Anti-seismic cabinet frame and anti-seismic cabinet

Abstract

The invention relates to the technical field of roller mounting structures, in particular to an anti-seismic cabinet frame and an anti-seismic cabinet, and the frame comprises two side frames with vertical cavities and first mounting grooves on the side walls; the top frame is connected to the tops of the two side frames, and a second mounting groove is formed in the inner wall of the top frame; the upper inclined struts are mounted at the connecting corners of the side frames and the top frame, and the two side walls of each upper inclined strut are mounted at the upper end of the corresponding first mounting groove and in the corresponding second mounting groove respectively; the bottom frame is connected to the bottoms of the two side frames, and a third mounting groove is formed in the inner wall of the bottom frame; the lower inclined struts are installed at the connecting corners of the side frames and the bottom frame, the two side walls of each lower inclined strut are installed at the lower end of the corresponding first installation groove and in the corresponding third installation groove respectively, and it is ensured that the cabinet has enough lateral rigidity while the available operation and maintenance area of the front face of the cabinet is maximized. The anti-seismic cabinet is matched with the anti-seismic cabinet frame.

Description

Technical Field

[0001] The present invention relates to the technical field of roller mounting structures, and in particular to an earthquake-resistant cabinet frame and an earthquake-resistant cabinet. Background Art

[0002] Safety-grade cabinets in nuclear power plants provide a stable working environment for various safety-grade DCS systems and specialized instrumentation and control equipment. Furthermore, to ensure the functionality and reliability of the internal electronic equipment, the cabinets must be resistant to seismic and impact.

[0003] Existing cabinet main frames typically utilize welded sheet metal structures. Because the front and back of the cabinet serve as installation and operation areas, crossbeams are typically not installed. However, side crossbeams can be installed on the sides of the cabinet to serve as mounting interfaces and increase structural rigidity. As a result, existing cabinets often have lower left-right stiffness than front-to-back stiffness. As a result, the fundamental frequency of conventional cabinets typically corresponds to the left-right modal vibration mode and generally does not exceed 10Hz. Furthermore, the peak frequency of the earthquake floor response spectrum of a typical nuclear power plant is also typically concentrated in the frequency range of 10Hz or less.

[0004] Therefore, insufficient cabinet stiffness can easily lead to resonance response in the earthquake frequency band with the highest energy density, resulting in structural damage. Summary of the Invention

[0005] In response to the technical problem of insufficient rigidity of existing cabinets, the present invention provides a seismic-resistant cabinet frame and a seismic-resistant cabinet, which maximize the available operating and maintenance area on the front of the cabinet while ensuring that the cabinet has sufficient lateral rigidity, thus resolving the contradiction between the seismic resistance of the cabinet and the internal available space.

[0006] The present invention is achieved through the following technical solutions: In the first aspect, the present invention provides an earthquake-resistant cabinet frame, comprising: two side frames, the side walls of which have a vertical cavity and a first mounting groove; a top frame connected to the tops of the two side frames, the inner wall of which is provided with a second mounting groove; an upper diagonal brace installed at each connecting corner of the side frame and the top frame, and the two side walls of each upper diagonal brace are respectively installed in the corresponding upper end of the first mounting groove and the second mounting groove; a bottom frame connected to the bottoms of the two side frames, the inner wall of which is provided with a third mounting groove; a lower diagonal brace installed at each connecting corner of the side frame and the bottom frame, and the two side walls of each lower diagonal brace are respectively installed in the corresponding lower end of the first mounting groove and the third mounting groove.

[0007] It should be noted that the main frame structure of existing cabinets generally adopts a sheet metal welding structure. Since the front and back of the cabinet are installation and operation areas, crossbeam structures are generally not installed. However, side crossbeams can be installed on both sides of the cabinet as installation interfaces and also increase the structural rigidity. As a result, existing cabinets have the problem that the rigidity in the left-right direction is less than the rigidity in the front-to-back direction. As a result, the fundamental frequency of conventional cabinets generally corresponds to the modal vibration shape in the left-right direction, and the fundamental frequency generally does not exceed 10Hz. The peak frequency of the earthquake floor response spectrum of a general nuclear power plant is generally concentrated in a frequency band not exceeding 10Hz. Therefore, the insufficient rigidity of the cabinet can easily cause a resonant response in the earthquake frequency band with the highest energy density, resulting in structural damage.

[0008] To improve the lateral rigidity of the cabinet, one possible solution is to increase the width of the columns on both sides to increase the lateral rigidity of the entire cabinet. This method can effectively improve the cabinet's fundamental frequency, but it also brings the problem of excessive column width. Given a certain total cabinet width, the cabinet spacing is reduced, resulting in obstruction of front and rear operating and observation space, affecting the cabinet's operability.

[0009] Another optional solution is: This method can also effectively improve the fundamental frequency of the cabinet, but the design of the diagonal brace also has technical contradictions. If the size is too large, it will affect the available width space in the cabinet and increase the stress at the column connection. If the size is too small, it cannot effectively strengthen the frame, and it is impossible to take into account both the operating and maintenance space and the structural performance.

[0010] In view of this, the earthquake-resistant cabinet frame provided by the present invention includes a side frame, a top frame, an upper diagonal brace, a bottom frame and a lower diagonal brace; the side frame is provided with two, and the side walls have a vertical cavity and a first mounting groove, so that the side frame has sufficient rigidity and a flat structure can be adopted; the top frame is connected to the top of the two side frames, and the inner wall is provided with a second mounting groove, the upper diagonal brace is installed at each connecting corner of the side frame and the top frame, and the two side walls of each upper diagonal brace are respectively installed in the corresponding upper end of the first mounting groove and the second mounting groove, so that the upper diagonal brace is connected to the side frame and the top frame through an embedded structure, and at the same time, the bottom frame is connected to the bottom of the two side frames, and the inner wall is provided with a third mounting groove, the lower diagonal brace is installed at each connecting corner of the side frame and the bottom frame, and the two side walls of each lower diagonal brace are respectively installed in the corresponding lower end of the first mounting groove and the third mounting groove, so that the lower diagonal brace is connected to the side frame and the bottom frame through an embedded structure, thereby optimizing the lateral rigidity of the cabinet while obtaining a minimized structural front projection area to improve operation and maintainability.

[0011] Therefore, the present invention can maximize the available operation and maintenance area on the front of the cabinet while ensuring that the cabinet has sufficient lateral rigidity, thereby resolving the contradiction between the anti-seismic performance of the cabinet and the available internal space.

[0012] In an optional embodiment of the present application, the side frame includes: a side wall plate, which is a sheet metal part, with first grooves provided on both sides in the long direction and multiple hollowings provided in the middle; a side support plate, which is a multi-bent sheet metal part, installed in the first groove and enclosing multiple vertical cavities with the side wall of the first groove; a side cross beam, with both ends respectively connected to the side walls of the corresponding first grooves, to ensure that the side frame has sufficient stiffness while achieving a flattened design.

[0013] In an optional embodiment of the present application, the side cross beam is a bent sheet metal structure, and the side cross beam is provided with multiple hollowings to ensure that while the side cross beam has sufficient stiffness, the weight of the side cross beam is reduced as much as possible.

[0014] In an optional embodiment of the present application, the side frame further includes a side cover plate, which covers the outside of the side wall plate, and the side cover plate is a perforated plate structure to provide shielding for the side frame while reducing the weight of the side cover plate as much as possible.

[0015] In an optional embodiment of the present application, the top frame includes: a top wall plate, which is a sheet metal part, with second grooves provided on both opposite sides and a hollowing provided in the middle; a top support plate, which is a multi-bent sheet metal part, installed in the second groove and enclosing multiple horizontal cavities with the side wall of the second groove to ensure that the top frame has sufficient stiffness.

[0016] In an optional embodiment of the present application, the top frame further includes an upper longitudinal beam, with both ends of the upper longitudinal beam respectively connected to the corresponding top support plates to improve the stiffness of the top frame.

[0017] In an optional embodiment of the present application, the upper longitudinal beam is a bent sheet metal part with a hollowing to ensure that while the upper longitudinal beam has sufficient stiffness, its weight is reduced.

[0018] In an optional embodiment of the present application, the bottom frame includes: a bottom wall plate, which is a sheet metal part, with third grooves provided on both opposite sides and a hollowing provided in the middle; a bottom support plate, which is a multi-bent sheet metal part, installed in the third groove and enclosing multiple horizontal cavities with the side wall of the third groove to ensure that the bottom frame has sufficient stiffness.

[0019] In an optional embodiment of the present application, the bottom frame further includes a bottom longitudinal beam, with both ends of the bottom longitudinal beam respectively connected to the corresponding bottom support plates, which can provide an installation platform for the corner rail while improving the stiffness of the bottom frame.

[0020] In an optional embodiment of the present application, both the upper diagonal brace and the lower diagonal brace are C-shaped bent sheet metal structures, and both the upper diagonal brace and the lower diagonal brace are provided with multiple hollowings to ensure that while the upper diagonal brace and the lower diagonal brace have sufficient stiffness, their weights are reduced as much as possible.

[0021] In an optional embodiment of the present application, it further includes an angle rail, which is installed on the bottom frame and is connected to the corresponding side frame through a width-reducing bracket.

[0022] In an optional embodiment of the present application, the angle rail includes: two side columns, which are multi-bend sheet metal parts and have multiple hollows in the middle; a bottom support installed at the bottom of the side column; a top support installed at the top of the side column; a lower cross beam, both ends of which are respectively connected to the corresponding lower parts of the side columns; and an upper cross beam, both ends of which are respectively connected to the corresponding upper parts of the side columns to ensure that the angle rail has sufficient rigidity.

[0023] In an optional embodiment of the present application, the width-reducing bracket is an I-shaped supporting sheet metal structure, and the width-reducing bracket is provided with multiple hollows to maximize the vertical laying area of ​​the cable while ensuring the front and rear bending moment stiffness.

[0024] In a second aspect, the present invention provides a seismic-resistant cabinet adapted for the above-mentioned seismic-resistant cabinet frame, which maximizes the available operating and maintenance area on the front of the cabinet while ensuring that the cabinet has sufficient lateral stiffness, thereby resolving the contradiction between the seismic performance of the cabinet and the internal available space.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The earthquake-resistant cabinet frame provided by the present invention comprises a side frame, a top frame, an upper diagonal brace, a bottom frame and a lower diagonal brace; the side frame is provided with two, and the side walls have a vertical cavity and a first mounting groove, so that the side frame has sufficient rigidity and can adopt a flat structure; the top frame is connected to the top of the two side frames, and the inner wall is provided with a second mounting groove, the upper diagonal brace is installed at each connecting corner of the side frame and the top frame, and the two side walls of each upper diagonal brace are respectively installed in the corresponding upper end of the first mounting groove and the second mounting groove, so as to connect the upper diagonal brace with the side frame and the top frame through an embedded structure, while the bottom frame is connected to the bottom of the two side frames, and the inner wall is provided with a third mounting groove, the lower diagonal brace is installed at each connecting corner of the side frame and the bottom frame, and the two side walls of each lower diagonal brace are respectively installed in the corresponding lower end of the first mounting groove and the third mounting groove, so as to connect the lower diagonal brace with the side frame and the bottom frame through an embedded structure, thereby optimizing the lateral rigidity of the cabinet while obtaining a minimized structural front projection area to improve operation and maintainability.

[0026] 2. The earthquake-resistant cabinet provided by the present invention is adapted to the above-mentioned earthquake-resistant cabinet frame, which maximizes the available operating and maintenance area on the front of the cabinet while ensuring that the cabinet has sufficient lateral rigidity, thereby resolving the contradiction between the earthquake-resistant performance of the cabinet and the internal available space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly describes the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope of the present invention. Those skilled in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0028] In the attached figure: Figure 1 A schematic diagram of the three-dimensional structure of a seismic cabinet frame provided in an embodiment of the present invention; Figure 2 A schematic diagram of the main structure of a seismic cabinet frame provided in an embodiment of the present invention; Figure 3 Schematic diagram of the exploded structure of the earthquake-resistant cabinet frame provided by an embodiment of the present invention (without the bottom frame); Figure 4 A schematic diagram of the exploded structure of the side frame provided in an embodiment of the present invention; Figure 5 A schematic diagram of the rear side perspective structure of a side frame provided by an embodiment of the present invention; Figure 6 A schematic diagram of the top frame structure provided by an embodiment of the present invention; Figure 7 A schematic diagram of the bottom frame structure provided by an embodiment of the present invention; Figure 8 A schematic diagram of a lower diagonal brace structure provided by an embodiment of the present invention; Figure 9 A schematic diagram of an upper diagonal brace structure provided in an embodiment of the present invention; Figure 10 A schematic diagram of the three-dimensional structure of an angle rail provided in an embodiment of the present invention; Figure 11 A schematic diagram of a top view of the angle rail structure provided by an embodiment of the present invention; Figure 12 A schematic structural diagram of a width-reducing bracket provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of the installation of the angle rail and width-reducing bracket provided in an embodiment of the present invention.

[0029] Reference numerals and corresponding component names in the accompanying drawings: 10-side frame, 11-first mounting groove, 12-side wall plate, 13-first groove, 14-side support plate, 15-side crossbeam, 17-end sealing plate; 20-top frame, 21-second mounting groove, 22-top wall plate, 23-second groove, 24-top support plate, 25-upper longitudinal beam; 30-upper oblique support; 40- bottom frame, 41- bottom wall plate, 42- third groove, 43- bottom support plate, 44- bottom longitudinal beam, 45- third mounting slot; 50-lower diagonal support; 60-angle rail, 61-side column, 62-bottom support, 63-top support, 64-lower beam, 65-upper beam, 70-Reduced width bracket. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0033] In the description of the embodiments of the present application, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0034] In the description of this application, unless otherwise specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0035] It should be noted that the main frame structure of existing cabinets generally adopts a sheet metal welding structure. Since the front and back of the cabinet are installation and operation areas, crossbeam structures are generally not installed. However, side crossbeams can be installed on both sides of the cabinet as installation interfaces and also increase the structural rigidity. As a result, existing cabinets have the problem that the rigidity in the left-right direction is less than the rigidity in the front-to-back direction. As a result, the fundamental frequency of conventional cabinets generally corresponds to the modal vibration shape in the left-right direction, and the fundamental frequency generally does not exceed 10Hz. The peak frequency of the earthquake floor response spectrum of a general nuclear power plant is generally concentrated in a frequency band not exceeding 10Hz. Therefore, the insufficient rigidity of the cabinet can easily cause a resonant response in the earthquake frequency band with the highest energy density, resulting in structural damage.

[0036] To improve the lateral rigidity of the cabinet, one possible solution is to increase the width of the columns on both sides to increase the lateral rigidity of the entire cabinet. This method can effectively improve the cabinet's fundamental frequency, but it also brings the problem of excessive column width. Given a certain total cabinet width, the cabinet spacing is reduced, resulting in obstruction of front and rear operating and observation space, affecting the cabinet's operability.

[0037] Another optional solution is: This method can also effectively improve the fundamental frequency of the cabinet, but the design of the diagonal brace also has technical contradictions. If the size is too large, it will affect the available width space in the cabinet and increase the stress at the column connection. If the size is too small, it cannot effectively strengthen the frame, and it is impossible to take into account both the operating and maintenance space and the structural performance.

[0038] In this regard, the inventor has innovatively designed the following technical solution, and the specific implementation solution of this application will be described in detail with reference to the accompanying drawings.

[0039] Example 1 Combine Figure 1 、 Figure 2 and Figure 3 This embodiment provides an earthquake-resistant cabinet frame, including: two side frames 10, each having a vertical cavity and a first mounting groove 11 on its side wall; a top frame 20 connected to the tops of the two side frames 10, with a second mounting groove 21 provided on its inner wall; an upper diagonal brace 30 installed at each connecting corner of the side frames 10 and the top frame 20, and both side walls of each upper diagonal brace 30 are respectively installed at the upper end of the corresponding first mounting groove 11 and in the second mounting groove 21; a bottom frame 40 connected to the bottoms of the two side frames 10, with a third mounting groove 45 provided on its inner wall; and a lower diagonal brace 50 installed at each connecting corner of the side frames 10 and the bottom frame 40, and both side walls of each lower diagonal brace 50 are respectively installed at the lower end of the corresponding first mounting groove 11 and in the third mounting groove 45.

[0040] It is understandable that this embodiment further includes an angle rail 60 , which is mounted on the bottom frame 40 , and is connected to the corresponding side frame 10 via a width-reducing bracket 70 .

[0041] Combine Figure 4 The side frame 10 includes: a side wall plate 12, which is a sheet metal part, with first grooves 13 provided on both sides of the long direction and multiple hollows in the middle; a side support plate 14, which is a multi-bend sheet metal part, installed in the first groove 13, and forms multiple vertical cavities with the side walls of the first groove 13; a side cross beam 15, both ends of which are respectively connected to the corresponding side walls of the first groove 13 to ensure that the side frame 10 has sufficient rigidity while achieving a flat design.

[0042] In this embodiment, the side cross beam 15 is a bent sheet metal structure, and the side cross beam 15 is provided with a plurality of hollows to ensure that the side cross beam 15 has sufficient rigidity while reducing the weight of the side cross beam 15 as much as possible.

[0043] Combine Figure 5 The side frame 10 further includes a side cover plate, which covers the outer side of the side wall plate 12 and is a perforated plate structure, so as to provide shielding for the side frame 10 while reducing the weight of the side cover plate as much as possible.

[0044] Specifically, in order to realize the flattened side frame 10 structure, the bending moment in the middle of the cabinet column is obtained according to the simulation calculation, so as to determine the minimum width of the column, and the width of the side wall plate 12 and the side support plate 14 is designed based on this size. The side wall plate 12 and the side support plate 14 are both M-shaped structures, in which the concave structure in the middle of the side wall plate 12 has a rectangular hollow for weight reduction and passing cables between cabinets, and the non-hollow position is used for welding and reinforcement with the side cross beam 15 and the cross beams at both ends; the cavities at both ends of the side wall plate 12 and the side support plate 14 are welded to form It forms a column structure with a double closed cavity in the middle; the side crossbeam 15 is a bent sheet metal structure, and the topology optimization is performed based on the normal pressure in the middle to form a multi-"X"-shaped hollow structure, and the two ends are welded to the middle of the side wall plate 12; the crossbeams at both ends are simple rectangular bent semi-closed cross-section beams, which are welded to the upper and lower ends of the side wall plate 12; the end sealing plate 17 is welded to the upper and lower ends of the side frame 10 to form a closed structure; the side cover plate is the surface covering at both ends of the cabinet frame, which mainly plays a shielding role, and adopts a perforated screen plate structure to reduce weight.

[0045] Combine Figure 6 The top frame 20 includes: a top wall plate 22, which is a sheet metal part, with second grooves 23 provided on two opposite sides and a hollow portion in the middle; a top support plate 24, which is a multi-bend sheet metal part (M-shaped), installed in the second groove 23, and together with the side walls of the second groove 23, form multiple transverse cavities to ensure that the top frame 20 has sufficient rigidity.

[0046] It is understandable that the top frame 20 further includes an upper longitudinal beam 25 , and both ends of the upper longitudinal beam 25 are respectively connected to the corresponding top support plates 24 to improve the rigidity of the top frame 20 .

[0047] Likewise, the upper longitudinal beam 25 is a hollow bent sheet metal part, so as to ensure that the upper longitudinal beam 25 has sufficient rigidity while reducing its weight.

[0048] Specifically, the top frame 20 is also a flat frame, comprising a top wall panel 22, a top support panel 24, and an upper longitudinal beam 25. The top wall panel 22 has a rectangular hollow in the middle for the top cable entry. The top wall panel 22 and the top support panel 24 form a crossbeam structure with a concave center and double enclosed cavities. The upper longitudinal beam 25 is an L-shaped bent structure, with trapezoidal and double triangular shock-absorbing hollows formed on the side to accommodate the load of the angle rail 60. It also has two figure-eight support ribs on the back. Typically, two upper longitudinal beams 25 are provided, screwed to the top support panel 24.

[0049] Combine Figure 7 The bottom frame 40 includes: a bottom wall plate 41, which is a sheet metal part, with third grooves 42 provided on two opposite sides and a hollow portion in the middle; a bottom support plate 43, which is a multi-bend sheet metal part (M-shaped), installed in the third groove 42, and together with the side walls of the third groove 42, form multiple transverse cavities to ensure that the bottom frame 40 has sufficient rigidity.

[0050] The bottom frame 40 further includes a bottom longitudinal beam 44 , both ends of which are connected to the corresponding bottom support plates 43 , thereby improving the rigidity of the bottom frame 40 and providing a mounting platform for the angle rail 60 .

[0051] Specifically, the bottom frame 40 includes a bottom wall plate 41, a bottom support plate 43 and a bottom longitudinal beam 44. The middle part of the bottom wall plate 41 is hollowed out by a rectangle. With the bottom incoming line, the bottom wall plate 41 and the two ends of the bottom support plate 43 form a cross-beam structure with a double closed cavity in the middle concave. The bottom longitudinal beam 44 longitudinally connects the concave groove of the bottom support plate 43 to serve as the bottom fixing plane of the angle rail 60.

[0052] Thus, the side frames 10, top frame 20, and bottom frame 40 are welded at the four corners through the double-enclosed-cavity column / beam structure with concave centers at both ends, ultimately forming a rectangular frame structure. This flattened structural design minimizes the cabinet's frontal projection area, maximizing the operating and maintenance area. Furthermore, in this embodiment, the lower diagonal braces 50 and upper diagonal braces 30 are welded to the eight corners of the cabinet frame, utilizing the concave centers of the double-enclosed-cavity columns / beams to embed them. This provides focused reinforcement at locations with weaker rigidity and significantly reduces the frontal projection compared to conventional diagonal brace 30 structures.

[0053] It can be understood that both the upper diagonal brace 30 and the lower diagonal brace 50 are C-shaped bent sheet metal structures, and both the upper diagonal brace 30 and the lower diagonal brace 50 are provided with a plurality of hollowings to ensure sufficient stiffness of the upper diagonal brace 30 and the lower diagonal brace 50 while minimizing their weight.

[0054] Combined with Figure 8 , in this embodiment, the lower diagonal brace 50 is a long bent structure with a right trapezoidal shape on the side, having rectangular and triangular hollowings, and a plurality of stiffness-reducing round holes at the top of the middle sheet metal edge to achieve a stiffness transition with the concave space in the middle of the column after welding; the function of the lower diagonal brace 50 is to strengthen the bending stiffness of the root of the column, having a lap length exceeding 30% along the height direction of the column of the side frame 10, and its length is relatively long compared to the diagonal brace 30 of a conventional cabinet, becoming a large-scale strengthening structure of the column by means of the concave space in the middle of the column, and achieving a stiffness gradient and weight reduction effect by means of the aforementioned hollowing structure.

[0055] Combined with Figure 9 , the upper diagonal brace 30 is a long bent structure with a right-angled shape on the side, a rounded corner transition in the middle, and rounded rectangular hollowings on both right-angled sides, and also having rounded hollowings near the lower end of the middle sheet metal edge; the function of the upper diagonal brace 30 is to strengthen the bending stiffness of the connection corner between the top of the column and the top frame 20, avoiding the occurrence of plastic hinges at the corner position, having a lap length exceeding 20% along the height direction of the column, and a lap length exceeding 30% along the width direction of the crossbeam. To reduce the obstruction of the front operation and maintenance surface, the side of the upper diagonal brace 30 is a right-angled structure with a middle arc transition, and its length is relatively long compared to the diagonal brace 30 of a conventional cabinet, and achieving a stiffness gradient and weight reduction effect by means of the aforementioned hollowing structure.

[0056] Combined with Figure 10-13 ]It can be understood that this embodiment further includes a corner rail 60, the corner rail 60 is installed on the bottom frame 40, and the corner rail 60 is connected to the corresponding side frame 10 through a width-reducing bracket 70.

[0057] Combined with Figure 12 , the corner rail 60 includes: two side columns 61, which are multi-bent sheet metal parts and are provided with a plurality of hollowings in the middle; a bottom support 62 installed at the bottom of the side column 61; a top support 63 installed at the top of the side column 61; a lower crossbeam 64, the two ends of which are respectively connected to the lower parts of the corresponding side columns 61; and an upper crossbeam 65, the two ends of which are respectively connected to the upper parts of the corresponding side columns 61 to ensure sufficient stiffness of the corner rail 60.

[0058] Continuing to combine Figure 11In this embodiment, the angle rail 60 includes a side column 61, a bottom support 62, a top support 63, a lower crossbeam 64 and an upper crossbeam 65, which are an integrally welded structure. The side column 61 is also a flat structure with a small front projection width. It is a double "W" thick plate (greater than 4mm) bent sheet metal structure. Under the premise of flatness, the structural rigidity is ensured by the thickness of the sheet metal and the aforementioned bending; the three concave spaces not only strengthen the lateral bending rigidity, but can also be used as wire ducts. The two ends of the side column 61 are welded square hole bars for installing standard 19-inch equipment and brackets; in addition, while the side column 61 ensures the maximization of lateral rigidity, there are multiple hollow structures with topological optimization calculations on the thick steel plate based on the weight reduction requirements, which are mainly reflected in the following: The upper and lower ends of the middle concave part are hollowed out, and the upper, lower and middle four sections of the concave docking positions on both sides are evenly hollowed out; the bottom support 62 is an "L"-shaped bending structure, and the main surface is trapezoidal. It is welded to the bottom of the side column 61 as a rigidity enhancement. It is also designed with a hollow structure with an arch in the middle and polygons on both sides based on maximizing lateral rigidity and reducing weight; the top support 63 is an "L"-shaped bending structure, which is welded to the top of the side column 61 for reinforcement, and provides a screw connection interface with the upper longitudinal beam 25; the lower cross beam 64 and the upper cross beam 65 mainly provide lateral connection and support at the upper and lower parts of the angle rail 60, so that the angle rail 60 forms an integral structure. At the same time, the upper cross beam 65 can play a lateral bending resistance effect and enhance the lateral rigidity of the angle rail 60.

[0059] Combine Figure 12 The width-reducing bracket 70 is an I-shaped supporting sheet metal structure, and the width-reducing bracket 70 is provided with a plurality of hollows to maximize the vertical laying area of ​​the cables while ensuring the front and rear bending moment stiffness.

[0060] Typically, the width-reducing bracket 70 is formed by splicing and welding two side supports and two front and rear supports. Viewed from the top, it is an I-shaped support sheet metal structure, which not only ensures the rigidity against the front and rear bending moments but also reduces the space occupied in the front and rear directions of the cabinet. The concave area can be used for the vertical laying of cables; the side supports are bracket-shaped bent sheet metal structures with a long polygonal hollow in the middle of the main surface and a trapezoidal hollow in the middle of the upper and lower bending positions; the front and rear supports are double-folded trapezoidal sheet metal structures with a rectangular hollow in the middle of the main surface and rectangular hollows on the two oblique flanges; the overall structure of the width-reducing bracket 70 is still topologically optimized based on the principles of maximizing lateral and upper and lower bending rigidity and reducing weight to form the above structure.

[0061] In summary, the earthquake-resistant cabinet frame provided in this embodiment includes a side frame 10, a top frame 20, an upper diagonal brace 30, a bottom frame 40, a lower diagonal brace 50, an angle rail 60 and a width-reducing bracket 70; the side frame 10 is provided with two, and the side wall has a vertical cavity and a first mounting groove 11, so that the side frame 10 has sufficient rigidity and can adopt a flat structure; the top frame 20 is connected to the top of the two side frames 10, and the inner wall is provided with a second mounting groove 21, the upper diagonal brace 30 is installed at each connecting corner of the side frame 10 and the top frame 20, and each side wall of each upper diagonal brace 30 has a vertical cavity and a first mounting groove 11, so that the side frame 10 has sufficient rigidity and can adopt a flat structure; the top frame 20 is connected to the top of the two side frames 10, and the inner wall is provided with a second mounting groove 21, and the upper diagonal brace 30 is installed at each connecting corner of the side frame 10 and the top frame 20, and the side walls of each upper diagonal brace 30 have a vertical cavity and a first mounting groove 11, so that the side frame 10 has sufficient rigidity and can adopt a flat structure They are respectively installed in the corresponding upper ends of the first mounting grooves 11 and the second mounting grooves 21, so as to connect the upper diagonal brace 30 with the side frames 10 and the top frame 20 through an embedded structure. At the same time, the bottom frame 40 is connected to the bottom of the two side frames 10, and the inner wall is provided with a third mounting groove 45. The lower diagonal brace 50 is installed at each connecting corner of the side frame 10 and the bottom frame 40, and the two side walls of each lower diagonal brace 50 are respectively installed in the corresponding lower ends of the first mounting grooves 11 and the third mounting grooves 45, so as to connect the lower diagonal brace 50 with the side frame 10 and the bottom frame 40 through an embedded structure.

[0062] In summary, this embodiment relies on the outer frame formed by the side frames 10, top frame 20, bottom frame 40, lower diagonal braces 50, and upper diagonal braces 30, and the inner frame formed by the angle rails 60. Finally, these are connected by width-reducing brackets 70 to form an overall cabinet frame structure with a small frontal projection and high rigidity. This minimizes the frontal projection area of ​​the structure to improve operability and maintainability while optimizing the cabinet's lateral rigidity.

[0063] That is to say, this embodiment can be applied to nuclear power instrumentation and control system cabinets. It is based on a flat outer frame and an angled inner frame to obtain a minimized structural front projection area to improve operability and maintainability. At the same time, the embedded upper and lower diagonal bracing 50 structures are combined with the concave double-enclosed column / beam structure of the outer frame, as well as the double "M"-shaped angle rail 60 column section, which significantly optimizes the lateral high stiffness of the cabinet. Finally, with the help of a topology optimization algorithm, unnecessary materials are removed to reduce weight, and a new cabinet frame structure that takes into account high structural stiffness and maximized internal space is obtained.

[0064] Example 2 Combine Figure 2 and Figure 13 This embodiment provides a seismic cabinet, which is adapted to the seismic cabinet frame described in Example 1. While maximizing the available operating and maintenance area on the front of the cabinet, it ensures that the cabinet has sufficient lateral rigidity, thus resolving the contradiction between the seismic performance of the cabinet and the available internal space. The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A seismic cabinet frame, characterized in that: Comprising: Side frames (10), two of them are provided, and the side walls have vertical cavities and first mounting grooves (11); Top frame (20), connected to the tops of the two side frames (10), and the inner wall is provided with a second mounting groove (21); Upper diagonal braces (30), installed at the connecting corners of the side frames (10) and the top frame (20), and both side walls of each upper diagonal brace (30) are respectively installed in the upper end of the corresponding first mounting groove (11) and the second mounting groove (21); Bottom frame (40), connected to the bottoms of the two side frames (10), and the inner wall is provided with a third mounting groove (45); Lower diagonal braces (50), installed at the connecting corners of the side frames (10) and the bottom frame (40), and both side walls of each lower diagonal brace (50) are respectively installed in the lower end of the corresponding first mounting groove (11) and the third mounting groove (45).

2. The earthquake-resistant cabinet frame according to claim 1, characterized in that: The side frame (10) includes: Side wall plates (12), which are sheet metal parts, with first grooves (13) provided on both sides in the long direction and multiple hollowings in the middle; Side brace plates (14), which are multi-folded sheet metal parts, installed in the first grooves (13) and enclosing multiple vertical cavities with the side walls of the first grooves (13); Side cross beams (15), with both ends respectively connected to the side walls of the corresponding first grooves (13).

3. The earthquake-resistant cabinet frame according to claim 2, characterized in that: The side cross beam (15) is a bent sheet metal structure, and the side cross beam (15) is provided with multiple hollowings.

4. The earthquake-resistant cabinet frame according to claim 2, characterized in that: The side frame (10) further includes side covers, the side covers cover the outside of the side wall plates (12), and the side covers are hole plate structures.

5. The earthquake-resistant cabinet frame according to claim 1, characterized in that: The top frame (20) includes: Top wall plates (22), which are sheet metal parts, with second grooves (23) provided on both opposite sides and a hollowing in the middle; Top brace plates (24), which are multi-folded sheet metal parts, installed in the second grooves (23) and enclosing multiple horizontal cavities with the side walls of the second grooves (23).

6. The earthquake-resistant cabinet frame according to claim 5, characterized in that: The top frame (20) further includes upper longitudinal beams (25), and both ends of the upper longitudinal beams (25) are respectively connected to the corresponding top brace plates (24).

7. The earthquake-resistant cabinet frame according to claim 6, characterized in that: The upper longitudinal beam (25) is a bent sheet metal part with hollowings.

8. The earthquake-resistant cabinet frame according to claim 1, characterized in that: The bottom frame (40) includes: Bottom wall plates (41), which are sheet metal parts, with third grooves (42) provided on both opposite sides and a hollowing in the middle; Bottom brace plates (43), which are multi-folded sheet metal parts, installed in the third grooves (42) and enclosing multiple horizontal cavities with the side walls of the third grooves (42).

9. The earthquake-resistant cabinet frame according to claim 8, characterized in that: The bottom frame (40) further includes bottom longitudinal beams (44), and both ends of the bottom longitudinal beams (44) are respectively connected to the corresponding bottom brace plates (43).

10. The earthquake-resistant cabinet frame according to claim 1, characterized in that: Both the upper diagonal braces (30) and the lower diagonal braces (50) are U-shaped bent sheet metal structures, and both the upper diagonal braces (30) and the lower diagonal braces (50) are provided with multiple hollowings.

11. The earthquake-resistant cabinet frame according to any one of claims 1 to 10, characterized in that: It further includes corner rails (60), the corner rails (60) are installed on the bottom frame (40), and the corner rails (60) are connected to the corresponding side frames (10) through width-reducing brackets (70).

12. The earthquake-resistant cabinet frame according to claim 11, characterized in that: The corner rail (60) includes: There are two side columns (61), which are multi-bend sheet metal parts and have multiple hollows in the middle; A bottom support (62) is mounted on the bottom of the side column (61); A top support (63) mounted on the top of the side column (61); A lower crossbeam (64), both ends of which are connected to the lower portions of the corresponding side columns (61); The upper crossbeam (65) has two ends connected to the upper parts of the corresponding side columns (61).

13. The earthquake-resistant cabinet frame according to claim 11, characterized in that: The width-reducing bracket (70) is an I-shaped supporting sheet metal structure, and the width-reducing bracket (70) is provided with a plurality of hollows.

14. A seismic cabinet, characterized in that: Adapted to the earthquake-resistant cabinet frame according to any one of claims 1 to 8.

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