CN217479975U - Double-layer template system for uniform-section thin-wall hollow pier - Google Patents
Double-layer template system for uniform-section thin-wall hollow pier Download PDFInfo
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- CN217479975U CN217479975U CN202221246187.XU CN202221246187U CN217479975U CN 217479975 U CN217479975 U CN 217479975U CN 202221246187 U CN202221246187 U CN 202221246187U CN 217479975 U CN217479975 U CN 217479975U
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Abstract
The utility model relates to a hollow mound double-deck template system of uniform cross section thin wall for the construction of high pier stud especially is used for the hollow pier stud of uniform cross section thin wall. The utility model discloses by template enclosure truss structure, steel form, hoisting frame, hydraulic jack lift system, and the tetrafluoroethylene panel is constituteed, wherein the polytetrafluoroethylene panel mounting between steel form and concrete, the polytetrafluoroethylene panel is fixed in the concrete surface through the countersunk bolt, promotes through wedge block formula jack with the exterior sheathing that the enclosure concreties, the utility model discloses a promotion and the concrete contactless of high pier stud exterior sheathing have avoided the sliding friction to the concrete surface, have solved the template and caused concrete appearance defect in the concrete surface friction that the sliding template construction technology was not solidified completely, can realize the high-efficient construction of the hollow mound of bridge thin wall.
Description
Technical Field
The utility model belongs to bridge pier stud construction field, concretely relates to hollow mound construction of uniform cross section thin wall.
Background
The large-scale construction of traffic engineering, especially mountain area expressway bridge tunnel than is higher and higher, high pier stud is huge in the highway construction of the noble plateau of cloud. With the development of thin-wall hollow piers of more than 40m from expressway to deep-mountain canyon, the method is very common. The construction template that present high pier stud used mainly has mould, slip form and creeping formwork, and each mould of mould construction that turns over all will experience dismantling and installing of template, and is the artifical dismantlement of tower crane cooperation and installation, and high altitude construction safety risk is great, and frequent dismouting template also leads to the efficiency of construction to be lower. The creeping formwork construction is high in mechanization degree, but the formwork is lifted and closed again after the formwork leaves the concrete surface after the concrete is fully solidified, the creeping formwork equipment is high in manufacturing cost and low in construction efficiency due to the influence of the age of the concrete, and the average speed of the creeping formwork and the creeping formwork in the construction of the thin-wall hollow pier is hardly more than 1m per day. The construction of the sliding template is directly performed on the surface of the insufficiently solidified concrete through the template, the construction is not influenced by age and is very efficient, but the template directly rubs on the surface of the insufficiently solidified concrete to cause poor appearance quality or quality defects of the pier column. The pier column construction process which is high in efficiency and can ensure quality safety becomes a new market demand. A brand-new high pier stud construction technology is developed based on the advantages of the existing turnover formwork, creeping formwork and sliding formwork, and has considerable economic and social values.
Disclosure of Invention
The utility model aims at providing an efficient template system can realize the high-efficient construction of the hollow mound of thin wall, can guarantee again that pier stud construction quality includes concrete appearance quality.
The utility model discloses a hollow mound double-deck template system of uniform cross section thin wall, this system of its characterized in that is by outer surrounding template system 12, interior surrounding template system 1), three major parts of module system are constituteed in the polytetrafluoroethylene, specifically as follows:
the peripheral ring template system is characterized in that a peripheral ring truss 1 is formed by trusses which are orthogonally enclosed on four sides, inverted L-shaped lifting frames 2 are uniformly distributed on the peripheral ring truss 1, and a peripheral ring steel template 3 is arranged on the inner side of the peripheral ring truss 1;
the inner enclosure truss 13 of the inner enclosure template system 16 and the inner enclosure steel templates 14 arranged outside the inner enclosure truss 13 are formed, and the inverted L-shaped hoisting frames 2 are uniformly distributed and arranged on the inner enclosure truss;
a wedge block type jack 4 is arranged on the cross beam of the inverted L-shaped lifting frame 2, and a support rod 5 is embedded in the vertical direction;
the peripheral ring template system is also provided with an upper operating platform and a lower operating platform, the periphery of the operating platform is provided with a guardrail 7, the lower operating platform is provided with a platform suspender 10, and the operating platform is also provided with a reserved channel 8;
an inner operation platform is arranged in the inner enclosure template system and is divided into an upper part and a lower part which are communicated through a connecting stair 15;
the polytetrafluoroethylene module is divided into a straight module 22 and a corner module 23, wherein the straight module 22 and the corner module 23 are mutually buckled, hung, assembled and installed in the inner cavity of the thin-wall hollow pier, and the other one is installed outside the thin-wall hollow pier and only formed by assembling the straight module 22;
the flat module 22 and the corner module 23 are also reserved with countersunk bolt tapered holes 21, vertical square holes 19 of the modules are uniformly arranged at the centers of the thicknesses of the upper edges and the lower edges of the flat module and the corner module, two horizontal square holes 20 of the modules are respectively arranged at the left side and the right side, and square neodymium magnets are embedded in the square holes.
The aperture of the vertical square hole and the horizontal square hole of the module is 10mm × 2mm, the depth of the square neodymium magnet is 60mm, the square neodymium magnet is 10mm × 2mm × 50mm, the magnetic poles of the neodymium magnets embedded in all the square holes at the upper edge and the lower edge of the module are consistent in direction, and the magnetic poles of the neodymium magnets embedded at the left edge and the right edge are also consistent in direction.
The periphery of the uniform-section thin-wall hollow pier adopts a truss enclosure, a lifting frame, a hydraulic jack, an oil pump and the like to form a support framework of an outer formwork and has lifting power, the integral lifting of the enclosure is realized through the lifting frame embedded in the pier stud, the outer enclosure steel formwork is solidified on the outer enclosure truss, and the outer enclosure steel formwork system is integrally lifted on the lifting frame through a block type jack; the inner chamber of the hollow mound of thin wall passes through the truss enclosure, the sheet steel, the hoisting frame, hydraulic jack, constitute the inner chamber steel mould such as oil pump, outer steel mould and inner chamber steel mould form the atress system that the mound wall was pour, the centre form of assembling by polytetrafluoroethylene modularization panel in the surface mounting one deck of outer steel mould and inner chamber steel membrane, this centre form is between concrete and steel mould, the relative concrete of centre form is fixed, the inner form is dismantled according to the piece and again realize the centre form circulation at the suitable for reading installation after steel form promotion back inner form exposes from the steel mould end opening.
The inner template is assembled by the shaped modular polytetrafluoroethylene template on the surface of the steel mould to form the inner template for isolating concrete and the steel template, and because the neodymium magnet embedded in the polytetrafluoroethylene template can be adsorbed on the surface of the steel mould. The sliding friction coefficient with the steel form is minimum in vertical going up, and the toper bolt hole is reserved to the lower part in the polytetrafluoroethylene module board, and the nut direct mount of countersunk bolt and concrete side is downthehole at the bolt, and the nut just is buried in the concrete behind the concreting to be fixed in the concrete surface with the polytetrafluoroethylene module board, the steel form promotes the in-process and dismantles and install the top realization circulation in the steel form through constantly with the polytetrafluoroethylene module board that the end opening exposes.
The length of the modularized polytetrafluoroethylene board is 1.5-2 m, the height is 40cm, the thickness is 6-8 mm, neodymium magnets are embedded in the polytetrafluoroethylene module board along the periphery of the board thickness through uniform square chisel holes, vertical occlusion is achieved by arranging concave-convex rabbets on the upper edge and the lower edge of the inner template, and the concave-convex rabbets can be horizontally closed and detached. In order to realize that the inner template can vertically slide relative to the outer steel mould and is always fixed on the surface of concrete, wedge-shaped round holes are reserved at the position 100mm away from the lower edge of the polytetrafluoroethylene module plate, the wedge-shaped round holes are horizontally arranged according to the distance of 50cm-70cm, and embedded countersunk bolts are M6 or M8.
An operation platform, a hydraulic system and a control system are integrated on the peripheral ring steel template system. The outer steel template system is characterized in that an enclosure is formed by steel trusses enclosed on four sides, purlines and smooth stainless steel plates are arranged inside the enclosure, and the thickness of each steel plate is 4-5 mm. 8-12 inverted L-shaped steel lifting frames are uniformly arranged on the enclosure. The hoisting frame is formed by welding HN steel, channel steel and steel plates, wedge-type jacks are mounted at the ends of beam ends of the channel steel, seamless steel pipes with the diameter of 48 x 3.5 penetrate through the middle of the wedge-type jacks, the steel pipes are directly embedded in pier column concrete, the supporting steel pipes can sleeve pier column steel bars and cement mortar is used for filling the insides of the steel pipes in the construction process. All jacks are connected to the synchronous oil cylinder through high-pressure oil pipes, synchronous oil supply can be achieved through all the jacks, synchronous lifting is achieved, independent oil supply of a single jack is achieved through an additional pipeline, in order to achieve leveling in the process, and large prisms are arranged at four corners of the enclosure truss and used for monitoring perpendicularity.
Operation platform directly sets up in the upper and lower side of enclosing, and the top is through setting up the bed board, peripheral installation safety protection railing and the protection network on the enclosing, and the railing bottom sets up the baseboard, forms operation platform. The hydraulic press electric system is reasonably distributed in the enclosure truss. The lower operating platform is formed by arranging a suspender on the enclosure to hang a lower cross rod and a floor, installing a protective guard and a protective net. The control system mainly comprises a plane position and a verticality control device, wherein vertical rods are arranged at four corners of the enclosure, the enclosure is fixed at the same height through mutually communicated transparent graduated tubes, a transparent clean water body is injected with dyeing in the communicating tube, whether the enclosure is kept horizontal or not is judged through the liquid level of the water body in the communicating tube, and the enclosure is leveled through an adjusting jack if deviation occurs. Two diagonal angles of enclosure set up the wire rope hammer ball, hammer ball weight 20kG, and the wire rope is rolled up and is installed on the enclosure, and the wire rope is constantly given off to the in-process that rises, guarantees the fixed ground clearance of hammer ball, measures the ground clearance of enclosure constantly through the wire rope length of giving off simultaneously.
The steel die in the inner cavity of the thin-wall hollow pier is similar to the outer steel die in structure, but the hammer ball is not arranged on the inner steel die system.
The equal-section thin-wall hollow pier double-layer system mainly realizes the separation of the vertical lifting and horizontal supporting functions of the template system, and realizes the continuous construction of pier wall concrete by using two layers of templates. Contrast turnover formwork and creeping formwork have and do not receive the influence of concrete age, and the advantage that whole construction speed is fast, and the construction of contrast sliding template has then fundamentally guaranteed concrete appearance quality, other advantages of this set of system: the manufacturing cost is low, the mechanization degree is high, the mechanism is stable, the operation is simple and convenient, and the method can be widely applied to the equal-section high pier stud.
Drawings
FIG. 1 is a schematic diagram of a peripheral ring template system;
FIG. 2 is a schematic view of the upper operating platform of the peripheral ring template;
FIG. 3 is a schematic view of the lower operating platform of the peripheral ring template;
FIG. 4 is a schematic view of the peripheral ring template system assembly;
FIG. 5 is a schematic view of an inner ring template system;
FIG. 6 is a schematic view of the upper and lower operation platforms of the inner enclosure template;
FIG. 7 is a schematic view of the assembly of the inner ring template;
FIG. 8 is a schematic structural view of a flat module;
FIG. 9 is a schematic structural diagram of a corner module;
FIG. 10 is a schematic diagram of the assembly of a straight module and a corner module on a thin-walled hollow pier with equal cross section;
fig. 11 is a general installation schematic.
In the figure: 1-peripheral ring truss, 2-inverted L-shaped lifting frame, 3-peripheral ring steel template, 4-wedge block type jack, 5-embedded support rod, 6-upper operation platform laying plate, 7-operation platform guardrail, 8-reserved channel, 9-lower operation platform laying plate, 10-lower operation platform suspender, 11-lower platform guardrail, 12-peripheral ring template system, 13-inner ring truss, 14-inner ring steel template, 15-inner cavity platform connecting stair, 16-inner ring template system, 17-module concave rabbet, 18-module convex rabbet, 19-module vertical square hole, 20-module horizontal square hole, 21-module reserved conical screw hole, 22-straight module and 23-corner module.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1
As shown in fig. 1-11, the inner peripheral template system consists of three major parts, namely an outer peripheral template system 12, an inner peripheral template system 16 and polytetrafluoroethylene inner modules 22 and 23. The peripheral ring template system 12 comprises a peripheral ring steel truss 1, an inverted L-shaped lifting frame 2, a peripheral ring steel template 3, a wedge-type jack 4 and an embedded supporting rod 5 in the figure I; in the second figure, an operation platform paving plate 6, an operation platform guardrail 7 and a reserved channel 8 are arranged on the outer enclosure; in the third figure, the lower operation platform of the outer enclosure consists of a paving plate 9, a lower operation platform suspender 10 and a lower platform guardrail 11. The inner cavity template system consists of an inverted L-shaped lifting frame 2 in the figure five, a wedge-shaped jack 4, an embedded supporting rod 5, an inner cavity enclosure steel template 13, an inner cavity enclosure steel template 14, platform paving plates 6 in the figure six of an upper inner operation platform and a lower inner operation platform, operation platform guardrails 7, a lower operation platform paving plate 9, a lower operation platform suspender 10, a lower platform guardrail 11 and an inner cavity platform connecting stair 15. The polytetrafluoroethylene inner mold system is shown in the overall assembly schematic view, the polytetrafluoroethylene inner mold system is formed by assembling polytetrafluoroethylene flat modules 22 and polytetrafluoroethylene corner modules 23 through concave-convex rabbets, the polytetrafluoroethylene flat modules 22 are shown in the figure, the thickness of a polytetrafluoroethylene plate is selected to be 6mm, the upper edge of each module concave rabbet 17 is provided, each module concave rabbet 17 can be vertically locked with other module convex rabbets 18 and can be freely installed and detached in the horizontal direction, in addition, a countersunk bolt conical hole is reserved in each module, a countersunk bolt M6 or M8 is adopted, the length is 60mm-80mm, nuts in embedded concrete are matched with corresponding lengths, and anchor plates with the diameter of 30mm are installed at the other ends of the nuts. The vertical square holes 19 of the module are uniformly arranged in the center of the thickness of the upper edge and the lower edge of the module, the depth of the square hole is 10mm x 2mm and is 60mm, and the horizontal square holes 20 of the two modules are arranged on the left side and the right side of the module respectively, and the sizes of the square holes are consistent with those of the square holes 19. The square holes are embedded with 10mm 2mm 50mm square neodymium magnets, the directions of the magnetic poles of the neodymium magnets embedded in all the square holes at the upper and lower edges of the module are consistent, and the directions of the magnetic poles of the neodymium magnets embedded at the left and right edges are also consistent.
The thin-wall hollow pier is generally provided with a 2-2.5 m solid section on a bearing platform, the mounting position of an outer surrounding ring template is positioned by measuring and paying off, an outer surrounding ring template system and an upper operating platform are mounted, a polytetrafluoroethylene flat module 22 is assembled and adsorbed on the surface of a steel template, a support rod is inserted into a block type jack 4, concrete is poured inside the polytetrafluoroethylene after pier stud reinforcing steel bars are mounted, oil can be synchronously supplied to a wedge block jack after final setting to lift the outer surrounding ring template system, a polytetrafluoroethylene inner module is continuously mounted on the upper portion of the outer surrounding ring template, reinforcing steel bars and concrete are continuously mounted in a pier column, a countersunk bolt is manually unscrewed and the polytetrafluoroethylene module is detached after the lower polytetrafluoroethylene flat module 22 is completely separated from the outer surrounding ring template, and the outer surrounding ring lower lifting operating platform is mounted when the lifting height of the outer surrounding ring template reaches 2 m. The outer surrounding ring template system is lifted to the top of the solid section, the position of the inner surrounding ring template is located through measurement, the inner surrounding ring template system and the upper operating platform are installed, the polytetrafluoroethylene flat module 22 is installed inside the steel template in the follow-up process, and the polytetrafluoroethylene corner module 23 is assembled into the inner mold. And then, installing reinforcing steel bars and pouring concrete between the polytetrafluoroethylene inner moulds, and then installing the reinforcing steel bars and lifting the enclosure steel template system, wherein the polytetrafluoroethylene inner modules of the outer part and the inner cavity are continuously dismounted and installed above the enclosure steel mould after being exposed at the lower part of the enclosure steel mould, so that the construction of the pier wall is continuously circulated. After the inner steel mould reaches the position of the transverse partition plate, the inner cavity template system is directly lifted for 2m along the climbing rod, the transverse partition plate is poured by adopting a conventional method, the inner cavity is behind through the transverse partition plate, and the hollow section is continuously poured by adopting the lifting of the surrounding mould and the disassembly and assembly cycle of the polytetrafluoroethylene module. The outer form is lifted all the way to the pier top. After the inner cavity template system finishes pouring of the last cavity pier wall, the lifting enclosure steel mold system is supported by the section steel crosspiece, and then the inner cavity steel mold system is detached and then is transported to the ground by the tower crane. The outer surrounding ring steel mold system is lifted to the pier top and continues to climb the outer surrounding ring until the surrounding ring is separated from the pier top to remove all polytetrafluoroethylene modules, the traction hoisting system on the pier top is adopted to fasten the whole set of outer steel mold system, then the hoisting frame is removed, the supporting rod exceeding the pier top is cut, the whole set of outer mold system is lowered to the bottom surface through the pier-top hoisting system and then removed, and polytetrafluoroethylene plates with the thickness of 2mm are padded around the surrounding ring mold in the lower process.
Example 2
The thin-wall hollow pier double-layer template system is shown in figures 1-11 and mainly comprises an outer peripheral ring template system 12, an inner peripheral ring template system 16 and polytetrafluoroethylene inner modules 22 and 23. The outer enclosure template system 12 comprises an outer enclosure steel truss 1, an inverted L-shaped lifting frame 2, an outer enclosure steel template 3, a wedge-type jack 4 and an embedded support rod 5 in the figure I; in the second figure, an operation platform paving plate 6, an operation platform guardrail 7 and a reserved channel 8 are arranged on the outer peripheral ring; in the third figure, the lower operation platform of the outer enclosure consists of a paving plate 9, a lower operation platform suspender 10 and a lower platform guardrail 11. The inner cavity template system consists of an inverted L-shaped lifting frame 2 in a fifth drawing, a wedge-shaped jack 4, an embedded support rod 5, an inner cavity enclosure steel template 13, an inner cavity enclosure steel template 14, platform paving plates 6 in an upper inner operation platform drawing and a lower inner operation platform drawing, an operation platform guardrail 7, a lower operation platform paving plate 9, a lower operation platform suspender 10, a lower platform guardrail 11 and an inner cavity platform connecting stair 15. The polytetrafluoroethylene inner mold system is shown in the overall assembly schematic view, the polytetrafluoroethylene inner mold system is formed by assembling polytetrafluoroethylene flat modules 22 and polytetrafluoroethylene corner modules 23 through concave-convex rabbets, the polytetrafluoroethylene flat modules 22 are shown in the figure, the thickness of a polytetrafluoroethylene plate is 8mm, the upper edge of each module concave rabbet 17 is provided with a module concave rabbet 17, the module concave rabbet can be vertically locked with other module convex rabbets 18 and can be freely installed and detached in the horizontal direction, in addition, a countersunk bolt conical hole is reserved in each module, a countersunk bolt M6 or M8 is adopted, the length is 60mm-80mm, nuts in embedded concrete are matched with corresponding lengths, and anchor plates with the diameter of 30mm are installed at the other ends of the anchor plates. The vertical square holes 19 of the module are uniformly arranged at the center of the thickness of the upper edge and the lower edge of the module, the depth of the square hole is 70mm from 10mm to 3mm, and the sizes of the horizontal square holes 20 of the two modules are consistent with the sizes of the square holes 19. The square holes are embedded with 10mm 3mm 60mm square neodymium magnets, the directions of the magnetic poles of the neodymium magnets embedded in all the square holes at the upper and lower edges of the module are consistent, and the directions of the magnetic poles of the neodymium magnets embedded at the left and right edges are also consistent.
The thin-wall hollow pier is generally provided with a 2-2.5 m solid section on a bearing platform, the mounting position of an outer surrounding ring template is positioned by measuring and paying off, an outer surrounding ring template system and an upper operating platform are mounted, a polytetrafluoroethylene flat module 22 is assembled and adsorbed on the surface of a steel template, a support rod is inserted into a block type jack 4, concrete is poured inside the polytetrafluoroethylene after pier stud reinforcing steel bars are mounted, oil can be synchronously supplied to a wedge block jack after final setting to lift the outer surrounding ring template system, a polytetrafluoroethylene inner module is continuously mounted on the upper portion of the outer surrounding ring template, reinforcing steel bars and concrete are continuously mounted in a pier column, a countersunk bolt is manually unscrewed and the polytetrafluoroethylene module is detached after the lower polytetrafluoroethylene flat module 22 is completely separated from the outer surrounding ring template, and the outer surrounding ring lower lifting operating platform is mounted when the lifting height of the outer surrounding ring template reaches 2 m. When the outer surrounding ring template system is lifted to the top of the solid section, the position of the inner surrounding ring template system is located through measurement, the inner surrounding ring template system and the upper operating platform are installed, a polytetrafluoroethylene straight module 22 is installed inside the steel template, and a polytetrafluoroethylene corner module 23 is assembled into an inner template. And then, installing reinforcing steel bars and pouring concrete between the polytetrafluoroethylene inner moulds, and then, installing the reinforcing steel bars and then lifting the steel formwork system of the enclosure, wherein the polytetrafluoroethylene inner modules of the outer part and the inner cavity are continuously dismounted and installed above the steel formwork system after being exposed at the lower part of the steel formwork system of the enclosure, so that the construction of the pier wall of the upward item is continuously circulated. After the inner steel mold reaches the position of the transverse partition plate, the inner cavity template system is directly lifted for 2m along the climbing rods and then the transverse partition plate is poured by adopting a conventional method, and after the inner cavity passes through the section of the transverse partition plate, the hollow section is continuously poured by adopting the lifting of the surrounding ring mold and the dismounting and mounting circulation of the polytetrafluoroethylene module. The outer form is lifted all the way to the pier top. After the inner cavity template system finishes pouring of the last cavity pier wall, the lifting enclosure steel mold system is supported by the section steel crosspiece, and then the inner cavity steel mold system is detached and then is transported to the ground by the tower crane. After the peripheral ring template system is lifted to the pier top, the peripheral ring template system is fixed in an auxiliary mode through ropes, and then all the parts are transported to the ground after being detached through cooperation of a tower crane.
Claims (2)
1. The utility model provides a hollow mound double-deck template system of uniform cross section thin wall, its characterized in that this system comprises outer surrounding template system (12), interior surrounding template system (16), module system three major parts in the polytetrafluoroethylene, specifically as follows:
the peripheral ring template system is characterized in that a peripheral ring truss (1) is formed by trusses which are orthogonally enclosed on four sides, inverted L-shaped lifting frames (2) are uniformly distributed on the peripheral ring truss (1), and a peripheral ring steel template (3) is installed on the inner side of the peripheral ring truss (1);
the inner enclosure truss (13) of the inner enclosure template system (16) and the inner enclosure steel templates (14) installed on the outer side of the inner enclosure truss (13) are formed, and the inverted L-shaped lifting frames (2) are uniformly distributed and installed on the inner enclosure truss;
a wedge block type jack (4) is arranged on the cross beam of the inverted L-shaped lifting frame (2), and a support rod (5) is embedded in the vertical direction;
the peripheral ring template system is also provided with an upper operating platform and a lower operating platform, the periphery of the operating platform is provided with a guardrail (7), the lower operating platform is provided with a platform suspender (10), and the operating platform is also provided with a channel (8);
an inner operation platform is arranged in the inner enclosure template system and is divided into an upper part and a lower part which are communicated through a connecting stair (15);
the polytetrafluoroethylene module is divided into a straight module (22) and a corner module (23), wherein the straight module (22) and the corner module (23) are mutually buckled, hung, assembled and installed in the inner cavity of the thin-wall hollow pier, and the other one is installed outside the thin-wall hollow pier and is only assembled by the straight module (22);
countersunk bolt tapered holes (21) are reserved on the straight module (22) and the corner module (23), vertical square holes (19) of the modules are uniformly distributed in the centers of the thicknesses of the upper edges and the lower edges of the straight module and the corner module, two horizontal square holes (20) of the modules are respectively distributed on the left side and the right side, and square neodymium magnets are embedded in the square holes.
2. The double-deck template system of claim 1, wherein the module vertical and horizontal square holes have a diameter of 10mm x 2mm and a depth of 60mm, the square neodymium magnets have a diameter of 10mm x 2mm x 50mm, the magnetic poles of the neodymium magnets embedded in all the square holes on the upper and lower edges of the module are in the same direction, and the magnetic poles of the neodymium magnets embedded on the left and right edges are also in the same direction.
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| CN202221246187.XU CN217479975U (en) | 2022-05-23 | 2022-05-23 | Double-layer template system for uniform-section thin-wall hollow pier |
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| CN202221246187.XU CN217479975U (en) | 2022-05-23 | 2022-05-23 | Double-layer template system for uniform-section thin-wall hollow pier |
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