Assembly type energy storage sandwich wall with replaceable phase-change materials and construction method of assembly type energy storage sandwich wall

Abstract

The invention belongs to the field of sandwich walls, and particularly relates to an assembly type energy storage sandwich wall with a replaceable phase change material and a construction method thereof.The sandwich wall comprises a sandwich wall body, the sandwich wall body is of a hollow splicing type structure, and an external wall panel is arranged on one side of the surface of the sandwich wall body; an inner wall panel is arranged on the side, away from the outer wall panel, of the sandwich wall body, and the outer wall panel and the inner wall panel jointly form an existing frame of the sandwich wall body. The FRP pipes are used for replacing load-bearing steel bars of the inner side wall plate, the mechanical property is guaranteed, meanwhile, the hollow FRP pipes can serve as storage containers of phase-change materials, the phase-change materials in the pipes can be replaced according to the temperature requirements in different seasons, finally, the interior and the exterior of the wall body are integrated, an external material layer provides higher bending strength and impact strength, and the construction cost is reduced. The middle material layer provides efficient heat preservation capacity, the inner material layer provides higher heat storage capacity, the use strength of the wall is improved, and meanwhile the packaging effect of the wall is improved.

Description

Technical Field

[0001] The present invention belongs to the field of sandwich walls, and in particular relates to an assembled energy storage sandwich wall with replaceable phase change material and a construction method thereof. Background Art

[0002] As a new type of building energy-saving wall panel, sandwich wall panels have been widely used in recent years. They have the characteristics of low heat transfer coefficient and light weight. The concrete layers on both sides have the functions of thermal insulation and compression and bending resistance. Compared with traditional building walls, they further improve material utilization efficiency and energy-saving efficiency.

[0003] As we all know, lightweight materials have good thermal insulation effects, but poor heat storage performance. In order to improve their heat storage capacity, they are combined with phase change materials. The two can complement each other in terms of thermal performance. However, after the phase change material is added, it is found that the packaging and mechanical properties of the wall will decrease. This situation has been confirmed after many experiments. How to ensure that the packaging and load-bearing of the wall will not be affected after the phase change material is added is a problem that needs to be solved urgently.

[0004] Therefore, the present invention proposes an assembled energy storage sandwich wall panel with replaceable phase change material. Summary of the invention

[0005] The purpose of the present invention is to provide an assembled energy storage sandwich wall with replaceable phase change material and a construction method thereof, which can provide greater bending and impact resistance. The middle material layer of the wall can provide more efficient thermal insulation capacity, and the internal material layer can provide stronger heat storage capacity.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An assembled energy storage sandwich wall with replaceable phase change material and a construction method thereof, comprising a sandwich wall body, the sandwich wall body being a hollow splicing structure, an external wall panel being arranged on one side of the surface of the sandwich wall body, an internal wall panel being arranged on the side of the sandwich wall body away from the external wall panel, the external wall panel and the internal wall panel together forming an existing frame of the sandwich wall body, a steel mesh being arranged inside the sandwich wall body, the steel mesh being specifically arranged in parallel and at right angles and staggered inside the sandwich wall body, the steel mesh being specifically installed inside the external wall panel and the internal wall panel, the external wall panel and the internal wall panel also being arranged as an overall load-bearing bracket of the sandwich wall body, the corresponding surfaces of the external wall panel and the internal wall panel being both provided with in-board reinforcing ribs, a polyethylene insulation board being arranged inside the sandwich wall body, the polyethylene insulation board being installed on the corresponding surfaces of the internal wall panel and the external wall panel, the specific installation position of the polyethylene insulation board being located in the spacing space between the two in-board reinforcing ribs, and the cutting area of ​​the polyethylene insulation board being equal to the spacing area of ​​the in-board reinforcing ribs;

[0008] A zigzag FRP tube, wherein the zigzag line of the zigzag FRP tube runs through the interior of the internal wall panel and the external wall panel, the interior of the external wall panel and the internal wall panel are pre-buried with longitudinal FRP tubes, the surface of the longitudinal FRP tube is vertically and alternately provided with transverse FRP tubes, and the transverse FRP tubes are also pre-buried in the interior of the external wall panel and the internal wall panel, the upper and lower ends of the longitudinal FRP tube are provided with longitudinal FRP tube openings, and the longitudinal FRP tube openings are protrusions on the surfaces of the external wall panel and the internal wall panel, and the upper and lower ends of the zigzag FRP tube are also provided with zigzag FRP tube openings, and the zigzag FRP tube openings are also exposed on the surfaces of the external wall panel and the internal wall panel.

[0009] Furthermore, the interior of the zigzag FRP tube, the longitudinal FRP tube and the transverse FRP tube are all filled with phase change material, and the phase change material is specifically a phase change microcapsule emulsion. The filling of the phase change microcapsule emulsion is used to ensure the fluidity inside the zigzag FRP tube, the longitudinal FRP tube and the transverse FRP tube.

[0010] Furthermore, the number of the zigzag FRP tubes corresponds to the shear strength of the external wall panels and the internal wall panels, referring to the formula where σ is the normal stress acting on the shear plane, is the internal friction angle of the soil, C is the cohesion of the soil, and the shear strength of the soil is calculated based on this. Again, refer to the formula where σ , is the normal effective stress on the shear failure surface, is the effective internal friction angle, C , is the effective cohesion, u is the pore water pressure, and the number of zigzag FRP pipes to be set is matched and calculated based on this.

[0011] Furthermore, the maximum diameter of the longitudinal FRP tube and the transverse FRP tube is 20 mm, the maximum wall thickness of the longitudinal FRP tube and the transverse FRP tube is 1 mm, and the arrangement quantity of the longitudinal FRP tube and the transverse FRP tube corresponds to the energy storage demand of the inner wall panel and the outer wall panel.

[0012] Furthermore, the number of the steel meshes provided matches the bending strength requirement of the external wall panel, the maximum diameter of the steel mesh is 8 mm, and the steel mesh is a threaded steel structure.

[0013] Furthermore, the reinforcing ribs inside the plate, the inner wall panels and the outer wall panels are all made of the same material, and the comparative lengths of the inner wall panels and the outer wall panels are both shorter than the installation length of the steel mesh.

[0014] Furthermore, holes are provided on the surfaces of the external wall panels and the internal wall panels, and the holes are used for fixing bolts installed on the surfaces of the external wall panels and the internal wall panels. The diameter of the holes matches the bolts installed in the matching manner. A floor is provided on the top of the external wall panels and the internal wall panels, and the external wall panels and the internal wall panels are fixedly connected to the floor through the bolts installed in the holes. The external wall panels and the internal wall panels have embedded grouting sleeves.

[0015] Furthermore, the installation positions of the inner plate reinforcing ribs and the zigzag FRP tubes in the external wall panels and the internal wall panels overlap, the zigzag FRP tubes are pre-buried in the external wall panels and the internal wall panels, and the inner plate reinforcing ribs are used to protect the installed zigzag FRP tubes.

[0016] A construction method of an assembled energy storage sandwich wall with replaceable phase change material, comprising:

[0017] First, the steel mesh and the zigzag FRP pipe are pre-laid and tied, and then the formwork is erected. During the erection of the formwork, the inner surface of the formwork is cleaned, including but not limited to applying a release agent. Then, when the formwork is cleaned, the pipe opening of the zigzag FRP pipe is blocked with foam to prevent mud from entering, and then the external wall panel is poured. After the pouring is completed, the polyethylene insulation board is laid at the predetermined position. Referring to the above formula, the spacing of the polyethylene insulation board is adjusted according to the area of ​​the external wall panel;

[0018] Then, after the polyethylene insulation board is adjusted, the concrete of the external wall panel is waited for to initially set, and then the longitudinal FRP pipe and the transverse FRP pipe are laid, and the pipe openings are blocked with foam to prevent mud from entering. Referring to the foam blocking step in S1, the foam used for blocking can be replaced with any material with blocking function, and then the height and level of the longitudinal FRP pipe and the transverse FRP pipe are adjusted, and then the internal wall panel is poured, and the overall pouring is completed and maintained, and then the sandwich wall is hoisted to the installation position, connected with a grouting sleeve, or connected with bolts, and the level of the sandwich wall is adjusted before fixing;

[0019] Finally, after completing the above, take out the foam used to seal the longitudinal FRP tube and the transverse FRP tube, use an air pump to inflate the longitudinal FRP tube and the transverse FRP tube for inspection, and clean the internal dust. After the inspection is completed and it is confirmed that there is no foreign matter, connect the perfusion equipment to the lower pipe openings of the longitudinal FRP tube and the transverse FRP tube, inject the phase change microcapsule emulsion, wait for the liquid to fill it, observe whether a small amount overflows from the upper pipe opening, then stop the perfusion, and seal all the gates, thus completing the construction of the sandwich wall.

[0020] The technical effects achieved by the present invention are:

[0021] The present invention uses FRP tubes to replace the stress-bearing steel bars of the inner wall panels. While ensuring the mechanical properties, the hollow FRP tubes can also serve as storage containers for phase change materials. The phase change materials in the tubes can be replaced according to the temperature requirements of different seasons, ultimately making the wall body integrated inside and out, with the outer material layer providing greater bending and impact resistance, the middle material layer providing efficient thermal insulation capacity, and the inner material layer providing stronger heat storage capacity, thereby improving the use strength of the wall body and also improving the packaging effect of the wall body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the energy storage sandwich wall as a whole and its cross-sectional view according to the present invention;

[0023] Figure 2 It is a schematic diagram of the pre-embedded laying structure of the steel mesh inside the energy storage sandwich wall of the present invention;

[0024] Figure 3 is a schematic diagram of a zigzag FRP tube of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the polyethylene thermal insulation board of the present invention;

[0026] Figure 5 is a schematic diagram of longitudinal and transverse FRP tubes in the inner wall panel of the present invention;

[0027] Figure 6 is a schematic diagram of a partial step in step S1 in an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of a partial step in step S2 in an embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of a partial step in step S3 in an embodiment of the present invention;

[0030] Fig. 9 is a schematic diagram of a partial step in step S4 in an embodiment of the present invention;

[0031] Fig.10 is a schematic diagram of bolt connection in step S5 in an embodiment of the present invention;

[0032] Fig.11 It is a schematic diagram of the grouting sleeve in step S5 in an embodiment of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Sandwich wall; 11. Internal wall panel; 12. External wall panel; 13. Steel mesh; 21. Inner reinforcing ribs; 22. Polyethylene insulation board; 31. Zigzag FRP pipe; 32. Longitudinal FRP pipe; 33. Transverse FRP pipe; 321. Longitudinal FRP pipe outlet; 311. Zigzag FRP pipe outlet. DETAILED DESCRIPTION

[0035] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0036] Embodiment 1:

[0037] like Figure 1-11 As shown, an assembled energy storage sandwich wall with replaceable phase change material includes a sandwich wall body 1, the sandwich wall body 1 is a hollow splicing structure, an external wall panel 12 is arranged on one side of the surface of the sandwich wall body 1, and an internal wall panel 11 is arranged on the side of the sandwich wall body 1 away from the external wall panel 12. The external wall panel 12 and the internal wall panel 11 together constitute the existence frame of the sandwich wall body 1, and a steel mesh 13 is arranged inside the sandwich wall body 1. The steel mesh 13 is specifically arranged in parallel and at right angles inside the sandwich wall body 1. The steel mesh 13 is specifically installed inside the external wall panel 12 and the internal wall panel 11. The external wall panel 12 and the internal wall panel 11 also serve as the overall load-bearing support of the sandwich wall body 1. The corresponding surfaces of the external wall panels 12 and the internal wall panels 11 are provided with inner-board reinforcing ribs 21, and the interior of the sandwich wall 1 is provided with polyethylene insulation boards 22, which are installed on the corresponding surfaces of the internal wall panels 11 and the external wall panels 12. The specific installation position of the polyethylene insulation boards 22 is located in the spacing space between the two inner-board reinforcing ribs 21, and the cutting area of ​​the polyethylene insulation boards 22 is equal to the spacing area of ​​the inner-board reinforcing ribs 21. By such an arrangement, the convenience of the construction of the sandwich wall 1 in the above structure is preferentially ensured. We can find that, in the case of the sequential casting design of the internal wall panels 11 and the external wall panels 12, the convenience of wall casting is first ensured, and with reference to Figure 2 In the design, the steel mesh 13 is a group of two and is in a mesh shape and overlapped with each other, which effectively strengthens the firmness and toughness of the wall. Through such a setting, we can see that during the pouring process of the sandwich wall 1, the steel mesh 13 serves as the initial load-bearing of the sandwich wall 1. During the construction process, it can bear the lateral tensile shear force and vertical shear force of the sandwich wall 1, thereby preliminarily ensuring the load-bearing and firmness of the sandwich wall 1;

[0038] A zigzag FRP tube 31, the zigzag line of which runs through the interior of the inner wall panel 11 and the outer wall panel 12, the interior of the outer wall panel 12 and the inner wall panel 11 are pre-buried with longitudinal FRP tubes 32, the surface of the longitudinal FRP tube 32 is vertically and alternately provided with transverse FRP tubes 33, the transverse FRP tubes 33 are also pre-buried in the exterior wall panel 12 and the interior wall panel 11, the upper and lower ends of the longitudinal FRP tube 32 are provided with longitudinal FRP tube openings 321, the longitudinal FRP tube openings 321 are protrusions on the surface of the exterior wall panel 12 and the interior wall panel 11, the upper and lower ends of the zigzag FRP tube 31 are also provided with zigzag FRP tube openings 311, the zigzag FRP tube openings 311 are also exposed on the surface of the exterior wall panel 12 and the interior wall panel 11.

[0039] In the present embodiment, it is clear that after the steel mesh 13 serves as the initial load-bearing member of the sandwich wall 1, the zigzag FRP tube 31 can now serve as the subsequent load-bearing member of the sandwich wall 1. Considering the firmness of the cast cement wallboard, in actual use, even if there is the steel mesh 13 as the initial load-bearing member, after a long period of use, the sandwich wall 1 may still crack due to its own material properties, under the action of gravity and shear force, and other problems that affect its own use. Therefore, the zigzag FRP tube 31 can be directly used as a subsequent reinforcement member of the steel mesh 13 to fill the gap between the steel mesh 13 and the external wall panel 12 and the internal wall panel 11. The zigzag design further expands the zigzag FRP tube 31 in the external wall panel 12 and the internal wall panel 11. The contact area ensures the sturdiness of the sandwich wall 1, and in order to further improve the sturdiness of the external wall panel 12 and the internal wall panel 11, we add longitudinal FRP tubes 32 and transverse FRP tubes 33 in the same mesh format, which are installed inside the external wall panel 12 and the internal wall panel 11, so as to improve the overall shear bearing capacity of the sandwich wall 1, and cooperate with the embedded in-plate reinforcing ribs 21 for use, and divide the steel mesh 13 and the external wall panel 12 as a whole from the side, and divide the external wall panel 12 and the internal wall panel 11 into various blocks with the presence of the in-plate reinforcing ribs 21, thereby ensuring that the shear stress of the device is increased, and in terms of load-bearing, it is strengthened without damaging the overall toughness, thereby ensuring the use effect of the device.

[0040] like Figure 1-11 As shown, the interior of the zigzag FRP tube 31, the longitudinal FRP tube 32 and the transverse FRP tube 33 are all filled with phase change material, which is specifically a phase change microcapsule emulsion. The filling of the phase change microcapsule emulsion is used to ensure the fluidity inside the zigzag FRP tube 31, the longitudinal FRP tube 32 and the transverse FRP tube 33.

[0041] In this embodiment, the phase-changeable microcapsule emulsion absorbs or releases heat when the temperature changes, thereby achieving temperature regulation and energy storage. It is selected for adaptation because of its outstanding temperature regulation performance and the fact that its material will not have the problem of condensation. That is to say, although the zigzag FRP tube 31, the longitudinal FRP tube 32, and the transverse FRP tube 33 are all supporting components inside the external wall panel 12 and the internal wall panel 11, they will not form a whole with the external wall panel 12 and the internal wall panel 11 when used independently. During use, we can find that among the three structures mentioned above, the shear stress bearing capacity of the internal fluidity is much greater than the shear stress bearing capacity of the solid or hollow internal structure. The fluid internal structure gives the external wall panel 12 and the internal wall panel 11 internal tensile stress, increases the toughness of the internal wall panel 11 and the external wall panel 12 after construction, and thereby enhances the sturdiness of the device.

[0042] like Figure 1-11 As shown, the number of the zigzag FRP tubes 31 corresponds to the shear strength of the external wall panel 12 and the internal wall panel 11, referring to the formula where σ is the normal stress acting on the shear plane, is the internal friction angle of the soil, C is the cohesion of the soil, and the shear strength of the soil is calculated based on this. Again, refer to the formula where σ , is the normal effective stress on the shear failure surface, is the effective internal friction angle, C , is the effective cohesion, u is the pore water pressure, and the number of the zigzag FRP pipes 31 to be set is matched and calculated.

[0043] In this embodiment, by such an arrangement, the device can effectively divide the internal wall panel 11 and the external wall panel 12 into blocks during installation, while reducing the number of installed reinforcing ribs 21 in the panel. At the same cost, it can more effectively support the sandwich wall 1, reduce material consumption, and will not affect the use support of the device.

[0044] like Figure 1-11 As shown, the maximum diameter of the longitudinal FRP tube 32 and the transverse FRP tube 33 is 20 mm, the maximum wall thickness of the longitudinal FRP tube 32 and the transverse FRP tube 33 is 1 mm, and the arrangement quantity of the longitudinal FRP tube 32 and the transverse FRP tube 33 corresponds to the energy storage requirements of the inner wall panel 11 and the outer wall panel 12.

[0045] In this embodiment, by such an arrangement, the device can maximize its efficiency in providing strength support for the external wall panel 12 and the internal wall panel 11 during use. At the same time, according to experimental calculations, when the longitudinal FRP tube 32 and the transverse FRP tube 33 are 20 mm, the support efficiency and temperature control efficiency data of the longitudinal FRP tube 32 and the transverse FRP tube 33 for the external wall panel 12 and the steel mesh 13 are optimal. If this range is exceeded, the overall load-bearing capacity of the external wall panel 12 and the steel mesh 13 will be reduced, and if this range is lower than this range, the temperature control effect of the external wall panel 12 and the steel mesh 13 will be affected.

[0046] like Figure 1-11 As shown, the number of steel meshes 13 matches the bending strength requirement of the external wall panel 12, the maximum diameter of the steel mesh 13 is 8 mm, and the steel mesh 13 is a threaded steel structure.

[0047] In this embodiment, the supporting effect of the steel mesh 13 is guaranteed by such a setting. At the same time, the rebar material is selected because it has high hardness, good durability, excellent shock resistance and firmness, good process performance, high tensile strength, good ductility and welding performance. Compared with similar materials, it is more adaptable to shear and stretching problems in the wall, and the diameter of 8mm can ensure the normal support effect of the wall.

[0048] like Figure 1-11 As shown, the reinforcing ribs 21 inside the plate, the inner wall panel 11 and the outer wall panel 12 are all made of the same material, and the comparative lengths of the inner wall panel 11 and the outer wall panel 12 are both smaller than the installation length of the steel mesh 13 .

[0049] In this embodiment, such a configuration ensures that the steel mesh 13 can extend to the rest of the wall. With this limitation, we have ensured that the wall must have a specified area and be spliced ​​in blocks. During the splicing process, the steel mesh 13 that extends beyond the exterior wall panels 12 and the interior wall panels 11 can be effectively embedded into the rest of the exterior wall panels 12 and the steel mesh 13, thereby ensuring that the two sandwich wall bodies 1 can be connected, thereby ensuring the use effect of the device.

[0050] like Figure 1-11 As shown, holes are provided on the surfaces of the external wall panels 12 and the internal wall panels 11, and the holes are used for fixing bolts on the surfaces of the external wall panels 12 and the internal wall panels 11. The diameter of the holes matches the bolts to be installed. A floor is provided on the top of the external wall panels 12 and the internal wall panels 11. The external wall panels 12 and the internal wall panels 11 are fixedly connected to the floor through the bolts installed in the holes, and the external wall panels 12 and the internal wall panels 11 are internally embedded with grouting sleeves.

[0051] In this embodiment, through such an arrangement, it can be seen that the external wall panels 12 and the internal wall panels 11 can be more conveniently installed with any supporting frame including floor slabs due to the opening of the holes, and the pre-embedded grouting sleeves ensure the convenience of the construction of the device to a certain extent.

[0052] like Figure 1-11 As shown, the installation positions of the inner reinforcing ribs 21 and the zigzag FRP tubes 31 in the external wall panels 12 and the internal wall panels 11 overlap, the zigzag FRP tubes 31 are pre-buried in the external wall panels 12 and the internal wall panels 11, and the inner reinforcing ribs 21 are used to protect the installation of the zigzag FRP tubes 31.

[0053] In this embodiment, by such an arrangement, the inner plate reinforcing ribs 21 can not only separate the sandwich wall body 1 into blocks during use, but also serve as stabilizers for the zigzag FRP tubes 31 after the outer wall panels 12 and the inner wall panels 11 solidify, and reinforce the zigzag FRP tubes 31 again, thereby ensuring the stable installation of the zigzag FRP tubes 31. It should be noted that if the zigzag FRP tubes 31 in the inner wall panels 11 and the outer wall panels 12 are dislocated, it must occur after the inner plate reinforcing ribs 21 are no longer stable. However, when the two inner plate reinforcing ribs 21 are clamped between the outer wall panels 12 and the inner wall panels 11, at this time, all the inner plate reinforcing ribs 21 can be used as an integrally connected stable structure inside the sandwich wall body 1. Therefore, before the sandwich wall body 1 completely collapses, the installation of the zigzag FRP tubes 31 will not have dislocation problems, thereby ensuring the use effect of the device.

[0054] Embodiment 2:

[0055] A construction method of an assembled energy storage sandwich wall with replaceable phase change material, comprising:

[0056] First, the steel mesh 13 and the zigzag FRP tube 31 are pre-laid and tied, and then the formwork is erected. During the erection of the formwork, the inner surface of the formwork is cleaned, including but not limited to applying a release agent. Then, when the formwork is cleaned, the pipe opening of the zigzag FRP tube 31 is blocked with foam to prevent mud from entering, and then the external wall panel 12 is poured. After the pouring is completed, the polyethylene insulation board 22 is laid at the predetermined position. Referring to the above formula, the spacing of the polyethylene insulation board 22 is adjusted according to the area of ​​the external wall panel 12;

[0057] Then, after the polyethylene insulation board 22 is adjusted, the concrete of the external wall panel 12 is waited for to initially set, and then the longitudinal FRP pipe 32 and the transverse FRP pipe 33 are laid, and the pipe openings are blocked with foam to prevent mud from entering. Referring to the foam blocking step in S1, the foam used for blocking can be replaced with any material with blocking function, and then the height and level of the longitudinal FRP pipe 32 and the transverse FRP pipe 33 are adjusted, and then the internal wall panel 11 is poured, and the overall pouring is completed and maintained, and then the sandwich wall body 1 is hoisted to the installation position, connected with a grouting sleeve, or connected with bolts, and the level of the sandwich wall body 1 is adjusted before fixing;

[0058] Finally, after completing the above, take out the foam used to seal the longitudinal FRP tube 32 and the transverse FRP tube 33, use an air pump to inflate the longitudinal FRP tube 32 and the transverse FRP tube 33 for inspection, and clean the dust inside. After the inspection is completed and it is confirmed that there is no foreign matter, connect the filling equipment to the lower pipe openings of the longitudinal FRP tube 32 and the transverse FRP tube 33, inject the phase change microcapsule emulsion, wait for the liquid to fill it, observe whether a small amount of overflow from the upper pipe opening can stop the filling, and seal all the gates, so as to complete the construction of the sandwich wall 1.

[0059] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An assembled energy storage sandwich wall with replaceable phase change material, characterized in that: include: A sandwich wall body (1), wherein the sandwich wall body (1) is of a hollow splicing structure, an external wall panel (12) is arranged on one side of the surface of the sandwich wall body (1), an internal wall panel (11) is arranged on the side of the sandwich wall body (1) away from the external wall panel (12), the external wall panel (12) and the internal wall panel (11) together constitute the existence frame of the sandwich wall body (1), a steel mesh (13) is arranged inside the sandwich wall body (1), the steel mesh (13) is arranged in parallel and at right angles inside the sandwich wall body (1), and the steel mesh (13) is installed between the external wall panel (12) and the internal wall panel (11) 11), the external wall panel (12) and the internal wall panel (11) are also arranged as the overall load-bearing bracket of the sandwich wall body (1), the corresponding surfaces of the external wall panel (12) and the internal wall panel (11) are both provided with in-board reinforcing ribs (21), the sandwich wall body (1) is provided with a polyethylene insulation board (22), the polyethylene insulation board (22) is installed on the corresponding surfaces of the internal wall panel (11) and the external wall panel (12), the polyethylene insulation board (22) is located between the two in-board reinforcing ribs (21), and the cutting area of ​​the polyethylene insulation board (22) is equal to the spacing area of ​​the in-board reinforcing ribs (21); A zigzag FRP tube (31), wherein the zigzag line of the zigzag FRP tube (31) passes through the interior of an inner wall panel (11) and an outer wall panel (12), wherein longitudinal FRP tubes (32) are pre-buried in the interior of the outer wall panel (12) and the inner wall panel (11), wherein transverse FRP tubes (33) are vertically and alternately arranged on the surface of the longitudinal FRP tube (32), wherein the transverse FRP tubes (33) are also pre-buried in the interior of the outer wall panel (12) and the inner wall panel (11), and longitudinal FRP tube openings (321) are provided at the upper and lower ends of the longitudinal FRP tube (32).

2. The assembled energy storage sandwich wall with replaceable phase change material according to claim 1, characterized in that: The longitudinal FRP pipe opening (321) is a protrusion on the surface of the external wall panel (12) and the internal wall panel (11), and the upper and lower ends of the zigzag FRP pipe (31) are also provided with zigzag FRP pipe openings (311), and the zigzag FRP pipe openings (311) are also exposed on the surface of the external wall panel (12) and the internal wall panel (11).

3. The assembled energy storage sandwich wall with replaceable phase change material according to claim 2, characterized in that: The inside of the zigzag FRP tube (31), the longitudinal FRP tube (32) and the transverse FRP tube (33) are all filled with a phase change material, wherein the phase change material is a phase change microcapsule emulsion, and the filling of the phase change microcapsule emulsion is used to ensure the fluidity inside the zigzag FRP tube (31), the longitudinal FRP tube (32) and the transverse FRP tube (33).

4. The assembled energy storage sandwich wall with replaceable phase change material according to claim 3 is characterized by: The inner reinforcing ribs (21), the inner wall panels (11) and the outer wall panels (12) are all made of the same material, and the comparative lengths of the inner wall panels (11) and the outer wall panels (12) are both shorter than the installation length of the steel mesh (13).

5. The assembled energy storage sandwich wall with replaceable phase change material according to claim 4, characterized in that: The surfaces of the external wall panel (12) and the internal wall panel (11) are provided with holes, and the holes are used for fixing bolts installed on the surfaces of the external wall panel (12) and the internal wall panel (11), and the opening diameter of the holes matches the bolts to be installed.

6. The assembled energy storage sandwich wall with replaceable phase change material according to claim 5, characterized in that: A floor is arranged on the top of the external wall panel (12) and the internal wall panel (11); the external wall panel (12) and the internal wall panel (11) are fixedly connected to the floor via bolts installed in holes; and grouting sleeves are embedded inside the external wall panel (12) and the internal wall panel (11).

7. The assembled energy storage sandwich wall with replaceable phase change material according to claim 6, characterized in that: The installation positions of the in-plate reinforcing ribs (21) and the zigzag FRP tubes (31) in the external wall panels (12) and the internal wall panels (11) overlap, the zigzag FRP tubes (31) are pre-buried in the external wall panels (12) and the internal wall panels (11), and the in-plate reinforcing ribs (21) are used to protect the installation of the zigzag FRP tubes (31).

8. A construction method for an assembled energy storage sandwich wall with replaceable phase change material, used for constructing the sandwich wall according to any one of claims 1 to 5, characterized in that: include: S1: pre-laying and tying the steel mesh (13) and the zigzag FRP pipe (31), and then starting to erect the formwork. During the erection of the formwork, the inner surface of the formwork is cleaned, including but not limited to applying a release agent. Then, after the formwork is cleaned, the pipe opening of the zigzag FRP pipe (31) is blocked with foam; S2: Casting the external wall panel (12), laying the polyethylene insulation board (22) at the predetermined position after the casting is completed, and referring to the above formula, start adjusting the spacing of the polyethylene insulation board (22) according to the area of ​​the external wall panel (12); S3: After the polyethylene insulation board (22) is adjusted, the concrete of the external wall panel (12) is waited for to initially set, and then the longitudinal FRP pipe (32) and the transverse FRP pipe (33) are laid, and the pipe openings are blocked with foam, referring to the foam blocking step in S1, wherein the foam used for blocking can be replaced with a material having a blocking function; S4: Afterwards, the height and level of the longitudinal FRP tube (32) and the transverse FRP tube (33) are adjusted, and then the inner wall panel (11) is cast, and the overall casting is completed and maintained; S5: hoisting the sandwich wall body (1) to the installation position, connecting it with a grouting sleeve or bolts, and adjusting the horizontality of the sandwich wall body (1) before fixing; S6: After the above contents are completed, the foam used to seal the longitudinal FRP tube (32) and the transverse FRP tube (33) is taken out, and air is introduced into the longitudinal FRP tube (32) and the transverse FRP tube (33) using an air pump to inspect and clean the dust inside. S7: After checking to make sure there are no foreign objects, connect the pouring equipment to the lower pipe openings of the longitudinal FRP pipe (32) and the transverse FRP pipe (33), inject the phase change microcapsule emulsion, wait until the liquid fills the pipes, and observe whether a small amount of overflow from the upper pipe opening can stop pouring, and seal all the ports, thus completing the construction of the sandwich wall (1).

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