1001results about "Passive houses" patented technology

The invention provides a green building exterior wall coating with a heat insulation function and a preparation process thereof. The method comprises the following steps: S1, determining raw material formula parameters; s2, pre-dispersing the raw materials; s3, carrying out grinding treatment on the pre-dispersed slurry; s4, mixing and blending the coating; s5, performing performance detection; and S6, packaging the qualified finished coating. Aiming at the core requirements of high heat insulation, low pollution and easy construction of the green building wall paint, the invention constructs a set of full-process preparation process integrating a multi-objective optimization algorithm and real-time feedback control, and finally realizes collaborative optimization of paint performance and production efficiency through scientific design of a raw material formula and precise control of production links.

The utility model particularly relates to an automatic air interchanger for an indoor suite door of a passive building. The automatic air interchanger solves the problem that people having a rest are lack of oxygen or dizzy and lack of strength due to the fact that the concentration of indoor CO2 and PM2.5 cannot be detected in time during night rest of an existing passive building. A lock is arranged on the suite door, an outer ventilation opening is formed in an outer side plate at the top of the door pocket line, an inner ventilation opening located on the inner side of the suite door is formed in a top plate of the door pocket line, an air duct communicated with the outer ventilation opening and the inner ventilation opening is arranged between the outer ventilation opening and the inner ventilation opening, and a power transmission mechanism and a rotary ventilation mechanism are arranged in the door pocket line. Automatic ventilation of the public area and the indoor room is achieved, the CO2 concentration and the PM2.5 concentration in the room are equivalent to those in the public area, the CO2 and PM2.5 concentration detecting instrument installed in the public area can detect the concentration of harmful gas in the closed room in time, the fresh air system is started in time to convey fresh air into the room, the air cleanliness in each independent room is improved, and the indoor environment is protected. And the comfort level of the living environment is further improved.

The application provides a curtain wall embedded part for sandwich thermal insulation wall and a construction method thereof, and solves the problems of the existing sandwich thermal insulation wall curtain wall, which adopts a post-embedded part construction method, destroys the overall thermal insulation effect of the outer wall, and has low stress load strength. The application comprises a vertically arranged second embedded plate, a plurality of embedded bars extending to the right are fixedly arranged on the right side of the second embedded plate, the second embedded plate and the embedded bars are used for being embedded in an inner leaf wall, a steel reinforcement cage is arranged in the inner leaf wall, and the embedded bars are fixedly connected with the steel reinforcement cage; a sealing connecting plate structure extending to the left is fixedly arranged on the left side of the second embedded plate, an inner cavity with a left opening is arranged in the sealing connecting plate structure, a first flexible thermal insulation filling block with elasticity is filled in the inner cavity, a vertically arranged adapter substrate is fixedly arranged on the left end of the sealing connecting plate structure, a waist hole extending in the front-rear direction and penetrating through left and right is arranged on the adapter substrate, and the waist hole is in communication with the left and right of the inner cavity.

A composite aerogel heat insulation type energy-saving curtain wall comprises an outer frame assembly and a curtain wall assembly installed in the outer frame assembly, and the outer frame assembly is composed of four frame rods which define a frame-shaped structure; an expansion pressing piece used for abutting against the side edge of the curtain wall assembly in a wrapping mode is formed in the outer frame assembly, and installation supporting assemblies used for clamping the curtain wall assembly are installed on the two oppositely-arranged frame rods. Compared with the prior art, the two sides of the curtain wall assembly are limited and supported through the inserting installation pieces inserted into the frame rods, installation is convenient, negative pressure is controlled to be generated between the negative pressure holes and the curtain wall assembly under the action of the auxiliary installation pieces in the frame rods, and the curtain wall assembly is prevented from being damaged while the two sides of the curtain wall assembly are limited and supported through the inserting installation pieces. And the expansion state of the expansion pressing piece is controlled through the push-pull assembly, so that the side edge of the curtain wall assembly is subjected to wrapping type abutting, and the installation stability of the curtain wall assembly is further improved.

The invention relates to the technical field of building construction, in particular to an energy-saving and material-reducing type fabricated building wall which comprises a wall body and further comprises a mounting mechanism, a connecting mechanism, a connecting mechanism and a connecting mechanism, and the mounting mechanism is arranged in the inner wall of the wall body; the sealing mechanism is arranged in the inner wall of the wall body main body; the buffering mechanism is arranged on the outer wall of the wall body main body; wherein the mounting mechanism comprises a heat preservation layer, the outer wall of the heat preservation layer is fixedly connected with a mounting block, the inner wall of the mounting block is elastically connected with a sliding block through a reset spring, and the outer wall of the sliding block is fixedly connected with an insertion block; through the arrangement of the mounting mechanism, the heat preservation layer is inserted into the wall body main body, mounting can be completed by clamping the inserting block and the inserting groove, when the heat preservation layer is dismounted, the rotating block is rotated clockwise, the inserting block can be pulled to move through winding of the pull rope, the inserting block is separated from the inserting groove, the heat preservation layer is taken out, operation is easy and fast, and the field construction efficiency is improved.

To provide a building construction method that can reduce the weight of the entire building and easily strengthen the heat insulation property and structural strength at low cost.SOLUTION: The building construction method includes the steps of: filling the hollow interior portions with insulating materials 13C, 23C to manufacture a first wall panel 10C and a second wall panel 20C; placing the side ends of a floor panel 60 of the lower floor on a foundation 50 and placing a half base 53 on the outside of the side ends of the floor panel 60; placing the first wall panel 10C of the lower floor on the side ends of the floor panel 60 and placing the second wall panel 20C of the lower floor on the half base 53; arranging the first and second wall panels 10C, 20C of the lower floor within a wall body that forms a wall line in a straight line in a plan view and arranging them side by side in a back-to-back state with face bars on one side facing each other along the thickness direction of the wall body without any spacing between them; and fastening the upper parts of anchor bolts 51 to the lower ends of the first and second wall panels 10C, 20C of the lower floor.SELECTED DRAWING: Figure 20

The invention discloses a frame type energy-saving curtain wall combination and bearing device, and belongs to the technical field of energy-saving curtain walls. A frame type energy-saving curtain wall set comprises two glass panels and glass protective edges, and the glass protective edges are arranged on the peripheries of the two glass panels. Glass mounting grooves are formed in the middle positions of the upper side and the lower side of the glass protective edge, first inserting grooves are formed in the groove bottoms and the side walls of the glass mounting grooves, and side sealing strips and middle sealing strips are inserted into the first inserting grooves. According to the frame type energy-saving curtain wall combination and bearing device, the design of double glass panels is adopted, a sealed air layer is formed between the double glass panels, heat conduction and sound wave transmission are effectively blocked, the heat preservation performance and the sound insulation performance of a building are remarkably improved, energy consumption is reduced, and the indoor environment comfort degree is improved; a high-strength rectangular connecting frame is formed through a double-inserting-connection structure formed by the inserting columns and the second locking plates and through the combination of self-tapping screws for final fastening.

The invention relates to the technical field of building decoration, and discloses a breathable heat preservation and decoration integrated system which comprises fixing assemblies fixed to the surface of a wall and spaced from the surface of the wall, limiting parts are arranged on the sides, away from the surface of the wall, of the fixing assemblies, and the adjacent limiting parts of the adjacent fixing assemblies are used for limiting a decoration plate. The two ends of the decorative plate are locked and fixed to the two adjacent fixing assemblies through locking pieces correspondingly, and a finished heat preservation plate is installed in a cavity between the decorative plate and the surface of the wall body or heat preservation slurry is poured into the cavity between the decorative plate and the surface of the wall body. According to the heat preservation and decoration integrated system, the limiting part is arranged on the side, away from the surface of the wall body, of the fixing assembly, the decoration plate is limited through the limiting part, the decoration plate and the fixing assembly are further connected and fixed through the locking piece, assembling is easy and convenient, and the surface of the assembled heat preservation and decoration integrated system is smooth and free of any protruding structure.

The application discloses a kind of thin layer building energy-saving thermal insulation materials based on fractal structure composite fiber and preparation method thereof, it is characterized in that, preparation according to following method: fractal structure metal material is deposited on net base or fabric base, then CuO light-absorbing material layer is loaded on fractal structure metal material surface, to obtain thin layer building energy-saving thermal insulation materials based on fractal structure composite fiber.The material of the application has the characteristics of light transmission and air permeability.At the same time, the material is attached to the surface of the building material, the material itself can quickly heat up under sunlight, change the temperature gradient spatial distribution from the building interior to the outside, and can block the heat conduction between the building interior and exterior.The fractal structure thermal insulation curtain prepared by the application has the advantages of good thermal insulation effect and simple preparation method, which is beneficial to improve the utilization rate of sunlight in winter on plateau.

This invention discloses a prefabricated fireproof and thermally insulated sandwich wall panel and its manufacturing method. The key technical points are: the prefabricated fireproof and thermally insulated sandwich wall panel includes an inner concrete leaf wall, a sandwich insulation layer, and an outer leaf wall panel, wherein the sandwich insulation layer is located between the inner concrete leaf wall and the outer leaf wall panel. This invention achieves integrated structural, thermal insulation, and decorative functions; reduces weight by more than 20% while maintaining the same energy-saving effect; improves energy-saving performance by more than 30% under the same thickness conditions; effectively reduces the thermal bridging effect of the exterior wall panel; and improves the fire resistance limit of prefabricated components under fire or high-temperature conditions.

The application relates to the technical field of temporary housing, in particular to an energy-saving building thermal insulation wall body of a concrete structure and a construction method thereof, a first shell is inlaid on one side of a concrete structure layer close to a thermal insulation layer, a first elastic bag is fixed on the inner wall of the first shell, and a moving plate is fixed on one side of the first elastic bag facing the thermal insulation layer; a second shell is inlaid on one side of the concrete structure layer close to a sealing plate, and a second elastic bag is arranged in the second shell. The position of the moving plate is controlled, the extension and retraction state of the first elastic bag is adjusted, in a high-temperature scene in summer, the moving plate can be flexibly controlled according to real-time requirements, the first elastic bag can be kept in a compressed state, and heat exchange with the external high-temperature environment is avoided. Compared with the prior art, the scheme can actively avoid the risk of heat accumulation, effectively relieve the stuffy problem in the house, and greatly improve the comfort of the temporary housing.

The invention relates to the technical field of curtain walls, in particular to an energy-saving building curtain wall. Comprising a square wallboard, a mounting seat is arranged in the center of the rear side of the wallboard; mounting lugs with holes are fixedly connected to four corners of the mounting seat; the center of the rear side of the wallboard is fixedly connected with a center rod; the end part of the central rod is spherically connected with a middle spherical shell on the mounting seat through a middle spherical center; a transverse groove is formed in the mounting seat in a left-right penetrating manner; the transverse groove is in sliding connection with a transverse strip and a transverse rod which are connected with each other; a transverse triangular groove is formed in the face, facing the wall plate, of the transverse strip. By controlling the connection of the cross rods and the vertical rods on the two adjacent wallboards, the vertical rods and the cross rods in the same vertical direction and the same horizontal direction of the building curtain wall can integrally move, and then the wallboards in the same vertical direction and the same horizontal direction can be synchronously driven to be opened and closed; and compared with an original independent wallboard driving mode, the cost of a building curtain wall is reduced, and the purpose of saving energy is achieved.

The invention belongs to the field of building components, and particularly relates to a prefabricated lattice wall. According to the technical scheme, the structure is formed by splicing a plurality of aerated concrete reinforced plates, a plurality of transverse penetrating type circular-section grouting holes are formed in the aerated concrete reinforced plates, transverse penetrating type semicircular-section grouting holes are formed in the short edges of the aerated concrete reinforced plates, and vertical penetrating type semicircular-section grouting holes are formed in the long edges of the aerated concrete reinforced plates; the two vertical penetrating type semicircular section grouting holes in the splicing position of every two adjacent aerated concrete reinforced plates are spliced to form a vertical circular section grouting hole, and criss-cross hollow grids are formed. Transverse steel bars and vertical steel bars are respectively inserted into the hollow grids to form a criss-cross steel bar net, grouting materials are poured into the hollow grids, and the steel bar net and the grouting materials form a lattice-shaped connecting structure together. According to the prefabricated lattice type wall body, the heat preservation performance, the shock resistance and the construction precision of the wall body can be effectively improved.

The utility model relates to the technical field of energy-saving buildings, in particular to a passive house wall body heat preservation structure which comprises a wall body, light steel keels are fixedly arranged on the wall body, a heat preservation layer is arranged on the outer side of the light steel keels and fixedly connected with the light steel keels through anchoring parts, a heat insulation layer is connected to the outer side of the heat preservation layer through a bonding layer, and a facing layer is arranged on the outer side of the heat insulation layer. Temperature sensors are mounted on the surfaces of the heat-insulating layers; an adjusting cavity box is arranged in the heat preservation layer, the upper end of the adjusting cavity box is connected with a water injection hose, the lower end of the adjusting cavity box is connected with a drainage pipe, the outer end of the drainage pipe extends out of the front surface of the heat preservation layer, and an electric control drainage valve is installed at the outer end of the drainage pipe and connected with an external control system. According to the passive house wall structure, multiple layers of composite heat preservation materials are adopted, the heat preservation performance of the wall is effectively improved, meanwhile, dynamic thermal inertia adjustment is achieved through the built-in water injection and drainage cavity groove, the heat preservation and heat insulation performance is improved, the thermal performance of the passive house wall structure is improved, energy consumption is reduced, and the living comfort is improved.

The application provides a telescopic joint device for energy-saving glass of curtain wall, and relates to the technical field of building, which comprises an outer frame structure, a horizontal clamping groove seat, a buffer device one, a corner telescopic joint mechanism, a vertical clamping groove seat and a buffer device two. The application has the characteristics of reasonable and simple structure, low production cost, convenient installation and complete functions. The outer frame structure is stably connected through a specific connecting structure, can provide stable support for the whole device, and guarantees the reliability of the device base frame. The elastic effect of the buffer device can effectively buffer the force generated when the curtain wall expands and contracts, and the limiting structure can guarantee the stability of the buffering process, improving the buffering effect and service life of the device. The telescopic joint mechanism arranged at the corner position can adapt to the complex expansion and deformation at the corner through the synergistic effect of the buffer connecting mechanism and the connecting device, avoid stress concentration, and ensure the safety of the corner position.

The utility model relates to the field of steel structures, in particular to an energy-saving fireproof steel structure of a green building, and adopts the technical scheme that the energy-saving fireproof steel structure of the green building comprises a gypsum shell, I-shaped steel, a fireproof frame plate, a fireproof frame, an expansion plate, a fireproof plate and fireproof cotton, the expansion plate is made of expanded silicate materials, the fireproof cotton is of an expansion type, and the fireproof plate is made of expanded graphite materials. First groove bodies are formed in the front ends and the rear ends of the fireproof frames in a penetrating mode, expansion plates are installed in the first groove bodies, extending frames distributed at equal intervals are fixedly connected to the ends, close to each other, of the fireproof frames, and limiting frames distributed at equal intervals are fixedly connected to the ends, away from each other, of the fireproof frame plates. By means of the expansion plates distributed on the upper side and the lower side of the I-shaped steel and the fireproof plates and the fireproof cotton distributed on the inner walls of the left side and the right side of the I-shaped steel, when a fire disaster occurs, the I-shaped steel can be heated to expand so as to fill a gap between the gypsum shell and the I-shaped steel, and the expansion materials form an internal fire insulation layer to isolate external high temperature so as to protect the I-shaped steel.

The utility model discloses a building outer wall heat insulation structure, which relates to the technical field of building energy conservation and comprises a connecting component and a wall component slidably arranged on one side of the connecting component. The connecting assembly comprises a connecting main body, an upper arc-shaped groove is formed in the upper end of the connecting main body, a lower arc-shaped groove is formed in the lower end of the connecting main body, the upper arc-shaped groove is attached to the lower arc-shaped groove in the lower end of the adjacent connecting main body, a connecting plate is fixedly connected to one side of the connecting main body, and a connecting groove is formed in the other side of the connecting main body. By means of the connecting assembly and the wall body assembly, the whole wall body is converted into formwork splicing, the installation efficiency is effectively improved, meanwhile, the wall body is separated, the damaged wall body can be independently replaced when loss occurs, and the repair efficiency is effectively improved.

The utility model relates to the technical field of green buildings, in particular to a green building wall structure. According to the technical scheme, the structure comprises two outer walls, an inner wall is arranged between the two outer walls and comprises inner wall surface layers arranged on the two sides, heat insulation layers are arranged on the sides, close to each other, of the two inner wall surface layers, and damp-proof layers are arranged on the portions, between the two inner wall surface layers, of the two sides of the heat insulation layers; multiple sets of reinforcing rods are arranged on the sides, close to each other, of the two sets of outer walls, reinforcing rib frames are arranged in each set of outer walls, assembling clamping strips are arranged on the two sides, away from the assembling grooves, of the inner walls, and multiple sets of pipeline cavities are formed in the outer walls and the inner walls. The wall body has excellent heat insulation and heat preservation performance through the arrangement that the outer wall and the inner wall are matched with each other, energy consumption of a building can be greatly reduced, wall body materials can be recycled, generation of building waste is reduced, and reduction of resource waste is facilitated.

The invention discloses a heat preservation curtain wall structure applied to a building, and relates to the technical field of building curtain wall structures, the heat preservation curtain wall structure comprises a curtain plate assembly, the curtain plate assembly comprises a curtain plate main body, a fireproof part is embedded in the outer surface of the curtain plate main body, a guide groove is formed in the curtain plate main body, and a communicating pipe is fixedly connected to the curtain plate main body; a butt joint cylinder is fixedly connected to one side of the curtain plate body and arranged at one end of a communicating pipe in a sleeving mode, one end of the communicating pipe penetrates through the curtain plate body and communicates with the fireproof part, and a limiting hole is formed in the surface of the communicating pipe; and the mounting assembly comprises a mounting seat, an air cavity is formed in the mounting seat, a butt joint pipe is rotationally connected to the mounting seat, and one end of the butt joint pipe communicates with the air cavity. Active fire prevention can be performed through the curtain plate assembly under cooperation of the mounting assembly, upward flames can be actively hindered after a building is on fire, fire spreading can be actively intervened when a fire occurs, and the probability of causing large accidents is reduced.

The anti-cracking construction method of the FTC phase-change heat-preservation paste material comprises the following steps of pretreatment of a base layer, construction of a bottom FTC phase-change heat-preservation paste material layer, a separation seam, construction of a surface FTC phase-change heat-preservation paste material layer, a first layer of gridding cloth, construction of a first anti-cracking mortar layer, construction of a second layer of gridding cloth and construction of a second anti-cracking mortar layer in sequence, maintenance and acceptance. According to the construction method, the anti-cracking performance of the FTC phase change heat preservation layer is improved.

The utility model belongs to the field of heat preservation structures, particularly relates to a building energy-saving heat preservation structure, and aims to solve the problems that a plurality of L-shaped clamping blocks are connected one by one in the prior art, the connectivity between heat preservation structures is poor, and the integrality is low, and provides the following scheme that the building energy-saving heat preservation structure comprises a wall body, and a cement leveling layer is arranged on one side of the wall body; an adhesion layer is arranged on one side of the cement leveling layer, a plurality of expanded polystyrene boards are arranged on one side of the adhesion layer, second reinforcing layers are arranged on one sides of the expanded polystyrene boards, the same glass wool fireproof layer is arranged on one sides of the second reinforcing layers, a first reinforcing layer is arranged on one side of the glass wool fireproof layer, and a second reinforcing layer is arranged on one side of the first reinforcing layer. The building energy-saving heat preservation structure has the advantages that the building energy-saving heat preservation structure has remarkable advantages in the aspects of heat preservation performance, structural stability, crack resistance, waterproof performance, construction convenience, environmental protection sustainability and the like, and a new solution is provided for energy conservation and heat preservation of modern buildings.

The utility model discloses a high-precision non-dismantling self-heat-preservation mould frame device and a window opening structure comprising the high-precision non-dismantling self-heat-preservation mould frame device, the high-precision non-dismantling self-heat-preservation mould frame device comprises a plurality of mould frame section bar pieces, and the mould frame section bar pieces abut against one another end to end to be assembled into a frame structure so that the frame structure can be used for installing a main frame. The mold frame profile piece comprises a heat preservation layer, an auxiliary frame and a profile plate, the heat preservation layer is connected to one side or two sides of the auxiliary frame, and the profile plate is connected to the heat preservation layer and one end, back to the main frame, of the auxiliary frame and / or the side face of the auxiliary frame and used for being connected with a cast-in-place concrete wall. The window opening size precision control effect is effectively improved, the water seepage probability of the window frame is reduced, the heat preservation and heat insulation effects are achieved through the heat preservation layer, and the energy-saving effect of the high-precision disassembly-free self-heat-preservation mold frame device is further improved. Meanwhile, the overall structural strength is improved, the requirements for bearing and reliable connection of the main frame are effectively met, and the installation precision is further improved.

The invention discloses a parapet inner wall wallboard structure and a construction method thereof.The parapet inner wall wallboard structure comprises a composite base plate, a connecting layer and a flashing cover plate, the composite base plate comprises a heat preservation layer and a hydrophobic protection layer covering the outer side surface of the heat preservation layer, and the connecting layer is attached to the inner side and the bottom surface of the heat preservation layer; the flashing cover plate is used for being pasted to the root portion and the inner wall portion of the parapet wall and covers the top of the composite base plate, the flashing cover plate comprises a first extending end and a second extending end, the first extending end extends towards the inner side of the parapet wall and is provided with a fixing structure matched with a parapet wall pre-embedded mounting groove, and the first extending end covers the waterproof layer closing-in portion of the parapet wall in a pressing mode. And the second extending end is bent and extends downwards, and is pressed and attached to the outer surface of the hydrophobic protective layer, so that the technical problems that in the prior art, a parapet inner wall heat preservation waterproof structure is multiple in layer, complex in construction step and low in efficiency are solved.

The utility model provides an ultralow-energy-consumption building external window airtight structure which comprises a structure base layer, an external window and an energy-saving auxiliary frame. The energy-saving auxiliary frame is pre-buried at the edge, connected with the outer window, of the structure base layer, and the energy-saving auxiliary frame transversely crosses the indoor side and the outdoor side of the outer window; the outer window is detachably connected to the energy-saving auxiliary frame; the waterproof vapor-proof film is laid on the joint face of the indoor side of the energy-saving auxiliary frame and the structural base layer. The waterproof vapor-permeable film is laid on the joint surface of the outdoor side of the energy-saving auxiliary frame and the structural base layer; the closing-up positions of the waterproof vapor-proof film and the waterproof vapor-permeable film are coated with silicone sealants. The air tightness of the outer window is guaranteed, indoor and outdoor cold and hot air exchange and cold and hot energy loss are reduced, and the energy-saving and emission-reducing effects of a building are achieved; the building sound insulation performance and the air quality are improved, the energy use efficiency is improved, meanwhile, water vapor is discharged outdoors in time, the energy-saving auxiliary frame of the outer window is protected against corrosion, the service life of the outer window and the building is prolonged, and an effective guarantee is provided for long-term use of the building.

The utility model relates to an energy-saving window convenient to ventilate, and relates to the technical field of constructional engineering. The energy-saving window is arranged on a wall and comprises a fresh air system, a glass assembly, a window sash sectional material, a window frame sectional material, a window sill sectional material and a steel corner connector, and a draught fan in the fresh air system can achieve indoor and outdoor air circulation through indoor and outdoor pressure intensity; in cold winter or hot summer, indoor and outdoor ventilation can be carried out without opening a window, so that the loss of indoor heat is reduced on the premise of ensuring the freshness of indoor air; and according to a filter screen and pinhole-shaped through holes arranged in the fresh air system, the circulating air can be filtered, and the softness of the air flowing into a room is ensured, so that the indoor comfort is improved.

The utility model provides a frame sash structure of an ultra-low-energy-consumption aluminum-plastic composite door and window, which belongs to the technical field of doors and windows and comprises heat preservation glass, a first outer frame, a second outer frame, a plurality of first composite adhesive tapes, a plurality of second composite adhesive tapes, a pressing line, a plastic profile and a frame profile. The outer side of the heat preservation glass is fixedly connected with the upper end of a first outer frame through the first composite adhesive tape, the lower end of the first outer frame is fixedly connected with the upper end of a second outer frame through the first composite adhesive tape, and the inner side of the heat preservation glass is fixedly connected with the pressing line through the first composite adhesive tape. The lower end of the pressing line is connected with the upper end of the frame profile in a sliding installation mode, and the lower end of the frame profile is fixedly connected with the plastic profile through the first composite rubber strip. The aluminum-plastic composite door and window can solve the problem that an existing aluminum-plastic composite door and window is prone to falling off due to the fact that the connecting position is affected by thermal expansion and cold contraction.

The present disclosure provides novel low density open cell polyurethane (PUR) foams that can be prepared using a combination of precursors and conditions, such as an off-ratio A-side:B-side volume ratio (v:v) that includes a higher A-side volume than B-side volume, an aromatic polyisocyanate component having an isocyanate functionality of about 2.5 to about 3.0, and an isocyanate index of about 20 percent to about 40 percent. Using the processes and precursors disclosed herein, PUR foams with a density of about 0.25 lb / ft 3 ~approx. 0.45 lb / ft 3 A polyurethane foam having a density of

The invention relates to a heat preservation construction method for a space double-curved-surface shell structure. The heat preservation construction method is suitable for complex three-dimensional curved-surface structures such as snowmobile and sleigh racing tracks. The method adopts a composite process of mainly spraying polyurethane and assisting local polyurethane plates, and comprises the following steps: firstly, pre-installing polyurethane plates in corner angle areas such as a special-shaped support and a cornice, and then carrying out multi-layer polyurethane on-site spraying on double-curved-surface shell subareas of space at the back and the bottom of a racing track, with the thickness of each layer being less than or equal to 20mm; in the spraying process, the thickness is measured in real time through a probe and dynamically adjusted till the total thickness reaches the design value and the error is smaller than or equal to + / -10 mm; and finally, trimming and cutting the surface and edges and corners, leveling and constructing a protective layer. According to the method, the thermal insulation layer which is integrally continuous, free of cold seams, accurate in thickness and clear in local corner angle is formed at a time, the problems that a complex curved-surface thermal insulation layer cannot be spliced and cannot be measured accurately, and a cold bridge exists are thoroughly solved, refrigeration energy consumption is remarkably reduced, the ice surface quality is improved, and the method is successfully applied to the snowmobile sleigh center of Beijing winter America.