CN211550698U - Electromagnetic valve - Google Patents

Abstract

The utility model relates to a solenoid valve technical field, concretely relates to solenoid valve, it includes the valve barrel, the bottom of valve barrel is equipped with the oil-out, the inside of valve barrel is equipped with control piston, control piston's top is equipped with sealing device, sealing device is including the static iron core of locating the compression spring at control piston top, fixed connection and the armature of locating the static iron core outer end, the outside winding of static iron core has the coil, the outside of armature is equipped with armature cover, armature cover is fixed at the top of valve barrel, the outside fixedly connected with seal block of control piston bottom, the outer edge of valve barrel bottom is equipped with the inflow chamber, the valve barrel bottom is equipped with the backward flow chamber along the top that is located the inflow chamber outward, seal block sets up the bottom at the inflow chamber, the inflow chamber communicates with the backward flow chamber each other.

Description

Electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field especially relates to a solenoid valve.

Background

Electromagnetic valves (Electromagnetic valves) are electromagnetically controlled industrial devices, are basic automation elements for controlling fluids, belong to actuators, are not limited to hydraulic pressure and pneumatic pressure, and are used in industrial control systems to adjust the direction, flow rate, speed and other parameters of media. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. There are many types of solenoid valves, with different solenoid valves functioning at different locations in the control system, the most common being one-way valves, safety valves, directional control valves, speed control valves, etc.

Chinese patent publication No. CN 103363123 a discloses a shape memory alloy energized control valve seal assembly and a fluid valve including the same, which includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passage, a valve seat disposed in the fluid passage, a fluid control member movably disposed in the fluid passage, the fluid control member cooperating with the valve seat to control fluid flow through the fluid passage, a seal assembly disposed in the valve body, the seal assembly preventing fluid leakage through the valve body when the fluid control member is in a closed position, the seal assembly being at least partially made of a shape memory alloy.

Although, this fluid valve: in such a fluid valve, when the control piston is closed, high pressure fluid on one side of the valve flows to a lower pressure position on the other side of the valve due to an imbalance of pressure between the fluid inlet chamber and the fluid outlet chamber. Because the existence of the pressure difference enables the fluid on the high-pressure side to flow to the low-pressure area through the clearance between the control piston and the valve sleeve, the control piston must bear strong pressure, and the poor sealing between the control piston and the valve sleeve is easily caused.

Therefore, need use a solenoid valve, can rely on self material structure sealed and sealed reliable, possess wear-resisting characteristics simultaneously.

SUMMERY OF THE UTILITY MODEL

To the above situation, in order to overcome the defects of the prior art, an object of the present invention is to provide a solenoid valve, which has the advantages of easy realization of the on/off of the liquid path and good sealing performance.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an electromagnetic valve, includes the valve barrel, the bottom of valve barrel is equipped with the oil-out, the inside of valve barrel is equipped with control piston, control piston's top is equipped with sealing device, sealing device is including the compression spring, the armature of fixed connection in the quiet iron core at compression spring top and locating the quiet iron core outer end of locating the control piston top, the outside winding of quiet iron core has the coil, the outside of armature is equipped with armature cover, armature cover fixes the top at the valve barrel, the outside fixedly connected with sealing block of control piston bottom, the outer edge of valve barrel bottom is equipped with the inflow chamber, the valve barrel bottom is equipped with backward flow chamber along the top that is located the inflow chamber outward, sealing block sets up the bottom at the inflow chamber, the inflow chamber communicates with the backward flow chamber each other.

Through adopting above-mentioned technical scheme, sealing device passes through the cooperation realization of quiet iron core, armature and control piston, and the seal block is used for keeping apart inflow chamber and backward flow chamber, and according to outside signal, quiet iron core produces the appeal to armature to change the isolated position of seal block, there are two kinds of flow directions in the valve barrel, first are inflow chamber and backward flow chamber intercommunication each other, and second is inflow chamber and oil-out direct intercommunication, and these two kinds of circumstances are two kinds of circumstances that the solenoid valve closed and opened.

Further setting: a filter screen fixed on the valve sleeve is arranged at the position, located in the flow inlet cavity, of the valve sleeve, and the filter screen covers the outer side of the flow inlet cavity.

Through adopting above-mentioned technical scheme, the filter screen can filter the material that enters into the solenoid valve inside.

Further setting: the improved valve is characterized in that a first sealing ring filled outside the static iron core is arranged at the top inside the armature sleeve, second sealing rings are filled on two sides of the top of the valve sleeve, a third sealing ring filled outside the valve sleeve is arranged at the top of the filter screen on the outer side of the valve sleeve, and a fourth sealing ring filled outside the valve sleeve is arranged at the bottom of the filter screen on the outer side of the valve sleeve.

By adopting the technical scheme, the four groups of sealing rings are all used for improving the sealing performance of the inner part and the outer part of the valve sleeve, ensuring the normal work of the inner part of the valve sleeve and ensuring the normal work of the valve sleeve after being installed with external accessories.

Further setting: the top in the valve sleeve is fixedly connected with a wave spring gasket, and the wave spring gasket is arranged at the bottom of the armature.

By adopting the technical scheme, the wave spring washer is used for protecting the lifting movement of the armature, and the armature is prevented from being damaged due to multiple times of impact on the inner wall of the valve sleeve when falling.

Further setting: the outside of third sealing washer is equipped with the first nylon pad of fixing at the valve barrel outer wall, the outside of fourth sealing washer is equipped with the second nylon pad of fixing at the valve barrel outer wall, first nylon pad wraps up in the outside of third sealing washer, the outside of second nylon pad wrapping up in the fourth sealing washer.

Through adopting above-mentioned technical scheme, first nylon fills up and is used for protecting the third sealing washer, and the second nylon fills up and is used for protecting the fourth sealing washer, prevents to produce too much wearing and tearing between third sealing washer, fourth sealing washer and the valve barrel, reduces the life-span of third sealing washer and fourth sealing washer.

Further setting: and a nut for limiting is arranged at the top of the static iron core.

Through adopting above-mentioned technical scheme, the nut is used for restricting the position of quiet iron core.

Further setting: the control piston is made of stainless steel shape memory alloy material.

By adopting the technical scheme, the control piston is made of the memory alloy material, when the temperature rises, the memory alloy expands, the gap between the control piston and the valve sleeve is reduced, and the sealing performance in the electromagnetic valve is enhanced.

To sum up, the utility model discloses following beneficial effect has: can switch the open or closed state of solenoid valve fast through sealing device, the sealing performance of solenoid valve itself is better, simultaneously, is convenient for install control piston, and control piston self has good sealing performance during operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:

FIG. 1 is a schematic view of a solenoid valve in a closed state in embodiment 1;

fig. 2 is a schematic view of the solenoid valve in the open state in embodiment 1.

In the figure, 1, valve housing; 2. an oil outlet; 3. a control piston; 4. a sealing device; 41. a compression spring; 42. a stationary iron core; 43. an armature; 5. a coil; 6. an armature sleeve; 7. a sealing block; 8. a flow inlet cavity; 9. a reflux cavity; 10. a filter screen; 11. a first seal ring; 12. a second seal ring; 13. a third seal ring; 14. a fourth seal ring; 15. a wave spring washer; 16. a first nylon mat; 17. a second nylon pad; 18. and a nut.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1: the utility model provides a solenoid valve, as shown in fig. 1, fig. 2, the outside of solenoid valve is the valve barrel, and the bottom of valve barrel is equipped with the oil-out, and the both sides of valve barrel bottom are equipped with the fourth sealing washer of filling at the valve barrel outer wall, and the fourth sealing washer sets up in the position at oil-out top, and the outside packing of fourth sealing washer has the second nylon pad, and the outside of fourth sealing washer is wrapped up in to the second nylon pad for protect the fourth sealing washer, prevent that it from receiving a large amount of wearing and tearing.

As shown in fig. 1 and 2, a flow inlet cavity is formed in the outer wall of the valve sleeve and located at the top of the fourth sealing ring, the flow inlet cavity extends from the interior of the valve sleeve to the side wall of the valve sleeve, a filter screen fixed on the valve sleeve is arranged outside the flow inlet cavity, and the filter screen is used for filtering materials entering the flow inlet cavity and preventing impurities from entering the interior of the valve sleeve.

As shown in fig. 1 and 2, a third sealing ring is arranged on the outer wall of the valve sleeve and positioned at the top of the filter screen, the outer wall of the valve sleeve is filled with the third sealing ring, a first nylon cushion is arranged outside the third sealing ring, and the first nylon cushion is wrapped outside the third sealing ring and used for protecting the third sealing ring and preventing the third sealing ring from being worn greatly.

As shown in fig. 1 and 2, a backflow cavity is formed in the outer wall of the valve sleeve and located at the top of the third sealing ring, the backflow cavity is communicated with the flow inlet cavity, and a second sealing ring filled on the outer wall of the valve sleeve is arranged on the outer wall of the valve sleeve and located at the top of the backflow cavity.

As shown in fig. 1 and 2, a control piston penetrating through the valve sleeve is arranged in the valve sleeve, the control piston is positioned at the top of the oil outlet, a sealing block is fixedly connected to the outer wall of the bottom of the control piston, the sealing block is tightly propped against the inner wall of the valve sleeve and positioned at the bottom of the flow inlet cavity, and the control piston is made of a stainless steel shape memory alloy material.

As shown in fig. 1 and 2, a sealing device is arranged at the top of the control piston, the sealing device includes a compression spring, a stationary iron core and an armature, the bottom of the compression spring is fixed at the top of the control piston, the top of the compression spring is fixed at the bottom of the stationary iron core, the armature is fixed at the outer end of the control piston and located at the bottom of the compression spring, an armature sleeve is arranged outside the armature, and the armature sleeve is fixed at the top of the valve sleeve.

As shown in fig. 1 and 2, a coil is wound on the outer side of the new top of the static iron, a first sealing ring is filled between the static iron core and the armature sleeve, a nut for limiting is arranged at the top of the static iron core, and the nut is in threaded connection with the top of the armature sleeve.

As shown in fig. 1 and 2, a wave spring washer is fixedly connected to the top of the valve sleeve and is arranged at the bottom of the armature.

The utility model discloses an among the embodiment, the solenoid valve is normally closed state under being in natural state, hugs closely the valve barrel with control piston through compression spring's effect, and at this moment, the circulation control mouth in inflow chamber communicates with each other with the circulation control mouth in backward flow chamber, and the backward flow chamber is linked together with the inflow chamber promptly, and sealed piece supports in the bottom in inflow chamber, and liquid is from the direct inflow backward flow chamber in inflow chamber.

Once the control signal arrives, the armature obtains acting force to compress the spring under the action of the coil, the control piston is pushed to move towards the closing direction of the circulation control port of the backflow cavity, the circulation section of the circulation control port of the backflow cavity is continuously reduced until the circulation control port is closed, the liquid outlet A is opened, namely the electromagnetic valve is opened, at the moment, the electromagnetic valve is in an oil supply state, and the sealing block abuts against the top of the backflow cavity.

After the control signal disappears, the electromagnetic force of the coil also disappears, the control piston returns under the action of the spring, and the electromagnetic valve is closed again at the moment.

Due to the particularity of the material of the control piston, the control piston has relatively low stress at a lower temperature and relatively high stress at a higher temperature, the assembly of the electromagnetic valve is facilitated under the condition of relatively low stress, and the relatively high stress effectively offsets or compensates for different expansion rates of other components of the valve body.

When the system runs for a period of time, the temperature of the fluid rises, the control piston compensates for the fact that the viscosity of the fluid is reduced at high temperature, on the other hand, the gap between the control piston and the valve sleeve is reduced, and after the temperature of the fluid is reduced, the control piston is not blocked at low temperature due to the application of at least part of stainless steel shape memory alloy materials.

The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.

Claims (7)

1. The utility model provides a solenoid valve, includes the valve barrel, the bottom of valve barrel is equipped with the oil-out, its characterized in that: the inside of valve barrel is equipped with the control piston, the top of control piston is equipped with sealing device, sealing device is including the compression spring, the fixed connection of locating the control piston top in the quiet iron core at compression spring top and locate the armature of quiet iron core outer end, the outside winding of quiet iron core has the coil, the outside of armature is equipped with armature sleeve, armature sleeve fixes the top at the valve barrel, the outside fixedly connected with sealing block of control piston bottom, the outer edge of valve barrel bottom is equipped with the inflow chamber, the outer top that lies in the inflow chamber of edge in valve barrel bottom is equipped with the backward flow chamber, sealing block sets up the bottom in the inflow chamber, the inflow chamber communicates with the backward flow chamber each other.

2. A solenoid valve according to claim 1, wherein: a filter screen fixed on the valve sleeve is arranged at the position, located in the flow inlet cavity, of the valve sleeve, and the filter screen covers the outer side of the flow inlet cavity.

3. A solenoid valve according to claim 2, wherein: the improved valve is characterized in that a first sealing ring filled outside the static iron core is arranged at the top inside the armature sleeve, second sealing rings are filled on two sides of the top of the valve sleeve, a third sealing ring filled outside the valve sleeve is arranged at the top of the filter screen on the outer side of the valve sleeve, and a fourth sealing ring filled outside the valve sleeve is arranged at the bottom of the filter screen on the outer side of the valve sleeve.

4. A solenoid valve according to claim 3, wherein: the top in the valve sleeve is fixedly connected with a wave spring gasket, and the wave spring gasket is arranged at the bottom of the armature.

5. A solenoid valve according to claim 4 wherein: the outside of third sealing washer is equipped with the first nylon pad of fixing at the valve barrel outer wall, the outside of fourth sealing washer is equipped with the second nylon pad of fixing at the valve barrel outer wall, first nylon pad wraps up in the outside of third sealing washer, the outside of second nylon pad wrapping up in the fourth sealing washer.

6. A solenoid valve according to claim 5 wherein: and a nut for limiting is arranged at the top of the static iron core.

7. A solenoid valve according to claim 6 wherein: the control piston is made of stainless steel shape memory alloy material.

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