34results about How to "Realize secondary regulation" patented technology

The invention discloses a monitor fixing base. The monitor fixing base comprises a bottom board and baffles, the baffles are arranged at the two ends of the bottom board in an inclined mode, and the upper end portion of the bottom board is provided with a vertically and downwards extending dovetail groove. The monitor fixing base further comprises clamps and an installation board parallel to the bottom board, the side face of the installation board is provided with a protrusion, the protrusion is arranged inside the dovetail groove in a sliding mode, and the clamps penetrate through the end portions of the two baffles. When a monitor is replaced or maintained, maintenance or replacement is carried out by taking the installation board out of the dovetail groove without replacing a fixing support, so that the fixing support is recycled, and the cost and workloads for installation and maintenance are reduced.

The invention discloses a novel special lifting hook for a crane. The novel special lifting hook comprises a lifting box and a lifting hook body, a cavity is formed in the lifting box, a wire hole communicated with the cavity is formed at the upper end of the lifting box, and a through hole communicated with the cavity is formed at the lower end of the lifting box. According to the novel special lifting hook for the crane, a take-up wheel is arranged in the cavity of the lifting box and connected with the output end of a motor fixed to the side wall of the lifting box through a rotating shaft,and due to the design, after an operator of the crane descends the lifting hook to the position above goods at a time, a carrying person below controls a motor to be started through an adjusting switch; and secondary adjustment of the height of the lifting hook is achieved, the proper height is formed between goods and the lifting hook, and the carrying person can conveniently fix the goods to the lifting hook.

The invention provides a phenolphthalein polyarylether ketone foam material and a preparation method thereof and belongs to the technical field of processing of high polymer materials. The method comprises the following steps: performing mold pressing on phenolphthalein polyarylether ketone on a vulcanizing press so as to obtain a cross-linked phenolphthalein polyarylether ketone template; swelling and permeating the cross-linked phenolphthalein polyarylether ketone template in supercritical CO2, performing rapid pressure relief, taking out foam from a high-pressure autoclave, cooling to room temperature, thereby obtaining the phenolphthalein polyarylether ketone foam material, wherein the phenolphthalein polyarylether ketone foam material is amorphous. The invention further provides a phenolphthalein polyarylether ketone foam material. The polyarylether ketone foam material disclosed by the invention has the advantages that the carbon dioxide solubility is high, the foaming ratio is high, and foam bubble growth is not limited by a crystalline region; the foam structure can be further controlled by controlling the degree of crosslinking.

The present invention realizes the real-time monitoring of the bubble size through a dynamic observation and control system of the air-floating micro-bubbles by using the principle of optical barrier particle counting, and overcomes the problem of time lag in the traditional measurement of the bubble size; The secondary control of size solves the limitation of too small control range; the present invention realizes real-time and accurate measurement of bubbles through a dynamic observation and control system of air flotation micro-bubbles, expands the range of bubble size adjustment, and improves air Float handling flexibility.

The invention provides a system and a process for pulverized coal injection of a blast furnace. The system comprises a plurality of parallel injection tanks, fluidization tanks, injection branch pipes, coal injection valves, an injection main pipe, a charging pipeline, a charging valve, a pressure stabilizing pipeline, a pressure stabilizing valve, a gas supplementing pipeline, a gas supplementing regulating valve, a pulverized coal flow regulating valve and a pulverized coal flow meter, wherein one fluidization tank is arranged at the bottom of each injection tank, one injection branch pipe is connected with an outlet of each injection tank, one coal injection valve is arranged on each injection branch pipe, the charging pipeline and the pressure stabilizing pipeline are connected with each injection tank, the injection main pipe is vertically arranged, the pulverized coal flow regulating valve and the pulverized coal flow meter are arranged on the injection main pipe from bottom to top, the gas supplementing pipeline is connected to the bottom end of the injection main pipe, and the gas supplementing regulating valve is arranged on the injection main pipe and below the joints of the injection branch pipes and the injection main pipe. By the aid of the system and the process, pulverized coal can be uniformly and stably injected, injection quantity is accurately controlled, pulverized coal dense phase transportation technology can be realized, gas consumption is low, and pipeline abrasion is less.

The invention discloses a method and system for coordination control of isolated microgrid frequency based on a temperature control load, while ensuring the comfort level of users, uses a synergistic effect of an improved variable participation degree frequency modulation method for the temperature control load and an energy storage device frequency modulation method to realize secondary adjustment of microgrid system frequency, can give full play to a frequency modulation capability of the temperature control load, and can effectively lower a requirement for the capacity of the energy storage device, thereby well improving a microgrid frequency control effect. The method includes the steps of: S1. performing frequency modulation on a microgrid based on an improved user participation degree coefficient K<AC>, K<AC>=on%P<N> / (T<+>-T<->)*k<f>, wherein k<f> is an original user participation degree coefficient, on% is the proportion of the temperature control load in an on state under a stable running state, P<N> is rated power of the temperature control load, and T<+> and T<-> are set temperature limits for switching-on and switching-off of the temperature control load; and S2. performing frequency modulation on the microgrid again based on the energy storage device.

The invention belongs to the technical field of thermal control of an environment of a sealed cabin of a space aircraft, and relates to an independent temperature and humidity control system for a sealed cabin of a space aircraft and an implementation method. By means of the design of the independent air temperature and humidity control system structure and the implementation method, decoupling control on the temperature and the humidity of air in the sealed cabin of the space aircraft is achieved, the defect that control requirements of double targets of the temperature and the humidity of the air are difficult to meet by means of an integrated temperature and humidity control system is overcome, and the detailed requirement for controlling the temperature and the humidity of the sealed cabin of a future space aircraft is met.

The invention discloses a heat storage adjusting system based on combined cooling heating and power and an adjustment method thereof, and belongs to the technical field of heat exchange management. The adjusting system comprises a PLC controller module, an upper computer, an after-burning afterheat boiler, a shunting adjustment module, a heat storage box set, an electric heating module, an afterheat dispatching module and a user load bus. The adjustment method comprises the following steps: (1) system initialization parameters are set; (2) the system start and parameters are set; (3) the outer ring bus energy supply is adjusted; a winter mode is operated in winter; a summer mode is operated in summer; and the afterheat dispatching module is adjusted according to difference of the operation modes to maintain the temperature of the user load bus constant; (4) the inner ring load energy supply is adjusted; (5) the afterheat recovery energy is adjusted; (6) the commercial power heat storage energy is adjusted; and (7) the reception of stop signals due to fault generation of the system or season change is judged; if so, the system stops working; and if not, the step (3) is returned for operation.