35results about How to "Avoid direct heating" patented technology

The invention relates to an improved test device for testing an oxidizing solid. The improved test device is provided with a test system and a measurement system and is characterized in that the test system and the measurement system are positioned at two ends of a lever system and are connected with each other through the lever system; the test system comprises a bracket A, a limiting block, a tray A, a heat isolation plate, a wiring post and a resistance wire; the lever system comprises a lever, a wire A, a wire B, an electric brush, a current collection ring, a bracket B and a power supply; the measurement system comprises a balance weight, a tray B, a level adjuster and a balancer. Compared with the prior art, the improved test device disclosed by the invention has the advantages that the test system can be separated from the measurement system, the measurement precision is improved according to an equal arm lever principle, and damage of heat and dust on the balancer during combustion can be eliminated.

A crawler united paver for rolling asphalt concrete is prepared as setting infrared heating unit and insulated hopper of asphalt mixed material at host head; setting alignment monitoring unit at connection point of infrared heating unit and host; setting shock-ironing plate and frame die at host back, riding transition material sub hopper on frame die and setting scraper, scraper lifting up and lowering down unit and receiver of laser leveling unit at back of transition material sub hopper.

The invention provides a pipe, a preparation method of the pipe and a concrete machine. The pipe includes: a pipe body; a wear-resistant coating formed on the inner wall of the pipe body by thermal spraying; wherein the wear-resistant coating includes a ceramic material coating. The wear-resistant coating can prevent the material from directly impacting and wearing the pipe body, thereby preventing the pipe body from being abraded by the material and prolonging the service life of the pipe body. weight and production costs. The wear-resistant coating is an integral structure formed by thermal spraying. On the one hand, the structural stability of the integral structure is strong, and there is no structural connection section, which can effectively avoid structural damage or shedding. On the other hand, thermal spraying technology has the ability to form The advantages of high efficiency and strong stability can reduce the production cost of the pipeline and further improve the structural stability of the wear-resistant coating.

The invention relates to an electrically-heated energy-storage heat exchanger and a heat storing and releasing method thereof and solves the problems of non-uniform energy distribution and low energy utilization rate in the heat exchange process of an existing electrically-heated phase change heat storage and exchange device. The electrically-heated energy-storage heat exchanger comprises a tank-shaped shell and an electric heating pipe; the shell is filled with a heat storage medium. The electrically-heated energy-storage heat exchanger is characterized in that a heat exchange pipeline is also arranged in the shell and is vertically folded back in a vertical plane to be coiled in an S-shaped manner; the heat exchange pipeline is folded to and fro in a horizontal plane to be arranged in an S-shaped manner or spirally arranged inside the shell around a circle center; an opening is formed in the upper end of the shell, and a detachable cover plate is arranged at the upper end of the shell; an inlet and an outlet of the heat exchange pipeline penetrate out of the shell from the cover plate; the electric heating pipe extends into the inside of the shell downwards from the cover plate. The electrically-heated energy-storage heat exchanger provided by the invention performs uniform heat exchange on the heat storage medium with poor mobility, so that the heat utilization efficiency is improved.

The invention discloses a control method for a lowest-water-level-changing double-water-tank solar water heating system. The control method includes the following steps that multiple parameters of the double-water-tank solar water heating system in all time periods in n days before a forecasting day are collected; calculation is conducted to obtain the water use amounts of all the time periods in the n days before the forecasting day by subtracting the water flow of a water return main pipe in the corresponding time periods from the water flow of a water supply main pipe of all the time periods in the n days before the forecasting day; with the combination of a statistical method of t distribution in applied mathematical statistics and under the set confidence coefficient, the following formulas are adopted for calculating the forecasting values of the water use amounts of all the time periods in the forecasting day; the water level set value of a gradient temperature control heat supply water tank in the forecasting day is calculated; heat collection circulation is conducted; a heat collection water tank supplements water to the heat supply water tank; water supplementation of the heat collection water tank is conducted; the heat collection water tank supplements water to the heat supply water tank; and gradient temperature control water supplementation and overheat protection are conducted. By the adoption of the method, the starting time of an auxiliary heat source is shortened, and it is expected that the energy is saved by 20% or higher than that of a single-water-tank solar water heating system.