31results about How to "Effectively absorb noise" patented technology

The invention discloses a shell device for local reactive power compensation. The shell device comprises a box body and a roof cover, wherein the box body and the roof cover form a hollow chamber for containing a local reactive power compensation device; the front surface and the rear surface of the box body are provided with box doors; a heat dissipating mechanism is arranged on one side surface of the box body, two wire entrance holes for containing connecting wires of the local reactive power compensation device are formed in the other side surface of the box body in an up-down manner, a pair of parallel first guide rails and a movable plate for placing the local reactive power compensation device are arranged at the lower ends of the left inner side surface and the right inner side surface of the box body, and a layer of flexible plastics for reducing the vibration of the local reactive power compensation device is arranged on the movable plate. The shell device has the good noise reduction, heat dissipation, dust-proofing and insulating effects, can be used in outdoor occasions, damp ground occasions, and occasions with strong vibration, can well protect the local reactive power compensation device in the device and enables the local reactive power compensation device to normally run in a good environment.

The invention relates to a prestress concrete noise barrier sound absorption inserting plate for a high speed railway. The prestress concrete noise barrier sound absorption inserting plate for the high speed railway comprises a prefabricated concrete unit inserting plate and a sound absorption panel which are rectangular structural members; the sound absorption panel is connected with the prefabricated concrete unit inserting plate through a bolt; left and right sides of the prefabricated concrete unit inserting plate are provided with thickened rib columns, and the top and the bottom of the prefabricated concrete unit inserting plate are respectively provided with thickened rib beams; a groove is formed on the thickened rib beam at the bottom of the prefabricated concrete unit inserting plate; and horizontal and vertical prestress reinforcing steel bars are arranged in the prefabricated concrete unit inserting plate. The prestress concrete noise barrier sound absorption inserting plate for the high speed railway can effectively resist long-term action of pulse air load and natural typhoon load of the high speed railway of which the highest speed is 380 to 400 kilometers per hour, has good fatigue resistance performance, obvious lasting quality and remarkable noise-reducing effect; and the cost for manufacturing the prestress concrete noise barrier sound absorption inserting plate is low, and the prestress concrete noise barrier sound absorption inserting plate is convenient to install and exchange.

The invention provides an industrial machinery dust low-noise collector. The industrial machinery dust low-noise collector comprises a machine cabinet, and upper covering door and a middle covering door. The upper covering door hinged to the machine cabinet is mounted on one side of the machine cabinet. A sealed type cuboid silencing cabin is formed by the upper covering door and the machine cabinet when the upper covering door is closed. Grooves are formed in the six wall faces of the silencing cabin. Sound absorbing cotton is pasted to the bottoms of the grooves. Silencing plates are fixedlymounted at tops of the grooves. The middle covering door hinged to the machine cabinet is mounted below the upper covering door. A vibration cabin is formed by the middle covering door and the machine cabinet when the middle covering door is closed. A dust storing cabin is arranged below the vibration cabin. Through improvement to an industrial machinery dust low-noise collector, the industrial machinery dust low-noise collector has the advantages that the structure is compact, the occupied area is small, the working noise is little, operation is stable and reliable, the air circulation effect in the machine cabinet is excellent, and the dust can be highly absorbed, and therefore the problems and defects in the background technology can be effectively solved.

The invention discloses a two-stage rotary blade type vacuum pump which comprises a pump body.The pump body is internally provided with a first pump cavity and a second pump cavity.The pump body is provided with an air inlet pipe communicated with the first pump cavity.A first exhaust port of the first pump cavity is communicated with the second pump cavity through a serial connection channel, a second exhaust port is formed in the second pump cavity, the first pump cavity and the second pump cavity are internally provided with rotary blades, rotary blade springs and rotors, the rotary blades are disposed on the rotors, the outer rings of the rotors are tangential to the inner surfaces of the pump cavities, the rotary blade springs are disposed in the rotary blades, and the rotary blades are attached to the inner walls of the pump cavities through the rotary blade springs.According to the two-stage rotary blade type vacuum pump, two-stage rotary blade type design is adopted in the pump body, so that the ultimate pressure intensity of the vacuum pump is increased, a high vacuum degree can be obtained, the use range is wider, and practicality is good.

Disclosed is a shock absorption support component for a ground sound insulation floor. The shock absorption support component for the ground sound insulation floor is characterized in that a foot pad is arranged on a portion of the shock absorption support component for the ground sound insulation floor, contacted with the ground, a rubber buffer piece is arranged on the foot pad, a flange A is arranged in the rubber buffer piece, the lower portion of a metal support pillar is connected with the flange A in threaded mode, the upper portion of the metal support pillar is connected with a flange B in threaded mode, and the flange B is fixedly connected into a groove hole in the floor above the shock absorption support component. Due to the fact that the metal support pillar is connected with the flanges, shakes of the floor above the shock absorption support component are transmitted to the rubber buffer piece below the floor, and then transmitted to a rubber foot pad sucking disc at the bottom of the rubber buffer piece after buffered by the rubber buffer piece and a balance weight object so as to be further buffered. The shock absorption support component for the ground sound insulation floor is simple in used material, stable in structure, difficult to craze, convenient to replace and maintain, and suitable for sport areas in facilities of high floor gymnastics rooms, fitness centers and the like in places such as schools, where attendance is large and activities of people are strenuous, prevents water and resists corrosion, resists dry ironing, and resists static electricity.

The invention relates to an air injection device for a low-noise classroom. The air injection device for the low-noise classroom comprises a box body and an air pipe connector. A plurality of adjustable ball-shaped nozzles are installed on the side wall of the box body, the air pipe connector is installed at one end of the air pipe connector, and a silencing material layer is paved on the inner side wall of the box body. The air injection device for the low-noise classroom is easily combined combine with a building and can inject purified fresh air out, supplied air jets can reach all positions in the classroom after spreading, and noise is lowered.

The invention discloses an adjustable spray device for raising dust control of building construction. The adjustable spray device comprises a case, wherein a storage groove opening is formed in the top end of the case; a pneumatic cylinder is mounted in the position, corresponding to the storage groove opening, at the bottom end in the case; a pneumatic cylinder piston rod is glidingly mounted atthe top end of the pneumatic cylinder; a worktable is welded at the top end of the pneumatic cylinder piston rod. The adjustable spray device is scientific and reasonable in structure and safe and convenient to use; by arranging the pneumatic cylinder, the pneumatic cylinder piston rod and the worktable, the worktable is wholly lifted upwards by the pneumatic cylinder and the pneumatic cylinder piston rod, the position of an air tube is elevated, and the problem that spray dust settling range is limited because the start position of a parabola is difficult to change due to the facts that spraydrops according to a parabolic path after being sprayed by the conventional dust settling sprayer under the effect of gravity and height of the air tube is difficult to adjust is solved; by arranginga hollow column, a reserved hole and a wire through hole, an electric appliance structure in the air tube is conveniently connected with a control electric appliance in the case, and mounting and penetration of a water pipe are facilitated.

The invention relates to the technical field of drive shafts of vehicles, and provides a sheath used for a driving shaft, the driving shaft and a vehicle. The sheath used for the driving shaft includes a sheath wall, the whole sheath wall extends in the axial direction, the sheath wall is provided with a spiral spring extending in the axial direction so as to effectively absorb impact and abnormal sound noise generated by the driving shaft due to radial clearances and axial clearances in the torque transmission and movement processes, and therefore the performance of the vehicle can be improved.

The invention discloses waste paper pulp raw material mixing and stirring equipment. The equipment includes a stirring tank shell, a stirring roller is arranged in the stirring tank shell, a water inlet hopper is fixedly arranged at a water inlet in one side of the stirring tank shell, a feeding hopper is fixedly arranged at a feeding hole in one side of the top of the stirring tank shell, an electric hydraulic cylinder is fixedly arranged on a bottom plate in a placement chamber, and the output end of the electric hydraulic cylinder is fixedly connected with a driving motor. The invention discloses the waste paper pulp raw material mixing and stirring equipment, a connecting plate and a cleaning brush are arranged, and the driving motor and the electric hydraulic cylinder are arranged todrive the equipment to rotate up and down, residues remained on the inner wall of the stirring tank shell can be effectively scraped, thus being convenient and rapid, a specified cleaning solution canbe guided into the stirring tank by arranging a water storage tank and a flow guide pipe, so that sediments left in the tank are effectively dissolved, noise generated during stirring can be effectively absorbed by arranging a sound absorption plate, and the working environment of a workshop is prevented from being affected.

The invention relates to a vehicle by using a blowing type heat dissipation device. The vehicle comprises a power unit and a heat dissipation device used for dissipating heat of the power unit. The vehicle is further provided with an air inlet cabin door allowing the heat dissipation device to suck air from the outside. The heat dissipation device comprises a radiator and an electric fan; a fan cover is fixedly mounted on one side of the radiator; one port of the fan cover corresponds to the radiator; the electric fan is installed at the other end of the fan cover and is close to the air inletcabin door, a sealing cover is further fixedly arranged on the vehicle relative to the fan cover, one port of the sealing cover is directly or indirectly communicated with a door opening of the air inlet cabin door, and the other end of the sealing cover is in sealing fit with the electric fan or the fan cover so that a sealed air passing channel can be formed between the air inlet cabin door andthe radiator. The vehicle using the air blowing type heat dissipation device can be used for solving the problems that when a heat dissipation device in an existing vehicle works, hot air blown out of the heat dissipation device flows back into cold air flow generated by the electric fan, the heat dissipation effect is affected, and electronic elements of the electric fan are damaged.

The invention discloses an air compressor with the noise reduction function. The air compressor comprises a noise reduction bottom plate, a plurality of noise reduction side plates, a noise reduction top plate and an air compressor body, wherein the air compressor body is fixedly arranged on the noise reduction bottom plate, the multiple noise reduction side plates are arranged on the outer side of the air compressor body in a surrounding mode, the noise reduction top plate is fixedly arranged on the sides, away from the noise reduction bottom plate, of the noise reduction side plates, an air inlet pipe is connected to one side of the air compressor body, an air inlet silencer is installed at the upper end of the air inlet pipe, an air outlet pipe is connected to the other side of the air compressor body, an air outlet silencer is installed on the air outlet pipe, the upper end of the air inlet pipe and the upper end of the air outlet pipe both penetrate through the noise reduction top plate and extend out of the noise reduction top plate, and the two ends of the air outlet silencer are connected with the air outlet pipe through 90-degree connecting bent pipes respectively. The noise generated in the operation process of the air compressor is eliminated.

The invention discloses a novel stainless steel miniature multistage booster pump. The novel stainless steel miniature multistage booster pump comprises a motor, a pump shaft and a pump body, whereinthe lower end of the motor is movably provided with a machine frame, the lower end of the machine frame is fixedly provided with the pump body, the two sides of the pump shaft are provided with impellers, sealing materials are arranged on one sides of the impellers, a water retaining ring is arranged at the lower end of the machine frame, a coating is fixedly arranged on the outer surface of the machine frame, rubber is arranged on the outer surface of a deflation valve, and sound absorption cotton is fixedly arranged inside the pump body. The novel stainless steel miniature multistage boosterpump is provided with the rubber, the coating and the sound absorption cotton so that people can conveniently find the booster pump at night; the layer of elastic rubber is arranged outside the deflation valve so that the softness can be increased, and the pain of hands of people can be relieved when the deflation valve is rotated by people; and the sound absorption cotton is arranged inside thepump body so that noise can be effectively absorbed, and then the pump can be applicable to different working conditions and can have a better application prospect.

The invention belongs to the technical field of motor shells, and particularly relates to a cooling and noise-reducing case. Aiming at overcoming the defects that an existing machine shell is formed by combining an outer shell body and an inner shell body, a motor is very inconvenient to install in the inner shell body, the motor can only be installed from an opening, and time and labor are wasted, the invention proposes the following scheme that the case comprises an outer shell and an inner shell; one side and the top side of the outer shell and one side and the top side of the inner shell are open; the inner shell is installed on the inner wall of the bottom side of the outer shell in a sliding mode, an outer cover plate is placed on the top side of the outer shell, two connecting rodsare fixedly installed on the bottom side of the outer cover plate, and the same inner cover plate is fixedly installed at the bottom ends of the two connecting rods. The case is simple in structure, the multiple heat conduction plates and the sound absorption cotton are arranged to enable the motor shell to be good in cooling, heat dissipation, noise reduction and noise reduction effects, after the outer cover plate is lifted upwards, the inner shell with the opening in the top side is pushed out of the outer shell, a motor does not need to be operated in the narrow outer shell during installation, and installation is quite convenient.

The invention discloses an efficient automobile accessory grinding device. The efficient automobile accessory grinding device comprises a shell, and a sound insulation layer is arranged on the surfaceof the shell; two first fixing columns are arranged on the top of the shell, the sides, close to each other, of the first fixing columns are each provided with a sliding groove, a sliding column is slidably connected to the inner wall of each sliding groove, an electric hydraulic rod is connected to each sliding column, and a clamping device is arranged at the tail end of each electric hydraulicrod; a groove is formed between the two first fixing columns, a waste containing tank is connected to the inner wall of the groove, and the groove is located on the top of the shell; a telescopic motor is arranged on the inner wall of the bottom of the shell; a sliding plate is slidably connected with the inner wall of the shell, a sliding rod is arranged at the upper end of the sliding plate, a driving block is arranged on the sliding rod, a driving motor is arranged on the top of the driving block, a grinding assembly is connected to an output shaft of the driving motor and located in the waste containing tank, a cotton cloth is arranged in the waste containing tank, and a water spray head is arranged above the cotton cloth; and an anti-vibration pad is arranged at the bottom of the shell. The efficient automobile accessory grinding device is simple in structure, low in cost, economical and practical.

The invention relates to a BIM-based glass fiber composite air duct product production management system. The system is characterized in that an air duct structure formed by cutting, bonding, splicingand assembling glass fiber composite materials can be cleaned by using a common air duct cleaning machine, and air can be kept clean; according to a production method of a glass fiber composite air duct, an air duct sketch is made through the Autodesk Revit, a single straight air duct and a single special-shaped air duct are manufactured on the basis of the sketch, prefabricated manufacturing information is imported into an Autodesk Fabrication control system, and the production process of the glass fiber composite air duct is controlled through the Autodesk Fabrication. The system has the beneficial effects that the air duct production process is automatic and intelligent; firstly, the sketch meeting the requirement is made according to the field requirement, then sketch data are imported into a BIM system, and the manufacturing process of precise discharging, bending and fixing of the air duct is achieved through data control over production line machinery; and in addition, the manufacturing process of the air duct can be simulated in advance, the manufacturing process is optimized to the maximum extent, and the possibility of misoperation is reduced.

The invention discloses a noise reduction earplug. The earplug comprises a shell, and the shell comprises a substrate and a graphene coating the outer side of the substrate; and the shell is filled with a sound-absorbing material. According to the noise reduction earplug, the defects that the traditional noise reduction earplug is prone to aging and deformation are overcome to a certain degree, the noise reduction performance of the earplug can be remarkably improved, and possibility is provided for application of a graphene thin film material in daily life.