8results about How to "Avoid mud" patented technology

The invention discloses an automatic position measuring system for the elevation of an underwater concrete pile head, and relates to the technical field of building construction machinery. A position finder is used in the system and comprises a water pressure sensor, a controller, a display, an alarm, a power supply module, an electric cylinder, a pressure sensor, a counterweight mechanism, a flow guide pipe and a slurry collecting cover. The position measuring method comprises the steps of judging that the elevation is reached through water pressure and confirming that the elevation is reached through the electric cylinder. According to the method, in the pouring process of the cast-in-place concrete pile, the height of the pile body can be accurately tracked and measured, it is guaranteed that the discharging port of the guide pipe is located in concrete all the time, it is guaranteed that the elevation of the final pile top meets the design requirement, and the problems of over-pouring and under-pouring are avoided.

The present invention relates to a device and method for treating gas leakage from the iron mouth of a blast furnace, and belongs to the technical field of blast furnace ironmaking production in the metallurgical industry. The technical scheme is as follows: a protective plate (5) is provided at the iron mouth of the blast furnace, an elliptical hole (11) is provided on the protective plate (5), and a pre-buried bracket (4) is fixed on the protective plate (5); a gas collecting pipe (2) is fixed to the upper half of the elliptical hole (11), a through-length notch (12) is provided on the pipe wall of the gas collecting pipe (2), and both ends of the gas collecting pipe (2) are respectively connected to a gas outlet pipe (1), and the gas outlet pipe (1) is fixed on the protective plate (5) in a vertical state; a mud sleeve (8) is casted on the protective plate (5) using a casting material. The beneficial effects of the present invention are: it can avoid the mud bubbling caused by the gas leaking from the high-pressure iron mouth area, which reduces the strength of the mud sleeve and causes mud to leak when plugging the mouth, prolonging the service life of the mud sleeve, while also reducing the iron mouth splashing, and improving the safety of blast furnace iron tapping.

The invention provides a subway station main body foundation pit structure in a complex environment and a construction method, and belongs to the technical field of subway station main body foundation pit structures. The subway station main body foundation pit structure structurally comprises a main body foundation pit formed in the complex environment of a three-face-ring building and a one-face-ring hillside, and a foundation pit structure is arranged in the main body foundation pit; the foundation pit structure comprises a pit edge base platform structure poured on the peripheral edge of the pit bottom of a foundation pit body, a plurality of water collecting pits are formed in the four corners of the inner side of the pit edge base platform structure, a pit-in-pit base platform structure is poured in the middle of the pit bottom of the foundation pit body, and a plurality of foundation pit side wall structures are poured on the top face of the pit edge base platform structure in the direction corresponding to a three-face ring building. And a water diversion filling layer structure is backfilled in the water accumulation prevention inclined pit in a layered non-tamping manner, so that the transverse extrusion stress on an outer drainage wall structure is reduced, and the problems that in the prior art, the side wall of the foundation pit structure is transversely extruded by soil-water pressure, and the side wall of the foundation pit structure is prone to water seepage and cracking are effectively solved.

This invention provides a grouped self-cleaning aeration and fluidization system, relating to the field of wastewater treatment aeration technology. It includes: a dissolved oxygen sensor, an intelligent control box, a blower, and grouped aeration modules. The intelligent control box includes a power distribution module, a control and protection module, a PLC control module, a cloud-based IoT gateway module, and a data acquisition module. The grouped aeration modules include multiple aeration units; each aeration unit includes multiple independent microporous hoses, hose fixing brackets, and butterfly valves. The dissolved oxygen sensor is connected to the PLC control module. The PLC control module, blower, and grouped aeration modules are connected sequentially. The PLC control module is connected to the butterfly valves. The PLC control module controls the opening and closing of the butterfly valves, performing self-cleaning and starting / stopping the grouped aeration modules. This invention can form directional water flow, achieving full-pool aeration and fluidization, preventing sludge accumulation at the bottom of the pool, and improving sludge suspension and oxygen transfer efficiency.

The invention provides a dust suppressant for a coal mine strip mine tunnel and a use method of the dust suppressant, and relates to the technical field of mine dust prevention and control. The dust suppressant is prepared from the following raw materials in percentage by mass: 18-43% of a humectant, 0.04-0.3% of a surfactant, 0.1-0.3% of a crusting agent, 1% of a preservative and the balance of water, wherein the total mass of the raw materials is 100%. The additive amount of each component in the formula is clear, the production process is simple, a large amount of water supply equipment is not needed during construction, the method can directly adapt to the existing operation conditions of a mine field, and large-scale popularization is facilitated.

This utility model discloses a modular, configurable curtain-type MBR pulse aeration structure, including two end members and at least one aeration member disposed between the two end members. The two end members and the at least one aeration member are detachably connected by a tenon and mortise structure to form an aeration structure body. The aeration structure body has an inner cavity with a lower opening and a surrounding inner circumferential wall. The upper end of the surrounding inner circumferential wall is connected to the top wall of the inner cavity and is shorter than the circumferential wall of the inner cavity, dividing the inner cavity into an air inlet chamber and an aeration chamber. This utility model adopts a modular, configurable design. By combining different numbers of aeration members, the length of the aeration structure can be flexibly adjusted to adapt to curtain-type MBR membrane modules of various sizes, completely solving the installation difficulties caused by the fixed size of existing aerators.

The utility model provides a spraying maintenance device for building construction. The spraying maintenance device comprises a rotating mechanism arranged on a trolley, a transverse moving mechanism arranged on the rotating mechanism, a lifting mechanism arranged on the transverse moving mechanism, a first spraying mechanism and a moving device arranged on the lifting mechanism, and a water return tank arranged at the top of the rotating mechanism. The whole structure is high in automation degree, manual long-time spraying maintenance on cleaning equipment is avoided, manpower and material resources can be greatly saved, the phenomena that the surrounding environment is wet and accumulated water is formed due to water are avoided, and meanwhile the phenomenon that the equipment or personnel are difficult to move due to muddy soil, and the construction progress is affected is avoided. And the method has a relatively high popularization value.

The utility model relates to the technical field of deck type reinforced concrete arch bridge structures, in particular to an on-arch stand column drainage structure of a deck type reinforced concrete arch bridge, which comprises a drainage platform, the drainage platform comprises a drainage slope and a diversion slope, and the drainage slope is obliquely intersected with the side wall of the acute angle side of an on-arch stand column. One side of the flow guide slope intersects with the drainage slope, the other side of the flow guide slope intersects with the top face of the arch rib, the drainage slope and the side wall of the on-arch stand column are arranged at an obtuse angle, the flow guide slope and the drainage slope are arranged at an obtuse angle, and a connecting steel bar is embedded in the drainage platform and connected with the on-arch stand column. According to the above-arch stand column drainage structure of the deck type reinforced concrete arch bridge, drainage and diversion of the acute angle side of the above-arch stand column are achieved by arranging the drainage slope and the diversion slope, accumulated water and accumulated mud are prevented from being formed on the side of the above-arch stand column, and a vegetation growing area is prevented from being formed; and the appearance and the durability of the column foot of the arch upper stand column of the deck type reinforced concrete arch bridge are ensured.