CN217977648U

CN217977648U - Normally closed miniature electromagnetic valve

Info

Publication number: CN217977648U
Application number: CN202222274067.7U
Authority: CN
Inventors: 彭亮; 缪艳玲; 朱群馨; 张爱明
Original assignee: Sichuan Awa Seimitsu Electric Co ltd
Current assignee: Sichuan Awa Seimitsu Electric Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-06
Anticipated expiration: 2032-08-29

Abstract

The utility model relates to a little solenoid valve technical field discloses a miniature solenoid valve of normal close formula, including the apron, with the apron lock forms the shell of accommodation space, be located the coil in the accommodation space, with the coil relative spacing and the suspension baffle in the accommodation space, one end is connected the shell, the other end is connected the baffle and is suspended the baffle in the spring in the accommodation space, gomphosis is fixed and is protruded in the plug on baffle surface; the cover plate is provided with an air inlet hole right above the rubber plug, and the shell is provided with an air outlet hole on the side wall. The beneficial effects are as follows: the normally closed micro electromagnetic valve has a compact structure and a small volume, and a rubber plug on a spring support clapboard blocks an air inlet in a power-off state; the partition board is controlled to descend through the coil electrification, so that the rubber plug on the partition board is far away from the air inlet hole, the air flow flows in from the air inlet hole and flows out through the air outlet hole in the shell, and the effect of opening the electromagnetic valve is achieved.

Description

Normally closed miniature electromagnetic valve

Technical Field

The utility model relates to a little solenoid valve technical field, in particular to miniature solenoid valve of normal close formula.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling air flow, and belongs to an actuator.

The miniature electromagnetic valve is a flow control valve product which is smaller and lighter than a common electromagnetic valve product, is applied to various daily equipment such as analytical instruments, medical instruments and cleaning, and is small, exquisite, portable and widely applied to various industries due to the characteristic.

The existing miniature electromagnetic valve has the advantages of complex structure, large occupied space, simple structure and reasonable design, and is the design direction of the existing miniature electromagnetic valve.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that miniature solenoid valve structure is complicated among the prior art, occupation space is big, the utility model discloses a miniature solenoid valve of normal close formula. The specific technical scheme is as follows:

a normally closed type micro electromagnetic valve comprises a cover plate, a shell, a coil, a partition plate, a spring and a rubber plug, wherein the shell is buckled with the cover plate to form an accommodating space, the coil is positioned in the accommodating space, the partition plate is opposite to the coil at a certain interval and is suspended in the accommodating space, one end of the spring is connected with the shell, the other end of the spring is connected with the partition plate and is suspended in the accommodating space, and the rubber plug is fixedly embedded and protrudes out of the surface of the partition plate; the cover plate is provided with an air inlet hole right above the rubber plug, and the side wall of the shell is provided with a through air outlet hole; the rubber plug can move downwards along with the clapboard to open the air inlet hole.

Further, the rubber plug is of a T-shaped cylinder structure and comprises a top and a bottom which are both cylindrical; the bottom is embedded in the partition plate, the top is abutted to the cover plate and blocks the air inlet, and the area of the top is larger than that of the air inlet.

Furthermore, the air inlet hole penetrates through the middle part of the cover plate; the edge position of the inner surface of the cover plate is convexly provided with an annular convex strip, the inner side of the annular convex strip is connected with a fillet, and the outer side of the annular convex strip is connected with a convex block.

Furthermore, the shell comprises a plastic shell, an iron core and a terminal which are integrally formed by injection molding; the shell comprises a bottom wall and a side wall formed by extending upwards from the edge of the bottom wall.

Furthermore, air outlet holes penetrating through the side wall are symmetrically formed in two sides of the side wall; the free end of the side wall is recessed downwards to form a notch corresponding to the lug.

Furthermore, the terminals are located at four corners of the bottom wall, a wire leading-out hole penetrating through the bottom plate is formed in one side of the bottom wall, the two terminals close to one side of the wire leading-out hole are used for connecting an external power supply and fixing the electromagnetic valve, and the two terminals far away from one side of the wire leading-out hole are used for fixing the electromagnetic valve.

Further, the iron core comprises a pole core and a magnetic yoke which are integrally arranged; the magnetic yoke comprises an end plate positioned at the bottom and a side plate bent and extended in the same direction from the edge of the end plate; the pole core is arranged in the center of the end plate and on the same side as the side plate, and a groove is formed in the free end face of the pole core.

Further, the pole piece, the yoke, and the side wall are concentrically disposed.

Further, the spring is disposed between the side wall and the yoke.

Further, the baffle is circular centrosymmetric platelike structure, the center is provided with a mounting groove for clamping the rubber plug, and the left side and the right side of the baffle are provided with openings.

The beneficial effects of the utility model are that: the normally closed type miniature electromagnetic valve is compact in structure and small in size, and an air inlet is blocked by a rubber plug on a spring support partition plate in a power-off state; the baffle is controlled to descend by electrifying the coil, so that the rubber plug on the baffle is far away from the air inlet, the air flow flows in from the air inlet and flows out from the air outlet on the shell, and the opening effect of the electromagnetic valve is achieved.

Drawings

Fig. 1 is an exploded view of the structure of the present invention.

Fig. 2 is a schematic structural diagram of the back of the cover plate of the present invention.

Fig. 3 is a schematic structural diagram of the front side of the cover plate of the present invention.

Fig. 4 is a schematic structural diagram of the housing of the present invention.

Fig. 5 is a schematic structural diagram of the housing of the present invention.

Fig. 6 is a schematic structural diagram of the iron core of the present invention.

Fig. 7 is a schematic structural view of the separator of the present invention.

Fig. 8 is a schematic structural view of the rubber plug of the present invention.

Fig. 9 is a cross-sectional view of the present invention.

Wherein:

1-a cover plate; 11-an air intake; 12-a bump; 13-annular convex strips;

2-a housing; 21-a housing; 211-bottom wall; 212 — a side wall; 213-air outlet; 214-a notch;

215-lead-out hole; 216-terminal;

22-iron core; 221-pole piece; 222-a magnetic yoke; 223-a groove;

3, a coil;

4, a partition board; 41-mounting groove; 42-opening;

5-a spring;

6, a rubber plug; 61-bottom; 62 — top.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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.

A normally closed type miniature electromagnetic valve is shown in figure 1 and comprises a cover plate 1, a shell 2 buckled with the cover plate 1 to form an accommodating space, a coil 3 positioned in the accommodating space, a partition plate 4 arranged in the accommodating space at an interval relative to the coil 3, a spring 5 with one end connected with the other end of the shell 2 and the other end connected with the partition plate 4 and suspending the partition plate 4 in the accommodating space, and a rubber plug 6 fixed in an embedded mode and protruding out of the surface of the partition plate 4.

The cover plate 1 has a structure as shown in fig. 2 and 3, the upper surface of the cover plate 1 is a smooth plane, and the middle part of the cover plate 1 is provided with an air inlet 11 penetrating through the cover plate 1. The marginal position of the lower surface of apron 1 bulges downwards and has annular sand grip 13, and annular sand grip 13 is used for fixing a position with shell 2, and the external connection of annular sand grip 13 has lug 12, and lug 12 is used for being connected with shell 2 block, and the internal connection of annular sand grip 13 has the fillet (not marking) that is used for butt baffle 4.

The housing 2 is constructed as shown in fig. 4, and includes a housing 21 and a core 22 which are integrally injection-molded. The housing 21 is made of plastic material, and the iron core 22 is made of magnetic conductive metal material.

The housing 21 is formed as shown in fig. 5, and the housing 21 is a cylindrical structure and includes a bottom wall 211 and a side wall 212 extending upward from an edge of the bottom wall 211. The left and right sides of the sidewall 212 are symmetrically provided with air outlets 213. The upper surface of the sidewall 212 is recessed downward to form a notch 214 corresponding to the protrusion 12 for engaging and connecting the cover plate 1 and the housing 2, and at this time, the annular protrusion 13 of the cover plate 1 abuts against the inner wall surface of the sidewall 212 of the housing 2 to achieve positioning. One end of the bottom wall 211 is provided with a wire drawing hole 215 penetrating through the bottom wall 211. Terminals 216 are provided at four corners of the bottom wall 211. Two terminals 216 near a side of the wire drawing hole 215 are used for externally connecting and fixing the solenoid valve, and two terminals far from the side of the wire drawing hole 215 are used only for fixing the solenoid valve. The bottom wall 211, the side wall 212 and the cover plate 1 are engaged to form a receiving space.

The structure of the iron core 22 is as shown in fig. 6, the iron core 22 is a cylindrical structure, and includes a pole piece 221 and a magnetic yoke 222 which are formed by machining in an integrated machine, the magnetic yoke 222 includes an end plate (not marked) at the bottom and a side plate (not marked) which is vertically bent and extended from the end plate to one side, the pole piece 221 is located in the magnetic yoke 222, one end of the pole piece 221 is connected to the end plate, and the other end of the pole piece 221 is outwardly extended in the same side direction of the side plate. The pole piece 221 and the yoke 222 are members for guiding magnetic lines of force in the electromagnet, and preferably, a magnetic conductive material such as pure iron is used. The coil 3 is wound around the outer periphery of the pole piece 221 and located between the pole piece 221 and the yoke 222, and when the coil 3 is energized to generate a magnetic force in the iron core 22, the yoke 222 attracts the separator 4 downward. The height of coil 3 is less than the height of yoke 222 curb plate, and pole piece 221 and yoke 222 are located same height, can descend the in-process butt baffle 4 simultaneously and can not strike coil 21 at baffle 4, ensure the reliability of solenoid valve power supply. The free end surface of the pole piece 221 facing the partition 4 is provided with a groove (not labeled) for abdicating the mounting groove 41. The spring 5 is arranged between the side plate of the magnetic yoke 222 and the side wall 212 of the shell 21, the free height of the spring 5 is higher than that of the side plate of the magnetic yoke 222, so that the separation plate 4 can block the air inlet hole 11 by the supporting rubber plug 6 under the action of the elastic supporting force of the spring 5 under the initial state that the coil 3 is not electrified, and the electromagnetic valve is kept in a normally closed state. The first through hole 213 and the second through hole 223 are concentrically arranged to ensure that the pole piece 221, the yoke 222, and the case 21 are concentrically arranged, thereby ensuring the stability of the up-and-down movement of the partition plate 4.

As shown in fig. 7, the separator 4 has a circular, center-symmetric plate-like structure, specifically, a cold-rolled steel plate. The center is provided with a mounting groove 41 for clamping the rubber plug 6 in a protruding way towards the direction of the machine core 221, and the left side and the right side are provided with U-shaped openings 42. A spring 5 disposed in the housing 2 supports a lower surface of the partition plate 4.

The rubber plug 6 is shown in fig. 8 and has a T-shaped cylinder structure, which includes a top 62 and a bottom 61 both in the shape of a cylinder. The bottom 61 is installed in the mounting groove 41, the top 62 protrudes out of the mounting groove 41, the cross-sectional area of the top 62 is larger than that of the air inlet hole 11, the height of the top 62 is larger than that of the fillet, and the rubber plug 6 always keeps the electromagnetic valve in a normally closed state under the action of the elastic supporting force of the spring 5 in the initial power-off state.

As shown in fig. 9, in the power-off state, the partition plate 4 abuts against the insertion strip of the cover plate 1 under the elastic supporting force of the spring 5, and the rubber plug 6 protruding from the surface of the partition plate 4 can tightly block the air inlet hole 11, so as to keep the solenoid valve in a normally closed state. When the coil 3 is energized, the iron core 22 generates magnetic force, the magnetic yoke 222 will attract the partition plate 4 to descend, and drive the rubber plug 6 to move downward, the rubber plug 6 is far away from the air inlet hole 11, and the air flows in from the air inlet hole 11, flows through the valve body, and flows out from the air outlet hole 213 of the housing 2.

The utility model discloses the product can use on intelligent bracelet for the cooperation is measured the blood pressure rhythm of the heart.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "horizontal", "vertical" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A normally closed type miniature electromagnetic valve is characterized by comprising a cover plate, a shell, a coil, a partition plate, a spring and a rubber plug, wherein the shell is buckled with the cover plate to form an accommodating space, the coil is positioned in the accommodating space, the partition plate is opposite to the coil at a certain interval and is suspended in the accommodating space, one end of the spring is connected with the shell, the other end of the spring is connected with the partition plate, and the partition plate is suspended in the accommodating space; the cover plate is provided with an air inlet hole right above the rubber plug, and the side wall of the shell is provided with a through air outlet hole; the rubber plug can move downwards along with the clapboard to open the air inlet hole.

2. The normally closed type micro electromagnetic valve according to claim 1, wherein the rubber plug is of a T-shaped cylinder structure, and comprises a top part and a bottom part which are both cylindrical; the bottom is embedded in the partition plate, the top is abutted to the cover plate and blocks the air inlet, and the area of the top is larger than that of the air inlet.

3. The normally closed micro solenoid valve according to claim 1, wherein the air inlet hole penetrates through the middle of the cover plate; the edge position of the inner surface of the cover plate is convexly provided with an annular convex strip, the inner side of the annular convex strip is connected with a fillet, and the outer side of the annular convex strip is connected with a convex block.

4. The normally closed micro solenoid valve as claimed in claim 3, wherein the housing comprises a plastic housing, an iron core and a terminal, which are integrally injection molded; the shell comprises a bottom wall and a side wall formed by extending upwards from the edge of the bottom wall.

5. The normally closed type micro electromagnetic valve according to claim 4, wherein air outlet holes penetrating the side wall are symmetrically formed on both sides of the side wall; the free end of the side wall is recessed downwards to form a notch corresponding to the lug.

6. The normally closed type micro electromagnetic valve according to claim 4, wherein the terminals are located at four corners of the bottom wall, one side of the bottom wall is provided with a lead wire leading-out hole penetrating through the bottom plate, two terminals close to one side of the lead wire leading-out hole are used for externally connecting an electric power and fixing the electromagnetic valve, and two terminals far away from one side of the lead wire leading-out hole are used for fixing the electromagnetic valve.

7. The normally closed micro solenoid valve according to claim 4, wherein the iron core comprises a pole core and a yoke integrally provided; the magnetic yoke comprises an end plate positioned at the bottom and a side plate bent and extended in the same direction from the edge of the end plate; the pole core is arranged in the center of the end plate and at the same side as the side plate, and a groove is formed in the free end face of the pole core.

8. The normally closed micro solenoid valve according to claim 7, wherein the pole piece, the yoke, and the side wall are concentrically arranged.

9. The normally closed micro solenoid valve of claim 8, wherein said spring is disposed between said side wall and said yoke.

10. The normally closed type micro electromagnetic valve according to claim 1, wherein the partition plate is a circular centrosymmetric plate structure, the center is provided with an installation groove for clamping the rubber plug, and the left side and the right side of the partition plate are provided with openings.