Prefabricating process of sandwich laminated slab

Abstract

The invention relates to the technical field of wallboard prefabrication, and discloses a sandwich laminated slab prefabrication process which comprises the following steps: S1, design and material preparation: carrying out structural design according to building requirements and design specifications, and preparing required materials; s2, preparing a mold, namely preparing the mold, placing a reinforcing mesh in the mold, and mounting a lifting ring and a plurality of steel tie bars on the mesh surface of the reinforcing mesh to form a prefabricated part; according to the device, a first module and a positioning piece are arranged, a positioning block slides downwards while being attached to the inner wall of a first side plate till the positioning block cannot continue to move downwards, and then a fixing bolt is rotated till the fixing bolt in threaded connection with a first threaded groove and a second module is in threaded connection with a third threaded groove at the same time; therefore, after the single reinforcing steel bar pieces are sequentially placed in the positioning grooves and the position states of the reinforcing steel bar pieces are adjusted, the reinforcing steel bar pieces are positioned and limited to be prevented from moving in the follow-up moving, vibration screening and concrete solidification processes.

Description

Technical Field

[0001] The invention relates to the technical field of wall panel prefabrication, and in particular to a prefabrication process of a sandwich composite panel. Background Art

[0002] Precast concrete composite panels have the characteristics and advantages of excellent quality, good safety performance and low cost. They meet the national requirements of energy conservation, low carbon and sustainable development, and are in line with the development direction of residential industry modernization and improvement of human settlement quality. Sandwich composite panels are a kind of building structural material, usually composed of precast panels and cast-in-place reinforced concrete layers to form an assembled integral floor. This type of floor has good integrity, and its upper and lower surfaces are flat, which is convenient for finishing layer decoration. It is particularly suitable for high-rise buildings and large-span buildings with high requirements for overall rigidity.

[0003] The sandwich composite panel consists of three layers: the upper and lower layers are thin concrete layers with a layer of lightweight or thermal insulation material in the middle. In order to ensure its fixation, the sandwich is usually placed in cement before the concrete is fixed. However, the insulation board may move upward due to the buoyancy of the concrete. The displacement of the insulation board may cause damage to the structural integrity of the prefabricated wall panel. Gaps or voids appear between the insulation layers, which will reduce the insulation effect and thus affect the energy efficiency of the building. The displacement of the insulation board may require the construction party to rework and readjust the position of the insulation board, which will increase construction costs and time.

[0004] The insulation board in the prior art is usually fixed in position by the protruding steel bars at the bottom. However, after the existing steel bars are installed on the mold surface, they are manually adjusted by the staff. The steel bar positioning structure is simple, and the vibration generated during the subsequent concrete vibrating process to remove bubbles may cause the steel bar position to change. In addition, it is necessary to support the part that may be bent at the bottom middle end of the steel bar. The support will remain inside the concrete slab, which may cause local stress concentration in the concrete slab, thereby increasing the risk of cracks and reducing the strength of the slab. Summary of the invention

[0005] Technical issues solved

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a prefabrication process for sandwich composite panels, which can effectively solve the problems of simple positioning and easy displacement of the steel bars at both ends of the prior art composite panels and the middle support components remaining inside the concrete slab.

[0007] Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The present invention provides a prefabrication process for a sandwich laminated plate, comprising:

[0010] S1. Design and material preparation: Carry out structural design according to building requirements and design specifications, and prepare required materials, including steel mesh, concrete, sandwich materials, lifting rings, tie bars, etc.;

[0011] S2. Mould preparation: prepare the mould, ensure that the size and shape of the mould meet the design requirements, treat the mould surface to ensure smooth demoulding and component surface quality, place steel mesh in the mould, install lifting rings and multiple tie bars on the mesh surface of the steel mesh to form a prefabricated component;

[0012] S3. First layer of concrete pouring: Pour the first layer of concrete in the mold, cover with steel mesh and hanging rings, and ensure that the concrete is fully compacted to achieve the designed strength and uniformity;

[0013] S4. Laying of sandwich panels: After the first layer of concrete solidifies, lay the sandwich panels, ensuring that the perforations on the sandwich panels correspond to the tie bars and lifting rings below;

[0014] S5. Casting of the second layer of concrete: Casting of the second layer of concrete on the sandwich panel, forming concrete columns through the holes of the sandwich panel, connecting the two layers of concrete together;

[0015] S6. Curing and demoulding: Curing the precast components under appropriate conditions to ensure that the concrete reaches the designed strength. After curing, demoulding and preparation for transportation or installation are completed.

[0016] S7. Quality inspection: Conduct quality inspection on prefabricated sandwich panels, including size, strength, thermal insulation and sound insulation performance, etc.

[0017] S8, transportation and installation: transport qualified prefabricated sandwich panels to the construction site, and hoist and install them according to the construction drawings;

[0018] The prefabricated components in S2 include a carrying plate for transmission, a positioning module that meets the design requirements is detachably connected above the carrying plate, a composite plate is placed in the cavity of the positioning module, and the composite plate includes an outer concrete plate, a core plate, an inner concrete plate and a steel bar, the outer concrete plate is located at the top, the bottom end of the outer concrete plate is fixedly connected to the core plate, the bottom end of the core plate is fixedly connected to the inner concrete plate, and the inner concrete plate is provided with a steel bar inside;

[0019] The positioning module group includes a module 1 for limiting the position of the steel bar, and modules 2 are arranged at both ends of the module 1. The module 2 is connected to one side of the module through a fixing member threadedly connected to the side of the module. A positioning member fitted with the module 1 is arranged above the module 1. The positioning member and the module 1 work together to position the two ends of the steel bar in all directions. The edge of the module 2 is fixedly connected to the top of the load-bearing plate through bolts 1 evenly arranged.

[0020] Wherein, a support member for adjusting and supporting the middle part of the reinforcement member is arranged in the middle part of the second module.

[0021] Furthermore, the module 1 includes a side panel 1 fixedly connected to the upper surface of the supporting plate, both ends of the side panel 1 are provided with a thread groove 1 threadedly connected to the fixing piece, the inner wall of the side panel 1 is symmetrically provided with abutment plates movably connected thereto, a positioning rod is provided on the side of the abutment plate close to the module 2, one end of the positioning rod passes through the thread groove 2 provided on one side of the side panel, one side of the side panel is fixedly connected to the side panel 2, and a plurality of positioning grooves are evenly provided on the upper surface of the side panel 2.

[0022] Furthermore, the fixing member comprises a fixing bolt threadedly connected to the thread groove, and one end of the fixing bolt passes through the thread groove and the abutment plate and is fixedly connected to a semicircular block.

[0023] Furthermore, the top of the positioning groove is configured as an arc-shaped side for easy placement of a single steel bar, the middle of the positioning groove is configured as a rectangle to provide clear positioning for the single steel bar so that it can only move in one direction when inserted, and the lower end of the positioning groove is configured as a semicircle for easy cleaning and maintenance.

[0024] Furthermore, the positioning member includes a positioning block that is fitted with an inner wall of a side plate, the positioning block is fixedly connected to a limiting plate on its side, both ends of the positioning block are provided with threaded grooves three that are threadedly connected to fixing bolts, a plurality of limiting blocks are evenly arranged on the bottom end of the limiting plate, an annular groove is provided on the inner side of the bottom end of the limiting block, an outer ring is fixedly connected to the inner side of the annular groove, and the outer ring is connected to the inner ring via a rubber block flexibly connected to the inner wall.

[0025] Furthermore, the support member includes an eccentric rod capable of supporting the bottom end of the steel bar member, a fixed rod is fixedly connected to the middle part of the eccentric rod, one end of the fixed rod is rotatably connected to a movable block magnetically attracted to the second inner wall of the module, the other end of the fixed rod is fixedly connected to a turning handle, and a block is provided on the outer surface of the fixed rod near the turning handle to damp the rotation.

[0026] Furthermore, a limiting groove is provided on the side of the second bottom end of the module away from the steel bar member, an inner groove is provided on the side of the limiting groove, a positioning ring is slidably connected to the inner wall of the inner groove, a connecting frame is fixedly connected to the middle part of the outer side of the positioning ring, and the side of the connecting frame away from the limiting groove is fitted with the positioning rod.

[0027] Beneficial Effects

[0028] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0029] The present invention is provided with a module one and a positioning member, a staff member places the positioning member above the module one, the positioning block is fitted with the inner wall of the side panel one and slides downward, the positioning block moves downward and squeezes the back plate on the inner wall of the side panel one, and the back plate moves toward the module two. When the positioning block is completely fitted with the inner wall of the side panel one, the compression spring of the thread groove one is squeezed by the back plate and compressed to the minimum size. At this time, the thread groove three is horizontally flush with the semicircular block, and the positioning block cannot continue to move downward, and the staff then rotates the fixing bolt until the fixing bolt threadedly connected to the thread groove one and the module two is threadedly connected to the thread groove three at the same time, thereby achieving the positioning of the positioning member, and due to the limiting effect of the semicircular block, there is no need for the staff to adjust and rotate the fixing bolt, and the fixing bolt that rotates linearly can be accurately inserted into the thread groove three.

[0030] By providing a positioning piece, the positioning block drives the limit plate to move synchronously. When the positioning block is restricted by the semicircular block and cannot move further downward, the limit plate drives the limit block to move downward to fit with the positioning groove, the side of the limit block fits with the top of the positioning groove, and the bottom of the limit block fits with the middle of the inner wall of the positioning groove. The inner ring in the middle of the bottom end of the positioning groove first contacts with a single steel bar. As the limiting plate moves downward, the inner ring squeezes the rubber block. The inner ring restricted by the outer ring and the rubber block can further squeeze the outer surface of the steel bar, thereby performing all-round positioning protection on both ends of the steel bar to prevent it from rotating while reducing the possibility of deformation in the middle. At the same time, the inner ring and the ring groove form a rectangular maze, which can prevent concrete from entering the inner and outer rings.

[0031] By providing a support member, before installing a single steel bar, the staff aligns the support member with the limit groove and inserts it into the cavity surrounded by module one and module two until the movable block is magnetically attracted to the side of module two. At this time, the fixed rod is completely located inside the cavity, a part of the blocking block is engaged with the rectangular groove on the inner wall of the positioning ring, and the other part is located on the inner wall of the limit groove. The turning handle is exposed outside the limit groove, and the blocking block no longer moves after being engaged with the inner side of the rectangular groove of the positioning ring. Then, the turning handle is rotated according to the design standard, and the turning handle drives the eccentric rod and the fixed rod to rotate synchronously. The fixed rod rotates smoothly under the joint restriction of the limit groove, the positioning ring, the blocking block and the movable block until the height of the eccentric rod is adjusted to a position flush with the steel bar. Due to different design requirements, the sizes of steel bars used are different. This design can adjust the supporting height of the eccentric rod to the steel bar, thereby increasing its scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic diagram of a prefabrication process flow diagram of an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of a composite slab casting completion state according to an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of separating the stacking plate and the positioning module according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the separation of module 1 and positioning member according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of a positioning member according to an embodiment of the present invention;

[0038] Figure 6 It is a perspective schematic diagram of module 2 according to an embodiment of the present invention;

[0039] Figure 7 Schematic diagram of the support structure of an embodiment of the present invention.

[0040] The numbers in the figure represent: 1, bearing plate; 2, positioning module; 21, module 1; 211, side plate 1; 212, side plate 2; 213, positioning groove; 214, stop plate; 215, thread groove 1; 216, positioning rod; 217, thread groove 2; 22, module 2; 221, limit groove; 222, connecting frame; 223, positioning ring; 224, inner groove; 23, positioning piece; 231, positioning block; 232, thread groove 3; 233, limit Position plate; 234, limit block; 235, outer ring; 236, rubber block; 237, inner ring; 238, ring groove; 24, fixing piece; 241, fixing bolt; 242, semicircular block; 25, bolt one; 26, supporting piece; 261, eccentric rod; 262, fixing rod; 263, blocking block; 264, turning handle; 265, movable block; 3, composite plate; 31, outer concrete plate; 32, core plate; 33, inner concrete plate; 34, reinforcement piece. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The present invention will be further described below in conjunction with the embodiments.

[0043] Example:

[0044] See also Figure 1-Figure 7 , the present invention provides a technical solution: a prefabrication process of a sandwich laminated plate includes: S1, design and material preparation: structural design is performed according to building requirements and design specifications, and required materials are prepared, including steel mesh, concrete, sandwich materials (usually thermal insulation and sound insulation materials), hanging rings, tie steel bars, etc.;

[0045] S2. Mould preparation: prepare the mould, ensure that the size and shape of the mould meet the design requirements, treat the mould surface to ensure smooth demoulding and component surface quality, place steel mesh in the mould, install lifting rings and multiple tie bars on the mesh surface of the steel mesh to form a prefabricated component;

[0046] S3. First layer of concrete pouring: Pour the first layer of concrete in the mold, cover with steel mesh and hanging rings, and ensure that the concrete is fully compacted to achieve the designed strength and uniformity;

[0047] S4. Laying of sandwich panels: After the first layer of concrete solidifies, lay the sandwich panels, ensuring that the perforations on the sandwich panels correspond to the tie bars and lifting rings below;

[0048] S5. Casting of the second layer of concrete: Casting of the second layer of concrete on the sandwich panel, forming concrete columns through the holes of the sandwich panel, connecting the two layers of concrete together;

[0049] S6. Curing and demoulding: Curing the precast parts under appropriate conditions to ensure that the concrete reaches the designed strength. After the curing is completed, demoulding is carried out and preparation is made for transportation or installation;

[0050] S7. Quality inspection: Conduct quality inspection on prefabricated sandwich panels, including size, strength, thermal insulation and sound insulation performance, etc.

[0051] S8, transportation and installation: transport qualified prefabricated sandwich panels to the construction site, and hoist and install them according to the construction drawings;

[0052] refer to Figure 1 , Figure 2 and Figure 3 The prefabricated components mentioned in step S2 include a load-bearing plate 1 as a transport structure, a positioning module 2 is detachably connected to the top of the load-bearing plate 1, the positioning module 2 includes a module 1 21 and a module 2 22, the module 2 22 and the module 1 21 are perpendicular to each other and the sides are threadedly connected by a fixing member 24, the cavity surrounded by the module 2 22 and the module 1 21 is used for casting a composite plate 3, the composite plate 3 includes an outer concrete plate 31, a core plate 32, an inner concrete plate 33 and a steel bar 34, the outer concrete plate 31, the core plate 32 and the inner concrete plate 33 are placed in sequence from top to bottom, and a plurality of steel bars 34 for supporting and positioning the core plate 32 are passed through the middle of the inner concrete plate 33.

[0053] refer to Figure 3 , Figure 4 and Figure 5 The module 21 includes a side plate 211 with a trapezoidal groove inside, and both ends of the side plate 211 are provided with a thread groove 215 threadedly connected to the fixing member 24. The side of the side plate 211 is fixedly connected to the side plate 212, and the top of the side plate 212 is evenly provided with a positioning groove 213 for limiting the position of a single steel bar 34. The top of the positioning groove 213 is set as an arc side for facilitating the placement of a single steel bar 34. The middle of the positioning groove 213 is set as a rectangle that provides a clear positioning for the single steel bar 34 so that it can only move in one direction when inserted. The positioning groove 21 The bottom end is set in a semicircular shape for easy cleaning and maintenance. When placing a single steel bar 34, the staff does not need to accurately align the steel bar 34 with the middle of the positioning groove 213. The steel bar 34 can be put down when it is located above the positioning groove 213. The steel bar 34 rotates at the arc-shaped side position above the positioning groove 213 under the action of gravity and the thrust of the staff until it falls into the positioning groove 213. The operation is less difficult, and the positioning groove 213 and the sharp corners of the side of the steel bar 34 will not collide due to inaccurate positioning, causing damage to both and reducing the service life.

[0054] refer to Figure 3 , Figure 4 and Figure 5 The inner wall of the side plate 1 211 is fitted with the side of the positioning block 231 of the positioning member 23. The positioning block 231 is set to a trapezoidal shape, and the two ends of the positioning block 231 are provided with a thread groove 3 232 of the same size as the thread groove 1 215. The thread groove 3 232 is also threadedly connected to the fixing bolt 241 of the fixing member 24. The positioning block 231 is fixedly connected to a limiting plate 233 on one side close to the side plate 212. A plurality of limiting blocks 234 are fixedly connected to the bottom end of the limiting plate 233. The side of the bottom end of the limiting block 234 is set to an arc groove that fits the arc edge of the top of the positioning groove 213. The bottom of the limiting block 234 An annular groove 238 is provided in the middle of the end, an outer ring 235 is fixedly connected inside the annular groove 238, a rubber block 236 is elastically connected to the inner wall of the outer ring 235, and the other end of the rubber block 236 is flexibly connected to the inner ring 237. When the outer surface of the inner ring 237 and the inner wall of the outer ring 235 fit best, the inner wall size of the inner ring 237 is slightly smaller than the size of both sides of the annular groove 238. The fixing member 24 includes a fixing bolt 241 that penetrates the module 22 and the threaded groove 1 215 and is threadedly connected thereto, and the other end of the fixing bolt 241 is fixedly connected to a semicircular block 242. Before the module 1 21 and the positioning member 23 are not fitted together, as shown in FIG. Figure 6As shown, a groove slightly larger than the size of the thread groove 215 is opened in the middle of the support plate 214, and the module 21 is symmetrically arranged on the side of the support plate 214 close to the module 22. The positioning rod 216 includes a compression spring elastically connected to one side of the module 22, and the compression spring is sleeved on the outside of the long rod, and the long rod is slidably connected to the thread groove 217. In the initial state, the outer end of the semicircular block 242, which is smaller than the fixing bolt 241 in size, passes through the groove of the support plate 214, and the fixing bolt 241 does not contact the groove. In the compressed state, the side of the support plate 214 is flush with the trapezoidal groove of the side plate 211, and the side of the support plate 214 is fixedly provided with a positioning rod 216 slidably connected to the inner wall of the side plate 211.

[0055] After placing a single steel bar 34 in the positioning groove 213 and adjusting its position, the steel bar 34 is positioned to prevent displacement during subsequent movement, vibrating and concrete solidification. The staff places the positioning piece 23 on the top of the module 1 21, and the positioning block 231 fits with the inner wall of the side plate 1 211 and slides downward. The positioning block 231 moves downward and squeezes the abutment plate 214 on the inner wall of the side plate 1 211. The abutment plate 214 moves toward the module 2 22. When the positioning block 231 is completely in contact with the inner wall of the side plate 1 211, the abutment plate 214 The compression spring that squeezes the thread groove 1 215 is compressed to the minimum size. At this time, the thread groove 3 232 is horizontally flush with the semicircular block 242, and the positioning block 231 cannot move further downward. The staff then rotates the fixing bolt 241 until the fixing bolt 241 threadedly connected to the thread groove 1 215 and the module 2 22 is threadedly connected to the thread groove 3 232 at the same time, thereby achieving the positioning of the positioning member 23. Due to the limiting effect of the semicircular block 242, there is no need for the staff to adjust the rotation of the fixing bolt 241, and the fixing bolt 241 that rotates linearly can be accurately inserted into the thread groove 3 232.

[0056] The positioning block 231 drives the limiting plate 233 to move synchronously. When the positioning block 231 is restricted by the semicircular block 242 and cannot move further downward, the limiting plate 233 drives the limiting block 234 to move downward to fit with the positioning groove 213. The side of the limiting block 234 fits with the top of the positioning groove 213, and the bottom of the limiting block 234 fits with the middle of the inner wall of the positioning groove 213. The inner ring 237 in the middle of the bottom end of the positioning groove 213 first contacts a single steel bar 34. As the limiting plate 233 moves downward, the inner ring 237 squeezes the rubber block 236. The inner ring 237 restricted by the outer ring 235 and the rubber block 236 can further squeeze the outer surface of the steel bar 34, thereby performing all-round positioning protection on both ends of the steel bar 34, preventing it from rotating while reducing the possibility of deformation in the middle. At the same time, the inner ring 237 and the annular groove 238 form a rectangular maze, which can prevent concrete from entering the inner ring 237 and the outer ring 235.

[0057] refer to Figure 7 , Figure 6 and Figure 3 A limiting groove 221 is provided in the middle of the outer side of the module 2 2 which is threadedly fixed to the upper surface of the bearing plate 1 by a bolt 1 25, and a support member 26 is rotatably connected to the inner side of the limiting groove 221. The support member 26 includes an eccentric rod 261 that can support the bottom end of the steel bar 34, and a fixing rod 262 is fixedly connected to the middle of the eccentric rod 261. One end of the fixing rod 262 is rotatably connected to a movable block 265 that is magnetically attracted to the inner wall of the module 2 22, and the other end of the fixing rod 262 is fixedly connected to a rotating handle 264, and a blocking block 263 is provided on the outer surface of the fixing rod 262 near the rotating handle 264 to damp the rotation. The outer end of the rotating handle 264 passes through the limiting groove 221, which is convenient for the staff to rotate and push and pull it. The size of the blocking block 263 is larger than that of the eccentric rod 261. The size of 261 is larger than the size of the limiting groove 221. An inner groove 224 is provided at the position where the inner wall of the module 22 fits with the limiting groove 221. The inner groove 224 includes a square groove with a positioning ring 223 slidably connected on the inner side. A cylindrical groove with the same size as the inner wall of the limiting plate 233 is provided at the other end of the square groove. The positioning ring 223 is a circular ring composed of two closed semi-rings, and a rectangular groove is provided on one side of the inner wall of the two semi-rings. The side of the blocking block 263 can be engaged with the rectangular groove but cannot pass through the circular ring. The two ends of the outer ring 235 are fixedly connected to the connecting frame 222. The side of the connecting frame 222 close to the module 1 21 is fixedly connected with an inclined wedge block, and the inclined wedge block is fitted with one side of the long rod of the positioning rod 216, and the side of the long rod of the positioning rod 216 that fits with the inclined wedge block is also set as an inclined surface.

[0058] Before installing a single steel bar 34, the staff aligns the support member 26 with the limiting groove 221 and inserts it into the cavity surrounded by the module 1 21 and the module 2 22 until the movable block 265 is magnetically attracted to the side of the module 2 22. At this time, the fixing rod 262 is completely located inside the cavity, a part of the blocking block 263 is engaged with the rectangular groove on the inner wall of the positioning ring 223, and the other part is located on the inner wall of the limiting groove 221. The rotating handle 264 is exposed outside the limiting groove 221. After the blocking block 263 is engaged with the inner side of the rectangular groove of the positioning ring 223, it is no longer Move it, and then rotate the handle 264 according to the design standard. The handle 264 drives the eccentric rod 261 and the fixed rod 262 to rotate synchronously. The fixed rod 262 rotates smoothly under the joint restriction of the limit groove 221, the positioning ring 223, the block 263 and the movable block 265 until the height of the eccentric rod 261 is adjusted to a position flush with the steel bar. Due to different design requirements, the sizes of the steel bar parts 34 used are different. This design can adjust the supporting height of the eccentric rod 261 to the steel bar, thereby increasing its scope of application.

[0059] After the adjustment is completed, the staff will place the steel bar 34 as required, and after positioning it through the positioning piece 23, the steel bar 34 with uniform force at both ends does not need to be supported by the support piece 26. In order to avoid the support piece 26 being placed therein, which will cause the limit plate 233 cast in this position to be unevenly stressed and cracks to appear, the support piece 26 can be completely moved out of the cavity before casting, so as to avoid local stress concentration on the limit plate 233, reduce the risk of cracks, and enhance the strength of the limit plate 233.

[0060] After the positioning member 23 positions the module 1 21, the plate 214 also moves to the position closest to the module 2 22. The long rod of the positioning rod 216 squeezes the oblique wedge block on the side of the connecting frame 222. The connecting frame 222 is forced to move in the direction away from the positioning ring 223. The two half rings of the positioning ring 223 are separated from each other, and the elastic connecting rod in the middle of the half ring is also stretched. The internal size of the limit plate 233 increases, and the blocking block 263 is no longer engaged and limited. At the same time, the inner wall of the module 2 2 that is magnetically attracted to the movable block 265 is provided with a magnetic member. The current direction of the magnetic member is adjusted to change its magnetic direction. The magnetic member no longer magnetically attracts the movable block 265, but repels it. The staff pulls the handle 264 to easily remove the fixed rod 262 from the cavity without interfering with the subsequent pouring. After the support member 26 is pulled out, the elastic connecting rod of the positioning ring 223 restores the positioning ring 223 to a closed state for the next application.

[0061] After the support member 26 is removed, in order to prevent the concrete from clogging the inner groove 224, the staff fills the inner groove 224 with an air bag. After the air bag is inflated, its size is equal to the cylindrical groove of the inner groove 224. The inner wall of the positioning ring 223 in the closed state limits the air bag. The surface of the air bag fits tightly with the surface of the air bag of fixed size, and the concrete cannot enter from the inner groove 224. In the subsequent removal process, the air bag is removed from the side of the composite plate 3 first, which reduces the contact between the concrete and the module 22, making it easier to remove the composite plate 3.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabrication process for sandwich panels, characterized in that: include: S1. Design and Material Preparation: Conduct structural design according to building requirements and design specifications, and prepare required materials, including steel mesh, concrete, sandwich materials, lifting rings, tie bars, etc. S2. Mould preparation: prepare the mould, ensure that the size and shape of the mould meet the design requirements, treat the mould surface to ensure smooth demoulding and component surface quality, place the steel mesh in the mould, install the lifting rings and multiple tie bars on the mesh surface of the steel mesh to form the prefabricated component; S3. First layer concrete pouring: Pour the first layer of concrete into the mold, cover it with steel mesh and hanging rings, and ensure that the concrete is fully compacted to achieve the designed strength and uniformity; S4. Laying of sandwich panels: After the first layer of concrete solidifies, lay the sandwich panels, ensuring that the perforations on the sandwich panels correspond to the tie bars and rings below; S5. Second layer concrete pouring: pour the second layer of concrete on the sandwich panel, and form concrete columns through the holes in the sandwich panel to connect the two layers of concrete together; S6. Curing and demoulding: Curing the precast components under appropriate conditions to ensure that the concrete reaches the designed strength. After curing, demoulding and preparation for transportation or installation are completed. S7. Quality inspection: Conduct quality inspection on prefabricated sandwich panels, including size, strength, thermal insulation and sound insulation performance, etc. S8, transportation and installation: transport qualified prefabricated sandwich panels to the construction site, and hoist and install them according to the construction drawings; The prefabricated components in S2 include a carrier plate (1) for transmission, a positioning module (2) that meets the design requirements is detachably connected above the carrier plate (1), a composite plate (3) is placed in the cavity of the positioning module (2), and the composite plate (3) includes an outer concrete plate (31), a core plate (32), an inner concrete plate (33) and a reinforcement member (34), the outer concrete plate (31) is located at the top, the bottom end of the outer concrete plate (31) is fixedly connected to the core plate (32), the bottom end of the core plate (32) is fixedly connected to the inner concrete plate (33), and the inner concrete plate (33) is provided with a reinforcement member (34); The positioning module (2) includes a module 1 (21) for limiting the position of the steel bar (34), and module 2 (22) is provided at both ends of the module 1 (21). The module 2 (22) is connected to the side of the module 1 (21) through a fixing member (24) threadedly connected to the side of the module 1 (21). A positioning member (23) is provided above the module 1 (21) and is fitted therewith. The positioning member (23) and the module 1 (21) work together to position the two ends of the steel bar (34) in all directions. The edge of the module 2 (22) is fixedly connected to the top of the bearing plate (1) through bolts 1 (25) evenly arranged. Wherein, a support member (26) for adjusting and supporting the middle part of the reinforcement member (34) is provided in the middle part of the second module (22).

2. The prefabrication process of a sandwich panel according to claim 1, characterized in that: The module 1 (21) includes a side plate 1 (211) fixedly connected to the upper surface of the supporting plate (1), and both ends of the side plate 1 (211) are provided with a thread groove 1 (215) threadedly connected to the fixing member (24), and the inner wall of the side plate 1 (211) is symmetrically provided with a support plate (214) movably connected thereto, and a positioning rod (216) is provided on the side of the support plate (214) close to the module 2 (22), and one end of the positioning rod (216) passes through the thread groove 2 (217) provided on the side of the side plate 1 (211), and the side of the side plate 1 (211) is fixedly connected to the side plate 2 (212), and the upper surface of the side plate 2 (212) is evenly provided with a plurality of positioning grooves (213).

3. The prefabrication process of a sandwich composite panel according to claim 2, characterized in that: The fixing member (24) comprises a fixing bolt (241) threadedly connected to the thread groove (215); one end of the fixing bolt (241) passes through the thread groove (215) and the abutment plate (214) and is fixedly connected to a semicircular block (242).

4. The prefabrication process of a sandwich composite panel according to claim 2, characterized in that: The top of the positioning groove (213) is configured as an arc-shaped side for facilitating the placement of a single steel bar (34); the middle of the positioning groove (213) is configured as a rectangle that provides clear positioning for the single steel bar (34) so ​​that it can only move in one direction when inserted; and the bottom of the positioning groove (213) is configured as a semicircle that is convenient for cleaning and maintenance.

5. The prefabrication process of a sandwich composite panel according to claim 2, characterized in that: The positioning member (23) includes a positioning block (231) fitted with the inner wall of the side plate (211), the positioning block (231) is fixedly connected to the limiting plate (233) on the side, and the two ends of the positioning block (231) are provided with thread grooves (232) threadedly connected to the fixing bolts (241), and a plurality of limiting blocks (234) are evenly arranged at the bottom end of the limiting plate (233), and the inner side of the bottom end of the limiting block (234) is provided with an annular groove (238), and the inner side of the annular groove (238) is fixedly connected to the outer ring (235), and the outer ring (235) is connected to the inner ring (237) through a rubber block (236) flexibly connected to the inner wall.

6. The prefabrication process of a sandwich panel according to claim 1, characterized in that: The support member (26) includes an eccentric rod (261) capable of supporting the bottom end of the steel bar member (34), a fixed rod (262) is fixedly connected to the middle part of the eccentric rod (261), one end of the fixed rod (262) is rotatably connected to a movable block (265) that is magnetically attracted to the inner wall of the second module (22), the other end of the fixed rod (262) is fixedly connected to a rotating handle (264), and a blocking block (263) is provided on the outer surface of a portion of the circumference of the fixed rod (262) close to the rotating handle (264) to damp the rotation.

7. The prefabrication process of a sandwich panel according to claim 1, characterized in that: A limiting groove (221) is provided at the bottom end of the second module (22) on a side away from the steel bar (34); an inner groove (224) is provided on the side of the limiting groove (221); a positioning ring (223) is slidably connected to the inner wall of the inner groove (224); a connecting frame (222) is fixedly connected to the middle of the outer side of the positioning ring (223); and the connecting frame (222) is in contact with the positioning rod (216) on a side away from the limiting groove (221).

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