908results about "Vertical ducts" patented technology

A trench drain includes a trench, a grating seat and a grating hingedly connected to the trench. The trench has a base wall with peripheral side walls extending upwardly therefrom and an outwardly-extending peripheral flange. The grating seat is configured to receive the grating. The peripheral side walls of the trench have a pair of opposing elongated slots formed therein and the grating has a pair of posts on opposing ends thereof. Each of the pair of posts on the grating are received in a respective one of the pair of opposing elongated slots of the trench to establish an axis of rotation.

The utility model relates to a lighting, heat-insulating and waterproof window well of a building and belongs to the technical field of window wells. Comprising a basement wall and a lighting assembly, window wells are arranged on the basement wall, the lighting assembly comprises lighting windows and suspended ceilings, the lighting windows and the suspended ceilings are located at the tops and the bottoms of the window wells respectively, the window wells comprise the upper window wells and the lower window wells, and the lower window wells are in a horn shape; a waterproof heat preservation assembly is arranged between the window well and the basement wall, a drainage pipe penetrating through the waterproof heat preservation assembly is arranged in the basement wall, the waterproof heat preservation assembly comprises a waterproof roll layer, a cement mortar smearing layer and a graphite polystyrene board, and the cement mortar smearing layer and the graphite polystyrene board conduct heat preservation on the window well. According to the building daylighting heat-preservation waterproof window well, the daylighting efficiency and uniformity are improved through the design of the outwards-convex-pyramid-shaped daylighting window and the horn-shaped lower window well, the waterproof heat-preservation assembly is combined with the graphite polystyrene board, heat transfer is effectively prevented, the heat-preservation performance is enhanced, and meanwhile the waterproof effect is improved through the waterproof roll layer and the cement mortar smearing layer.

The utility model relates to the technical field of ventilation pipelines, and discloses a smoke prevention and exhaust air pipe used in a vertical piping shaft, which comprises a smoke prevention and exhaust air pipe body and mounting boxes fixed on the front side and the rear side of the inner wall of the smoke prevention and exhaust air pipe body, and further comprises driving motors fixed at the bottoms of the inner walls of the mounting boxes, a threaded rod is rotationally connected to the upper portion of the inner wall of the mounting box, the bottom end of the threaded rod is fixedly connected with an output shaft of the driving motor, and a lifting block is slidably connected to the upper portion of the inner wall of the mounting box. The air pipe has a cleaning function, the inner wall of the pipeline can be automatically brushed at regular intervals through the built-in automatic cleaning system, the cleaning efficiency is greatly improved, the system shutdown time caused by manual cleaning is shortened through automatic cleaning, continuous and effective operation of a smoke prevention and exhaust system is guaranteed, and the service life of the air pipe is prolonged. Oil dirt and impurities on the inner wall of the pipeline are regularly cleaned, the pipeline can be kept unobstructed, and the smoke exhaust efficiency of the smoke prevention and exhaust system is improved.

The utility model relates to the technical field of underground garage exhaust fans, and particularly discloses a multi-cavity assembly type electromechanical integrated air and smoke exhaust machine room for an underground garage, which comprises a body, an overhaul opening is arranged at the bottom of the body, one side of the overhaul opening is connected with an overhaul door, and one side of the body is provided with a carbon monoxide detector. An indicating lamp is arranged on one side of the body, a connecting frame is arranged at the top of the body, an air inlet is formed in one side of the body, an air inlet cavity is formed in one side of the interior of the body, a fan cavity is formed in the middle of the interior of the body, an air and smoke exhaust fan is arranged in the middle of the fan cavity, an air exhaust cavity is formed in one side of the interior of the body, and an electric cavity is formed in one side of the body. The two ends of the air and smoke exhaust fan are connected with the air inlet cavity and the air exhaust cavity.

The invention belongs to the technical field of added elevators, and discloses a fast-assembly type added elevator steel structure main body and a preparation and assembly method thereof, and the fast-assembly type added elevator steel structure main body comprises a hoistway, a door frame and a corridor. The hoistway is composed of four vertical stand columns and a plurality of transverse beams, the ends of the beams are connected with the connecting faces of the stand columns through connecting pieces, each connecting piece comprises a pair of triangular pieces formed by three steel plates perpendicular to one another, a first plate is connected with the stand columns, a second plate is connected with the beams, and a third plate is an inclined strut reinforcing rib. The door frame comprises door head steel beams between the front stand columns, sill steel beams and landing door stand columns between the sill steel beams, the corridor is connected with the outer sides of the sill steel beams, and through holes in the ends of the edge beams are matched with kidney-shaped holes of the mounting bases to adjust the position. The square pipe joints of the front stand column and the rear stand column are staggered in position. The device is fast to install, stable in structure, convenient to adjust, convenient to overhaul and maintain and suitable for the elevator adding project of the existing building.

The invention relates to an assembly type integrated fire-fighting smoke exhaust fan room structure which comprises a machine room enclosure bulkhead cylinder body which is provided with a bottom plate, a first side wall and a second side wall, the first side wall and the second side wall are connected with the bottom plate and vertically arranged in parallel, and the two ends of the machine room enclosure bulkhead cylinder body in the horizontal direction are provided with a first opening end and a second opening end which are oppositely arranged correspondingly; the end cover side wall is provided with a first end cover and a second end cover which are respectively arranged at the first opening end and the second opening end; smoke suction and exhaust ports are formed in the first end cover and the second end cover and are used for being connected with a ventilation pipeline; the machine room access door is arranged on the first side wall or the second side wall and can be opened and closed; the fan is arranged in an internal space formed by the machine room enclosure bulkhead cylinder body, the first end cover and the second end cover; the machine room enclosure bulkhead cylinder body, the first end cover, the second end cover and the machine room access door are all of a prefabricated concrete structure. The fabricated integrated design is adopted, the cost is low, the self weight is light, fireproof performance is achieved, and the advantages of being stable, reusable, attractive and the like are achieved.

The utility model discloses construction waste turnover equipment for high-rise building construction, which relates to the technical field of high-rise waste turnover and comprises a waste pipeline. Construction waste is put in from the interior of the feeding hopper, the construction waste slides to the supporting plate on the inner wall of the waste pipeline, then the servo motor is started, the supporting plate drives the construction waste at the top end to descend synchronously, and through descending of the supporting plate, huge impact force generated when the construction waste falls from a high layer can be effectively avoided; when a limiting groove in a fixing shaft is embedded into a limiting block, a supporting plate is rotationally and obliquely opened through a circular shaft under the gravity of the construction waste, then the construction waste better falls into a material receiving vehicle from a waste pipeline, and the function of transferring the high-rise construction waste is achieved; and a construction site can be kept clean and orderly, and construction obstacles caused by garbage accumulation are reduced, so that the construction progress is accelerated, and the overall construction efficiency is improved.

The utility model relates to a Fab clean room hot exhaust air recovery processing emergency linkage system, which belongs to the technical field of clean room gas circulation and comprises a fresh air inlet pipe, a fresh air supply outlet, a fan filter unit and an exhaust pipe communicated with the outside of a clean room. The recovery pipe is sequentially provided with a circulating fan capable of pumping away hot exhaust air, a cooling mechanism and an air return pipe, the cooling mechanism is a dry coil cooler or a gas-gas heat exchanger or a cold clean gas mixing type cooler, and the system further comprises an automatic control device. The clean air is conveniently recycled, the burden of supplementing fresh air in a clean room is reduced through the recycled clean air, the operation cost of humidity control of a heating ventilation air conditioner is reduced, the cost of cleaning treatment on air is also reduced, and then the production cost is greatly reduced.

The utility model relates to the technical field of platform household elevators, in particular to a platform household elevator of a modular structure. Comprising a bottom hoistway frame module, a middle hoistway frame module and a top hoistway frame module. The number of the bottom hoistway frame module and the number of the top hoistway frame module are each one. The number of the middle shaft frame modules is set to be larger than or equal to 0 according to the actual elevator running height, and the effects that elevator installation can be rapidly achieved, and therefore the installation efficiency and quality are improved are achieved.

The embodiment of the utility model discloses a prefabricated connecting device for an elevator. The prefabricated connecting device comprises a building body structure, a corridor, an elevator shaft structure and a soft copper cable, the building body structure and the elevator shaft structure are both connected with the corridor; a power circuit is arranged on the outer side of the building structure and used for supplying power to users; the corridor is arranged between the building body structure and the elevator shaft structure and used for connecting channels of different floors; the elevator shaft structure is located on the outer side of the building body structure, vertically extends from the first floor to the top floor and is used as a running channel of an elevator. Path intersection exists between the elevator shaft structure and the power line; the soft copper cable is used for electrical connection at the intersection of the elevator shaft structure and the power line and penetrates through the inner wall of the corridor to be communicated with the power line. According to the embodiment of the utility model, potential safety hazards can be reduced, and the elevator and power lines can be conveniently and independently repaired and maintained.

A modular step that may be composed of a fiber reinforced thermoplastic, metal, or other material. An embodiment of the modular step has a body and two flanges and is configured in size and shape to be detachably affixed to a window well. The modular step mates to the window using a friction fit, mechanical fasteners or tabs / slots. Multiple modular steps can be attached to a single window well. The modular step can be used to facilitate egress through a window well and improves the visual aesthetics of a window well. Another embodiment of the modular step includes a body and a plurality of flanges and is configured in size and shape to be detachably affixed to a window well, wherein the modular step includes one and only one rung, with the plurality of flanges including two and only two flanges on either side of the rung.

The utility model discloses a tube well pipeline assembly type installation structure which comprises a plurality of tube well pipeline assembly units which are sequentially spliced in the vertical direction, and each tube well pipeline assembly unit comprises a supporting plate, a plurality of sleeves arranged on the supporting plate, a pipeline arranged in the sleeves, a pipe joint arranged at the end of the pipeline and a support fixedly arranged on the outer side of the pipeline. The support is fixedly connected with a building wall through a fastener. The tube well is assembled in a prefabricated manufacturing and on-site mounting mode, and is poured synchronously with a building main body, so that the construction period is short, the construction cost is reduced, the structural stability is high, the construction operation is convenient, and the practicability is high.

A drain assembly comprises a shroud, a shank, and a frame. The drain assembly may further comprise a shim with an angled top surface. The frame may have an angled bottom surface. A rotational orientation of the angled top surface of the shim relative to the shank and a rotational orientation of the angled bottom surface of the frame relative to the shank may be independently adjustable, thereby allowing for the top surface of the frame to be both angularly and rotationally adjusted relative to a central axis of the drain assembly independent of the positional height of the shank. The drain assembly may further comprise a cover having bendable tabs. The bendable tabs may be disposed around a periphery of the cover and may be configured to contact an angled inner surface of an upper bowl of the shroud, such that the bendable tabs bend around the frame, thereby locking the cover onto the frame.

This invention relates to the field of deep foundation pit support construction technology, specifically a nested support construction process for deep foundation pit elevator shafts and sump pits. It solves the problem that traditional caisson waterproofing technology is prone to failure due to pit wall collapse in highly permeable gravel strata, making it difficult to create stable construction conditions. The process includes a steel caisson support structure, within which a steel caisson waterproofing structure is nested. This steel caisson waterproofing structure is used in conjunction with the steel caisson support structure for nested construction. This invention, through the nested cooperation of the steel caisson support structure and the steel caisson waterproofing structure, and the injection of a self-compacting concrete filling layer, achieves an integrated support and waterproofing effect during construction. It creates a stable, dry, and enclosed working space in easily collapsible, highly permeable strata, solving the problem of failure of traditional single waterproofing technology and creating safe and reliable conditions for subsequent structural construction.

The utility model relates to the technical field of elevator derricks, in particular to an inward bending steel structure derrick for installing an elevator, which comprises a base, a derrick I and a plurality of derricks II, the derrick I is fixedly arranged at the top of the base, and the plurality of derricks II are fixedly arranged at the top of the derrick I in sequence. A plurality of stand columns and cross beams are arranged in the base, the first derrick and the second derrick, four stand columns distributed in a rectangular shape are arranged in the base, the first derrick and the second derrick, and the cross beams are connected between every two adjacent stand columns through bolts. The stand column is formed by inwards folding a steel plate to form a first bending piece and a second bending piece, the end, away from the second bending piece, of the first bending piece is inwards folded to form a third bending piece, and the end, away from the first bending piece, of the third bending piece is inwards folded to form a first bending connecting piece. According to the utility model, the problems of single structure, insufficient performance and stress concentration of connecting nodes of an elevator derrick upright post additionally arranged in an old community are solved, and the overall strength, stability and safety of the derrick are improved.

The utility model discloses a socket-and-spigot joint device for connecting an upper flue and a lower flue. The socket-and-spigot joint device comprises a socket-and-spigot sleeve and a bearing piece, wherein the socket-and-spigot sleeve is used for connecting the upper flue and the lower flue and is of a ladder section type structure; the bearing piece is fixed on a floor above the lower flue and is used for positioning the downward inserting position of the socket-and-spigot sleeve; the socket sleeve comprises an upper bearing section which is connected with an upper-layer flue and has a net size larger than the size of the flue, a lower inserting section which is connected with a lower-layer flue and has a net size smaller than the size of the flue, and a flue connecting section which is connected between the upper bearing section and the lower inserting section and has a net size the same as the size of the flue; the bearing piece is arranged on the outer side of the lower inserting section in a sleeving mode and fixed to the bottom of the flue connecting section. The socket and spigot joint device for connecting the upper flue and the lower flue has the advantages of being convenient to construct, high in safety, low in cost and high in construction quality.

The protection structure comprises a main body and a shielding assembly, a first air inlet is formed in the top wall of the main body, the shielding assembly comprises a cover plate and a supporting piece, the cover plate is supported above the top wall through the supporting piece and is provided with a second air inlet staggered with the first air inlet, and the first air inlet is communicated with the second air inlet. And a drainage mechanism is further arranged on the main body, specifically, a drainage ditch surrounding the periphery of the first air inlet is arranged, falling rainwater is shielded by the cover plate, rainwater falling from the second air inlet is collected into the drainage ditch on the upper side of the top wall to be drained, it is avoided that the rainwater falls into the well through the first air inlet, and the rainproof effect of protecting equipment in the well is achieved.

A passenger elevator, in particular, a passenger elevator, comprises a car, an inner frame, and an outer frame, wherein the outer frame encloses an elevator shaft and comprises a base plate, a first lateral surface, a second lateral surface lying opposite the first lateral surface, a third lateral surface, and a fourth lateral surface lying opposite the third lateral surface, wherein the inner frame comprises at least one first guide post and a second guide post lying opposite the first guide post, characterized in that the inner frame supports the weight of the car.

The utility model relates to the technical field of building construction garbage cleaning devices, in particular to a rotatable garbage chute channel which comprises a supporting structure, a chute channel body and a rotating structure, the supporting structure is formed by building scaffold steel pipes, and the height of the supporting structure can be adjusted according to actual conditions; the sliding groove channel is formed by splicing wood plates, the size of a single wood plate is 1.5 m * 0.8 m, and the wood plates and the scaffold steel pipes are bundled and fixed through steel wires. The rotating structure comprises angle iron and a bearing, the angle iron is cut into a proper length and then manufactured into a rotatable support, the bearing is installed on the rotating portion of the rotatable support, the bearing is connected with a discharging port, and the discharging port is formed above the temporary garbage pool. The building construction efficiency is improved, the construction cost is reduced, and the construction environment quality is improved.

This invention discloses an installation fixture for aluminum alloy wellbore systems, comprising four positioning fixtures respectively clamped and fixed to columns. Each positioning fixture also has two clamping ends, each clamped and fixed to two adjacent crossbeams. A connecting assembly is provided between adjacent positioning fixtures, a measuring assembly for measuring the distance between adjacent positioning fixtures is provided between adjacent positioning fixtures, and a position adjusting assembly for adjusting the position of the positioning fixtures is provided between the multiple positioning fixtures. This invention uses positioning fixtures to connect to the columns and crossbeams respectively, and adjusts the distance between adjacent fixtures through the connecting assembly to ensure that the distance between adjacent columns is consistent, thereby ensuring the fit between each crossbeam and column and avoiding large splicing seams between the crossbeams and columns that would affect stability. Simultaneously, the position adjusting assembly ensures that the center distance between the four columns and the position adjusting assembly is consistent, guaranteeing the strength and stability of the entire wellbore.

The invention belongs to the technical field of building equipment, and particularly relates to an elevator shaft secondary structure concrete pouring tool which comprises a supporting part, a height adjusting part, a placing part, a pouring funnel and a flow guide pipe, the supporting part is detachably installed on the inner wall of a shaft, the height adjusting part is detachably connected with the supporting part, and the placing part is detachably connected with the height adjusting part; the pouring funnel is installed on the supporting part, one end of the flow guide pipe is connected with the bottom end of the pouring funnel, and the other end of the flow guide pipe is placed in the placing part; after being detached, the tool is small in size and convenient to transfer, so that the labor capacity of carrying parts is reduced, the physical output of constructors is remarkably reduced, and the working environment of high-altitude operation is improved; all parts of the tool are detachably connected, the pouring requirements of secondary structures of different floors and different positions are met, and special tools do not need to be customized for specific scenes; and after construction is completed, parts can be cleaned and recycled, repeated use is achieved, waste of consumables is reduced, and the construction cost is reduced.

The invention discloses an external elevator frame structure of an existing building, which comprises a concrete foundation pit and a steel structure main body, each structural column on the wall side of the steel structure main body is connected with a bearing wall of the existing building through a connecting unit, and the connecting unit comprises a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece; the two first connecting pieces penetrate through a bearing wall of an existing building, the outdoor ends of the first connecting pieces are fixedly connected with the structural columns through the second connecting pieces, and the indoor ends of the two first connecting pieces are welded through the third connecting pieces. Each end part of the two fourth connecting pieces is connected through at least two long screw rods; and the fourth connecting piece is welded with the two first connecting pieces. The steel structure body is externally hung on the building through the connecting units, the steel structure body and the building are tied to form an organic whole, the problem that displacement deformation between an existing additional elevator steel structure and the building body is large under the wind load effect is solved, and the problem that an elevator car cannot fall to an elevator foundation pit due to the displacement deformation is further solved.

The utility model discloses an anti-corrosion garbage pipeline baffle device, and relates to the technical field of garbage pipelines. Comprising a mounting pipe frame, a sliding groove is formed in the inner wall of the mounting pipe frame, and a blocking assembly is arranged on the inner wall of the sliding groove. At the moment, the multiple compression springs extend to push the two ethylene propylene rubber plates to move, so that the protruding end of the right ethylene propylene rubber plate abuts against the inner wall of a sealing groove formed in the side wall of the left ethylene propylene rubber plate, and therefore the inner wall of the mounting pipe frame is blocked; secondly, when the two ethylene propylene rubber plates abut against each other, the fluororubber disc is pulled through an oil rope, so that the surface of the fluororubber disc tightly abuts against a conical arc edge formed in the top face of the mounting pipe frame, and the probability that the fluororubber disc is corroded by acid-base components in the garbage pipeline through the two ethylene propylene rubber plates is reduced; and therefore, harmful gas in the garbage pipeline is prevented from polluting air through the fluororubber disc.

The invention relates to the technical field of building construction, in particular to a kitchen flue hole-lifting-free integrated construction method which comprises the following steps: S1, optimizing a flue hole; s2, the flue formwork is reinforced; s3, concrete pouring; s4, a flue is installed; s5, node sealing treatment is carried out; and S6, performing a closed water test. According to the method, the size of the reserved flue hole is optimized to be matched with the inner overall size of the finished flue, the finished flue can be directly placed on a building structure floor when being installed, and compared with traditional hole hanging method construction, the construction step of filling the fit clearance between the finished flue and the reserved flue hole with concrete is omitted, the construction efficiency is improved, and the construction cost is reduced. Therefore, the forming quality of concrete at the butt joint part of the reserved flue hole and the finished flue is higher, and the risk of leakage of a building floor is reduced.

The utility model discloses an assembly type pipe sealing structure of an indoor pipeline, which comprises a C-shaped steel groove fixedly arranged on the ground, a cement pressure plate, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe, a water outlet pipe, a water outlet pipe and a water outlet pipe, wherein one end of the C-shaped steel groove is propped against a civil engineering wall body and the bottom of the cement pressure plate is inserted into a top opening of the C-shaped steel groove; the bottom of the base plate is placed on the C-shaped steel groove; the veneer is fixedly installed on the C-shaped steel groove, and the side wall of the C-shaped steel groove makes contact with the back face of the veneer; wherein a plurality of supporting blocks which are arranged along a straight line are arranged on the civil engineering wall body, and one side of each supporting block is in contact with the surface of the cement pressure plate. Compared with the prior art, the problems that an existing pipeline wrapping and building technology is complex, and efficiency is low are solved.

The invention provides a connecting structure for adjacent components of an assembly type external elevator shaft. The connecting structure aims at improving the connecting strength and the mounting efficiency. The structure comprises a vertically-arranged first component and a horizontally-arranged second component, cavities are formed in the first component and the second component, and four connecting through holes and a shear-resistant through hole are formed in the corresponding positions of the first component and the second component respectively. A nut of the connecting assembly is welded to the inner wall of a cavity of the first component, and a bolt penetrates through connecting through holes of the two components and is matched with the nut. The anti-shearing assembly comprises an anti-shearing sleeve, a sealing plate, a bolt and a nut, and the sealing plate is welded to the inner wall of the cavity of the first component. The shear-resistant sleeve is matched with the shear-resistant through holes of the two components and abuts against the sealing plate after penetrating through the shear-resistant through holes, and an inner hole of the shear-resistant sleeve only allows a shear-resistant bolt screw to pass through. And the anti-shearing bolt penetrates through the inner hole of the sleeve and the anti-shearing through hole of the sealing plate and is matched with the nut. According to the structure, through reasonable design of the connecting and anti-shearing assemblies, the connecting strength and the anti-shearing capacity between the components are remarkably enhanced, meanwhile, the installation process is simplified, the construction efficiency is improved, and the construction cost is reduced.

The vertical shaft derrick plastic energy dissipation protection beam structure disclosed by the application comprises a plastic energy dissipation component, a support component is fixed to the upper side of the plastic energy dissipation component through a plurality of bolts, a soft steel energy dissipation support is fixed to the two sides of the support component, the other sides of the two soft steel energy dissipation supports are fixed to steel columns, a plurality of buffer supports are further arranged, the buffer supports are fixed to the lower side of a steel beam, the steel beam is arranged above the support component, and the buffer supports correspond to the support component. The energy dissipation protection beam has the advantages of simple structure, convenient installation, wide application in the technical field of impact resistance protection in civil engineering and mechanical engineering, effective absorption and dissipation of impact energy, cooperation of multiple dissipation components and protection components, greatly improved energy dissipation capacity of the protection component, easy installation and replacement of the plastic energy dissipation components, low cost, and high protection efficiency.

The utility model relates to the field of elevator hoistways, in particular to a villa elevator hoistway stand column and cross beam structure which comprises a stand column body and a cross beam body matched with the stand column body, the stand column body is made of steel, and the corners of the stand column body are concaved inwards to form grooves where glass corners are embedded. The groove extends in the length direction of the stand column body, and the cross beam body comprises a bearing part and a positioning part which are matched with the groove and used for bearing the side edge of glass. The vertical column beam has the effects of improving the strength of the vertical column beam, facilitating installation and reducing the machining cost.

The utility model relates to the field of building construction, in particular to a building waste vertical transportation channel for house building construction, which comprises a waste channel, a connecting channel, a spraying assembly, a feeding assembly, a buffering assembly and a collecting assembly, a first connecting channel is arranged below the first garbage channel, a second garbage channel is arranged below the first connecting channel, a second connecting channel is arranged below the second garbage channel, a third connecting channel is arranged below the second connecting channel, and a feeding assembly is arranged on the outer side of the first garbage channel and the outer side of the second garbage channel. A first spraying assembly is arranged on one side of the feeding assembly, buffering assemblies are arranged on the inner sides of the first connecting channel, the second connecting channel and the third connecting channel, a collecting assembly is arranged below the third connecting channel, and a second spraying assembly is arranged above the collecting assembly; the dust removal device can solve the problems that dust seriously abrades equipment, and the equipment is damaged due to the fact that the equipment is heated due to long-time operation.

The utility model belongs to the technical field of cavity floor system application, and particularly discloses an air exhaust and smoke exhaust integrated assembly type cavity floor system. Comprising a head end assembly type cavity floor system, a plurality of middle assembly type cavity floor systems, a tail end assembly type cavity floor system, a lower through groove, a first transverse through groove, a second transverse through groove, a third through groove, a fourth transverse through groove, a fifth through groove, a first air guide pipe, a second air guide pipe, an external air guide pipe and the like. The air exhaust and smoke exhaust integrated assembly type cavity floor system has the advantages that the function of the assembly type cavity floor system is expanded, a traditional air exhaust and smoke exhaust pipeline is replaced, on one hand, the construction period is shortened, and on the other hand, the building construction cost is correspondingly reduced; and 2, a plurality of first inclined baffles, a plurality of second inclined baffles and a plurality of third inclined baffles which are respectively matched with the first gas guide pipe, the second gas guide pipe and the external gas guide pipe for use play a role in preventing the flue gas from flowing backwards.