109results about How to "High pressure regulation accuracy" patented technology

The invention discloses an electro-hydraulic combined braking system with the electric power function and applicable to a regenerative braking automobile. A braking pedal pushes a piston ejector rod of a braking master cylinder to move through a pedal push rod, and an electric braking power device assists in pushing the ejector rod of the braking master cylinder to move. The structure of combining a ball screw pair with a reacting disc is adopted for the electric braking power device, and therefore the torque output by rotation of a motor can be converted into linear movement of an output rod. In the braking process, the movement of the piston ejector rod of the braking master cylinder can be braked by controlling rotation of the motor. According to received collection signals of all sensors on the automobile, an electronic control unit controls a hydraulic control system and the electric braking power device and selects one braking mode, and the braking modes include the electric power mode, the regenerative braking mode, and the driving braking mode. The electro-hydraulic combined braking system has the advantages of having the electric braking power and driving braking functions, and being high in reliability, low in manufacturing cost, small in pressure fluctuation and high in pressure adjusting accuracy.

The invention discloses an accumulator system capable of automatically regulating inflation pressure, which comprises an accumulator, wherein the outlet of an air cavity of the accumulator is connected with the outlet of a supercharger; the inlet of the supercharger is connected with the outlet of a nitrogen cylinder through an inflation and detection device, and a decompression loop and the supercharger are parallelly arranged; the inflation pressure can change along with the set operation pressure of a hydraulic system so as to automatically accordingly change in proportion, and the pressure charging and decompression actions both adopt a program control box to carry out automatic control on an electromagnetic valve; and the whole process of inflation pressure in the air cavity of the accumulator is changed so as to not need manual intervention, the adjustable pressure range of an accumulator group is wide, the pressure regulation accuracy is relatively higher, and the self-regulation inflation pressure accumulator is energy-saving and environment-friendly.

The invention discloses a pressure-bearing underwater mining analog simulation testing device. The device comprises a supporting frame, a coal bed and a rock stratum, wherein the coal bed and the rock stratum are erected on the supporting frame, and a confined aquifer is arranged in the rock stratum and comprises ten small water bags. For the first to fifth small water bags, each water inlet (7) is formed in the middle of the corresponding left side wall (5) and located at the position close to the corresponding front side wall (3), and each water outlet (8) is formed in the lower portion of the corresponding right side wall (6) and located at the position close to the corresponding rear side wall (4). For the sixth to tenth small water bags, each water inlet (7) is formed in the lower portion of the corresponding left side wall (5) and located at the position close to the corresponding front side wall (3). By the adoption of the pressure-bearing underwater mining aquifer analog simulation testing device and method, approximate simulation of confined water can be achieved during coal mining when an aquifer exists in overlying rock.

The invention discloses a piston type axial flow pressure regulator which mainly comprises an axial flow regulation valve, a pressure regulation controller and a group of signal tubes connected with the pressure regulation controller and has the remarkable structure characteristics that separate flow passage, throttling and depressurizing functional component and guide mechanism functional component are designed in the axial flow regulation valve according to the separation principle. A cylinder sleeve is embedded between a valve seat and a valve sleeve to form an annular flow channel, and a piston is matched in the cylinder sleeve in a sliding manner to carry out pressure regulation and stabilization operation, so that the piston is guaranteed to be applied by the pushing and pulling action force in the axial direction only when sliding in the cylinder sleeve, the defects of large flow resistance, large vibration and high noise as the a turbulent flow is easily generated due to a meander flow passage with lower inlet and upper outlet of the traditional regulation valve are well overcome, and the technical effects of further improving the pressure regulation accuracy and pressure regulation stability are very obvious. The piston type axial flow pressure regulator has the outstanding advantages of simple and rapid structure, liability in production, low manufacturing cost, high pressure regulation accuracy, good stability of output pressure, safety and reliability in running and long service life and has very good popularization and application prospect.

The invention discloses an energy-saving and consumption-reducing hydraulic system with multistage pressure control for a large hydraulic machine, which comprises a main cylinder, a plurality of groups of side cylinders and a plurality of oil pump motor sets, wherein inserts are connected to individual upper cavity oil paths or merged upper cavity oil paths at the oil inlets of the main cylinder and the side cylinders; and the inlet ends of the inserts are connected with oil supply pipelines of the oil pump motor sets. The energy-saving and consumption-reducing hydraulic system with multistage pressure control for a large hydraulic machine is applied to main tonnage multi-section regulation combination of the large hydraulic machine, and can be divided into multiple sections to enable different pressure-regulating ranges so as to improve pressure-regulating precision. Due to the adoption of the energy-saving and consumption-reducing hydraulic system with multistage pressure control for a large hydraulic machine, system leakage factors are reduced and energy consumption of a motor during idling is avoided. Full-power work of the motor is fully utilized so that maximum working efficiency is reached.

The invention relates to a large-caliber high-pressure pressure regulating valve for a pneumatic test device, and belongs to the technical field of valves. The large-caliber high-pressure pressure regulating valve for the pneumatic test device comprises a gas inlet (1), a gas outlet (2), a valve body (3), a valve plug (4), a valve seat (5), an upper cover (6), a lower cover (7), a balance air cylinder (8), a balance gas pipe (9), an oil cylinder supporting frame (10) and a driving oil cylinder (11), wherein the size of a gas flow channel between the valve plug (4) and the valve seat (5) is changed through vertical movement of the valve plug (4), and pressure regulation and pressure stabilization are achieved. According to the large-caliber high-pressure pressure regulating valve for the pneumatic test device, due to the facts that the balance air cylinder (8) is arranged in the valve body (3), and is connected with the gas inlet (1) through the balance gas pipe (9), and high-pressure gas before the valve serves as gas for balancing the large-caliber high-pressure pressure regulating valve for the pneumatic test device, driving force of the large-caliber high-pressure pressure regulating valve can be greatly reduced, regulation precision is improved, rapid pressure stabilization and rapid pressure adjustment are achieved, the range of pressure regulation is wide, and the full-opening time and the full-closing time are short.

The invention relates to a hydraulic oil supply unit which comprises an oil flow regulating device, an oil pressure regulating device, a control unit (4) and an oil supply control oil way (10), wherein the oil supply control oil way (10) is provided with a flow detection device (2); one of the oil flow regulating device and the oil pressure regulating device is arranged on the oil supply control oil way (10), and the other one is used for controlling a hydraulic pump; the oil flow regulating device and the oil pressure regulating device are respectively and electrically connected with the control unit (4), so as to regulate the oil flow (Qs) and the oil pressure (Ps) of the hydraulic oil supply unit through the control of the control unit; and the flow detection device (2) is electrically connected with the control unit. In addition, the invention further provides an oil supply control method and a hydraulic power unit of the hydraulic oil supply unit. In the aspects of constant pressure oil supply control, constant-current source oil supply control and the like, the hydraulic oil supply unit, the hydraulic power unit and the oil supply control method have the advantages of higher control flexibility, wider applicability and better energy saving, and the control precision is obviously increased.

The invention relates to a precision voltage regulation and stabilization device, which can meet the requirements of precision voltage regulation and stabilization for a high-voltage power supply. The invention is characterized in that the precision voltage regulation and stabilization device comprises a low-voltage compensating regulation and controlling circuit, a sampling circuit, a comparator, a controlling circuit, an isolating driving circuit, a regulator circuit, an electronic switch, a D / A electric circuit and a CPU electric circuit; after a CPU outputs a digital voltage signal, the D / A electric circuit transmits the voltage signal converted by the D / A electric circuit to the comparator, the comparator compares the transmitted reference voltage and the sampled voltage, the electronic switch is turned off after the transmitted reference voltage and the sampled voltage pass through the controlling circuit and the isolating circuit, and the rectified 100Hz voltage flows when the voltage of the sampling end is raised to the reference voltage. The invention has the advantages that compared with the old type mechanical voltage regulator, the precision voltage regulation and stabilization device has small volume, light weight, high voltage regulation precision, and continues and adjustable output voltage, can be directly connected with a monolithic processor to realize remote voltage-stabilized power, and has certain economic benefit.

The invention discloses a pressure regulator with an excessive flow auto-closing function by setting the maximum flow. The pressure regulator comprises a pressure regulation actuating mechanism, a pressure regulation transmission mechanism and a pilot valve, wherein a main valve core is mounted on a main valve rod; an excessive flow closing valve core forms an associated secondary throttling structure of a main throttling port and an auxiliary throttling port; the pilot valve can regulate and manipulate a throttle valve port to control the airflow in a shunting air channel according to the forward pressure and backward pressure fluctuation signals; a main film elastic assembly of the pressure regulation transmission mechanism drives the main valve rod to shift, so as to regulate the correlation opening degree of the main and the auxiliary throttling ports and carry out pressure regulation and pressure stabilization; and the maximum flow of the pressure regulator can be conveniently set, and when excessive flow exceptions such as (sudden pipe cracking and leakage accidents) occur, a gas source can be quickly closed for safety protection. The pressure regulator has the advantages of novel design, reasonable structure, convenience for regulation and setting operation, high pressure regulation accuracy, good pressure stability, strong excessive flow safety protection performance, and excellent popularization and application prospect.

The invention provides a pressure regulating valve which comprises a valve body, a fluid flow channel, a cylindrical flow guide screen sleeve, a piston and a piston driving mechanism, wherein the cylindrical flow guide screen sleeve is arranged in the fluid flow channel. A plurality of through holes are formed in a through-flow portion of the flow guide screen sleeve and axially extend along the flow guide screen sleeve, fluid flowing from an inlet of the pressure regulating valve flows to a downstream side through the through holes and flows out of the valve body through an outlet of the pressure regulating valve, the piston driving mechanism is used for driving the piston to axially move along the valve body, the piston can axially move along the flow guide screen sleeve, so that the piston is jointed with the inner wall of the flow guide screen sleeve, the piston axially moves along the valve body under the driving action of the piston driving mechanism, the jointed position of the piston and the inner wall of the flow guide screen sleeve is controlled, the area of the through holes for flowing of the fluid in the flow guide screen sleeve is controlled, and pressure is regulated. On the premise of wide pressure regulating range, the pressure regulating valve is small in size, simple in structure and high in accuracy, and the influence of the driving mechanism on flow of the pressure regulating valve is minimized.

The invention relates to a reversible adjustment dynamic voltage adjuster. The reversible adjustment dynamic voltage adjuster comprises a DSP control circuit, two PWM converters connected in series, and a sine wave filter which is in an inversion state and composed of inductors and capacitors. One end of an input voltage passes the secondary side of a series compensation transformer and then is output to a load through the sine wave filter, output of the first PWM converter is connected with the two ends of the primary side of the series compensation transformer, and output of the second PWM converter is connected with the front end of the load; An energy storage flat wave capacitor is connected between the two converters connected in series, the DSP control circuit acquires input voltage instantaneous values and input voltage phase signals, the DSP control circuit outputs control signals to the two PWM converters, and the working states of the two PWM converters are adjusted. Through two-way adjustment of energy, interference of fall and rise of network voltages in power consumers can be quickly restrained, and therefore the power quality of a power distribution system is improved.

The invention relates to an air supply device for a liquefied petroleum gas moped, which comprises an air pipeline and a fuel valve arranged on the air pipe, wherein the fuel valve comprises a valve seat, a valve cap, an air filling valve rod, an air inlet regulating arm, a locking nut, a rubber membrane and a torsional spring; the valve seat is fixedly connected with the air pipeline, and the valve seat and the air pipeline are integrated by one-step forming; a central through hole, an inlet hole and a fine-adjustment hole are formed on the valve seat; the valve cap is fixed on the valve seat through a bolt; the air inlet regulating arm is fixed to the upper part of the air filling valve rod through the locking nut; the torsional spring is sleeved on the air filling valve rod; a wire drawing limiting stopper is fixed to the lower part of the front end of the air pipeline, and a supercharger is arranged at the rear of the air pipeline; and the supercharger is communicated with the air pipeline through an air pipe. Compared with the prior art, the air supply device has the advantages of compact structure, complete functions, stable function, high pressure regulating accuracy and the like.

The invention discloses a self-operated pressure regulator which can eliminate membrane aging and widen the application range of a valve. The self-operated pressure regulator is characterized by comprising an upstream pressure tapping pipe (1), a control valve (2), a director (3), a regulating valve (4), a throttling valve (5), a downstream pressure tapping pipe (6) and a downstream pressure tapping point (7), one end of the upstream pressure tapping pipe (1) is connected with the control valve (2), the other end of the upstream pressure tapping pipe (1) is connected with the front end of the director (3), the regulating valve (4) is connected with the upper end of the director (3), the rear end of the director (3) is connected with one end of the downstream pressure tapping pipe (6) through the throttling valve (5), and the other end of the downstream pressure tapping pipe (6) is connected with the downstream pressure tapping point (7).

The invention discloses a control system and method for vehicle pedal sense feedback based on a decoupling brake system. A brake pedal is connected with a brake master cylinder, the brake master cylinder is connected with an oil cup, a pedal simulator and a hydraulic adjustment unit, the hydraulic adjustment unit is connected with the oil cup, the hydraulic adjustment unit is connected to a brakewheel cylinder, the brake pedal is provided with a pedal displacement sensor, a brake control unit is connected with the pedal displacement sensor, a vehicle control unit, the hydraulic adjustment unit and the pedal simulator, and the brake control unit controls the pedal simulator to make a pedal sense feedback action, and controls the hydraulic adjustment unit to work in a conventional decoupling brake mode, an anti-collision decoupling brake mode or an ABS decoupling brake mode. The system performs pedal sense feedback under certain working conditions through interaction of driver foot stepping brake pedal and the pedal simulator, and maximizes recovery of braking energy; when there is a risk of collision, bumping deep pedal stepping feeling is fed back, potential danger is reminded, and the brake pressure is adjusted to avoid the risk of the collision.

The invention provides a pressure regulating valve. The pressure regulating valve comprises a valve body, a rectifier cover, a flow guide screen sleeve and a piston. The valve body is provided with an inlet and an outlet. The rectifier cover is arranged close to the inlet of the valve body and is suitable for guiding influent fluid in a mode of not interfering the fluid flowing into the valve body virtually. A through-flow part of the flow guide screen sleeve is provided with a plurality of through holes extending in the axial direction of the flow guide screen sleeve. The fluid flowing into the valve body from the inlet flows to the downstream side through the through holes and flows out of the valve body from the outlet. The piston can move in the axial direction of the flow guide screen sleeve so as to be jointed with the inner wall of the flow guide screen sleeve, the total area of the through holes through which the fluid flows in the flow guide screen sleeve is controlled by controlling the jointing position of the piston and the inner wall of the flow guide screen sleeve, and therefore the pressure regulating function is achieved. The pressure regulating valve can greatly improve flow and enable the pressure regulating range to be large, and is high in pressure regulating accuracy and low in noise.

The invention discloses a coil of a compound voltage compensation autotransformer. The autotransformer comprises an A-phase coil, a B-phase coil and a C-phase coil which are connected with three-phase alternating current respectively, multiple primary taps, multiple secondary taps and multiple neutral zero taps are arranged at same positions of the three coils, one group of primary taps in the three coils is connected with an input alternating power supply, one group of secondary taps in the three coils is connected with an output line, and one group of neutral zero taps in the three coils are connected with one other. The coils are made of polyimide enamelled round copper wires, and a silicon steel core is arranged in each coil. The coil of the autotransformer is provided with the primary taps, the secondary taps and the neutral zero taps, non-polar voltage regulating output of voltage can be obtained by different combinations, and voltage regulating range is widened while voltage regulating precision is improved; the coil can be used as voltage rising or voltage dropping equipment by adopting different connection modes.

The invention relates to a safety throttle valve comprising a valve body, a taper spool and a slide spool. The valve body is internally provided with a first cavity and a second cavity. The taper spool is arranged inside the first cavity. The slide spool is disposed inside the second cavity. A first spring is disposed between the taper spool and the valve body. The valve body is provided with a first radial hole. The slide spool is internally axially provided with a third cavity and a fourth cavity. The slide spool is provided with a second radial hole and a third radial hole. The second radial hole is communicated with the third cavity. The third radial hole is communicated with the fourth cavity. A damping hole is provided between the third cavity and the fourth cavity. A second spring is disposed inside the second cavity. The first radial hole is connected with an opening T connected with an oil tank. The valve body is provided with an oblique hole; one end of the oblique hole is communicated with the first cavity, and the other end of the oblique hole is communicated with the opening T. The safety throttle valve as functional as a universal safety valve and a universal throttle valve is compact in structure, requires only one mounting hole, is convenient to mount, has small pressure regulation error, is high in pressure regulation precision and allows stable flow regulation.

The invention discloses a self-pressure-loading type pressure regulator. The self-pressure-loading type pressure regulator is mainly composed of a main pressure regulating valve and a pressure regulating controller, wherein the regulating controller is of an integrated structure formed by connecting a pilot valve and a pressure regulating valve. The self-pressure-loading type pressure regulator is structurally characterized in that combined pressure regulating and pressure stabilizing structures are assembled in the pilot valve and the pressure regulating valve respectively, wherein each combined pressure regulating and pressure stabilizing structure is formed by connecting a pilot throttling valve clack and a pressure regulating throttling valve clack in series and used for carrying out secondary throttling and dual switching-off on pressure regulating signals; after secondary throttling pressure regulating and pressure stabilizing are carried out through the pressure regulating controller, stable pressure regulating signals are input into the main pressure regulating valve for pressure regulating and pressure stabilizing work, and then the purposes of automatically regulating output gas pressure and making the output gas pressure tend to be stable can be achieved. Trials show that the self-pressure-loading type pressure regulator indeed has the outstanding advantages of being simple in structure, reasonable in design, low in production and manufacturing cost, convenient to install and use, high in pressure regulating precision, good in output gas pressure stability, high in switching-off sealing property, safe and reliable in operation and long in service life, and has excellent application and popularization prospects in the gas delivery industry.

The invention discloses a cutter head structure of an ultrathin glass transverse-cutting machine. The cutter head structure comprises a cutter box and a cutter head assembly installed at the end of the cutter box, the cutter box comprises a cutter box body, the top of the cutter box is sealed, a guide rod and a nut disk are arranged in the cutter box, the top end of the guide rod is located in the top end of the cutter box, the bottom end of the guide rod stretches out of the cutter box and is fixedly connected to a tappet by a locating pin, a middle-lower part of the guide rod fits to the nut disk by screw threads, the nut disk is connected to a cylindrical spiral spring surrounding the guide rod, the bottom end of the tappet is connected to a lug, the bottom end of the lug is provided with a cutter head clamp by a rotation member, the cutter head structure also comprises a guide wheel and a connection plate, the connection plate is located at the bottom end of the cutter box, the guide wheel is installed on the connection plate by a connection rod assembly, the connection rod assembly is provided with a tension spring, the cutter head structure also comprises a cylinder, and the cutter box is installed on a power-output shaft end of the cylinder. Through use of the spring and the tappet, pressure stepless-adjustment of the cutting machine is realized. Through tension spring action on the guide wheel, the guide wheel-produced impact on ultrathin glass is reduced.

The invention provides an automotive CNG pressure reducer with a novel piston type pressure reducing mechanism. The automotive CNG pressure reducer with the novel piston type pressure reducing mechanism comprises a pressure reducer main body; the bottom of the pressure reducer main body is provided with a high-pressure magnetic valve assembly, the side section of the pressure reducer main body is provided with a high-pressure inlet seat assembly and a piston type pressure reducing mechanism assembly, the high-pressure inlet seat assembly is communicated with the high-pressure magnetic valve assembly, and the high-pressure magnetic valve assembly is communicated with the piston type pressure reducing mechanism assembly; a balance valve assembly and a two-level diaphragm-type pressure reducing mechanism assembly are arranged in the pressure reducer main body, the two-level diaphragm-type pressure reducing mechanism assembly is communicated with the piston type pressure reducing mechanism assembly, and the balance valve assembly is connected with the two-level diaphragm-type pressure reducing mechanism assembly.

The invention provides an aerostat pod landing buffer device and a landing method. The aerostat pod landing buffer device comprises a frame assembly, a locking assembly, undercarriage assemblies and an air bag assembly, the frame assembly is arranged in the pod in a sliding mode through a guide rail sliding assembly, and the undercarriage assemblies are arranged on at least two opposite side faces of the frame assembly; the lower end of each undercarriage assembly is elastically connected with one airbag assembly; the locking assembly is used for locking the relative position of the pod and the frame assembly. Compared with the prior art, the aerostat pod landing buffering device has the advantages of being simple in configuration, reliable in operation, capable of being repeatedly used, low in cost, capable of being quickly disassembled and assembled, convenient to achieve and the like.

The present invention relates to a new type of regulator valve pilot, comprising: a lower housing, a locking spring, a shutter spring, a shutter spring seat, an obturator plug, a moving seat, a middle housing, a membrane, a lower double spring seat, an upper housing, Large adjustment spring, small adjustment spring, upper double spring seat, guide nut, adjustment bolt, connecting rod. Its characteristics are: the lower shell, the middle shell and the upper shell are fixed with screws, and two membranes divide it into three cavities; the lower shell is equipped with a locking spring, a shutter spring, a shutter spring seat and an obturator plug; The rod is installed on the middle housing; the upper housing is equipped with double spring seats, adjusting springs, guide nuts and adjusting bolts. The beneficial effect is: when the small regulating spring works, the pressure value is small, so that the downstream pressure rises slowly. When it is compressed with the large regulating spring at the same time, because there is already a certain pressure downstream, the pressure will continue to rise steadily until it reaches the working pressure, which can reduce the gas pressure. Impact on downstream equipment, improve pressure regulation accuracy, and ensure stable working pressure.

The invention discloses a high-precision quick response pilot valve which comprises a valve body, a pressure regulating valve port, a pressure regulating diaphragm assembly, and a damping diaphragm assembly. In the invention, the valve body is internally provided with a diversion passageway formed consisting of a valve cavity and a pressure regulating air passage, wherein the valve cavity is communicated with a forward press air flow importing interface, and the pressure regulating air passage is communicated with a pressure regulating inductive interface; a pressure regulating valve core and a damping valve core can displace with the pressure fluctuation of a main pipeline to form a damping variable type pressure regulating structure; and the damping variable type pressure regulating structure can quickly collect the pressure fluctuation inside a main inductive gas transmission pipeline and timely transmit a pressure regulating signal to a pressure regulator, which has remarkable effect on improving pressure regulating speed and pressure regulating precision. The high precision quick response pilot valve is especially suitable for matching to be installed with an indirect type pressure regulator for using, and can be widely applied to the gas transmission pipelines with mass medium-high pressure flux and large transient variation range for pressure regulating operation and pressure stabilizing operation. The invention has the advantages of quick pressure regulating response speed, high pressure regulating precision, good pressure regulating stability, and excellent market application prospect.

The invention relates to a pressure regulating mechanism, a cover body and a pressure cooking utensil. The pressure regulating mechanism comprises a bracket, a pressure regulating part and a fitting piece, and the pressure regulating part is arranged between the fitting piece and the pressure regulating valve; the fitting piece can perform reciprocating motion in the first direction relative to the support, the fitting piece and the pressure regulating part are in rolling friction fit, the pressure regulating part can move in a second direction intersecting with a first direction relative to the bracket under the action of the fitting piece and is linked with the pressure regulating part to move in the second direction relative to the bracket. The fitting piece and the pressure regulatingpart are in rolling friction fit, and the friction between the fitting piece and the pressure regulating part is reduced; due to the fact that the friction is relatively small, the sensitivity is high, and then the pressure regulating precision of a pressure regulating mechanism is high.

The invention discloses a filter decompression valve, which comprises a valve body, the left and right sides of the valve body are respectively provided with a high-pressure inlet and a low-pressure outlet; a pressure regulating assembly: the pressure regulating assembly is arranged at one end of the valve body , the valve body and the pressure regulating assembly are separated into a diaphragm chamber and a valve core chamber by a diaphragm assembly, and the valve core in the valve core chamber presses against the diaphragm assembly in the diaphragm chamber to realize the diaphragm Opening and closing connection between the film cavity and the valve core cavity; the diaphragm assembly is provided with a groove at the connection with the valve core, and an air flow is provided between the valve core and the inner peripheral surface of the groove. Through the gap, a seal is provided between the valve core and the diaphragm seat. The air-tight structure of the pressure reducing valve can ensure the airtightness of the pressure reducing valve, and at the same time, the pressure can be reset accurately. Widely used in various pneumatic systems.

The invention discloses a decompression valve, which belongs to the field of decompression equipment, and mainly solves the problem that the sealing effect of the decompression valve is not good under the high temperature and high pressure working condition of the common flange gasket sealing form at present, which will cause leakage. The fixed value spring is fixedly installed on the lower part of the valve, and the fixed value spring is stretched or relaxed corresponding to the desired output pressure. Through the possibility of arranging two fixed value springs in the valve, a larger adjustment range is obtained for the output pressure. The lower side of the fixed value spring is provided with a piston, the two sides of the piston are provided with a Y-shaped ring, the left side of the Y-shaped ring is provided with a stop pin, the lower part of the Y-shaped ring is provided with a fixed seat, and the two sides of the fixed seat are provided with O Type ring, the lower side of the fixed seat is fixedly connected with a spring plunger, and a balance spring is arranged below the spring plunger, and the balance spring is connected with the valve body. The present invention is novel and unique, and in terms of internal design, the pressure value is regulated by the air pressure and the spring elastic force, and the pressure regulation precision is higher.

The invention belongs to the technical field of operation power distribution and voltage regulation of a power distribution network, and especially relates to a distributed flexible voltage-regulationcontrol system for a power distribution network. The system provided by the invention can guarantee the qualified rate of the voltage of a user terminal, and improves the power supply quality. The system comprises a power frequency double-splitting transformer, a first double buck / boost AC-AC converter module, a second double buck / boost AC-AC converter module, an inductor L, a capacitor C, a DSP,and a bypass switch S. The structural main points of the system are that a first secondary side of the power frequency double-splitting transformer is connected with the input end of the first doublebuck / boost AC-AC converter module, and a second secondary side of the power frequency double-splitting transformer is connected with the input end of the second double buck / boost AC-AC converter module; one output end of the first double buck / boost AC-AC converter module is connected with one end of the capacitor C and one end of the bypass switch S through the inductor L.

The invention discloses a vacuum interrupter aging device based on real-time voltage regulation, including a base. The top of the base is fixedly connected with a case. A partition board is fixedly connected between the two sides of the inner wall of the case. The top of the partition board is fixedly connected with a voltage regulation box. A resistance coil rod and a guide copper bar are fixedlyconnected in sequence from top to bottom between the two sides of the inner wall of the voltage regulation box. The outer surface of the resistance coil rod is connected in a sliding manner with a first conductive copper sleeve. The outer surface of the guide copper bar is connected in a sliding manner with a second conductive copper sleeve. The invention relates to the technical field of electric power facilities. By using the vacuum interrupter aging device based on real-time voltage regulation, the precision of voltage regulation is greatly improved, the effect of voltage regulation is enhanced, high-precision mechanical voltage regulation on aging equipment is realized, the voltage of aging equipment can be regulated quickly and conveniently, and great convenience is brought to peoplein vacuum interrupter aging.

The invention belongs to the technical field of operation power distribution and voltage regulation of a power distribution network, and especially relates to a distributed-type flexible voltage regulation topological structure for a power distribution network based on an AC-DC converter. The structure provided by the invention can guarantee the qualified rate of the voltage of a user terminal, and improves the power supply quality. The structure comprises a power frequency double-split transformer, a first double-step-down / step-up AC-AC transformer module, a second double-step-down / step-up AC-AC transformer module, an inductor L, a capacitor C, and a bypass switch S. the main points of the structure are that a first primary side of the power frequency double-split transformer is connectedwith the input end of the first double-step-down / step-up AC-AC transformer module, and a secondary side of the power frequency double-split transformer is connected with the input end of the second double-step-down / step-up AC-AC transformer module.

The invention discloses a simulation device for teaching, and the device comprises a support, a coal seam, and a rock stratum, wherein the coal seam and the rock stratum re disposed on the support. The rock stratum is provided with a confined aquifer, and the confined aquifer is formed by the connection of a plurality of small water bags. Each small water bag is in a cuboid structure which is formed by the enclosing of a top plate (1), a bottom plate (2), a front side wall (3), a rear side wall (4), a left side wall (5), and a right side wall (6), wherein the interior of the cuboid structure serves as a water space. The left side wall (5) of each small water bag is provided with a water inlet (7), and the right wall (6) of each small water bag is provided with a water outlet (8). The device and method can achieve the approximate simulation of confined water in a process of coal mining when there is an aquifer in an overlying rock.