33results about How to "Reduce thermal bridges" patented technology

Supported bundling insulated composite wall, relates to outer insulated composite wall for buildings. The purpose of this invention is to solve the problem that existing blocks have their heat bridge, great impact the energy-saving of construction and can not reach the low heat transfer coefficient of the wall. The inner terminal of concrete cantilever strutting piece (2), the level connecting link (7) and plastic bulging nails (9) of the invention are fixed within the concrete structure of the main building (10) or basal wall (1), the outer terminal of concrete cantilever strutting piece (2) and the level connecting link (7) are connecting fixed with vertical steel bars (5) in the outer protective layer, an insulating layer (3) is fixed outer flank of basal wall (1) by plastic bulging nails (9)outer flank of insulating layer (3) is the vertical steel bars (5), out or inside of the bars is set with metal network (4), the outer ends of metal network (4), the vertical bars (5) and the plastic bulging nails (9) are fixed together, the protective layer (8) built by cement mortar or pisolith concrete is found outside the insulation layer (3).the present invention is safe, durable ,with good heat-insulating and fire resisting properties.

The invention relates to a bound thermal-insulation composite wall with supports, which provides an external thermal-insulation composite wall of building, to overcome the defects of present technique. Wherein, the concrete hanging beam support (2), the internal outwards-drawing connector (7), and the inner end of plastic expansion nail (9) are fixed inside the main construct concrete (10) or basic wall (1); the concrete hanging beam support (2) and the outer end of inner outwards-drawing connector (7) are inside the outer protective layer (8) to connect the vertical steel bar (5); the outer side of basic wall (1) has a thermal-insulated layer (3) fixed via plastic expansion nail (9); the outer side of thermal-insulated layer (3) has a vertical steel bar (5); the outer or inner side of vertical steel bar (5) has a metallic network (4) which is connected to the vertical steel bar (5); the outer side of thermal-insulated layer (3) has a outer protective layer (8) made from cement sand pulp or pea stone concrete. The invention has the advantages that safety, long service life, better thermal insulation and flameproof.

The invention discloses fiber aerogel foam concrete, a preparation method and application thereof. The fiber aerogel foam concrete disclosed by the invention comprises the following raw materials: binding materials, aerogel powder, cellosilk, viscous water, a foaming agent and water, wherein the mass ratio of the binding materials to aerogel powder to cellosilk to viscous water is 1: (0.01-0.3):(0.001-0.01):(0.35-1); the particle size of the aerogel powder is smaller than 250 microns, the porosity is 80-99%, and the pore diameter is 10-50nm; the cellosilk is uniformly distributed, and the diameter is 10-50 microns. The fiber aerogel foam concrete disclosed by the invention has the advantages of ultralow density, ultralow heat conductivity and excellent thermal insulation, can be applied tothe fields of thermal insulation of building walls, road filling, barrier sound insulation, and has wide application prospect.

The invention discloses a building block compositely filled with a phase change material and a thermal insulation material, and belongs to the technical field of preparation of building materials. Two grooves with the same size are formed on the two sides of the building block; four rectangular through holes are formed in the building block, are formed in an upper row, a middle row and a lower row and are staggered from one another; two through holes with the same size are formed in the upper row; one through hole and the two grooves are formed in the middle row; one long through hole is formed in the lower row; an inorganic thermal insulation material is filled in the two through holes in the upper row and the through hole in the middle row; and a phase change material capsule bonding plate is filled in the through hole in the lower row. The building block compositely filled with the phase change material and the inorganic thermal insulation material has high temperature regulation and energy storage performance, thermal insulation performance and fireproof performance, and a heat bridge of a mortar joint between every two adjacent building blocks can be reduced due to the design of the grooves.

The invention provides a heat-insulating wall body based on a jet type light and energy-saving material, comprising a base wall body and further comprising an interface transition layer, an insulating layer, a protecting layer and a facing layer which are attached on the surface of the base wall body from inside to outside in sequence, wherein the protecting layer is composed of an anti-crack mortar layer and an insulating closed layer; the thickness of the insulating closed layer is 0.5-1mm; the thickness of the anti-crack mortar layer is 2-5mm; the insulating closed layer is located between the insulating layer and the anti-crack mortar layer; and the insulating layer is obtained by spraying foam inorganic light and energy-saving material. The invention also provides a construction method of the heat-insulating wall body. The heat-insulating wall body based on the jet type light and energy-saving material provided by the invention is high in construction speed and low in manufacturing cost, and has good thermal insulation performance.

The invention discloses a modular fabricated house which comprises a modularly-organized building main structure, an overall bathroom for an assembly house, a solar water heater, a rainwater collecting system, an FRP septic tank, an integrated kitchen for the assembly house, a solar photovoltaic power generation system, a wind power generation system and a wind-solar complementation type power utilization system.The modularly-organized building main structure comprisesa modular building roof, a modular building floor, a modular frame assembly, a modular door-and-window assembly and a modular building wallboard; the modular building roof comprisesa corrugated color steel plate, a roof reinforcing layer, a rock wool insulation layer, and a glass wool insulation layer; the modular building floor comprisesa corrugated color steel plate, a floor insulation layer, a solid wood composite board, an inorganic fiber-carbon fiber electric heating floor heating board and a PVC fireproof and waterproof floor; and the modular door-and-window assembly comprisesenergy-saving windows and a ventilation system. The modular fabricated house can realize modular assembly and can also achieve energy self-sufficiency.

The invention discloses thermal-insulation aerogel masonry mortar and a preparation method thereof. The thermal-insulation aerogel masonry mortar is characterized by being prepared from aerogel powder and a cementing material, wherein the aerogel powder contains an internal hydrophobic layer and a surface hydrophilic layer, and the surface hydrophilic layer is 0.1-100 mu m thick. The preparation method of the thermal-insulation aerogel masonry mortar comprises the following steps: (1) modifying the aerogel powder; (2) performing dry mixing on the aerogel powder obtained in the step (1) and the cementing material, and adding water for wet mixing. The aerogel powder and masonry mortar are composited, so that the aerogel powder is evenly distributed in the masonry mortar on the premise that the nano-porous structure of the aerogel powder is retained. The aerogel masonry mortar can be used for cementing thermal-insulating blocks, reduces thermal bridges of walls and improves the thermal insulation property of the walls.

The present invention relates to a process for production of insulating mineral foams produced from a slurry of cement and an aqueous foam. The invention also relates to the mineral foam obtained by this process, its uses and elements of construction produced with this mineral foam.

The invention relates to a multifunctional special-shaped block, which comprises: at least two longitudinal section materials, wherein said section material comprises top surface, bottom surface, two side surfaces and front and back end surfaces; the side surfaces of two nearby section materials are combined, while their front and back end surfaces are alternated and the top and bottom surfaces are alternated too; the top surface of one longitudinal section material is lower than another one, while its bottom surface is lower too. And the invention also provides relative wall. Said brick has better thermal-insulated effect, anti-crack function and anti-leakage function.

The invention discloses a roof eaves board, relates to modeling, construction and mounting construction of the roof eaves board, and aims at the problems of single roof modeling and the like. The roof eaves board is characterized in that firstly, a slope of the eaves board is smaller than that of a roof board, and an overhanging eaves type eaves board modeling is formed; secondly, a corner eaves board in the position of an inclined roof ridge at the corner of a roof corner is bent upward, and a structure of an overhanging eaves type modeling of the corner roof ridge is formed; thirdly, an anti-shearing and anti-pulling net is arranged in the light and thermal-insulation roof eaves board; fourthly, reinforcing steel bars, anchor bolts and the anti-pulling net are used for mounting and prefabricating the light and thermal-insulation roof eaves board; fifthly, a first thermal-insulation bridge-cut-off structure of the roof eaves board is characterized in that a bearing is arranged on an outer wall bearing member, a truss or a net rack is mounted on the bearing, then the bearing is connected with a coupling beam, and the light roof eaves board is connected with the coupling beam; sixthly, a second thermal-insulation bridge-cut-off structure of the roof eaves board is characterized in that a cantilever beam is arranged on the outer wall bearing member, and the light roof eaves board is located on the cantilever beam; seventhly, drain holes are formed in the roof eaves board; and eighthly, the self-waterproof roof eaves board has a waterproof thermal insulation layer. The roof eaves board is attractive in modeling, low in manufacturing cost and convenient to construct.

The invention discloses a fireproof insulation board of an outer wall.The fireproof insulation board is prepared from 31-34 parts of cement, 32-39 parts of fly ash, 4-7 parts of quartz powder, 2-5 parts of paper pulp, 9-14 parts of inorganic fibers, 4-9 parts of lime, 1-3 parts of a water reducing agent, 1-3 parts of a composite activity activator, 35-85 parts of fly ash, 11-42 parts of vitrified microbeads, 12-35 parts of acrylic acid emulsion, 4-9 parts of a halogen-free phosphorus series, 2-11 parts of glass fibers, 1-6 parts of a defoaming agent and 1-4 parts of a dispersing agent.The outer side of a main structure is wrapped by the fireproof insulation board of the outer wall, therefore, the main structure can be protected, and the life of a building can be prolonged; hot bridges of a building structure can be effectively decreased, the effective space of the building is increased, the wall surface water condensation phenomenon caused by cold bridges and the hot bridges can be eliminated, and the living comfort degree is improved; the physical performances such as sound insulation and heat insulation of other building materials are not influenced; the fireproof insulation board is more beneficial for volatilization of harmful substances in an outer wall heat insulation material.

The invention discloses a mobile house. The house comprises a house body and a sliding floor; the house body comprises a roof and a side wall, wherein the side wall comprises a composite wall body, and a ventilation system is arranged on the side wall; a solar water heater, a rainwater collecting system, a solar photovoltaic power generation system and a solar photovoltaic wind power generation system, a wind-solar complementary electricity utilization system composed of the solar photovoltaic power generation system and the solar photovoltaic wind power generation system are arranged on the roof; a water outlet of the rainwater collecting system is connected with a water inlet of the solar water heater; the water outlet of the solar water heater is connected with water equipments in the room and a heating heat exchange pipe correspondingly; solar heat storage and heat preservation modules are arranged in the sliding floor; the house body further comprises an integral bathroom and an integral kitchen. According to the mobile house, energy self-sufficiency can be realized under the condition that the energy is shortage and the living environment is bad, and the house with the comfortable living requirements of users can be guaranteed.

The invention discloses multilayer ceramic tissue paper capable of realizing gradient temperature resistance. The multilayer ceramic tissue paper is a heterogeneous material and is composed of singlelayers of ceramic tissue paper. Ceramic fibers are horizontally distributed on single layers, and no longitudinal penetration fiber exists. Zirconium latex content is in graded distribution along a thickness direction and is gradually decreased from the surface layer to the internal layer, different zirconium latex content corresponds to thermal insulation of different temperature intervals, material cost is reduced, and energy conservation and emission reduction are realized. A compound additive is added into the tissue paper. When a hot side temperature is relatively high, a melting phenomenon occurs among low-melting-point glass fibers in the compound additive, and the compound additive and an inorganic adhesive interact to realize seamless bonding between layers. Meanwhile, zirconium latex is changed into zirconia fibers after being heated, and the zirconia fibers are coated around the ceramic fibers, so that temperature resistance of the tissue paper is improved, and overall high-temperature structural strength of the tissue paper is further improved.

The invention relates to a hole heat insulation break bridge structure of a composite heat-insulation wall door and window, which enhances the energy saving heat preservation effect of the wall for reducing hole hot bridges of doors and windows because of the large heat transmission at the periphery of the hole. The structure 1 comprises a heat preservation layer, an indoor protective layer, an outdoor protective layer, doors and windows, wherein the heat preservation layer is arranged between the indoor protective layer and the outdoor protective layer, and the doors and windows are on the hole heat preservation layer; the structure 2 comprises a heat preservation layer, a basic unit wall, an outdoor protective layer, doors and windows, wherein the heat preservation layer is arranged between the basic unit layer and the outdoor protective layer, and the doors and windows are fixed on the hole heat preservation layer; the structure 3 comprises a heat preservation layer, a basic unit wall, an alkali-resisting mesh cloth, an outer leaf masonry, doors and windows, wherein heat preservation layer is arranged between the basic unit wall and the outer leaf masonry, and the doors and windows are on the hole alkali-resisting mesh cloth; and the structure 4 comprises a heat preservation layer, a basic unit wall, an alkali-resisting mesh cloth, an outdoor thin plastering protective layer, doors and windows, wherein the heat preservation layer is arranged between the basic unit wall and the outdoor thin plastering protective layer, and the doors and windows are on the hole alkali-resisting mesh cloth. The invention can significantly reduce heat loss around the hole, and enhances the energy-saving heat preservation effect of the composite wall.

The invention provides rigid polyurethane foam based on low-vacuum-degree closed space as well as a preparation method and application of the rigid polyurethane foam. The rigid polyurethane foam takes high-viscosity polyether polyol as a main raw material, and the polyether polyol has the characteristics of high viscosity and strong gas adsorption capacity, so the stability of a foam wall in a flowing process can be effectively improved, and bubbles on the surface of the foam are reduced. In a closed space with a certain vacuum degree and an environment in which the absolute value of the pressure of a foaming layer of a box body is lower, a system containing a high foaming agent content or a low-boiling-point foaming agent is high in foam flowing speed and easy to undergo shearing with an inner container and a metal shell, and meanwhile, air is wrapped in a bending process so as to form bubbles, so a technical problem in the prior art can be effectively solved by using the system.

The invention discloses a high temperature hot delivery steel billet transportation special vehicle chassis. The high temperature hot delivery steel billet transportation special vehicle chassis comprises a chassis component and a low-layer floor, a heat preservation thermal insulation layer assembly is arranged above the low-layer floor, and comprises a thermal insulation layer cross beam, a thermal insulation layer side beam, a thermal insulation layer support cross beam, a thermal insulation layer longitudinal beam and an upper-layer floor, the thermal insulation layer longitudinal beam is placed in the middle of the chassis and is welded to the thermal insulation layer cross beam, the thermal insulation layer cross beam and the thermal insulation layer support cross beam are assembled and welded into a simply supported beam structure, then the simply supported beam structure and the thermal insulation layer side beam are assembled and welded to form a frame-shaped grid beam structure, the frame-shaped grid beam structure is paved with the upper-layer floor, and a cavity formed by the whole frame-shaped grid beam structure is filled with a heat preservation material. The high temperature hot delivery steel billet transportation special vehicle chassis has a good heat preservation function, and the chassis is applicable to safe loading and transportation of a steel billet not higher than 700 DEG C in a steel enterprise; moreover, the thickness of the heat preservation material can be adjusted according to the temperature of the loaded and transported steel billet, therefore achieving safe loading and transportation of steel billets with different temperatures in all steel enterprises.

The invention relates to a bridge-cutoff self-insulation concrete block for building energy conservation and a fabrication technology of the block, and belongs to the technical field of building materials. The block is formed by combining a bridge-cutoff concrete hollow block provided with trapezoidal bulges and trapezoidal grooves and insulation materials, wherein the insulation materials are located in two cavities defined by the concrete hollow block; the concrete hollow block is fabricated from materials such as cement and fine stone, and provided with two bridge-cutoff connecting blocks to connect concrete; each bridge-cutoff connecting block consists of a plurality of glass fiber reinforcement ribs and polyurethane, and is fabricated in a bridge-cutoff connecting block mold; the glass fiber reinforcement ribs in the bridge-cutoff connecting blocks do not pass through the insulation materials of the block, so that the integrity of the insulation materials is kept. The block is applicable to construction of bearing and non-bearing walls, and has the advantages of high convenience in fabrication, good mechanical property, good insulation property, low cost and the like.

The invention discloses an external thermal insulation structure of a heating box. The external thermal insulation structure comprises an inner frame embedded with a thermal insulation layer and outer panels fixedly connected with the inner frame, each outer panel comprises a panel body, a connecting bolt fixedly arranged on the inner surface of the panel body and a support part which is arranged long the transverse direction and longitudinal directions of the panel body and fixedly connected with the panel body through the connecting bolt. According to the external thermal insulation structure, on the premise that the thermal insulation effect is guaranteed, the problem that dust is accumulated and is not prone to cleaning is relieved; due to the fact that the heat radiating areas of the outer panels themselves are small, thermal bridge is reduced, and meanwhile the air heat insulation effect is produced in the cavities of the outer panels; by means of actual measurement, the surface temperature of the heating box adopting the outer panels is about 5 DEG C lower than that of corrugated boards, and the energy can be effectively saved by about 5%.

The invention relates to a thermal insulating vessel, in particular to a low temperature liquid storage and transportation vessel. An inner lining suspension type low temperature liquid storage and transportation vessel comprises an outer lining and an inner lining, wherein a vacuum cavity is formed between the outer lining and the inner lining; a plurality of superconduction magnetic suspension units and a movable rigid support device are arranged in the vacuum cavity; and the arrangement position of the movable rigid support device is higher than that of the superconduction magnetic suspension units at the lower part to realize conversion of rigid contact and magnetic suspension between the outer lining and the inner lining. Compared with the prior art, the suspended inner lining can effectively reduce a heat bridge and reduces heat conduction heat leakage of the storage tank to prolong the storage time of low temperature liquid and reduce the potential safety hazard caused by leakage.

The invention discloses a threshold assembly and a container. The threshold assembly is used for the container; the threshold assembly includes an outer end plate, horizontal connecting pieces and intermediate connecting pieces; the outer end plate includes a horizontal part and a vertical part; the horizontal connecting pieces are connected to a floor of the container; the intermediate connectingpieces are connected to the outer end plate and the horizontal connecting pieces; one ends of the intermediate connecting pieces stretch into the position where the horizontal part and the vertical part are intersected, and the other ends of the intermediate connecting pieces are provided with inserting ports and clamping connection grooves; one ends of the horizontal connecting pieces are provided with inserting parts; and the inserting parts can be inserted into the clamping connection grooves through the inserting ports, so that the horizontal connecting pieces can be connected to the intermediate connecting pieces. According to the threshold assembly, gaps among the horizontal connecting pieces, the intermediate connecting pieces and the outer end plate can be sealed when a forklift truck applies friction force to the threshold assembly, so that moisture or other liquid can be prevented from infiltrating into the internal of the threshold assembly to cause the corrosion of steel.

The invention discloses a high-strength thermal insulating epoxy resin composition used for solving the technical problems that the thermal insulating material used by an existing supporting saddle for a heat transport pipeline is not high in strength and is easily subjected to heat bridge transfer. The composition comprises the following substances based on 100 parts by weight: 60-80 parts of epoxy resin, 15-30 parts of glass fiber yarn, 2-4 parts of microporous calcium silicate, 1-3 parts of curing agent, and 1-3 parts of accelerating agent. A reinforced fiber and an epoxy resin based composite material are presoaked in a proportion, hot-pressed, and then prepared to a platy insulation pad or an insulation pad in a needed shape. The composition disclosed by the invention can be applied to the pipeline supporting saddle to function as a part of a bearing and thermal insulating structure of the pipeline supporting saddle so as to effectively prevent and reduce the occurrence of a heat bridge phenomenon on the supporting saddle for the heat transport pipeline, and the energy-saving effect is obvious.

The invention provides a vacuum thermal isolation and a heat insulation layer and heat insulation system for building and a construction method thereof, wherein the vacuum thermal isolation and heat insulation layer for building is formed by splicing vacuum thermal isolation plates for building and vacuum thermal isolation strips for building, the upper and lower adjacent vacuum thermal isolation plates for building are tightly pasted, vertical lap joint seams are arranged between the left and right adjacent vacuum thermal isolation plates for building, in addition, in the lap joint seams, the skirt edges of the vacuum thermal isolation plates are fixed on a base layer wall body through fixing elements, and the vacuum thermal isolation strips for building are arranged in the lap joint seams formed between the left and right adjacent vacuum thermal isolation plates for building, and are pasted and covered on the skirt edges. The vacuum thermal isolation and heat insulation layer and the heat insulation system have the characteristics that the heat insulation and fireproof performance are excellent, and the like. The combustion grade is grade A, the specified requirements with the building energy-saving rate of 75 percent can be met, the great thickness reduction can also realized through being compared with that adopting the conventional organic heat insulation materials as heat insulation layers, and the load of a structural outer wall and the foundation can be reduced.

The invention relates to a dismountable heat insulation device of a railway tank car. The dismountable heat insulation device comprises a heat insulation case, wherein the heat insulation case comprises a plurality of heat insulation case tube sections arranged in the length direction of a tank car tank body; each heat insulation casing tube section comprises an upper part and a lower part; each heat insulation casing tube section is detachably connected with the tank body through a connecting component; a gap is formed between the two adjacent heat insulation casing tube sections; the gap can meet the operation requirements of the connection component. The heat insulation device consists of the plurality of heat insulation casing tube sections; the installation is convenient; the local dismounting can be realized; the workload and the work intensity during the manufacturing and overhaul of the tank car can be greatly reduced.

The invention relates to a steel-mesh-containing vacuum thermal insulation insulating layer and an insulating system for a building and a construction method of the insulating layer and the insulating system. The steel-mesh-containing vacuum thermal insulation insulating layer for the building comprises a vacuum thermal insulation plate for a building and a vacuum thermal insulation strip for the building as well as a steel mesh arranged outside the vacuum thermal insulation strip for the building and the vacuum thermal insulation strip for the building, wherein a prefabricated hole is formed in the vacuum thermal insulation strip for the building, a fixed part penetrates through the prefabricated hole, and the steel mesh is fixed on a base-layer wall body. The steel-mesh-containing vacuum thermal insulation insulating layer and the insulating system for the building have the characteristics of excellent thermal insulation property, excellent fireproof performance and the like, burning grade is A, the specified requirement that energy saving ratio of the building is 75% can be met, and the fixed part and the steel mesh in the steel-mesh-containing vacuum thermal insulation insulating layer for the building can guarantee that a facing layer paved by adopting objects with certain weight, such as ceramic tiles, marble slabs and mosaic tiles, can be firmly mounted and hardly falls off.

The invention discloses multilayer ceramic tissue paper capable of realizing gradient temperature resistance. The multilayer ceramic tissue paper is a heterogeneous material and is composed of singlelayers of ceramic tissue paper. Ceramic fibers are horizontally distributed on single layers, and no longitudinal penetration fiber exists. Zirconium latex content is in graded distribution along a thickness direction and is gradually decreased from the surface layer to the internal layer, different zirconium latex content corresponds to thermal insulation of different temperature intervals, material cost is reduced, and energy conservation and emission reduction are realized. A compound additive is added into the tissue paper. When a hot side temperature is relatively high, a melting phenomenon occurs among low-melting-point glass fibers in the compound additive, and the compound additive and an inorganic adhesive interact to realize seamless bonding between layers. Meanwhile, zirconium latex is changed into zirconia fibers after being heated, and the zirconia fibers are coated around the ceramic fibers, so that temperature resistance of the tissue paper is improved, and overall high-temperature structural strength of the tissue paper is further improved.

The invention relates to a multifunctional special-shaped block, which comprises: at least two longitudinal section materials, wherein said section material comprises top surface, bottom surface, two side surfaces and front and back end surfaces; the side surfaces of two nearby section materials are combined, while their front and back end surfaces are alternated and the top and bottom surfaces are alternated too; the top surface of one longitudinal section material is lower than another one, while its bottom surface is lower too. And the invention also provides relative wall. Said brick has better thermal-insulated effect, anti-crack function and anti-leakage function.

The invention discloses a heat preservation structure and method of an overhead pipeline support of a near-zero thermal bridge. The heat preservation structure comprises a working pipe, a heat preservation layer, a base, an energy-saving heat preservation fixing support, a zero thermal bridge sliding support and an outer protection steel plate. On one hand, the thermal bridge is reduced while the effect of supporting and fixing the working pipe is achieved through the energy-saving heat preservation fixing support, and on the other hand, the thermal bridge is eliminated while the heat preservation layer and the outer protection steel plate are fixed through the zero thermal bridge sliding support. Finally, the effects of reducing the thermal bridge to the maximum extent and reducing heat dissipation loss are achieved and guaranteed while the working pipe and the heat preservation layer are fixed.

The invention relates to the field of building construction, and solves the problem that in the prior art, a split bolt sleeve does not have the supporting and positioning effects on a heat-preservation outer formwork. A tubular connecting piece comprises a tube body, an axial channel of the tube body penetrates through the tube body to form openings in the two ends of the tube body, a first limiting piece and a second limiting piece are arranged on the outer side wall of the tube body, and the second limiting piece is located at one end of the tube body. When the tubular connecting piece is used, the first limiting piece and the second limiting piece are located on the two sides of the heat-preservation outer formwork, positioning of the heat-preservation outer formwork is achieved, one end of the tube body abuts against the inner formwork, supporting of the inner formwork is achieved, and after the inner formwork and the heat-preservation outer formwork are tensioned through the split bolt, the inner formwork and the heat-preservation outer formwork are fixed. A heat-preservation outer formwork cast-in-place concrete wall comprises a wall body, a heat-preservation outer formworkand the tubular connecting piece, the tube body penetrates through the wall body and the heat-preservation outer formwork, and the first limiting piece and the second limiting piece are located on thetwo sides of the heat-preservation outer formwork respectively.