48results about How to "Fill up quickly" patented technology

The invention discloses a high-speed photocuring 3D printing device and method. The device comprises a liquid pool filled with liquid photosensitive resin, a printing platform and a radiation source. A transparent plate corresponding to the printing platform and the radiation source is arranged at the bottom of the liquid pool. The side, facing the printing platform, of the transparent plate is covered with a transparent anti-bonding coating. The device further comprises a liquid outlet and a liquid inlet which are formed in the side wall of the liquid pool, a pipeline connecting the liquid outlet and the liquid inlet, and a drive unit which is arranged on the pipeline and used for driving the liquid photosensitive resin to flow among the liquid outlet, the liquid inlet and the pipeline. A curing window is coated with the transparent anti-bonding coating, and therefore the problem that the curing photosensitive resin is bonded and attached to a glass plate due to excessively fast laser radiation is avoided. Pipelines promoting flowing of the liquid photosensitive resin are arranged on the two sides of a printing area, the mobility of the photosensitive resin near the printing area is improved, supplementing of the photosensitive resin is accelerated, and rapid printing of the SLA is achieved.

This invention refers to a warp sizing craftwork to fabric in weave industry. A direct processing warp sizing method used amylum latex includes brewage serosity and warp sizing steps. Its trait is 1) Brewage serosity, (1) the stuff selection, prepare, the stuff include amylum, polypropylene and exterior activator, the polypropylene is 1~10% of amylum dry weight, the exterior activator is 0.1~5% of stuff weight. (2) Serosity brewage. First, immit 3-5 times water of amylum bulk, then immit amylum to the conditioning, beat up enough to suspended latex. 2) Warp sizing. The warp dip the amylum latex of above slash box, the sizing let the amylum grain absorb yarn. The slash box keep the temperature of 20~35oC, the warp after sizing is through cylinder, felt the amylum paste on the fiber, meanwhile, realize sizing. This invention reduces the cost of sizing.

The invention relates to a zero-halogen low-smoke flame-retardant injection molding material for a branch cable and preparation as well as application thereof. The zero-halogen low-smoke flame-retardant injection molding material comprises the main raw materials of zero-halogen polyolefine resin, compatilizer, phosphonitryl flame retardant, inorganic flame retardant, flame-retardant synergist, smoke suppressor, processing lubricant, antioxidant and ultraviolet-resistant master batch. The material does not contain halogen element, and has higher breaking elongation, oxygen index and volume resistivity and excellent fluidity; a large-sized mould can be quickly filled at the temperature of 150-170 DEG C; an injection molding product has a smooth surface; and the material is particularly suitable for preparing a zero-halogen branch connector for the branch cable.

The invention discloses a semi coke waste heat recovery type spiral conveyer, and belongs to the field of semi coke processing equipment. An inner cylinder body includes two or more inner cylinder body sections, a feeding port is communicated with the upper side at the conveying starting end of each inner cylinder body section, and a discharging port (15) is communicated with the lower side at the tail end of the last inner cylinder body section; the volume defined by a pitch screw blade of the N+1th inner cylinder body section, the external circular surface of a spiral base tube (7) and the internal circular surface of the N+1th inner cylinder body section is (N+1) / N plus or minus 1 / 5N times of the volume defined by a pitch screw blade inside the Nth inner cylinder body section, the external circular surface of the spiral base tube (7) and the internal circular surface of the Nth inner cylinder body section, wherein the N is an integer not smaller than 1 and not greater than 5. According to the invention, the fact that after semi coke inside the inner cylinder body section on the front side enters the inner cylinder body section on the rear side, semi coke at the feeding port of the inner cylinder body section on the rear side enters the inner cylinder body section on the rear side, and all the inner cylinder body sections are filled with material exactly is guaranteed, so that filled conveying is realized, and danger of gas leakage can be effectively avoided.

The invention discloses a technology for embedding metal into blue and white porcelain. The technology comprises the following steps: (1) sketching blue and white patterns and metal patterns on a manufactured porcelain body, digging ink mark slots along the ink marks of the metal patterns, then putting the porcelain body into a kiln and firing for the first time; (2) coloring the blue and white patterns, then putting the porcelain body into the kiln and firing for the second time; (3) enabling the bottom surfaces and the walls of the ink mark slots to be evenly coated with white vaseline, enabling the metal to be melted, pouring the melted metal into the ink mark slots, enabling the melted metal to be solidified, grinding and leveling; and (4) spraying clear glaze onto the porcelain body, then putting the porcelain body into the kiln and firing for the third time. According to the technology, the porcelain body is fired for three times, so that the blue and white patterns can fully present colors, and better metallic luster is realized; the metal and the porcelain are combined into a whole, so that the product not only has the freshness and beauty of the blue and white porcelain, but also is endowed with the grave and deep feeling of the metal; and therefore, the artistic value and the commercial value of the product are greatly improved.

The invention relates to the technical field of impeller machining, in particular to a closed impeller electric spark machining device and machining method. The closed impeller electric spark machining device comprises an impeller installation fixture for installing a closed impeller to be machined, a pre-machining electrode installation fixture and a plurality of pre-machining electrodes; the impeller installation fixture is provided with an installation shaft, the closed impeller to be machined is provided with a center positioning hole, and the closed impeller to be machined sleeves the installation shaft through the center positioning hole; the electrode installation fixture comprises a first electrode installation seat, the multiple pre-machining electrodes are all connected with the first electrode installation seat and arranged circumferentially, and the number of the pre-machining electrodes is the same as that of flow channels of the closed impeller to be machined; in the machining process, each pre-machining electrode corresponds to a flow channel inlet of the closed impeller to be machined; and the closed impeller electric spark machining device furthermore comprises a first drive mechanism for driving the electrode installation fixture to perform straight line movement in the Z-axis direction, and the Z axis is the extension direction of the installation shaft. By means of the closed impeller electric spark machining device and machining method, machining efficiency is improved, and machining precision is guaranteed.

The invention discloses a self-repairing type heat insulation wallboard with a crack reminding function, and belongs to the technical field of heat insulation wallboards. The self-repairing type heat insulation wallboard with the crack reminding function comprises a wall body, a liquid storage cavity is formed in the wall body, a plurality of evenly-distributed conveying pipes are inserted into the wall body, and the conveying pipes penetrate through the liquid storage cavity; supporting partition plates are fixedly connected to the parts, in front of the interior of the liquid storage cavity, of the conveying pipes, and outer wall cracks of the wall body can be self-repaired; foaming agents are sprayed out of the wall according to the principle that the foaming agents expand when encountering air, and the outer wall cracks are rapidly filled; and meanwhile, the inner wall corresponding to the outer wall cracks generates a series of changes, people can be reminded of the condition of the outer wall, people can conveniently observe and maintain the specific position of the cracks, people can further trim the outer wall cracks more timely, the maintenance cost is effectively reduced, and the service life of the outer wall is remarkably prolonged.

The invention discloses a connecting piece with a cavity sectional material, and solves the defects that the connection of a connecting structure between the existing horizontal sectional material and the vertical sectional material is not firm and the water-proof property is poor. According to the technical scheme, the connecting piece provided by the invention is of a block shape, the outer shape of the connecting piece is matched with a cavity of the sectional material, so that the connecting piece is conveniently placed in the cavity, and the connecting piece comprises at least one inserting surface and a bonding surface which is perpendicular to the inserting surface. The connecting piece provided by the invention has the advantages that the block-shaped connecting piece arranged in the cavity of the horizontal sectional material is used for changing the line connection of a gluing position arranged among the sectional materials into surface connection, the connecting strength is effectively improved, a glue is subjected to extrusion so as to flow from inside to outside so as to rapidly and effectively fill a gap caused by the lower machining precision or sectional material specific structure requirement, the gap after solidifying is blocked, and the waterproof property is good.

The invention belongs to the technical field of tunnel waterproofness and impermeability, and provides a tunnel grouting process in a salt rock stratum. The tunnel grouting process in the salt rock stratum comprises the steps that grouting holes are formed, specifically, the grouting holes are formed in the periphery of a tunnel hole, and anti-corrosion grouting pipes are embedded; slurry is prepared, specifically, ordinary cement slurry and ultra-fine cement slurry are prepared with brine of certain concentration; the slurry is grouted, specifically, when the underground water volume is linear strand water or above, the ordinary cement slurry and the ultra-fine cement slurry are sequentially grouted; and when the underground water volume is drip water or below, the ultra-fine cement slurry is grouted. According to the tunnel grouting process, salt rocks are not dissolved in the grouting process, meanwhile the surrounding rock cracks can be effectively blocked, an effective sealing ring can be formed, the salt rock is prevented from being dissolved by underground water, and the intrusion of underground salt water into the tunnel structure is prevented.

The invention provides an automatic bonding device for a full mold casting, and belongs to the technical field of full mold casting bonding. The problem that irregular full mold casting bonding facesare difficult to be rapidly coated with hot glue for bonding is solved. The device comprises a base, universal brake trundles are fixed to the lower ends of four supporting legs of the base, a controlbox is fixed to the front end of the base, the side end of the base is fixedly provided with a glue injection mounting plate, a second adjusting sliding rail is fixed to the glue injection mounting plate, a glue injection mechanism is arranged on the second adjusting sliding rail, two first adjusting sliding rails are fixed to a bottom plate in the base, and are symmetrically distributed, rotating clamping mechanisms are arranged in the first adjusting sliding rails in a sliding manner, and adjusting push rods are arranged between the rotating clamping mechanisms and the base. Through cooperation of the rotating clamping mechanisms and the adjusting push rods, the full mold casting is clamped and driven to move, the irregular bonding face moves at the lower end of a glue outlet of a hot melt adhesive gun, the bonding face can be rapidly coated with the hot glue fully, and the application range is wide.

The embodiment of the application discloses a brushing and writing performance optimization method, which comprises the following steps: firstly, a storage system receives a write IO sent by an upperlayer module through a lower layer module; if the number of the write IO reaches a first preset value, a corresponding number of threads on the basis of the existing threads is increased to obtain a first number of threads, and the threads are used for processing the write IO; and then it is judged whether the number of the write IO matches the adjusted number of threads; if the number of write IOs matches the adjusted number of threads, the write IO is executed to achieve data writing. The present application can dynamically adjust the number of threads by judging the number of IO so that thenumber of IO and the number of threads are always kept in an ideal state, thereby improving the efficiency of data writing.

The invention relates to the technical field of mobile phone additional equipment, in particular to a multifunctional flip phone shell and a working principle thereof. The multifunctional flip phone shell comprises a front shell, a rear shell, an inner shell, a display window, an answer and refusing frame, a wallet, a handwriting board device, a protection device, a button battery jar and a buttonbattery, wherein the front shell and the rear shell are connected into a whole; the inner shell is connected to the front of the rear shell; the display window and the answer and refusing frame are embedded into a front shell body; the wallet is located between the display window and the answer and refusing frame; the handwriting board device is arranged on the back surface of the rear shell; theprotection device is embedded into an inner shell body; the button battery jar is arranged in the handwriting board device and the protection device; and the button battery is located in the button battery jar. The multifunctional flip phone shell is attractive in appearance and complete in function, data can be recorded and stored at any time and any place through the handwriting board device, amobile phone screen can be effectively protected through a safety air bag, and meanwhile, the mobile phone shell adopts the design of the anti-gravity and the wallet, so that people can make the hands free anytime and anywhere and go out simplely.

The invention discloses a siphoning principle based low-water-level water closet. The siphoning principle based low-water-level water closet comprises a water closet main body and a water tank, wherein the upper end of the water closet main body and the upper end of the water tank are located in the same plane, the water closet main body comprises a toilet bowl and a blow-off pipe, the lower end of the water tank is connected with the lower end of the toilet bowl through a washing pipe, the blow-off pipe is also connected to the lower end of the toilet bowl, the upper end of the toilet bowl isconnected with a circle of flushing inner culvert, the flushing inner culvert is connected to the water tank through a flushing pipe, and a circle of flushing holes are formed in the inner side of the flushing inner culvert, have angles of 45 degrees and face to the toilet bowl. The siphoning principle based low-water-level water closet has the advantages that in accordance with difference of height of positions I, II and III and the principle of physics, a siphoning effect can be formed; a flushing port is high in water volume and high in pressure, thus, the siphoning force will be very large, and dirt can be removed in shortest time; the flushing holes directly act on the blow-off pipe from a drainage valve, thus, the siphoning effect is better provided, and the effect of scouring manure is improved; the water tank is globally level with the water closet, so that the water closet looks attractive, and materials and space are saved.

The invention relates to the field of engine assemblies, in particular to a filter. The filter comprises a filter tank, a filter element, a middle pipe and a first one-way valve, wherein a filter cavity is arranged in the filter tank; an oil inlet and an oil outlet communicating with the filter cavity are formed in the filter tank; the filter element is arranged in the filter cavity; an installation hole is formed in the filter element; an oil guiding channel is arranged in the middle pipe; the middle pipe is partially located in the installation hole; one end of the bottom part is in seal connection with the filter tank; a through hole is formed in one end of the top part of the middle pipe; two ends of the through hole communicate with the filter cavity and the oil guiding channel; the oil guiding channel communicates with the oil outlet, so that engine oil in the filter tank can be only discharged from the oil outlet through the through hole in the top part of the middle pipe; the first one-way valve is arranged on the oil inlet; the engine oil can enter the filter cavity through the first one-way valve so as not to backflow to an oil pan after the engine is stopped; and by combining the middle pipe, the engine oil located under the through hole in the filter tank cannot be discharged after the engine is stopped, and the engine oil in the filter tank is quickly fully filledwhen the engine is started again, so that the lubrication of a moving part is ensured.

The invention discloses an RCLED lamp bead packaging process, which comprises the following steps of dispensing solid crystal glue, mounting a chip, baking, welding a bonding wire, dispensing a first layer of anti-reflection glue, baking, dispensing a second layer of anti-reflection glue, baking and testing. The anti-reflection glue is dispensed in a corresponding area of an RCLED lamp bead, so that a part capable of reflecting light in the RCLED lamp bead is shielded; the reflection effect of the RCLED lamp bead is effectively eliminated, the light spot emitting effect of the RCLED lamp bead is improved, and the light spots are clearer and more accurate. And the viscosity of the first layer of anti-reflection glue has certain flowability, so that the anti-reflection glue can be rapidly filled in a specified area, and the production efficiency is high. And the second layer of anti-reflection glue is relatively high in viscosity and flows slowly after glue dispensing, so that the glue dispensing precision is improved, and the anti-reflection glue can be effectively prevented from shielding a light-emitting hole of the RCLED chip. When the bonding wire is welded, the support is the first welding spot, and the PAD of the RCLED chip is the second welding spot, so that the radian of the bonding wire is lower, the lamp bead has a good appearance, the dispensing amount is reduced, and the production cost is saved.

The invention discloses power generation glass for photovoltaic building integration and a preparation method of the power generation glass. The power generation glass sequentially comprises an anti-reflection film coating, a first glass substrate layer, a first adhesive film, a second glass substrate layer, a transparent conductive film, an absorption layer, a back contact layer, a back electrodelayer, a second adhesive film and a back plate glass layer from bottom to top; the absorption layer is made of cadmium telluride; and the heat insulation capacity and the sound insulation performanceof the power generation glass are improved, and the maximum power stabilization time of the power generation glass is shortened.

The invention belongs to the technical field of NMP production, and particularly relates to an NMP synthesis device which comprises a GBL head tank, a monomethylamine head tank, a reactor, a GBL metering pump, a monomethylamine metering pump and a static mixer. The reactor comprises a coil pipe and a shell, the coil pipe is fixedly arranged in the shell, and a gap is formed between the coil pipe and the shell. A GBL raw material is introduced into the GBL head tank and then conveyed into the static mixer through the GBL metering pump, the static mixer feeds fully mixed GBL and monomethylamine into the coil pipe, heat conduction oil with a set temperature is added from an oil inlet of the shell, the gap between the coil pipe and the shell is filled with the heat conduction oil, the coil pipe is heated, and the GBL and monomethylamine react in the coil pipe to generate NMP. According to the scheme, high-purity monomethylamine is adopted to prepare NMP, so that separation of a finished product and water after reaction is reduced, and the operation cost is reduced; and water entering the coil pipe is reduced, heat loss is reduced, meanwhile, the contact area of monomethylamine and GBL is enlarged, and the reaction speed is increased.

The invention discloses a foundation pit pre-embedded type double-liquid grouting leaking stoppage device. The device comprises a preset hole formed in an original soil layer and close to a water stop wall, a containing groove is formed in the top of the preset hole, a containing plate is connected into the containing groove, a mounting groove is formed in the containing plate, a mounting plate is connected into the mounting groove, and the mounting plate is arranged in the mounting groove, mounting holes are formed in the two sides of the mounting plate, connecting mechanisms used for fixing the mounting plate to the containing plate are arranged in the mounting holes, an opening is formed in the middle of the mounting plate, a second mounting frame located above the opening is fixed to the upper end of the mounting plate, and two connecting sleeves are rotationally connected to the lower end of the second mounting frame; the lower ends of the two connecting sleeves are fixedly sleeved with a cement paste pipe and a water glass pipe correspondingly. The device has the effects of rapidly filling the collapsed position and preventing the ground of the original soil layer from collapsing, and the cement paste and the water glass are mixed more uniformly, so that the mixed condensation filling effect is improved.

The invention discloses a novel heating furnace for high-molecular plastic optical fiber drawing equipment. The novel heating furnace structurally comprises a driving motor, a chain mechanism, a feeding hopper, a heating mechanism, a wire drawing device, a controller, an access door and an assembling support. According to the novel heating furnace for the high-molecular plastic optical fiber drawing equipment, a reciprocating mechanism is driven by a driving shaft to move back and forth, and at this time raw materials in the moving area is cut and crushed quickly, so that the situation that the clotted raw materials enter the interior of a thread splitting assembly so as to cause blockage is avoided; in addition, fiber filaments are produced by the thread splitting assembly through a plurality of thread drawing holes, and the bonded fiber filaments can be subjected to falling treatment in cooperation with vibration; and finally, the fiber filaments can be subjected to convex flatteningand concave filling repairing through cooperation between a flattening scraper and an arc-shaped wiping mouth, so that the brightness of the fiber filaments is greatly improved, the problem of bonding in the later collection work is avoided, and the quality of the produced filaments after heating is improved.

The invention discloses a self-repairing inorganic material and a preparation method thereof. The self-repairing inorganic material comprises the following raw materials, in percentages by weight: 0.001-0.005% of nitric acid, 2-6% of zinc tartrate, 18-21% of tartaric acid, 3-6% of citric acid, 3-6% of calcium nitrate, 22-29% of a MnWO4 composite powder material, 13-18% of a cuprous oxide / MnWO4 composite powder material, and the balance of MnWO4. According to the material and method provided by the invention, the processes of roasting, grinding, secondary tempering and the like are adopted in the preparation process, so that the material has good water resistance and good self-repairing performance, and can be widely used in the field of construction; the cuprous oxide / MnWO4 composite powder material facilitates strength of a loose acicular structure, and the MnWO4 composite powder material greatly improves the overall impermeability of the structure; and the material can substantiallyimprove re-crack permeability and strength loss caused by damage cracks of ordinary concrete.

The invention discloses road surface crushing and rapid repairing equipment which comprises a vehicle body, a shell, a second pipe shell and an electric drill motor. Rolling wheels are mounted at thefour corners of the bottom of the vehicle body correspondingly. Wheels are installed between the two rolling wheels at the bottom of the vehicle body. A waste residue tank is mounted on one side of the interior of the shell above the wheels, a vacuum pump is mounted at the top of the waste residue tank, a handle is mounted on one side of the vehicle body, a slurry tank is mounted in the middle ofthe interior of the vehicle body, a slurry pump is mounted above the slurry tank, and a controller is mounted on the surface of the other side of the vehicle body. The supporting frame, the sleeve hole, the electric hydraulic push rod, the telescopic rod and the electric hydraulic push rod are installed, sleeve holes are formed in the two corners of the top of one side of the supporting frame, thesupporting frame is connected with the electric hydraulic push rod through the sleeve holes and the telescopic rod, and the supporting frame, the sleeve holes, the electric hydraulic push rod, the telescopic rod and the electric hydraulic push rod are matched with one another to facilitate front-back stretching of the supporting frame and facilitate movement to a designated working area.

The present application relates to the technical field of surveillance cameras, and specifically discloses an intelligent surveillance system, which includes a blind spot detection part, a surveillance video part and a temporary reflection part; the blind spot detection part and the surveillance video part are installed in the exhibition area, and the temporary reflection part is arranged at the entrance of the exhibition area to form a On the retaining wall of the exhibition area, the surveillance video part faces the inner side of the temporary reflection part, the back of the surveillance video part forms a blind spot, and the blind spot detection part is installed on the back of the surveillance video part to detect the blind spot; It is a cavity monitor, the temporary reflection part adopts double-layer glass, the temporary reflection part close to the indoor side of the exhibition area adopts coated glass, and the temporary reflection part close to the exhibition area outdoor side adopts electronically controlled dimming glass; when the blind spot detection part feeds back to the control room with When people wander in the blind area, the control room will control the light transmittance of the electronically controlled dimming glass to reduce, and the same color control room records the dynamics of the electronically controlled dimming glass, so as to collect key data for the monitoring blind area.

This invention refers to a warp sizing craftwork to fabric in weave industry. A direct processing warp sizing method used amylum latex includes brewage serosity and warp sizing steps. Its trait is 1) Brewage serosity, (1) the stuff selection, prepare, the stuff include amylum, polypropylene and exterior activator, the polypropylene is 1~10% of amylum dry weight, the exterior activator is 0.1~5% of stuff weight. (2) Serosity brewage. First, immit 3-5 times water of amylum bulk, then immit amylum to the conditioning, beat up enough to suspended latex. 2) Warp sizing. The warp dip the amylum latex of above slash box, the sizing let the amylum grain absorb yarn. The slash box keep the temperature of 20~35oC, the warp after sizing is through cylinder, felt the amylum paste on the fiber, meanwhile, realize sizing. This invention reduces the cost of sizing.

An indoor waterproof layer convenient for leaking stoppage and repair relates to the technical field of building waterproofing and comprises a first flow guide layer arranged on a floor, a second flow guide layer arranged on a wall, a connecting plate, a water-resisting layer and waterproof coatings arranged on the first flow guide layer, the second flow guide layer and the water-resisting layer, and a clamping groove is formed in the waterproof coating of the second flow guide layer. A sealing box is arranged in the clamping groove, a buckle plate is arranged on the clamping groove, and the first flow guide layer is connected with the second flow guide layer. The device is high in practicability and very convenient to use, a water leakage area can be quickly found out, later maintenance is facilitated, small cracks can be quickly filled, and the maintenance time and expenditure are saved.

The invention relates to the technical field of monitoring camera shooting, and particularly discloses an intelligent monitoring system which comprises a blind area detection part, a monitoring video part and a temporary reflection part. The blind area detection part and the monitoring video part are installed in the exhibition area chamber, the temporary reflection part is arranged at an entrance of the exhibition area to form a retaining wall of the exhibition area, the monitoring video part faces the inner side face of the temporary reflection part, a blind area is formed on the back face of the monitoring video part, and the blind area detection part is arranged on the back face of the monitoring video part to detect the blind area. The blind area detection part is an infrared detector, the monitoring video part is a cavity type monitor, the temporary reflection part is made of double-layer glass, one side, close to the exhibition area, of the temporary reflection part is made of coated glass, and one side, close to the exhibition area, of the temporary reflection part is made of electric control dimming glass; when the blind area detection part feeds back that people wander in the blind area to the control room, the control room controls the light transmittance of the electric control dimming glass to be reduced, and the same-color control room records the dynamic state of the electric control dimming glass, so that key data acquisition is carried out on the monitoring blind area.

The invention discloses an anti-deformation embedded block and a forming method for a mold case with a flat bottom plate. The anti-deformation embedded block used for forming a wax mold bottom plate of a single crystal directional vane module comprises a round plate with a flat outer surface, and the round plate is used for being embedded in a wax mold bottom plate forming mold to form a flat forming surface of the wax mold bottom plate. A flowing hole which is throughout a plate body of the round plate and used for mutual flowing of wax materials in an upper cavity and a lower cavity of the round plate and deformation resistance in the solidification process of the wax materials is formed in the round plate. The round plate is further provided with a positioning part used for positioning the round plate when the round plate is embedded in the wax mold bottom plate forming mold. The deformation of the wax mold in the solidification process of the wax materials can be effectively inhibited, deformation of the wax mold caused by surface tension of slurry in the case making process can also be inhibited, and the anti-deformation embedded block and the forming method for the mold case with the flat bottom plate are suitable for single crystal directional vane investment pattern precision casting of various aero-engines and industrial gas turbines.

The invention discloses an asphalt filling device for highway bridge maintenance, particularly relates to the technical field of highway bridge maintenance, and aims to solve the problems that when a gap appears on the side wall of a current highway bridge, asphalt is mostly manually filled in the gap, so that manpower is wasted, a corresponding warning mechanism is not arranged during manual operation, and the working efficiency is high. The asphalt melting device comprises a movable frame, a U-shaped frame is fixedly installed on the movable frame and can drive stirring blades and a stirring barrel to rotate synchronously, and the rotating directions of the stirring blades and the stirring barrel are opposite, so that asphalt can be quickly and uniformly stirred, and the melting efficiency of the asphalt can be effectively improved; the triangular warning plates can be driven by the fifth rotating rods to intermittently rotate by 60 degrees, so that three side surfaces of the three groups of triangular warning plates can be sequentially spliced, three danger warning words can be sequentially and circularly displayed at equal intervals, and a good warning and reminding effect can be further achieved.

The present invention relates to a water supply device for extracting coffee using vacuum force. The water supply device for coffee extraction includes: a flow path connected to the water storage tank; a water supply container connected to the flow path, including a storage space and a water distribution component, the storage space can be used for water storage, and the water distribution component passes through multiple a water outlet hole to discharge the water stored in the storage space to the bottom; and a valve unit that adjusts the amount of water supplied to the water supply container by opening and closing the flow path, and forms an air passage communicating with the outside in the water supply container. The water supply device for extracting coffee further includes an air passage opening and closing device capable of opening and closing the air passage, and a vacuum force can be formed inside the water supply container by opening the valve unit to fill the water supply container with water. During this period, the air passage is opened, and after the water supply container is filled with a predetermined amount of water, the air passage is closed by the air passage opening and closing device. According to this structure, the present invention can provide the following water supply device for coffee extraction, that is, a vacuum force is formed inside the water supply container, thereby, the supply speed and amount of water supplied to the coffee powder can be adjusted, and the water supply to the coffee powder can be adjusted. The supplied water is uniformly distributed and supplied to a plurality of positions.