CN210600386U

CN210600386U - Bistable electromagnetic valve head

Info

Publication number: CN210600386U
Application number: CN201921641537.0U
Authority: CN
Inventors: 应俊
Original assignee: Ningbo Geagle Intelligent Sanitary Tech Co ltd
Current assignee: Ningbo Zhanying Intelligent Kitchen and Bathroom Technology Co.,Ltd.
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-05-22
Anticipated expiration: 2029-09-29

Abstract

The utility model discloses a bistable electromagnetic valve head, including the disk seat that is equipped with the valve port in, be fixed with the valve head mounting panel on the disk seat, be fixed with the coil subassembly on the valve head mounting panel, the coil subassembly includes coil skeleton, coiling in coil skeleton coil on and wrap up in the coil shell of outside, the upper portion is provided with the fixed iron core in the hole of coil skeleton, the upper end and the coil shell of fixed iron core offset, the lower part is provided with movable iron core in the hole of coil skeleton, movable iron core's lower extreme is fixed with the end cap that matches with the valve port, be provided with the spring between movable iron core and the fixed iron core; the periphery of the movable iron core in the valve seat is embedded with a permanent magnet, and a floating gap is reserved between the permanent magnet and the valve seat. The utility model has the advantages that: the structure is simple and compact, the consistency of batch manufacturing is excellent, and the expandability of the optimal matching point of the magnetic field is strong.

Description

Bistable electromagnetic valve head

Technical Field

The utility model belongs to the technical field of the solenoid valve manufacturing technology and specifically relates to indicate a bistable state solenoid valve head.

Background

The bistable electromagnetic valve head used in the market at present arranges the permanent magnet in the coil skeleton, so that the thickness dimension of the permanent magnet must participate in the design of an axial dimension chain, the design and manufacturing precision of the valve head is reduced, and the consistency of the performance of the valve head is not favorable for batch manufacturing.

In addition, the diameter size of the permanent magnet is limited by the size of an inner hole of the coil framework, and the limitation may cause that the optimal matching point cannot be found in the magnetic field of the permanent magnet and the magnetic field of the coil, so that the valve head cannot work at the optimal working point, and even the design scheme fails. Therefore, the structure of the existing bistable electromagnetic valve head needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem that to prior art's current situation, provide simple structure, compactness, it is good to make the uniformity in batches, a bistable state solenoid valve head that magnetic field best match point scalability is strong.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a bistable electromagnetic valve head comprises a valve seat with a valve port, a valve head mounting plate is fixed on the valve seat, a coil assembly is fixed on the valve head mounting plate and comprises a coil framework, a coil wound on the coil framework and a coil shell wrapped outside, a fixed iron core is arranged at the middle upper part of an inner hole of the coil framework, the upper end of the fixed iron core abuts against the coil shell, a movable iron core is arranged at the middle lower part of the inner hole of the coil framework, a plug matched with the valve port is fixed at the lower end of the movable iron core, and a spring is arranged between the movable iron core and the fixed iron core; the periphery of the movable iron core in the valve seat is embedded with a permanent magnet, and a floating gap is reserved between the permanent magnet and the valve seat.

The optimized technical measures further comprise:

the coil framework extends downwards to the valve seat to form an extension section, and the permanent magnet is sleeved on the periphery of the extension section.

And a sealing ring is arranged between the valve seat and the extension section.

The lower end of the movable iron core is provided with an assembling raised head, and the plug is provided with an assembling groove matched with the assembling raised head.

The periphery of the valve head mounting plate is bent upwards to form a flange.

The utility model discloses a bistable state solenoid valve head, simple structure, compactness, it has following advantage:

(1) the permanent magnet is in a floating design in the axial positioning mode, the axial dimensional tolerance of the permanent magnet does not need to participate in the calculation of an assembly dimension chain of the whole valve head, the link of the assembly dimension chain is reduced, the precision of the dimension chain can be greatly improved, and the consistency of batch manufacturing is good.

(2) Permanent magnet size and magnetic field are strong and weak closely related, the utility model discloses in its size radially not restricted by coil skeleton, adopt the design of floating in the axial, left sufficient space for the size change of permanent magnet, if the operating current size of valve head needs to be changed, can conveniently change the permanent magnet size fast to match the coil magnetic field that produces under the new operating current, thereby effectively guarantee that the valve head still can be in coil magnetic field and the best matching point work in permanent magnet magnetic field.

(3) The utility model discloses a permanent magnet diameter size be greater than the diameter of deciding the iron core or moving the iron core, the permanent magnet can provide stronger magnetic field force to reliable work provides the solution under harsh operating modes such as high temperature, big stroke for the valve head.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of the magnetic field distribution maintained in a steady state according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 2, the structure of the present invention is schematically illustrated,

wherein the reference numerals are: the valve comprises a valve seat 1, a valve port 1a, a sealing ring 11, a valve head mounting plate 2, a flange 21, a coil framework 3, an extension section 31, a coil 4, a coil shell 5, a fixed iron core 6, a movable iron core 7, an assembling raised head 7a, a plug 71, a spring 8, a permanent magnet 9 and a floating gap 9 a.

As shown in figures 1 to 2 of the drawings,

a bistable electromagnetic valve head comprises a valve seat 1 with a valve port 1a arranged therein, a valve head mounting plate 2 is fixed on the valve seat 1, a coil assembly is fixed on the valve head mounting plate 2, the coil assembly comprises a coil framework 3, a coil 4 wound on the coil framework 3 and a coil shell 5 wrapped outside, a fixed iron core 6 is arranged at the middle upper part of an inner hole of the coil framework 3, the upper end of the fixed iron core 6 abuts against the coil shell 5, a movable iron core 7 is arranged at the middle lower part of the inner hole of the coil framework 3, a plug 71 matched with the valve port 1a is fixed at the lower end of the movable iron core 7, and a spring 8 is arranged between the movable iron core 7 and the fixed iron core 6; a permanent magnet 9 is embedded in the valve seat 1 at the periphery of the movable iron core 7, and a floating gap 9a is reserved between the permanent magnet 9 and the valve seat 1.

In the embodiment, the coil bobbin 3 extends downwards to the valve seat 1 to form an extension section 31, and the permanent magnet 9 is sleeved on the periphery of the extension section 31. The extension 31 provides radial positioning for the permanent magnet 9.

In the embodiment, a sealing ring 11 is arranged between the valve seat 1 and the extension 31.

In the embodiment, the lower end of the movable iron core 7 is provided with an assembling protrusion 7a, and the plug 71 is provided with an assembling groove matched with the assembling protrusion 7 a.

In the embodiment, the valve head mounting plate 2 is bent upward to form a rib 21.

The bistable electromagnetic valve head of the utility model has simple and compact structure, the upper end of the fixed iron core 6 is propped against the coil shell 5, and the coil shell 5 ensures the axial positioning of the fixed iron core 6; the permanent magnet 9 is sleeved on the extension section 31 at the lower part of the coil framework 3, the radial positioning of the permanent magnet 9 is guaranteed, the permanent magnet 9 adopts a floating design in the axial direction, a floating gap 9a is reserved between the permanent magnet 9 and the valve seat 1, the axial dimensional tolerance of the permanent magnet does not need to participate in the calculation of an assembly dimension chain of the whole valve head, the link of the assembly dimension chain is reduced, the precision of the dimension chain can be greatly improved, and the consistency of batch manufacturing is guaranteed to be good.

In addition, the permanent magnet 9 is axially magnetized, the permanent magnet 9 is arranged in the valve seat 1 (between the valve seat 1 and the valve head mounting plate 2) and on the periphery of the movable iron core 7, the radial size of the permanent magnet 9 is not constrained by the coil framework 3, enough space is reserved for size change of the permanent magnet 9, and expandability of the optimal matching point of the magnetic field is greatly improved. The utility model discloses in, the diameter of permanent magnet 9 is greater than the diameter of moving iron core 7, and the diameter is big more, and the magnetic field force that can provide is stronger more, can provide the solution for the valve head can be reliable work under harsh operating modes such as high temperature, big stroke.

The working principle is as follows:

when the electromagnetic valve is opened and closed, the current directions at both ends of the coil 4 are opposite. When the forward pulse current is on, the reverse pulse current is off, and conversely, when the reverse pulse current is on, the forward pulse current is off.

In this embodiment, when the coil 4 is supplied with positive pulse current at its two ends, the magnetic field between the movable iron core 7 and the fixed iron core 6 is cancelled, and the movable iron core 7 moves downward under the action of the spring 8 until the plug 71 abuts against the valve port 1a of the valve seat 1, so as to cut off the medium passage and maintain the seal; when reverse pulse current is conducted to the two ends of the coil 4, the magnetic field between the movable iron core 7 and the fixed iron core 6 is strengthened, the movable iron core 7 overcomes the spring force to move upwards to the end face of the fixed iron core 6 under the action of the magnetic force of the coil and the magnetic force of the permanent magnet, and the magnetic force is kept under the magnetic force of the permanent magnet 9.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a bistable state solenoid valve head, is equipped with disk seat (1) of valve port (1a) including being equipped with, disk seat (1) on be fixed with valve head mounting panel (2), characterized by: a coil assembly is fixed on the valve head mounting plate (2), the coil assembly comprises a coil framework (3), a coil (4) wound on the coil framework (3) and a coil shell (5) wrapped outside, a fixed iron core (6) is arranged at the middle upper part of an inner hole of the coil framework (3), the upper end of the fixed iron core (6) is abutted against the coil shell (5), a movable iron core (7) is arranged at the middle lower part of the inner hole of the coil framework (3), a plug (71) matched with the valve port (1a) is fixed at the lower end of the movable iron core (7), and a spring (8) is arranged between the movable iron core (7) and the fixed iron core (6); the permanent magnet (9) is embedded in the periphery of the movable iron core (7) in the valve seat (1), and a floating gap (9a) is reserved between the permanent magnet (9) and the valve seat (1).

2. A bistable electromagnetic valve head according to claim 1, wherein: coil skeleton (3) downwardly extending to form extension section (31) in disk seat (1), permanent magnet (9) cover locate extension section (31) periphery.

3. A bistable electromagnetic valve head according to claim 2, wherein: a sealing ring (11) is arranged between the valve seat (1) and the extension section (31).

4. A bistable electromagnetic valve head according to claim 3, wherein: an assembling raised head (7a) is arranged at the lower end of the movable iron core (7), and an assembling groove matched with the assembling raised head (7a) is formed in the plug (71).

5. A bistable electromagnetic valve head according to claim 4, wherein: the periphery of the valve head mounting plate (2) is bent upwards to form a flange (21).