80results about How to "Real-time monitoring of pressure changes" patented technology

The invention provides an overheat detecting electric water heater which comprises a controller, an electric heating device and a water box, wherein the electric heating device is arranged in the water box; an electric heater comprises a left tube box, a right tube box and a heat exchange tube for communicating the left tube box with the right tube box; the electric heater is arranged in the left tube box and / or the right tube box; the heat exchange tube, the left tube box and the right tube box form a heating fluid closed cycle; a pressure sensor is also arranged on the electric heating device, and is used for detecting pressure in the electric heating device; the electric heating device and the pressure sensor are connected with the controller in a data manner; the controller judges whether a temperature is overheated or not according to the detected pressure to automatically control the running of the electric water heater; the controller is connected with a cloud server; the cloud server is connected with a water heater client, wherein the controller transmits measured pressure data to the cloud server, and afterwards, transmits the measured pressure data to the client through the cloud server; the client is a mobile phone; an APP program is installed in the mobile phone; a user can obtain the pressure data through the client. The intelligent overheat detecting electric water heater can intelligently detect the overheat of a heating device of a water heater, moreover, carries out intelligent control, and improves safety.

The invention relates to a real-time detection method of excavation of a foundation pit, which is used for detecting the displacement change of the peripheral soil body of the pit in the excavation process of the foundation pit, the change of the pressure of the peripheral soil body of the pit and the change of raised soil body of the bottom of the pit and belongs to the construction engineering field. The invention utilizes a pressure sensor and a displacement sensor to detect the axial force change of a steel support device of an internal hydraulic oil cylinder in real time; an optical distance meter is used for detecting the horizontal distance and longitudinal distance of the periphery of the foundation pit, then a three-dimensional laser scanner is used for monitoring the change of raised or concave surface of the foundation pit in real time and visual monitoring and operation are carried out by a computer. Compared with the existing detection method of the foundation pit, the invention realizes the supporting monitoring of the foundation pit with automatic collection, can greatly improve the degree of automation and the safety of the construction, saves the labor, simultaneously realizes the purpose of construction with high efficiency and can be widely applied to the field of construction of the foundation pit.

The invention relates to a three-dimensional single-well gas injection oil replacement simulation experiment device for a fracture-cavity reservoir. The experiment device comprises a gas injection system, a fracture-cavity simulation system and an image collecting and information processing system, wherein the fracture-cavity simulation system is communicated with the gas injection system, and the image collecting and information processing system is used for collecting, transmitting and processing image and data information of the fracture-cavity simulation system. The fracture-cavity simulation system comprises a plurality of karst cave models, a plurality of fracture models and a plurality of wellbore models, wherein the fracture models are used for allowing every two adjacent karst cave models to be connected in series; the wellbore models are communicated with the gas injection system, all the karst cave models and all the fracture models. The image collecting and information processing system comprises a plurality of particle imaging test modules and image collecting modules, wherein the particle imaging test modules are arranged in all the karst cave models respectively, and the image collecting modules are arranged on the periphery of the fracture-cavity simulation system. The experiment device can accurately and visually monitor the migration speed, pressure and time, in the gravitational differentiation process, of the three phases comprising oil, gas and water in karst caves, fractures and wellbores in real time, and therefore the experiment device can be widely used in research, development and production of oil and gas fields.

The invention discloses an oil reservoir water injection self-adaptive deep global regulation device and a construction method. The regulation device comprises agent dissolution and storage equipment and agent injection equipment which is connected with the agent dissolution and storage equipment through a connection pipeline. The agent dissolution and storage equipment comprises a cleaning and unchoking agent dissolution tank, a plurality of regulation agent dissolution tanks, an agent liquid mixer, an agent storage tank and a main liquid intake pipe. The agent injection equipment comprises a main liquid delivery pipe, a plunger pump installed on the main liquid delivery pipe, a liquid distributor connected with a liquid outlet of the main liquid delivery pipe, and a plurality of liquid injection pipes. The construction method includes the following steps that firstly, a well area to be regulated is determined; secondly, the equipment is placed in position and connected through the pipeline; thirdly, water is injected, and a pressure drop curve is tested before regulation; fourthly, cleaning and unchoking are conducted before regulation; fifthly, oil reservoir water injection self-adaptive deep global regulation is conducted on a target stratum. The oil reservoir water injection self-adaptive deep global regulation device is reasonable in design, convenient to install and lay, easy and convenient to operate, good in use effect and capable of effectively improving water displacing oil work efficiency and crude oil recovery efficiency.

The invention discloses a real-time monitoring disk brake with a pressure sensor. The real-time monitoring disk brake with the pressure senor comprises a brake shoe, a cylinder, a brake body, the pressure sensor, a disk spring guide sleeve, an oil cylinder part, a disk-shaped spring group and a linkage mechanism, wherein the brake shoe are arranged on the cylinder through pressure plates on the two sides; the disk-shaped spring group is arranged on the part, tightly adhered to the oil cylinder, of the disk spring guide sleeve; the disk spring guide sleeve drives a sliding sleeve to perform piston motion in the brake body by the oil cylinder part; the bottom of the disk spring guide sleeve is connected with the bottom of the cylinder through the linkage mechanism; the pressure sensor is clamped between the disk spring guide sleeve and the top part of the cylinder; and the real-time detection of a positive pressure is realized. By the real-time monitoring disk brake with the pressure sensor provided by the invention, the positive pressure in a linear direction between the brake shoe and the oil cylinder can be detected directly; interference factors in the detection is reduced; the monitoring of the maximum positive pressure, the minimum positive pressure and the secondary brake positive pressure, and the real-time monitoring of pressure change in an overall process are realized; and the safety in utilization of a hoisting machine is improved.

The invention discloses a melt flow control device for melt coating additive manufacturing. The melt flow control device comprises a crucible smelting unit, a dynamic gap control unit, a pneumatic control unit and a control system, wherein the dynamic gap control unit is connected with the crucible smelting unit through a control rod; the pneumatic control unit is hermitically connected with the crucible smelting unit through a pipeline; and the control system realizes data feedback and control for the crucible smelting unit, the dynamic gap control unit and the pneumatic control unit. The melt flow control device can control the magnitude of the flow in the whole melt coating forming process of a metal member, to fulfill the aim of additive manufacturing of an efficient, high-quality and low-cost metal material part.

The invention relates to a direct-reading examining seal instrument suitable for an eccentric water distributor. The direct-reading examining seal instrument comprises an examining seal instrument framework, a control part, a direct-reading pressure measurement part, a controllable sealing pup joint and a controllable positioning pup joint, wherein the control part, the direct-reading pressure measurement part, the controllable sealing pup joint and the controllable positioning pup joint are sequentially arranged on the examining seal instrument framework from top to bottom; and the control part is connected with the controllable sealing pup joint and the controllable positioning pup joint respectively and drives the controllable sealing pup joint and the controllable positioning pup joint to work. According to the direct-reading examining seal instrument suitable for the eccentric water distributor, the real-time monitoring on examining seal data can be realized, and the operations of controlling of the opening and the closing of a positioning arm and the setting and the unsetting of a seal section are realized by a motor through an upper computer software control instrument.

The invention provides an electric water heater capable of detecting leakage. The electric water heater comprises a controller, an electric heating device and a water tank. The electric heating device is disposed in the water tank. The electric heating device comprises a left pipe box, a right pipe box and heat exchange pipes which make the left pipe box communicate with the right pipe box, electric heaters are disposed in the left pipe box and / or the right pipe box, and the heat exchange pipes, the left pipe box and the right pipe box form a heated fluid closed cycle; the electric heating device is further provided with a pressure sensor which is used for detecting pressure inside the electric heating device; the electric heating device and the pressure sensor are in data connection with the controller, and the controller automatically controls operation of the electric water heater according to detected pressure; and the controller is connected with a cloud server, the cloud server is connected with a water heater client, the controller transmits measured pressure data to the cloud server, then the pressure data are transmitted to the client through the cloud server, the client is a mobile phone, an APP program is installed in the mobile phone, and a user can obtain the pressure data through the client. The electric water heater can intelligently detect leakage of the heating device of the water heater and conduct intelligent control, and therefore, the safety is improved.

The invention belongs to the technical field of valve testing, and provides a testing device and testing method for lift force of a valve disc of a safety valve. The testing device is mainly used formeasuring the lift force of the valve disc under different air pressure and different valve disc opening. The whole testing device comprises an air supply device, a connecting pipeline, the safety valve, a micrometer feeding mechanism, a displacement detection device, an air pressure detection device, a pressure detection device and a data acquisition system. The data acquisition system is connected with the displacement detection device, the air pressure detection device and the pressure detection device, and the acquisition, processing and storage of data can be realized. The micrometer feeding mechanism is arranged on the safety valve to be used for adjusting the opening of the valve disc. The displacement detection device is arranged on the safety valve to be used for feeding back theopening of the valve disc. The air pressure detection device is used for monitoring the air pressure in the pipeline in real time. The pressure detection device is used for measuring the lift force ofthe valve disc in real time. The testing device has a simple structure and high precision, and a guarantee for testing of the lift force of the valve disc of the safety valve is provided.

The invention discloses an adhesive conveying system with dosage control. The adhesive conveying system comprises an adhesive A conveying channel and an adhesive B conveying channel and is characterized in that the adhesive A conveying channel and the adhesive B conveying channel are respectively provided with a metering pump A and a metering pump B, an adhesive mixing valve is arranged at the joint of the adhesive A conveying channel and the adhesive B conveying channel, and a pressure detection device is also arranged between the metering pump A and the adhesive mixing valve, a pressure sensor is connected with a control unit through signals, the control unit is connected with an alarm apparatus through signals and is a PLC (Programmable Logic Controller). The alarm apparatus is an audible and visual alarm. The adhesive mixing valve is connected with an adhesive spraying gun through a pipeline. The adhesive conveying system has the beneficial effects of being capable of monitoring the pressure change of the adhesive A conveying pipe in real time, further judging whether a blockage point is in the front end or the rear end of the metering pump, and providing an alarm signal to remind an operator of processing a fault.

The invention discloses a puncture device for laparoscope operation capable of automatically warning, and belongs to a puncture device capable of automatically warning when an abdominal cavity puncture needle passes through the peritoneum for reminding an operator that the puncture needle passes through the peritoneum. A pair of chutes (1-1) are symmetrically formed in the inner wall of a puncture needle tube (1) relative to the axial line, the lower part in the puncture needle pipe is provided with a sensor plate (1-3), a pressure spring (1-2) is positioned on a pressure sensor (1-3-1) positioned in the center of the sensor plate, the outer surface of a puncture needle core (2) is symmetrically provided with a pair of slide rails (2-1) relative to the axial line, the puncture needle core is positioned in the puncture needle tube, the chutes and the slide rails are embedded, a pressure sensor, a signal converter (1-3-2) and a Bluetooth emitting module (1-3-3) which are in sequential serial connection are arranged on the sensor plate, and the signals are sent to a corresponding computer (3) through the Bluetooth emitting module.

The invention discloses a pressure-stabilized simulated grouting test device and an application method thereof. The technical problems that the existing grouting test cannot repeatedly simulate a plurality of working conditions and the grouting pressure is difficult to control are solved. The device provided by the invention comprises a slurry grouting tank which is connected with an air compressor through a first conduit. A pressure regulating valve is arranged on the first conduit. The slurry grouting tank is connected with a sample mold through a second conduit. The second conduit is provided with a slurry outlet valve. The sample mold is a visualized pressure infiltration sample mold or a visualized slurry diffusion radius and real-time medium pressure detection sample mold. The methodcan realize the grouting process of a grouted medium in a test room from compaction to split grouting, and can monitor the variation law of the top pressure and the diffusion radius between structural layers, and realizes the visualization of the grouting process and the controllability of the grouting pressure and the grout amount. The operation is simple, and the test results are easy to quantify.

The invention discloses an intravenous infusion permeation prevention device for operating room nursing, and relates to the technical field of medical instruments. The intravenous infusion permeationprevention device comprises an infusion workbench and a base, a fixing groove is vertically formed in the infusion workbench, a detection box is arranged on the front side of a supporting rod, a piston rod is arranged inside the detection box, a sleeve is mounted at one end of the piston rod in a matched manner, a monitoring interface is arranged in the sleeve, an infusion needle is connected to one end of the sleeve in a sleeved manner, an arc-shaped supporting groove is formed in the upper surface of the infusion workbench, an arc-shaped protection plate is hinged to the upper portion of thearc-shaped supporting groove, a support is slidably arranged on one side face of the infusion workbench, and a monitoring probe and a blood vessel developing lamp are mounted at one end of the support. The monitoring interface is arranged at the joint of the infusion needle and the sleeve, infusion pressure change is monitored in real time and displayed on a pressure display panel of the detection box, the liquid level of an infusion tube can be monitored in real time, medical treatment accidents are avoided, infusion safety is improved, and pain of a patient is relieved.

The invention relates to an intelligent comprehensive monitoring system of a railway switch and a method; the system comprises a pressure measuring device, a liquid level measuring device, a gap monitoring device and a current transformer; the pressure measuring device is used for measuring the change data of the pressure of a hydraulic loop of the railway switch during the conversion process of the railway switch; the liquid level measuring device is used for measuring the change data of the liquid level of an oil cylinder of the railway switch when the conversion process of the railway switch is over and the work is stopped; the gap monitoring device is used for acquiring a gap deviation value after the conversion process of the railway switch is over and the work is stopped; the current transformer is arranged on a power cord of the railway switch, and is used for sending a starting signal or a sensing stopping signal to the pressure measuring device, the liquid level measuring device and the gap monitoring device; and according to the intelligent comprehensive monitoring system of the railway switch and the method, the changes of pressure and the liquid level of the oil cylinder when the railway switch acts can be monitored in real time and a measuring mode can be changed, so that an indication lever does not need to be changed when a target is installed, the data transmission pressure is reduced, and communication construction is prevented.

The invention discloses an injection process of a chemical heat generating system in a thick oil storage layer; a cold production mode is used for injecting as follows: heat generating agent slug injection, separation liquid slug injection, trigger agent slug injection, replacement liquid slug injection, well closing and well opening production; a steam injection heat production mode is used for injecting as follows: steam preheating slug injection, heat generating agent slug injection, separation liquid slug injection, trigger agent slug injection, replacement liquid slug injection, well braising and well opening production; the process is simple in steps, reasonable in design, convenient to operate, safe and reliable in injection process and excellent in use effect, and can simply finish the injection process of the chemical heat generating system in the thick oil storage layer; moreover, the invention further discloses injection equipment of the chemical heat generating system in the thick oil storage layer; the equipment comprises four liquid mixing devices and one liquid injection pipe connected with a shaft of a target well; a plunger pump, a pressure detecting unit and a fifth one-way valve are mounted on the liquid injection pipe; and the equipment is simple in structure, reasonable in design, convenient for pipeline connection, simple in use and operation and excellent in use effect.

The invention relates to a drain system for blast furnace hearth standing water, and belongs to the field of blast furnaces. The drain system comprises short drain pipes, branch drain pipes and a maindrain pipe. The tail end of the main drain pipe is connected with an automatic drain device. Pressure detection devices and overhaul valves are arranged on the short drain pipes. The overhaul valvesare arranged at the positions, behind the pressure detection devices, of the tail ends of the short drain pipes. The branch drain pipes comprise straight pipe sections I and straight pipe sections II.One ends of the straight pipe sections I are connected with one ends of the straight pipe sections II through overhaul three-way valves to form L-shaped pipe body structures, the other ends of the straight pipe sections are connected to the short drain pipes, and the other ends of the straight pipe sections II are connected to the main drain pipe. The whole drain pipeline composition is simple, the standing water gathered in furnace hearths in the production process of the blast furnaces can be drained in time, online unblocking can be achieved, maintenance is convenient, the service life ofthe blast furnace hearths is prolonged, and economic benefits are increased.

The invention discloses vehicle air conditioner compressor comprehensive performance testing equipment, and belongs to the technical field of vehicle air conditioner compressor assembly. The equipmentcomprises a loading and conveying mechanism, a loading and shifting mechanism, a testing and feeding mechanism and a function testing mechanism connected in sequence; a spiral electric eddy compressor is arranged between the loading and conveying mechanism and the function testing mechanism; the function testing mechanism and the corresponding spiral electric eddy compressor are closed for soundinsulation through a silencing room; and in the simulated operation process of the spiral electric eddy compressor, noise parameters of the spiral electric eddy compressor are tested. The equipment prevents manual intervention, improves the testing efficiency and the testing precision, and comprehensively guarantees the detecting effectiveness and precision; the insulation, the pressure resistance, the vibration and the noise are integrated in one equipment, so that the equipment is high in integrity, light and small; and dual quality indexes of vibration and noise of the compressor can be synchronously detected through vibration change returned by a vibration sensor.

The invention relates to an online continuous monitoring sampling protecting device for external oil-water well casing pressure. The problem that an existing casing is damaged by being extruded or broken is mainly solved. The online continuous monitoring sampling protecting device is characterized in that the upper portion of a pressure measuring sampling tube (4) is connected with a ground device (18), the lower portion of the pressure measuring sampling tube (4) is connected with a pressure sampling sampler (8), the ground device (18) is arranged at the position of an oil-water well mouth (27) and comprises a tee joint I (17), the lower portion of the tee joint I (17) is connected with a well shut-in valve (30), the lower portion of the well shut-in valve (30) is connected with the pressure measuring sampling tube (4), the upper portion of the tee joint I (17) is connected with a liquid injection exhaust and drainage valve (16), and a side face connector of the tee joint I (17) is connected with a pressure measuring recording instrument (14) and a sampling valve (13). According to the online continuous monitoring sampling protecting device, changes of the external casing pressure and changes of water quality components can be monitored in real time, so that corresponding measures are adopted before the casing is extruded or broke, and casing damages are avoided or reduced.

The invention discloses a scale model testing device capable of simulating the prototype pile foundation stress state. The scale model testing device comprises a cylindrical outer box and inner box; asoil sample is placed in the inner box, and a pile foundation is buried in the soil sample; the inner box is defined by four or more identical circular-arc-shaped abrasive tools, and four radial baserails are arranged at the bottom of the outer box; a clamping groove of each abrasive tool is clamped in the corresponding base rail, and each abrasive tool and the two corresponding adjacent abrasive tools are connected in an end-to-end lapped mode; and a device applying the pressure to the side wall of the inner box is arranged between the outer box and the inner box, and thus the radial dimension of the inner box is decreased. By arranging the outer box and the retractable rigid inner box, the working property of a pile-soil system under the actual stress state is simulated in a segmentedmode, a vertical pressure gauge or an airbag is arranged in pile periphery soil to calibrate and real-timely monitor the pressure change of the pile-soil system, and thus the scale model testing device capable of being reutilized and simulating the stress state of the prototype pile-soil system is obtained.

The invention discloses a crude oil produced hydrogen sulfide on-line monitoring experimental device comprising a high-temperature high-pressure reaction kettle, a power injection device and a monitoring device, wherein the high-temperature high-pressure reaction kettle is provided with an inlet and an outlet; the power injection device is connected to the inlet of the high-temperature high-pressure reaction kettle; the monitoring device is connected to the outlet of the high-temperature high-pressure reaction kettle. A power source is provided by adopting a high-pressure gas cylinder, pressure changes in the reaction kettle are monitored by a pressure sensor in real time, on-off of a quick-opening valve is controlled, and the quick-opening valve is closely connected with a hydrogen sulfide monitor. After the pressure in the reaction kettle is higher than the set pressure of the quick-opening valve, the quick-opening valve is opened, gases in the kettle are released, the gas is monitored through the hydrogen sulfide monitor and data is recorded, and finally residual waste gases are treated through an alkali absorption device. The experimental device has the beneficial effects that: 1, the danger coefficient is small, direct contact between a human body and hydrogen sulfide gas is avoided in the whole hydrogen sulfide monitoring process, and leakage of the hydrogen sulfide gas is effectively avoided; and 2, the operation program is simple, and the hydrogen sulfide gas can be monitored in real time.

The invention belongs to the technical field of testing or analyzing materials by means of measuring chemical or physical properties of the materials, and provides a coal sample gas constant-pressure adsorption and desorption rate testing device and method. In the coal sample gas constant-pressure adsorption and desorption rate testing device, a first high-pressure gas cylinder, a second high-pressure gas cylinder and a vacuum degassing system are connected in parallel and are respectively connected with one end of a main high-pressure pipeline through a first pipeline, a second pipeline and a third pipeline; a sample tank and a reference tank are arranged in parallel and are respectively connected with the other end of the main high-pressure pipeline through a fourth pipeline and a fifth pipeline; a drying system is connected with the sample tank through a sixth pipeline and can dry the coal sample stored in the sample tank; a constant-temperature system is positioned outside the sample tank and the reference tank; and an analysis control system is in communication connection with the first electromagnetic valve, the second electromagnetic valve, the fourth pressure sensor, the fourth electromagnetic valve, the fifth pressure sensor and the fifth electromagnetic valve.

The invention provides a stratum crack leaking stoppage simulation device and simulation system. The simulation device comprises a shell, a simulation crack upper plate, a simulation crack lower plate and an overburden pressure booster pump; the front end and the rear end of the shell are provided with an inlet and an outlet respectively, the simulation crack upper plate and the simulation crack lower plate are installed in the shell, a simulation crack is defined by the simulation crack upper plate and the simulation crack lower plate, and the two ends of the simulation crack extend to the inlet and the outlet respectively; the simulation crack lower plate can move in the direction perpendicular to the simulation crack, the simulation crack upper plate is provided with a plurality of pressure measuring points, the pressure measuring points are connected to one end of a pressure transmission pipeline, the other end of the pressure transmission pipeline penetrates through the shell to be connected to a pressure sensor, wherein the other end of the pressure transmission line connected to one of the pressure measuring points passes through the shell to be also connected to the overlying pressure booster pump.

The invention relates to an oil-draining and nitrogen-injecting fire extinguishing device comprising double oil draining systems. The device comprises a fire control cabinet, a first transformer, a second transformer, a control cabinet and an accident oil tank; a terminal box, a nitrogen cylinder, a first oil draining pipeline, a second oil draining pipeline as well as a first nitrogen injecting pipe and a second nitrogen injecting pipe which are arranged on an outlet pipeline of the nitrogen cylinder are arranged in the fire control cabinet; a first pressure detector and a first oil draining valve are arranged on the first oil draining pipeline; a second pressure detector and a second oil draining valve are arranged on the second oil draining pipeline; oil leakage detecting assemblies are arranged in pipelines on lower sides of the first oil draining valve and the second oil draining valve and the first pressure detector and the second pressure detector are connected with the control cabinet through the terminal box. The device is relatively reasonable in structural design, can effectively solve problems about pressure detection and pipeline oil leakage of nitrogen-injecting fire extinguishing devices in the prior art, and is convenient, practical and suitable for further popularization and application.

The invention relates to a fast airship capsule inflating system and a fast airship capsule inflating method. The fast airship capsule inflating system comprises a supporting framework, a capsule, diffusing devices for shunting and decompressing gas, a pressure difference sensor, inflating connectors and a control system, wherein the capsule is an ellipsoid; the supporting framework is formed by connecting hollow supporting rods and is horizontally arranged inside the capsule; the diffusing devices are mounted on the supporting framework; the pressure difference sensor is arranged inside the capsule; the inflating connectors are mounted on the two sides of the minor axis of the capsule; the control system is mounted at the middle part of the supporting framework, is electrically connected with the pressure difference sensor and a high-pressure gas source, and is used for controlling opening and closure of the high-pressure gas source. In the capsule, the hollow supporting framework and the diffusing devices are used for shunting and decompressing the gas, so that conversion of high-pressure gas into a gas flow with relatively low pressure and a stable flow speed is achieved, and an external shunting and decompressing device is replaced and the manufacturing cost is reduced; change of the internal pressure of the capsule can be detected in real time, so that the equipment safety is protected.

The invention relates to the technical field of air conditioning and particularly relates to a cold medium leakage-proof regulator for a building air conditioning system. The cold medium leakage-proof regulator comprises a compressor, an evaporator, a throttle valve and a condenser, a cold medium channel between the throttle valve and the condenser, and a solenoid valve and a pressure sensor which are arranged on the cold medium channel, wherein a mass flow sensor and a mass flow regulation device are arranged between the compressor and the evaporator; the mass flow regulation device comprises a foundation pipeline and a stepping pipeline; the foundation pipeline is internally provided with a transverse cold medium through hole and a longitudinal mounting hole; an elastic bulge is arranged on an inner side wall in the mounting hole; the stepping pipeline is transversely provided with an regulation hole and a groove; an electric retractable rod and a stepping motor are arranged at the top of the stepping pipeline; and a cold medium detector is arranged on the cold medium channel. The cold medium leakage-proof regulator for the building air conditioning system can be used for comprehensively monitoring a cold medium leakage problem and pertinent regulation and control measures are adopted, so that the safety of the air conditioning system is improved; and meanwhile, a proper cold medium mass flow can be regulated aiming at different mounting conditions and working conditions.

The invention discloses an experiment device for the fire resistance of a structure. A furnace body adopts a vertical and horizontal dual-use design. When a vertical furnace door is closed, testing onhorizontal components (such as a floor and a ceiling) can be conducted by opening a horizontal furnace door; and when the horizontal furnace door is closed, testing on vertical components (such as doors and walls) can be conducted by opening the vertical furnace door. The furnace body provides a temperature sensor, pressure sensors and an oxygen content detection connector, and changes of the temperature, the pressure and the oxygen content in the furnace can be detected in real time. In addition, the thermal insulation performance in the furnace is excellent, the temperature in the furnace can linearly rise to 1,200 DEG C within 5 min under control of a program, and after being kept for a period of time, the temperature linearly drops to room temperature.

The invention discloses an anti-rollover device for a cement pump truck. The anti-rollover device comprises a microcomputer, an analog-to-digital converter, a hydraulic system switch, an alarming device, hydraulic sensors and support oil cylinders, wherein the microcomputer, the analog-to-digital converter, the hydraulic system switch and the alarming device are installed on the operating panel of the cement pump truck; the microcomputer is respectively connected with the analog-to-digital converter, the alarming device and the hydraulic system switch through data lines; and the hydraulic sensors are installed on the support oil cylinders and are connected with the analog-to-digital converter through data lines. During operation, the pressure change situations of the support oil cylinders are monitored in real time through the hydraulic sensors; if the pressure change value exceeds a safety value, the microcomputer gives out a command to the alarming device and the hydraulic system switch, the alarming device gives out an alarm, the hydraulic system switch is turned off and the cement pump truck stops working; and if the pressure change value does not exceeds the safety value, the cement pump truck operates continuously. The anti-rollover device for the cement pump truck has the advantages that the pressure change situations of the support oil cylinders can be monitored in real time, the cement pump truck is effectively prevented from rolling over and the practicability is very high.

Disclosed is a visual physical simulation device under the condition of a complex hydrocarbon reservoir real core well network. A displacement system is connected with a well network physical simulation unit. The well network physical simulation unit is connected with a flow metering system. A high pressure pipeline in front of the well network physical simulation unit and a high pressure pipeline behind the well network physical simulation unit are provided with identical pressure sensors respectively. The two pressure sensors are respectively connected with a monitoring system. A microscope is arranged above the well network physical simulation unit and connected with the monitoring system. The displacement system enables pressurized displacement fluid to enter the high pressure pipelines. The pressure sensors monitor pressure and then are connected into a real core set. Pressure at the preset position is monitored through the sensors and transmitted into the monitoring system. The displacement fluid enters a stainless steel tube groove and then flows into an exit end guiding groove. After the pressure is monitored by the rear-end pressure sensor, the displacement fluid flows to the metering system, and flow is recorded. The inlet end and the outlet end in the whole displacement process and signals of the pressure sensors of a well network physical simulation system are connected into the monitoring system. Meanwhile, the monitoring system monitors real-time images in the displacement process in real time through the microscope.

The invention relates to the technical field of MPCVD equipment, in particular to a tensioning device for an MPCVD, and solves the problems of incapacity of timely measuring and adjusting of tensioning force of a connecting rod in MPCVD equipment in the prior art. The tensioning device comprises a reaction cavity, a waveguide cavity and a connecting rod, a tensioning device body located below thewaveguide cavity is further mounted on the connecting rod, the tensioning device body comprises a tensioning assembly, an elastic element, a pallet, a pre-tightened piece, a tensioning piece and a weighing sensor, and the weighing sensor is electrically connected to a display. According to the tensioning device for the MPCVD, as the change of the tensioning force of the elastic element is caused by the change of the tensioning force of the connecting rod, the expected force of the elastic element can be measured at any time through the weighing sensor in the tensioning device body and displayed on the display, the change of the tensioning force of the connecting rod can be viewed at any time through the display, and the change of the tensioning force of the connecting rod can be measured timely, so that the tensioning force of the connecting rod can be adjusted timely.