35 results about "Accessory structure" patented technology

This application discloses a reverse construction process for cast-in-place overpass pile and column integrated casting, belonging to the technical field of overpass construction. It includes the following steps: S1, road maintenance; S2, integrated pile and column casting; S3, abutment and cap beam construction; S4, box girder casting using the ground formwork method; S5, ancillary structure construction; S6, earthwork excavation and pier finishing; S7, tie beam construction. This application, by adopting a reverse construction process of "maintaining road access first, then constructing the structure, and finally excavating," overturns the traditional forward construction logic, ensuring uninterrupted access to existing roads and eliminating the need for detours during construction, significantly reducing social conflicts. Integrated pile and column casting creates a seamless, integral structure between the pile foundation and pier, improving structural integrity and load-bearing capacity. The ground formwork method for casting box girders eliminates the need for full-span scaffolding, avoiding the safety risks of high-scaffolding construction. Simultaneous layered earthwork excavation and pier finishing avoids high-altitude scaffolding work, significantly reducing construction safety risks.

The utility model belongs to the field of concrete pouring molds, and particularly relates to an assembly type bridge deck system prefabricating mold for a high-speed railway. Comprising a bottom formwork, a side formwork, a side wall outer formwork, a side wall inner formwork, a vertical wall first formwork, a vertical wall second formwork, a protective wall inner formwork and a protective wall outer formwork. The side wall outer formwork and the side wall inner formwork are connected between the two side formworks to define a side wall formwork cavity. The first vertical wall formwork and the second vertical wall formwork are connected between the two side formworks to define a vertical wall formwork cavity. The protection wall inner formwork and the protection wall outer formwork are connected between the two side formworks to define a protection wall formwork cavity. The bottom formwork is connected between the two side formworks to seal the bottoms of the side wall formwork cavity, the vertical wall formwork cavity and the protective wall formwork cavity, and the bottom formwork, the side wall inner formwork, the first vertical wall formwork, the second vertical wall formwork and the protective wall inner formwork are arranged at intervals to form a bottom plate formwork cavity. The problems that bridge deck accessory structures such as protective walls, vertical walls and side walls of a traditional bridge deck system are multiple in installation procedure and large in number of used formworks are effectively solved.

The invention relates to a construction method for dismantling and newly building a continuous beam. Comprising the steps that accessory structures of an existing beam body are dismantled; a newly-built support is arranged at the 0 # block position of the existing beam body in the longitudinal bridge direction, and the newly-built support is rigidly connected to the bottom of the existing beam body; the existing support is flexibly connected with the bottom of the existing beam body; an anti-collision guardrail and a flange plate are dismantled under the bridge through dismantling equipment; the existing beam body is dismantled under the bridge through dismantling equipment, and dismantling is conducted from the two ends of the existing beam body to the 0 # block at the same time till the existing beam body is completely dismantled; and a newly-built bridge is constructed on the existing bridge piers and the existing supports. The newly-built support is rigidly connected to the lower portion of the 0 # block structure and used for reinforcing the existing beam body, and the existing support is flexibly connected with the existing beam body, so that the existing beam body can slightly move up and down in the dismantling process, balance dismantling of the two ends of the existing beam body can be achieved, the existing beam body is dismantled through an in-situ dismantling method under a bridge, and the construction efficiency is improved. And the difficulty of high-altitude hoisting operation is avoided.

The invention relates to the technical field of construction hanging baskets, in particular to a rhombic hanging basket for rapid construction of a cable stiffening bridge screen integrated continuous rigid frame bridge. Comprising a main truss system, a cross beam bottom support system, a walking system, an anchoring system, a guide beam suspension system, a formwork system and an accessory structure. The main truss system is composed of two rhombic trusses which are connected in a parallel connection mode. The cross beam bottom support system comprises a front upper cross beam, a front lower cross beam, a rear lower cross beam and a bottom longitudinal beam which are connected through a sling suspender; the walking system comprises reverse hook wheels, a track and a hydraulic driving device; the anchoring system anchors the hanging basket on the beam body by using a rear anchor beam and an anchoring rib; the guide beam suspension system is connected with the guide beam and the cross beam through a suspender; the formwork system is composed of an outer side formwork, a bottom formwork and an inner formwork. The device integrates light weight, rapidness and precision, and the problems of hanging basket walking, formwork supporting, concrete pouring and vibrating in large-size and large-height continuous rigid frame bridge cantilever pouring are solved. The method is mainly applied to rapid construction of the diamond hanging basket for the continuous rigid frame bridge.

The application discloses a mixed feed additive production feeding lifting device, and relates to the technical field of raw material feeding. The device comprises a cushion frame, the upper end surface of the cushion frame is fixed with a positioning seat, the upper end of the positioning seat is rotationally connected with a second belt, and the other end of the second belt is rotationally connected with a third belt. Through the positioning seat accessory structure, the user can adjust the rotation speed and deflection angle of the leakage disc according to needs, so that the added additives can be controlled to move to the edge for discharging, thereby avoiding material residues and the accumulation caused by traditional single-point feeding. Through the second belt accessory structure, the second belt accessory structure can cooperate with the third belt accessory structure to scrape off the additives adhered to the wall, thereby reducing the waste of additives. On the basis of the positioning seat accessory structure, the discharging effect can be improved, and the discharging efficiency can be further improved.

The application discloses a combined scaffold based on an attached climbing frame and a construction method thereof, and utilizes a switching support to be combined with the attached climbing frame, when the climbing frame cannot match the change of the outer contour of the structure when being lifted to the roof of the attached structure layer, the combined scaffold based on the attached climbing frame plays an important role in switching the bearing, can perfectly fit the change of the outer contour of the roof structure and solve the problem that the climbing frame is limited in climbing, the attached climbing frame can be one-time climbed to the top, the operation platform of the attached climbing frame can cover the whole roof attached structure layer construction, and the attached structure layer does not need to be re-set up a cantilever frame with great effort. The application solves the problem that the change of the structure of the roof attached layer of the super high-rise main structure leads to the problem that the re-set cantilever frame mode or the split lifting mode of the special design of the climbing frame is used to meet the roof layer and the attached construction, thereby prolonging the construction period and increasing the construction cost.

The present application relates to the technical field of aircraft accessory structure, and particularly relates to a handle boost structure of a boarding door of a civil aircraft, which comprises a boost system composed of an operating handle, a lifting handle, a first rocker arm, a connecting rod, a sliding block, a supporting rod, a second rocker arm and a force amplification rod, the operating handle is rotationally connected with the lifting handle and synchronously drives the first rocker arm, the sliding block is driven to slide along the lifting handle in the axial direction through the connecting rod, and then power is fed back to the lifting handle through the supporting rod, the second rocker arm and the force amplification rod, the stable wrist rotation torque is converted into efficient lifting torque, the boost effect is significantly improved, and the operation burden of the cabin crew is reduced, the flexible adjustment of the amplification coefficient can be realized by replacing the supporting rods with different lengths, the overall component is designed with a weight reduction hole, the stringent lightweight requirement of aviation is met, and the handle boost structure has extremely strong engineering practical value.

This invention relates to the field of engineering construction technology, specifically a construction method for a tunnel on a high slope. The method includes: S01, excavating the top of the tunnel and providing slope support; S02, excavating the right side of the tunnel and providing temporary support; S03, excavating the left side of the tunnel and providing initial support, pre-anchor support, and temporary steel frame support; S04, pouring the left tunnel structure and bottom slab; S05, constructing temporary steel frame support and dismantling the existing temporary steel frame support; S06, constructing the right tunnel structure; S07, constructing ancillary structures such as drainage ditches, cable trenches, and road surfaces within the tunnel; S08, backfilling and counter-pressure at the top of the tunnel, constructing a top seepage-proof layer, drainage ditches, and landscaping. This invention reduces excavation volume, minimizes damage to the natural environment of the mountain, avoids slope deformation and instability caused by prolonged exposure, and ensures the safe and smooth progress of the project. It also avoids structural damage to the tunnel due to water accumulation and insufficient backfill compaction.

The jacking and pulling combined building lifting construction method comprises the following steps that firstly, a to-be-lifted building is disconnected at a preset position; 2, bracket holes are formed respectively, and lifting devices are mounted on lifting parts between the basement and the upper accessory structure respectively; 3, a jack is arranged on a steel corbel at the top of the lifting device supporting steel column; 4, jacks of all the lifting devices are connected to an oil pump pressure system; 5, an instruction is sent to an oil pump pressure system through the computer control system, so that the steel corbels located in the corbel holes are tightly attached to the upper ring beam and the beam bottom structural face; 6, the jacks of all the lifting parts are controlled to conduct lifting work, and lifting is stopped after preset displacement is achieved; and 7, construction of the wall column of the lifting section is conducted, and after construction is completed, all the lifting devices are removed. The technical problems that an existing lifting construction method is complex in procedure and long in construction period are solved, precision is high, accurate positioning can be achieved, and the number of needed lifting devices is small.

1. The name of the design product: helmet goggles adjusting base. 2. The use of the design product: accessory structure for helmet. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model provides a hinge with a wire passing function on wearable equipment, which comprises a first connecting frame and a second connecting frame, and the first connecting frame and the second connecting frame are rotatably connected around an axis, so that the first connecting frame and the second connecting frame can rotate around the axis relative to each other; the hinge is further provided with a wire passing cylinder, the wire passing cylinder is movably connected with the first connecting frame and the second connecting frame, can rotate around the axis and rotate relative to the first connecting frame and the second connecting frame, and the wire passing cylinder comprises two wire passing grooves formed in the rotating direction. The maximum rotation angle of the wire passing cylinder is smaller than the maximum relative rotation angle of the first connecting frame and the second connecting frame and the central angle between the two wire passing grooves. According to the utility model, the sleeve with the wire passing groove can rotate or not rotate when the hinge is opened at different angles, so that the maximum rotating angle of the wire passing cylinder can be adjusted according to an actual application object, and the wire passing groove can be shielded in a targeted manner without completely depending on the thickness of an accessory structure.

The application relates to a construction method for in-situ expansion of a multi-arch tunnel, and belongs to the technical field of tunnel construction. The method comprises the following steps: according to the section contour of an existing multi-arch tunnel, a section contour of an in-situ expansion tunnel is designed; a part of the existing tunnel on one side exceeding the section contour of the in-situ expansion tunnel is treated by grouting backfilling and reinforcement; a part of rock mass on the other side of the arch top is excavated, and a part of the lining structure of the existing tunnel on the side is removed; a part of rock mass of the arch part is excavated, and a part of the lining structure of the existing tunnel on one side is removed to make the primary support closed into a ring; the secondary lining, the arch wall and other structures of the remaining part of the existing tunnel are removed; the surface and the inverted arch structure of the existing tunnel are removed by blasting operation, the inverted arch primary support is constructed, the secondary lining is constructed, and other auxiliary structures are constructed. The existing tunnel is utilized, and the excavation area of the expansion project is reduced; meanwhile, the spoil produced by excavation and the concrete, steel frame and other materials of the existing tunnel which are replaced are reused, and the construction concept of green construction is embodied.

The application provides an interface pre-buried box type protection waterproof structure and a construction method, which comprises: a waterproof layer arranged outside a main body structure and an auxiliary structure, wherein the waterproof layer is directly in contact with a soil layer; two edge positions of a splicing joint of the main body structure and the auxiliary structure are provided with water stop glue; a box type protection device is embedded on the main body structure, the box type protection device is arranged between the two water stop glues, a first waterproof steel plate is arranged in the box type protection device, concrete is also poured in the box type protection device, one side of the first waterproof steel plate is provided with a second waterproof steel plate arranged in the auxiliary structure, one end of the second waterproof steel plate is arranged in the auxiliary structure, and the other end of the second waterproof steel plate is welded with the first waterproof steel plate. The problems of unstable performance of water stop glue, non-dense grouting filling and repeated grouting unable to realize complete sealing in the prior art are solved.

The invention belongs to the technical field of connectors, and particularly relates to a cavity water-pressure-resistant tail accessory structure and a watertight connector, the cavity water-pressure-resistant tail accessory structure comprises a sleeve arranged at the rear end of the connector, a bonding sleeve is arranged in an inner cavity of the sleeve, a cavity is formed in the inner wall of a through hole of the bonding sleeve, and the side wall of the cavity is an inclined plane; and after the watertight cable is inserted into the bonding sleeve, glue is poured to form a glue body part so as to realize tensile resistance of the watertight cable. The rubber body part is formed after the bonding sleeve is filled with rubber, when the rubber body part is subjected to water pressure, the inclined face facing the rear side can reduce axial force, the larger the water pressure borne by the rubber body part is, the larger the extrusion force generated by the inclined face inwards and backwards is, and the better the forward anti-channeling effect on a watertight cable or a pipeline is; the inclined surface facing the front side can play a tensile role, when the structure bears a backward pulling force, the colloid part formed after glue pouring is pulled backwards, the larger the pulling force is, the larger the inclined surface generates a larger extrusion force on the colloid part in the inward and forward directions, and the better the tensile function is.

The utility model discloses a guide pillar accessory structure of a hardware stamping die, relates to the technical field of stamping dies, and aims to solve the problems that partial stress of a guide pillar is concentrated due to unbalance loading in the working process of the current die, the friction coefficient between a guide sleeve of an upper die and the guide pillar is large, and the service life of the guide pillar is prolonged. The device comprises a guide mechanism and a sliding mechanism arranged on the guide mechanism, the guide mechanism comprises a base plate, a positioning column is arranged at the upper end of a fixed column, a guide head is arranged at the upper end of the positioning column, and the sliding mechanism is arranged on the base plate. Auxiliary positioning rods are installed between the guide head and the fixing column in an array mode. The guide pillar has the advantages that lateral force and torque generated in the stamping process of the die can be better resisted, local stress concentration is avoided, deformation or damage caused by uneven stress of the guide pillar is reduced, serious local abrasion caused by long-term one-way friction can be avoided, and adaptability and reliability of the die are improved.

This invention provides a towing construction process for a double-layer steel truss bridge with sequentially connected double-layer cast-in-place box girders. The steps are as follows: construct the bridge's pile foundations and abutments, construct the piers, erect assembly supports, hoist the guide beam, and assemble the steel truss section; first, hoist the guide beam and the assembled steel truss section, then perform the first towing; after completion, hoist the remaining sections for subsequent towing construction; after the first towing is completed, construct the unaffected cast-in-place box girder section on the left; after the steel truss reaches the assembly supports above the fourth pier, the guide beam can be removed, and the unaffected cast-in-place box girder section on the right can be constructed; after the overall towing is completed, construct the upper piers, construct the auxiliary structures, and dismantle the assembly supports. This overcomes the limitations of existing technologies where the steel truss cannot be installed on the piers at the junction of the truss section and the cast-in-place box girder section. Furthermore, by constructing the cast-in-place box girder during the towing and assembly process, the construction period is significantly shortened, and traffic control time is reduced.

The present application belongs to the technical field of bridge design and construction, and particularly relates to a method for synchronously constructing a tower and a girder of a special-shaped steel tower cable-stayed bridge, comprising the following steps: synchronously erecting a cable-stayed bridge girder support, a steel tower support and a gantry crane foundation; laying a gantry crane track on the gantry crane foundation and installing a gantry crane; installing a rotating steel tower steel and concrete combined section and pouring concrete; installing a rotating steel tower T1 section and testing the rotating body; pouring a cable-stayed bridge girder and assembling remaining steel tower sections through the gantry crane; installing a lattice column and a lattice column jack and vertically rotating the steel tower; installing and tensioning a stay cable and removing an auxiliary structure; installing a bridge deck pavement and completing the construction of the special-shaped steel tower cable-stayed bridge. The present application has the beneficial effect of realizing synchronous construction of a bridge tower and a girder and solving the problem of a tight bridge construction period.

The application discloses a molybdenum metal accessory processing technology, which comprises a plate with a concave surface and an annular extension edge around the plate; the processing technology comprises the following steps: (1) plate punching positioning, (2) liquid filling forming of the plate, (3) heating, shaping and setting, and obtaining the molybdenum metal accessory. The application adopts the liquid filling forming process to replace the existing stamping forming process, specifically, the concave die plate is filled with high-pressure liquid, and the stamping forming method of establishing reverse hydraulic pressure when the convex die plate drives the plate blank into the concave die plate is used. Meanwhile, according to the high strength and high resilience characteristics of the accessory material, the plate punching positioning process is added in the processing process, and the variation coefficient of the accessory is reduced by further heating, shaping and setting after preforming, so that the product shape and size precision are high, the yield is high, and the production cost is low under the premise of meeting the overall reliability and strength requirements of the accessory structure.

The application discloses a kind of old approach bridge's demolition method, its construction steps are as follows: S1, cast-in-place wearing course, cast-in-place surface layer and accessory structure on land section bridge deck are removed;S2, using pick head machine is sequentially removed to the same span of multiple hollow slab beams of land section;S3, using pick head machine is removed to the cap beam of front end;S4, repeat step S2-step S3, sequentially remove the remaining hollow slab beam and cap beam of land section;S5, using pick head machine is crushed and removed to land section pile foundation;S6, in the starting place of water section approach bridge, new and old approach bridge is assembled and built across bridge machine;S7, using bridge machine is sequentially removed to hollow slab beam of water section from bank side to river side;S8, after being withdrawn along the cap beam of water section, it is removed.The application mainly uses pick head machine and bridge machine to demolish, and is superior to floating crane and crane in safety, construction period, process operability, economy, environmental protection, can be more perfect to solve the problem of approach bridge demolition under restricted conditions.

Provided is an accessory structure of a circuit breaker. The circuit breaker accessory tripping mechanism mainly solves the problem that friction force between parts of a conventional circuit breaker accessory tripping mechanism is large, and tripping efficiency is affected. The device is characterized by further comprising a first rotating shaft which is arranged in the shell and used for being rotatably connected with the support; the second rotating shaft is arranged on the first rotating shaft and coaxially arranged with the first rotating shaft, the diameter of the second rotating shaft is smaller than that of the first rotating shaft, and the third rotating shaft is arranged on the second rotating shaft and coaxially arranged with the second rotating shaft, the diameter of the third rotating shaft is smaller than that of the second rotating shaft, and the third rotating shaft is used for being rotationally connected with the shifting rod; and gaps exist between the bracket and the lock catch as well as between the lock catch and the driving lever. According to the accessory structure of the circuit breaker provided by the utility model, the support, the lock catch and the driving lever are mounted through the shafts with different diameters, and the gaps are arranged between every two shafts, so that the contact area is reduced, the friction force is reduced, and the breaking effect is improved.

The utility model discloses an accessory capable of replacing a rotary buckle module, the accessory comprises a buckle sleeve, a rotary buckle and a functional module, a matching cavity is arranged in the buckle sleeve, the rotary buckle is detachably connected in the matching cavity, a decorating part is arranged at the top of the buckle sleeve, and the functional module is arranged between the decorating part and the buckle sleeve to realize the connection between the decorating part and the buckle sleeve. Or when the decorating part is integrally formed on the top of the buckle sleeve, the decorating part is fixedly connected to the top face of the rotary buckle in the matching cavity, the accessory can be connected to a shoelace of a shoe, the decorating part arranged on the top of the buckle sleeve can be provided with different patterns, and different accessory structures can be formed through different functional modules; according to the shoe accessory, the additional beautifying effect and function are provided for shoes provided with the accessory, so that the dynamic effect of shoe products in the using process is improved, the appearance of the shoes is more attractive, new fun is brought to children pursuing fashion, and the purpose of promoting selling of the shoe products is achieved.

The invention discloses a three-span continuous beam-arch combined system bridge superstructure system conversion method, and relates to the technical field of bridge engineering construction, and the method comprises the following steps: building a temporary support system; erecting and connecting a beam body; installing and tensioning the arch structure; implementing system conversion; and follow-up structure construction and acceptance check are conducted, construction of a bridge deck system and accessory structures is completed, and the stress state and linear indexes of the beam-arch combined system are comprehensively detected. According to the method, temporary support arrangement and a pre-pressing scheme are optimized by combining stress analysis, the support stability is improved, accurate control over beam body connection is achieved through symmetrical hoisting and strain monitoring, graded unloading quantitative calculation is completed based on a load distribution algorithm, stable stress is guaranteed, a displacement and stress two-dimensional monitoring system is built, and a quantitative standard is defined; through prestress loss multi-factor calculation compensation, the tensioning control stress is accurately determined, multi-link cooperative power generation is achieved, the defects of a traditional technology are effectively avoided, and finally efficient, safe and high-precision construction of a cooperative stress system is achieved.

The invention belongs to the technical field of constructional engineering, provides a construction method for efficiently breaking an enclosure structure shared by an underground engineering main body and an accessory structure, and aims to solve the problems of low efficiency and serious pollution caused by breaking the underground engineering in a mode of combining rope saw cutting and an air pick machine. The first area and the third area of the enclosure structure are subjected to static expansion breaking through the expanding agent, the second area with the large area is subjected to cutting breaking through the rope saw, the breaking efficiency can be improved, and meanwhile noise pollution and flying dust pollution generated when the maintenance structure is broken are reduced. The underground engineering can be entirely and comprehensively capped, and underground water is prevented from entering the underground engineering; and meanwhile, the influence on the existing underground engineering is eliminated.

The application discloses a kind of construction methods of subway station auxiliary construction and shield construction synchronization, it has increased the horizontal and vertical displacement monitoring point of gantry crane track beam after installing shield construction to carry out, so as to real-time monitoring the influence caused by auxiliary construction to the running stability of gantry crane, guarantee the safety of shield construction.Then carry out station auxiliary structure construction, realize the synchronization of auxiliary construction in shield construction process, advance into auxiliary construction phase, after shield construction is completed, station auxiliary structure can be completed 90%, greatly speed up the construction progress, greatly shorten construction period.And, after shield construction is completed, only a small part of bored pile is reserved, to facilitate the whole area of post-cast strip construction to be completed once, after post-cast strip construction is completed, the small amount of bored pile reserved is cut off, the bored pile removal scheme is optimized, the construction progress of auxiliary structure is speeded up, and the auxiliary construction period is shortened.

The utility model discloses a buoyancy bag folding and self-unfolding structure which comprises a storage frame and a buoyancy bag arranged in the storage frame, the buoyancy bag comprises a middle part and movable parts at the two ends of the middle part, a winding part used for synchronously winding the movable parts at the two ends of the buoyancy bag is arranged in the storage frame, and the buoyancy bag can be bidirectionally and synchronously unfolded when inflated. The winding component comprises two sets of winding drums, constant-speed reverse linkage is achieved through a gear transmission mechanism, and winding can be driven through a motor or a handle. The storage rack is provided with accessory structures such as a guide side plate, an elastic binding belt and a protective blocking belt capable of being rolled up, and the folding and unfolding guiding, pressing and protecting performance is improved. The buoyancy bag can be rapidly and evenly unfolded in a compact storage state, the structure is stable, operation is easy and convenient, and the buoyancy bag unfolding device is suitable for occasions with high space and time requirements such as small boats and emergency rescue.

The utility model relates to the technical field of liquid cooling plates, in particular to a friction welding liquid cooling plate and a power box, the friction welding liquid cooling plate comprises a substrate and a cover plate, the substrate is provided with a first through hole, the cover plate is provided with a boss, the boss penetrates through the first through hole, and the part, extending into the first through hole, of the boss is connected with the substrate. According to the friction welding liquid cooling plate, the boss is matched with the first through hole, a new friction welding seam can be formed between the base plate and the cover plate, holes do not need to be formed in the cover plate, and a continuous planar area with a large area can be conveniently formed on the cover plate and used for installing components or arranging accessory structures; moreover, as the new friction welding seam is located at the position where the boss extends into the first through hole, the influence of all structures on the surface of the cover plate is small, the arrangement position is relatively flexible, and the new friction welding seam can be conveniently arranged close to the flow channel, so that the compression strength of the flow channel is improved, and the deformation risk and the leakage risk are reduced.

The utility model provides an accessory structure and a switching device, and relates to the technical field of electrical equipment. The accessory structure comprises a base and an upper cover. The base and the upper cover are oppositely arranged, one of the base and the upper cover is provided with an assembly boss, and the other one of the base and the upper cover is provided with an assembly through hole. The assembling boss is arranged in the assembling through hole in a penetrating mode, part of the assembling boss is exposed through the assembling through hole, and the part, exposed through the assembling through hole, of the assembling boss is punched and riveted to form a fixing unit so that the base can be connected with the upper cover. Thus, the connection strength of the base and the upper cover is large, the wiring performance and the impact resistance can be improved, and the reliability of normal work of the switching device carrying the accessory structure is improved. In addition, the manufacturing cost of the accessory structure can be reduced.

The utility model discloses a soft oxygen cabin silencer accessory structure which comprises an air pipe, a shell and silencing cotton arranged in the shell, the shell is of a cylindrical structure, an air inlet connector is arranged on the side wall of the shell, a plurality of air leakage holes are formed in the shell at equal intervals in the axial direction, one end of the air pipe is connected with an oxygen cabin air inlet, and the other end of the air pipe is connected with the air inlet connector. The silencing cotton is used for absorbing whistling generated by high-speed air inlet, and a flexible silencing cotton nozzle is arranged on the outer side of the air leakage hole so as to further restrain exhaust noise. The shell is detachable, the shell is sleeved with a silencing sleeve, the silencing sleeve comprises a pad body wrapping the shell and a hook-and-loop fastener connecting band avoiding the air leakage hole, and a notch is formed in the position, at the air inlet connector, of the pad body. The accessory structure can effectively reduce noise interference in the air inlet process of the oxygen cabin and improve the use experience, and has the advantages of being reasonable in structure, convenient to install and excellent in noise reduction effect.

This utility model discloses a display accessory structure and a jewelry box including the accessory structure, comprising a first connecting plate and a second connecting plate. The first connecting plate is detachably mounted on the second connecting plate, and a clamping force is formed between the first and second connecting plates. The advantages are: this utility model uses a detachable connection between the first and second connecting plates, forming a clamping force at the connection point, which can hold jewelry necklaces, thus ensuring the aesthetics of the display accessory and facilitating operation. Furthermore, the magnetic connection and clamping method facilitates disassembly and assembly, making operation even more convenient. The connection between the first and second connecting plates via a flexible connector ensures real-time connection during necklace installation, preventing the first connecting plate from falling off. The hollowed-out portion can hold excess necklaces, avoiding interference between the necklaces and the first and second connecting plates, and solving the problem of an uneven appearance inside the jewelry box.