CN105268077B - Magnetic valve - Google Patents

Abstract

A kind of direct driving type electromagnetic controls fluid switching valve, has particular advantages in terms of sealing security, control security etc., the special construction of electromagnet provides for valve body stably has balanced sealing force；The push-off pin of electromagnet is that two-part stroke structure ensures that under powering-off state valve can be opened safely.The directly operated type electromagnetic switch valve includes valve body and the magnet driver on the outside of the valve body, and electromagnet armature can be movable in coil；Back-moving spring can make armature have the trend for departing from static iron core between armature and shell；Push rod is installed together with armature, and push rod can pass through armature centre bore, and can be slided in hole；Have step in armature centre bore, thrust spring may be mounted inside armature centre bore, and spacing by step, and push rod first end has a step, and can limit thrust spring position, the stroke of electromagnet is comprehensive by the stroke of armature and the stroke of push rod.

Description

Magnetic valve

Technical field

The present invention relates to a kind of fluid control elements, are a kind of direct driving type electromagnetic control fluid switching valves, applied to fluid Control system, in sealing security, response time, there are particular advantages in terms of control security etc., supplied especially suitable for gas System, lung ventilator, Anesthesia machine etc..

Background technology

In Medical Devices, lung ventilator is being set as the safety that a kind of Medical Devices most important condition is user to be ensured Can guarantee that user freely ventilates all the time under the standby various fortuitous events of appearance is most basic safety requirements.In power failure, source of the gas pressure Under the power change fortuitous event such as over range, it is desirable to which magnetic valve is opened, and to ensure the basic autonomous respiration of patient, makes patient will not be because Machine reason produces asphyxia or other dangerous situations.Safety valve disclosed in existing Patent No. CN203591510 patent.

Scheme proposed by the present invention is conceived to electromagnet structure and control aspect to the spy in sealing and the realization of security Different processing, and do and optimize from productibility angle.

The content of the invention

It is an object of the invention to provide a kind of direct driving type electromagnetic to control fluid switching valve, in sealing security, control safety Property aspect etc. have a particular advantages, the special construction of electromagnet provides for valve body stably has balanced sealing force；In controlling party Face, the push-off pin of electromagnet ensure that under powering-off state valve can be opened safely for two-part structure.

The technical solution adopted in the present invention is：The directly operated type electromagnetic switch valve includes valve body and outside the valve body The magnet driver of side, valve body include valve body, valve gland, flap, and electromagnet includes coil, shell, armature, push rod, quiet Iron core, thrust spring, back-moving spring, snap ring；There are two passages on valve body, one of passage is in valve body inner opening periphery There is valve seat, valve gland is installed on valve body, and flap is between valve gland and valve seat, and flap periphery is by valve gland peripheral projection It is pressed on valve body, and above-mentioned two passage is isolated with solenoid part；In coil placement shell, armature, static iron core pass through line Circle, armature can be movable in coil；Back-moving spring can have armature and depart from becoming for static iron core between armature and shell Gesture；In coil electricity, armature is bonded with static iron core, and when the coil is de-energized, back-moving spring causes armature to depart from static iron core, this shape Into the first stroke of electromagnet；Push rod is installed together with armature, and push rod passes through armature centre bore, and thrust spring is installed on armature Between push rod, both ends are against on the step of armature and push rod respectively, and push rod can be promoted to have outside cunning in armature centre bore Dynamic trend, snap ring are installed on push rod one end, can limit sliding distance of the push rod in armature；Slip model of the push rod in armature Enclose the second stroke for electromagnet；Electromagnet is installed on valve body, and valve gland is between valve body and electromagnet；In electromagnetism During Tie Tong electricity, armature starts close to static iron core, and flap through valve gland and is pressed to valve seat by push rod under the drive of armature, in valve When valve contacts with valve seat, push rod meets obstructions, and starts to compress thrust spring and is slided in armature, now armature continues close to quiet Iron core；When armature reaches the attracted position of electromagnet setting, the power that push rod is acted on flap is that thrust spring is applied, The far smaller than now the suction-combining force of electromagnet, it can not only ensure between flap and valve seat reliably sealing but also excessive power can be avoided Caused by flap and valve seat injure.

The beneficial effects of the invention are as follows the electromagnet using two sections of strokes, ensures the sealing force stabilization provided, ensures sealing While will not due to it is excessive to caused by valve injury.

Brief Description Of Drawings

Fig. 1 is the schematic diagram of structure 1 of the present invention

The push rod of code name 1. in figure, 2. end back-up rings, 3. armature, 4. thrust springs, 5. back-moving springs, 6. electromagnet casings, 7. coil, 8. static iron cores, 9. top back-up rings, 10. valve glands, 11. flaps, 12. valve seats, 13. valve bodies, 14. passages one, 15 is logical Road two

Embodiment

The directly operated type electromagnetic switch valve includes valve body and the magnet driver on the outside of the valve body, valve body bag Include valve body 13, valve gland 10, flap 11, electromagnet includes coil 7, electromagnet casing 6, armature 3, push rod 1, static iron core 8, pushed away Power spring 4, back-moving spring 5, end back-up ring 2, top back-up ring 9；There are two passages on valve body 13, passage 1, passage 2 15, One of passage has valve seat 12 in the inner opening periphery of valve body 13, and valve gland 10 is installed on valve body 13, and flap 11 is located at Between valve gland 10 and valve seat 12, the periphery of flap 11 is pressed on valve body 13 by the peripheral projection of valve gland 10；Coil 7 disposes electromagnetism In iron shell 6, armature 3, static iron core 8 pass through coil 7, and armature 3 can be movable in the centre bore of coil 7；Back-moving spring 5 is positioned at rank Between iron 3 and electromagnet casing 6, armature 3 can be made to have the trend for departing from static iron core 8；When coil 7 is powered, armature 3 and quiet iron Core 8 is bonded, and when coil 7 powers off, back-moving spring 5 causes armature 3 to depart from static iron core 8, and this forms the first stroke of electromagnet；Push away Bar 1 is installed together with armature 3, and push rod 1 passes through the centre bore of armature 3, and thrust spring 4 is installed between armature 3 and push rod 1, bullet The both ends of spring 4 are against on the step of armature 3 and push rod 1 respectively, and push rod 1 can be promoted to have what is slid in and out in the centre bore of armature 3 Trend, end back-up ring 2 are installed on the one end of push rod 1, can limit sliding distance of the push rod 1 in armature 3；Push rod 1 is in armature 3 Sliding scale is the second stroke of electromagnet；Electromagnet is installed on valve body 13, and valve gland 10 is located at valve body 13 and electromagnetism Between iron；When electromagnet is powered, armature 3 starts close to static iron core 8, and push rod 1 is passed through on valve gland 10 under the drive of armature 3 Through hole, flap 11 is pressed into valve seat 12, when flap 11 contacts with valve seat 12, push rod 1 meets obstructions, and starts in armature 3 Interior to slide and compress thrust spring 4, now armature 3 continues close to static iron core 8；The adhesive position of electromagnet setting is reached in armature 3 When putting, the power that push rod 1 is acted on flap 11 is that thrust spring 4 is applied, now due to the contact of flap 11 and valve seat 12 Sealing, separates between passage 14 and passage 15；When electromagnet powers off, electromagnetic force disappears, and armature 3 is in back-moving spring 5 and pushes away Start in the presence of power spring 4 away from static iron core 8, push rod 1 slides in the presence of thrust spring 4 in armature 3, and still makes Contacted between flap 11 and valve seat 12, when armature 3 is moved to flap 11 and starts to depart from valve seat 12, push rod 1 stops in armature 3 Slide, and it is simultaneously mobile with armature 3, when on top, back-up ring 9 touches electromagnet casing 6, armature 3 and the stop motion of push rod 1, lead to Connected between road 14 and passage 15.

Claims (3)

1. a kind of electromagnetism Direct Action Type diaphragm valve, including valve body and the electromagnet on the outside of the valve body；Valve body includes valve sheet Body, valve gland, flap；Electromagnet include coil, electromagnet casing, armature, push rod, static iron core, thrust spring, back-moving spring, First locating part, the second locating part；There are first passage and second channel on valve body, in first passage opening on the inside of valve body There is valve seat on mouth periphery；Valve gland is installed on valve body, and flap is between valve gland and valve seat, and flap periphery is by valve gland week Side projection is pressed on valve body；In coil placement electromagnet casing, armature, static iron core pass through coil, and armature slides in coil； Back-moving spring makes armature have the trend for departing from static iron core between armature and static iron core；In coil electricity, armature and quiet iron Core is attracting, and armature reaches first position, and when the coil is de-energized, back-moving spring causes armature to depart from static iron core, due to locating part Armature be present and reach the second place；Push rod is installed together with armature, and push rod passes through armature centre bore, and thrust spring is installed on rank Between iron and push rod, both ends are against on armature and the step of push rod first end respectively, promote push rod oriented in armature centre bore The trend of outer slip, the first locating part are installed on the projection that push rod first end passes through armature, can limit push rod in armature Sliding distance；The end of push rod second reaches opposite side through static iron core, and the second locating part is installed on the end of push rod second and protrudes quiet iron Core segment, the shift length of armature can be limited；Electromagnet is installed on valve body, valve gland be located at valve body and electromagnet it Between；When electromagnet is powered, armature starts close to static iron core, and push rod through valve gland and presses to flap under the drive of armature Valve seat, when flap contacts with valve seat, push rod meets obstructions, and starts to compress thrust spring and is slided in armature, now armature Continue close to static iron core；When armature reaches first position, the power of thrust spring is acted on flap by push rod so that flap Sealing, first passage and second channel cut-off are contacted with valve seat；When electromagnet powers off, electromagnetic force disappears, and armature is resetting bullet Start to slide in armature in the presence of thrust spring away from static iron core, push rod in the presence of spring and thrust spring, and according to So make to contact between flap and valve seat, when armature is moved to the second place, flap departs from valve seat, and first passage and second leads to Connected between road.

2. electromagnetism Direct Action Type diaphragm valve according to claim 1, it is characterized in that armature and static iron core have centre bore, push rod is worn Above-mentioned centre bore is crossed, and is slided in hole.

3. electromagnetism Direct Action Type diaphragm valve according to claim 1, it is characterized in that having step, thrust spring in armature centre bore Inside centre bore, and spacing by step, push rod first end has a step, and can limit thrust spring position.