57results about How to "Control noise pollution" patented technology

The invention discloses a connecting structure of a fabricated concrete-filled steel tubular column body. The connecting structure comprises a first steel tubular column section and a second steel tubular column section; the first steel tubular column section is in butt joint with the second steel tubular column section, an inner steel tube is inserted into an inserting groove in a second outer steel tube, and a liner tube is arranged at the connecting position of a first outer steel tube and the second outer steel tube; the first outer steel tube, the second outer steel tube and the liner tube are welded into one through V-shaped groove welding; cementing materials are poured into gap areas in the first outer steel tube and the second outer steel tube, and air in the gap areas is exhausted though exhaust vents; and connecting plates are mounted on a first lug plate and a second lug plate through bolts. The connecting structure has the advantages that the shear-bearing ability of the connecting parts is improved, so that the column body reaches the normal section compression-bending bearing force and the shear-bearing ability which are not less than those of cast-in-place concrete,mounting is easy and convenient, the production and construction efficiency is improved, dust and noise pollution is further reduced, and the environmental-friendly requirements of green buildings are met.

The invention discloses a powdery talcum foaming agent. The foaming agent comprises acidified talcum, high-viscosity attapulgite clay powder, active attapulgite clay, sodium dodecyl sulfate, sodium percarbonate, sodium polyacrylate, sodium pyrophosphate and sodium poly[(naphthaleneformaldehyde)sulfonate]. The finished product of the powdery talcum foaming agent is produced by stirring ingredients of the powdery talcum foaming agent, milling the ingredients into powder and packaging the powder. The powdery talcum foaming agent has the advantages that the powdery talcum foaming agent has strong foaming capacity, high foam expansion and high foam yield in unit volume, has good foam outer membrane tenacity and is not easy to break, has good foam stability, can not be defoamed for a long time, is exquisite in foam, is uniform in sizes of holes generated in media and has low bleeding quantity and good compatibility of used media. The products produced by using the powdery talcum foaming agent not only can effectively control noise pollution but also have the functions of preserving heat and purifying air. The powdery talcum foaming agent is suitable for producing lightweight boards, lightweight walls and noise reducing products.

The invention discloses a powdery kieselguhr foamer, wherein the essential of the technical scheme is as follows: the powdery kieselguhr foamer is composed of dried kieselguhr, high-viscosity attapulgite clay powder, sodium dodecyl sulphate, sodium percarbonate, sodium polyacrylate, sodium pyrophosphate and sodium naphthaldehyde sulfonate. The powdery kieselguhr foamer finished product is obtained by stirring, grinding and packaging the ingredients of the powdery kieselguhr foamer. The powdery kieselguhr foamer has the advantages of being strong in foaming capacity, high in foaming times, high in foam production amount per unit volume, good in the toughness of foam outer membranes with low possibility of breaking, good in foam stability, unable to defoam for a long time, fine in foam, uniform in the size of the holes generated in a medium, low in bleeding amount, good in the compatibility of the used medium, and the like. The products produced by virtue of the powdery kieselguhr foamer are capable of effectively controlling noise pollution, and have the functions of insulating heat and purifying air; and the powdery kieselguhr foamer is suitable for producing light-weight boards, light-weight wall bodies as well as silencing and noise-reducing products.

The invention discloses a kaolin flame-retardant foaming agent. The technical scheme has the following key points: the kaolin flame-retardant foaming agent comprises dried kaolin, activated attapulgite, sodium hydrogen carbonate, sodium alkyl benzene sulfonate, sodium polyacrylate, sodium pyrophosphate, ammonium polyphosphate and zinc borate. The finished product of the kaolin flame-retardant foaming agent is prepared by stirring, grinding and packaging the ingredients. Water is added into the kaolin flame-retardant foaming agent, and a great deal of gas is rapidly released after the water solution is stirred at high speed, so that porous foam slurry can be formed; the foam slurry is jetted by a high-pressure water gun so as to be directly used for putting out a fire; the foam slurry is stably covered on the surface layer of combustible material so as to form a foam slurry film; and the foam slurry film can rapidly isolate the contact between the combustible material and the air, and the combustible material is prevented from continuously burning, so that the aims of inflaming retarding and extinguishing a fire can be achieved. The kaolin flame-retardant foaming agent is suitable for producing light weight boards, light weight walls and noise reduction products which have the inflaming retarding and fire extinguishing functions.

The invention discloses an unfired carbide slag foamed acoustic panel. According to the technical scheme, a built-in frame is flatly arranged on a mould, carbide slag cement foaming agents are poured on the periphery of the built-in frame after short steel tubes in the built-in frame are inserted into stand columns, the built-in frame is completely embedded inside the carbide slag cement foaming agents, maintenance is carried out according to a regular maintenance method of cement products, and an unfired carbide slag foamed acoustic panel finished product is packed; the carbide slag cement foaming agents are formed by acidized carbide slag, high-viscosity attapulgite clay powder, cement and other raw materials; the carbide slag cement foaming agents and the built-in frame form a whole after solidification, and thus the overall strength, the counter bending capability and the actual using effects of the unfired carbide slag foamed acoustic panel are improved. The unfired carbide slag foamed acoustic panel can effectively control noise pollution and further has the functions of heat preservation and air purification. The unfired carbide slag foamed acoustic panel is suitable for being mounted on facilities such as expressways, viaducts, urban light rails, metros and public places.

The invention discloses an unfired sludge foaming acoustical board. According to the technical scheme, the unfired sludge foaming acoustical board is characterized in that a built-in frame is horizontally placed on a mold, after short steel pipes in the built-in frame are inserted into stand columns, sludge cement foaming agent is poured on the periphery of the built-in frame, the built-in frame is totally inlaid in the sludge cement foaming agent, maintenance is performed according to a conventional cement product maintenance method, and packaging is performed to form an unfired sludge foaming acoustical board finished product; the sludge cement foaming agent is prepared from a sludge mixture, high-viscosity attapulgite clay powder, cement and other raw materials; the sludge cement foaming agent and the built-in frame form an integrated whole after the sludge cement foaming agent is cured, and thus the overall strength, the bending resistance and the actual using effect of the unfired sludge foaming acoustical board are improved. The unfired sludge foaming acoustical board not only can be used for effectively controlling noise pollution but also has the functions of heat preservation and air purification and is suitable for being mounted in facilities such as expressways, viaducts, urban light rails, subways, public places and the like.

The invention discloses a powdery basalt foaming agent. The foaming agent comprises porous basalt, high-viscosity attapulgite clay powder, active attapulgite clay, sodium dodecyl sulfate, sodium percarbonate, sodium polyacrylate, sodium pyrophosphate and sodium poly[(naphthaleneformaldehyde)sulfonate]. The finished product of the powdery basalt foaming agent is produced by stirring ingredients of the powdery basalt foaming agent, milling the ingredients into powder and packaging the powder. The powdery basalt foaming agent has the advantages that the powdery basalt foaming agent has strong foaming capacity, high foam expansion and high foam yield in unit volume, has good foam outer membrane tenacity and is not easy to break, has good foam stability, can not be defoamed for a long time, is exquisite in foam, is uniform in sizes of holes generated in media and has low bleeding quantity and good compatibility of used media. The products produced by using the powdery basalt foaming agent not only can effectively control noise pollution but also have the functions of preserving heat and purifying air. The powdery basalt foaming agent is suitable for producing lightweight boards, lightweight walls and noise reducing products.

The invention discloses processing equipment for a supporting sleeve of a wall pull screw. The processing equipment comprises a frame, wherein an upper pressure wheel and a lower pressure wheel matched with the upper pressure wheel, as well as a power mechanism used for driving the upper pressure wheel and the lower pressure wheel to synchronously rotate in opposite directions, are mounted on the frame, wherein upper rolled thread teeth used for pressing internal threads I at the upper part of the supporting sleeve are formed on the upper pressure wheel; lower rolled thread teeth used for pressing internal threads II at the lower part of the supporting sleeve are formed on the lower pressure wheel. The processing equipment adopts the rolling mode to effectively protect the rolled thread teeth from being damaged by impact forces so as to guarantee continuous operation of the processing job, and effectively improves the operation environment due to low noise generated during rolling processing.

The invention discloses a powdery pyroclastic rock foaming agent. Main points of the technical scheme are as follows: the powdery pyroclastic rock foaming agent is composed of pyroclastic rock, hyperviscous attapulgite powder, sodium dodecyl sulfate, sodium percarbonate, sodium polyacrylat, sodium acid pyrophosphate and sodium poly(naphthaleneformaldehyde) sulfonate; and the above ingredients of the powdery pyroclastic rock foaming agent undergo stirring, milling and packaging so as to obtain a finished product of the powdery pyroclastic rock foaming agent. The powdery pyroclastic rock foaming agent has advantages of strong foaming capability, high bubbling times, large quantity of foams produced per unit volume, good toughness of outer foam film capable of not being easily broken, good foam stability, no defoaming for a long time, fine foam, uniform size of pores generated inside a medium, low bleeding amount, good compatibility of the medium used and the like. Products produced by the use of the powdery pyroclastic rock foaming agent can be used to effectively control noise pollution and also have functions of heat insulation and air purification. The powdery pyroclastic rock foaming agent is suitable for production of lightweight sheet materials, lightweight walls and noise reduction products.

The invention provides an automobile whistling classification method based on a support vector machine. Aan air sonar sensor is used for receiving a sound signal; p; performing framing and windowing processing on the received signal; e; extracting five types of acoustic signal characteristics including sub-band energy, sub-band energy variance, frequency band total kurtosis, sub-band kurtosis meanvalue and short-time average zero-crossing rate, then constructing a decision function, repeating the training samples, dividing the training samples into whistling sounds and environmental noises through hyperplanes, and training an optimal hyperplane classifier; and finally, actual measurement signals are received, and an optimal hyperplane classifier is used for classifying the automobile whistling sound and the environmental noise. According to the invention, the sound signals of the automobile whistling on the road can be accurately classified and identified.

The invention discloses an unfired serpentine foaming acoustical board. According to the technical scheme, the unfired serpentine foaming acoustical board is characterized in that a built-in frame is horizontally placed on a mold, after short steel pipes in the built-in frame are inserted into stand columns, serpentine cement foaming agent is poured on the periphery of the built-in frame, the built-in frame is totally inlaid in the serpentine cement foaming agent, maintenance is performed according to a conventional cement product maintenance method, and packaging is performed to form an unfired serpentine foaming acoustical board finished product; the serpentine cement foaming agent is prepared from serpentine, high-viscosity attapulgite clay powder, cement and other raw materials; the serpentine cement foaming agent and the built-in frame form an integrated whole after the serpentine cement foaming agent is cured, and thus the overall strength, the bending resistance and the actual using effect of the unfired serpentine foaming acoustical board are improved. The unfired serpentine foaming acoustical board not only can be used for effectively controlling noise pollution but also has the functions of heat preservation and air purification and is suitable for being mounted in facilities such as expressways, viaducts, urban light rails, subways, public places and the like.

The invention discloses an unfired water-quenched slag foaming acoustical board. According to the technical scheme, the unfired water-quenched slag foaming acoustical board is characterized in that a built-in frame is horizontally placed on a mold, after short steel pipes in the built-in frame are inserted into stand columns, water-quenched slag cement foaming agent is poured on the periphery of the built-in frame, the built-in frame is totally inlaid in the water-quenched slag cement foaming agent, maintenance is performed according to a conventional cement product maintenance method, and packaging is performed to form an unfired water-quenched slag foaming acoustical board finished product; the water-quenched slag cement foaming agent is prepared from water-quenched slag, high-viscosity attapulgite clay powder, cement and other raw materials; the water-quenched slag cement foaming agent and the built-in frame form an integrated whole after the water-quenched slag cement foaming agent is cured, and thus the overall strength, the bending resistance and the actual using effect of the unfired water-quenched slag foaming acoustical board are improved. The unfired water-quenched slag foaming acoustical board not only can be used for effectively controlling noise pollution but also has the functions of heat preservation and air purification and is suitable for being mounted in facilities such as expressways, viaducts, urban light rails, subways, public places and the like.

The invention discloses an unburned attapulgite foam sound-absorbing board. The technical scheme is characterized in that an internal frame is flatly placed on a mould, after short steel tubes in the internal frame are inserted into columns, an attapulgite cement foaming agent is poured on the periphery of the internal frame, the internal frame is totally inlaid in the inside of the attapulgite cement foaming agent, curing is carried out according to a conventional cement product curing method, and packaging is performed to form an unburned attapulgite foam sound-absorbing board finished product. The internal frame is inlaid in the unburned attapulgite foam sound-absorbing board finished product, and the attapulgite cement foaming agent is integrated with the internal frame into a whole after curing, so that integral strength, bending resistance capacity and actual use effect of the unburned attapulgite foam sound-absorbing board are improved. The unburned attapulgite foam sound-absorbing board can not only effectively control noise pollution but also has functions in thermal insulation and air purification; besides, the unburned attapulgite foam sound-absorbing board is suitable for being mounted in facilities such as highways, viaducts, urban light rails, subways, factories, warehouses and public places.

The invention discloses a steel-wire belt cut-off device for a square-section bead ring. The device comprises an actuating mechanism and a gas-liquid power system, wherein the actuating mechanism consists of a mounting bracket, a machine nozzle, a cutter, an oil hydraulic cylinder and a cutter connector; the machine nozzle is formed at the lower part of the mounting bracket; the oil hydraulic cylinder is arranged at the upper part of the mounting bracket; the cutter is arranged on a piston rod of the oil hydraulic cylinder through the cutter connector, and a plane Alpha on which a cutter blade and the cutter are arranged is coincided with a plane penetrating the centerline L of the piston rod; the cutter blade corresponds to the outlet of the machine nozzle; the gas-liquid power system is connected with the oil hydraulic cylinder; and the gas-liquid power system is used for pushing the piston rod to move up and down to drive the cutter at the lower part of the piston rod to cut off the steel-wire belt coming out of the machine nozzle. According to the invention, the travel of the cut-off cutter is less than 10 mm, and the device can conduct closed operation to completely eliminate security risks. The service life of the cutter and the machine nozzle is 3-5 times longer than that of similar devices.

The invention discloses an unfired gypsum foaming acoustical board. According to the technical scheme, the unfired gypsum foaming acoustical board is characterized in that a built-in frame is horizontally placed on a mold, after short steel pipes in the built-in frame are inserted into stand columns, gypsum cement foaming agent is poured on the periphery of the built-in frame, the built-in frame is totally inlaid in the gypsum cement foaming agent, maintenance is performed according to a conventional cement product maintenance method, and packaging is performed to form an unfired gypsum foaming acoustical board finished product; the gypsum cement foaming agent is prepared from calcined gypsum, high-viscosity attapulgite clay powder, cement and other raw materials; the gypsum cement foaming agent and the built-in frame form an integrated whole after the gypsum cement foaming agent is cured, and thus the overall strength, the bending resistance and the actual using effect of the unfired gypsum foaming acoustical board are improved. The unfired gypsum foaming acoustical board not only can be used for effectively controlling noise pollution but also has the functions of heat preservation and air purification and is suitable for being mounted in facilities such as expressways, viaducts, urban light rails, subways, public places and the like.

The invention comprises a noise absorbing device for a vacuum pump. The noise absorbing device comprises a base plate, a housing and more than one stage of heat dissipation components, wherein the housing is fixedly arranged on the top of the base plate, and each stage of heat dissipation components is fixedly arranged on the outer surface of the housing respectively; each stage of heat dissipation components comprises a temperature controller, an air draft device, an air supply device, a radiating pipeline and a radiator respectively; the temperature controller is fixedly arranged in the housing, the air draft device and the air supply device are obliquely and fixedly on the outer surface of the housing in a sealing mode at an interval, the air draft device and the air supply device are electrically connected to the temperature controller respectively, the radiator is fixedly arranged on the outer surface of the housing between the air draft device and the air supply device, and the two ends of the radiating pipeline are connected to the air draft device and the air supply device respectively in the sealing mode, and the middle part of the radiating pipeline is tortuously embedded in the radiator; moreover, a through hole for connecting the vacuum pump with the outside is further formed in the housing. The noise absorbing device can not only reduce the noise pollution of the vacuum pump effectively but also dissipate heat for the vacuum pump effectively.

The invention discloses an unfired basalt foaming acoustical board. According to the technical scheme, the unfired basalt foaming acoustical board is characterized in that a built-in frame is horizontally placed on a mold, after short steel pipes in the built-in frame are inserted into stand columns, basalt cement foaming agent is poured on the periphery of the built-in frame, the built-in frame is totally inlaid in the basalt cement foaming agent, maintenance is performed according to a conventional cement product maintenance method, and packaging is performed to form an unfired basalt foaming acoustical board finished product; the basalt cement foaming agent is prepared from vesicular basalt, high-viscosity attapulgite clay powder, cement and other raw materials; the basalt cement foaming agent and the built-in frame form an integrated whole after the basalt cement foaming agent is cured, and thus the overall strength, the bending resistance and the actual using effect of the unfired basalt foaming acoustical board are improved. The unfired basalt foaming acoustical board not only can be used for effectively controlling noise pollution but also has the functions of heat preservation and air purification and is suitable for being mounted in facilities such as expressways, viaducts, urban light rails, subways, public places and the like.

The invention discloses an unfired bauxite foamed acoustic board. The technical scheme is characterized in that an internal frame is horizontally placed on a mould, after short steel pipes in the internal frame are inserted into vertical columns, bauxite cement foaming agent is poured on the periphery of the internal frame, the internal frame is completely embedded inside the bauxite cement foaming agent, and the board is maintained according conventional cement product maintenance methods and packaged to form a finished product of the unfired bauxite foamed acoustic board. The bauxite cement foaming agent is composed of bauxite clinker, high-viscosity altapulgite clay powder, cement and the like. The bauxite cement foaming agent is cured and integrated with the internal frame, and integral intensity, deflection resistance and actual using effects of the unfired bauxite foamed acoustic board are improved. The unfired bauxite foamed acoustic board not only can effectively control noise pollution but also has functions of thermal insulation and air purification and is suitable for being mounted in facilities such as highways, viaducts, urban light rails, subways, public places and the like.

The invention discloses an unfired I / S clay mineral foaming acoustic panel. According to the technical scheme, the unfired I / S clay mineral foaming acoustic panel is characterized in that a built-in frame is horizontally placed on a die, after short steel pipes in the built-in frame are inserted into stand columns, the periphery of the build-in frame is poured with an I / S clay cement foaming agent, the built-in frame is completely embedded into the I / S clay cement foaming agent, and the obtained product is maintained through a conventional maintaining method for cement products and is packed into a finished unfired I / S clay foaming acoustic panel; the I / S clay cement foaming agent is made of I / S clay, high-sticky attapulgite clay, cement and other raw materials; after the I / S clay cement foaming agent is solidified, an integral body is formed by the I / S clay cement foaming agent and the built-in frame, the overall intensity, the bend resisting capability and the practical use effect of the unfired I / S clay foaming acoustic panel are enhanced, noise pollution can be effectively controlled, the heat preservation and air purifying functions are achieved, and the unfired I / S clay mineral foaming acoustic panel is suitable for being installed in expressways, urban light rails, public places and other facilities.

The invention belongs to the technical field of environmental protection engineering, and discloses a sound-insulation retaining wall for a construction site. The invention provides the technical scheme points that the sound-insulation retaining wall for the construction site comprises multiple angle posts, wherein the angle posts are arranged in a vertical direction and are distributed around a noise source; pins are arranged at the bottom ends of the angle posts; at least one side pillar is arranged between every two adjacent angle posts and is arranged in a vertical direction; pins are further arranged at the bottom ends of the side pillars; two pairs of inserting slots are formed in the opposite side walls of every two adjacent side pillars and the opposite side walls of the side pillars and the angle posts; and clapboards are inserted into the two pairs of inserting slots. The sound-insulation retaining wall for the construction site has the effects of convenience in building anddisassembling, convenience and quickness in arranging nearby the noise source, capability of intercepting noise in a large range, and capability of effectively controlling the noise pollution of the construction site.

The invention discloses a powdery coke gemstone foaming agent. The gist of the technical scheme is that the powdery coke gemstone foaming agent is composed of cooked coke gemstone, high-viscosity attapulgite clay powder, active attapulgite clay, dodecane It is composed of sodium base sulfate, sodium percarbonate, sodium polyacrylate, sodium pyrophosphate and polynaphthaldehyde sulfonate sodium salt; the powdery coke gem blowing agent ingredients are stirred, pulverized and packaged as powder coke gem foaming agent finished product. Powdered coke gemstone foaming agent has strong foaming ability, high foaming multiple, large foam production per unit volume, good toughness of foam outer film, not easy to break, good foam stability, long-term non-foaming, fine foam, and in the medium The generated holes have the advantages of uniform size, low bleeding and good compatibility with the medium used. Products produced with powdered coke gem foaming agent can not only effectively control noise pollution, but also have the functions of heat preservation and air purification; powder coke gem foaming agent is suitable for the production of refractory light boards, light walls and Noise reduction products.

The invention discloses an unfired pumice foamed acoustic panel. According to the technical scheme, a built-in frame is flatly arranged on a mould, pumice cement foaming agents are poured on the periphery of the built-in frame after stand columns are inserted into short steel tubes in the built-in frame, the built-in frame is completely embedded inside the pumice cement foaming agents, maintenance is carried out according to a regular maintenance method of cement products, and an unfired pumice foamed acoustic panel finished product is packed; the pumice cement foaming agents are formed by pumice, high-viscosity attapulgite clay powder, cement and other raw materials; the pumice cement foaming agents and the built-in frame form a whole after solidification, and thus the overall strength, the counter bending capability and the actual using effects of the unfired pumice foamed acoustic panel are improved. The unfired pumice foamed acoustic panel can effectively control noise pollution and further has the functions of heat preservation and air purification. The unfired pumice foamed acoustic panel is suitable for being mounted on facilities such as expressways, viaducts, urban light rails, metros and public places.

Provided herein are transit systems for travel overhead of streets, having: at least a first vehicle and a second vehicle; a main track on which the vehicles travel, the main track having a suspended overhead rail over the streets by a support structure, such that the vehicles travel at an elevated level overhead of street level; docking stations for the vehicles to lower to the street level for loading and / or unloading passengers and / or cargo; a two-position switch at each docking station, having cables enabling vertical movement of the vehicle, and a replacement track; wherein the two-position switch allows for docking of the first vehicle while the second vehicle passes the docked first vehicle, by enabling lowering of the first vehicle from the elevated level to the street level, and the replacement track providing a track portion for the second vehicle on which to pass the first vehicle.

The invention discloses an unfired ardealite foamed acoustic board. The technical scheme is characterized in that an internal frame is horizontally placed on a mould, after short steel pipes in the internal frame are inserted into vertical columns, ardealite cement foaming agent is poured on the periphery of the internal frame, the internal frame is completely embedded inside the ardealite cement foaming agent, and the board is maintained according conventional cement product maintenance methods and packaged to form a finished product of the unfired ardealite foamed acoustic board. The ardealite cement foaming agent is composed of dewater ardealite, high-viscosity altapulgite clay powder, cement and the like. The ardealite cement foaming agent is cured and integrated with the internal frame, and integral intensity, deflection resistance and actual using effects of the unfired ardealite foamed acoustic board are improved. The unfired ardealite foamed acoustic board not only can effectively control noise pollution but also has functions of thermal insulation and air purification and is suitable for being mounted in facilities such as highways, viaducts, urban light rails, subways, public places and the like.

The invention discloses an environment-friendly fan, and relates to the field of industrial machinery. The environment-friendly fan comprises an air inlet, a casing, a wind wheel, a motor, a support structure and a base, wherein the support structure comprises three support rods, a vibration reducer is arranged at a connecting part of the support structure and the base, a muffler and an isolation net are arranged at the air inlet part, a muffling insertion sheet is arranged in the air inlet, the base and the motor are separated by the three support rods, through the design of the vibration reducer, the muffler insertion sheet and the muffler, the noise pollution is effectively controlled, through the arrangement of the isolation net, impurities cannot enter the motor through the air inlet, and each part inside the fan is protected. The environment-friendly fan has the advantages that the design is simple and ingenious, and the popularization and the use are convenient.

The invention discloses an unfired mica foaming acoustical board. According to the technical scheme, the unfired mica foaming acoustical board is characterized in that a built-in frame is horizontally placed on a mold, after short steel pipes in the built-in frame are inserted into stand columns, mica cement foaming agent is poured on the periphery of the built-in frame, the built-in frame is totally inlaid in the mica cement foaming agent, maintenance is performed according to a conventional cement product maintenance method, and packaging is performed to form an unfired mica foaming acoustical board finished product; the mica cement foaming agent is prepared from sericite, high-viscosity attapulgite clay powder, cement and other raw materials; the mica cement foaming agent and the built-in frame form an integrated whole after the mica cement foaming agent is cured, and thus the overall strength, the bending resistance and the actual using effect of the unfired mica foaming acoustical board are improved. The unfired mica foaming acoustical board not only can be used for effectively controlling noise pollution but also has the functions of heat preservation and air purification and is suitable for being mounted in facilities such as expressways, viaducts, urban light rails, subways, public places and the like.

A split-starting construction method for an ultra-deep circular shaft double-line shield. During construction, the first shield and the connecting bridge are assembled in the first area; the trolley platform is arranged in the second area; the trolley goes down the well And stacked on the platform of the trolley; install the reaction frame and support, and complete the starting preparation; the first shield tunneling starts; after the first shield tunnels to meet the requirements of the second shield trolley to go down the well, The trolley platform is arranged in the first area; the trolley goes down and stacked on the trolley platform; the preparation work for the departure of the second shield machine is completed. In the limited space, the method of the present invention adopts the method of stacking trolleys underground to make full use of the underground space, which can effectively reduce the extension of the pipeline and avoid various problems caused by the extension of the pipeline, and has the advantages of simple construction operation, economy and high efficiency. The advantages.

The invention discloses an unfired illite foaming acoustic panel. According to the technical scheme, the unfired illite foaming acoustic panel is characterized in that a built-in frame is horizontally placed on a die, after short steel pipes in the built-in frame are inserted into stand columns, the periphery of the build-in frame is poured with an illite cement foaming agent, the built-in frame is completely embedded into the illite cement foaming agent, and the obtained product is maintained through a conventional maintaining method for cement products and is packed into a finished unfired illite foaming acoustic panel; the illite cement foaming agent is made of illite, high-sticky attapulgite clay, cement and other raw materials; after the illite cement foaming agent is solidified, an integral body is formed by the illite cement foaming agent and the built-in frame, the overall intensity, the bend resisting capability and the practical use effect of the unfired illite foaming acoustic panel are enhanced, noise pollution can be effectively controlled through the unfired illite foaming acoustic panel, the heat preservation and air purifying functions are achieved, and the unfired illite foaming acoustic panel is suitable for being installed in expressways, viaducts, metros, factories, public places and other facilities.

This coupling device comprises a support body, a first clamping jaw, a clamping member comprising a second clamping jaw and a connecting portion, the clamping member being hingedly mounted on the support body between a clamping position in which the first and second clamping jaws are configured to clamp a traction cable; a biasing device configured to bias the clamping member towards the clamping position, and an actuation member configured to actuate a displacement of the clamping member between its clamping and release positions, the actuation member being slidably mounted on the support body between a first stable position in which the clamping member is in the clamping position, and a second stable position in which the clamping member is in the release position.

The invention discloses a fire-free rectorite foamed sound-absorbing board. The main point of the technical proposal is that the built-in frame is placed flat on the mould, and after the short steel pipes in the built-in frame are inserted into the columns, the rectorite cement foaming agent is used It is poured on the periphery of the built-in frame, and the built-in frame is completely embedded in the rectorite cement foaming agent. It is cured according to the conventional curing method of cement products, and it is packaged as a finished product of non-burning rectorite foam sound-absorbing board; rectorite cement foam The agent is composed of rectorite, high-viscosity attapulgite clay powder and cement and other raw materials; after solidification, the rectorite cement foaming agent forms an integrated whole with the built-in frame, which increases the performance of non-burning rectorite foam sound-absorbing panels. Overall strength, bending resistance and practical use effect. Non-burning rectorite foam sound-absorbing panels can not only effectively control noise pollution, but also have the functions of heat preservation and air purification. Rectorite foam sound-absorbing panels are suitable for installation in highways, viaducts, urban light rail, subways, public places, etc. in the facility.