33results about How to "Reduce noise hazards" patented technology

A device aiding the flight management of an aircraft during a phase of landing on an airport includes means for automatically determining an adaptive aiming point that is shifted along the runway in the downstream direction and which can be used by different usual landing aid means of the aircraft.

The invention discloses an inverse armature brazing machine with double feeding of brazing wire belts and a welding technology thereof. The inverse armature brazing machine comprises an armature preparation plate, a machine base, a loading supporting base, a servo clamping and indexing mechanism, an armature loading supporting roller mechanism, an armature supporting rectification mechanism, a wire pressing and welding mechanism, a first brazing wire belt feeding mechanism, a second brazing wire belt feeding mechanism, a brazing filler metal plate and a smoke absorption mechanism. According to the machine, the brazing wire belts can be fed to the welding areas between outer-layer wires and inner-layer wires and the welding areas between the inner-layer wires and a commutator segment at the same time so as to be located in the middle of a conducting loop in welding and become the largest heat emission spot, and therefore the problem that a commutator emits heat excessively and then becomes expanded and deformed in the traditional lateral brazing wire belt feeding and welding process is solved, and the problems that temperature rise is excessive and the service life is short due to the small sectional area of arc welding connection and welding spot connection caused by single feeding of the brazing wire belts are solved; two wire processes of argon arc welding are eliminated in the armature welding process, the welding efficiency is high, welding is more reliable, less brazing filler metal is used, and the welding benefit is better.

The invention discloses a method for coating wire with ice-snow prevention layers. The method comprises the following steps of spraying waterproof paint on the surface of the wires to form a coating layer, regulating the coating layer on the surface of the wire to enable the coating layer to reach the set thickness, and drying the coating layer of the wire at a temperature between 50 and 70 DEG C. The invention also discloses a coating device of the method. Because the invention adopts pressure coating, gaps among aluminum strands on the outermost layer of the wire can be filled up; through the adjustment of a diameter-setting mold, the coating layer is not only uniform in the surface, but also controllable in thickness, so the whole coated wire is smooth and compact in the surface, and snow or frozen rain is not easy to solidify on the surface of the wire; and a steel wire on a center layer of the wire is not easy to pollute by rainwater or corrosive atmosphere. Therefore, the wire not only has the characteristics of preventing ice and snow and resisting corrosion, but also has the advantages of reducing the vibrating and waving harm of breeze, lowering the level of corona and radio interference and enabling power transmission lines to be lower in noise hazard and friendlier to environment.

The invention discloses an energy-saving and environment-friendly screening device for constructional engineering construction building material gravel. An upper rail and a lower rail with the same structure are arranged in the machine body; a first material passing screen is borne on the upper rail and the lower rail, and a second material passing screen is borne on the two lower rails. An inclined panel with a material leaking hole is arranged in the middle of the first material passing sieve; an outflow square hole is formed in the right side of the first material passing sieve; sliding plates inclining towards the inner side of the middle part are arranged on the left and right sides of the bottom of the first material passing screen; a driving support is installed on the left side ofthe first material passing screen, a linkage rod and a driving motor are arranged in the driving chamber, the linkage rod is connected with a driving disc through a power rod, the power rod is hingedto the midpoint of the linkage rod and the outer circle side of the driving disc, and a second driving support connecting plate penetrates through the left side wall of the machine body and then is connected with the linkage rod. By arranging the first material passing screen, the second material passing screen and the driving chamber, gravel can be screened conveniently, and the beneficial effectof being environmentally friendly is achieved. The screening device is suitable for being widely applied to gravel screening.

The invention discloses a BIM-based machine room arrangement and construction guidance method, relates to the technical field of building construction, aims to solve the technical problem that inan existing machine room design mode, the installation and connection conditions of various devices can be known only after construction is completed, real-time model guidance does not exist, so that repeated construction is easily caused, and material waste is cause;. According to the technical scheme, the method is characterized by comprising the following steps that S100, surveying and mapping are conducted on site, and a surveying and mapping database is established according to data obtained through surveying and mapping; s200, BIM modeling is performed according to the data obtained by surveying and mapping, and the position of the equipment is planned in advance in the modeling process; s300, path planning is conducted on the line pipes, the water pipes and the air pipes used in the machine room, and adjustment is conducted in real time according to planning; s400, according to the basis provided by the model, modular production is conducted on the line pipes, the water pipes and theair pipes of the machine room; and S500, modular assembling and splicing are conducted on the site of the machine room. The effects of reducing material waste in the construction process and effectively saving resources are achieved.

A small oil squeezing device comprises a rack (1), wherein a feed barrel (2) is arranged on the rack; a dense screen is arranged at the middle section of the feed barrel (2); a squeezing device (3) is arranged at the bottom end of the feed barrel (2); a motor (4) is arranged at the middle section of the squeezing device (3); an oil outlet pipeline (5) is arranged on the squeezing device (3); an oil collecting basket (6) is arranged at the tail end of the oil outlet pipeline; during usage, rapeseeds are evenly poured into the feed barrel (2), the screen filters out redundant impurities, the motor (4) runs to perform preheating from the temperature of the squeezing device (3) for rotating and inward pressing, and oil is discharged via the oil outlet pipeline (5) and flows to the oil collecting basket (6); a power plug (7) is arranged on the rack (1), and low-voltage and direct-current type power supply is adopted for working; a control panel (8) is arranged for setting of the squeezing time and rate; a user can squeeze rapeseed oil at home directly and conveniently, carrying is not required, time and labor are saved during squeezing, the noise hazard is reduced, and the oil squeezing efficiency can be effectively improved.

The invention discloses a tumbler for meat product processing, which comprises a tumbler mechanism, a drive mechanism and a PLC electric control unit. A device and a transmission rod, a transmission rod is installed inside the tumbling chamber, tumbling paddles are installed at the upper and lower ends of the transmission rod, a vacuum generator is installed above the inside of the tumbling chamber, and the upper end of the vacuum generator is installed There is an air extraction pipe, an organic cover is installed on the upper end of the tumbling chamber, the driving mechanism includes a motor, a rotating shaft, a gear and a transmission belt, a rotating shaft is installed at one end of the motor, a gear is installed above the rotating shaft, and the PLC A frequency converter is installed at one end of the electric control unit, and a silencer is installed at the other end of the PLC electric control unit, and a material box is installed at one end of the silencer. The invention adopts an intelligent operating system, improves the degree of automation, and makes the effect of the tumbling product uniform.

The invention provides a humidifying and silencing ventilation pipeline device. A plurality of supporting racks are included and arranged in a ventilation pipeline. The section of each supporting rackis in a symmetric streamline shape, the head-tail direction of each supporting rack is kept to be consistent with the gas flowing direction, and gas jet flow flows towards the tails of the supportingracks from the heads of the supporting racks. An inner pipeline is arranged on the inner side of the front portion of each supporting rack, and a plurality of water spraying holes are formed in the wall faces of the two sides of the front portion of each supporting rack, wherein the inner pipeline comprises a driver, a transmission rod, a supporting pipe, an inner water conveying pipe and a rotary water spraying pipe, water can be sprayed from the positions of the water spraying holes, and the water spraying direction can be adjusted. Drying layers are arranged on the two sides of the rear portion of each supporting rack, water discharging grooves are formed in the lower positions of the drying layers, and the drying layers can absorb water of the surrounding environment and discharge water into the water discharging grooves. The water discharging grooves communicate with a water discharging pipe outside the ventilation pipeline. According to the humidifying and silencing ventilationpipeline device, on the basis of optimizing of the pipeline inner gas flow field, the humidifying noise lowering technology is utilized, spreading of noise in the ventilation pipeline is restrained, and background noise is lowered.

The invention relates to the technical field of solid wood boards, and discloses a cutting device for the solid wood board. The cutting device comprises a working frame, wherein the working frame is provided with a long roller and a short roller; a clamping rod is arranged on the side face of the working frame, and a spring is arranged on the clamping rod in a sleeving mode; the clamping rod is in threaded connection with a large nut, and the clamping rod is connected with a clamping plate; the clamping plate is provided with a rolling wheel, so that the solid wood board is clamped during going forward to prevent swinging from side to side when being cut; the bottom of the inner wall of the working frame is fixedly connected with the top of a conical funnel, the bottom of the conical funnel is fixedly connected with the top of a wood chip box, and the right side of the wood chip box is fixedly connected with a chip removal opening; the right side of the inner wall of the working frame is fixedly connected with the left side of a fixed supporting plate, and the top of the fixed supporting plate is fixedly connected with the bottom of a motor; and the output end of the motor is fixedly connected with a cutting knife. Sound insulation cotton is arranged on the inner wall of a top cover, and cotton woven cloth is arranged on the back face of the top cover, so that wood chip splashing can be reduced, and too large noise can be avoided. Therefore, noise harm is reduced, and the cleanliness of the operation surrounding environment is improved.

The invention discloses a hot galvanizing noise reduction and edge thickness control baffle, device and method, and relates to the field of noise reduction baffles. The hot galvanizing noise reductionand edge thickness control baffle comprises a baffle, a mounting block on the upper portion of the baffle and a noise reduction plate, wherein the hot galvanizing noise reduction and edge thickness control baffle is divided into a working area, a transition area and a noise reduction area, the lower end of one side, far away from the transition area, of the working area is arc-shaped, the transition area and the noise reduction area are provided with airflow guide grooves, and the noise reduction area is also provided with the noise reduction plate. The hot galvanizing noise reduction and edge thickness control device comprises the hot galvanizing noise reduction and edge thickness control baffle, strip steel and an air knife plate, when the strip steel is treated by the hot galvanizing noise reduction and edge thickness control device, the noise pollution is reduced due to the special structure of the baffle and the matched use method of the device, and the edge thickness control ofthe treated strip steel is better.

The invention relates to the technical field of motor damping, in particular to a motor mounting frame, a fan assembly and an air purifier. The motor mounting frame comprises a shaft sleeve and a bearing. A through hole is formed in the shaft sleeve. The bearing is directly or indirectly in assembly connection with the shaft sleeve. A positioning shaft hole is formed in the bearing and is parallelto the axis direction of the through hole. A shaft sleeve convex edge is arranged along at least part of an outer edge of the shaft sleeve. Fixed positions are formed on the shaft sleeve convex edges. The motor mounting frame provided by the invention is provided with the shaft sleeve convex edge along at least part of the outer edge of the shaft sleeve, and the fixed positions are formed on theshaft sleeve convex edge, so that the motor mounting frame can be fixed through the fixed positions. A motor shaft is convenient to rotate in the motor mounting frame according to the specific axis without relative shaking when the motor mounting frame is fixed, and the smooth and steady operation of a motor is ensured.

Provided is a noncontact intelligent multi-sound electronic horn. At present, automobile electronic horns are single in tones, make the same sound (being consistent in the sound level) under any circumferences, and make relatively larger noise when the using sites are different. The noncontact intelligent multi-sound electronic horn is formed by a circuit board assembly and a mechanical assembly,wherein the circuit board assembly is formed by a communication module (1), a master control circuit module (2), a drive circuit module (3), a switch module (4) and a closed loop reactive circuit (5);the circuit board assembly is connected with a coil assembly in the mechanical assembly in a welding mode to form a horn system (6), thus implementing a noncontact intelligent multi-sound electronichorn; and the mechanical assembly is formed by a membrane assembly (7), the coil assembly (8), a housing assembly (9), a plastic shell assembly (10) and auxiliary members. The invention is applied toa noncontact intelligent multi-sound electronic horn.

The invention relates to a continuous travel track (5) to be supported by a bridge structure (1) comprising at least two bridge segments (4) and a bearing framework for supporting said segments (4), the travel track (5) comprising: continuous flagstone (50) extending from one end of the bridge (1) to the other; an anti-friction layer (55) arranged beneath the continuous flagstone (50); and a crossing plate (53) arranged beneath the continuous flagstone (50). Said travel track comprising at least one anti-rising device (54).

The invention relates to a cleaning device for the shaving head of an electric shaver. The cleaning device (1) comprises a holding part (2) into which the shaving head can be inserted. A pump (5) delivers a cleaning liquid (4) from a reservoir (3) to the holding part (2). A controllable drainage (9) from the lower area of the holding part (2) to the reservoir (3) ensures that the cleaning fluid (4) only flows back into the reservoir (3) when necessary. This results in the cleaning liquid (4) remaining in contact longer with the shaving head to be cleaned without the pump (5) having to continuously operate.