Permanent magnet magnetic opening and closing device

Abstract

The utility model discloses a permanent magnet iron opening and closing device, which belongs to the technical field of underwater operation equipment and comprises a shell, a fixed permanent magnet and a rotating permanent magnet, the rotating permanent magnet is arranged in the fixed permanent magnet and can rotate in the fixed permanent magnet, a motor is arranged in the middle of the top of the shell, and a gear is arranged at the output end of the motor. A rotating thread is arranged on the outer surface of the rotating permanent magnet and meshed with the gear. According to the permanent magnet magnetic opening and closing device, the motor rotates to drive the gear, the gear rotates to drive the rotating permanent magnet to rotate, the magnetic field of the permanent magnet is changed, the magnetic force is adjusted, and then the device and a target object are controlled to be attracted or separated. The permanent magnet ferromagnetic opening and closing device can be used for being adsorbed on an underwater target steel structure before operation of an underwater operation device and being separated from the target steel structure to be recycled after operation is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater operation equipment, in particular to a permanent magnet magnetic opening and closing device. Background Art

[0002] During underwater operations, it is often necessary to attach the operating device to the underwater steel structure using a magnetic device to carry out the operation and then detach it from the steel structure when the operation is completed. The current traditional method uses a DC electromagnet as the magnet in the magnetic opening and closing device. The magnetic force is generated by passing DC current through the coil. The magnetic pole direction is changed by changing the direction of the current to strengthen or weaken the magnetic force. During use, the circuit must be kept stable, which has certain limitations. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a permanent magnet magnetic opening and closing device. The size of the magnetic force of the magnetic opening and closing device is controlled by hydraulic power and is not limited in use.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a permanent magnet magnetic opening and closing device, including a shell, a fixed permanent magnet and a rotating permanent magnet, the rotating permanent magnet is arranged in the fixed permanent magnet, and the rotating permanent magnet rotates in the fixed permanent magnet, a motor is arranged in the middle part of the top of the shell, a gear is arranged at the output end of the motor, and a rotating thread is arranged on the outer surface of the rotating permanent magnet, and the rotating thread is engaged with the gear.

[0005] Preferably, a groove is provided in the middle of the top of the fixed permanent magnet, and a groove is also provided at a corresponding position on the outer shell, and the rotating thread on the outer surface of the rotating permanent magnet exposes the groove on the top of the fixed permanent magnet to engage with the gear.

[0006] Preferably, the rotating permanent magnet is cylindrical as a whole, and a rotating thread is provided on the outer surface of the rotating permanent magnet.

[0007] Preferably, the motor is a waterproof motor.

[0008] Preferably, the motor is fixed to the middle part of the top of the housing, and the motor and the gear are wrapped by a waterproof shell.

[0009] Preferably, the fixed permanent magnet is a circular radial magnet, the circular surface is equally divided into four magnetic pole areas along the radial direction, and the N pole and S pole are arranged at intervals.

[0010] Preferably, the rotating permanent magnet is a cylindrical radial magnet, which is nested in the inner space of the fixed permanent magnet. The cylindrical surface is equally divided into four magnetic pole areas along the radial direction, and the N poles and S poles are arranged at intervals.

[0011] The technical solution of the present invention can achieve the following beneficial effects:

[0012] This permanent magnet magnetic opening and closing device uses a motor to drive a gear, which in turn drives a rotating permanent magnet. This changes the permanent magnet's magnetic field, thereby adjusting the magnetic force and controlling the device's engagement or disengagement with a target object. This permanent magnet magnetic opening and closing device can be used to attach an underwater working device to a target steel structure before operation and to disengage and recover it after the operation is complete. This utility model has a simple structure, easy operation, and excellent reliability and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following is a brief description of the contents and symbols in the drawings of this specification:

[0014] Figure 1 Schematic diagram of the structure of the opening and closing device;

[0015] Figure 2 Schematic diagram of opening the permanent magnet poles;

[0016] Figure 3 Schematic diagram of closing the permanent magnet poles;

[0017] The markings in the above figures are: 1. Housing; 2. Motor; 3. Fixed permanent magnet; 4. Rotating permanent magnet. DETAILED DESCRIPTION

[0018] The following describes the embodiments with reference to the accompanying drawings to further illustrate the specific implementation of the present invention, such as the shape, structure, relative position and connection relationship between the various components involved, the function and working principle of each part, etc.

[0019] like Figure 1 As shown, the permanent magnet magnetic opening and closing device includes a shell 1, a fixed permanent magnet 3 and a rotating permanent magnet 4. The rotating permanent magnet 4 is arranged in the fixed permanent magnet 3 and rotates in the fixed permanent magnet 3. A motor 2 is arranged in the middle part of the top of the shell 1, a gear is arranged at the output end of the motor 2, and a rotating thread is arranged on the outer surface of the rotating permanent magnet 4, which is engaged with the gear. A groove is arranged in the middle part of the top of the fixed permanent magnet 3, and a groove is also arranged at a corresponding position on the shell 1. The rotating thread on the outer surface of the rotating permanent magnet 4 exposes the groove on the top of the fixed permanent magnet 3 and is engaged with the gear. The rotating permanent magnet 4 is cylindrical as a whole, and a rotating thread is arranged on the outer surface of the rotating permanent magnet 4. The motor 2 is a waterproof motor, which is fixed in the middle part of the top of the shell 1. The motor 2 and the gear are wrapped in a waterproof shell. As shown Figure 2 、 3As shown, the fixed permanent magnet 3 is a circular radial magnet, with the annular surface divided radially into four equal magnetic pole regions, with the north and south poles arranged alternately. The rotating permanent magnet 4 is a cylindrical radial magnet, nested within the interior space of the fixed permanent magnet 3. The cylindrical surface is divided radially into four equal magnetic pole regions, with the north and south poles arranged alternately.

[0020] like Figure 3 As shown, in the initial state, the magnetic pole direction of the fixed permanent magnet 3 is opposite to the magnetic pole direction of the rotating permanent magnet 4, and the magnetic fields of the two cancel each other out. At this time, the magnetic opening and closing device is in a closed state and has no magnetic force.

[0021] like Figure 2 As shown, when the magnetic opening and closing device is close to or in contact with the designed position of the target structure and is ready for operation, the motor 2 is started, and the gear drives the rotating permanent magnet 4 to rotate. When the rotating permanent magnet 4 rotates 90 degrees, the magnetic pole direction of the fixed permanent magnet 3 is the same as the magnetic pole direction of the rotating permanent magnet 4, and the magnetic fields of the two reinforce each other. At this time, the magnetic opening and closing device is in the open state, the magnetic force reaches the strongest, and the magnetic opening and closing device is completely adsorbed on the target structure.

[0022] After the underwater operation is completed, the motor 2 rotates in the reverse direction, causing the gear to rotate in the reverse direction, driving the rotating permanent magnet 4 to rotate in the reverse direction. When the rotating permanent magnet 4 rotates in the reverse direction by 90 degrees, it returns to the initial position (such as Figure 3 As shown in the position, the magnetic pole direction of the fixed permanent magnet 3 is opposite to the magnetic pole direction of the rotating permanent magnet 4, and the magnetic fields of the two cancel each other out. At this time, the magnetic opening and closing device is in the closed state, and the magnetic opening and closing device is disengaged from the target structure, completing all operations.

[0023] This permanent magnet magnetic opening and closing device uses a motor (2) to drive a gear, which in turn drives a rotating permanent magnet (4). This changes the permanent magnet's magnetic field, thereby adjusting the magnetic force and controlling the device's engagement or disengagement with a target. This permanent magnet magnetic opening and closing device can be used to attach an underwater working device to a target steel structure before operation and to disengage and recover it after the operation is complete. This utility model has a simple structure, easy operation, and excellent reliability and applicability.

[0024] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A permanent magnet magnetic opening and closing device, characterized in that: The invention comprises a shell, a fixed permanent magnet and a rotating permanent magnet. The rotating permanent magnet is arranged in the fixed permanent magnet and rotates in the fixed permanent magnet. A motor is arranged in the middle part of the top of the shell, a gear is arranged at the output end of the motor, and a rotating thread is arranged on the outer surface of the rotating permanent magnet, which is engaged with the gear.

2. The permanent magnet magnetic opening and closing device according to claim 1, characterized in that: A groove is provided in the middle of the top of the fixed permanent magnet, and a groove is also provided at a corresponding position on the shell. The rotating thread on the outer surface of the rotating permanent magnet exposes the groove on the top of the fixed permanent magnet and engages with the gear.

3. The permanent magnet magnetic opening and closing device according to claim 1, characterized in that: The rotating permanent magnet is cylindrical as a whole, and a rotating thread is provided on the outer surface of the rotating permanent magnet.

4. The permanent magnet magnetic opening and closing device according to claim 1, characterized in that: The motor is a waterproof motor.

5. The permanent magnet magnetic opening and closing device according to claim 1, characterized in that: The motor is fixed to the middle part of the top of the shell, and the motor and the gear are wrapped by the waterproof shell.

6. The permanent magnet magnetic opening and closing device according to claim 1, characterized in that: The fixed permanent magnet is a circular radial magnet, the circular surface of which is equally divided into four magnetic pole areas along the radial direction, and the N poles and S poles are arranged at intervals.

7. The permanent magnet magnetic opening and closing device according to claim 1, characterized in that: The rotating permanent magnet is a cylindrical radial magnet, which is nested in the inner space of the fixed permanent magnet. The cylindrical surface is equally divided into four magnetic pole areas along the radial direction, and the N poles and S poles are arranged at intervals.

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