CN112399766A

CN112399766A - Duplex cavity cabinet profile with multiple mounting surfaces and corresponding rack thereof

Info

Publication number: CN112399766A
Application number: CN202011183345.7A
Authority: CN
Inventors: 章辉; 李晟; 陈耀; 郭洋; 朱理; 赵云鹏
Original assignee: Nisin Shanghai Intelligent Technology Co ltd
Current assignee: Nisin Shanghai Intelligent Technology Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-02-23

Abstract

The invention discloses a duplex cavity cabinet section bar with multiple mounting surfaces, which comprises a first cavity structure and a second cavity structure, wherein the first cavity structure is connected with the second cavity structure; the first cavity structure comprises a first mounting surface, a second mounting surface, a third mounting surface, a first outer mounting side surface, a first outer inclined supporting surface and a first inner inclined supporting surface; the second cavity structure comprises a fourth mounting surface, a fifth mounting surface, a sixth mounting surface, a second outer mounting side surface, a second outer inclined supporting surface and a second inner inclined supporting surface, and the fourth mounting surface is connected with the fifth mounting surface through a third right-angle edge. By adopting the technical scheme, the switch cabinet control cabinet frame profile can be compatible with the existing switch cabinet control cabinet frame profile, and more mounting surfaces are provided, so that the switch cabinet control cabinet frame profile is convenient to use flexibly; in a limited space, the net installation space is increased; the multi-bending enhances the cold hardening, and improves the strength of the section; the double-cavity butt joint design improves the anti-distortion strength of the section and reduces the production cost.

Description

Duplex cavity cabinet profile with multiple mounting surfaces and corresponding rack thereof

Technical Field

The invention relates to the technical field of cabinet section bars, in particular to a duplex cavity cabinet section bar with multiple mounting surfaces and a corresponding rack thereof.

Background

With the advancement of industrial automation and smart manufacturing, some foreign major companies have proposed the concept of a frame cabinet in order to accommodate new products and production models. One of them is the Lital Shuanghe Germany. The earlier product used a nine-fold profile, followed by a sixteen-fold profile. Meanwhile, in this stage, it is widely believed in the industry that the steel material can be strongly plastically deformed and cold-hardened by increasing the number of bending times, so that the strength of the steel material can be improved.

In order to highlight its ease of use, patent application No. 201680065240.7 discloses a new technique for a frame profile for a switchgear cabinet rack and a corresponding rack, which discloses a frame profile such that it maintains a greater functionality while maintaining a simple basic structure with as few bends as possible. The hollow profile is provided with a hollow cavity supporting four containing surfaces, two connecting sheets are connected with two right-angle undercuts, and the side surfaces of the profile are connected through sealing edges, wherein one side of each sealing edge is required to be a right angle, and the side surface of the profile is an oblique angle installing surface. The new frame section has less folding number, reduces the cold hardening effect, but reduces the strength of the section to some extent; the single cavity occupies a large space, so that the net installation space of the frame is reduced; the four mounting and accommodating surfaces share one internal space, so that the flexibility is limited, and the wide application is not facilitated; in addition, the connecting side surface can not be provided with holes for installation, so that additional nuts need to be riveted, and the free end of a single cavity is of a butt joint structure, so that the process difficulty and the cost are increased.

Disclosure of Invention

In order to solve the problems, the invention provides a cabinet profile with a duplex cavity and multiple mounting surfaces, which is compatible with the existing switch cabinet control cabinet frame profile, provides more mounting surfaces and is convenient to use flexibly; in a limited space, the net installation space is increased; the multi-bending enhances the cold hardening, and improves the strength of the section; the double-cavity butt joint design improves the anti-distortion strength of the section and reduces the production cost.

The duplex cavity cabinet section bar with the multiple mounting surfaces comprises a first cavity structure and a second cavity structure, wherein the first cavity structure is connected with the second cavity structure; the first cavity structure comprises a first mounting surface, a second mounting surface, a third mounting surface, a first external mounting side surface, a first external inclined supporting surface and a first internal inclined supporting surface, wherein the first mounting surface is connected with the second mounting surface through a first right-angle edge, the included angle between the first mounting surface and the second mounting surface is 90 degrees, the third mounting surface is connected with the first mounting surface through a second right-angle edge, the included angle between the third mounting surface and the first mounting surface is 90 degrees, the first internal inclined supporting surface is connected with the third mounting surface through a first obtuse-angle edge, the first external inclined supporting surface is connected with the first internal inclined supporting surface through a first obtuse-angle arc, and the first external mounting side surface is connected with the first external inclined supporting surface through a second obtuse-angle edge;

the second cavity structure comprises a fourth mounting surface, a fifth mounting surface, a sixth mounting surface, a second outer mounting side surface, a second outer inclined supporting surface and a second inner inclined supporting surface, the fourth mounting surface is connected with the fifth mounting surface through a third right-angle edge, the included angle between the fourth mounting surface and the fifth mounting surface is 90 degrees, the sixth mounting surface is connected with the fourth mounting surface through a fourth right-angle edge, the included angle between the sixth mounting surface and the fourth mounting surface is 90 degrees, the fifth mounting surface is connected with the second inner inclined supporting surface through a third obtuse-angle edge, the second outer inclined supporting surface is connected with the second inner inclined supporting surface through a second obtuse-angle arc, and the second outer mounting side surface is connected with the second outer inclined supporting surface through a fourth obtuse-angle edge; the second mounting surface is connected with the sixth mounting surface.

In the above scheme, first cavity structure passes through the connection piece with the second cavity structure and is connected, the connection piece passes through the sixth obtuse angle edge with first outside installation side and is connected, the connection piece passes through the fifth obtuse angle edge with second outside installation side and is connected.

In the above scheme, the angles of the fifth obtuse-angle edge and the sixth obtuse-angle edge are both 135 °.

In the above scheme, the inner side of the second mounting surface extends towards the connecting sheet to form a seventh obtuse-angle edge, and the inner side of the sixth mounting surface extends towards the connecting sheet to form an eighth obtuse-angle edge.

In the above scheme, the seventh obtuse edge extends towards the connecting piece and is connected with the connecting piece to form a first installation inclined plane, and the eighth obtuse edge extends towards the connecting piece and is connected with the connecting piece to form a second installation inclined plane.

In the above scheme, the angle of the seventh obtuse edge is 135 °, and the angle of the eighth obtuse edge is 135 °.

In the scheme, the angle ranges of the fourth obtuse-angle edge and the second obtuse-angle edge are 135-160 degrees.

In the scheme, the angles of the third obtuse-angle edge and the first obtuse-angle edge are both 95-110 degrees.

The utility model provides a rack, includes four vertical section bars and eight horizontal section bars, is the right angle orientation with three pair cavity rack section bars through the angle connecting piece each other respectively in eight angles of rack and connects, and the first right angle edge of all pair cavity rack section bars is inboard to the rack, and the opening between first obtuse angle circular arc, the second obtuse angle circular arc is towards the rack outside.

In the scheme, the outer sides of the first obtuse angle circular arc and the second obtuse angle circular arc of the duplex cavity cabinet profile are provided with two sealing edges, the two sealing edges are mutually and closely adjacent in a right angle and are closed in a surrounding mode, and the closed positions of the two sealing edges form the outer right-angle edge of the rack.

Compared with the prior art, the invention has the beneficial effects that:

1, the section has a unique double-cavity structure, so that more mounting surfaces are formed, and the section is convenient and flexible to mount;

2, the double-cavity structure of the section has more cold bending forming, better cold hardening effect and high section strength;

3, the sealing edge supported by the double inclined planes has a more reasonable sealing structure, and the inner inclined planes prevent accidental fluid accumulation;

4, the main mounting surface of the section bar can be fixed by bolts, so that the section bar is more convenient and reliable;

5, the installation surface on the outer side of the sectional material is placed in a 90-degree right angle, so that a larger installation space is provided, and the sectional material is convenient to connect and fix;

6, the section adopts a completely symmetrical structure, so that the processing and the installation are convenient;

and 7, the free end of the section bar is placed in the cavity, so that the free end of the section bar can be protected, and the service life of the rack is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a frame profile provided in accordance with one embodiment;

FIG. 2 is a schematic cross-sectional view of a frame profile provided in the second embodiment;

FIG. 3 is a schematic cross-sectional view of a rack profile provided in the third embodiment;

FIG. 4 is a first application example one according to FIG. 3;

FIG. 5 is a second embodiment of the first application according to FIG. 3;

FIG. 6 is a first example of the second application according to FIG. 3;

FIG. 7 is a second example of an application according to FIG. 3;

FIG. 8 is a first example of the third application according to FIG. 3;

FIG. 9 is a third example of an application according to FIG. 3;

FIG. 10 is a perspective view of the frame;

FIG. 11 is a side view of FIG. 10;

FIG. 12 is an upper detailed view of the internal view housing of FIG. 10;

FIG. 13 is an upper corner detail view of the external view housing of FIG. 10;

FIG. 14 is a schematic view of a corner splice of a rack;

fig. 15 is a perspective view of a profile in a rack.

In the figure: 1. first cavity structure 2, second cavity structure 3, connecting sheet 4 and section bar

5. First mounting surface 6, second mounting surface 7, and third mounting surface

8. A first outer mounting side 9, a first outer diagonal support surface 10, a first inner diagonal support surface

11. A first right-angle edge 12, a second right-angle edge 13, and a first obtuse-angle edge

14. A first obtuse arc 15, a second obtuse edge 16 and a fourth mounting surface

17. Fifth mounting surface 18, sixth mounting surface 19, second external mounting side surface

20. A second outer inclined supporting surface 21, a second inner inclined supporting surface 22 and a third right-angle edge

24. A fourth right-angled edge 25, a third obtuse-angled edge 26, and a second obtuse-angled arc

27. A fourth obtuse edge 28, a first fixed receiving portion 29 and a second fixed receiving portion

30. A fifth obtuse edge 31, a sixth obtuse edge 32 and a third fixing and accommodating part

33. A fourth fixed housing part 34, a fifth fixed housing part 35, and a sixth fixed housing part

36. Seventh fixed receiving portion 37, eighth fixed receiving portion 38, seventh obtuse edge

39. Eighth obtuse edge 40, first mounting inclined surface 41 and second mounting inclined surface

42. Inner side mounting surface 43, outer side mounting surface 44, first support slope

45. Second support inclined surface 46, third support inclined surface 47, fourth support inclined surface

48. Frame 49, vertical section bar 50, horizontal section bar 51 and angle connecting piece

52. First, second, and third inner mounting surfaces 53, 54, and

55. a fourth inner mounting surface 56, a first outer mounting surface 57, and a second outer mounting surface

58. Hanging member 59, identification feature

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

The first embodiment is as follows:

as shown in fig. 1, the invention is a double-body cabinet section bar with multiple mounting surfaces, which comprises a first cavity structure 1 and a second cavity structure 2, wherein the first cavity structure 1 and the second cavity structure 2 are connected through a connecting sheet 3, the connecting sheet 3 is positioned outside the section bar 4, bears the minimum gap of the free end of the section bar 4 and provides overload torque support, the connecting sheet 3 provides a possibility for dividing the section bar 4, and the first cavity structure 1 and the second cavity structure 2 can be independently used; the connecting piece 3 extends according to an angle of 135 degrees through a fifth obtuse edge 30 and a sixth obtuse edge 31, a second external mounting side surface 19 and a first external mounting side surface 8 which are equidistant are formed along the directions of the fifth obtuse edge 30 and the sixth obtuse edge 31, the first external mounting side surface 8 and the second external mounting side surface 19 are distributed on two sides of the connecting piece 3 in a right angle mode, the first external mounting side surface 8 is provided with a first fixing accommodating part 28, and the second external mounting side surface 19 is provided with a second fixing accommodating part 29;

the first cavity structure 1 comprises a first mounting surface 5, a second mounting surface 6, a third mounting surface 7, a first external mounting side surface 8, a first external inclined support surface 9 and a first internal inclined support surface 10, wherein the first mounting surface 5 is connected with the second mounting surface 6 through a first right-angle edge 11, the included angle between the first mounting surface 5 and the second mounting surface 6 is 90 degrees, the third mounting surface 7 is connected with the first mounting surface 5 through a second right-angle edge 12, the included angle between the third mounting surface 7 and the first mounting surface 5 is 90 degrees, the first internal inclined support surface 10 is connected with the third mounting surface 7 through a first obtuse-angle edge 13, the first external inclined support surface 9 is connected with the first internal inclined support surface 10 through a first obtuse-angle arc 14, and the first external mounting side surface 8 is connected with the first external inclined support surface 9 through a second obtuse angle edge 15; the first mounting surface 5 is provided with a fifth fixing and accommodating part 34, the second mounting surface 6 is provided with a seventh fixing and accommodating part 36, and the third mounting surface 7 is provided with a third fixing and accommodating part 32;

the second cavity structure comprises a fourth mounting surface 16, a fifth mounting surface 17, a sixth mounting surface 18, a second outer mounting side surface 19, a second outer inclined support surface 20 and a second inner inclined support surface 21, the fourth mounting surface 16 is connected with the fifth mounting surface 17 through a third right-angle edge 22, the included angle between the fourth mounting surface 16 and the fifth mounting surface 17 is 90 degrees, the sixth mounting surface 18 is connected with the fourth mounting surface 16 through a fourth right-angle edge 24, the included angle between the sixth mounting surface 18 and the fourth mounting surface 16 is 90 degrees, the fifth mounting surface 17 is connected with the second inner inclined support surface 21 through a third obtuse-angle edge 25, the second outer inclined support surface 20 is connected with the second inner inclined support surface 21 through a second obtuse-angle arc 26, and the second outer mounting side surface 19 is connected with the second outer inclined support surface 20 through a fourth obtuse-angle edge 27; the fourth mounting surface 16 has a sixth fixing and accommodating portion 35, the fifth mounting surface 17 has a fourth fixing and accommodating portion 33, and the sixth mounting surface 18 has an eighth fixing and accommodating portion 37;

the second mounting surface 6 is connected with the sixth mounting surface 18, the first outer inclined supporting surface 9 is equidistant to the second outer inclined supporting surface 20, the first inner inclined supporting surface 10 is equidistant to the second inner inclined supporting surface 21, and the first obtuse-angle arc 14 and the second obtuse-angle arc 26 have outer tangent points of shapes and form a sealing edge together with the corresponding supporting inclined surfaces.

Further, the angle of the fourth obtuse edge 27 and the angle of the second obtuse edge 15 are both 135-160 degrees, preferably about 155 degrees.

The first inner inclined supporting surface 10 and the first obtuse-angle arc 14 are distributed in an obtuse angle mode, the second inner inclined supporting surface 21 and the second obtuse-angle arc 26 are distributed in an obtuse angle mode to form an inner flow guide surface, liquid is prevented from gathering, and the obtuse angle range is 95-110 degrees, and about 100 degrees is preferred.

Example two:

as shown in fig. 2, the present embodiment differs from the first embodiment in that the second mounting surface 6 extends inward toward the web 3 to form a seventh obtuse edge 38, and the sixth mounting surface 18 extends inward toward the web 3 to form an eighth obtuse edge 39.

Preferably, the angle of seventh obtuse edge 38 is 135 ° and the angle of eighth obtuse edge 39 is 135 °.

Example three:

as shown in fig. 3, the present embodiment differs from the first embodiment in that the second mounting surface 6 extends inward toward the web 3 to form a seventh obtuse edge 38, and the sixth mounting surface 18 extends inward toward the web 3 to form an eighth obtuse edge 39; the seventh obtuse edge 38 extends towards the web 3 and connects with the web 3 to form a first mounting bevel 40, and the eighth obtuse edge 39 extends towards the web 3 and connects with the web 3 to form a second mounting bevel 41.

As shown in fig. 4, for the mounting of the outer mounting surface of the profile 4, a screw can be mounted to the outer mounting space of the profile 4 through the fifth fixing receiver 34 on the first mounting surface 5.

As shown in fig. 5, in another mode of mounting the outer mounting surface of the profile 4, screws can be mounted inward through the outer mounting space of the profile 4.

As shown in fig. 6, a shielding and sealing method of the profile is generally divided into two mounting surfaces, an inner mounting surface 42 and an outer mounting surface 43, for additional components. The outermost points of the second obtuse arc 26 of the profile 4 correspond to seals or shields on the inner mounting surface 42, which are shown as semi-circular but not limited to semi-circular shapes. The geometric center of the seal or shield is generally aligned with the outermost point of the second obtuse arc 26, and the intersection of the extended line of the outer mounting surface 43 and the second obtuse arc 26 is the outermost point of the second obtuse arc 26, at which the compression of the seal or shield is the greatest. The extending line of the outer mounting surface 43 is the outermost point of the second obtuse arc 26 at the intersection point of the second obtuse arc 26, so that the mounting function design of the outer mounting surface is conveniently expanded, and the production inspection of the section 4 is facilitated. Due to the symmetry of the profile 4, the first obtuse-angle arc 14 also has this function.

As shown in fig. 7, in another sealing and shielding manner of the profile 4, the second obtuse-angle arc 26 of the profile 4 forms an embedded wrapping surface with the first supporting inclined surface 44 and the second supporting inclined surface 45, and the sealing strip or the shielding strip can be nested in a sleeving manner. For outer member mounting, the first outer mounting side 8 and the second outer mounting side 19 on the profile 4 may provide an outer member supporting and positioning function through the additional hanging member 58, and at this time, the outer member inner mounting surface is more closely combined with the second obtuse-angle circular arc 26 due to the gravity of the outer member, so as to provide more uniform gravity distribution for the outer member.

As shown in fig. 8, in the sealing and shielding manner of the lower portion of the profile 4, the first obtuse-angle arc 14 formed by the third mounting surface 7 of the profile 4 and the third supporting inclined surface 46 does not collect the residual fluid due to gravity, as in the sealing and shielding manner of fig. 6.

As shown in fig. 9, in the sealing and shielding manner of the lower portion of the profile 4, the first obtuse-angle arc 14 formed by the third mounting surface 7 and the fourth supporting inclined surface 47 of the profile 4 is the same as the sealing and shielding manner of fig. 7, and the residual fluid is not collected on the first obtuse-angle arc due to gravity. This facilitates, for example, the drainage of condensate in the control cabinet of the switchgear, and is more advantageous for the cleaning of foreign bodies.

Example four:

as shown in fig. 10, a rack 48 provided for this embodiment includes four vertical profiles 49 and eight horizontal profiles 50, three profiles are connected to each other at right angles by corner connectors 51 in eight corners of the rack 48, and the first right-angle edges 11 of all the profiles face the inside of the rack 48, and the openings between the first obtuse-angle arcs 14 and the second obtuse-angle arcs 26 face the outside of the rack 48.

The outer sides of the first obtuse-angle circular arcs 14 and the second obtuse-angle circular arcs 26 of all the profiles are provided with two sealing edges which are mutually adjacent at a right angle and are closed in a surrounding manner, and the closed parts of the two sealing edges form outer right-angle edges of the rack 48.

As shown in fig. 11, which is a side view of the frame 48, the frame 48 is laterally formed by two vertical profiles 49, two horizontal profiles 51, and four corner connectors 51, and it can be seen that the second obtuse-angle arc 26 forms a circumferential sealing edge.

As shown in fig. 12, which is a rear corner inside perspective view of the frame 48, a vertical profile 49 and two horizontal profiles 50 intersect each other at right angles and are connected by corner connectors 51. The angle connecting piece 51 penetrates through the horizontal section bar 50 to form an upper end face and a lower end face, the upper end face is connected with the first obtuse arc 14 to form a surrounding sealing edge, and meanwhile, a mounting hole is reserved in the upper end face to facilitate top fixing; the lower end face exceeds the section bar, a mounting hole is reserved, and the upper hole and the lower hole can not be concentric, so that different installation and use are facilitated. For example, the upper end face of the corner connector can be used for fixing a hanging ring and the like, and the lower end face of the corner connector can be used for internally fixing internal parts. Obviously, the symmetrical profile interior mounting surfaces form two levels of mounting surfaces and are aligned with each other, for example the first 52 and second 53 interior mounting surfaces of the vertical profile 49 are aligned with the third 54 and fourth 55 interior mounting surfaces of the horizontal profile 50 to form an integral mounting surface of the rack 48.

As shown in fig. 13, which is a perspective view of the front corner of the frame 48, a vertical section 49 and two horizontal sections 50 intersect each other at right angles and are connected by corner connectors 51.

As shown in fig. 14, which is a front corner external perspective view of the machine frame 48, the splicing process of the vertical profiles 49 in the machine frame 48 is shown, while the corner connectors 51 are shown connecting the horizontal profiles 50. The first outer side mounting surface 56 and the second outer side mounting surface 57 of the profile 4 are arranged on the outer side, and the first outer side mounting surface 56 and the second outer side mounting surface 57 are provided with holes for connecting other parts or expanding the functions.

As shown in fig. 15, which is a perspective view of the profile 4, there are identification features 59 on both mounting faces of the profile 4, which have a guiding effect on the mounting inside the housing 48. At the same time, for horizontal profiles, its identification feature 59 can be used as a level indication function, for example, by means of an extended level.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A double-cavity cabinet profile with multiple mounting surfaces is characterized by comprising a first cavity structure and a second cavity structure, wherein the first cavity structure is connected with the second cavity structure; the first cavity structure comprises a first mounting surface, a second mounting surface, a third mounting surface, a first external mounting side surface, a first external inclined supporting surface and a first internal inclined supporting surface, wherein the first mounting surface is connected with the second mounting surface through a first right-angle edge, the included angle between the first mounting surface and the second mounting surface is 90 degrees, the third mounting surface is connected with the first mounting surface through a second right-angle edge, the included angle between the third mounting surface and the first mounting surface is 90 degrees, the first internal inclined supporting surface is connected with the third mounting surface through a first obtuse-angle edge, the first external inclined supporting surface is connected with the first internal inclined supporting surface through a first obtuse-angle arc, and the first external mounting side surface is connected with the first external inclined supporting surface through a second obtuse-angle edge;

2. A dual-cavity cabinet profile with multiple mounting surfaces as claimed in claim 1, wherein the first cavity structure is connected to the second cavity structure by a connecting piece, the connecting piece is connected to the first external mounting side surface by a sixth obtuse edge, and the connecting piece is connected to the second external mounting side surface by a fifth obtuse edge.

3. The dual-chamber cabinet profile with multiple mounting surfaces as claimed in claim 2, wherein the angles of the fifth obtuse edge and the sixth obtuse edge are both 135 °.

4. A two-section cavity cabinet profile with multiple mounting surfaces as claimed in claim 2, wherein the second mounting surface extends inwardly towards the connecting piece to form a seventh obtuse edge, and the sixth mounting surface extends inwardly towards the connecting piece to form an eighth obtuse edge.

5. A twin cavity cabinet profile with multiple mounting surfaces as claimed in claim 4 wherein the seventh obtuse edge extends towards and connects with the connecting tab to form a first mounting ramp and the eighth obtuse edge extends towards and connects with the connecting tab to form a second mounting ramp.

6. The double-cavity cabinet profile with multiple mounting surfaces as claimed in claim 5, wherein the angle of the seventh obtuse edge is 135 degrees, and the angle of the eighth obtuse edge is 135 degrees.

7. A two-dimensional cavity cabinet profile with multiple mounting surfaces as claimed in claim 1, wherein the fourth obtuse edge and the second obtuse edge are both at an angle ranging from 135 ° to 160 °.

8. The double-cavity cabinet profile with multiple mounting surfaces as claimed in claim 1, wherein the third obtuse-angle edge and the first obtuse-angle edge are both at an angle of 95-110 °.

9. A rack comprising four vertical profiles and eight horizontal profiles, wherein the vertical profiles and the horizontal profiles are the duplex cavity cabinet profiles with multiple mounting surfaces as claimed in any one of claims 1 to 8, three duplex cavity cabinet profiles are connected in the eight corners of the rack through corner connectors in a mutually right-angle orientation, the first right-angle edges of all the duplex cavity cabinet profiles face the inside of the rack, and the openings between the first obtuse-angle arcs and the second obtuse-angle arcs face the outside of the rack.

10. The rack according to claim 9, wherein the outer sides of the first obtuse arc and the second obtuse arc of all the double-cavity cabinet profiles are provided with two sealing edges, the two sealing edges are closely adjacent to each other at a right angle and are circumferentially closed, and the closed part of the two sealing edges forms an outer right-angle edge of the rack.