CN221004006U - Electromagnetic valve - Google Patents

Abstract

The utility model relates to a solenoid valve, which comprises: a valve body with an inlet and an outlet, a valve cover connected above the valve body, and a through hole which is penetrated up and down in the valve cover; a piston assembly movably disposed up and down in the through hole of the valve cover; characterized by further comprising: the driving mechanism arranged above the valve cover comprises a movable iron core, a fixed iron core and a coil surrounding the movable iron core and the fixed iron core, wherein the movable iron core can be arranged between the fixed iron core and the piston assembly in a vertically movable mode, and the movable iron core is connected with the piston assembly through a first elastic piece. Compared with the prior art, the utility model has the advantages that: the power consumption that the coil provided only needs to satisfy movable iron core and remove for fixed iron core can, has reduced the required electromagnetic force of valve opening, has reduced the power consumption of coil and has also reduced the volume of coil simultaneously, has energy-conserving, light and handy advantage.

Description

Electromagnetic valve

Technical Field

The present utility model relates to a solenoid valve.

Background

The electromagnetic valve is an element for controlling the fluid circulation state in a pipeline, and is widely applied to automatic production detection lines in the industries of chemical industry, pharmacy, food and the like. For example, for a steam electromagnetic valve, because high-flux transportation of a low-pressure steam pipeline is needed in some industrial production processes, the traditional steam electromagnetic valve which opens a valve by means of pressure difference is difficult to achieve high sensitivity and stable operation under low pressure difference, and the problems of piston blockage, insensitive switching reaction and the like often occur.

Aiming at the problem, the Chinese patent utility model 'combined steam electromagnetic valve' with the patent number of CN91221039.7 (publication number of CN 2103696U) discloses a combined steam electromagnetic valve which can be used for zero pressure difference transportation, and consists of a main valve, a pressure taking valve and a pressure relief valve, wherein a main valve piston is of a slender I-shaped structure and adopts a pin shaft rotary annular plane sealing structure, the upper surface and the lower surface of the main valve cover are respectively provided with a small guide cylinder and a large guide cylinder, and the small guide cylinder is matched with the periphery of the upper end of a piston rod and the periphery of the outer side Zhou Huahuan of the piston to limit a valve core; the piston design of the valve core reduces the weight of the valve core, reduces the impact force of the valve core, improves the anti-blocking performance of the valve core and shortens the switching time; the stability of the repeated motion of the valve core piston is enhanced by the large guide cylinder and the small guide cylinder, and the good sealing performance of the valve core is ensured by the pin shaft rotary annular plane sealing structure, so that the electromagnetic valve can be horizontally installed, has small gravity influence and can work under zero pressure difference. However, in this application, the piston rod and the piston are integrally arranged, and when the valve is opened under the zero pressure difference condition, the piston rod and the piston are required to be integrally far away from the valve port by means of electromagnetic force, so that the electromagnetic force required for opening the valve is larger, the power consumption of the coil is larger, the volume of the coil is larger, the current thermal effect is enhanced, and the coil is easily burnt out at a higher temperature during high-power working to become a potential safety hazard.

Disclosure of utility model

The technical problem to be solved by the utility model is to provide a solenoid valve with lower power consumption aiming at the prior art.

The technical scheme adopted for solving the technical problems is as follows: the electromagnetic valve comprises:

the valve body is provided with an inlet and an outlet, and a first valve port communicated with the inlet and a second valve port communicated with the outlet are also arranged on the side wall of the valve body;

The valve cover covers the first valve port and the second valve port and is connected above the valve body, and a through hole which penetrates up and down is formed in the valve cover;

The piston assembly is arranged in the through hole of the valve cover in a vertically movable manner;

it is characterized in that the method also comprises the following steps:

The driving mechanism is arranged above the valve cover and comprises a movable iron core, a fixed iron core and a coil surrounding the movable iron core and the fixed iron core, wherein the movable iron core can be arranged between the fixed iron core and the piston assembly in a vertically movable mode, and the movable iron core is connected with the piston assembly through a first elastic piece.

In order to realize the normal operation of the driving mechanism in the electromagnetic valve, preferably, from the aspect of simple structure, the upper part of the valve cover is connected with a magnetism isolating pipe communicated with the through hole of the valve cover, and the magnetism isolating pipe extends into the coil and is enclosed outside the movable iron core and the fixed iron core, so that the movable iron core is prevented from radial movement, and the reliability of the vertical movement of the movable iron core is ensured. Therefore, the movable iron core can not stop moving towards the fixed iron core due to the circumferential magnetic field of the movable iron core after the coil is electrified.

In order to ensure normal opening of the electromagnetic valve, preferably, a first connecting portion is formed at the lower end of the movable iron core, correspondingly, a second connecting portion is formed at the upper end of the piston assembly, and the first elastic member is connected between the first connecting portion and the second connecting portion so that the first connecting portion and the second connecting portion have a tendency to approach each other. The implementation mode ensures that the first elastic piece is firmly connected with the piston assembly and the movable iron core and is not easy to separate.

In order to achieve stable operation of the solenoid valve, it is preferable that the piston assembly includes a piston body at a lower portion; the periphery on piston subassembly upper portion is equipped with first direction subassembly, the periphery on piston subassembly lower part is equipped with the second direction subassembly. According to the technical scheme, the position of the piston assembly is not easy to deviate after the piston assembly is switched in the electromagnetic valve, so that the stable operation of the electromagnetic valve is ensured, and the situation that the piston assembly is blocked in the up-and-down movement process is avoided.

In order to further stabilize the switching movement of the piston assembly, preferably, the first guide assembly includes a guide block embedded in the inner wall of the through hole of the valve cover, and a guide sleeve disposed between the piston assembly and the guide block and connected to the piston body.

The piston comprises a piston body, and is characterized in that an embedded groove is formed in the outer wall of the piston body along the circumferential direction, a second guide assembly is embedded in the embedded groove of the piston body, and the second guide assembly comprises an elastic ring arranged on the inner side of the embedded groove of the piston body, and a sealing guide ring arranged on the outer side of the elastic ring and in contact with the inner wall of a through hole of the piston assembly. According to the technical scheme, the upper part of the piston assembly and the piston body can move up and down along the contact surface of the guide block and the guide sleeve and the contact surface of the sealing guide ring and the inner wall of the valve cover through hole, meanwhile, the radial sizes of the guide sleeve and the sealing guide ring limit the radial movement of the piston assembly, so that the piston assembly stably moves vertically in the electromagnetic valve, and the elastic ring also ensures that the piston body cannot be blocked in the valve cover through hole.

In order to realize the sensitivity of the electromagnetic valve, the longitudinal section of the piston body is preferably in an elongated I shape.

In order to realize that the inside of the movable iron core is not influenced by transported fluid, preferably, a pilot valve hole penetrating up and down is arranged in the piston assembly, and an iron core sealing piece covering the pilot valve hole is embedded in the lower end of the movable iron core. According to the technical scheme, the through hole of the valve cover is separated from the movable iron core, so that when the electromagnetic valve is opened, fluid medium cannot be sucked back into the movable iron core.

In order to prolong the service life of the movable iron core, preferably, the upper end of the iron core sealing member is connected and embedded at the lower end of the movable iron core through a second elastic member, so that the iron core sealing member has a downward pressing trend, and the lower edge of the movable iron core extends inwards along the circumferential direction and is provided with a limiting edge for limiting the position of the iron core sealing member. According to the technical scheme, the second elastic piece shares the impact force of the piston assembly on the iron core sealing piece when the electromagnetic valve is opened.

In order to realize that the electromagnetic valve can be quickly closed when the electromagnetic valve is powered off or horizontally placed, preferably, a third elastic piece is arranged between the movable iron core and the fixed iron core, and the technical scheme ensures that the movable iron core can automatically recover to the original position under the action of no magnetic field so as to drive the piston component to block the valve port.

In order to ensure the normal operation of the movable iron core and the fixed iron core, preferably, a mounting hole is vertically formed in the movable iron core, and the third elastic piece is restrained in the mounting hole and the upper end of the third elastic piece is connected with the fixed iron core. According to the technical scheme, the third elastic piece is firmly connected with the movable iron core, and is not easy to separate.

Compared with the prior art, the utility model has the advantages that: this solenoid valve has set up first elastic component between moving iron core and piston assembly, and the during operation, the consumption that the coil provided only need satisfy moving iron core for fixed iron core removal can, and piston assembly can upwards move based on the pulling effect of first elastic component. Thus, the electromagnetic force required by opening the valve is reduced, and the power consumption of the coil is reduced. Meanwhile, based on the reduction of the power consumption requirement of the coil, the design volume of the coil can be reduced, and the weight of the valve core of the electromagnetic valve is correspondingly reduced. The electromagnetic valve has the advantages of energy conservation and light weight.

Drawings

FIG. 1 is an exploded view of a structure according to an embodiment of the present utility model;

FIG. 2 is a longitudinal cross-sectional view (the direction of the arrow is the direction of fluid movement) of an embodiment of the present utility model;

FIG. 3 is a longitudinal cross-sectional view of a piston assembly and plunger assembly in accordance with an embodiment of the present utility model;

FIG. 4 is a longitudinal sectional view of an embodiment of the present utility model in a closed state of the solenoid valve;

fig. 5 is a longitudinal sectional view of an embodiment of the present utility model in an opened state of the solenoid valve.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 5, is a preferred embodiment of the present utility model. The electromagnetic valve of the embodiment is mainly used for controlling the on-off state of fluid transportation, and when the control environment is low pressure difference or zero pressure difference and high flux gas transportation is needed, the electromagnetic valve has to provide the functions of low power consumption and high stability for users. For example, when the solenoid valve is operated from the closed state to the open state, the user often desires a small force to push the piston thereof to move, and the piston moves smoothly when the opening and closing movement is repeated, and similarly, the solenoid valve can be safely used for transportation of low-pressure gas such as fuel gas, oxygen, inert gas, etc. for a long time, and the low power consumption thereof can ensure that the coil is not easily burned out when the solenoid valve is operated, so that it would be advantageous to provide a solenoid valve with low power consumption, and the structure of which the solenoid valve is developed will be explained below:

Referring to fig. 1-2, the electromagnetic valve comprises a valve body 1 with an inlet and an outlet, wherein a first valve port communicated with the inlet and a second valve port communicated with the outlet are also arranged on the side wall of the valve body 1; a valve cover 2 connected to the upper part of the valve body 1 so as to cover the first valve port and the second valve port, wherein the valve cover 2 is internally provided with a through hole penetrating up and down; a piston assembly 3 movably disposed up and down in the through hole of the valve cover 2; and the driving mechanism 4 is arranged above the valve cover 2 and comprises a movable iron core 41, a fixed iron core 42 and a coil 43 surrounding the movable iron core 41 and the fixed iron core 42, wherein the movable iron core 41 can be arranged between the fixed iron core 42 and the piston assembly 3 in a vertically movable way, and the movable iron core 41 is connected with the piston assembly 3 through a first elastic piece 44. Wherein, the valve cover 2 is internally provided with a pilot hole which is the same as the inlet and is used for opening the electromagnetic valve under the high pressure difference environment; sealing elements are arranged at the joint of the valve cover 2 and the valve body 1, between the piston assembly 3 and the inner wall of the through hole of the valve cover 2, and between the bottom of the piston assembly 3 and the contact surfaces of the first valve port and the second valve port; the coil 43 and the stator core 42 are fixed by bolts.

In order to realize the normal operation of the driving mechanism 4 in the electromagnetic valve, that is, the driving mechanism 4 can normally control the up-and-down motion of the piston assembly 3, the magnetism isolating pipe 5 communicated with the through hole is connected above the valve cover 2 in the embodiment, the magnetism isolating pipe 5 extends into the coil 43 and is enclosed outside the movable iron core 41 and the fixed iron core 42, thereby avoiding the radial movement of the movable iron core 41 and ensuring the up-and-down movement reliability of the movable iron core 41. Thereby, the movable iron core 41 does not stop moving towards the fixed iron core 42 due to the circumferential magnetic field after the coil 43 is electrified. Wherein a sealing element is arranged between the valve cover 2 and the magnetic isolation tube group 5.

In order to ensure normal opening of the solenoid valve, the lower end of the movable iron core 41 of the present embodiment is formed with a first connecting portion 411, and correspondingly, the upper end of the piston assembly 3 is formed with a second connecting portion 31, and the first elastic member 44 is connected between the first connecting portion 411 and the second connecting portion 31 so that the two have a tendency to approach each other. This implementation manner makes the connection relationship between the first elastic member 44 and the piston assembly 3 and the movable iron core 41 firm, and is not easy to separate.

In order to achieve stable operation of the solenoid valve, the piston assembly 3 of the present embodiment includes a piston body 32 at a lower portion; the upper periphery of the piston assembly 3 is provided with a first guide assembly 33 and the lower periphery of the piston assembly 3 is provided with a second guide assembly 34. According to the technical scheme, the position of the piston assembly 3 is not easy to deviate after the piston assembly is switched in the electromagnetic valve, so that the stable operation of the electromagnetic valve is ensured, and the situation that the piston assembly is blocked in the up-and-down movement process is avoided.

In order to further stabilize the switching motion of the piston assembly 3, the first guide assembly 33 of the present embodiment includes a guide block 331 embedded in the inner wall of the through hole of the valve cover 2, and a guide sleeve 332 disposed between the piston assembly 3 and the guide block 331 and connected to the piston body 32; the outer wall of the piston body 32 is provided with a caulking groove along the circumferential direction, the second guide assembly 34 is embedded in the caulking groove of the piston body 32, and the second guide assembly 34 comprises an elastic ring 341 arranged on the inner side of the caulking groove of the piston body 32 and a sealing guide ring 342 arranged on the outer side of the elastic ring 341 and contacted with the inner wall of the through hole of the piston assembly 3. This technical scheme makes the upper portion of piston assembly 3 and piston body 32 can reciprocate along the contact surface of guide block 331 and uide bushing 332 and the contact surface of sealing guide ring 342 and valve gap 2 through-hole inner wall, and the radial dimension of uide bushing 332 and sealing guide ring 342 has restricted the radial motion of piston assembly 3 simultaneously for piston assembly 3 takes place stable vertical motion in the solenoid valve, and elastic ring 341 has also guaranteed that piston body 32 can not block in valve gap 2 through-hole.

In order to achieve the solenoid valve switching sensitivity, please refer to fig. 3, the longitudinal section of the piston body 32 of this embodiment is in an elongated "i" shape. The technical scheme further reduces the weight of the piston body 32, so that the electromagnetic force for driving the piston assembly 3 to start to move is reduced, and the electromagnetic valve response is more sensitive.

In order to realize that the inside of the movable iron core is not influenced by transported fluid, a pilot valve hole 35 penetrating up and down is arranged in the piston assembly 3 of the embodiment, and an iron core sealing piece 45 covering the pilot valve hole 35 is embedded in the lower end of the movable iron core 41. This solution separates the through hole of the valve cap 2 from the plunger 41 so that the fluid medium is not sucked back into the plunger 41 when the solenoid valve is opened.

In order to prolong the service life of the movable iron core 41, the upper end of the iron core sealing member 45 of the present embodiment is connected and embedded to the lower end of the movable iron core 41 by the second elastic member 46, so that the iron core sealing member 45 has a downward pressing trend, and the lower edge of the movable iron core 41 extends inward along the circumferential direction to form a limit edge for limiting the position of the iron core sealing member 45. In the technical scheme, the second elastic piece 46 shares the impact force of the piston assembly 3 on the iron core sealing piece 45 when the electromagnetic valve is opened, so that the iron core sealing piece 45 is prevented from loosening.

Finally, in order to realize that the electromagnetic valve can be quickly closed when the electromagnetic valve is powered off or placed horizontally, a third elastic piece 47 is arranged between the movable iron core 41 and the fixed iron core 42 in the embodiment, and the technical scheme ensures that the movable iron core 41 can automatically recover to the original position under the action of no magnetic field so as to drive the piston assembly 3 to block the valve port. In order to ensure the normal operation of the movable iron core 41 and the fixed iron core 42, an installation hole is vertically arranged in the movable iron core 41 of the embodiment, and a third elastic piece 47 is restrained in the installation hole and the upper end of the third elastic piece is connected with the fixed iron core 42. This solution makes the connection between the third elastic member 47 and the movable core 41 firm and not easy to disengage.

In summary, the solenoid valve can realize the following actions under different pressure difference conditions:

a. Opening the electromagnetic valve under the environment of high pressure difference between the inside and the outside:

After the coil 43 is electrified, magnetic force is generated, the movable iron core 41 moves upwards to be attracted with the fixed iron core 42 under the action of the magnetic force, the pilot valve hole 35 is opened, the pressure of the through hole of the valve cover 2 where the piston body 32 is positioned is reduced through the pilot valve hole 35, the pressure of the through hole of the valve cover 2 is reduced, the piston assembly 3 is jacked up by the fluid pressure, and the electromagnetic valve is opened.

B. closing the electromagnetic valve under the environment of high pressure difference between the inside and the outside:

After the coil 43 is powered off, the magnetic field disappears, the movable iron core 41 moves downwards to the iron core sealing member 45 by the elastic force of the third elastic member 47 and the gravity of the movable iron core to seal the valve guide port 35, at the moment, the pressure of the through hole of the valve cover 2 is increased to be more than or equal to the inlet pressure of the valve body 1 through the pilot hole, in this state, the piston assembly 3 is pushed by fluid to move downwards, the piston body 32 seals the valve port, and the electromagnetic valve is closed.

C. opening the electromagnetic valve in the environment of low pressure difference or zero pressure difference inside and outside the electromagnetic valve:

After the coil 43 is electrified, magnetic force is generated, the movable iron core 41 moves upwards to be attracted with the fixed iron core 42 under the action of the magnetic force, the first elastic piece 44 deforms to pull the piston assembly 3 to move upwards, and the electromagnetic valve is opened. In this process, the power consumption provided by the coil 43 only needs to be satisfied by the movement of the movable iron core 41 relative to the fixed iron core 42, and the piston assembly 3 can be moved upward based on the pulling action of the first elastic member 44, reducing the electromagnetic force required for opening the valve and thus reducing the power consumption.

D. closing the electromagnetic valve in the environment of low pressure difference or zero pressure difference inside and outside the electromagnetic valve:

After the coil 43 is powered off, the magnetic field disappears, the movable iron core 41 moves downwards to the iron core sealing member 45 to seal the valve guide port 35 by the elastic force of the third elastic member 47 and the gravity of the movable iron core, at the moment, the first elastic member 44 deforms to push the piston assembly 3 to move downwards to the piston body 32 to seal the valve port, and the electromagnetic valve is closed.

The first elastic member 44 is arranged between the movable iron core 41 and the piston assembly 3, and in operation, the power consumption provided by the coil 43 only needs to meet the requirement that the movable iron core 41 moves relative to the fixed iron core 42, and the piston assembly 3 can move upwards based on the pulling action of the first elastic member 44. The piston assembly 3 improves the stability of the movement of the piston assembly 3 by matching the first guide assembly 33 and the second guide assembly 34 at the periphery thereof, thereby reducing the longitudinal size requirement of the piston body 32, reducing the volume of the piston body 32, and more meeting the requirement that the first elastic piece 44 can realize the pulling action on the piston assembly 3 by small elastic force, and correspondingly being beneficial to realizing the driving requirement of the piston assembly 3 by small power consumption. Thus, the electromagnetic force required by opening the valve is reduced, and the power consumption of the coil is reduced. Meanwhile, based on the reduction of the power consumption requirement of the coil, the design volume of the coil can be reduced, and the weight of the valve core of the electromagnetic valve is correspondingly reduced. The electromagnetic valve has the advantages of energy conservation and light weight.

In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the utility model may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Claims (10)

1. An electromagnetic valve comprises

The valve body (1) is provided with an inlet and an outlet, and a first valve port communicated with the inlet and a second valve port communicated with the outlet are also arranged on the side wall of the valve body;

A valve cover (2) covering the first valve port and the second valve port and connected above the valve body (1), wherein a through hole penetrating up and down is arranged in the valve cover (2);

the piston assembly (3) is arranged in the through hole of the valve cover (2) in a vertically movable manner;

it is characterized in that the method also comprises the following steps:

The driving mechanism (4) is arranged above the valve cover (2), and comprises a movable iron core (41), a fixed iron core (42) and a coil (43) arranged around the movable iron core (41) and the fixed iron core (42), wherein the movable iron core (41) can be arranged between the fixed iron core (42) and the piston assembly (3) in a vertically movable mode, and the movable iron core (41) is connected with the piston assembly (3) through a first elastic piece (44).

2. The solenoid valve according to claim 1, wherein: the upper part of the valve cover (2) is connected with a magnetism isolating pipe (5) communicated with the through hole, and the magnetism isolating pipe (5) extends into the coil (43) and is arranged outside the movable iron core (41) and the fixed iron core (42) in a surrounding mode.

3. The solenoid valve according to claim 1, wherein: the lower end of the movable iron core (41) is provided with a first connecting part (411), correspondingly, the upper end of the piston assembly (3) is provided with a second connecting part (31), and the first elastic piece (44) is connected between the first connecting part (411) and the second connecting part (31) so that the first connecting part and the second connecting part have a trend of approaching each other.

4. A solenoid valve according to any one of claims 1 to 3 wherein: the piston assembly (3) comprises a piston body (32) positioned at the lower part;

The periphery of the upper part of the piston assembly (3) is provided with a first guide assembly (33), and the periphery of the lower part of the piston assembly (3) is provided with a second guide assembly (34).

5. The solenoid valve according to claim 4, wherein: the first guide assembly (33) comprises a guide block (331) embedded in the inner wall of the through hole of the valve cover (2), and a guide sleeve (332) arranged between the piston assembly (3) and the guide block (331) and connected with the piston body (32);

The piston comprises a piston body (32), and is characterized in that an caulking groove is formed in the outer wall of the piston body (32) along the circumferential direction, a second guide assembly (34) is embedded in the caulking groove of the piston body (32), and the second guide assembly (34) comprises an elastic ring (341) arranged on the inner side of the caulking groove of the piston body (32), and a sealing guide ring (342) arranged on the outer side of the elastic ring (341) and in contact with the inner wall of a through hole of the piston assembly (3).

6. The solenoid valve according to claim 5, wherein: the longitudinal section of the piston body (32) is in an elongated I shape.

7. A solenoid valve according to any one of claims 1 to 3 wherein: the piston assembly (3) is internally provided with a pilot valve hole (35) penetrating up and down, and an iron core sealing piece (45) covering the pilot valve hole (35) is embedded in the lower end of the movable iron core (41).

8. The solenoid valve according to claim 7, wherein: the upper end of the iron core sealing piece (45) is connected and embedded at the lower end of the movable iron core (41) through a second elastic piece (46), so that the iron core sealing piece (45) has a downward pressing trend, and the lower edge of the movable iron core (41) extends inwards along the circumferential direction to form a limiting edge for limiting the position of the iron core sealing piece (45).

9. A solenoid valve according to any one of claims 1 to 3 wherein: a third elastic piece (47) is arranged between the movable iron core (41) and the fixed iron core (42).

10. The solenoid valve according to claim 9, wherein: the movable iron core (41) is internally provided with a mounting hole along the vertical direction, and the third elastic piece (47) is restrained in the mounting hole and the upper end of the third elastic piece is connected with the fixed iron core (42).