1889 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 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.

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 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.

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 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 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.

The invention provides an intelligent grouting system for a water conservancy project and a control algorithm, and the system comprises a control cabinet which is internally integrated with at least two independent grouting pipelines; the control module is used for mode selection, parameter input, state display and instruction issuing; the data acquisition module is used for acquiring grouting data of a grouting pipeline and transmitting the grouting data to the control module, and the grouting data comprises pressure, flow and internal slurry density data; the execution module comprises a stop valve used for controlling on-off of grout in the grouting pipeline and a flow adjusting valve used for controlling the flow in the grouting pipeline. The control module comprises a function selection unit which is used for responding to user operation and switching among three working modes of drilling flushing, water pressing testing and grouting; the parameter input unit is configured with a standardized parameter input interface and has a parameter storing and calling function; according to the invention, the control precision and efficiency can be obviously improved.

The invention discloses a corrugated pipe stop valve with a backflow preventing structure and a using method, and relates to the technical field of stop valves. The flanges are mounted at the two ends of the valve body and used for connecting the valve body with an external pipeline; the transmission mechanism is installed at the top of the valve body and used for controlling the valve body internal assembly and controlling the medium circulation channel to be opened and closed by being matched with the valve body internal assembly; when the valve needs to be closed, an operator rotates the hand wheel, the pressing block moves downwards and then makes contact with the top of the upper valve seat, the upper valve seat is pressed tightly, and therefore fixed closing of the upper valve seat is achieved. Meanwhile, the first threaded rod moves upwards in the pressing block to drive the lower valve seat to move upwards, and the bottom of the communicating groove is sealed; through the linkage mechanism, simultaneous sealing of the bottom and the top of the communicating groove is achieved, double-sealing guarantee is provided for the valve, and the sealing performance and reliability of the valve are remarkably improved.

The invention provides a vehicle fuel leakage detection method, device, system and equipment and a vehicle. In the method, when an ECU (Electronic Control Unit) monitors that a preset leakage detection condition is met during the driving of a vehicle, travel route traffic information of the travel is obtained; determining whether a preset detection duration condition is established or not according to the travel route traffic information; and if it is determined that the preset detection duration condition is met, fuel leakage detection is conducted through a fuel tank stop valve, a pressure sensor, a carbon tank desorption valve, a carbon tank stop valve and an engine. According to the scheme, in the vehicle driving process, fuel oil leakage detection is achieved according to the travel route traffic information, vehicle power-off and manual detection are not needed, and the detection efficiency is improved.

The utility model provides an electric stop valve which comprises a valve body component and a driving component, the valve body component comprises a valve seat and a valve core structure rotatably arranged in the valve seat, a valve port is arranged in the valve seat, the valve core structure opens and closes the valve port through rotation, the driving component comprises a driving shell, the driving shell is welded with the valve seat, and the driving component drives the valve core structure to rotate. According to the scheme, the valve element structure is arranged in the valve seat, the driving component drives the valve element structure to rotate, and therefore opening and closing of the valve port are achieved. According to the scheme, the valve seat in the valve body part and the driving shell in the driving part are directly connected in a welding mode, and compared with the mode that direct connection is conducted through threads or indirect connection is conducted through other shell structures, the direct welding mode is good in sealing performance, the leakage risk is reduced, implementation is easy, and the manufacturing cost is low.

The utility model discloses a stop valve sealing structure which comprises a valve body, a mounting hole, a liquid inlet hole and a liquid outlet hole which are communicated with one another are formed in the top and the two ends of the valve body respectively, a valve cover is mounted at the upper end of the mounting hole, a valve rod is arranged on the valve cover, the valve rod penetrates through the valve cover and extends into the valve body, and the liquid inlet hole is communicated with the liquid outlet hole. An external thread is arranged on the upper portion of a rod body of the valve rod, a connecting disc is connected to the valve rod in a threaded mode, the connecting disc is fixedly connected with the valve deck through a plurality of screws, a sealing cylinder is arranged at the joint of the liquid inlet hole and the liquid outlet hole and is coaxial with the valve rod, and a sealing assembly is arranged at the lower end of the valve rod. The sealing assembly comprises a first valve element and a second valve element, the first valve element and the second valve element can be matched with the sealing cylinder to form double sealing structures with different properties, and the sealing performance of the sealing assembly and the applicability to different circulating media are improved.

The utility model relates to the technical field of electric stop valve detection, and discloses an electric stop valve high-efficiency detection device which comprises a rack, one side of the rack is provided with a conveying belt, the upper end of the conveying belt is provided with a base, the base is internally provided with a clamping assembly, the upper end of the clamping assembly is provided with an electric stop valve, and the upper end of the clamping assembly is provided with a clamping assembly. Pipelines are arranged on the two sides of the electric stop valve, and a detection assembly is installed on one side of the rack; the clamping assembly comprises a motor, a lead screw is installed at the output end of the motor, and the outer side of the lead screw is sleeved with a moving block. The clamping assembly is matched with the conveying belt, the electric stop valve is stably and accurately conveyed to a detection position for detection operation, the detection precision is guaranteed while the automation performance is improved, the performance of the electric stop valve is automatically detected through the detection assembly, and the detection efficiency is improved to a certain extent.

The invention discloses a sweet material atomization test platform material liquid feeding device, a control system and a control method. The device comprises a fragrant sugar feed liquid storage unit and a pipeline feeding system, a feed liquid tank body of the fragrant sugar feed liquid storage unit is communicated with a pipeline of the pipeline feeding system; the pneumatic stop valve, the density sensor, the viscometer and the gear pump are sequentially mounted on a liquid conveying pipe at the lower end of the sweet material liquid storage unit, the gear pump is connected with the spray head through the liquid conveying pipe, a flow controller is arranged on the liquid conveying pipe, and a return pipe is arranged at the upper ends of the liquid conveying pipe and the sweet material liquid storage unit; the control system comprises a control module and an operation adjusting module, the control module and the operation adjusting module are configured in a touch screen computer, and the touch screen computer is internally provided with a high-speed camera data interface and connected with the high-speed camera to collect the droplet particle size distribution state; the automation level of the device is improved, the research and development period is shortened, and the device has the application potential of expanding to other tobacco processing and research fields.

An internal combustion engine includes a fuel tank, a fuel injection valve, a fuel passage, a shut-off valve disposed in the fuel passage, and a pressure sensor that detects a passage fuel pressure that is a pressure of fuel in a portion of the fuel passage between the shut-off valve and the fuel injection valve. The controller outputs a valve closing signal to the shut-off valve, and executes a determination process of determining whether the shut-off valve is stuck open based on a decrease amount of the passage fuel pressure that occurs until an elapsed period after the valve closing signal is output reaches a predetermined specified period. The controller excludes, from the elapsed period, a period in which a fuel cutoff process for stopping fuel injection by the fuel injection valve during operation of the internal combustion engine is executed.

The utility model discloses a control device capable of adjusting hanging height through flow. The control device comprises a posture controller, a hanging control box, a flow meter, a stop valve and a hanging executing mechanism. The suspension actuating mechanism comprises a pneumoelectric valve, an electromagnetic directional valve, a power cylinder and a pressure accumulator, the high-pressure air source is connected with the power cylinder through the pneumoelectric valve, the hydraulic source is connected with the power cylinder after sequentially passing through the electromagnetic directional valve, the stop valve, the flowmeter and the pressure accumulator, and the posture controller is electrically connected with the pneumoelectric valve, the electromagnetic directional valve and the suspension control box. The suspension control box is electrically connected with the stop valve and the flow valve. The suspension device of the special vehicle solves the problem that a driver is inconvenient to operate when the vehicle normally lands ashore or lands a naval vessel due to the fact that the suspension device of the existing special vehicle cannot feed back position information during adjustment, and the use safety is improved; meanwhile, preset height adjustment of the vehicle suspension device is achieved, then preset adjustment of the distance between the vehicle bottom and the ground is achieved, and the operation difficulty of a driver is lowered.

The invention relates to a variable topology heat management method for overcharge of a vehicle pile cooperative heavy truck, and solves the problem that refrigeration of a cooling unit matched with a current vehicle cannot meet high-rate overcharge of a battery. Comprising two three-way valves, a compensation water tank, a water supplementing stop valve, an exhaust stop valve and a liquid cooling socket, the battery cooling system is divided into an on-vehicle liquid cooling loop and an off-vehicle liquid cooling loop by controlling the states of the two three-way valves, a first opening of each three-way valve is connected with a cooling unit, a second opening of each three-way valve is connected with a battery, and a third opening of each three-way valve is connected with the liquid cooling socket, cooling liquid flows back to the cooling unit after flowing through the three-way valve I; after the three-way valve II is arranged behind the water outlet of the cooling unit, the cooling liquid flows through the three-way valve II after flowing out of the cooling unit; the compensation water tank is arranged at the highest point of the whole cooling system, the water supplementing stop valve is arranged in the water supplementing loop, and the exhaust stop valve is arranged in the exhaust pipeline. And the liquid cooling socket is arranged between the two three-way valves. According to the invention, high-rate charging of the vehicle can be realized.

The present invention relates to the technical field of oil-water separation, and particularly discloses an oil-water separation system, which comprises: a submersible pump configured to pump oil-containing sewage; an inlet of the solid-liquid separator is communicated with an outlet of the submersible pump; the oil-water separation equipment comprises a mother pipe communicated with an oil-water outlet of the solid-liquid separator, a plurality of oil-water separation units and a connecting pipe, and each oil-water separation unit comprises a liquid inlet pipe, a first stop valve mounted on the liquid inlet pipe, an oil-water separator, a liquid outlet pipe and a second stop valve mounted on the liquid outlet pipe; inlets of the oil-water separators are communicated with an outlet of the main pipe through liquid inlet pipes, water outlets of the oil-water separators are communicated with the liquid outlet pipes, the connecting pipes are used for communicating two adjacent oil-water separators, and third stop valves are mounted on the connecting pipes. According to the oil-water separation system, the oil-water separation paths of the multiple water separation units are controlled, so that the separation requirements of different scenes can be met.

The invention relates to the technical field of digital twinning, and particularly discloses a digital twinning-based stop valve intelligent control method, which comprises the following steps that a digital twinning model of a pipe network system is decomposed into a plurality of sub-models, and each sub-model corresponds to a stop valve and a corresponding associated pipe network area; monitoring data of a single stop valve are obtained, the monitoring data are transmitted to the corresponding sub-model, and the sub-model updates the model state according to the monitoring data; exchanging monitoring data among the sub-models to form a global data set, and calculating the opening degree adjustment amount of the stop valve based on the sub-models with updated model states and the global data set; and the opening degree adjustment amount is sent to a stop valve actuator, and the actuator drives the stop valve to act. According to the method, the overall hydraulic coupling state of the pipe network is sensed by dividing associated areas and exchanging data; and pressure fluctuation and hydraulic unbalance are effectively inhibited based on cooperative calculation of the valve opening adjustment amount.

The invention relates to the technical field of stop valve assembly, in particular to an automatic assembly system of a stop valve and a working method of the automatic assembly system, and the system comprises a workbench, and a first feeding device, a second feeding device and a pressing device which are arranged on the workbench. During working, the pressing device rotates through the first linkage piece to drive the push rod to horizontally push the side flow pipe to the position of the mounting hole, and the vertical sliding piece is linked to jack the passive pin to trigger the pressure cone to perform downward pressing action, so that the side flow pipe is pressed into the main flow pipe. Then, when the welding device transfers the assembly to the rotating seat through the clamping cylinder, the second linkage piece converts the horizontal displacement of the movable seat into the vertical movement of the lifting seat, so that the side flow pipe located on the rotating seat is automatically pressed and fixed by the positioning cone of the lifting seat, and then the rotating seat drives the assembly to rotate; and the seam girth welding of the main flow pipe and the side flow pipe is completed by cooperating with a welding gun. According to the whole system, the production efficiency is effectively improved by achieving full-process automation of pipe fitting feeding, pipe fitting assembling and pre-fixing and welding forming.

The invention discloses a biomass gas heat pump system and a control method thereof. According to the method, a generator set part and a heat pump unit part are included; the electricity output end of the generator set part is connected with the electricity input end of the heat pump set part; the generator set part comprises a generator set, a radiator, a stop valve, a cylinder sleeve water heat exchanger and a flue gas waste heat recoverer; the heat pump unit part comprises a compressor, an oil separator, a four-way valve, a condenser, an electronic expansion valve, an evaporator and a gas-liquid separator; the system has two operation modes, namely refrigeration operation and heating operation, and can recover engine flue gas waste heat and cylinder sleeve water waste heat during heating, so that the heating capacity is large, and the heating energy efficiency is high. During refrigeration, flue gas waste heat and cylinder sleeve water waste heat need to be discharged into air, and only the heat pump unit supplies cold. According to the system, biomass gas serves as driving energy to drive the generator to operate, energy distribution of the generator set and the heat pump is adjusted in good time by reasonably utilizing engine cylinder sleeve water waste heat and smoke waste heat, and the primary energy utilization rate of the whole machine is increased.

The blast furnace front oxygen enrichment system comprises a low-pressure oxygen pipeline laid between an oxygen station and an iron making plant, the low-pressure oxygen pipeline is connected with a blast furnace blower through an oxygen branch pipe, an air outlet of the blast furnace blower is communicated with an air inlet of a blast furnace, and the oxygen branch pipe is provided with a flame arrester and a second manual stop valve. A security nitrogen pipe is connected between the flame arrester and the second manual cut-off valve, and a stop valve, a nitrogen buffer tank and a nitrogen quick cut-off valve are sequentially arranged on the security nitrogen pipe in the airflow direction; the oxygen analyzer monitors the oxygen content in the oxygen branch pipe in real time and transmits a monitored value to the PLC, the PLC judges whether the oxygen enrichment rate of a preset instruction is reached or not, and the flow regulating valve is regulated through the PLC; the system is simple in structure, reasonable in design, convenient to implement, capable of being effectively applied to blast furnace smelting, capable of saving electric energy and production cost, good in using effect and convenient to popularize and use.

The invention provides a vehicle fuel oil leakage detection system, a vehicle fuel oil leakage detection method and a vehicle, the vehicle fuel oil leakage detection system comprises a control assembly and an ECU, and the control assembly comprises an oil tank stop valve, a pressure sensor, a carbon tank desorption valve and a one-way controllable air pump. The fuel tank stop valve is installed in a connecting pipeline of the fuel tank and the carbon tank, the carbon tank desorption valve is installed in a connecting pipeline of the carbon tank and the engine, the one-way controllable air pump is installed on a ventilation pipe of the carbon tank, and the pressure sensor is installed in the fuel evaporation system. The ECU is used for detecting the control assembly when monitoring that a preset leakage detection condition is met, and generating an available detection result indicating whether the control assembly is available or not; if the available detection result indicates that the control assembly is available, leakage detection is conducted on the fuel evaporation system by controlling the control assembly. According to the scheme, the vehicle fuel oil leakage detection system is constructed, the ECU is adopted to carry out leakage detection on the fuel oil evaporation system, manual detection is not needed, and the detection efficiency is improved.

The invention discloses a gas pressure digital monitoring device and monitoring method for power equipment, and relates to the technical field of power equipment monitoring. The device comprises a valve body, a monitoring unit, a pressure adjusting unit, a gas pressure sensing terminal, a gas temperature sensing terminal, a first switch module, a second switch module and a stop valve. The valve body is provided with a first valve element, a second valve element, a first stop block, a second support block, an inter-valve connecting rod, a push rod and a push mechanism. A first port, a second port and a third port are formed in the surface of the valve body. The first valve element and the second valve element slide in the valve body to achieve switching of various communication positions of a first port and a third port in the surface of the valve body, and a proper closed space is provided for self-checking of a device signal output node. The monitoring unit obtains the gas pressure and temperature collected by the gas pressure sensing terminal and the gas temperature sensing terminal, completes comparison and verification of the terminals, and gives an alarm when high and low pressure, early leakage and mixing ratio abnormity of the gas are diagnosed; the device integrates the functions of high-precision measurement, state diagnosis, self-inspection and the like, the device is free of maintenance, the operation and maintenance efficiency is greatly improved, and the production cost is reduced.