A miniature fluid control device includes a gas inlet plate, a resonance plate and a piezoelectric actuator. The gas inlet plate includes at least one inlet, at least one convergence channel and a central cavity. A convergence chamber is defined by the central cavity. The resonance plate has a central aperture. The piezoelectric actuator includes a suspension plate, an outer frame and a piezoelectric ceramic plate. A gap is formed between the resonance plate and the piezoelectric actuator to define a first chamber. When the piezoelectric actuator is driven and after the gas is fed into the miniature fluid control device through the inlet of the gas inlet plate, the gas is sequentially converged to the central cavity through the convergence channel, transferred through the central aperture of the resonance plate, introduced into the first chamber, transferred downwardly through the piezoelectric actuator, and exited from the miniature fluid control device.

Miniature fluid control device

A micro-valve device is disclosed and comprises a gas gather board, a valve membrane and a outlet board, the gas gather board has at least one first penetrating hole, at least one second penetrating hole, at least one first pressure relief chamber and at least one first outlet chamber, the valve membrane has a valve hole, and the outlet board has at least one third penetrating hole, at least one fourth penetrating hole, at least one second pressure relief chamber and at least one second outlet chamber, when the gas goes into the first pressure relief chamber and the first outlet chamber form the first penetrating hole and the second penetrating hole, the valve membrane is opened downwardly, the gas then flows into the fourth penetrating hole to gather pressure. Inversely, when the gas flows into the second outlet chamber from the fourth penetrating hole, the valve membrane moves upwardly and contacts with the gas gather board, thereby close the valve hole of the valve membrane, and the gas of the second outlet chamber can flow into the second pressure relief chamber through a connecting channel, and then flow out the third penetrating hole to relief pressure.

Micro valve device

The invention discloses a quantitative particle material feeding system The quantitative particle material feeding system comprises a stock bin, a feeding mechanism, a supplementing mechanism, a metering device and a control device The discharging port of the stock bin is fixedly connected with the feeding port of the feeding mechanism The feeding mechanism comprises an upper material blocking plate, a lower material blocking plate, an adjustable material blocking plate, an inclined discharging slide way and a flow adjusting mechanism on the discharging slide way, wherein the upper material blocking plate, the lower material blocking plate and the adjustable material blocking plate are arranged in the feeding channel The flow adjusting mechanism comprises a material baffle and a motor drive mechanism of the material baffle, and the material baffle can be moved in a stepless mode A mini-type electromagnetic vibration feeder is adopted in the supplementing mechanism and used for accurate feeding, and the feeding port of the mini-type electromagnetic vibration feeder is formed in the discharging slide way of the feeding mechanism The metering device is a hopper-shaped metering scale, and a scale body of the hopper-shaped metering scale is provided with an independent landing support A PLC is adopted in the control device The quantitative particle material feeding system is suitable for moderate and small quantitative feeding of particle materials and particle materials not suitable for being extruded, and the working efficiency and the weighing precision are high High adaptability is achieved for the size and the ration of the material particles

Quantitative particle material feeding system

A review of the design, properties, applications, and prospects of Ni-based composite powders

The present invention inter-alia relates to an apparatus comprising a diaphragm valve, wherein a diaphragm of said diaphragm valve is made from a substantially rigid material, having at least partially an flexible cross-sectional shape.

Flexible Valve Geometry for the Use of Rigid Materials

The utility model relates to the technical field of metallurgical equipment, and particularly relates to a fluid conveying device comprising a bearing positioning sleeve, a bearing box, a bearing, a sealing box and sleeve tubes. The sleeve tubes comprise a sleeve tube I and a sleeve tube II, the sleeve tube I is nested at the inner side of the sleeve tube II, an inner hollow cavity of the sleeve tube I forms a fluid channel I, and a hollow cavity between the sleeve tube I and the sleeve tube II forms a fluid channel II. The fluid conveying device is provided with the two fluid channels, wherein one fluid channel changes the conveying by a fixed pipeline into the conveying by the rotating pipeline, and conveys a high pressure fluid to be reacted into a reaction kettle to improve the reaction speed and the carbonylation ratio; and the other fluid channel changes the conveying by the rotating pipeline into the conveying by the fixed pipeline to facilitate conveying of gas after reaction. The fluid conveying device can flexibly changes the conveying by the fixed pipeline or by the rotating pipeline, provides high pressure precession gas during feeding to improve the reaction speed and the crbonylation ratio, and reduces the pressure and vibration of gas during discharging, so that the conveying is smoother, and the service life of the device is longer.

Fluid conveying device

The utility model discloses a wet type electrostatic dust collector. According to the wet type electrostatic dust collector, high-voltage insulating tubes are covered on a corona electrode in a high-voltage insulating ceramic bottle and the outer part of a hoisting rod of a power source incoming line; and an insulating plate is arranged at the gap between the hoisting rod of the power source incoming line and an insulating box. Furthermore, other hoisting rods except the hoisting rod of the power source incoming line are made of high-strength insulators. With the adoption of the wet type electrostatic dust collector disclosed by the utility model, the phenomenon that excessive dust is gathered in the high-voltage insulating ceramic bottle in a production process and equipment faults are caused can be avoided and the fault rate of the wet type electrostatic dust collector is greatly reduced, the overhauling times are reduced, and the working efficiency of the dust collector is improved.

Wet type electrostatic dust collector

The invention discloses a method for preparing nickel-coated aluminum powder and relates to a method for preparing nickel-coated aluminum powder by decomposing nickel carbonyl. The method is characterized in that the preparation processes are as follows: introducing heated mixed gas of carbon monoxide and nickel carbonyl vapor into a fluidized bed reactor filled with aluminum powder to react, and coating nickel decompressed from nickel carbonyl on the aluminum powder to prepare the nickel-coated aluminum powder. According to the method for preparing the nickel-coated aluminum powder disclosed by the invention, aluminum powder particles form counter flow together with the mixed gas of carbon monoxide and nickel carbonyl vapor sprayed by a nozzle at the lower lateral part of the fluidized bed reactor inside the fluidized bed reactor; and in the counter flow process, the nickel carbonyl gas is pyrolyzed on the crystal nucleus surface of the aluminum powder to deposit metal nickel, so as to achieve coating of the coated crystal nucleus material. According to the method disclosed by the invention, the temperature requirement of the reaction process is low; the coated crystal nucleus material has touch performance; the device is simple; the speed is high; no chemical exists; no scrap material is generated; and the quality of a metal layer is high.

Method for preparing nickel-coated aluminum powder

The utility model discloses an elastic supporting device. The elastic supporting device comprises a supporting body (9), a base (11), a flange cover (4), a spring positioning sleeve (10), a spring (8), a pressing cover (7), a supporting rod (2) and multiple jackscrews (3 and 3'), wherein the supporting body is of a tubular structure; the base (11) is installed at the bottom of the supporting body (9); the flange cover (4) is installed at the top of the supporting body (9); the spring positioning sleeve (10) is arranged in the supporting body and is installed on the base (11); a part of the spring (8) is arranged on the spring positioning sleeve (10) in a sleeved mode; the pressing cover (7) presses the top of the spring (8), and a through hole with internal threads is formed in the center of the pressing cover (7); the supporting rod (2) penetrates through a center through hole of the flange cover (4) and is connected with the through hole in the pressing cover (7) through external threads; the jackscrews (3 and 3') are inserted into multiple jackscrew through holes in the flange cover (4). Supporting force of the elastic supporting device can dynamically change with deformation and can be used for supporting deformable articles.

Elastic supporting device

The utility model discloses a dust collection device for carbonyl iron powder. The dust collection device comprises an electromagnetic dust sucking device, a band type dust collection device and a suction device, wherein the electromagnetic dust sucking device is communicated with the suction device; the suction device is communicated with the band type dust collection device; two horseshoe-type electromagnets are arranged on the electromagnetic dust sucking device; and circuit breaking controllers are arranged on the electromagnets. When the dust collection device works, the electromagnets on the electromagnetic dust sucking device produce magnetic fields, and iron powder on the device is adsorbed onto the electromagnets; when the iron power reaches a certain amount, a short circuit short-circuits due to the iron powder, so that the electromagnets lose power, and the iron powder adsorbed to the electromagnets is pumped away by an air draft pipe; the iron power is subjected to dust collection through a bag, and then the iron powder subjected to dust collection is discharged from a discharge port; and at certain intervals, a back blowing device on a dust remover performs back blowing on the bag, so that the bag is prevented from being blocked. The dust collection device is simple in structure, can be used safely, and completely prevents potential safety hazards of a conventional duct removing device.

Zhang Hua

Papers

Fluid conveying device

Wet type electrostatic dust collector

Method for preparing nickel-coated aluminum powder

Elastic supporting device

Dust collection device for carbonyl iron powder