4results 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 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.