49results about How to "Does not affect strength" patented technology

The invention discloses a preparation method of a high-temperature excitation coil based on an AMB process, and relates to the technical field of magnetic levitation, and the preparation method specifically comprises the following steps: S1, silicon nitride ceramic is perforated; s2, through hole filling and surface screen printing; s3, carrying out vacuum sintering on the metal foil and the silicon nitride ceramic; s4, performing coil patterning and surface treatment; s5, preparing a single-layer silicon nitride ceramic metal coil; s6, preparing a ceramic isolation sheet; s7, performing lamination and vacuum sintering; the magnet exciting coil prepared by the invention has relatively good reliability and long service life in a service environment of 550-600 DEG C.

The utility model discloses a connecting node structure of a steel column and a structural floor. The joint structure comprises a steel column, a concrete short column, a concrete bracket, equilateral angle steel and a structural terrace plate, a steel column is embedded into a foundation, a concrete short column wraps the steel column to the elevation of a terrace, a concrete bracket is additionally arranged on the periphery of the concrete short column, a structural terrace plate is connected to the concrete bracket, structural terrace plate steel bars are connected with equilateral angle steel welded to the steel column in advance through single-face welding, and the structural terrace plate, the concrete bracket and the concrete short column are integrally poured. And finally, a stable and reliable-sealing connection node is formed. According to the utility model, the construction is simple, the equilateral angle steel pre-welded on the steel column does not influence the strength and construction of the steel column, the connection is effective and reliable, the terrace reinforcing steel bar is welded on the equilateral angle steel, and the bracket reinforcing steel bar is connected with the concrete short column and the terrace reinforcing steel bar, so that the overall stability and safety of the connection of the terrace and the column are ensured, namely the generation of cracks is effectively reduced; and a good waterproof effect is achieved, permeation of underground water can be effectively prevented, and then normal production in a plant is guaranteed.

The utility model provides a passenger car body structure and a public bus, and belongs to the technical field of public buses, the passenger car body structure comprises a front wall framework, a rear wall framework, a left side coaming, a right side coaming, a top cover, a front wall skin, a rear wall upper skin and a rear wall headlamp skin. The left side coaming, the right side coaming and the top cover are all carbon fiber composite boards. The front wall skin, the rear wall upper skin and the rear wall headlamp skin are all carbon fiber composite boards. The steel skins fixed on the front wall framework and the rear wall framework are replaced by the carbon fiber composite plates, so that compared with carbon fiber composite materials only used in the left side coaming, the right side coaming and the top cover, the weight of the body of the passenger car or the coach can be further reduced, the strength and the rigidity of the body are not affected, and meanwhile, the weight of the passenger car or the coach can be reduced. And the lightweight degree of the whole vehicle can be further improved.

This invention provides a system for monitoring and removing scale from the inner wall of HVAC water pipes, belonging to the technical field of HVAC systems. It includes HVAC water pipes, with an auxiliary removal component installed on the outer wall of the pipes to use ultrasonic vibrations to peel scale off the inner wall. In use, the auxiliary removal component allows the ultrasonic transducer to receive a high-frequency electrical signal from an ultrasonic generator, generating high-frequency mechanical vibrations. These vibrations propagate rapidly along the wall of the HVAC water pipe and are transmitted to the water inside and the scale adhering to the inner wall. Under the action of the high-frequency ultrasonic vibrations, the scale gradually peels off the inner wall, achieving the purpose of scale removal without causing significant mechanical impact or damage to the HVAC water pipe itself. Long-term use will not affect the strength and sealing of the HVAC water pipes, ensuring their safe and stable operation.

The present invention is a construction method and a construction support structure for a building structure in a collision area with a pipeline to be removed. The method includes: disconnecting the building structure from the collision area of ​​the pipeline to be removed, forming an upper structure above the collision area, forming a lower structure below the collision area, leaving lower column steel bars extending to the collision area in the lower structure, leaving upper column steel bars extending to the collision area in the upper structure, setting a support structure extending to the upper structure and avoiding the pipeline to be removed from the lower structure upward, and performing casting construction of the upper structure and the lower structure; after removing the pipeline to be removed, connecting the lower column steel bars and the upper column steel bars, and casting construction of the support structure, the upper column steel bars and the lower column steel bars in the collision area. The present invention can enable the building structure to meet the construction period requirements without affecting its integrity and strength under the premise of temporarily postponing the removal of the pipeline to be removed.

The utility model discloses a mounting structure of a driving device and a cooking utensil, the mounting structure comprises a cover plate, the cover plate is provided with a backflow hole and an air hole which are vertically through, and the connecting line of the projection of the center of the backflow hole on the horizontal plane along the vertical direction and the projection of the center of the air hole on the horizontal plane along the vertical direction is not overlapped with or parallel to the projection of a first direction on the horizontal plane; the backflow assembly is vertically and movably arranged on the backflow hole; the gravity ball is transversely and movably arranged on the air hole in the first direction; the reinforcing frame is arranged on the cover plate and extends in the first direction; the driving device is transversely and movably arranged in the reinforcing frame in the first direction and extends in the first direction, the driving device comprises a first push rod and a second push rod, the first push rod corresponds to the backflow assembly and extends in the first direction, the first push rod is connected to the top of the backflow assembly, and the second push rod corresponds to the gravity ball and extends in the first direction; the second push rod is located on the side of the gravity ball in the first direction. The driving device can accurately drive to open and close the backflow hole and the air hole.

This utility model discloses a spiral-grooved vibration-damping tapered shank cutting tool, relating to the technical field of BT-type tapered shank cutting tools. Specifically, it is a spiral-grooved vibration-damping tapered shank cutting tool, comprising a flange and a BT-type tapered shank. The surface of the BT-type tapered shank is provided with spiral grooves, which are filled with elastic damping material. This spiral-grooved vibration-damping tapered shank cutting tool, by designing spiral grooves in the BT-type tapered shank and filling them with elastic damping material, utilizes the multi-head spiral structure of the spiral grooves to disperse vibration energy in multiple directions. At the same time, the elastic damping material absorbs high-frequency vibrations through shear deformation. This "rigid-flexible composite" structural design solves the contradiction between vibration suppression and structural strength in BT-type tapered shank cutting tools, and also provides high structural reliability without affecting the original strength of the BT-type tapered shank. It offers a BT-type tapered shank cutting tool that combines high rigidity, good vibration reduction performance, and low manufacturing cost.

The utility model discloses an insect-proof type light all-bamboo composite board which comprises a board body, the board body is composed of a face board, an insect-proof board and a base board, and the insect-proof board is arranged between the face board and the base board. The first connecting block is fixed to the left end of the plate body, a fixing strip is arranged on the lower end face of the first connecting block, a second connecting block is fixed to the right end of the plate body, and a limiting groove is formed in the upper end face of the second connecting block. According to the insect-proof type light all-bamboo composite board, the insect-proof board can be closer to the ground where a floor is laid, then the insect-proof effect is improved, the integrity and strength of the composite board are not affected, and the effect of prolonging the service life of the composite board is achieved.

The present invention relates to a high temperature wear resistant dry brake friction plate material and a preparation method thereof, belonging to the technical field of alloy friction materials. The material strengthens the iron-copper alloy matrix by precisely controlling the addition amount of Mo and Y2O3; adds a high entropy alloy strengthening phase (Al‑Cr‑Fe‑Ni‑Ti) to the iron-copper alloy to improve the wear resistance; adopts a composite lubricating phase (CaF2+BaF2+Ag), and adjusts its ratio so that CaF2‑BaF2 weakens the two-body wear effect and Ag weakens the three-body wear effect, thereby achieving the improvement of lubrication performance under high temperature and room temperature conditions; adds a high entropy alloy strengthening phase (Al‑Cr‑Fe‑Ni‑Ti) and a composite lubricating phase (CaF2+BaF2+Ag) at the same time, and adjusts its ratio so that (CaF2+BaF2+Ag) weakens the adhesive wear effect and (CaF2+BaF2+Ag) weakens the abrasive wear effect, thereby reducing the friction coefficient and wear rate.

The invention provides a high-strength complex-section cavity product cutting device which comprises a height adjusting mechanism, a radian adjusting mechanism, a follow-up mechanism and a cutting unit which are sequentially arranged from bottom to top. The cutting-off unit comprises a vertical cutting-off mechanism used for cutting off material belts on the two sides of the cavity product and a horizontal cutting-off mechanism used for cutting off a reinforcing rib structure in the middle of the cavity product. The invention further provides a cutting-off method which comprises the following steps: pre-punching and cutting off a process hole in advance in a material belt before rolling forming, and integrally cutting off a cavity product by adopting a regional secondary cutting-off mode after rolling forming. Follow-up continuous cutting of high-strength complex section type cavity products can be achieved on a rolling line, the cutting efficiency is high, the quality is good, the product rework rate is greatly reduced, and the service life of a cutter is remarkably prolonged; the device is flexible to use and high in universality, and can be adapted to cold-bending profiles with various different section types through replacement of the standard cutting head.

The utility model discloses a ball valve limiting mechanism of an RD pressure test valve, which comprises a ball cage, a ball valve arranged in an inner hole of the ball cage, a spherical pit arranged on the surface of the ball valve, a compression screw arranged on the side wall of the ball cage, a spring arranged in an inner hole of the compression screw, one end of the spring connected with the compression screw, and the other end of the spring connected with a steel ball. The steel ball is used for being matched with the spherical pit to limit the ball valve. The steel ball is arranged on the ball cage, and the spherical pit is formed in the ball valve, so that the ball valve can be locked at the opening position after being opened, and the inner hole of the ball body is kept concentric with the inner hole of the tool body, and the problem that the inner hole of the ball body is not concentric with the inner hole of the tool body after the ball valve of the RD pressure test valve is opened in the prior art is solved. The inner hole of the ball valve and the sealing surface of the ball seat are eroded, and the service life of the ball valve is further influenced.

The utility model provides a head cover assembling and positioning structure and a helicopter, which are used for installing a head cover of the helicopter to a rack of the helicopter, and comprise a fixed column fixed on the head cover; the guide piece is fixed on the rack, a guide groove and a fixing hole located in the tail end of the guide groove are formed in the guide piece, and the guide groove is configured to guide the fixing column to enter the fixing hole. According to the hood assembling and positioning structure, the hood and the rack can be assembled more easily, and the risk that the hood cracks is reduced.

The invention provides an experimental device and an experimental method for simulating a water source migration law, the device comprises a water injection assembly, a water pipe assembly, a water-resisting layer simulation structure and a water-bearing layer simulation structure, and the water-bearing layer simulation structure is arranged on the water-resisting layer simulation structure; the aquifer simulation structure comprises a peripheral simulation aquifer and a water injection layer aggregate; the aggregate of the water injection layer adopts stone materials with different particle sizes, and gaps among the stone materials are used for simulating water source distribution in an actual underground aquifer; the aquifer simulation structure is used for simulating an actual underground aquifer; after the water-resisting layer simulation structure is broken, water in the aggregate of the water injection layer leaks and migrates through the water-resisting layer simulation structure so as to simulate the actual water source migration process; according to the experimental device for simulating the water source migration rule, migration characteristics of underground water after a water-bearing layer is broken due to overlying strata movement after coal mining can be simulated, and structural support is provided for coal mine underground reservoir site selection and water source prediction.

The invention belongs to the technical field of circuit boards, and particularly relates to a PCB (Printed Circuit Board), which comprises a glass fiber substrate I, a glass fiber substrate II, a conductive layer, a BGA (Ball Grid Array) bonding pad, a cap via hole, a plug-in connection bridge, a self-locking splicing assembly and a heat dissipation assembly, and is characterized in that the conductive layer is welded at the top of the glass fiber substrate I and the top of the glass fiber substrate II; the surface of the plug-in connection bridge is fixedly connected with the two ends of the glass fiber substrate II, the BGA bonding pad is welded to the middle of the glass fiber substrate I and the middle of the glass fiber substrate II, and the cap via holes are formed in the glass fiber substrate I and the glass fiber substrate II; according to the device, the hook reed is clamped into the glass fiber substrate II and is stably connected with the glass fiber substrate II through the arc-shaped reed which is specially made through telescopic deformation; and after clamping, the non-conductive polyimide strip which is originally positioned in the via hole of the cap and is used for preventing stress fracture of the circuit board is extruded, and the conductive silver-plated copper particle epoxy resin strip is extruded into the via hole, so that electrical connection is formed.

The present invention discloses a prestressed concrete transverse web type support for an electrified railway contact network, comprising ultra-high performance concrete and a plurality of arch frames, wherein the plurality of arch frames are cast in the ultra-high performance concrete from bottom to top, wherein the arch frame comprises two groups of arch structures, wherein the arch structure comprises an annular frame and two V-shaped frames, wherein the two V-shaped frames are respectively fixed at the two ends of the annular frame, and the two V-shaped frames are symmetrical about the center of the annular frame, wherein the two groups of arch structures are arranged in parallel and fixedly connected by a plurality of vertical short bars, and the central axes of the annular frames of the two groups of arch structures are both located on the same vertical line. The present invention improves the overall strength and rigidity of the transverse web type support, and evenly distributes the force, so as to control the occurrence of cracks at the source of the structural design.

The utility model provides a one-way bearing structure which is applied between an input piece and an output piece, the one-way bearing is provided with a plastic mounting seat, a plurality of pin rollers and a metal conduction seat, the plastic mounting seat is provided with a plurality of mounting grooves which are arranged at equal intervals and are through in the radial direction, the pin rollers are accommodated in the opposite mounting grooves, and the metal conduction seat is connected with the pin rollers. And a plurality of conduction inclined surfaces corresponding to the mounting grooves are formed on the peripheral surface of the metal conduction seat corresponding to the plastic mounting seat, so that the rollers on the plastic mounting seat can selectively press the metal conduction seat by utilizing the opposite conduction inclined surfaces to generate a one-way driving effect. Therefore, the weight of the one-way bearing can be reduced by utilizing the plastic mounting seat which can be molded, and the effects of light weight, cost reduction and easiness in processing can be achieved under the condition that the strength of transmission power is not influenced.

The utility model discloses a foldable electric wheelchair which comprises two main frame bodies, the two main frame bodies are symmetrically arranged, the bottoms of the main frame bodies are fixedly connected with bottom supports, the tops of the main frame bodies are fixedly connected with connecting frames, the connecting frames are symmetrically and fixedly connected with two inclined supports, and the centers of the two corresponding inclined supports are rotationally connected. Two connecting rods are symmetrically and fixedly connected to the main frame body, the ends, away from the corresponding connecting frames, of the inclined supports are rotationally connected with the corresponding connecting rods, positioning plates are fixedly connected to the main frame body, holes are formed in the positioning plates and the corresponding inclined supports, and the positioning plates and the corresponding inclined supports are positioned through screws and the holes. The main frame body is rotationally connected with a supporting frame. Through the arrangement, the foldable wheelchair can be folded, so that the width of the wheelchair is reduced, the effect of being convenient to carry and carry is achieved, the structure of the wheelchair body can be effectively reinforced through the folding part of the foldable wheelchair, and the strength of the wheelchair is not affected.

The utility model relates to a building facade keel staggered hole fixing device which effectively solves the problem that the adjustability is poor when keels are installed in a staggered mode. According to the technical scheme, the sliding arm comprises two sets of sliding arm units, each set of sliding arm unit comprises a sliding block and a connecting arm, the sliding block is installed on a keel in a sliding mode, one end of the connecting arm is hinged to the sliding block, and the other end of the connecting arm is provided with a first hinge hole. The first hinge holes in the outer ends of the connecting arms of the two groups of sliding arm units are formed in the same embedded bolt or expansion bolt in a penetrating manner, and the compression nut is screwed at the outer end of the embedded bolt or expansion bolt to compress the end parts of the two connecting arms; the connecting piece can be connected with any bolt position, a long groove does not need to be formed in the keel, the strength of the keel is not affected, punching on site is not needed, installation is convenient, the connecting piece can adapt to an existing keel, and good universality is achieved.

The utility model relates to excavator chassis technical field, and disclose a kind of auxiliary fixing mechanism's excavator chassis, including frame, the both sides front end of frame is rotatably connected with support rod by bearing, and support rod is driven to rotate by servo motor installed on frame, the top and bottom of frame two sides are respectively welded with two first fixed block and second fixed block, the side of first fixed block and second fixed block is all set with fixed hole, the side of support rod is welded with third fixed block, the utility model is cooperated with the use of servo motor and guide component, power component, make screw rod drive fixed rod move to fixed hole, complete the fixing of support rod position, use electrical device to complete the rotation and fixed of support rod, liberate the labor of worker, when adjusting, just need to let worker observe in the safety place far from excavator to complete adjustment operation, improve the security of worker work.

The application provides a double-curing acrylate-epoxy hybrid adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesives. The double-curing acrylate-epoxy hybrid adhesive is composed of component A and component B. The component A comprises tetrahydrofurfuryl methacrylate, isobornyl methacrylate, hydroxypropyl methacrylate, N,N-dimethylaniline, a toughening agent, a double-curing resin, wollastonite, fumed silica, solid glass microbeads, an antioxidant, a phosphate monomer and a multifunctional monomer. The component B comprises benzoyl peroxide, an epoxy resin, wollastonite and fumed silica. The double-curing acrylate-epoxy hybrid adhesive prepared by the application can realize the combination of high-temperature strength and normal-temperature toughness, and solves the problem of easy gelation of a traditional NCO-containing system.

The utility model belongs to the technical field of floors, and discloses a high-strength anti-static floor which comprises a frame, a floor body, connecting pipes, supporting leg assemblies and auxiliary supporting assemblies. Floors are fixedly arranged on the frames; the plurality of supporting leg assemblies are uniformly distributed and arranged to form a plurality of squares; the square support assemblies are jointly, detachably and fixedly provided with a frame. The frame is clamped with the four corresponding support assemblies; every two adjacent supporting leg assemblies are detachably and fixedly connected through a connecting pipe. An auxiliary supporting assembly is detachably and fixedly arranged below each frame. According to the utility model, rapid assembly of the connecting pipe, the supporting leg assembly and the frame is realized, and the working efficiency is improved; the ground is supported and protected through the frame, and the overall strength of the floor is improved; the frame and the floor can be supported in an auxiliary mode through the auxiliary supporting assembly, and the overall strength of the floor is further improved; the auxiliary supporting assembly is connected with the frame in a magnetic attraction mode, and rapid installation and positioning can be achieved.

A safe energy-saving bus duct, comprising a shell, a ground row, a phase row, a bus protection piece, a bus connecting piece, a shell connecting structure; the shell comprises a top plate, a side plate, a bus sheath, a bottom buckle plate; the bus protection piece comprises a protection piece bottom plate, a wing plate, a bus side limiting block, a bus top limiting block, a clamping strip, a flap, a protection piece sleeve; the bus protection piece is inserted into the side plate groove, and the bus clamping strip on one side is clamped into the limiting block at the bottom side of the side plate; the bus connecting piece comprises a connecting bus, a connecting piece bottom plate, a connecting piece limiting block, a positioning rod, a connecting piece sleeve, and the bus connecting piece is arranged between two bus protection pieces; the shell connecting structure comprises an upper cover plate, an upper embedded plate, a lower cover plate, a lower embedded plate, a side guard plate, a side guard plate fastening bolt, and two shell bodies are fixedly connected through the shell connecting structure. The whole structure has high strength, the installation method is simple and rapid, the whole structure has high safety performance, the manufacturing process of parts is simple, and the production cost of the whole structure is low.

The application discloses a steam turbine moving blade root weight-reducing structure, a steam turbine moving blade and a manufacturing method thereof. The steam turbine moving blade root weight-reducing structure comprises a fir-type blade root and a blade root intermediate body connecting a blade body and the fir-type blade root, and a weight-reducing groove is arranged on the inner arc side of the blade root intermediate body. The opening area of the weight-reducing groove accounts for 60%-40% of the area of the inner arc side without the weight-reducing groove. After the assembly of adjacent blades is completed, the contact area of the inner arc side of the blade root intermediate body accounts for 40%-60% of the contact area of the inner arc side of the blade root intermediate body without the weight-reducing groove. The application has the advantages that the average stress level of the blade root area can be effectively reduced, the manufacturing cost of the blade is reduced, the processing difficulty of the blade is not increased, the blade root weight can be reduced, the strength and rigidity of the blade root can be effectively ensured, and the like.

The utility model belongs to the cabinet body protection material technical field, the utility model discloses a cabinet body PVC waterproof and moistureproof board, including board main part, the board main part is the hollow board of integrated molding, and the length direction of hollow hole of board main part is penetrated through board main part, the outside of board main part is covered with aluminium foil, and is provided with waterproof coating between board main part and aluminium foil. Through setting waterproof coating and aluminium foil, make waterproof and moistureproof board have good waterproof and moistureproof effect, can effectively prevent the penetration of water and water vapor, protect the cabinet body from the corrosion of water and water vapor, even acid and alkali environment, thereby improve the waterproof and moistureproof effect and corrosion resistance of cabinet body, thereby improve the use effect and service life of waterproof and moistureproof board.

The utility model discloses a kind of denim of embedded weaving cool feeling antibacterial fiber and clothing, the denim includes: surface layer, it includes functional yarn, functional yarn is as weft and warp yarn interwoven composition;Bottom layer, it includes antibacterial fiber yarn, antibacterial fiber yarn is as weft and the warp yarn interwoven composition, the surface layer and bottom layer jointly constitute directional moisture channel, so that moisture can be oriented by surface layer to bottom layer conduction and diffusion evaporation;The functional yarn is core-sheath inlay composite structure yarn, including: a core layer, by the cool feeling fiber of special-shaped section composition;A sheath layer, it is covered in the outside of the core layer, by natural fiber composition, the natural fiber surface of the sheath layer is attached with antibacterial nanometer material.The utility model constructs directional moisture channel by core-sheath inlay composite structure yarn and antibacterial fiber yarn to realize one-way wetting, and constitute the double-layer level protection of antibacterial function, it has contact bacteriostasis and the double antibacterial function of bottom layer clear bacteria.

The present invention proposes a device and a design method for simulating the mass of water attached to a cabin structure, which belongs to the technical field of ship model testing. The device solves the problem of equivalent simulation of the mass of water attached to a cabin model in tests such as vibration and explosion. The device includes a tire frame, a horizontal spring vibrator and a vertical spring vibrator. The cabin model to be tested is arranged on the tire frame. The horizontal spring vibrators and the vertical spring vibrators are both multiple in number. The multiple horizontal spring vibrators are symmetrically connected on both sides of the cabin model to be tested, and the multiple vertical spring vibrators are symmetrically connected at the bottom of the cabin model to be tested. Each horizontal spring vibrator and vertical spring vibrator includes a spring and an equivalent additional mass block. One end of the spring is connected to the equivalent additional mass block, and the other end is connected to the cabin model to be tested. It is mainly used to simulate the mass of water attached to a cabin structure.

The utility model discloses a high-strength steel structure wallboard which comprises a steel structure framework and a plurality of metal panels arranged on the outer side of the steel structure framework, and the steel structure framework comprises an upper cross beam, a lower cross beam and a plurality of vertical beams arranged between the upper cross beam and the lower cross beam. The upper end of each vertical beam is fixedly connected with the upper cross beam, and the lower end of each vertical beam is fixedly connected with the lower cross beam; each vertical beam comprises a plurality of sections of vertical beam units, and every two adjacent sections of vertical beam units are in butt joint in an end-to-end mode and are fixedly connected through a metal connecting piece. According to the steel structure wallboard, the steel structure framework and the metal panel are fixed together, so that the strength of the wallboard is improved, the wallboard is convenient to position and fix, it is guaranteed that the steel structure wallboard cannot shake when a worker fixedly installs the steel structure wallboard, the working efficiency of the worker for installing two steel structure wallboards is improved, and the labor intensity of the worker is reduced. The suspension time of the steel structure wallboard is shortened, and the safety of workers is guaranteed.

The invention discloses a water pump stator and shell automatic mounting device which comprises a mounting equipment table, a circular track and a first clamp, the circular track is arranged on the upper surface of the mounting equipment table, a driving gear is arranged on the left side of the middle of the circular track, a driven gear is arranged on the right side of the middle of the circular track, and the driving gear is fixedly connected with the output end of a motor; the driving gear and the driven gear are both connected with the chain in a meshed mode, shells are placed on the multiple shell placing bases, water pump stators are placed on the multiple stator placing bases, and the heating cylindrical workpiece makes contact with the interiors of the multiple shells. The water pump stator and the shell are automatically installed by heating the interior of the shell through heating a cylindrical workpiece and driving clamping of a first clamp, and the strength and toughness of the shell are not affected. And through the design of the circular track, the shell and the water pump stator can be rapidly and stably conveyed.

The fabricated building ventilation wall prefabricated part comprises a wall plate, the wall plate sequentially comprises an inner wall, a heat preservation layer and an outer wall from indoor to outdoor, and a ventilation pipe network is fixedly arranged in the heat preservation layer; a plurality of inner ventilation openings matched with the vertical pipes are formed in the positions, close to the top, of the inner wall so that the ventilation pipe net can be communicated with the indoor space, detachable inner ventilation assemblies are arranged in the inner ventilation openings, and a plurality of outer ventilation openings matched with the vertical pipes are formed in the positions, close to the bottom, of the outer wall so that the ventilation pipe net can be communicated with the outdoor space. A detachable outer ventilation assembly is arranged in the outer ventilation opening; in this way, ventilation is achieved through the ventilation pipe network, and further through modular design between the inner ventilation assembly and the wallboard and between the outer ventilation assembly and the wallboard, the functions of the whole ventilation wall can be designed, adjusted and optimized in a targeted mode according to the environment, and then more intelligent control is carried out in an assisted mode; and indoor and outdoor air circulation is more comfortable, energy-saving and efficient.