2730 results about "Butterfly valve" patented technology

The invention provides a sewage treatment aeration control system and method based on multi-parameter collaborative optimization. The method comprises the following steps: acquiring multi-sensor data of COD (Chemical Oxygen Demand), BOD5 (Biochemical Oxygen Demand), DO (Dissolved Oxygen Demand), ammonia nitrogen, ORP (Oxidation Reduction Potential), pH (Potential of Hydrogen), water inlet flow and sludge concentration of wastewater in an aeration tank by utilizing a multi-parameter sensor module; according to the dynamic correction oxygen mass transfer coefficient and the feedforward parameter, establishing a relationship between the water inlet load and aeration; calculating the air volume of an air blower and the fine adjustment value of the opening degree of a butterfly valve through a PID control algorithm and feedback parameters, and correcting the aeration quantity to obtain a total air volume target value; and adjusting the opening degree and the rotating speed of a guide vane of the air blower according to the self-adaptive PID control parameters and the corrected total air volume target value by utilizing a self-adaptive PID controller, and adjusting the opening degree of a butterfly valve according to a gradient butterfly valve adjusting strategy. The output of the air blower is optimized by adopting self-adaptive PID, and the opening degree of the butterfly valve of each biological tank is dynamically adjusted through a gradient valve adjusting strategy, so that the accurate control of the aeration rate is realized; the sewage treatment effect is ensured.

The invention relates to the technical field of butterfly valves, in particular to an eccentric butterfly valve which comprises an eccentric valve body, a butterfly valve plate, a valve rod, a movable brake block and a transmission assembly, a water flowing cavity is formed in the eccentric valve body, the valve rod is rotationally installed on the eccentric valve body, the butterfly valve plate is rotationally installed on the valve rod, a sealing ring is fixedly installed on the butterfly valve plate, and the movable brake block is fixedly installed on the sealing ring. The sealing ring is attached to the water flowing cavity, two through holes are formed in the butterfly valve plate, two movable brake blocks corresponding to the through holes are installed on the butterfly valve plate in a sliding mode, and the transmission assembly is connected with the valve rod and the movable brake blocks at the same time. The through hole is formed in the butterfly valve plate, the movable brake block corresponding to the through hole is arranged, the movable brake block is controlled to change the opening and closing state of the through hole, impact force borne by the two sides of the butterfly valve plate from liquid when the butterfly valve plate rotates to open the water flowing cavity is reduced, the service life of the butterfly valve plate is prolonged, and the maintenance frequency of the eccentric butterfly valve is reduced.

The invention discloses a special working condition corrosion-resistant valve and relates to the technical field of valves, the special working condition corrosion-resistant valve comprises a valve body, a valve rod, a butterfly plate and a transmission device, and a valve seat containing cavity is defined by a limiting ring and a valve seat gland in the valve body on one side of the butterfly plate; a valve seat which can only slide in the axial direction of the valve body slides in the valve seat containing cavity in a sealed mode, and the whole valve seat is completely contained in the valve seat containing cavity. A metal sealing ring is fixedly installed on the outer periphery of the butterfly plate, and a valve seat sealing face matched with the metal sealing ring in a sealing mode is arranged on the inner side of the valve seat. And an elastic element is arranged between the valve seat and the valve seat gland. According to the three-eccentric butterfly valve, through the collaborative design of the three-eccentric structure, the hidden valve seat, the L-shaped fluid channel and the self-adaptive plugging assembly, the advantages of the three-eccentric butterfly valve are reserved, the defect of exposed design of a traditional valve seat is overcome through structural innovation, and it is ensured that the valve is accurate in action and reliable in sealing in the opening and closing process; and the sealing structure is particularly suitable for special working conditions with strict requirements on sealing performance and service life.

The utility model discloses a double-butterfly-valve sterile medicine transfer system, and relates to the technical field of pharmacy. Comprising a turnover medicine storage tank, a driving butterfly valve, a driven butterfly valve, a powder storage tank and a sterile liquid medicine storage bag, a discharging port of the turnover medicine storage tank is connected with the driving butterfly valve through a first connecting piece, and the driving butterfly valve is connected with the driven butterfly valve through a second connecting piece; the passive butterfly valve is connected with a feeding port of a powder storage tank through a third connecting piece, a first diaphragm valve is arranged at a discharging port of the powder storage tank, and the discharging port of the powder storage tank is connected with a sterile liquid medicine storage bag; by adopting the design of double butterfly valves, sterile connection is established between the turnover medicine storage tank and the powder storage tank, the reliability of hoop connection is high, the structure is simple, the operation complexity is low, the universality is high, the flexibility is high, and the cost is low.

The invention provides an eccentric butterfly valve performance detection method and system based on optical detection. The method comprises the steps that a first image of light transmission intensity distribution of a sealing pair structure of a bidirectional all-metal hard sealing four-eccentric butterfly valve is obtained; acquiring a reflection interference image of the structured light on the sealing pair structure according to the phase modulation structure grating light field, and performing conjoint analysis in combination with the first image to generate a contact pressure distribution matrix; based on the first image and the contact pressure distribution matrix, extracting corresponding multi-dimensional image features to generate a leakage early warning area map; space comparison is carried out on the leakage early warning area map and the floating response track of the sealing pair structure in the opening and closing process, and the corresponding floating response characteristics of the leakage early warning area in the opening and closing process are determined; and generating a butterfly valve sealing performance detection result according to the abnormal degree of the floating response characteristics. Through the implementation of the scheme, the leakage early warning area and the corresponding dynamic abnormal characteristics can be identified in advance, and the safety and the operation stability of the system are improved.

The invention discloses a low-temperature methanol washing RTO tail gas treatment device adopting a self-circulation air cooling double-valve-plate butterfly valve, and relates to the technical field of waste gas treatment. By arranging the condensation impurity removal mechanism, when coal waste gas passes through one condensation assembly, low-temperature tail gas cleaned by the low-temperature methanol washing mechanism can flow through a plurality of heat exchange pipes in the condensation assembly at the same time, so that the temperature of the outer walls of the heat exchange pipes is rapidly reduced to be below zero DEG C; coal tar gas and water vapor flowing through the low-temperature heat exchange pipe can be quickly cooled and solidified after being in contact with the outer wall of the low-temperature heat exchange pipe, so that the effect of separating the coal tar gas and the water vapor from the tail gas is achieved; a cold source which cannot be utilized and can influence subsequent RTO furnace treatment in the part of tail gas is ingeniously used for separating energy of coal tar and water vapor in the waste gas, a refrigerating device does not need to be independently arranged in the cooling and condensing process of the coal tar and the water vapor, and the purposes of energy conservation and emission reduction are achieved.

The invention belongs to the technical field of regulating valve noise reduction, and particularly relates to a sleeve multi-stage noise reduction regulating valve system which comprises a sleeve multi-stage noise reduction regulating valve, a pneumatic diaphragm actuator, an air source control device, an intelligent control device, a butterfly valve, a reducing joint, a companion flange and a user pipeline. The sleeve multi-stage noise reduction regulating valve comprises a valve body. When fluid enters the valve, water flow is preliminarily dispersed through the first noise reduction holes in the outer layer, direct impact of the fluid on the valve body is reduced, noise is lowered, the water flow enters the upper sleeve and then falls onto the inclined buffer baffles, the buffer baffles are arranged in an up-and-down alternate multi-layer mode, and therefore the situation that the water flow vertically falls down and directly flushes the valve body is avoided, and noise is further lowered; and then the water flow passes through the second noise reduction hole in the inner layer, the water flow is further dispersed, direct impact of the fluid on the valve body is reduced again, formation of turbulent flow can be effectively restrained through the first noise reduction hole with the variable diameter, the second noise reduction hole with the variable diameter and the inclined buffering baffle, and therefore noise is reduced.

The invention provides a method for adjusting a gas inlet device in semiconductor processing equipment and the semiconductor processing equipment, and the method comprises the steps: conveying gas through a reference path exhaust device with a flow controller, and obtaining an associated gas supply parameter reference value under a preset gas supply condition, the gas supply condition and the gas supply parameter both relate to the cavity pressure and the opening degree of the exhaust butterfly valve; gas is conveyed through the selected adjustment gas inlet device, and related gas supply parameter adjustment values are obtained; and calculating according to the gas supply parameter reference value and the gas supply parameter adjustment value to obtain a gas flow deviation, adjusting the selected gas pressure regulating valve of the adjustment gas inlet device to enable the gas flow deviation to meet the requirement, and completing adjustment of the adjustment gas inlet device. According to the adjustment method, the process is simple, and the gas flow of the gas inlet device provided with the adjusting valve is equivalent to the gas flow of the gas inlet device provided with the flow controller through gas flow deviation adjustment, so that the gas pressure adjusting valve is equivalent to the flow controller, the usage amount of the flow controller is reduced, and the cost is effectively reduced.

The present invention relates to the technical field of valves, and disclosed is a butterfly valve for use in ultra-low temperature environment. The butterfly valve comprises a valve body (1), a butterfly disc (2) in the valve body (1), a valve seat (3) matching with the butterfly disc (2), a valve stem (4) fixed to the butterfly disc (2), and an operating assembly (5) for driving the valve stem (4) to rotate, wherein a manhole (11) and an observation cover (12) covering the manhole (11) are provided on the valve body (1), and the observation cover (12) is detachably connected to an outer edge of the manhole (11) on the valve body (1); a cleaning assembly (6) is provided on an outer side face of the valve body (1), and the cleaning assembly (6) comprises a cleaning member (61) located above the observation cover (12) and a driving member (62) for driving the cleaning member (61) to slide back and forth on an upper side face of the observation cover (12); and an operating wheel (51) rotates to drive the driving member (62) to operate, and one side of the cleaning member (61) abuts against the upper side face of the observation cover (12), which reduces the difficulty of maintenance of the butterfly valve and improves the efficiency of maintenance of the butterfly valve. In addition, the rotation of the operating wheel (51) can drive the driving member (62) to operate, which in turn drives the cleaning member (61) to clean an outer surface of the observation cover.

The invention relates to the technical field of pressure control, in particular to a butterfly valve pressure self-adaptive adjusting method, device and equipment and a storage medium. According to the method, a pre-constructed neural network model is introduced, and user set pressure, actual measurement pressure, current control signals and error parameters serve as input variables; dynamic generation and real-time self-adaptive adjustment of PID control parameters are realized, the technical bottlenecks that parameter setting of a traditional PID controller is complex and adaptability to non-linear and time-varying systems is insufficient are effectively solved, and the parameter adjustment period is shortened; the weight parameter of the neural network is continuously optimized through a back propagation algorithm, so that the inhibition capability of the system on external disturbance is remarkably enhanced, the overshoot is reduced, and the long-term stability and control precision of pressure control are improved; the target step number is calculated in combination with butterfly valve hardware parameters, the accuracy and rapidity of stepping motor driving are ensured, and the problem of response delay of traditional PID control is effectively solved.

The invention relates to the technical field of industrial wastewater sampling and discloses an industrial wastewater sampling system.The industrial wastewater sampling system comprises a frame, a connecting frame, a hydraulic cylinder and a rectangular plate, the connecting frame is located in the frame and slidably arranged in parallel, and the bottom of the hydraulic cylinder and the right side of the interior of the connecting frame are fixedly mounted; the upper surface of the rectangular plate and one end of an output shaft of a hydraulic cylinder are fixedly mounted, and a trigger sampling mechanism is arranged in the rectangular plate. According to the industrial wastewater sampling system, when a trigger rod is in contact with the bottom of a canal, a connecting spring and a telescopic rod in a power rebound mechanism are compressed, a third rack is driven to move upwards, a valve switch control mechanism is linked, a first butterfly valve and a second butterfly valve are synchronously closed, and a sampling barrel is sealed; it is ensured that the water sample is captured at the moment when the sampler is stabilized at the target depth and bottom mud is not stirred, and therefore index distortion of suspended solids and adsorptive heavy metal is effectively avoided, and the authenticity of the sample and the accuracy of detection data are improved.

The invention discloses a wave-current combined simulation system and method in a low-pressure environment, and relates to the technical field of underwater vehicle hydrodynamic model tests. The defects that in the prior art, sealing and strength are difficult to guarantee in a low-air-pressure environment, and accurate flow velocity and shear gradient control of a multi-layer flow channel cannot be achieved are overcome. According to the technical scheme, the device comprises a low-pressure pool, a plurality of layers of layered water inlet galleries, a plurality of layers of layered water outlet galleries, a rectifying wall, a rectifying baffle, a flow guide grid, a wave absorbing bank, an in-cabin rocking plate type wave maker, a plurality of bottom flow making pump flow making systems, an electric butterfly valve, a high-voltage frequency conversion cabinet, a three-phase asynchronous motor, a gear box, an impeller shaft system and the like. All the devices work cooperatively, and accurate coupling simulation of a multi-layer flow field and high sea condition waves under low air pressure is achieved. The device is suitable for wave-current combined hydrodynamic characteristic simulation and test research of deep-sea navigation bodies and ocean engineering equipment in a low-pressure environment.

The invention relates to a pressure control method and system and a storage medium. The method comprises the steps that the monitored current angle of a butterfly valve and the monitored current pressure of a process cavity are obtained; determining the current air inflow of the process chamber according to the current angle and the current pressure of the butterfly valve; determining the predicted pressure of the process chamber at the next moment according to the current angle of the butterfly valve and the current air inflow; according to the set target pressure, the predicted pressure at the next moment and the current air inflow, the target angle of the butterfly valve is determined; and the operation path of the butterfly valve reaching the target angle of the butterfly valve in the shortest time is planned, and the butterfly valve is controlled according to the operation path so that pressure control over the process cavity can be achieved. The real-time air inflow is automatically estimated, the future pressure is accurately predicted, pressure overshoot is reduced, and the stabilization time is shortened; and the opening switching speed of the butterfly valve is maximized, the target angle is reached as soon as possible within the hardware bearing range, and then the pressure response speed is increased.

The invention provides an intelligent butterfly valve digital twinning system and method based on calculation and measurement fusion, and belongs to the technical field of digital twinning, and the system comprises a physical entity module, an information interaction module, a twinning body construction module and a visualization module. The method comprises the following steps: firstly, constructing a high-fidelity butterfly valve three-dimensional geometric model, and carrying out fluid-structure interaction simulation; secondly, real state information of the butterfly valve is transmitted to an intelligent butterfly valve digital twinning system in real time, and motion state data of the butterfly valve are obtained; thirdly, constructing a prediction agent model based on the structural performance data; and finally, constructing a high-fidelity butterfly valve virtual model, taking real-time motion state data of the butterfly valve as input to drive the butterfly valve virtual model, and completing visualization of the intelligent butterfly valve digital twin system. Accurate mapping and total factor monitoring of the butterfly valve operation state can be achieved, completeness, real-time performance and high fidelity of digital twin data are guaranteed through calculation and measurement fusion, and the safety and control accuracy of a pipe network system can be improved.

The invention relates to the technical field of powder metallurgy, and discloses an anti-sintering deformation type powder metallurgy device which comprises a powder metallurgy punching machine, a plate body is arranged on the powder metallurgy punching machine, a die groove is formed in the plate body, a punching head is arranged on the powder metallurgy punching machine, a movable base is arranged on the plate body, and a pressing plate is arranged on the movable base. A feeding pipe is fixed on the movable seat, and an electric powder butterfly valve is mounted on the feeding pipe; a rotating assembly is arranged in the moving seat and comprises a discharging pipe and an air suction pipe. Through the linkage design of the rotating assembly and the air exhaust assembly, active air exhaust is conducted on the die cavity before powder stamping, residual air is thoroughly exhausted, in the process, local stress concentration caused by high-pressure air mass formed by air compression in the pressing process is avoided, and the density of a pressed blank is more uniform and closer to a theoretical value; and compaction layering, cracks or surface defects caused by gas heating expansion are prevented.

The utility model discloses a two-way sealing butterfly valve which comprises a sealing butterfly valve body, flange plates are fixedly connected to the two ends of the sealing butterfly valve body, a plurality of bolts penetrate through the outer sides of the flange plates, rubber rings are fixedly connected to the inner rings of the flange plates, and a limiting block is fixedly connected to one side of the middle of the interior of the sealing butterfly valve body. A limiting block is arranged on the outer side of the flow limiting plate, a limiting groove is formed in the outer side of the flow limiting plate and matched with the limiting block in a clamped mode, a flow limiting hole is formed in the flow limiting plate, a circulating hole is formed in the outer side of the middle of the flow limiting plate, and a conical pipe is arranged in the flow limiting hole in a sleeved mode. The sealing butterfly valve and the rubber ring are arranged, the sealing butterfly valve is connected with the pipeline, the rubber ring needs to be inserted into the pipeline in the connecting process, the sealing abutting effect is achieved, then the outer side of the rubber ring is sleeved with the sealing ring, and the sealing effect can be enhanced in the pipeline connecting process.

The invention relates to the technical field of valves, and particularly discloses an intelligent pneumatic adjustment heating sealing butterfly valve which comprises a butterfly valve assembly, a pneumatic actuator, a temperature control unit, a control panel and a base. The pneumatic butterfly valve is characterized in that the butterfly valve assembly and the pneumatic actuator are fixedly arranged on the base, the base is provided with a frame type supporting structure, and the pneumatic actuator and the control panel are both contained in the frame type supporting structure; the butterfly valve assembly comprises an annular valve body arranged on the base, a valve rod rotationally arranged on the annular valve body and a circular butterfly plate fixedly connected to the valve rod and located in the annular valve body, one end of the valve rod is driven by a pneumatic actuator to rotate, and the other end of the valve rod is rotationally connected with the annular valve body; an annular groove and a sealing ring embedded in the groove are arranged on the periphery of the butterfly plate, the inner circle face of the annular valve body protrudes towards the butterfly plate to form an arc-shaped boss, the butterfly plate and the valve rod are located in an annular space of the annular valve body, and sealing is achieved when the butterfly plate rotates till the sealing ring abuts against the arc-shaped boss.

The invention relates to the technical field of valve control, and discloses a butterfly valve and a pressure control method thereof.The method comprises the steps that the butterfly valve is started multiple times, data of the pressure, the opening degree and the air exhaust rate of a plurality of sets of butterfly valves are obtained, and a three-dimensional power function model is established based on the pressure opening degree and the air exhaust rate; the pressure of the butterfly valve is collected in real time for multiple times in the opening and closing process of the butterfly valve, and the pressure change rate is calculated; the target pressure of the butterfly valve is set, and the ideal pressure change buffering rate of the butterfly valve is calculated based on the collected current pressure of the butterfly valve; calculating the opening degree of the butterfly valve under the target pressure; and the butterfly valve is controlled to move to the calculated target opening degree to complete control adjustment of the butterfly valve. Pressure data are collected in real time; updating butterfly valve air exhaust model parameters in a learning mode; calculating the position of a target valve and adjusting in advance; and system parameters are continuously optimized, and high precision and quick response capability of the system are ensured.

The invention provides a double-butterfly valve linkage anti-interference control method for a large air supply test device, which belongs to the technical field of aviation power devices and comprises the following steps of: simplifying inflow and outflow of an air supply adjusting system according to air mass flow into a one-way air inlet and three-way air exhaust structure; a slope pressure given signal and a pressure differential given signal are obtained based on a first discrete tracking differential module, and a filtering output signal and a differential extraction signal are obtained based on a second discrete tracking differential module; obtaining a total disturbance estimated value of the butterfly valve control loop by using the parameters based on a nonlinear discrete expansion state observation module; on the basis of the backstepping control module, the actual control quantity of the butterfly valve is obtained through the parameters; and adjusting the input gain estimation value of the butterfly valve control loop in real time based on a parameter self-adaptive adjustment module, and repeating the steps to realize the double-butterfly valve linkage anti-interference control of the large-scale gas supply test device. The method does not need manual intervention, and is fast in transient response, strong in anti-interference capability and high in robustness.

Disclosed is a sediment-proof self-cleaning butterfly valve, comprising a butterfly valve body and a filtering apparatus. The filtering apparatus comprises a pressure adjustment chamber and a filtering chamber. The pressure adjustment chamber comprises a pressure adjustment pipe, a pressure adjustment assembly slidably connected to the pressure adjustment pipe, a rotating assembly connected to the pressure adjustment assembly, and an assistive support. The filtering chamber comprises an apparatus chamber and a second docking chamber perpendicular to the axis of the apparatus chamber. A filtering assembly and a cleaning assembly are provided in the apparatus chamber. A turbine apparatus is connected to the cleaning assembly, and the turbine apparatus drives the cleaning assembly to rotate. According to the present invention, it is possible to adapt to the pressure and flow of passing water, control the size of a water inlet of the first docking chamber, and ensure a sufficient pushing force of water when pushing the turbine apparatus to rotate. Thus, it is possible to automatically clean sediment from the filtering apparatus, ensure the filtering effect, and provide a more environment-friendly and energy-saving effect.

The present invention discloses a sealing mechanism for a butterfly valve body, comprising: a valve body main body, and a sealing assembly is arranged inside the valve body main body. In the present invention, the right end of the valve body main body is the water inlet, and the left end is the water outlet. At this time, the annular butterfly plate is in a closed state. When the annular butterfly plate is driven by the valve stem to open, as the annular butterfly plate rotates, it pushes the second sealing pad and the first sealing pad towards the support plate, and at the same time pushes the fixing plate to move and compresses a plurality of first springs. When the medium flows, it first passes through the support plate, and under the action of the triangular buffer rod, the medium is buffered to reduce the impact force of the medium. Then it flows to the fixing plate, and under the action of the flow splitting plate, the medium is split into multiple streams, and the impact force of the medium is buffered again. With the cooperation of the triangular buffer rod and the flow splitting plate, the impact force of the medium is split and buffered, reducing the wear of the annular sealing ring caused by the impact force and improving the sealing performance.

The invention relates to the technical field of hydraulic automatic control, in particular to an automatic regulating system and method for a hydraulic butterfly valve, and the system comprises a hydraulic power regulation and control module, an opening degree detection and correction module, a flow dynamic matching module, a pressure balance optimization module and an execution mechanism self-matching regulation module. According to the method, the pressure and flow characteristics are extracted through the operation parameters of the hydraulic pump, the adaptability and accuracy of hydraulic transmission are effectively improved, in butterfly valve adjustment execution, the timeliness of adjustment action and target consistency are enhanced by analyzing opening deviation and response aging quantization error accumulation in real time, accurate allocation of flow and pressure resources is achieved, and the adjustment efficiency is improved. In the dynamic control stage, the output matching sequence is continuously adjusted according to the corresponding relation between the unsatisfied requirement and the remaining capacity, response delay and adjustment deviation are remarkably reduced, and therefore the continuity, coordination and adjustment precision of butterfly valve control are improved, and stable operation of a hydraulic system under variable working conditions is effectively guaranteed.

The invention discloses an anti-jamming communicating pipe butterfly valve assembly for steam condenser cylinder cutting, which relates to the technical field of valves and comprises a valve body, a motor, a valve shaft, a valve plate, a bearing and an oil outlet assembly. The motor drives the valve shaft to rotate through the driving seat to drive the valve plate to adjust the opening and closing angle, and the valve plate is matched with the inner diameter of the valve body to optimize fluid control. Symmetrical bearings support the valve shaft to reduce friction; the oil outlet assembly converts rotation of the valve shaft into intermittent extrusion on the oil storage cavity through the linkage mechanism, lubricating oil is accurately injected into the bearing outer ring through the oil discharging channel, and automatic oil supplementing is achieved. The design solves the problem of period lag of traditional manual lubrication, ensures long-acting lubrication of the bearing, reduces abrasion and jamming risks, and is particularly suitable for harsh working conditions of high-temperature, high-pressure and high-frequency opening and closing. The valve is compact in structure, integrates fluid resistance optimization and intelligent lubrication functions, has the characteristics of high sealing performance and high temperature resistance, and effectively improves the operation reliability and prolongs the service life of the valve.

The double-eccentric butterfly valve comprises a valve body, a valve rod, a butterfly plate and a valve seat, an upper shaft hole and a lower shaft hole are formed in the upper end and the lower end of the valve body respectively, the valve rod sequentially penetrates through the upper shaft hole and the lower shaft hole, the portion, located in an inner cavity of the valve body, of the valve rod is in linkage connection with the butterfly plate, and the valve seat is made of elastic materials. The valve seat is installed on the inner wall of the valve body and used for abutting against the butterfly plate to form sealing fit when the valve is closed. The butterfly plate comprises a mounting main body, a sealing ring, a first linkage assembly and a second linkage assembly; when the valve is opened, the valve rod drives the sealing ring to move towards the direction close to the installation body through the first linkage assembly so that the sealing ring can be rapidly separated from the valve seat, and when the valve is closed, the valve rod drives the sealing ring to move towards the direction away from the installation body through the second linkage assembly so that the sealing ring can rapidly abut against the valve seat. The butterfly plate can be quickly separated from or abut against the floating valve seat at the moment of opening and closing the valve, so that abrasion of a valve sealing pair is reduced, and the service life of the valve is remarkably prolonged.

The utility model relates to a metal hard sealing structure of a three-eccentric center butterfly valve. The metal hard sealing structure comprises a valve body, a valve seat, a valve plate, a metal sealing ring and a valve plate gland, an annular groove is formed in the edge of the outer end face of the valve plate, the metal sealing ring is arranged in the annular groove, and the metal sealing ring is pressed and fixed through the valve plate gland. A metal hard sealing pair is formed between the metal sealing ring and the valve seat, and sealing surfaces between the metal sealing ring and the valve seat are matched conical surfaces; the valve plate is of an asymmetric structure; axial eccentricity b exists between the center line of the valve plate and the center line of the valve shaft, radial eccentricity a exists between the axial middle section of the metal sealing ring and the rotating center of the valve shaft, and an eccentric angle phi exists between the center line of the conical angle of the conical surface and the center line of the valve body. According to the three-eccentric butterfly valve, the size parameters and the material distribution of the valve internals are optimized, so that the structural safety and the sealing performance of the three-eccentric butterfly valve are improved.

The utility model discloses a vertical top pressure butterfly valve pressure testing machine with good stability, which comprises a hydraulic push rod and a pressure testing cushion cylinder, the output end of the hydraulic push rod is connected with a pressure testing blind plate, the pressure testing cushion cylinder is arranged right below the pressure testing blind plate and is matched with the pressure testing blind plate, and the bottom of the pressure testing cushion cylinder is connected with a front support frame. Through replacement of the pressure test blind plate and the pressure test cushion cylinder, placement pressure test operation of the pressure test machine on butterfly valves with different calibers in the later period can be achieved, compared with traditional claw cylinder linkage pressure test, the pressure test device is simple in structural design, low in cost and suitable for application and popularization, finally, the pressure test cushion cylinder can be supported through the front supporting frame, and the pressure test efficiency is improved. The possibility of toppling during detection is prevented, and the later pressure test accuracy is improved.

The utility model relates to a negative pressure conveying, metering and receiving bin. Comprising an installation support, a pipeline support arranged on the installation support, a metering bin used for metering materials, an upper barrel arranged at the top end of the metering bin, a filter element used for separating air in the materials, a bin cover installed at the top end of the upper barrel, an air suction device used for conveying the materials and a weighing module used for detecting the weight of the materials. A plurality of groups of weighing modules which are arranged in a circumferential array are arranged at the joint of the metering bin and the mounting bracket; a plurality of groups of filter elements are arranged in the inner cavity of the upper cylinder body; the air suction device is installed on the pipeline support and connected to the stock bin cover and the metering stock bin. And a discharge butterfly valve is arranged at a discharge port at the bottom end of the metering bin. The technical problems that in the prior art, in the vacuum conveying process of materials, time and labor are wasted during material conveying, more devices are needed for accurate metering, and large space is occupied, so that the material conveying cost is increased are solved.

The utility model discloses a mine paste filling powder batching device and method. The mine paste filling powder batching device comprises a silo, a silo top cover is arranged at the top of the silo, a dust remover and a safety valve are arranged on the silo top cover, a feeding port is formed in the upper portion of the silo and connected with a feeding pipe, and the bottom end of the silo is connected with an upper port of a silo cone. A lower port of the bin cone is connected with one end of a feeding pipe through a pneumatic butterfly valve A and a tubular flexible connector A, the other end of the feeding pipe is connected with a hopper top cover of a hopper barrel, the bottom end of the hopper barrel is connected with an upper port of a hopper cone, and a lower port of the hopper cone is connected with a feeding port of a spiral conveyor through a pneumatic butterfly valve B and a tubular flexible connector B; one end of the breathing pipe is connected with the side face of the feeding pipe, and the other end of the breathing pipe is connected with the hole opening of the hopper top cover; and a plurality of flow aiding devices are arranged on the cone wall of the bin cone and / or the cone wall of the hopper cone.

The invention discloses an intelligent early warning system for stainless steel cold rolling pipeline butterfly valves, and relates to the technical field of cold rolling production process monitoring, the system comprises a filtering tank, a plurality of oil outlet butterfly valves, a liquid level detection unit and a control module, the liquid level detection unit is arranged in the filtering tank and is used for collecting liquid level data of rolling oil in real time; the control module is used for calculating a speed curve of the liquid level changing along with time based on the liquid level data, comparing the liquid level descending speed with a preset speed threshold value so as to judge the operation state of the multiple oil outlet butterfly valves and outputting corresponding multi-stage early warning information; according to the invention, single-valve-level accurate detection can be realized, unfiltered rolling oil is prevented from entering the oil cleaning tank, the defect rate of spot marks on the surface of a steel coil is reduced, the qualification rate of cold-rolled products is improved, meanwhile, the manual inspection cost is reduced, and the system intelligence and maintenance convenience are improved; the technical problems of limited adaptive scene, accurate detection, information distortion, misjudgment risk and lack of an automatic early warning mechanism in the existing early warning technology are solved.

The utility model relates to the field of butterfly valves, and discloses a low-torque soft sealing butterfly valve which comprises a valve body, the top end of the valve body is fixedly connected with a fixing rod, the top end of the fixing rod is fixedly connected with a supporting plate, the top end of the supporting plate is fixedly connected with a box body, and the inner wall of the box body is connected with a worm used for reducing torque through a rotating piece. The rear end of the worm is fixedly connected with a rotating assembly, the right end of the worm is in meshed connection with a worm gear used for reducing torque, the inner wall of the worm gear is connected with an elastic piece used for sealing through an opening and closing assembly, and the inner wall of the valve body is fixedly connected with a valve seat. According to the butterfly valve, the rotating disc is rotated, the worm is driven to rotate through the rotating rod, the worm gear can be driven to rotate, the butterfly plate is driven to open and close the valve body through the valve rod when the worm gear rotates, and when the valve body is opened and closed, due to the fact that the elastic piece is elastic, when the butterfly plate rotates, the elastic piece is not prone to falling off. The top and the bottom of the elastic piece can be slightly deformed according to the shape in the valve seat.