66results about How to "Small pressure fluctuations" patented technology

The utility model relates to a secondary ink cartridge assembly for a printer, which comprises a secondary ink cartridge body, the secondary ink cartridge body comprises an ink cartridge body and an ink cartridge cover which are mutually sealed and covered, a high-pressure ink cavity, a low-pressure ink cavity and a normal-pressure ink cavity are arranged in the ink cartridge body, and the high-pressure ink cavity, the low-pressure ink cavity and the normal-pressure ink cavity are respectively provided with a liquid level sensor. The high-pressure ink cavity is sequentially communicated with the printing spray head, the low-pressure ink cavity, the normal-pressure ink cavity, the second ink pump, the bubble removing device and the first ink pump, so that ink flows out of the high-pressure ink cavity, sequentially flows through the printing spray head, the low-pressure ink cavity, the second ink pump, the normal-pressure ink cavity, the first ink pump and the bubble removing device and then flows back into the high-pressure ink cavity, and therefore a self-circulation ink path is formed. According to the secondary ink box, ink between the secondary ink box body and the printing spray head keeps continuous circulating flow, precipitation is avoided, the temperature of the ink entering the printing spray head is appropriate and constant, the bubble content is small, the pressure fluctuation is small, and therefore the printing quality is higher, and the printing effect is better.

The utility model relates to the technical field of casting, in particular to a vacuum negative pressure device for lost foam casting. According to the technical scheme, the device comprises a mounting bottom plate, a vacuum pump is arranged above the mounting bottom plate, a pressure stabilizing assembly is arranged at the position, located on the mounting bottom plate, of the air inlet end of the vacuum pump, a filtering assembly is arranged on one side of the pressure stabilizing assembly, a negative pressure pipe is arranged on a connecting pipe, and a vacuum distribution mechanism is arranged at the end, away from the connecting pipe, of the negative pressure pipe. The filtering assembly adopts a multi-layer composite filtering structure, so that impurities in gas can be efficiently removed, meanwhile, the system pressure can be monitored and adjusted in real time through an intelligent central controller in the pressure stabilizing assembly, pressure fluctuation is effectively buffered, a stable negative pressure environment is provided for lost foam casting, and the production efficiency is improved. And meanwhile, the vacuum distribution mechanism is designed in a modularized mode, negative pressure distribution can be accurately controlled according to different production requirements, the air exhaust efficiency is improved, and the production efficiency of lost foam casting and the precision of castings can be improved.

The application provides an environment simulation air extraction device cooperative optimization control method and system based on cooperative differential game, comprising the following steps: step 1, a dynamic model of the air extraction device is established. Step 2, the air supplement valve and the plurality of inlet valves are regarded as game participants, and a pressure-pressure ratio multi-objective optimization model based on cooperative differential game is constructed. Step 3, an approximate dynamic programming algorithm-critical neural network is combined to obtain an approximate Pareto optimal solution of the established game optimization model. Step 4, a cooperative optimization controller is designed: the inlet valve adopts PI control combined with a filter and an optimization item to realize cooperative control of pressure and pressure ratio. Step 5, on a multi-compressor parallel simulation platform, various complex working conditions such as valve leakage and compressor failure are set to verify the robustness and superiority of the algorithm. After the application of the technical scheme, the speed, robustness and anti-interference ability of the system based on the cooperative differential game cooperative optimization control algorithm are significantly improved.

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

The utility model relates to the technical field of pipeline construction, in particular to a movable steam blowing device for installing a small pipeline, which comprises a movable trolley and a protective frame, a steam generator and a water tank are arranged on the movable trolley, a water supply pump is arranged on the water tank, a surge tank is arranged on the steam generator, and the surge tank is connected with the protective frame. A safety valve and a barometer are arranged on the surge tank, and a purging valve is arranged on one side of the surge tank; the steam generator comprises a heating cavity and a boiling cavity, the interior of the heating cavity is in an inverted concave shape, a preheating device is arranged at the bottom of the heating cavity, the boiling cavity is located on the upper side of the heating cavity, the boiling cavity and the heating cavity are communicated through a pipeline, and a temperature control assembly is arranged in the boiling cavity; the steam blowing small pipeline is adopted, the steam generator is provided with the heating cavity and the boiling cavity, water heating is separated, efficiency is improved, meanwhile, the pressure stabilizing tank is arranged, steam pressure fluctuation is reduced, pressure storage and pulse blowing can be achieved, and functionality and practicability of equipment are improved.

The utility model relates to the technical field of silicon steel production and processing, disclose a kind of non-oriented silicon steel coating spraying device, including shell, relative arrangement is provided with smearing subassembly in the shell, the shell bottom is provided with recovery subassembly, the inside of shell is provided with spray device, the inside of shell is fixedly connected with not less than one guide roller, the smearing subassembly includes the slide rail of fixed connection in the inner wall of shell top, shell side wall is fixedly connected with electric push rod, the output end of electric push rod is fixedly connected with support plate, the bottom of support plate is fixedly connected with not less than one telescopic link, spring is equipped on the surface of telescopic link. In the utility model, through the structural setting of smearing subassembly, it solves the problem that coating is difficult to evenly cover the surface of silicon steel after the surface of silicon steel is sprayed in the prior art, coating stripe defect or the phenomenon of missing coating is prone to occur, and product quality is difficult to guarantee.

The application discloses a hydraulic system for stabilizing pressure of a hot-pressing sintering aluminum nitride heater, which comprises a main oil tank and a stamping oil cylinder; the main oil tank is connected with a first main oil path, the first main oil path is connected with an upper cylinder total oil path and a lower cylinder oil path through a first two-position cartridge valve, the upper cylinder total oil path is connected with an inner cylinder oil path and the main oil tank through a second two-position cartridge valve, and an outer cylinder oil path is connected with the inner cylinder oil path through a cartridge valve; the first main oil path, a second main oil path and a third main oil path are connected with a pressure compensation main oil path; a first hydraulic control check valve is arranged on the inner cylinder oil path and the outer cylinder oil path, the first hydraulic control check valve is connected with a first pressure relief oil path connected with the second main oil path, and the inner cylinder oil path and the outer cylinder oil path are connected with a second pressure relief oil path between the first hydraulic control check valve and the stamping oil cylinder. The design of the inner cylinder and the outer cylinder can realize controllable pressure relief range of the stamping oil cylinder, the pressure relief oil path makes the stability of the pressurizing rate good, and the pressure fluctuation is small during the pressure relief process.

An integrated architecture system for dual-indirect heat pump thermal management in pure electric vehicles based on R290. Currently, most pure electric vehicles have low integration levels in their thermal management systems. Typically, the battery pack circuit and air conditioning circuit are connected in parallel through a heat exchanger, while the motor and electronic control cooling circuit is an independent circuit. This results in too many system components, occupying a large amount of engine compartment space, and lacking a standardized and precise processing structure. In this invention, one end of the radiator is connected to the second refrigeration device, and a first valve body is provided between the radiator and the second four-way valve. The other end of the radiator is a double-ended connection end, which is sequentially connected to one end of the second refrigeration device through the fourth inlet / outlet and the second inlet / outlet of the second four-way valve. A third valve body is provided between the double-ended connection end of the radiator and the second four-way valve. The other end of the second refrigeration device is connected to the first inlet / outlet of the second four-way valve. The double-ended connection end of the radiator is sequentially connected to the fourth inlet / outlet of the second four-way valve through a drive motor, an electronic control unit, and a second water pump.

The utility model belongs to the technical field of micro-channel reaction equipment, and particularly discloses a micro-channel reactor which comprises a cooling water pipe, a feeding pipe, a plurality of U-shaped pipes and a discharging pipe, the cooling water pipe is communicated with a plurality of water feeding pipes, each water feeding pipe is communicated with two water feeding branch pipes, the plurality of U-shaped pipes are sequentially communicated in an S shape, and the discharging pipe is communicated with the U-shaped pipes. Each water feeding branch pipe is communicated with the connecting position of the corresponding U-shaped pipe, each U-shaped pipe is composed of a jacketed pipe and an inner pipe, the jacketed pipes are connected to the inner pipes in a sleeved mode, the feeding pipe, the discharging pipe and the U-shaped pipes are all communicated with water return pipes, each water return pipe is provided with a water return thermometer and a water return valve, and the connecting position of each U-shaped pipe is provided with a water feeding thermometer. The micro-channel reactor can effectively improve the reaction uniformity, stabilize the pressure and improve the production safety, the design of the jacketed pipe can effectively reduce heat loss and maintain the heat balance of a reaction system, cooling water enters the multiple branch pipes synchronously, and the stability of the temperature and the pressure of the inner pipe can be maintained.

The utility model discloses a ventilation module of a tank container and the tank container, comprising a ventilation pipe connected to a ventilation port of the tank container; the ventilation head is arranged at one end, far away from the ventilation opening, of the ventilation pipe; the ventilation head is provided with a head pipe body connected with the ventilation pipe, a cover body covering the upper end of the head pipe body and a filter screen located in the head pipe body. The cover body is provided with an upwarp part located on the periphery, and a ventilation opening is formed between the upwarp part and the head pipe body. When the volume of an oil product in the tank box changes, air can enter and exit from the tank box through the vent pipe via the vent hole of the vent head, so that the balance of air pressure inside and outside the tank box is effectively maintained, and the problems of tank box deformation, difficult oil inlet or unsmooth oil outlet caused by abnormal air pressure are avoided; and safe and stable operation of the tank is ensured. The filter screen is arranged in the ventilation head, dust, impurities and other particles in air can be filtered out in the process that the air enters and exits the tank box, the particles are prevented from entering the tank box to pollute oil products, the quality of the oil products is guaranteed, and the impurities are prevented from damaging oiling equipment and oiled machinery.

This application provides a compressed air supply mechanism, belonging to the field of eddy current testing technology, which can improve the pressure stability of the supplied compressed air, as well as the stability and accuracy of eddy current test results, and improve testing efficiency. The compressed air supply mechanism includes a supply pipeline, a compressor, a series-connected air storage unit, a multi-stage gradient filtration unit, and a multi-stage drying unit. The series-connected air storage unit is used to store the compressed air supplied by the compressor, precipitate impurities in the compressed air, and stabilize the pressure of the compressed air. The multi-stage gradient filtration unit includes multiple filtration modules and is used to further remove impurities and moisture from the compressed air. The multi-stage drying unit includes multiple drying modules and is used to remove moisture from the compressed air. The filtration modules, drying modules, and series-connected air storage unit are arranged alternately to enhance the filtration effect. This application also provides an eddy current testing system.

This utility model discloses a hydraulic control system and an isothermal forging system, belonging to the field of isothermal forging technology. It includes an oil supply port, an oil return port, a first two-way cartridge directional valve, a first four-way directional valve, a high-pressure relief valve, a damper, a three-way cartridge pressure valve, and a low-pressure relief valve. The oil supply port is connected to the cylinder's plug cavity. The isothermal forging system includes an oil supply and return module, a cylinder with a replenishing oil circuit, and the aforementioned hydraulic control system. The oil supply end of the oil supply and return module is connected to the oil supply port of the hydraulic control system, and the oil return end of the oil supply and return module is connected to the oil return port of the hydraulic control system. The replenishing oil circuit is connected to the cylinder's plug cavity. By utilizing the combined use of the high-pressure relief valve and the damper, the opening and closing of the rapid oil release first two-way cartridge directional valve is controlled, effectively reducing pressure fluctuations during the transition from rapid to slow action at a relatively low cost.

The invention relates to a reinforcement learning variable load pressure control method and system based on enthalpy value calculation, computer equipment and a computer readable storage medium, and the method comprises the steps: continuously learning and optimizing a control strategy in the operation of a unit through employing the self-adaptive capability of reinforcement learning, introducing a neural network model, predicting the feature changes of a load and system pressure in advance, and improving the control precision. The problems of insufficient control precision and large pressure fluctuation caused by poor adaptability and lack of foresight of a traditional fixed model under the variable load working condition are solved, and real-time adaptation to influences of dynamic factors such as coal quality changes, starting and stopping disturbance, continuous variable load conditions and equipment aging is achieved; the technical effects of improving the response speed of the unit to the rapid variable load, reducing pressure fluctuation, reducing energy loss and equipment abrasion and improving the overall operation efficiency and reliability of the unit are achieved.

This utility model discloses an industrial steam conveying pipeline assembly with a diversion structure, relating to the field of steam conveying pipe technology. It includes a main steam conveying pipe and diversion pipes. A transition pipe is installed on the right side of the main steam conveying pipe, and a diversion connector is installed on the right side of the transition pipe. A first sealing ring is installed inside the diversion connector, and a second sealing ring is installed on the left end of each diversion pipe. A second fixing ring is installed on the outer left side of each diversion pipe, and a threaded rod is provided on the first fixing ring. A fixed base is provided below the main steam conveying pipe. This industrial steam conveying pipeline assembly with a diversion structure allows for quick disassembly of the diversion pipes without disassembling the entire pipeline system, shortening maintenance time. The snap-fit ​​structure between the annular groove and the first sealing ring ensures the sealing performance between the diversion pipes and the diversion connectors, while also facilitating separation. This solves the problem of difficulty in cleaning impurities from the inner wall of traditional welded or fixed pipelines.

This utility model discloses a biogas defoaming device, relating to the field of biogas treatment technology. It includes a defoaming tank, a balancing tank, and a water collection tank. A solid-liquid-gas separator is fixedly connected to the middle of the defoaming tank, and a spray pipe is located directly above the separator. An air inlet pipe and an air outlet pipe are connected to the top of the defoaming tank, with one end of the inlet pipe extending to the bottom of the tank. An overflow pipe is fixedly connected inside the balancing tank, which communicates with the bottom of the defoaming tank. The inlet of the water collection tank is connected to the overflow pipe, and the outlet of the water collection tank is connected to a liquid pump, the outlet of which is connected to the spray pipe. This biogas defoaming device can efficiently remove sludge particles and foam from biogas, reducing biogas pressure fluctuations.

This invention discloses a variable flow pulsating flow pressure balancing system, belonging to the field of gas flow technology. It includes a pressure-stabilized gas source, characterized by: a gas flow meter and a synchronization valve installed on a first gas flow pipe, a first pressure tap on the first gas flow pipe, and a second pressure tap on a second gas flow pipe. One end of the main pipeline is connected to the pressure-stabilized gas source, and the other end of the main pipeline is connected to the inlet of a variable flow pulsating flow pressure balancer. The outlet of the variable flow pulsating flow pressure balancer is connected to both the first and second pressure taps. A first pressure transmitter is installed on the first pressure tap, and a second pressure transmitter is installed on the second pressure tap. A throttling valve is installed on the second gas flow pipe, located at the second pressure tap. When used in variable flow or pulsating flow scenarios, this invention can effectively reduce pressure fluctuations, ensure that the gas flow state in the pipeline remains stable within a very short time, and improve measurement accuracy.

The invention discloses a multi-split air conditioning system which comprises an outdoor unit, an air conditioning unit and a control unit. The indoor units are connected to the outdoor units through refrigerant piping and are provided with indoor throttling elements in a matched mode; a control device for controlling the outdoor unit and the plurality of indoor units; in the heating process, the control device receives a shutdown or shutdown instruction, evacuation operation is executed, and refrigerants on the indoor unit side move towards the outdoor unit side; the control unit is configured to execute the following control so that the pressure of the air suction side and the pressure of the exhaust side of the compressor can reach a balanced state: when evacuation operation is executed, the indoor throttling element is controlled to be in a valve opening state, and the outdoor throttling element is controlled to be in a set opening degree; and after the evacuation operation is finished, the indoor throttling element is kept in a valve opening state, the outdoor throttling element is kept in a set opening degree, and then the outdoor throttling element is controlled to work in a valve closing state. The multi-split air conditioning system is ensured to stably operate in the shutdown or shutdown process, and noise is remarkably restrained.

The invention belongs to the technical field of heating devices, and particularly relates to an electric shock and incrustation prevention water heater which comprises a hot water storage tank, and a heating device is detachably arranged in the hot water storage tank; the heating device comprises a shell and a heating element located in the shell. The heating element and the interior of the shell form a sealed cavity, and the cavity is filled with insulating temperature conducting liquid; the storage bin is located on one side of the hot water storage tank; and the storage bin is communicated with the cavity through a connecting pipe. The shell is arranged in the hot water storage tank, the insulating temperature conduction liquid and the heating element are arranged in the shell, the heating element and water are isolated through the insulating temperature conduction liquid, the electrified heating element does not make contact with the water at all, and the water heater is divided into the two insulating isolation units including the electrified unit and the non-electrified unit. The electric leakage risk is thoroughly eliminated from the physical principle; and the insulating temperature-conducting liquid has the properties of insulation and heat conduction.

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 relates to the technical field of fiber processing, and discloses extrusion equipment for processing high-performance fiber products, which comprises a screw extruder, the screw extruder is provided with a feed port and a discharge port, a screw which is coaxially arranged in a centering manner and is driven by a motor is mounted in the screw extruder, and a spiral auger is mounted on the screw; the spiral auger comprises a feeding section close to the feeding port and a staggered-tooth shearing section close to the discharging port, the feeding section and the staggered-tooth shearing section are connected with each other, and the screw pitch of the feeding section is larger than that of the staggered-tooth shearing section. The screw pitch of the feeding section of the spiral auger is large, fiber materials can be rapidly conveyed, feeding smoothness is guaranteed, the screw pitch of the staggered tooth shearing section is small, and therefore melt pressure is balanced, pressure fluctuation is reduced, fiber melt extrusion is more stable, fibers are more evenly distributed in the melt, the mixing effect of the fibers is effectively improved, and the mixing efficiency of the fibers is improved. And the quality stability of the product is improved.

The utility model relates to the technical field of lithium battery production equipment, in particular to a pressure stabilizer for pneumatic conveying of lithium battery anode material powder, which comprises an air compressor, an air outlet pipe fixedly mounted at the air outlet end of the air compressor, and a filter cartridge fixedly mounted at the tail end of the air outlet pipe. A molecular sieve and a filter screen are sequentially arranged in the filter cylinder from bottom to top, a conical cylinder is fixedly installed at the bottom end of the filter cylinder, a top cover is fixedly installed at the top of the filter cylinder, an air inlet pipe is fixedly installed on a cylinder body at the top of the filter cylinder, an air storage tank is fixedly installed at the tail end of the air inlet pipe, and a conveying pipe is fixedly installed on a tank body at the bottom of the air storage tank. A buffer tank is fixedly mounted at the tail end of the conveying pipe, a first pressure stabilizing valve is fixedly mounted on the conveying pipe, an external pipe is fixedly mounted on the buffer tank, and a second pressure stabilizing valve is fixedly mounted on the external pipe. The lithium battery conveying device has the effects of stable-pressure conveying and air flow filtering treatment, and subsequent preparation of lithium batteries is facilitated.

The invention relates to the technical field of irrigation control, and discloses a flower collaborative irrigation control system and method based on edge computing, and the method comprises the steps: obtaining the parameters of each irrigation area; calculating a rhizosphere target water replenishing volume; constructing a water dropper pressure sensitive diagonal matrix; calculating an average transient voltage response matrix; calculating the radius of the transient volume cross gain spectrum; generating a target duty ratio; outputting an instruction duty ratio; and closing in a time-sharing manner according to the opening time of the valve corresponding to each irrigation area. The total execution duration and the target duty ratio are determined according to the actual water demand of the flower rhizosphere, the target duty ratio is corrected in combination with the pipe network coupling characteristic to obtain the instruction duty ratio, the instruction duty ratio is converted into the valve opening duration, and then the control mode of time-sharing closing according to the duration is adopted, so that the parameters of all links of irrigation control fit the water demand state of the flower rhizosphere; the influence of pipe network coupling on water dropper outflow is counteracted, so that the actual water supplementing amount of each irrigation area is matched with the water demand of the irrigation area.

The utility model relates to the field of shock absorbers, in particular to a long-service-life motorcycle shock absorber which has the advantages of being simple and reasonable in structure and accurate in damping adjustment and comprises an installation base, a hydraulic cylinder, a sealing cover, a piston rod, a piston, a first spring, a first supporting base, a second supporting base, an air bag assembly and a damping adjustment assembly. The mounting seat comprises a first mounting part, a second mounting part and a connecting part for connecting the first mounting part and the second mounting part, a first mounting groove is formed in the first mounting part, and a second mounting groove and a third mounting groove communicated with the second mounting groove are formed in the second mounting part; the included angle between the central axis of the second mounting groove and the central axis of the third mounting groove ranges from 160 degrees to 178 degrees, a first notch is formed in the position, located on the peripheral side of the second mounting groove, of the second mounting part, the central axis of the first mounting groove is parallel to the central axis of the second mounting groove, and the first mounting groove is located on the upper side of the second mounting groove.

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.

This utility model discloses a drive and feeding structure for use inside a spraying equipment, comprising: a drive system: a servo motor output end equipped with a pinion gear meshing with a planetary gear assembly; the planetary gear assembly includes two planetary gears mounted on a planetary carrier via pins, a gear ring meshing with the planetary gears, and a square keyway in the inner hole of the planetary carrier; a transmission system: one end of a transmission shaft is press-fitted to the keyway of the planetary carrier via a milled flat end, and the other end is equipped with a cam; a ball bearing is press-fitted onto the cam and mates with the inner hole of a connecting rod; the connecting rod has a ball-pin structure, and its U-shaped open end is connected to a plunger via a fixing pin and a retaining ring; and a pump system. This utility model adopts a planetary gear transmission structure combining a planetary carrier, double planetary gears, and an internal gear ring to achieve high torque output, smoother movement, and reduced pressure fluctuations.

This invention discloses a precise differential pressure control system and method for clean areas in pharmaceutical production workshops, including a supply fan, an exhaust fan, a return air volume detection device, an air volume control valve, a differential pressure gauge, a gas flow meter, an angle sensor, and a monitoring module. The monitoring module stores a preset pressure range and a preset adjustment time for each clean area. When the monitoring module detects that the actual pressure value of the clean area is outside the preset pressure range, it generates a corresponding control command based on the magnitude of the deviation and the preset adjustment time. The control module receives the control command and adjusts the speed of the exhaust fan and the opening of the air volume control valve accordingly. This invention achieves intelligent adjustment of clean room pressure by controlling the air volume of the clean room through the monitoring module. Furthermore, the monitoring module can intelligently adjust the speed of the exhaust fan according to the actual pressure, thereby achieving rapid adjustment of the negative pressure clean room pressure.

This utility model relates to the technical field of gas mixing equipment, and in particular to a gas mixing device with a buffer tank. By setting up a buffer device, the mixed gas is buffered, reducing pressure fluctuations during gas output and improving the mixing effect. Furthermore, by setting up a drain plug, condensate inside the machine is drained, further improving the mixing efficiency. The device includes a mixing unit; it also includes two drying units, a control unit, a buffer device, multiple drain plugs, and an explosion venting device. The two drying units, the control unit, and the buffer device are all installed on the mixing unit, and the multiple drain plugs and explosion venting device are all installed on the mixing unit and the buffer device. The mixing unit mixes the gas, the drying unit dries the gas, the control unit detects and controls the gas flow and pressure, the buffer device buffers the mixed gas, the drain plugs facilitate the drainage of condensate inside the machine, and the explosion venting device vents explosions.

The utility model provides a printing roller cooling device, which belongs to the field of printing and comprises a first electromagnetic valve, a cold water pipe, a first cooling pipeline, a first nozzle and a second cooling pipeline, the cold water pipe is provided with the first electromagnetic valve to realize interval spraying, and two ends of the first cooling pipeline are respectively connected with the cold water pipe and the second cooling pipeline. A first nozzle is arranged at the position, connected with the cold water pipe, of the first cooling pipeline to conduct pulse cooling, the second cooling pipeline is an axial straight-through flow channel, and cooling water in the second cooling pipeline can flow in an unpowered mode. By optimizing the design of a flow channel in the printing roller, higher heat exchange efficiency is achieved, and therefore the requirement for a cooling system is lowered.

This utility model relates to the field of enameled wire processing technology and discloses a paint supply device for enameled wire production, including a frame and a heating paint tank and a paint supply tank mounted on the frame. Both the walls of the heating paint tank and the paint supply tank are equipped with built-in constant-temperature heaters. A conveying pipe connects the heating paint tank and the paint supply tank. The first end of the conveying pipe is connected to the bottom of the heating paint tank, and a regulating valve is provided at the first end of the conveying pipe. The second end of the conveying pipe is connected to the top of the paint supply tank, and the bottom surface of the heating paint tank is higher than the top surface of the paint supply tank. Multiple paint drip nozzles are provided at the bottom of the paint supply tank. This utility model can ensure a constant temperature of the conveyed paint liquid, eliminates the need for a paint pump, controls the paint liquid supply under gravity, reduces paint liquid pressure fluctuations, and lowers equipment and operating costs.