102results about How to "Ensure connection tightness" patented technology

A connecting arrangement for coolant lines includes a first coupling piece, connected seal-tight to a first line endpiece, and a second coupling piece, connected seal-tight to a second line endpiece. The coupling pieces each have radially extending sealing surfaces on the side facing toward the other coupling piece. A sealing ring is mounted between the sealing surfaces. The coupling pieces are joined to each other via a screw arranged laterally offset from the sealing surfaces so the line endpieces connect to each other via respective bores in the coupling pieces. A form body between the coupling pieces arranged at a spacing from the screw on the side facing away from the sealing surfaces is configured so a lever action occurs when the coupling pieces are joined to each other leading to a uniform pressing together of the sealing ring between the sealing surfaces of the coupling pieces.

The invention discloses an annular pipe reactor, comprising a straight sleeving pipe, an inner pipe and an outer pipe thereof, a jacketed communication pipe, a bend and an installation support. The end part of the bend is connected with the end of the inner pipe in series to form a reaction material communication flow channel. The jacketed communication pipe is arranged at the position of the bend, and is connected with a jacket flow channel which is formed between the inner pipe and the outer pipe in series to form a cooling communication flow channel. The installation support is arranged on the outer pipe. The bend is welded and sealed with the inner pipe to form an integrated structure, or one part of the bend is welded and sealed with the inner pipe and the other part of the bend is welded and sealed with the flange of the inner pipe to form an integrated structure, or one part of the bend is welded and sealed with the inner pipe and the other end of the bend is connected and sealed with the flange of the inner pipe to form an integrated structure. The connection of welding and sealing comprises the steps of firstly welding and arranging a concentric locating piece, and then welding and sealing the connection ends of the bend and the straight sleeving pipe at the outside of the end wall of the bend or at the outside of the end wall of the inner pipe. The annular pipe reactor meets the requirements of large-scale production and high productivity, and has the characteristics of good connecting tightness, high strength and good stability.

The invention discloses a device and a method for preparing a building structure based on 3D printing. The device comprises a 3D printing device and a steel bar loading device; the 3D printing devicecomprises a material storage cavity and a spray head which is connected with the material storage cavity and can move relative to a base frame; and the steel bar loading device is movably arranged relative to the base frame and is provided with a driving mechanism, wherein the driving mechanism drives short steel bars or short stripped bars to carry out inserting motion in the direction crossing the stacking direction of a cement-based paste layer, and the driving mechanism inserts the short steel bars or the short stripped bars into an interlayer interface which at least crosses over two adjacent layers of cement-based paste layers printed by the 3D printing device. No printing gap exists between the printed cement-based paste layers and the inserted steel bars, so that the connection tightness between cement paste and the steel bars is guaranteed, and the mechanical property and the toughness of the interlayer interface of 3D printed cement-based material are really improved.

The invention discloses a device for preparing a building structure based on 3D printing. The device comprises a 3D printing device and a steel bar loading device. The 3D printing device comprises a material storage cavity and a spray head which is connected with the material storage cavity and can move relative to a base frame; the steel bar loading device is movably arranged relative to the baseframe; the steel bar loading device comprises a cutting component, a feeding mechanism, and a driving mechanism, wherein the cutting component is used for cutting a long steel bar or a long strippedbar into short steel bars or short stripped bars, the feeding mechanism is used for feeding the long steel bar or the long stripped bar to a cutter head of the cutting component, and the driving mechanism is used for driving the short steel bars or the short stripped bars to carry out inserting motion in the direction crossing the stacking direction of a cement-based paste layer, and the driving mechanism inserts the short steel bars or the short stripped bars into an interlayer interface which at least crosses over two adjacent layers of cement-based paste layers printed by the 3D printing device. No printing gap exists between the printed cement-based paste layers and the inserted steel bars, so that the connection tightness between cement paste and the steel bars is guaranteed, and themechanical property and the toughness of the interlayer interface of 3D printed cement-based material are really improved.

The invention discloses a house building material insulation board capable of being conveniently assembled, and relates to the technical field of insulation boards. The house building material insulation board includes insulation board bodies, fireproof boards, horizontal connecting blocks and longitudinal connecting blocks, the tops of the insulation board bodies are fixed to the bottoms of the fireproof boards in a clamping mode, a horizontal mounting groove is formed in the right side of the bottom of each insulation board body, the inner surfaces of the horizontal mounting grooves are slidably connected with the outer surfaces of the horizontal connecting blocks, and a longitudinal mounting groove is formed in the front surface of the bottom of each insulation board body. According tothe house building material insulation board capable of being conveniently assembled, the horizontal connecting blocks and the longitudinal connecting blocks are used as connection hubs of the insulation board bodies to ensure the tight connection between the insulation board bodies, the insulation board bodies are directly fixed to an installation wall surface through bolts, and then threaded gaps are covered by the clamped fireproof boards, so that only the fixing bolts need to be tightened for installation, the fixing is simple, the disassembly is convenient, and the subsequent maintenancework is facilitated.

The invention mainly discloses a conveyance frame for hollow glass transferring. The conveyance frame for hollow glass transferring comprises a machine frame body and a glass supporting plate. The machine frame body comprises transverse support rods and horizontal support rods. The horizontal support rods are evenly arranged above the transverse support rods. The horizontal support rods comprise a limiting support rod, a first fixed support rod and a second fixed support, wherein the limiting support rod, the first fixed support rod and the second fixed support rod are sequentially arranged from front to back. A glass holding groove is formed between the limiting support rod and the first fixed support rod. The left end and the right end of the second fixed support rod are both provided with perpendicular stand rods. A supporting cross rod is arranged between the two perpendicular stand rods. At least two rows of glass limiting frames are arranged on the back side of the second fixed support rod. Each glass limiting frame is evenly provided with horizontal rollers. The conveyance frame for hollow glass transferring is high in practicability, simple in structural design and convenient and rapid to install and operate, actual assembly and disassembly are convenient, and actual carrying and conveyance are facilitated; and meanwhile, due to the additionally arranged glass limiting frames, the conveyance capacity of the conveyance frame can be increased, different types of glass can be independently placed , and follow-up differential treatment is facilitated.

The invention discloses a donkey-hide gelatin cake cutting machine. The donkey-hide gelatin cake cutting machine comprises a screw cap, a material pushing bar, a knife dish component, a material holding box, a machine body, foundations, a motor and a control switch, wherein a cover cap and a material pushing cavity are arranged on the screw cap, and an opening at the bottom of the screw cap is communicated with the knife dish component; the material pushing bar can be inserted into a hollow passageway of the material pushing cavity; the knife dish component is installed at the upper part of the machine body, and a cutting blade is horizontally installed in a weld knife dish and can rotate around a rotating shaft; the material holding box is movably arranged on one side of the machine body and is located below a discharge hole of the weld knife dish; the machine body provides installing bases for all the components; the foundations comprise a machine body foundation and an electronic control module installed on the machine body foundation; the motor is installed inside the machine body through a motor support and is connected to the rotating shaft of the cutting blade; the control switch controls start and stop of the motor. According to the donkey-hide gelatin cake cutting machine, quantitative cutting of the decocted donkey-hide gelatin cake barstock can be achieved, blanking is uniform and stable, bonding and damage of donkey-hide gelatin blocks can be avoided, appearance of a donkey-hide gelatin cake slice product is improved, convenience is brought to eating of a client, the situation that a finger accidentally touches the cutting blade from a material feeding opening is prevented, and thus the safety of operating personnel is guaranteed.

The invention belongs to the technical field of electrical equipment and particularly relates to a PCB (printed circuit board) signal unit shield grounding device. The PCB signal unit shield groundingdevice comprises a shielding case used for shielding PCB signal units, connecting pieces are arranged on the outer side of the shielding case, and after the PCB signal units are shielded by the shielding case, the connecting pieces contact with the inner wall of a cabinet shell provided with a PCB. The shielding case used for shielding the PCB signal units is arranged, the connecting pieces are arranged on the shielding case, and the PCB signal units are shielded and grounded, so that problems that PCB signal units are grounded badly leading to mutual interference in the prior art are solved,the PCB signal units are assuredly well grounded, good shielding effect is achieved, normal use of the PCB signal units and the PCB is guaranteed, and good use functions are achieved.

The invention provides a fabricated building external wall heat preservation device, and belongs to the technical field of building external wall heat preservation. The fabricated building external wall heat preservation device comprises a wall body, a second heat preservation wall plate and a first heat preservation wall plate, wherein the second heat preservation wall plate and the first heat preservation wall plate are connected to the side wall of the wall body through first bolts and distributed up and down; a first sealing assembly is movably mounted on the side, facing the second heat preservation wall plate, of the first heat preservation wall plate, and a second sealing assembly is movably mounted on the side, facing the first heat preservation wall plate, of the second heat preservation wall plate; and the first sealing assembly comprises a first concave cavity formed in the side wall of the first heat preservation wall plate and a first supporting plate connected into the first concave cavity through a first elastic body, and one end of the first supporting plate extends to the exterior of the first heat preservation wall plate and is fixedly provided with a first sealing layer. The fabricated building external wall heat preservation device has the advantages of convenient mounting and good heat preservation effect, compared with the prior art, a gap between the adjacent heat preservation wall plates can be reduced to a great extent, and thus the situation that heat in a building body is lost from the position between the two adjacent sets of heat preservation wall plates is avoided.

The invention provides a flexible printed circuit board, comprising a first side and a second side which are arranged face to face, wherein the first side is provided with at least one first bonding pad; the second side is provided with at least one second bonding pad corresponding to the at least one first bonding pad; a tin guiding channel is formed between each first bonding pad and the corresponding second bonding pad, the tin guiding channel is formed in the flexible printed circuit board and communicates the first bonding pad and the corresponding second bonding pad, and the center distance between the first bonding pad and the corresponding second bonding pad which are communicated by the tin guiding channel is a preset numerical value. According to the flexible printed circuit board provided by the invention, the tin guiding channel is used for connecting each first bonding pad and the corresponding second bonding pad together; by virtue of the circulating function of the tin guiding channel, soldering tin can flow from the first bonding pad to the surface of the second bonding pad and therefore a lot of soldering tin can be attached to the surfaces of the first bonding pad and the second bonding pad and further the first bonding pad or the second bonding pad can be prevented from falling off from the flexible printed circuit board. In addition, the invention further provides a mobile terminal comprising the flexible printed circuit board.

The invention discloses a mounting rack for an integrated cooker fan. The mounting rack comprises a base and an arc-shaped clamping seat, the arc-shaped clamping seat is arranged on the base, the arc-shaped clamping seat comprises a bottom support and an arc-shaped frame, and the arc-shaped frame is located in the bottom support. A mounting method comprises the following steps that 1) the arc-shaped clamping seat is mounted; 2) the arc-shaped clamping seat and the base are mounted; 3) a motor supporting part and an air inlet pipe supporting part are mounted; and 4) the fan and the mounting rack are mounted. According to the mounting rack for the integrated cooker fan, mounting and fixing between the mounting rack and the inner wall of an integrated cooker are realized through the base, thearc-shaped clamping seat can be used for clamping and fixing a turbine casing on the fan, meanwhile, a motor on the fan is supported through the motor supporting part, and then an air inlet pipe on the fan is supported by using the air inlet pipe supporting part, so that the mounting firmness and reliability between the whole fan and the mounting rack are effectively guaranteed, the structural stability of the integrated cooker is improved, moreover, the angle of an air outlet pipe can be adjusted according to the actual position of an air duct pipe in the integrated cooker after the fan is mounted on the arc-shaped clamping seat.

The invention discloses a data transmission structure for mathematical algorithm storage equipment based on a graph theory, and specifically relates to the technical field of data transmission. The data transmission structure comprises a data transmission structure body, wherein the two sides of the data transmission structure body are integrally connected with data interfaces, the two sides of the top part and the bottom part of the data transmission structure body are fixedly connected with heat dissipation shells; a plurality of heat conduction copper columns are fixedly connected to innercavities of the heat dissipation shells, a plurality of heat conduction pieces are fixedly connected to the outer side walls of the heat conduction copper columns, a clamping base is fixedly connectedto one side of the data transmission structure body, first sliding sleeves are embedded in the two sides of the inner cavity of the clamping base, and first sliding rods are slidably connected into the first sliding sleeves. By arranging the clamping base and the heat dissipation shells, compared with the prior art, the tightness of data interface connection is effectively improved, the fixing safety of the data transmission structure body during data transmission is guaranteed, heat accumulated during work is effectively dissipated, and the service life of the data transmission structure body is guaranteed.

The invention belongs to the technical field of building construction, and particularly relates to a base section sinking well with a waterproof structure. A plurality of protrusions are arranged on a cast base plate of a well wall inside the base section sinking well, the protrusions horizontally stretch towards the inner side of the base section sinking well along the radial plane of the base section sinking well, a waterstop is buried in the protrusions in advance, one end of the waterstop stretches into the protrusions and is fixedly connected with an internally-arranged steel plate in the protrusions, the other end o the waterstop stretches out of the outer sides of the protrusions, when the well wall of the sinking well and the base plate are cast for the second time, a bracket and the base plate are cast integrally, meanwhile, a waterstop on the bracket is also cast in the base plate, and due to the waterproof structure, the integrality of the bottom section sinking well and the base plate is greatly enhanced, and the waterproof effect of the base section sinking well and the base plate is greatly improved. Compared with an original sinking well structure, the base section sinking well with the waterproof structure is simple in structure, good in waterproof effect, and good in economical efficiency, and is easily cast and formed.

The invention relates to a stage dynamic separation device for a hypersonic wind tunnel model and an application thereof. The stage dynamic separation device comprises an outer sleeve, a piston rod arranged in the outer sleeve, a cylinder driving device arranged at one end of the piston rod and used for driving the piston rod to reciprocate in an axial direction, and a crank connecting rod mechanism arranged at the other end of the piston rod. The crank connecting rod mechanism comprises two crank connecting rod parts which are oppositely arranged. The crank connecting rod part comprises a crank and a connecting rod connected with each other. one end of the connecting rod is connected to the piston rod, and one end of the crank is connected to the outer sleeve. The cylinder driving devicedrives the crank connecting rod mechanism to expand toward the periphery of the crank connecting rod mechanism or to contract toward the middle of the crank connecting rod mechanism by driving the piston rod to reciprocate in the axial direction. The separation device of the invention has the advantages of high separation speed, high reliability, and high use efficiency, and does not interfere with the process of free movement of the separator stage model in the flow field after separation.

The invention discloses an electronic cigarette blowing unlocking device and method. The device comprises an unlocking shell, damping springs, a microphone assembly, a connecting ring, an electric connecting groove, a second fastening spring, an indicator light bar, a fastening block, a connecting column and an electric connecting block, a first fixing lug is arranged on the inner wall of the unlocking shell, the first fixing lug is hinged to a first damping block, and the side, away from the first fixing lug, of the first damping block is provided with a damping support rod. According to the invention, vibration generated in the using process is buffered through the arranged damping springs, the connection tightness in the device is ensured, and therefore the working stability of the device is improved; blowing unlocking of an electronic cigarette is achieved through the microphone assembly, an extra key switch does not need to be added, the machining difficulty is reduced, and the economic benefit of a product is improved; and the unlocking device is merged into an operation circuit of the electronic cigarette through mutual cooperation of the electric connecting block and the connecting column, disassembly and assembly are convenient, and the labor intensity of maintenance is reduced.

The invention discloses a feeding device for metal nano-powder production, and relates to the field of metal nano-powder production equipment. The feeding device comprises a box body, a box cover is hinged to the top of the box body, a material storage mechanism is arranged in the box body, a discharge pipe is arranged at the bottom of the box body, the upper end of the discharge pipe extends intothe box body and is connected with a material storage mechanism, the material storage mechanism comprises a plurality of disc-shaped storage devices which are vertically stacked in the box body, thedisc-shaped storage device comprises a tray, a connecting shaft is coaxially arranged in the middle of the tray, a bulge is arranged at the upper end of the connecting shaft, a clamping groove matchedwith the bulge is formed in the bottom of the connecting shaft, a rotating gear disc is coaxially arranged on the connecting shaft, a driving motor is arranged on the tray, a driving motor is connected with the driving gear, leakage holes are uniformly formed in the upper end surface of the rotating gear disc around the shaft, a hopper is arranged at the position, corresponding to the material leaking hole, of the rotating gear disc, a baffle is hinged to the bottom of the hopper, a leaking plate hole is formed in the position, corresponding to the baffle, of the tray, leaking plate hole is communicated with the top of the discharging pipe, and has the advantages of being capable of continuously feeding materials and high in production efficiency.

The invention discloses a wind power ring blank capable of reducing stress concentration and a preparation process thereof. An inner sleeve is connected with the inner wall of a ring body in an interference fit mode, so that the assembled wind power ring blank is connected more tightly, positioning holes are matched with first threaded holes, locking bolts installed at the positioning holes guarantee the connection tightness of the wind power ring blank and can effectively reduce stress concentration, when the wind power ring blank is prepared, the ring body and an inner sleeve blank are prepared firstly, then rough turning is conducted on the ring body and the inner sleeve blank, hardening and tempering are conducted, then finish machining is carried out, stress relief annealing is performed on the inner sleeve blank, stress relief annealing can relieve stress and ensure the hardness of the inner sleeve, then, natural cooling and assembly of the inner sleeve are carried out, the windpower ring blank is connected more tightly through interference fit, and the whole wind power ring blank has obviously reduced stress concentration phenomenon and high strength as compared with traditional parts after installation; and meanwhile, the preparation process of the wind power ring blank is relatively simple.

The invention provides a steel structure building wallboard unit structure easy to assemble. The steel structure building wallboard unit structure comprises a mounting underframe, a connecting column, an upper gland, upper positioning grooves and lower positioning grooves, wherein walls are fixedly connected to the upper portion of the mounting underframe, and the lower surfaces of the walls are located in a mounting underframe groove; the connecting column is movably connected between the two sets of walls; the upper positioning grooves are formed in the left sides and the right sides of the upper surfaces of the walls correspondingly in two positions; the upper gland is fixedly connected to the upper portions of the upper positioning grooves through screws; the lower positioning grooves are formed in the lower surfaces of the walls; the mounting underframe is an arched groove body, and a lower reinforcing block of a trapezoidal structure is connected to the upper surface of the mounting underframe in a welded mode; and a lower fixing hole is formed in front of the lower reinforcing block and is an internal threaded hole. Therefore, the connecting mode of the spliced walls is improved, a middle connecting mechanism is improved, and the problems of stress concentration and insufficient airtightness of the wall connecting positions are reduced while the connecting strength is ensured.

The invention discloses a device and a method for preparing a building structure based on 3D printing. The device comprises a 3D printing device and a steel bar loading device; the 3D printing devicecomprises a material storage cavity and a spray head which is connected with the material storage cavity and can move relative to a base frame; the steel bar loading device comprises a temporary storage mechanism, a filling mechanism and a driving mechanism, wherein the temporary storage mechanism is used for storing short steel bars or short stripped bars, the filling mechanism is used for filling the short steel bars or the short stripped bars into the temporary storage mechanism, the driving mechanism is used for driving the short steel bars or the short stripped bars at the discharge portof the temporary storage mechanism to carry out inserting motion in the direction crossing the stacking direction of a cement-based paste layer, and the driving mechanism inserts the short steel barsor the short stripped bars into an interlayer interface which at least crosses over two adjacent layers of cement-based paste layers printed by the 3D printing device. No printing gap exists betweenthe printed cement-based paste layers and the inserted steel bars, so that the connection tightness between cement paste and the steel bars is guaranteed, and the mechanical property and the toughnessof the interlayer interface of 3D printed cement-based material are really improved.

The invention relates to the technical field of speed reducer installing and positioning, and discloses a speed reducer installing and positioning device facilitating shaft alignment. The speed reducer installing and positioning device comprises a fixing plate, a clamping base is arranged on the inner wall of the fixing plate, a rotating shaft is fixedly installed in the fixing plate, and a rotating plate is movably installed on the outer wall of the rotating shaft. a magnet is fixedly installed inside a clamping base, and the inner wall of the rotating plate is fixedly connected to a spring. By slightly rotating the rotating shaft, when the magnet in a circular ring is aligned with the magnet in the clamping base, when the magnet is not aligned with the magnet in the clamping base, the attraction force between the two magnets can be blocked under the action of a baffle, after the rotating shaft is aligned with the fixing plate, under the action of the magnets, the circular ring expands towards the outer side, an air bag pushes the circular ring on the outer side to expand, an ejector rod ejects the rotating plate, the rotating plate enters the clamping base, the rotating shaft and the fixing plate move synchronously, and the effect of precise butt joint of the rotating shaft of the speed reducer is achieved.

The invention provides a packaging mechanism and a packaging method for a semiconductor substrate, belongs to the technical field of semiconductor substrate packaging structures, and aims to solve the problems that in the packaging process of the semiconductor substrate in the prior art, the packaging structure cannot be adjusted with internal semiconductor components, chips and substrates, a sealing assembly which is tightly connected with a semiconductor substrate deforms and loosens along with the prolonging of the service time, the interior of a packaging structure is lack of a tightness adjusting structure, and the tightly packaged semiconductor substrate loosens along with the prolonging of the service time. The packaging mechanism comprises a packaging seat; a semiconductor electrical substrate is fixedly connected to the middle of the interior of the packaging seat, and the packaging seat comprises a side wall positioning frame; the two ends of a buffer pressing layer are connected to the two side walls of the packaging base through gluing. A substrate and a base can be prevented from being loose in connection during long-term use, simple reinforcement can be performed, and the connection tightness between the semiconductor substrate and the base can be maintained.

The invention discloses a manufacturing method of a high-flame-resistant, low-emission, green and environmentally-friendly cable. The method comprises the following steps: (1) material selection; (2)wire drawing; (3) conductor or conductor twisting; (4) extruded insulation; (5) irradiation crosslinking; (6) cabling; (7) oxygen barrier extrusion; (8) armoring; (9) lapping; (10) outer sheath extrusion; (11) product performance detection; and (12) finished product packaging and storage. The cable manufactured by the invention overcomes the disadvantages that halogen-containing series flame-resistant electric wires and cables are high in smoke generation and high in toxicity, and also solves the problem that halogen-free series flame-resistant electric wires and cables cannot reach the specifications of new edition of 'civil architectural electrical design code', so that the flame resistant level of the cable can reach level A, the combustion performance reaches level B1, the smoke toxicity reaches level t0, the combustion dripping / particle level reaches level d0, the corrosion performance level also can reach level a1, and the cable can be widely used in civil architectures.

The invention discloses a movement-facilitating gantry type filter press, and relates to the technical field of filter presses. The movement-facilitating gantry type filter press comprises a machine body, wherein a push handle is fixedly mounted on one side of the machine body; four vibration absorption sleeves are arranged at the bottom of the machine body; first springs are arranged in the vibration absorption sleeves; one end of each first spring is fixedly connected with the bottom of the machine body, and the other end of the first spring is fixedly connected with a lifting plate; the sides, backing onto the first springs, of the lifting plates are movably connected with ball shafts. According to the movement-facilitating gantry type filter press disclosed by the invention, by the arrangement of the first springs in the vibration absorption sleeves and cooperative arrangement of the lifting plates, the ball shafts and a stable frame, a vibration absorption effect is achieved in amoving process of the gantry type filter press; by insertion of bolts into fixed sleeves and fixed rods and fixed cooperative arrangement of the bolts by screw caps, the stability of a lower structureof the gantry type filter press can be effectively improved.

The invention relates to an anti-seismic foundation applied to a subway. The anti-seismic foundation comprises an anti-seismic pillar, a bearing table foundation, steel fiber reinforced concrete, anti-seismic spring steel pieces, steel piece embedded parts, anti-seismic outer rigid cylinders, anti-seismic interior rigid cylinders, bearing table stressed ribs, bearing table frame vertical ribs, bearing table distributed ribs, vertical tie bars and oblique tie bars. The anti-seismic pillar stretches in the bearing table foundation. The anti-seismic spring steel pieces are arranged on the periphery of the anti-seismic pillar from top to bottom. The anti-seismic spring steel pieces are connected with the bearing table foundation and the end portion of the anti-seismic pillar through the steelpiece embedded parts. The outer sides of the steel piece embedded parts are provided with the anti-seismic outer rigid cylinders, and the steel piece embedded parts, the anti-seismic outer rigid cylinders and the anti-seismic interior rigid cylinders are of an integrated structure. The anti-seismic foundation has the beneficial effects that the anti-seismic spring steel pieces high in elastic limit and high in fatigue strength are arranged, and the effects of resisting earthquakes and eliminating energy are improved in the subway movement process of the foundation.

The invention discloses a UHPC precast arched girder combined type aqueduct. The UHPC precast arched girder combined type aqueduct comprises an arched structure and an aqueduct main body, wherein endribs of the aqueduct main body are hinged with the top end of the arched structure; the aqueduct main body comprises a plurality of sections of precast slot bodies; a wet jointing structure is arranged between every two adjacent precast slot bodies; the wet jointing structure comprises reinforcing steel bars and ultrahigh-performance concrete layers; the fixed ends of the reinforcing steel bars are fixedly connected to the precast slot bodies; exposed ends of the reinforcing steel bars are connected to the ultrahigh-performance concrete layers; and the bottoms of the ultrahigh-performance concrete layers are connected to the top end of the arched structure. The stress characteristics of the arched girder combined type aqueduct structure are sufficiently utilized, high-strength ultrahigh-performance concrete is adopted, applicable span is 150-500 m, applicable span of the conventional concrete girder arched combined type aqueduct is 50-120m which is 3-4 times that of a conventional arched girder type aqueduct.

The invention discloses a multi-pipe connected confluence device. The device comprises a confluence joint, wherein an outgoing pipe is arranged on the bottom surface of the confluence joint; connecting pipes are arranged on the four side walls of the confluence joint; each end part of the four connecting pipes is connected with an incoming pipe; the incoming pipe is connected with the connecting pipe through a rotating cylinder; one end of the rotating cylinder is screwed with the connecting pipe; the other end of the rotating cylinder is clamped with the incoming pipe; and the rotating cylinder comprises a left semi-arc cylinder and a right semi-arc cylinder. The device has the advantages that the structure is simple, the practicability is high; according to the multi-pipe connected confluence device, the butt joint between the pipelines and the main pipeline is simpler; the butt joint between the pipelines at different angles and the main pipeline can be realized through one confluence device; the connecting difficulty between the pipelines and the main pipeline is effectively simplified; and meanwhile, the confluence device can play a certain buffering role, so that the impact strength of the water flow which flows into the main pipeline is buffered to a certain extent.