CN201326807Y - Differential-pressure and environmental-friendly electromagnetic valve - Google Patents

Abstract

Disclosed is a differential-pressure and environmental-friendly electromagnetic valve, which mainly comprises a valve body, a valve cover, a valve core, a valve rod, a valve plug, a returning spring, an electromagnetic coil and an electromagnetic movable iron core. Besides, a water inlet and outlet connected with a valve cavity is mounted on the valve body, an inclined sealing surface is mounted inside the valve cavity, a corresponding inclined angle surface is arranged on the lower portion of the valve core, a sealing ring on the lower portion of the valve core is in the shape of an inclined cone capable of being inserted into a bead inside an inclined sealing surface of the valve body, the sealing ring forms linear seal with the inclined sealing surface placed inside the valve cavity, the valve core is provided with a groove, the valve rod is provided with an auxiliary hook, the auxiliary hook embedded in the groove of the valve core is capable of moving up and down inside the groove, the upper end of the valve rod is connected with a movable iron core, the middle portion of the valve rod penetrates through a valve rod sealing ring mounted in the middle of the valve cover, the lower portion of the valve rod is provided with the valve plug, and the plug is engaged with a valve core upper sealing ring fixedly connected to the valve core. The utility model has the advantages of simple structure, large flow channel cross-section, adequate flow rate, easy opening and closing and reliable quality. Besides, the inside structure of the utility model made of engineering plastics is environmental-friendly and non-corrosive, thereby the utility model has long service life and wide scope of application.

Description

Pressure reduction environment protection type solenoid valve

Technical field

The utility model relates to a kind of differential pressure open-close spool that utilizes, be applicable to the solenoid valve of fluid auto switching control system, can be applicable to the solenoid valve of the industries such as industrial chemical industry, fire-fighting of clear water and different medium pipe stream, belong to the valve class.

Background technique

At present, traditional solenoid valve generally is divided into film body formula solenoid valve and piston type electromagnetic valve.The solenoid valve of which kind of form no matter, all there is following drawback in the design of its pilot hole, it at first is diaphragm electromagnetic valve, its pilot hole is aperture as one and the pin hole to be set as the fluid guide in diaphragm one side, because this hole is too small, stopped up by rust deposite in the pipeline and the impurity in the water easily, cause solenoid valve malfunctioning, a micropore is set and passes the valve gap top inner wall and the pilot hole of piston type electromagnetic valve is a water inlet direction at valve by valve body, fluid by valve body in valve gap advances valve gap, this designs not only complex structure, long flow path and runner bending are easy to be stopped up by the rust deposite impurity in managing, and cause solenoid valve malfunctioning.The pressure relief vent of traditional electrical magnet valve is to offer a micropore in the valve gap inboard and see through valve body guiding water outlet by valve gap, and fluid overflows toward the valve body water outlet through valve during release.So it is complicated that structure seems, and long flow path and circumnutating, the rust deposite that is peeled off by valve gap, valve body, impurity stop up and malfunctioning easily.The traditional electrical magnet valve is because working principle and structure itself need, the basic component of valve are all selected metallic material for use, solenoid valve is installed the inner piece long period of soaking of back valve in medium, easily corrosion, fouling, cause solenoid valve malfunctioning, Returnning spring also all be arranged in the valve pocket and same long period of soaking in medium, corrosion fouling and damage malfunctioning easily.

When the traditional electrical magnet valve was used for fire-fighting, the characteristic that circumnutates because of its runner can't satisfy the requirement that the fire-fighting instantaneous flow must be big and unobstructed.And there is this defective equally in the solenoid valve of using the induction type principle design, and since during differential pressure open-close because of the situation difference of different medium, spool may inadequately can't complete opening because of pressure reduction, causes that runner is not smooth.Chemical valve then needs acid resistant alkali, corrosion protection, and the structure characteristic of traditional electrical magnet valve can't address these problems equally well, thus exist the regularly requirement of maintenance, otherwise corrosion can't guarantee that solenoid valve is because of the use of corrosion long-term safety.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that prior art exists, and provides a kind of simple in structure, and is easy to use, environmental protection, long service life, the pressure reduction environment protection type solenoid valve of applied range.

The purpose of this utility model is finished by following technical solution, it mainly comprises valve body, valve gap, spool, valve rod, valve plug, Returnning spring, electromagnetic coil, the moving iron core of electromagnetism, the intake-outlet that on valve body, does not connect valve pocket, be provided with skewed sealing surface in the described valve pocket, the bottom of spool is provided with corresponding inclination angle face, and the seal ring of spool bottom is the oblique cone shape of bead in the oblique shape sealing surface that can insert valve body, and with valve pocket in the oblique shape sealing surface that is provided with form linear sealing.

Groove is set on the described spool, and described valve rod is provided with the auxiliary hook that is embedded in the spool groove, and this auxiliary hook can move up and down in groove.Described valve rod upper end links to each other with moving iron core, and the valve stem packing ring of settling in the middle of the valve gap, the valve plug that seal ring matches on the spool that the bottom is provided with spool is connected are above passed in the centre; Described valve plug is offered on the pressure relief vent in the middle of directly can being pressed on spool.

This practical solenoid valve fluid guide's design is to utilize the matching gap of the outer of floating plug and valve pocket inwall as the fluid guide.It can not produce any blocking phenomenon to pilot flow greater than the event of traditional electrical magnet valve.In addition, the utility model release design is to offer suitable through hole in the middle of floating plug, and fluid is by this hole release, and the release flow process is short, and pressure relief vent is short straight greater than conventional valve and flow process, can not stop up.The utility model solenoid valve, because of principle of start-stop allows, the medium Returnning spring all is arranged on the valve gap, does not contact; And the component of paddling of the present utility model are selected the high-strength engineering plastic manufacturing for use, and rustless nothing erosion is anticorrosion, but normally uses in the long period of soaking medium.

It is simple and direct that the utility model is not weighed structure, and cross section of fluid channel is big, and flow is abundant, open and close light and handy, reliable in quality, the inner structure engineering plastics are made, environmental protection, non-corroding, life-span are long, applied range.

Description of drawings

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

Embodiment

To describe in detail the utility model by accompanying drawing below.Shown in Figure 1, the utility model mainly comprises valve body 1, valve gap 8, spool 2, valve rod 5, valve plug 14, Returnning spring, electromagnetic coil 16, the moving iron core 9 of electromagnetism, the intake-outlet 10,11 that on valve body 1, does not connect valve pocket 12, be provided with skewed sealing surface 13 in the described valve pocket, the bottom of spool 2 is provided with corresponding inclination angle face, and the seal ring 3 of spool 2 bottoms is the oblique cone shape of bead in the oblique shape sealing surface 13 that can insert valve body, and forms linear sealing with the valve pocket 12 interior oblique shape sealing surfaces that are provided with 13.

Described valve rod 5 is provided with the auxiliary hook 6 that is embedded in the spool groove, and this auxiliary hook 6 can move up and down in groove 15.Auxiliary hook 6 can be lifted on the spool move, also can descend to spool 2 and arrive the sealing position, and the set space of groove 15 is vacant relatively, so work as spool under the effect of fluid pressure difference, during trouble-free operation, auxiliary hook is in not as state, can't go up keying and work as spool because of the fluid effect, then link up with after having moved the room, arrive groove top resistance gear, then this moment, hook began to lift spool, play the unlatching effect, can make the spool valve pocket top of going directly, realize the standard-sized sheet of valve, vice versa.Described valve rod 5 upper ends link to each other with moving iron core 9, and the valve stem packing ring of settling on the valve gap 87 is passed in the centre, and the bottom is provided with the valve plug 14 that seal ring 4 matches on the spool that is connected above with spool 2; Described valve plug 14 is offered on the pressure relief vent in the middle of directly can being pressed on spool 2.After the electromagnetic coil energising of solenoid valve, move on the moving sheet iron strip ovable valve stem, spool leaves pilot hole, and spool relies on fluid pressure difference to move upward, and solenoid valve is opened; During the electromagnetic coil outage, valve rod is airtight pilot hole under the effect of Returnning spring power, and spool is closed solenoid valve because of pressure reduction and spring force effect.

Claims (3)

1, a kind of pressure reduction environment protection type solenoid valve, it mainly comprises valve body, valve gap, spool, valve rod, valve plug, Returnning spring, electromagnetic coil, the moving iron core of electromagnetism, the intake-outlet that on valve body, does not connect valve pocket, it is characterized in that being provided with in the described valve pocket (12) skewed sealing surface (13), the bottom of spool (2) is provided with corresponding inclination angle face, and the seal ring (3) of spool (2) bottom is the oblique cone shape of the interior bead of oblique shape sealing surface (13) that can insert valve body, and with valve pocket in the oblique shape sealing surface (13) that is provided with form linear sealing.

2, pressure reduction environment protection type solenoid valve according to claim 1, it is characterized in that described spool (2) is provided with groove (15), described valve rod (5) is provided with the auxiliary hook (6) that is embedded in the spool groove (15), and this auxiliary hook (6) can move up and down in groove (15).

3, pressure reduction environment protection type solenoid valve according to claim 1 and 2, it is characterized in that described valve rod (5) upper end links to each other with moving iron core (9), the valve stem packing ring of settling in the middle of the valve gap (8) (7) is passed in the centre, and the bottom is provided with the valve plug (14) that seal ring (4) matches on the spool that is connected above with spool (2); Described valve plug (14) is offered on the pressure relief vent in the middle of directly can being pressed on spool (2).

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