Large-span super-high space steel structure building metal net suspended ceiling and use method thereof

Abstract

The present application relates to the field of metal ceiling, in particular to a kind of large-span superhigh space steel structure building metal net ceiling and its using method.The present application provides a kind of large-span superhigh space steel structure building metal net ceiling, comprising: ceiling frame, ceiling frame has several installation slots, installation slot is suitable for installing metal net component, and metal net component includes several split metal net units.Installation slot two inner side walls are respectively provided with positioning mechanism, and the inside of ceiling frame also has several adjusting mechanisms.The diameter of the metal wire on each metal net unit is increased by splitting the conventional metal net into multiple metal net units to form a metal net component, which improves the overall stiffness of the metal net component, and the metal wire on each metal net unit is supported by the respective shaped outer frame, avoiding the burden on the shaped outer frame caused by arranging multiple metal wires in one shaped outer frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal ceiling, in particular to a large-span super-high space steel structure building metal net ceiling and a using method thereof. BACKGROUND

[0002] With the progress of society, metal net ceiling is applied more and more widely, especially in large-area, large-span public buildings, the decorative effect of indoor steel structure metal net ceiling is more in line with modern mass aesthetics compared with traditional gypsum board ceiling.

[0003] However, considering that large-span super-high space steel structure buildings are usually composed of net racks, suspension cables, shells and trusses, the structure is complex and the space is narrow, the possibility of conflict between the traditional ceiling steel frame conversion layer and the steel structure is great. At the same time, the overall stiffness of the metal net plate is poor, and it is easy to deform without ribbed plate, and adding reinforcing bars affects the overall appearance. Therefore, it is necessary to design a large-span super-high space steel structure building metal net ceiling and a using method thereof. SUMMARY

[0004] The purpose of the present application is to provide a large-span super-high space steel structure building metal net ceiling and a using method thereof to solve the above problems.

[0005] In order to achieve the above purpose, the present application provides a large-span super-high space steel structure building metal net ceiling, comprising: a ceiling frame, the ceiling frame has a plurality of installation slots on it, the installation slots are suitable for installing metal net assemblies, the metal net assemblies comprise a plurality of metal net units arranged separately; and

[0006] The two inner walls of the installation slot are respectively provided with a positioning mechanism, and the inside of the ceiling frame also has a plurality of adjusting mechanisms, the positioning mechanism is movably arranged, and is linked with the adjusting mechanism;

[0007] The adjusting mechanism is rotatably connected with the ceiling frame, and the adjusting mechanism has an opening position and a closing position; wherein

[0008] During installation, each metal net unit is inserted into the corresponding installation slot in sequence, the adjusting mechanism is rotated to the closing position, the adjusting mechanism drives the positioning mechanism to close, so that the positioning mechanism gathers and clamps and positions each metal net unit;

[0009] During disassembly, the adjusting mechanism is rotated to the opening position, the adjusting mechanism drives the positioning mechanism to open, so that the positioning mechanism separates each metal net unit, so that each metal net unit can be taken out of the installation slot independently.

[0010] Further, the metal net assembly comprises at least two metal net units, each of which has a plurality of metal wires.

[0011] The metal wires on the two adjacent metal net units are staggered.

[0012] Further, the metal net unit comprises a shaped outer frame, which is rectangular, hollow inside, and has a plurality of connecting holes on the inner side.

[0013] The two ends of the metal wire are connected to two corresponding connecting holes on the shaped outer frame.

[0014] The metal wires are arranged obliquely, and the oblique directions of the metal wires are the same.

[0015] The metal wires are arranged at equal intervals.

[0016] During installation, each shaped frame is inserted into the corresponding installation slot, so that the shaped frame is inserted into the positioning mechanism, and the adjusting mechanism drives the positioning mechanism to close, so that the positioning mechanism gathers the shaped frames, and the metal wires on the two adjacent shaped frames are combined to form a metal net.

[0017] Further, the ceiling frame comprises a frame body and a split plate arranged separately, one side of the frame body is open, and the installation slot is arranged on the frame body and communicates with the opening of the frame body.

[0018] The installation slots are arranged at equal intervals along the length direction of the ceiling frame, and the two adjacent installation slots are separated by a partition plate.

[0019] Further, the limiting grooves are arranged on both sides of the partition plate and the inner side wall of the ceiling frame.

[0020] Further, two through grooves are arranged in the partition plate, the through grooves communicate with the limiting grooves, and the positioning mechanism comprises a sliding block.

[0021] The side of the sliding block facing the installation slot is provided with two support rods, and the support rods are hinged to the sliding block.

[0022] The end of the support rod is provided with a plug-in slot, the opening end of the plug-in slot faces the installation slot, and the plug-in slot corresponds to the shaped outer frame.

[0023] The side of the plug-in slot away from the installation slot is hinged to the support rod.

[0024] Further, the partition plate is internally provided with an adjusting groove, which is arranged between the two through grooves and communicates with the two through grooves.

[0025] Further, the adjusting mechanism is arranged in the adjusting groove, and the adjusting mechanism comprises an adjusting shaft and adjusting blocks arranged on both sides of the adjusting shaft, and the two adjusting blocks are mirror arranged on both sides of the adjusting shaft.

[0026] The adjusting shaft is in abutment with the sliding block.

[0027] Further, the frame body top is provided with a plurality of hangers arranged in the circumferential direction.

[0028] In addition, the application also provides a using method, which comprises the large-span super-high space steel structure building metal net suspended ceiling as shown above, when installing, the metal net units are sequentially inserted into the corresponding plug-in grooves, the adjusting shaft is rotated to make the adjusting blocks disengage from the sliding blocks, the sliding blocks are slid along the through grooves to the adjusting shaft direction, so that the two supporting rods are rotated to each other to fold, so as to drive the two metal net units to fold.

[0029] When disassembling, the adjusting shaft is rotated to make the end of the adjusting block abut against the sliding block, so that the sliding block is slid along the through groove to the direction away from the adjusting groove, so that the two supporting rods are rotated away from each other to drive the two metal net units to separate.

[0030] Compared with the prior art, the application has the following beneficial effects: by dividing the conventional metal net into a plurality of metal net units to form a metal net assembly, the diameter of the metal wire on each metal net unit is increased to improve the overall rigidity of the metal net assembly, and the metal wire on each metal net unit is supported by the respective shaped outer frame, avoiding the burden on the shaped outer frame caused by arranging a plurality of metal wires on one shaped outer frame. BRIEF DESCRIPTION OF DRAWINGS

[0031] The application will be further described below in combination with the drawings and examples.

[0032] Fig. 1 A perspective view of the large-span super-high space steel structure building metal net suspended ceiling of the application is shown;

[0033] Fig. 2 A top view of the large-span super-high space steel structure building metal net suspended ceiling of the application is shown;

[0034] Fig. 3 A perspective view of the metal net unit of the application is shown;

[0035] Fig. 4A perspective view of the positioning mechanism of the present invention is shown;

[0036] Fig. 5 A perspective view of the adjustment mechanism of the present invention is shown;

[0037] Fig. 6 A first state diagram of the positioning mechanism of the present invention is shown;

[0038] Fig. 7 A second state diagram of the positioning mechanism of the present invention is shown.

[0039] In the picture:

[0040] 1. Ceiling frame; 11. Mounting groove; 12. Frame body; 13. Split panel; 14. Divider panel; 141. Limiting groove; 142. Through groove; 143. Adjusting groove; 15. Hanging rod;

[0041] 2. Metal mesh unit; 21. Metal wire; 22. Molded outer frame;

[0042] 3. Positioning mechanism; 31. Sliding block; 32. Support rod; 33. Insertion slot;

[0043] 4. Adjustment mechanism; 41. Adjustment shaft; 42. Adjustment protrusion. Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0045] Example 1, as Figs. 1 to 7 As shown, this embodiment provides a metal mesh ceiling for a large-span, ultra-high spatial steel structure building, including: a ceiling frame 1, metal mesh components, a positioning mechanism 3, and an adjustment mechanism 4. The ceiling frame 1 is suitable for installing the metal mesh components, the positioning mechanism 3, and the adjustment mechanism 4. The metal mesh components are suitable for forming a sufficiently rigid metal mesh to create the ceiling. The positioning mechanism 3 is suitable for positioning the metal mesh components and, during installation or disassembly, can separate or merge the metal mesh components to form a metal mesh. The adjustment mechanism is linked to the positioning mechanism 3 and can drive the positioning mechanism 3 to separate or close the metal mesh components. The above components are described in detail below.

[0046] The ceiling frame 1 is a rectangular frame structure, and the metal net assembly, the positioning mechanism 3 and the adjusting mechanism 4 can be installed on the ceiling frame 1 to realize the overall structure of the large-span super-high space steel structure building metal net ceiling. The ceiling frame 1 has a plurality of installation slots 11, and the installation slots 11 are suitable for installing the metal net assembly. In the embodiment, the number of installation slots 11 on the ceiling frame 1 is five, that is, the number of metal net assemblies is also five. Five metal net assemblies fill the installation slots 11 respectively. It should be noted that the existing large-span super-high space steel structure building is usually composed of net racks, suspension cables, shells and trusses, and the structure is complex and the space is narrow. The possibility of conflict between the traditional ceiling steel frame transfer layer and the steel structure is great. That is, the metal net structure in the prior art is difficult to replace in the case of multiple layers, and the metal net plate has poor overall rigidity. The method commonly used to increase the rigidity is to increase the thickness of the metal net. After increasing the metal net, the weight of the metal net increases, which will cause pressure on the supporting mechanism of the metal net. Therefore, additional reinforcing ribs need to be installed. After a series of adjustments described above, the structure on the metal net ceiling becomes more and more complex, but it affects the overall appearance. Therefore, in the embodiment, the metal net assembly is divided into several metal net units 2, and the metal net units 2 are connected to form the overall metal net assembly. In this way, the thickness of each metal net unit 2 can be increased. After the plurality of metal net units 2 are connected to form the metal net assembly, each metal net unit 2 can support itself, thereby improving the overall support stability. At the same time, the plurality of metal net units 2 can be separated, so that any metal net unit 2 can be taken out and placed separately without disassembling the whole, thereby improving the assembly convenience.

[0047] The structure of the suspended ceiling frame 1 is described below. The suspended ceiling frame 1 comprises a frame body 12 and a split plate 13. The frame body 12 is the main part of the suspended ceiling frame 1. The frame body 12 is open on one side and is provided with a plurality of partition plates 14. The distance between each partition plate 14 is equal. The adjacent two partition plates 14 and the outermost two partition plates 14 and the inner wall of the frame body 12 form a plurality of slots, i.e. installation slots 11. The installation slots 11 are provided on the frame body 12. The frame body 12 is C-shaped, i.e. open on one side. The installation slots 11 are in communication with the opening of the frame body 12. Through the above arrangement, each metal mesh unit 2 can be inserted into the corresponding installation slot 11 from the open side of the frame body 12 to form a uniform and beautiful metal mesh suspended ceiling. The split plate 13 is detachably installed on the open side of the frame body 12. After the metal mesh unit 2 is installed in the frame body 12, the operator can install the split plate 13 on both ends of the open side of the frame body 12 and connect it with the frame body 12 through corresponding fasteners such as bolts to achieve the effect of sealing the metal mesh unit 2 inside the frame body 12 to prevent the metal mesh unit 2 from being detached from the frame body 12.

[0048] The metal mesh assembly comprises at least two metal mesh units 2. Each metal mesh unit 2 comprises a plurality of metal wires 21. Each metal mesh unit 2 comprises a shaped outer frame 22. The shaped outer frame 22 is rectangular and hollow inside. The inner side of the shaped outer frame 22 is provided with a plurality of connecting holes. The two ends of each metal wire 21 are connected to the corresponding connecting holes on the shaped outer frame 22. Each metal wire 21 is inclined and the inclination direction of each metal wire 21 is the same. Each metal wire 21 is arranged at equal intervals. Through the above arrangement, the shaped outer frame 22 has a plurality of inclined and continuous metal wires 21. The two ends of each metal wire 21 are connected to the connecting holes on the shaped outer frame 22 to enable the metal wire 21 to be reliably connected and supported by the shaped outer frame 22. In this way, when designing each metal mesh unit 2, the rigidity of the metal wire 21 in the metal mesh unit 2 can be improved by increasing the diameter of the metal wire 21. At the same time, after the diameter of the metal wire 21 is increased, the thickness of the shaped outer frame 22 is also increased to ensure that the metal wire 21 can be reliably supported. The front and back surfaces of the two metal mesh units 2 are attached to the shell so that the metal wires 21 on the adjacent two metal mesh units 2 have opposite inclination directions and are interlaced with each other, i.e. forming a metal mesh. Based on the above features, the number of metal mesh units 2 inside the metal mesh assembly should be an even number so that the adjacent two metal mesh units 2 can be paired. At the same time, each two metal mesh units 2 form a layer of metal mesh, thereby forming a number of layers equal to half the number of metal mesh units 2. In this embodiment, the number of metal mesh units 2 is two.

[0049] In order to facilitate the hoisting of the frame body 12 to the roof, the top of the frame body 12 is provided with a plurality of hoisting rods 15 arranged circumferentially. The bottom end of the hoisting rod 15 is connected with the top end of the frame body 12, and the other end of the hoisting rod 15 extends upward. Optionally, the top end of the hoisting rod 15 can be provided with a flat plate, and mounting holes are formed in the flat plate. Then, appropriate fasteners such as screws are selected to pass through the mounting holes and install the flat plate to the roof, so as to achieve the effect of hoisting the frame body 12.

[0050] The positioning mechanism 3 is installed on both sides of the installation slot 11. The positioning mechanism 3 is movably arranged and can move close to or away from the installation slot 11 in the horizontal direction. When the positioning mechanism 3 moves close to each other, the metal mesh units 2 can be folded and fixed. When the positioning mechanism 3 moves away from each other, the metal mesh units 2 can be separated.

[0051] In order to realize the effect of installing the positioning mechanism 3, the two sides of the partition plate 14 and the inner side wall of the ceiling frame 1 are provided with limiting grooves 141, and the positioning mechanism 3 is arranged in the limiting grooves 141. Meanwhile, two through grooves 142 are also mirror-imaged arranged in the partition plate 14, and the through grooves 142 are communicated with the limiting grooves 141. The positioning mechanism 3 comprises sliding blocks 31, which are slidingly arranged in the through grooves 142, and the width of the through grooves 142 is smaller than the width of the limiting grooves 141. The sliding blocks 31 are provided with two support rods 32 on one side of the installation slot 11, the support rods 32 are hinged with the sliding blocks 31, and torsion springs are arranged at the hinged positions of the support rods 32 and the sliding blocks 31, so that the two support rods 32 are driven to open towards the two sides of the sliding block 31. Through the above arrangement, when the sliding block 31 slides to the inner side of the through groove 142, the side wall of the through groove 142 extrudes the support rod 32, so that the two support rods 32 are inwards retracted. Conversely, when the sliding block 31 slides to the outer side of the through groove 142, the support rod 32 gradually extends out of the through groove 142, so that the support rod 32 is opened outwards under the action of the torsion spring. The end of the support rod 32 is provided with an insertion groove 33, the opening end of the insertion groove 33 is arranged towards the installation slot 11, and the insertion groove 33 corresponds to the shaped outer frame 22. During installation, each sliding block 31 slides outwards to the maximum stroke position, the shaped outer frame 22 is inserted into the insertion groove 33 along one side, and at this time, the two support rods 32 connected to one sliding block 31 are separated, that is, the two shaped outer frames 22 are also in a separated state. The side of the insertion groove 33 away from the installation slot 11 is hinged with the support rod 32, and a torsion spring is also arranged at the hinged position of the insertion groove 33 and the support rod 32, so that the insertion groove 33 always remains horizontal under the driving of the torsion spring. Specifically, the insertion groove 33 remains horizontal under the driving of the torsion spring in the initial state, and when the metal mesh unit 2 is inserted into the insertion groove 33 and the sliding block 31 is inwards retracted, the non-vertical direction forces applied by the two support rods 32 on the insertion groove 33 on both sides of the metal mesh unit 2 will offset each other, so that the insertion groove 33 still remains horizontal. In order to further ensure the reliable realization of the above state, in the embodiment, the width of the metal mesh unit 2 is greater than the distance between the two insertion grooves 33, the length between the bottoms of the two insertion grooves 33 is greater than the width of the metal mesh unit 2, and the distance between the bottom of one insertion groove 33 and the bottom of the other insertion groove 33 is less than the width of the metal mesh unit 2.

[0052] The adjusting mechanism 4 is arranged inside the partition plate 14, the sliding block 31 is connected with the adjusting mechanism 4, the adjusting mechanism 4 is rotationally connected with the partition plate 14, and the adjusting mechanism 4 can drive the corresponding sliding block 31 to slide when the adjusting mechanism 4 rotates. Specifically, the adjusting mechanism 4 has an opening position and a closing position, when installed, the adjusting mechanism 4 is rotated to the closing position, the adjusting mechanism 4 drives the sliding block 31 to slide outward, so that the support rods 32 are folded, and the support rods 32 gather and clamp the metal mesh units 2;

[0053] When disassembled, the adjusting mechanism 4 is rotated to the opening position, the adjusting mechanism 4 drives the support rods 32 to open, so that the support rods 32 separate the metal mesh units 2, and the metal mesh units 2 can be independently taken out from the installation slot 11.

[0054] In order to achieve the above effect, in the embodiment, the adjusting groove 143 is further arranged inside the partition plate 14, the adjusting groove 143 is arranged between the two through grooves 142, and the adjusting groove 143 is in communication with the two through grooves 142. The adjusting mechanism 4 is arranged in the adjusting groove 143, the adjusting mechanism 4 includes an adjusting shaft 41 and adjusting protrusions 42 arranged on both sides of the adjusting shaft 41, and the two adjusting protrusions 42 are mirror images arranged on both sides of the adjusting shaft 41. The adjusting shaft 41 is in abutment with the sliding block 31. One side of the sliding block 31 is connected with a spring, and the spring drives the sliding block 31 to keep close to the adjusting shaft 41. Through the above arrangement, when the adjusting shaft 41 is rotated to the closing position, the adjusting protrusions 42 are respectively separated from the two sliding blocks 31, at this time, the adjusting shaft 41 is in abutment with the sliding block 31, each sliding block 31 is retracted into the through groove 142, and each metal mesh unit 2 is folded; when the adjusting shaft 41 is rotated to the opening position, the adjusting protrusions 42 are respectively separated from the two sliding blocks 31 to abutment, so that the adjusting protrusions 42 push the sliding blocks 31 to slide outward, so that the support rods 32 extend out of the through groove 142, and each metal mesh unit 2 is separated.

[0055] In the embodiment, a use method is provided, which comprises the large-span super-high space steel structure building metal mesh ceiling as shown in the embodiment one,

[0056] When installed, each metal mesh unit 2 is sequentially inserted into the corresponding plug-in groove 33, the adjusting shaft 41 is rotated to separate the adjusting protrusions 42 from the sliding blocks 31, the sliding blocks 31 slide along the through grooves 142 to the adjusting shaft 41, so that the two support rods 32 are rotated to the folding position, so as to drive the two metal mesh units 2 to fold;

[0057] When disassembling, the adjusting shaft 41 is rotated to the end of the adjusting block 42 abutting against the sliding block 31, so that the sliding block 31 slides along the through groove 142 to the direction away from the adjusting groove 143, so that the two supporting rods 32 rotate away from each other, so as to drive the two metal net units 2 to separate.

[0058] It is worth mentioning that other components and technical features of the large-span super-high space steel structure building metal net ceiling involved in the present application should be regarded as prior art, and the specific structure, working principle and possible control mode and spatial arrangement mode involved can be selected by using the conventional selection in the art, and should not be regarded as the invention point of the present application. The present application will not be further expanded and described in detail.

[0059] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A large-span super-high space steel structure building metal net suspended ceiling, characterized in that, The utility model relates to a kind of large-span superhigh space steel structure building metal net ceiling, including: Ceiling frame (1), several installation slots (11) are provided on the ceiling frame (1), the installation slots (11) are suitable for installing metal net assembly, the metal net assembly includes several split metal net units (2);And Two sides of the installation slot (11) are respectively provided with positioning mechanism (3), and the inside of the ceiling frame (1) further has several adjusting mechanisms (4), the positioning mechanism (3) is movably arranged, and is linked with the adjusting mechanism (4); The adjusting mechanism (4) is rotatably connected with the ceiling frame (1), and the adjusting mechanism (4) has opening position and closing position;Wherein When installing, each metal net unit (2) is inserted into corresponding installation slot (11) in sequence, the adjusting mechanism (4) is rotated to closing position, the adjusting mechanism (4) drives the positioning mechanism (3) to close, so that the positioning mechanism (3) gathers and clamps each metal net unit (2) and positions; When disassembling, the adjusting mechanism (4) is rotated to opening position, the adjusting mechanism (4) drives the positioning mechanism (3) to open, so that the positioning mechanism (3) separates each metal net unit (2), so that each metal net unit (2) can be independently removed from the installation slot (11); The metal net assembly includes at least two metal net units (2), and the metal net unit (2) has a plurality of metal wires (21);And Metal wires (21) on adjacent two metal net units (2) are staggered arrangement; The metal net unit (2) includes a shaped outer frame (22), the shaped outer frame (22) is rectangular, and the shaped outer frame (22) is hollow inside, and the inner side of the shaped outer frame (22) is provided with a plurality of connecting holes;Two ends of the metal wire (21) are connected with two corresponding connecting holes on the shaped outer frame (22) respectively; Wherein, when installing, each shaped outer frame (22) is inserted into corresponding installation slot (11), so that the shaped outer frame (22) is inserted with the positioning mechanism (3), the adjusting mechanism (4) drives the positioning mechanism (3) to close, so that the positioning mechanism (3) gathers each shaped outer frame (22), so that metal wires (21) on adjacent two shaped outer frames (22) are combined to form metal net.

2. The large-span superhigh space steel structure building metal net ceiling according to claim 1, wherein The ceiling frame (1) includes a split frame body (12) and a split plate (13), one side of the frame body (12) is provided with an opening, and the installation slot (11) is formed in the frame body (12), and each installation slot (11) is communicated with the opening of the frame body (12); The installation slots (11) are arranged equidistantly along the length direction of the ceiling frame (1), and there is a partition plate (14) between adjacent two installation slots (11).

3. The large-span superhigh space steel structure building metal net ceiling according to claim 2, wherein The limiting groove (141) is arranged on the both sides of the partition plate (14) and the inner side wall of the ceiling frame (1). 4.The metal net ceiling of large-span super-high space steel structure building of claim 3, characterized in that, The two through grooves (142) are symmetrically arranged in the partition plate (14), and the through grooves (142) are communicated with the limiting grooves (141). The sliding block (31) is arranged on the side of the mounting slot (11) and is hinged with the support rod (32). The end of the support rod (32) is provided with the insertion groove (33), and the opening end of the insertion groove (33) is arranged towards the mounting slot (11). The insertion groove (33) is hinged with the support rod (32) on the side away from the mounting slot (11). 5.The metal net ceiling of large-span super-high space steel structure building of claim 4, characterized in that, The adjusting groove (143) is arranged between the two through grooves (142) in the partition plate (14), and the adjusting groove (143) is communicated with the two through grooves (142). 6.The metal net ceiling of large-span super-high space steel structure building of claim 5, characterized in that, The adjusting mechanism (4) is arranged in the adjusting groove (143), and the adjusting mechanism (4) comprises the adjusting shaft (41) and the adjusting protrusions (42) arranged on the both sides of the adjusting shaft (41). The adjusting shaft (41) is abutted with the sliding block (31). 7.The metal net ceiling of large-span super-high space steel structure building of claim 6, characterized in that, The frame body (12) is provided with the plurality of suspension rods (15) arranged in the circumferential direction on the top. 8.A use method, comprising the metal net ceiling of large-span super-high space steel structure building of claim 7, characterized in that, During installation, the metal net units (2) are sequentially inserted into the corresponding insertion grooves (33), the adjusting shaft (41) is rotated to make the adjusting protrusions (42) disengage from the sliding block (31), the sliding block (31) is slid along the through grooves (142) towards the adjusting shaft (41) to make the two support rods (32) rotate towards each other to be folded to drive the two metal net units (2) to be folded; During disassembly, the adjusting shaft (41) is rotated to make the end of the adjusting protrusions (42) abut with the sliding block (31) to make the sliding block (31) slide along the through grooves (142) away from the adjusting groove (143) to make the two support rods (32) rotate away from each other to drive the two metal net units (2) to be separated.

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