Magnetic circuit combination structure of electromagnetic valve

Abstract

The invention discloses a magnetic circuit combination structure of an electromagnetic valve, and relates to the technical field of electromagnetic valves. Comprising an electromagnetic wire winding support, a magnetic conductive frame, a magnet, an upper fixed iron core, a lower fixed iron core, a movable iron core, movable iron core sealing soft rubber, an electromagnetic coil and a magnetic conductive frame fixing piece. A magnet is placed on the inner side of the magnetic conductive frame, the magnetic conductive frame, the matched magnetic conductive frame fixing piece, the upper fixed iron core and the lower fixed iron core are assembled together to form a complete magnetic field loop, and the assembled magnetic field loop wraps or surrounds the electromagnetic wire winding support so that a complete magnetic field encirclement ring can be formed in the center of the electromagnetic wire winding support. A through hole is formed in the center of the electromagnetic winding support, the electromagnetic winding support, the upper fixed iron core and the lower fixed iron core are assembled to form a closed movable iron core moving cavity, the movable iron core moving cavity is used for containing a movable iron core, and the electromagnetic wire winding support is provided with an electromagnetic coil position used for winding an electromagnetic coil. The movable iron core is driven to move by instantly electrifying the electromagnetic coil and changing the electrode direction of the electromagnetic coil to generate electromagnetic force in different directions, and the movable iron core is attracted to the upper fixed iron core or the lower fixed iron core through the magnetic field loop under the condition that the electromagnetic coil is stopped being electrified, so that the effect of stabilizing the switch valve is achieved. The structure design is reasonable, the production efficiency is high, the stroke of the movable iron core is large, the movable iron core is adsorbed and fixed by magnetic force when the valve is opened and closed, the performance is stable, and high practicability is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of solenoid valves, and in particular to a magnetic circuit combination structure of a solenoid valve. Background Art

[0002] The moving iron core of a traditional solenoid valve is not attracted by magnetic force or magnetic conductors. It is easy for the moving iron core to move due to vibration and be attracted to the upper fixed iron core, causing the valve to open by mistake and wasting water or gas resources.

[0003] In traditional solenoid valves, the sealing rubber of the moving iron core extends outside the magnetic circuit assembly, which causes the negative pressure of the pressure relief hole, the flow direction and pressure of the medium used to cause the sealing rubber of the moving iron core to deform and produce greater resistance when the valve is opened. This shortens the stroke of the solenoid valve, requires high stroke accuracy, and makes production difficult. It also requires high voltage and pulse width when the solenoid valve is switched on and off, which makes the power consumption of the entire solenoid valve magnetic circuit assembly too high and generates heat, greatly affecting its life and performance stability.

[0004] In summary, the present invention designs a bistable pulse solenoid valve magnetic circuit combination, which improves the switching valve ability of the solenoid valve under high pressure state and increases the stroke of the moving iron core inside the solenoid valve through structural optimization, thereby reducing the shortcomings of traditional solenoid valves such as production difficulties caused by high stroke accuracy requirements, high power consumption of solenoid valves, unstable performance, easy failure to shut off water, and low production efficiency. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a solenoid valve magnetic circuit combination structure with reasonable structural design, high production efficiency, high stroke accuracy and strong practicality.

[0006] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a solenoid valve magnetic circuit combination structure, including an electromagnetic wire winding bracket, a magnetic frame, a magnet, an upper fixed iron core, a lower fixed iron core, a moving iron core assembly, a moving iron core reset spring, a moving iron core sealing soft glue, an electromagnetic coil and a magnetic frame fixing plate, one or more magnets are placed on the inner side of the magnetic frame, and the upper and lower ends of the center of the magnetic frame are respectively provided with an upper fixed iron core and a lower fixed iron core, the upper fixed iron core cooperates with the moving iron core assembly through the moving iron core reset spring, and the lower end of the moving iron core assembly cooperates with the lower fixed iron core through the moving iron core sealant, and the outer rings of the upper fixed iron core, the lower fixed iron core and the moving iron core assembly are provided with an electromagnetic wire winding bracket, and the electromagnetic wire winding bracket is wound with an electromagnetic coil outside for connecting to an external driving power supply to drive the moving iron core assembly to move to achieve the effect of switching the valve; the magnetic frame guides the magnetic force of the magnet to the matching magnetic frame fixing plate, the upper fixed iron core and the lower fixed iron core through the magnet placed on the inner side, so that they are assembled together to form a complete magnetic field circuit.

[0007] Beneficial effects of the present invention: The present invention places a magnet on the inner side of a magnetic frame (shell), and forms a complete circuit by connecting the magnetic frame with the magnetic frame bottom plate, and the upper and lower fixed iron cores, so that each surface of the moving iron core assembly is surrounded by the assistance of magnetic force, and the moving iron core assembly is pushed to be adsorbed on the upper fixed iron core or the corresponding contact surface of the lower fixed iron core by instantaneous energization of the electromagnetic coil and switching of the electrodes. Since the moving iron core assembly is completely built into the electronic valve magnetic circuit assembly and moves around, the closed magnetic circuit surrounding assistance can greatly reduce the resistance of the moving iron core assembly when moving, and reduce the resistance caused by the deformation and outward swinging movement of the moving iron core sealing soft rubber in the matching valve pressure relief hole due to negative pressure and the pressure and flow direction of the medium used, thereby leading to industry pain points such as unstable solenoid valve switching, high valve opening voltage requirement, high power consumption, short stroke of the moving iron core assembly and poor control. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments; Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 Another perspective schematic diagram of the present invention; Figure 4 It is a three-dimensional exploded view of the present invention; Figure 5 Another perspective exploded view of the present invention; Figure 6 It is a simplified working principle diagram of the present invention; Figure 7 Schematic diagram of the valve closed state of the present invention and the matching valve assembly in actual application (in the figure, A is the electromagnetic valve circuit combination structure, B is the matching valve assembly, and C is the matching valve pressure relief hole); Figure 8 for Figure 7 An enlarged schematic diagram of part I. Implementation

[0009] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0010] Reference Figure 1-6, this specific embodiment adopts the following technical scheme: a solenoid valve magnetic circuit combination structure, including an electromagnetic wire winding bracket 1, a magnetic frame 2, a magnet 3, an upper fixed iron core 4, a lower fixed iron core 5, a moving iron core assembly 6, a moving iron core spring 7, an electromagnetic coil 8 and a magnetic frame fixing plate 9; a magnet 3 is placed on the inner side of the magnetic frame 2, and the magnetic frame 3 is assembled with the matching magnetic frame fixing plate 9, the upper fixed iron core 4, and the lower fixed iron core 5 to form a complete magnetic field circuit; a through hole 1.1 is provided in the center of the electromagnetic wire winding bracket 1 for assembling the upper fixed iron core 4, the moving iron core assembly 6 and the lower iron core 5, and the electromagnetic coil 8 is wound or assembled on the electromagnetic wire winding bracket 1; the moving iron core assembly 6 is composed of The magnetic conductor and the soft sealing component are assembled together, and the top surface of one end of the moving iron core assembly 6 is adsorbed on the upper fixed iron core 4 or the lower fixed iron core 5 when the valve is switched; the upper fixed iron core 4, the moving iron core assembly 6 and the lower fixed iron core 5 are assembled in the central through hole 1.1 of the electromagnetic wire winding bracket in sequence; the magnetic frame 2 and the magnetic frame fixing plate 9 are assembled together by buckling or stamping deformation and tight fitting to form a magnetic conductor; the magnetic end face of the lower fixed iron core 5 close to the moving iron core assembly 6 or the side of the lower fixed iron core 5 is provided with one or more guide ports or guide holes 5.1 for the flow of the medium used inside the magnetic combination of the electromagnetic valve, thereby reducing the resistance of the moving iron core assembly 6.

[0011] It is worth noting that the magnetic frame 2 is made of metal magnetic material.

[0012] The working principle of this specific implementation is: one or more strong magnets are arranged on the inner side of the magnetic frame, and the magnetic properties of the magnetic sheets on the left and right ends of the coil are as follows: Figure 6 As shown, without considering the spring force and the gravity of the moving iron core, it can be considered that the moving iron core is in a suspended state when it is not powered on. The open state is left S and right N, the opposite polarities on the left attract each other, and the same polarity on the right repels each other, and the moving iron core moves to the left. Similarly, the closed state is left N and right S, and the moving iron core moves to the right. The same coil can generate double the suction or thrust, so it has the characteristics of narrow driving pulse width and power saving, so it can be designed in a miniaturized way. The entire solenoid valve magnetic field forms a loop to ensure that the magnetic force on the moving iron core is balanced. When the coil assists the moving iron core to move up and down, the magnetic force is the same, so that the coil drives the moving iron core to form a mutual driving force. In addition, because the moving iron core adopts a two-stage retractable method, the slight shaking of the rubber particle sealing surface will not cause the position of the moving iron core to change. In other words, it has strong resistance to mechanical vibration and pipeline reflux, and will not switch from the closed valve state to the open valve state. It can achieve stable valve closing and avoid the occurrence of long water flow.

[0013] Reference Figure 7, the electromagnetic valve magnetic combination of the present invention is applied to the valve. When the electromagnetic valve is in a closed state, it is adsorbed by the magnetic force of the lower fixed iron core 5, and the metal surface of the moving iron core assembly 6 in the direction of the moving iron core sealing soft glue 6.1 is adsorbed on the upper end surface of the lower fixed iron core, and the moving iron core sealing soft glue 6.1 is pressed against the pressure relief hole of the valve through its own elasticity to prevent the pressure from escaping through the pressure relief hole to achieve the effect of closing the valve. Under the influence of the magnetic forces of all surfaces and the internal pressure, the moving iron core assembly will not be separated due to external forces such as pipeline vibration and water hammer reverse force, so as to achieve the effect of stable performance and avoid the phenomenon of accidental opening of the valve; when the moving iron core assembly 6 is adsorbed or leaves the lower fixed iron core 5, tension will be generated at the moment. At this time, one or more guide ports or guide holes 5.1 are added to the lower fixed iron core 5 to allow the circulation of the medium used, reduce the resistance, and enable the moving iron core assembly 6 to move under balanced pressure, thereby greatly reducing the power consumption of the electromagnetic valve.

[0014] The moving iron core of this specific implementation is built into the entire magnetic circuit combination and has magnetic assistance when moving up and down. It is adsorbed on the upper fixed iron core when opening the valve, and is adsorbed on the lower fixed iron core when closing the valve. This can effectively prevent the phenomenon of accidental valve opening caused by the moving iron core leaving due to external forces such as water hammer and vibration, thereby greatly improving the stability of the solenoid valve.

[0015] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A solenoid valve magnetic circuit combination structure, characterized in that: The invention comprises an electromagnetic wire winding support (1), a magnetic frame (2), a magnet (3), an upper fixed iron core (4), a lower fixed iron core (5), a moving iron core assembly (6), a moving iron core spring (7), an electromagnetic coil (8) and a magnetic frame fixing plate (9); a magnet (3) is placed inside the magnetic frame (2); the magnetic frame (3) is assembled with a matching magnetic frame fixing plate (9), an upper fixed iron core (4) and a lower fixed iron core (5) to form a complete magnetic field loop; a through hole (1.1) is provided at the center of the electromagnetic wire winding support (1) for assembling the upper fixed iron core (4), the moving iron core assembly (6) and the lower iron core (5); and the electromagnetic coil (8) is wound or assembled on the electromagnetic wire winding support (1).

2. The solenoid valve magnetic circuit combination structure according to claim 1, characterized in that: The movable iron core assembly (6) is composed of a magnetic conductor and a soft sealing member. When the valve is switched, the top surface of one end of the movable iron core assembly (6) is adsorbed on the upper fixed iron core (4) or the lower fixed iron core (5).

3. The solenoid valve magnetic circuit combination structure according to claim 1, characterized in that: The upper fixed iron core (4), the moving iron core assembly (6) and the lower fixed iron core (5) are sequentially assembled in the central through hole (1.1) of the electromagnetic wire winding bracket.

4. The solenoid valve magnetic circuit combination structure according to claim 1, characterized in that: The magnetic conductive frame (2) and the magnetic conductive frame fixing plate (9) are assembled together by buckling or stamping to form a magnetic conductive body.

5. The solenoid valve magnetic circuit combination structure according to claim 1, characterized in that: The magnetic end surface of the lower fixed iron core (5) close to the moving iron core assembly (6) or the side surface of the lower fixed iron core (5) is provided with one or more guide ports or guide holes (5.1) for the flow of the medium used inside the magnetic combination of the solenoid valve, thereby reducing the resistance of the moving iron core assembly (6).

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