2728 results about "Globe valve" patented technology

The invention relates to the field of sealing detection, in particular to a high-pressure stop valve body sealing performance detection device which comprises a detection box body used for placing a valve body for observation and comprising a water tank, the water tank is arranged to be a U-shaped groove with an upward opening, and the bottom of the side of the water tank is fixedly connected with a mounting plate. An outer electric push rod is mounted at the top of the mounting plate; and the supporting assembly is arranged in the water tank, is used for bearing the valve body and comprises a cross beam, and limiting sliding rails are arranged on the two sides of the cross beam. Through cooperation of the first plugging assembly, the second plugging assembly and the supporting assembly, external bubble interference can be effectively avoided, two-way pressure detection is supported, and the detection accuracy and automation level are improved, so that the problems that in the prior art, in the detection process, non-leakage bubbles are generated, judgment of detection personnel is interfered, and the detection efficiency is improved are solved. And false detection or missing detection is caused. And due to limitation of one-way detection, the sealing performance of the valve body in a two-way pressure-bearing state is difficult to comprehensively evaluate.

The invention discloses a stop valve, and relates to the field of valves. A stop valve comprises a valve seat, a valve cover, a support, a lead screw and a sealing valve column, the liquid inlet end and the liquid outlet end of the valve seat are fixedly connected with liquid conveying pipelines on the two sides through flange plates and bolts respectively, the valve cover is fixedly installed on the valve seat through bolts, the support is fixedly installed on the valve cover, the sealing valve column is arranged in the valve seat, and the lead screw is fixedly installed on the support. The lead screw is fixedly connected to the upper end of the sealing valve column, the upper end of the lead screw upwards penetrates through the valve cover, and the double-opening sleeve is rotationally connected to the support; the operation difficulty of resisting fluid pressure when the valve is opened manually is effectively reduced, the downward pressure of fluid becomes assistance during closing, a worker only needs to reversely rotate the rotating wheel to achieve smooth downward movement of the sealing valve column, operation is convenient and fast, tighter sealing can be achieved through the fluid pressure, and the reliability after the valve is closed is improved.

The invention discloses a novel precise ammonia spraying control system for an SNCR (selective non-catalytic reduction) denitration system. The system comprises an original pipeline, a newly added pipeline, a partitioned solution mother pipe, a first connecting pipe, a main stop valve, a first stop valve and partitioned solution branch mother pipes, a partition solution mother pipe is connected to the newly added pipeline, a main stop valve, a first stop valve and a second stop valve are arranged in the partition solution mother pipe, and the main stop valve is connected with the first stop valve and the second stop valve in parallel; according to the device, a modular design is adopted, dual improvement of denitration accuracy and stability is achieved through monitoring system reconstruction and control logic optimization, on one hand, a closed-loop control system with partition real-time monitoring, trend pre-judgment and hierarchical quantity control is constructed, flue gas analyzers and sampling point probes are arranged at inlets of the three types of cyclone separators respectively, and on the other hand, the flue gas analyzers and the sampling point probes are arranged on the other sides of the three types of cyclone separators respectively; the NOx concentration of the original flue gas of each partition is collected in real time and synchronously passes through a data collection chip arranged in the partition NOx storage early warning device.

The embodiment of the invention provides stop valve machining drilling equipment and a method thereof, and relates to the technical field of stop valve machining. Stop valve machining and drilling equipment comprises a drilling table and a material storage box on the side of the drilling table, movable drilling mechanisms are installed on the two sides of the upper end of the drilling table, a valve body positioning mechanism is installed on the portion, between the two movable drilling mechanisms, of the drilling table, and an auxiliary positioning assembly is installed on the other side of the drilling table. The auxiliary positioning assembly is matched with the valve body positioning mechanism and used for clamping and auxiliary fixing of the valve body, so that the two movable drilling mechanisms can synchronously conduct drilling operation on machining parts at the two ends of the valve body. The movable drilling mechanism has the adjusting functions including height adjustment and horizontal displacement, and it is ensured that a drill bit can be accurately aligned with the position needing drilling. The gear motor drives the gear transmission system to drive the drill bits on the two sides to rotate synchronously, simultaneous drilling of the two ends of the stop valve is achieved, and the machining efficiency is greatly improved.

The invention relates to a flowing medium packed bed energy storage system which comprises a storage tank for storing flowing media, the storage tank is connected with a flowing medium loop through a stop valve, the flowing medium loop comprises a flowing medium pump, a heater, a heat accumulator module and a heat exchanger which are sequentially connected through a pipeline, and the flowing medium pump provides power for flowing medium circulation; the heat accumulator module is composed of a plurality of heat accumulator units, and each heat accumulator unit is filled with a solid material. In the heat storage mode, the heater heats the flowing medium from the low-temperature state to the high-temperature state, and then the solid materials filled in the heat storage body units are heated through the heat storage body units. In the heat release mode, the flowing medium is heated from a low-temperature state to a high-temperature state after flowing through the high-temperature solid material, and then heat is released to an external system through the heat exchanger. Efficient heat exchange between a flowing medium and a solid material is achieved through the modular solid filling design, so that the heat storage efficiency of the whole system is improved, and the adaptability and flexibility of the system are enhanced.

The invention discloses a high-temperature supercritical carbon dioxide steady-state jet flow experiment device and method, and the device comprises a liquid storage tank, a liquid booster pump, a plunger pump, a first mass flow meter, a second mass flow meter, a heating section, a first electric control valve, a first-stage cooler, a second-stage condenser, a back pressure valve, and a main loop system composed of related pipe fittings and equipment. The gas supply system consists of a carbon dioxide gas cylinder group, a gas storage tank, a gas booster pump and related pipe fittings and equipment; and the jet experiment section consists of a spray pipe, a second electric control valve, an electric stop valve and related pipe fittings and equipment. The invention further provides an experimental method of the device. According to the invention, the steady-state jet flow experiment research of supercritical carbon dioxide under the high-temperature condition can be realized.

The invention provides a multiphase hydrogen fuel flow and pressure cooperative control system, and belongs to the technical field of aero-engines, the multiphase hydrogen fuel flow and pressure cooperative control system comprises a liquid hydrogen tank, a liquid hydrogen pump, a heat exchanger, a pressure stabilizing valve, a regulating valve, a stop valve, a sensor and an engine main controller, the engine main controller receives engine state feedback and outputs a hydrogen fuel mass flow instruction; the pressure maintaining valve outlet pressure instruction calculation module and the pressure maintaining valve pressure closed-loop control module are arranged between the pressure maintaining valve and the engine, and the liquid hydrogen pump outlet pressure instruction calculation module and the liquid hydrogen pump outlet pressure compensation control module are arranged between the liquid hydrogen pump and the engine. The regulating valve outlet flow lead correction control module is arranged between the regulating valve and the engine; according to the scheme, the rotating speed of the liquid hydrogen pump, the opening area of the pressure maintaining valve and the opening area of the adjusting valve are cooperatively controlled, flow and pressure dynamic matching of the hydrogen fuel adjusting system under the non-stable working condition is achieved, and the flow control dynamic response performance of the hydrogen fuel adjusting system is improved.

The utility model provides a test support device mass balancing driving system and a flow field test system. The test support device mass balancing driving system comprises an oil transportation header pipe, two oil transportation branch pipes and an oil return header pipe, each oil conveying branch pipe is connected with the oil conveying main pipe through a first stop valve, and a second energy accumulator is connected to each oil conveying branch pipe; outlets of the two oil conveying branch pipes are respectively communicated with two oil cavities of the hydraulic cylinder; one oil conveying branch pipe is connected with an overflow valve, the overflow valve is connected with the oil return header pipe through a first oil return branch pipe, the other oil conveying branch pipe is connected with the oil return header pipe through a second oil return branch pipe, and a second stop valve is arranged on the second oil return branch pipe. The balancing of the mass of the test model supporting part in the sinking and floating movement process of the flow field test can be realized, and the mass of the test model supporting part does not influence the model test. In addition, by adjusting the pressure of the balance energy accumulator, namely adjusting the pressure of the second energy accumulator, the frequency of balancing motion can be achieved, and broadband quality balancing from low frequency to high frequency can be achieved.

The invention provides a flow field analysis method capable of optimizing an anti-blocking adjusting stop valve structure, and belongs to the technical field of stop valves, and the method comprises the following steps: S1, based on an energy minimum multi-scale model, dividing each phase medium into a dense phase and a dilute phase through calculation of each phase distribution in each region in a valve; s2, correcting an inter-phase momentum transfer resistance relationship of the liquid-solid two-phase quasi-fluid model, and establishing a mass transfer and drag action relationship between a dilute phase and a dense phase to form a first-stage model; s3, performing medium serialization on the physical image of the first-stage model to form a single dilute phase and a single concentrated phase, establishing a mass exchange and drag action relationship between the dilute phase and the concentrated phase, ensuring that the concentrated phase and the dilute phase meet mass conservation, and constructing a second-stage model; according to the method, the defects of homogeneous hypothesis are corrected through the multi-stage model, the influence of particle aggregation on flow can be reflected, liquid-solid two-phase flow simulation is closer to the actual working condition, and the prediction error of the erosion risk area is greatly reduced.

The utility model belongs to the technical field of inflatable boats, and discloses a high-pressure rapid inflation system for an inflatable boat and the inflatable boat. The inflation system is applied to the inflatable boat, in the process of throwing the inflatable boat to the sea surface, the stop valve is triggered to open the first air supply pipeline, high-pressure air in the high-pressure air cylinder is released instantly, and the high-pressure air is conveyed to a boat body of the inflatable boat through the first air supply pipeline, a first air inlet connector of the diverter valve, an air outlet connector of the diverter valve and the inflation pipeline; the boat body of the inflatable boat can be quickly filled with air, so that the time is greatly shortened, and the rescue efficiency is improved; the inflatable boat basically floats on the sea surface after being launched, and the requirements for water tightness and air inlet design of the electric air supplementing pump part are low; the pressure transmitter monitors the gas pressure in real time, and when the pressure of the air chamber of the inflatable boat body is lower than a set value, the control unit triggers the electric air supplementing pump to start to supplement air to the air chamber of the boat body of the inflatable boat through the second air supply pipeline, the second air inlet connector of the diverter valve, the air outlet connector of the diverter valve and the inflation pipeline.

The invention discloses a multistage closed-loop recovery method and system for industrial flue gas waste heat, and particularly relates to the technical field of waste heat recovery. The method comprises the following steps: predicting a process steam demand through a high-temperature section temperature parameter in flue gas monitoring data, and predicting a preheating medium demand based on a low-temperature section temperature parameter in the flue gas monitoring data; inputting the high-temperature-section demand prediction result and the low-temperature-section demand prediction result into a dynamic heat balance equation, calculating an optimized set point of a three-stage compressor unit, and adjusting the rotating speeds of a centrifugal compressor, a screw compressor and a scroll compressor by adopting a fuzzy PID (Proportion Integration Differentiation) algorithm; collecting temperature and flow data of secondary waste heat after the industrial equipment is reused, and generating secondary waste heat monitoring data; according to a compressor adjusting instruction and secondary waste heat monitoring data, the real-time opening degrees of the two-way stop valve and the electric adjusting valve are controlled, backflow of secondary waste heat to the interstage heat exchanger set is achieved, closed-loop recycling of industrial flue gas waste heat is completed through countercurrent flow heat exchange, and the waste heat recycling efficiency and the system stability are improved.

Shut-off valves for cryogenic fluids are disclosed herein. An example valve includes a valve body defining a flow path and a valve seat, a bonnet coupled to the valve body and defining a bonnet chamber, a plug, and a stem coupled to the plug. The stem is configured to slide to cause the plug to slide. The valve includes a spindle that includes external threads. The spindle is configured to move along a longitudinal axis of the bonnet as the spindle is rotated about the longitudinal axis via the external threads to cause the stem to slide linearly along the longitudinal axis. The valve includes a pivot ball positioned between and operatively coupled to the stem and the spindle. The pivot ball is configured to translate linear and rotational movement of the spindle into linear movement of the stem and the plug.

The utility model discloses a stop valve leak detection tool which comprises an operation table and a stop valve body, a fixed box is fixedly installed on the right side of the top of the operation table, a sliding box is connected to the left end of the top of the operation table in a sliding mode, and a plurality of liquid outlet pipes are symmetrically installed on the opposite sides of the fixed box and the sliding box. The liquid outlet pipe is communicated with an inner cavity of the fixed box and an inner cavity of the sliding box, a plurality of stop valve supporting blocks are arranged between the sliding box and the fixed box, and the stop valve supporting blocks slide on the top of the operation table. The stop valve body is placed on the top of the stop valve supporting block, the liquid outlet pipe is connected with the stop valve body through sliding of the sliding box, the bright color leakage detection liquid is injected into the inner cavity of the stop valve body through the water pump, and whether the surface of the stop valve body leaks or not is observed so that the sealing performance of the stop valve body can be judged. The leak detection tool is simple in operation, can carry out leak detection operation on a plurality of stop valve bodies at the same time, and improves the efficiency.

The invention discloses a multi-stage buffering toughness stop valve, relates to the technical field of valves, and aims to solve the problem that an existing valve cannot effectively relieve the impact of fluid on a valve element. A valve element of the stop valve is mainly composed of an outer valve element body, a middle valve element body and an inner valve element body, the inner valve element body is arranged in an element cavity defined by the outer valve element body and the middle valve element body in an axial moving mode, an elastic assembly is arranged between the inner valve element body and the inner end wall face of the element cavity, and therefore when fluid impacts the valve element, the valve element is not damaged. The fluid flowing into the core cavity can drive the inner valve element to move axially and extrude the elastic assembly, part of kinetic energy of the fluid is converted into elastic potential energy of the elastic assembly, the impact effect of the fluid on the valve element is relieved, particularly transient impact caused by fluid flow speed changes is relieved, the service life of the valve element is prolonged, and the reliability of the valve element is improved. Moreover, the internal cavity channel of the valve core of the stop valve can reduce the flow speed of the fluid and improve the flowing stability of the fluid, so that the impact of the fluid on the valve core is further relieved.

The invention relates to a multifunctional integrated liquid cooling plate testing machine which comprises a cabinet body, a testing inlet pipe and a testing outlet pipe which are used for being connected with a liquid cooling plate are arranged on the cabinet body, a pure water tank and a nitrogen cylinder are arranged in the cabinet body, a first liquid outlet and a first liquid return opening are formed in the pure water tank, the first liquid outlet is communicated with the testing inlet pipe through a first pipeline, and the first liquid return opening is communicated with the testing outlet pipe through a second pipeline. The first liquid return port is communicated with the test outlet pipe through a second pipeline, the first pipeline is provided with a variable frequency circulating pump, the nitrogen cylinder is communicated with a third pipeline, the third pipeline is connected with the first pipeline through a first stop valve, the first stop valve is communicated with a fourth pipeline, and the fourth pipeline is connected with the second pipeline through a first three-way valve. The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are provided with a cleanliness testing assembly, a thermal resistance testing assembly and an air tightness testing assembly. The liquid cooling plate testing device has the effect of realizing integrated testing of the liquid cooling plate.

The utility model discloses a liquid return impact experiment device for a low-pressure cavity scroll compressor, and relates to the technical field of experiment equipment, in particular to the liquid return impact experiment device for the low-pressure cavity scroll compressor. One end of a first stop valve is connected with an exhaust pipeline of a tested compressor, and the other end of the first stop valve is connected with an inlet of a gas-liquid separator; an outlet of the gas-liquid separator is connected with a second stop valve; the second stop valve is connected with the electronic expansion valve through an electronic expansion valve pipeline; the electronic expansion valve pipeline is connected with a bypass pipeline in parallel, and a third stop valve is arranged on the bypass pipeline; an outlet of the electronic expansion valve is connected with a fourth stop valve; the fourth stop valve is connected with the liquid sight glass; and the liquid sight glass is connected with an air suction pipeline of the tested compressor. According to the technical scheme, the problems that an existing compressor glow test device in the prior art is complex, whether liquid returns or not is not easily judged, the experimental period is long, and the overall liquid impact resistance of the compressor cannot be rapidly and accurately evaluated are solved.

A fuel supply device for an internal combustion engine includes a tank, a fuel injection valve, a fuel passage, a second shut-off valve to open and close the fuel passage, a variable volume mechanism configured to vary the volume of a downstream-side fuel passage, which is a section of the fuel passage that is connected to a downstream side of the electromagnetic valve, and a controller that executes a fuel pressure control. In the fuel pressure control, the second shut-off valve is repeatedly opened and closed such that the fuel pressure in the downstream-side fuel passage falls within a range defined by an upper limit value and a lower limit value. The controller executes a volume increasing process that operates the variable volume mechanism to increase the volume of the downstream-side fuel passage during the execution of the fuel pressure control.

The invention relates to the technical field of wafer processing, and provides a warped wafer vacuum adsorption film tearing platform, which comprises an elastic suction cup, an edge vacuum adsorption groove, a warped suction cup body and a vacuum stop valve, and is characterized in that the elastic suction cup is mounted on the warped suction cup body and is used for carrying out self-adaptive first adsorption according to the warped shape of a wafer; the edge vacuum adsorption groove is formed in the position, close to the edge of the wafer, of the warping suction cup body and used for adsorbing the edge of the wafer for the second time when the film tearing mechanism compresses the wafer, and a path of vacuum air source is arranged on the warping suction cup body. The elastic suction cup can perform self-adaptive deformation according to the warping shape of the wafer, and when the warping wafer is placed on the platform, the elastic suction cup is quickly attached to the concave-convex contour of the surface of the wafer to form a good sealed space, so that the vacuum leakage phenomenon is effectively avoided, and it is ensured that the wafer is always kept stable in the operation process.

The invention discloses a pneumatic stop valve, belongs to the technical field of valves, and solves the problems that when the pneumatic stop valve acts once per minute at the temperature of 380 DEG C, a valve rod is oxidized and collapsed due to high-temperature filler, the valve rod is abraded by catalyst particles, the valve rod is slightly bent by 0.08 mm due to the pressure difference of 0.5 MPa, sealing and hiding of the valve rod are invalid, and closing lags. Comprising a valve body, a support installed on the valve body through a valve cover, a corrugated pipe fixedly connected into the support, a pneumatic actuator fixedly connected to the upper end of the support and a valve rod, the valve rod is connected into the corrugated pipe in a sliding mode, and the upper end of the valve rod is in transmission connection with the movable end of the pneumatic actuator. All the structures keep efficient sealing, the displacement direction of all the structures is limited, meanwhile, the displacement and strain data of the valve rod are monitored, the bending amount is calculated through multi-source data fusion for position compensation, and meanwhile the pneumatic execution module is controlled to complete S-curve optimized valve opening and closing actions.

A fuel supply device for an internal combustion engine includes a tank that stores gas fuel, a fuel injection valve that supplies gas fuel to a cylinder, a fuel pipe that supplies gas fuel in the tank to the fuel injection valve, a pressure reducing valve provided downstream of the tank in the fuel pipe, a second shut-off valve as an electromagnetic valve that is provided downstream of the pressure reducing valve in the fuel pipe so as to open and close the fuel pipe, and a controller. A pressure reduced by the pressure reducing valve is defined as an outlet-side pressure. The pressure reducing valve includes a valve member that opens and closes in accordance with an increase and a decrease in the outlet-side pressure. The controller executes a valve closing process of closing the second shut-off valve when a stop condition for stopping fuel injection of the fuel injection valve is met.

The invention discloses an elastic cooling water pipe network system and a control method thereof. The elastic cooling water pipe network system comprises a water supply main pipe, a water return main pipe, a first parallel branch, a second parallel branch and a first series branch. One end of the first parallel branch is communicated with the water supply main pipe, the other end of the first parallel branch is connected with the water return main pipe, and a first adjusting valve, a first cooling water user and a first stop valve are sequentially arranged on the first parallel branch. One end of the second parallel branch is communicated with the water supply main pipe, the other end of the second parallel branch is connected with the water return main pipe, and a second adjusting valve, a second cooling water user and a second stop valve are sequentially arranged on the second parallel branch. One end of the first series branch is communicated with the first parallel branch, and the other end of the first series branch is connected with the second parallel branch. Therefore, the throttling loss of the valve under the low working condition can be effectively reduced, the power of the cooling water pump is reduced, and the requirements of multiple operation working conditions of a ship power system are met.

The invention provides a multifunctional comprehensive experimental platform and experimental method for a new working medium Brayton cycle system, and belongs to the technical field of thermal engineering experiments. The problem that an experimental device for researching unknown transient characteristics such as start / stop / power change of a new working medium Brayton cycle system, unknown transient safety characteristics under various typical accident conditions, a reliable start / stop / accident safety control strategy and composite control strategy thermal safety characteristics is lacked is solved. The device comprises a new working medium gas charging and discharging system, a Brayton cycle main loop system, a circulating cooling water system, a simulated crevasse system, a measuring instrument system and a power distribution cabinet, the simulation crevasse system comprises a first manual stop valve, a first crevasse test point, a movable crevasse eruption collecting device and the like which are located on a branch near an inlet of the temperature and pressure reducing device and connected in sequence. The device is mainly used for experimental research of the new working medium Brayton cycle system.

The utility model discloses an automatic filtering and cleaning system for bathing wastewater, which comprises a filtering water tank, a filtering net and a wastewater tank, the filtering water tank is divided into a filtering area and a non-filtering area by the filtering net, a liquid level sensor A is arranged in the non-filtering area, the outer side of the non-filtering area is connected with a bathing wastewater conveying pipe and a blow-off pipe, the blow-off pipe is provided with a stop valve D, and the stop valve D is connected with the wastewater tank. A liquid level sensor B, a submersible pump A, a cleaning nozzle A and a cleaning nozzle B are fixed in the filtering area, the cleaning nozzle A is connected with a tap water supply point pipeline, and a stop valve A is mounted on the pipeline; the submersible pump A is in pipeline connection with the waste water tank, a stop valve B is arranged on the pipeline, the cleaning nozzle B is in pipeline connection with the stop valve B, and a stop valve C is arranged on the connecting pipeline; and the liquid level sensor A, the liquid level sensor B, the stop valve A, the stop valve B, the stop valve C and the stop valve D are respectively connected with a central controller of the system.

The invention belongs to the technical field of dry ice air jet, particularly relates to a dry ice air jet generating device and method, and aims to form high-speed airflow by using compressed air and dry ice particles so as to be applied to the fields of industrial cleaning, surface treatment and the like. The main device comprises an air compressor, an air storage bottle, a high-pressure hose, a stop valve, a pressure release valve, a pressure gauge, a dry ice particle preparation system, an ejector and a self-oscillation nozzle. The method comprises the steps that the air compressor compresses air to high pressure and stores the air in the air storage bottle; the liquid carbon dioxide is pressurized and conveyed into the ice forming barrel through the plunger pump, and the liquid carbon dioxide is converted into dry ice through temperature and pressure changes; and the dry ice is cut into dry ice particles by the ultrasonic knife net. Then, the dry ice particles and compressed air are mixed in the ejector and accelerated to a high speed; and finally, spraying the mixture through a self-oscillation nozzle to form a high-speed dry ice air jet flow. By means of the method, the dry ice air jet can be efficiently and stably generated, and the method is suitable for various industrial applications such as cleaning, surface treatment and sand blasting. The device is simple in structure and convenient to operate, and has high application value.

The application provides a multi-gas control device, a use method and an application, and relates to the technical field of biological gas fermentation. The device comprises a gas supply module, the gas supply module comprises multiple groups of gas sources and connecting pipelines, each gas source is connected to an air inlet pipeline through a respective connecting pipeline, a secondary pressure reducing valve, a T-shaped filter, a mass flow meter, a stop valve, a regulating valve and a check valve are sequentially arranged on the connecting pipeline, the air inlet pipeline is connected to a liquid circulation pipeline, gas is discharged from a spraying mechanism connected to the liquid circulation pipeline, the spraying mechanism is arranged in a fermentation tank, the spraying mechanism is connected to a circulating pump through the liquid circulation pipeline, the circulating pump is connected to the bottom of the fermentation tank through a pipeline, the top of the fermentation tank is connected to a detection pipeline, and a precision filter, a vacuum pump, a drying device, a pre-analyzer and a gas analyzer are sequentially arranged on the detection pipeline. The application realizes efficient absorption and utilization of multiple gases, and simultaneously obtains high yield and high quality single-cell protein.

The invention discloses a high-precision polishing and grinding device for machining a valve element of a stop valve, and belongs to the technical field of valve element polishing machining. The high-precision polishing and grinding device comprises an equipment base placed in a workshop, a polishing motor is installed on the outer side of the equipment base through a frame body in a lifting mode, and a polishing head is fixedly installed at the output end of the polishing motor; a polishing seat is further fixedly mounted above the equipment base, a center shaft is rotatably mounted on the inner side of the upper portion of the polishing seat, the center shaft is in transmission connection with a polishing head through a linkage transmission assembly, and side shafts rotatably connected with the polishing seat are evenly arranged on the outer side of the center shaft. The center shaft and the side shafts are in transmission connection through transmission gear sets, and clamping and positioning assemblies are arranged at the tops of the side shafts. According to the high-precision polishing and grinding device for machining the valve element of the stop valve, synchronous and automatic positioning and polishing of the valve element at multiple stations can be achieved, the polishing efficiency is high, and polishing liquid and metal dust can be efficiently treated and recycled in the polishing process.

The utility model relates to the technical field of coke oven heating, in particular to an economical single-hole combustion chamber temperature adjusting device, which is characterized in that the input end of each heating gas unit I and the input end of each heating gas unit II are respectively connected with a heating gas main pipe; the output end of each first coal gas heating unit and the output end of each second coal gas heating unit are connected with the corresponding combustion chamber, one end of each adjusting unit is connected with the corresponding first coal gas heating unit, and the other end of each adjusting unit is connected with the corresponding second coal gas heating unit. The utility model has the advantages that the structure realizes the communication of the two heating gas main pipes, one regulating valve can be adopted to complete the flow regulation of the two gas heating pipes in the same combustion chamber, and the on-line maintenance and manual regulation are realized by changing the opening position of the T-shaped plug valve; the regulating valve is connected with the stop valve through the three-way connector, it is guaranteed that the regulating valve can be detached at any time when breaking down, and normal production is not affected.

The invention discloses a special bromine corrugated pipe stop valve with a sealing detection function, and relates to the technical field of stop valves, the special bromine corrugated pipe stop valve comprises a valve body, the side wall of the valve body is fixedly connected with a valve cover through a bolt, the inner wall of the valve cover is slidably connected with a valve rod, and the inner wall of the valve cover is rotatably connected with a rotating cylinder; a connecting ring plate is slidably connected to the inner wall of the rotating cylinder, and a first cleaning brush is fixedly connected to the side wall of the connecting ring plate. By installing the rotating cylinder, the connecting ring plate, the first cleaning brush and the like, the automatic cleaning function on the surface of the corrugated pipe is achieved, the problems of crystal deposition and impurity attachment on the surface of the corrugated pipe are solved, the service life of the valve is prolonged, and the sealing reliability of the valve is improved.

The present invention discloses a globe valve applicable to low-temperature media, belonging to the technical field of valves. It is a structural improvement of the globe valve for transporting low-temperature media. Refrigerant is filled in the shock-absorbing cavity corresponding to the liquid inlet of the valve body by the valve seat and inside the valve seat to keep the pressure and temperature of the liquid inlet of the valve body relatively stable, and to avoid the deformation and generation of gaps in the sealing surfaces of the valve core and valve seat due to excessive temperature changes. After the valve is started, the valve core moves upward to maintain the normal opening degree, and the telescopic buffer structure and turbine blades arranged at the upper and lower ends of the valve core are relied on to reduce the strong pressure caused by the instantaneous hydraulic pressure on the valve core. Among them, relying on the reverse air compression effect of the telescopic air distribution sleeve rod, the turbine blade moves downward. When the opening degree of the valve core is the largest, the turbine blade is close to the valve seat, and the turbine blade is driven by the low-temperature medium to rotate, thereby consuming part of the kinetic energy in the medium, and reducing the impact force of the high-speed fluid medium on the valve core and the outlet pipe fitting by passive flow limiting.

The invention relates to the technical field of high-pressure hydrogen storage of hydrogen fuel cell automobiles, and provides a high-pressure hydrogen storage bottle opening combination valve with a streamline runner and a control method. The combination valve integrates a high-pressure stop valve, a two-way flow regulating valve, a filter and a pressure / temperature / flow sensor, an air supply channel, an air inflation channel, a discharge channel and a cooling channel are designed, and the air supply channel and the air inflation channel are provided with a common rail type channel. A pilot-operated pressure reducing valve and a main runner bidirectional flow regulating valve are additionally arranged on the gas supply channel to form a two-stage pressure reducing system, so that the pressure and flow of hydrogen at an outlet are effectively limited, and the hydrogen is safely conveyed to a fuel cell; a redundant one-way valve is additionally arranged on an inflation channel to achieve rapid filling. Flow resistance and turbulent flow dissipation are remarkably reduced through a streamline channel, a sealing interface is reduced through modular integration, actuation response and power density are improved, and safety and stability of pressure reduction gas supply and high-pressure filling working conditions, intrinsic safety of the system and reliability of the whole life cycle are ensured.