7results about How to "Protect the construction environment" patented technology

The invention relates to the technical field of steel rail maintenance, in particular to a grinding device for grinding a steel rail at a high speed based on a CBN grinding wheel. Comprising a carrier used for running on a steel rail, a plurality of transverse moving assemblies are symmetrically installed on the two sides of the carrier and correspond to the steel rail, swing assemblies are installed on the transverse moving assemblies, longitudinal moving assemblies are installed on the swing assemblies, grinding assemblies are installed on the longitudinal moving assemblies, and CBN grinding wheels are detachably connected to the grinding assemblies. Through mutual cooperation of the transverse moving assembly and the swinging assembly, the grinding assembly and the CBN grinding wheel can be controlled to grind the steel rail at a set angle, so that the grinding precision and reliability of different surfaces of the steel rail are improved; the CBN grinding wheel can easily polish and maintain the steel rail, and the purity of scrap iron generated in the polishing process is higher. And therefore, frequent replacement of the grinding wheel is avoided, the steel rail grinding efficiency is improved, and meanwhile a large amount of flying dust and peculiar smell are avoided.

The invention belongs to the technical field of civil engineering, and discloses a civil engineering concrete delivery pump device with an automatic cleaning function, the civil engineering concrete delivery pump device comprises a delivery pump box and a support, the top of the support is fixedly provided with the delivery pump box, the top of the delivery pump box is fixedly provided with a radiator, and the front side of the delivery pump box is provided with radiating holes. Through operation of a second motor, when a rotating wheel rotates, an impact head can abut against the inner wall of a vibration groove, the impact head is stored in telescopic grooves, along with continuous rotation of the rotating wheel, the other two sets of telescopic grooves enter the vibration groove, the impact head is reset through elastic potential energy of a compression spring, and vibration operation is achieved; compared with a traditional device, the device can stir concrete in the hopper, meanwhile, the material blocking partition plate is made to vibrate, stones with the concrete are prevented from being stacked and solidified on the material blocking partition plate, and the cleaning burden of workers is relieved.

The invention discloses a slurry protection wall implementation monitoring method and an optimization circulation system thereof, and relates to the field of slurry protection walls. The density of the raw mud in the mud collecting and detecting pool is detected through a universal detecting instrument, the raw mud meeting the design index requirement directly enters the mud pump backflow pool through the backflow pipe with the diameter being 100 mm, and the qualified raw mud is input into the pile casing through the mud pump. The raw mud with the density not meeting the design index requirement enters a mud feeding flocculation basin, and polyacrylamide is added into the raw mud with the density not meeting the design index requirement in the mud feeding flocculation basin, so that the indexes of various data of the raw mud meet the design requirement of the drilling wall protection mud; the qualified raw mud enters the mud pump backflow pool and then is input into the pile casing through the mud pump, the slag stone filtered out of the mud slag stone filtering pool is manually carried away, and the qualified raw mud flowing into the pile casing again meets the wall protection requirement.

The utility model discloses a road surface cutting and crushing device for road construction and maintenance, which relates to the field of road construction and comprises a mounting plate, a first shell is fixedly mounted on the lower surface of the mounting plate, water storage tanks are fixedly mounted on two sides of the upper surface of the mounting plate, and a first groove is formed in one end of the bottom wall of the first shell. The sponge is arranged, so that a layer of water film can be attached to the surface of the saw blade when the saw blade rotates, airflow nearby the saw blade can flow in an accelerated mode due to continuous rotation of the saw blade, the water film on the saw blade can evaporate rapidly, and the water film can evaporate rapidly. And cooling is efficiently conducted through evaporation, water waste is reduced, the situation that the service life of the saw blade is shortened due to the fact that the saw blade is overheated after working for a long time is avoided, the surface of the saw blade can be cleaned through sponge while cooling is conducted, the service life of the saw blade can be prolonged when the saw blade is cleaned through the sponge, and the stability during working is guaranteed.

The present application relates to the technical field of connecting piece, in particular to an extrusion type reinforcing steel bar connecting joint and a using method, the connecting joint comprises a sleeve, a plastic extrusion piece and a rigid extrusion piece, the plastic extrusion piece is sleeved on two pieces to be connected, and the rigid extrusion piece is arranged at the end of the plastic extrusion piece; the sleeve is sleeved on the outer periphery of the plastic extrusion piece; an extrusion groove is reserved in the sleeve; the plastic extrusion piece can be deformed under the extrusion of the rigid extrusion piece and fill the extrusion groove, so that the relative fixation of the two pieces to be connected is realized. The connecting joint can realize the simple and efficient connection of the two pieces to be connected, improve the work efficiency, protect the construction environment, and promote the safety and quality level of on-site construction.

The utility model relates to the technical field of foundation pit protection, and provides a municipal foundation pit protection device which comprises two first protection plates, two second protection plates, an inserting assembly and an adjustable supporting assembly, the first protection plates are parallel to the second protection plates, the second protection plates are parallel to the first protection plates, and the inserting assembly is arranged between the first protection plates and the second protection plates. The first protection plate and the second protection plate are vertically arranged, the inserting assembly is arranged between the first protection plate and the second protection plate, the adjustable supporting assembly is arranged on the outer side of the second protection plate, and the inserting assembly comprises a dovetail groove, a dovetail protruding block and a sealing gasket. The adjustable supporting assembly comprises a clamping block, a clamping groove, a first connecting piece, a second connecting piece, a rotating shaft, a connecting plate, a ground inserting rod, a fixing block and a through hole. According to the foundation pit protection device, construction safety is guaranteed, construction efficiency and economic benefits are improved, and the foundation pit protection device is an efficient and economical foundation pit protection solution suitable for various construction environments.

The utility model relates to a wall coating spraying device which comprises a base, an installation frame is arranged on the top face of the base, a spraying assembly is arranged on the installation frame, a material storage tank used for storing coating is further arranged on the top face of the base, an air compressor is arranged on the top of the material storage tank, and the two ends of the air compressor are communicated with the material storage tank and the inlet end of the spraying assembly through pipelines respectively. A purification assembly is further arranged on the mounting frame and located near the spraying assembly; a purification box of the purification assembly is fixedly mounted on the top surface of the base and is arranged close to the storage tank; the spraying assembly is changed into a movable composition structure, transverse unfolding can be conducted through a telescopic structure, rotary spraying can be conducted through a rotary structure, and therefore the spraying range can be effectively expanded based on telescopic adjustment of existing spraying equipment, so that the construction efficiency is improved, and the construction cost is reduced. And the air suction hoods fixed on the two sides of the spraying assembly can suck the paint, so that the air containing the paint is quickly extracted, and the surrounding construction environment is effectively protected.