7results about How to "Smooth pumping" patented technology

The application provides a shield balancing mud for a shield machine and a preparation method thereof, and belongs to the field of shield tunnel engineering. The shield balancing mud comprises the following raw materials: modified clay base material: 100 parts, composite flocculating agent: 6-15 parts, tackifying water-retaining agent: 1.5-4 parts, water-dispersing agent: 0.5-2.5 parts, organic crosslinking agent: 0.3-1.2 parts, thixotropy adjusting agent: 0.2-1.5 parts, and pH adjusting agent: 0.5-4 parts. In the application, the high-activity modified clay is used as a skeleton, the inorganic flocculation network is used to provide a dense structure resistant to water erosion, the borax-cellulose reversible crosslinking is used to realize the thixotropic property, the polyacrylamide is used to enhance the water-dispersing resistance, and the thixotropy adjusting agent is used to balance the dispersion and flocculation, so that the mud material simultaneously has excellent water-dispersing resistance and reversible thixotropy in a high-water-pressure water-rich stratum.

The invention relates to the technical field of tar residue treatment, in particular to mechanical residue removing equipment and process based on a tar residue storage tank, the residue removing equipment comprises the storage tank, a mixture conveying pump, a production unit and a guarantee unit, the mixture conveying pump is an intelligent variable frequency pump, and an outlet of the storage tank is connected with the input end of the mixture conveying pump; a flow detection module is mounted at the joint of the mixture conveying pump and the storage tank and is used for monitoring the flow of the tar residue mixture in real time and feeding back a signal to a control system of the mixture conveying pump; the output end of the mixture conveying pump is connected with the production unit, and the production unit is provided with two output ends, namely a solid output end and a liquid output end; the liquid output end is connected with the guarantee unit, and the guarantee unit comprises a showering system and a steaming and blowing system; the viscosity of the tar residues in the storage tank is greatly reduced through intermittent steaming and blowing softening and synchronous ammonia water spraying, the mixture conveying pump is smooth in pumping, and the problems that the tar residues in the storage tank are left and cannot be cleaned thoroughly are solved.

This utility model discloses a deep pit concrete conveying device, relating to the field of building construction technology. It includes a base and a first fixed rod: a first fixed rod is fixed to one side of the base, and a first sliding groove is formed on one side of the first fixed rod. A second motor is bolted to the top of the first fixed rod. The deep pit concrete conveying device drives the threaded shaft in the middle of the first fixed rod to rotate via the second motor. The rotation of the threaded shaft then drives the threaded seat connected to it to move axially, and the fixed seat is slidably connected to the limiting shaft in the middle of the second fixed rod. This allows the limiting shaft to limit and guide the movement of the fixed seat, ensuring that it moves vertically. This allows for easy adjustment of the fixed seat height according to the needs of the deep pit, adapting to different depths and complexities of deep pit construction environments, improving concrete conveying efficiency, and meeting the requirements for deep pit concrete use.

This utility model discloses a water-changing screen box with an adjustable screen, comprising: a motor-driven agitator rotating column that rotates an agitator plate to effectively stir the water, preventing seedlings from adsorbing and settling; an auxiliary water pump that enhances the pumping power of the siphon outlet pipe, improving water circulation efficiency; and a pumping pipe that directionally extracts the disturbed water. Combined with a detachable flexible filter cover, this design prevents seedlings and impurities from clogging the pipes, facilitates cleaning and replacement, ensures smooth water extraction, and overall improves the stability and controllability of the seedling environment.

The invention discloses pentaerythritol tetra (6-naphthyl hexanoic acid) ester and a preparation method and application thereof, the preparation method adopts two-step reaction of alkylation and esterification, the first step is that naphthalene and 5-hexenoic acid are subjected to alkylation reaction to generate 6-(1-naphthyl) hexanoic acid; and 2, carrying out a reaction on the 6-(1-naphthyl) hexanoic acid and thionyl chloride, and carrying out an esterification reaction with pentaerythritol to finally obtain the oily pentaerythritol tetra (6-naphthyl hexanoic acid) ester. The prepared pentaerythritol tetra (6-naphthyl hexanoate) ester has a structure with a symmetric four-arm core, a flexible alkyl chain and a rigid naphthalene end group, is shown as a formula (I), is used for lubrication and sealing of various equipment, and has the advantages of oxidation resistance, high and low temperature resistance, extreme pressure resistance, good lubrication and sealing performance and the like.

The utility model discloses a kind of photovoltaic cable weatherability packaging coating devices, including coating box, including the collection box for dressing collection, for providing coating space support frame, and for dressing recovery discharge recovery pipe, coating component, including for coating construction coating roller, liquid storage component, including fixed in the support frame top for temporary storage liquid storage tank, the utility model is stirred by component, it includes the second motor and second speed reducer fixed in the shell top, and stirring shaft and stirring blade for stirring dressing are installed in the inner chamber of inner bag, by the cooperation of stirring component, the dressing in the inner bag can be continuously stirred, by heater, thermocouple, liquid level sensor and PID controller in liquid storage component mutually cooperate, the heat medium in hollow interlayer can be heated, so that it keeps suitable temperature, prevent dressing solidification, ensure that subsequent pumping and coating operation can be smoothly carried out.

This utility model relates to the field of automotive wheel hub manufacturing technology and discloses a rapid exhaust and cooling device for automotive wheel hub molds, including an exhaust pin cover plate, an exhaust pipe, and an intelligent digital exhaust fan. The exhaust pin cover plate is locked onto the upper mold by a series of screws arranged in a ring at equal intervals to achieve a sealed fixation. The exhaust pipe includes four exhaust branch pipes and one exhaust main pipe. One end of each of the four exhaust branch pipes is connected to the exhaust pin cover plate, and the other end is connected to the exhaust main pipe. The exhaust main pipe is connected to the intelligent digital exhaust fan. The intelligent digital exhaust fan adjusts the exhaust interval and exhaust time according to the casting mold conditions, enabling rapid exhaust and cooling, improving production efficiency and wheel hub qualification rate, and also recovering high-temperature gas to heat bath water to save resources. It solves the problems of slow cooling and shrinkage cavities through efficient exhaust and utilizes exhaust waste heat for resource recovery, combining the advantages of production optimization and energy saving.