CN211715881U - Pilot-operated electromagnetic stop valve device - Google Patents

Abstract

The utility model discloses a pilot-operated electromagnetic stop valve device, which comprises a valve body, a valve cover, a valve core device and an electromagnetic coil for generating electromagnetic force for absorbing the valve core device, wherein the electromagnetic coil is arranged on the upper part of the valve cover; the valve core device comprises a movable valve core device and a main valve core device, the main valve core device is connected with the movable valve core device, the movable valve core device comprises a movable iron core, a pilot valve core connected with the bottom of the movable iron core and an elastic device used for downwards extruding the movable iron core, and the movable iron core is connected with the elastic device; the main valve element device comprises a main valve element and a pilot hole which is used for contacting with the bottom of the pilot valve element, the lower part of the valve body is provided with an air inlet, an air outlet and a communication port, the communication port is used for communicating the air inlet and the air outlet, and the bottom of the main valve element is contacted with the communication port so as to control the communication port to be opened and closed; the movable iron core and the main valve core are made of metal materials, and the moving stroke of the movable iron core is larger than the operating stroke of the main valve core. The device can effectively improve the operation efficiency of the valve, reduce the operation cost and has simple and reliable structure.

Description

Pilot-operated electromagnetic stop valve device

Technical Field

The utility model relates to a solenoid valve technical field, more specifically say, relate to a guide's formula electromagnetism stop valve device.

Background

Among the prior art, the stop valve is generally including main valve core and the hand wheel that is used for controlling main valve core motion, and this stop valve need be through artifical manual rotation hand wheel to realize opening and closing of stop valve, this process is more wasted time and energy, and opening and closing speed of valve is comparatively slow, and work efficiency is lower.

In addition, the solenoid valve is also commonly used in the prior art to control the opening and closing of the valve, because the solenoid valve has higher working and operating efficiency. However, when the solenoid valve has a larger passage, a larger electromagnetic force is often needed to open the valve, which in turn results in larger power consumption and larger size of the solenoid coil, and finally the solenoid valve has a larger overall structure and higher operation cost.

In summary, it is an urgent need to solve the above-mentioned problems by those skilled in the art to provide a device capable of improving the operation efficiency of a valve and reducing the operation cost.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a guide's formula electromagnetism stop valve device, it can effectively improve valve operating efficiency, and great degree has reduced the produced effort of required solenoid when opening the valve, has reduced solenoid's power to the running cost of device has been reduced, and, this device simple structure is reliable, and the installation of being convenient for is maintained, and the reaction is sensitive, can use widely.

In order to achieve the above object, the present invention provides the following technical solutions:

a pilot-operated electromagnetic stop valve device comprises a valve body, a valve cover connected with the top of the valve body, a valve core device arranged in the valve body and the valve cover, and an electromagnetic coil used for generating electromagnetic force for absorbing the valve core device, wherein the electromagnetic coil is arranged at the upper part of the valve cover;

the valve core device comprises a movable valve core device arranged in the valve cover and a movable main valve core device arranged in the valve body, the main valve core device is connected with the movable valve core device, the movable valve core device comprises a movable iron core, a pilot valve core connected with the bottom of the movable iron core and an elastic device used for downwards extruding the movable iron core, and the movable iron core is connected with the elastic device;

the main valve element device comprises a main valve element and a pilot hole which is used for contacting with the bottom of the pilot valve element, the lower part of the valve body is provided with an air inlet, an air outlet and a communication port, the communication port is used for communicating the air inlet with the air outlet, and the bottom of the main valve element is contacted with the communication port so as to control the communication port to be opened and closed;

the movable iron core and the main valve core are made of metal materials, and the moving stroke of the movable iron core is larger than the running stroke of the main valve core, so that the pilot valve core is separated from the pilot hole when the main valve core is completely opened.

Preferably, a first limit end face for limiting the movement stroke of the movable iron core and a second limit end face for limiting the movement stroke of the main valve core are arranged in the valve cover, and in an initial state, the distance between the top end face of the movable iron core and the first limit end face is larger than the distance between the top end face of the main valve core and the second limit end face.

Preferably, the movable valve element device includes a thimble contacting with the first limiting end surface and a limiting column for limiting a movement distance of the pilot valve element, the thimble penetrates through the top of the movable iron core, the limiting column is connected with the pilot valve element, one end of the elastic device is connected with the thimble, and the other end is connected with the limiting column, so that the thimble limits the elastic device to form an upper limit, thereby applying a downward elastic force to the limiting column, and the elastic device is in a compressed state in an initial state.

Preferably, the movable valve core device is provided with a spring seat for fixing the limiting column and the pilot valve core, a spring is wound on the spring seat, and the spring is in a compression state in an initial state.

Preferably, the spring seat and the movable iron core are detachably connected.

Preferably, the bottom of the spring seat is provided with a boss for clamping and lifting the pilot valve core, so that the pilot valve core is separated from the pilot hole by overcoming pressure difference.

Preferably, in an initial state, a distance between the bottom end face of the pilot valve core and the top end face of the boss is smaller than a distance between the top end face of the movable iron core and the first limit end face, so that the boss can lift the pilot valve core before the movable iron core stops moving.

Preferably, the outer wall of the movable valve core device is nested with a rear plug, the rear plug is detachably connected with the main valve core device, and the rear plug is in clearance fit with the movable valve core device so that the movable valve core device can move relative to the main valve core device.

Preferably, a cavity for accommodating the spring seat and the pilot valve element is arranged at the top of the main valve element device, and the pilot hole is arranged at the center of the cavity, so that the pilot valve element can block the pilot hole.

Preferably, the pilot valve core is a sealing element wrapped with a magnetic conductive material element, so that the pilot valve core can seal the pilot hole and can move under the action of the electromagnetic force.

When using the utility model provides a guide's formula electromagnetism stop valve device, because the pilot valve core can shutoff pilot hole, can be called upper portion cavity with the remaining space between main valve core device upper end and the valve gap lower extreme, called the lower part cavity with the space of main valve core device lower extreme.

When the electromagnetic coil is energized, the movable iron core made of metal can overcome the downward pressure applied to the movable iron core by the elastic device under the action of strong electromagnetic force, and can move upwards. Meanwhile, the pilot valve connected with the movable iron core can also be driven to move upwards, and at the moment, the pilot valve core is separated from the pilot hole, so that the pressure of the upper cavity can be rapidly reduced. The pressure of the upper end of the main valve core is smaller than that of the lower end, so that the main valve core moves upwards under the dual actions of pressure difference and electromagnetic force, the main valve core is separated from the communicating port, namely the valve is opened, the air inlet is communicated with the air outlet, and fluid at the air inlet can flow out to the air outlet through the communicating port, so that fluid transportation is realized.

And because the movement stroke of the movable iron core is greater than the operation stroke of the main valve core, when the main valve core is completely opened, the pilot valve core and the pilot hole are in a separated state, so that the phenomenon that the main valve core moves downwards to the communicating port to isolate the air inlet and the air outlet and suddenly close the valve due to the fact that the pilot valve core is contacted with the pilot hole and a large pressure difference occurs in an upper cavity and a lower cavity is avoided, and the opening state of the main valve core is seriously influenced. Therefore, the moving stroke of the movable iron core is larger than the moving stroke of the main valve core, and the opening state of the main valve core device can be effectively ensured not to be influenced when the power is on.

When the electromagnetic coil is powered off, the movable iron core and the pilot valve core are not adsorbed by the electromagnetic force any more, the movable iron core can move downwards under the action of the elastic device and the action of gravity, and meanwhile, the movable iron core can drive the pilot valve core to move downwards, so that the pilot valve core is contacted with the pilot hole to block the pilot hole, and the pressure of the upper cavity is rapidly increased. Finally, the pressure at the upper end of the main valve core is larger than the pressure at the lower end, so that the main valve core moves downwards under the action of pressure difference, the main valve core is contacted with the communication port, namely the valve is closed, and the air inlet and the air outlet are disconnected, so that fluid leakage is avoided.

The utility model provides a design complicated to traditional valve has been simplified to guide's formula electromagnetism stop valve device, when using the valve body of big latus rectum, only needs to pass through to solenoid circular telegram, can automatic control valve's circulation, can effectively improve valve operating efficiency, and great degree has reduced the required produced effort of solenoid when opening the valve, has reduced solenoid's power to the running cost of device has been reduced.

Furthermore, the utility model provides a guide's formula electromagnetism stop valve device's simple structure is reliable, and the installation of being convenient for is maintained, and the reaction is sensitive, and it can be connected the cooperation with the industrial control computer and use, and in the era that current computer is popularized, it has obvious advantage for traditional governing valve, is convenient for use widely.

To sum up, the utility model provides a guide's formula electromagnetism stop valve device can effectual improvement valve operating efficiency, and great degree has reduced the produced effort of required solenoid when opening the valve, has reduced solenoid's power to the running cost of device has been reduced, and this device simple structure is reliable, and the installation of being convenient for is maintained, and the reaction is sensitive, can use widely.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a pilot-operated electromagnetic stop valve device according to the present invention in an initial closed state;

FIG. 2 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly at the instant of energization;

FIG. 3 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly with the pilot valve spool open;

FIG. 4 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly with the pilot valve spool raised;

FIG. 5 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly with the main spool open;

FIG. 6 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve device in the instant power-off state;

fig. 7 is a sectional schematic view of the pilot-operated electromagnetic shutoff valve device in a state where the main spool is closed.

In FIGS. 1-7:

the valve comprises a valve body 1, a valve cover 2, an electromagnetic coil 3, a movable iron core 4, a pilot valve core 5, an elastic device 6, a main valve core 7, a pilot hole 8, an air inlet 9, an air outlet 10, a first limiting end face 11, a second limiting end face 12, an ejector pin 13, a limiting column 14, a spring seat 15, a spring 16, a boss 17, an upper cavity 18 and a lower cavity 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a guide's formula electromagnetism stop valve device, it can effectively improve valve operating efficiency, and great degree has reduced the produced effort of required solenoid when opening the valve, thereby has reduced solenoid's power reduce cost to, this device simple structure is reliable, is convenient for install and maintains, and the reaction is sensitive, can use widely.

Referring to fig. 1 to 7, fig. 1 is a schematic cross-sectional view of a pilot-operated electromagnetic stop valve device in an initial closed state according to the present invention; FIG. 2 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly at the instant of energization; FIG. 3 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly with the pilot valve spool open; FIG. 4 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly with the pilot valve spool raised; FIG. 5 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve assembly with the main spool open; FIG. 6 is a schematic cross-sectional view of the pilot operated electromagnetic shut-off valve device in the instant power-off state; fig. 7 is a sectional schematic view of the pilot-operated electromagnetic shutoff valve device in a state where the main spool is closed.

The utility model provides a pilot-operated electromagnetic stop valve device, which comprises a valve body 1, a valve cover 2 connected with the top of the valve body 1, a valve core device arranged in the valve body 1 and the valve cover 2 and an electromagnetic coil 3 used for generating electromagnetic force for absorbing the valve core device, wherein the electromagnetic coil 3 is arranged at the upper part of the valve cover 2;

the valve core device comprises a movable valve core device arranged in the valve cover 2 and a movable main valve core device arranged in the valve body 1, the main valve core device is connected with the movable valve core device, the movable valve core device comprises a movable iron core 4, a pilot valve core 5 connected with the bottom of the movable iron core 4 and an elastic device 6 used for extruding the movable iron core 4 downwards, and the movable iron core 4 is connected with the elastic device 6;

the main valve element device comprises a main valve element 7 and a pilot hole 8 which is used for contacting with the bottom of the pilot valve element 5, the lower part of the valve body 1 is provided with an air inlet 9, an air outlet 10 and a communicating port, the communicating port is used for communicating the air inlet 9 with the air outlet 10, and the bottom of the main valve element 7 is contacted with the communicating port so as to control the communicating port to be opened and closed;

the movable iron core 4 and the main valve core 7 are made of metal materials, and the moving stroke of the movable iron core 4 is larger than the running stroke of the main valve core 7, so that when the main valve core 7 is completely opened, the pilot valve core 5 is separated from the pilot hole 8.

It should be noted that the movement stroke of the movable iron core 4 is greater than the operation stroke of the main valve element 7, so that the distance that the movable iron core 4 drives the pilot valve element 5 to move is greater than the movement distance of the main valve element 7, and when the main valve element 7 opens the communication port, the pilot hole 8 in the main valve element 7 does not contact with the pilot valve element 5, so as to avoid affecting the open state of the main valve element 7. Because the movable iron core 4 is arranged in the valve cover 2, the main valve core 7 is arranged in the valve body 1, and the valve body 1 is positioned at the top of the valve cover 2, the movement stroke of the movable iron core 4 and the movement stroke of the main valve core 7 can be limited by arranging a corresponding limiting structure in the valve cover 2, and the limiting structure can be determined according to actual conditions and actual requirements in the actual application process so as to ensure that the movement stroke of the movable iron core 4 is greater than the movement stroke of the main valve core 7.

It should be noted that the plunger 4 and the main valve element 7 are made of metal materials, and are moved upward by receiving the attraction of electromagnetic force when the electromagnetic coil 3 is energized. The concrete material, shape, size, position and the like of the movable iron core 4 and the main valve core 7 can be determined in the actual application process.

The pilot-operated electromagnetic stop valve device provided in the present embodiment is an actuator that controls the fluid passage state by using electromagnetism, and is quick in response, and the response time can be as short as several milliseconds, and is more sensitive than the response of other self-control valves. And, the power that solenoid 3 consumed is very low, can effectual energy consumption of saving. In addition, the pilot-operated electromagnetic stop valve device has compact structure and small overall dimension, and can effectively save space and improve the lightness and the attractiveness of the device. In the actual application process, the structures, the sizes, the shapes, the connection forms and the like of the valve body 1, the valve cover 2, the valve core device and the electromagnetic coil 3 can be determined according to actual conditions and actual requirements.

It should be further explained that, when using the pilot-operated electromagnetic stop valve device provided by the present invention, since the pilot valve element 5 can block the pilot hole 8, the residual space between the upper end of the main valve element device and the lower end of the valve cover 2 can be referred to as an upper cavity 18, and the space at the lower end of the main valve element device is referred to as a lower cavity 19.

When the electromagnetic coil 3 is energized, the movable iron core 4 made of metal can overcome the downward pressure applied to it by the elastic device 6 under the action of strong electromagnetic force, and can move upward. Meanwhile, the pilot valve connected with the movable iron core 4 can also be driven to move upwards, and at the moment, the pilot valve core 5 is separated from the pilot hole 8, so that the pressure of the upper cavity 18 can be rapidly reduced. The upper end pressure of the main valve element 7 is smaller than the lower end pressure, so that the main valve element 7 moves upwards under the dual actions of pressure difference and electromagnetic force, the main valve element 7 is separated from the communication port, namely the valve is opened, the air inlet 9 is communicated with the air outlet 10, and the fluid at the air inlet 9 can flow out to the air outlet 10 through the communication port, so that fluid transportation is realized.

Moreover, because the movement stroke of the movable iron core 4 is greater than the operation stroke of the main valve element 7, when the main valve element 7 is completely opened, the pilot valve element 5 and the pilot hole 8 are in a separated state, so that the phenomenon that the main valve element 7 moves downwards to a communication port to isolate the air inlet 9 and the air outlet 10 and suddenly close the valve due to the fact that the upper cavity and the lower cavity have large pressure difference due to the contact of the pilot valve element 5 and the pilot hole 8 is avoided, and the opening state of the main valve element 7 is seriously influenced. Therefore, the moving stroke of the movable iron core 4 is larger than the running stroke of the main valve core 7, and the opening state of the main valve core device is effectively ensured not to be influenced when the power is on.

When the electromagnetic coil 3 is powered off, the movable iron core 4 and the pilot valve core 5 are not adsorbed by the electromagnetic force any more, the movable iron core 4 moves downwards under the action of the elastic device 6 and the gravity, and meanwhile, the movable iron core 4 drives the pilot valve core 5 to move downwards, so that the pilot valve core 5 is in contact with the pilot hole 8 to block the pilot hole 8, and the pressure of the upper cavity 18 is rapidly increased. The pressure at the upper end of main valve element 7 is finally caused to be higher than the pressure at the lower end, so that main valve element 7 moves downwards under the action of pressure difference, main valve element 7 is contacted with the communication port, namely the valve is closed, and air inlet 9 and air outlet 10 are disconnected, so that fluid leakage is avoided.

The utility model provides a design complicated to traditional valve has been simplified to guide's formula electromagnetism stop valve device, when using the valve body 1 of big latus rectum, only needs to be through the circular telegram to solenoid 3, can automatic control valve's circulation, can effectively improve valve operating efficiency, and great degree has reduced the required effort of solenoid 3 production when opening the valve, has reduced solenoid 3's power to the running cost of device has been reduced.

Furthermore, the utility model provides a guide's formula electromagnetism stop valve device's simple structure is reliable, and the installation of being convenient for is maintained, and the reaction is sensitive, and it can be connected the cooperation with the industrial control computer and use, and in the era that current computer is popularized, it has obvious advantage for traditional governing valve, is convenient for use widely.

To sum up, the utility model provides a guide's formula electromagnetism stop valve device can effectual improvement valve operating efficiency, and great degree has reduced the produced effort of required solenoid 3 when opening the valve, has reduced solenoid 3's power to the running cost of device has been reduced, and this device simple structure is reliable, and the installation of being convenient for is maintained, and the reaction is sensitive, can use widely.

On the basis of the above-mentioned pilot-operated electromagnetic stop valve device, preferably, a first limit end surface 11 for limiting the movement stroke of the movable iron core 4 and a second limit end surface 12 for limiting the movement stroke of the main valve element 7 are provided in the valve cover 2, and in an initial state, the distance between the top end surface of the movable iron core 4 and the first limit end surface 11 is greater than the distance between the top end surface of the main valve element 7 and the second limit end surface 12.

In this embodiment, when the movable iron core 4 moves upward to the first limit end surface 11, the movable iron core 4 cannot move upward continuously, that is, the distance between the top end surface of the movable iron core 4 and the first limit end surface 11 is the movement stroke of the movable iron core 4. Similarly, when main valve element 7 moves upward to second limit end face 12, main valve element 7 cannot move upward continuously, that is, the distance between the top end face of main valve element 7 and second limit end face 12 is the movement stroke of movable iron core 4.

Moreover, because the distance between the top end face of movable iron core 4 and first limit end face 11 is greater than the distance between the top end face of main valve element 7 and second limit end face 12, that is, the movement stroke of movable iron core 4 is greater than the movement stroke of main valve element 7, this is to make the distance that movable iron core 4 drives pilot valve element 5 to move greater than the movement distance of main valve element 7, so that when main valve element 7 opens the communication port, pilot hole 8 in main valve element 7 does not contact with pilot valve element 5, so as to avoid affecting the open state of main valve element 7. Therefore, after the power is supplied, when main valve element 7 moves to second limit end face 12, main valve element 7 can be stably adsorbed at second limit end face 12 without suddenly dropping to the communication port, so that the valve is suddenly closed, and the use effect of the valve device is affected.

It should be added that if the pilot valve core 5 and the movable iron core 4 do not move synchronously, it means that the moving stroke of the movable iron core 4 is greater than the moving stroke of the pilot valve core 5, and at this time, if the moving stroke of the movable iron core 4 is only made greater than the moving stroke of the main valve core 7, it cannot be determined that the pilot valve core 5 and the pilot hole 8 are separated when the movable iron core 4 and the main valve core 7 move to the limiting end surfaces, respectively. Therefore, in this case, it is necessary to determine the moving distance of the pilot valve element 5 when the plunger 4 moves to the first limit end surface 11. It is also necessary to determine the distance pilot bore 8 moves when main spool 7 moves to second limit end face 12. It is finally necessary to ensure that the distance of movement of pilot spool 5 is greater than the distance of movement of pilot bore 8, so as to effectively ensure separation of the two, to avoid affecting the open condition of main spool 7.

In the actual application process, the positions, structures, sizes, shapes and the like of the first limiting end face 11 and the second limiting end face 12 can be determined according to actual conditions and actual requirements, so that the pilot valve element 5 is separated from the pilot hole 8 when the movable iron core 4 and the main valve element 7 move to the limiting end faces respectively.

It should be further noted that, in the present application, the first limiting end surface 11 and the second limiting end surface 12 are mentioned, wherein, the first and the second are only used for distinguishing the difference of the positions and are not sequentially distinguished.

On the basis of the above-mentioned pilot-operated electromagnetic shutoff valve device, preferably, the movable valve element device includes a thimble 13 for contacting the first limiting end surface 11 and a limiting column 14 for limiting a movement distance of the pilot valve element 5, the thimble 13 passes through the top of the movable iron core 4, the limiting column 14 is connected to the pilot valve element 5, one end of the elastic device 6 is connected to the thimble 13, and the other end is connected to the limiting column 14, so that the thimble 13 forms an upper limit on the elastic device 6, thereby applying a downward elastic force to the limiting column 14, and the elastic device 6 is in a compressed state in an initial state.

Preferably, the movable valve core device is provided with a spring seat 15 for fixing the limiting column 14 and the pilot valve core 5, a spring 16 is wound on the spring seat 15, and the spring 16 is in a compression state in an initial state.

Therefore, in the initial state, when the electromagnetic coil 3 is not energized yet, the elastic device 6 is in a compressed state, and it will apply a downward thrust to the lower limit post 14, so that the pilot valve core 5 effectively blocks the pilot hole 8 to isolate the upper cavity 18 and the lower cavity 19. At this time, the spring 16 on the spring seat 15 is also in a compressed state, and the spring 16 presses the spring seat 15 downward, thereby further ensuring that the pilot valve element 5 tightly blocks the pilot hole 8.

In the actual application process, the structure, size, shape, position and the like of the thimble 13, the limiting column 14, the elastic device 6 and the spring seat 15 can be determined according to the actual situation and the actual requirement.

On the basis of the pilot-operated electromagnetic shutoff valve device, the spring seat 15 and the movable iron core 4 are preferably detachably connected.

Therefore, the spring seat 15 can move synchronously with the plunger 4. And, set up spring holder 15 and movable iron core 4 as detachable connection, be favorable to improving the life of device. If the part damage phenomenon appears in spring seat 15, movable iron core 4 or the pilot valve core 5 in the spring seat 15, spacing post 14, then can be through dismantling the processing to the two, change the damage part again to make new part continue to use with the cooperation of other parts that do not damage, with the life of improvement device and the cost of maintenance who reduces the device.

Preferably, one of the spring seat 15 and the movable iron core 4 may be provided with an external thread, and the other one may be provided with an internal thread having a size matched with that of the external thread, so that the spring seat 15 and the movable iron core 4 are fixedly connected.

Of course, the spring seat 15 and the movable iron core 4 may be fixedly connected through a detachable connection manner such as riveting or buckling. Therefore, the connection mode of the spring seat 15 and the movable iron core 4 can be determined according to actual conditions and actual requirements in the actual application process.

On the basis of the pilot electromagnetic stop valve device, preferably, the outer wall of the movable valve core device is nested with a rear plug, the rear plug is detachably connected with the main valve core device, and the rear plug is in clearance fit with the movable valve core device so as to enable the movable valve core device to move relative to the main valve core device.

Preferably, an internal thread can be arranged on the inner wall of the top of the main valve element device, and an external thread matched with the internal thread is arranged on the outer wall of the rear plug, so that the main valve element device is fixedly connected with the rear plug.

Of course, the connection mode between the main valve element device and the rear plug is not limited to threaded connection, and the main valve element device and the rear plug can be connected in a riveting mode, an interference fit mode, a buckling mode and other connection modes. In the actual application process, the connection mode between the rear plug and the main valve element device and the like can be determined according to the actual situation and the actual requirement.

Preferably, one end of the spring 16 is connected with the rear plug, and the other end is connected with the spring seat 15, so as to better connect the main valve core and the movable iron core. After the power is switched on, the movable iron core is acted by electromagnetic force and can overcome the resistance of the spring 16 to move upwards.

It should be noted that the main valve core device and the movable valve core device are connected in a detachable manner by being provided with a rear plug, which is beneficial to prolonging the service life of the pilot electromagnetic stop valve device. That is, if the main valve core device or the movable valve core device has a damaged part, the damaged part can be replaced by disassembling, so that the new part can be continuously matched with other undamaged parts for use, the service life of the pilot electromagnetic stop valve device is prolonged, and the maintenance cost of the device is reduced.

The size, structure, position and the like of the rear plug can be determined according to actual conditions and actual requirements in the actual application process.

Preferably, a cavity for accommodating the spring seat 15 and the pilot valve spool 5 may be provided at the top of the main spool means, and the pilot hole 8 may be provided at the center of the cavity.

Therefore, after the spring seat 15 and the pilot valve spool 5 are placed in the cavity, the pilot valve spool 5 can contact the pilot hole 8, so that the pilot valve spool 5 effectively blocks the pilot hole 8, thereby separating the upper cavity 18 and the lower cavity 19.

On the basis of the above-mentioned pilot-operated electromagnetic stop valve device, preferably, the pilot valve core 5 may be configured as a sealing member wrapped with a magnetic conductive material, so that the pilot valve core 5 can effectively block the pilot hole 8, and the pilot valve core 5 can move under the action of electromagnetic force.

The magnetic conductive material member may be a special stainless steel material member, a stainless iron material member, or a pure iron material member. Therefore, in the actual application process, the materials, the shapes, the sizes and the like of the magnetic conduction material piece and the sealing piece can be determined according to the actual situation and the actual requirement.

Preferably, a boss 17 for clamping and lifting the pilot valve spool 5 may be provided at the bottom of the spring seat 15, so that the pilot valve spool 5 can overcome a large pressure difference and be separated from the pilot hole 8.

This is because the attraction between the pilot valve spool 5 and the electromagnetic coil 3 is relatively weak, and the pilot valve spool 5 receives a large downward pressing force, so that the pilot valve spool 5 cannot move upward by only the electromagnetic force. Therefore, the boss 17 matched with the bottom size of the pilot valve core 5 can be arranged at the bottom of the spring seat 15, so that the boss 17 can be clamped and fixed with the pilot valve core 5 when contacting with the pilot valve core 5, the pilot valve core 5 is lifted by the boss 17 to be separated from the pilot hole 8, air in a cavity at the upper part and the lower part can be circulated, the pilot valve core 5 can not be subjected to large downward pressure any more, and can move upwards under the action of electromagnetic force, and the pilot valve core 5 can not stop moving until the pilot valve core 5 contacts with the bottom end face of the limiting column 14.

Preferably, in an initial state, the distance between the bottom end surface of the pilot valve core 5 and the top end surface of the boss 17 is smaller than the distance between the top end surface of the movable iron core 4 and the first limit end surface 11, so that the boss 17 can lift the pilot valve core 5 before the movable iron core 4 stops moving.

The initial state is a state in which the pilot type electromagnetic shutoff valve device is closed and not energized. Because the movable iron core 4 can synchronously move the spring seat 15 when moving, namely the lug boss 17 at the bottom of the spring seat 15 can also synchronously move, and the moving stroke of the lug boss 17 is the same as that of the movable iron core 4. The distance between the top end surface of the movable iron core 4 and the first limit end surface 11 also means the movement stroke of the movable iron core 4. The distance between the bottom end surface of the pilot valve core 5 and the top end surface of the boss 17 means that the boss 17 can contact with the pilot valve core 5 after moving by the distance, and then the pilot valve core 5 can be lifted, so that the pilot valve core 5 is separated from the pilot hole 8.

Therefore, the distance between the bottom end face of the pilot valve core 5 and the top end face of the boss 17 is smaller than the distance between the top end face of the movable iron core 4 and the first limit end face 11, so that the boss 17 arranged in the spring seat 15 can be contacted with the pilot valve core 5 and lift the pilot valve core 5 before the movable iron core 4 moves to the first limit end face 11, and the pilot valve core 5 can overcome a large pressure difference, is separated from the pilot hole 8 and moves upwards.

In the actual application process, the material, shape, structural size of the pilot valve element 5, the shape and size of the boss 17 and the like can be determined according to the actual situation and the actual requirement.

In order to facilitate understanding of the working principle of the pilot electromagnetic stop valve device provided by the present invention, the working principle will be explained below.

Preferably, the distance between the top end face of the movable iron core 4 and the first limit end face 11 in the valve cover 2 can be set to be 5.0mm, the distance between the top end face of the main valve element 7 and the second limit end face 12 in the valve cover 2 can be set to be 4.7mm, and then the distance between the bottom end face of the pilot valve element 5 and the top end face of the boss 17 arranged at the bottom of the spring seat 15 can be set to be 4.5mm, so that a stroke can be reserved for the up-and-down movement of internal parts of the pilot electromagnetic stop valve device, and the pilot valve element 5 can be effectively guaranteed to be lifted by the boss 17 before the movable iron core 4 moves to the first limit end face 11, and the pilot valve element 5 and the pilot hole 8 can be further guaranteed to be separated when the main valve element 7 moves to the second.

Of course, in the actual application process, according to the actual situation and the actual need, other choices may be made for the distance between the top end surface of the movable iron core 4 and the first limit end surface 11 in the valve cover 2, the distance between the top end surface of the main valve element 7 and the second limit end surface 12 in the valve cover 2, and the distance between the bottom end surface of the pilot valve element 5 and the top end surface of the boss 17 provided at the bottom of the spring seat 15. However, it is necessary to ensure that the three distances satisfy the above-described correspondence relationship so that the pilot type electromagnetic shutoff valve device operates smoothly.

Note that the initial state of the pilot type electromagnetic shutoff valve device is a closed state, as shown in fig. 2. At this time, the electromagnetic coil 3 is not electrified, the elastic device 6 is in a compression device, the elastic device 6 applies downward thrust to the limit column 14, so that the pilot valve core 5 tightly presses and blocks the pilot hole 8, and the upper cavity 18 and the lower cavity 19 can be isolated.

In the initial closed state, the fluid pressure at the gas inlet 9 is P1, the internal pressure thereof is atmospheric pressure P2 since the pilot hole 8 communicates with the lower chamber 19, the gas outlet 10, etc., and P1 is much greater than P2. Furthermore, part of the fluid at the inlet 9 will enter the upper cavity 18 along the mating clearance between the outer circumference of the main poppet 7 and the inner circumference of the bonnet 2, the pressure in the upper cavity 18 is slightly less than P1, and the partial fluid pressure in the upper cavity 18 at this time can be named < P1, and < P1 is also greater than P2.

It should be noted that P1 is far greater than P2, which means that the pressure of the fluid P1 at the inlet 9 is far greater than the pressure of the atmospheric pressure P2 at the outlet 10.

At this time, the overall stress state of main valve element 7 is: the upper end of the main valve core 7 is pushed downwards by the elastic device 6 in the movable valve core device and the spring 16 of the spring seat 15, and the downward pressure exerted by the upper cavity 18 is < P1. And the lower end of main valve element 7 only has upward pressure applied by lower cavity 19, and the pressure is P2, and through the above-mentioned force analysis, main valve element 7 is pressed downward, so that the bottom of main valve element 7 is contacted with the communication port, and the communication port can be effectively sealed, so that the effect of closing the valve is realized.

When the pilot electromagnetic cut-off valve device is used for working, namely after the electromagnetic coil 3 is electrified, the electromagnetic coil 3 can generate strong electromagnetic force instantly, and the movable iron core 4 can overcome the elastic force action of the elastic device 6 and the spring 16 and move upwards under the adsorption action of the electromagnetic force. Since the spring seat 15 and the plunger 4 are fixedly connected by the screw, the spring seat 15 also moves upward along with the plunger 4. In addition, during the upward movement of the movable iron core 4 and other components, the pilot valve core 5 and the main valve core 7 are still in a static state because the pilot valve core 5 and the main valve core 7 are still subjected to a great pressure difference between the upper cavity 18 and the lower cavity 19, and the downward < P1 pressure of the upper cavity 18 is greater than the upward P2 pressure of the lower cavity 19.

When the movable iron core 4, the limiting column 14, the spring seat 15 and other components move upwards by a stroke of 4.5mm, as shown in fig. 3, the top end surface of the boss 17 arranged inside the spring seat 15 just contacts with the bottom end surface of the pilot valve core 5, because a stroke difference of 0.5mm still exists between the top end surface of the movable iron core and the first limiting end surface 11 in the valve cover 2, at this time, the pilot valve core 5 and the main valve core 7 are still in a static state.

And when the movable iron core 4 continues to move upwards by 0.5mm under the adsorption effect of the electromagnetic force until the movable iron core contacts with the first limiting end face 11, meanwhile, the spring seat 15 also continues to move upwards by 0.5mm synchronously, and the boss 17 can be clamped and fixed with the pilot valve core 5 after contacting with the pilot valve core 5, so that in the moving process, the boss 17 can lift the pilot valve core 5 by 0.5mm, namely a gap of 0.5mm is formed between the bottom end face of the pilot valve core 5 and the top end face of the pilot hole 8. At this time, the upper cavity 18 and the lower cavity 19 are communicated, the high-pressure fluid in the upper cavity 18 will flow to the lower cavity 19 rapidly, because the fluid in the front air inlet 9 enters the upper cavity 18 through the matching gap between the main valve spool 7 and the valve cover 2, and the flow area of the matching gap is much smaller than that of the pilot hole 8, the fluid discharged from the upper cavity 18 through the pilot hole 8 is more than the fluid entering through the matching gap, so that the high pressure cannot be accumulated in the upper cavity 18, at this time, the pressure in the upper cavity 18 is P3, P3 is slightly larger than P2, but P3 is much smaller than P1. At this time, the upward magnetic force applied to the pilot valve element 5 is greater than the downward pressure, and the pilot valve element 5 can continue to move upward until the top end surface of the pilot valve element 5 contacts the bottom end surface of the limit column 14, and the pilot valve element 5 stops moving.

Since the limit post 14 moves upward 5.0mm along with the plunger 4, the pilot valve element 5 also needs to move upward 5.0mm to contact the limit post 14, as shown in fig. 4. At this time, the distance between the bottom end surface of the pilot valve element 5 and the top end surface of the pilot hole 8 is 5.0 mm.

When the pilot spool 5 is separated from the pilot bore 8, the upper chamber 18 is pressure lost and no pressure can build up, and the fluid pressure in the upper chamber 18 and the lower chamber 19 is substantially equal. However, pressure P1 at inlet 9 pushes main spool 7 upward. Furthermore, spring 16 on spring seat 15 is located on top of main spool 7, and spring 16 is now in a compressed state, which also applies an upward thrust to main spool 7. And main valve element 7 also receives upward electromagnetic force, and under the combined action of various upward thrusts, main valve element 7 moves upward, and at this time, the communication port is opened, that is, the solenoid valve is opened, so that the fluid at air inlet 9 can pass through the communication port and lower cavity 19, and finally flow out to air outlet 10. Because the distance between the top end surface of main valve element 7 and second limit end surface 12 in valve cover 2 is 4.7mm, main valve element 7 will contact with second limit end surface 12 in valve cover 2 to stop moving after moving upward 4.7 mm.

At this time, the pilot type electromagnetic cut-off valve device is in the fully open state. Since the operation stroke of the pilot valve element 5 is 5.0mm before, however, the movement stroke of the pilot hole 8 moving upwards along with the main valve element 7 in the process is 4.7mm, a gap of 0.3mm still exists between the bottom end surface of the pilot valve element 5 and the top end surface of the pilot hole 8, as shown in fig. 5, so that the conduction of the upper cavity 18 and the lower cavity 19 can be effectively ensured, and the phenomenon that the opening state of the main valve element 7 is influenced due to the pressure difference does not occur.

When the solenoid 3 is de-energized, the pilot-operated electromagnetic cut-off valve device will automatically close, as shown in fig. 6. When the electromagnetic coil 3 is powered off, the electromagnetic force applied to the movable iron core 4 disappears instantly, the compressed elastic device 6 is released, and the elastic device 6 pushes the limiting column 14 downwards to move, so that the limiting column 14 drives the pilot valve core 5 to move downwards until the bottom end face of the pilot valve core 5 contacts with the top end face of the pilot valve core 8, and the pilot valve core 5 seals the pilot valve core 8 again, thereby isolating the upper cavity 18 from the lower cavity 19. At this time, fluid will accumulate in the upper chamber 18 again, so that the pressure in the upper chamber 18 is < P1, and because the lower chamber 19 is communicated with the gas inlet 9, the pressure in the lower chamber 19 is slightly less than the pressure P1 at the gas inlet 9, i.e. the pressure between the upper chamber 18 and the lower chamber 19 is even.

At the same time, main valve element 7 and plunger 4 and the rest of the components will move downwards under the combined action of gravity and elastic means 6 until the bottom of main valve element 7 contacts the communication opening, as shown in fig. 7. At this time, the air inlet 9 and the lower cavity 19 are isolated again, the pressures in the lower cavity 19 and the pilot hole 8 are atmospheric pressure P2, the pressure in the upper cavity 18 is < P1, so that a pressure difference is established between the upper cavity 18 and the lower cavity 19 again, and finally the main valve element 7 is subjected to downward pressure, and the contact between the main valve element 7 and the communication port is tighter, so that the main valve element 7 can well seal the communication port, that is, the valve is tightly closed, and the pilot-operated electromagnetic stop valve device returns to the initial closed state.

Still need explain, the utility model provides a guide's formula electromagnetism stop valve device, its design is exquisite, through the motion of electromagnetic force in order to control guide valve core 5 to through the motion stroke of reserving the part in the device inside in advance, thereby form the pressure differential of upper and lower part cavity 19, with the motion of driving main valve core 7, finally realized opening and closing operation of valve, reach four two and dial very heavy effects. Moreover, the device simplifies the complex design of the traditional valve, and can highlight the ingenious point of the design of the device when the valve body 1 with large drift diameter is used.

In addition, it should be noted that the directions or positional relationships indicated by "top", "bottom", "upper", "lower", etc. in the present application are based on the directions or positional relationships shown in the drawings, and are only for the convenience of simplifying the description and facilitating the understanding, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed in a specific direction and operate, and thus, should not be construed as limiting the present invention.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The utility model provides an arbitrary compound mode of all embodiments all is in this utility model's a protection scope, does not do here and gives unnecessary details.

It is right above that the utility model provides a guide's formula electromagnetism stop valve device has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. A pilot-operated electromagnetic stop valve device is characterized by comprising a valve body (1), a valve cover (2) connected with the top of the valve body (1), a valve core device arranged in the valve body (1) and the valve cover (2), and an electromagnetic coil (3) used for generating electromagnetic force for adsorbing the valve core device, wherein the electromagnetic coil (3) is arranged at the upper part of the valve cover (2);

the valve core device comprises a movable valve core device arranged in the valve cover (2) and a movable main valve core device arranged in the valve body (1), the main valve core device is connected with the movable valve core device, the movable valve core device comprises a movable iron core (4), a pilot valve core (5) connected with the bottom of the movable iron core (4) and an elastic device (6) used for extruding the movable iron core (4) downwards, and the movable iron core (4) is connected with the elastic device (6);

the main valve element device comprises a main valve element (7) and a pilot hole (8) which is used for being in contact with the bottom of the pilot valve element (5), the lower part of the valve body (1) is provided with an air inlet (9), an air outlet (10) and a communication port, the communication port is used for communicating the air inlet (9) with the air outlet (10), and the bottom of the main valve element (7) is in contact with the communication port so as to control the communication port to be opened and closed;

the movable iron core (4) and the main valve core (7) are made of metal materials, and the moving stroke of the movable iron core (4) is larger than the running stroke of the main valve core (7), so that when the main valve core (7) is completely opened, the pilot valve core (5) is separated from the pilot hole (8).

2. The pilot-operated electromagnetic stop valve device according to claim 1, wherein a first limit end face (11) for limiting the movement stroke of the movable iron core (4) and a second limit end face (12) for limiting the movement stroke of the main valve core (7) are provided in the valve cover (2), and in an initial state, the distance between the top end face of the movable iron core (4) and the first limit end face (11) is greater than the distance between the top end face of the main valve core (7) and the second limit end face (12).

3. The pilot-operated electromagnetic stop valve device according to claim 2, wherein the movable valve element device includes a thimble (13) for contacting the first limit end surface (11) and a limit post (14) for limiting a movement distance of the pilot valve element (5), the thimble (13) passes through a top of the movable iron core (4), the limit post (14) is connected with the pilot valve element (5), one end of the elastic device (6) is connected with the thimble (13), and the other end of the elastic device is connected with the limit post (14), so that the thimble (13) forms an upper limit on the elastic device (6) to apply a downward elastic force to the limit post (14), and the elastic device (6) is in a compressed state in an initial state.

4. Piloted electromagnetic stop valve device according to claim 3, characterized in that the moving spool device is provided with a spring seat (15) for fixing the limit post (14) and the pilot spool (5), a spring (16) being wound on the spring seat (15), the spring (16) being in a compressed state in an initial state.

5. Piloted electromagnetic shut-off valve device as in claim 4, characterized by the fact that said spring seat (15) is removably connected to said plunger (4).

6. Pilot electromagnetic shut-off valve device according to claim 5, characterised in that the bottom of the spring seat (15) is provided with a boss (17) for snap-in lifting of the pilot spool (5) to separate the pilot spool (5) from the pilot bore (8) against a pressure difference.

7. The pilot-operated electromagnetic stop valve device according to claim 6, characterized in that in an initial state, the distance between the bottom end surface of the pilot valve spool (5) and the top end surface of the boss (17) is smaller than the distance between the top end surface of the movable iron core (4) and the first limit end surface (11), so that the boss (17) can lift the pilot valve spool (5) before the movable iron core (4) stops moving.

8. The pilot-operated electromagnetic stop valve device according to any one of claims 4 to 7, wherein a back plug is nested on an outer wall of the movable spool device, the back plug is detachably connected with the main spool device, and the back plug is in clearance fit with the movable spool device so that the movable spool device can move relative to the main spool device.

9. Pilot-operated electromagnetic stop valve device according to claim 8, characterized in that the top of the main spool device is provided with a cavity for accommodating the spring seat (15) and the pilot spool (5), the pilot hole (8) being provided at the center of the cavity so that the pilot spool (5) can block the pilot hole (8).

10. Piloted electromagnetic shut-off valve device as in any of claims 1 to 7, characterized in that said piloting spool (5) is a seal externally wrapped with a piece of magnetically conductive material, so that said piloting spool (5) can seal said piloting hole (8) and be moved by said electromagnetic force.

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