14 results about "External Powder" patented technology

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

The utility model relates to the technical field of calcium silicate composite boards, in particular to a calcium silicate composite board with a high-temperature metal powder coating, which comprises a calcium silicate layer, a bonding layer, a metal thin layer and a powder coating which are sequentially arranged from bottom to top, the thickness of the powder coating is 80-200mu m, and the surface hardness of the powder coating is 3-8H; by coating the surface of the calcium silicate layer with the bonding layer, the metal thin layer is attached to the surface of the calcium silicate layer to form the semi-finished product, namely, the metal surface is formed on the surface of the calcium silicate layer, so that the semi-finished product has metal conductivity; the surface of the metal thin layer is evenly coated with external powder in an electrostatic spraying machining mode, the powder coating is formed after high-temperature curing, and the calcium silicate composite board with the high-temperature metal powder coating is formed, so that the requirements for corrosion resistance, moisture resistance and weather resistance of a wall decoration material are met, the hardness of a veneer is improved, and the use requirements for wear resistance and easy cleaning are met.

A pet freeze-drying powder spraying mechanism comprises a conveying belt, two sealing pipelines are arranged above the conveying belt in the conveying direction in a spaced mode, and the ends of openings of the two sealing pipelines are connected to an external powder spraying main machine through control pipelines; a plurality of powder spraying mechanisms are arranged below the sealing pipelines at intervals in the direction perpendicular to the conveying direction of the conveying belt, and the multiple powder spraying pipelines of the two sealing pipelines are obliquely arranged in the direction facing the control pipeline and the direction away from the control pipeline correspondingly. The conveying belt is further provided with guide separation blocks in front of the sealing pipeline, and the multiple guide separation blocks are arranged in the direction perpendicular to the conveying direction of the conveying belt. Different from a conventional powder rolling mode, the requirement for covering the freeze-dried powder on the surface of the freeze-dried pet can be met, and the requirement for covering different types of freeze-dried powder can be met not limited to the same type of freeze-dried powder.

The application discloses a coal-powder storage and release mechanism-based thermal power generating unit control method and system, and relates to the technical field of electric power energy production and heat supply. According to historical power grid load data, historical electric power market transaction information and weather forecast information, a power grid load prediction result in a future time period is predicted; according to the power grid load prediction result in the future time period and current time boiler state data, pulverizing state data and external coal bunker state, a control strategy is determined; the control strategy is a coal-powder storage strategy or a release strategy; in the case that the control strategy is the coal-powder storage strategy, a pulverizing system and a powder feeding device are controlled to store coal powder in an auxiliary external powder bunker to a target storage amount; in the case that the control strategy is the release strategy, a release instruction is sent to the auxiliary external powder bunker, so that the auxiliary external powder bunker delivers coal powder to a boiler of the thermal power generating unit according to the release strategy. The method can accurately regulate and control the thermal power generating unit.

This invention relates to the field of laser printing rapid prototyping technology, and discloses an external powder feeding mechanism on the side wall of a 3D printing metal laser melting device. The mechanism includes a material cylinder and a spiral blade rotatably disposed within the cylinder. The output end of the material cylinder is connected to a laser printing head, and the input end of the material cylinder is connected to a filling hopper via a fixed component. The device also includes: an anti-caking section comprising a partition fixedly connected through the filling hopper, and an inner plate movably disposed through the partition; a toothed plate fixed to the partition and movable teeth fixed to the inner plate; and a driving component connected to the partition to push the movable teeth to break up agglomerates; an anti-static section comprising a hollow chamber inside the partition, toothed blocks, and movable teeth, and multiple exhaust ports evenly distributed through the movable teeth; and an air supply component connected to the driving component to prevent static electricity buildup; and a filtration section comprising a soft magnetic tape rotatably disposed via gear transmission, and a filter screen disposed below the partition and inner plate; and a scraping component to separate metal powder and impurities.

The utility model discloses a powder pumping device with a quick connection structure, which comprises a powder pumping device body and a powder outlet pipe, the powder pumping device body is connected with the powder outlet pipe through a flange at a pipe body of the powder pumping device body, the powder pumping device further comprises a sleeve rotating head and a connection rotating head, the sleeve rotating head is sleeved outside the pipe body of the powder outlet pipe in a clamping mode, and the connection rotating head which abuts against a flange plate at one end of the powder outlet pipe is connected in the sleeve rotating head in a rotating mode. The sleeve rotating head is arranged at the powder outlet pipe of the powder pumping device body, the butt-joint connecting rotating head is arranged at the sleeve rotating head in a matched mode, after the sleeve rotating head is assembled outside a pipe body of the powder outlet pipe, the connecting rotating head can be assembled outside the powder conveying pipeline, and then the connecting rotating head can be connected into the sleeve rotating head in a rotating mode to sleeve and cover a flange plate of the powder conveying pipeline and a flange plate of the powder outlet pipe. And the half connecting pipe A and the half connecting pipe B form an external thread connecting pipe which is sleeved outside flange plates of a powder conveying pipeline and a powder outlet pipe, so that the powder outlet pipe of the powder pumping device body can be quickly connected with an external powder conveying pipeline.

This invention belongs to the field of material surface modification and thermal spraying technology, and provides a method for preparing a semi-ceramic coating to enhance the bonding strength of a resin surface. The method includes: preparing a composite powder using Al2O3, phenolic resin, and hexamethylenetetramine; for a cured glass fiber reinforced epoxy resin matrix, while preserving the integrity of the internal glass fiber structure, performing laser texturing pretreatment on the matrix surface to form regularly arranged micron-level concave-convex patterns; and using a supersonic plasma spraying process, spraying the composite powder onto the treated matrix surface via external powder delivery to form a semi-ceramic coating. This invention, through synergistic control of the laser texturing morphology and spraying heat input, can achieve dual enhancement of mechanical interlocking and interfacial compatibility. The resulting coating has a bonding strength with the resin matrix of no less than 20 MPa, and the interface is free of ablation or cracks. This method is particularly suitable for aerospace, electronic packaging, and other fields.

The invention relates to a multi-channel discharge detection and control method and device in electric spark mirror finishing, which are applied to the technical field of electric spark mirror finishing, and comprises the following steps of: realizing accurate identification of single-channel, multi-channel and abnormal discharge states through discharge current rising edge and discharge voltage breakdown delay detection; different control actions are set according to different working modes, so that the aim of automatically increasing, reducing or maintaining the concentration of the carbon powder is fulfilled; the limitation of traditional control depending on manual experience is overcome, and the machining stability and universality are improved; carbon powder and metal filing powder are automatically generated through a reverse repair tool electrode, the number density of free electrons of the machining fluid is improved, conversion from single-channel discharge to multi-channel discharge is promoted, discharge energy is dispersed, large-area mirror machining in common machining fluid is achieved, external powder does not need to be additionally added, and the powder separation problem of mixed powder machining fluid is solved.

The utility model relates to carbon powder box structure technical field, concretely is a kind of carbon powder box structure of large capacity, including carbon powder box ontology, the surface of carbon powder box ontology is equipped with connecting frame, the surface of connecting frame is provided with first side cover, the inside of carbon powder box ontology and the surface of connecting frame are provided with increase powder amount mechanism, the surface of powder adding port is provided with external powder adding mechanism. The utility model not only makes carbon powder box structure when using can accommodate more carbon powder, improves work efficiency, also can guarantee the printing quality of printer, reduces the downtime caused by replacing carbon powder box ontology, and makes carbon powder box structure when using need not to take down second side cover from the surface of carbon powder box ontology, the inside of carbon powder box ontology is added powder, so that carbon powder box structure is more convenient operation when using, and, can guarantee the sealing property of carbon powder in the inside of carbon powder box ontology.

Provided is a sprayed powder recovery anti-explosion safety device. Relates to the technical field of powder spraying equipment. The device is arranged on the inner side of a recovery tank, a powder suction pipe is arranged on the top of the recovery tank, an exhaust pipe is arranged at the bottom of the recovery tank, the powder suction pipe is used for sucking external sprayed powder into the inner side of the recovery tank, the device comprises a spraying mechanism and a material receiving mechanism, and the spraying mechanism comprises a mounting ring and a plurality of spraying heads arranged at the bottom of the mounting ring; the plurality of spray heads form a water curtain in the recovery tank; the material collecting mechanism comprises a material collecting hopper, the mounting ring is arranged on the upper portion of the inner side of the recycling tank, the material collecting hopper is arranged on the lower portion of the inner side of the recycling tank, and the sprayed powder penetrates through the water curtain and falls into the inner side of the material collecting hopper. According to the spraying device, through the spraying effect of the spraying mechanism on the sprayed powder sucked into the recycling tank, rapid sedimentation of the sprayed powder is promoted, then the dust concentration of the sprayed powder in the recycling tank is reduced, and dust explosion is prevented.

The application relates to a preparation method of a high-hardness high-temperature steam oxidation-resistant composite structure coating, which comprises the following steps: S1, pretreating the surface of a workpiece needing to prepare a coating; S2, preparing an aluminum-containing nickel-based or aluminum-containing cobalt-based metal primer layer with a thickness of 80-150 microns on the surface of the workpiece; and S3, selecting a suspension liquid with a certain proportion and content of yttrium silicate, alumina micropowder and an organic solvent as raw materials, and preparing a ceramic top layer with a thickness of 100-350 microns on the surface of the primer layer by adopting an atmospheric plasma spraying technology in an external powder feeding mode. The preparation method can regulate the wear resistance of the coating, meanwhile, the cracking and peeling phenomena caused by thermal stress during the heating and cooling processes of the coating can be avoided, and the long-acting high-temperature steam corrosion resistance of the coating can be realized.

The plasma spray gun applying the high-ignition-point graphite boat coating comprises a nozzle, a powder inlet hole is formed in the side wall of the nozzle, the nozzle is sleeved with a powder feeding frame, the powder feeding frame is provided with a through hole corresponding to the powder inlet hole, the powder feeding frame is connected with a powder feeding needle sleeve, and a needle tube of the powder feeding needle sleeve penetrates through the through hole of the powder feeding frame and is inserted into the powder inlet hole of the nozzle. According to the internal powder feeding device, zirconium oxide powder enters flames in advance through the internal powder feeding design, compared with an external powder feeding mode, powder melting is good, meanwhile, airflow of the internal powder feeding device forms rotating airflow, it is guaranteed that powder materials are more concentrated to form a compact coating, and therefore the powdering rate is better improved.

The invention discloses an efficient grading jet mill, which belongs to the technical field of jet milling and comprises a grinding mechanism, an efficient grading mechanism, a collecting assembly and a plurality of support frames, the grinding mechanism, the efficient grading mechanism and the collecting assembly are installed on the supporting frame. The grinding mechanism comprises a grinding cylinder and an airflow crushing assembly, the feeding pipeline is fixedly connected with the grinding cylinder, one end of the feeding pipeline is communicated with an external powder conveyor, and the other end of the feeding pipeline penetrates through the grinding cylinder; the grinding cylinder is connected with the airflow crushing assembly; the efficient grading mechanism is mounted on the upper side of the grinding cylinder; the efficient grading mechanism comprises a grading assembly and a material returning assembly, the grading assembly is installed on the upper side of the grinding cylinder, and the material returning assembly is installed on the grinding cylinder; the grading assembly is connected with the collecting assembly. By means of the mode, the material returning assembly recycles materials graded through the grading assembly in a unified mode and then feeds the materials to the lower side of the grinding cylinder again, and the situation that large-particle materials directly fall down in the grinding cylinder and interfere with ascending airflow is avoided.

This utility model discloses a uniform powder-spreading device, relating to the field of food processing technology. It includes a mounting block, characterized in that: a drive motor is mounted on the lower end of the mounting block; a rotating plate is fixedly connected to the output end of the drive motor; a limiting plate is provided below the rotating plate; a spiral groove is formed on the limiting plate; a slider is slidably connected to the lower end of the rotating plate; a sliding column corresponding to the spiral groove is fixedly connected to the lower end of the slider; a powder spraying head is rotatably connected to the lower end of the sliding column, and the powder spraying head is located below the limiting plate; a pipe is connected to one side of the powder spraying head, and the other end of the pipe is connected to an external powder spraying pump. The beneficial effects of this utility model are: this structure facilitates uniform powder spreading within a circular area, allows for adjustment and adaptation for uniform powder spreading, and provides more flexible powder spreading.