Electric actuator and immersion alarm system

Abstract

The utility model relates to an electric actuator and an immersion alarm system, and relates to the technical field of electric actuators. The electric actuator comprises an electric actuator body, a wiring terminal box, a liquid detection sensor and an alarm module, the wiring terminal box is connected with the electric actuator body; the liquid detection sensor is fixedly mounted at the bottom of the wiring terminal box; and the liquid detection sensor is connected with the alarm module. According to the electric actuator, the liquid detection sensor is installed at the bottom of the wiring terminal box, the situation that liquid permeates into the wiring terminal box can be found and alarmed in time, and therefore equipment faults and potential safety hazards caused by liquid permeation can be prevented.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electric actuators, in particular, to an electric actuator and a liquid immersion alarm system. BACKGROUND

[0002] The electric actuator is a key device of the automatic control system of a thermal power plant. It receives instructions from the distributed control system, controls the opening and closing and position of the valve, and is crucial to the safe and stable operation of the power plant.

[0003] However, if the terminal box of the electric actuator is infiltrated with liquid, it may cause abnormal operation of the electric actuator. Many electric actuators are responsible for controlling key protection devices of the unit, and if the liquid infiltration problem is not found in time, it may cause the performance of the unit to decline, and in severe cases, it may even cause safety accidents such as equipment damage and unplanned shutdown of the unit, or cause environmental protection indicators such as flue gas emission to exceed the standard. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the present disclosure provides an electric actuator and a liquid immersion alarm system thereof.

[0005] In a first aspect, the present disclosure provides an electric actuator, comprising an electric actuator body, a terminal box, a liquid detection sensor, and an alarm module;

[0006] The terminal box is connected to the electric actuator body;

[0007] The liquid detection sensor is fixedly installed at the bottom of the terminal box;

[0008] The liquid detection sensor is connected to the alarm module.

[0009] Optionally, the liquid detection sensor comprises a plurality of detection points arranged at different heights of the bottom of the terminal box.

[0010] The alarm module is connected to each of the plurality of detection points.

[0011] Optionally, the liquid detection sensor is a waterproof sensor.

[0012] Optionally, a main power supply is further included;

[0013] The main power supply is connected to the electric actuator body, the liquid detection sensor, and the alarm module.

[0014] Optionally, a backup power supply is further included; the backup power supply is connected to the liquid detection sensor and the alarm module.

[0015] Optionally, a self-diagnosis module is further included.

[0016] The self-diagnosis module is connected with the liquid detection sensor and the alarm module.

[0017] Optionally, the liquid detection sensor comprises an output interface.

[0018] The output interface is used for coupling with an external device.

[0019] Optionally, a communication module is further included.

[0020] The output interface of the liquid detection sensor is coupled with the communication module.

[0021] The communication module is used for connecting with the external device.

[0022] Optionally, a signal processing module is further included.

[0023] The output interface of the liquid detection sensor is connected with the signal processing module.

[0024] The signal processing module is connected with the communication module.

[0025] In a second aspect, the disclosure further provides a liquid immersion alarm system of an electric actuator, comprising:

[0026] An external device and the electric actuator as described in any of the first aspect, the external device is connected with the electric actuator.

[0027] The above technical solution, by installing a liquid detection sensor at the bottom of the terminal box and connecting it with an alarm module, can timely find and alarm the situation of liquid seepage into the terminal box, can effectively prevent the equipment failure and safety hazards caused by liquid seepage, so as to improve the reliability and safety of the electric actuator.

[0028] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0030] Figure 1 is a structural diagram of an electric actuator according to an exemplary embodiment;

[0031] Figure 2 is a structural diagram of an electric actuator according to another exemplary embodiment;

[0032] Figure 3 is a scene schematic diagram of an electric actuator according to an exemplary embodiment.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] The electric actuator 100, the electric actuator body 110, the terminal box 120, the liquid detection sensor 130, the alarm module 140, the main power supply 150, the backup power supply 160, the self-diagnosis module 170, the output interface 131 of the liquid detection sensor, the communication module 180, the signal processing module 190, and the external device 200. DETAILED DESCRIPTION

[0035] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0036] The electric actuator is a key device of the power plant automation control system. In a thermal power plant, an operator sends instructions to a DCS (Distributed Control System) through an operator station, and the DCS transmits the instruction signal to the electric actuator. After receiving the signal, the electric actuator adjusts the valve to the specified position, thereby ensuring the safe and stable operation of the power plant.

[0037] However, if the terminal box of the electric actuator is infiltrated with liquid due to environmental or human factors, it may cause abnormal operation of the electric actuator. Many electric actuators are responsible for controlling the key protection devices of the unit, and if the liquid infiltration problem is not discovered in time, it may cause the performance of the unit to decline, and in severe cases, it may even cause safety accidents such as equipment damage, unit unplanned shutdown, etc., or cause environmental protection indicators such as flue gas emission to exceed the standard.

[0038] Figure 1 is a structural diagram of an electric actuator 100 according to an exemplary embodiment, as shown in Figure 1 The electric actuator 100 includes an electric actuator body 110, a terminal box 120, a liquid detection sensor 130, and an alarm module 140; the terminal box 120 is connected with the electric actuator body 110; the liquid detection sensor 130 is fixedly installed at the bottom of the terminal box 120; and the liquid detection sensor 130 is connected with the alarm module 140.

[0039] Here, the electric actuator body 110 refers to the main part of the electric actuator 100, including the motor, the speed reduction mechanism, the output shaft and other core components, for receiving control signals and performing corresponding mechanical actions. The terminal box 120 is a closed box that connects the main power supply and the control signal line, usually installed outside the electric actuator body, for protecting electrical connections and facilitating maintenance.

[0040] The liquid detection sensor 130 refers to a device that can detect the presence of liquid. The liquid detection sensor 130 can be a capacitive, conductivity, photoelectric, or float type liquid level sensor. Through the liquid detection sensor 130, it can be detected in time whether there is liquid seepage in the inside of the terminal block box 120, thereby preventing electrical failure caused by liquid immersion of the terminal block box 120. The sensor can be fixed to the bottom of the terminal block box 120 using bolts, adhesives, or special mounting brackets.

[0041] The alarm module 140 refers to a device that receives signals from the liquid detection sensor 130 and issues an alarm. The alarm module 140 can be an audible and visual alarm, a digital display module, or a wireless signal transmitter. The alarm module 140 can timely notify the operator when liquid is detected, so that measures can be taken. The liquid detection sensor 130 can be connected to the alarm module 140 through wired (such as direct electrical connection) or wireless (such as Bluetooth, Wi-Fi) methods. The alarm module 140 can be installed in the following ways: directly on the body of the electric actuator, integrated in the terminal block, installed on the control panel near the electric actuator, or installed as a separate unit in a location convenient for observation.

[0042] The above technical solution, by installing a liquid detection sensor 130 at the bottom of the terminal block box 120 and connecting it to the alarm module 140, can timely detect and alarm the situation of liquid seepage into the terminal block box 120, effectively prevent equipment failure and safety hazards caused by liquid seepage, and thus improve the reliability and safety of the electric actuator 100.

[0043] In an embodiment, the liquid detection sensor 130 includes a plurality of detection points arranged at different heights on the bottom of the terminal block box 120; and the alarm module 140 is connected to each of the plurality of detection points.

[0044] Here, the plurality of detection points refers to a plurality of sensing points arranged on the bottom of the terminal block box 120 for detecting the presence of liquid. By arranging the plurality of detection points at different heights on the bottom of the terminal block box 120, liquid seepage of different degrees can be detected and single-point failure can be avoided, thereby increasing the reliability of detection. A plurality of independent liquid detection sensors can be used and installed at different heights by a fixing device, or a liquid detection device with multiple detection points can be used.

[0045] The alarm module 140 is connected to each of the plurality of detection points, which can issue different forms of alarms according to the information of different detection points. The alarm module 140 can be connected to the plurality of detection points using a parallel circuit, or the alarm module 140 with multiple channel inputs can be connected to the plurality of detection points.

[0046] The technical scheme above can realize hierarchical detection and alarm of liquid penetration by setting multiple liquid detection points at different heights on the bottom of the terminal box 120 and connecting the liquid detection points with the alarm module 140, thereby effectively preventing damage to the equipment and potential safety hazards caused by liquid penetration.

[0047] In an embodiment, the liquid detection sensor 130 is a waterproof sensor.

[0048] Here, the waterproof sensor refers to a sensor that can normally work in a humid or water environment. The waterproof design of the liquid detection sensor 130 can prevent the sensor from being damaged during liquid detection, thereby ensuring long-term reliable operation. The liquid detection sensor can be packaged with waterproof materials, sealed, or selected to have waterproof properties.

[0049] Figure 2 is a structural diagram of an electric actuator 100 according to another exemplary embodiment. In an embodiment, as shown in Figure 2 , a main power supply 150 is further included; the main power supply 150 is connected with the electric actuator body 110, the liquid detection sensor 130, and the alarm module 140.

[0050] Here, the main power supply 150 refers to a main power supply unit that provides power for the entire electric actuator 100. The main power supply 150 is connected with the electric actuator body 110, the liquid detection sensor 130, and the alarm module 140, which can ensure unified power supply, thereby enabling the electric actuator body 110, the liquid detection sensor 130, and the alarm module 140 to operate simultaneously. The main power supply 150 can be connected to the electric actuator body 110, the liquid detection sensor 130, and the alarm module 140 through the main power supply interface of the terminal box 120.

[0051] For example, Figure 3 is a scene schematic diagram of an electric actuator according to an exemplary embodiment, as shown in Figure 3 , the liquid detection sensor 130 can be connected with the 24V main power supply 150 of the electric actuator through the main power supply interface of the terminal box 120.

[0052] In an embodiment, as shown in Figure 2 , a backup power supply 160 is further included; the backup power supply 160 is connected with the liquid detection sensor 130 and the alarm module 140.

[0053] Here, the backup power supply 160 is a secondary power supply device that provides alternative power to the liquid detection sensor 130 and the alarm module 140 when the main power supply 150 fails. Providing the backup power supply 160 ensures that the liquid detection sensor 130 and the alarm module 140 can still operate normally when the main power supply 150 fails. A battery, a UPS (Uninterruptible Power Supply), or a backup generator can be used as the backup power supply 160. The connection between the backup power supply 160 and the liquid detection sensor 130 and the alarm module 140 can be an automatic transfer switch or a parallel circuit.

[0054] In one embodiment, such as Figure 2 As shown, it also includes a self-diagnosis module 170; the self-diagnosis module 170 is connected to the liquid detection sensor 130 and the alarm module 140.

[0055] Here, the self-diagnostic module 170 can be a dedicated embedded diagnostic chip or microcontroller unit. The self-diagnostic module 170 can periodically check parameters such as the signal output, power supply status, and communication quality of the liquid detection sensor 130 to ensure they are in normal working order. If an abnormality is detected in the liquid detection sensor 130, the self-diagnostic module 170 can trigger an alarm in the alarm module 140.

[0056] In one embodiment, such as Figure 2 As shown, the liquid detection sensor 130 includes an output interface; the output interface is used to couple with an external device 200.

[0057] Here, the output interface 131 of the liquid detection sensor can be an analog signal interface (such as 4-20mA, 0-5V, etc.), a digital signal interface (such as RS-485, Modbus, etc.), a switch output interface (such as relay contacts), or a wireless communication interface (such as Wi-Fi, Bluetooth, ZigBee, etc.). External devices 200 can be data acquisition systems (DCS, PLC, etc.), remote monitoring terminals, handheld diagnostic devices, mobile terminals (smartphones or tablets), cloud platforms, or IoT systems, etc.

[0058] By coupling the output interface 131 of the liquid detection sensor to the external device 200, the data collected by the liquid detection sensor 130 can be transmitted to the external device 200 for analysis and storage.

[0059] For example, such as Figure 3 As shown, when the liquid detection sensor 130 detects liquid at the bottom of the terminal box 120, it can output a passive switching signal to the distributed control system via a signal line. The signal line can be connected to the distributed control system sequentially through the terminal box 120 and the wiring hole.

[0060] In an embodiment, as shown in Figure 2 The output interface 131 of the liquid detection sensor is coupled with the communication module 180; and the communication module 180 is used to connect with the external device 200.

[0061] Here, the output interface of the liquid detection sensor 130 coupled with the communication module 180 can be a serial interface (such as RS-232, RS-485), a parallel interface, a digital communication interface (such as I2C or SPI), an analog signal output (such as 4-20mA or 0-5V), a switch output (such as a relay contact), etc.

[0062] The communication module 180 can be an Ethernet module, a wireless communication module (such as Wi-Fi, ZigBee, or LoRa), an industrial bus module (such as Modbus or Profibus), a cellular network module (such as 4G / 5G), an optical fiber communication module, etc. The connection mode of the communication module 180 with the external device 200 can be wired connection (Ethernet cable, serial line, etc.), wireless connection (Wi-Fi, Bluetooth, ZigBee, etc.), cellular network (4G / 5G network), industrial bus (Modbus, Profibus, etc.), optical fiber communication, etc.

[0063] The communication module 180 can convert the raw data of the liquid detection sensor 130 into data required by the standard communication protocol, so as to realize reliable long-distance transmission with the external device 200.

[0064] In an embodiment, as shown in Figure 2 The signal processing module 190 is connected with the communication module 180.

[0065] Here, the signal processing module 190 can be an analog signal circuit, a DSP (Digital Signal Processor), an MCU (Microcontroller Unit), an FPGA (Field-Programmable Gate Array), an ASIC (Application-Specific Integrated Circuit), etc.

[0066] The output interface of the liquid detection sensor 130 connected with the signal processing module 190 can be an analog voltage output interface (such as 0-5V, 0-10V), a current output interface (such as 4-20mA), a digital interface (such as SPI, I2C), a pulse frequency output interface, a switch output (such as a relay contact) interface, and the like.

[0067] The connection mode of the signal processing module 190 with the communication module 180 can be serial connection (such as UART, RS-232, RS-485), parallel data bus connection, SPI or I2C digital connection, Ethernet connection, and the like.

[0068] The signal processing module 190 can perform signal enhancement, noise filtering, analog-to-digital conversion, and the like on the signal sent by the liquid detection sensor 130, so that the liquid detection data can be reliably transmitted to the external device 200.

[0069] The present disclosure also provides a liquid immersion alarm system of the electric actuator 100, as shown in Figure 2 The liquid immersion alarm system of the electric actuator 100 comprises an external device 200 and any of the electric actuators 100 described above, and the external device 200 is connected with the electric actuator 100.

[0070] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection range of the present disclosure.

[0071] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0072] In addition, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed by the present disclosure.

Claims

1. An electric actuator, characterized in that The electric actuator comprises an electric actuator body (110), a terminal box (120), a liquid detection sensor (130) and an alarm module (140). The terminal box (120) is connected with the electric actuator body (110). The liquid detection sensor (130) is fixedly installed at the bottom of the terminal box (120). The liquid detection sensor (130) is connected with the alarm module (140).

2. The electric actuator according to claim 1, wherein the liquid detection sensor (130) comprises a plurality of detection points arranged at different heights of the bottom of the terminal box (120); and the alarm module (140) is connected with the plurality of detection points. The liquid detection sensor (130) is a waterproof sensor. The electric actuator further comprises a main power supply (150), wherein the main power supply (150) is connected with the electric actuator body (110), the liquid detection sensor (130) and the alarm module (140). The electric actuator further comprises a backup power supply (160), wherein the backup power supply (160) is connected with the liquid detection sensor (130) and the alarm module (140).

3. The electric actuator according to claim 1, characterized in that The electric actuator further comprises a self-diagnosis module (170), wherein the self-diagnosis module (170) is connected with the liquid detection sensor (130) and the alarm module (140).

4. The electric actuator of claim 1, wherein, The liquid detection sensor (130) comprises an output interface. The output interface is used for coupling with an external device (200).

5. The electric actuator according to claim 4, characterized in that The electric actuator further comprises a communication module (180), wherein the output interface (131) of the liquid detection sensor is coupled with the communication module (180); and the communication module (180) is used for connecting with the external device (200).

6. The electric actuator of claim 1, wherein, The electric actuator further comprises a signal processing module (190), wherein the output interface (131) of the liquid detection sensor is connected with the signal processing module (190); and the signal processing module (190) is connected with the communication module (180). The electric actuator comprises an external device (200) and the electric actuator according to any one of claims 1-9, wherein the external device (200) is connected with the electric actuator.

7. An electric actuator according to any one of claims 1-6, c h a r a c t e r i z e d i n that ​ ​ 8. The electric actuator according to claim 7, characterized in that ​ ​ ​ 9. The electric actuator according to claim 8, characterized in that ​ ​ ​ 10. A fluid immersion alarm system for an electric actuator, comprising: ​ ​

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