Modular switching cabinet for redundant power supply in chemical production DCS

Abstract

This utility model discloses a modular switching cabinet for redundant power supply of DCS in chemical production, relating to the field of cabinet technology. It includes: a cabinet; an air outlet located on one side of the cabinet; an air inlet located on the opposite side of the cabinet; a first temperature sensor installed on the air outlet's outlet path to detect the temperature of the exhaust air; a second temperature sensor installed on the air inlet's inlet path to detect the temperature of the incoming air; a cooling fan located at the air outlet; and a control module located inside the cabinet, electrically connected to the first temperature sensor, the second temperature sensor, and the cooling fan. This utility model provides a second temperature sensor and a first temperature sensor at the air inlet and outlet respectively, enabling real-time monitoring of the air inlet / outlet temperature difference, accurately reflecting heat changes within the cabinet, and providing reliable data support for the control module.

Description

Technical Field

[0001] This utility model relates to the field of cabinet technology, specifically a modular switching cabinet for redundant power supply of DCS in chemical production. Background Technology

[0002] In modern chemical production processes, the Distributed Control System (DCS) serves as the core automation control hub, ensuring the safe and efficient operation of chemical plants through real-time monitoring and precise regulation of the production process. The redundant power supply modules of the DCS system act as "stabilizers" for power supply, and the reliability of their operating environment directly affects the stability and continuity of the entire control system. In actual operation, the power supply modules generate a large amount of heat due to continuous operation. If heat cannot be dissipated effectively and in a timely manner, the module temperature will become too high, leading to accelerated aging and performance degradation of electronic components, and even malfunctions. In severe cases, this can cause a power outage in the DCS system, resulting in chemical production safety accidents or significant economic losses.

[0003] Traditional power supply cabinet cooling methods mostly rely on natural convection or fixed-speed fans. Natural convection is inefficient and cannot meet the cooling requirements of high-power power supply modules; while fixed-speed fans can provide some forced convection, they cannot dynamically adjust their speed according to the real-time temperature inside the cabinet, resulting in energy waste, high noise, and uneven cooling, which can easily lead to localized overheating. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a modular switching cabinet for redundant power supply of DCS in chemical production.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] Modular switching cabinets for redundant power supply in chemical production DCS include:

[0007] Server rack;

[0008] The air vent is located on one side of the server rack;

[0009] The air inlet is located on the opposite side of the cabinet from the side where the air outlet is located;

[0010] The first temperature sensor is installed on the air outlet path to detect the temperature of the exhaust air.

[0011] The second temperature sensor is installed on the air intake path of the air inlet to detect the temperature of the incoming air;

[0012] Cooling fan, located at the air outlet;

[0013] The control module is located inside the cabinet and is electrically connected to the first temperature sensor, the second temperature sensor, and the cooling fan.

[0014] The control module is configured to: calculate the temperature difference between the temperature detected by the first temperature sensor and the temperature detected by the second temperature sensor; when the temperature difference is less than or equal to a first set threshold, control the cooling fan to stop or reduce its speed; when the temperature difference is greater than the first set threshold, control the cooling fan to start or increase its speed.

[0015] Preferably, the control module is configured with multiple temperature threshold ranges, including a first set threshold and at least one second set threshold higher than the first set threshold; when the temperature difference is greater than the first set threshold and less than or equal to the second set threshold, the cooling fan is controlled to run at a first speed; when the temperature difference is greater than the second set threshold, the cooling fan is controlled to run at a second speed higher than the first speed.

[0016] Preferably, the temperature sensing part of the first temperature sensor extends into the channel of the air outlet, and the temperature sensing part of the second temperature sensor extends into the channel of the air inlet.

[0017] Preferably, the temperature difference is the absolute value of the temperature value detected by the first temperature sensor minus the temperature value detected by the second temperature sensor.

[0018] Preferably, the air outlet is located at the top of one side of the cabinet, and the air inlet is located at the bottom of the other side of the cabinet. The cooling air entering through the bottom air inlet is heated and then rises to be discharged through the air outlet, forming a cooling circulation air path.

[0019] Preferably, the cabinet is equipped with a rail mounting bracket for installing a power switching module; the power switching module includes at least two redundant power input lines and at least one power output line.

[0020] Preferably, two cabinets 1 are installed, and both are connected to the power supply line. The power switching module inside each cabinet is electrically connected to the control module 7. When the control module 7 detects that the temperature inside the corresponding cabinet 1 exceeds the preset value, the control module 7 controls the power supply line inside this cabinet 1 to be disconnected, and controls the power supply inside the other cabinet 1 to be connected to the power supply line, thereby completing the power supply line switching.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. Combination of natural and forced convection: Cold air is drawn in from the bottom air inlet and hot air is exhausted from the top air outlet. Natural convection reduces energy consumption; cooling fans accelerate airflow and forced convection enhances heat dissipation under extreme conditions, ensuring stable temperature inside the cabinet.

[0023] 2. Active temperature control: The cooling fan uses pulse width modulation technology to dynamically adjust the speed and dissipate heat as needed: when the temperature is high, the speed is increased to cool down quickly, and when the temperature is low, the speed is reduced to reduce energy consumption, thus balancing heat dissipation efficiency and energy consumption.

[0024] 3. Dual temperature sensors for accurate detection: A second temperature sensor and a first temperature sensor are respectively installed at the air inlet and air outlet to monitor the temperature difference between the inlet and outlet in real time, accurately reflecting the heat changes inside the cabinet and providing reliable data support for the control module. Attached Figure Description

[0025] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0026] Figure 1 A three-dimensional structural schematic diagram of the modular switching cabinet for redundant power supply of DCS in chemical production according to this utility model;

[0027] Figure 2 A second-view three-dimensional structural diagram of the modular switching cabinet for redundant power supply of DCS in chemical production according to this utility model.

[0028] Figure 3 A partial structural schematic diagram of the modular switching cabinet for redundant power supply of DCS in chemical production according to this utility model;

[0029] Figure 4 Circuit connection diagram of the modular switching cabinet for redundant power supply of DCS in chemical production according to this utility model;

[0030] Figure 5 The control logic diagram of the modular switching cabinet for redundant power supply of DCS in chemical production according to this utility model.

[0031] The diagram is labeled as follows: 1. Cabinet; 2. Air outlet; 3. Air inlet; 4. First temperature sensor; 5. Second temperature sensor; 6. Cooling fan; 7. Control module. Detailed Implementation

[0032] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0033] Example

[0034] like Figure 1-5As shown, the modular switching cabinet for redundant power supply of DCS in chemical production includes:

[0035] Rack 1: Serving as the main frame of the entire equipment, it provides installation support and protection for internal components. Rack 1 is equipped with rail mounting brackets for installing power switching modules, facilitating the installation and removal of these modules and improving the ease of equipment maintenance.

[0036] Air outlet 2: Located on the top side of cabinet 1, it is used to exhaust hot air from inside the cabinet. A cooling fan 6 is installed at air outlet 2 to accelerate the exhaust of hot air and improve heat dissipation efficiency.

[0037] Air inlet 3: Located on the bottom of the opposite side of the cabinet 1, opposite to the side where air outlet 2 is located. Cool air enters the cabinet from the bottom air inlet 3, and after absorbing heat from inside the cabinet and becoming warm, it is discharged from the top air outlet 2 due to the principle that hot air rises, thus forming a heat dissipation circulation air path and achieving efficient heat dissipation by combining natural convection and forced convection.

[0038] First temperature sensor 4: Installed on the air outlet path of air outlet 2, its temperature sensing part extends into the channel of air outlet 2, used to accurately detect the temperature of the exhaust air.

[0039] Second temperature sensor 5: Installed on the air intake path of air inlet 3, with the temperature sensing part extending into the channel of air inlet 3, used to accurately detect the temperature of the incoming air.

[0040] Cooling fan 6: Located at air outlet 2, it effectively removes heat from the cabinet by operating at different speeds (through pulse width modulation, which is existing technology).

[0041] Control module 7: Located inside cabinet 1, it is electrically connected to the first temperature sensor 4, the second temperature sensor 5, and the cooling fan 6. It is the core of the entire intelligent heat dissipation control system and is responsible for receiving temperature sensor data and controlling the operation of the cooling fan.

[0042] Temperature Data Acquisition: During rack operation, the second temperature sensor 5, installed on the air intake path of air inlet 3, uses its temperature-sensing element, which extends into the channel, to detect the temperature of the cold air entering the rack in real time. Simultaneously, the first temperature sensor 4, installed on the air outlet path of air outlet 2, uses its temperature-sensing element, which extends into the outlet channel, to accurately collect the temperature of the hot air exiting the rack. Both temperature sensors continuously transmit the detected temperature data to the control module 7 in the form of electrical signals.

[0043] Data Processing and Decision-Making: As the core of the intelligent heat dissipation control system, control module 7 receives temperature data from the first temperature sensor 4 and the second temperature sensor 5, and then analyzes and processes it. First, it calculates the temperature change value of the air inside the cabinet (i.e., the difference between the exhaust air temperature and the inlet air temperature), and then compares it with a preset temperature threshold. If the temperature difference is within the normal range, it indicates that the cabinet's heat dissipation is good, and the current heat dissipation state should be maintained; if the temperature difference exceeds the upper limit of the preset threshold, it indicates that too much heat has accumulated inside the cabinet, and the heat dissipation capacity needs to be enhanced.

[0044] Heat dissipation execution and regulation: Based on data analysis results, control module 7 controls the operating status of cooling fan 6. When enhanced heat dissipation is needed, control module 7 outputs a pulse signal with a specific duty cycle to increase the speed of cooling fan 6, accelerate the exhaust of hot air, and encourage more cool air to enter the cabinet from air inlet 3, enhancing the forced convection effect and accelerating heat dissipation circulation. As the temperature inside the cabinet decreases, when the temperature difference drops to the lower limit of the preset threshold, control module 7 reduces the speed of cooling fan 6 to reduce energy consumption. Throughout the process, cool air enters from the bottom air inlet 3 of cabinet 1, absorbs the heat generated by the operation of internal components, and heats up. Based on the principle of hot air rising, it is exhausted through the top air outlet 2, combining with the forced convection of cooling fan 6 to form an efficient heat dissipation circulation path, ensuring the stable operation and safety protection of the internal components of the cabinet.

[0045] Modular installation: The cabinet 1 is equipped with a guide rail mounting bracket, which supports the quick installation and removal of power switching modules, improving maintenance convenience and reducing downtime.

[0046] Convection airflow design: The air inlet 3 (bottom) and air outlet 2 (top) are diagonally distributed, forming a natural convection foundation by utilizing the principle of hot air rising. Combined with the forced convection cooling fan 6, an efficient heat dissipation circulation airflow is constructed to avoid local heat accumulation.

[0047] The combination of natural and forced convection: cold air is drawn in from the bottom air inlet 3 and hot air is exhausted from the top air outlet 2. Natural convection reduces energy consumption; cooling fan 6 accelerates airflow and forced convection enhances heat dissipation under extreme conditions, ensuring stable temperature inside the cabinet 1.

[0048] Active temperature control: The cooling fan 6 uses pulse width modulation technology to dynamically adjust the speed and dissipate heat as needed: when the temperature is high, the speed is increased to cool down quickly, and when the temperature is low, the speed is reduced to reduce energy consumption, thus balancing heat dissipation efficiency and energy consumption.

[0049] Dual temperature sensors provide accurate detection: The air inlet 3 and the air outlet 2 are respectively equipped with a second temperature sensor 5 and a first temperature sensor 4 to monitor the temperature difference between the air inlet and outlet in real time, accurately reflect the heat changes in the cabinet 1, and provide reliable data support for the control module 7.

[0050] Automated closed-loop control: The control module 7 automatically adjusts the operating status of the cooling fan 6 based on temperature data, without the need for manual intervention, realizing the intelligent and adaptive operation of the cooling system and improving the reliability and stability of the equipment.

[0051] Protection and maintainability: Cabinet 1 provides physical protection as the main frame, and the modular design makes it easy to replace faulty modules individually, reducing maintenance complexity; Sensors 4 and 5 and cooling fan 6 are reasonably arranged, and the inspection path is clear.

[0052] The modular switching cabinet adopts a standardized design and can be configured with different numbers of power modules according to actual needs, typically 2-4. Each power module operates independently, and redundant power supply is achieved through an intelligent switching control unit.

[0053] The cabinet shell is made of high-strength metal, providing excellent heat dissipation and electromagnetic shielding. The internal structure is divided into a power module area, a control unit area, and a wiring area, with each area isolated to enhance system security.

[0054] The intelligent switching control unit employs an embedded processor and runs a real-time operating system to ensure control accuracy and reliability. The control unit connects to each power module via a communication interface to acquire real-time power status information.

[0055] Two cabinets 1 are installed, and both are connected to the power supply line. The power switching module inside each cabinet is electrically connected to the control module 7. When the control module 7 detects that the temperature inside the corresponding cabinet 1 exceeds the preset value, the control module 7 controls the power supply line inside this cabinet 1 to be disconnected, and controls the power supply inside the other cabinet 1 to be connected to the power supply line, thereby completing the power supply line switching. The power supply status can be selected according to the temperature inside the cabinet 1 to ensure the power supply effect.

[0056] The power condition monitoring system uses high-precision sensors to monitor voltage, current, and temperature in real time. The monitoring data is used not only for switching decisions but also for fault early warning and power supply lifespan prediction.

[0057] The load balancing circuit uses digital control technology to dynamically adjust the output power of each power module according to the actual load conditions, ensuring load balance among the modules.

[0058] The energy storage unit in the fast switching protection circuit uses high-performance capacitors or supercapacitors, which can provide temporary power for hundreds of milliseconds during the switching process, ensuring that the DCS system is not affected.

[0059] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. Modular switch cabinet for redundant power supply of a chemical production DCS, characterized in that include: Server rack (1); Air outlet (2) is located on one side of cabinet (1); The air inlet (3) is located on the other side of the cabinet (1) opposite to the side where the air outlet (2) is located; The first temperature sensor (4) is installed on the air outlet (2) in the air outlet path to detect the temperature of the exhaust air; The second temperature sensor (5) is installed on the air intake path of the air inlet (3) to detect the temperature of the incoming air; A cooling fan (6) is installed at the air outlet (2); The control module (7) is located inside the cabinet (1) and is electrically connected to the first temperature sensor (4), the second temperature sensor (5) and the cooling fan (6); The control module (7) is configured to: calculate the temperature difference between the temperature detected by the first temperature sensor (4) and the temperature detected by the second temperature sensor (5); when the temperature difference is less than or equal to a first set threshold, control the cooling fan (6) to stop or reduce its speed; when the temperature difference is greater than the first set threshold, control the cooling fan (6) to start or increase its speed.

2. The modular switch cabinet for redundant power supply of a chemical process DCS according to claim 1, characterized in that: The control module (7) is configured with multiple temperature threshold ranges, including a first set threshold and at least one second set threshold higher than the first set threshold; when the temperature difference is greater than the first set threshold and less than or equal to the second set threshold, the cooling fan (6) is controlled to run at a first speed; when the temperature difference is greater than the second set threshold, the cooling fan (6) is controlled to run at a second speed higher than the first speed.

3. The modular switch cabinet for redundant power supply of a chemical process DCS according to claim 2, characterized in that: The temperature sensing part of the first temperature sensor (4) extends into the channel of the air outlet (2), and the temperature sensing part of the second temperature sensor (5) extends into the channel of the air inlet (3).

4. The modular switching cabinet for redundant power supply of DCS in chemical production according to claim 3, characterized in that: The temperature difference is the absolute value of the temperature value detected by the first temperature sensor (4) minus the temperature value detected by the second temperature sensor (5).

5. The modular switching cabinet for redundant power supply of DCS in chemical production according to claim 4, characterized in that: The air outlet (2) is located at the top of one side of the cabinet (1), and the air inlet (3) is located at the bottom of the other side of the cabinet (1). The cooling air entering through the bottom air inlet (3) is heated and then discharged through the air outlet (2) to form a cooling circulation air path.

6. The modular switching cabinet for redundant power supply of DCS in chemical production according to claim 5, characterized in that: The cabinet (1) is equipped with a rail mounting bracket for installing a power switching module; the power switching module includes one redundant power input line and at least one power output line.

7. The modular switching cabinet for redundant power supply of DCS in chemical production according to claim 6, characterized in that: Two cabinets (1) are installed and both are connected to the power supply line. The power switching module inside is electrically connected to the control module (7). When the control module (7) detects that the temperature inside the corresponding cabinet (1) exceeds the preset value, the control module (7) controls the power supply line inside this cabinet (1) to be disconnected and controls the power supply inside the other cabinet (1) to be connected to the power supply line, thereby completing the power supply line switching.

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