CN202914757U

CN202914757U - Anti-explosion pilot-operated type solenoid valve

Info

Publication number: CN202914757U
Application number: CN 201220509343
Authority: CN
Inventors: 杨亚青; 胡涛; 王宝云
Original assignee: Zhengzhou Zheng Hang General Aviation Industry Science And Technology Co Ltd
Current assignee: Henan Aerospace Hydraulic and Pneumatic Technology Co Ltd
Priority date: 2012-10-08
Filing date: 2012-10-08
Publication date: 2013-05-01
Anticipated expiration: 2022-10-08

Abstract

The utility model relates to an anti-explosion pilot-operated type solenoid valve and can effectively solve the problems that a main valve structure of the existing pilot-operated type solenoid valve is complex in structure, high in cost, short in service life, large in air flow resistance and apt to break down, has many fault hidden dangers and a little number of drain grooves and is apt to block due to unsmooth redundancy discharge. The technical scheme is that the anti-explosion pilot-operated type solenoid valve comprises a valve body, wherein a main valve is arranged in the valve body, a pilot hole is arranged at the center of the main valve, an inlet is arranged on one side of the valve body, an outlet is arranged on the other side of the valve body, and the inlet and the outlet are both connected with the main valve. The pilot hole of the main valve is respectively connected with the outlet and an auxiliary valve arranged on the main valve to form a channel, a drain groove is arranged on the peripheral wall of the main valve, a moving iron core is arranged on the upper portion of the auxiliary valve (namely a pilot valve) and is connected with a fixed iron core arranged on the upper portion of the moving iron core through a spring, and an electromagnetic coil is respectively wound on the moving iron core and the fixed iron core. The anti-explosion pilot-operated type solenoid valve is simple in structure, good in use effect and innovative.

Description

Explosion-proof guide electromagnetic valve

Technical field

The utility model relates to valve, particularly a kind of explosion-proof guide electromagnetic valve.

Background technique

Solenoid valve is the industry equipment with Electromagnetic Control, is used in direction, flow, speed and other the parameter of adjusting medium in the industrial control system.Solenoid valve can cooperate different circuit to realize the control of expecting, and precision and the flexibility of control can both guarantee.Solenoid valve has a variety of, different solenoid valves plays a role at the diverse location of control system, in fact, present universaling electromagnetic valve, basically be leading type, the solenoid valve that only has logical liquid much is direct-acting type in addition, mainly is because the impurity of fluid the inside may stop up the leader channel of tiny pilot valve.

Pilot valve is a valve that flow area is very little, and the unlatching of this valve is by solenoid controlled, and after pilot valve was opened, medium just can flow into piston or diaphragm device before the valve, and so just can open with the electric energy of smaller power needs the very large valve of strength.On sequence of operation, valve just can conducting greatly to only have little valve elder generation's conducting (unlatchings), so this little valve is called " pilot valve ", the characteristics of guide electromagnetic valve are that power consumption is little, can frequently switch on, long-time energising and can not burning, and energy-conservation, and the hydrodynamic pressure range limit is higher, (needing customization) can be installed arbitrarily, but must satisfy the fluid pressure difference condition, because the impurity of liquid easily stops up guide's valve opening, not be suitable for liquid.

Existing guide electromagnetic valve main valve structure is complicated, and cost is high, and the life-span is short, and potential faults is many, dump tank is less, and the gas flow resistance is large, and fifth wheel can not be discharged smoothly, easily clamping stagnation, increased the solenoid valve failure rate, therefore, the improvement of solenoid valve is the problem of needing at present solution badly.

Summary of the invention

For above-mentioned situation, for solving the defective of prior art, the purpose of the utility model just provides a kind of explosion-proof guide electromagnetic valve, can effectively solve existing guide electromagnetic valve main valve structure complicated, cost is high, life-span is short, and potential faults is many, and dump tank is less, the gas flow resistance is large, fifth wheel can not be discharged smoothly, easy clamping stagnation, troublesome problem.

The technological scheme that the utility model solves is, comprises valve body, and main valve is housed in the valve body, there is pilot hole at the main valve center, valve body one side has entrance, and opposite side has outlet, and entrance links to each other with main valve with outlet, the pilot hole of main valve is connected with the secondary valve that outlet is connected with main valve respectively, form passage, on the main valve periphery wall dump tank is arranged, iron core is arranged at secondary valve (claiming again pilot valve) top, moving iron core links to each other with the static iron core on its top by spring, has installed around electromagnetic coil on moving iron core and the static iron core.

The utility model is simple in structure, using effect good, is the innovation on the guide electromagnetic valve.

Description of drawings

Fig. 1 is structure master's pseudosection of the present utility model.

Fig. 2 is main valve structure sectional drawing of the present utility model.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Provided by Fig. 1-2, the utility model comprises valve body, and main valve 2 is housed in the valve body 1, there is pilot hole 3 at main valve 2 centers, valve body 1 one sides have entrance 4, and opposite side has outlet 5, and entrance 4 links to each other with main valve 2 with outlet 5, the pilot hole 3 of main valve 2 is connected with secondary valve 6 above outlet 5 is connected with main valve respectively, form passage, on main valve 2 periphery walls dump tank 7 is arranged, iron core 8 is arranged at secondary valve 6 tops, moving iron core 8 links to each other with the static iron core 10 on its top by spring 9, has installed around electromagnetic coil 11 on moving iron core 8 and the static iron core 10.

Described dump tank 7 has 4 at least, is distributed on main valve 2 periphery walls.

The integral structure that described main valve 2 is made for plastics.

Use condition of the present utility model is that when electromagnet was not switched on, gas entered from import and is divided into two-way, one the tunnel acts directly on the lower end surface of main valve, apply active force upwards to main valve, another road is through the slit between main valve and the valve body, and the back-up ring of flowing through arrives the upper-end surface of main valve; Apply downward active force to main valve, because the lifting surface area of main valve upper-end surface is greater than the lifting surface area of main valve lower end surface, add the spring force that passes over through moving iron core and secondary valve (claiming again pilot valve), main valve is stressed upon on the sealing surface of valve body, this solenoid valve is in closed condition.During electromagnet energising AC220V10%, the static iron core of electromagnet attracts moving iron core, moving iron core drives secondary valve, sealing between open auxiliary valve and the main valve, gas flow is laid down the air pressure of main valve upper-end surface through the pilot hole in the middle of the main valve, main valve is subject to the active force that gas makes progress, thus the smooth opening main valve, solenoid valve is opened, and gas circuit is unimpeded.During outage, electromagnet suction disappears, and moving iron core is closed rapidly pilot valve and main valve under the effect of spring force, thus shut electromagnetic valve.

Design parameter of the present utility model is as follows:

Technical parameter

1. inside nominal diameter: 6mm

2. nominal pressure: 25MPa

3. working medium: air, nitrogen, rock gas

4. operating voltage: AC220V, 50Hz

5. operating current: 171mA

6. interface size: G3/8 internal thread

The utility model advantage is as follows:

1) simple in structure: main valve is that whole plastic processing forms, and does not have the joint and seal between part;

2) cost is low: main valve changes into by after the whole processing of PEEK (polyether-ether-ketone), the comprehensive process performance is good, add man-hour needed cutter and the check measurer few, operation is succinctly simple, shortened greatly the manufacture cycle of main valve, overall cost only has about 60% of original split type main valve cost;

3) life-span is long: because the PEEK quality of materials is light, the nonmetal sealing material of the more former main valve of hardness (Fs-3) height, but be lower than the hardness of steel (0Cr18Ni9), therefore it is little much to the impact of the nonmetal sealing surface of secondary valve under high pressure and High Pressure Difference condition, prolonged the working life of secondary valve, simultaneously, the sealing pair situation of main valve and valve body is similar;

4) potential faults is few: main valve adopts whole plastic processing, the quality of plastics is softer, some minute impurities can embed in the main valve under the effect of frictional force, therefore, this main valve exists must water environment capacity, because the main valve structure behind the remodeling is simple, part is few, do not exist to connect the problems such as loosening, so the probability that breaks down also reduces greatly.In addition, processed 4 dump tanks on the circumference of main valve, the existence of this dump tank has not only reduced the flow resistance of gas, and be convenient in the medium fifth wheel and discharge smoothly, reduce solenoid valve because of the rate of fault of fifth wheel clamping stagnation, simple in structure, using effect good, has good economic and social benefit.

Claims

1. explosion-proof guide electromagnetic valve, comprise valve body, it is characterized in that, main valve (2) is housed in the valve body (1), there is pilot hole (3) at main valve (2) center, valve body (1) one side has entrance (4), opposite side has outlet (5), entrance (4) links to each other with main valve (2) with outlet (5), the pilot hole (3) of main valve (2) is connected 2 with outlet (5) with main valve respectively) top secondary valve (6) is connected, form passage, on main valve (2) periphery wall dump tank (7) is arranged, iron core (8) is arranged at secondary valve (6) top, and moving iron core (8) links to each other with the static iron core (10) on its top by spring (9), has installed around electromagnetic coil (11) on moving iron core (8) and the static iron core (10).

2. explosion-proof guide electromagnetic valve according to claim 1 is characterized in that, described dump tank (7) has 4 at least, is distributed on main valve (2) periphery wall.

3. explosion-proof guide electromagnetic valve according to claim 1 is characterized in that, the integral structure that described main valve (2) is made for plastics.