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87 results about "Collapsed cavity" patented technology
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A temporary arch protection structure in tunnel initial support arch replacement construction
Owner:SICHUAN ROAD & BRIDGE EAST CHINA CONSTRUCTION CO LTD
Evaporator, evaporation assembly and ice-lolly maker
The evaporator comprises a container main body, a cover body and a sealing piece, the container main body comprises a containing part and a first convex edge part which are connected, the first convex edge part is arranged in a protruding mode relative to the outer periphery of the containing part, the containing part is provided with a containing cavity, and the containing cavity is used for containing refrigerating fluid; the cover body comprises a cover main body and a second convex edge part, the second convex edge part is connected with the first convex edge part, the cover main body is provided with at least one profiling bulge which is convexly arranged towards the cavity bottom of the accommodating cavity, each profiling bulge is provided with a concave cavity with one closed end, and the concave cavities are used for accommodating parts to be cooled; the sealing piece is arranged between the first protruding edge part and the second protruding edge part and surrounds the containing part. By the adoption of the structure, refrigerating fluid in the evaporator is isolated from the outside, the risk that the refrigerating fluid leaks and makes contact with ice-lolly liquid is reduced under the action of the sealing piece, safety performance is improved, and user experience is improved.
Owner:SHENZHEN INTELLIROCKS TECH CO LTD +1
UPVC (unplasticized polyvinyl chloride) pipe bonding auxiliary device
The utility model discloses a UPVC pipe bonding auxiliary device relates to pipeline installation field, including slide rail, pipeline support block and two bonding direction adjusting block, be equipped with three slider on the slide rail, slider can freely slide along the slide rail, pipeline support block corresponds with the middle slider, its top is equipped with the semicircle concave cavity that is used for supporting UPVC pipeline, and the two bonding direction adjusting block is equipped with the semicircle concave cavity that is used for supporting the UPVC pipeline. Through the design of the pipe fitting concave cavity formed by combining the cross-shaped concave cavity and the round concave cavity at the bottom, the bonding direction adjusting block can position and support the UPVC pipe fittings, the angle between the two UPVC pipe fittings in the bonding process is ensured to meet the requirements (such as 0 degree, 90 degrees and 180 degrees), the problem of deviation caused by manual naked eye judgment is thoroughly solved, the production efficiency is improved, and the production cost is reduced. And it is ensured that the bonded pipeline is installed in place at a time, reworking is avoided, waste of materials is reduced, and working efficiency is improved.
Owner:KAIFENG SHIDAI NEW ENERGY TECH CO LTD
Ring main unit convenient to install
ActiveCN224053708USubstation/switching arrangement casingsAnti-seismic devicesCollapsed cavityScrew thread
Owner:GONGHONG ELECTRIC APPLIANCE CO LTD
Production mold for split-type grit-textured packaging bottle
A production mold for a split-type grit-textured packaging bottle includes fixed-mold and movable-mold assemblies. The fixed-mold assembly has top and bottom provided with injection channel and fixed-mold A plate respectively. Fixed-mold insert(s) installed in the fixed-mold A plate communicates with the injection channel, and corresponds to a concave cavity having bottom consistent with product's closed end in shape. Two inclined guide pillars are provided the concave cavity's two sides. The movable-mold assembly's top has a movable-mold B plate provided with a B-plate insert with a concave cavity-facing mold core. The B-plate insert's end relative to the product forms internally as an inverted cone structure. A pushing assembly includes a movable-mold push plate movable on the movable-mold B plate and having a top provided, relative to the concave cavity, with side sliders for correspondingly driving the guide pillars. Sliders'product-facing sides have structures matching grit texture on the product's outer wall.
Owner:SHENZHEN PORSHEALTH BIOENGINEERING CO LTD
A knuckle, a front suspension system and a vehicle
The utility model discloses a knuckle, front suspension system and car, including the knuckle body of casting forming, knuckle body is equipped with by the bearing mounting hole of outside extension to the back side, the back side of knuckle body is equipped with the recessed cavity of recessing to the outside side in the position of corresponding bearing mounting hole, the cavity wall of recessed cavity forms encircling type reinforcing rib, the top of knuckle body is equipped with damper mounting part, and the damper mounting part extends upward from the top of knuckle body, and the inside of damper mounting part is equipped with hollow recess, and hollow recess forms hollow entrance in the cavity wall of recessed cavity. The utility model discloses through the implementation of large -area's hole digging weight reduction, and the recessed design is suitable simultaneously, forms certain depth thin wall four -corner surrounding structure, and the reinforcing rib of suitable whole circle slender encircling type, has promoted strength and durability, realizes the balance of light weight and performance. Meanwhile, the hollow casting structure is used to the damper mounting part, and the weight is reduced greatly through the hollow structure.
Owner:GAC HONDA AUTOMOBILE CO LTD +1
Flexible protection device for treating collapsed cavity at top of tunnel
ActiveCN224214198UEnsure construction safetyGuaranteed operational safetyAnchoring boltsProtective coversCollapsed cavityRock bolt
The utility model discloses a flexible protective device for treating a collapsed cavity at the top of a tunnel, which comprises at least two flexible protective nets which are arranged from top to bottom and connected to the inner wall of the collapsed cavity, and the aperture of the lower part of each flexible protective net is smaller than that of the upper part of each flexible protective net. The protective net is composed of a steel wire rope protective net body and a twisted-pair hexagonal flexible net body, the steel wire rope protective net body is formed by rhombic weaving of Galfan coating steel wire ropes, and the twisted-pair hexagonal flexible net body is formed by weaving of A-grade Galfan coating steel wires, overlaps the edge of the steel wire rope protective net body by 10-20 cm and is tied. The steel wire rope protective net is formed by splicing meshes of different specifications, splicing follows a specific principle, and steel wire rope buckles are used for connection. The device is further provided with anchor rods, spring hooks and other components, and the number and size of the components are determined according to the three-dimensional data of the collapsed cavity. Compared with a traditional protective net, the device can effectively absorb rockfall energy, is good in buffering effect, high in adaptability to different collapse cavities, easy and convenient to install and capable of reducing construction risks and guaranteeing tunnel construction and operation safety.
Owner:THE SECOND ENG CO LTD OF CHINA RAILWAY 14TH CONSTR BUREAU CO LTD +1
Upper air outlet type ventilation blade assembly and ventilation window
The utility model discloses an upper air outlet type ventilation blade assembly and a ventilation window, and the upper air outlet type ventilation blade assembly comprises at least two blade groups which are distributed at intervals along the front-back direction; each blade group comprises a plurality of blades which are distributed at intervals in the vertical direction; the section of each blade is of a V-shaped structure, each blade comprises a first plate and a second plate which are sequentially arranged in the front-back direction and form an included angle, a V-shaped cavity with an upward opening is formed between each first plate and the corresponding second plate, the lower end of each first plate extends to be provided with an extension plate, and a concave cavity with a backward opening is formed between each extension plate and the corresponding second plate. A water falling hole capable of communicating the V-shaped cavity with the concave cavity is formed in the second plate piece; the air flow sent out through the blade assembly is in a rising state, the upward air outlet effect is achieved, and when the air flow passes through the extension plate, negative pressure is formed in the concave cavity through the Venturi effect, so that accumulated water flows out of the water falling hole more easily, the water drainage efficiency is improved, and the water accumulation situation is reduced.
Owner:ZHONGSHAN HUAXIA VENTILATION EQUIP CO LTD
Spherical glass sliding door for pleasure boat
The spherical glass sliding door for the pleasure boat comprises a main deck and a boat body, the top of the main deck is fixedly connected with a lower end rail base, the top of the lower end rail base is fixedly connected with a lower end rail, the top of the lower end rail is connected with a glass frame in a sliding mode, and the bottom end of the glass frame is provided with a structural concave cavity. A steel roller assembly is connected into the structural concave cavity through a screw and rolls on the lower end rail, and glass is bonded to the glass frame. The sliding door is designed into a spherical surface, the upper track arc and the lower track arc rotate around the same axis, and the glass is customized into a special shape. The spherical glass sliding door is mounted on the peripheral wall of the passenger cabin in an externally-hung manner, so that the requirements of neat and harmonious appearance and safe and reliable operation of each function after a door is mounted on a sightseeing boat with a special shape are met. Meanwhile, the light transmitting area in the passenger cabin is increased, and the sightseeing experience of tourists is greatly improved.
Owner:WUXI DONGFANG HIGH PERFORMANCE SHIP ENG
Hydrodynamic deep drawing forming die and method for stepped part
The invention provides a hydrodynamic deep drawing forming die and method for a step-shaped part, and relates to the technical field of plate forming. The forming die comprises a male die, an edge pressing part, a female die, a left supporting block capable of moving up and down and a right supporting block capable of moving up and down; the left supporting block is arranged at the left end of the lower surface of the upper step of the male die, the right supporting block is arranged at the right end of the lower surface of the upper step of the male die, a hollow part is defined by the left supporting block and the right supporting block, and the inner wall of the hollow part is attached to the side wall of the lower step of the male die; the outer wall contour of the hollow part coincides with the downward projection of the side wall contour of the upper step of the male die; an inner cavity of the female die is composed of an upper concave cavity and a lower concave cavity, and a fluid channel communicated with the outside is formed in the inner wall of the lower concave cavity. When the forming die provided by the invention is used for forming the stepped part, excessive thinning of a plate and a plate suspension area corresponding to the two layers of stepped fillets of the convex die can be avoided, and wrinkling of the plate suspension area is avoided.
Owner:HARBIN INST OF TECH
Hall element protection seat
ActiveCN223652480URelieving strain on wire connectionCasings/cabinets/drawers detailsHall elementCollapsed cavity
The utility model relates to a Hall element protection seat, which comprises a seat body with an inner cavity, mounting plates are respectively arranged on two sides of the periphery of the seat body, a mounting seat is arranged on the side surface of the mounting plate on one side, a concave cavity is arranged on the mounting seat, and a sinking cavity for accommodating a Hall element is arranged at the rear end of the concave cavity. A wire outlet hole is formed in the front end part of the mounting seat at the front end of the concave cavity; and a wire of the Hall element can extend to the front end of the concave cavity along the bottom surface of the concave cavity after being bent and then is led out from the wire outlet hole. According to the utility model, the lead of the Hall element is led out from the wire outlet hole at the front end of the concave cavity, and the peripheral wall of the wire outlet hole is used for limiting the lead, so that the lead cannot be randomly scattered; since the lead wire and the bottom surface of the concave cavity do not need to be bonded by glue, a gluing process in a conventional structure can be omitted, the cost is reduced, the overall aesthetic property of the protection seat is improved, and the lead wire does not fall off in the use process, so that the normal work of the Hall element is effectively ensured.
Owner:CHANGZHOU ZHUOYOU ELECTRIC APPLIANCE CO LTD
Adjusting module for preassembling metering shell
Owner:QIANWEI KROMSCHRODER METERS CHONGQING
Anti-theft bottle cap structure
The utility model relates to a kind of anti-theft bottle cap structure, its technical solution main points are: including: upper cover, and lower cover;The upper cover foldable cover is arranged on the lower cover;Its characterized in that, the lower end of the one side of the upper cover is provided with anti-theft structure;The lower cover is provided with the accommodation cavity for accommodating the anti-theft structure;The side wall of the accommodation cavity is provided with the reverse buckle for being buckled with the anti-theft structure;Overall structure is stable, easy to install, anti-theft structure is arranged on the outside, reverse buckle is buckled with anti-theft structure, when opening, anti-theft structure can be stored in the recess cavity of lower cover, can effectively avoid the situation that the content in packaging bottle is polluted appears;Meanwhile, it can prevent collision and scratch in transportation and anti-theft ring falls off.
Owner:MANSHENG PACKAGING SHANGHAI
Device and method for forming corrugated pipe by using reclaimed material
The device comprises a feeding injection molding machine, a deslagging assembly and a discharging injection molding machine, the deslagging assembly comprises a base, a main feeding hole is formed in the base, and the sectional area of the main feeding hole is gradually reduced in the direction close to a concave cavity to form a structure with the section close to a rectangle; a main discharge hole is formed in the base, and the main discharge hole is blocked in the middle close to the concave cavity, so that an auxiliary discharge hole is formed in the main discharge hole close to the concave cavity; according to the device, the impurity filtering efficiency can be effectively improved, so that the corrugated pipe production efficiency is greatly improved, a pelletizer is not needed, the investment and energy consumption of equipment are reduced, the production process is simplified, the method does not need to pelletize reclaimed materials, the investment of the equipment is saved, and the production cost is reduced. The method saves energy, and is few in steps and high in efficiency.
Owner:GUANGDONG TONGSU PIPELINE
Construction method and supporting equipment for weak surrounding rock tunnel collapse area
PendingCN121976828AAchieve collaborative stable controlSolve the risk of secondary collapseProtective coversShotcreteCollapsed cavity
The invention provides a construction method and supporting equipment for a weak surrounding rock tunnel collapse area, and the construction method comprises the following steps: S1, after a tunnel collapses, backfilling and back pressing are performed on a cavity collapse area to form a stable slope body; spraying concrete to form a closed surface; s2, a support is built in the tunnel collapse deformation invasion limit area, and supporting is completed; s3, expanding excavation is conducted on the end, away from the closed face, of the tunnel collapse deformation invasion limit area; s4, a pipe shed working chamber is built on the expanding excavation section, and a guide wall is constructed; s5, an advanced pipe shed is constructed on the guide wall, and grouting construction is conducted on the advanced pipe shed; s6, after grouting construction is completed and the design strength is achieved, excavation and supporting construction are conducted on a tunnel cavity area; and S7, collapse section construction is completed, the support is dismantled, and tunnel construction continues. The treatment process of backfilling back pressure, temporary supporting and advanced pipe shed grouting is provided, the secondary collapse risk caused by arch dismounting and replacing in a traditional method is avoided, cooperative stable control over the collapse cavity and the deformation invasion limit area is achieved, and construction safety is guaranteed.
Owner:CHANGJIANG INT HYDRO ENG CO LTD +1
A molding device
The application relates to the technical field of thermoplastic materials, and discloses a forming device which comprises a base and a cover body; a first concave cavity is formed in the surface of the base, and a first airflow channel and a second airflow channel are arranged on the base; a boss matched with the first concave cavity is arranged on the cover body; a second concave cavity is formed in the bottom wall of the first concave cavity; a first through hole communicated with the first airflow channel is formed in the side wall of the first concave cavity; and a second through hole communicated with the second airflow channel is formed in the side wall of the first concave cavity. When the LFT material is used to make products, the shearing action of a screw is not needed, so that the glass fiber length of the formed products is longer, and the mechanical properties are better. The products prepared by using the application have good fluidity, and are suitable for the production of high-strength complex parts with certain surface appearance requirements.
Owner:GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
Double-layer alloy front anti-collision beam structure
The utility model relates to the technical field of automobile part production, and discloses a double-layer alloy front anti-collision beam structure which comprises a reinforcing plate, a plurality of springs are arranged on one side of the reinforcing plate, the reinforcing plate is in an arc shape, a buffering cushion is arranged at one end of each spring, the buffering cushion is in a plate-shaped arc shape, and the buffering cushion is arranged on the reinforcing plate. An anti-collision beam body is fixedly arranged on one side of the buffering cushion, a buffering cavity is formed in the anti-collision beam body, and a cross-shaped inner plate is fixedly arranged in the buffering cavity of the anti-collision beam body. According to the utility model, through the combination of multiple buffering and energy-absorbing parts, the springs, the buffering pads, the inner and outer energy-absorbing boxes and the crumple cavity greatly improve the energy-absorbing efficiency, effectively cope with collisions with various strengths, reduce the impact injury to people in a vehicle, and solve the problem of poor energy-absorbing efficiency.
Owner:JIANGSU SHUANGJU AUTOMOBILE PARTS
A molding die for an injection molded part having a concave cavity site
Owner:FOSHAN SHUNDE SAILE ELECTRIC CO LTD
Car touch lock structure for integrated airline handcart
ActiveCN224200414Usave spacebeautiful installationLock casingsServing tablesAviationCollapsed cavity
The utility model relates to a spring lock structure for an integrated airline trolley. The spring lock structure comprises a lock disc, a handle, a handle, a lock box and a spring bolt body. A concave cavity structure is arranged on the front side of the lock disc, the lock disc on the rear side of the concave cavity structure is of a protruding block structure, a lock box cover plate is installed on the rear side of the lock box, the lock box cover plate and the protruding block structure are both installed together with the lock disc cover plate on the rear side, and the handle and the hand shank are both installed in the concave cavity structure. Most components such as the handle and the handle are located in the concave cavity structure, so that the use space can be saved, and the handle is particularly suitable for narrow working environments such as kitchens or airplanes.
Owner:SUZHOU LUXIANG AVIATION EQUIP CO LTD
Foundation structure for house building construction
The utility model discloses a foundation structure for house building construction, which relates to the technical field of house foundations, solves the problems that the stability of an existing precast pile is reduced after long-term use, and the existing precast pile is easy to displace and even pull out due to smooth surface, and comprises a pile body and an impermeable layer arranged on the outer surface of the pile body, a reinforcing column is fixedly mounted at the top of the pile body, a two-way threaded rod is rotationally connected to the inner wall of the reinforcing column, and a first bevel gear is fixedly mounted on the outer surface of the two-way threaded rod. The motor can control the reinforcing rod to be horizontally inserted into soil, then a worker can take out the motor and fill the inner concave cavity with concrete, and therefore the stability of the pile body and the reinforcing column in the using process is improved, the impermeable layer can reduce the influence of the external environment on the pile body, and the safety of the pile body is improved. Therefore, the phenomenon that the pile body possibly sinks or shifts under the long-term load effect is effectively prevented, and the anti-pressure ability and stability of a foundation are improved.
Owner:BEIJING HONGCHUANG TIANYE CONSTR ENG CO LTD
Method and system for producing a forklift fender
The application discloses a production method of a forklift mudguard, and comprises the following steps: detecting the thickness of incoming flat plates to obtain actual thickness information; positioning and centering the incoming flat plates after the thickness detection, and then sending the flat plates into a molding station to determine the first molding parameters according to the actual thickness information and historical molding parameters in a molding parameter database and to perform the first molding; carrying the mudguard semi-finished product to a shape detection station, performing preliminary detection by using a non-contact visual detection unit, and performing re-detection by using a contact detection unit when the preliminary detection is unqualified; when both the preliminary detection and the re-detection are unqualified, determining a compensation area, a compensation quantity and re-molding parameters according to the thickness detection result, feature point deviation information and historical records in the molding parameter database, performing re-molding after placing a gasket in the corresponding area of a concave cavity of a molding die, and writing the molding parameters, the detection result and the compensation result into the molding parameter database. The application can improve the forming quality stability of the mudguard.
Owner:ANHUI HELI CO LTD
Shelter Apparatus with Hollow Fusion Panel
Owner:JIANG JINGLEI
A holder for a surgical instrument
This utility model discloses a clamping fixture, which includes a clamping base and clamping modules. The clamping base has a clamping groove in the middle, and the clamping modules are respectively located on both sides of the clamping groove. Each clamping module includes a lifting cylinder and a clamping block. The lifting cylinder is installed on the ground of the clamping base, and the piston rod of the lifting cylinder extends through the top surface of the clamping base and connects to it. The front end of the clamping base extends horizontally to the clamping groove to press the workpiece within the clamping groove. The front end of the clamping base has a cavity with an open bottom. A shaft is installed inside the cavity, and a pressure block is hinged to the shaft. The pressure block is located above the clamping groove, and the thickness of the first end of the pressure block is greater than the thickness of the last end. It has advantages such as simple structure, compact fit, and reasonable design; therefore, it is a product with superior technical and economic performance.
Owner:ZHONGSHAN MINGYA ELECTRONICS CO LTD
Quick connector assembly
The utility model discloses a quick connector assembly which comprises an outer threaded pipe connected between two pipeline bodies, a hexagonal rotating block is fixedly connected to the middle of the surface of the outer threaded pipe, concave cavities are formed in the two ends of the pipeline bodies, first sealing rings are installed in inner cavities of the concave cavities, and outer threads are arranged on the surface of the outer threaded pipe. The second sealing ring is plugged into the reinforcing ring, the first sealing ring is installed in the inner cavity of the concave cavity, and the outer threaded pipe is taken up to be screwed between the two pipeline bodies till the ends of the pipeline bodies stretch into the inner cavity of the reinforcing ring to extrude the second sealing ring. At the moment, the first sealing ring at the end of the external thread pipe is extruded on the inner wall of the pipeline body to achieve double-layer sealing, the pipeline body extends into the inner wall of the reinforcing ring, the connection strength of the pipeline body and the external thread pipe is improved, and the purposes that the double-layer sealing ring is used for guaranteeing the connection sealing performance, and the end of the pipeline extends into the outer ring to improve the connection strength can be achieved.
Owner:QIANJIANG TIANFANG MASCH CO LTD
Construction method for open type TBM full face tunnel boring machine shield tail top collapse
The application provides a construction method for open TBM full-face tunneling machine shield tail top collapse, which adjusts the tunneling support parameters by analyzing the surrounding rock conditions of the tunnel face in front of the cutter head through advanced drilling. The corresponding support mode is adopted for the collapse cavity formed by the shield tail collapse in the tunneling process. Meanwhile, long strip steel plates are densely arranged on the last set of steel arches for the serious collapse block stratum, which plays the role of steel bar row, realizes the open TBM fast and safe passing through the complex stratum such as fold belt without steel bar row, so that the TBM safely and quickly passes through the long distance fold belt, and further improves the tunneling efficiency, reduces the construction safety risk and the damage of the mechanical equipment caused by the collapse block collapse, and adopts the technical measures of "strong support and then filling" for the collapse cavity caused by the upper collapse of the support shoe, and adopts the technical measures of "temporary filling first and then permanent filling" for the collapse cavity at the support shoe, so as to ensure the safe and efficient tunneling of the open TBM.
Owner:CCCC SHEC DONGMENG ENG CO LTD
A prefabricated assembly type bay window top plate and H steel beam connecting method
The application discloses a prefabricated bay window top plate and H-shaped steel beam connecting method, relates to the field of building steel structure installation, and the concave cavity of the outdoor side of the steel beam is a pouring groove, and the concave cavity of the indoor side is a filling groove, and comprises the following steps: S1, prefabricating a bay window upper plate according to construction drawings, and the end of the prefabricated bay window upper plate is provided with a connecting piece; the prefabricated bay window top plate and H-shaped steel beam connecting method are simple in connection, easy to construct, reasonable in force transmission path, simple in factory production, convenient in on-site installation, low in installation danger coefficient, low in requirement for the professional quality of construction workers, beneficial to the organization of workers, easy to realize standardization, industrialization and integration, capable of avoiding on-site wet operation, protecting the environment, saving construction period, and flat in the surface of the prefabricated bay window plate, good in visual effect, and guaranteed in quality, and especially suitable for the bay window top plates matched with the steel structure standardized residential system.
Owner:HENAN JINHUAXIA STEEL STRUCTURE ENG
Calculation method of crown rock collapse depth considering excavation unloading stress redistribution
The application provides a calculation method of a crown arch surrounding rock collapse depth considering excavation unloading stress redistribution, comprising the following steps: step S1: a triangular formula is used to calculate the collapse arch height before excavation; step S2: a tunnel radius, surrounding rock bulk density, cohesive force and internal friction angle are collected; step S3: stress decomposition and stress redistribution analysis are carried out after excavation, and the crown arch surrounding rock collapse depth is obtained. The crown arch surrounding rock collapse cavity depth of the tunnel can be more accurately predicted, the surrounding rock support force is determined, and a reasonable dynamic design basis is provided for the tunnel construction through a fault fracture zone.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Air outlet frame assembly and air conditioner
ActiveCN223691269UDucting arrangementsLighting and heating apparatusCollapsed cavityStructural engineering
The air outlet frame assembly comprises an air outlet frame, a front panel and a decorating part, a concave cavity opened forwards is formed in the front side of the air outlet frame, the bottom wall of the concave cavity is the bottom wall of the concave cavity, the front panel is arranged on the front side of the concave cavity in a covering mode to seal the concave cavity, the lower end of the front panel is located above the bottom wall of the concave cavity, and the decorating part is arranged in the concave cavity. The decorating part is connected to the air outlet frame so as to shield a gap between the lower end of the front panel and the bottom wall of the concave cavity, and the decorating part is an independently-formed part. According to the air outlet frame assembly, the decorating part is arranged on the air outlet frame, the decorating part can shield the gap between the lower end of the front panel and the bottom wall of the concave cavity, dust and other impurities can be prevented from entering the air conditioner through the avoiding gap, the decorating part is an independent forming part, and the air outlet frame assembly is convenient to use. The decorative part and the air outlet frame can be manufactured independently, so that the manufacturing difficulty of the air outlet frame can be reduced, and the mold manufacturing process is simpler.
Owner:GD MIDEA AIR CONDITIONING EQUIP CO LTD +1
High-temperature and high-pressure testing device for multiple sealing gaskets
PendingCN121521451AMachine part testingDetection of fluid at leakage pointCollapsed cavityTitanium alloy
The invention discloses a multi-sealing-gasket high-temperature and high-pressure test device which comprises a stacked flange set arranged between a load loading pressure head and a base, the stacked flange set comprises a pressure column and a plurality of flange pieces which are sequentially stacked, the top of each flange piece is provided with a concave cavity, and the bottom of each flange piece and the bottom of the pressure column are provided with sealing parts. A sealing gasket is filled between the sealing part and the bottom surface of the concave cavity, a composite sealing ring is arranged between the sealing part and the side wall of the concave cavity, the top of the flange piece is provided with a check ring for preventing the composite sealing ring from falling off, the bottom of the concave cavity is provided with an air inlet channel connected with an air supply system, and the side wall of the concave cavity is provided with a leakage detection channel connected with a leakage detection system; the composite sealing ring comprises a flexible sealing layer, a molybdenum-zirconium-titanium alloy sleeve is embedded in the flexible sealing layer, an alloy spring ring is arranged in the molybdenum-zirconium-titanium alloy sleeve, the inner side and the outer side of the composite sealing ring are of tooth-shaped structures, and the tooth-shaped structures make contact with the side wall of the concave cavity and the sealing part in a sealed mode. The stability of high-temperature environment sealing detection is improved, and the efficiency is improved.
Owner:SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
Method and structure for inhibiting second modal wave of high-speed boundary layer to delay transition
The invention discloses a method and structure for inhibiting a second modal wave of a high-speed boundary layer to delay transition, and relates to the technical field of boundary layer flow control, and the method for inhibiting the second modal wave of the high-speed boundary layer to delay transition comprises the following steps: determining a synchronization point of a conical high-speed boundary layer according to a designed incoming flow working condition; an open cavity is provided between the leading edge of the tapered high-speed boundary layer and the synchronization point. The large-size open concave cavity is formed in the surface of the conical high-speed boundary layer, so that the increase of the second modal wave can be effectively inhibited, the transition of the high-speed boundary layer is delayed, the laminar fluidization design of the conical high-speed boundary layer is favorably realized, and the aerodynamic loss and aerodynamic heat caused by the transition of the high-speed boundary layer are reduced.
Owner:CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT