Marine explosion-proof master control device

Abstract

The utility model relates to a marine explosion-proof master control device, which is connected with an electrical control cabinet and a frequency converter and comprises an explosion-proof master control unit, an increased safety type shell and a mounting seat, the explosion-proof master control unit is mounted in the increased safety type shell, and the increased safety type shell is mounted on a ship through the mounting seat; the explosion-proof master control unit comprises a shell and a flange cover plate, a controller is arranged in the shell, the flange cover plate is installed on the open face of the shell, explosion-proof electrical equipment is installed on the flange cover plate, and the controller is electrically connected with the explosion-proof electrical equipment, the electrical control cabinet and the frequency converter. Compared with the prior art, the explosion-proof master control unit is arranged in the increased safety type shell, so that the explosion-proof master control unit can be protected when the master control unit does not work, the aging of a control element is prevented from being accelerated by ultraviolet rays, and various external impacts are resisted; the size of the whole structure can be adjusted according to needs, functions are expanded, and more control elements and display instruments can be added.

Description

Technical Field

[0001] This utility model relates to a master controller, and more particularly to a marine explosion-proof master control device. Background Technology

[0002] Conventional explosion-proof products on the market are mostly used in land environments, such as coal mines and mines, and industries such as pharmaceuticals, chemicals, petrochemicals, textiles, and military. They are not well adapted to the marine environment where ships are located.

[0003] There are currently few explosion-proof master controllers for chemical tankers and LNG carriers, and the product types are relatively limited, mainly being flameproof types with protection levels reaching Gb and Db levels. However, their internal net volume is small, making them unsuitable for expansion. For equipment that requires multiple control operations and displays parameters such as current, voltage, temperature, speed, and counting, there is insufficient space. Furthermore, existing explosion-proof master control units have insufficient impact resistance, complex manufacturing processes, and long production cycles.

[0004] In summary, the technical problem that needs to be solved is how to design an explosion-proof master controller that is suitable for ships, has a large space, and is highly impact-resistant. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, such as its unsuitability for ships and its small volume, and to provide a marine explosion-proof master control device.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of this utility model, a marine explosion-proof master control device is provided, which is connected to an electrical control cabinet and a frequency converter. The device includes an explosion-proof master control unit, an increased safety housing, and a mounting base. The explosion-proof master control unit is installed inside the increased safety housing, and the increased safety housing is installed on a ship via the mounting base. The explosion-proof master control unit includes a housing and a flange cover plate. A controller is provided inside the housing. The flange cover plate is installed on the open side of the housing. Explosion-proof electrical equipment is installed on the flange cover plate. The controller is electrically connected to the explosion-proof electrical equipment, the electrical control cabinet, and the frequency converter.

[0008] As a preferred technical solution, the explosion-proof master control unit is an explosion-proof master control unit made of 304 stainless steel; the increased safety housing is an increased safety housing made of 304 stainless steel.

[0009] As a preferred technical solution, the explosion-proof master control unit is provided with an epoxy resin insulation board inside, and the epoxy resin insulation board is provided with a terminal block; the explosion-proof master control unit is provided with a mounting plate, which is fixed in the increased safety type housing.

[0010] As a preferred technical solution, the housing and the flange cover are connected by a hinge on one side, and a handle is provided on the outer surface of the flange cover.

[0011] As a preferred technical solution, the housing is provided with an explosion-proof stuffing box, and the cables of the explosion-proof electrical equipment and electrical control cabinet are connected to the controller through the explosion-proof stuffing box.

[0012] As a preferred technical solution, the explosion-proof electrical equipment includes an explosion-proof push-button light, an explosion-proof push-button, an ammeter, and a heater.

[0013] As a preferred technical solution, a non-metallic insulating sealing gasket is installed between the explosion-proof electrical equipment and the flange cover plate.

[0014] As a preferred technical solution, the roughness of the contact surface between the shell and the flange cover is not less than Ra0.8, and the flatness is not more than 0.01mm.

[0015] As a preferred technical solution, the mounting base includes a support column and a mounting panel. The mounting panel is mounted on the support column, the support column is perpendicular to the ground and fixed to the ground, and the angle between the mounting panel and the ground is an acute angle.

[0016] As a preferred technical solution, the support column is provided with a first reinforcing rib between itself and the ground, and with a second reinforcing rib between itself and the mounting panel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) This utility model installs the explosion-proof master control unit in an increased safety housing, which can protect the master control unit when it is not working, prevent ultraviolet rays from accelerating the aging of control components and resist various external impacts; the overall structure can be adjusted in size as needed to expand functions and add more control components and display instruments;

[0019] 2) The explosion-proof master control unit and the increased safety housing of this utility model are made of 304 stainless steel, which not only meets the requirements of the ship's large temperature difference, high salt and high humidity environment, but also ensures the structural strength. At the same time, it eliminates the need for complex processes such as mold making, which greatly reduces the manufacturing cost and shortens the manufacturing cycle. The housing and the flange cover are connected by a hinge on one side, and a handle is provided on the flange cover to facilitate the opening of the flange cover when the explosion-proof master control unit is in use.

[0020] 3) The epoxy resin insulation board of this utility model has excellent insulation performance and resistance to acids, alkalis and organic solvents. The installation of the terminal block is safe and reliable. The cables of the explosion-proof electrical equipment and electrical control cabinet are connected to the controller through the explosion-proof stuffing box. After the cable is installed, the inside of the explosion-proof stuffing box is sealed with a two-component sealing material to ensure complete isolation between the internal and external environments of the control unit. A non-metallic insulating gasket is installed between the explosion-proof electrical equipment and the flange cover plate, which not only provides a sealing function but also increases the creepage distance and electrical clearance.

[0021] 4) This utility model adopts a mounting base, which can be conveniently installed with an increased safety housing. Attached Figure Description

[0022] Figure 1 This is a front view of the explosion-proof master control unit of this utility model;

[0023] Figure 2 This is a top view of the explosion-proof master control unit of this utility model;

[0024] Figure 3 This is a bottom view of the explosion-proof master control unit of this utility model;

[0025] Figure 4 This is a left view of the explosion-proof master control unit of this utility model;

[0026] Figure 5 This is a structural diagram of the epoxy resin insulation board installation inside the explosion-proof master control unit of this utility model;

[0027] Figure 6 This is a front view of the increased safety type housing of this utility model;

[0028] Figure 7 This is a top view of the increased safety type housing of this utility model;

[0029] Figure 8 This is a left view of the increased safety housing of this utility model;

[0030] Figure 9 This is a front view of the mounting base of this utility model;

[0031] Figure 10 This is a schematic diagram of the mounting panel structure of this utility model;

[0032] Figure 11 for Figure 9 Sectional view of AA;

[0033] The numbers in the diagram are as follows:

[0034] 11. Housing; 12. Flange cover; 13. Epoxy resin insulation board; 14. Terminal block; 15. Mounting plate; 16. Hinge; 17. Handle; 18. Explosion-proof stuffing box; 21. Explosion-proof push button light; 22. Explosion-proof push button; 23. Ammeter; 31. Support column; 32. Mounting panel; 33. First reinforcing rib; 34. Second reinforcing rib. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0036] This utility model provides a marine explosion-proof master control device, including an explosion-proof master control unit, an increased safety housing 11 and a mounting base, wherein the explosion-proof master control unit is connected to an electrical control cabinet and a frequency converter.

[0037] like Figures 1-4 As shown, the explosion-proof master control unit is made of 304 stainless steel. The thickness of the housing 11, flange cover plate 12, and flange mating surface is greater than or equal to 15mm, providing high strength and rigidity to ensure that the main structure meets the explosion-proof requirements. The explosion-proof master control unit is installed inside the increased safety housing 11, which includes the housing 11 and the flange cover plate 12. The flange cover plate 12 is installed on the open side of the housing 11. The housing 11 and the flange cover plate 12 are connected on one side by a hinge 16. A handle 17 is provided on the outer surface of the flange cover plate 12. The controller is installed inside the housing 11, and the explosion-proof electrical equipment is installed on the flange cover plate 12. A non-metallic insulating gasket is installed between the explosion-proof electrical equipment and the flange cover plate 12.

[0038] Explosion-proof electrical equipment includes explosion-proof push-button lights 21, explosion-proof push-buttons 22, ammeters 23, and heaters. For example... Figure 5 As shown, the explosion-proof master control unit has an epoxy resin insulation board 13 inside, and a terminal block 14 is provided on the epoxy resin insulation board 13. The explosion-proof electrical equipment and the controller are connected through the terminal block 14. The housing 11 is provided with an explosion-proof stuffing box 18. The cables of the electrical control cabinet and the frequency converter are connected to the controller through the explosion-proof stuffing box 18 and the terminal block 14. After the cables are installed, the inside of the explosion-proof stuffing box 18 is sealed with a two-component sealing material to ensure the isolation of the internal and external environments of the explosion-proof master control unit. The bottom of the explosion-proof master control unit is provided with a mounting plate 15, which is used to fix it in the increased safety housing 11.

[0039] like Figures 6-8As shown, the increased safety housing 11 is made of 304 stainless steel and is mounted on the ship via a mounting bracket. The increased safety housing 11 has an IP55 protection rating, and its inner wall provides sufficient space for the explosion-proof master control unit. The primary purpose of the increased safety housing 11 is to protect the explosion-proof master control unit when not in operation, preventing accelerated aging of control components due to ultraviolet radiation and resisting various external impacts. When the explosion-proof master control unit needs to be operated, the increased safety housing 11 is first opened, and then the switch is activated. The increased safety housing 11 has grounding protection to ensure that the housing 11 is not energized. In the event of a foreseeable fault, such as poor contact or damage to the explosion-proof electrical equipment, the circuit is disconnected, preventing short circuits that could cause sparks or high temperatures.

[0040] The explosion-proof master control unit and the increased safety housing 11 made of stainless steel have high strength and strong impact resistance. They will not corrode and thus affect the explosion-proof capability when placed in a high-salt and high-humidity marine environment for a long time.

[0041] like Figures 9-11 As shown, the mounting base includes a support column 31 and a mounting panel 32. The mounting panel 32 is mounted on the support column 31, which is perpendicular to the ground and fixed to the ground. The angle between the mounting panel 32 and the ground is an acute angle. A first reinforcing rib 33 is provided between the support column 31 and the ground, and a second reinforcing rib 34 is provided between the support column 31 and the mounting panel 32.

[0042] According to the national standard GB / T3836.2-2021 Explosive Atmospheres, Equipment Protected by Flameproof Enclosures "d",

[0043] Explosion-proof equipment is defined as: a type of explosion-proof electrical equipment whose enclosure can withstand the internal explosion of an explosive mixture that enters the enclosure through any joint surface or structural gap without damage, and will not cause ignition of an external explosive gas atmosphere formed by one or more gases or vapors.

[0044] According to the national standard GB / T 3836.3-2021 Explosive Atmospheres, Equipment Protected by Increased Safety Type "e",

[0045] Increased safety equipment is defined as: an explosion-proof type of electrical equipment or Ex components, with additional measures to improve its safety and prevent excessive temperature and the generation of electric arcs and sparks.

[0046] Based on the definitions and requirements of explosion-proof and increased safety electrical equipment, and the standards and specifications such as GB / T 3836.1-2021 Explosive Atmospheres Part 1: Equipment General Requirements, GB / T 3836.2-2021 Explosive Atmospheres, Equipment Protected by Explosion-proof Enclosures "d", GB / T 3836.3-2021 Explosive Atmospheres, Equipment Protected by Increased Safety "e", etc., and combined with the requirements of electrical equipment in the marine industry, in this utility model, since no explosive gases or dust are generated inside the master control unit, the main direction of explosion-proof control is to prevent external explosive gases and dust from entering the master control unit. On this basis, additional measures are taken to prevent excessive internal temperature or the generation of electric arcs and sparks, further improving safety, thus forming an increased safety type.

[0047] The width and length of the mating surfaces of the housing 11 and the flange cover 12 shall not be less than the minimum width required for explosion-proof mating surfaces. The gap shall not exceed the maximum safe gap required for explosion-proof. The surfaces of the mating surfaces shall be treated as necessary to achieve or exceed the surface roughness required by the explosion-proof standard, ensuring that the gap does not exceed the maximum safe gap required for explosion-proof. The installation of explosion-proof electrical equipment on the flange cover 12, and the installation and installation of instruments and other display devices with the flange cover 12, shall ensure that the insulation materials, sealing type, and sealing materials meet the explosion-proof requirements. All explosion-proof electrical equipment, etc., shall be explosion-proof and shall meet the explosion-proof requirements.

[0048] This utility model simultaneously meets the technical requirements of other national standards for explosion-proof, flameproof, and increased safety types.

[0049] The mating surfaces of the housing 11 and flange cover 12 are precision ground and then polished, with a surface roughness of not less than Ra0.8 and a flatness not exceeding 0.01 mm. The width of the mating surface is greater than 1.5 times the minimum width. After installation, the gap between the mating surfaces is 12.5% ​​of the maximum safe gap for Class IIA and 25% of the maximum safe gap for Class IIB. The distance from the through holes of the bolts used to install and fasten the control panel and housing 11 to the edge of the inner wall of housing 11 is greater than 2.6 times the minimum allowable value. Through the above structural and technical requirements and process parameters, the explosion-proof effect is ensured, reaching Gb and Db levels.

[0050] Ga-grade explosion-proof push button lights 21 and explosion-proof push button 22 are selected. The housing of these components is made of non-metallic insulating material. When installed on the control panel, a Class II non-metallic insulating sealing gasket is placed between the mating surface of the components and the panel. This not only provides a sealing function but also increases the creepage distance and clearance. The actual creepage distance is 9-10 times greater than the minimum creepage distance required by the standard, and the actual clearance is 9-10 times greater than the minimum clearance required by the standard.

[0051] The epoxy resin insulating board 13 possesses excellent insulation properties and resistance to acids, alkalis, and organic solvents. Terminal blocks 14 are installed on the epoxy resin insulating board 13, with wires and terminals connected by compression. Connections between terminals and terminal blocks and electrical components rely on mechanical devices such as spring sheets for clamping. All terminals are insulated from each other and maintain a certain distance. These measures essentially eliminate the possibility of arcing and sparking, thus achieving enhanced safety. The epoxy resin insulating board 13 has a sufficiently large area to ensure that, under foreseeable fault conditions, the creepage distance and clearance between electrical components installed on the insulating board are far greater than the standard requirements.

[0052] This utility model is made of 304 stainless steel, and its structure, manufacturing process, and auxiliary materials have been optimized. It meets the requirements of the high temperature difference, high salt and high humidity environment on board ships, while ensuring structural strength. At the same time, it eliminates the need for complex processes such as mold making, which greatly reduces manufacturing costs and shortens the production cycle. The overall structure can be adjusted in size as needed to expand its functions and add more control components and display instruments.

[0053] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A marine explosion-proof master control device, characterized by comprising: The device is connected with the electric control cabinet and the frequency converter, and comprises an explosion-proof main control unit, an enhanced shell (11) and a mounting seat, wherein the explosion-proof main control unit is installed in the enhanced shell (11), and the enhanced shell (11) is installed on the ship through the mounting seat; the explosion-proof main control unit comprises a shell (11) and a flange cover plate (12), the shell (11) is provided with a controller, the flange cover plate (12) is installed on one side of the shell (11), explosion-proof electrical equipment is installed on the flange cover plate (12), and the controller is electrically connected with the explosion-proof electrical equipment, the electric control cabinet and the frequency converter.

2. A marine explosion-proof master control device according to claim 1, characterized in that The explosion-proof main control unit is made of 304 stainless steel; and the enhanced shell (11) is made of 304 stainless steel.

3. A marine explosion-proof master control device according to claim 1, characterized in that, The explosion-proof main control unit is internally provided with an epoxy resin insulating plate (13), the epoxy resin insulating plate (13) is provided with a terminal block row (14); and the explosion-proof main control unit is provided with a mounting plate (15) and is fixed in the enhanced shell (11) through the mounting plate (15).

4. A marine explosion-proof master control device according to claim 1, characterized in that, The shell (11) and the flange cover plate (12) are connected through a hinge (16) on one side of the shell (11) and the flange cover plate (12); and the flange cover plate (12) is provided with a handle (17) on the outer surface.

5. A marine explosion-proof master control device according to claim 1, characterized in that, The shell (11) is provided with an explosion-proof packing gland (18), cables of the frequency converter and the electric control cabinet are connected with the controller through the explosion-proof packing gland (18), and the explosion-proof packing gland (18) connected with the cables is internally provided with a sealing material.

6. A marine explosion-proof master control device according to claim 1, characterized in that The explosion-proof electrical equipment comprises an explosion-proof button lamp (21), an explosion-proof button (22), an ammeter (23) and a heater.

7. A marine explosion-proof master control device according to claim 1, characterized in that, A non-metal insulating sealing gasket is installed between the explosion-proof electrical equipment and the flange cover plate (12).

8. A marine explosion-proof master control device according to claim 1, characterized in that, The roughness of the contact surface of the shell (11) and the flange cover plate (12) is not less than Ra0.8, and the flatness is not more than 0.01 mm.

9. A marine explosion-proof master control device according to claim 1, characterized in that, The mounting seat comprises a support column (31) and a mounting panel (32), the mounting panel (32) is installed on the support column (31), the support column (31) is perpendicular to the ground and is fixed on the ground, the included angle between the mounting panel (32) and the ground is an acute angle, and the enhanced shell (11) is installed on the mounting panel (32).

10. A marine explosion-proof master control device according to claim 9, characterized in that The first reinforcing rib (33) is arranged between the support column (31) and the ground, and the second reinforcing rib (34) is arranged between the support column (31) and the mounting panel (32).

Images