38results about How to "Uniform and stable discharge" patented technology

The invention relates to a dielectric barrier discharge low-temperature plasma harmful gas converter, which belongs to the technical field of control of industrial waste gas and harmful emission of motor vehicles, wherein a low-temperature plasma reactor (7) of the dielectric barrier discharge low-temperature plasma harmful gas converter is a coaxial tubular dielectric barrier discharge low-temperature plasma reactor, and consists of a central low-voltage electrode (17), a quartz dielectric (15) which is coaxial with the central low-voltage electrode (17), a high-voltage electrode (16) which is packed on the outer wall of the dielectric, a polyfluortetraethylene connecting rod (14), a front end cover (11), a rear end cover (18), a front end cover air inlet interface (10), a rear end cover air outlet interface(19), a selectable air inlet and outlet interface (20), and a low-temperature plasma reaction zone which is formed by gaps between the outer wall of the central low-voltage electrode (17) and the inner wall of the quartz dielectric (15). The dielectric barrier discharge low-temperature plasma harmful gas converter has high treatment efficiency, simple equipment and no secondary pollution, does not need subsequent treatment, is easy to operate, and is suitable for treating harmful substances such as NO, CO, HC, H2S and PM.

The invention discloses a gas laser, which comprises a discharge chamber, a discharge electrode, a water-cooling channel and a gas storage chamber, wherein the water-cooling channel is distributed on the ektexine of the discharge chamber, the gas storage chamber is positioned outside the water-cooling channel, the discharge chamber and the gas storage chamber are communicated through a muffler, the discharge chamber is a sealed cavity which consists of a discharge cavity, a strip-shaped reflector on a tail end mirror, a strip-shaped reflector on an output end and a full-through output mirror, the discharge cavity is in a lath-shaped hollow-core structure which is made of nonmetal materials, the tail end mirror, the strip-shaped reflector on the output end are respectively positioned on the front end and the rear end of the discharge cavity, an aperture is left on the middle or one side of the strip-shaped reflector of the output end, the full-through output mirror is positioned at the position of the aperture and is used as a laser output window, and the discharge electrode is poisoned in the front end and rear end of the discharge cavity, or in the left side and the right side of the discharge cavity. The gas laser has small size, light weight, simple structure, a cooling system with good cooling effect, high output power and stable laser beam with good mode, and can be used for the laser processing industry.

The invention discloses a double-medium low-temperature plasma generator, which comprises two end plugs with annular grooves inside, reduces a back pressure of an air intake pipe, enables gas flow to be smoother, and prevents a harmful gas from corroding an electrode as a discharge gap is composed by two layers of quartz glass tubes. The scheme of the double-medium low-temperature plasma generator is as follows: when a gas enters into the end plugs from the air intake pipe, the gas is firstly full of the annular grooves, and further uniformly enters into a discharge region, so that circulation performance and uniformity of the gas are improved, and blockage of the inner parts of the end plugs due to particle deposition is avoided; the discharge region is located between the two layers of the quartz tubes, and the gas flows through the discharge region and does not contact directly with the electrode, so that electrode corrosion is avoided. The double-medium low-temperature plasma generator can be widely applied to the field of harmful emission control of engines.

The invention discloses a welding method of a spiral welded pipe, which is characterized in that an extrusion device is firstly used for extruding the inner surfaces of steel plates at the two sides of a non-welded seam to eliminate uneven bulges and ensure that the inner sides of the steel plates at the two sides of the non-welded seam are clean and smooth, and then welding is carried out. At the same time, the extrusion device further serves as a location device of a welding head, namely, the extrusion device is used for tightly fixing the welding head and the extrusion device together to ensure that the welding head also can correctly move along the non-welded seam when the extrusion device moves along the non-welded seam, and thus, the welding head is ensured to be located at the middle position of the seam all the time. Accordingly, the quality of the seam automatically welded by a production line is guaranteed to be stable and excellent, and manual repair is basically not needed.

A flexible electrode electrospark deposition composite rolling machining tool includes a bearing plate, a rolling knife spindle, a rotating disk, pin rollers, an electrode spindle, a rotating joint, and a flexible electrode; the rolling knife spindle is rotatably mounted on the right side of the bearing plate, the pin rollers are rotatably mounted on the rotating disk, and the rotating disk is rotatably mounted on the lower end of the rolling knife spindle through an annular cover; the electrode spindle is rotatably mounted on the left side of the bearing plate, and the flexible electrode is mounted on an electrode clamp in a retractable mode; and the electrode clamp is installed on the lower end of the electrode spindle, and the inner ring of the rotating joint is fixed to the upper end of the electrode spindle. The invention provides the flexible electrode electrospark deposition composite rolling machining tool. The flexible electrode electrospark deposition composite rolling machining tool can be used to prepare a layer of nanocrystal on metal materials and perform flexible electrode electrospark deposition machining at the same time, so that the quality of the material surfaceis greatly improved.

The invention discloses a glue discharging device and a wall face tile gluing paving and pasting robot. The glue discharging device comprises a storage barrel, a pressurizing mechanism, a conveying pipeline and a screw pump assembly. The storage barrel is used for storing tile glue and provided with a glue discharging port communicating with the outside. The pressurizing mechanism is used for pressurizing the interior of the storage barrel so that the tile glue can be discharged out of the glue discharging port. The conveying pipeline is connected with the glue discharging port and used for communicating with the storage barrel and a tile gluing device. The screw pump assembly is arranged at the bottom of the storage barrel, and a screw of the screw pump assembly is arranged to rotate in the conveying pipeline so that the tile glue in the conveying pipe can be discharged to the tile gluing device. According to the glue discharging device, the manner of the joint action of the screw pump assembly and pressurizing is adopted, it can be guaranteed that the tile glue large in viscosity in the storage barrel is evenly and stably discharged, the problem that the sticky tile glue is not prone to being discharged is solved, and the wall face tile paving and pasting efficiency is greatly improved.

The invention discloses a high-precision circuit board electrotinning method. A circuit board comprises micro blind holes or micro through holes. An electrotinning process comprises a pretreatment procedure, an electrotinning procedure and an aftertreatment procedure. A strong and uniform stirring function is achieved on a plating solution through ultrasonic waves in the electroplating process, the surface of a material can keep clean all the time through the function, the tin ion discharge process is uniform and stable, and therefore the uniformity and smoothness of plating are improved; the binding force of the plating is increased through ultrasonic strengthening electroplating, and due to the fact that the surface of the plating keeps clean all the time through the strong and uniform stirring function of the ultrasonic waves, the binding force of the plating is increased; and an additive is adopted, an anionic surfactant of sodium salt of a sulfosuccinate group and oxygen vinyl serves as a dispersing agent, and therefore the comprehensive electroplating performance of an electrotinning solution is remarkably improved, the electrotinning solution has high dispersing performance and excellent ductility, and the quality of the plating is further improved.

The invention discloses a self-control-type storing bin, and relates to the field of storing equipment, in particular to the field of storing bins. A bin body is provided with a discharging outlet inthe bottom, and a closing plug capable of closing the discharging outlet is arranged at the discharging outlet. The closing plug is in a protruded shape in the direction of the discharging outlet, anda plurality of fixing seats are arranged on the side face of the bin body. Electro-hydraulic push rods are further arranged on all the fixing seats, and the tops of telescopic rods of the electro-hydraulic push rods are connected with one side of the closing plug. Signal receiving modules are arranged on electric valves of the electro-hydraulic push rods, and a solid flowmeter is arranged on theinner wall of the discharging outlet and is in signal connection with a control module. The control module is further connected to switches of the electric valves through the signal receiving modules.By using the closing plug, the electro-hydraulic push rods and the solid flowmeter, a stored material is discharged along a gap between the discharging outlet and the protruded closing plug, uniformand stable unloading is achieved, the distance between the discharging outlet and the closing plug can further be controlled according to the detecting result of the solid flowmeter, and thus the purpose of discharging quantity control is achieved.

The invention belongs to the field of microcrystalline materials, and in particular relates to microcrystalline material MgCaO powder as well as a preparation method and an application thereof. The microcrystalline material MgCaO powder is characterized in that the specific gravity ratio of Mg, Ca and O in the MgCaO powder is shown as xMg(1-x)CaxO, wherein x is greater than or equal to 0.04 and less than or equal to 0.3; the MgCaO powder is formed by sintering CaO powder and MgO powder. A microcrystalline material is formed after the MgCaO powder is dissolved in a solvent. When the microcrystalline material containing the MgCaO powder is applied into a plasma panel, the low energy band width is maintained while the stable state of environmental gases is kept. The preparation method is low in cost, simple and easy to operate.

The invention discloses a method for treating Cr(VI)-containing waste water. According to the method, a part of waste water is introduced into a reaction container provided with a medium blocking discharging device; plasmas are conducted to generate a power supply; the reduction is performed on Cr(VI) in the waste water through generating low-temperature plasmas; meanwhile, hydroxyl radical or hydrogen radical type high-energy active particles are generated to obtain the pretreated waste water containing rich active particles; then, the obtained pretreated waste water is fast introduced into the rest part of Cr(VI)-containing waste water to be treated to be proportionally mixed with waste water to be treated; after the reaction, the goal of eliminating Cr(VI) contaminants in the waste water is realized. The method has the advantages that in the whole process, the additional addition of chemical reagents is not needed; the Cr(VI) removal rate being 90 percent or higher can be realized;meanwhile, organic contaminants in the waste water can be eliminated; the energy consumption and cost of the discharging technology applied to Cr(VI) elimination in waste water can be greatly reduced;great industrial application values are realized.

The invention discloses a method for preparing rare earth doped yttrium oxide fluorescent nanoparticles through a DBD technology, and the method comprises the following steps: (1) mixing a substrate metal organic matter and a doped metal organic matter according to a mass ratio of (10-40): 1, and grinding the mixture as a reaction precursor; (2) putting the precursor obtained in the step (1) into a container, and putting the container between the positive electrode and the negative electrode of a plasma reactor; and (3) applying alternating current between the cathode and the anode of the plasma reactor in an oxygen atmosphere, treating the precursor for a period of time, taking out the product every a period of time, and grinding to obtain powder containing the rare earth doped yttrium oxide nanoparticles. According to the invention, powder of rare earth doped yttrium oxide fluorescent nanoparticles is prepared by using a high-activity oxidation component one-step method through a DBD technology. The method is simple and easy to implement, green and efficient, high-temperature and high-pressure further reaction is not needed, and energy consumption is effectively reduced.

The invention discloses a semiconductor air disinfection and purification device of the technical fields of air purification and disinfection. The semiconductor air disinfection and purification device comprises a first ionization module and a light wave catalytic unit, the first ionization module comprises ionization discharge plates and ionization dust collecting plates, the ionization discharge plates and the ionization dust collecting plates are insulated, the ionization discharge plates and the ionization dust collecting plates are respectively connected with pulse ionization high voltage power supplies, the surface of the ionization discharge plates is provided with a plurality of neatly arranged discharge bodies perpendicular to the surface of the ionization discharge plates, air flow guide channels are formed between the discharge bodies and through holes, the discharge bodies are annular lug boss structures, the top ends of the discharge bodies are round planes, the through holes are lug boss hole structures which is formed by deep extending of convex holes, and the discharge bodies and the through holes are in corresponding concentric circle structures. Compared with a traditional structure, an annular discharge structure is adopted, the discharge is more stable, meanwhile the discharge surface is increased, the discharge efficiency is improved, the annular lug boss structure may not be broken, the service life is longer, and the sterilization efficiency is higher.

The invention belongs to the field of surface strengthening and surface modification, and discloses a multi-scale titanium carbide particle reinforced copper-based composite coating and a preparationmethod and application thereof. According to the coating, multi-scale titanium carbide particles serve as a reinforcing phase, copper and a copper-titanium intermetallic compound serve as a matrix, the mass fraction of the titanium carbide particles ranges from 50% to 75%, and the mass fraction of the copper and titanium-copper intermetallic compound ranges from 25% to 50%. The preparation methodof the coating comprises the following steps of clamping a sintered titanium electrode and the copper matrix on a negative electrode and a positive electrode of a spark machine tool correspondingly, immersing the sintered titanium electrode and the copper matrix in a graphene-spark oil mixed medium, and setting spark discharge parameters to prepare the copper-based composite coating containing thelarge-particle-size titanium carbide particles; and then performing aging treatment, and finally obtaining the composite coating. The hardness of the coating is 1100 HV0.2 to 1300 HV0.2, and the coating has the advantages of being low in friction coefficient (0.2-0.32) and low in specific wear rate (1.2-5.8*10<-5 >mm < 3 > N <-1 > m <-1 >) as a wear-resistant coating.

This invention provides a stable and uniform discharging compound electrode structure in a pre-ionized anticyclone large volume composed of a cathode, a ballast medium, a main discharge anode, an insulation medium and a pre-ionized anode, in which, the main discharge anode and the pre-ionized anode are in batten state, the cathode is the improved Ru khodorkovsky electrode, each kind of electrodes is composed of several thin copper plates and two sides of the plate are plated with insulation medium layers.