A connection device for nine-fold cabinets and cabinets

Abstract

The present invention provides a connection device for connecting nine-fold cabinets, including an inner connecting member and an outer connecting member, wherein the inner connecting member connects the inner surfaces of the adjacent supporting prisms of the first nine-fold cabinet and the second nine-fold cabinet, and the outer connecting member connects the outer surfaces of the adjacent supporting prisms of the first nine-fold cabinet and the second nine-fold cabinet. The inner connecting member is placed inside the first nine-fold cabinet and the second nine-fold cabinet, and the outer connecting member is placed outside the first nine-fold cabinet and the second nine-fold cabinet, and the inner connecting member and the outer connecting member are arranged opposite to each other. The present invention has a simple structure and is easy to operate. By using the inner connecting member and the outer connecting member in pairs, the firmness of the adjacent nine-fold cabinets is improved, and the defects of the connection columns of the ordinary profile cabinets being easy to fatigue and high cost are solved. The front and rear connection method of the profile frame cabinet is realized, which has a wide range of applications and strong practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a connection device for connecting nine-bend cabinets. Background Art

[0002] The nine-bend cabinet is a cabinet made of nine-bend profiles. The cabinet body is generally in the form of a rectangular parallelepiped with twelve edges to support the cabinet body. The nine-bend profile refers to the steel being bent nine times on a bending machine to form a Figure 1 The nine-fold bend is a vivid application of geometry in industrial manufacturing, providing a cheap and practical technical solution for the skeleton of the load-bearing cabinet, making a great contribution to the development of industrial automation.

[0003] At present, nine-fold bend cabinets are widely used in wind power industry control cabinets. Most wind power industry control cabinets use frame profiles to connect cabinets in the left and right directions to increase the space inside the cabinet. When the control cabinet is subject to special working conditions or there is insufficient space in the cabin, it is particularly important to use frame profiles to connect cabinets in the front and back directions.

[0004] At present, when wind power industry control cabinets are connected, they are mostly connected by connecting columns. However, the connecting columns cannot ensure that the frame profiles fit tightly. After the unit is in continuous operation, the connecting columns are prone to fatigue damage, causing equipment safety hazards. In addition, the processing method of connecting columns is mostly machining, and its surface flatness requires high precision, and the batch production cost is high. In addition, the surface treatment of connecting columns is mostly cold galvanizing, which is easy to corrode and cannot meet the equipment requirements of the wind power industry. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a connection device, which is particularly suitable for the assembly and disassembly of control cabinets in the wind power industry. It has a simple structure and is easy to operate. It can meet the reliability of the nine-bend profile frame cabinet assembly and disassembly, especially in special operating conditions and narrow spaces. It can also easily assemble and disassemble cabinets. It has low production cost and a wide range of applications. It is a connection device for the assembly and disassembly of nine-bend cabinets.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a connection device used for nine-fold cabinets, including an inner connecting member and an outer connecting member, the inner connecting member connects the inner surfaces of adjacent supporting prisms of a first nine-fold cabinet and a second nine-fold cabinet, the outer connecting member connects the outer surfaces of adjacent supporting prisms of the first nine-fold cabinet and the second nine-fold cabinet, the inner connecting member is placed inside the first nine-fold cabinet and the second nine-fold cabinet, the outer connecting member is placed outside the first nine-fold cabinet and the second nine-fold cabinet, and the inner connecting member and the outer connecting member are arranged opposite to each other.

[0007] Furthermore, the inner connecting member includes an inner connecting plate and an inner connecting screw, and the inner connecting screw fixes the inner connecting plate to the inside of the first nine-fold cabinet and the second nine-fold cabinet.

[0008] Furthermore, the inner connecting plate includes a first inner plate, a second inner plate and a third inner plate, the first inner plate and the third inner plate are respectively vertically connected to the two vertical side surfaces of the second inner plate, the first inner plate and the third inner plate are arranged in parallel, the first inner plate, the second inner plate and the third inner plate are arranged in a U-shape in cross-section, and the inner connecting plate is provided with an inner mounting hole.

[0009] Furthermore, an inner limit block is provided on the second inner plate, and the inner limit block includes a first inner limit block and a second inner limit block. When the inner connecting plate contacts the interior of the first nine-fold bend cabinet and the second nine-fold bend cabinet, the first inner limit block is inserted into the square through hole of the supporting prism of the first nine-fold bend cabinet, and the second inner limit block is inserted into the square through hole of the supporting prism of the second nine-fold bend cabinet.

[0010] Furthermore, the inner limit block is formed by stamping and bending the second inner plate, and the inner limit block is arranged at an acute angle to the second inner plate.

[0011] Furthermore, there are multiple inner mounting holes, and the multiple inner mounting holes are respectively disposed on the first inner plate, the second inner plate and the third inner plate, and the first inner plate and the third inner plate are respectively provided with square through holes, and the square through holes have the same shape as the square through holes of the supporting prisms.

[0012] Furthermore, the inner connecting plate also includes an inner top plate, which is connected to the horizontal side plate at the top of the second inner plate, and the inner top plate is arranged at an angle to the second inner plate.

[0013] Furthermore, the outer connecting member includes an outer connecting plate and an outer connecting screw, and the outer connecting screw fixes the outer connecting plate to the outer surfaces of the first nine-fold bend cabinet and the second nine-fold bend cabinet.

[0014] Further, the outer connecting plate includes a first outer plate, a second outer plate, a third outer plate, a fourth outer plate, a fifth outer plate, a sixth outer plate, a seventh outer plate, an eighth outer plate and a ninth outer plate, the first outer plate and the third outer plate are respectively vertically connected to the two vertical side surfaces of the second outer plate, the first outer plate is arranged in parallel with the third outer plate, the first outer plate, the second outer plate and the third outer plate are arranged in a U-shaped cross-section, the fourth outer plate and the sixth outer plate are respectively vertically connected to the two vertical side surfaces of the fifth outer plate, the fourth outer plate is arranged in parallel with the sixth outer plate, the fourth outer plate, the fifth outer plate and the The sixth outer plate is U-shaped in cross section, the seventh outer plate and the ninth outer plate are respectively vertically connected to the two vertical side surfaces of the eighth outer plate, the seventh outer plate is parallel to the ninth outer plate, the seventh outer plate, the eighth outer plate and the ninth outer plate are U-shaped in cross section, the third outer plate is vertically connected to the fourth outer plate, the sixth outer plate is vertically connected to the seventh outer plate, the first outer plate, the second outer plate, the third outer plate, the fourth outer plate, the fifth outer plate, the sixth outer plate, the seventh outer plate, the eighth outer plate and the ninth outer plate are connected in sequence with a "convex" shape in cross section.

[0015] Furthermore, the fifth outer plate is provided with an outer limiting block, and the fourth outer plate and the sixth outer plate are both provided with outer mounting holes, and there are multiple outer mounting holes.

[0016] The advantages and positive effects of the present invention are:

[0017] 1. The present invention has a simple structure and is easy to operate. The inner and outer connecting pieces are used in pairs to improve the firmness of the adjacent nine-bend cabinets, solving the problems of fatigue and high cost of the connecting columns of ordinary profile cabinets. The front and rear connection of the profile frame cabinet is realized, which has a wide range of applications and strong practicality.

[0018] 2. The inner connecting plate of the present invention can be quickly inserted into the square through-hole of the supporting prism of the nine-fold cabinet through its own limiting block, so as to quickly splice two adjacent nine-fold cabinets. The inner connecting screws are attached and fastened to the surface of the supporting prism of the nine-fold cabinet through the inner mounting holes reserved on the inner connecting plate, so as to play the role of inner fastening. The outer connecting plate quickly slides in along the path of the outer surfaces of the supporting prisms of the two groups of adjacent nine-fold cabinets through its own molding, and quickly positions the two adjacent supporting prisms of the two groups of nine-fold cabinets together, which plays a good fitting role to ensure the stability of the structure, thereby ensuring the safe operation of the Yuanqi devices in the nine-fold cabinet.

[0019] 3. The inner and outer connecting plates of the present invention are formed by processing the leftovers of stainless steel plates, which has low requirements on equipment, simple structure, convenient operation, low production cost, and batch production. It avoids the surface reprocessing after processing, thereby avoiding the environmental pollution caused by post-processing, and plays an anti-corrosion role under special working conditions on site, saving energy and protecting the environment.

[0020] 4. The inner and outer connecting plates of the present invention have high structural strength due to their own bending characteristics, thereby reducing the impact of irregular vibration after the unit is running and playing a role in strengthening the strength of the supporting structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the nine-bend profile structure of an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0023] Figure 3 Embodiment of the present invention Figure 2 A partial enlarged view of the .

[0024] Figure 4 It is a cross-sectional view of the overall structure of an embodiment of the present invention.

[0025] Figure 5 , Figure 6 It is a schematic diagram of the structure of the inner connecting plate of an embodiment of the present invention.

[0026] Figure 7 , Figure 8 It is a schematic diagram of the structure of the outer connecting plate of an embodiment of the present invention.

[0027] In the figure:

[0028] 1. Inner connecting plate 2. Support prism 3. Outer connecting plate

[0029] 4. Outer connecting screws 5. Inner connecting screws 6. First nine-fold bend cabinet

[0030] 7. 29th bending cabinet 8. Outer connecting piece 9. Inner connecting piece

[0031] 10. Square through hole 11. Inner mounting hole 12. First inner plate

[0032] 13. Inner top plate 14. Third inner side plate 15. Inner limit block

[0033] 16, second inner plate 17, first inner limit block 18, second inner limit block

[0034] 19, first outer plate 20, second outer plate 21, third outer plate

[0035] 22, fourth outer plate 23, fifth outer plate 24, sixth outer plate

[0036] 25, seventh outer plate 26, eighth outer plate 27, ninth outer plate

[0037] 28, outer limit block 29, outer mounting hole 30, first outer limit block

[0038] 31. Second outer limiting block 32. Cavity. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0043] like Figure 2-Figure 4As shown, a connection device for connecting nine-bend cabinets includes an inner connection member 9 and an outer connection member 8. The inner connection member 9 connects the inner surfaces of the adjacent supporting prisms 2 of the first nine-bend cabinet 6 and the second nine-bend cabinet 7, and the outer connection member 8 connects the outer surfaces of the adjacent supporting prisms 2 of the first nine-bend cabinet 6 and the second nine-bend cabinet 7. The inner connection member 9 is placed inside the first nine-bend cabinet 6 and the second nine-bend cabinet 7, and the outer connection member 8 is placed outside the first nine-bend cabinet 6 and the second nine-bend cabinet 7, and the inner connection member 9 and the outer connection member 8 are arranged opposite to each other.

[0044] This embodiment uses the inner connecting piece 9 and the outer connecting piece 8 in pairs, which improves the firmness of the adjacent nine-bend cabinets, solves the defects of the common profile cabinet connection column being easy to fatigue and high cost, and realizes the front and rear connection of the profile frame cabinet, which has a wide range of applications and strong practicality.

[0045] like Figure 3 As shown, the inner connecting member 9 includes an inner connecting plate 1 and inner connecting screws 5 , and the inner connecting screws 5 fix the inner connecting plate 1 to the inside of the first nine-bend cabinet 6 and the second nine-bend cabinet 7 .

[0046] The inner connecting plate 1 of this embodiment can be quickly inserted into the square through hole 10 of the nine-fold cabinet supporting prism 2 through its own limit block, so as to quickly splice two adjacent nine-fold cabinets. The inner connecting screws 5 are inserted through the inner mounting holes 11 reserved on the inner connecting plate 1 to fit and fasten it to the surface of the nine-fold cabinet supporting prism 2, thereby playing an inner fastening role.

[0047] Specifically, Figure 4-Figure 6 As shown, the inner connecting plate 1 includes a first inner plate 12, a second inner plate 16 and a third inner plate 14, and the first inner plate 12 and the third inner plate 14 are respectively vertically connected to two vertical side surfaces of the second inner plate 16. The first inner plate 12 is arranged parallel to the third inner plate 14, and the first inner plate 12, the second inner plate 16 and the third inner plate 14 are arranged in a U-shaped cross section, and an inner mounting hole 11 is provided on the inner connecting plate 1.

[0048] There are multiple inner mounting holes 11, which are respectively disposed on the first inner plate 12, the second inner plate 16 and the third inner plate 14. The first inner plate 12 and the third inner plate 14 are respectively provided with square through holes 10, which are the same in shape as the square through holes 10 of the supporting prism 2.

[0049] The second inner plate 16 is provided with an inner limit block 15, and the inner limit block 15 includes a first inner limit block 17 and a second inner limit block 18. When the inner connecting plate 1 contacts the inside of the first nine-fold cabinet 6 and the second nine-fold cabinet 7, the first inner limit block 17 is inserted into the square through hole 10 of the supporting prism 2 of the first nine-fold cabinet 6, and the second inner limit block 18 is inserted into the square through hole 10 of the supporting prism 2 of the second nine-fold cabinet 7.

[0050] The inner limit block 15 can be of various structures as long as the above-mentioned functions are achieved. Specifically, the inner limit block 15 provided in this embodiment is formed by stamping and bending the second inner plate 16. The inner limit block 15 is arranged at an acute angle to the second inner plate 16. The shape of the inner limit block 15 is square, and the size of the inner limit block 15 is smaller than the square through hole 10 of the supporting prism 2.

[0051] The inner mounting holes 11 on the second inner plate 16 are respectively placed above the first inner limit block 17 and the second inner limit block 18. The inner mounting holes 11 on the first inner plate 12 and the third inner plate 14 are respectively placed in the gaps between the square through holes 10.

[0052] Preferably, the inner connecting plate 1 further comprises an inner top plate 13, which is connected to the horizontal side plate at the top of the second inner plate 16, and the inner top plate 13 is set at an angle to the second inner plate 16. When in use, the operator holds the inner top plate 13, and slides the first inner limit block 17 and the second inner limit block 18 into the square through hole 10 of the first nine-fold cabinet 6 supporting prism 2 and the square through hole 10 of the second nine-fold cabinet 7 supporting prism 2, respectively, for convenient fixed installation.

[0053] like Figure 3 As shown, the outer connecting member 8 includes an outer connecting plate 3 and an outer connecting screw 4, and the outer connecting screw 4 fixes the outer connecting plate 3 to the outer surfaces of the first nine-bend cabinet 6 and the second nine-bend cabinet 7.

[0054] The outer connecting plate 3 of this embodiment slides quickly along the path of the outer surface of the two groups of adjacent nine-fold bend cabinet support prisms 2 through its own molding, and quickly positions the two adjacent support prisms 2 of the two groups of nine-fold bend cabinets together, which plays a good fitting role to ensure the stability of the structure, thereby ensuring the safe operation of the Yuanqi devices in the nine-fold bend cabinet.

[0055] Specifically, Figure 4 , Figure 7 , Figure 8As shown, the outer connecting plate 3 includes a first outer plate 19, a second outer plate 20, a third outer plate 21, a fourth outer plate 22, a fifth outer plate 23, a sixth outer plate 24, a seventh outer plate 25, an eighth outer plate 26 and a ninth outer plate 27. The first outer plate 19 and the third outer plate 21 are respectively vertically connected to the two vertical side surfaces of the second outer plate 20, the first outer plate 19 is arranged parallel to the third outer plate 21, and the first outer plate 19, the second outer plate 20 and the third outer plate 21 are arranged in a U-shaped cross section. The fourth outer plate 22 and the sixth outer plate 24 are respectively vertically connected to the two vertical side surfaces of the fifth outer plate 23, the fourth outer plate 22 is arranged parallel to the sixth outer plate 24, and the fourth outer plate 22, the fifth outer plate 23 and the sixth outer plate 24 are arranged in a U-shaped cross section. The seventh outer plate 25 and the ninth outer plate 27 are respectively connected vertically to the two vertical sides of the eighth outer plate 26, the seventh outer plate 25 is arranged in parallel with the ninth outer plate 27, and the seventh outer plate 25, the eighth outer plate 26 and the ninth outer plate 27 are arranged in a U-shaped cross section. The third outer plate 21 is connected vertically to the fourth outer plate 22, and the sixth outer plate 24 is connected vertically to the seventh outer plate 25. The first outer plate 19, the second outer plate 20, the third outer plate 21, the fourth outer plate 22, the fifth outer plate 23, the sixth outer plate 24, the seventh outer plate 25, the eighth outer plate 26 and the ninth outer plate 27 are connected in sequence and arranged in a "convex" shape.

[0056] The outer connecting plate 3 is provided with outer mounting holes 29 , which are disposed on the fourth outer plate 22 and the sixth outer plate 24 . There are multiple outer mounting holes 29 , which are evenly distributed on the fourth outer plate 22 and the sixth outer plate 24 .

[0057] The fifth outer plate 23 is provided with an outer limit block 28. The outer limit block 28 provided in this embodiment is formed by stamping and bending the fifth outer plate 23. The outer limit block 28 is set at an acute angle with the fifth outer plate 23. The outer limit block 28 includes a first outer limit block 30 and a second outer limit block 31. The first outer limit block 30 is symmetrically arranged with the second outer limit block 31. When in use, the operator holds the outer limit block 28 and slides the outer connecting plate 3 into the cavity 32 formed by the connection of the first nine-fold cabinet 6 supporting prism 2 and the second nine-fold cabinet 7 supporting prism 2, which is convenient for fixed installation.

[0058] The inner connecting plate 1 and the outer connecting plate 3 of this embodiment are formed by processing the leftover stainless steel plates, which has low requirements on equipment, simple structure, convenient operation, low production cost, and mass production, etc. It avoids the surface reprocessing after processing, thereby avoiding the environmental pollution caused by post-processing, and plays an anti-corrosion role under special working conditions on site, saving energy and protecting the environment.

[0059] The working principle of the present invention is:

[0060] Align the first nine-fold cabinet 6 and the second nine-fold cabinet 7 in parallel, so that the first nine-fold cabinet 6 supporting prism 2 and the second nine-fold cabinet 7 supporting prism 2 are in contact. The operator holds the inner top plate 13, slides the first inner limit block 17 and the second inner limit block 18 into the square through hole 10 of the first nine-fold cabinet 6 supporting prism 2 and the second nine-fold cabinet 7 supporting prism 2 respectively, and fixes and installs them with the inner connecting screws 5. The operator holds the outer limit block 28, slides the outer connecting plate 3 into the cavity 32 formed by the connection of the first nine-fold cabinet 6 supporting prism 2 and the second nine-fold cabinet 7 supporting prism 2, and fixes and installs them with the outer connecting screws 4.

[0061] The inner connecting plate 1 and the outer connecting plate 3 have high structural strength due to their own bending forming characteristics, thereby reducing the impact of irregular vibration after the unit is running and playing a role in strengthening the strength of the supporting structure.

[0062] The advantages and positive effects of the present invention are:

[0063] 1. The present invention has a simple structure and is easy to operate. The inner and outer connecting pieces are used in pairs to improve the firmness of the adjacent nine-bend cabinets, solving the problems of fatigue and high cost of the connecting columns of ordinary profile cabinets. The front and rear connection of the profile frame cabinet is realized, which has a wide range of applications and strong practicality.

[0064] 2. The inner connecting plate of the present invention can be quickly inserted into the square through-hole of the supporting prism of the nine-fold cabinet through its own limiting block, so as to quickly splice two adjacent nine-fold cabinets. The inner connecting screws are attached and fastened to the surface of the supporting prism of the nine-fold cabinet through the inner mounting holes reserved on the inner connecting plate, so as to play the role of inner fastening. The outer connecting plate quickly slides in along the path of the outer surfaces of the supporting prisms of the two groups of adjacent nine-fold cabinets through its own molding, and quickly positions the two adjacent supporting prisms of the two groups of nine-fold cabinets together, which plays a good fitting role to ensure the stability of the structure, thereby ensuring the safe operation of the Yuanqi devices in the nine-fold cabinet.

[0065] 3. The inner and outer connecting plates of the present invention are formed by processing the leftovers of stainless steel plates, which has low requirements on equipment, simple structure, convenient operation, low production cost, and batch production. It avoids the surface reprocessing after processing, thereby avoiding the environmental pollution caused by post-processing, and plays an anti-corrosion role under special working conditions on site, saving energy and protecting the environment.

[0066] 4. The inner and outer connecting plates of the present invention have high structural strength due to their own bending characteristics, thereby reducing the impact of irregular vibration after the unit is running and playing a role in strengthening the strength of the supporting structure.

[0067] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A connection device for nine-bend cabinets, characterized in that: The invention comprises an inner connecting piece and an outer connecting piece, wherein the inner connecting piece connects the inner surfaces of the adjacent supporting prisms of the first nine-fold bend cabinet and the second nine-fold bend cabinet, the inner connecting piece comprises an inner connecting plate and an inner connecting screw, the inner connecting screw fixes the inner connecting plate to the inside of the first nine-fold bend cabinet and the second nine-fold bend cabinet, the inner connecting plate comprises a first inner plate, a second inner plate and a third inner plate, the first inner plate and the third inner plate are respectively vertically connected to the two vertical side surfaces of the second inner plate, the first inner plate and the third inner plate are arranged in parallel, the cross-sections of the first inner plate, the second inner plate and the third inner plate are arranged in a U-shape, the inner connecting plate is provided with an inner mounting hole, and the second inner An inner limit block is provided on the side panel, and the inner limit block includes a first inner limit block and a second inner limit block. When the inner connecting plate contacts the inside of the first nine-fold cabinet and the second nine-fold cabinet, the first inner limit block is inserted into the square through hole of the supporting prism of the first nine-fold cabinet, and the second inner limit block is inserted into the square through hole of the supporting prism of the second nine-fold cabinet. The outer connecting piece connects the outer surfaces of the adjacent supporting prisms of the first nine-fold cabinet and the second nine-fold cabinet, the inner connecting piece is placed inside the first nine-fold cabinet and the second nine-fold cabinet, and the outer connecting piece is placed outside the first nine-fold cabinet and the second nine-fold cabinet, and the inner connecting piece and the outer connecting piece are arranged opposite to each other.

2. A connection device for nine-bend cabinets according to claim 1, characterized in that: The inner limit block is formed by stamping and bending the second inner plate, and the inner limit block and the second inner plate are arranged at an acute angle.

3. A connection device for nine-bend cabinets according to claim 1 or 2, characterized in that: There are multiple inner mounting holes, which are respectively disposed on the first inner plate, the second inner plate and the third inner plate. The first inner plate and the third inner plate are respectively provided with square through holes, which have the same shape as the square through holes of the supporting prisms.

4. A connection device for nine-bend cabinets according to claim 1 or 2, characterized in that: The inner connecting plate further comprises an inner top plate, which is connected to the horizontal side plate at the top of the second inner plate, and the inner top plate is arranged at an angle to the second inner plate.

5. A connection device for nine-bend cabinets according to claim 1 or 2, characterized in that: The outer connecting member includes an outer connecting plate and an outer connecting screw, and the outer connecting screw fixes the outer connecting plate to the outer surfaces of the first nine-fold bend cabinet and the second nine-fold bend cabinet.

6. The connection device for nine-bend cabinets according to claim 5 is characterized in that: The outer connecting plate includes a first outer plate, a second outer plate, a third outer plate, a fourth outer plate, a fifth outer plate, a sixth outer plate, a seventh outer plate, an eighth outer plate and a ninth outer plate, the first outer plate and the third outer plate are respectively vertically connected to two vertical side surfaces of the second outer plate, the first outer plate is arranged in parallel with the third outer plate, the first outer plate, the second outer plate and the third outer plate are arranged in a U-shaped cross-section, the fourth outer plate and the sixth outer plate are respectively vertically connected to two vertical side surfaces of the fifth outer plate, the fourth outer plate is arranged in parallel with the sixth outer plate, the fourth outer plate, the fifth outer plate and the sixth outer plate are respectively vertically connected to two vertical side surfaces of the fifth outer plate, The cross-section of the outer plate is U-shaped, the seventh outer plate and the ninth outer plate are respectively vertically connected to the two vertical side surfaces of the eighth outer plate, the seventh outer plate is parallel to the ninth outer plate, the seventh outer plate, the eighth outer plate and the ninth outer plate are U-shaped in cross-section, the third outer plate is vertically connected to the fourth outer plate, the sixth outer plate is vertically connected to the seventh outer plate, the first outer plate, the second outer plate, the third outer plate, the fourth outer plate, the fifth outer plate, the sixth outer plate, the seventh outer plate, the eighth outer plate and the ninth outer plate are connected in sequence with a "convex" cross-section.

7. A connection device for nine-bend cabinets according to claim 6, characterized in that: The fifth outer plate is provided with an outer limiting block, and the fourth outer plate and the sixth outer plate are both provided with outer mounting holes, and there are a plurality of outer mounting holes.

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