265 results about "Pressure controller" patented technology

A pressure regulating device includes an on-board storage tank, a mixing chamber, first and second lines, a recirculation line, a pressure sensor and a controller. The storage tank stores and supplies cryogenic fuel to a combustion chamber and includes a booster pump. The first line supplies cryogenic fuel in the liquid state and includes a pressurizing pump and a first regulation valve. The second line supplies cryogenic fuel in the gaseous state and includes a compressor and a first control valve. The recirculation line includes a second regulation valve and with a first heat exchanger. The pressure sensor detects the pressure inside the storage tank. The controller receives the pressure and controls the first and second regulation valves, the first control valve, the pressurizing pump, the booster pump and the compressor, as a function of a value of a setpoint pressure inside the storage tank.

The present invention discloses a closed-loop EGR flow control system and control method for a natural gas engine. The control system includes: a controller for determining an EGR demand flow rate based on actual engine operating conditions; a controller for obtaining the pressure of an air and gas mixture detected by an intake pressure sensor; or, alternatively, for determining the pressure of an air and gas mixture based on the EGR demand flow rate, a threshold flow rate, the maximum opening of an EGR valve, the actual opening of the EGR valve, the gas flow rate, and the fresh air flow rate; a controller for determining an actual EGR flow rate based on the obtained pressure of the air and gas mixture, the partial pressure of gases in the cylinder, the pressure-to-flow conversion slope, the gas flow rate, and the fresh air flow rate; a controller for determining an EGR flow rate correction value based on the obtained actual EGR flow rate and the EGR demand flow rate; and a controller for adjusting the EGR valve opening based on the EGR flow rate correction value so that the actual EGR flow rate matches the EGR demand flow rate, thereby achieving closed-loop control of the EGR flow rate. The present invention can achieve precise control of the EGR flow rate in two ways.

The invention relates to the technical field of pressure controllers, in particular to an intelligent pressure controller which comprises a shell, a processing unit and a control unit. A threaded connector is arranged at the bottom of the shell and used for being connected to a pipeline. An elastic membrane, an ejector rod and a sensor are arranged in the shell; the elastic diaphragm ejects the ejector rod under the action of a pressure medium; a sectional cleaning mechanism is arranged in the shell; the sectional cleaning mechanism is used for cleaning dirt on the elastic membrane in a sectional manner; the first mounting ring, the first cleaning block, the second mounting ring and the second cleaning block are arranged on the two sides of the shell, dirt on the periphery of the elastic membrane is wiped by the first cleaning block, dirt in the middle of the elastic membrane is wiped by the second cleaning block, and therefore it is guaranteed that the pressure of a pressure medium in a pipeline transmitted by the elastic membrane is not affected by the dirt.

The invention discloses a powder gas leakage diffusion monitoring physical simulation system and method. According to the system, a plurality of gas energy control doors are sequentially installed in a simulation box body in the length direction; the dry powder aerosol generator, the smoke generator, the temperature generator, the humidity generator, the pressure controller and the toxic gas standard gas cylinder are connected with the head end of the simulation box body; the smoke exhaust fan is connected with the tail end of the simulation box body; the recycling and filtering device is connected with the smoke exhaust fan; the gas treatment tank is connected with the recycling and filtering device; the multi-parameter integrated detection unit is arranged in the cavity space of the simulation box body; the armored heating jacket is coated outside the simulation box body; the data processing platform is connected with the multi-parameter integrated detection unit; the method comprises the following steps: the system sets a simulation environment; simulating a leakage diffusion process; analyzing the spatial and temporal distribution condition of the multi-dimensional monitoring data to obtain a diffusion path and a concentration change trend of the leaked substance, and displaying a simulation result in real time. According to the system and the method, the powder gas leakage diffusion process under different environment parameter combination conditions can be simulated.

The utility model relates to the technical field of air pressing equipment, in particular to air pressing equipment integrating an air dryer and an air compressor into a skid, which comprises a skid seat, an air compressor, a refrigeration type compressed air dryer, a compressed air filter, an air-water separator group and a double compressed air filter group. The utility model focuses on the innovation of the air pressing equipment, and provides the air pressing equipment which integrates the air dryer and the air compressor into the skid for solving the problems of dispersion, low efficiency, poor precision and the like of the traditional air dryer and the traditional pressing equipment. The air compressor supplies air, the refrigeration type compressed air dryer dehumidifies and then is precisely regulated and controlled through the PLC in combination with the high-precision pressure controller, and the device has the outstanding advantages of integration, high efficiency, precise pressure control, safety, reliability, wide application and the like, and can be widely applied to air pressure testing requirements of industries such as petrochemical engineering, natural gas, pressure pipelines and pressure containers.

The invention discloses a method for testing dynamic granularity of a valve, and belongs to the technical field of ultra-pure fluid systems. According to the method, through components such as an air inlet pressure regulating valve, a pressure gauge, a high-pressure controller, a particle counter, a main channel and a test channel, accurate monitoring of dynamic particle pollution of the valve under the actual working condition is achieved; the method comprises the following steps: 1, ensuring that a particle counter works under stable sampling flow through a flow regulation compensation mechanism, and improving the accuracy of measured data; 2, static purging is carried out, initial particle pollution is effectively removed, and a clean basic environment is provided for dynamic testing; step 3, dynamically purging the tested piece by detecting the switching frequency, simulating the actual opening and closing process of the valve, and dynamically evaluating the cleanliness of the tested piece; according to the invention, the limitation of the traditional static test is overcome, the dynamic particle release characteristics of the valve are truly reflected, and a comprehensive and accurate particle size test result is provided for an ultra-pure fluid system.

The invention belongs to the field of electro-hydrostatic actuators, and particularly relates to an electro-hydrostatic actuator structure with a high servo characteristic and a control method. Comprising a servo motor, a hydraulic pump, a hydraulic control one-way valve, a shuttle valve, an electromagnetic valve, a pressure sensor, an actuator cylinder and a controller. The servo motor is mechanically connected with the hydraulic pump, hydraulic control one-way valves are connected between the actuating cylinder and an oil inlet and outlet path of the hydraulic pump, and the pressure of remote control ports of the two hydraulic control one-way valves is switched through the two electromagnetic valves. The pressure sensors measure the pressure of the two cavities of the actuator cylinder and transmit the pressure to the controller. The two inlets of the shuttle valve are respectively communicated with the two cavities of the actuating cylinder to select the high-pressure side pressure in the oil cavity of the actuating cylinder; and the controller controls the rotating speed and the torque of the servo motor after receiving the position instruction, the motor state parameters and the data of the pressure sensor. According to the electro-hydrostatic actuator, the rotating speed overshoot of the hydraulic pump in the starting process can be reduced, and the servo characteristic of the electro-hydrostatic actuator is improved.

The utility model relates to the technical field of silane gas analysis, and provides a sample introduction and tail gas treatment system for silane gas analysis, which is used for sample introduction of silane gas and is beneficial to improvement of detection repeatability and accuracy. The system comprises a six-way valve and a purge gas input pipe, and further comprises a sample gas inlet pipe, a carrier gas inlet pipe, a quantitative ring and a tail gas output pipe which are respectively connected with the six-way valve, the system further comprises a tail gas absorption tank; the tail gas output pipe comprises an upstream pipe section and a downstream pipe section, and the purge gas input pipe is communicated with the tail gas absorption tank through the downstream pipe section of the tail gas output pipe; the sample gas inlet pipe is provided with a pressure regulating valve and a pressure sensor, and the pressure regulating valve and the pressure sensor are respectively in communication connection with the pressure controller; a carrier gas pressure reducing valve and a flow controller for adjusting the carrier gas flow in the carrier gas inlet pipe are arranged on the carrier gas inlet pipe; and the upstream pipe section of the tail gas output pipe is provided with a flow meter and a one-way valve.

The utility model belongs to the technical field of head-up display instruments, and particularly relates to an automobile head-up display instrument pressure maintaining clamp which comprises a first clamping block symmetrically arranged at one end of an automobile head-up display instrument and a second clamping block arranged at the other end of the automobile head-up display instrument, and two pressure sensors are arranged on the two end faces of the automobile head-up display instrument. The first pressure sensor and the second pressure sensor are connected with a pressure controller; first and second angle adjusting assemblies are respectively arranged at two opposite ends of the first and second clamping blocks; first and second force application cylinders are respectively arranged at two ends; the first clamping block and the second clamping block form an angle alpha with the horizontal plane. The pressure is measured through the force application cylinder and the pressure sensor, and the force application cylinder and the pressure sensor are matched with the pressure controller to test the pressure of the head-up display instrument, so that certain pressure is kept in the pressing process to ensure that a screen or other components are tightly combined with a shell or other parts of the head-up display instrument; the angle adjusting assemblies on the two sides can adjust the two clamping blocks to adapt to curved screens of different sizes and different angles.

The invention discloses an MO source system for chemical vapor deposition equipment, the MO source system comprises a pressure reducing valve, a Sorce-MFC, a Push-MFC, a pressure controller, a Line valve, an RUN valve, an extraction valve and a manual valve, the pressure reducing valve is used for controlling the gas inlet pressure of a single-path MO source system, the Sorce-MFC is used for controlling carrier gas flowing into a source bottle, the Push-MFC is used for further adding the carrier gas to dilute the carrier gas flowing out of the source bottle, and the pressure controller is used for controlling the gas inlet pressure of the single-path MO source system. And the pressure controller is used for controlling the pressure of the flowing-out gas. The MO source in the MOCVD system is independent and connected into the corresponding CVD equipment process environment, the use process of the MO source is greatly simplified, continuous supply, temperature control and precise regulation and control of the MO source are achieved, precise control over the flow and pressure of the MO source and carrier gas is achieved through the pressure reducing valve, the Sorce-MFC and the Push-MFC, and the service life of the MO source is prolonged. Therefore, stable supply and uniform distribution of the MO source in the CVD equipment are ensured, and the production efficiency and the product quality of the CVD equipment are improved.

The invention provides an automatic testing system for the stability of a pressure sensor. The automatic testing system comprises an upper computer, a high-precision pressure controller, a constant-temperature box, a multi-channel electromagnetic valve array, an IO module, a data acquisition module and a testing tool. According to the system, the upper computer controls the high-precision pressure controller to output set pressure, meanwhile, the constant temperature box is controlled to maintain a constant temperature environment, the multi-channel electromagnetic valve array is utilized to circularly switch multiple test channels through a time triggering mechanism, the test process is automatically executed according to a preset period, and the test efficiency is improved. Output data of a sensor to be tested in the constant temperature box under set pressure are collected in real time, a pressure and temperature curve is drawn dynamically, and the data are stored and analyzed. The system supports multi-channel parallel testing, parameter configuration and real-time data visualization, solves the technical problems of low automation degree, poor environment consistency and difficulty in synchronous testing of sensors with different measuring ranges in traditional stability testing, and remarkably improves the testing efficiency and the data reliability.

The invention provides an ultramicro dispensing device and method based on air pressure-vision double closed-loop control, and belongs to the technical field of micro-nano manufacturing, the device comprises an air source, a pressure reducing valve, a Venturi tube, an electronic pressure controller, an electromagnetic valve circuit, a digital-to-analog conversion module, a calculation module, an air pressure sensor, a dispensing needle tube, a vision module and a dispensing platform, the method comprises the following steps: detecting the diameter of a glue spot in real time by adopting a visual unit, dynamically identifying an air pressure-glue spot diameter nonlinear compensation model, and adjusting the air pressure of a dispensing needle tube by adopting a closed-loop controller to realize accurate control of the glue spot. Experimental results show that the glue spot control with the minimum diameter of 9.87 microns can be realized, the quantitative dispensing of 10 microns, 20 microns, 30 microns and 40 microns can be completed, the error is within 8.3%, and the glue spot control device has the advantages of high precision and high stability.

This invention discloses a temperature-compensated seepage-shear coupling true triaxial testing apparatus and control method. The apparatus includes a pressure chamber, a shear box, a temperature control system, a pressure application system, and a temperature-displacement corrector. The shear box is housed within the pressure chamber. The temperature control system includes a heat transfer jacket, multi-point thermometers, and a temperature controller. The heat transfer jacket is fitted over the shear box, and the multi-point thermometers are located within the cavity. The pressure application system includes a confining pressure loading device, a pressure head, and a pressure controller. The confining pressure loading device injects a confining pressure medium into the pressure chamber, and the pressure head applies a force to the shear box. The temperature-displacement corrector is electrically connected to the temperature control system and the pressure application system. This apparatus features a temperature control system to precisely regulate the temperature during the test, thereby simulating deep environments at different temperatures. Furthermore, the temperature-displacement corrector dynamically corrects the force applied by the pressure application system, reducing additional forces caused by thermal expansion or contraction and improving stress control accuracy.

The utility model relates to the technical field of foaming simulation of foam fracturing fluid, in particular to a foaming simulation device for the foam fracturing fluid. The foam fracturing fluid foaming simulation device comprises a simulation bin and a simulation crack plate located in the simulation bin, a feeding pipe is fixedly installed at the front end of the simulation bin, a control valve is fixedly installed on the feeding pipe, an access hole is formed in the rear end of the simulation bin, a detachable sealing cover is installed at the access hole, an observation hole is formed in the simulation bin, and the control valve is fixedly installed on the observation hole. A transparent glass cover is fixedly mounted at the observation opening; an environment simulation structure is mounted on the simulation bin and comprises a plurality of groups of electric heating plates which are fixedly mounted in the simulation bin and are arranged and distributed. According to the utility model, the independent temperature controller is used for controlling the plurality of groups of electric heating plates to realize partitioned temperature control in the simulation bin, the temperature gradient of different well depths can be accurately reproduced, and meanwhile, the pressure controller can stably maintain the pressure in the simulation bin, so that foam fracturing fluid is foamed in an environment with the same temperature and pressure as the underground environment, and the accuracy of experimental data is improved.

The utility model discloses a skin extrusion / ink-jet composite printing device, which belongs to the technical field of biological tissue printing and comprises a computer, a three-dimensional motion system, an ink box, an ink-jet printing head, an extrusion printing head, a temperature control substrate, an air pump and a pressure controller. The ink box is installed on the ink-jet printing head, and the ink-jet printing head and the extrusion printing head are installed on the three-dimensional motion system. The pressure controller is mounted on the air pump; the pressure controller is in air connection with the ink box and the extrusion printing head; the computer is electrically connected with the three-dimensional motion system, the ink-jet printing head and the pressure controller. The computer is used for controlling the three-dimensional motion system to move and further used for controlling ink jet of the ink jet printing head and controlling the pressure controller to output the air pressure value. The personalized skin printing device provided by the utility model is low in manufacturing cost and high in efficiency.

The utility model relates to the technical field of trioxymethylene reactor pressure detection, and discloses a trioxymethylene reactor pressure detection device, which comprises a reactor main body, a pressure detector and a display panel, a pressure controller is arranged on the reactor main body, and a reactor gas phase pipeline is arranged on the reactor main body. According to the trioxymethylene reactor pressure detection device, the pressure detector is arranged on the reactor gas phase pipeline of the reactor main body, the pressure controller is installed on the reactor main body, the pressure detector is arranged on the reactor gas phase pipeline, and the pressure controller is arranged on the reactor gas phase pipeline of the reactor main body. The internal pressure of the reactor gas phase pipeline can be detected through the pressure detector, the internal pressure of the reactor main body can be detected through the pressure controller, and the pressure difference between the two sides of the reactor silk screen layer can be obtained through the pressure controller and displayed on the display panel, so that the working condition of the reactor main body can be conveniently and quickly checked; and the blockage problem can be timely found and processed.

The invention discloses a vacuum system for microwave plasma chemical vapor deposition. Comprising a vacuum cavity body, a processor, an air inlet system and an air outlet system, wherein the air inlet system is arranged at an air inlet of the vacuum cavity and used for accurately controlling the flow and proportion of various component gases; the air outlet system is arranged at an air outlet of the vacuum cavity and used for being linked with the air inlet system and controlling the air pressure in the vacuum cavity body through the processor; and the air inlet system is formed by converging a plurality of air inlet units to the main path filter. The mass flow meter is matched with the air inlet branch and the filter, so that elements at the rear end are protected while accurate air inlet is realized, and the stability of the whole system is improved. A temperature control pipeline is formed by a pressure controller and a first air outlet diaphragm valve B20, the temperature needed by thin film deposition can be accurately controlled, and temperature control is simple and convenient. The state requirement and maintenance of the vacuum cavity can be met, and accurate control over the temperature is achieved through accurate control over air inlet and outlet.

A method for actuating a mechanism in a brake booster unit. The method includes: ascertaining, using a control unit of a vehicle system, whether a driver's braking request has ended or whether there is no driver's braking request; detecting, using the control unit, an operational disruption of the brake booster unit; detecting, using the control unit, an operational disruption of a pressure controller, which is connected to the brake booster unit and configured to generate a braking pressure and / or a resetting pressure at a master brake cylinder unit of the brake booster unit; generating, using the vehicle system, a predetermined minimum pressure in the master brake cylinder unit and thereby resetting the mechanism and, by the mechanism, resetting a master brake cylinder into a neutral position.

The invention provides an oil-gas pump all-in-one machine and a vehicle, and the oil-gas pump all-in-one machine comprises a driving motor which is provided with a driving shaft with two output ends; the steering oil pump is connected with a shell of the driving motor, and an input shaft of the steering oil pump is connected with the first end of the driving shaft; an input shaft of the air compressor is connected with the second end of the driving shaft through an electromagnetic clutch; the pressure sensor is connected with the steering oil pump, and the pressure sensor is used for detecting the pressure of an oil outlet of the steering oil pump; the controller is connected with a shell of the driving motor, the controller is electrically connected with the driving motor, the pressure sensor and the electromagnetic clutch, the controller is used for regulating and controlling the rotating speed of the driving motor according to the pressure of the oil outlet, and the controller is further used for controlling combination and separation of the electromagnetic clutch. According to the scheme, dynamic adjustment of the oil pressure of the steering oil pump is achieved, and the technical problem that dynamic control over the oil pressure of the steering oil pump cannot be achieved in the prior art is solved.

The embodiment of the application provides a kind of digital hydraulic closed pump control system and its control method, it can be applied to hydraulic transmission and control technical field, the system includes: closed hydraulic circuit, with high-pressure side oil circuit and low-pressure side oil circuit;Digital hydraulic valve group includes cartridge valve between high-pressure side oil circuit and low-pressure side oil circuit, cartridge valve has control cavity, the pressure in control cavity is used to control the conduction state of cartridge valve, multiple high-speed switch valve is connected with the control cavity of cartridge valve, for controlling the pressure of control cavity;Controller is configured to: when the pressure gradient of high-pressure side oil circuit exceeds limit value, multiple high-speed switch valve is output first control signal to drive multiple high-speed switch valve to adjust the pressure in control cavity, to make high-pressure side oil circuit and low-pressure side oil circuit at least partially conductive;When the pressure gradient does not exceed limit value, multiple high-speed switch valve is output second control signal to drive multiple high-speed switch valve to make cartridge valve keep closed state.

The present invention relates to the technical field of reducers, and discloses a reducer shaft seal structure with a compensation function, comprising a main body, an inner cavity formed therein, a rotating shaft inside the main body, and an auxiliary pressure controller, comprising: a limit frame, installed in the inner cavity; a pressure control ring, sleeved on the rotating shaft, slidably installed in the limit frame, the pressure control ring and the inner cavity forming a dynamic seal; wherein, when the internal pressure of the main body changes positively or negatively, the pressure control ring moves along the axial direction of the rotating shaft in response to the pressure change, and its motion trajectory is constrained by the limit frame. The present invention controls the internal pressure fluctuation within a certain degree through the axial displacement compensation mechanism of the pressure control ring. This design reduces the leakage rate of lubricating oil, especially in high dust environments where the reducer air vent is clogged or the design is unreasonable. In addition, it maintains a stable state for use in various environments, the axial movement resistance of the control ring is small, and the service life of the oil seals inside and outside the control ring is extended.

An air bag universal detection device relates to the field of detection device. The air bag universal detection device includes a test box with multiple casters on the bottom, the outer wall of the test box is respectively connected with an inflation interface, an air extraction interface and a drainage interface, the inner bottom of the test box is fixedly connected with at least two air compressors, an air storage tank and a double valve pressure controller, the exhaust port of each air compressor is connected with the air storage tank through a first connecting pipe provided with a first electromagnetic valve, the air storage tank is respectively connected with the inflation interface, the air extraction interface and the drainage interface through a second connecting pipe, a third connecting pipe and a fourth connecting pipe, the second connecting pipe is sequentially connected with a filter, a proportional flow valve and the double valve pressure controller away from the air storage tank, the third connecting pipe is sequentially connected with a second electromagnetic valve and a vacuum generator away from the air storage tank, and the fourth connecting pipe is provided with a third electromagnetic valve. The air bag universal detection device has the advantages of convenient movement, high detection efficiency and precision, adaptation to performance detection of multiple models of air bags and no need of external gas cylinders.

The invention belongs to an atomization device, and provides a miniaturized liquid atomization device and a control method thereof in order to solve the technical problems that an existing cylinder valve is unchanged in replacement, low in safety and incapable of achieving zero leakage. The liquid cavity is communicated with the gas cavity through an on-off device, an atomizer device and a pressure controller in sequence, the gas cavity is communicated with the outside through a switch device and a pressure reducing device in sequence, an outlet of the pressure reducing device is communicated with the outside, and the on-off device, the atomizer device and the pressure controller are integrally arranged between the liquid cavity and the gas cavity. The switching device and the pressure reducing device are integrated at the gas cavity outlet. While the weight is reduced, the leakage risk is greatly reduced.

The application discloses a pressure controller, which comprises a shell, a working part and a switch part, the switch part comprising a movable contact, a first static contact and a second static contact, the switch part comprising a mounting part, a transmission part and a jump function part, the transmission part being in transmission connection with the mounting part, and the movable contact being in fixed connection with the mounting part; the transmission part comprising a limiting structure, the jump function part comprising a fixed end and a movable end, the fixed end being fixed in position relative to the shell, and the movable end being connected with the mounting part; when the pressure controller is switched from a first working state to a second working state, the working part moves upwards and abuts against the transmission part, the transmission part drives the mounting part to move upwards, and the movable contact is in contact with the first static contact; when the pressure controller is switched back to the first working state, the working part falls back, the transmission part moves downwards, the limiting structure abuts against the mounting part and drives the mounting part to move downwards, and the movable contact is in contact with the second static contact. Through the above structure design, the force distribution of the switch part is optimized, and the service life of the switch part is prolonged.

This invention discloses an intelligent portable variable-energy continuous-power penetrometer, belonging to the technical field of engineering testing equipment. The intelligent portable variable-energy continuous-power penetrometer includes a probe handle and a probe rod, and further includes: a probe base connected to the probe rod, the probe base having an inner cavity; a force sensor disposed within the inner cavity; a probe cone with a pressure block at the top, the pressure block being slidably connected to the side wall of the inner cavity, and the pressure block abutting against the force sensor; and a controller electrically connected to the force sensor, the force sensor being used to detect the real-time pressure on the pressure block, and the controller being electrically connected to a display, the controller being used to control the display to show the real-time pressure. This intelligent portable variable-energy continuous-power penetrometer ensures that even when the probe rod is deflected, i.e., when the soil is in contact with the probe rod, the frictional force of the soil on the probe rod will not affect the detection of the soil's mechanical properties, thus guaranteeing the accuracy of the measurement results.

The utility model provides a kind of pantograph overhauling circuit, comprising first air switch, first fuse, first button, second button, first relay, second relay, third relay, first time relay, second time relay, first indicator light, second indicator light, first pressure controller, first differential pressure controller, first solenoid valve;The utility model is innovative design to air path and circuit, when opening U9 valve simulation air path leaks, solenoid valve is disconnected and closed, and total wind source is cut off.Real-time detection and safety control to air path are realized, problems in air path system can be found in time and handled through this innovative scheme, to avoid the occurrence of safety accident, pantograph overhauling work is provided with more safe and reliable guarantee.

The invention discloses an integrated leakage monitoring device with high applicability. The integrated leakage monitoring device with high applicability comprises a metal connecting pipe, a jacket nut, a flexible connecting pipe assembly, a four-way connector, a stop valve, a threaded diaphragm pressure controller, a pressure gauge and a sealing washer, the metal connecting pipe is used for connecting tested equipment and the flexible connecting pipe assembly, the end, connected with the tested equipment, of the metal connecting pipe is provided with a connecting threaded connector, and the end, connected with the flexible connecting pipe assembly, of the metal connecting pipe is provided with a jacket nut and a sealing washer. The flexible connecting pipe assembly is used for connecting a metal connecting pipe and a four-way connector, the end connected with the metal connecting pipe is provided with a connecting threaded connector, and the end connected with the four-way connector is provided with a jacket nut and a sealing washer. The four-way connector is used for connecting the flexible connecting pipe assembly, the threaded diaphragm pressure controller, the stop valve and the pressure gauge; one end of the threaded diaphragm pressure controller is connected with the four-way joint, and the other end is connected with the pressure monitoring electric interface; one end of the stop valve is connected with the four-way connector, and the other end is a drainage outlet.

This utility model discloses a cable rewinding protection device for an electric loader, including multiple magnetic blocks mounted on the side plate of the drum and a sensing probe mounted on the rear frame. It also includes a pressure controller, a stop detection controller, and a stop relay. This utility model detects a stop by sensing the magnetic blocks that rotate with the drum. When a stop occurs, an emergency stop braking control circuit controls the loader to brake, thereby preventing the loader from continuing to retreat and causing cable damage due to the drum stopping. This utility model also has the advantages of simple structure, low cost, and high reliability.

The invention discloses a steam drum pressure gradient control method and related equipment, and relates to the technical field of industrial process control, and the method comprises the steps: obtaining a real-time pressure value of a steam drum; under the condition that the real-time pressure value is larger than or equal to the preset first pressure value, a first pressure controller is controlled to adjust the opening degree of a pressure adjusting valve of the steam pocket, so that the real-time pressure value reaches a target pressure value; a second pressure controller is controlled to conduct gradient adjustment on the opening degree of a diffusion adjusting valve of the steam pocket so that the real-time pressure value of the steam pocket can be decreased in a stepped mode; under the condition that the opening degree of the diffusion adjusting valve of the steam pocket is larger than a preset opening degree threshold value, the opening degree of a water supplementing adjusting valve of the steam pocket is increased; and under the condition that the real-time pressure value is lower than a second preset pressure value, the diffusion adjusting valve is closed, and the second preset pressure value is smaller than the first preset pressure value.

The invention discloses an angle correction mechanism for negative angle machining, and relates to the field of negative angle machining. The angle correction mechanism for negative angle machining comprises a fixed table, a recognition device, a first correction rod, a second correction rod, a first monitoring device, a mounting frame, a workpiece pushing claw and a conveying piece. According to the angle correction mechanism for negative angle machining, the structure that the first monitoring device is installed on the upper pressing die in the negative angle machining device is adopted, and before a workpiece is corrected, the static distances between the first monitoring straight groove and the second monitoring straight groove are obtained through the first displacement sensor and the second displacement sensor; in the negative angle forming process, the dynamic distance between a second displacement sensor and a second monitoring straight groove is obtained through the second displacement sensor, data are transmitted to a medium-pressure controller through a transmission piece, the medium-pressure controller processes and evaluates the data, whether the movable plate in the negative angle machining device drifts due to long-term use or not is judged, and the negative angle forming process is completed. The correction mechanism failure is effectively avoided.