500results about How to "Evenly filled" patented technology

The invention discloses a PCB (printed circuit board) spraying etching machine and a method thereof, belongs to the technical field of spraying etching machines, and provides the following scheme that the PCB spraying etching machine comprises a spraying etching mechanism, a cleaning mechanism is assembled in the spraying etching mechanism, and the spraying etching mechanism comprises etching equipment; the first motor drives the rotating shaft to rotate, the rotating shaft drives the worm and the worm gear to conduct transmission, the polygonal cylinder drives the conveying wheel to rotate, the conveying wheel can achieve the purpose of automatic material conveying, meanwhile, the conveying pump sprays etching liquid to a circuit board through the spraying heads, the angles of the spraying heads are different, and therefore spraying uniformity can be kept, and the spraying efficiency is improved. And the rotating shaft also drives the cam to rotate, so that the cam extrudes the pulley to move, and the cam can be matched with the first spring to realize the reciprocating translational motion of the polygonal cylinder, so that the conveying wheel drives the circuit board to do reciprocating motion, the circuit board can be uniformly etched, and the processing quality of the circuit board is improved.

The invention provides a rapid repairing method for an aerospace carbon fiber composite material, and belongs to the technical field of carbon fiber composite material repairing, in the aspect of cleaning, a special cleaning agent for self-research is free of damage and efficient, a preset cleanliness can be achieved by matching with a tool with a replaceable brush head, a foundation is laid for repairing, the damage is accurately measured by advanced detection equipment, the detection precision is 0.1 mm, and the detection efficiency is high. The repair material is scientific in formula and reasonable in component proportion, it can be guaranteed that the performance of a repaired part is close to that of an original part, the strict repair technology such as vacuum auxiliary pressure injection and autoclave curing guarantees sufficient curing and optimal performance of the material, and it is guaranteed that the quality reaches the standard through surface treatment and detection; all the devices of the equipment cooperate and are provided with intelligent systems, parameters can be regulated and controlled, the technology can be automatically adjusted, the structure meets special aviation requirements, carrying and operation are convenient, various scene requirements are met, and the equipment has great significance in guaranteeing aircraft operation and flight safety.

The invention relates to the technical field of PET materials, and particularly discloses a wear-resistant PET bottle and a preparation process thereof. The wear-resistant PET bottle is prepared from the following raw materials: PET resin, modified ceramic powder, glass fibers, a flexibilizer, an antioxidant, a light stabilizer and a lubricant. Wherein the modified ceramic powder comprises B2O3-Al2O3 complex-phase powder and a titanate coupling agent, the B2O3-Al2O3 complex-phase powder is modified by the titanate coupling agent, one end of a coupling agent molecule is connected with B2O3-Al2O3 complex-phase powder particles through chemical action, and the other end of the coupling agent molecule is crosslinked with PET resin, so that the compatibility of the ceramic powder and matrix resin is improved; and the ceramic powder is uniformly dispersed in the PET resin, so that the wear resistance of the PET resin is effectively enhanced.

The invention discloses an underground building bottom plate advanced water stop post-cast strip structure which comprises a cushion layer concrete layer, other waterproof layers are arranged on the cushion layer concrete layer, and waterproof layer protection layers are arranged on the other waterproof layers. An earthwork groove is formed in the cushion layer concrete layer, same-bottom-plate steel bar layers are arranged on the two sides of the earthwork groove, and a waterproof assembly used for preventing water is arranged between the same-bottom-plate steel bar layers. A bottom plate bottom layer steel bar layer is arranged at the upper end of the same bottom plate steel bar layer, and two mud blocking assemblies are installed on the bottom plate bottom layer steel bar layer. A post-cast strip groove is formed between the two lower fast-easy closing-in nets and the two upper fast-easy closing-in nets, and a supporting part used for supporting is arranged in the post-cast strip groove. The lower fast and easy closing-in net and the upper fast and easy closing-in net can be supported, the stability of the lower fast and easy closing-in net and the stability of the upper fast and easy closing-in net can be improved during bottom plate concrete pouring, and then the stability of the overall structure is improved.

The invention belongs to the technical field of hydrogen storage equipment, and relates to a solid hydrogen storage tank and a manufacturing method thereof, the solid hydrogen storage tank comprises a tank body and a core heat exchanger arranged in the tank body; the core heat exchanger is arranged in the tank body and consists of a plurality of H-shaped expanded surface finned tubes, each H-shaped expanded surface finned tube comprises a heat exchange tube and a plurality of radiating fins arranged on the heat exchange tube, gaps among the fins are used as spaces for placing hydrogen storage materials, and the fins are arranged in sequence; a plurality of screen H-shaped expansion surface finned tubes are stacked up and down and fixed by tube clamps, and a plurality of screens are connected into a whole and fixed on a bracket at the upper part of the tank body. According to the core heat exchanger, the H-shaped expanded surface finned tube is adopted as a basic unit of the core heat exchanger, and the heat and mass transfer efficiency between a hydrogen storage material and a heat exchange medium is effectively improved by increasing the number and the area of the radiating fins. And meanwhile, the sequential arrangement mode is adopted, so that the core heat exchanger is filled with the hydrogen storage material more uniformly, and the hydrogen storage density and the hydrogen charging and discharging rate are further improved.

The invention relates to a preparation method of an electrode grid line and a photovoltaic cell, and relates to the field of photovoltaic technology, and the preparation method comprises the following steps: S1, providing a substrate, and forming a polymer layer on the substrate; s2, pressing a groove corresponding to a required electrode pattern on the polymer layer by using a mold to obtain a template; s3, a conductive material is smeared on the polymer layer, the groove is filled with the conductive material, and the redundant conductive material is scraped off; s4, providing a base material, covering the base material with the template, and transferring the polymer layer and the conductive material to the base material at a certain temperature and pressure; s5, stripping the substrate from the polymer layer, dissolving the polymer layer, and leaving the conductive material to be adhered to the base material; and S6, sintering the conductive material to form the electrode grid line. According to the invention, plate coating, high-precision transfer printing, water dissolution and high-temperature sintering technologies are utilized, the production process is efficient, and the accuracy of electrode patterns can be maintained.

The invention relates to the field of concrete pouring, in particular to a pavement pouring device for concrete construction. The technical problems that an existing device cannot well construct an inclined road surface, and stress is not uniform when the inclined road surface is solidified are solved. According to the technical scheme, the device comprises two first supporting frames, the tops of the two first supporting frames are jointly connected with a supporting plate in a sliding mode, and the device further comprises a movable driving mechanism, an angle adjusting mechanism, a containing mechanism and a vibration discharging mechanism. The height of the buoyancy ball is controlled through the inclined first connecting rod when the second connecting rod rotates, so that the height of the buoyancy ball is lower when an inclined road surface is poured, the thickness judgment during pouring of the inclined concrete road surface is reduced, the thickness of the buoyancy ball is matched with the inclination angle of the concrete road surface, and a flowing space is reserved for flowing of concrete; the thickness uniformity of the concrete pavement is ensured, and the thickness detection of the concrete pavement at different inclination angles is realized.

The invention relates to the field of numerical control machine tools, and discloses an automatic lubricating device for a gantry machining center. Comprising a base, gantry machining equipment located on the outer side of the base, a sliding rail installed on the base, a sliding block installed on the sliding rail in a sliding mode, an oil injection channel formed in the sliding rail, an oil inlet pipeline and an oil outlet pipeline, and the oil inlet pipeline and the oil outlet pipeline communicate with the oil injection channel. A lubricating assembly communicating with the oil injection channel is installed in the installation cavity, and the lubricating assembly makes contact with the inner wall of the sliding block and injects oil into the sliding block. Compared with the prior art, the lubricating device has the following advantages and effects that the sliding block continuously makes contact with the plugging ball when moving on the sliding rail, the sliding block and the sliding rail are evenly lubricated through rolling between the plugging ball and the sliding block, the filling amount each time is fixed, waste of lubricating oil caused by the too large filling amount is avoided, and the service life of the lubricating device is prolonged. And oil leakage is avoided during oil injection, so that the production cost is reduced.

The utility model relates to the technical field of loading machine counter weights, in particular to a loading machine counter weight which comprises a fixing frame, a counter weight box is fixedly installed on the fixing frame, sand is filled in the counter weight box, a moving groove is formed in the fixing frame, a threaded rod is horizontally and rotatably installed in the moving groove, and the threaded rod is fixedly connected with the fixing frame. A driving motor is fixedly mounted at one end of the fixing frame, a threaded rod is sleeved with a moving block in a threaded mode, a mounting plate is fixedly mounted on the lower surface of the moving block, a plurality of fixing frames are mounted on the mounting plate through connecting assemblies, and balancing weights are fixedly mounted on the fixing frames. Through mutual cooperation of the driving motor, the threaded rod, the moving block, the mounting plate, the fixing frame and the balancing weight, the gravity center of the balance weight on the loader can be horizontally adjusted, the loader is prevented from tipping over and tilting backwards, the problem that the gravity center position of a traditional loader balance weight cannot be adjusted is solved, and the overall applicability and flexibility of the loader are improved.

The invention relates to the technical field of resin infusion, and provides a resin flow control system in a carbon fiber plate vacuum infusion process. The central processing module is responsible for coordinating and controlling the operation of each sub-module, and is used for collecting sensor data in real time and executing local data processing and control decisions; the vacuum control module is used for controlling and adjusting a vacuum environment and ensuring that the resin filling process is carried out under a set vacuum condition; the bubble processing module is used for identifying bubbles generated in the flowing process of the resin and carrying out defoaming treatment by using ultrasonic waves; the flow direction of resin is monitored in real time through the flow direction detection unit, the flow of the resin and the flow angle of the resin are adjusted according to actual requirements in the filling process, it is ensured that all parts can be smoothly filled with the resin, gaps or flowing dead corners are avoided, uniform distribution of the resin is ensured, product defects caused by uneven filling are reduced, and the product quality is improved. And the consistency and the quality of products are improved.

The invention relates to the field of VOCs treatment, and discloses a composite material for adsorbing VOCs as well as a preparation method and application thereof. The composite material comprises foam metal and a heat-conducting adsorption material filled in a foam metal framework, the heat-conducting adsorption material comprises a porous material and a heat-conducting material. The composite material provided by the invention has the characteristic of good heat conduction effect, meanwhile, the shape and the size of the foam metal can be randomly adjusted according to the requirements of an adsorption bed layer, and the composite material can be used for adsorbing light hydrocarbons, such as small molecules such as ethane and propane.

The utility model provides a dosing device for sewage treatment, which belongs to the field of sewage treatment equipment and comprises two sliding rails, the two sliding rails are respectively mounted at two ends of the top surface of a sewage pool, sliding frames are arranged on the top surfaces of the two sliding rails, a supporting plate is fixed between the two sliding frames, and the supporting plate is fixed on the sliding rails. And a liquid storage tank is fixedly mounted in the middle of the supporting plate. According to the chemical dosing device, during chemical dosing, the stirring motor is controlled to rotate to drive the transmission rod to rotate in the liquid storage tank, the transmission rod rotates to drive the stirring blades fixedly mounted at the bottom to rotate along with the transmission rod, and the stirring blades rotate to drive chemical liquid in the liquid storage tank to be uniformly mixed, so that the chemical liquid is prevented from standing and precipitating to influence the sewage treatment effect; the driving motor drives the pulleys on the two sides of the sliding frame to slide on the sliding rails, so that the dosing nozzle is driven to move along the sewage pool for dosing, and the liquid medicine can be uniformly injected into the sewage pool.

The invention relates to the technical field of organic synthesis, in particular to a method and device for preparing 4-methyl-1-pentene, and the method comprises the following steps: (1) pretreating a raw material containing propylene and an inert substance, and carrying out heat exchange on the obtained refined raw material to obtain a heat-exchanged raw material; (2) carrying out dimerization reaction on the raw material subjected to heat exchange and a catalyst in the presence of inert gas, wherein the obtained reaction product is divided into a part of reaction product and a residual part of reaction product; (3) cooling the part of the reaction product as a heat exchange medium, and carrying out heat exchange with the refined raw material to obtain a heat-exchanged product; (4) separating a mixed material of the rest reaction product and the product after heat exchange to obtain a light component and a heavy component; and carrying out rectification on the heavy component to obtain the 4-methyl-1-pentene. According to the method, by controlling the reaction temperature rise, the stable reaction temperature and the uniform reaction process are ensured, and the raw material conversion rate and the product selectivity are further improved.

The invention aims at providing a powder filling mechanism which comprises a machine table and a filling assembly, the filling assembly comprises a material disc, a bottom ring, a material pushing rod and a material filling rod, the material disc is rotationally arranged on the machine table, a material filling hole is formed in the material disc, the bottom ring is arranged on the machine table in a height-adjustable mode, and the bottom ring is located on the bottom side of the material disc so that the distance between the bottom ring and the material disc can be adjusted; a clearance groove is formed in the bottom ring, the pushing rod and the filling rod are slidably arranged on the machine table in the vertical direction, the pushing rod and the filling rod are located above the material disc, the pushing rod is aligned to the clearance groove, the filling rod is aligned to the bottom ring, and the material disc is used for rotating so that the filling hole can circularly pass through the filling rod and the pushing rod; when the filling hole is aligned with the filling rod and the filling rod descends, the filling rod presses the medicine powder into the filling hole, and when the filling hole is aligned with the pushing rod and the pushing rod descends, the pushing rod pushes the compacted medicine powder in the filling hole out of the clearance groove.

The invention relates to the technical field of motor potting, and discloses a stepping motor stator glue pouring device which comprises a vacuum box and a jig, a supporting column is fixedly installed on the bottom wall of the vacuum box, a ball head is fixedly installed at the top end of the supporting column, a supporting disc is movably installed at the top end of the supporting column through the ball head, and the jig is placed on the supporting disc. A centering positioning mechanism used for limiting the jig is installed on the top of the supporting disc, and a plurality of supporting springs are evenly and fixedly installed between the bottom wall of the vacuum box and the lower surface of the supporting disc in the circumferential direction. According to the invention, the glue injection head carries out comprehensive glue injection operation around the upper part of the stepping motor stator, and the stepping motor stator placed on the supporting disc and the jig slightly swing, so that glue can better flow and permeate into each corner in the stepping motor stator; and moreover, when the glue continuously flows, tiny bubbles possibly formed in the glue can be removed, and the glue filling effect of the stepping motor stator is improved.

The utility model relates to an intelligent shower gel quantitative filling device, which belongs to the technical field of shower gel filling and comprises a filling table, a height adjusting mechanism is arranged in the filling table, a clamping mechanism is arranged on the top side of the filling table, a weighing device body is arranged on the top side of the height adjusting mechanism, and a weighing device is arranged on the top side of the weighing device body. Four supporting rods are fixed to the top side of the filling table, a transverse plate is fixed to the top sides of the four supporting rods, a connecting pipe is fixed to the interior of the transverse plate, a plurality of discharging pipes are fixed to the bottom side of the connecting pipe, and filling nozzles are fixed to the bottom sides of the discharging pipes. According to the intelligent shower gel quantitative filling device, the height adjusting mechanism is arranged on the filling table, the placement height of a shower gel container can be adjusted according to the size and height of the shower gel container, and smooth filling of shower gel is facilitated; and shower gel containers with different diameters can be clamped by adjusting the relative distance between the two clamping plates.

The utility model is applicable to the technical field of vegetable seedling raising, and provides an automatic substrate filling device for a planting plate for vegetable seedling raising, which comprises a base, and a rack is fixedly mounted at the top of the base; the stock bin is used for containing a matrix for vegetable seedling raising, and the bottom of the stock bin is fixedly communicated with a filling pipe; the collecting hopper is arranged on the base, and a placing seat is arranged in the collecting hopper; the placement seat is provided with a planting disc used for receiving and containing a matrix; and the adjustable trowelling plate is used for trowelling the matrix in the planting plate and is arranged in the collecting hopper. According to the automatic substrate filling device of the planting plate for vegetable seedling culture, provided by the scheme, the efficient and uniform filling of the substrate is realized by integrating the automatic discharging mechanism and the stirring and blending mechanism; and the problems of low efficiency and non-uniform filling in a traditional manual filling mode are also solved.

The utility model relates to the technical field of road maintenance and repair, in particular to a pavement crack repairing device for traffic engineering, which comprises a rack, the rack is an assembly main body of the repairing device, a case is fixedly mounted at the top of the rack, a handle is mounted at the upper part of the rear side of the case, and the handle is fixedly mounted on the rack. Universal wheels are installed at the four corners of the bottom of the rack, and brake pieces are arranged in the universal wheels. The device further comprises a stirring bin; a stirring bin for stirring repairing slurry is arranged on the upper portion of the machine box, an opening is formed in the top of the stirring bin, a section of interval space is arranged on the front side between the machine frame and the machine box, and the motor is fixedly installed on the plate face, where the interval space is located, of the machine frame. According to the utility model, the motor drives the stirring frame to uniformly stir repairing slurry in the stirring bin, and the slurry pump is utilized to directly fill the uniformly mixed slurry into the pavement gap to be repaired, so that the operation process is simplified, and the construction speed of pavement gap repairing is accelerated.

The invention discloses a method for in-situ growth of a ZIF-7 film layer on the surface of a magnesium alloy micro-arc oxidation film layer, and the method specifically comprises the following steps: step 1, treating the surface of a magnesium alloy workpiece to be processed to make the surface smooth; 2, the workpiece treated in the step 1 serves as an anode to be placed in electrolyte, graphite serves as a cathode, a direct-current power source is adopted for conducting micro-arc oxidation treatment on the workpiece in a constant-current mode, a micro-arc oxidation film layer is formed on the surface of the workpiece, and then cleaning and blow-drying are conducted; step 3, putting the workpiece prepared in the step 2 into a ZIF-7 seed crystal solution, keeping the temperature at 110-130 DEG C for 180-300 minutes for in-situ growth, and taking out, cleaning and drying the workpiece after the growth is finished; wherein the ZIF-7 seed crystal liquid is prepared from zinc nitrate hexahydrate and benzimidazole, and the solvent is prepared from N, N-dimethylformamide and methanol; in the ZIF-7 seed crystal liquid, the concentration of zinc nitrate hexahydrate is 0.5 to 2.5 g / L, and the concentration of benzimidazole is 0.5 to 2.5 g / L.

The present invention discloses a semiconductor device and a manufacturing and packaging method thereof, including a chip, a lead frame and a package body, wherein the lead frame includes a chip seat and pins, and also includes a guide lead, wherein the guide lead is connected to the chip and the pins respectively, and the middle section of the guide lead protrudes out of the chip, and the package body is injection molded to cover the chip and the lead frame, and the pin part protrudes out of the package body, and a pouring port is arranged on the package body, and the pouring port is arranged on a side close to the guide lead. The present invention arranges the pouring port on a side close to the guide lead, so that the package body can flow along the direction of the guide lead during injection molding, and effectively eliminates the pores and weld lines under the guide lead; the middle section of the guide lead protrudes out of the chip, so that the gap between the guide lead and the chip, and between the guide lead and the lead frame is expanded, so that the package body is smoothly filled in; the chip delamination, package body colloid cracking, water vapor intrusion, ion pollution and other problems are effectively prevented, and the service life of the semiconductor device is improved.

The present invention relates to the technical field of polishing equipment, and specifically to an optical lens polishing device, comprising a base, wherein the top center of the base is rotatably connected to a rotating grinding table for polishing and grinding the lens, and a fixed bracket is installed on the right side of the top of the base. The present invention uses a vacuum pump to adopt negative pressure adsorption to perform integrated and synchronous adsorption and clamping of multiple optical lenses. While vacuum adsorption, the circumferential clamping assembly tightens the clamping block in the center by tightening the steel rope. The combination of the two improves the stable clamping of the optical lens, and the polishing liquid falls along the spiral channel. The gravity of the polishing liquid is used to achieve self-stirring and mixing. The rotation of the stirring blades in the mixing assembly is conducive to achieving uniform mixing and stirring of the polishing liquid. The integrated and synchronous linkage of the rotating polishing table, the linkage stirring mechanism, the reciprocating swing mechanism and the reciprocating feeding mechanism is synchronously driven by the driving motor, thereby reducing the number of driving parts.

The present application belongs to the field of medical surgical instruments, and provides an elbow joint surgical instrument, which includes a head, fixed wings, and a fixed cage. The head is used to cover the surface of the distal end of the humerus; the fixed wings are connected to the side of the head and are used to connect to the humerus; the fixed cage is connected to the head and forms a bone crushing groove with the head for accommodating the filling bone, and the fixed cage also has a limiting structure for cooperating with the bone tissue of the distal end of the humerus. The elbow joint surgical instrument provided by the present application can greatly reduce the amount of osteotomy, which is conducive to later revision surgery. The filling bone placed in the bone crushing groove is conducive to promoting the patient's postoperative recovery and postoperative weight-bearing. The limiting structure cooperates with the bone tissue in the corresponding area of ​​the distal end of the humerus, which is conducive to strengthening the stability of the elbow joint surgical instrument fixed on the distal end of the humerus.

The invention discloses a falling film reboiler evaporation system based on a heat-sensitive material, and relates to the technical field of falling film reboilers, the falling film reboiler evaporation system comprises a shell, the upper part of the inner side of the shell is fixedly connected with partition plates I at equal intervals from top to bottom, and the lower side surface of each partition plate I is uniformly and fixedly connected with a plurality of heat exchange pipes; inclined holes are formed in the corresponding positions of the upper side surface of the first partition plate and communicate with the corresponding heat exchange pipes correspondingly, the lower ends of the heat exchange pipes are fixedly connected with round holes formed in the corresponding positions of the third partition plate correspondingly, and the lower end of each heat exchange pipe penetrates through the corresponding round hole to extend to the lower side of the third partition plate. The side surface of the third partition plate is fixedly connected with the corresponding position of the inner side surface of the shell, a second partition plate is arranged between the third partition plate and the first partition plate, attachments on the inner side and the outer side of the pipeline are automatically scraped, the attachments are prevented from affecting heat exchange work, and the heat exchange work effect is more uniform.

The invention relates to a stator winding potting tool, which comprises a stator, a core mold, an upper mold, a lower mold, a sealing ring, a potting head, a rotating shaft, a gear transmission device, a motor, a UV lamp, a heating coil and the like, and is characterized in that the sealing ring is arranged between the upper mold and the lower mold, so that effective sealing between the stator and the molds is ensured, and glue leakage is prevented; bubbles in the stator and in the glue are extracted through vacuum equipment, and it is ensured that the glue evenly fills stator winding gaps; the motor drives the stator to rotate to generate centrifugal force, so that the glue is uniformly distributed in each gap of the stator winding; a UV lamp is arranged in the core mold and used for rapidly curing glue, the outer barrel is provided with a heating coil, stress generated in the glue curing process is eliminated through heating, efficient and uniform glue distribution, bubble elimination and stress elimination are achieved through the synergistic effect of centrifugal force, vacuum and heating, the stator winding potting quality and efficiency are improved, and the production efficiency is improved. The method is suitable for stator winding potting operation with high requirements on electrical insulation performance.

The invention relates to a dynamic solidification pouring system for investment casting, which comprises a die head and a plurality of die shell structures arranged around the die head, and the die head is matched with the die shell structures; the die head comprises a pouring column body, an exhaust structure is arranged on the upper portion of the pouring column body, and a spiral auxiliary pouring gate is arranged on the lower portion of the pouring column body. The mold shell structure comprises a product pouring inner cavity, an upper connecting port is formed in the top of the mold shell structure, and a lower pouring channel is formed in the bottom of the mold shell structure. When the pouring system is used, dynamic solidification pouring of molten metal can be achieved, after the molten metal enters the pouring system, the molten metal enters the product pouring inner cavity along the spiral auxiliary pouring gate under the action of centrifugal force, then solidification is completed layer by layer along the inner wall of the mold shell, metal of each layer is solidified in sequence, mold filling can be completed stably and rapidly, and the production efficiency is improved. And the mold filling speed is increased, the probability of insufficient pouring and cold shut of the thin-wall metal part is reduced, and the product quality is improved.

The invention belongs to the technical field of pipe fitting processing and forming, particularly relates to pipe fitting casting and forming equipment and a casting and forming method, and provides the following scheme aiming at the problems that a mold cannot be fully and uniformly filled with existing slurry, the efficiency of manual coating of a release agent is low, the phenomenon of coating leakage exists, and meanwhile pipe fitting forming consumes time. Comprising a base, a U-shaped frame is fixed to the top of the base, a rotating column is rotationally connected between the top of the base and the inner wall of the top of the U-shaped frame, the outer wall of the rotating column is fixedly sleeved with a rotating base rotationally arranged at the top of the base, a plurality of round holes are formed in the top of the rotating base, and a first motor is fixed in the base. The inner mold rotates relative to the outer mold, then slurry can be evenly poured into the pouring cavity, the hollow phenomenon is avoided, the slurry in the pouring cavity is heated through the inclined holes in the later period, and the forming speed of the slurry is increased.

This utility model discloses a tunnel fire-fighting foam liquid filling system, belonging to the field of fire-fighting equipment technology. It includes several fire boxes, a foam liquid filling vehicle, and a monitoring center. Both the fire boxes and the foam liquid filling vehicle are networked with the monitoring center to achieve data exchange. Specifically, each fire box contains a foam liquid storage tank and a first control device. The foam liquid storage tank is equipped with a first liquid level sensor, a solenoid valve, a variable frequency delivery pump, and a first flow meter. A flow regulating valve and a second flow meter are installed on the pressure water pipe. All components are connected to the first control device. The foam liquid filling vehicle contains a foam liquid storage tank, a variable frequency high-pressure pump, a battery, a third flow meter, and a second control device. Both the first and second control devices are connected to the monitoring center. This utility model provides a highly efficient, intelligent, and easy-to-maintain tunnel fire-fighting foam liquid filling system.

The invention relates to the field of data processing, in particular to a data transmission quality optimization method and system for an intelligent ammeter, and the method comprises the steps: obtaining a historical sensitivity sequence and a secret key updating record of each ammeter, and constructing a transmission sensitive vector; clustering the electricity meter groups and endowing sensitive grades to the electricity meter groups; dividing a transmission period into a plurality of time slots, establishing corresponding transmission scheduling groups, and distributing the ammeters to the groups according to the sensitivity levels to form an initial scheduling scheme; collecting network and computing resource states and computing resource pressure at the beginning of the current transmission period; and comparing the resource pressure with double thresholds, taking the sum of the transmission sensitivities of the electric meters in the group as a load according to a comparison result, dynamically adjusting the corresponding sequence of each transmission scheduling group and the transmission time slot according to the load, and issuing a transmission instruction. According to the invention, through a double-layer scheduling mechanism combining historical behavior grading and real-time resource perception, peak shifting transmission of the electricity meter group is realized, and the processing efficiency of the concentrator is remarkably improved.

The utility model discloses manufacturing and processing equipment for a thermal insulation pipe, which is characterized in that a bottom plate is mounted at the bottom of a frame, a transmission motor is mounted at the top of one side of the frame, the input end of the transmission motor is electrically connected with the output end of an external power supply, a lead screw is mounted at the output end of the transmission motor, and sliding chutes are formed in two sides of the top end of the frame; a sliding groove is formed in the outer pipe, a mounting plate is slidably mounted in the sliding groove in an embedded mode, a material injection tank is mounted in the middle of the top end of the mounting plate, hoses are connected to the two sides of the edge of the material injection tank, and bent pipes are connected to the bottom ends of the hoses. The outer pipe can be rapidly moved to the position aligned with the center point of the inner pipe, meanwhile, the hose and the bent pipe are pulled to stretch into a gap between the outer pipe and the inner pipe, the gap between the inner pipe and the outer pipe can be evenly filled with polystyrene foam, and polystyrene foam injection work can be completed more rapidly.

The invention discloses a heterogeneous catalyst for preparing methyl formate through CO esterification and a preparation method and application of the heterogeneous catalyst, and belongs to the field of methyl formate synthesis. The heterogeneous catalyst comprises a palladium active component, an auxiliary agent and a carrier, the auxiliary agent is selected from La and / or Ce; the loading capacity of the palladium active component is 0.01-0.6% of the mass of the carrier; and the loading capacity of the auxiliary agent is 0.01-10% of the mass of the carrier. Compared with a catalyst auxiliary agent reported in the literature, the rare earth auxiliary agent disclosed by the invention can enhance the interaction between the precious metal and the carrier, effectively improve the utilization rate of the precious metal, reduce the dosage of the precious metal and the production cost of the catalyst, and remarkably improve the economical efficiency of the technology. The preparation method disclosed by the invention is simple in process, easy to realize large-scale amplification and excellent in catalyst performance, and can be applied to a production technology for preparing methyl formate through CO esterification.