60results about How to "Play a sound-absorbing effect" patented technology

The invention discloses an environment-friendly oil immersed transformer. The environment-friendly oil immersed transformer comprises an oil tank outer shell, an oil tank inner shell, an iron core and a winding located at the center of the oil tank inner shell, an oil purification device located at the two sides of the iron core and the winding and forms a cavity together with the sidewall of the oil tank inner shell, and a noise reduction device located between the oil tank inner shell and the oil tank outer shell. The noise reduction device comprises a noise reduction interlayer and a cooling interlayer; the noise reduction interlayer which adopts a porous glass wool board has the closest distance to a noise resource and can absorb noise efficiently; as the noise reduction interlayer is installed in the oil tank, diffusion of fiber fines can be avoided, and environment pollution can be reduced; as the cooling interlayer is located between the oil purification device and the noise reduction interlayer, the temperature of transformer oil can be reduced efficiently; as the oil purification device is an enforced purification device arranged in the oil tank, the oil purification device comprises a first purifier used for filtering away nonmetal impurities and a second purifier used for adsorbing metal impurities and has no air exchange with the exterior, the degree of purity of the transformer oil can be increased; and as the noise reduction device and the oil purification device are in mutual coordination, the effect of giving consideration to noise reduction, oil purification and cooling is realized, and good environment-friendly and energy-saving performances are obtained.

The present invention relates to a ceiling and more particularly to a sound absorbing ceiling. A sound absorbing ceiling comprises a boom and a sound absorbing component, wherein the sound absorbing component comprises a steel structure frame and a polyester fiber sound absorbing panel connected to the steel structure frame; the polyester fiber sound absorbing panel is formed by splicing a plurality of sound absorbing panel blocks mounted on the steel structure frame. The plurality of sound absorbing panel blocks are installed on the steel structure frame, and then are spliced to form the polyester fiber sound absorbing panel, and the polyester fiber sound absorbing panel is used to absorb sound. Since the steel structure frame is used as a support and the sound absorbing panel blocks havesmall sizes, the sound absorbing panel blocks are not subjected to a large force due to its own weight when mounted on the steel structure frame. Therefore, the sound absorbing ceiling has good overall structural strength.

The invention discloses a sound attenuated enclosure for a generator set, and relates to the technical field of the generator set. The sound attenuated enclosure structurally comprises a base, an enclosure body wall and an upper cover, wherein the enclosure body wall is arranged above the base, and the upper cover is movably arranged above the enclosure body wall and is used for sealing the enclosure body wall; the enclosure body wall comprises an outer plastic steel layer, a middle sound-absorption foaming layer and an inner damping layer, wherein the edges of the two side enclosure body walls are provided with two push rods which are convenient to push the generator set, the edge of a certain side of the enclosure body wall is provided with a cooling and ventilating pipe which is of an arc shape, and a round hole faces the bottom surface; the bottom of the base is provided with a pulley, the upper cover is provided with an oil inlet on which a seal cover is arranged, and the seal cover is connected with the upper cover through a hinge; a rubber gasket is arranged on an oil inlet, and the push rod is provided with a rubber sleeve capable of increasing the force of friction. The sound attenuated enclosure provided by the invention is simple in structure, and the working noise of the generator set can be greatly reduced.

The invention relates to the field of computer peripheral equipment, and discloses a computer case. The computer case further comprises a shell, the rear side face of the shell is open, the front sideface of the shell is provided with a window, an upper cover plate of the shell is formed by hinging at least two shielding plates end to end in sequence, and the front end of the upper cover plate ishinged to the shell; a hinge end of one shielding plate is provided with an opening, and a hinge end of the other shielding plate hinged to the shielding plate is provided with a clamping block clamped in the opening; the inner side face of a hinge end of the upper cover plate is provided with an elastic box, the upper side face of the elastic box is provided with an upper opening located in theopening, the lower side face of the elastic box is provided with a lower opening, and the upper opening and the lower opening are provided with non-return devices which can only be opened upwards; a box body is movably connected into the shell through a guide rail, one side face of the box body is open, and the rear end of the box body is provided with an airbag capable of being in contact with the rear end of the upper cover plate. By means of the technical scheme, accessories in the case are conveniently maintained or replaced, and the heat dissipation and dust proof effects of the case areimproved.

The invention discloses a noise elimination device for a heating and ventilation air conditioner ventilating system. The noise elimination device comprises a noise eliminator body which is in an L shape, the tip of the horizontal end of the noise eliminator body is connected with an air feeding pipe, and a flange disc used for connecting is fixed to the air feeding pipe; an air outlet is formed inthe lower part of the vertical end of the noise eliminator body, and a first convergence plate and a second convergence plate are fixed to the inner side of the noise eliminator body; a plurality ofdiagonal holes are formed in the first convergence plate and the second convergence plate correspondingly; and a conical convergence plate is mounted between the second convergence plate and the firstconvergence plate. The design is novel, through the arranged first convergence plate and second convergence plate and the diagonal holes formed in the first convergence plate and the second convergence plate, air passing through the interiors of the diagonal holes can be blown towards the center line of the first convergence plate or the second convergence plate, thus the air entering the interior of the noise eliminator body is gathered towards the middle, the situation that the air is blown towards the side wall of the noise eliminator body is reduced greatly, collision between the air andthe side wall is reduced, and the noise elimination effect is achieved.

The invention discloses an oil-immersed on-load voltage regulation power transformer which comprises a support rack, a tank body, a water conveying pipeline and a heat radiation device, wherein coilsare uniformly arranged inside the tank body; an oil storage tank is mounted on one side of the top of the tank body; an oil conveying pipeline is connected with the bottom of the oil storage tank; oneend of the oil conveying pipeline is connected with the coils and extends outside the tank body; a controller is mounted on one side of the tank body below the oil storage tank; a thin metal piece isarranged on side surfaces of the coils inside the tank body; fins are uniformly connected with one sides of the thin metal pieces; a vacuum plate is arranged at the top end inside the tank body; anda temperature sensor is mounted at one end of the vacuum plate inside the tank body. As a heat blocking layer is arranged at the top of the vacuum plate, sound absorption cotton is uniformly arrangedinside the vacuum plate below the heat blocking layer, and grooves are uniformly formed in the bottom of the vacuum plate, noise can be conveniently collected, a certain silencing effect can be achieved, and noise pollution can be reduced.

The invention discloses an exhaust system silencer for an automobile, and belongs to the field of automobile parts. The exhaust system silencer for the automobile comprises a shell, a partition plateand an inner silencing pipe, wherein the shell is provided with an inner cavity, one end of the inner cavity is in communication with a middle pipe of an exhaust system, the other end of the inner cavity is in communication with a tail pipe of the exhaust system, the partition plate is arranged in the inner cavity, a through hole is formed in the partition plate, and the partition plate divides the inner cavity into a front chamber and a rear chamber; the front chamber is in communication with the middle pipe, and the rear chamber is in communication with the tail pipe; and the inner silencingpipe is arranged in the rear chamber through an annular plate, the rear chamber is divided into a first rear chamber and a second rear chamber by the annular plate, one end of the inner silencing pipe extends into the second rear chamber. Due to the fact that the shell is internally provided with the partition plate and the inner silencing pipe, the silencing effect of the exhaust system silenceris better, and the comfort of the automobile is improved.

The invention discloses a wide-breadth magic buckle product and application thereof. The wide-breadth magic buckle product comprises a hook surface and a hair surface; the hook surface fabric and the hair surface fabric are connected; an adhesive layer is compounded on the back of the hook surface; the hair surface can be a fabric after napping of a single piece; and the breadth is more than 30 centimeters. The wide-breadth magic buckle product can be used as a floor material or a wall material and has the advantages of convenient spreading and sticking, convenient splicing, cleanness, environmental protection, and the like.

The invention discloses an automobile glass lifter mechanism, and relates to the technical field of automobile glass lifter mechanisms. The mechanism comprises an upper fixed supporting seat, whereina lower fixed supporting seat is arranged right below the upper fixed supporting seat, and a thin screw rod is rotatably connected between the upper fixed supporting seat and the lower fixed supporting seat at the central position. The glass lifter is novel in design, light in texture and low in manufacturing cost; glass is lifted and lowered by driving the thin screw rod through a servo motor; the glass lifter mechanism is different from lifters with a transmission arm type structure and a flexible type structure, the glass lifter mechanism is high in stability and enables vertical linear movement of the glass without deviation all the time; and meanwhile, the problems that a transmission lifter is subjected to abnormal nose and is easily damaged is solved; the practicability is effectively improved; the glass can be buffered to a certain degree when being lifted and lowered through a buffer mechanism, the problem that the glass and a vehicle door can collide when a traditional lifteris lifted is solved, and the use experience of a user is improved.

The invention provides an exhaust pipe for a vehicle. The exhaust pipe comprises a second pipe part, an inner pipe, a metal wire net, a baffle and a ring-shaped blocking piece, the inner pipe is arranged in the second pipe part, and the metal wire net is arranged between the inner wall of the tail end of the second pipe part and the inner pipe; and the baffle is arranged on the inner pipe in a sleeving mode and mounted on the end face of the tail end of the second pipe part, the left end face of the baffle is tightly attached to the metal wire net, the baffle is provided with a plurality of strip-shaped through holes, and the ring-shaped blocking piece is welded to the right end face of the baffle and shields the local parts of openings of the right ends of the strip-shaped through holes.According to the exhaust pipe for the vehicle, and due to the fact the structure is adopted, the silencing effect of the exhaust pipe is excellent.

The invention discloses an assembled light-weight wall construction process, which specifically relates to the field of building construction. Connectors are provided between them, and the specific construction steps are as follows: a) Install the filling board into the installation cavity of the wall frame at the bottom, and use screws to fix the position between the filling board and the fixing board; b) Select a wall The panel inserts the spacer at one end into the gap between the filler panel and the mounting cavity. The present invention fixes the position of the adjacent wall frame through the wall panel and the connecting piece, and adopts the fixation in the horizontal and vertical directions respectively to ensure the integrity of the overall wall appearance. The body frame is covered, and the screws used to fix the filler board are covered by the main board, so the possibility of loosening and misalignment caused by external force is greatly reduced, thereby ensuring the service life of the prefabricated wall.

The present invention relates to sewer pipe for building, and is especially silencing sewer pipe with soft inner layer. The silencing sewer pipe includes one outer layer of hard material and one inner layer of soft material, and the soft material can reduce the impact of water to pipe wall, reduce shock and silence. The silencing sewer pipe with soft inner layer may be used widely in buildings.

The invention discloses a muffler for an automobile exhaust system, which belongs to the field of automobile parts. The automobile exhaust system muffler includes: a shell, a partition and an inner muffler pipe. The shell has an inner cavity, one end of the inner cavity communicates with the middle pipe of the exhaust system, and the other end of the inner cavity communicates with the tailpipe of the exhaust system. The partition is set in the inner cavity, and the partition is provided with a through hole. The partition divides the inner cavity into a front chamber and a rear chamber. The front chamber is connected with the middle pipe, and the rear chamber is connected with the tail pipe. Pass; the inner muffler pipe is arranged in the rear chamber through an annular plate, the annular plate divides the rear chamber into the first rear chamber and the second rear chamber, and one end of the inner muffler pipe extends into the second rear chamber. Because the casing of the present invention is provided with a partition and an inner sound-absorbing pipe, the sound-absorbing effect of the present invention is better, and the comfort of the car is improved.