42results about How to "Improve antifreeze performance" patented technology

The invention discloses a concrete foundation-free highway culvert for a permafrost region. The culvert is characterized by comprising a graded gravel foundation, a steel corrugated pipe and a natural gravel backfill layer, wherein the graded gravel foundation with a certain thickness is laid on a design substrate; steel corrugated pipe sections are arranged on the graded gravel foundation, and are connected through flanges and strong-strength bolts; a gap between every two adjacent pipe sections is sealed by an asbestos pad; the inner and outer surfaces of the culvert pipe are coated with asphalt; after the culvert pipe is firmly arranged, natural gravel is synchronously and symmetrically backfilled and compacted on the two sides of the pipe culvert in a layered way; the steel corrugated pipe is made from Q235-A, pipe section flanges are arranged at the two ends of the steel corrugated pipe, the wall of the steel corrugated pipe is 3 to 6mm thick, and the surface of the steel corrugated pipe is galvanized in a hot-dipping way. The culvert has the advantages of convenience in construction, low labor intensity, high construction speed, lower construction cost, high deformation resistance and slight freezing influence, the safety and the durability of the culvert can be effectively ensured, the problem of non-uniform sedimentation of a culvert and a foundation in the permafrost region is improved, and the post-maintenance cost is reduced.

The present invention relates to applications of an ecological protective apparatus for concrete dam tops and dam slopes belonging to the field of dam body protection. The applications herein comprise the following steps: firstly determining a location for disposing a plant pipe based on the size and features of a concrete dam; then preparing a plurality of single-unit plant pipes, opening pores on the pipe wall every 30-40 cm, wherein for horizontal layout of a pipeline, circular pores of5-10 cm pore diameter may be opened, and for longitudinal layout, a recessed cut opening of 5-8 cm may be opened; casting organic soil to a single-unit plant pipe 5; combining single-unit plant pipes which are filled with organic soil to form a plant pipe channel at the places whereat a pipeline needs arrangement; planting or sowing seeds at the openings of the plant pipes which have been installed; greenizing the concrete dam tops and dam slopes through plant growth. The applications of the present invention achieve greening of the dam body, and at the same time do not impose influence on the safety of dam body.

The invention discloses a bursting preventive shell tube structure and a water heater. The bursting preventive shell tube structure comprises a shell, a copper tube in the shell, a tube plate and a vessel head, wherein an opening is formed in one end of the shell; the tube plate is arranged at the opening of the shell; the tube plate is covered with the vessel head; a cavity between the tube plateand the vessel head is divided into a water flowing space and a compensation space by an elastic separating piece; and the copper tube communicates with the water flowing space. The bursting preventive shell tube structure is provided with the compensation space, so that under the low temperature condition, the compensation space can be provided for the increased size formed after water freezes to reduce the risk that the copper tube bursts.

The invention discloses an autoclaved fly ash-lime brick. The autoclaved fly ash-lime brick comprises, by weight, 60-70% of fly ash, 17-22% of stone chips, 12-18% of lime and 1-3% of gypsum. The lime comprises 60-80wt% of active calcium oxide and the fly ash comprises 55-65wt% of silica. The autoclaved fly ash-lime brick has the advantage that through optimization of a raw material ratio, the autoclaved fly ash-lime brick has substantially improved strength and excellent performances of resisting pressure, bending and frost.

The invention relates to a fry temporary rearing system made from PVC pipes and a breeding method thereof, belonging to the technical field of aquaculture. The fry temporary rearing system comprises aframework, a mesh box, anchor ropes, an oxygen-increasing framework and a handle. A layer of oxygen-increasing framework is arranged at the lower part of the framework. The layer of oxygen-increasingframework is connected with the framework through the anchor ropes. The upper end of the mesh box is fixed on the framework through the anchor ropes. The framework and the layer of oxygen-increasingframework are both located in the interior of the mesh box. The framework comprises an upper framework and a lower framework. The layer of oxygen-increasing framework is located at the bottom. The lower framework is located above the layer of oxygen-increasing framework. The upper framework is located on the lower framework. The framework is equipped with the handle. The fry temporary rearing system can effectively reduce damage caused by fry capture and delivery, increase the survival rate and is operated easily and conveniently. The PVC pipes are good in anti-aging performance and excellentin freezing-proof performance. Pipe fittings are connected by PVC glue. The construction method is simple. Installation work efficiency is high. The overall system is low-weighted and easy to carry.

The invention provides a solar water heater with a frozen-blocking prevention function. The solar water heater comprises a support. A cylindrical heat-preservation water tank with the axis in the horizontal direction is arranged on the upper portion of the support; a row of radial circular holes in the horizontal direction is evenly distributed in the lateral lower portion of the heat-preservationwater tank; a row of vacuum heat-collecting pipes are arranged on the support, wherein the upper ends of the vacuum heat-collecting pipes are inserted in the radial circular holes of the heat-preservation water tank in a sealed mode; an upper water nozzle and a lower water nozzle are arranged on the lower portion of the heat-preservation water tank and connected with an upper water pipe and a lower water pipe; upper-section water pipe bodies of the upper water pipe and the lower water pipe are wrapped with heat-preservation material layers; temperature sensors are arranged between the heat-preservation material layers and the water pipe walls and connected with a temperature controller provided with a mains supply output end and a switch output end; and a super-hydrophobic material layeris arranged on at least the inner side wall of a water flow channel in each of the upper water nozzle and the lower water nozzle. The solar water heater is stable in freeze-prevention performance, durable in frozen-blocking prevention effect, high in adaptability to the severe environment, simple in structure and low in cost.

The invention discloses composite ash for roadbed paving, and belongs to the field of road engineering, the composite ash is mainly prepared by mixing the following raw materials by weight: 10-55 parts of magnesium oxide; 8-50 parts of magnesium chloride; 5-12 parts of ferrous sulfate; 10 to 30 parts of slag powder; 20-35 parts of steel slag powder; 5-10 parts of gypsum. The composite ash is usedas a roadbed reinforcing material, the roadbed strength can be remarkably improved, the construction process is not affected by seasons, temperature and other conditions, the adaptability is wide, andgood application and popularization value is achieved.

The invention provides an anti-icing vacuum storage tank. The anti-icing vacuum storage tank comprises a tank body and pipelines. The pipelines are connected to pipe openings of the tank body. Heating rings are arranged at the joints of the pipelines and the pipe openings. By adoption of the anti-icing vacuum storage tank, the heating rings are arranged at the joints of the pipelines and the pipe openings so that the temperature of the pipelines can be maintained, the temperature of the joints of the pipelines can be controlled over 0 degree, and thus the icing phenomenon is effectively avoided.

The present invention relates to an ecological slope protective apparatus for rock-fill dams and dam slopes and applications thereof, belonging to the field of dam slope protection. A plurality of plant pipes described in the present invention are arranged spaced apart on a dam top and a dam slope, wherein the plant pipes are laid out horizontally, the two ends of the plant pipe being in communication via a fine polyvinyl chloride (pvc) pipe, the pvc pipe acting as a water charging pipe at one end of the plant pipe and acting as a water discharging pipe at the other end of the plant pipe; the plant pipe together with the water charging pipe and the discharging pipe constitute a pipe-net system; one side of the pipe wall of the plant pipe is provided with openings, each section of the plant pipe being in direct connection at the places of the openings, the left and right ports of the plant pipe at the rear end of each pipeline being closable via end lids which are provided with small holes thereon, the aperture of the small holes being equal to the pipe diameter of the water charging pipe or the water discharging pipe, one end being in connection with the water charging pipe, the other end being in connection with the water discharging pipe. The protective apparatus of the present invention greenizes dam bodies and does not impose influence upon the safety of the dam bodies.