A connecting device for prefabricated buildings

Abstract

The present invention provides a connecting device for prefabricated buildings, which relates to the technical field of connecting devices and includes a main connecting rod and several secondary connecting rods. Reinforcing bar perforations for connecting reinforcing bars are provided at both the upper and lower ends of the main connecting rod and the secondary connecting rods. Series connection seats are arranged on the bodies of the main connecting rod and the secondary connecting rods, and a series connection pipe is arranged between every two series connection seats. Exhaust components for discharging gas are installed on the upper sides of the bodies of the main connecting rod and the secondary connecting rods, and a feeding component for pouring slurry is arranged on the lower side of the body of the main connecting rod. In this application, slurry can be added through the feeding component so that the slurry enters the main connecting rod. Among them, the required number of secondary connecting rods can be connected in series by using the series connection pipe, and the slurry is poured into each secondary connecting rod in sequence, so as to realize the support between the connecting device and the reinforcing bars. Compared with the existing connecting device, this application can effectively improve the support strength at the joints of prefabricated buildings, and further improve the overall support strength of prefabricated buildings.

Description

Technical Field

[0001] The present invention relates to the technical field of connection devices, and in particular to a connection device for assembled buildings. Background Art

[0002] Prefabricated buildings include assembly columns and assembly walls, and steel bars will extend from the assembly points, and then the prefabricated buildings will be combined with connecting devices. For example, patent announcement number CN212743150U is a positioning device for prefabricated assembly column steel bar sleeve connectors, which involves the installation field of steel bar sleeves, including prefabricated assembly columns and prefabricated steel bars, as well as fixed columns and positioning steel bars. The prefabricated steel bars are provided with connecting parts, and the prefabricated assembly columns are provided with positioning components; during on-site construction, the position of the prefabricated assembly column is limited by the positioning component, the prefabricated assembly column is placed on the fixed column, the positioning steel bar and the prefabricated steel bar are connected together by the connecting parts, and then the construction is completed by pouring slurry.

[0003] Although the above-mentioned connecting device can align and connect the assembly columns during the connection process, after the connection is completed, the slurry can be covered on the outside of the connecting device when pouring, resulting in the connection between the connecting device and the steel bars connected to it being insufficient in strength relative to the outside. For this reason, the present application designs a connecting device for prefabricated buildings, which can pour slurry between the connecting device and the steel bars to improve the overall strength of the prefabricated building. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a connection device for prefabricated buildings, which solves the problem of insufficient support strength at the junction between the existing connection device and the steel bars.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A connection device for prefabricated buildings includes a main connecting rod and several secondary connecting rods. The upper and lower ends of the main connecting rod and the secondary connecting rod are provided with steel bar through-holes for connecting steel bars. The rod bodies of the main connecting rod and the secondary connecting rod are both provided with series seats. A series pipe is provided between each two series seats. The upper sides of the rod bodies of the main connecting rod and the secondary connecting rod are both installed with exhaust assemblies for exhausting gas. The lower side of the rod body of the main connecting rod is provided with a feeding assembly for pouring slurry.

[0007] Preferably, locking sleeves are provided at both ends of the series pipes, the locking sleeves are threadedly matched with adjacent series seats, and the series seats are threadedly connected to the connecting elbows and the sealing covers.

[0008] Preferably, a filling cavity is provided inside the main connecting rod and the secondary connecting rod, and a plurality of reinforcing ribs are provided on the inner wall of the filling cavity.

[0009] Preferably, guiding covers are respectively installed on the upper and lower sides of the filling cavity. A plurality of diversion grooves are formed on one side of the guiding cover. An activity groove is formed at one end of the diversion groove, and an activity rod is movably installed inside the activity groove.

[0010] Preferably, locking seats and push plates are respectively installed at both ends of the activity rod. A contraction spring is arranged between the push plate and the inner wall of the activity groove. The reinforcing bars are jointly clamped inside a plurality of the locking seats.

[0011] Preferably, the feeding assembly includes a feeding pipe. The feeding pipe is fixedly installed on the lower side of the main connecting rod body. A docking jack is arranged at the opening of the feeding pipe. A limiting ring is arranged at one end of the feeding pipe. An interaction cavity is formed between the limiting ring and the docking jack, and a check baffle is arranged inside the interaction cavity.

[0012] Preferably, a check spring is fixedly installed between one side of the check baffle and the limiting ring. An activity column is fixedly installed on the other side of the check baffle, and a support wire mesh is fixedly installed at one end of the activity column.

[0013] Preferably, the exhaust assembly includes an exhaust pipe. The exhaust pipe is fixedly installed on the upper sides of the adjacent main connecting rod and secondary connecting rod bodies. A groove is formed on the inner wall of the exhaust pipe, and a moving support is movably installed inside the groove. A connecting shaft is fixedly installed at the center of the moving support, and a sealing seat is fixedly installed at one end of the connecting shaft.

[0014] Preferably, a matching ring is arranged at the opening of the exhaust pipe. The matching ring is in sealed fit with the sealing seat, and a docking seat is arranged on one side of the matching ring.

[0015] Preferably, an expansion groove is formed inside the groove, and a partition sliding plate is movably arranged inside the expansion groove. The partition sliding plate is fixedly installed at both ends of the moving support. A support spring is arranged between the moving support and the groove;

[0016] A ventilation disc is fixedly installed on the shaft body of the connecting shaft. A combination block is arranged on the outer side of the ventilation disc. A combination groove is formed on the inner wall of the docking seat, and the combination block is in docking fit with the combination groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The slurry can be added through the feeding component so that the slurry enters the main connecting rod. The required number of secondary connecting rods can be connected in series by using a series pipe, and the slurry is poured into each secondary connecting rod in turn, so as to realize the support between the connecting device and the steel bar. Compared with the existing connecting device, the present application can effectively improve the support strength at the joint of the prefabricated building, and then improve the overall support strength of the prefabricated building. The series seat can be blocked by the sealing cover to realize the closure of the internal series space. The different specifications and sizes of the secondary connecting rods can be arranged through the connecting elbow pipe, and then it is applicable to the assembled column materials. Through the above structure, the present application can be freely combined into the required size and improve its adaptability.

[0019] 2. As the slurry gradually increases, under the action of the guiding cover, part of the slurry will be introduced into the diversion groove, and the slurry will push the push plate. When the push plate moves, it will push the movable rod, so that a plurality of movable rods move towards the steel bar. The locking seat can be used to clamp the steel bar when the slurry is poured, so as to ensure that the subsequent solidification between the steel bar and the poured slurry will not be disturbed.

[0020] 3. When the spray head is taken out, the check spring supports the check baffle, so that the check baffle closes the interaction cavity again, which can effectively avoid the phenomenon of slurry backflow when the spray head is taken out, and then ensure the stability of the subsequent slurry solidification. Through the above structure, the feed pipe can be automatically closed when the pouring is completed, without manually inserting parts to block by personnel, which not only reduces the operation process but also avoids the waste of slurry.

[0021] 4. When the slurry enters the exhaust pipe, under the addition of the slurry, the current slurry will approach the air permeable disc. The air permeable disc can only discharge gas or part of the liquid, and the slurry contains a large amount of materials with large diameters, so that the air permeable disc drives the plugging seat to move under the push of the slurry until the plugging seat is hermetically fitted with the mating ring, so as to complete the discharge of most of the gas and automatically plug the exhaust port. Through the above structure, the present application can automatically perform the plugging operation on multiple secondary connecting rods. If manual plugging is used, it is impossible to technically plug multiple exhaust pipes, so that the present application is more convenient in the connection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the three-dimensional structure schematic diagram of the present invention;

[0023] [[ID=1,8]] Figure 2 is the top view structure schematic diagram of the present invention;

[0024] Figure 3 is Figure 2 the sectional structure schematic diagram at A-A in

[0025] Figure 4 [[ID= ,9]]isFigure 3 Schematic diagram of the enlarged structure at position a;

[0026] Figure 5 is Figure 3 Schematic diagram of the enlarged structure at position b;

[0027] Figure 6 is Figure 3 Schematic diagram of the enlarged structure at position c;

[0028] Figure 7 Schematic side view structure diagram of the present invention;

[0029] Figure 8 is Figure 7 Schematic sectional structure diagram at B - B in the figure;

[0030] Figure 9 is Figure 8 Schematic diagram of the enlarged structure at position d.

[0031] In the figure: 1, main connecting rod; 2, secondary connecting rod; 3, series pipe; 301, locking sleeve; 4, feeding assembly; 401, feeding pipe; 402, docking jack; 403, limiting ring; 404, movable column; 4041, support grid; 4042, check baffle; 4043, check spring; 405, interaction cavity; 5, exhaust assembly; 501, exhaust pipe; 502, groove; 5021, support spring; 5022, expansion slot; 503, mating ring; 504, moving bracket; 5041, partition slide plate; 5042, coupling shaft; 505, breathable disc; 5051, combined block; 506, plugging seat; 507, docking seat; 5071, combined groove; 6, connecting elbow; 7, sealing cover; 8, series seat; 9, filling cavity; 901, guiding cover; 902, diversion groove; 903, movable slot; 904, movable rod; 905, locking seat; 906, push plate; 907, contraction spring; 10, reinforcing rib; 11, steel bar perforation. Detailed implementation manners

[0032] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Such as Figures 1 to 9As shown in the figure, a connecting device for prefabricated buildings includes a main connecting rod 1 and several secondary connecting rods 2. Reinforcing bar perforations 11 for connecting reinforcing bars are provided at the upper and lower ends of the main connecting rod 1 and the secondary connecting rods 2. Series connection seats 8 are arranged on the bodies of the main connecting rod 1 and the secondary connecting rods 2. A series connection pipe 3 is arranged between every two series connection seats 8. Exhaust assemblies 5 for discharging gas are installed on the upper sides of the bodies of the main connecting rod 1 and the secondary connecting rods 2. A feeding assembly 4 for pouring slurry is arranged on the lower side of the body of the main connecting rod 1.

[0034] In this embodiment, locking sleeves 301 are provided at both ends of the series connection pipe 3. The locking sleeves 301 are in threaded cooperation with the adjacent series connection seats 8. The series connection seats 8 are both in threaded connection with the connecting elbow 6 and the sealing cover 7.

[0035] The slurry can be added through the feeding assembly 4 so that the slurry enters the main connecting rod 1. The series connection pipe 3 can be used to connect a required number of secondary connecting rods 2 in series, and the slurry is poured into each secondary connecting rod 2 in sequence, so as to realize the support between the connecting device and the reinforcing bars. Compared with the existing connecting device, this application can effectively improve the support strength at the connection of prefabricated buildings, and further improve the overall support strength of prefabricated buildings. The series connection seat 8 can be blocked by the sealing cover 7 to realize the closure of the internal series connection space. The connecting elbow 6 can also be used to arrange the secondary connecting rods 2 with different specifications and dimensions, so as to be applicable to assembling column-like materials. Through the above structure, this application can be freely combined into the required size to improve its adaptability.

[0036] In this embodiment, filling cavities 9 are provided inside both the main connecting rod 1 and the secondary connecting rods 2. A number of reinforcing ribs 10 are arranged on the inner walls of the filling cavities 9. After the slurry solidifies, the connection strength between the slurry and the reinforcing ribs 10 can be strengthened by the number of reinforcing ribs 10, so that the slurry inside the filling cavity 9 will not move after solidification.

[0037] Guide covers 901 are respectively installed on the upper and lower sides of the filling cavity 9. A number of diversion grooves 902 are provided on one side of the guide cover 901. An activity groove 903 is provided at one end of the diversion groove 902. An activity rod 904 is movably installed inside the activity groove 903.

[0038] Wherein, locking seats 905 and push plates 906 are respectively installed at both ends of the activity rod 904. A compression spring 907 is arranged between the push plate 906 and the inner wall of the activity groove 903. The reinforcing bars are jointly clamped inside a number of locking seats 905.

[0039] When assembling the present application, reinforcing bar perforations 11 for connecting reinforcing bars are provided at both the upper and lower ends of the main connecting rod 1 and the secondary connecting rod 2, and the reinforcing bar perforations 11 are inserted and docked with the reinforcing bars, so that the present application is connected to the assembled buildings on the upper and lower sides. After the preliminary connection is completed, slurry is pre-poured on its outer side. After it solidifies, slurry is poured into the main connecting rod 1 and the secondary connecting rod 2. During the process of pouring the slurry, as the slurry gradually increases, part of the slurry will be guided into the diversion groove 902 under the action of the guiding cover 901, and the slurry will push the push plate 906. When the push plate 906 moves, it will push the movable rod 904, so that a plurality of movable rods 904 move towards the reinforcing bar. Among them, the locking seat 905 can clamp the reinforcing bar when the slurry pouring is completed to ensure that the subsequent solidification between the reinforcing bar and the poured slurry will not be disturbed;

[0040] During connection, the push plate 906 is pushed by the contraction spring 907 to make the movable rod 904 away from the reinforcing bar perforation 11, so as to ensure that the movable rod 904 will not block the entry of the reinforcing bar when the reinforcing bar is inserted into the reinforcing bar perforation 11.

[0041] In this embodiment, the feeding assembly 4 includes a feeding pipe 401. The feeding pipe 401 is fixedly installed on the lower side of the rod body of the main connecting rod 1. A docking jack 402 is provided at the opening of the feeding pipe 401. A limiting ring 403 is provided at one end of the feeding pipe 401. An interaction cavity 405 is provided between the limiting ring 403 and the docking jack 402, and a check baffle 4042 is arranged inside the interaction cavity 405.

[0042] It should be noted that a check spring 4043 is fixedly installed between one side of the check baffle 4042 and the limiting ring 403, and a movable column 404 is fixedly installed on the other side of the check baffle 4042. A support grid 4041 is fixedly installed at one end of the movable column 404.

[0043] When pouring the slurry, first insert the pouring nozzle into the docking jack 402. As the nozzle is inserted, it pushes the support grid 4041 and the movable column 404, so that the check baffle 4042 opens the current interaction cavity 405, and then the slurry can enter the interaction cavity 405 for pouring the slurry. Among them, through the support grid 4041, the check baffle 4042 can move stably without disturbing the entry of the slurry. After the pouring operation is completed, when the nozzle is taken out, at the same time of taking out, the check baffle 4042 is supported by the check spring 4043, so that the check baffle 4042 closes the interaction cavity 405 again, which can effectively avoid the phenomenon of slurry backflow when the nozzle is taken out, and then ensure the stability of the subsequent slurry solidification. Through the above structure, the feeding pipe 401 can be automatically closed when the pouring is completed, without manually inserting parts to block by personnel, which not only reduces the operation process but also avoids the waste of slurry.

[0044] In this embodiment, the exhaust assembly 5 includes an exhaust pipe 501, which is fixedly installed on the upper side of the adjacent main connecting rod 1 and secondary connecting rod 2 rod bodies. A groove 502 is formed in the inner wall of the exhaust pipe 501, and a moving bracket 504 is movably installed inside the groove 502. A connecting shaft 5042 is fixedly installed at the center of the moving bracket 504, and a plugging seat 506 is fixedly installed at one end of the connecting shaft 5042.

[0045] Specifically, a mating ring 503 is arranged at the opening of the exhaust pipe 501. The mating ring 503 is in sealing fit with the plugging seat 506, and a docking seat 507 is arranged on one side of the mating ring 503.

[0046] In this application, an expansion slot 5022 is formed inside the groove 502, and a partition sliding plate 5041 is movably arranged inside the expansion slot 5022. The partition sliding plate 5041 is fixedly installed at both ends of the moving bracket 504, and a support spring 5021 is arranged between the moving bracket 504 and the groove 502;

[0047] A ventilation disc 505 is fixedly installed on the shaft body of the connecting shaft 5042. A combination block 5051 is arranged on the outer side of the ventilation disc 505, and a combination slot 5071 is formed in the inner wall of the docking seat 507. The combination block 5051 is in docking fit with the combination slot 5071.

[0048] During the process of pouring the slurry, in order to avoid the problem that the slurry is mixed with a large amount of gas and the strength decreases after solidification, it is necessary to discharge most of the gas inside the filling cavity 9 during the process of pouring the slurry. The slurry gradually rises, and the space inside the filling cavity 9 will gradually shrink. At this time, part of the gas will be discharged from the opening of the exhaust pipe 501. When the slurry rises to the height of the exhaust pipe 501, in order to avoid the leakage of the slurry, the slurry enters the exhaust pipe 501. Under the addition of the slurry, the current slurry will approach the ventilation disc 505. The ventilation disc 505 can only discharge gas or part of the liquid, and the slurry contains a large amount of large-diameter materials, so that the ventilation disc 505 drives the plugging seat 506 to move under the push of the slurry until the plugging seat 506 is in sealing fit with the mating ring 503, thereby completing the discharge of most of the gas and automatically plugging the exhaust outlet. Through the above structure, this application can perform automatic plugging operations on multiple secondary connecting rods 2. If manual plugging is used, it is impossible to technically plug multiple exhaust pipes 501, so that this application is more convenient during the connection process;

[0049] The support spring 5021 can support the moving bracket 504, so that the plugging seat 506 is away from the mating ring 503, which can ensure that the exhaust pipe 501 is always in an open state before plugging to avoid the situation that gas cannot be discharged.

[0050] By docking and matching the combination block 5051 with the combination groove 5071, during the plugging process, the slurry will come into contact with the combination block 5051 and the combination groove 5071, enabling the air-permeable disc 505 and the exhaust pipe 501 to fix it after the slurry solidifies, and the air-permeable disc 505 can also perform a supporting operation, improving the overall strength of the current structure.

[0051] The working principle of the connection device for prefabricated buildings:

[0052] During use, first, according to the requirements of steel bar distribution, the main connecting rod 1 and multiple secondary connecting rods 2 are combined using the series pipe 3 and the connecting elbow 6. After completion, reinforcing bar perforations 11 for connecting steel bars are provided at both the upper and lower ends of the main connecting rod 1 and the secondary connecting rods 2, and the reinforcing bar perforations 11 are inserted and docked with the steel bars, connecting this application to the prefabricated buildings on the upper and lower sides. After the preliminary connection is completed, slurry is pre-poured on the outside, and after it solidifies, slurry is poured into the main connecting rod 1 and the secondary connecting rods 2;

[0053] When pouring the slurry, first insert the pouring nozzle into the docking socket 402. As the nozzle is inserted, it pushes the support grid 4041 and the movable column 404, causing the check baffle 4042 to open the current interaction cavity 405, and then the slurry can enter the interaction cavity 405 for pouring. Among them, through the support grid 4041, the check baffle 4042 can move stably without interfering with the entry of the slurry;

[0054] During the process of pouring the slurry, as the slurry gradually increases, under the action of the guiding cover 901, part of the slurry will be introduced into the diversion groove 902, and the slurry will push the push plate 906. When the push plate 906 moves, it will push the movable rod 904, causing multiple movable rods 904 to move towards the steel bars. Among them, the locking seat 905 can clamp the steel bars when the pouring of the slurry is completed to ensure that the subsequent solidification between the steel bars and the poured slurry will not be interfered;

[0055] And when the pouring of the slurry is almost finished, to avoid the problem of the strength decreasing after solidification due to the mixing of a large amount of slurry, it is necessary to discharge most of the gas in the filling cavity 9 during the pouring process. As the slurry gradually rises, the space inside the filling cavity 9 will gradually shrink, and at this time, part of the gas will be discharged from the opening of the exhaust pipe 501. When the slurry rises to the height of the exhaust pipe 501, to prevent the slurry from leaking, as the slurry enters the exhaust pipe 501, under the addition of the slurry, the current slurry will approach the air-permeable disc 505. Since the air-permeable disc 505 can only discharge gas or part of the liquid, and the slurry contains a large amount of large-caliber materials, the air-permeable disc 505 drives the plugging seat 506 to move under the push of the slurry until the plugging seat 506 is hermetically fitted with the mating ring 503, completing the automatic plugging operation;

[0056] Finally, after the pouring operation is completed, when the nozzle is taken out, the check baffle 4042 is supported by the check spring 4043 while being taken out, so that the check baffle 4042 closes the interaction cavity 405 again, which can effectively avoid the phenomenon of slurry backflow when the nozzle is taken out.

[0057] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation manners here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A connecting device for prefabricated buildings, comprising a main connecting rod (1) and several secondary connecting rods (2), characterized in that: The upper and lower ends of the main connecting rod (1) and the secondary connecting rod (2) are both provided with steel bar perforations (11) for connecting steel bars. The rod bodies of the main connecting rod (1) and the secondary connecting rod (2) are both provided with series connection seats (8). A series connection pipe (3) is arranged between every two series connection seats (8). Exhaust assemblies (5) for discharging gas are installed on the upper sides of the rod bodies of the main connecting rod (1) and the secondary connecting rod (2). A feeding assembly (4) for pouring slurry is arranged on the lower side of the rod body of the main connecting rod (1). The exhaust assembly (5) includes an exhaust pipe (501). The exhaust pipe (501) is fixedly installed on the upper sides of the adjacent rod bodies of the main connecting rod (1) and the secondary connecting rod (2). A groove (502) is opened on the inner wall of the exhaust pipe (501). A moving support (504) is movably installed inside the groove (502). A connecting shaft (5042) is fixedly installed at the center of the moving support (504). A sealing seat (506) is fixedly installed at one end of the connecting shaft (5042). A mating ring (503) is arranged at the opening of the exhaust pipe (501). The mating ring (503) is in sealed fit with the sealing seat (506). A docking seat (507) is arranged on one side of the mating ring (503). An expansion slot (5022) is opened inside the groove (502). A partition sliding plate (5041) is movably arranged inside the expansion slot (5022). The partition sliding plate (504) is fixedly installed at both ends of the moving support (504). A support spring (5021) is arranged between the moving support (504) and the groove (502). A ventilation disc (505) is fixedly installed on the shaft body of the connecting shaft (5042). A combination block (5051) is arranged on the outer side of the ventilation disc (505). A combination slot (5071) is opened on the inner wall of the docking seat (507). The combination block (5051) is in docking fit with the combination slot (5071).

2. The connecting device for prefabricated buildings according to claim 1, wherein: Locking sleeves (301) are arranged at both ends of the series connection pipe (3). The locking sleeves (301) are in threaded fit with the adjacent series connection seats (8). The series connection seats (8) are both in threaded connection with the connecting elbow (6) and the sealing cover (7).

3. The connecting device for prefabricated buildings according to claim 1, characterized in that: Filling cavities (9) are opened inside both the main connecting rod (1) and the secondary connecting rod (2). A number of reinforcing ribs (10) are arranged on the inner walls of the filling cavities (9).

4. The connecting device for prefabricated buildings according to claim 3, characterized in that: Guide covers (901) are respectively installed on the upper and lower sides of the filling cavity (9). A number of diversion grooves (902) are opened on one side of the guide cover (901). An activity slot (903) is opened at one end of the diversion groove (902). An activity rod (904) is movably installed inside the activity slot (903).

5. The connecting device for prefabricated buildings according to claim 4, characterized in that: Locking seats (905) and push plates (906) are respectively installed at both ends of the activity rod (904). A contraction spring (907) is arranged between the push plate (906) and the inner wall of the activity slot (903). A number of the inner sides of the locking seats (905) jointly clamp the steel bar.

6. The connecting device for prefabricated buildings according to claim 1, characterized in that: The feeding assembly (4) includes a feeding pipe (401), the feeding pipe (401) is fixedly installed on the lower side of the rod body of the main connecting rod (1), a docking socket (402) is arranged at the opening of the feeding pipe (401), a limiting ring (403) is arranged at one end of the feeding pipe (401), an interaction cavity (405) is formed between the limiting ring (403) and the docking socket (402), and a check baffle (4042) is arranged inside the interaction cavity (405).

7. The connecting device for prefabricated buildings according to claim 6, characterized in that: A check spring (4043) is fixedly installed between one side of the check baffle (4042) and the limiting ring (403), a movable column (404) is fixedly installed on the other side of the check baffle (4042), and a support wire frame (4041) is fixedly installed at one end of the movable column (404).

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