Multi-rotation electric actuator with explosion-proof function

Abstract

The utility model discloses a multi-rotation electric actuator with explosion -proof function, include: explosion -proof main casing, the front end outer wall of explosion -proof main casing is equipped with explosion -proof auxiliary casing, explosion -proof main casing is rectangular structure, explosion -proof auxiliary casing is circular structure, the rear end outer wall of explosion -proof main casing is fixed and installed first cover through bolt, the front end outer wall of explosion -proof auxiliary casing is fixed and installed second cover through bolt, drive subassembly, including explosion -proof motor, the output of explosion -proof motor is connected multi -rotation speed reducer, relate to multi -rotation electric actuator technical field, form closed chamber through explosion -proof main casing and explosion -proof auxiliary casing, cooperate first explosion -proof seal ring, second explosion -proof seal ring and explosion -proof type gran head, can effectively prevent flammable and explosive gas invasion, explosion -proof motor and intrinsic safety type controller avoid the inside generation of kindling source, can use safely in high -risk environment such as petroleum chemical industry, natural gas, reduce the explosion risk.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a multi-rotation electric actuator with explosion-proof function. Background Technology

[0002] In industrial settings such as petrochemicals, natural gas transportation, and coal chemicals where flammable and explosive media exist, multi-turn electric actuators are core equipment for controlling valve opening and closing and regulation. Their safety and stability are directly related to the normal operation of the production system. Currently, traditional multi-turn electric actuators mostly use ordinary cast iron for their housings, with simple sealing structures and gaps easily appearing at the connections, allowing flammable and explosive gases to seep into the interior. The explosion-proof rating of the motor and electrical components is insufficient, and the electric sparks or high temperatures generated during operation can easily ignite external flammable media. During high-speed multi-turn motion, the transmission components are prone to generating sparks due to gear meshing friction, and there is a lack of effective explosion-proof measures, which cannot block the spread of explosion flames. In addition, some actuators have low multi-turn transmission accuracy and are prone to jamming during frequent forward and reverse rotation, which not only affects the valve control accuracy but may also cause safety hazards due to mechanical failures, making it difficult to meet the needs of use in high-risk environments. Utility Model Content

[0003] The purpose of this invention is to provide a multi-rotation electric actuator with explosion-proof function to solve the problem of lack of effective explosion-proof measures mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multi-turn electric actuator with explosion-proof function, comprising: An explosion-proof main housing is provided with an explosion-proof secondary housing on the front outer wall of the explosion-proof main housing. The explosion-proof main housing has a rectangular structure, and the explosion-proof secondary housing has a circular structure. A first cover plate is fixedly installed on the rear outer wall of the explosion-proof main housing by bolts, and a second cover plate is fixedly installed on the front outer wall of the explosion-proof secondary housing by bolts. The drive assembly includes an explosion-proof motor, the output end of which is connected to a multi-turn reducer, and the outer wall of the output shaft of the multi-turn reducer is provided with an explosion-proof brake.

[0005] In a preferred embodiment of this utility model, the explosion-proof main housing and the explosion-proof secondary housing are made of cast aluminum alloy. A first explosion-proof sealing ring is fixedly installed at the connection between the explosion-proof main housing and the first cover plate. A groove is provided on the inner wall of the front end of the explosion-proof secondary housing.

[0006] In a preferred embodiment of this utility model, a second explosion-proof sealing ring is fixedly installed between the explosion-proof sub-shell and the second cover plate, the explosion-proof sub-shell is installed on the top of the base, and anti-slip pads are fixedly installed at the four corners of the bottom of the base.

[0007] In a preferred embodiment of this utility model, the first and second explosion-proof sealing rings are made of oil-resistant nitrile rubber with a trapezoidal cross-section. An explosion-proof gland is fixedly installed on the side wall of the explosion-proof main housing to seal the cable insertion part.

[0008] In a preferred embodiment of this utility model, the explosion-proof motor is an explosion-proof three-phase asynchronous motor, the explosion-proof motor is installed inside the explosion-proof main housing, and the explosion-proof brake is used to achieve emergency braking when power is lost.

[0009] In a preferred embodiment of this utility model, the multi-turn reducer is made of high-strength alloy steel, the gear surface in the multi-turn reducer is coated with a nickel-phosphorus alloy wear-resistant coating, and the output shaft of the multi-turn reducer passes through the inner wall of the second cover plate and is installed in conjunction with an explosion-proof bearing.

[0010] In a preferred embodiment of this utility model, heat dissipation fins are uniformly fixedly installed on both outer walls of the explosion-proof main housing, and the heating parts of the explosion-proof motor, multi-turn reducer and explosion-proof brake are connected to the explosion-proof main housing for heat dissipation.

[0011] In a preferred embodiment of this utility model, a controller is fixedly installed on the top outer wall of the explosion-proof main housing, a display screen and limit switches are fixedly installed on the outer wall of the controller, an intrinsically safe circuit board is provided inside the controller, and the controller is electrically connected to the explosion-proof motor, the multi-turn reducer and the explosion-proof brake. The controller is used to monitor the output torque and realize overload protection.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0013] 1. The explosion-proof main housing and the explosion-proof secondary housing form a closed chamber, which, together with the first explosion-proof sealing ring, the second explosion-proof sealing ring and the flameproof gland, can effectively prevent flammable and explosive gases from entering; the explosion-proof motor and intrinsically safe controller avoid the generation of ignition sources inside, and can be used safely in high-risk environments such as petrochemical and natural gas industries, reducing the risk of explosion; 2. The wear-resistant coating of the multi-turn reducer reduces friction loss and, together with the explosion-proof brake, achieves reliable braking and ensures the transmission accuracy of the multi-turn gear. The heat dissipation fins of the explosion-proof main housing and the heat transfer design of the heat-generating components improve heat dissipation efficiency. The overload protection and stroke control functions of the controller further ensure the long-term stable operation of the equipment and extend its service life. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the main structure of a multi-turn electric actuator with explosion-proof function; Figure 2 A top view of the structure of a multi-turn electric actuator with explosion-proof function; Figure 3 This is a rear view schematic diagram of a multi-turn electric actuator with explosion-proof function. Figure 4 This is an exploded structural diagram of a multi-turn electric actuator with explosion-proof function. Figure 5 This is a schematic diagram of the main housing structure in a multi-turn electric actuator with explosion-proof function.

[0015] In the diagram: base 100, anti-slip pad 110, explosion-proof main housing 200, explosion-proof secondary housing 210, groove 211, flameproof gland 220, heat dissipation fins 230, first cover plate 240, first explosion-proof sealing ring 241, second cover plate 250, second explosion-proof sealing ring 251, flameproof gland 260, explosion-proof motor 300, multi-turn reducer 310, explosion-proof brake 320, controller 400, display screen 410, limit switch 420. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] Example 1: As Figures 1-4 ,include: An explosion-proof main housing 200 is provided with an explosion-proof secondary housing 210 on the front outer wall of the explosion-proof main housing 200. The explosion-proof main housing 200 has a rectangular structure, and the explosion-proof secondary housing 210 has a circular structure. A first cover plate 240 is fixedly installed on the rear outer wall of the explosion-proof main housing 200 by bolts, and a second cover plate 250 is fixedly installed on the front outer wall of the explosion-proof secondary housing 210 by bolts. The drive assembly includes an explosion-proof motor 300, the output end of which is connected to a multi-turn reducer 310, and an explosion-proof brake 320 is provided on the outer wall of the output shaft of the multi-turn reducer 310.

[0018] The specific application scenario of this embodiment is as follows: The explosion-proof main housing 200 serves as the main support structure, and its rectangular structure cooperates with the front circular explosion-proof secondary housing 210 to provide installation space for internal components. The first cover plate 240 at the rear end and the second cover plate 250 at the front end of the explosion-proof secondary housing 210 are fixed by bolts to form a closed chamber to protect the internal components. In the drive assembly, the explosion-proof motor 300 outputs power, which is transmitted through the multi-turn reducer 310 to drive the output shaft. The explosion-proof brake 320 can realize braking control on the outer wall of the output shaft. The overall structure is suitable for industrial valve control scenarios that require basic explosion protection and multi-turn transmission.

[0019] Example 2: Figure 1 , Figure 4 and Figure 5 The explosion-proof main housing 200 and explosion-proof secondary housing 210 are made of cast aluminum alloy. A first explosion-proof sealing ring 241 is fixedly installed at the connection between the explosion-proof main housing 200 and the first cover plate 240. A groove 211 is opened on the inner wall of the front end of the explosion-proof secondary housing 210. A second explosion-proof sealing ring 251 is fixedly installed between the explosion-proof secondary housing 210 and the second cover plate 250. The explosion-proof secondary housing 210 is installed on the top of the base 100. Anti-slip pads 110 are fixedly installed at the four corners of the bottom of the base 100. The first explosion-proof sealing ring 241 and the second explosion-proof sealing ring 251 are made of oil-resistant nitrile rubber with a trapezoidal cross section. An explosion-proof gland 220 is fixedly installed on the side wall of the explosion-proof main housing 200 to seal the cable insertion part.

[0020] The specific application scenario of this embodiment is as follows: The explosion-proof main housing 200 and explosion-proof secondary housing 210, made of cast aluminum alloy, have good explosion-proof performance and thermal conductivity. The first explosion-proof sealing ring 241 and the second explosion-proof sealing ring 251 are made of oil-resistant nitrile rubber with a trapezoidal cross section, which respectively seals the connection between the explosion-proof main housing 200 and the first cover plate 240, and the explosion-proof secondary housing 210 and the second cover plate 250, preventing the intrusion of flammable and explosive gases. The groove 211 on the inner wall of the front end of the explosion-proof secondary housing 210 can help position the sealing element. The explosion-proof gland 220 seals the cable insertion part. The base 100 and the anti-slip pad 110 enhance the overall stability. It is suitable for flammable and explosive places where the stability of the equipment is required, such as chemical workshops.

[0021] Example 3: Figure 3 The explosion-proof motor 300 is an explosion-proof three-phase asynchronous motor. The explosion-proof motor 300 is installed inside the explosion-proof main housing 200. The explosion-proof brake 320 is used to achieve emergency braking when the power is off. The multi-turn reducer 310 is made of high-strength alloy steel. The surface of the gears in the multi-turn reducer 310 is coated with a nickel-phosphorus alloy wear-resistant coating. The output shaft of the multi-turn reducer 310 passes through the inner wall of the second cover plate 250 and is installed in conjunction with the explosion-proof bearing.

[0022] The specific application scenario of this embodiment is as follows: The explosion-proof motor 300 of the explosion-proof three-phase asynchronous motor is installed inside the explosion-proof main housing 200 to ensure that no sparks igniting the external medium are generated during operation. The multi-turn reducer 310 is made of high-strength alloy steel, and the nickel-phosphorus alloy wear-resistant coating on the surface of the gear reduces frictional sparks and wear. Its output shaft passes through the second cover plate 250 and cooperates with the explosion-proof bearing to ensure the stability and sealing of the multi-turn transmission. The explosion-proof brake 320 provides emergency braking in the event of a power failure to prevent the output shaft from rotating unexpectedly. It is suitable for valve systems that require high-precision multi-turn control and have high safety requirements.

[0023] Example 4: Figure 3 and Figure 4 Heat dissipation fins 230 are evenly fixedly installed on both outer walls of the explosion-proof main housing 200. The heat-generating parts of the explosion-proof motor 300, multi-turn reducer 310, and explosion-proof brake 320 are connected to the explosion-proof main housing 200 for heat dissipation. The specific application scenario of this embodiment is as follows: The heat dissipation fins 230 on both sides of the explosion-proof main housing 200 increase the heat dissipation area and accelerate heat dissipation. The heat-generating parts of the explosion-proof motor 300, multi-turn reducer 310 and explosion-proof brake 320 are connected to the explosion-proof main housing 200, which transfers the heat generated during operation to the housing and then dissipates it to the outside through the heat dissipation fins 230. This avoids the internal components from being affected by high temperature or causing safety hazards. It is suitable for explosion-proof environments that operate under high load for a long time, such as valve control of natural gas transmission pipelines.

[0024] Example 5: Figure 2 and Figure 5 A controller 400 is fixedly installed on the top outer wall of the explosion-proof main housing 200. A display screen 410 and a limit switch 420 are fixedly installed on the outer wall of the controller 400. An intrinsically safe circuit board is provided inside the controller 400. The controller 400 is electrically connected to the explosion-proof motor 300, the multi-turn reducer 310, and the explosion-proof brake 320. The controller 400 is used to monitor the output torque and realize overload protection.

[0025] The specific application scenario of this embodiment is as follows: The controller 400 on the top of the explosion-proof main housing 200 is electrically connected to the explosion-proof motor 300, the multi-turn reducer 310, and the explosion-proof brake 320. The operating parameters are displayed on the display screen 410, the limit switch 420 controls the multi-turn stroke range, the controller 400 monitors the output torque, and the controller provides protection when an overload occurs to ensure the safe operation of the equipment. This embodiment is suitable for multi-turn electric actuator scenarios that require real-time monitoring and intelligent control, such as valve regulation in petrochemical production lines.

[0026] The working principle of this utility model is as follows: For those skilled in the art, the explosion-proof main housing 200 and the front explosion-proof secondary housing 210 constitute the main support structure. The rear first cover plate 240 and the front second cover plate 250 of the explosion-proof secondary housing 210 are fixed with bolts to form a closed chamber. This, combined with the first explosion-proof sealing ring 241 and the second explosion-proof sealing ring 251, achieves sealing. The explosion-proof gland 220 seals the cable entry point, jointly preventing the intrusion of flammable and explosive gases, thus providing basic explosion protection. In the drive assembly, the explosion-proof motor 300 outputs power, which is transmitted through the multi-turn reducer 310 to drive the output shaft. During rotary operation, the explosion-proof brake 320 can provide emergency braking in the event of a power outage to prevent accidental rotation of the output shaft. The heat dissipation fins 230 on both sides of the explosion-proof main housing 200, together with the connection between the heat-generating parts of the explosion-proof motor 300, multi-turn reducer 310, and explosion-proof brake 320 and the explosion-proof main housing 200, transfer and dissipate heat to avoid the effects of high temperature. The controller 400 on the top is electrically connected to each component, displays parameters through the display screen 410, controls the stroke through the limit switch 420, and monitors the output torque to achieve overload protection, ensuring that the equipment can safely and stably complete multi-turn control operations in flammable and explosive environments.

[0027] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A multi-turn electric actuator with explosion-proof function, characterized in that, include: An explosion-proof main housing (200) is provided with an explosion-proof secondary housing (210) on the front outer wall of the explosion-proof main housing (200). The explosion-proof main housing (200) has a rectangular structure, and the explosion-proof secondary housing (210) has a circular structure. A first cover plate (240) is fixedly installed on the rear outer wall of the explosion-proof main housing (200) by bolts, and a second cover plate (250) is fixedly installed on the front outer wall of the explosion-proof secondary housing (210) by bolts. The drive assembly includes an explosion-proof motor (300), the output end of which is connected to a multi-turn reducer (310), and the outer wall of the output shaft of the multi-turn reducer (310) is provided with an explosion-proof brake (320).

2. The multi-turn electric actuator with explosion-proof function according to claim 1, characterized in that, The explosion-proof main housing (200) and explosion-proof secondary housing (210) are made of cast aluminum alloy. The first explosion-proof sealing ring (241) is fixedly installed at the connection between the explosion-proof main housing (200) and the first cover plate (240). The inner wall of the front end of the explosion-proof secondary housing (210) is provided with a groove (211).

3. A multi-turn electric actuator with explosion-proof function according to claim 2, characterized in that, The explosion-proof sub-shell (210) and the second cover plate (250) are fixedly installed with a second explosion-proof sealing ring (251). The explosion-proof sub-shell (210) is installed on the top of the base (100). Anti-slip pads (110) are fixedly installed at the four corners of the bottom of the base (100).

4. A multi-turn electric actuator with explosion-proof function according to claim 3, characterized in that, The first explosion-proof sealing ring (241) and the second explosion-proof sealing ring (251) are made of oil-resistant nitrile rubber with a trapezoidal cross-section. The explosion-proof main housing (200) is fixedly installed on the side wall with an explosion-proof gland (220) to seal the cable insertion part.

5. A multi-turn electric actuator with explosion-proof function according to claim 1, characterized in that, The explosion-proof motor (300) is an explosion-proof three-phase asynchronous motor. The explosion-proof motor (300) is installed inside the explosion-proof main housing (200). The explosion-proof brake (320) is used to achieve emergency braking when the power is off.

6. A multi-turn electric actuator with explosion-proof function according to claim 5, characterized in that, The multi-turn reducer (310) is made of high-strength alloy steel. The gear surface in the multi-turn reducer (310) is coated with a nickel-phosphorus alloy wear-resistant coating. The output shaft of the multi-turn reducer (310) passes through the inner wall of the second cover plate (250) and is installed in conjunction with the explosion-proof bearing.

7. A multi-turn electric actuator with explosion-proof function according to claim 1, characterized in that, Heat dissipation fins (230) are uniformly fixedly installed on both outer walls of the explosion-proof main housing (200). The heat-generating parts of the explosion-proof motor (300), multi-turn reducer (310) and explosion-proof brake (320) are connected to the explosion-proof main housing (200) for heat dissipation.

8. A multi-turn electric actuator with explosion-proof function according to claim 1, characterized in that, A controller (400) is fixedly installed on the top outer wall of the explosion-proof main housing (200). A display screen (410) and a limit switch (420) are fixedly installed on the outer wall of the controller (400). An intrinsically safe circuit board is provided inside the controller (400). The controller (400) is electrically connected to the explosion-proof motor (300), the multi-turn reducer (310), and the explosion-proof brake (320). The controller (400) is used to monitor the output torque and realize overload protection.

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