CN2079243U

CN2079243U - Magnetic check valve

Info

Publication number: CN2079243U
Application number: CN 90215007
Authority: CN
Inventors: 邹立本
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1991-06-19

Abstract

The utility model relates to a magnetic check valve, which can prevent a pipeline from the backflow of the gas and the water. The middle portion of the passage of the magnetic check valve is provided with two permanent magnets with the same magnetic pole on the adjacent ends, and the diameter of the permanent magnets is slightly smaller than the inner diameter of the passage. When the gas and the water generate the reflux, under the functions of the backflow pressure of the gas and the water and the repulsion force between the two permanent magnets, the magnetic check valve can automatically revert and shut through acceleration to prevent the backflow of the gas and the water. The magnetic check valve which has the advantages of simple structure, small size, safe performance, and convenient usage can be used for the fields, such as a sprayer, an inflating pump, etc., but also can be used as a safety valve and a drainage valve, and the magnetic check valve can be used as a flash back arrester which can prevent the acetylene.

Description

Magnetic check valve

The utility model relates to a kind of magnetic check valve that prevents pipeline gas, aqueous reflux.

Safety check at present commonly used is generally two kinds of rise-fall type and rotary-open types.The flap of Lift check valve is perpendicular to valve channel and does elevating movement, and is uncontrollable because flap counterweight or spring pressure are changeless, thereby resistance is bigger, and employed pipeline inside nominal diameter also is subjected to certain limitation.Swing check valve is that flap centers on sealing surface and rotates, and relies on the pressure difference of both sides to reach sealing, thereby sealability is relatively poor during low pressure.The safety check general appearance of these two kinds of structures is complicated, and volume is bigger.Valve body mostly is foundry goods, complex manufacturing, and cost is higher, and mounting point and using scope all are subjected to certain limitation.Especially spring structure safety check, not only this body structure of spring is restricted, and easily be bullied, the etch of aqueous medium, thereby cause out of control or leak.

The purpose of this utility model is to provide a kind of one way stop peturn valve that substitutes existing counterweight or pressure spring rise-fall type with magnetic force.It is to utilize two repulsive forces between the permanent magnet, relies on gas, the differential water pressures of both sides to make automatic on-off, the utlity model has simple in structure, volume is less, both sides pressure reduction can be regulated, and the mounting point is unrestricted, abrasion-proof corrosion-proof, low production cost, the advantage that using scope is wider.The deficiency that has replaced some practical safety check.

The purpose of this utility model realizes by following technological scheme.A kind of gas that prevents, the magnetic check valve of aqueous reflux, it is characterized in that at valve body (1) along gas is arranged on the axial direction, water channel, channel middle is equipped with two permanent magnets (7) and (8), the abutting end magnetic pole of two permanent magnets is identical, being the state that repels each other also can be free to slide at valve body both sides pressure reduction and magnetic force lower edge valve channel axial direction, permanent magnet (7), (8) have arcuate socket (11) on the edge, by brushing on the surface of feeder connection end one side the rubber layer (6) that seals is arranged at permanent magnet (7), by valve channel gas, water inlet end one side is equipped with inlet lining (2), and the external diameter of its taper flange annular sealing surface (5) is opened the actual internal surface of the permanent magnet (7) of arcuate socket (11) less than the edge.Under gas, water pressure and magnetic force, sealing surface (5) is brushed the side that rubber layer (6) is arranged with permanent magnet (7) and formed the keying sealing surface, on the inlet lining (2) filter screen (4) is housed, and is fixing with the Steel Cable Baffle Ring (3) of inlay busher circular groove.By valve channel outlet end one side the outlet lining (10) that can be the shoulder hole shape along the upper and lower adjusting of valve axis direction is housed, wherein has some inclined holes (9) on the terrace and communicate with valve channel.The join external diameter of contravention of outlet lining (10) and permanent magnet (8) must be opened the internal surface of the permanent magnet (8) of arcuate socket less than the edge.Outlet lining (10) and inlet lining (2) are spiral marking connection with valve body, make it to lean with permanent magnet (7) and (8) respectively.

By adjusting the screw thread on the outlet lining (10), outlet lining (10) is moved in certain stroke range against permanent magnet (8) along the valve axis direction, thereby the mutual expelling force size between two magnets is regulated.

Fig. 1 is the half sectional view of the utility model structure.Fig. 2 is the working principle half sectional view of the utility model when gas, the circulation of water forward.Fig. 3 is the utility model is in non-return state when gas, aqueous reflux a working principle half sectional view.Fig. 4 be Fig. 3 A-A direction to view, it has shown that the edge opens the shape of the permanent magnet of arcuate socket (11) (7), (8).As shown in Figure 2: gas, water are washed permanent magnet (6) open from the filter screen (4) of ingress on inlet lining (2) and are entered valve channel, two diameters of flowing through are slightly less than inclined hole (9) output of permanent magnet (7), (8), arcuate socket (11) and the outlet lining (10) of passage internal diameter, are normal working.The outlet lining can wherein have inclined hole (9) and communicate with valve channel along the certain stroke of the upper and lower adjusting of valve axis direction on the terrace.As shown in Figure 3: when gas, water become the refluence state for some reason, back-pressure gas, water major part blow back into outlet lining (10) rapidly, thereby back down permanent magnet (8), a part of back-pressure gas, water are by inclined hole (9), enter valve channel by the arcuate socket on the permanent magnet (8) again, permanent magnet this moment (7) quickens to automatically reply to close under the gas of the repulsion of permanent magnet (8) and refluence, water back-pressure, is non-return state.In case the obstruction in the pipe is excluded, its non-return state is eliminated thereupon, and permanent magnet (7), (8) in the valve body automatically reset to the normal feed status as Fig. 2.

The utility model not only is useful for various high low pressure pipelines, also can be used as to prevent that acetylene tempering safety installations from using, and also can be used for aspects such as sprayer, liquid suction, pump, also can be used as safety valve, drain valve is used for low temperature, low pressure occasion.Therefore has purposes widely.

Because the magnetic of permanent magnet is subjected to factors of affecting such as environment, temperature, time, stress, thus the utility model should not use at high temperature, under the working environment that vibrated, impact.

Following is an embodiment of the present utility model, the valve body material selects for use copper content not to be higher than 70% Cuprum alloy, the valve body external diameter is φ 21mm, internal diameter is φ 16mm, length is 50mm, and two permanent magnets adopt nickel zinc permanent-magnet ferrite, are of a size of φ 16mm, thick 5mm, the edge symmetry is opened six plum blossom shape arcuate sockets.With of threaded joint place of this control valve unit in the acetylene supplying tube of the weldering of jet-absorption type oxygen one alkynes flame, cutting torch rear portion junctor, make " anti-acetylene flashback arrester " and use confirmation, the utility model to end fire rapidly, sealing surface does not have carbon black and occurs, shorten simultaneously and end fiery distance, respond well.

Claims

1, a kind of magnetic check valve is characterized in that:

A. valve body (1) has a gas, water channel along axial direction, channel middle is equipped with two and can slides along axial direction, the permanent magnet that adjacent pole is identical (7) and (8), permanent magnet (7), (8) edge have arcuate socket (11), and permanent magnet (7) has the rubber layer (6) that seals by brushing on the surface of feeder connection end one side;

B. by valve channel gas, water inlet end one side inlet lining (2) is housed, the external diameter of its taper flange annular sealing surface (5) is opened the actual internal surface of the permanent magnet (7) of arcuate socket (11) less than the edge, brushes the side that rubber layer (6) is arranged with permanent magnet (7) and form and open and close sealing surface under gas, water pressure and magnetic force;

C. be equipped with and be the poroid outlet lining (10) of ladder along valve axis direction up-down adjustment by valve channel outlet end one side, have inclined hole (9) and communicate with valve channel on the middle terrace of outlet lining (10), the join external diameter of contravention of outlet lining (10) and permanent magnet (8) must be opened the internal surface of the permanent magnet (8) of arcuate socket less than the edge.

2, according to the described magnetic check valve of claim 1, it is characterized in that entering the mouth lining (2) and outlet lining (10) are scyewed joint with valve body (1).

3, according to the described magnetic check valve of claim 1.2, on the lining (2) that it is characterized in that entering the mouth filter screen (4) is housed, and with Steel Cable Baffle Ring (3) that filter screen (4) is fixing.