CN2188153Y - External force starting type safety selenoid valve - Google Patents

Abstract

The utility model discloses an external force starting type gas safety magnet valve. A magnet I, a magnet II and a coil which form a magnetic return path are arranged in a valve body, and an outgoing line is connected with an external circuit; a push rod which can move under the condition of exogenic action forms a sliding fit with a spring push rod, the magnet II, and a sealing pad used to open and close a valve port and the spring push rod synchronously move through the attractability of the two magnets to achieve the purposes of opening and closing the valve port, regulating the quantity of flow of the gas and protecting safety when abnormal phenomena appear. The utility model improves the movable air gap face between a case and the magnet and the magnets which is generated through the structure of the case and the magnet in the magnetic return path of the primary technology and overcomes the defects of big movable air gap face and big magnetic loss, and so the utility model has the advantages of safety, electricity saving, energy consumption, simple structure and low cost.

Description

External force starting type safety selenoid valve

A kind of external force that the utility model relates to the combustion gas tool starts the formula security solenoid valve.

Development along with the combustion gas industry; various security solenoid valves have appearred in the combustion gas tool; safety protection task when these solenoid valves are being undertaken the adjusting of keying, gas quantity of blast tube and the termination air feed that causes as flame-out, anoxic, overheated etc. because of fortuitous event, the most widely used in recent years electromagnetic type external force that the electromagnetism self-priming valve is arranged and brought into use starts the gas safe control gear.The former provides heavy current to coil by external electric field, makes it to produce big electromagnetic force and opens blast tube, after a period of time, convert little electric current to by heavy current, it is maintained the statusquo, electromagnetic force disappears when cutting off electric current, close the combustion gas road, this valve exists heavy current and starts, and power consumption is big.The latter has overcome big current start, the big shortcoming of power consumption when having changed the electromagnetism self-priming valve to a certain extent and starting, but since unreasonable on himself technical pattern, still exist defective, it by decide magnet, initiatively magnet, passive magnet, shell are formed a magnetic circuit integral body, moving air-gap surface is big, and magnetic loss severity increases work capacity, though it is more energy-conservation than the former, but it is big to exist power consumption equally, and processed complex, many shortcomings such as manufacture cost height.

The purpose of this utility model is to avoid the defective of prior art and provides a kind of external force of low energy consumption to start the formula security solenoid valve, and it also is another purpose of the present utility model that simplified structure reduces cost.

Realize that the purpose of this utility model promptly is equipped with the magnet I and the magnet II that can self form magnetic loop under electromagnetic field effect in the valve body of being made of shell and outer housing cover, be wound with coil on the magnet I, two magnets have the adhesive face of being close to, and lighting outlet picks out the connection external circuit by coil tap; Be slidingly matched by the push rod and the spring push-rod of external force effect, the sealing gasket that opens and closes valve port is inlaid on the spring push-rod, the magnet II is connected one with spring push-rod, and magnet, sealing gasket be provided with Returnning spring, the blast tube function is closed in realization, and the axial displacement of sealing gasket has determined the gas flow size.When fortuitous event occurring, support circuit cuts off coil current, and magnetic force disappears and then closes blast tube and realize safety protection function.

This solenoid valve has overcome the defective of prior art, and the magnetic loop that utilizes magnet self to form makes magnetic loss little, and is safe and power saving, reduces greatly because of simplified structure makes volume simultaneously, has reduced manufacture cost, is a kind of low energy consumption, solenoid valve cheaply.

Accompanying drawing 1 provides structural representation of the present utility model.

Describe in further detail by 1 pair of the utility model of accompanying drawing below.

The valve body that external force starts formula gas safe solenoid valve is formed by fixedly connecting by shell (1) and outer housing cover (11), magnet I (3) that can form magnetic loop and the magnet II (5) made by soft magnetic material are housed in the valve body, and two magnets have the adhesive face of being close under electromagnetic field effect.Magnet I (3) goes up coiling electromagnetic coil (4), and lead-out wires of coil (12) connects outer control circuit, and magnet I (3) preferably is supported in the skeleton (2), make Returnning spring (13) by skeleton function on magnet.Be subjected to the push rod (9) of external force effect to withstand on skeleton (2) inner side surface, be slidingly matched, and spring push-rod (6) is slidingly matched, and seal ring all is housed on the two junction, prevents that gas leakage from entering body cavity with outer housing cover (11) with spring push-rod (6).The sealing gasket (8) that opens and closes valve port is inlaid on the spring push-rod (6), magnet II (5) reaches the riveted joint one with being connected by the enlarging of spring push-rod end endoporus is processed of spring push-rod (6), makes magnet II (5), spring push-rod (6) and the whole synchronization motion of sealing gasket (8).And between outer housing cover and sealing gasket, be equipped with the supporting Returnning spring (10) poppet (7).

The external force F that acts on the push rod (9) can be mechanism's power of manually promotion or electric transmissio mechanism, also can be hydraulic coupling, can also be electromagnetic force, is provided by match mechanism.

The dynamic structure of this valve is as follows:

When no external force F, push rod (9) is the home position, magnet I (3) and magnet II (5) are close to the good adhesive face of formation mutually under spring (13) active force, also restore with spring push-rod (6), the sealing gasket (8) of magnet II (5) riveted joint one, promptly be in and close the blast tube position.

Under external force F effect, supporting with it control circuit output current makes the coil (4) on the magnet I (3) produce magnetic field, and magnet I, II are under the magnetic force effect, adhesive mutually, push rod (9) moves to left, and balladeur train (2) and magnet I, II (3), (5) are moved to left simultaneously, and drives spring push-rod (6) and sealing gasket (8) moves to left synchronously, blast tube is promptly opened, the displacement amount of the size decision push rod (9) of external force has promptly determined gas flow, realizes the function that gas flow is regulated.External force disappears, and above-mentioned other part that moves to left resets under spring (10) active force, promptly recovers initial position, closes blast tube.

When external force F effect exists and combustion gas tool when being in the blast tube opening state; owing to occur accidental cause (as flame-out, anoxic, overheated or the like) in the combustion process; supporting with it circuitry cuts coil current; magnetic force disappears; two magnet suction disappear; magnet II (5), spring push-rod (6), sealing gasket (8) reset under spring (10) effect, and blast tube is closed, thereby reaches the purpose of safety protection.Though this moment external force still exist, push rod (9) still is in not reset position, also do not influence closing of blast tube.

Claims (1)

1, a kind of external force starts formula gas safe solenoid valve, in the valve body of being made up of shell (1), outer housing cover (11) magnet is housed and is wound on coil (4), lead-out wires of coil (12) on the magnet; Be slidingly matched with spring push-rod (6) by the push rod (9) of external force effect; The sealing gasket (8) that opens and closes valve port is inlaid on the spring push-rod (6), and Returnning spring (13), (10) that magnet and sealing gasket are provided with, it is characterized in that described magnet is included in the magnet I (3) and the magnet II (5) that can form magnetic loop under the electromagnetic field effect, two magnets have the adhesive face of being close to.