6results about How to "Guaranteed centrality" patented technology

The invention relates to the technical field of advertising boards, in particular to a foldable dynamic display LED intelligent advertising board which comprises a lamp board base, an advertising board set, a power system and a hinge assembly, the advertising board set comprises a first lamp board, a second lamp board, a third lamp board and a fourth lamp board, the first lamp board is installed on the lamp board base, the power system is installed on the first lamp board, and the hinge assembly is installed on the second lamp board. The back of the first lamp board is connected with the back of the second lamp board through a hinge assembly, the back of the second lamp board is connected with the back of the third lamp board through a hinge, and the back of the third lamp board is connected with the back of the fourth lamp board through a hinge assembly. According to the multi-face folding LED advertising board, the advertising board sets are connected through the hinge assemblies, a worker rotates the lamp board to enable the hinge assemblies to move, multi-face folding of the advertising board is completed, disassembly, assembly, folding and transportation of the LED advertising board are facilitated, the LED lamp bead faces can be effectively protected after folding is completed, and the LED lamp bead faces are prevented from being collided and damaged in the stacking and transportation process of the LED advertising board.

The utility model discloses an automatic balling production line bin top dust remover, which comprises a dust removal cylinder, a dust removal cover head, a reverse air impact guide pipe, a pulse electromagnetic valve, a high-pressure air storage tank and a filter element, the filter element is arranged in the dust removal cylinder, and air outlet holes are distributed in the surface of the reverse air impact guide pipe part in the middle of the interior of the filter element. And an outer port of the anti-air-flushing guide pipe is connected with a port on one side of the pulse electromagnetic valve. The back flushing device has the beneficial effects that the part, with the air outlet hole structure, of the back flushing guide pipe is arranged in the filter element, and high-pressure air in the high-pressure air storage tank is output and discharged from the air outlet hole structure in combination with the opened pulse electromagnetic valve, so that back flushing can be carried out by high-pressure air flow from the inside of the filter element to the outside; meanwhile, the guide-in opening formed in the bottom of the dust removal barrel faces downwards, so that the falling centrality of impurities such as dust is guaranteed, and the cleaning period is prolonged.

This invention discloses a vortex nozzle based on the boundary layer effect. It includes an inlet structure, a vortex assembly, and an outlet structure. The vortex assembly consists of at least two coaxial vortexes stacked together, each with a central hole that forms an axial jet channel. The wavy surfaces of adjacent vortexes form a curved channel that converges towards the central hole, with the curved surfaces forming troughs at the edge of the central hole. The axial spacing h is less than the diameter D of the central hole. Water enters the curved channel tangentially from the outer edge, smoothly changes direction due to the boundary layer effect, and forms a vortex at the central hole, resulting in an axial jet that achieves a near 90° turn. When used for rotary drive, at least two circumferentially distributed nozzles spray in opposite directions along the tangent, forming a force couple. This invention features low energy loss, concentrated jet, and strong reaction force.

The utility model relates to elevator technical field discloses a kind of ventilation device of lift, including elevator car and fan fixedly installed at the top of elevator car, the inner wall of the elevator car is fixedly connected with flow guide box, the inside of the flow guide box is transversely provided with air passage, the inside of the flow guide box is longitudinally provided with the air outlet groove being communicated with air passage. The utility model breaks through the air flow limitation of traditional ventilation fan by air passage, air outlet groove in flow guide box, cooperate top wall air outlet hole one with side wall air outlet hole two, adjustment assembly drives silica gel sealing block sliding, can realize top and lateral air outlet switching, enlarge ventilation range, improve efficiency and cooling effect, air outlet hole two is downward to avoid direct blowing passenger, improve comfort, silica gel sealing block is isosceles trapezoid, with fixed frame air passage matching, avoid air leakage, adjustment assembly is fixed sliding plate by magnet magnetic attraction, stabilize silica gel sealing block and be convenient for operation, satisfy different ventilation needs.

The utility model relates to a wind scooper which comprises a fan cover and a wind shield, one end of the fan cover is connected with one end of the wind shield, and the wind shield extends in the direction far away from the other end of the fan cover in the axial direction of the fan cover. By arranging the fan cover installed at the rear end of the motor and the wind shield installed above the motor body, a complete air channel from the rear end to the front end of the motor can be formed, and it is guaranteed that after air is blown out by the cooling fan at the rear end of the motor, air flow can be guided to the positions of a front bearing and an end cover of the motor; the problem that an existing fan cover cannot guide air in the area is solved, and effective heat dissipation of the front bearing and the end cover of the motor is achieved. Meanwhile, when the motor is used, the wind shield covers the upper end of the motor body and can be used for shielding falling objects such as dust and flying catkins, heat dissipation is prevented from being hindered due to the fact that the dust and the flying catkins form a heat insulation layer on cooling fins of the motor, and the heat dissipation efficiency is further improved due to the arrangement of the wind shield.

The utility model belongs to the catalytic production technical field, concretely relates to a kind of quick cooling device for catalyst production preparation, including base, the top of the base both sides position is equipped with support frame, cooling tank is fixedly installed between the upper end position of support frame, the inner side wall of cooling tank is fixedly installed with cooling material pipe, the outer side wall intermediate position of cooling material pipe is fixedly set with condensing coil, the outer side wall of condensing coil is fixedly set with heat insulation sleeve, cooling material pipe is tightly set with condensing coil outside, the contact area of surrounding type layout with cooling material pipe is increased, can more efficiently absorb the heat of catalyst in pipe, accelerate cooling speed;Heat insulation sleeve outside condensing coil can reduce heat to outside dissipation, ensure that cooling energy concentrated effect is applied to catalyst, improve cooling efficiency.