Ship electrical control cabinet resistant to impact vibration

Abstract

The utility model discloses a ship electrical control cabinet resistant to impact vibration, a frame-type skeleton comprises a cuboid-shaped outer skeleton and a cuboid-shaped inner skeleton, a vibration isolator is arranged between the outer skeleton and the inner skeleton, and the inner skeleton is provided with a transversely-arranged or longitudinally-arranged equipment installation batten; the closed cabinet door is of an up-down double-door structure, a reinforcing beam is arranged in the middle of the door opening side of the cabinet body, the reinforcing beam is connected with cabinet body side plates on the two sides, the door opening side is divided into an upper door opening and a lower door opening by the reinforcing beam, and an upper door and a lower door are correspondingly hinged to the two door openings. According to the utility model, the impact resistance of the electrical control cabinet is improved through the selection of cabinet body materials, the design of a cabinet body structure, the vibration isolation design, the design of an electric cabinet production process, and the arrangement and installation design of components. The adopted method is based on the original basic design requirements of the electrical control cabinet and almost has no special requirements, and the impact resistance of the electrical control cabinet can be well improved through the method provided by the utility model.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical control cabinets, in particular to an impact-vibration-resistant marine electrical control cabinet. Background Art

[0002] Electric control boxes are usually used in industrial sites and contain a large number of precision electrical components such as PLCs. These environments may be subject to adverse factors such as vibration and impact. Therefore, electric control boxes need to have a certain degree of impact resistance to ensure their structural integrity and the normal operation of internal electrical components. In addition, nowadays, especially military products have requirements for equipment reliability and environmental adaptability, and the specifications that need to be met are also relatively strict. Therefore, it is necessary to specifically consider the impact resistance of electric control boxes in design.

[0003] The main effects of shock are:

[0004] a. Permanent deformation and fracture of hull structural parts and equipment components caused by overstress;

[0005] b. Collision and extrusion caused by relative movement between equipment and equipment, or between equipment and ship structure;

[0006] c. The destruction of the original force balance;

[0007] d. Changes in equipment functionality;

[0008] e. Indirect injury or damage to persons or equipment.

[0009] The design of the equipment should fully consider the vertical, transverse and longitudinal impact, inertia force and deformation transmitted through the hull structure.

[0010] In view of the above, it is necessary to propose a ship electrical control cabinet that is resistant to shock and vibration to solve the above problems. Utility Model Content

[0011] The purpose of the utility model is to overcome the defects in the prior art and provide a ship electrical control cabinet that is resistant to shock and vibration.

[0012] To achieve the above-mentioned object, the technical solution of the present utility model is as follows: A ship electrical control cabinet resistant to shock and vibration, comprising a frame-type skeleton, an integrated covering panel, and a closed cabinet door;

[0013] The frame-type skeleton includes a rectangular outer skeleton and an inner skeleton, and a vibration isolator is arranged between the outer skeleton and the inner skeleton. The vibration isolator is arranged in vertical, horizontal and longitudinal directions; the inner skeleton is provided with a horizontal or vertical equipment installation strip;

[0014] The integrated cladding panel is formed by bending a whole steel plate on all sides except the door side, and the welds are fully welded from the outside and polished flat, and then welded from the inside;

[0015] The closed cabinet door adopts an upper and lower double-door structure, and a reinforcement beam is set in the middle of the door opening side of the cabinet body. The reinforcement beam connects the cabinet side panels on both sides. The reinforcement beam divides the door opening side into an upper door opening and a lower door opening. The upper door and the lower door are correspondingly hinged on the two door openings.

[0016] Furthermore, an impact-resistant structure is provided on the outer side of the integrated covering panel, and the impact-resistant structure includes a frame and a plate-shaped anti-collision elastic body. The plate-shaped anti-collision elastic body is placed in the frame, and the frame is fixedly installed on the outer side of the integrated covering panel to form impact-resistant protection.

[0017] Furthermore, the plate-shaped anti-collision elastic body is made of an elastic material composited with Kevlar nanofiber and rubber.

[0018] Furthermore, the production of the plate-shaped anti-collision elastic body includes the following steps:

[0019] S1: Cut Kevlar yarn into small segments of 1-2 cm, soak in sewage ethanol and ultrasonicate, rinse with deionized water and vacuum dry; mix 0.7-1.2 parts of Kevlar yarn with 250 parts of potassium hydroxide in a ratio, add 100-150 parts of dimethyl sulfoxide, stir at room temperature and ultrasonicate to form a uniform dark red Kevlar fiber dimethyl sulfoxide dispersion;

[0020] S2: adding 1 part of the dispersion prepared in step 1 to 100 parts of carboxylated nitrile rubber, stirring at room temperature, and adjusting the pH to about 1 with a dilute sulfuric acid solution; preparing a 7 wt % NaCl solution, and slowly adding the aforementioned latex blend to the NaCl solution to gel; soaking and washing the flocculent with deionized water at least 3 times, and then drying it in an electric constant temperature blast drying oven at 60°C for 24 hours; removing the rubber from the oven, chopping it into pieces, and then drying it in a vacuum oven at 60°C for 24 hours. During this period, the rubber can be repeatedly weighed to ensure complete evaporation of water to obtain a masterbatch;

[0021] S3: Weigh the dried masterbatch, add zinc oxide (ZnO), stearic acid (SA), N-cyclohexyl-2-benzothiazolesulfenamide (CZ), and sulfur (S), and mix on a rubber mill. The ratio of the masterbatch: ZnO: SA: CZ: S is 100: 2: 2.5: 2.2: 1.5.

[0022] The rubber compound was left for 24 hours, and the vulcanization time was measured on a vulcanizer at 160°C. Then, an appropriate amount of rubber compound was weighed and placed into a mold, and vulcanized using a flat vulcanizer at 160°C and 15 MPa to obtain a plate-shaped anti-collision elastomer.

[0023] Furthermore, the vibration isolator includes a spiral elastic part, an upper mounting bar, and a lower mounting bar. The upper mounting bar and the lower mounting bar are arranged parallel to the axis of the spiral elastic part on both sides thereof, and the upper mounting bar and the lower mounting bar are both composed of a first clamping bar and a second clamping bar. The first clamping bar and the second clamping bar respectively clamp and fix the spiral elastic part from the inner and outer sides.

[0024] Furthermore, a plurality of sections of spiral elastic members are provided between the upper mounting bar and the lower mounting bar, and the spiral elastic members of two adjacent sections have opposite rotation directions.

[0025] Furthermore, vibration isolators are provided between the bottom of the inner frame and the four ribs between the outer frame, and vertically arranged vibration isolators are provided between the two sides and the back of the inner frame and the outer frame.

[0026] Furthermore, the thickness of the integrated covering plate is 2.0 mm.

[0027] The thickness of the sheet material used for the closed cabinet door is 2.5mm

[0028] The thickness of the outer frame and inner frame is 3.0mm.

[0029] Furthermore, a reinforcement member is installed inside the back plate of the integrated covering panel.

[0030] The advantages and beneficial effects of the present invention are as follows: The present invention improves the shock resistance of a ship electrical control cabinet by optimizing the selection of cabinet materials, cabinet structure design, vibration isolation design, electrical control box production process design, and component layout and installation design. The methods employed are based on basic electrical control cabinet design requirements and require few special requirements. Furthermore, the present invention significantly improves the shock resistance of the electrical control cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of a ship electrical control cabinet that is resistant to shock and vibration according to the utility model;

[0032] Figure 2 It is a structural schematic diagram of the impact-resistant structure of the utility model;

[0033] Figure 3 This is an exploded view of a shock and vibration resistant marine electrical control cabinet of the utility model;

[0034] Figure 4It is an isometric view of the vibration isolator in the utility model;

[0035] Figure 5 This is a front view of the vibration isolator in the utility model;

[0036] In the figure: 1. Frame-type skeleton; 2. Integrated covering panel; 3. Closed cabinet door; 4. External skeleton; 5. Internal skeleton; 6. Vibration isolator; 7. Mounting strip; 8. Reinforcement beam; 9. Upper door opening; 10. Lower door opening; 11. Upper door; 12. Lower door; 13. Surrounding frame; 14. Plate-shaped anti-collision elastomer; 15. Spiral elastic member; 16. Upper mounting strip; 17. Lower mounting strip; 18. First clamping strip; 19. Second clamping strip; 20. Reinforcement member; 21. Back panel; 22. Side panel. DETAILED DESCRIPTION

[0037] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] A ship electrical control cabinet resistant to shock and vibration, such as Figure 1-5 As shown, it includes a frame frame 1, an integrated covering panel 2, and a closed cabinet door 3;

[0039] like Figure 3 As shown, the frame-type skeleton 1 includes an outer skeleton 4 and an inner skeleton 5 in the shape of a rectangular parallelepiped.

[0040] The frame-type structure has a higher box strength and is more convenient for installing electrical components. In order to meet the impact resistance requirements, the back panel 21 and the side panels 22 are both bent from a whole piece of steel plate. All necessary welding points must be welded firmly, and there are no welds on the outside, which ensures the rigidity of the box to the greatest extent and meets the impact resistance requirements. In addition, this type of electric control box has a better electrical shielding effect and can meet the anti-electromagnetic compatibility requirements of the box.

[0041] The length and width of the inner frame 5 are slightly smaller than those of the outer frame 4, so when the inner frame 5 is installed in the outer frame 4, a certain spacing is formed between the two in the left and right and up and down directions, and a vibration isolator 6 is set in the spacing between the outer frame 4 and the inner frame 5.

[0042] Vibration isolator 6 is a very important measure to meet the shock resistance requirements of the equipment. As a combined type of equipment, the electrical control cabinet is easily affected by various factors under the influence of the mechanical environment. Especially on ships, the interior of the control cabinet is often subjected to vibration and impact, which can easily affect the structural parts and components. Only by effectively eliminating these interference factors can the safe and stable operation of the electrical control cabinet be guaranteed. The vibration isolation system plays a very important role in the electrical control cabinet and has a significant impact on the service life of electrical equipment. Therefore, it is of great significance to explore the design of the vibration isolation system in the electrical control cabinet, which can improve the development level of the electrical industry. Figure 1 、 2 , 3. The vibration isolators 6 are arranged in the vertical, horizontal and vertical directions. Specifically, the vibration isolators 6 are arranged in the space between the bottom of the inner frame 5 and the outer frame 4. There are two vibration isolators 6 at the bottom in the horizontal direction and two in the vertical direction. Furthermore, the vibration isolators 6 are arranged vertically between the two sides and the back of the inner frame 5 and the outer frame 4. Figure 3 As shown, at least two vertical vibration isolators 6 are provided between the inner frame 5 and the left side plate 22, and at least two symmetrical vibration isolators 6 are also provided on the right side. Vibration isolators 6 are also appropriately provided between the inner frame 5 and the back plate 21;

[0043] When designing a vibration isolation system for an electrical automatic control cabinet, it's important to fully consider the cabinet's structure and shape to ensure a more scientific support structure and good rigidity. To prevent deformation and bending of the electrical control cabinet due to load, the spacing between the isolators (6) should not be excessively large; it's crucial to ensure that all support points are evenly loaded. Furthermore, it's important to rationally select different models and strengths of isolators (6), effectively adjusting them within a certain range based on experimental test results, and ensuring that the rigidity of the isolators (6) matches the load. Furthermore, the support structure of the isolators (6) in an uncoupled environment should be carefully considered, with additional isolators (6) added to the sides and back to mitigate the intensity and frequency of coupled vibrations, thereby enhancing the equipment's dynamic stability in the external operating environment. The superior performance of the isolators (6) in a mechanical environment is key to ensuring the proper operation of the equipment. The isolators (6) must be scientifically selected, taking into account both their vibration isolation and impact isolation performance. The damping value should also be rationally set, taking into account the complex conditions of the electrical equipment and the maximum acceleration during operation.

[0044] In this embodiment, the vibration isolator 6 is as follows Figure 4 、 5As shown, it includes a spiral elastic member 15, an upper mounting bar 16, and a lower mounting bar 17. In actual use, the spiral elastic member 15 can be formed by winding multiple strands of steel wire rope in a spring shape. The upper mounting bar 16 and the lower mounting bar 17 are arranged parallel to the axis of the spiral elastic member 15 on both sides thereof, so that the two mounting bars are connected to the mounting base surfaces on both sides and the impact buffering and vibration isolation effects are achieved between the two. Figure 4 As shown, the upper mounting bar 16 and the lower mounting bar 17 are both composed of a first clamping bar 18 and a second clamping bar 19. The first clamping bar 18 and the second clamping bar 19 clamp and fix the spiral elastic member 15 from the inner and outer sides respectively. Figure 5 As shown, multiple sections of spiral elastic members 15 are provided between the upper mounting bar 16 and the lower mounting bar 17, and the rotation directions of the two adjacent sections of the spiral elastic members 15 are opposite. The two oppositely arranged spiral elastic members 15 can buffer the axial slippage of the two mounting bars as much as possible.

[0045] Specifically, the integrated cover panel 2 is formed from a single piece of bent steel plate on all sides except the door side. During production, the control box is constructed from a single piece of bent steel plate. The welded joints are reinforced with full welds and forged welds. The exterior is fully welded and polished, while the interior is welded to ensure strength. This is then polished to a smooth finish after welding to increase the box's strength. The smooth surface also enhances the control box's electromagnetic interference resistance. Reinforcement ribs are installed at the bottom and back where the vibration isolators 6 are mounted to prevent them from falling off and to evenly distribute impact forces throughout the control box.

[0046] The closed cabinet door 3 adopts a double-door structure, and a reinforcement beam 8 is set in the middle of the door opening side of the cabinet body. The reinforcement beam 8 connects the cabinet side panels 22 on both sides.

[0047] The electrical control cabinet features a front opening, with a flexible sealing strip installed at the opening to seal the cabinet door. This provides a waterproof and dustproof design, while also reducing noise and the impact of shock and vibration on the cabinet. The project's height (over 2 meters) ensures the cabinet door's strength. A reinforcing beam 8 in the middle of the front opening divides the door opening into an upper door opening 9 and a lower door opening 10. These two openings are hinged with an upper door 11 and a lower door 12. The cabinet's double-door structure maximizes both maintenance requirements and shock resistance.

[0048] Due to considerations for the impact resistance of the electrical control cabinet, as well as the operating environment and electromagnetic compatibility, most electrical control cabinets are currently made of carbon steel. This steel has high strength and rigidity, making it suitable for cabinets subject to large impact loads. Although the thickness of a material is proportional to its impact resistance, considering the impact of thickness on its size, quality, applicability, and affordability in practical applications, and to ensure the strength and stability of the electrical control cabinet structure, the final thickness of the integrated cover panel 2 was determined to be 2.0mm, the closed cabinet door 3 door panel thickness was 2.5mm, and the frame frame 1 strip thickness was 3.0mm. This thickness ensures the cost-effectiveness of the electrical control cabinet while also ensuring the strength and stability of the cabinet structure, improving the cabinet's vibration resistance and protecting the electrical components within the cabinet from the effects of shock and vibration.

[0049] The inner frame 5 is provided with a horizontal or vertical equipment mounting strip 7; the position of the mounting strip 7 can be fixed by bolts, so that the position of each mounting strip 7 can be easily adjusted to adapt to the installation of different electrical equipment. When arranging components, attention should be paid to the center of gravity of each electrical component. When arranging equipment, it is best not to have the center of gravity of the equipment too high. Measures can be taken to lower the center of gravity. Under the premise of ensuring the weight of the equipment, the bottom quality can be improved. Heavier electrical components such as transformers and inverters should be placed at the bottom of the mounting plate in the box, or mounting brackets should be designed at the bottom of the box to install the heavier electrical components at the bottom of the box. Electrical components such as circuit breakers that are not resistant to impact and vibration and are prone to malfunction when impacted should not be placed on the door of the electric control box to prevent the electric control box from malfunctioning when subjected to impact.

[0050] The back plate 21 of the integrated cover plate 2 is internally installed with a reinforcement 20. The reinforcement 20 is installed on the back to ensure the strength of the entire back of the box, and to ensure that the box itself will not be damaged during impact. The back of the box is where electrical components are installed, so it has higher strength.

[0051] As an improvement, the outer side of the integrated cover panel 2 is provided with an impact-resistant structure. This impact-resistant structure includes a frame 13 and a plate-shaped anti-collision elastic body 14. The plate-shaped anti-collision elastic body 14 is housed within the frame 13 and fixedly mounted on the outer side of the integrated cover panel 2 to provide impact protection. This structure effectively prevents collision damage and prevents sharp objects from piercing the cabinet. Specifically, the plate-shaped anti-collision elastic body 14 is made of an elastic material composited with Kevlar nanofiber and rubber. Kevlar fiber has extremely high strength, even exceeding that of steel of the same weight. It can withstand heavy loads while maintaining structural integrity, making it ideal for applications requiring high strength, such as protective equipment and safety devices. Despite its extremely high strength, Kevlar fiber has a relatively low density, approximately one-fifth that of steel. This allows its use in electrical control cabinets to significantly reduce the overall weight of the equipment and achieve better protection. Kevlar nanofiber, with its advantages such as high modulus, high strength, and high heat resistance, is particularly suitable for use in protective structures for electrical control cabinets.

[0052] Specifically, the production of the plate-shaped anti-collision elastic body 14 includes the following steps:

[0053] S1: Cut Kevlar yarn into small segments of 1-2 cm, soak in sewage ethanol and ultrasonicate, rinse with deionized water and vacuum dry; mix 0.7-1.2 parts of Kevlar yarn with 250 parts of potassium hydroxide in a ratio, add 100-150 parts of dimethyl sulfoxide, stir at room temperature and ultrasonicate to form a uniform dark red Kevlar fiber dimethyl sulfoxide dispersion;

[0054] S2: adding 1 part of the dispersion prepared in step 1 to 100 parts of carboxylated nitrile rubber, stirring at room temperature, and adjusting the pH to about 1 with a dilute sulfuric acid solution; preparing a 7 wt % NaCl solution, and slowly adding the aforementioned latex blend to the NaCl solution to gel; soaking and washing the flocculent with deionized water at least 3 times, and then drying it in an electric constant temperature blast drying oven at 60°C for 24 hours; removing the rubber from the oven, chopping it into pieces, and then drying it in a vacuum oven at 60°C for 24 hours. During this period, the rubber can be repeatedly weighed to ensure complete evaporation of water to obtain a masterbatch;

[0055] S3: Weigh the dried masterbatch, add zinc oxide (ZnO), stearic acid (SA), N-cyclohexyl-2-benzothiazolesulfenamide (CZ), and sulfur (S), and mix on a rubber mill. The ratio of the masterbatch: ZnO: SA: CZ: S is 100: 2: 2.5: 2.2: 1.5.

[0056] The rubber material was left for 24 hours, and the vulcanization time was measured on a vulcanizer at 160°C; then, an appropriate amount of rubber material was weighed and placed in a mold, and vulcanized using a flat vulcanizer at 160°C and 15MPa to obtain a plate-shaped anti-collision elastomer 14.

[0057] After centrifugation, ultrasound and other steps, modified Kevlar nanofibers with good water dispersibility are obtained, and then they are blended with a polar carboxyl nitrile rubber system using an emulsion blending method to obtain a rubber nanocomposite material with excellent performance; at the same time, the modified Kevlar nanofibers also have a volume-enhancing and reinforcing effect on the carboxyl nitrile rubber blend system, thereby greatly reducing the manufacturing cost.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A ship electrical control cabinet resistant to shock and vibration, characterized in that: It comprises a frame-type skeleton (1), an integrated covering panel (2), and a closed cabinet door (3); The frame-type skeleton (1) includes a rectangular outer skeleton (4) and an inner skeleton (5), a vibration isolator (6) is arranged between the outer skeleton (4) and the inner skeleton (5), and the arrangement direction of the vibration isolator (6) includes vertical, horizontal, and longitudinal directions; the inner skeleton (5) is provided with a horizontal or vertical equipment installation strip (7); The integrated covering panel (2) is formed by bending a whole steel plate on all sides except the door side; The closed cabinet door (3) adopts an upper and lower double-door structure, and a reinforcing beam (8) is provided in the middle of the door opening side of the cabinet body, and the reinforcing beam (8) connects the cabinet body side panels (22) on both sides. The reinforcing beam (8) divides the door opening side into an upper door opening (9) and a lower door opening (10), and the upper door opening (11) and the lower door opening (12) are hingedly provided on the two door openings.

2. The shock and vibration resistant ship electrical control cabinet according to claim 1, characterized in that: An impact-resistant structure is provided on the outer side of the integrated covering panel (2), the impact-resistant structure comprising a surrounding frame (13) and a plate-shaped anti-collision elastic body (14), the plate-shaped anti-collision elastic body (14) being placed in the surrounding frame (13), and the surrounding frame (13) being fixedly mounted on the outer side of the integrated covering panel (2) to form impact-resistant protection.

3. The shock and vibration resistant ship electrical control cabinet according to claim 1, characterized in that: The vibration isolator (6) includes a spiral elastic member (15), an upper mounting bar (16), and a lower mounting bar (17). The upper mounting bar (16) and the lower mounting bar (17) are arranged parallel to the axis of the spiral elastic member (15) on both sides thereof, and the upper mounting bar (16) and the lower mounting bar (17) are both composed of a first clamping bar (18) and a second clamping bar (19). The first clamping bar (18) and the second clamping bar (19) clamp and fix the spiral elastic member (15) from the inner and outer sides, respectively.

4. The shock-vibration-resistant ship electrical control cabinet according to claim 3, characterized in that: A plurality of sections of spiral elastic members (15) are provided between the upper mounting strip (16) and the lower mounting strip (17), and the spiral elastic members (15) of two adjacent sections have opposite rotation directions.

5. A ship electrical control cabinet resistant to shock and vibration according to any one of claims 1, 3 and 4, characterized in that: Vibration isolators (6) are provided between the bottom of the inner frame (5) and the four ribs between the outer frame (4), and vertically arranged vibration isolators (6) are provided between the two sides and the back of the inner frame (5) and the outer frame (4).

6. The shock and vibration resistant ship electrical control cabinet according to claim 1, characterized in that: The thickness of the sheet material used in the integrated covering panel (2) is 2.0 mm. The thickness of the sheet material used for the closed cabinet door (3) is 2.5mm The sheet thickness of the outer frame (4) and the inner frame (5) is 3.0 mm.

7. The shock-vibration-resistant ship electrical control cabinet according to claim 1, characterized in that: A reinforcement member (20) is installed inside the back plate (21) of the integrated covering panel (2).

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