Two-way normally-closed electromagnetic valve

Abstract

The utility model discloses a two-way normally-closed electromagnetic valve which comprises a shell, an iron core and a valve seat. An inner shell is arranged in the outer shell, and a coil is arranged in the inner shell; the iron core is arranged on the inner side of the shell and located on the inner side of the coil, one side of the shell is connected with a sleeve, and one side of the iron core extends into the sleeve; the coil is arranged in the inner shell, the inner shell is installed in the outer shell, and the iron core, the sleeve, the valve element, the valve seat and other components are reasonably arranged, so that the whole electromagnetic valve is compact in structure, occupied space of the components is reduced through the compact structure, the electromagnetic valve can be conveniently installed in equipment with limited space such as a vehicle and a power unit, the space utilization rate of the equipment is increased, and cost is reduced. The overall reliability is enhanced; the valve is a vehicle two-position two-way plug-in mounting type electromagnetic valve specially researched and developed for vehicles and power units, a high-efficiency electromagnetic structure and a high-efficiency hydraulic structure are adopted, and therefore the valve has the advantages of being small in oil passing resistance, small in internal leakage amount, high in reliability and the like.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, specifically a two-normally closed solenoid valve. Background Technology

[0002] Two normally closed solenoid valves are suitable for actuators that use steam as the heat medium for automatic temperature control. They are automotive two-position two-way cartridge solenoid valves specifically developed for vehicles and power units.

[0003] In existing technologies, traditional solenoid valves often lack a compact and reasonable layout design. In some older designs, the coil is directly exposed without the protection and organization of an inner shell. This not only occupies a large amount of installation space, making it difficult to find a suitable installation location in space-constrained equipment such as vehicles and power units, but also increases the length and complexity of the wiring between components. Numerous connection points are prone to loosening and poor contact due to vibrations during vehicle operation and long-term temperature changes, frequently causing connection failures. This severely reduces the overall reliability and stability of the solenoid valve and greatly affects the normal operation of the equipment. In view of this, we have introduced a two-stage normally closed solenoid valve. Utility Model Content

[0004] The purpose of this invention is to provide a two normally closed solenoid valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a two-normally closed solenoid valve, comprising: a housing, an iron core, and a valve seat;

[0006] The outer shell is provided with an inner shell, and the inner shell is provided with a coil.

[0007] The iron core is disposed inside the outer shell and located inside the coil. A sleeve is connected to one side of the outer shell, and one side of the iron core extends into the inside of the sleeve.

[0008] The valve seat is disposed on one side of the sleeve, and a valve core is disposed inside between the valve seat and the sleeve, with the valve core located on one side of the iron core.

[0009] Preferably, a nameplate is attached to one side of the outer casing. The nameplate is made of metal or plastic and is securely installed on the outer casing by riveting or gluing. The nameplate clearly indicates the model, specifications (such as rated voltage, current, diameter, pressure range, etc.), manufacturer, production date, and other important information of the solenoid valve, so that users can quickly and accurately obtain relevant information about the solenoid valve during selection, installation, maintenance, and repair.

[0010] Preferably, the surface of the housing is connected to a lead wire. The lead wire is made of insulated wire, which has good conductivity and insulation properties. One end of the lead wire is reliably electrically connected to the coil, and the other end is used to connect to an external power supply or control system to provide the solenoid valve with the electrical energy required for operation and to transmit control signals. The lead wire's exit position on the housing is reasonably designed to avoid being pulled or worn by external forces during installation and use. At the same time, necessary protective measures are taken, such as adding protective sleeves or wire channels, to ensure the safety and stability of the lead wire.

[0011] Preferably, a rear cover is connected to the other side of the outer casing.

[0012] Preferably, one end of the lead is electrically connected to the coil.

[0013] Preferably, the outer surface of the lead is made of an insulating material.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) By placing the coil inside the inner shell, which is then installed in the outer shell, and by rationally arranging components such as the iron core, sleeve, valve core, and valve seat, the entire solenoid valve structure is compact. This compact structure reduces the space occupied by components, making it easier to install in equipment with limited space, such as vehicles and power units, thereby improving the space utilization of the equipment. At the same time, it reduces the risk of connection failures that may be caused by the dispersion of components and enhances the overall reliability.

[0016] (2) Through the precise matching of valve core and valve seat and the optimization of flow channel, the obstruction of medium flow in the valve is reduced, so that fluid can pass through the solenoid valve smoothly. In the hydraulic system of vehicle or power unit, the smaller oil flow resistance helps to improve the system response speed and efficiency, reduce energy loss, and ensure stable system operation. For example, in fuel injection system, fuel can reach the injection position more quickly and accurately. The high-precision valve core and valve seat processing technology and good sealing design effectively reduce the leakage of internal liquid or gas. In some application scenarios with high sealing requirements, such as braking system or hydraulic control system, the system pressure can be kept stable, avoiding problems such as pressure drop, brake failure or reduced control accuracy caused by leakage, thus improving the safety and reliability of the system.

[0017] (3) This valve is a two-position two-way cartridge solenoid valve for vehicles and power units. It adopts a high-efficiency electromagnetic structure and hydraulic structure, which makes the valve have the characteristics of low oil flow resistance, low internal leakage and high reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the electromagnet electrical connection structure of this utility model.

[0021] In the diagram: 1. Iron core; 2. Outer shell; 3. Lead wire; 4. Sleeve; 5. Valve core; 6. Valve seat; 7. Back cover; 8. Coil; 9. Inner shell; 10. Nameplate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 This utility model provides a technical solution: a two-way normally closed solenoid valve, comprising: a housing 2, an inner housing 9 disposed inside the housing 2, and a coil 8 disposed inside the inner housing 9;

[0024] The iron core 1 is located inside the coil 8 and inside the outer casing 2. The coil 8 is usually made of soft magnetic material. This material has high magnetic permeability and can be quickly magnetized under the action of a magnetic field, which enhances the effect of electromagnetic force. The shape of the iron core 1 is carefully designed. One end of it extends into the inside of the sleeve 4 and interacts with the valve core 5. Under the drive of electromagnetic force, it can accurately control the movement of the valve core 5 and realize the opening and closing function of the valve. The surface of the iron core 1 is specially treated, such as grinding or coating, to reduce friction and wear between it and other parts and improve the service life of the solenoid valve.

[0025] The iron core 1 is located inside the outer shell 2 and inside the coil 8. The coil 8 is a key component for generating electromagnetic force in the solenoid valve. It is made of enameled wire and the winding process of the coil 8 is exquisite, which ensures the uniformity and tightness of the winding, thereby improving the electromagnetic conversion efficiency and reducing energy loss. Its insulation performance is good, and it can withstand a certain voltage without short circuit or leakage, thus ensuring the safe operation of the solenoid valve.

[0026] A sleeve 4 is connected to one side of the outer shell 2, and one side of the iron core 1 extends into the interior of the sleeve 4.

[0027] The sleeve 4 is generally made of metal or high-strength engineering plastic, which has good mechanical strength and wear resistance. The sleeve 4 provides a guiding function for the movement of the iron core 1, ensuring that the iron core 1 can accurately push the valve core 5 along the predetermined trajectory under the action of electromagnetic force. At the same time, it also plays a certain role in protecting the internal valve core 5 and valve seat 6, preventing external impurities from entering and affecting the normal operation of the valve.

[0028] Valve seat 6, the valve seat 6 is disposed on one side of sleeve 4, and valve core 5 is disposed inside between valve seat 6 and sleeve 4, the valve core 5 being located on one side of iron core 1;

[0029] The valve seat 6 is located on one side of the sleeve 4 and fits tightly with the sleeve 4. Its sealing surface is treated with grinding or welding wear-resistant materials, which has extremely high flatness and smoothness. It can form a good sealing fit with the valve core 5 and effectively prevent media leakage. The structural design of the valve seat 6 takes into account the principles of fluid mechanics. The flow channel shape has been optimized to reduce fluid resistance and ensure smooth flow of the medium in the valve.

[0030] The valve core 5 is usually made of stainless steel or special alloy, which has good corrosion resistance and wear resistance. The shape and size of the valve core 5 match the sealing surface of the valve seat 6, so that it can accurately achieve the sealing or opening action with the valve seat 6 under different working conditions. The valve core 5 may also be designed with special structures such as balance holes or guide structures to balance the pressure difference on both sides of the valve core 5 and improve the valve's operation flexibility and reliability.

[0031] A nameplate 10 is attached to one side of the surface of the housing 2. The nameplate 10 is made of metal or plastic and is firmly installed on the housing 2 by riveting or gluing. The nameplate 10 clearly marks important information such as the model and specifications of the solenoid valve (such as rated voltage, current, diameter, pressure range, etc.), manufacturer, and production date, so as to facilitate users to quickly and accurately obtain relevant information about the solenoid valve during the selection, installation, maintenance and repair process.

[0032] The surface of the outer casing 2 is connected to a lead wire 3. The lead wire 3 is made of insulated wire and has good conductivity and insulation properties. One end of the lead wire 3 is reliably electrically connected to the coil 8, and the other end is used to connect to an external power supply or control system to provide the solenoid valve with the electrical energy required for operation and to transmit control signals. The lead wire 3 is reasonably designed at its exit position on the outer casing 2 to avoid being pulled or worn by external forces during installation and use. At the same time, necessary protective measures are taken, such as adding a protective sleeve or wire groove, to ensure the safety and stability of the lead wire 3.

[0033] The other side of the outer casing 2 is connected to the rear cover 7.

[0034] One end of the lead 3 is electrically connected to the coil 8.

[0035] The outer surface of the lead 3 is made of insulating material.

[0036] Specifically, in use, when the electromagnet is not energized, the coil 8 does not generate a magnetic field. At this time, the iron core 1 is in the initial position. With the cooperation of its own structure and the valve seat 6, the valve core 5 closes the A to B channel, preventing the medium from flowing from A to B. Meanwhile, the B to A channel opens as a one-way valve, allowing the medium to flow from B to A. This utilizes the special structural design of the valve core 5 and the valve seat 6. When there is no electromagnetic force, the valve core 5 is subjected to spring force or its own gravity, etc., to maintain the seal of the A to B channel, while allowing one-way flow from B to A, meeting specific fluid control requirements. For example, it can prevent backflow in some systems.

[0037] When the electromagnet is energized, current flows into coil 8 through lead 3. Coil 8 generates a magnetic field, which causes iron core 1 to move under the action of electromagnetic force. The movement of iron core 1 pushes valve core 5 to change position, thereby opening bidirectionally from B to A and from A to B. At this time, valve core 5 overcomes the original force that restricts its movement and adjusts its relative position with valve seat 6 under the drive of iron core 1, opening the bidirectional channel and realizing the free flow of fluid in both directions. This meets the requirements of the system for bidirectional fluid control under different working conditions, enabling the solenoid valve to flexibly switch working states and adapt to complex fluid transportation or control processes.

[0038] This valve is a two-position two-way cartridge solenoid valve specifically developed for vehicles and power units. It adopts a high-efficiency electromagnetic and hydraulic structure, which makes the valve have the characteristics of low oil flow resistance, low internal leakage and high reliability.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual normally closed solenoid valve, characterized in that, include: The outer shell (2) has an inner shell (9) inside it, and a coil (8) is provided inside the inner shell (9). Iron core (1), the iron core (1) is disposed inside the outer shell (2) and located inside the coil (8), a sleeve (4) is connected to one side of the outer shell (2), and one side of the iron core (1) extends into the inside of the sleeve (4); Valve seat (6), the valve seat (6) is disposed on one side of the sleeve (4), and a valve core (5) is disposed inside between the valve seat (6) and the sleeve (4), the valve core (5) being located on one side of the iron core (1); A nameplate (10) is attached to one side of the surface of the outer casing (2); Lead wires (3) are connected to the surface of the outer casing (2); The other side of the outer casing (2) is connected to a rear cover (7); One end of the lead (3) is electrically connected to the coil (8); The outer surface of the lead (3) is made of insulating material.

Images