Split type explosion-proof robot control cabinet based on external air supply

Abstract

This invention provides a split-type explosion-proof robot control cabinet based on an external air source, relating to the fields of industrial automation and explosion-proof safety technology. It includes an explosion-proof cabinet and a positive-pressure cabinet, connected via a docking interface. An external air source is input into the positive-pressure cabinet to form a positive-pressure airflow, dissipating heat from the cabinet and maintaining an internal pressure higher than the external environment. The explosion-proof cabinet is a sealed cavity. After the positive-pressure airflow exits from the positive-pressure cabinet, it flows over the outer surface of the explosion-proof cabinet, further dissipating heat. This invention achieves dual explosion-proof protection by independently designing and collaboratively operating the explosion-proof cabinet and the positive-pressure cabinet. The positive-pressure cabinet prevents the infiltration of external flammable gases through dynamic pressure control. The two modules achieve physical isolation and functional linkage through a quick-connect interface, balancing explosion-proof performance with modular maintenance requirements.

Description

Technical Field

[0001] This invention belongs to the field of industrial automation and explosion-proof safety technology, and in particular relates to a split-type explosion-proof robot control cabinet based on external air supply. Background Technology

[0002] In the field of industrial automation, explosion-proof robots are widely used in flammable and explosive environments such as petroleum, chemical, and coal mines. Traditional explosion-proof control cabinets can be mainly divided into the following two categories based on their operating principles and application scenarios:

[0003] Explosion-proof type: Utilizes a thickened metal casing (such as cast aluminum or stainless steel) to withstand internal explosion pressure (typically ≥1.5MPa), preventing the leakage of flames and high-temperature gases. Traditional explosion-proof cabinets rely on natural heat dissipation or simple forced heat dissipation, which can easily lead to overheating of internal components in high-temperature environments, affecting stability.

[0004] Positive pressure type: Using compressed air / nitrogen (pressure ≥ 50Pa) to prevent the infiltration of explosive gases, positive pressure explosion-proof cabinets are increasingly widely used in Zone 1 (locations where an explosive gas atmosphere may occur during normal operation) and Zone 2 (locations where an explosive gas atmosphere is unlikely to occur during normal operation; if it does occur, it is occasional and only for a short time) hazardous locations, especially for various power control systems and automatic control system cabinets located in explosive hazardous areas. The presence of positive pressure within the cabinet effectively overcomes the adverse effects of harsh environmental conditions on internal components and instruments, thus providing the entire system with explosion-proof, dustproof, moisture-proof, and corrosion-proof properties, greatly improving the cabinet's environmental adaptability. Positive pressure control modules require explosion-proof treatment. When integrated with the positive pressure cabinet, the integrated design requires a complete shutdown for maintenance, and complex wiring increases maintenance difficulty. The air supply and heat dissipation paths are coupled, requiring interruption of the air supply for disassembly and assembly, resulting in low maintenance efficiency. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide a split-type explosion-proof robot control cabinet based on external air supply, which realizes effective heat dissipation and explosion-proof safety of the control cabinet.

[0006] This invention provides a split-type explosion-proof robot control cabinet based on an external air source supply, including an explosion-proof cabinet and a positive pressure cabinet, wherein the positive pressure cabinet and the explosion-proof cabinet are connected through a docking interface;

[0007] An external air source is input into the positive pressure cabinet to form a positive pressure airflow, which dissipates heat from the positive pressure cabinet and maintains the air pressure inside the positive pressure cabinet higher than that of the external environment;

[0008] The explosion-proof cabinet is a sealed cavity; after the positive pressure airflow is discharged from the positive pressure cabinet, it flows over the outer surface of the explosion-proof cabinet to dissipate heat from the explosion-proof cabinet.

[0009] Furthermore, the positive pressure cabinet includes a positive pressure maintenance system, a pressure sensor, and a flow sensor;

[0010] The pressure sensor and the flow sensor monitor the air pressure inside the positive pressure cabinet and the flow rate of the external air source, respectively; the positive pressure maintenance system is used to adjust the air pressure inside the positive pressure cabinet.

[0011] Furthermore, the explosion-proof enclosure includes an explosion-proof enclosure and a positive pressure system controller;

[0012] The positive pressure system controller is connected to the pressure sensor and the flow sensor through the docking interface. Based on the pressure value of the pressure sensor, it controls the positive pressure maintenance system to maintain the air pressure inside the cabinet. When an abnormal pressure difference or abnormal flow is detected, an alarm is triggered and the power supply to the positive pressure cabinet is cut off.

[0013] Furthermore, the explosion-proof enclosure achieves mechanical sealing through the explosion-proof flange surface.

[0014] Furthermore, the docking interface uses explosion-proof cables and explosion-proof glands.

[0015] Furthermore, both the positive pressure cabinet and the explosion-proof cabinet are rectangular in shape, and the explosion-proof cabinet has a flange explosion-proof surface installed on the side away from the positive pressure cabinet; explosion-proof glands are installed on the top of the explosion-proof cabinet and the side of the positive pressure cabinet respectively.

[0016] Furthermore, the explosion-proof enclosure has heat dissipation fins, and the gas discharged from the positive pressure cabinet is transported to the surface of the heat dissipation fins through a flow guide, and the direction of the heat dissipation fins is the same as the direction of the airflow discharged from the positive pressure cabinet.

[0017] Furthermore, the positive pressure cabinet is equipped with multi-stage filtered air inlets for dust removal and dehumidification of external air sources.

[0018] Beneficial effects:

[0019] Dual-module collaborative explosion-proof mechanism: By combining active protection (positive pressure explosion-proof) and passive protection (flameproof enclosure) technologies, a multi-layered explosion-proof protection system is formed. The positive pressure system serves as the first line of defense, eliminating the conditions for the formation of an explosive atmosphere; the flameproof structure serves as the second line of defense, suppressing the consequences of an explosion in extreme situations.

[0020] This invention adopts a modular design, uses explosion-proof cables, and connects the explosion-proof cabinet and the positive pressure cabinet at both ends with explosion-proof glands. If any module fails, it can be quickly replaced and maintained.

[0021] An external air source is introduced into the positive pressure cabinet after being regulated by a pressure reducing valve, which can maintain the air pressure inside the cabinet higher than that of the external environment;

[0022] After the positive pressure cabinet is cooled by positive pressure airflow, it is directionally delivered to the surface of the heat dissipation fins of the explosion-proof cabinet through the guide hood to improve the heat dissipation efficiency of thermal bridges.

[0023] In addition, after disconnecting the quick-release interface, the positive pressure cabinet or explosion-proof cabinet can be inspected and maintained separately. The quick-release interface has a built-in foolproof design to avoid misconnection. Attached Figure Description

[0024] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] Figure 1 This is a front view of Embodiment 1 of the present invention;

[0026] Figure 2 This is a perspective view of Embodiment 1 of the present invention;

[0027] Figure 3 This is a perspective view of Embodiment 1 of the present invention;

[0028] Figure 4 This is a front view of the explosion-proof cabinet according to Embodiment 1 of the present invention;

[0029] Figure 5 This is a cross-sectional view of the docking interface in Embodiment 1 of the present invention;

[0030] Figure 6 This is a schematic diagram of the positive pressure maintenance system of Embodiment 1 of the present invention;

[0031] Figure 7 This is a schematic diagram of the explosion-proof pressure and flow sensor of Embodiment 1 of the present invention;

[0032] Figure 8 This is a control flowchart of the gas management system in Embodiment 2 of the present invention. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The principles and features of the present invention are described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] In the existing technology, explosion-proof cabinets generally use high-strength stainless steel shells of Exd standard, and the internal circuits are sealed through explosion-proof joint surfaces to confine possible explosions within the sealed shell and prevent the transmission of explosion energy to the external environment, thereby avoiding secondary explosions in the surrounding hazardous environment such as flammable gases and dust.

[0035] Positive pressure cabinets are generally responsible for continuously supplying clean, dry air into the cabinet to maintain a positive pressure environment in accordance with Exp standards and prevent the intrusion of external explosive gases.

[0036] This invention discloses a split-type explosion-proof robot control cabinet based on an external gas supply. By designing the explosion-proof cabinet and the positive pressure cabinet independently yet allowing them to work collaboratively, dual explosion-proof protection is achieved. The explosion-proof cabinet uses a flange flameproof surface to suppress the propagation of internal explosions; the positive pressure cabinet prevents the infiltration of external flammable gases through dynamic pressure control. The two modules are physically isolated and functionally linked through a quick-connect interface. This design balances explosion-proof performance with modular maintenance requirements, making it suitable for high-risk scenarios such as petroleum and chemical industries.

[0037] Example 1

[0038] like Figures 1-7 As shown, this embodiment discloses a split-type explosion-proof robot control cabinet, including: an explosion-proof cabinet 100, consisting of an explosion-proof shell 101, internal electrical components 102, and a positive pressure system controller 103, the explosion-proof shell being mechanically sealed by a flange explosion-proof surface 104; a positive pressure cabinet 200, integrating a positive pressure maintenance system 201, an explosion-proof pressure sensor 202, and an explosion-proof flow sensor 203; and a module-to-module interface 300, including an explosion-proof cable 301 and explosion-proof glands 302 at both ends, realizing physical isolation and functional coordination between the explosion-proof cabinet and the positive pressure cabinet.

[0039] like Figure 4 As shown, the explosion-proof cabinet 100 and the positive pressure cabinet 200 adopt an independent cavity design and are connected by an inter-module interface 300. The inter-module interface 300 includes an explosion-proof cable 301 and explosion-proof glands 302 at both ends.

[0040] like Figure 5 As shown, the quick-connect interface 300 between each module is equipped with an explosion-proof cable 301 and explosion-proof glands 302 at both ends, realizing physical isolation and functional coordination between the explosion-proof cabinet and the positive pressure cabinet. The explosion-proof cable 301, with explosion-proof glands 302 at both ends, connects the explosion-proof cabinet 100 and the positive pressure cabinet 200, allowing for quick replacement and maintenance in case of failure of any module.

[0041] like Figure 6 and Figure 7 As shown, the positive pressure maintenance system 201 includes an explosion-proof pressure sensor 202 and an explosion-proof flow sensor 203. The positive pressure system controller 103 monitors the pressure value inside the cabinet in real time and dynamically adjusts the air supply to maintain a positive pressure value ≥50Pa. When an abnormal pressure difference or abnormal flow is detected, the positive pressure system controller 103 is triggered to alarm and the power supply to the positive pressure cabinet 200 is cut off.

[0042] This embodiment employs a dual-module collaborative explosion-proof mechanism, combining active protection positive pressure explosion-proof and passive protection flameproof enclosure technology to form a multi-layered explosion-proof protection system. The positive pressure system serves as the first line of defense, eliminating the conditions for the formation of an explosive atmosphere; the flameproof structure serves as the second line of defense, suppressing the consequences of an explosion in extreme circumstances.

[0043] Example 2

[0044] This embodiment includes an explosion-proof cabinet 100 and a positive pressure cabinet 200. The positive pressure cabinet 200 is connected to the explosion-proof cabinet 100 via a docking interface 300. An external air source is input into the positive pressure cabinet 200 to form a positive pressure airflow, which dissipates heat from the positive pressure cabinet 200 and maintains the air pressure inside the positive pressure cabinet 200 higher than that of the external environment. The explosion-proof cabinet 100 is a sealed cavity. After the positive pressure airflow is discharged from the positive pressure cabinet 200, it flows over the outer surface of the explosion-proof cabinet 100 to dissipate heat from the explosion-proof cabinet 100.

[0045] The positive pressure cabinet 200 includes a positive pressure maintenance system 201, a pressure sensor 202, and a flow sensor 203; the pressure sensor 202 and the flow sensor 203 monitor the air pressure inside the positive pressure cabinet 200 and the flow rate of the external air source, respectively; the positive pressure maintenance system 201 is used to adjust the air pressure inside the positive pressure cabinet 200.

[0046] The explosion-proof cabinet 100 includes an explosion-proof enclosure 101 and a positive pressure system controller 103. The positive pressure system controller 103 is connected to the pressure sensor 202 and the flow sensor 203 through the docking interface 300. Based on the pressure value of the pressure sensor 202, it controls the positive pressure maintenance system 201 to maintain the air pressure inside the cabinet. When an abnormal pressure difference or abnormal flow is detected, an alarm is triggered and the power supply to the positive pressure cabinet 200 is cut off.

[0047] Preferably, the explosion-proof housing 101 achieves mechanical sealing through the flange explosion-proof surface 104.

[0048] Preferably, the docking interface 300 uses an explosion-proof cable 301 and an explosion-proof gland 302.

[0049] Preferably, both the positive pressure cabinet 200 and the explosion-proof cabinet 100 are rectangular in shape, and the explosion-proof flange 104 is installed on the side of the explosion-proof cabinet 100 away from the positive pressure cabinet 200; explosion-proof glands 302 are respectively installed on the top of the explosion-proof cabinet 100 and the side of the positive pressure cabinet 200.

[0050] In this embodiment, the positive pressure cabinet achieves spark-free forced heat dissipation through an external air source, and the explosion-proof cabinet adopts a sealed cavity and thermal bridge heat conduction design. The two cabinets are connected through a quick-release electrical interface. The ventilation exhaust port of the positive pressure cabinet provides a heat dissipation source for the explosion-proof cabinet, solving the problems of poor heat dissipation safety and inconvenient maintenance in traditional solutions.

[0051] This embodiment includes a positive pressure cabinet and an explosion-proof cabinet connected by a quick-release interface. The positive pressure cabinet relies on an external air source to form spark-free forced heat dissipation, while the explosion-proof cabinet dissipates heat in conjunction with the exhaust of the positive pressure cabinet through a thermal bridge heat conduction structure.

[0052] In this embodiment, the positive pressure cabinet is equipped with a multi-stage filtered air inlet at the rear. External air enters the cabinet after dust removal and dehumidification, forming a positive pressure environment. The airflow passes through the air duct inside the cabinet to force heat dissipation on the electronic components, and then exits through the explosion-proof exhaust port on the side. The exhaust port is connected to the heat dissipation channel of the explosion-proof cabinet, and the residual airflow provides auxiliary heat dissipation for the explosion-proof cabinet.

[0053] This embodiment employs a safety redundancy design. The positive pressure cabinet is equipped with a pressure sensor and solenoid valve linkage system, automatically cutting off power and triggering an alarm when the pressure is insufficient. The explosion-proof cabinet cavity uses a stainless steel shell to withstand internal explosion pressure. The gas management and control logic of this embodiment is as follows: Figure 8 As shown.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A split-type explosion-proof robot control cabinet based on an external air source supply, characterized in that, It includes an explosion-proof cabinet (100) and a positive pressure cabinet (200), wherein the positive pressure cabinet (200) is connected to the explosion-proof cabinet (100) via a docking interface (300); An external air source is input into the positive pressure cabinet (200) to form a positive pressure airflow, which dissipates heat from the positive pressure cabinet (200) and maintains the air pressure inside the positive pressure cabinet (200) higher than that of the external environment; The positive pressure cabinet (200) includes a positive pressure maintenance system (201), a pressure sensor (202), and a flow sensor (203). The pressure sensor (202) and the flow sensor (203) monitor the air pressure inside the positive pressure cabinet (200) and the flow rate of the external air source, respectively; the positive pressure maintenance system (201) is used to adjust the air pressure inside the positive pressure cabinet (200); The explosion-proof cabinet (100) includes an explosion-proof enclosure (101) and a positive pressure system controller (103). The positive pressure system controller (103) is connected to the pressure sensor (202) and the flow sensor (203) through the docking interface (300). Based on the pressure value of the pressure sensor (202), it controls the positive pressure maintenance system (201) to maintain the air pressure inside the cabinet. When an abnormal pressure difference or abnormal flow is detected, an alarm is triggered and the power supply to the positive pressure cabinet (200) is cut off. The explosion-proof enclosure (101) achieves mechanical sealing through the explosion-proof flange surface (104); The docking interface (300) uses an explosion-proof cable (301) and an explosion-proof gland (302). Both the positive pressure cabinet (200) and the explosion-proof cabinet (100) are rectangular in shape. The explosion-proof flange (104) is installed on the side of the explosion-proof cabinet (100) away from the positive pressure cabinet (200). Explosion-proof glands (302) are installed on the top of the explosion-proof cabinet (100) and the side of the positive pressure cabinet (200). The explosion-proof cabinet (100) is a sealed cavity, and the explosion-proof outer shell (101) has heat dissipation fins; after the positive pressure airflow is discharged from the positive pressure cabinet (200), it is transported to the surface of the heat dissipation fins through the flow guide to dissipate heat from the explosion-proof cabinet (100); the direction of the heat dissipation fins is the same as the direction of the airflow discharged by the positive pressure airflow. The positive pressure cabinet (200) and the explosion-proof cabinet (100) are physically isolated, and work together through the docking interface (300).

2. The control cabinet according to claim 1, characterized in that, The positive pressure cabinet (200) is equipped with a multi-stage filter air inlet for dust removal and dehumidification of external air sources.

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