Electromagnetic valve based on bipolar coil driving

Abstract

The utility model discloses an electromagnetic valve based on bipolar coil driving. The electromagnetic valve comprises an electromagnet, an upper end valve seat and an electromagnetic valve body. The electromagnet is embedded and fixed to the top of the upper end valve seat, and a pulse magnetic field is generated through the electromagnetic coil and directly acts on the permanent magnet valve element below. The bottom surface of the upper-end valve seat is a plane and is in flexible contact with the top end of the electromagnetic valve body through an elastic washer; the electromagnetic valve body is cylindrical and is axially embedded into an inner cavity of the electromagnetic valve body in a sliding mode, and the outer circle of a valve element of the electromagnetic valve body is precisely matched with the valve body. Extension and retraction of the valve body are directly controlled by switching the current direction of the coil without depending on auxiliary control systems such as a gas circuit and an oil circuit. According to the design, the current state of the valve body can be automatically kept during power failure or system failure, equipment misoperation caused by sudden power loss is effectively avoided, and the safety and reliability of the system are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to an electromagnetic valve based on bipolar coil drive. Background Technology

[0002] Currently, conventional solenoid valve control uses electromagnetic force generated by controlling a solenoid coil to control the valve body's movement. This technology has the following drawbacks:

[0003] 1. Valves that require pneumatic or hydraulic circuits to control the extension and retraction of their bodies, such as pneumatic cylinders or hydraulic cylinder control valves;

[0004] 2. In the event of a power outage or a failure of the auxiliary control (oil / air circuit), the position of the valve body itself will change;

[0005] 3. The control circuit cannot change the extension and retraction of the valve body by changing the coil polarity;

[0006] 4. The solenoid valve requires a continuous power supply to maintain its state, resulting in a relatively short lifespan. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, this application proposes a solenoid valve based on bipolar coil drive to solve the problems existing in the prior art.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A solenoid valve based on bipolar coil drive includes an electromagnet, an upper valve seat, and a solenoid valve body. The electromagnet is nested and fixed on the top of the upper valve seat, and generates a pulsed magnetic field through the electromagnetic coil, which directly acts on the lower solenoid valve body. The bottom surface of the upper valve seat is flat and flexibly contacts the top of the solenoid valve body through an elastic washer. The solenoid valve body is cylindrical and axially slides into the inner cavity of the solenoid valve body. The outer circle of the valve core of the solenoid valve body is precisely matched with the valve body. The top of the valve core is magnetically attracted to the upper valve seat, and the bottom is magnetically attracted to the lower valve seat or reset by elastic force. The lower valve seat is sealed to the valve body, and the bottom of the solenoid valve body is radially sealed to the lower valve seat through a sealing ring embedded in the groove of the valve body. The bottom surface of the lower valve seat is a flange structure and is rigidly fixed to external equipment by screws, washer one, washer two, and self-locking nuts. The elastic washer is fitted on the top of the valve core, between the upper valve seat and the solenoid valve body.

[0010] As a further technical solution of this utility model: the valve core of the electromagnetic valve body is made of a high coercivity permanent magnet material.

[0011] As a further technical solution of this utility model: the electromagnetic valve body also includes a pulse magnetic field coil, which is arranged outside the valve body and generates a high-intensity magnetic field through instantaneous discharge to trigger the valve core magnetic pole reversal.

[0012] As a further technical solution of this utility model: the electromagnetic valve body also includes a magnetically conductive valve body, which constitutes a magnetic circuit channel.

[0013] As a further technical solution of this utility model: the thickness of the elastic washer is 2-3mm, and the material is a stainless steel corrugated spring.

[0014] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0015] 1. This invention employs pure electromagnetic polarity switching control to achieve the attraction and release of the suction cup. By precisely changing the current direction (polarity) of the electromagnetic coil, the direction of the magnetic field is directly controlled, thereby driving the suction cup to move. Compared to traditional electromagnets that rely on power-on / off control, this design can maintain its previous attraction / release state even under power failure or extreme environments (such as high and low temperatures, strong vibration, and electromagnetic interference), preventing the suction cup from going out of control due to accidental power outages. This power-off self-holding characteristic significantly improves the reliability, safety, and stability of the equipment in harsh scenarios such as industrial automation and aerospace, avoiding safety accidents caused by accidental power failures.

[0016] 2. By eliminating the need for pneumatic / oil circuits, all functions are achieved solely through the collaborative design of electromagnetic coils and permanent magnets, resulting in a highly integrated overall structure and a reduction of over 50% in the number of components. This pipeline-free and fluid-medium-free design not only avoids risks such as seal aging and media contamination but also significantly reduces installation complexity, making it particularly suitable for applications with compact structures and no auxiliary features (pneumatic / oil circuits).

[0017] 3. By using a pulsed magnetic field to change the magnetization direction of the solenoid valve body in a non-contact manner, it features no mechanical friction, pulsed control, and does not require additional power to the coil to maintain its position after adsorption and release. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the installation of the solenoid valve of this utility model.

[0019] Figure 2 This is a schematic diagram of the overall structure of the solenoid valve of this utility model.

[0020] Figure 3 This is a schematic diagram illustrating the working principle of the solenoid valve of this utility model.

[0021] In the diagram: 1-Electromagnet, 2-Upper valve seat; 3-Solenoid valve body; 4-Lower valve seat; 5-Elastic washer; 6-Washer; 7-Self-locking nut; 8-Screw; 9-Washer; 10-Sealing ring. Detailed Implementation

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

[0023] Example 1, such as Figure 1-3 As shown, a solenoid valve based on bipolar coil drive includes an electromagnet 1, an upper valve seat 2, and a solenoid valve body 3. The electromagnet 1 is nested and fixed on the top of the upper valve seat 2, and generates a pulsed magnetic field through the electromagnetic coil, which directly acts on the lower solenoid valve body 3. The bottom surface of the upper valve seat 2 is flat and flexibly contacts the top of the solenoid valve body 3 through an elastic washer 5. The solenoid valve body 3 is cylindrical and axially slides into the inner cavity of the solenoid valve body 3. The outer circle of the valve core of the solenoid valve body 3 is precisely matched with the valve body. The top of the valve core is magnetically attracted to the upper valve seat 2, and the bottom is magnetically attracted to the lower valve seat 4 and reset by elastic force. The lower valve seat 4 is sealed to the valve body, and the bottom of the solenoid valve body 3 is radially sealed to the lower valve seat 4 through a sealing ring 10. The sealing ring is embedded in the groove of the valve body. The bottom surface of the lower valve seat 4 is a flange structure and is rigidly fixed to external equipment by screws 8, washers 1 6, washers 2 9, and self-locking nuts 7. The elastic washer 5 is fitted on the top of the valve core and is located between the upper valve seat 2 and the solenoid valve body 3.

[0024] The working principle is as follows:

[0025] As attached Figure 1 As shown, the electromagnetic coil is placed at each extreme position, with pulses lasting approximately 0.5 seconds. Once a position is reached, the solenoid valve is idle, and the load remains in that position. The control principle is as follows: when A is connected to + and B is connected to -, the solenoid valve controls the suction cup to engage; when A is connected to - and B is connected to +, the solenoid valve controls the suction cup to release.

[0026] As attached Figure 2 As shown, this is the overall structural design. Item 1 is the electromagnet; item 2 is the upper valve seat; item 3 is the solenoid valve body; item 4 is the lower valve seat; item 5 is the elastic washer; item 6 is the washer; item 7 is the self-locking nut; item 8 is the screw; item 9 is the washer; and item 10 is the sealing ring.

[0027] This invention relates to a technology that uses a high-intensity, short-duration pulsed magnetic field to change the magnetization direction of a permanent magnet, thereby enabling the adsorption and release of a chuck solenoid valve. Its core principles involve magnetic domain reversal and coercivity breakthroughs, enabling non-contact, rapid magnetic pole switching. See details... Figure 3 .

[0028] The core components of this design include:

[0029] Solenoid valve body: made of a high coercivity permanent magnet material (such as NdFeB), and its position is determined by the magnetization direction (e.g., closed when the N pole is to the left, and open when the S pole is to the left).

[0030] Pulse magnetic field coil: Located outside the valve body, it generates a high-intensity magnetic field through instantaneous discharge, triggering the valve core magnetic pole reversal;

[0031] Magnetic valve body: forms a magnetic circuit channel and enhances the utilization of magnetic field (e.g., soft magnetic alloy).

[0032] The workflow is as follows:

[0033] Initial state:

[0034] The solenoid valve body is pre-magnetized with the magnetic pole direction fixed, and is attracted to the valve seat by magnetic attraction (closed state).

[0035] Valve -> Adsorption:

[0036] Applying a positive pulse current to the coil → generating a reverse magnetic field → the valve core magnetic poles flip (N / S poles interchange) → the magnetic attraction force reverses direction → the valve core detaches from the valve seat and moves to the adsorption position;

[0037] Valve -> Release:

[0038] Applying a reverse pulse current → the valve core magnetic poles return to their initial direction → the magnetic attraction pulls the valve core back to the valve seat.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. A solenoid valve based on bipolar coil drive, comprising an electromagnet (1), an upper valve seat (2), and a solenoid valve body (3); characterized in that, The electromagnet (1) is nested and fixed to the top of the upper valve seat (2), and generates a pulsed magnetic field through the electromagnetic coil, which directly acts on the lower electromagnetic valve body (3); the bottom surface of the upper valve seat (2) is flat and flexibly contacts the top of the electromagnetic valve body (3) through an elastic washer (5); the electromagnetic valve body (3) is cylindrical and axially slides into the inner cavity of the electromagnetic valve body (3), and the outer circle of the valve core of the electromagnetic valve body (3) is precisely matched with the valve body; the top of the valve core of the electromagnetic valve body (3) is connected to the upper valve seat (2) by magnetic attraction, and the bottom is connected to the lower valve body (2) through magnetic attraction. The end valve seat (4) is reset by magnetic attraction or elastic force; the lower end valve seat (4) is sealed with the valve body, and the bottom end of the solenoid valve body (3) and the lower end valve seat (4) are radially sealed by a sealing ring (10). The sealing ring is embedded in the groove of the valve body. The bottom surface of the lower end valve seat (4) is a flange structure, which is rigidly fixed to the external equipment by screws (8), gasket one (6), gasket two (9) and self-locking nut (7); the elastic gasket (5) is fitted on the top of the valve core of the solenoid valve body (3) and is located between the upper end valve seat (2) and the solenoid valve body (3).

2. The solenoid valve based on bipolar coil drive according to claim 1, characterized in that, The valve core of the solenoid valve body (3) is made of a high coercivity permanent magnet material.

3. The solenoid valve based on bipolar coil drive according to claim 2, characterized in that, The solenoid valve body (3) also includes a pulse magnetic field coil, which is arranged outside the valve body and generates a high-intensity magnetic field through instantaneous discharge to trigger the valve core magnetic pole reversal.

4. The solenoid valve based on bipolar coil drive according to claim 3, characterized in that, The solenoid valve body (3) also includes a magnetic valve body, which forms a magnetic circuit channel.

5. The solenoid valve based on bipolar coil drive according to claim 1, characterized in that, The elastic washer (5) has a thickness of 2-3mm and is made of stainless steel corrugated spring.

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