Prefabricated light steel structure fence and construction method

Abstract

The present invention discloses an assembled light steel structure fence; it includes a first column, a tail column, an array of middle columns, and a fence unit. The first column and the tail column are each provided with two first fence positioning grooves of the same structure on the side of the adjacent fence unit; a through second fence positioning groove is provided on a group of side surfaces corresponding to the middle column; a chain kit is inserted into the first fence positioning groove and the second fence positioning groove, and the cross-sectional shape of the chain kit is the same as the shape of the first fence positioning groove and the second fence positioning groove; the fence unit includes an upper crossbeam and a lower crossbeam, and a railing is provided at equal intervals between the upper crossbeam and the lower crossbeam; the upper crossbeam and the lower crossbeam are correspondingly inserted into the chain kit of the first column, the tail column, and the middle column. The present invention also discloses a construction method for the above-mentioned fence, which is fast to construct, reduces costs, and is easy to maintain; each fence component is independent, and if one component is damaged, it can be replaced separately, saving costs and resources.

Description

Technical Field

[0001] The present invention belongs to the technical field of enclosure wall construction, and in particular relates to an assembled light steel structure enclosure wall and a construction method. Background Art

[0002] Fences, as an important method of spatial separation, play a vital role in real life. Most fences are constructed with concrete or brick-concrete columns, with steel structures in the middle of the columns. Vertical fences are welded between upper and lower beams. The beams and columns are connected by welding or pre-buried pipe fittings. Construction requires either on-site welding or factory prefabrication. Regardless of the method, the process is time-consuming and labor-intensive. Fences constructed with welded steel pipes are particularly popular. Existing fences often use square steel pipe welding. The specific technique involves first welding a slightly thicker steel pipe into a rectangular shape, then welding thinner square or round steel pipes at regular intervals in between. Multiple rectangular fences are then spliced together to form a temporary fence. This integrated welded unit can compromise the overall aesthetics of the structure if any one component is damaged during use. If a vertical fence is damaged or falls off due to poor welding, the integrity of the fence is compromised, significantly reducing its effectiveness and compromising the overall unit's usability. Repairing each individual fence individually is costly. In actual use, as the degree of damage increases, they are often abandoned, wasting resources. This is especially true for very old fences, which are used frequently and often have only partially damaged parts that are discarded and remade. Sometimes, construction units use them in one place and then discard them as disposable consumables, only to purchase new ones for another project.

[0003] There is a kind of fence on the market that uses cast iron technology, angle steel is used as the crossbeam, and the cast fence is fixed to the angle steel with bolts. This technology is more troublesome to assemble. The cast iron fence needs to be fixed with bolts one by one, and its toughness is poor. It often breaks during use, so a certain amount of fence needs to be reserved in advance for replacement.

[0004] In summary, the problems existing in the prior art are:

[0005] (1) The walls are welded together as a whole, which makes transportation, installation and storage inconvenient.

[0006] (2) Vertical fences are cast and have poor versatility.

[0007] (3) The integrated installation requires a large number of people and lifting equipment when necessary, which is inconvenient to install.

[0008] (4) Partial damage affects the overall effect and is difficult to repair.

[0009] (5) The cost of cast iron process is relatively high and needs to be customized. A certain amount of fences need to be reserved as backup in the later stage.

[0010] There are certain difficulties in how to relatively maximize resource utilization efficiency, reduce construction costs, speed up construction speed, and increase product versatility and ease of use. Usually, it is difficult to take all of these into account during construction. Therefore, the applicant has designed and developed an assembled light steel structure fence and construction method to solve the above problems. Summary of the Invention

[0011] In response to the problems existing in the prior art, the present invention provides an assembled light steel structure fence and a construction method that are quick to construct, reduce costs, are easy to maintain, and improve resource utilization efficiency.

[0012] The present invention is achieved in this way: an assembled light steel structure fence; including a first column, a tail column, an array of intermediate columns, and fence units connecting adjacent intermediate columns, characterized in that: the first column and the tail column are each provided with two first fence positioning grooves of the same structure on the side surfaces of adjacent fence units; a through second fence positioning groove is provided on a group of side surfaces corresponding to the intermediate columns; a chain kit is inserted into the above-mentioned first fence positioning groove and the second fence positioning groove, and the cross-sectional shape of the chain kit is the same as the shape of the above-mentioned first fence positioning groove and the second fence positioning groove ; The linkage kit is matched with the above-mentioned first fence positioning groove and second fence positioning groove in a clearance fit; the fence unit includes an upper crossbeam and a lower crossbeam, and railings are provided at equal intervals between the upper crossbeam and the lower crossbeam; the railings on both sides are at an equal distance from the two end faces of the upper crossbeam and the lower crossbeam, and are equal to the length of the linkage kit extending out, the first column, the tail column, and the middle column; the cross-sectional shape of the upper crossbeam and the lower crossbeam is the same as the cross-sectional shape of the linkage kit, and the upper crossbeam and the lower crossbeam are correspondingly inserted into the linkage kit of the first column, the tail column and the middle column, and are clearance fit with the linkage kit.

[0013] In the above technical solution, preferably, railing insertion grooves are provided on the opposite sides between the upper crossbeam and the lower crossbeam, and the railings are inserted into the corresponding railing insertion grooves.

[0014] The above technical solution preferably further includes a corner column, and a third fence positioning groove is provided on a group of adjacent side surfaces at the upper end and the lower end of the corner column, and a chain kit is installed in the third fence positioning groove.

[0015] In the above technical solution, preferably, the maximum fitting clearance between the chain kit and the first fence positioning grooves of the first and tail columns, the second fence positioning grooves of the middle columns, and the third fence positioning grooves of the corner columns is 1 mm; the maximum fitting clearance between the upper and lower beams and the chain kit is 1 mm.

[0016] In the above technical solution, preferably, limit blocks are symmetrically provided in the interlocking kit.

[0017] In the above technical solution, preferably, the lower ends of the first column, the tail column, the middle column and the corner column are all connected to concrete column foundations.

[0018] In the above technical solution, preferably, the upper end surfaces of the first column, the middle column, the tail column and the corner column are provided with protective cover plates.

[0019] In the above technical solution, preferably, the first column, the tail column or the middle column is a metal pipe component or a concrete component.

[0020] The present invention also relates to a construction method based on the above-mentioned assembled light steel structure fence, which is characterized by comprising the following steps:

[0021] S1. Measure and calculate the number and length of fence units and intermediate posts based on the actual length of the pre-built fence; and select the prefabricated first posts, tail posts, intermediate posts, fence units, corner posts, and interlocking kits;

[0022] S2. Mark the positions of the first column, the last column, the middle column, and the corner columns on the ground according to the measurement and calculation results in step 1;

[0023] S3. Dig a foundation pit according to the marked location, then place a rectangular parallelepiped with the same cross-sectional shape as the first column, the last column, and the middle column in the center of the foundation pit; then pour concrete around the rectangular parallelepiped. After the concrete solidifies, pull out the rectangular parallelepiped to form a hollow concrete column foundation;

[0024] S4. During installation, the first column is installed based on one end near the fence as the starting point. When installing the first column, the first column is inserted into the concrete column foundation located at the starting point of the end of the fence; the first set of chain kits is inserted into the first fence positioning groove of the first column; then a group of fence units prepared in step 1 is selected as the first fence unit, and the upper beam and lower beam of the first fence unit are correspondingly inserted into the above-mentioned first set of chain kits; then the first intermediate column is inserted into the second concrete column foundation, and after the first intermediate column is installed, the second chain kits are respectively inserted into the second fence positioning groove of the first intermediate column, and are inserted into the upper beam and lower beam of the first group of fence units through the intermediate column; assemble in sequence; when a corner is required, a corner column is selected, and the chain kit is inserted into the third fence positioning groove of the corner column, and then spliced in sequence according to the same method until the tail column is installed.

[0025] The advantages and technical effects of the present invention are as follows: The present invention relates to a fully assembled fence. Except for the foundation, each fence component is independent. If one of the components is damaged, it can be replaced individually without affecting the overall appearance and use effect, saving construction costs and resources. The present invention draws inspiration from the ancient mortise and tenon structure. During the construction process, the fence can be assembled without any tools, achieving rapid construction, reducing costs, facilitating maintenance, and improving resource utilization efficiency. When necessary, local materials can even be used to replace the fence with other materials, which can be used more easily than simply processing waste wood and profiles, greatly improving resource utilization efficiency. The use of an assembled structure allows for rapid construction. Under certain conditions, two people can construct the structure. After the foundation is completed, no tools are required during the subsequent construction process. The construction is simple and fast, with low investment costs and convenient later maintenance, which improves resource utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of Example 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the first column installation structure in Example 1;

[0028] Figure 3 This is a schematic diagram of the installation structure of the middle column in Example 1;

[0029] Figure 4 This is a schematic diagram of the tail column installation structure in Example 1;

[0030] Figure 5 It is a schematic diagram of the interlocking kit structure;

[0031] Figure 6 It is a schematic diagram of the interlocking kit structure with a limit block;

[0032] Figure 7 This is a schematic diagram of the gasket and interlocking kit installation structure;

[0033] Figure 8 This is a structural diagram of embodiment 2 of the present invention;

[0034] Figure 9 This is a schematic diagram of the corner column installation structure in Example 2;

[0035] Figure 10 This is a schematic diagram of the connection structure of the chain kit in Example 2.

[0036] In the figure, 10, first column; 101, first fence positioning groove; 20, middle column; 201, second fence positioning groove; 30, tail column; 40, fence unit; 401, upper beam; 402, lower beam; 403, railing; 50, interlocking kit; 501, limit block; 502, gasket; 60, corner column; 601, third fence positioning groove; 70, column base; 80, protective cover. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] There are certain difficulties in how to relatively maximize resource utilization efficiency, reduce construction costs, speed up construction speed, and increase product versatility and ease of use. Usually, it is difficult to take all of these into account during construction. Therefore, the applicant has designed and developed an assembled light steel structure fence and construction method to solve the above problems.

[0039] Example 1, please refer to Figures 1 to 5 , an assembled light steel structure fence; comprising a first column 10, a tail column 30, an array of middle columns 20, and a fence unit 40 connecting adjacent middle columns, the first column and the tail column are provided with two first fence positioning grooves 101 of the same structure on the side surfaces of the adjacent fence units. In the actual production process, one end of the first fence positioning groove is open and the other end is a blind end, and a through structure can also be adopted as the middle column; a through second fence positioning groove 201 is provided on a group of side surfaces corresponding to the middle column; a chain kit 50 is inserted in the above-mentioned first fence positioning groove and the second fence positioning groove, and the cross-sectional shape of the chain kit is the same as that of the above-mentioned first fence positioning groove and the second fence positioning groove; the chain kit is connected to the above-mentioned first fence positioning groove and the second fence positioning groove. The fit between the first fence positioning groove and the second fence positioning groove is a clearance fit, which is convenient for plug-in installation; the fence unit 40 includes an upper crossbeam 401 and a lower crossbeam 402, and a railing 43 is provided between the upper crossbeam and the lower crossbeam at equal intervals; the railings on both sides are equidistant from the end faces of the upper crossbeam and the lower crossbeam, and are equal to the length of the extension of the chain kit, the first column, the tail column, and the middle column; the cross-sectional shape of the upper crossbeam and the lower crossbeam is the same as the cross-sectional shape of the chain kit, and the upper crossbeam and the lower crossbeam are correspondingly inserted into the chain kit of the first column, the tail column and the middle column, and are clearance fit with the chain kit, which is convenient for plug-in installation. If the gap of the above-mentioned chain kit is too large during assembly, a gasket 502 can be added on its side to ensure the stability of the installation of the chain kit. Please refer to Figure 7 .

[0040] In the above technical solution, preferably, railing insertion slots are provided on opposite sides between the upper and lower crossbeams, and the railings are inserted into the corresponding railing insertion slots. The above structure is used for on-site installation. The railings can also be pre-assembled in the factory to improve construction efficiency.

[0041] In the above technical solution, preferably, the maximum fitting clearance between the chain kit and the first fence positioning grooves of the first and tail columns, the second fence positioning grooves of the middle columns, and the third fence positioning grooves of the corner columns is 1 mm; the maximum fitting clearance between the upper and lower beams and the chain kit is 1 mm.

[0042] In the above technical solution, preferably, the interlocking kit is symmetrically provided with limit blocks 501, see Figure 6 , which plays the role of insertion and positioning. During actual production, three grooves are cut at the position where the limit block is set, and then the closed side is bent inward to form the limit block. For example, the distance between the middle columns is 3020mm, the length of the beam is 3020mm, and the length of the chain kit is 480mm. 140mm of space is reserved at both ends of the chain kit. The position 140mm away from both ends is used as a dividing groove on the chain kit. The dividing groove is a rectangle of 30*20mm, of which one side at the 140mm position is fixed. Cut along the other three sides, and bend the limit block along the edge at 140mm toward the inside of the sleeve. After the cutting is completed, a built-in limit block 501 is formed. The distance between the middle columns is 3020mm, and the length of the fence assembly is 3020mm. It can be installed directly without passing through the middle column hole. The fence assembly is fixed by the chain kit. The outermost side of the fence at both ends of the fence assembly is 140mm away from both ends of the beam, and the part of the chain kit protruding from the middle column is also 140mm. Install an intermediate post in sequence, install a chain kit in sequence, install a fence component in sequence, install the intermediate post in sequence, install the chain kit in sequence, install the intermediate post in sequence, and install in sequence until the next node.

[0043] In the above technical solution, preferably, the lower ends of the first column, the tail column, the middle column and the corner column are all connected to a concrete column foundation 70, which improves the stability of the wall. The concrete column foundation is cast on site to ensure the firm connection with the foundation.

[0044] In the above technical solution, preferably, the upper end surfaces of the first column, the middle column, the tail column, and the corner column are provided with protective cover plates 80. The above structure prevents the upper end surfaces from being damaged due to transportation and collision, and also plays a certain protective role, preventing rain erosion and shortening the service life.

[0045] In the above technical solution, preferably, the first column, the tail column, or the middle column is a metal pipe component or a concrete component. In this embodiment, galvanized metal pipes are preferred. When using concrete components, light steel keels or steel bars are prefabricated therein to enhance the overall strength of the structure.

[0046] Example 2, please refer to Figures 8 to 10 Based on Example 1, this embodiment further includes a corner post 60. A set of adjacent side surfaces at the upper and lower ends of the corner post are provided with third fence positioning slots 601. These third fence positioning slots accommodate interlocking kits, making them suitable for construction of corner walls. In this embodiment, the interlocking kits employ a plug-in structure, meaning one end of one interlocking kit is inserted into the other, creating an interlocking connection and enhancing the security of the connection.

[0047] The present invention also relates to a construction method based on the above-mentioned assembled light steel structure fence, which is characterized by comprising the following steps:

[0048] S1. Measure and calculate the number and length of fence units and intermediate posts based on the actual length of the pre-built fence; and select the prefabricated first post, tail post, intermediate post, fence unit, corner post, and interlocking kit. Specific application examples: 1) For the first and tail posts, intermediate posts, and corner posts, use 20*20*200cm square steel. Machine the first, second, and third fence positioning grooves on the upper part with the center point at 20.3cm from the top. The specifications are (6.4*6.4cm). Machine the first, second, and third fence positioning grooves on the lower part with the center point at 56cm from the bottom.

[0049] 2) Upper and lower crossbeams: Use 6*6*326cm, and make a railing slot (2.1*2.1cm) at the center point 26cm away from the end. Arrange several railing slots at intervals of 16cm towards the other end.

[0050] 3) Vertical railing: 2*2*128cm square steel;

[0051] 4) Interlocking kit: 6.2*6.2*36cm square steel;

[0052] S2. Mark the positions of the first column, the last column, the middle column, and the corner columns on the ground according to the measurement and calculation results in step 1;

[0053] S3. Dig a foundation pit according to the marked position, and then place a rectangular parallelepiped with the same cross-sectional shape as the first column, the last column, and the middle column in the center of the foundation pit; then pour concrete around the rectangular parallelepiped, and after the concrete solidifies, pull out the rectangular parallelepiped to form a hollow concrete column foundation; in order to improve the reusability, the concrete foundation and the first, last, middle, and corner columns can be installed separately. After determining the positions of the first, last, middle, and corner columns, dig a 50cm square foundation pit, and place a 20.1*20.1*40cm rectangular parallelepiped (the material can be wood, iron, or foam) in the center to create a certain space for the insertion of the middle column, and then pour concrete to form a hollow concrete foundation;

[0054] S4. During installation, the first column is installed based on one end near the fence as the starting point. When installing the first column, the first column is inserted into the concrete column foundation located at the starting point of the end of the fence, and the insertion depth is about 40 cm; the first group of chain kits is inserted into the first fence positioning groove of the first column; then a group of fence units prepared in step 1 is selected as the first fence unit, and the upper beam and lower beam of the first fence unit are correspondingly inserted into the above-mentioned first group of chain kits; then the first intermediate column is inserted into the second concrete column foundation, and after installing the first intermediate column, the second chain kits are respectively inserted into the second fence positioning groove of the first intermediate column, and are inserted into the upper beam and lower beam of the first group of fence units through the intermediate column; assemble in sequence; when a corner is required, a corner column is selected, and the chain kit is inserted into the third fence positioning groove of the corner column, and then spliced in sequence according to the same method until the tail column is installed.

[0055] In order to achieve the purpose of the present invention, the present invention may also adopt the following alternative methods. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0056] 1. According to the actual situation, the first and last columns, middle columns and corner columns can be made of a variety of materials. If it is a fence that is used for a long time, the first and last columns, middle columns and corner columns can also be made of light steel structure or reinforced concrete structure. The size can be increased accordingly, and the sizes of other components can be adjusted accordingly.

[0057] 2. The foundation can be prefabricated to facilitate construction, reduce concrete curing steps, and speed up construction progress. If the fence will not be used for a long time, a simple foundation construction method can be used. Specifically, prefabricate a 50*50*20cm square reinforced concrete component, and reserve a 20.1*20.1*40cm rectangular installation hole in the center. When installing, first place the prefabricated component in the predetermined position, determine the position of the center hole, and then dig holes in the ground (for the first and last columns, middle columns, and corner column sockets). Then, place the first and last columns, middle columns, corner columns, interlocking kits, fence components, etc. in sequence. There are many ways to dig holes for the middle columns. To speed up construction progress, you can make a digging tool similar to the Luoyang shovel. Take a 30cm square steel with the same specifications as the middle column, use the center line of one side and the top surface as the cutting plane, cut the square steel, and install the handle to form a shovel-shaped tool.

[0058] 3. You can also use a rotary drilling machine to dig holes with a diameter of 200mm. When using this digging method, the lower end of the middle column cannot be closed when installing the first, tail and middle columns, so that the first, tail and middle columns can be smoothly inserted into the predetermined position. When installing the first, tail and middle columns, you must pay attention to the fact that if the geology is relatively hard, you need to use a hammering tool. Before hammering, you must try hammering to determine the appropriate machine and the appropriate hammering force to prevent excessive hammering from causing deformation of the first, tail and middle columns.

[0059] 4. When fast construction is required, the first and last columns, middle columns and corner columns can also be directly inserted into the predetermined positions using a pile driver without setting up a foundation. However, before construction, it is necessary to check whether the buried depth of the first and last columns, middle columns and corner columns is sufficient to ensure the firmness, safety and reliability of the wall based on the on-site conditions.

[0060] 5. According to the actual situation of the construction unit, the wall material can be selected in various forms. Some construction sites have a lot of scrap steel, wood, scrap steel bars, etc. The present invention can use a variety of materials according to the actual situation, and can choose a variety of combinations to maximize the full utilization of resources, reduce unnecessary investment as much as possible, and reduce carbon emissions.

[0061] The present invention relates to a fully assembled fence. Except for the foundation, each fence component is independent. If one of the components is damaged, it can be replaced separately without affecting the overall appearance and use effect, saving construction costs and resources. The present invention draws inspiration from the ancient mortise and tenon structure. During the construction process, the fence can be assembled without any tools, achieving rapid construction, reducing costs, facilitating maintenance, and improving resource utilization efficiency. When necessary, local materials can even be used to replace the fence with other materials, which can be used more easily than simply processing waste wood and profiles, greatly improving resource utilization efficiency. The use of an assembled structure allows for rapid construction. Under certain conditions, two people can construct the structure. After the foundation is completed, no tools are required during the subsequent construction process. The construction is simple and fast, the investment cost is low, and the subsequent maintenance is convenient, thereby improving resource utilization efficiency.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An assembled light steel structure fence, comprising a first column, a tail column, a plurality of intermediate columns, and fence units connecting adjacent intermediate columns, characterized in that: The first column and the tail column are each provided with two first fence positioning grooves of the same structure on the side surface adjacent to the fence unit; A through second fence positioning groove is provided on a group of side surfaces corresponding to the middle column; A locking kit is inserted into the first fence positioning groove and the second fence positioning groove, and the cross-sectional shape of the locking kit is the same as that of the first fence positioning groove and the second fence positioning groove; the locking kit is fitted with the first fence positioning groove and the second fence positioning groove in a clearance fit; The fence unit includes an upper crossbeam and a lower crossbeam, and railings are arranged at equal intervals between the upper crossbeam and the lower crossbeam; the railings on both sides are equidistant from the end faces of the upper crossbeam and the lower crossbeam, and are equal to the length of the chain kit extending outward, the first column, the tail column, and the middle column; the cross-sectional shape of the upper crossbeam and the lower crossbeam is the same as the cross-sectional shape of the chain kit, and the upper crossbeam and the lower crossbeam are correspondingly inserted into the chain kit of the first column, the tail column, and the middle column, and are clearance-fitted with the chain kit; The opposite sides between the upper crossbeam and the lower crossbeam are provided with railing insertion slots, and the railings are inserted into the corresponding railing insertion slots; It also includes a corner column, and a group of adjacent side surfaces at the upper end and the lower end of the corner column are provided with a third fence positioning groove, and a chain kit is installed in the third fence positioning groove.

2. The assembled light steel structure fence according to claim 1 is characterized in that: The maximum fitting clearance between the chain kit and the first fence positioning grooves of the first and tail columns, the second fence positioning grooves of the middle columns, and the third fence positioning grooves of the corner columns is 1mm; the maximum fitting clearance between the upper and lower beams and the chain kit is 1mm.

3. The assembled light steel structure fence according to claim 1 is characterized in that: Limit blocks are symmetrically arranged in the interlocking kit.

4. The assembled light steel structure enclosure according to claim 1 is characterized in that: The lower ends of the first column, the tail column, the middle column and the corner column are all connected to the concrete column foundation.

5. The assembled light steel structure fence according to claim 1 is characterized in that: The upper end surfaces of the first column, the middle column, the tail column and the corner column are provided with protective cover plates.

6. The assembled light steel structure fence according to any one of claims 1 to 5, characterized in that: The first column, the tail column or the middle column is a metal pipe component or a concrete component.

7. The construction method of the assembled light steel structure enclosure according to claim 6, characterized in that: The steps include: S1. Measure and calculate the number and length of fence units and intermediate posts based on the actual length of the pre-built fence; and select the prefabricated first posts, tail posts, intermediate posts, fence units, corner posts, and interlocking kits; S2. Mark the positions of the first column, the last column, the middle column, and the corner columns on the ground according to the measurement and calculation results in step 1; S3. Dig a foundation pit according to the marked location, then place a rectangular parallelepiped with the same cross-sectional shape as the first column, the last column, and the middle column in the center of the foundation pit; then pour concrete around the rectangular parallelepiped. After the concrete solidifies, pull out the rectangular parallelepiped to form a hollow concrete column foundation; S4. During installation, the first column is installed based on one end near the fence as the starting point. When installing the first column, the first column is inserted into the concrete column foundation located at the starting point of the end of the fence; the first set of chain kits is inserted into the first fence positioning groove of the first column; then a group of fence units prepared in step 1 is selected as the first fence unit, and the upper beam and lower beam of the first fence unit are correspondingly inserted into the above-mentioned first set of chain kits; then the first intermediate column is inserted into the second concrete column foundation, and after the first intermediate column is installed, the second chain kits are respectively inserted into the second fence positioning groove of the first intermediate column, and are inserted into the upper beam and lower beam of the first group of fence units through the intermediate column; assemble in sequence; when a corner is required, a corner column is selected, and the chain kit is inserted into the third fence positioning groove of the corner column, and then spliced in sequence according to the same method until the tail column is installed.

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