386results about How to "Stable pressure" patented technology

The invention provides swimming pool cleaning equipment, and relates to the technical field of swimming pool cleaning. The swimming pool cleaning equipment comprises a base body which comprises a bottom face and a containing cavity, and a liquid inlet communicated with the containing cavity is formed in the bottom face. And the rolling brush is rotationally connected with the base body, and the rolling brush and the liquid inlet are arranged in a spaced mode in the advancing direction of the swimming pool cleaning equipment. And the turbidity detection device is arranged on the bottom surface of the base body, is positioned between the liquid inlet and the rolling brush, and is used for detecting the turbidity of the liquid. In the advancing direction of the swimming pool cleaning equipment, the distance between the turbidity detection device and the central axis of the liquid inlet is a first distance, the minimum distance between the turbidity detection device and the rotating central axis of the rolling brush is a second distance, and the first distance is larger than the second distance. According to the swimming pool cleaning equipment provided by the embodiment of the invention, the turbidity of the liquid can be accurately measured, so that the swimming pool cleaning equipment can more intelligently plan a cleaning path, key areas are ensured to be fully cleaned, unnecessary repeated cleaning is reduced, and then the cleaning efficiency is improved.

The invention relates to the technical field of earthquake detection, and discloses a constant-pressure online detection device and method for the concentration and flow of gas escaped from a hot spring, and the device comprises a gas collecting hood, a buffer bottle, a gas flow detector, a constant-volume gas storage chamber, a constant-pressure detection valve, an online gas detector and a central controller; the gas collecting hood is arranged in a corresponding area of hot spring escape gas and collects the hot spring escape gas; the gas inlet end of the surge flask is communicated with the gas collecting hood through a pipeline, and the gas outlet end is communicated with the gas inlet end of the constant-volume gas storage chamber through a gas flow detector; the constant-volume gas storage chamber is communicated with an on-line gas detector pipeline through a constant-pressure detection valve, and when the air pressure value of hot spring escape gas stored in the constant-volume gas storage chamber is larger than a preset air pressure threshold value, the hot spring escape gas enters the on-line gas detector through the constant-pressure detection valve; the on-line gas detector is used for detecting gas components and concentration of gas escaped from the hot spring and sending detection data to the central controller.

The invention discloses a natural gas supply device for an industrial furnace, which relates to the technical field of gas supply systems for industrial furnaces, and comprises an annular guide rail which is arranged at the side end of a gas inlet flow regulation and control valve pipe in a sleeving manner and is used for driving an adjusting shaft and an ultrasonic generator to be positioned at the side end of a gas inlet pipeline to carry out ultrasonic frequency emission regulation and control, under the cooperation of the oxygen-containing regulation and control assembly, the oxygen content proportion in the natural gas in the oxygen-containing conveying pipe is rapidly corrected, the precise oxygen content needed by combustion of the industrial furnace is guaranteed, super-uniform mixing of natural gas and oxygen is integrally achieved, the incomplete combustion phenomenon caused by fluctuation of the oxygen content is reduced, and the heating effect and the product quality are improved; and under the cooperation of the ultrasonic adjusting assembly, more complex pipeline impurity conditions can be treated, so that emission parameters and reflection angles of self-adaptive automatic adjustment ultrasonic waves are formed, natural gas conveying is smoother, and therefore the combustion stability and heat efficiency of the industrial furnace are improved.

The invention relates to the technical field of heat exchangers, in particular to a plate heat exchanger cleaning system, a plate heat exchanger and a cleaning method. The fluid monitoring devices are installed at an inlet and an outlet of the plate heat exchanger respectively, connected with the control device and used for monitoring fluid data of the inlet and the outlet of the plate heat exchanger and transmitting the data to the control device. The high-pressure cleaning device is arranged between plate channels of the plate heat exchanger, is connected with the control device and is used for acquiring an instruction of the control device and cleaning the plate channels of the plate heat exchanger; the control device is used for receiving the fluid data of the fluid monitoring device and generating a cleaning instruction to the high-pressure cleaning device. Real-time monitoring and a response mechanism are combined, the fluid monitoring device, the high-pressure cleaning device and the control device are combined for control, the self-cleaning function of the plate heat exchanger is achieved, and the problems that an existing plate heat exchanger is difficult to clean and low in efficiency are solved.

The utility model discloses semiconductor cleaning equipment and a liquid supplementing device thereof, and belongs to the technical field of semiconductor cleaning. The liquid supplementing device comprises a liquid storage device, a liquid supplementing pipeline, a gas supply pipeline, a control device and a pressure detection element, the liquid storage device is provided with a liquid outlet and a gas inlet, the first end of the liquid supplementing pipeline is communicated with the liquid outlet, the second end of the liquid supplementing pipeline is used for being communicated with the process tank, the gas supply pipeline is communicated with the gas inlet, and the pressure detection element is arranged on the liquid storage device. The pressure detection element is electrically connected with the control device to detect the pressure in the liquid storage device, the control device is used for controlling the flow of the gas supply pipeline, the pressure detection element is electrically connected with the control device, and the control device controls the flow of the gas supply pipeline to be reduced under the condition that the pressure detection element detects that the pressure value in the liquid storage device is larger than a first pressure value; and under the condition that the pressure detection element detects that the pressure in the liquid storage device is smaller than a first pressure value, the control device controls the flow of the gas supply pipeline to be increased. The semiconductor cleaning equipment comprises the liquid supplementing device.

The invention relates to the technical field of integrated hydraulic station systems, and discloses an integrated hydraulic station system based on intelligent control. The integrated hydraulic station system comprises an intelligent control core module, a power and transmission control module, a monitoring and feedback adjusting module, a safety and protection module, a fault diagnosis and early warning module, a network communication and remote monitoring module and a system integration and cooperation module. The intelligent control core module comprises a central controller and a data acquisition and processing unit; the power and transmission control module comprises a hydraulic pump set and a hydraulic motor; the monitoring and feedback adjusting module comprises a sensor network and a human-computer interaction interface; the safety and protection module comprises an energy accumulator, a safety valve, an overflow valve, a filter and a cooler; the network communication and remote monitoring module comprises a network communication unit and a remote monitoring platform; through the system, the working stability and reliability of the hydraulic system can be improved.

According to the fretting wear test device in the high-temperature gas environment, the double-layer test cavity capable of simulating the high-temperature gas environment is designed, high temperature, gas components and pressure conditions are adjusted through the heating unit and the gas control module, and it is ensured that the test is conducted under the condition close to the actual service condition; by loading different normal forces, high frequency and variable displacement amplitude, fretting wear behaviors in a high-temperature gas environment are simulated so as to research the wear characteristics between the sample and a wear pair, and meanwhile, high-temperature-resistant materials such as a double-layer shell structure and a high-purity alumina fiber material are adopted, so that the double-layer test cavity can bear the high-temperature environment, and the wear resistance of the sample is improved. And heat is effectively isolated to ensure operation safety. And finally, the temperature and the air pressure in the test cavity are monitored in real time through a heating piece and an external driving system, so that the temperature and the pressure in the test process are stabilized in a set range, and damage to equipment caused by overheating or overpressure is avoided.

The utility model discloses a strong brine concentration device which comprises a concentration box body, a driving motor, a main pipeline and a blanking plate, a support is arranged on the inner wall of the concentration box body, a sealed upper cover is arranged in the support, a frame is fixed at the upper end of the concentration box body, and a motor seat arranged in the middle of the frame is used for fixing the driving motor. An output shaft of the driving motor is connected with a rotating shaft, a main pipeline is fixed to the lower end of the rotating shaft, a discharging plate is installed on the rotating shaft below the main pipeline, and a vertical heating stand pipe is fixed to the upper portion of the main pipeline through a supporting frame. According to the device, uniform heating and efficient evaporation of saline water are achieved by adopting a special heating vertical pipe and a hot gas injection mode, meanwhile, the manufacturing cost and the operation difficulty of the device are reduced by optimizing the structure and the operation process of the device, and in addition, the stability and the reliability of the device during high-concentration saline water treatment are ensured by adopting a sealing technology.

The utility model discloses a carbon decomposition device for producing borax decahydrate by using high-concentration carbon dioxide. The carbon decomposition device comprises nine carbon decomposition tanks, every three carbon decomposition tanks form a group, and three groups are connected in parallel; the upper part of each carbon decomposition tank comprises a serial-in end head, a carbon dioxide main pipe end head connected with a carbon dioxide main pipe, a discharging main pipe end head connected with a discharging main pipe, a feeding main pipe end head connected with a feeding main pipe, an emptying main pipe end head connected with an emptying main pipe, a tail gas main pipe end head connected with a tail gas main pipe and a serial-out end head; in each group, the serial-in end of each carbon decomposition tank is connected with the serial-out end of the adjacent carbon decomposition tank in series; a steam header pipe end connected with a steam header pipe is arranged on the side wall of the carbon decomposition tank; a steam condensate pipe is arranged at the lower part of the carbonolysis tank. According to the utility model, three tanks are connected in series for carbon decomposition reaction, so that the fluctuation of carbon dioxide pressure during discharging is reduced, the stability of system pressure is facilitated, and the absorption and carbon decomposition reaction of carbon dioxide are facilitated.

The PEM hydrogen production cathode water recovery system comprises a gas-liquid separation tank and a water storage tank, one side of the gas-liquid separation tank is provided with an input pipeline connected with an electrolytic bath cathode outlet, and the other side of the gas-liquid separation tank is provided with a hydrogen discharging pipeline. A separation tank middle liquid level sensor and a separation tank lower liquid level sensor are arranged on the gas-liquid separation tank, the lower end of the gas-liquid separation tank is connected with an inlet in the upper end of the water storage tank through a connecting pipeline, a separation tank water outlet control valve is arranged on the connecting pipeline, and a water storage tank inlet control valve is arranged at an inlet in the upper end of the water storage tank. A water storage tank upper liquid level sensor and a water storage tank lower liquid level sensor are arranged on the water storage tank, a water return pipeline is arranged at the lower end of the water storage tank and connected with the electrolytic bath water replenishing tank, and a water return control valve is arranged on the water return pipeline. In the cathode water discharging process, the cathode outlet pressure can be kept stable, meanwhile, the pressure difference between the cathode outlet pressure and the anode is always kept within the range meeting the requirement, and therefore the pressure difference balance between the cathode and the anode can be guaranteed.

The utility model relates to the technical field of tea leaf processing, and provides a tea leaf rolling machine which is characterized in that a power rod is rotatably connected in a working table, the top of the power rod is fixedly connected with a rotating disc, the top of the rotating disc is fixedly connected with a wedge groove block, a wedge block is movably embedded in the wedge groove block, and the wedge block is fixedly connected with the rotating disc. A first threaded rod is in threaded connection with the interior of the wedge block, the outer surface of the first threaded rod is rotatably connected to one side of the wedge groove block, a rocker is fixedly connected to one end of the wedge block, an adjusting block is rotatably connected to the top of the wedge block, and two transverse rods are fixedly connected to one side of the adjusting block; and the sides, away from the adjusting blocks, of the two transverse rods are fixedly connected with a rolling cylinder, and the top of the workbench is fixedly connected with two fixing plates. According to the utility model, the device is provided with the rolling diameter adjusting structure, so that the rolling diameter and the working stroke of each rolling can be adjusted according to the variety of tea leaves, the device can be suitable for any variety of tea leaves, and the application range of the device is larger.

The invention relates to the technical field of nuclear power feed pumps, and discloses a variable-frequency and variable-speed starting feed pump for a nuclear power plant, which comprises a pump body, a driving shaft arranged in the pump body, a variable-speed motor arranged at one end of the driving shaft, an auxiliary water delivery assembly arranged on one side of the pump body, and a multi-stage impeller mechanism and an adjusting assembly arranged in the pump body, a main water inlet and a main water outlet are formed in the top of the pump body, water flow enters the front cavity from the main water inlet through the arranged auxiliary water conveying assembly and the multi-stage impeller mechanism, the speed adjusting motor runs at a low speed and drives the front impeller body and the rear impellers to rotate in the pump body through the driving shaft, and when the front impeller body rotates, the rear impellers rotate in the pump body. Water flow can be divided into two parts to be conveyed in two directions through the inner row of blades and the outer row of blades, so that the water flow and pressure are more stable, impact on key equipment is reduced, different working condition requirements are better met, and the effect of improving the stability and reliability of a system is achieved.

The invention belongs to the technical field of oil well associated gas component analysis, and discloses an oil field associated gas component wellhead online analysis system and method. The wellhead online analysis system for the oilfield associated gas components comprises a circulating suction unit, an oilfield associated gas component analysis unit, a backflow unit and a remote control unit, the circulating suction unit comprises an electric valve, a gas-liquid separation tank and a circulating pump which are connected in sequence, the oilfield associated gas component analysis unit comprises a pressure reducing valve, an electric valve and a gas component detection part which are connected in sequence, and the backflow unit comprises an accumulated liquid backflow unit and an accumulated waste gas emptying unit. The circulating suction unit, the oilfield associated gas component analysis unit and the backflow unit are arranged on a sealed sampling pipeline formed at a wellhead sampling position. According to the wellhead online analysis system for the oil field associated gas components, online detection of the oil field associated gas components is achieved, and the reliability and accuracy of online analysis are improved.

The invention relates to an air pressure test system and method, and the system comprises an inflation unit which is used for providing high-pressure air for a target chamber and is sequentially connected with an air source cylinder, a first pressure regulating device, a booster pump, a flowmeter and a second pressure regulating device, and the first pressure regulating device is used for regulating the air inlet pressure entering the booster pump; the booster pump is used for boosting gas pressure to meet the pressurizing requirement; the flow meter and the second pressure regulating device are used for regulating the flow pressure of gas entering the target chamber; the operation gas supply unit comprises an operation gas cylinder and a third pressure regulating device, is connected to the booster pump and is used for providing operation gas for the booster pump and controlling the pressurization rate; the control unit comprises a PLC (Programmable Logic Controller) control module and an upper computer, is in signal connection with each pressure regulating device, the flow meter and the booster pump, and is used for automatically regulating each component; and the pressure relief protection unit comprises a pressure relief device and is used for releasing the gas pressure of the target chamber when the gas pressure test is finished. The device is convenient to operate, high in automation degree and comprehensive in protection measures, and the test efficiency and the operation safety and convenience are improved.

The utility model belongs to the technical field of oil-gas separation, and particularly relates to an oil-gas separation and recovery device which comprises a venturi ejector, a high-pressure gas source, a cold air source and a recovery component, and the venturi ejector is provided with an oil steam inlet, a high-pressure gas inlet, a cold air inlet and an output port. The high-pressure gas inlet and the output port are oppositely formed in the two ends of the Venturi ejector, the oil steam inlet and the cold air inlet are formed in the side, close to the high-pressure gas inlet, of the throat pipe, and oil steam, high-pressure gas and cold air are introduced into the Venturi ejector through pipelines. The venturi ejector is connected with an output pipeline at an output port of the venturi ejector, and the recovery assembly is arranged on the output pipeline. High-pressure gas is introduced into the Venturi ejector, negative pressure is generated in the Venturi ejector to suck oil steam and cold air, the oil steam and the cold air are fully mixed at the throat pipe, the condensation phase change effect of an oil-gas mixture in the throat pipe and a follow-up pipeline is improved, and condensed oil drops are collected through the recovery assembly.

The invention provides oil shale pyrolysis reaction experimental equipment which comprises a loading chamber arranged on a supporting base plane and internally provided with a cuboid space; the sample loading and unloading module is movably arranged on one side of the loading chamber so as to move the sample into the loading chamber or move the sample out of the loading chamber; the pressure control module comprises four groups of loading hydraulic cylinders arranged on four inner side surfaces of the loading chamber and a pressure head of a press machine arranged above the loading chamber so as to apply pressure to the sample in the loading chamber; the servo pump pressure module is arranged on one side of the loading chamber and is communicated with the interior of the sample in the loading chamber so as to convey high-temperature and high-pressure gas to the interior of the sample; the monitoring module comprises a displacement detection part arranged in the loading chamber and is used for monitoring the displacement of the sample in the loading chamber; the tail gas treatment module is arranged on one side of the loading chamber and communicates with the interior of the loading chamber, and the problem that in the prior art, equipment capable of conducting large-size oil shale in-situ pyrolysis reaction is lacked is solved.

The invention discloses a preparation method of a copolyamide hot melt adhesive with low VOC (volatile organic compound) emission, which comprises five steps of feeding, salt forming reaction, polymerization reaction, pressure release and negative pressure stage, and is mainly characterized in that the low-VOC copolyamide hot melt adhesive is produced and synthesized by adjusting a production process, mainly adjusting a reaction process in the salt forming stage in a polyamide hot melt adhesive synthesis process. The copolyamide hot melt adhesive is synthesized by adopting a specific salt forming process and a synthesis route, and the VOC emission of copolyamide is low and does not exceed 10g / kg.

According to one embodiment of the present invention, the present invention is characterized in that, in addition to a conventional relief valve (7) into which outside air flows to return the inside of a drying chamber (1) to normal pressure after drying is completed, the present invention is provided with a separate outside air inflow means for introducing the outside air into the drying chamber (1) during reduced-pressure drying. When the internal pressure of the drying chamber (1) reaches around the target pressure, external air flows into the drying chamber (1). Furthermore, the invention is characterized by being used for the drying of pharmaceutical products, in particular for the manufacture of dry cakes of botulinum toxins. According to the present invention, during the reduced pressure drying process, when the internal pressure of the drying chamber reaches a target pressure, the inflow amount of the external gas is finely adjusted and the external gas flows into the drying chamber, such that the pressure inside the drying chamber, especially the pressure around a vial containing a liquid sample, can be prevented from substantially increasing and then decreasing. Therefore, the internal pressure of the drying chamber can be stably maintained as the target pressure.

This utility model discloses a stainless steel storage tank with good sealing performance for chemical production, including a tank body. A sealing cover is provided on the top of the tank body for sealing. A driving pressing assembly is provided on the surface of the tank body. The driving pressing assembly is used to drive and press down the sealing cover, improving the sealing performance between the sealing cover and the tank body. A connecting rotating assembly is provided on the sealing cover. This utility model achieves automated pressing and releasing of the sealing cover through the driving pressing assembly, replacing the traditional one-by-one bolt tightening operation. The sealing ring at the bottom of the sealing cover, together with the annular positioning block and annular positioning groove at the top of the tank body, form a triple sealing structure. The annular positioning block is embedded in the annular positioning groove for precise positioning, preventing the sealing cover from shifting. The pressing plate applies uniform pressure through the driving pressing assembly, ensuring a tight fit between the sealing ring and the upper edge of the tank body, eliminating local gaps.

The application discloses a kind of pneumatic directional drilling system and drilling method suitable for local water-containing soft coal seam, including directional drill bit, screw drill, conversion nipple, non-magnetic drill tool, multiple special directional drill pipes and air feeder connected in order from back to front;The screw drill includes output shaft end head connected with the directional drill bit and stator end head sleeved on one side of output shaft end head, and output shaft end head can rotate relative to the stator end head, by setting screw drill and conversion nipple, both directional drilling in water-containing soft coal seam can be guaranteed, and strong blowing process can be implemented to discharge drill cuttings and formation water in hole to outside of hole in time, keep drilling operation continuous and smooth, greatly reduce the amount of operation of pulling down drill during construction, and the comprehensive drilling efficiency can be improved by more than 20%, solve the technical problems of poor formation adaptability of prior art, and cannot realize strong blowing and cuttings discharge and rapid switching of directional drilling during directional hole construction process in local water-containing soft coal seam, resulting in low drilling efficiency.

This invention discloses a mobile aluminum ladle baking device, relating to the field of metallurgical equipment technology. It includes a base frame, with a lifting unit and several support frames fixedly mounted on the upper end of the base frame. An installation unit is located on the front side of the lifting unit, and an igniter unit is fixedly connected to the bottom front side of the installation unit. A gas delivery unit is located on the upper part of the support frames, a gas control unit is located on the upper right side of the installation unit, and an air supply unit is located on the upper left side of the installation unit. This invention, through the base frame, electric forklift, traveling unit, and support units, achieves flexible movement, rapid positioning, and stable support of the device within the work area; the lifting unit enables precise lifting of the installation unit, igniter unit, gas control unit, and air supply unit; and the gas delivery unit, gas control unit, air supply unit, and igniter unit ensure safe gas delivery and precise gas-air mixing.

The utility model discloses a kind of overflow well cementing plug casing pressure stabilizing devices, comprising: pressurizing pipeline, pressurizing pipeline input end is provided with single-flow valve, pressurizing pipeline output end is provided with adjustable pressure relief valve, pressurizing pipeline middle part is equipped with tee pipe, tee pipe one end outlet is connected with four-way pipe, four-way pipe is communicated with buffer, four-way pipe other end outlet is communicated with casing, tee pipe and the communication pipeline of sleeve are equipped with first gate valve, pressurizing pipeline is equipped with second gate valve and third gate valve respectively set in the two sides of tee pipe. The present application solves the problem that the cost of well killing fluid is high, and well killing fluid has an impact on the performance of cement slurry.

The invention discloses a pressure measuring and detecting device for stomach tube indwelling, and belongs to the field of stomach tube indwelling, the pressure measuring and detecting device comprises a stomach tube, a detecting device, a central control device, a detecting tube and a remote controller, the detecting device comprises a pressure gauge, the pressure gauge is used for directly reflecting the pressure in the stomach tube; and the detection tube is used for connecting the stomach tube and the pressure gauge and transmitting the pressure in the stomach tube to the pressure gauge. By detecting the pressure in the stomach tube, utilizing the positive pressure characteristic in the lung and the characteristic that the pressure in the lung changes positively and negatively, if it is monitored that the negative pressure possibly proves that the stomach tube enters the airway by mistake, the placement position of the stomach tube is accurately judged, then the mistakes during stomach tube placement can be reduced, and meanwhile, by means of the characteristic that the content in the airway is usually high, the accuracy of stomach tube placement is improved. And whether the stomach tube enters the airway mistakenly or not is judged, the problem of stomach tube position judgment is solved clinically, and adverse events and harm to a patient are reduced.

The invention discloses a pressure control well cementation system and method. The system comprises an automatic throttling unit, an automatic slurry supplementing and pressurizing unit and a control center. Wherein the automatic throttling unit is used for being arranged between a well mouth and a mud tank so as to control the back pressure of the well mouth by adjusting the valve opening degree of the throttling valve; the automatic slurry supplementing and pressurizing unit is used for being communicated with a connecting pipeline between a well mouth and the automatic throttling unit so as to control well mouth back pressure by compensating fluid flow for the system. The control center is used for controlling the automatic throttling unit to adjust the valve opening degree of the throttling valve and / or controlling the automatic slurry supplementing and pressurizing unit to adjust the output fluid flow so as to control the back pressure of the wellhead based on the target fluid parameters of the wellhead and the parameter deviation of the corresponding actually-measured fluid parameters. The fluid parameters comprise pressure or fluid flow, and the actually-measured fluid parameters comprise actually-measured pressure of one end, close to the wellhead, of a throttling valve of the automatic throttling unit or actually-measured fluid flow of the output end of the automatic throttling unit. And pressure control in the whole well cementation process can be achieved.

The invention relates to the technical field of oxygen cabins, in particular to a hyperbaric oxygen cabin door mounting structure which comprises a cabin door body, a circle of sealing rubber strip is arranged between the cabin door body and the inner wall of a cabin body, the front end and the rear end of the cabin door body are each provided with a fixing box with an opening in one side, and each inner wall of the fixing boxes is provided with a buffer assembly. The side edges of the two ends of the cabin door body are embedded into the fixing boxes correspondingly, each buffering assembly makes contact with the cabin door body, and sliding blocks matched with guide rails in the cabin body are symmetrically arranged at the two ends of the bottom face of each fixing box correspondingly. And the buffer assembly comprises a buffer plate, a through hole, a mounting cylinder, a first ball, an H-shaped sleeve, a mounting plate and a buffer spring, a cavity for containing the first ball is formed between the mounting cylinder and the H-shaped sleeve, and the upper surface of the first ball is exposed out of the through hole. The cabin door mounting structure has the advantages that machining and maintenance are simplified, sealing performance is improved, buffering and stability are optimized, dismounting, mounting and replacement are convenient, and the cabin door mounting structure adapts to pressure changes.

The utility model discloses a self-adaptive force stabilizing device for characterizing a mechanoluminescence cycle process, and belongs to the technical field of material testing. According to the device, collaborative operation is achieved through a reciprocating testing mechanism and a force loading mechanism which are in linkage design; the reciprocating testing mechanism drives a lead screw transmission assembly through a servo motor to drive a single-axis moving platform, a pressure digital display and a material to achieve reciprocating friction in the y-axis direction; the force loading mechanism pulls a sliding platform to slide on a sliding rail through a spring, a round-bottom quartz tube is arranged at the end of the force loading mechanism and is in point contact with a sample of a pressure digital display accessory, and when the sample is slightly abraded to cause position change, the spring dynamically compensates pressure loss to ensure that force loading in the x-axis direction is constant. An optical fiber is integrated in the round-bottom quartz tube to synchronously collect mechanoluminescence signals. The device solves the problem of force attenuation in the existing cycle test, and is beneficial to systematic research on the cycle characteristics of the mechanoluminescent material.

The utility model relates to the technical field of steam extraction flow stabilizing equipment of steam turbines, and particularly discloses a power station industrial steam extraction small-flow adjusting device which comprises a steam extraction main pipe and an adjusting pipeline, the steam extraction main pipe is communicated with the adjusting pipeline, a sunken U-shaped pipe is arranged in the middle of the adjusting pipeline, and an automatic adjusting valve is installed on a bottom pipeline of the U-shaped pipe. A filter and a drain pipe are further installed on the U-shaped pipe, the filter is located in front of the automatic regulating valve, and the drain pipe is located behind the automatic regulating valve; the design of the U-shaped pipe is adopted, steam conveyed by a low-pressure steam pipe network is collected and climbs through the U-shaped pipe, pressure relief and drainage are conducted through timing opening of the drainage pipe, air in the pipeline is discharged, the arrangement pressure and flow in the pipeline are adjusted to be more stable, and the problems of adjustment oscillation and large pressure fluctuation are avoided; an automatic regulating valve is adopted for starting control at the bottom full pipe position, the flexible regulating capacity of an energy system is improved, the resource utilization rate is increased, and economic benefits are created for companies.

This invention discloses a comprehensive performance testing system for an electronic expansion valve. One end of an electric proportional valve is connected to the outlet of a gas storage tank via a booster pump, and the other end is sequentially connected to valve 1, a first pressure sensor, valve 3, valve 6, a second pressure sensor, a stepping solenoid valve, valve 8, and a first flow meter. One end of valve 2 is connected between valve 1 and the first pressure sensor, and the other end is left unconnected. One end of valve 5 is connected to the connection point of valve 3 and the first pressure sensor, and the other end is connected to one end of valve 4. The other end of valve 4 is connected to the connection point of valve 6 and the second pressure sensor. One end of valve 7 is connected between the first pressure sensor and the stepping solenoid valve, and the other end is left unconnected. One end of valve 9 is connected between the stepping solenoid valve and valve 8, and the other end is connected to the second flow meter. The inlet and outlet of the electronic expansion valve under test are connected between valve 3 and valve 6, and between valve 5 and valve 4, respectively.

This utility model discloses a modular electrolytic reaction tank for preparing high-purity metallic magnesium, belonging to the field of metallic magnesium reaction tanks. It includes a reaction tank body, with a cover plate fixedly connected to the upper surface of the body by multiple bolts. A conveying pipe is fixedly connected to the left side of the upper surface of the cover plate. A collection box is fixedly connected to the right side of the lower inner surface of the reaction tank body. A through-type collection port is opened on the upper left side of the inside of the collection box. This utility model achieves efficient and rapid separation through the unique structure of the collection box and related components. When the liquid magnesium reaches a certain thickness, the level gauge detects a signal, the electric push rod is activated, pushing the sliding plate two. Through the gas box and gas delivery hole, the sliding plate one moves the baffle one upward, opening the collection port. Liquid magnesium quickly flows into the collection box, greatly reducing the residence time of liquid magnesium in the reaction tank body, effectively reducing impurity dissolution, and improving the purity of metallic magnesium and product quality.

This utility model discloses a diesel engine return oil pressure regulating control device, belonging to the field of diesel engine fuel system control technology. It includes a dry pump, a pressure regulating valve, a pipeline assembly, and a control circuit assembly. The pipeline assembly uses engineering pipelines. The pressure regulating valve is used to regulate the pressure at the dry pump inlet to ensure that the engine return oil pressure meets project requirements and that the return oil pipeline system is balanced. The control circuit assembly includes two power supply systems, a relay, and a benchtop control module. The power supply system consists of a regulated power supply and a power line. One end of one power supply system is connected to the negative terminal of the dry pump, and the other end of the normally open contact of the relay is connected to the positive terminal of the dry pump. One end of the other power supply system is connected to one end of the relay coil, and the other end of the relay coil and the other end of the power supply system are respectively connected to the switching terminals of the benchtop control module. This utility model has the technical advantages of precise pressure regulation, strong adaptability to operating conditions, convenient installation and maintenance, and high system reliability.