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CN-224229331-U - Mute electromagnetic valve with non-return function

CN224229331UCN 224229331 UCN224229331 UCN 224229331UCN-224229331-U

Abstract

The utility model provides a mute electromagnetic valve with a non-return function, which comprises a framework body, a movable iron core body and a static iron core body, wherein an air inlet pressure is reduced through an air flow channel by arranging a non-return valve assembly, so that electromagnetic force required by the movable iron core body is reduced, the service life of the electromagnetic valve is prolonged, meanwhile, the pressure in the inner part of a first cavity is always higher than that of a second cavity, impact energy is reduced when the movable iron core body returns to inhibit return noise, an elastic element provides smaller buffer force when the movable iron core body moves, and the elastic element is matched with the fact that magnetic attraction required by the static iron core body and the movable iron core body in a suction sealing way is reduced, impact energy is reduced when the static iron core body and the movable iron core body in a sealing way are in a sealing collision way, suction noise is inhibited, an external non-return valve is omitted, the structure is simplified, and the elastic element drives the movable iron core body to block an air outlet flow channel at the same time, and the non-return valve assembly is pushed to seal the first air inlet, so that a bi-directional effect on an air path is achieved.

Inventors

  • Hu Qiujie
  • Dong Shifa
  • DU XIAOXIA

Assignees

  • 苏州申博电子科技有限公司

Dates

Publication Date
20260512
Application Date
20250522

Claims (10)

  1. 1. The mute electromagnetic valve with the non-return function comprises a skeleton body (10), a movable iron core body (20) and a mute iron core body (30), wherein a first cavity (40) is arranged in the skeleton body (10), the movable iron core body (20) is arranged in the first cavity (40) in an axially movable way, the mute iron core body (30) is fixed at the far end of the first cavity (40), the mute iron core body (30) and the movable iron core body (20) are mutually attracted after the electromagnetic valve is electrified, the mute electromagnetic valve is characterized in that a second cavity (50) is arranged in the mute iron core body (30), a non-return valve assembly (60) is arranged in the second cavity (50) in an axially movable way, the non-return valve assembly (60) comprises an elastic element (601), a push rod assembly (602) and a sealing element (603), one end of the elastic element (601) is connected with the movable iron core body (20), the other end of the elastic element (601) is sleeved with the push rod assembly (602), the far end of the push rod assembly (602) is connected with the push rod assembly and provided with the sealing element, the second cavity (50) is provided with a third cavity (70), the third cavity (70) is communicated with the fourth cavity (70), the far end of the fourth cavity (90) is provided with an air bag air inlet (110), the periphery of the push rod assembly (602) is provided with an air flow channel (120) for communicating the third cavity (70) with the second cavity (50), and the sealing element (603) is used for blocking and sealing the first air inlet (80).
  2. 2. The mute electromagnetic valve with the non-return function according to claim 1, wherein a yoke bracket (130) is arranged at the top end of the framework body (10), a coil (140) is wound on the framework body (10), the yoke bracket (130) is arranged above the coil (140), and the framework body (10) is detachably connected with the yoke bracket (130).
  3. 3. The mute electromagnetic valve with the non-return function according to claim 1, wherein the push rod assembly (602) comprises a push rod body (6021), a plurality of radial protrusions (150) are circumferentially arranged on the outer side of the push rod body (6021), the radial protrusions (150) are symmetrically arranged along a central axis, a supporting platform (160) extending outwards is arranged at the bottom of each radial protrusion (150), and after the elastic element (601) is sleeved with the radial protrusions (150), one end of the elastic element (601) abuts against the top surface of the supporting platform (160), so that the stroke of the elastic element (601) is limited.
  4. 4. A mute electromagnetic valve with non-return function according to claim 3, characterized in that said air flow passage (120) is formed between two adjacent radial projections (150), when the air flow enters said third cavity (70) from said first air inlet (80), the air flow is uniformly dispersed through said air flow passage (120) into said second cavity (50).
  5. 5. The mute electromagnetic valve with a non-return function according to claim 1, wherein the second cavity (50) and the third cavity (70) are both stepped cavities, a side surface of the second cavity (50) is a braking surface (170), a surface of the supporting platform (160) close to the braking surface (170) is an inclined surface (180), when the air bag is inflated, air flows into the third cavity (70) through the first air inlet (80), and when the air flows into the air bag, the air flows are greater than the sum of the pre-pressure, the compression force of the elastic element (601) and the gravity of the push rod body (6021) so that the push rod body (6021) moves towards the movable iron core body (20), and when the braking surface (170) is abutted against the inclined surface (180), the push rod body (6021) stops moving, and at this time, the air flows from the air flow channel (120) into the second cavity (50) and then sequentially passes through the first cavity (40) and the fourth cavity (90) to inflate the air bag (110).
  6. 6. The mute electromagnetic valve with the non-return function according to claim 5, wherein the connection mode of the push rod body (6021) and the sealing element (603) is one of bonding or clamping, and when the installation mode is clamping, the push rod body (6021) is provided with a first installation groove (190), and the first installation groove (190) is clamped with the sealing element (603).
  7. 7. The mute electromagnetic valve with a non-return function according to claim 5, characterized in that the diameter of the radial protrusion (150) on the outer circumference of the push rod body (6021) is smaller than the diameter of the connection of the push rod body (6021) and the sealing element (603), the diameter of the connection of the sealing element (603) is smaller than the maximum diameter of the second cavity (50), and when the braking surface (170) abuts against the inclined surface (180), a gap for the air flow to pass is left.
  8. 8. The silent electromagnetic valve with a non-return function according to claim 1, wherein a first groove (200) is formed in the outer side of the static iron core body (30), a first sealing ring (210) matched with the first groove (200) is arranged, the first groove (200) is clamped with the first sealing ring (210), the outer side of the first sealing ring (210) is abutted with the first cavity (40), and the first sealing ring (210) is used for assisting sealing and preventing air flow from leaking.
  9. 9. The mute electromagnetic valve with the non-return function according to claim 1, wherein the two ends of the movable iron core body (20) are connected with first sealing elements (220), and the first sealing elements (220) are used for blocking inflow or outflow of air flow and simultaneously assist in reducing noise generated by collision.
  10. 10. The mute electromagnetic valve with non-return function according to claim 1, characterized in that the sealing element (603) and the first seal (220) are both elastic materials.

Description

Mute electromagnetic valve with non-return function Technical Field The utility model belongs to the technical field of solenoid valve fluid control, and particularly relates to a mute solenoid valve with a non-return function. Background At present, new energy development is rapid, driving and riding cabins are quite quiet, and in order to reduce internal noise and improve comfortableness, part of automobile seats are provided with pneumatic comfortable systems, the pneumatic waist support systems realize the support of the waist support and the adjustment of the comfort level of the waist support through the inflation and deflation of the air bags, and the electromagnetic air valves must simultaneously meet the functions of inflation, pressure maintaining and deflation. With the rapid development of the automobile industry and the expansion of market demands, especially, new energy is taken as a representative vehicle type, the automobile is increasingly popular, and the requirements on the structure of corresponding parts are also higher in noise and space design. At present, pneumatic waist support in the industry mainly uses electromagnetic valves in a controller to control inflation and deflation switches of a system, and the structural size and the height of the valve can influence the arrangement and placement of the control system in a seat and the noise generated by collision between a static iron core and a movable iron core in the movement of the valve. The electromagnetic valve is a device based on electromagnetic induction phenomenon principle, mainly used for controlling the flow of fluid (such as gas or liquid), and is composed of an electromagnet and a valve body, wherein the electromagnet part comprises a coil, a valve core and the valve body. When the power is off, the electromagnetic force disappears, the valve core is reset under the action of the spring force, the valve is closed, and the air inlet is closed to stabilize the flowing gas of the main air passage. The electromagnetic valve plays an important role in an automatic control system, CAN automatically control according to signals such as a sensor, a controller and CAN/LIN communication, realizes functions such as automatic switching and flow rate control of fluid, and improves production efficiency and equipment stability. The utility model discloses a mute electromagnetic valve, which comprises a framework provided with a cavity, wherein the outer peripheral wall of the framework is provided with a coil, a movable iron core and a static iron core are coaxially arranged in the cavity, one end of the static iron core, which faces the movable iron core, is sleeved with a mute pad, the mute pad, which faces the movable iron core, is provided with a convex ring, when the movable iron core is attracted with the static iron core, the convex ring is in butt joint with the end face of the movable iron core, and the convex ring is in butt joint with the end face of the movable iron core, so that the impact contact area of the movable iron core and the static iron core during the attraction is reduced, and the impact noise generated by the attraction of the movable iron core and the static iron core can be effectively reduced. Although in the prior art, be equipped with the guiding hole towards the one end of moving the iron core at quiet iron core, installation elastomeric element in the guiding hole also only plays the impact that moves the iron core and reduce and quiet iron core when inhaling, noise abatement to and provide the effect of moving iron core restoring power and sealed air flue, nevertheless, still there are following problems in the prior art: 1. The two-way action on the air path is not involved, the air inlet and the air outlet can be plugged and sealed at the same time, and the pressure maintaining effect is achieved; 2. The compression spring force in the electromagnetic valve in the prior art is limited by the process of winding the spring steel wire and the spring, the tolerance range is often larger, the consistency of the products of the electromagnetic valve is not high, the factors affecting the electromagnetic valve are the wire diameter and the outer diameter, the 4 th power of the wire diameter is in direct proportion to the elastic force, and the 3 rd power of the outer diameter is in inverse proportion to the elastic force; 3. In order to achieve the purpose of stably closing the air inlet passage under the working condition that the air supply pressure of an external air source is greater than 45kPa, the electromagnetic valve generally needs higher voltage (such as 10v or more) to generate enough electromagnetic force to overcome the compression force of the spring and the pressure of the external air pressure, so that a large amount of heat is generated, the energy consumption is increased, and the service life of the electromagnetic valve is greatly prolonged. If only a starting voltage capable of closi