by 16 compression spring of spring force and static iron core transmitted by gland 4 Spring force, make 2 envelope valve of main valve, secondary valve 6 seal the aperture of pilot hole 5, pressure balance in valve pocket；When solenoid-operated switch 22 When solenoid 18 is powered, produces electromagnetic force and inhale dynamic iron core on 29, drive secondary valve 6 to open, the medium in valve body 1 is from pilot hole 5 leak, so that producing pressure differential, main valve 2 receives medium active force upwards, and main valve 2 is opened, and makes gas circuit unimpeded.Work as electromagnetic wire Enclose 18 power-off, magnetic force disappears, dynamic iron core 26 resets under spring force, secondary valve 6 closes first pilot hole 5,2 envelope valve of main valve, from And close magnetic valve.

The present embodiment design parameter when in use is as follows：

1st, inside nominal diameter：18mm；

2nd, nominal pressure：25MPa；

3rd, working media：Air, nitrogen, natural gas；

4th, operating voltage：DC24V；

5th, operating current：0.92A；

6th, interface size：G1 internal threads.

Compared with prior art, the structure in the present embodiment has further the advantage that：

1. simple structure, easy to maintenance：Valve body 1 is directly connected by screw thread with sleeve 9, o-ring sealing, simple structure, The assembling of secondary valve 6, armature 12, cutting ferrule 10 and spring 2 11 is structure as a whole, and makes simple system, installs and maintenance all facilitates；

2 low costs and long service life：Secondary valve 6 is passed through cutting ferrule and spring 2 11 and is connected with armature 12, and spring 2 11 can be with 12 stroke of armature is adjusted, 12 machining accuracy of armature is reduced, shortens the production cycle, reduces cost；Spring reduces the secondary valve 6 of main valve 2 pairs Impulsive force, extend secondary 6 service life of valve；

3. low pressure seal effect is good：It is connected by back-moving spring 3 between main valve 2 and gland 4, under low voltage situations, spring Power can help main valve 2 to close, and prevent medium from leaking；

4. potential faults are few：Spring 1 is mounted on spring base 17, to the spring one between dynamic iron core 26 and static iron core 16 15 are oriented to, and prevent spring from shifting in repeating motion, affect 26 stroke of dynamic iron core.Main valve 2 is designed with overall material Material is processed, and has dirt discharge groove 2a on the circumference of main valve 2, is reduced the contact area with valve body 1, can be effectively reduced ice Stifled probability of happening, can also reduce gas flow resistance, and form inner chamber and valve body 1 between, it is easy to the exclusion of fifth wheel.Separately Outward, increase the sectional area of main valve 2, main valve 2 can be made to be subject to medium active force increase upwards, fifth wheel and other reasonses are reduced The catching phenomenon for causing, is greatly reduced the probability that magnetic valve breaks down.

The utility model is not limited to above-mentioned preferred forms, and anyone can be drawn under enlightenment of the present utility model Other various forms of products, however, make any change in its shape or structure, it is every with same as the present application or phase Approximate technical scheme, all falls within protection domain of the present utility model.

Claims (5)

1. a kind of explosion-proof guide electromagnetic valve, including valve body, the both sides of the valve body are respectively equipped with inlet and outlet, and valve body Inside be provided with, there is in the spool bore core assembly, which is special Levy and be：The core assembly includes main valve, gland and back-moving spring, and the main valve is inserted in spool bore, and the bottom of main valve Plunger is extended with, the diameter of the plunger is less than the diameter of main valve, the bottom sides edge of the plunger closely contacts at exit internal channel Port edges, and main valve bottom surface and entrance surface channel between gap, the bottom side of main valve and import are formed by plunger Correspondence, the gland are sealedly attached to the orifice position of spool bore, and the top surface of main valve has gap with the bottom surface of gland, and this is multiple In main valve, the both ends of the surface of the gland are respectively equipped with groove to position spring, and two grooves are connected by pilot hole, the reset bullet The top of spring is contacted in the groove of gland bottom surface, and the cascaded surface bottom of the spool bore of the valve body is provided with cavity, and the cavity leads to A through hole and outlet is crossed, a circular hole connected with cavity in the pilot hole, is provided with, the guide at the gland top surface in groove Hole orifice position is connected with the solenoid-operated switch for being turned on and off the aperture of pilot hole.

2. a kind of explosion-proof guide electromagnetic valve according to claim 1, it is characterised in that：The solenoid-operated switch includes Dynamic iron core, static iron core, solenoid, sleeve and insulation shell, the static iron core and solenoid are placed in insulation shell, and are covered Cylinder and static iron core are inserted in inside solenoid, and the bottom of the static iron core and dynamic iron core are inserted in sleeve, the sleeve spiral shell It is connected in the groove of gland top surface, with spring one in the dynamic iron core, the bottom surface connecting spring seat of the static iron core, the spring one Top is connected with spring base, and there is gap between the bottom surface of static iron core and the top surface of dynamic iron core.

3. a kind of explosion-proof guide electromagnetic valve according to claim 2, it is characterised in that：The dynamic iron core include armature, Secondary valve, cutting ferrule and spring two, the bottom surface of the armature are provided with caulking groove, and the secondary valve is fixed on the bottom of cutting ferrule, and secondary valve and cutting ferrule Insert in caulking groove, the spring two is placed on cutting ferrule, and the top surface of spring two is contradicted with the bottom surface of caulking groove, the spring one is embedded in In the top surface of armature, the secondary valve is pointed to the pilot hole orifice position in gland top surface groove.

4. a kind of explosion-proof guide electromagnetic valve according to claim 1, it is characterised in that：The sidepiece of the main valve is additionally provided with Dirt discharge groove.

5. a kind of explosion-proof guide electromagnetic valve according to claim 1, it is characterised in that：The upper end sidepiece of the main valve sets There are at least three annular grooves, in the annular groove, snapped in back-up ring.