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200 results about "Collapsed cavity" patented technology
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Front longitudinal beam structure and vehicle
The utility model relates to the technical field of vehicles, and provides a front longitudinal beam structure and a vehicle. The front longitudinal beam structure comprises a front longitudinal beam body, the front longitudinal beam body comprises an inner plate and an outer plate which are connected, the inner plate and the outer plate are oppositely arranged, and a collapsing cavity is formed between the inner plate and the outer plate; the ratio of the size of the crumple cavity in the height direction of the vehicle body to the size of the crumple cavity in the width direction of the vehicle body ranges from 2.6 to 2.9. According to the front longitudinal beam structure, the size of the crumple cavity in the width direction of the automobile body can be set according to the arrangement space of a front cabin of an actual extended-range automobile, meanwhile, the size of the crumple cavity in the height direction of the automobile body is increased, the space utilization rate of the front cabin can be increased, it can be guaranteed that the crumple cavity has high energy absorption crumple capacity, and the service life of the crumple cavity is prolonged. Therefore, the vehicle body can meet the collision requirement, and the safety of passengers is ensured.
Owner:ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD +1
Open-type TBM shield reserving in-situ disassembling method for water conveyance tunnel in fractured stratum
PendingCN119664385AGuaranteed stabilityEnsure construction safetyUnderground chambersHydro energy generationCollapsed cavityStructural engineering
The invention discloses an open-type TBM shield reserving in-situ dismantling method for a broken stratum water conveying tunnel. The method comprises the steps that firstly, a collapsed cavity in the top of a shield is backfilled, and broken surrounding rock is subjected to grouting reinforcement; 2, integrally welding the shield; 3, mounting a TBM host and a bridge area hoisting facility; 4, TBM rear matched hoisting facilities are installed, and TBM rear matched equipment is dismantled; fifthly, a main beam and a rear support of the TBM host are dismantled; sixthly, a main drive and a cutterhead of the TBM host are dismounted; and seventhly, grouting reinforcement is conducted on the top area of the cutter head and the top area of the shield. According to the method, the top shield, the side shield and the bottom shield are integrally welded through profile steel before dismantling, the shields are not dismantled and are reserved as permanent supporting bodies during dismantling, various hoisting devices are matched, in-situ safe and efficient dismantling in the TBM hole is achieved, the stability of rock around the hole is fully guaranteed, the construction risk is greatly reduced, and the construction safety and the construction progress are effectively guaranteed.
Owner:SINOHYRDO ENG BUREAU 3 CO LTD
A temporary arch protection structure in tunnel initial support arch replacement construction
Owner:SICHUAN ROAD & BRIDGE EAST CHINA CONSTRUCTION CO LTD
TBM gripper shoe self-adaptive step changing device, control system and method
The invention discloses a TBM gripper shoe adaptive step changing device, a control system and a method, and relates to the technical field of tunneling equipment automation, the TBM gripper shoe adaptive step changing device comprises a data acquisition module (laser radar array), a data processing module (point cloud denoising and feature extraction) and a control module (path planning and hydraulic servo control); according to the method, the surface of surrounding rock is scanned in real time through a laser radar, the characteristics of a steel arch and a collapse cavity are recognized in combination with an improved RANSAC algorithm and PointNet + +, a collision-free step changing path is automatically planned according to matching conditions, and displacement of an oil cylinder is accurately controlled through PID; the problems that traditional manual operation is low in positioning precision, cavity collapse response lags behind, and efficiency is limited are solved, and the safety and efficiency of TBM continuous tunneling are remarkably improved.
Owner:CHINA RAILWAY TUNNEL GROUP CO LTD +1
Top arch collapse cavity treatment method for tuffaceous volcanic ash stratum
The invention relates to the technical field of open-type TBM construction, in particular to a tuffaceous volcanic ash stratum top arch collapse cavity treatment method. The collapse cavity of the top arch is grouted through three grouting procedures, and specific grouting liquid is used in each procedure; the grouting range of the first-time shallow grouting sealing is 0-3 m outside the outline of the tunnel vault, the surface layer of the collapse cavity is sealed after grouting, and it is guaranteed that follow-up grouting slurry is not lost; the grouting ranges of the subsequent two procedures are 3-4.5 m and 4.5-6 m outside the outline of the vault of the tunnel, and the damage rate of the tuffaceous volcanic ash stratum is reduced through the three-time grouting procedure; the method not only can reduce the change rate of the convergence value of the section, but also can reduce the loss of the grouting liquid, and is suitable for implementation of large-scale construction projects.
Owner:SINOHYDRO BUREAU 14 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
An electromagnet structure and its oil tank isolation valve
ActiveCN113389922BOperating means/releasing devices for valvesCheck valvesIsolation valveCollapsed cavity
The present invention discloses an electromagnet structure and its oil tank isolation valve, the electromagnet structure includes a lower shell, a coil frame, an enameled wire and a yoke iron plate; the through hole of the coil frame is arranged vertically, the enameled wire is wound in the winding window of the coil frame, and the yoke iron plate covers the upper flange of the coil frame; the lower shell is provided with a concave cavity with an opening facing upward, the top of the cavity wall of the concave cavity of the lower shell is provided with a support, and the edge of the yoke iron plate rests on the support of the lower shell; the yoke iron plate is covered with a layer of a first sealing colloid formed by injection, and the first sealing colloid abuts against the inner side of the top of the cavity wall of the concave cavity of the lower shell. The present invention can not only realize the long-term and effective sealing of the coil part in the electromagnet structure, avoid premature failure of the seal, so as to meet the higher sealing performance requirements; but also reduce the difficulty of product manufacturing and greatly reduce the product production cost.
Owner:XIAMEN HONGFA AUTOMOTIVE ELECTRONICS CO LTD
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
Front mold, mold and front mold processing method capable of improving product quality
The present invention discloses a front mold capable of improving product quality, comprising a front mold body, wherein the front mold body has a concave cavity, wherein the concave cavity is divided into a first cavity and a second cavity which are interconnected and connected to each other, and a cavity mouth of the concave cavity is formed on a side of the first cavity away from the second cavity; the first cavity is formed by CNC processing; the second cavity is formed by electric spark processing; the present invention can avoid causing the cavity wall draft angle of the concave cavity to become smaller or even form an undercut, so as to avoid causing product damage or scraping, thereby improving product quality; the present invention also discloses a mold and a processing method of the front mold capable of improving product quality.
Owner:SHENZHEN FENDA TECH CO LTD
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
A support structure for heat exchange tubes
A support structure for a heat exchange tube includes: a gasket; a pipe clamp in an inverted U shape, having a first support section extending upward, a second support section arranged side by side with the first support section, and a transition section connecting the two, the first support section, the second support section, and the transition section jointly define a concave cavity with an opening facing downward and opposite to a first surface, so that a first heat exchange tube can be inserted into the concave cavity through the opening, and a first slot and a second slot are respectively provided on the first surface of the gasket corresponding to the first support section and the second support section; the lower end of the first support section is inserted into the first slot, and the side surface of the lower end of the first support section is connected to the corresponding side wall of the first slot by welding; the lower end of the second support section is inserted into the second slot, and the side surface of the lower end of the second support section is connected to the corresponding side wall of the second slot by welding. Compared with the prior art, the pipe clamp of the utility model can be stably constrained on the gasket.
Owner:ZHENHAI PETROCHEMICAL JIANAN ENGINEERING CO LTD
Blister tray with buffer gasket
ActiveCN223187906UContainers to prevent mechanical damageRigid containersCollapsed cavityClassical mechanics
The utility model relates to the technical field of blister trays, in particular to a blister tray with a buffer gasket, which comprises a rectangular frame, a concave cavity arranged in the middle of the frame, a plurality of support tables respectively arranged on the side edges of the periphery of the concave cavity, and the support tables are protruded upwards from the bottom of the concave cavity. The horizontal plane where the upper end faces of the supporting tables are located is lower than the horizontal plane where the upper end faces of the frames are located, and a notch is formed between every two adjacent supporting tables. A first buffer gasket is arranged on the upper end face of the supporting table; a second groove is further formed between the end, away from the cavity, of the supporting table and the frame. According to the blister tray with the buffer gasket, the friction force between a product and the supporting table is effectively increased, the horizontal movement tendency of the product relative to the blister tray is reduced, shaking and displacement of the product are avoided, and meanwhile collision and friction between the side face of the product and the blister tray can be avoided; the problem that a product is abraded due to collision and friction between the product and the blister tray is solved.
Owner:VARITRONIX HEYUAN DISPLAY TECH
Glue pouring installation structure of handle
The utility model discloses a glue filling mounting structure of a handle, which comprises a framework, a concave cavity is arranged in the framework, a welding plate is arranged on the concave cavity, a PCB (printed circuit board) is arranged on the welding plate, an electronic element is arranged on the PCB, first baffles are arranged on two sides of the PCB, a first glue filling chamber for filling glue is arranged between the first baffles, and a second glue filling chamber for filling glue is arranged between the second baffles. A second baffle is arranged on one side of the concave cavity, and a secondary glue pouring cavity is formed between the second baffle and the welding plate. According to the utility model, the glue filling area is limited, so that the glue material is saved, the unnecessary weight is reduced, the glue is quickly cured, and enough fixing force and sealing effect are provided.
Owner:NINGBO HUADE AUTOMOBILE PARTS
Dynamic strain gauge
ActiveCN222811498UElectrical/magnetic solid deformation measurementStands/trestlesCollapsed cavityClassical mechanics
The utility model relates to a dynamic strain gauge, and belongs to the field of detection equipment, the dynamic strain gauge comprises a housing, and the bottom ends of the left and right side walls of the housing are provided with concave cavities; the cavity wall, facing the top end of the machine shell, of the concave cavity is parallel to the surface of the bottom end of the machine shell, the bottom end of the concave cavity is communicated with the end face of the bottom end of the machine shell, and an included angle formed between the cavity wall, facing the front end of the machine shell, of the concave cavity and the cavity wall, facing the upper portion, of the concave cavity is an obtuse angle. Supporting legs are arranged in the concave cavities, one ends of the supporting legs are hinged to the interiors of the concave cavities, and the other ends of the supporting legs are free ends; when the supporting legs abut against the cavity wall, facing the front end of the machine shell, of the concave cavity, the supporting legs support the machine shell and enable the end face of the front end of the machine shell to face the inclined upper portion. The dynamic strain gauge has the advantages that a worker can conveniently operate the dynamic strain gauge, and the worker does not need to bend down for a long time when operating the dynamic strain gauge.
Owner:YANGZHOU CHUANGLIAN MEASUREMENT & CONTROL EQUIP CO LTD
Variable circulation afterburner with outer culvert matched with oil supply and injection switching
The variable-circulation afterburner comprises a flow dividing ring and a flow blocking ring, the inner wall of the flow dividing ring protrudes towards the radial outer side to form an annular concave cavity, a radial injection opening is formed in the peripheral wall of the flow dividing ring, an axial injection opening is formed in the front wall of the concave cavity, and the radial injection opening is communicated with the axial injection opening. The multiple radial injection openings and the multiple axial injection openings are formed in the circumferential direction, and the radial injection openings and the axial injection openings are alternately formed or aligned in the circumferential direction. The flow blocking ring comprises a plurality of flow blocking ring radial windows and a plurality of flow blocking ring axial windows, the flow blocking ring can rotate in the circumferential direction relative to the flow dividing ring, the flow blocking ring can be switched between a flow blocking ring first state and a flow blocking ring second state, in the flow blocking ring first state, the flow blocking ring radial windows and the radial injection openings at least partially coincide, and in the flow blocking ring second state, the flow blocking ring radial windows and the flow blocking ring axial windows at least partially coincide. In the first state of the flow blocking ring, the axial injection opening is blocked by the flow blocking ring, in the second state of the flow blocking ring, the axial window of the flow blocking ring and the axial injection opening are at least partially overlapped, and the radial injection opening is blocked by the flow blocking ring.
Owner:TSINGHUA UNIVERSITY
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
Blister box for support packaging
ActiveCN223238548UShock-sensitive articlesContainers to prevent mechanical damageCollapsed cavityStructural engineering
The utility model discloses a blister box for support packaging, which comprises a box main body, an outer cover and a buffer base plate, the box main body is provided with a first lining, and the first lining is provided with a first concave cavity; the outer cover is provided with a second lining, the second lining is provided with a second concave cavity, the outer cover covers the box main body, a cavity is formed between the outer cover and the box main body, the outer cover is provided with a first air exhaust hole, and the second lining is provided with a second air exhaust hole; the buffer base plate is arranged between the first lining and the box main body; thus, through the design of all the components, the buffering base plate is used for reducing the influence of external shaking or collision on the blister box, the first air exhaust hole and the second air exhaust hole are matched, the air exhaust device is used for exhausting air in the cavity, the inner wall of the outer cover makes close contact with the outer wall of the box body, the assembly firmness between the outer cover and the box body is improved, practicability is high, and the blister box is suitable for being popularized and used. The application range is wide.
Owner:DONGGUAN ZHONGJIA INTEGRATED NEW MATERIAL TECH CO LTD
Construction Method for Solution Cavity Section of Long and Water-rich Karst Tunnel
The present invention discloses a construction method for the solution cavity section of a long and water-rich karst tunnel, which is divided into two cases: the treatment of large karst collapse cavities at the vault and the treatment of karst pipeline water. For the treatment of large karst collapse cavities at the vault, it includes the following steps: A1, advanced geological prediction; A2, advanced support for large karst collapse cavities; A3, excavation and support of the tunnel body. For the treatment of karst pipeline water at the vault, arch waist or side wall, it includes the following steps: B1, conduct observations for one quarter. If there is no water in the karst pipeline, use pumped concrete to seal the dry karst cave at this place; B2, then it is further divided into the water gushing from the karst pipeline on the left side of the tunnel and the water gushing from the karst pipeline on the right side of the tunnel, with different drainage structures. It can quickly carry out the treatment of solution cavities and water disasters, ensuring fast and efficient excavation and safe and reliable operation in the later stage.
Owner:中铁隧道集团一处有限公司 +2
Steel structure truss reinforcing device
The utility model discloses a steel structure truss reinforcing device, which belongs to the technical field of steel structure reinforcing devices and comprises a clamping seat with a U-shaped structure, and a clamping component is mounted in the clamping seat. By designing a group of adsorption fixing mechanism consisting of the telescopic column, the electromagnet, the spring and the button, the clamping plate moves under the action of the screw block in the process of connecting with the steel column so as to clamp the steel column, and in the clamping process, the electromagnet can extrude the telescopic column and the spring, so that the steel column is clamped. The electromagnet is electrified, the steel column can be attracted and fixed by the electromagnet through the performance of the material of the steel column, then the electromagnet and the steel column are connected, the mode does not need a bolt or welding mode, operation is convenient, the dismounting and mounting efficiency is high, and the dismounting and mounting efficiency is high. And the use performance of the device is effectively improved.
Owner:SINOHYDRO BUREAU 6 CO LTD
Local cavity design method for internal turning inlet cowl lip shock point thermal protection
The application relates to a local cavity design method for internal turning inlet lip point heat protection of a near space hypersonic aircraft. Given an internal contraction reference flow field and a captured inlet shape, an internal turning inlet lip profile is determined according to the intersection line of the reference flow field conical shock wave surface and the captured inlet shape; given an internal turning inlet lip bluntness section, a three-dimensional swept surface of the lip is obtained by sweeping along the internal turning inlet lip profile; the size of a local cavity of the internal turning inlet lip point is specified according to the internal turning inlet lip profile and the lip bluntness section; the swept curve of the internal turning inlet lip point area is reconstructed according to the size of the local cavity, and a local cavity front edge profile of the internal turning inlet lip point is generated; the three-dimensional surface of the internal turning inlet lip point area is reconstructed according to the local cavity front edge profile of the internal turning inlet lip point, and a three-dimensional bluntness lip of the internal turning inlet with the local cavity of the internal turning inlet lip point is generated.
Owner:XIAMEN UNIV
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
External structure power cable and manufacturing method thereof
The invention belongs to the technical field of electric power, and discloses a power cable with an external structure, which is provided with a central reinforcing piece, a plurality of loose tubes, a plurality of insulated wires and an outer protective layer, and is characterized in that the power cable is also provided with an accommodating part, the accommodating part is composed of an upper concave part and a lower convex part which are continuously distributed at intervals, the adjacent upper concave part and lower convex part are connected together, and the upper concave part and the lower convex part are connected together. An upper concave cavity with an upward opening is formed in the upper concave part, a lower convex cavity with a downward opening is formed in the lower convex part, the central reinforcing part is coated with the containing part, and the head end and the tail end of the containing part are combined; the loose tube is located in the lower convex cavity, the insulated wire is located in the upper concave cavity, and the outer protective layer wraps the containing part. The invention further discloses a manufacturing method. The circular pipe fitting has the main beneficial technical effects of simple structure, easiness in manufacturing, high manufacturing speed, higher space utilization rate, higher lateral pressure resistance, high construction efficiency, less material consumption, light self weight, low cost and better heat dissipation effect when the circular pipe fitting is circular and is used for a circular pipe.
Owner:CHANGSHU YUXING PHOTOELECTRIC TECH CO LTD