29results about How to "Avoid pressure fluctuations" patented technology

The utility model discloses a textile color fastness testing arrangement relates to color fastness testing arrangement technical field, and its technical scheme is: including frame component, be equipped with test drive assembly in frame component, test drive assembly top is equipped with test movable assembly, frame component top is equipped with test pressure assembly, and the beneficial effect of a kind of textile color fastness testing arrangement is: through electric push rod in test pressure assembly provides controllable driving force, cooperate pressure sensor and pressure display to realize the real -time monitoring and accurate adjustment of friction pressure, replace traditional pressure plate deadweight pressure mode, effectively avoid the pressure fluctuation caused by mechanical vibration, sample surface unevenness etc., ensure that actual friction pressure is consistent with preset value, greatly improve the accuracy and repeatability of test result, simultaneously, operator can adjust pressure value according to different textile types quickly, need not to replace pressure plate, and operation efficiency is significantly improved.

The application discloses a high-temperature gas safety valve with pressure relief protection and relates to the field of safety valves.The safety valve housing is provided with an inlet at the left side, and an outlet at the bottom; a pressure relief pipe is communicated with the right outer wall of the safety valve housing, a liquid cooling delivery box is fixedly installed at the lower end of the pressure relief pipe, a one-way gas outlet nozzle is installed at the right end of the pressure relief pipe, and is used for discharging gas. The high-temperature gas safety valve with pressure relief protection is provided with a pressure relief pipe and a multistage pressure relief mechanism, a one-way gas inlet assembly is used for guiding gas to enter step by step, a middle pressure relief assembly is used for buffering and decompressing, and a one-way gas outlet assembly is used for stably discharging, so that scalding hazards are further avoided; the heat-resistant sealing piece on the outer side of the disc, the synchronous linkage design of the opening mechanism and the elastic buffering effect of the buffering mechanism ensure that the valve is sensitive in action under high pressure, and the risk of jamming or failure is reduced.

The application relates to the technical field of multistage compression, in particular to a hydrogen pressurizing equipment based on a multistage compression technology, which comprises a plurality of series-connected pressurizing parts and a central control module for regulation and control. The application guarantees pressure stability in the pressurizing process by arranging pressure stabilizing pipes between the vortex pipes, so that the plurality of vortex pipes can be connected in series, and the central control module is arranged to accurately monitor the pressure of the pressure stabilizing chambers in the pressure stabilizing pipes and the compression chambers in the vortex pipes, accurately control the pressure state of each pressurizing part, accurately match the multistage pressurizing, and adjust the temperature of the internal compressed gas by cooperating with the cooling pipe layer, so that pressure fluctuation caused by gas temperature change is effectively avoided; the vortex compression structure effectively reduces the vibration and noise of the whole equipment, and the series connection of the pressurizing parts can be selected in number, so that the flexibility of the multistage compression is further improved.

The application relates to the technical field of throttles, in particular to a fishing-free throttle, which comprises a main body, slips, a connecting sleeve, a fishing head, a sealing cylinder and a sandproof cover. A plurality of slips are arranged in a ring shape on the main body. The connecting sleeve is arranged in the main body. The fishing head is inserted into the connecting sleeve and connected with the connecting sleeve. The connecting cylinder is arranged in the main body. The sealing cylinder is arranged on the connecting cylinder. The sealing cylinder is jointly arranged with the main body and is provided with a sealing gasket. The sandproof cover is arranged below the sealing cylinder. The valve core and the air nozzle are arranged in the sealing cylinder. The air nozzle is slidably connected with the sealing cylinder through a sealing ring. The air nozzle and the sealing cylinder are connected with a shearing spring. The valve core comprises a fixed core and a movable core. The valve core is divided into the fixed core and the movable core. When the pressure is reduced, the movable core is driven to move by the air nozzle to increase the throttling passage of the valve core, so that the fishing-free throttle is realized, and the yield of the oil and gas well can be ensured.

The invention discloses a drawer type descending feeding system which comprises a feeding sealing-tape machine, a drawer type descending feeding device, a drawer type descending feeding device and a drawer type descending feeding device. The slurry scraping structure is used for scraping attachments on the feeding adhesive tape; the supporting structure is used for supporting the feeding sealing-tape machine; the slurry scraping structure comprises an elastic mechanism used for controlling the position of a scraper and absorbing vibration through elastic force. The supporting structure comprises a pulley module used for moving and a supporting plate module used for supporting, and the supporting structure makes contact with the mounting face through one of the pulley module and the supporting plate module. Impact energy is absorbed through the elastic mechanism, the scraper is prevented from being damaged as much as possible, the service life of the scraper is prolonged, and constant contact pressure of the scraper is maintained; the pulley module and the supporting plate module support alternately, so that the bearing time of the pulley module is shortened, the pulley module is protected, and the service life of the pulley module is prolonged.

The utility model discloses a kind of high-level oil tank constant pressure compensation devices, comprising: for storing emergency lubrication oil high-level oil tank box;Further comprising: main oil pipeline assembly, main oil pipeline assembly is connected on the oil inlet of high-level oil tank box;Overflow pipeline assembly and constant pressure compensation component, overflow pipeline assembly and constant pressure compensation component are connected on the oil outlet of high-level oil tank box by three-way joint;Constant pressure compensation component includes buffer oil reservoir, conical sealing cover, sealing ball and breather cap, the oil inlet of buffer oil reservoir is communicated with the third interface of connecting three-way joint, conical sealing cover is sealedly connected with the oil outlet of buffer oil reservoir, conical sealing cover top is equipped with conical hole, breather cap is installed in the upper opening of conical hole;Sealing ball is float ball structure and is located in buffer oil reservoir, sealing ball can be cooperated with conical hole and form one-way seal.The utility model can realize effective sealing and overflow when oil is supplemented, pressure flow stability in emergency.

This utility model relates to the technical field of water circuits in coffee machines, proposing a coffee machine that combines anti-dry-burning and efficient steam output, comprising: a preheating pot for preheating cold water; a water pump connected to the preheating pot to input cold water into the preheating pot; a coffee pot for heating liquid and connected to the preheating pot, where cold water is heated and then reheated; and a steam pot for heating liquid to output steam, connected to the coffee pot, and equipped with a water level probe to detect the liquid level and prevent dry-burning. When the water level in the steam pot is below a detection threshold, the liquid is replenished into the steam pot after being heated by the water pump, preheating pot, and coffee pot. The connection between the steam pot and the coffee pot allows it to directly receive hot water from the coffee pot, significantly shortening steam heating time, reducing steam pressure fluctuations, and ensuring stable and continuous steam output.

The invention relates to a cooling and water metering control system and a cooling and water metering control method. The cooling and water metering control system comprises a heat exchange device and a water metering device, wherein the heat exchange device is used for regulating the temperature of fermented grains in a heat exchange manner; the water measuring control device is used for controlling the water content of the fermented grains, the equipment controller is respectively in signal connection with the heat exchange device and the water measuring control device, the heat exchange device comprises a reaction container and a negative pressure source, the reaction container is used for accommodating the fermented grains and has a stirring function, and the negative pressure source is used for providing a negative pressure suction effect for the reaction container; the equipment controller is configured to control working parameters of the negative pressure source according to changes of the temperature and the moisture content of the fermented grains in the reaction container, and the working parameters of the negative pressure source comprise output power and starting time duration. The method can solve the problems that the moisture and temperature of the fermented grains entering the cellar cannot be accurately controlled and the yield and quality stability of the white spirit cannot be ensured in the prior art.

This utility model relates to the field of silicon carbide production technology and discloses a high-efficiency reactor for silicon carbide smelting, including a reactor and a feed pipe fixedly connected to the top of the reactor. Heating pipes are installed on the outer surface of the reactor. A tail gas treatment mechanism is provided on the right side of the reactor. The tail gas treatment mechanism includes an inlet box, a cylinder, a piston, a first vent pipe, a first check valve, a purification box, a purification filter element, a second vent pipe, a double-way valve, a cleaning pipe, a third vent pipe, and a third check valve. This high-efficiency reactor for silicon carbide smelting employs a multi-stage purification process through the tail gas treatment mechanism. First, the composite purification filter element in the purification box filters out 1-5μm dust particles in the tail gas and preliminarily adsorbs organic harmful gases. Then, the tail gas entering the adsorption box is fully contacted by the purification liquid atomized by the spray ring nozzles, which neutralizes acidic harmful gases such as sulfides in the tail gas. Furthermore, the gas-liquid separation layer in the adsorption box prevents the purification liquid from escaping with the tail gas.

The invention discloses a multi-path inlet and outlet booster pump, which belongs to the field of supercharging devices, and comprises a first cavity, a second cavity, a first oil inlet passage, a first oil outlet passage and at least two oil guide passages positioned between an end cover and a reversing valve body, one end of an oil guide passage is connected with the second cavity, and the other end is connected with hydraulic oil outside the booster pump; one end of the other oil guide passage is connected with the first cavity, and the other end is connected with hydraulic oil outside the booster pump; when the pressurizing piston reverses, external hydraulic oil smoothly enters and exits the pressurizing cavity under the common buffering effect of the at least two oil guiding channels. The at least two oil guide channels located between the end cover and the reversing valve body are arranged to provide oil storage, oil inlet and outlet oil path buffering generated during reversing of the pressurizing piston is provided for hydraulic oil in the first cavity and the second cavity, and sudden pressure change at the moment of oil inlet and oil outlet is avoided; and oil storage and pressure balance on the oil inlet side and the oil outlet side are achieved.

The invention provides a pressure adjusting method and device, electronic equipment and a storage medium. A load change signal of a steam turbine and main steam pressure of a boiler are monitored, and whether a main steam pressure set value is locked or not is judged based on the load change signal; under the condition that it is determined that the main steam pressure set value is locked, the air exhaust flow needing to be subjected to pressure compensation on the boiler is determined, and pressure compensation is conducted on the boiler according to the air exhaust flow; and based on the load change signal and the main steam pressure, the pressure change optimal rate is calculated, and the main steam pressure of the boiler is adjusted according to the pressure change optimal rate. Compared with the prior art, it can be ensured that the boiler operates under the optimal working condition, and the combustion efficiency and the heat efficiency are improved; according to the optimal pressure change rate calculated according to the load change signal and the main steam pressure, the main steam pressure of the boiler is adjusted, energy efficiency loss caused by too fast or too slow pressure change can be avoided, and the operation efficiency of the boiler is further optimized.

The utility model relates to a control valve device for a lithium battery formation process, which comprises a control valve main body, a motor driving module and a control module, the driving end of the motor driving module is connected with a push rod valve core to drive the push rod valve core to act, and a push rod valve core positioning pin is inserted beside the push rod valve core; the control module comprises a control box, a control panel, a zero position detection sensor and an external signal receiving module, the control panel is arranged in the control box, the zero position detection sensor is embedded in the side of the control box and located on the side of the push rod valve element positioning pin so as to detect the position of the push rod valve element positioning pin, and the zero position detection sensor is electrically connected with the control panel; the external signal receiving module is embedded in the control box and is electrically connected with the control panel; and the control panel is electrically connected with a control signal input end of the motor driving module. The device is beneficial to quickly, accurately and stably controlling the pressure in the battery formation process.

The utility model belongs to the technical field of compressed air drying and filtering equipment, and relates to a multi-stage separation stable pollution discharge precise filtering device which comprises a coarse separation assembly and a precise separation assembly which are mutually matched and connected, and an outlet of the coarse separation assembly is hermetically connected with an inlet of the precise separation assembly; the coarse separation assembly comprises an upper tank body, one axial end of the upper tank body is in threaded connection with an upper cover body, a flow guide structure is fixed in the upper cover body, an upper flow guide space is formed between the flow guide structure and the upper tank body, the upper cover body is provided with an inclined inlet, and the inlet is communicated with an inner cavity of the upper tank body; the fine separation assembly comprises a lower tank body, the lower tank body and the upper tank body are connected through a connecting flange, a filter element is installed on the connecting flange and communicated with the upper tank body and the lower tank body, and the connecting flange is provided with an outlet; filler is laid at the bottom of the lower tank body, a pressing plate is arranged on the filler, and a pollution discharge connector is arranged at the lower end of the lower tank body. According to the filtering device, oil, water and other liquid drops in gas can be effectively removed, secondary pollution caused by gas flow impact is avoided, and the quality of outlet gas and the working efficiency are improved.

The utility model relates to a kind of bulking equipment for corn processing, including fixed subassembly, bulking subassembly and transmission subassembly, fixed subassembly includes heat insulation cylinder, it is fixedly arranged, heat insulation cylinder is sealed and rotationally arranged with heat conduction cylinder, at least heater is arranged in heat insulation cylinder;Bulking subassembly includes motor, it is fixedly arranged, the output end of motor is fixed with screw conveyor, screw conveyor rotationally arranged in heat conduction cylinder;Transmission subassembly includes gear ring, it is fixed with heat conduction cylinder using heat insulation pad, the transmission end of screw conveyor is sealed and penetrates heat conduction cylinder and is fixed with center tooth, center tooth and gear ring are engaged with steering tooth, heat insulation cylinder one end is fixed with planet carrier, center tooth and steering tooth are rotatably sleeved in the both ends of planet carrier.In the application, corn realizes automatic quantitative feeding in the process of bulking, and the uniform feeding amount makes corn heated consistently, while avoiding the pressure fluctuation between corn, thereby reducing the phenomenon of insufficient bulking or excessive bulking.

This application discloses a wind turbine blade injection device and equipment. The wind turbine blade injection device includes a mold, a lifting mechanism, an injection assembly, a sensor, and a controller. The lifting mechanism includes a drive component and a lifting platform. The drive component moves the lifting platform along the height direction of the mold. The injection assembly includes a buffer bag, a first guide pipe, and a second guide pipe. The buffer bag is placed on the lifting platform and is connected to the injection glue machine through the first guide pipe and to the guide channel through the second guide pipe. The sensor detects the liquid level injection height within the mold. The controller is electrically connected to both the lifting mechanism and the sensor. Based on the liquid level injection height information detected by the sensor, the controller controls the drive component to adjust the height of the lifting platform so that the height of the buffer bag matches the liquid level injection height. The technical solution provided by this application can ensure uniform resin injection, reduce problems such as uneven resin flow and residual air bubbles, and improve the quality of blade molding.

The utility model relates to water tank technical field especially relates to an expansion type water tank. Its technical scheme includes the box, the water inlet of being located at the top of box, the water outlet of being located at the bottom of box, still includes the fixed installation in the telescopic expansion box of box, installs the constant pressure module of expansion constant pressure to the expansion box of both sides of box, the constant pressure module includes the transmission case and pressure chamber that intercommunication, the pressure chamber and transmission case fill liquid, the transmission case in sliding installation has with expansion fixed connection of sealing plate of box. The utility model adopts constant pressure module and can provide stable unchangeable system pressure, compares with nonlinear air bag, avoids pressure fluctuation, makes system pressure keep constant on the set operating point, no matter how much expansion water volume is, avoids the risk that air bag pressure sharply climbs in high pressure area, also eliminates the hidden danger that low pressure area buffer is insufficient, improves system pressure stability greatly, can realize effective volume utilization more.

The utility model discloses a pressure-regulating grinding head and grinding equipment. The pressure-regulating grinding head comprises a grinding tool, a power assembly and a pressurizing assembly, the grinding tool makes contact with a to-be-machined workpiece, the power assembly drives the grinding tool to a preset station, and the pressurizing assembly adjusts the pressure between the grinding tool and the to-be-machined workpiece and is arranged in the power assembly. The pressurizing pipeline is arranged in the grinding head, so that extra space occupied by an external pipeline is eliminated, the whole grinding device is more compact, and assembling in a limited space is facilitated. And due to the design of the built-in pipeline, the grinding head is not limited and hindered by an external pipeline when moving and overturning, and the flexibility and the operation efficiency of the grinding tool are improved. The built-in pipeline and the grinding head move synchronously, so that pressure fluctuation caused by asynchronism of inertia force and a grinding tool is avoided. And in addition, the shape and angle change of the internal pipeline are effectively controlled, and the pressure fluctuation is further reduced, so that the stability of the pressure applied to the grinding tool is improved.

The invention discloses a compression type high-temperature heat pump system with energy storage and enthalpy compensation functions. The system comprises a compressor, a condenser, an ejector, a gas-liquid separator, an expansion valve, an evaporator, an intermediate heat exchanger and a heat accumulator. The system can achieve switching of two operation modes, namely a supercooling energy storage mode and an energy releasing and enthalpy supplementing mode, the different operation modes are switched according to the operation working condition of the system and the energy storage condition of the heat accumulator, during energy storage, the supercooling energy storage mode is switched, and energy storage is conducted on the heat accumulator through the supercooling capacity of working fluid at an outlet of a condenser; and during energy release, an energy release and enthalpy compensation mode is switched, the mass flow of the steam injection branch is enhanced by utilizing heat in the heat accumulator, and the heat supply capacity and the operation performance of the system are enhanced.

The invention relates to the technical field of liquid supply pipelines, in particular to a mining remote liquid supply pipeline multi-pump cooperative pressure control method which comprises the following steps: firstly, acquiring multi-pump operation data through intelligent sensing equipment, performing characteristic analysis in combination with target process parameters, and extracting liquid supply pressure characteristics; and then, performing control interaction on multiple pumps by utilizing the target parameters and the pressure characteristics, and analyzing real-time pressure demand information. And performing cooperative calculation based on the demand traversal pressure characteristics, and formulating a multi-pump cooperative control strategy. A simulation execution mechanism is innovatively introduced, real-time monitoring is conducted on the strategy before the strategy is issued, a simulation result is generated, the control strategy is dynamically optimized and updated according to the result, and finally intelligent cooperative pressure control over the multiple pumps is achieved. According to the method, the problems of uneven multi-pump pressure, response lag, high energy consumption and the like in traditional control are effectively solved, and the stability, the safety and the energy efficiency level of the system under complex working conditions are improved through simulation, monitoring and closed loop correction.

The utility model discloses a stability maintaining assembly of a blast furnace coal injection pulverized coal filter for an iron making plant, which comprises a coal injection header pipe, a coal injection pipe A, a coal injection pipe B, a pulverized coal filter, an inlet normally-open standby valve, an outlet normally-open standby valve, an inlet working valve, an outlet working valve, a blow-down branch pipe, a blow-down header pipe, a blow-down valve and a blow-down valve, the inlet normally-open standby valve and the outlet normally-open standby valve are both provided with portable mechanical locks, the air inlet end of the purging valve is connected with a nitrogen spraying device, and a blow-down branch pipe on the rear side of the blow-down valve is sequentially provided with a detection valve A and a detection valve B; a plurality of groups of pulverized coal collecting devices are arranged on the blowdown main pipe and are connected with the blowdown main pipe through blanking valves. According to the utility model, after practical application, even if misoperation occurs, harm caused by misoperation can be avoided, essential operation safety is achieved, maintenance can be completely realized, and the situation that the pulverized coal collector is full of leaked pulverized coal is avoided.

The utility model discloses a kind of double-color plastic product secondary forming injection mould, belong to injection mould technical field, including injection mould and fixed pipeline, the upper surface of injection mould is fixedly connected with upper top cover, and pouring opening is arranged in upper top cover inside, and upper top cover upper surface is fixedly connected with connecting column close to the one end of pouring opening, while connecting column inner wall is fixedly connected with positioning column;The positioning column is symmetrically distributed about the center of the connecting column, the lower end of the fixed pipeline outside is fixedly connected with sealing ring, and fixed pipeline is slidably arranged in the connecting column inside.The double-color plastic product secondary forming injection mould, by the spacer plate and the shaft set, not only can ensure the color of product appearance clear and pure, but also can prevent unused plastic into mold cavity, avoid two color plastics mutual mixing, ensure that each plastic plays its expected performance in respective injection molding process, prolong the overall service life of mould.

The utility model relates to the technical field of high-temperature water electrolysis systems, in particular to a cross flow type two-in-one heat exchanger and a high-temperature water electrolysis system. The heat exchanger comprises a heat exchange core body and a distribution structure arranged on the peripheral side of the heat exchange core body. Cold fluid flow channels and hot fluid flow channels are arranged in the heat exchange core body, the cold fluid flow channels penetrate through the first direction of the heat exchange core body, the hot fluid flow channels penetrate through the second direction of the heat exchange core body, and the cold fluid flow channels and the hot fluid flow channels are alternately arranged. Fins are arranged in the cold fluid flow channel, a plurality of micro-pore plates are arranged between the fins in the first direction, a plurality of micro-pores are evenly distributed in the micro-pore plates, and the hot fluid flow channel is divided into different sealed cavities in the first direction. According to the utility model, the problems of large overall size, low heat dissipation efficiency and large instantaneous pressure impact caused by the breakage of large bubbles are solved.

The invention discloses a multi-drift-diameter valve system capable of intelligently and cooperatively switching runners and a control method of the multi-drift-diameter valve system, and belongs to the technical field of fluid control. The system comprises a cooperative controller, a plurality of valve bodies, a plurality of valve cores, a plurality of sensing arrays and a plurality of driving modules, each valve body is provided with a plurality of flow channel interfaces, the flow channel interface of each valve body is connected with the flow channel interface of the next valve body through a pipeline to form a flow channel network, the valve cores are rotatably arranged in each valve body, and the driving modules are connected with the valve cores. The valve element is connected with the driving module and used for being communicated with different flow channel connectors, a sensing array is arranged at an inlet of each flow channel connector and used for obtaining inlet pressure and instantaneous flow of the flow channel connector, the valve element is connected with the driving module, and the sensing arrays and the driving module are connected with the cooperative controller. Through energy field reconstruction and virtual impedance active control, essential smooth switching of multiple flow channels is achieved, energy consumption and mechanical wear are remarkably reduced, and the self-adaptive cooperative capability is achieved.

A pneumatically activated negative pressure drainage device and method include a collection well, which is sealed and has a sewage inlet. A negative pressure drainage pipe is installed on the collection well, extending to the bottom of the collection well where a negative pressure drainage valve is located. The negative pressure drainage valve includes a cage-like chamber with a discharge port at its bottom. A float for sealing the discharge port is located inside the cage-like chamber. The device also includes a pneumatically activated valve assembly installed at a height higher than the negative pressure drainage valve. Pipes are connected to both ends of the pneumatically activated valve assembly, connecting to the atmosphere and the lower end of the discharge port, respectively. The pneumatically activated valve assembly opens when the liquid level reaches a first set height, making the buoyancy of the float greater than the suction force of the negative pressure drainage pipe. The pneumatically activated valve assembly closes when the liquid level reaches a second set height. Through the buoyancy-driven pneumatically activated valve assembly and the negative pressure drainage valve's dual-valve linkage design, fully automatic opening and closing triggered by liquid level is achieved, eliminating the need for external power control and significantly reducing energy consumption and maintenance costs.

The utility model provides a push button water suspension mechanism and a water outlet device, and relates to the technical field of sanitary products, the push button water suspension mechanism comprises a water inlet pipe and a sliding pipe sleeved on the outer side of the water inlet pipe, the water inlet pipe is provided with a water inlet, a water outlet, a water inlet channel, a water outlet channel and a water passing hole, the water inlet channel is communicated with the water inlet, and the water outlet channel is communicated with the water outlet. The water outlet channel is communicated with the water outlet; the sliding pipe is provided with a water sealing part and a water passing cavity, and the push button is driven in an operable mode to drive the sliding pipe to move between a first position and a second position in the axial direction of the water inlet pipe, so that the water inlet and the water outlet are separated through the water sealing part or communicated through the water passing cavity; and when the water inlet is separated from the water outlet, water flow enters the water outlet channel only from the water passing hole so as to realize a water pause function. Therefore, the problems that an existing water suspension mechanism is complex in structure, multiple in parts and large in occupied space are solved.

This utility model provides a semi-hermetic refrigeration compressor body cover with an exhaust needle, relating to the field of semi-hermetic refrigeration compressor technology. It includes a cover assembly consisting of a cover body and four rotating seats arranged in a ring on the cover body. It also includes an exhaust assembly consisting of an exhaust seat fixedly connected to the top of the cover body and a threaded seat. A rubber plug is installed inside the exhaust seat, and a through hole is opened at the top of the rubber plug. Through the exhaust assembly, the exhaust seat and the threaded seat cooperate to form an exhaust channel. The inclined through holes of the rubber plug are arranged in a ring, with the angle decreasing from top to bottom towards the center. This design allows the gas to form a converged and then dispersed flow path during exhaust, ensuring smooth exhaust and achieving dynamic sealing through the elasticity of the rubber plug itself, reducing gas leakage. The inclined structure also reduces airflow impact, improves exhaust stability, and enhances overall sealing and exhaust performance.

The invention provides a water electrolysis system and a control method. The system comprises an electrolytic bath, a hydrogen-water separation system and a hydrogen drainage system, the hydrogen-water separation system comprises a hydrogen discharge branch and a water distribution branch; the hydrogen discharge branch comprises a secondary pressure regulating valve, a primary pressure regulating valve and a hydrogen-water separator; the water distribution branch comprises a hydrogen-water separator and a hydrogen-water separator drain valve; the hydrogen drainage system comprises a water collecting branch and at least one pressurizing branch; the water collecting branch comprises a water collector; the pressurizing branch comprises a pressurizing valve, one end of the pressurizing valve is connected with the water collector through a pipeline, and the other end of the pressurizing valve is connected to the pipeline between the second-stage pressure regulating valve and the first-stage pressure regulating valve through a pipeline. The pressure of the whole system can be kept unchanged in the drainage process, system pressure fluctuation caused by action lag of the hydrogen side pressure regulating valve and the oxygen side pressure regulating valve is avoided, and the situation that the service life of the electrolytic cell is affected by pressure impact on the electrolytic cell is avoided.

The invention relates to a single-order double-helix PET foamed sheet extrusion device, and belongs to the technical field of plastic processing equipment, the single-order double-helix PET foamed sheet extrusion device comprises two die bodies, one ends of the die bodies are connected with die lips, the two die bodies are jointly connected with a double-screw extruder, sliding grooves are formed in the two die lips, the sliding grooves penetrate to the opposite sides of the two die lips, and the two die lips are connected with the double-screw extruder. A sliding plate is arranged in the sliding groove in a sliding mode and connected with an adjusting plate, one end of the adjusting plate extends out of the die lip, the sliding plate divides the sliding groove into a first oil cavity and a second oil cavity, the adjusting plate extends out of the die lip from the first oil cavity, the die lip is connected with a first hydraulic cylinder, the first hydraulic cylinder is connected with an abutting plate, and the abutting plate can extend into the second oil cavity and abut against the adjusting plate. The ends, away from the die lip, of the two die bodies are jointly connected with a double-screw extruder, and a first pressurizing opening communicated with the first oil cavity and a second pressurizing opening communicated with the second oil cavity are formed in the die lip. The device has the effects of accurately controlling the thickness of the plate and improving the surface smoothness of the plate.

The present invention provides an underwater hydraulic cylinder experimental system simulating different depths, including a pressure tank, end covers for sealing are provided at both ends of the pressure tank, a fixed support structure is provided inside the pressure tank for fixing the hydraulic cylinder; a sealing port is provided on the end cover, the sealing port is used for sealing and active connection with the piston rod of the hydraulic cylinder or the extension rod of the piston rod, so that the piston rod of the hydraulic cylinder or the extension rod of the piston rod can extend out of the end cover; the pressure tank or the end cover is also provided with a pressure regulating water inlet, which is used to supply pressure liquid into the pressure tank; the pressure tank or the end cover is also provided with an oil pipe sealing port and a cable sealing port, the oil pipe sealing port is used for the pressure oil pipe to pass through and connect with the hydraulic cylinder in a sealed manner, and the cable sealing port is used for the conductive cable to pass through in a sealed manner. By adopting the above structure, liquids of different pressures can be added through the pressure regulating water inlet, thereby simulating underwater working conditions, and the provided sensor can detect the working conditions of the hydraulic cylinder.