CN207864734U - A spring return type electric actuator - Google Patents

Abstract

The utility model relates to the field of electric actuators, and in particular to a spring-reset electric actuator. The utility model has the advantages that when a power outage occurs during operation, the moving iron core of the electromagnet moves, and the ratchet anti-rotation mechanism is brought away from the motor gear, so that the motor gear can rotate. Under the action of the torsion spring, the main shaft rotates in the opposite direction, and the ball valve is closed, thereby ensuring that the pipeline can be disconnected in the event of a power outage, thereby avoiding waste of resources.

Description

A spring return type electric actuator

technical field

The utility model relates to the field of electric actuators, in particular to a spring return type electric actuator.

Background technique

An electric actuator is a drive device that can provide linear or rotary motion. It uses a certain driving energy and works under the action of a certain control signal. An actuator uses liquid, gas, electricity or other energy and converts it into drive action through a motor or other device.

Existing electric actuators cannot continue to work when the power is cut off, causing the valves to fail to close in time, resulting in a waste of resources.

Utility model content

In order to solve the above existing problems, the utility model provides a spring return type electric actuator.

A spring return type electric actuator includes a cover, a bottom case and a ball valve. A mounting plate is provided at the opening of the bottom case, and a motor, a gear and a torsion spring are provided on the mounting plate, wherein the teeth on the base of the gear and the torsion spring engage with each other, the gear is mounted on the main shaft, and the main shaft penetrates the mounting plate and the bottom The shell is connected with the ball valve.

The output shaft of the motor penetrates the mounting plate and extends into the bottom shell, the motor gear arranged on the output shaft of the motor engages with the large toothed plate of the first double gear, and the small toothed plate of the first double gear engages with the second double gear. The large chainrings of the gears are engaged.

The main shaft is provided with a sector gear at the inner position of the bottom shell, and the sector gear and the small toothed plate of the second duplex gear mesh with each other.

In the bottom case, an electromagnet is arranged next to the motor gear, and the electromagnet is electrically connected to the motor; a ratchet stop mechanism is arranged on the electromagnet, and the ratchet stop mechanism acts on the motor gear; the bottom case Inside, a limit switch is arranged on one side of the sector gear, and the limit switch is electrically connected with the motor.

As a further solution of the present utility model: the cover and the bottom case are connected by bolts.

As a further solution of the present utility model: the contact surface between the cover and the bottom shell is provided with a rubber sealing ring.

As a further solution of the present utility model: the first dual gear and the second dual gear are fixed on the inner bottom surface of the bottom shell through shafts.

As a further solution of the present utility model: a bracket is provided between the bottom shell and the ball valve.

The beneficial effects of the utility model: when the power is cut off suddenly during work, the moving iron core of the electromagnet moves, and the ratchet stop mechanism is taken away from the motor gear, so that the motor gear can rotate, and under the action of the torsion spring, the main shaft rotates in the opposite direction , the ball valve is closed, which ensures that the pipeline can be disconnected in the event of a power failure, and avoids the waste of resources.

Description of drawings

Fig. 1 is a schematic diagram of a spring return type electric actuator of the present invention.

Fig. 2 is a schematic diagram of the internal structure of a spring return type electric actuator of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in FIG. 1 and FIG. 2 , the utility model provides a spring return type electric actuator, which includes a cover 1 , a bottom case 2 and a ball valve 3 . The cover 1 and the bottom case 2 are connected by bolts, and a rubber sealing ring is arranged at the contact position. A bracket is arranged between the bottom case and the ball valve.

The opening of the bottom case 2 is provided with a mounting plate 21, the mounting plate 21 is provided with a motor 11, a gear 12 and a torsion spring 13, wherein the teeth on the gear 12 and the torsion spring base are engaged with each other, and the gear 12 is installed on the main shaft 27 Above, the main shaft 27 penetrates the mounting plate and the bottom case 2 to connect with the ball valve 3 .

The output shaft of the motor 11 penetrates the mounting plate 21 and extends into the cavity of the bottom case 2, the motor gear 23 arranged on the output shaft of the motor 11 engages with the large toothed disc of the first double gear 24, and the first double gear The small toothed disc of 24 meshes with the large toothed disc of the second duplex gear 25, so far, the motor gear 23, the first duplex gear 24 and the second duplex gear 25 form a gear reduction mechanism, which reduces the motor speed and increases the torque . The first dual gear and the second dual gear are fixed on the inner bottom surface of the bottom case through shafts.

The main shaft 27 is provided with a sector gear 26 in the cavity of the bottom case 2, and the sector gear 26 and the small tooth plate of the second duplex gear 25 are engaged with each other. So far, the motor 11 and the torsion spring 13 are connected through the shaft and the gear. .

In the bottom case 2, an electromagnet 22 is arranged next to the motor gear 23, and the electromagnet 22 is electrically connected with the motor; the electromagnet 22 is provided with a ratchet anti-rotation mechanism, which acts on the motor gear 23; the bottom case 2, a limit switch 28 is arranged on one side of the sector gear 26, and the limit switch 28 is electrically connected to the motor. When the sector gear turns over a certain angle, the limit switch will be touched, and the motor 11 will stop rotating.

The following is the specific working method of the present utility model: when the power is turned on, the motor 11 starts, the motor 11 drives the motor gear 23 to rotate, the motor gear 23 drives the first double gear 24 to rotate, and the first double gear 24 drives the second double gear The gear 25 rotates, the second duplex gear 25 drives the sector gear 26 to rotate, the main shaft 27 follows the sector gear 26 to rotate, and opens the valve of the ball valve 3, at the same time the main shaft 27 drives the gear 12 to rotate, the gear 12 drives the torsion spring 13, and the torsion spring 13 rotates and loads , when the main shaft 27 turns over a certain angle and the ball valve 3 is fully opened, the sector gear 26 touches the limit switch 28, and the motor 11 stops rotating. If there is a sudden power failure during work, the moving iron core of the electromagnet 22 moves, and the ratchet stop mechanism is taken away from the motor gear 23, so that the motor gear 23 can rotate, and under the action of the torsion spring 13, the main shaft 27 reversely rotates, Ball valve 3 is closed.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modification, equivalent replacement or improvement made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (5)

1. A spring-return type electric actuator, including a cover, a bottom case and a ball valve, is characterized in that a mounting plate is arranged at the opening of the bottom case, and a motor, a gear and a torsion spring are arranged on the mounting plate, wherein the gear and The teeth on the torsion spring base mesh with each other, the gears are installed on the main shaft, and the main shaft penetrates the mounting plate and the bottom shell to connect with the ball valve; The output shaft of the motor penetrates the mounting plate and extends into the bottom shell, the motor gear arranged on the output shaft of the motor engages with the large toothed plate of the first double gear, and the small toothed plate of the first double gear engages with the second double gear. The large chainring of the gear is engaged; The main shaft is provided with a sector gear at the inner position of the bottom shell, and the sector gear and the small toothed plate of the second duplex gear mesh with each other; In the bottom case, an electromagnet is arranged next to the motor gear, and the electromagnet is electrically connected to the motor; a ratchet stop mechanism is arranged on the electromagnet, and the ratchet stop mechanism acts on the motor gear; the bottom case Inside, a limit switch is arranged on one side of the sector gear, and the limit switch is electrically connected with the motor. 2. A spring-return type electric actuator according to claim 1, wherein the cover and the bottom case are connected by bolts. 3. A spring-return electric actuator according to claim 2, wherein a rubber sealing ring is provided on the contact surface between the cover and the bottom case. 4. A spring-return type electric actuator according to claim 1, characterized in that, the first double gear and the second double gear are fixed on the inner bottom surface of the bottom case through shafts. 5. A spring-return type electric actuator according to claim 1, wherein a bracket is provided between the bottom case and the ball valve.