49results about How to "Avoid pressure fluctuations" patented technology

The invention relates to the technical field of valves, and discloses a self-adaptive flow proportion stop valve which comprises a valve body, a valve rod, a valve rod, a valve rod and a valve rod. The liquid inlet pipe is used for introducing fluid into the stop valve, and the liquid inlet pipe is fixedly connected to the left side of the valve body; and the liquid outlet pipe is used for discharging the fluid from the stop valve. According to the stop valve self-adaptive to the flow proportion, the cutting mechanism is arranged, when liquid passes through the impeller, the impeller is driven to rotate clockwise, and the cutting column rotates reversely relative to the impeller, so that pressure fluctuation in the liquid flowing process can be effectively relieved, the water hammer effect or impact caused by sudden pressure change is reduced, and other assemblies in a system are protected; particularly, when the liquid flow is large or the flow speed is high, the rotating action of the cutting column rotating reversely relative to the impeller is beneficial to generating a resistance mechanism in the liquid flowing process, and the reverse power action can consume part of kinetic energy of the liquid, so that sudden pressure fluctuation possibly generated in the fluid is relieved.

The utility model discloses a CDU liquid cooling data center water cooling system, which belongs to the technical field of data center water cooling and comprises a frame body, and an ATS dual-power control cabinet, a PLC control cabinet and a plate heat exchanger are arranged in the frame body. The primary side water inlet pipe fitting is provided with two filters; the primary side water return pipe fitting is provided with a proportioning valve; the secondary side water inlet pipe fitting is provided with two filters; the secondary side water return pipe fitting is provided with a degassing tank, a safety valve and two power pumps; a system make-up pump is arranged between the degassing tank and the water tank; the safety valve is connected with the water tank. The expansion tank can avoid pressure fluctuation caused by water loss or temperature change; a system make-up pump pumps water in the water tank, and system pressure sudden drop caused by a large amount of water shortage is avoided; the safety valve is connected with the water tank to avoid sudden rising of system pressure; redundant design of no shutdown and no power failure when parts are damaged can be achieved, and maintenance and replacement without shutdown can be achieved. And the proportion adjusting valve is adjusted, cold supply adjustment is achieved, and the application range is wide.

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 invention discloses a pump body assembly, a compressor and air conditioning equipment, and relates to the technical field of compressors, the pump body assembly comprises a first air cylinder, a second air cylinder and a partition plate, and an exhaust hole of the second air cylinder communicates with a backpressure cavity through an air guide channel; the cross section area of the air guide channel is S1, the cross section area of the exhaust hole of the second air cylinder is S2, and the ratio of S1 to S2 meets the relation that S1 / S2 is larger than or equal to 0.3 and smaller than or equal to 1.2. The length of the air guide channel is L, the diameter of the air guide channel is D, and the ratio of L to D is 1 < = L / D < = 5. According to the scheme, by limiting the ratio (S1 / S2) of the sectional area S1 of the air guide channel to the area S2 of the exhaust hole of the second air cylinder, enough air flows to the back pressure cavity, and therefore the pressure of the back pressure cavity is maintained; the ratio (L / D) of the length L to the diameter D of the communicating hole reduces the pressure loss in the gas flowing process, and the problem that the slip sheet is separated from the outer diameter of the piston roller can be solved.

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 utility model discloses a recovery device for a low-temperature liquid oxygen storage tank, and relates to the field of accessories of the low-temperature liquid oxygen storage tank. According to the recovery device for the low-temperature liquid oxygen storage tank, due to the fact that the liquid oxygen evaporation recovery assembly comprises the recoverer shell, the supporting base, the one-way valve, the booster pump, the L-shaped bent pipe, the low-temperature cooler and the heat insulation cover, low-temperature liquefaction work can be conducted on oxygen evaporated in the low-temperature liquid oxygen storage tank when the recovery device is used; the pressure fluctuation in the tank body can be avoided, meanwhile, waste of stored oxygen can be avoided, the waterproof and dustproof recovery heat dissipation assembly comprises an arc-shaped cover plate, a circular open groove, a sealing installation ring, a circular dustproof cover, a waterproof cover plate, a heat dissipation fan and a confluence cover, and heat generated by the recovery device can be rapidly discharged in the using process; therefore, the use stability and the recovery efficiency of the recovery equipment are guaranteed, and meanwhile, water and dust can be prevented from corroding the recovery equipment while heat dissipation is conducted.

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 static pressure vibration suppression structure comprises a fixed part and a movable part corresponding to the fixed part, a pressure equalizing groove is formed in the end face of the fixed part, a static pressure throttling structure is arranged in the pressure equalizing groove and penetrates through the back face of the fixed part, and a vibration suppression flow guide table is arranged on the end face of the movable part. The vibration suppression flow guide table is of a protruding structure with a large base portion and a tip peak-shaped end portion, the tip end of the vibration suppression flow guide table faces the pressure equalizing groove, the tip end and the two sides of the vibration suppression flow guide table are windward sides, and the windward sides can quickly guide airflow to the outlets in the two sides. The flow guide function is strengthened, gas is guided to the two sides in time, direct impact with the end face is avoided, speed loss is reduced, meanwhile, the flow guide structure guides the gas to the two sides in time, vortex caused by long-time staying of high-speed fluid and low-speed fluid in the pressure equalizing cavity is avoided, and the pressure equalizing effect is improved. Good effects of improving the gas pressure fluctuation characteristic in the pressure equalizing tank and inhibiting the cyclone phenomenon are achieved; the static pressure vibration suppression structure is wide in application.

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 invention relates to the technical field of preparation of chemical surfactants, in particular to a preparation device for a chemical surfactant. The device comprises a laying module, a pressure detection module, an analysis module and a control module. According to the invention, when the neutralization reaction of the surfactant is carried out, the pressure distribution and change in the reaction kettle are accurately analyzed, and the pressure data monitored by the pressure detection module is analyzed, so that problems are found in time, corresponding measures are taken, and when the pressure distribution is not uniform, the pressure is accurately detected through the plurality of pressure sensors in the reaction kettle. Pressure readings at different positions are obtained in real time, the pressure is compared with a threshold value, when the pressure is small, the interval of the sensors is increased, so that the pressure change in the reaction kettle is monitored more accurately, it is ensured that the pressure change can be found in time, and when the pressure is large, the pressure change can be accurately detected by analyzing reasons, checking the stirring speed and the bubble generation condition and adjusting operation conditions in time. Therefore, uniform pressure distribution in the reaction kettle is ensured, and the reaction safety and efficiency are ensured.

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 invention relates to the technical field of pressure containers, and discloses a pressure-adjustable pressure container which comprises a pressure tank and further comprises a pressure regulator fixedly arranged at the top of the pressure tank, an outer shell fixedly clamped to the top end of the pressure tank and a limiting pipe arranged in the outer shell. The two ends of the extrusion rod are both located in the extrusion sleeve disc, the transmission part comprises an initial position and a set position, and when the transmission part is located at the set position, the sealing part is attached to the closing part. Effective sealing is achieved through the sealing piece and the sealing piece, the sealing piece firstly gets close to the sealing piece through the transmission piece, the distance between the sealing piece and the sealing piece is shortened, then the transmission piece controls the sealing piece to move, the sealing piece is attached to the sealing piece, the impact resistance of a system is improved, and it is guaranteed that under the condition of flow fluctuation, the sealing piece can be effectively sealed. The pressure tank can achieve pressure balance all the time, and meanwhile the efficient and safe operation state is kept.

The utility model relates to a constant-flow non-disturbance furnace changing system for a blast furnace hot blast stove. The system comprises a compressed air main pipeline, a cold air main pipeline, an air supply pipeline, a branch stamping pipeline and a branch cold air pipeline, according to the constant-flow non-disturbance furnace changing system for the blast furnace hot blast stove, cold air pressurizing and compressed air pressurizing of the air feeder II are connected in parallel and are mutually standby systems, so that normal furnace changing and running of the hot blast stove when any pressurizing system breaks down are guaranteed; besides, compressed air is obtained by arranging an independent air compressor, so that the compressed air is independent of a compressed air conveying system in the steel mill, and two or more air storage tanks are arranged to ensure the pressure of the compressed air at the output end and play roles in stabilizing pressure and buffering, so that pressure fluctuation in a compressed air main pipeline in the steel mill can be thoroughly avoided, and the service life of the steel mill is prolonged. And safe gas use of other production departments is guaranteed, meanwhile, potential safety hazards caused by frequent fluctuation of pressure in the compressed air pipeline are reduced, and practicability is high.

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.