12results about How to "No dust" patented technology

The utility model discloses a dust fall type concrete raw material screening machine which comprises a barrel body, and a centrifugal screening mechanism is arranged in the barrel body. The centrifugal screening mechanism comprises a filtering cover, a collecting cover, a screening barrel, a limiting driving part and a discharging opening. The filtering cover is arranged at the inner top of the barrel body, the collecting cover is arranged in the barrel body, the screening barrel is arranged in the barrel body, the limiting driving part is arranged at the inner bottom of the barrel body, the discharging opening is formed in the inner bottom face of the barrel body, and the collecting cover and the filtering cover are each of an inverted conical structure. Meshes are formed in the filter cover; a discharge hole is formed in the bottom of the collecting cover; the utility model relates to the technical field of concrete processing, and compared with the prior art, dry concrete powder with qualified particles is thrown out of a screening barrel through centrifugal force and is discharged from a falling opening, the interior of the barrel body is nearly in a semi-closed state, and it is guaranteed that flying dust of the dry concrete powder cannot be generated.

The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing forming device and method with stirring friction assisted by rotary vibration, and the additive manufacturing forming device with stirring friction assisted by rotary vibration comprises a workbench assembly, a rotary vibration assembly arranged on one side of the workbench assembly, and a feeding system used for providing raw materials; the workbench assembly and the rotary vibration assembly can move relatively. According to the method, by means of the acoustic softening effect of in-situ coupling of rotary vibration with stirring friction assisted by rotary vibration, the thermal effect of stirring friction and the extrusion shearing effect, plastic rheology in the material forming process can be effectively promoted, the forming stress and temperature are reduced, the interlayer binding force is improved, and the mechanical property of the material is improved; and deposition and stacking of metal materials, high polymer materials, biological materials, composite materials and other raw materials in the forms of bars, strips, wires, powder, fluid and the like can be efficiently achieved, and multiple structures can be formed through a certain path in an additive forming mode.

The utility model relates to the field of mechanical equipment, in particular to a blocky solid raw material smashing and feeding integrated device which comprises a stock bin, a smashing machine, an auger and a first connecting pipe, a first feeding port is formed in the upper side of the smashing machine, a first discharging port is formed in the lower side of the smashing machine, and a second discharging port is formed in the stock bin. The second material outlet is opposite to the first material inlet; the auger is arranged below the pulverizer, the auger extends towards the pulverizer and is provided with a first connecting pipe, the first connecting pipe is in a hopper shape, the edge of the upper end of the first connecting pipe is attached to the lower side of the pulverizer, and the first connecting pipe is opposite to the first discharging port. The device is convenient to operate, high in flexibility, free of dust, free of pollution to an operation site, easy to overhaul and maintain and suitable for wide popularization.

The utility model relates to the technical field of fly ash collection, and discloses a fly ash collecting device which comprises an ash conveying scraper and an elevator which are obliquely arranged, a discharging hopper is arranged on one side of the top of the ash conveying scraper, a feeding hopper is arranged on one side, corresponding to the discharging hopper, of the bottom of the elevator, a discharging hopper is arranged on the right side of the top of the elevator, and the discharging hopper is arranged on the right side of the top of the elevator. A hose is flexibly connected between the discharging hopper and the feeding hopper, and a fly ash storage bin used for storing and collecting fly ash is further arranged on the side, correspondingly close to the discharging hopper, of the ash conveying scraper. According to the fly ash collecting device, fly ash can be scraped to the discharging hopper through the ash conveying scraper, the fly ash can fall into the feeding hopper from the discharging hopper along the hose under the action of gravity, then the fly ash entering from the feeding hopper can be lifted to a high position through the lifting machine, and the fly ash can be overturned and poured into the discharging hopper at the highest position; the dust collection device has the advantages of being sealed in the whole process, free of leakage and free of raised dust.

The utility model relates to an environmental protection type high pressure pulse line explosion type selective crushing device, include: pressure increasing device, energy storage device and discharge device, pressure increasing device is equipped with AC transformer, and energy storage device and discharge device are connected with AC transformer, discharge device includes control unit and electrode system that are connected in proper order in series, and control unit and electrode system all are connected with energy storage device, the utility model has the beneficial effect that: electrode top is hemispherical or conical, reduces the local concentration of electric field, prevents early breakdown, through electrode insulation design and sealing system, effectively prevent electrode from being eroded by vaporized metal wire, prolongs the service life of equipment, and simultaneously operating process is no dust, low noise, no harmful gas emission, accords with environmental protection requirement.

The utility model belongs to the technical field of ALC wallboard production and processing, and particularly relates to an ALC wallboard corner cutting device which comprises a machine table and a water jet cutter head which are sequentially arranged from bottom to top, a perforated plate is fixed to the middle of the upper surface of the machine table, two left corner protectors and two right corner protectors which are parallel to each other are arranged above the perforated plate, and the two left corner protectors and the two right corner protectors are each of a zigzag structure. The two left angle beads and the two right angle beads are distributed at intervals in the vertical direction, one left angle bead and one right angle bead are connected to the perforated plate, a plurality of first telescopic rods are fixed between the sides, away from the right angle beads, of the two left angle beads at intervals, and the first telescopic rods are parallel to one another; a plurality of second telescopic rods are fixed between the sides, away from the left corner protector, of the two right corner protectors at intervals and are parallel to one another. The four long edges of the ALC wallboard are sleeved with the four long edges of the ALC wallboard to be cushioned, the ALC wallboard cannot be rubbed when the ALC wallboard is moved to a machining station, and pits generated in the edges after corner cutting of the ALC wallboard can be reduced.

The invention provides a sludge drying weight reduction method and a low-temperature drying box, and the method comprises the following steps: S1, carrying out filter pressing on sludge, and enabling the sludge after filter pressing to enter a sludge hopper; s2, the sludge hopper is conveyed to a low-temperature drying box to be dried; and S3, bagging the sludge dried in the step S2 in a sludge bucket, and transporting the sludge outwards. The system has the beneficial effects that the newly added dehumidification low-temperature drying system does not influence the safe operation of the original sludge treatment system. The dehumidifying and drying system meets the demand for sludge drying, and a design safety margin is reserved. And the particles are dried at low temperature of 70 DEG C or below, the temperature of the particles is lower than 70 DEG C, and dust and explosion danger are avoided. And the discharging temperature is low (less than 50 DEG C), cooling is not needed, and direct storage can be realized.

This utility model relates to the field of fresh air filtration technology, and in particular to a fresh air filter, comprising a drawer valve and a dust collection box installed inside the fresh air duct of an air conditioning unit. The drawer valve includes a removable valve body, a first filter screen and a second filter screen fixed at openings on both sides of the valve body, a pneumatically controlled vibrating device installed on the top surface of the valve body, and an elastic diaphragm installed at the outlet at the lower end of the valve body. This utility model's fresh air filter installs a vibrating device and a dust collection box on the drawer valve. The vibrating device repeatedly vibrates the fresh air filter, automatically removing accumulated dust from the valve body, ensuring the filter remains dust-free for extended periods and does not affect the fresh air intake efficiency. Simultaneously, personnel only need to periodically observe the dust collection box and empty it when it is full, reducing manual labor.

The utility model discloses a liftable cup stand atmosphere lamp which comprises a cup stand base assembly, an atmosphere lamp assembly and a bearing base jacking assembly, and the cup stand base assembly comprises a cup stand body and a cup stand bearing base which is installed on the cup stand body in a liftable mode through a lifting matching mechanism. The top of the cup stand bearing seat is a cup bearing plate which can be at least partially pervious to light, the atmosphere lamp assembly is installed on the cup stand bearing seat and can lighten the pervious part of the cup bearing plate, and the bearing seat jacking assembly is installed on the cup stand bearing seat and enables the cup stand bearing seat to have the rising trend. By the adoption of the cup stand atmosphere lamp capable of being lifted, when no cup is placed, the top face of the cup bearing plate is flush with the top face of the surrounding interior trim, and the cup stand atmosphere lamp is attractive and free of dust accumulation; when a cup is placed on the cup bearing plate, a cup groove structure is automatically formed based on gravity, operation is easy, and use convenience is excellent; and moreover, the atmosphere lamp assembly can lighten the cup bearing plate, so that guidance for placing the cup is provided for the user, and the use convenience is improved.

Disclosed are a hybrid dialkylphosphinate salt, a method for preparing same, and use thereof. The hybrid dialkylphosphinate salt is selected from at least one of the compounds represented by Formula (I). The hybrid dialkylphosphinate salt of Formula (I) provided herein features a low required loading level, high flame retardant efficiency for various polymers, and good thermal stability. The present invention overcomes the disadvantage of low flame retardant efficiency of diethylphosphinate in polymers as well as low thermal stability and large dust of dipropylphosphinate. The hybrid dialkylphosphinate salt of Formula (I) can be widely applied to flame retardant polymers which require high-temperature processing.

The invention relates to the technical field of glass bead fracturing propping agents, in particular to a long-acting high-flow-guiding glass bead fracturing propping agent which comprises high-strength silicon crystal glass beads. As a proppant for oil well and gas well fracturing, the proppant provided by the invention can meet the requirements of bearing strength under various depth geological conditions and has stronger chemical stability, the acid and alkali resistance of a silicon crystal glass material is more stable and lasting, the surface smoothness of the glass beads is far higher than that of ceramsite, the hydrophobicity is obviously stronger, and the surfaces of the glass beads are not easy to be stained with oil. Gaps among the glass beads are not easy to block, the long-term flow conductivity is better, the production efficiency can be obviously improved, and the glass beads are more regular in roundness and shape, more balanced in stress in all directions, better in environmental pressure resistance and better in flowing property, so that the construction operation is facilitated.

The invention discloses a zinc oxide slag and iron oxide slag solid waste treatment method. The method specifically comprises the following steps that zinc oxide slag and iron oxide slag are conveyed to a ball mill through a hopper to be smashed; conveying the crushed materials to a winnowing machine by a ball mill for winnowing; the winnowed materials enter a magnetic separator for magnetic separation, and meanwhile, a dust remover is arranged for dust removal; iron powder separated by the magnetic separator enters a derusting machine for derusting, and a 300-bag high-temperature bag-type dust collector is arranged; the materials treated by the derusting machine pass through a vibrating screen, are divided by different screen mesh numbers according to requirements and are finally loaded into ton bags, and tailings fall to the ground after being stirred by double shafts and added with water. The invention has the advantages that: the treatment process has the advantages of no sewage, no dust and no pollution, can effectively treat solid waste, is reasonable in process, and has good popularization prospect and environment-friendly economic value.