36results about How to "Good pressure regulation effect" patented technology

The invention relates to a coordinated control method for multistage reactive voltage in an active distribution network. The control method comprises the steps of grading voltage regulation resources in the active distribution network, executing four stages of voltage regulation in sequence from low to high, judging whether the voltage level of the whole network is qualified after each stage of voltage regulation, and when the voltage level of the whole network is qualified, not performing next stage of voltage regulation, wherein the four stages of voltage regulation are respectively first, second, third and fourth ones of a power system realized by using a distributed photovoltaic power supply, reactive power output of a photovoltaic power station, a traditional VQC (Voltage Quality Control) device and active power output of the photovoltaic power station. Compared with the prior art, the control method sufficiently using the scattered voltage regulation resources in the active distribution network has the advantages of effectively reducing the actions of the VQC device, improving the voltage level of the distribution network and the like.

The invention relates to a dynamic voltage-adjustment reactive compensation technology, in particular to a variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method includes the steps of setting a series-parallel connection assembly for a variable electric reactor and a capacitor and connecting the series-parallel connection assembly into a load side inlet; detecting the voltage offset and operation conditions of the outlet end and the power factor of the inlet end of the assembly in real time; dynamically controlling the parameters of the variable electric reactor and the capacitor in series-parallel connection according to the voltage offset and operation conditions of the load side and the power factor on a power grid side, and enabling the voltage on the load side to reach the standard and the power factor on the power grid side to be improved. The variable series-connection reactance dynamic voltage-adjustment reactive compensation device comprises a series-parallel connection unit for the variable electric reactor and the capacitor, a load voltage offset and power grid reactive vacancy detection unit, a dynamic voltage-adjustment and reactive power compensation control unit, a dynamic voltage-adjustment and reactive power compensation execution unit and an element and device protecting unit. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device can be used for controlling low voltage, improving electricity quality, reducing losses, saving energy and improving power supply reliability and electricity utilization rate, and have the advantages of being safe, being environmentally friendly, saving energy and increasing the effect.

The invention provides an automatic decompression device of rubber extruding equipment, belonging to the technical field of rubber equipment. The automatic decompression device comprises an extruding machine barrel, a sealing door, a rotating rod, a first memory resilient sheet, a first heating pipe, magnetic nut blocks, a pressure ball, magnetic slide sheets, a screw rod, a shell, stepping motors, a connector, a bottom groove, a draught fan, a chopping machine, a pull rod, an air door, a second memory spring, a second heating pipe, gears, gear blocks, a fixing rod, a fixing seat, a screw rod, adjusting mechanisms, connecting rods, scraping blocks and a spring, wherein a sealing door is arranged at an opening of the lower end of the extruding machine barrel and is connected with one end of the rotating rod; the other end of the rotating rod is connected with the first memory resilient sheet; the first memory resilient sheet is sleeved by the first heating pipe; the shell is arranged under the sealing door and the magnetic nut blocks are arranged on the outer side of the shell; the magnetic slide sheets are arranged on the inner side of the shell; and the magnetic nut blocks are connected with the screw rod. The automatic decompression device adopts a self-adjustable cleaning structure and has good pressure adjusting performance and long service life; and regenerated rubber equipment can work stably.

The invention relates to a reducing valve in the agriculture water-saving irrigation field and discloses an irrigation multifunctional mass-flow reducing valve. The irrigation multifunctional mass-flow reducing valve comprises a valve body, a support plate, a valve rod, a valve core, a valve cap, a base, an opening-closing valve body, a spring positioning piece, a bolt and a spring. In the working state, when the upstream pressure is instable, under the actions of spring force and water pressure, the valve rod and the valve core can move up and down in the axial direction to regulate the current cross section, then different head losses of localities are caused, and the function of stabilizing the downstream pressure is achieved. According to the irrigation multifunctional mass-flow reducing valve, a throttling port is perpendicular to the water flowing direction, and the pass flow is large; the lowest end of the valve body is provided with the opening-closing valve body, through the adjustment of the opening-closing valve body, the valve core can be closely attached to the wall face of the lower side of the throttling port, and the function of closing the valve is achieved. The irrigation multifunctional mass-flow reducing valve has the advantages that the pass flow is large, the adjusting range is wide, the pressure adjusting effect is good, the assembly is convenient, and the irrigation uniformity can be greatly improved if the irrigation multifunctional mass-flow reducing valve is applied to the agriculture irrigation system; meanwhile, the delicate design of the opening-closing valve body can omit an opening-closing valve body in a pipeline, and the investment is reduced.

The invention provides an optimal configuration of a 10 kV power distribution network parallel reactor and a compensation method of the 10 kV power distribution network parallel reactor. The optimal configuration of the 10 kV power distribution network parallel reactor and the compensation method of the 10 kV power distribution network parallel reactor are used for solving the problem that inductive reactive power optimal allocation of resources of insertion of small hydro to power distribution network and controlling switching of the reactive power compensation. The compensation method of the 10 kV power distribution network parallel reactor comprises the following steps: obtaining a voltage drop reactive decoupling formula by means of a decoupling deduction of the voltage drop formula; ensuring reactive decoupling coefficient according to the line reactance per kilometer and the line voltage reference; ensuring an optimal configured compensation point of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula; ensuring and avoiding the capacity of the 10 kV parallel reactor configuration of the upper limit of the node voltage of a trunk line, and ensuring the capacity of a single unit and the number of configured groups of the 10 kV parallel reactor by a reference of a rule that a voltage regulating effect of reactive compensation equipment of a single group of a transformer substation does not exceed 2.5% of the rated voltage; and monitoring the node voltage of the trunk line including the small hydro in real time, and controlling the switching of the 10 kV parallel reactor according to the voltage drop reactive decoupling formula.

The invention relates to a capillary pressure regulator with stable pressure-regulating performance. The capillary pressure regulator is characterized by comprising an upstream shell, a downstream shell, a baffle, a flat support, a T-shaped pressure-regulating component and a pressure-regulating spring, wherein the upstream shell comprises a first cylindrical section, a conical diffusion section and a second cylindrical section which are sequentially and integrally arranged; the downstream shell comprises a third cylindrical section and a fourth cylindrical section which are integrally arranged; the third cylindrical section is connected with the second cylindrical section; a plurality of gas ports are formed in the circumferential direction of the third cylindrical section at intervals; the baffle comprises a first rounded body and a cylindrical structure; the middle of the first rounded body is provided with a through cylindrical structure and an impermeable central hole; a plurality of water inlet holes which are communicated with the central hole are formed in the circumferential direction of the cylindrical structure; the first rounded body is arranged in the second cylindrical section; the cylindrical structure stretches into the conical diffusion section; the flat support is arranged in the second cylindrical section; the middle of the flat support is provided with a round hole of which the diameter is the same as that of the central hole of the baffle; the T-shaped pressure-regulating component comprises a second rounded body and a cylinder; the cylinder penetrates through the round hole on the flat tray and the central hole on the first rounded hole; and the pressure-regulating spring is sleeved on the cylinder of the T-shaped pressure-regulating component.

Environmentally friendly reclaimed rubber extrusion equipment belongs to the technical field of rubber equipment, including motors, gearboxes, hoppers, feeding sections, plasticizing recovery devices, vent valves, waste recovery devices, connecting pipes, filters, coolers, extrusion device, discharger, tractor and base; a motor, a reduction box and a waste recovery device are installed on the base, the motor is connected to the reduction box, the reduction box is connected to the feeding section, and the feeding section is equipped with The feeding hopper, the right end of the feeding section is connected to the plasticizing recovery device, and there are multiple air release valves on the plasticizing recovery device. A cooler is installed at the right end of the cooler, an extruder is installed at the right end of the cooler, and a discharger is installed at the right end of the extruder; the device adopts a self-regulating cleaning structure, which has good pressure regulation performance, and at the same time, the produced products have good toughness and fracture resistance Good performance.

The invention discloses a pressure adjusting assembly for a natural gas pipeline. The pressure adjusting assembly for the natural gas pipeline comprises a stop valve, a pressure adjustor and a valve port communicating with a front pressure adjusting section and a back pressure adjusting section. A stop valve element of the stop valve is connected with a locking mechanism which is unlocked through gas pressure after pressure adjustment. The stop valve element forms blockage pressure through a stop drive spring. The pressure adjuster is provided with a main valve element driven by a primary self-balancing structure, and the main valve element is only movably arranged on a shell of the pressure adjustor. The lower end of the main valve element is connected with a secondary self-balancing auxiliary valve element assembly. The auxiliary valve element assembly comprises an outer cylinder and an inner cylinder. A leather bag is arranged on the lower end face of the inner cylinder. A T-shaped auxiliary valve element is arranged in the middle of the inner cylinder in a penetrating manner. The upper end of the T-shaped auxiliary valve element abuts against the main valve element in a connected manner. The T-shaped auxiliary valve element forms a secondary self-balancing structure through the leather bag and a compression spring. The pressure adjusting assembly for the natural gas pipeline has the beneficial effects that the pressure adjustor forms the double self-balancing pressure adjusting structures which are mutually superposed; and the stop valve is of a purely mechanical structure, and therefore potential safety hazards caused by sparks are avoided.

The invention relates to the technical field of bulldozers, in particular to an electric-hydraulic cooperative control type speed changing system for a bulldozer. The electric-hydraulic cooperative control type speed changing system for the bulldozer comprises a hydraulic control handle. A button used for controlling a speed gear electromagnetic valve to be powered on or powered off is arranged on the hydraulic control handle, and by powering on or powering off the speed gear electromagnetic valve, pilot oil is made to enter different oil ports of a speed gear control device, a valve element of the speed gear control device moves to the corresponding gear under the effect of oil pressure, and thus speed gear switching is achieved; and a valve element of a direction gear control device is controlled to move to the corresponding position by controlling oil entering the direction gear control device through the hydraulic control handle, and thus direction gear switching is achieved. According to the electric-hydraulic cooperative control type speed changing system for the bulldozer, the advantages of simple structure and good pressure regulating performance of mechanical speed valves and direction valves are reserved, impact in the gear shifting process of the whole bulldozer is reduced through an operating way based on cooperation of electric control and hydraulic control, and the operating comfort is improved; and meanwhile, cost is greatly reduced, and the market competitiveness of products is improved.

The embodiment of the invention provides a control method and device of a two-way electromagnetic force control valve for common rail flow control. The method comprises the steps that real-time commonrail oil pressure of a common rail system is obtained; common rail differential pressure is obtained according to the real-time common rail oil pressure of the common rail system and target oil pressure of the common rail system; the duty ratio of a direction signal, a driving signal and a pulse width modulation signal is calculated according to the common rail differential pressure; and the corresponding direction signal, driving signal and pulse width modulation signal are output to a bidirectional current controller according to the electrical level state of the direction signal, the electrical level state of the driving signal and the duty ratio of the pulse width modulation signal, and are used for generating a corresponding driving current in the bidirectional current controller, sothat a sliding valve core of the two-way electromagnetic force control valve is driven by the driving current to slide. The control method and device of the two-way electromagnetic force control valve for the common rail flow control can achieve fast and accurate adjustment of the common rail pressure of the high pressure common rail oil supply system.