Reinforcing single body for post-configured ring beam and assembly type reinforcing ring beam composed of reinforcing single body
By designing a reinforced unit for the ring beam after configuration, and combining the main body, connecting plates and anchor bars in an insertion manner, the problem of cumbersome ring beam reinforcement operations in old buildings is solved, achieving a simplified, stable and efficient seismic reinforcement effect. It adapts to different wall sizes and improves the overall stiffness and seismic resistance of the building.
Patent Information
- Application Number
- CN202520139424.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In existing technologies, the seismic reinforcement of ring beams in old buildings is cumbersome and difficult to standardize. In particular, when reinforcing the exterior facade of the wall, it can easily affect the flatness of the structure and may lead to exposed steel bars. Moreover, the existing reinforcement methods are difficult to adapt to the requirements of wall size.
The reinforcing unit for the post-configuration ring beam includes a main body, a first transverse connecting piece, a second transverse connecting piece, and multiple anchor bars. It forms an assembled reinforcing ring beam through plugging and anchoring, which simplifies the operation and adapts to the wall size. Multiple anchor bars are used to reinforce along the wall thickness and length, forming a thin-body reinforcing structure.
It simplifies seismic reinforcement operations, reduces operational difficulty, ensures structural stability and flatness, adapts to different wall sizes, improves seismic strength and stiffness, and reduces the risk of exposed steel bars.
Smart Images
Figure CN223739050U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a reinforcing monomer for rear-arranged ring beam and an assembled reinforcing ring beam composed of the same, and belongs to the technical field of building structures. BACKGROUND
[0002] Old building detection and identification is a comprehensive evaluation process aimed at ensuring the structural safety, normal use function, and compliance with current building safety standards of the building. Through identification, safety hazards in old buildings can be found and repaired in a timely manner to ensure the safety of the building during use. At the same time, the identification results provide a scientific basis for the repair, reinforcement, reconstruction, or demolition of the building. Old building identification is a complex and important process involving multiple aspects and factors. Through scientific and standardized identification processes and methods, safety hazards in old buildings can be found and repaired in a timely manner to ensure the safe use of the building.
[0003] In the specific detection and identification process of old buildings, the problems of building structures mainly focus on two points: one is insufficient structural bearing capacity, and the other is excessively low seismic structural grade. Among them, the difficulty of seismic reinforcement is relatively large, because the seismic reinforcement method needs to be implemented according to relevant specifications, and the current seismic reinforcement atlas and corresponding seismic reinforcement method of specifications have complex and complicated construction procedures. Due to the size matching relationship between the ring beam and the wall body having specification requirements, the difficulty of adding a ring beam for seismic reinforcement of the wall body in existing buildings is particularly large, and the reinforcement method is difficult to standardize and unify. The main problems are:
[0004] The reinforcement measures of the wall body outer facade are complex, mainly through the connection of the external ring beam and the steel cable outside the wall to form a reinforcement method, which is complicated to operate, affects the structure of the wall body outer facade and the original flatness, and also causes the exposure of steel bars on the indoor side, making it difficult to avoid the layout of exposed steel bars. CONTENT OF THE UTILITY MODEL
[0005] In order to overcome the defects of the prior art, the reinforcing monomer for rear-arranged ring beam and the assembled reinforcing ring beam composed of the same are provided to solve the above problems.
[0006] The reinforcing monomer for post-arrangement ring beam comprises a main plate body, a first transverse connecting sheet, two second transverse connecting sheets and a plurality of anchor bars, the main plate body is a long strip-shaped plate body, the first transverse connecting sheet is arranged at one end of the main plate body, one end of the first transverse connecting sheet is fixedly connected with the main plate body, the other end of the first transverse connecting sheet is a plug-in end, a first plug-in part is arranged on the first transverse connecting sheet, the first plug-in part is arranged close to the main plate body, the two second transverse connecting sheets are arranged at the other end of the main plate body in sequence from top to bottom, a plug-in gap is formed between the two second transverse connecting sheets, one end of each second transverse connecting sheet is fixedly connected with the main plate body, a second plug-in part is arranged at the other end of each second transverse connecting sheet, a plurality of anchor bars are arranged on the side of the main plate body facing the wall body, one end of each anchor bar is fixedly connected with the main plate body, and the other end of each anchor bar is a penetrating end matched with the wall body.
[0007] As a preferred scheme, the plurality of anchor bars are arranged in a matrix form on the side of the main plate body facing the wall body.
[0008] As a preferred scheme, the first plug-in part is a first plug-in hole, the second plug-in part is a second plug-in hole, and the shape of the first plug-in hole is the same as that of the second plug-in hole.
[0009] As a preferred scheme, the main plate body is a steel plate, and the first transverse connecting sheet and the second transverse connecting sheet are steel sheets.
[0010] As a preferred scheme, the side of the first transverse connecting sheet facing the wall body is arranged flush with the side of the main plate body facing the wall body, and the side of each second transverse connecting sheet facing the wall body is arranged flush with the side of the main plate body facing the wall body.
[0011] As a preferred scheme, the thickness of the first transverse connecting sheet is the same as that of the second transverse connecting sheet, and the thickness of the first transverse connecting sheet is smaller than that of the main plate body.
[0012] The assembled reinforcing ring beam is composed of the reinforcing monomer for post-arrangement ring beam, a plurality of reinforcing monomers for post-arrangement ring beam, a plurality of first plug-in rods and a plurality of second plug-in rods, the plurality of reinforcing monomers for post-arrangement ring beam are arranged at the top of the wall body along the length direction of the wall body.
[0013] Each rear configuration ring beam reinforcing monomer comprises a main plate body, a first transverse connecting sheet, two second transverse connecting sheets and a plurality of anchor bars, the main plate body is a long strip-shaped plate body, the first transverse connecting sheet is arranged at one end of the main plate body, one end of the first transverse connecting sheet is fixedly connected with the main plate body, the other end of the first transverse connecting sheet is a plug-in end, a first plug-in part is arranged on the first transverse connecting sheet, the first plug-in part is arranged close to the main plate body, the two second transverse connecting sheets are arranged horizontally at the other end of the main plate body in sequence from top to bottom, a plug-in gap is formed between the two second transverse connecting sheets, one end of each second transverse connecting sheet is fixedly connected with the main plate body, a second plug-in part is arranged at the other end of each second transverse connecting sheet, and the plurality of anchor bars are arranged on one side of the main plate body facing the wall body, one end of each anchor bar is fixedly connected with the main plate body, and the other end of each anchor bar is a penetrating end matched with the wall body;
[0014] When one end of one rear configuration ring beam reinforcing monomer is inserted into the plug-in gap between the two second transverse connecting sheets of one rear configuration ring beam reinforcing monomer adjacent to the one end through the first transverse connecting sheet, the first plug-in part on the first transverse connecting sheet is in communication with the two second plug-in parts above and below the first plug-in part to form a first plug-in channel, and a first plug rod is detachably connected in the first plug-in channel; when the other end of one rear configuration ring beam reinforcing monomer is connected with the first transverse connecting sheet of another rear configuration ring beam reinforcing monomer adjacent to the other end through the plug-in gap between the two second transverse connecting sheets, the two second plug-in parts on the two second transverse connecting sheets are arranged above and below the first plug-in part in the first transverse connecting sheet respectively, a second plug-in channel is formed in communication between the two second plug-in parts and the first plug-in part, and a second plug rod is detachably connected in the second plug-in channel.
[0015] The rear configuration ring beam reinforcing monomer has the advantages that:
[0016] 1、The rear configuration ring beam reinforcing monomer can form a ring beam structure suitable for an old wall body through cooperation between the main plate body, the first transverse connecting sheet, the two second transverse connecting sheets and the plurality of anchor bars, the rear configuration ring beam reinforcing monomer has a simple structure, the connecting position of the main plate body is formed in three directions through cooperation between the first transverse connecting sheet, the two second transverse connecting sheets and the plurality of anchor bars, the occupying space is only the space position of a wall body plaster layer, a thin reinforcing structure form is formed, the structure form is suitable for the old wall body itself, the formation difficulty of the rear ring beam is reduced and simplified, the overall rigidity of the rear ring beam is ensured, the rear ring beam is durable and resistant to use, the operation difficulty of the anti-seismic reinforcing ring beam is reduced, and the operation mode is standardized and unified.
[0017] 2. The assembly type reinforcing ring beam can select the number of reinforcing single bodies for the rear configuration ring beam according to the size specification of the wall body, and is connected stably and conveniently, occupies small space position and is easy to install, reduces the arrangement process of the outer facade of the wall body, is beneficial to reduce the operation difficulty of the rear anti-seismic reinforcing ring beam on the old wall body, is beneficial to standardize the unified operation mode, and is suitable for popularization and use. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a top view structural schematic view of the reinforcing single body for the rear configuration ring beam;
[0019] Figure 2 is a front view structural schematic view of the reinforcing single body for the rear configuration ring beam;
[0020] Figure 3 is a rear view structural schematic view of the reinforcing single body for the rear configuration ring beam;
[0021] Figure 4 is a front view structural schematic view of the reinforcing single body for the rear configuration ring beam;
[0022] Figure 5 is a top view structural schematic view of the reinforcing single body for the rear configuration ring beam;
[0023] Figure 6 is Figure 5 is an enlarged structural schematic view of position A in the middle;
[0024] Figure 7 is a front view structural schematic view of the assembly type reinforcing ring beam installed on the wall body.
[0025] In the figure: 1-main plate body; 2-first transverse connecting sheet; 3-second transverse connecting sheet; 4-anchor bar; 5-first plug-in part; 6-plug-in gap; 7-second plug-in part; 8-first plug-in rod; 9-second plug-in rod; 20-wall body. DETAILED DESCRIPTION
[0026] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application.
[0027] Specific embodiment one: combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 andFigure 7 The embodiment is described, and the embodiment includes a main plate body 1, a first transverse connecting piece 2, two second transverse connecting pieces 3, and a plurality of anchor bars 4. The main plate body 1 is an elongated plate body, and the specific configuration length of the main plate body 1 is determined according to reinforcement design requirements. The first transverse connecting piece 2 is arranged at one end of the main plate body 1, one end of the first transverse connecting piece 2 is fixedly connected with the main plate body 1, and the other end of the first transverse connecting piece 2 is a plug-in end. The first transverse connecting piece 2 is provided with a first plug-in part 5, and the first plug-in part 5 is arranged close to the main plate body 1. The two second transverse connecting pieces 3 are arranged in sequence from top to bottom at the other end of the main plate body 1, and a plug-in gap 6 is formed between the two second transverse connecting pieces 3. One end of each second transverse connecting piece 3 is fixedly connected with the main plate body 1, and the other end of each second transverse connecting piece 3 is provided with a second plug-in part 7. The plurality of anchor bars 4 are arranged on the side of the main plate body 1 facing the wall body 20. One end of each anchor bar 4 is fixedly connected with the main plate body 1, and the other end of each anchor bar 4 is a penetrating end matched with the wall body 20.
[0028] Further, the plurality of anchor bars 4 are inserted into the wall body 20 along the thickness direction of the wall body 20, and have a reinforcing effect along the thickness direction of the wall body 20. The structure of the anchor bar 4 is the same as that of the anchor bar in the prior art. The main plate body 1 is attached to the indoor side of the wall body 20, and has an effect of reinforcing the wall body 20 from the indoor side. The main plate body 1 is extended and reinforced at both ends through the cooperation of the first transverse connecting piece 2 and the two second transverse connecting pieces 3, and has a reinforcing effect along the length direction of the wall body 20. The cooperation between the main plate body 1, the first transverse connecting piece 2, the two second transverse connecting pieces 3, and the plurality of anchor bars 4 can reinforce the wall body 20 from the length and thickness directions of the wall body 20, thereby improving the overall seismic strength of the building.
[0029] Specific implementation method two: the embodiment is a further limitation of the specific implementation method one. The plurality of anchor bars 4 are arranged in a matrix form on the side of the main plate body 1 facing the wall body 20. The matrix arrangement of the plurality of anchor bars 4 is a dense multi-point reinforcement form. The outer diameter of one end of the anchor bar 4 is relatively large, and the outer diameter of the penetrating end of the anchor bar 4 is relatively small. The length of the anchor bar 4 is matched with the size of the wall thickness, and the length of the anchor bar 4 is at least 20 times the thickness of the main plate body 1, thereby forming a structure in which a thin plate is attached to the indoor side of the wall body 20 and the anchor bar 4 penetrates the wall body 20 to a certain depth, and a local ring beam reinforcement mode is formed.
[0030] The matrix arrangement of the plurality of anchor bars 4 can improve the uniformity of reinforcement along the thickness direction of the wall body 20. The arrangement density of the plurality of anchor bars 4 is determined according to specific reinforcement design requirements.
[0031] Specific implementation three: this implementation is further limited to specific implementation one or two, the first plug-in part 5 is a first plug-in hole, the second plug-in part 7 is a second plug-in hole, the shape of the first plug-in hole is the same as the shape of the second plug-in hole. Combined with Figure 2 And Figure 3 As shown in the figure, the first plug-in part 5 and the two second plug-in parts 7 are arranged on the reinforcing monomer for the rear configuration ring beam, realizing the connection mode of two ends and three positions, which is beneficial to the stability of the transverse and longitudinal multi-position staggered plug-in formed by connecting with other reinforcing monomers for the rear configuration ring beam.
[0032] Further, the first plug-in part 5 and the second plug-in part 7 have the same structure, the first plug-in part 5 can also be a slot body with a narrow outer and wide inner, a strip-shaped opening or other forms of connection, which can ensure stable and rapid connection with other reinforcing monomers for the rear configuration ring beam.
[0033] Specific implementation four: this implementation is further limited to specific implementation one, two or three, the main plate body 1 is a steel plate, the first transverse connecting piece 2 and the second transverse connecting piece 3 are steel sheets, which can be integrally made, the steel sheet has high durability and shear resistance, which improves the durability and firmness of the main structure of the reinforcing monomer for the rear configuration ring beam.
[0034] Specific implementation five: this implementation is further limited to specific implementation one, two, three or four, the side of the first transverse connecting piece 2 facing the wall body 20 is flush with the side of the main plate body 1 facing the wall body 20, and the side of each second transverse connecting piece 3 facing the wall body 20 is flush with the side of the main plate body 1 facing the wall body 20. By arranging in this way, the flatness of the side of the wall body 20 can be formed, and the thin structure can also be attached, which improves the uniformity and stability of the attachment with the wall body 20.
[0035] Specific implementation six: this implementation is further limited to specific implementation one, two, three, four or five, the thickness of the first transverse connecting piece 2 and the second transverse connecting piece 3 is the same, and the thickness of the first transverse connecting piece 2 is less than the thickness of the main plate body 1. By arranging in this way, the thickness of the structure of the utility model can be improved, which is beneficial to the small space occupation of the assembly and reinforcement, and can also provide a space position for the indoor and outdoor plaster layer.
[0036] Specific implementation seven: combined with Figures 1 to 7 This embodiment is described, the plurality of reinforcing monomers for the rear configuration ring beam, a plurality of first plug-in rods 8 and a plurality of second plug-in rods 9, the plurality of reinforcing monomers for the rear configuration ring beam are arranged on the top of the wall body 20 along the length direction of the wall body 20;
[0037] Each rear configuration circle beam reinforcing monomer includes a main plate body 1, a first transverse connecting sheet 2, two second transverse connecting sheets 3 and a plurality of anchor bars 4, the main plate body 1 is a long strip-shaped plate body, the first transverse connecting sheet 2 is arranged at one end of the main plate body 1, one end of the first transverse connecting sheet 2 is fixedly connected with the main plate body 1, the other end of the first transverse connecting sheet 2 is a plug-in end, a first plug-in part 5 is arranged on the first transverse connecting sheet 2, the first plug-in part 5 is arranged close to the main plate body 1, two second transverse connecting sheets 3 are arranged at the other end of the main plate body 1 from top to bottom in sequence, a plug-in gap 6 is formed between the two second transverse connecting sheets 3, one end of each second transverse connecting sheet 3 is fixedly connected with the main plate body 1, a second plug-in part 7 is arranged at the other end of each second transverse connecting sheet 3, a plurality of anchor bars 4 are arranged on one side of the main plate body 1 facing the wall body 20, one end of each anchor bar 4 is fixedly connected with the main plate body 1, the other end of each anchor bar 4 is a penetrating end matched with the wall body 20;
[0038] When one end of one rear configuration circle beam reinforcing monomer is inserted into the plug-in gap 6 between two second transverse connecting sheets 3 of one rear configuration circle beam reinforcing monomer adjacent thereto through the first transverse connecting sheet 2, the first plug-in part 5 on the first transverse connecting sheet 2 is in communication with two second plug-in parts 7 adjacent thereto above and below to form a first plug-in channel, and a first plug-in rod 8 is detachably connected in the first plug-in channel correspondingly;When the other end of one rear configuration circle beam reinforcing monomer is connected with the first transverse connecting sheet 2 of another rear configuration circle beam reinforcing monomer adjacent thereto through the plug-in gap 6 between two second transverse connecting sheets 3, two second plug-in parts 7 on two second transverse connecting sheets 3 are arranged above and below the first plug-in part 5 in the first transverse connecting sheet 2 respectively, and a second plug-in channel is formed in communication between two second plug-in parts 7 and the first plug-in part 5, and a second plug-in rod 9 is detachably connected in the second plug-in channel correspondingly.
[0039] Further, a plurality of rear configuration circle beam reinforcing monomers are installed together through a plurality of first plug-in rods 8 and a plurality of second plug-in rods 9, so that the overall rigidity of the wall body 20 can be enhanced when building a house, and the bending strength of the assembled reinforcing circle beam can be enhanced, and the reinforcing effect is improved.
[0040] The use process of the utility model:
[0041] After obtaining the size data of the length and thickness of the wall 20, the number of reinforcing units for post-arranged ring beams is determined according to the length of the wall 20, and the length of the anchor bars 4 in the reinforcing units for post-arranged ring beams is selected to match the thickness of the wall 20. Then, the reinforcing units for post-arranged ring beams are installed one by one. After scraping the plaster layer on the indoor side of the wall 20, the reinforcing units for post-arranged ring beams are buckled on the wall 20, ensuring that the anchor bars 4 penetrate into the wall 20, and realizing the preliminary positioning process of the reinforcing units for post-arranged ring beams. By analogy, the installation process of other reinforcing units for post-arranged ring beams is realized. One end of a reinforcing unit for post-arranged ring beams is inserted into the insertion gap 6 between two second transverse connecting pieces 3 of an adjacent reinforcing unit for post-arranged ring beams through the first transverse connecting piece 2. The first insertion part 5 on the first transverse connecting piece 2 is connected to the two second insertion parts 7 above and below it to form a first insertion channel. A first insertion rod 8 is inserted into the first insertion channel and welded to fix it in the first insertion channel. When the other end of the reinforcing unit for post-arranged ring beams is connected to the first transverse connecting piece 2 of another adjacent reinforcing unit for post-arranged ring beams through the insertion gap 6 between the two second transverse connecting pieces 3, the two second insertion parts 7 on the two second transverse connecting pieces 3 are arranged above and below the first insertion part 5 in the first transverse connecting piece 2, respectively. The two second insertion parts 7 are connected to the first insertion part 5 to form a second insertion channel. A second insertion rod 9 is inserted into the second insertion channel and welded to fix it in the second insertion channel. By analogy, the reinforcing process of the wall 20 by the multiple reinforcing units for post-arranged ring beams, the first insertion rods 8 and the second insertion rods 9 is completed.
Claims
1. A post-configuration reinforcement unit for a ring beam, characterized by: The reinforcing unit for circle beam comprises a main plate body (1), a first transverse connecting sheet (2), two second transverse connecting sheets (3) and a plurality of anchor bars (4), the main plate body (1) is a long strip plate body, the first transverse connecting sheet (2) is arranged at one end of the main plate body (1), one end of the first transverse connecting sheet (2) is fixedly connected with the main plate body (1), the other end of the first transverse connecting sheet (2) is a plug-in end, a first plug-in part (5) is arranged on the first transverse connecting sheet (2), the first plug-in part (5) is arranged close to the main plate body (1), two second transverse connecting sheets (3) are arranged at the other end of the main plate body (1) in sequence from top to bottom, a plug-in gap (6) is formed between the two second transverse connecting sheets (3), one end of each second transverse connecting sheet (3) is fixedly connected with the main plate body (1), a second plug-in part (7) is arranged at the other end of each second transverse connecting sheet (3), a plurality of anchor bars (4) are arranged on one side of the main plate body (1) facing the wall body (20), one end of each anchor bar (4) is fixedly connected with the main plate body (1), and the other end of each anchor bar (4) is a penetrating end matched with the wall body (20).
2. The post-configuration reinforcement unit for a ring beam according to claim 1, characterized by: The plurality of anchor bars (4) are arranged in a matrix form on one side of the main plate body (1) facing the wall body (20).
3. The post-configuration reinforcement unit for a ring beam according to claim 1, characterized in that: The first plug-in part (5) is a first plug-in hole, the second plug-in part (7) is a second plug-in hole, and the shape of the first plug-in hole is the same as that of the second plug-in hole.
4. The post-formed ring beam reinforcing unit according to claim 1, wherein: The main plate body (1) is a steel plate, and the first transverse connecting sheet (2) and the second transverse connecting sheet (3) are steel sheets.
5. The reinforcing unit for a post-configuration ring beam according to claim 1 or 4, characterized in that: The side of the first transverse connecting sheet (2) facing the wall body (20) is arranged in flush with the side of the main plate body (1) facing the wall body (20), and the side of each second transverse connecting sheet (3) facing the wall body (20) is arranged in flush with the side of the main plate body (1) facing the wall body (20).
6. The post-configuration reinforcement unit for a ring beam according to claim 5, characterized in that: The thickness of the first transverse connecting sheet (2) is smaller than that of the main plate body (1).
7. A fabricated reinforced ring beam, consisting of the reinforcement unit for a ring beam after configuration according to any one of claims 1 to 6, characterized in that: The plurality of reinforcing units for circle beams, the plurality of first plug-in rods (8) and the plurality of second plug-in rods (9) are arranged on the top of the wall body (20) along the length direction of the wall body (20). Each rear configuration circle beam reinforcing monomer comprises a main plate body (1), a first transverse connecting sheet (2), two second transverse connecting sheets (3) and a plurality of anchor bars (4), the main plate body (1) is a long strip plate body, the first transverse connecting sheet (2) is arranged at one end of the main plate body (1), one end of the first transverse connecting sheet (2) is fixedly connected with the main plate body (1), the other end of the first transverse connecting sheet (2) is a plug-in end, a first plug-in part (5) is arranged on the first transverse connecting sheet (2), the first plug-in part (5) is arranged close to the main plate body (1), the two second transverse connecting sheets (3) are arranged horizontally at the other end of the main plate body (1) from top to bottom, a plug-in gap (6) is formed between the two second transverse connecting sheets (3), one end of each second transverse connecting sheet (3) is fixedly connected with the main plate body (1), the other end of each second transverse connecting sheet (3) is provided with a second plug-in part (7), a plurality of anchor bars (4) are arranged on one side of the main plate body (1) facing the wall body (20), one end of each anchor bar (4) is fixedly connected with the main plate body (1), the other end of each anchor bar (4) is a penetrating end matched with the wall body (20); When one end of one rear configuration circle beam reinforcing monomer is inserted into the plug-in gap (6) between the two second transverse connecting sheets (3) of one rear configuration circle beam reinforcing monomer adjacent thereto through the first transverse connecting sheet (2), the first plug-in part (5) on the first transverse connecting sheet (2) is in communication with the two second plug-in parts (7) adjacent thereto above and below to form a first plug-in channel, and a first plug rod (8) is detachably connected in the first plug-in channel; when the other end of one rear configuration circle beam reinforcing monomer is connected with the first transverse connecting sheet (2) of another rear configuration circle beam reinforcing monomer adjacent thereto through the plug-in gap (6) between the two second transverse connecting sheets (3), the two second plug-in parts (7) on the two second transverse connecting sheets (3) are arranged above and below the first plug-in part (5) in the first transverse connecting sheet (2) respectively, and the second plug-in channel is formed in communication between the two second plug-in parts (7) and the first plug-in part (5), and a second plug rod (9) is detachably connected in the second plug-in channel.