4results about How to "Avoid wasting investment" patented technology

The utility model relates to the field of railway traffic engineering, and discloses a contact net pillar convenient to overhaul based on a high platform, which comprises a stand column, a stand column base is arranged at the lower end of the stand column, and a cross beam is fixedly connected to the upper end of the side face of the stand column and used for installing a high-voltage wire. A protective wall is arranged on the side face of the stand column base, a handrail is fixedly connected to the upper side face of the protective wall, a riffled plate is arranged at the upper end of the inner wall of the protective wall, and the stand column protective device is arranged between the protective wall and the stand column base. The supporting column can be effectively protected from being affected by the external environment, durability is enhanced, and investment waste is reduced.

The invention discloses a hierarchical exploration means selection method for ecological restoration of historic abandoned mines, and belongs to the field of ecological restoration of historic abandoned mines. In an exploration range, the exploration level is comprehensively determined according to ecological problems, restoration directions, geological environment condition complexity and restoration modes; different exploration grades correspond to different types of exploration means selection combinations, so that engineering technicians in the field can specifically select the exploration means combinations according to the specific conditions of the historically left abandoned mines, and the situation that exploration work investment is wasted or follow-up ecological restoration measure design is affected due to insufficient exploration work investment is avoided.

The utility model relates to the technical field of flue gas desulfurization, and specifically relates to a desulfurization system oxidation air multipurpose system. The primary circulation system and the secondary circulation system are connected by an inlet flue, and the original flue gas flows through the primary circulation system and the secondary circulation system in sequence to carry out the desulfurization process. The primary circulation system includes two primary oxidation air fans, each of which is connected to the absorption tower through the same outlet pipeline. The primary oxidation air fan is used to introduce oxidation air into the outlet pipeline. The outlet pipeline is connected with a cleaning air pipeline and a sealing air pipeline. The cleaning air pipeline is connected to the wet electric dust collector to introduce cleaning air into the wet electric dust collector. The sealing air pipeline is connected to the accident spraying pipeline of the absorption tower to introduce sealing air into the accident spraying pipeline. The system improves the resource utilization rate and energy efficiency of the oxidation air system and avoids the investment waste caused by the repeated construction of the auxiliary air system, thereby significantly reducing the system operation and maintenance costs.

The application discloses a kind of old bridge staggered storey widening design method, comprising the following steps: at least one bridge tower is newly set on old bridge;With staggered storey way, beam is arranged in the space range above old bridge, and the newly-built separated double main girder located on both sides of old bridge is connected, and a plurality of cable-stayed cables are installed between the main girder and the bridge tower on both sides, and the cable-stayed cable is initially tensioned;The construction of new bridge auxiliary facilities is carried out, and then the cable-stayed cable is secondly tensioned, and the construction of new bridge is completed.The method of the application uses the bridge tower structure of cross setting type, so that the newly-built main girder on both sides can be pulled and fixed using the same bridge tower, effectively saving the cost, and the construction process will not have too much impact on the traffic of old bridge;After the old bridge is removed in the later period, the central hollow belt can be transformed into a bridge deck by adding a bridge deck system supported by the new bridge beam, the function of the old bridge is directly converted to the new bridge without the need to rebuild the old bridge, which can further save the cost and construction period.