661 results about "Medium pressure" patented technology

The invention discloses a temperature and pressure sensor for a new energy automobile, and belongs to the technical field of sensor equipment, the temperature and pressure sensor comprises a plug assembly, a shell and a protective sleeve, a support seat, a circuit board, a temperature sensing probe and a pressure sensing element are arranged in the shell, the protective sleeve is arranged at the lower waist part of the support seat, and the temperature sensing probe is located in the protective sleeve and is in electric signal connection with the circuit board; a square groove for containing the pressure sensing element and the circuit board is formed in the top of the support base, the pressure sensing element is arranged at the bottom of the circuit board and is in electric signal connection with the circuit board, and a pressure transmission channel is further arranged in the shell. The pressure transmission channel comprises a gap part defined by a protective sleeve and a shell and a special-shaped channel formed in the support base, a circular pressure groove is formed in the square groove, the circular pressure groove is matched with the pressure sensing element to form a pressure cavity which is eccentrically designed relative to the shell in the axial direction, and the special-shaped channel is formed in a medium leading-in area. Therefore, the medium entering surface area can be increased through the eccentric design, and the response speed of medium pressure measurement is ensured.

The utility model relates to an anti-backpressure high-precision spring safety valve which comprises a valve body, a valve seat, a valve clack, a valve rod, a guide sleeve and a spring pressure setting device, the lower end of the guide sleeve is pressed at an inlet of the valve body through a radial outer step of the valve seat, and a protruding cylinder arranged on the upper portion of the valve seat is concentrically sleeved in a guide cavity of the guide sleeve. The valve clack is sleeved in the guide cavity of the guide sleeve to form a piston type dynamic sealing structure, so that the concentricity of the valve clack and the sealing surface of the valve seat can be kept, and the sealing matching performance of a sealing pair is improved; the upper end of the guide sleeve is in sealing connection with the inner wall of the spring cavity on the upper portion of the valve body, the valve clack and the spring cavity are sealed and isolated from an outlet cavity of the valve body, back pressure of outlet cavity medium pressure on the valve clack is eliminated, and influence of corrosion of media on the spring on setting pressure is avoided. The device has the advantages of high pressure setting precision, reliable sealing performance of a sealing pair and the like.

The invention discloses a pilot valve control method and device based on data detection and automatic pressure regulation, and relates to the technical field of pilot valves. The method comprises the steps that the medium pressure of a piston containing cavity is obtained in real time through a pressure sensor, and the displacement amount of a piston shaft is obtained in real time through a displacement sensor; querying a pre-stored pressure-displacement correlation curve based on the medium pressure to determine a target displacement amount; generating an adjusting signal according to the deviation data of the real-time displacement and the target displacement; and the pressure regulating component is controlled to dynamically regulate the pretightening force of the spring to realize pressure closed-loop control. The device comprises a mechanical execution unit, a data detection unit and a control processing unit, all the units work cooperatively, closed-loop control over pressure adjustment is achieved by detecting medium pressure and piston shaft displacement in real time and dynamically adjusting spring pre-tightening force, and the device has the advantages of automatic calibration, manual intervention reduction and control precision improvement.

The invention discloses an angle-adaptive and pressure-adjustable optical element polishing grinding head, and belongs to the technical field of precision manufacturing, the angle-adaptive and pressure-adjustable optical element polishing grinding head comprises a bottom plate, a positioning mounting pin is arranged in the center of the upper surface of the bottom plate, an air nozzle is mounted on the upper surface of the bottom plate, and a corrugated pipe connector is arranged on the lower surface of the bottom plate; the corrugated pipe connector is connected with the top end of a corrugated pipe, a grinding head base is installed at the bottom end of the corrugated pipe, and a grinding head is connected to the lower portion of the grinding head base through a clamping ring. According to the angle-adaptive and pressure-adjustable optical element polishing grinding head, the angle of the grinding head is automatically adjusted through the flexible structure of the corrugated pipe, the grinding head is dynamically attached to the surface of an optical element, and the grinding head adapts to the surface with the complex curvature; the contact pressure between the grinding head and the surface is accurately controlled by regulating and controlling the medium pressure in the corrugated pipe, and excessive grinding or damage is avoided. The closed cavity guarantees the stability of the system, and the dynamic adjusting capability guarantees the real-time optimization of the angle and the pressure in the machining process.

The invention discloses an automatic medium-pressure online detection and closed-loop control method for die steel, relates to the technical field of medium-pressure online detection, and is used for solving the problems that the probability of production deviation is increased and the precision of medium-pressure interval range adjustment is reduced due to abnormality discovery lag. Collecting a pressure fluctuation value and an off-center peak value to comprehensively judge whether the conditions are abnormal; when an abnormal instruction is generated, entering a pressure test stage, calculating a pressure scaling interval based on vibration deviation and fan frequency, adjusting a default pressure interval to obtain a new pressure control interval, and comparing the new pressure control interval with a pressure value; and when the temperature exceeds the range, the surface temperature uniformity of the steel billet is detected, a fault-tolerant proportional adjustment pressure scaling interval is calculated, a control interval is updated and subjected to secondary comparison, whether an abnormal instruction is eliminated or not is determined, production abnormity is found in time, the abnormity judgment accuracy is improved, the abnormity is found in time, and the dynamic adjustment precision of the pressure control interval is improved.

The utility model discloses a five-eccentric high-temperature hard sealing butterfly valve which comprises a valve body and a butterfly plate, a valve seat is arranged on the valve body, a sealing ring corresponding to the valve seat is arranged on the butterfly plate, a spherical cambered surface structure is arranged on an outer ring of the sealing ring, a valve shaft is further arranged in the valve body and penetrates through the valve body to be fixed with the butterfly plate, and a bottom cover is further arranged on the valve body. One end of the valve shaft penetrates through the valve body and abuts against the bottom cover. Compared with the prior art, the five-eccentric high-temperature hard sealing butterfly valve has the advantages that the spherical cambered surface structure and the perfect circular sealing surface of the valve seat form a linear sealing pair, forced linear sealing is formed based on medium pressure and torque applied by the valve shaft, the contact area of the linear sealing pair is small, the sealing effect is larger under the same torque force and pressure, and the sealing effect is better. And the perfect circular sealing specific pressure is uniform, the sealing zero-leakage performance is improved, the sealing device is particularly suitable for the working conditions of high temperature, ultralow temperature and temperature cross change, deformation generated by a sealing pair under the height difference is uniform, and the stability of the sealing performance can be guaranteed.

The invention relates to the technical field of coal mine underground drilling equipment, in particular to a gyrator for a coal mine directional drilling machine and a using method.The gyrator comprises a shell, an input shaft and an output shaft, the shaft extension end of the output shaft is provided with a pressure balance type multiple dynamic sealing system, and the sealing system comprises a main sealing unit, a pressure balance unit and a dustproof sealing unit; the pressure balance unit comprises a sealing cavity, a lubricating grease injection channel and a grease injection nozzle; pressure lubricating grease is injected into the sealing cavity through the grease injection nozzle, so that a dynamic positive pressure barrier higher than the internal medium pressure of the gyrator and the external pressure of the environment is formed in the sealing cavity; through a triple sealing structure formed by combining the spring seal main seal, the pressurization balance cavity and the V-shaped dustproof ring and by combining an active injection and dynamic balance using method, passive blocking of traditional sealing is converted into active defense, the problem of invasion of high-pressure slurry and pulverized coal is effectively solved, and the service life of the sealing device is prolonged. And the working reliability and the service life of the equipment are obviously improved.

An accumulator assembly includes a medium pressure accumulator having an MPA cavity including at least one brake-side passage adjacent a first end thereof. A powered MPA two-way valve is interposed fluidically between the brake-side passage of the MPA cavity and at least one corresponding wheel brake. The MPA two-way valve includes an MPA two-way valve cavity placing the brake-side passage of the MPA cavity and the at least one corresponding wheel brake in selective fluid communication via both of an MPA two-way valve fill fluid path configured to provide pressurized hydraulic fluid to the MPA cavity and an MPA two-way valve supply fluid path configured to remove pressurized hydraulic fluid from the MPA cavity.

The utility model discloses a high-temperature-resistant flash valve exhaust nozzle structure which comprises a pipe body and an energy reduction structure. The energy reduction structure comprises at least two stages of ceramic energy reduction units which are connected in series, and the ceramic energy reduction units are connected in the pipe body; the ceramic energy reduction unit comprises a first-stage energy reduction assembly and a second-stage energy reduction assembly; the first-stage energy reduction assembly comprises a first ceramic spray pipe and a first liner pipe; the first lining pipe sleeves the outer side of the first ceramic spray pipe; the first liner tube is arranged in the tube body; the second-stage energy reduction assembly comprises a second ceramic spray pipe and a second liner pipe; the second lining pipe sleeves the outer side of the second ceramic spray pipe; the second liner tube is arranged in the tube body; the end of the first ceramic spray pipe abuts against the end of the second ceramic spray pipe. And a medium flows out of the pipe body after sequentially passing through the first-stage energy reduction assembly and the second-stage energy reduction assembly from the inlet end of the pipe body. According to the multi-stage energy reduction device, the multi-stage energy reduction assemblies connected in series are adopted, medium pressure can be decomposed into stage-by-stage release, and therefore the fluid speed is effectively reduced, and dependence on a high-temperature adhesive is also avoided.

The invention provides a thermal power generating unit deep peak regulation and efficient heat supply cooperative regulation and control method. The method comprises the steps of 1, thermodynamic modeling and performance analysis; 2, multi-section steam extraction optimal configuration; 3, designing a heat exchange and storage device; 4, dynamic regulation and control strategy development; and 5, verifying the system performance. According to the method, thermal performance and heat supply capacity of the unit under different load conditions are analyzed by constructing a thermal power unit thermodynamic simulation model, collecting operation parameters and performing thermotechnical calculation, steam distribution is optimized by adjusting the steam extraction proportion of a high-medium pressure cylinder and a low pressure cylinder, and meanwhile a heat exchange device and a heat storage device are designed and integrated. The method is used for balancing the heat supply capacity under the low-load and high-load working conditions. The dynamic regulation and control strategy further realizes real-time optimization and adjustment of combustion and heat supply, and ensures that the system stably operates under the deep peak regulation condition. Through simulation modeling and a dynamic regulation and control strategy, the heat energy utilization efficiency and the unit stability are effectively improved, meanwhile, coal consumption is reduced, and the deep peak regulation requirement is met.

The invention relates to a variable load leakage and deformation controllable mechanical sealing device, and belongs to the technical field of mechanical sealing.The variable load leakage and deformation controllable mechanical sealing device comprises a shaft sleeve, a shell, a first mechanical sealing mechanism and a second mechanical sealing mechanism, and the shell is provided with a lubricating liquid inlet and a lubricating liquid outlet; the first mechanical sealing mechanism is arranged between the shaft sleeve and the shell, the second mechanical sealing mechanism is arranged between the shaft sleeve and the shell, a liquid cavity is defined by the first mechanical sealing mechanism, the shaft sleeve, the shell and the second mechanical sealing mechanism, and the lubricating liquid inlet and the lubricating liquid outlet are both communicated with the liquid cavity. The pressure of lubricating liquid entering from the lubricating liquid inlet is dynamically changed, the pressure of the lubricating liquid is always larger than the pressure of a medium in the circulating pump, and the pressure difference is within a preset range. The mechanical seal has the advantages that the use effect of the mechanical seal is effectively guaranteed under the condition that the medium pressure in the circulating pump changes, and the mechanical seal can be suitable for the high-pressure variable-load working condition.

The invention discloses a duct piece structure and a construction method thereof, and solves the problems that in the prior art, a shaft duct piece structure is insufficient in bearing capacity, and the posture of a shaft cannot be adjusted. The duct piece structure comprises an outer frame, the outer supporting face of the outer frame is an opening face, a plurality of grid cavities are formed in the outer frame, bag structures capable of being filled with media are arranged in the grid cavities, and the bag structures face the opening face of the outer frame; a plurality of outer frames can be spliced into a whole segment ring, and a communication channel capable of being selectively connected and disconnected is arranged between the bag body structures of the upper and lower adjacent whole segment rings. According to the duct piece structure, an outer frame inner core structural body is formed under different media through the structure of the outer frame and the inner bag body, under the condition that the bearing capacity is guaranteed, the dead weight of a large and deep vertical shaft structure is reduced, and the strength of the vertical shaft structure is enhanced through the bag body filling / replacing medium pressure, materials and other parameters. The capsule body structure is arranged in the outer frame body in a partitioned mode, the acting force between the capsule body structure and the stratum is changed through fixed-point medium charging and discharging, and the purpose of adjusting the position and posture of the segment structure in the circumferential direction is achieved.

The invention provides a non-contact measuring device and method for medium pressure in a pipeline based on an ultrasonic surface wave array, and the device comprises an ultrasonic surface wave array transmitting module, an ultrasonic surface wave receiving module, a signal amplification circuit, a high-speed signal collection card, a drive circuit, and an industrial control computer. Respectively sending driving instructions to the driving circuit when the medium pressure in the test pipeline is zero and the test pipeline is in a working state; after the amplified ultrasonic surface wave signals are received, extracting frequency signals including a zero-pressure state ultrasonic surface wave array frequency f0 and a working state ultrasonic surface wave array frequency f, calculating to obtain an ultrasonic surface wave array frequency difference value, and calculating a pressure indicating value through a pressure calculation formula; based on the ultrasonic surface wave array, the pressure of the medium in the pipeline is inverted by measuring the frequency of the ultrasonic surface wave, high-precision non-contact measurement of the pressure of the medium in the pipeline can be realized, and the sensor belongs to a novel mechanical sensor.

The utility model provides a six-tower thermal coupling refining device for crude methanol, which comprises a pre-rectifying tower, a normal-pressure rectifying tower, a negative-pressure rectifying tower, a medium-pressure rectifying tower, a pressurized rectifying tower I and a pressurized rectifying tower II, the tower top of the pre-rectifying tower is connected with a normal-pressure tower reboiler I, and the tower top of the normal-pressure rectifying tower is connected with a negative-pressure tower reboiler; the top of the medium-pressure rectifying tower is connected with a pre-tower reboiler, the top of the pressurized rectifying tower I is respectively connected with a medium-pressure tower reboiler and a pressurized tower II reboiler, and the top of the pressurized rectifying tower II is connected with an atmospheric tower reboiler II; in the application, methanol steam at the top of a pressurized rectifying tower I provides heat for a medium-pressure rectifying tower and a pressurized rectifying tower II; methanol steam at the top of the medium-pressure rectifying tower provides heat for the pre-rectifying tower; top steam of the pre-rectifying tower and top methanol steam of the pressurized rectifying tower II provide heat for the normal-pressure rectifying tower; the tower top steam of the normal-pressure rectifying tower provides heat for the negative-pressure rectifying tower; the steam at each tower top is utilized, and the unit consumption of the methanol rectification process is 0.36-0.50 t steam / t refined alcohol.

The invention discloses a regulating valve capable of quickly realizing large and small flow switching and a control method thereof, relates to the technical field of regulating valves, and is obviously different from a conventional regulating valve in improvement of a valve rod structure. The initial purpose is to meet the requirement for medium flow fluctuation in an upstream channel through the moving capacity of the movable valve rod, the control method comprises three stages of self-weight balance, information interaction and opposite regulation and control, opening balance is completed through a balancing weight, then the medium flow and valve element opening information are combined, and the valve element opening degree is adjusted and controlled. Two times of opening degree switching are achieved through the fixed valve rod and the electromagnetic action assembly in sequence, the fluid flow fluctuation scene can be adapted, the pressure fluctuation influence during opening degree switching is reduced, firstly, self-adaption can be conducted according to the medium flow change in an upstream channel, and secondly, active interference can be conducted through the electromagnetic action assembly; the passing requirement of a medium in a downstream channel is ensured, and the negative influence caused by medium pressure is reduced.

An air separation unit and associated method for separating air by cryogenic distillation using a distillation column system including a high pressure column, a low pressure column, a medium pressure kettle column, and an argon column arrangement is provided. The air separation units and methods disclosed herein are particularly useful for the production of high purity nitrogen for electronic applications, and include a nitrogen recirculation loop required to obtain higher purity nitrogen products. In addition to the medium pressure kettle column, the air separation unit of the present invention and associated methods employ a direct flow argon condenser and a direct flow kettle column reboiler, a direct flow kettle column condenser, preferably disposed within the low pressure column.

The invention relates to the technical field of bearings, in particular to a comprehensive evaluation method and system for the sealing performance of a deep groove ball bearing. According to the method, the actual working state of the deep groove ball bearing is obtained through the dynamic contact half width and the contact stress, the health condition of a sealing part can be reflected more accurately, and the dynamic characteristics of the sealing change in the working process of the bearing can be captured in time by measuring the total contact pressure and the contact stress in real time; by monitoring the pressure driving leakage rate and the centrifugal effect leakage rate of the contact area of the sealing lip and the bearing ring, the sealing performance can be evaluated more directly and accurately, and by monitoring the dynamic oil film thickness and the medium pressure difference of the contact area in real time to obtain the leakage rate, the sealing state can be reflected more accurately. By comprehensively considering various factors such as the pressure driving leakage rate and the centrifugal effect leakage rate, a more comprehensive sealing efficiency index can be obtained, and the accuracy and reliability of sealing performance evaluation are improved.

The utility model provides a fluid medium pressure gauge which is easy to install quickly, comprising a fluid pressure gauge body, a first pipe connecting section and a second pipe connecting section, the bottom end of the fluid pressure gauge body and the first pipe connecting section are integrated into a structure, and the middle part of the first pipe connecting section and the second pipe connecting section are integrated into a structure, one end of the first pipe connecting section and one end of the second pipe connecting section are both provided with a one-way ventilation seat, the interiors of the two one-way ventilation seats are both provided with mounting sleeves, the tail ends of the two mounting sleeves are both provided with conical sealing sleeves, and the soft rubber sections in the middle parts of the two mounting sleeves are both provided with semicircular limiting frames. The utility model changes the traditional bolt installation method by arranging the mounting sleeve, the conical sealing sleeve, the arc-shaped pressing piece, the linkage pressure rod and the semicircular limiting frame inside the one-way ventilation seat, thereby improving the quickness of installation, and arranging an inflatable sealing ring and an air-inflating section to improve the sealing of the installation and prevent leakage.

The invention provides a valve device. The valve device comprises a main valve component, a bypass valve component and a communicating pipe. When the medium pressure difference of the inflow runner part and the outflow runner part of the main valve part reaches the preset value, the first valve port part of the bypass valve part can be opened for pressure relief, the bypass valve part and the main valve part are integrated, and the problem that the pressure relief function is lost due to reverse installation of the bypass valve part does not exist. The bypass valve component is provided with the pressure gauge connector part, the bypass valve component has a bypass function and a cut-off function, a channel between the pressure gauge connector part and the main valve component can be cut off, and the safety problem when the pressure gauge is connected is solved.

The utility model discloses a straight-through type hydraulic stop valve which comprises a valve body, a piston type valve element and a valve seat, an overflowing channel is arranged in the middle of the piston type valve element in a penetrating mode, the piston type valve element is arranged in the valve body in a sliding mode, and a sliding part attached to the inner wall of the valve body is arranged on the periphery of the piston type valve element. A first cylinder seat and a second cylinder seat are installed at openings in the two ends of the valve body respectively, the inner wall of the first cylinder seat and the inner wall of the second cylinder seat are attached to the outer wall of the piston type valve element, a first cavity is formed between the first cylinder seat and the sliding part, and a second cavity is formed between the second cylinder seat and the sliding part. A first medium channel and a second medium channel which are communicated with the first cavity are formed in the side portion of the valve body in a penetrating mode, the valve seat is installed at one end of the valve body, and an overflowing hole is formed in the valve seat. The valve element is driven to move close to or away from the valve seat in a hydraulic driving mode, opening and closing of the valve are achieved, the opening and closing action is rapid, upstream medium pressure does not need to be considered, and the using reliability and convenience of the valve are greatly improved.

The utility model provides a switch cabinet pressure relief channel and a medium voltage nuclear power switch cabinet equipped with the pressure relief channel, the switch cabinet pressure relief channel comprises two groups of side plates arranged in parallel, the tops of the two groups of side plates are fixedly equipped with a top cover plate, the two ends of the two groups of side plates are fixedly equipped with sealing plates, and the side plates, the top cover plate and the sealing plates form a box-shaped structure. The top cover plate is provided with a vent hole, an inner lining plate is fixedly mounted at the bottom of the top cover plate, an outer lining plate is arranged at the top of the top cover plate, a supporting plate is mounted between the inner lining plate and the top cover plate, and the outer lining plate, the inner lining plate and the supporting plate correspond to the vent hole in position. The medium-voltage nuclear power switch cabinet is provided with the switch cabinet pressure relief channel, so that when an arcing fault occurs in a compartment of one medium-voltage nuclear power switch cabinet, internal arcing gas can be timely discharged after being filtered layer by layer. And personnel and equipment in the power distribution room can be effectively protected from being damaged.

The invention relates to a control method, device, equipment and medium for stepped cascade electric adjusting valves, and belongs to the technical field of centrifugal separation of isotopes. The method comprises the steps that a preset pressure value and an actual pressure value corresponding to each electric adjusting valve are obtained; determining a pressure deviation value based on the preset pressure value and the corresponding actual pressure value; determining a pressure deviation change rate of the pressure deviation value based on the pressure deviation value; the pressure deviation value and the pressure deviation change rate serve as input values to be input into a fuzzy controller, output values are obtained, and the output values comprise # imgabs0 # and # imgabs1 #; superposing the output value with a set value of a controller to obtain an adjustment parameter; and the opening degree of each electric adjusting valve is adjusted based on the adjusting parameters, so that when the actual pressure value of one unit changes, the fuzzy controller adjusts the opening degrees of the electric adjusting valves of the other units according to the adjusting parameters, and the medium pressure in the low-vacuum medium environment is controlled. The pressure control device has the effect of effectively controlling the medium pressure.

The invention discloses filter material buffer equipment and a buffer method for a ZS filter. The equipment comprises an outer shell, a rough filtration assembly, a fine filtration assembly and a discharge pump, the rough filtration assembly comprises a filter screen disc arranged in the outer shell, a hollow pipe clamped in the outer shell and a material stirring rake arranged on the hollow pipe, and a driving motor is arranged at the top end of the outer shell; the fine filtering assembly comprises a positioning ring plate arranged in the outer shell, a fine filtering net clamped to the positioning ring plate, an extrusion plate and a driving ring, a moving rod is clamped to the positioning ring plate, and an electric push rod hinged to the outer shell is hinged to the driving ring; the equipment disclosed by the invention is reasonable in structural design, and the catalytic cracking oil slurry entering the ZS filter is more uniform in texture by performing coarse filtration, fine filtration and stirring homogenization treatment on the catalytic cracking oil slurry, so that the pulsation phenomenon caused by medium pressure when the catalytic cracking oil slurry enters the ZS filter is avoided, and the quality of the catalytic cracking oil slurry is improved. The running stability and reliability of the ZS filter are improved, and the ZS filter is suitable for popularization and application.

The utility model discloses a power distribution system for a double-machine regenerative backpressure air extraction type turbine equipped with a balanced generator, which comprises a double-machine regenerative system equipped with a balanced generator, a converter subsystem, a dry-type rectifier transformer, a damping cabinet and a plurality of medium-voltage switch cabinets which are electrically connected in sequence, the damping cabinet and the medium-voltage switch cabinet are electrically connected through a pouring bus. According to the utility model, an oil-immersed rectifier transformer is replaced by the high-efficiency and energy-saving rectifier dry-type transformer, and the dry-type transformer has no fire spreading danger even if a short-circuit fault occurs, so that after the dry-type rectifier transformer is adopted, the rectifier transformer can be arranged in a power distribution room which is in a main power house and is closer to a converter and auxiliary power equipment; not only can the arrangement outside the steam engine room be simplified, but also the construction cost and arrangement workload of connecting cables can be reduced; after the rectifier transformer is arranged in the main power house, one oil-immersed rectifier transformer is omitted for each machine outside the main power house, so that the arrangement outside the main power house can be simplified.

The invention provides a supercritical carbon dioxide power generation working medium pressure adjusting system, belongs to the technical field of power generation system working medium pressure adjusting, and can at least partially solve the problems that in the existing unit start-stop and load adjusting process, the system pressure is greatly changed, normal operation of a unit is affected, and the working efficiency is low. The system comprises a power generation module, and the power generation module comprises a compressor and a heat regenerator connected with the compressor through a pipeline; the carbon dioxide working medium circulating system is provided with the gas storage tank, part of the carbon dioxide working medium is stored in the gas storage tank through the differential pressure of the high-pressure part and the low-pressure part of the circulating system, the working quality of the circulating system is adjusted, and the carbon dioxide working medium circulating system has the advantages of being simple and convenient to operate.

The invention provides an integrated ball valve which comprises a valve body and an actuator, a ball body is arranged in the valve body, the actuator is in driving connection with the ball body through a valve rod, the integrated ball valve is characterized by further comprising an electromagnetic valve, a first piston cylinder and a second piston cylinder, a first piston is arranged in the first piston cylinder, and a second piston is arranged in the second piston cylinder. A first piston is arranged in the first piston cylinder, a second piston is arranged in the second piston cylinder, the first piston and the second piston are in meshed connection with the valve rod, and the electromagnetic valve is used for introducing medium pressure on the high-pressure side of the valve body into the first piston cylinder and / or the second piston cylinder so that the first piston cylinder and / or the second piston cylinder can act. The piston cylinder is arranged on the valve body, medium pressure is introduced, driving force is formed at the two ends of the piston through medium pressure difference, the driving force and the actuator are combined to drive the valve rod to achieve rapid opening and closing of the valve, and the problems that an actuator of an existing high-pressure working condition integrated ball valve is large in size and weight and long in opening and closing time are solved.

The invention relates to a low-voltage, medium-voltage or high-voltage switchgear, comprising: a first component (10); the air guide structure comprises a plurality of guide vanes (30, 40, 50 and 60); wherein the plurality of guide vanes are located adjacent to the first component; and wherein one or more of the plurality of guide vanes are configured to direct air into the air guide structure at an inlet, then flow tangentially to the first surface of the first component, and then exit the air guide structure at an outlet.

An annular groove is formed in a valve body, a piston ring and a valve seat ring are arranged in the annular groove, a movable valve seat is arranged at the front end of the valve seat ring, the movable valve seat is matched with a butterfly plate in a conical surface hard sealing mode, and a drainage hole is formed in the bottom of the annular groove. A reverse medium enters the annular groove through the drainage hole to push the piston ring, the piston ring pushes the valve seat ring, and the valve seat ring pushes the movable valve seat, so that the movable valve seat is wedged on the sealing surface of the butterfly plate; when a medium flows in the forward direction, the downstream is a low-pressure area, the piston ring is pushed to the bottom of the annular groove, the valve seat ring and the movable valve seat are pushed by the medium to be tightly attached to the sealing face of the butterfly plate, the larger the medium pressure is, the larger the sealing force is, and the medium pressure self-sealing effect is achieved; the movable valve seat is pushed by a medium to be tightly attached to the sealing face of the butterfly plate for compensation, and therefore the whole sealing pair can keep the sealing performance of a new valve after being opened and closed at high frequency.

The invention discloses an intelligent monitoring method and system applied to a high-pressure and medium-pressure valve, and the method comprises the steps: collecting data through an embedded multi-sensor network according to the real-time operation state and environment pressure data of the high-pressure and medium-pressure valve, and carrying out the comprehensive processing of the collected data through a self-adaptive data fusion algorithm, so as to obtain the comprehensive working characteristics of the valve; based on the working characteristics of the valve, identifying a potential fault mode of the high and medium pressure valve in real time by adopting an anomaly detection algorithm based on machine learning; and according to the potential fault mode, a corresponding maintenance and repair plan is generated based on a decision tree algorithm, and the maintenance and repair plan is fed back to an operator through a mobile terminal application, so that intelligent monitoring of the high and medium pressure valve is realized. According to the embodiment of the invention, real-time monitoring and fault early warning of the valve can be realized, optimization of maintenance and repair plans is facilitated, and the intelligent level of valve management is improved.

The invention discloses a staged opening double-disc flat gate valve and a sealing specific pressure adjusting method thereof, the flat gate valve comprises a valve body, a piston plate is arranged in a middle cavity formed between the valve body and a valve cover, the piston plate divides the middle cavity into an upper middle cavity and a lower middle cavity, and a cavity pressure adjusting mechanism is arranged on the piston plate; a center plate is arranged at the lower end of the valve rod, left and right disc springs are respectively arranged between the center plate and the left and right flashboards, and the center plate is in graded lifting fit with the left and right flashboards; a hole channel communicated with the outlet cavity is formed in the bottom of the valve body, the lower middle cavity can be communicated with the hole channel through the flashboard separation cavity, and a sealing plug is arranged at the lower end of the center plate and matched with the hole channel; according to the sealing specific pressure adjusting method, the medium pressure in the lower middle cavity is adjusted through the cavity pressure adjusting mechanism so as to adjust the acting force of the medium in the lower middle cavity on the left gate plate and the right gate plate, and therefore the sealing specific pressure of the sealing pairs between the left gate plate and the left valve seat and between the right gate plate and the right valve seat is adjusted. Adjustment of the gate sealing specific pressure is achieved, and leakage is reduced; the gate is opened in a staged mode, and abrasion is reduced.