CN201661752U - Non-pressure solenoid valve - Google Patents

Abstract

The utility model relates to a non-pressure solenoid valve which comprises a valve body, a membrane, a sealing sleeve, an iron core, a lower iron plate, an upper yoke iron, a magnetic-conductive ring and a coil, wherein the magnetic-conductive ring is respectively fixed on the lower iron plate and the upper yoke iron, the coil is arranged between the lower iron plate and the upper yoke iron, the lower iron plate and the upper yoke iron are riveted into a whole by stamping to be assembled on the valve body, the sealing sleeve is arranged on the inner wall of a valve cavity, the outer periphery of the membrane is connected with the sealing sleeve to form an inner cavity, the iron core is arranged in the inner cavity, a spring is sleeved at the upper end of the iron core, and a rubber cap is arranged at the lower end of the iron core; and the non-pressure solenoid valve is characterized in that a movable bracket is sleeved on the membrane, the lower end part of the iron core extends into the movable bracket and is positioned above a central hole on the movable bracket, and a clamp spring for movably connecting the movable bracket and a concave part at the lower end of the iron core is arranged in a groove at the upper part of the movable bracket. The utility model better solves the problem of smaller flow of the present water inlet valve under the low water pressure and has the advantages of simple and reasonable structure, low manufacturing cost and the like.

Description

No pressure electromagnetic valve

Technical field

The utility model belongs to solenoid valve, specifically be a kind of in watering equipments such as water heater, washing machine the no pressure electromagnetic valve of controlled water flow break-make.

Background technique

The entering water electromagnetic valve that is used for controlled water flow in the equipment such as existing washing machine, water heater, the work water pressure scope of setting is 0.02～1.0MPa usually.When solenoid valve is opened,, form the water flowing state by the differential water pressures jack-up seal membrane between valve insertion and the water intake.Sealing when guaranteeing low hydraulic pressure, elastomer diaphragm are designed to form on the end face that certain pressure acts on water outlet.When water intake hydraulic pressure was lower than 0.01MPa, the thrust that differential water pressures forms was not enough to overcome elastomer diaphragm and acts on pressure on the water outlet end face, at this moment, can only form the phenomenon of water clock, can not form normal solid stream of water.At present, products such as washing machine, solar water heater are extensive use of in the rural area, form " tap water " owing to the rural area has much with self-controls such as buckets, and hydraulic pressure is very low, and existing inlet valve is difficult to satisfy usage requirement.Therefore, there is comparatively urgent demand in market to the inlet valve that big flow is arranged under hydraulic pressure 0～0.02MPa.

Summary of the invention

At the problems referred to above, the purpose of this utility model provides a kind of simple and reasonable, no pressure electromagnetic valve that manufacture cost is not high, to solve present inlet valve in low hydraulic pressure (the little problem of flow 0～0.02MPa) time.

The purpose of this utility model realizes as follows: a kind of no pressure electromagnetic valve, comprise valve body, diaphragm, stuffing box gland, iron core, following iron plate, last yoke, magnetic guiding loop, coil, wherein magnetic guiding loop is separately fixed at down on iron plate and the last yoke, coil is located at down between iron plate and the last yoke, following iron plate and last yoke punch riveting are to be assemblied on the valve body after the integral body, stuffing box gland is located at the valve pocket inwall, diaphragm outer periphery and the stuffing box gland formation inner chamber that joins, iron core is located in the inner chamber, the iron core upper end is with spring, the iron core lower end is provided with rubber cap, it is characterized in that being set with on the diaphragm travel(l)ing rest, the iron core underpart is stretched in the travel(l)ing rest and is positioned at center hole top on the travel(l)ing rest, is provided with in the groove on travel(l)ing rest top the jump ring of travel(l)ing rest with the flexible connection of iron core lower end recess.

When iron core is in when the next, under the precompressed elastic force effect of spring, the rubber cap of core ends is blocked the center hole of travel(l)ing rest.The working medium of certain pressure is introduced by the inlet of valve, enters inner chamber through the aperture of diaphragm and travel(l)ing rest periphery, by the pressure difference of medium inside and outside the chamber and the elastic force of spring, diaphragm is close on the Sealing Surface of valve body, this moment closed electromagnetic valve.When coil electricity, iron core overcomes the pre-elastic force and the inside and outside caused pressure of medium differential pressure of spring under the coil magnetic force, upwards promote, and the aperture at travel(l)ing rest center is opened, and the medium that waits is there flowed out downwards, and pressure reduces in the chamber.Because the hydraulic pressure that the peripheral small aperture of travel(l)ing rest, causes inner chamber less than the aperture of central small hole is all the time less than the hydraulic pressure of import.The pressure reduction of import and inner chamber is lifted travel(l)ing rest and diaphragm, and this moment, solenoid valve was opened.Under higher hydraulic pressure, the pressure reduction of import and inner chamber just is enough to keep the state that lifts of travel(l)ing rest and diaphragm.When being in low hydraulic pressure (＜0.01MPa), the pressure reduction of import and inner chamber is not enough to overcome the precompression that travel(l)ing rest and elastomer diaphragm act on the water outlet sealing surface.At this moment, iron core and no show its finally in the equilibrium position of inner chamber, be subjected to coil suction and move to its equilibrium position, iron core and travel(l)ing rest are connected as a single entity, drive travel(l)ing rest and move together, thus diaphragm is drawn back certain distance from sealing surface, water just can normally flow out.

The utility model is simple and reasonable, manufacture cost is not high, can keep big flow when hanging down hydraulic pressure, can satisfy demand in the market.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Among the figure: 1 expression valve body; 2 expression diaphragms; 3 expression travel(l)ing rests; 4 expression stuffing box glands; 5 expression iron cores; 6 expression rubber caps; 7 expression jump rings; 8 expressions are iron plate down; Yoke is gone up in 9 expressions; 10 expression magnetic guiding loops; 11 expression springs; 12 expression coils.

Embodiment

The utility model will be further described below with reference to accompanying drawing and by embodiment.

With reference to Fig. 1, no pressure electromagnetic valve has a valve body 1 that adopts the engineering plastics molding and forming, be respectively equipped with advancing of to link to each other with medium pipeline on the valve body 1, water outlet, magnetic guiding loop 10 is individually fixed in down on iron plate 8 and the last yoke 9, following iron plate 8 and last yoke 9 are used for fixing coil 12, iron plate 8 and last yoke 9 carry out punch riveting under the assembling back, form an integral body with coil 12, and be assemblied on the valve body 1 by screw, stuffing box gland 4 is located at the valve pocket inwall, adopt diaphragm 2 outer peripherys that rubber makes and the stuffing box gland 4 formation inner chamber that joins, the iron core 5 that adopts the good soft magnetic material of magnetic property to make is positioned at inner chamber, there is a rubber cap that is used to seal 6 iron core 5 lower ends, spring 10 is equipped with in the upper end, and spring 10 has certain precompression, is set with travel(l)ing rest 3 on the elastomer diaphragm 2, iron core 5 underparts are stretched in the travel(l)ing rest and are positioned at center hole top on the travel(l)ing rest 3, and a jump ring 7 that travel(l)ing rest 3 and iron core 5 lower end recesses are flexibly connected is arranged in the groove on travel(l)ing rest 3 tops.When not switching on, under the effect of spring 10 precompressed elastic force, the rubber cap 6 of iron core 5 lower ends is blocked the center hole of travel(l)ing rest 3.Introduce when the aperture of elastomer diaphragm 2 and travel(l)ing rest 3 peripheries enters inner chamber by inlet when working medium,, elastomer diaphragm 2 is close on the sealing surface of valve body 1 by the pressure difference of medium inside and outside the chamber and the elastic force of spring 10.When connecting power supply, coil 12 produces magnetic field, iron core 5 is under magnetic force, overcome the pre-elastic force and the inside and outside caused pressure of medium differential pressure of spring 10, upwards promote, the central small hole of travel(l)ing rest 3 is opened, medium in the chamber is flowed out downwards, pressure reduces in the chamber, and the pressure reduction of import and inner chamber is lifted travel(l)ing rest 3 and elastomer diaphragm 2, and this moment, solenoid valve was opened; Low hydraulic pressure (＜0.01MPa) time, the pressure reduction of import and inner chamber is not enough to jack-up elastomer diaphragm 2.At this moment, iron core 5 and its equilibrium position of no show, under magnetic force, continue up motion, finally be fixed in travel(l)ing rest 3 on jump ring 7 contact, thereby driving travel(l)ing rest 3 and elastomer diaphragm 2 moves upward together, make to form certain space between the water outlet sealing surface of elastomer diaphragm 2 and valve body 1, medium normally flows out from this space.When cutting off the electricity supply, the magnetic field that coil 12 is kept disappears, and iron core 5 resets under the effect of spring 10, blocks the central small hole of travel(l)ing rest 3, thereby realizes closing of solenoid valve.

Claims (1)

1. no pressure electromagnetic valve, comprise valve body (1), diaphragm (2), stuffing box gland (4), iron core (5), following iron plate (8), last yoke (9), magnetic guiding loop (10), coil (12), wherein magnetic guiding loop (10) is separately fixed at down on iron plate (8) and the last yoke (9), coil (12) is located at down between iron plate (8) and the last yoke (9), following iron plate (8) and last yoke (9) punch riveting are to be assemblied in after the integral body on the valve body (1), stuffing box gland (4) is located at the valve pocket inwall, diaphragm (2) outer periphery and stuffing box gland (4) the formation inner chamber that joins, iron core (5) is located in the inner chamber, iron core (5) upper end is with spring (11), iron core (5) lower end is provided with rubber cap (6), it is characterized in that being set with on the diaphragm (2) travel(l)ing rest (3), iron core (5) underpart is stretched in the travel(l)ing rest (3) and is positioned at center hole top on the travel(l)ing rest (3), is provided with in the groove on travel(l)ing rest (3) top the jump ring (7) of travel(l)ing rest with the flexible connection of iron core (5) lower end recess.