33results about How to "To achieve the effect of sound insulation" patented technology

The invention belongs to the field of applied geophysical exploration/acoustic logging, and particularly relates to an acoustic logging-while-drilling device of a variable-diameter sound insulation structure. The acoustic logging-while-drilling device of the variable-diameter sound insulation structure comprises drill collars, a sound wave transmitting device and a sound wave receiving device are arranged outside the drill collars, and the acoustic logging-while-drilling device is characterized in that a variable-diameter sound insulator is arranged between the sound wave transmitting device and the sound wave receiving device, and the drill collars comprise a drill collar with a first inner diameter and a first length, a drill collar with a second inner diameter and a second length, a drill collar with a third inner diameter and a third length and a drill collar with a fourth inner diameter and a fourth length from the transmitting device to the receiving device. The acoustic logging-while-drilling device lowers processing difficulty and cost, and meanwhile enhances the mechanical strength of the drill collars. Energy transfer between an energy converter and the drill collars is structurally obstructed, and the variable-diameter sound insulator is combined to further eliminate the interference of the drill collars to stratum signals.

The invention provides a high-sound-insulation fireproof door. The high-sound-insulation fireproof door comprises a door frame (1) and a door leaf (2), wherein one side of the door leaf is hinged to the door frame (1). The door leaf (2) further comprises an outer panel (21) and an inner panel (22). Two punching acoustical boards (28) are further arranged between the outer panel (21) and the inner panel (22). Heat insulating and sound insulating core materials (23) are filled into an interlayer between each punching acoustical board (28) and the outer panel (21) or the inner panel (22). An air-filled cavity (29) is formed between the two punching acoustical boards (28). Due to the fact that the air-filled cavity composed of the two punching acoustical boards is formed in the door leaf of the high-sound-insulation fireproof door, the sound insulating effect is good, the heat preserving, airtight and fireproof functions are further possessed, an edge covering structure does not need to be arranged, the structure and the process are simple, and the appearance is attractive and high-grade.

The invention belongs to the field of applied geophysics/acoustic logging and relates to an optimized design method of a reducing sonic system sound insulator of an acoustic logging-while-drilling drill collar. The optimized design method of the reducing sonic system sound insulator of the acoustic logging-while-drilling drill collar comprises the following steps of: step 1, determining an optimal sound insulation resistance band frequency range of the sound insulator and an inner diameter of a water hole according to the design requirement; step 2, establishing a target function of the inner diameter of a reducing position of the drill collar, solving an overall situation minimal value of the target function and determining the optimized inner diameter; and step 3, further adjusting the combination of reducing lengths and establishing a target function; and solving an overall situation minimal value of the target function and determining the optimized combination of the reducing lengths. According to the optimized design method disclosed by the invention, the machining difficulty and cost are reduced and the mechanical strength of the drill collar is enhanced; the problems that a sound insulation effect of an etching groove sound insulator is controlled by a plurality of parameters including a groove width, a groove depth, a groove distance, the quantity of etching grooves and the like, the method only can be designed by experiences and a numerical simulation method and an optimize etching groove structure is difficult to find can be avoided.

The invention belongs to the technical field of gas turbines, and discloses a rotary blade type air filter with a high-efficiency silencing effect. The air filter comprises a course-effect filter and a self-cleaning filter, wherein the course-effect filter and the self-cleaning filter are arranged at an interval in an air inlet channel of a gas turbine; the self-cleaning filter comprises a plurality of filtering cylinders arranged in the air inlet channel up and down; each filtering cylinder is provided with a reverse blowing pipe communicated with an external compressed air source through a pipeline; each reverse blowing pipe is arranged in the air inlet channel at the rear end of the corresponding filtering cylinder; each filtering cylinder comprises a filtering cylinder framework; each filtering cylinder framework consists of an outer metal mesh layer and an inner metal mesh layer; each cylindrical filtering cylinder framework encircled by three sides is formed by one outer metal mesh layer and the corresponding inner metal mesh layer; one filtering layer is arranged between each outer metal mesh layer and the corresponding inner metal mesh layer; spiral flow guiding strips are obliquely arranged on each inner metal mesh layer; silencing modules are arranged between the course-effect filter and the self-cleaning filter.

The invention belongs to the technical field of gas turbines, and discloses a rotating vane type efficient noise elimination air filtration device for a gas turbine. The rotating vane type efficient noise elimination air filtration device comprises a coarse filtration device and a self-cleaning filter. The coarse filtration device and the self-cleaning filter are arranged in an air intake channel of the gas turbine in a spaced manner. The self-cleaning filter comprises a plurality of filter drums arranged in the air intake channel in an up-and-down manner. The filter drums are provided with reverse blowing pipes which are communicated with an external compressed air source through a pipeline. Each filter drum comprises a filter drum framework. Each filter drum framework is composed of an external metal net layer and an internal metal net layer which form the right-angle-U-shaped cylindrical filter drum framework. Filter layers are arranged between the external metal net layers and the internal metal net layers. Spiral flow guide strips are arranged on the internal metal net layers in an inclined manner. A noise elimination module is arranged at the position, behind the pipeline, in the air intake channel.

The invention belongs to the technical field of combustion gas turbines, and discloses a three-grade efficient noise-elimination air filtering system used for a combustion gas turbine. The three-grade efficient noise-elimination air filtering system comprises a filtering room. A low efficiency filter device, a medium efficiency filter and a high efficiency filter are arranged in the filtering room. An overhauling channel is arranged between the low efficiency filter device and the medium efficiency filter. An overhauling channel is arranged between the medium efficiency filter and the high efficiency filter. The low efficiency filter device comprises a connecting rod and a plurality of vertically-arranged low efficiency filters. The upper ends of the low efficiency filters are hinged to the interior of the filtering room. The other ends of the low efficiency filters are hinged to the same connecting rod. A stretchable air cylinder or a stretchable hydraulic cylinder is hinged to the bottom face of the low efficiency filter located at the lowermost end. The other end of the air cylinder or the hydraulic cylinder is hinged to the interior of the filtering room. A noise eliminating module is further arranged in the filtering room.

The invention belongs to the field of marine engineering vibration and noise, and provides a noise reduction and dustproof device for polygonal double-layer frame airbag underwater piling. The noise reduction and dustproof device for polygonal double-layer frame airbag underwater piling comprises an external air compressor, an air bag, and an inner and outer double-layer frame formed by connectingsteel transverse and vertical support rods, the inner and outer frames are connected by transverse and vertical support rods through pipe clamps, and regular polygonal arrangement is arranged in thecircumferential direction of a pile foundation according to construction arrangement, the inner and outer frames are connected by transverse support rods through the pipe clamps, the airbag is arranged between the inner and outer frames and is connected to the frames through prefabricated locks on the airbag, and the external air compressor is connected to the upper part of the airbag. The noise reduction and dustproof device for polygonal double-layer frame airbag underwater piling has the characteristics of being simple in structure, stable, durable, capable of being flexibly combined, disassembled and assembled multiple times, having designability, and good sound absorption and noise reduction effects, also, turbidity of the local seafloor water body near the pile foundation is effectively reduced because a cofferdam is formed, and maintenance of ecosystem balance is facilitated.

The invention discloses a preparation method for a fireproof air-permeable sound-insulation felt material, and belongs to the technical field of preparation of building sound-insulation materials. According to the method disclosed by the invention, firstly, phenol, a formaldehyde solution and a sodium hydroxide solution are mixed, a reaction under stirring is performed under the high-temperature condition to obtain phenolic resin, and because the phenolic resin has high-temperature resistance, the phenolic resin is added into raw materials to prepare the sound-insulation felt material; then modification is performed on the phenolic resin by utilizing melamine and urea, so that transfer of thermal energy to a resin substrate is blocked; a system of melamine and urea modified phenolic resinis researched and developed, so that a large number of rigid groups are formed in the system; seaweed fibers are put into hydrochloric acid for an acidification reaction, so that the structure of theseaweed fibers is looser, and circulation of a gas in gaps of the seaweed fibers is facilitated; in addition, a multi-layer net-shaped and porous structure is formed in the system, a porous medium isutilized, so that a sound insulation effect is achieved, and sound-insulation performance of the sound-insulation felt material is improved; and the method has broad application prospects.

The invention belongs to the technical field of gas turbines and discloses a three-stage efficient silencing air filtering unit for a gas turbine, which is used for solving the problem of poor damping and sound insulating effect in a conventional device. The three-stage efficient silencing air filtering unit for the gas turbine comprises a filtering room, wherein a low efficient filter, a medium efficiency filter and a high efficiency filter are arranged inside the filtering room in sequence, the medium efficiency filter comprises a plurality of filter drums arranged up and down, the filter drums are equipped with back flushing pipes communicated through a compressed air source outside a pipeline, and the back flushing pipes are arranged at the rear ends of the filter drums; each filter drum comprises a filter drum framework, the filter drum framework comprises an outer metal net layer and an inner metal net layer, the outer metal net layer and the inner metal net layer form a three-side surrounded cylindrical filter drum framework, a filtering layer is arranged between the outer metal net layer and the inner metal net layer, a spiral flow guide strip is arranged on the inner metal net layer, and the spiral flow guide strip is obliquely arranged on the inner metal net layer; and a silencing module is arranged between the low efficient filter and the medium efficiency filter.

The invention discloses a generator set with a sound insulation type ventilation system. The generator set comprises a ventilation plate with grids, wherein ventilation holes and audio reflection molded sheets are distributed on the grids, the audio reflection molded sheets are in one-to-one correspondence with the ventilation holes, fixed on the outer sides of the ventilation holes and used for reflecting audio out of the ventilation holes, and ventilation channels are formed between the audio reflection molded sheets and the ventilation holes. According to the generator set, the audio reflection molded sheets are arranged outside the ventilation holes of the grids of a sound insulation cover, noise, transmitted from the interior, of the generator set are partially reflected, consumed andtransmitted back into the ventilation holes, so that the noise is reduced; and due to the molded sheets, the ventilation in the generator set is carried out without directly passing through the ventilation holes, and an inflection point is formed, so that the wind speed is reduced, the air flow noise is reduced, and finally the purpose of noise reduction is achieved; and the sound insulation effect can be well achieved, the noise can be reduced within the required standard on the existing basis, the ventilation effect of the generator set can be guaranteed, and meanwhile, the ventilation noise formed in the ventilation process can be reduced, the structure is simple, and the appearance of the whole set and the use are not influenced.

The invention relates to the field of waste solid recycling, in particular to a method for producing a masonry material from foamed ceramic waste. The method comprises the following steps that: (1) foamed ceramic waste is recycled, crushed and screened for use, granular waste and powdery waste are obtained through screening, the particle size of the granular waste ranges from 1 mm to 30 mm, and the particle size of the powdery waste is smaller than 1 mm; step 2) the following raw materials in percentage by mass: 15-60% of cement, 5-40% of granular waste and 0-50% of powdery waste are weighed;(3) water is added, and the materials and water are mixed to prepare slurry; and (4) the slurry is molded, the foamed ceramic material is used as a mold during molding, and the molded mold and a slurry cured material are compounded into a whole, so that the masonry material can be obtained. Compared with the prior art, the masonry material obtained through the method has good sound insulation performance.

The invention belongs to the technical field of gas turbines and discloses an efficient noise elimination air intake device for a gas turbine. The efficient noise elimination air intake device comprises an air intake cavity, a filtering cylinder, a blowback cavity and a blowback system. The blowback cavity is located in the upper portion of the air intake cavity. One end of the filtering cylinder is located in the air intake cavity, and the other end of the filtering cylinder is located in the blowback cavity. The blowback system comprises a blowback pipe connected with a compression air source through a pipe. The blowback system further comprises a conical guiding device. The center line of the guiding device and the center line of the blowback pipe are located on the same straight line. The center line of the guiding device and the center line of the filtering cylinder are located on the same straight line. The top end of the guiding device is flush with the end face of the blowback pipe or stretches into the blowback pipe. The bottom face of the guiding device right faces the center of the filtering cylinder. A muffling module is assembled in the air intake cavity.

According to the stacked type lap joint process for the sunlight room, a front beam is stacked on a window body, and a front transfer beam is stacked on the front beam; the main beam is stacked on the front transfer beam; the wall-leaning hook is connected with a wall body; the rear transfer beam is stacked on the wall-leaning hook; the main beams are stacked on the rear transfer beams, the stacking mode that the cross beams are in lap joint between the main beams and the hollow glass is in lap joint above the cross beams is different from the common sunlight room dovetail groove machining mode in the market at present, the stacking type lap joint technology is adopted, construction of workers can be more convenient and simpler, the overall sealing effect is guaranteed, and the construction efficiency is improved. The large-span sunlight room can be easily manufactured through stacked lap joint, it can be guaranteed that the overall performance of the large-span sunlight room is not changed, the overall load bearing performance of the sunlight room is improved, sinking of the sunlight room is avoided, and the large-span sunlight room has the advantages of being high in strength, free of deformation, low in cost and the like. The overall tensile strength, the shear strength and the thermal deformation resistance strength are high, and the service life can be effectively prolonged.

The invention discloses a noise-reducing and anti-blocking bend which comprises a bent main body, wherein a threaded connector is mounted at one end of the bent main body; a filtering connector is inthreaded connection with the other end of the bent main body; a valve is arranged at one end of the bent main body and positioned below the threaded connector; the outer surface of the bent main bodyis covered with a sound-insulating layer; the outer surface of the sound-insulating layer is covered with a hard plastic tube; a sewage draining port is arranged at the bottom of the hard plastic tube, penetrates through the hard plastic tube, and communicates with the sound-insulating layer; a connecting plate is mounted on one side of the surface of the hard plastic tube; a telescopic rod is fixedly fixed on one side of the connecting plate through a hinge; and a fixing bracket is mounted at one end of the telescopic rod. The noise-reducing and anti-blocking bend has the noise-reducing and anti-blocking functions, and is convenient to fix, mount, repair and maintain; an obstruction to an inner cavity of the noise-reducing and anti-blocking bend can be conveniently removed without dismounting the noise-reducing and anti-blocking bend; and accordingly, the noise-reducing and anti-blocking bend has wide application prospects.

The invention belongs to the technical field of gas turbines and discloses an efficient energy-saving rotary blade type silencing air filtering device. The device comprises a coarse filtering device body and a self-cleaning filter; the self-cleaning filter comprises a filtering cylinder and a reverse blowing device; the coarse filtering device body comprises a connecting rod and a plurality of coarse filters arranged up and down; the upper end of each coarse filter is hinged to an air inlet channel; the other end of each coarse filter is hinged to the same connecting rod; the bottom surface of the coarse filter located at the lowermost end is hinged to an air cylinder or a hydraulic cylinder, and the air cylinder or the hydraulic cylinder can stretch out and retract; the other end of the air cylinder or the hydraulic cylinder is hinged to the bottom end inside the air inlet channel; a silencing module is arranged between the coarse filtering device and the self-cleaning filter; the silencing module comprises two first silencing module bodies and one or more second silencing module bodies; the second silencing module bodies are arranged between the first silencing module bodies alternately; each first silencing module body comprises two first lead fiber acoustic panel absorbers; a first glass wool layer is arranged between every two first lead fiber acoustic panel absorber.