601results about How to "Uniform delivery" patented technology

The invention belongs to the technical field of mechanical part surface finishing machining, and aims to solve the problem that traditional barreling finishing machining is difficult to meet the requirements for high precision and uniformity of a large wind power gear ring. The vertical local forced excitation polishing and grinding method for the large wind power gear ring comprises the following steps that a to-be-polished and ground section of the to-be-polished and ground large gear ring is placed in a polishing and grinding container filled with a machining medium; and a vibration excitation element in the machining medium is driven to perform combined motion of radial intermittent feeding motion, axial intermittent feeding motion and reciprocating linear motion, and is matched with circumferential intermittent rotary motion of the large gear ring, so that a locally forced particle flow field is formed in the machining medium, and gear surface finishing machining is performed on the large gear ring to be polished and ground. According to the large gear ring polishing and grinding device, intense exciting force can be applied to a certain specific tooth surface part of a large gear ring in a targeted mode, local polishing and grinding are conducted in a centralized mode, consistent polishing and grinding of different parts of the tooth surface of the large gear ring can be achieved in an all-around mode at a time, and the surface roughness of the large gear ring can be reduced.

The utility model discloses an energy-saving steam boiler device and relates to the technical field of steam boilers. An energy-saving steam boiler device comprises an energy-saving steam boiler body, a smoke exhaust pipe is fixedly connected to the position, close to the right side, of the top of the energy-saving steam boiler body, a heating chamber is fixedly installed on the inner bottom wall of the energy-saving steam boiler body, and a creeping pipe is fixedly connected to the end, away from the heating chamber, of a connecting pipe; a water bin is arranged at the position, close to the bottom, of the right side in the energy-saving steam boiler body, a sealing heat insulation plate is fixedly installed on the inner wall of the water bin, and a waste smoke filtering bin is arranged at the position, close to the top, of the right side in the energy-saving steam boiler body. And sliding rails are fixedly installed at the positions, close to the top and the bottom, of the front end wall and the rear end wall in the waste smoke filtering bin correspondingly, activated carbon filtering net plates are arranged in the sliding rails, a driving motor is fixedly installed at the top of the motor frame, and fan blades are fixedly connected to the output end of the driving motor.

The invention discloses a heating structure used in a scanning electron microscope and a use method of the heating structure, and relates to the technical field of scanning electron microscope high-temperature performance tests.The heating structure comprises a laser, a shell module, a laser clamping module and an electron back scattering diffraction scanning fixing module, and the upper surface of the electron back scattering diffraction scanning fixing module is obliquely arranged; the laser clamping module is installed on the electron back scattering diffraction scanning fixing module, the shell module is installed above the laser clamping module, a heating dodging plate used for placing a sample to be tested is arranged in the shell module, and the laser clamping module is used for clamping a laser lens of a laser. Laser beams output by the laser lens are irradiated on the heating dodging plate, the two ends of the to-be-tested sample extend out of the shell module and are connected with the stretching table, and an observation hole for observing the sample is formed in the upper end of the shell module. According to the invention, the imaging definition of the scanning electron microscope can be improved, and the in-situ high-temperature mechanical property test and the EBSD high-temperature analysis experiment in the scanning electron microscope can be smoothly carried out.

The invention relates to a full-automatic circulating canal scalding pool for pig slaughtering, and belongs to the field of livestock slaughtering, the full-automatic circulating canal scalding pool comprises a scalding pool body, a water pump circulating pipeline, an inlet descending track, an outlet lifting track, a double-hinge strip, a supporting cross beam frame, a pig pressing device, a hook chain, a scalding pool shield and a drainage pipeline, the turning position of the scalding pool is of a semi-arc structure, turning is smoother, and cross collision is reduced; the water pump circulation pipeline enables the water pumping and draining direction to be consistent with the water flow direction, automatic circulation of water flow in the scalding pool is achieved, the water flow heating effect is improved, the heating time is shortened, meanwhile, faster reverse water flow can keep backward pulling force of a pig body on a hook, and unhooking is avoided. The novel double-hinge strip with side guiding is used, and two corner wheels are removed, so that the operation is more stable; the front end and the rear end of the scalding pool are communicated, so that water flow in the scalding pool can integrally flow circularly, the uniformity of water temperature and the heating efficiency of pig carcasses are improved, the heating time is shortened, and the freshness of meat is improved.

The invention relates to the technical field of optical fiber processing, and discloses a multi-core-diameter optical fiber ultrasonic cutting system under uniform stress, which comprises a clamping symmetrical assembly, a horizontal tension driving assembly, an ultrasonic cutting assembly and a cutting knife pushing assembly, an optical fiber is clamped through the cooperation of the pressing plate and the clamping assembly base; the clamping assemblies are slidably connected with the horizontal tension driving assembly, the two clamping assemblies are driven by the horizontal tension driving assembly to move reversely, and horizontal tension is applied to the optical fiber, the ultrasonic cutting assembly is slidably connected with the cutting knife pushing assembly, and the cutting knife pushing assembly is arranged on one side of the clamping symmetrical assembly and located between the two clamping assemblies. The cutting knife pushing assembly drives the ultrasonic cutting assembly to move to cut the optical fiber; the optical fiber cutting device can effectively meet the cutting requirements of optical fibers with different core diameters, the flatness of the cut end face is remarkably improved, and burrs and cracks are reduced.

The invention discloses a dynamic adaptation and multi-level feedback control solid heat storage system and method.The system comprises a heat storage unit, a feedback control system, a self-adaptation control module and a dynamic flow adjusting device, the heat storage unit is connected with the feedback control system and the self-adaptation control module, the self-adaptation control module is connected with the feedback control system, and the dynamic flow adjusting device is connected with the feedback control system. The dynamic flow adjusting device is arranged on the heat storage unit and connected with the feedback control system and the self-adaptive control module. The heat storage unit comprises a plurality of subareas, and a plurality of heat storage modules which are connected in series and in parallel are arranged in each subarea; the feedback control system comprises a multi-point sensor and is used for monitoring temperature and flow data of each subarea; the self-adaptive control module is used for dynamically adjusting the flow and the temperature of each partition in the heat storage unit by utilizing a multi-level feedback algorithm based on real-time data of the feedback control system; the dynamic flow adjusting device is used for adjusting flow distribution of all the subareas in the heat storage unit according to the load requirement.

The invention discloses a heating energy-storage snow-melting anti-cracking pavement structure system for a road. The system comprises a heat-conducting anti-cracking modified asphalt concrete surface layer, a temperature-adjusting emulsified asphalt macadam layer, a heating anti-cracking steel wire reinforced net, a heat-conducting anti-cracking asphalt concrete bottom layer, an energy-storage cement stable base layer, a PLC (Programmable Logic Controller), an energy storage battery, a solar panel and a temperature sensor. Through the heating function of the heating device, the whole road surface is heated, the road surface is uniformly heated, snow accumulation and icing on the road surface are prevented, and the ice and snow removing cost is reduced; the copper-plated steel fibers are added to the surface layer and the bottom layer of the asphalt concrete, so that the conductivity of the asphalt concrete is improved, and the heat-conducting capacity of the asphalt concrete is enhanced; graphite powder in the temperature-adjusting emulsified asphalt macadam layer has better uniform heat conduction performance, so that the emulsified asphalt macadam layer can form a uniform ultrathin heat conduction'panel '; a certain proportion of paraffin is added into the cement-stabilized base layer, the paraffin releases heat in a low-temperature state, and cracking caused by icing of water in the cement-stabilized base layer is prevented.

The invention discloses a double transition metal / chitosan-based carbon aerogel composite material and a preparation method and application thereof.The method comprises the steps that a nitrogen source and transition metal salt are added into a hydrochloric acid solution of chitosan, stirred, dissolved and evenly dispersed to prepare a mixed solution, the mixed solution is subjected to freeze drying, and the double transition metal / chitosan-based carbon aerogel composite material is obtained. Chitosan aerogel containing transition metal and a nitrogen source is prepared; the transition metal salt is any two of ferric salt, cobalt salt and nickel salt; the chitosan aerogel containing the transition metal and the nitrogen source is placed in a methanol solution of 2-methylimidazole, after vibration treatment and drying, the chitosan aerogel is placed in a nitrogen atmosphere to be subjected to heat treatment, and the double-transition-metal / chitosan-based carbon aerogel composite material is prepared. The preparation method is simple and reasonable in design, the prepared material has good specific surface area and porosity, the formed metal-nitrogen double active center effectively improves the adsorption performance of the material, and the material has good catalytic performance.

The invention relates to the technical field of coronary intervention, in particular to a coronary intervention guide wire fixing device which comprises a shell, a rotary knob is rotatably mounted at the other end of the shell, a connecting column is fixedly mounted at the end, located in the shell, of the rotary knob, and a fixing bin rotatably connected with the inner wall of the shell is fixedly mounted at the end, away from the rotary knob, of the connecting column; rotating discs are arranged at the front end and the rear end in the fixed bin, the rotating disc on the front side is fixedly connected with the inner wall of the shell, the rotating disc on the rear side is fixedly connected with the inner wall of the fixed bin, and a plurality of sliding clamping assemblies are arranged between the two rotating discs; a spiral rubber belt is fixedly connected between the front rotating disc and the rear rotating disc. According to the interventional guide wire clamping device, uniform clamping force can be applied to an interventional guide wire, a buffer structure is arranged at the clamping position of the guide wire, damage to the interventional guide wire caused by too large clamping pressure can be reduced, the interventional guide wire is supported and limited in multiple directions, deviation and shaking of the interventional guide wire are reduced, and follow-up surgical treatment is facilitated.

The invention relates to the technical field of foam pumps, and discloses an impeller and a foam pump, the impeller comprises a front ceramic piece, a rear ceramic piece and a metal framework, the front ceramic piece comprises a front cover plate, blades and guide blades which are connected in sequence; the rear ceramic piece comprises a rear cover plate, the rear cover plate is arranged on the side, away from the blades, of the front cover plate and spliced with the front cover plate, and a fixing cavity is formed between the rear cover plate and the front cover plate. The metal framework comprises a first supporting piece, a second supporting piece and a third supporting piece which are connected, the first supporting piece is arranged in the fixing cavity, the second supporting piece is embedded in the blade, and the third supporting piece is embedded in the guide blade. According to the invention, the front ceramic piece and the rear ceramic piece are respectively and integrally formed, and when the front ceramic piece and the rear ceramic piece need to be connected, the front cover plate and the rear cover plate are spliced; after the front ceramic piece and the rear ceramic piece are integrally formed respectively, the metal framework is embedded into the blades and the guide vanes, and then the front cover plate and the rear cover plate are spliced.

The invention relates to the technical field of thermal insulation materials, in particular to a ceramic gel phase change energy storage self-thermal insulation structure and a preparation method thereof.Silicon dioxide sol and zirconium dioxide sol are mixed and then added with paraffin to prepare a phase change material, and the phase change material has the effects of enhancing the heat conduction performance and improving energy storage; the silicon dioxide and the zirconium dioxide both have good heat conduction performance, the heat conduction efficiency of the paraffin serving as the phase change material can be remarkably improved by mixing the silicon dioxide and the zirconium dioxide with the paraffin, heat can be transmitted and distributed in an energy storage structure more quickly, and the porous structure with high porosity serves as a carrier to bear the phase change material; the uniform distribution of heat can be facilitated, so that the heat-conducting property of the energy storage structure is further enhanced; the carbon fibers and the steel fibers are dispersed in the polyvinyl chloride to improve the strength of the polyvinyl chloride, and then the surface of the ceramic gel structure is coated with the polyvinyl chloride to package the phase-change material in the porous ceramic, so that the situation of leakage or performance degradation of the phase-change material is prevented to a certain extent.

The invention discloses novel copper plate strip alloy composition heat treatment equipment, and relates to the technical field of copper plate strip alloy heat treatment.The novel copper plate strip alloy composition heat treatment equipment comprises a fixing frame, a heating furnace is installed on the upper surface of the fixing frame, and a feeding port and a discharging port are formed in the two ends of the heating furnace respectively; according to the equipment, copper plate strip alloy is conveyed into the heating furnace at a constant speed, it is guaranteed that the standing time of the copper plate strip alloy in the heating furnace is consistent, then the time of heat treatment on the copper plate strip alloy in the heating furnace is the same, and different positions of the copper plate strip alloy are subjected to heat treatment with the same effect; and the end, entering the heating furnace, of the copper strip alloy is always located on the same horizontal plane as the feeding port of the heating furnace, so that the copper strip alloy is prevented from being bent or twisted due to the fact that the height of the end, entering the heating furnace, of the copper strip alloy is different from that of the feeding port, and material deformation is prevented.

The invention discloses an evaporative crystallization device based on high-concentration wastewater and a zero discharge process, and relates to the technical field of wastewater treatment.The evaporative crystallization device based on the high-concentration wastewater comprises an evaporation tank, and a drainage device is arranged in the evaporation tank; the flow guide device comprises a heat conduction inner barrel fixed in the evaporation tank, an inner ring channel formed in the center of the heat conduction inner barrel, a flow guide pipe fixed in the inner ring channel and a plurality of groups of outer ring channels formed in the heat conduction inner barrel, and the plurality of groups of outer ring channels are sequentially formed from inside to outside by taking the inner ring channel as the center; first water outlets which are arranged up and down are formed between the inner ring channel and the adjacent outer ring channel, and second water outlets are formed between the other outer ring channels. By arranging the drainage device, when entering the evaporation tank, wastewater can sequentially pass through the multiple groups of outer ring channels along the inner ring channel in an S-shaped trend so as to diffuse and flow towards the periphery, so that disorder and stagnation of flow in a traditional system are avoided, and continuous flowability of the wastewater is ensured.

The invention relates to the technical field of fused alumina zirconia bricks, in particular to a fused alumina zirconia refractory brick and a preparation technology.The fused alumina zirconia refractory brick is prepared from, by weight, 55-65 parts of alumina powder, 25-35 parts of zircon sand, 1-5 parts of modified nanometer alumina powder, 2-6 parts of binder, 1-2 parts of chromic oxide, 1-3 parts of yttrium oxide and 1-4 parts of fluxing agent. Through in-situ growth of a layer of carbon nanotube core-shell structure on the surface of nano-alumina, the core-shell structure can prevent direct contact between nano-alumina particles, so that the possibility of nano-alumina agglomeration is reduced, and nano-alumina is uniformly distributed in the corundum amorphous refractory brick. A finer dispersed phase is formed in the brick body, so that the expansion of cracks is hindered, and the toughness and the strength of the brick body are improved.

The invention belongs to the technical field of seed crystal manufacturing, and particularly relates to a high-strength seed crystal for large-diameter monocrystalline silicon and a preparation method thereof.The high-strength seed crystal for the large-diameter monocrystalline silicon is prepared from, by weight, 30 parts of first seed crystal area silicon liquid, 20 parts of second heavily-doped area silicon liquid and 10 parts of third lightly-doped area silicon liquid; the unique partition design is adopted to improve the performance of the high-strength seed crystal for the large-diameter monocrystalline silicon; in the first seed crystal area, silicon carbide reacts with silicon at high temperature to introduce elemental carbon which hinders dislocation, enhances grain boundary and improves strength and toughness; the seed crystal quality is improved by means of high thermal conductivity; meanwhile, silicon nitride is introduced to generate Si2N2O under the oxygen-deficient condition, and the Si2N2O and elemental carbon form a covalent bond; in the second seed crystal region, heavy doping atoms are introduced to form defects, the combination with carbon in the first seed crystal region is strengthened, sites are provided for light doping in the third seed crystal region, heavy doping and light doping are combined, and the negative influence of heavy doping on the quality of monocrystalline silicon is avoided.

The invention relates to the technical field of nano material preparation, and discloses an emulsified nano calcium carbonate preparation device which comprises a processing tank, a sealing mechanism is arranged at the top of the processing tank, a feeding mechanism, a stirring mechanism and a circulating mechanism are arranged on the sealing mechanism, and a cleaning mechanism and a fixing mechanism are arranged outside the processing tank. And a discharging mechanism is arranged at the bottom end of the processing tank. The possibility of particle aggregation is effectively reduced through the stirring mechanism, an emulsification system with more uniform particle size distribution can be obtained, waste heat recycling is achieved through the circulating mechanism, heat is prevented from being directly dissipated to the external environment and wasted, the energy utilization rate is effectively increased, and finally through the cleaning mechanism, the energy utilization rate is increased. The timely cleaning mode can prevent the situation that nano calcium carbonate is attached to the tank wall for a long time and becomes more difficult to clean, the inner wall of the processing tank is kept relatively clean all the time, and the overall production efficiency is improved.

The invention discloses a contact back pressure dynamic control device and method based on a cone yarn integral calculation model. The contact back pressure dynamic control device comprises a rotating arm, a friction roller, a torsion rotating shaft, a base and a torque control assembly, the friction roller is rotationally connected to the base; the torsion rotating shaft is rotationally connected to the base through a bearing frame. The rotating arm is U-shaped and comprises a connecting beam and two side arms which are parallel to each other; the connecting beam is fixed with the torsion rotating shaft; a spool dismounting structure is arranged between the outer ends of the two side arms; by means of the mode of dynamically adjusting the output torque of the motor, contact back pressure fluctuation caused by increase of the weight of cone yarn is dynamically compensated; compared with a traditional mechanical spring contact back pressure balancing method, the method has the advantages that the contact back pressure of cone yarn winding forming can be accurately controlled to be maintained at a preset constant value in real time, it is guaranteed that yarn is evenly stretched and transmitted, and therefore the stability and uniformity of yarn winding are guaranteed.

The invention discloses a raisin sterilization device with a self-adaptive sterilization function, and relates to the technical field of sterilization, the raisin sterilization device comprises a shell, the inner wall of the shell is fixedly connected with a temperature and humidity sensor, the inner wall of the shell is provided with an anti-adhesion mechanism for preventing raisin adhesion, and the shell is internally provided with a humidity control mechanism for removing water drops on the inner wall of the shell; the anti-sticking mechanism can shake raisins in high-pressure sterilization, the raisins can be continuously changed in position in the sterilization process through shaking, the raisins are prevented from being in a fixed stacking state for a long time, heat can be more uniformly transmitted to each raisin, the uniformity and thoroughness of sterilization are improved, and the quality of the raisins is improved. The humidity control mechanism can be used for scraping and collecting water drops adhered to the inner wall of the sterilization device, so that the situation that the water drops on the inner wall of the device drop onto the raisins, the local temperature is reduced, and the sterilization uniformity and effect are influenced can be avoided, and the sterilization quality is further improved.

The invention relates to the technical field of environmental protection, and discloses a thermal power plant smoke dust treatment device which comprises a bottom plate, a filter box is fixedly connected to the top of the bottom plate, an air inlet pipe is fixedly connected to the left side of the filter box, a fan is fixedly connected to the top of the bottom plate, and an air suction pipe is fixedly connected between the fan and the filter box. According to the system, heat in the flue gas can be effectively recycled through the treatment mechanism to heat water in the water storage tank, so that the energy utilization efficiency of the whole system is improved, energy waste is reduced, the production cost is reduced, the requirement for additional energy can be reduced by recycling the heat in the flue gas, and the energy utilization rate of the system is improved. The device is simple in structure and convenient to operate, emission of greenhouse gas and other pollutants can be reduced, the environment-friendly requirement for energy conservation and emission reduction is met, meanwhile, heat of the flue gas is transmitted to water in the water storage tank, the temperature of the flue gas can be reduced, heat loads on follow-up flue gas treatment equipment can be reduced, the service life of the equipment is prolonged, and the maintenance cost of the equipment is reduced.

The invention relates to the technical field of soil remediation, and discloses a soil remediation device and a soil remediation method.The key point of the technical scheme is that the soil remediation device comprises a remediation box body; the repairing platform is arranged in the repairing box body, a heating part used for generating heat is arranged at the bottom of the repairing platform, and the repairing platform conducts the heat; the feeding hole is formed in one side of the repairing box body and is connected with a feeding machine; the preheating box body is arranged in the repairing box body, and a plurality of crushing rollers are arranged in the preheating box body; the vibration frame body is arranged at the bottom of the preheating box body, and a plurality of release plates are arranged in the vibration frame body; according to the device, the problems of blockage and low efficiency when high-water-content or high-viscosity soil is treated in a traditional technology are solved by optimizing multiple functions of preheating, crushing, vibrating, releasing, paving and the like. The device is reasonable in structural design, efficient in treatment process and capable of being widely applied to pollution remediation of various complex soil environments.

The invention provides a grain germination method and germination equipment. The grain germination method comprises a first step of promoting germination. The first step comprises a soaking stage and a germination stage. In the soaking stage, accumulated water is formed in the containing container to soak the grains in the containing container. In the germination stage, accumulated water in the containing container is discharged so that the grains can germinate in the containing container. The container is provided with a normally-open water outlet which is kept open, and the normally-open water outlet is configured in the mode that in the soaking stage, the water injection flow of the container is larger than the water drainage flow of the normally-open water outlet so that accumulated water can be formed, and in the germination stage, the accumulated water is drained through the normally-open water outlet. According to the grain germination method provided by the invention, the grains absorb water and are infiltrated in a soaking manner, and a large amount of grains can also be soaked, so that the grain germination method is suitable for equipment with a large one-time germination amount. In addition, flowing soaking is achieved through a normally-open water outlet, the soaking uniformity is better, and meanwhile the problem that the taking and placing freedom degree of the containing container is limited due to the fact that the containing container is connected through a valve structure in germination equipment is solved.

The ceramic packing sintering furnace comprises a furnace shell, a movable cover and a fixed cover are arranged at the two ends of the furnace shell correspondingly, the movable cover communicates with an outer air inlet pipe, the fixed cover communicates with an outer exhaust pipe, and a heat preservation shell is arranged in the furnace shell; a positioning ring A and a positioning ring B which are fixed to the two ends of an inner cavity of the furnace shell are rotationally arranged at the two ends of the heat preservation shell respectively, a heating wire set is arranged in the heat preservation shell, a hearth with the two ends connected with the positioning ring A and the positioning ring B respectively is erected on the inner side of the heat preservation shell, a storage rack is arranged in the hearth, and a heat transfer plate is arranged on the hearth. The defects in the prior art are overcome, the heat conduction area and the sintering area of the sintering furnace are separated and partitioned, it is avoided that dust generated by ceramic filler sintering is attached to and accumulated on the surface of heating equipment to affect the heat transfer efficiency, it is also avoided that the heating equipment is damaged by the dust, and the high social use value and application prospects are achieved.

The utility model discloses centrifugal compound solid-liquid separation equipment and belongs to the technical field of solid-liquid separation. Comprising a separation main body of which the upper end is provided with an adding disc, a plurality of solid-liquid separation cylinders connected with the adding disc through connecting pipes, and centrifugal separation assemblies arranged in the solid-liquid separation cylinders; a compound solution needing solid-liquid separation is equivalently dispersed into the multiple centrifugal barrels through the adding disc, batch centrifugal solid-liquid separation is carried out, a large amount of compound solution can be treated at the same time, meanwhile, the inner walls of the centrifugal barrels are further sprayed with corrosion-resistant materials, centrifugal force at a high rotating speed and possible corrosive liquid can be tolerated, and the service life of the centrifugal barrels is prolonged. The stable operation and the separation efficiency of the equipment are ensured; the solid-liquid separation barrel and the centrifugal barrel are arranged to be of a downwards-inclined structure, so that solid particles with large density can move towards the barrel wall of the centrifugal barrel more easily along the inclined face and deposit through the gravity effect, and the solid and liquid separation process is accelerated.

The present invention relates to the technical field of medical devices, and specifically to a self-expanding drug-coated vascular stent, which is a mesh tube structure formed by connecting a plurality of main ribs and a plurality of connecting ribs, wherein the plurality of main ribs are evenly distributed along the circumference, and two adjacent main ribs are connected by connecting ribs; when the mesh tube structure is in an expanded state, the main ribs extend in a sinusoidal waveform, the connecting ribs extend in the same direction as the main ribs, the connecting ribs are connected to the side of the main ribs where the crest or trough is protruding, one side of the same connecting rib is connected to the crest of a main rib, and the other side of the connecting rib is connected to the trough of another adjacent main rib; when the mesh tube structure is in an unfolded and flattened state, the plurality of main ribs are parallel to each other, and the connecting ribs extend in a fishbone shape along the extension direction of the main ribs. Different branch ribs of the connecting ribs exert force on the main ribs, so that the axial flexibility of the vascular stent is better, and the instantaneous non-uniform expansion phenomenon of the vascular stent during the expansion process can be effectively alleviated, and the wall adhesion of the stent after implantation can be ensured.

The utility model provides an auxiliary device for installing a pipeline in a narrow space, belongs to the technical field of building construction, and provides the following technical scheme mainly aiming at the problem that the pipeline is difficult to be heated uniformly when the existing water pipeline is heated, softened and butted. Comprising two sets of mounting frames, sliding through grooves are formed in one sides of the two sets of mounting frames, two sets of clamping jaws are slidably mounted in the two sets of sliding through grooves correspondingly, a first mounting groove is formed in the top of one set of clamping jaws, a heater is mounted in the first mounting groove, one side of the heater makes contact with a vapor chamber, and the other side of the heater makes contact with the vapor chamber. By combining the heater with the clamping jaw, the auxiliary device for installing the pipeline in the narrow space can uniformly heat and soften the water pipe, can also adapt to water pipes of different sizes, and solves the problems that when an existing water pipe is heated, it is difficult to ensure that the pipeline is uniformly heated, and the pipeline is not uniform in heating. And construction by operators is not convenient.

The utility model discloses a large-span bridge-floor-free simply-supported tied arch bridge which comprises bridge piers, a first main arch and a second main arch. The first main arch and the second main arch are arranged on the two sides of the arch bridge. The bridge piers are arranged at the two ends of the first main arch and the two ends of the second main arch and connected with the first main arch and the second main arch through supports. The first main arch and the second main arch are each of a four-steel-pipe truss type structure. A first wind brace and a second wind brace are fixedly arranged between the first main arch and the second main arch, straining beams are arranged on the two sides of the arch bridge in the length direction, and a cross beam is arranged between the straining beams on the two sides of the arch bridge and used for bearing a coal conveying pipe belt machine. And suspenders are respectively arranged between the straining beam and the first main arch and between the straining beam and the second main arch. The steel consumption of the large-span arch bridge is reduced, the four-steel-pipe truss type main arch is adopted, the rise of the main arch is reduced, and the transverse stability of the structure is improved; and the suspender tensioning procedure is simplified, and the construction difficulty is reduced.

The utility model relates to the technical field of refrigerators, and discloses a drawer assembly. The drawer assembly comprises a drawer frame, a drawer front cover and a drawer handle. The drawer front cover is clamped with the front side wall of the drawer frame; the rear side wall of the drawer handle is clamped with the drawer front cover, the lower end of the drawer handle is embedded in the drawer front cover, and two ends of the drawer handle are clamped with the drawer frame. In the application, under the condition that more articles are stored in the drawer frame, the drawer handle is pulled, the two ends of the drawer handle directly pull the drawer frame, and the drawer handle indirectly pulls the drawer frame through the drawer front cover. The drawer handle transmits pulling force to the drawer front cover at the same time through the clamping connection position and the embedding connection position of the drawer handle and the drawer front cover, the pulling force is transmitted evenly, part of the pulling force on the drawer handle is directly transmitted to the drawer frame, the stress strength of the drawer front cover is reduced, and the risk that the drawer front cover is separated from the drawer handle is reduced. The utility model further discloses the refrigerator.

The utility model relates to a plate type heat exchanger unit which comprises a placing seat, a left pressing plate, a right pressing plate and a plurality of plate sheets, a high-temperature water inlet pipe and a high-temperature water outlet pipe are arranged on the left pressing plate, and a low-temperature water inlet pipe and a low-temperature water outlet pipe are arranged on the right pressing plate; the left pressing plate and the right pressing plate are arranged on the placing seat; an annular groove is formed in one side of the plate piece, an annular boss is arranged on the other side of the plate piece, and the shape of the annular boss is matched with that of the annular groove. During fitting, the annular bosses are inserted into the annular grooves in the adjacent plate sheets; the locking mechanism comprises a screw rod, a screw head, a pressure spring, a fastening nut and a backing ring; the screw head is fixed at one end of the screw rod; the screw rod penetrates through the through hole; the compression spring, the backing ring and the fastening nut are arranged at the other end of the screw in a sleeving mode, one end of the compression spring abuts against the side face of the left pressing plate or the side face of the right pressing plate, and the other end of the compression spring abuts against the backing ring; the problems of loose connection and leakage between the plates caused by alternate cooling and heating and thermal expansion and cold contraction of the plates are solved.

This utility model relates to the field of spillway tunnel support technology, specifically a reinforcement support device for spillway tunnel excavation. It includes a fixed frame, with lifting blocks bolted to both ends of the fixed frame. A support block is slidably connected to the lower end of each lifting block, and a support base is fixed to the lower end of each support block. Multiple brackets are fixed to the top surface of the lifting blocks. Connecting seats are fixed to the outer ends of the brackets and both ends of the top surface of the fixed frame. Arc-shaped blocks are bolted to the connecting seats. A first pressure-relief block is fixed between two adjacent arc-shaped blocks. A second pressure-relief component is installed at the end of each bracket near the arc-shaped block. A connecting component, including an insert block, is installed on the arc-shaped block. The first pressure-relief block between adjacent arc-shaped blocks and the second pressure-relief component at the end of the bracket undergo controllable limited deformation, absorbing the energy released by the surrounding rock while maintaining stable support for the surrounding rock. This reduces the rigid stress on the structure, decreases brittle failures such as retaining wall cracking, support bending, and joint collapse, and lowers the risk of collapse.

The utility model discloses a synthetic wood board drying device which comprises a conveying mechanism, a drying chamber is arranged on the conveying mechanism, a steam inlet is formed in one side face of the drying chamber, a steam outlet is formed in the other side face of the drying chamber, a steam channel is arranged inside the inner wall of the drying chamber, and the steam channel is communicated with the drying chamber. A plurality of groups of curing lamps are mounted on the inner side surface of the top of the drying chamber; air is heated through steam, the steam can transfer heat evenly, the air is heated evenly, the problems of local overheating and uneven heating in the electric heating drying process are avoided, and no gas flows substantially in the steam heating drying process, so that a paint surface can be solidified evenly to form a flat and smooth paint surface; when air is heated through steam to dry the wood board, the multiple sets of curing lamps are powered on to light and irradiate the paint surface of the synthetic wood board, photochemical reaction is carried out, curing of the paint surface is accelerated, and the drying efficiency of the synthetic wood board is improved.