75results about How to "Guaranteed circulating flow" patented technology

The invention discloses a circulation ink supply method and a circulation ink supply system, relating to the ink supply technique. The method and the system can ensure the printing quality, simultaneously, the system complexity can be reduced and the system cost is saved. The circulation ink supply system provided by the embodiment comprises an ink box, an ink inlet pool which is provided with an overflow beam, a discharging trough and an ink supply trough, and an ink inlet pump; the ink inlet end of the ink inlet pump is connected with the ink box; the ink outlet end of the ink inlet pump is connected with the inlet of the ink supply trough of the ink supply pool; the discharging trough outlet of the ink inlet pool is connected with the ink box, wherein, the ink supply trough outlet of the ink inlet pool is connected with the nozzle inlet which is arranged below the ink supply trough of the ink inlet pool; the nozzle inlet is connected with the ink inlet end of at least one nozzle; the ink outlet end of at least a nozzle is connected with the nozzle outlet; the nozzle outlet is connected with the ink inlet end of a returning ink pump; the ink outlet end of the returning ink pump is connected with the ink box.

The invention provides a compactly arranged small-sized reactor primary loop overall structure. The structure is suitable for a marine operation environment, and comprises a pressure container, double-layer sleeve structures, inner-pile components, a control rod driving mechanism, a main pump, a steam generator, a pressure stabilizer, a main equipment integral support, a suppression pool, a primary shielding structure and the like. The steam generator is connected with the pressure container through one double-layer sleeve structure; the main pump is connected with the pressure container through one double-layer sleeve structure; the pressure stabilizer is connected with an evaporator through a surge pipeline; and the pressure container, the steam generator, the main pump and the pressurestabilizer are installed in the suppression pool through the integrated integral support. According to the system provided by the invention, the circulation of a nuclear reaction coolant in a reactorcoolant system can be ensured, realization of compact arrangement of a nuclear steam supply system is facilitated, and the heat exchange efficiency is improved.

The invention provides an imitated natural habitat river type domesticating method for wild rhinogobio ventralis. The method comprises the steps of 1) building an imitated natural habitat river; 2) preparing for staged water quality control; 3) performing polyculture and matching for fishes; 4) feeding wild rhinogobio ventralis to be domesticated to an imitated river domesticating pool; 5) regulating and controlling the water quality in the early stage of domesticating; 6) feeding bait in the early stage of domesticating, namely, feeding living food to the imitated river domesticating pool at the early stage of domesticating of wild rhinogobio ventralis; 7) regulating and controlling the water quality in the middle and later stage of domesticating; 8) feeding bait in the middle and later stage of domesticating, so as to finish the domesticating of wild rhinogobio ventralis in the imitated natural habitat river. With the adoption of the imitated natural habitat river type domesticating method for wild rhinogobio ventralis and a cruise pool, the problem that the fishes like wild rhinogobio ventralis living in running water habitat are difficult to domesticate artificially can be effectively solved, a domesticating mode meeting the growth and development demand of wild rhinogobio ventralis is created, and the technological foundation is provided for artificial breeding of population.

The invention discloses a phase-change material energy-storage based cooling apparatus for a power battery. The cooling apparatus comprises a power battery, a cooling liquid circulation module and a refrigeration module, wherein the power battery is connected with the cooling liquid circulation module to form heat exchange circulation; heat exchange is carried out between the cooling liquid circulation module and the refrigeration module; the power batter is electrically connected with the cooling liquid circulation module and the refrigeration module separately; and according to the phase-change material energy-storage based cooling method for the power battery, the to-be-cooled power battery pack is cooled by the phase-change material energy-storage based cooling apparatus for the power battery. The cooling apparatus has the advantages of reasonable structure, high temperature control precision, high radiation capability, convenience in use, low power consumption and small size, and is more applicable to popularization and application in the temperature control of the power battery pack.

The invention provides a heating heat pump system used in an ultralow-temperature environment. The heating heat pump system comprises a main circulation loop which is composed of a first compressor (1), a first condenser (2), a vortex tube (4) and an evaporator (7), wherein the first condenser (2) is used for exchanging heat with a first water pipe (16) to make hot water or achieve heating, and a second condenser (5) is arranged on a pipeline between the first condenser (2) and the evaporator (7). The heating heat pump system further comprises an auxiliary circulation loop which is connected with the main circulation loop in an overlying mode through the second condenser (5), wherein the auxiliary circulation loop is used for exchanging heat with a second water pipe (17) to make hot water or achieve heating. By means of the heating heat pump system, heat of refrigerant in the main circulation loop can be further absorbed, intermediate-temperate water is made through the overlying circulation loop and is supplied together with high-temperature water made through the first condenser, the temperature range of made hot water is widened, intelligent regulation of the water temperature is achieved, and different demands of different users for hot water are met; energy at the hot end of the vortex tube is effectively utilized, and the COP of the system is improved.

The invention relates to a beehive capable of improving a bee environment in the technical field of bee raising. The beehive comprises a beehive body, a beehive bottom, a side cover, a beehive cover, a middle partition plate, a frame and a bee clapping plate; a support platform used for erecting the middle partition plate, the frame and the bee clapping plate is arranged at the upper end of the beehive body, the frame is composed of an upper beam, a lower beam and two lateral bars, the length of the two lateral bars of the beehive is not less than that of the lower beam, a removable bottom plate is arranged at the beehive bottom, after the bottom plate is removed, a bottom hole which is communicated with the interior of the beehive body is reserved in the beehive bottom, a bottom net matched with the bottom hole position is arranged on the top face of the beehive bottom, the bottom hole, the beehive body interior and an air hole are combined to form an air channel used for air circulation, air circulates along the bottom hole, the beehive body interior and the air hole, it is guaranteed that air inside the beehive body interior can perform circulation flow, the air convection effect is significant, the whole environment in the beehive can be improved, the environment inside the beehive can better adapt to biological characteristics of bees, and then health of the bees in the beehive is guaranteed.

The invention discloses an energy-saving and environment-friendly foot-bath barrel, which comprises a barrel body, wherein the barrel body comprises a control panel and a barrel cover; a duckbill spraying port and a massaging disc are arranged in the barrel body, and a water tank is movably arranged on the barrel body; a circulating water exchanging path is arranged on the lower bottom surface ofthe barrel body; the circulating water path comprises a PTC heating pipe, an electromagnetic valve and a five-way filter valve; the PTC heating pipe, the electromagnetic valve and the five-way filtervalve are coordinated with the circulating water path via pipelines, so that a water circulating system is defined; and the PTC heating pipe, the electromagnetic valve and the five-way filter valve communicate with the water tank via pipelines. The device (the foot-bath barrel) provided by the invention, through cooperation between the water tank and the water circulating system, can guarantee circulating of foot-bath water, and by arranging the five-way filter valve, the foot-bath water can be filtered when water circulating is guaranteed, so that the foot-bath water is kept clean; in addition, by arranging the PTC heating pipe, the foot-bath water can be heated in a circulating process of the foot-bath water, so that the foot-bath water can be prevented from getting cold; and by virtue of the massaging disc in cooperation of the duckbill spraying port, consumers' demands on foot bath can be satisfied.

The invention relates to a modularized semi-submersible type sea fish breeding platform. The platform comprises a main platform body structure, net wheels, nets, rotary mechanisms and driving mechanisms, the main platform body structure is internally provided with several parallel rotary mechanisms, and the rotary mechanisms comprise the driving mechanisms, the net wheels and rotary shafts; one net is fixed between every two net wheels, the nets are hung at the two side ends of the adjacent net wheels, and the net wheels of modularized rotary units are supported in the center of the main platform body structure through the rotary shafts; the net wheels are connected with the driving mechanisms to form the independent modularized rotary units, connecting pairs between the driving mechanismsand the net wheels adopt a gear-rack mode or an extruding friction mode, and the nets are driven by the net wheels to rotate. The platform has the advantages that net boxes and the nets automaticallyrotate for net drying to effectively avoid that attachments on the nets grow, and it is ensured that sea water inside and outside the net boxes normally flow circularly. The steps of net replacementand net cleaning can be omitted, and the workload and work intensity of fishermen can be effectively reduced.

The invention relates to incremental freeze concentration equipment with a double-sandwich structure. The incremental freeze concentration equipment comprises a crystallization and concentration unit,a cold carrier temperature control unit and a parameter control and automatic recording unit, wherein the crystallization and concentration unit comprises a crystallization and concentration tank, anouter sandwich temperature probe and multiple groups of temperature recording probes in the crystallization and concentration tank; the side wall of the crystallization and concentration tank is of the double-sandwich structure which comprises an inner sandwich layer in which a buffering heat carrier I is introduced and an outer sandwich layer in which a cold carrier II is introduced; the heat carrier I is a food-grade carrier having heat transfer and buffer characteristics; the cold carrier II is an anti-free cold carrier; the outer sandwich layer temperature probe is arranged in the outer sandwich layer; the multiple groups of temperature recording probes are arranged in the crystallization and concentration tank. The invention also relates to a freeze concentration method. The incremental freeze concentration equipment disclosed by the invention is capable of realizing stabilization and accurate control of temperature of feed liquid during a freeze concentration process, and has the advantages of having a good freeze concentration effect, strong universality to different feed liquid and high automation degree, being beneficial for optimizing technological conditions, and the like.

The invention discloses a constant-temperature express cabinet and a constant-temperature control method. According to the constant-temperature express cabinet, the temperature in the storage cabinetis detected by a temperature sensor. A refrigeration system, a heating device and a ventilation system are controlled to operate by an industrial personal computer according to the temperature, so that the constant-temperature environment of the express cabinet is guaranteed all the time. Therefore, by adopting the constant-temperature express cabinet and the constant-temperature control method, the abnormity of articles in the storage cabinet due to the ambient temperature can be effectively prevented, additionally, electronic components in the express cabinet are protected, the service lifeof the express cabinet is prolonged, the use reliability of the express cabinet is increased, and the late maintenance cost is reduced.

The invention provides a stirring type automatic cooling device. The stirring type automatic cooling device comprises a water tank, a circulating pump, a radiator, a heat exchange coil, an upper outerpipe, an upper inner pipe, a rotating outer pipe and a rotating inner pipe. The upper inner pipe is positioned in the upper outer pipe, the rotating outer pipe is positioned in a sleeve, the rotatinginner pipe is positioned in the rotating outer pipe, the lower end of the rotating outer pipe is in communication with a water inlet of the heat exchange coil, and the lower end of the rotating innerpipe is in communication with a backwater opening of the heat exchange coil. The upper end of the rotating inner pipe and the upper end of the rotating outer pipe are correspondingly inserted into the upper inner pipe and the upper outer pipe; and a rotating disk is fixed to the outer wall of the rotating outer pipe. According to the stirring type automatic cooling device, the rotating inner pipe, the rotating outer pipe and the heat exchange coil can be driven to rotate by a stirring motor, the rotating heat exchange coil is more beneficial to the full and efficient heat exchange between cooling water and materials in a container, the problems that low heat exchange efficiency and poor cooling effect of a previous fixed type heat exchange coil are solved, the beneficial effects are remarkable, and the application and popularization are suitable.

The invention relates to an air-lift circulating-water algae culture system which comprises a plurality of culture tanks. Each two adjacent culture tanks are in a group. The top of each culture tank is provided with a screw cover which is provided with a drain hole and an air inlet. One end of a drain pipe is inserted into the first culture tank, and the other end of the drain pipe is inserted into another culture tank. A first control valve is disposed at the bottom of each of two adjacent culture tanks and is connected with a tee to form a U-shaped pipe set through a pipeline. The pluralityof U-shaped pipe sets are connected to form the whole algae culture system through pipelines. The air-lift circulating-water algae culture system allows the upper layer of algae and the lower layer of algae to distribute evenly, and accordingly algae sedimentation and adherence to walls are prevented effectively and the algae are promoted to grow fast and healthily. During aeration, the system guarantees cyclic flowing of water. Aeration and flowing are integrated, so that power input is reduced. The air-lift circulating-water algae culture system is scientific, feasible and efficient.

The invention relates to a well wall mud cake scraping tool and method for an open hole well. According to the technical scheme, a rigid centralizer body short joint, a mud cake scraping steel wire short joint and a ball centralizer body short joint are of independent structures and can be freely combined and connected through screw threads; the inner drift diameter of the tool is consistent with the inner diameter of a well completion sleeve, and an upper connector and a lower connector are connected with the sleeve; the mud cake scraping steel wire short joint is in interference fit with a well hole, steel wires are linearly arranged, and circulating fluid can flow through channels between all the rows of the steel wires. The well wall mud cake scraping device and method have the advantages that the steel wires and the well hole are in interference fit, and a mud cake structure can be effectively damaged; a rigid centralizer and a ball centralizer on the upper portion and the lower portion of the tool cooperate, so that the centralizing degree of the sleeve of the tool is guaranteed; by means of the passageway structure of the tool, circulating flowing of the fluid is guaranteed. In a word, the tool can achieve effective removal of irregular well hole mud cakes and guarantee normal circulation of mud, flushing liquid, cement slurry and other well entering liquid, and therefore the mud cake flushing efficiency and the well cementation two-interface cementing strength are improved.

The invention discloses an electric cylinder with a circulation cooling channel, and belongs to the field of driving machines. The electric cylinder comprises a machine case, a motor, a lead screw, alead screw nut which are mounted in the machine case, and a front end cover and a rear end cover which are used for sealing the two ends of the machine case. The electric cylinder further comprises acooling mechanism, wherein the cooling mechanism is provided with a lubricating oil circulation channel; the lubricating oil circulation channel comprises a first oil storage area formed by the frontend cover and the gap between the machine case and the motor, a second oil storage area formed in the machine case, and a third oil storage area formed by the rear end cover and the gap between the machine case and the motor, wherein the first oil storage area is communicated with the second oil storage area, and the second oil storage area is communicated with the third oil storage area. The cooling mechanism is utilized to transfer the heat in the electric cylinder out of the machine case through circulation flowing in the lubricating oil circulation channel, the double effects of cooling and lubricating of the electric cylinder are achieved, thermal abrasion is reduced, the stability of the electric cylinder is improved, and the service life of the electric cylinder is prolonged.

An LED module employing vacuum phase change technology and applicable to LED lighting is mainly technically characterized in that a radiator is a bottom plate internally provided with a vacuum cavity filled with a cryogenic medium, the vacuum cavity is internally provided with a narrow-tube passage which is a hollow tube surrounding the vacuum cavity, and the peripheral wall of the vacuum cavity is provided with a micro-groove structure, namely corrugated grooves are connected into a groove-line structure. The LED module is in the overall vacuum sealed structure with the surrounding radiating fins, a principle of heat conduction of thermal tubes is generated, heat conduction and heat dissipation is more efficient than that of the thermal tubes, and heat conduction and heat dissipation are improved. The LED module with the special structure has the advantages that the cooling medium can quick gasify at low temperature to allow quick start of heat dissipation; the cooling medium is used with a new cooling medium, gasifying temperature is greatly lowered, heat dissipation speed is increased, and intermediate and marginal thermal gradient is decreased.

The invention relates to an air-lift circulating-water algae culture system which comprises a plurality of culture tanks. Each two adjacent culture tanks are in a group. The top of each culture tank is provided with a screw cover which is provided with a drain hole and an air inlet. One end of a drain pipe is inserted into the first culture tank, and the other end of the drain pipe is inserted into another culture tank. A first control valve is disposed at the bottom of each of two adjacent culture tanks and is connected with a tee to form a U-shaped pipe set through a pipeline. The plurality of U-shaped pipe sets are connected to form the whole algae culture system through pipelines. The air-lift circulating-water algae culture system allows the upper layer of algae and the lower layer of algae to distribute evenly, and accordingly algae sedimentation and adherence to walls are prevented effectively and the algae are promoted to grow fast and healthily. During aeration, the system guarantees cyclic flowing of water. Aeration and flowing are integrated, so that power input is reduced. The air-lift circulating-water algae culture system is scientific, feasible and efficient.

The invention belongs to the technical field of water treatment equipment, in particular to an adjustable reflux device suitable for sewage integrated wastewater treatment equipment. The device comprises a water pool body, partition plates are arranged in the water pool body, and the interior of the water pool body is divided into different functional areas by the partition plates. The device further comprises a flow adjusting mechanism which can adjust the flow and proportion of water entering the different functional areas. By adopting the reflux device, space can be saved, and the reflux quantity can be adjusted as required. When the water inlet amount of the integrated equipment is relatively low, circular flowing of water can be guaranteed, occupied space of original equipment is reduced, and the space of the equipment can be efficiently utilized. Flora in the adjustable reflux device can be in the optimal state, the adjustable reflux device can obtain a good ammonia nitrogen andCOD removal effect, the equipment can efficiently operate, and the equipment can be widely used in the field of environment-friendly equipment.

The invention relates to a ladle bottom structure capable of reducing continuous casting ladle cast residues. The ladle bottom structure is characterized in that a ladle bottom and ladle walls form a ladle inner cavity together; the ladle bottom structure comprises a first flat surface, a second flat surface and a transition curved surface; the first flat surface is internally provided with a ladle outlet; the second flat surface is internally provided with a vent brick; the second flat surface is higher than the first flat surface; the transition curved surface is connected with the first flat surface and the second flat surface. The ladle bottom structure has the following advantages: (1) ladle cast residues can be greatly reduced, and the cast residues can be reduced by above 70% on the premise of preventing ladle slagging; (2) the transition between the second flat surface and the first flat surface is smooth, so that circulation flow of molten steel in a low-lying area during an argon blowing process can be ensured; (3) the ladle bottom structure is relatively simple, less in construction difficulty and low in maintenance cost.

The invention discloses an observable wheat germinating device, and belongs to the technical field of wheat germinating equipment. The observable wheat germinating device comprises a box body and a box cover, wherein the lower end of the box body is provided with universal wheels capable of being braked, the upper end of the box body is provided with the box cover, the side face of the box cover is provided with a handle, the top face of the box cover is provided with breathable holes, the bottom face of the inner portion of the box body is provided with a groove, the groove is provided with awater absorption layer, the water absorption layer is provided with a separation layer, the four corners of the box body are provided with water injection ports respectively, the inner side wall of the lower portion of the box body is provided with a carbon dioxide detector, the inner side wall of the upper portion of the box body is provided with a temperature detector and lighting equipment, the inner wall of the upper portion of the box body is provided with an oxygen production outlet and a sprayer, the outer wall of the box body is provided with a control panel, the lower portion of thebox body is provided with an exhaust port, and the bottom face of the box body is provided with a driving power supply and an oxygenator. The observable wheat germinating device has the advantages that the use is simple and convenient, the practicability is high, the seed deviation is effectively prevented, and the uniform distribution of seeds is ensured, thereby ensuring the high survival rate of wheat seedlings.

The invention discloses a damage-free waste drilling fluid processing process, which comprises the following steps of: firstly drilling a wellhead by a drilling machine, and injecting wellhead slurry; passing a mixture of waste drilling fluid and the wellhead slurry through a vibration sieve to be filtered for obtaining rock debris, and meanwhile, feeding filter liquid into a desander; putting the obtained rock debris into a cleaner a, performing cleaning through externally injected clean water to obtain clean rock debris and medium-coarse sand, and meanwhile, merging the clean water a into circulation water; passing the filter liquid through the desander to obtain medium-fine sand; putting the obtained medium-fine sand into a cleaner b; using introduced clean water for cleaning to obtain clean sand; merging cleaning water b into the circulation water; and meanwhile, feeding the filter liquid obtained after passing through the desander into a desilter. The damage-free waste drilling fluid processing process has the advantages that through the principle, on the premise of not easily causing rock framework collapse due to clay mineral swelling and transportation, various different solid-phase particles in the waste drilling fluid can be processed; the circulation flowing use of the waste drilling fluid is ensured; and the condition that the fluid cannot reach a borehole from a flow storage layer is avoided.

The invention relates to a petroleum screening device. The petroleum screening device comprises a circular-tube-shaped screening device body, wherein a screening hole channel is formed in the screening device body; a feeding pipe and a discharging pipe, which are communicated with the screening hole channel, are arranged at two transverse ends of the screening device body; the middle part of the screening device body is rotatably connected with a rotary shaft; a plurality of filtering impellers are arranged through the rotary shaft in an annular array; in a filtering impeller array, the diameter of the filtering impeller close to one side of the feeding pipe is relatively small and the diameter of the filtering impeller close to one side of the discharging pipe is relatively great; each filtering impeller comprises a rotary table which is fixedly connected with the rotary shaft; filtering blades are arranged on the rotary tables in the annular array; each filtering blade comprises a sector-shaped outer frame and each outer frame is internally provided with a capturing net; a certain included angle is formed between the plane on which each outer frame is located and the plane on which the corresponding rotary table is located.

The invention discloses a filling device special for an injectable suspension. The filling device comprises a dosing device, a dosing control valve and a filling head. The dosing device comprises a piston booster device and a dosing cavity. A dosing cavity inlet and a dosing cavity outlet are formed in the lower part of the dosing cavity. The dosing cavity is connected with the filling head. The dosing control valve is a three-way valve and comprises two inlets and a liquid outlet. One of the inlets is connected with the filling head. The other inlet is connected with the dosing cavity outlet.The filling head is internally provided with a control valve set. A liquid inlet, a dosing cavity connecting opening, a dosing control valve connecting opening, a filling opening and a liquid discharging opening are formed in the filling head. The dosing cavity connecting opening in the filling head is connected with the dosing cavity inlet. The dosing control valve connecting opening is connected with one inlet of the dosing control valve. The liquid discharging opening is controlled to communicate with the filling opening through a piston. A filling container is arranged at the lower part of the filling opening. Liquid can be made to be always at a circulation state in the filling process, the consistency of concentration of the injectable suspension is ensured, the filling quality is ensured, and a non-mixed suspension liquid can be filled.

The invention provides an adjustable 3D printing nozzle. The adjustable 3D printing nozzle comprises a nozzle assembly, wherein he nozzle assembly comprises a first nozzle body (1), a second nozzle body (2), a third nozzle body (3), a driven gear (4), a blocking piece (5), a spring (6), a fixing piece (7), a feeding piece (8) and a driving assembly (9); the blocking piece (5) is an integrally-formed piece and comprises a blocking piece body (51), a stop block channel (52), a blocking plate (53) and a first fastening thread (54); and the feeding piece (8) comprises a feeding piece body (81), afeeding through hole (82) and an installation face (83). According to the adjustable 3D printing nozzle, the spraying area of the whole nozzle can be adjusted according to needs by adjusting the number of channels for materials to be input into the nozzle and the area of each channel, and therefore different requirements for the material extrusion rate during printing of different structures can be met, the same printing nozzle can be suitable for printing of different structures and transverse streets, the application range is wide, and the printing efficiency is high.

The invention discloses an efficient landscape water body circular flowing apparatus. The efficient landscape water body circular flowing apparatus comprises a base and an apparatus body arranged on the base, wherein the base is provided with a rubber pad, the apparatus body comprises a power supply mechanism and a work mechanism connected to the front end of the power supply mechanism, the work mechanism comprises a rotation shaft and a water inlet pipe opening arranged at the front end of the rotation shaft, a water outlet hole is arranged above the rotation shaft, a solar panel is arranged above the power supply mechanism, a charging electric wire is arranged on the back side of the solar panel, a storage battery is arranged in the power supply mechanism, the solar panel and the charging electric wire are connected with the storage battery, and the storage battery is connected with the rotation shaft. Compared with the existing technical scheme, the efficient landscape water body circular flowing apparatus has the advantages that the structure is simple, the applicability is strong, the water circulation efficiency is high, and the economic cost is low.

The invention discloses a silent type cooling fan motor structure capable of preventing lubricating oil from leaking. The silent type cooling fan motor structure capable of preventing lubricating oilfrom leaking comprises an oil-containing bearing, an outer frame and a rotating shaft, wherein the rotating shaft is arranged inside the outer frame, the rotating shaft is arranged at the position, close to the middle, of the outer frame, the oil-containing bearing is arranged on the outer side of the rotating shaft, a middle pipe is arranged on the outer side of the oil-containing bearing, a buckle ring is arranged at the bottom of the oil-containing bearing, and an oil storage space is formed in the part, at the bottom of the buckle ring, of the middle pipe. According to the silent type cooling fan motor structure and the oil-containing bearing, the lubricating oil in a filling bearing system can be enabled to circulate inside the bearing system, and lubricating oil does not leak from the bearing system; the sufficient lubricating oil exists between the inner wall of a bearing inner hole and the shaft center in the operation process of a cooling fan rotor to form an oil film, the pressure of the oil film is sufficient to achieve the effect that the rotor is not inclined when the rotor operates, and the shaft center is not in contact with the inner wall of the bearing hole; and the cooling fan rotor is overturned in the operation process, so that friction abnormal noise caused by the contact between the shaft center and the bearing does not occur at any angle, and the servicelife of a cooling fan is longer.

The secondary ink box comprises an ink box body, a rear end cover and a front end cover, the rear end cover and the front end cover are sealed and covered with the ink box body, an ink supply cavity and a backflow ink cavity which are located on the left side and the right side of the ink box body respectively are formed in the ink box body, and a plurality of ink through holes are formed in the bottom of the ink supply cavity and the bottom of the backflow ink cavity respectively. The ink supply cavity and the backflow ink cavity are each internally provided with a liquid level sensor used for detecting the amount of ink in the ink cavity, a negative pressure cavity I communicated with the ink supply cavity is formed above the ink supply cavity, and a negative pressure cavity II communicated with the backflow ink cavity is formed above the backflow ink cavity. The secondary ink box for the ink-jet printer is ingenious in design and has the beneficial effects that ink precipitation is prevented, bubbles are effectively removed, the printing stability is high, the constant-temperature effect is good, and the reliability is high.

The invention discloses a multifunctional aquaculture pond, which comprises a body and a cyclone barrel arranged on one side of the body, wherein the side wall of the cyclone barrel is provided with awater outlet, the top of the body is provided with a water inlet, an seedling escaping recovery device is arranged in the cyclone barrel in a sleeve mode, the body is internally provided with a seedling anti-escaping device which can be respectively communicated with the cyclone barrel and the seedling escaping recovery device; the upper part in the body is also provided with a surface water collecting device communicated with the cyclone barrel; and the bottom of the body is provided with a central anti-escaping device communicated with the seedling escaping recovery device. The pond has theadvantages that the pond is suitable for culturing various aquatic products in different growth periods, particularly for culturing fishes and shrimps, the number of fish and shrimp fries escaping from the pond can be greatly reduced, the culture cost is reduced, the circulating flow of water the in the pond can be ensured, and dirt can be collected and removed in real time.

The invention discloses an unmanned underwater vehicle dynamic performance overland test system and a test method thereof and belongs to the field of unmanned underwater vehicles. The test system structurally comprises an organic working medium evaporator, a preheater, a self-contained pressure regulator, a gas flotation turbine expansion generator, a simulated sea water condensing module and a working medium pump. A PLC controller can control a working medium pump driver according to detected data of an evaporator outlet pressure sensor and an evaporator outlet temperature sensor. The systemperforms overland simulation on the unmanned underwater vehicle working environment, accordingly, overland simulation operation on an unmanned underwater vehicle is achieved, the test flexibility anddynamic performance test efficiency of the system are improved, and the test cost is lowered. Meanwhile, the PLC controller judges whether the superheat degree at an inlet of the expansion generator is qualified or not according to the detected data of the evaporator outlet pressure sensor and the evaporator outlet temperature sensor, the system is regulated through the working medium pump driver,automatic control is achieved, and the working test stability is guaranteed.

The invention provides chemical engineering sampling equipment for solid-liquid synchronous sampling. The chemical engineering sampling equipment comprises an inner pipe, a spiral pipe arranged on the periphery of the inner pipe in a sleeving manner, and at least two groups of sliding sleeve pieces arranged in the spiral pipe. The sliding sleeve pieces are driven by water flow to slide along the interior of the spiral pipe, a sliding plug is always parallel to the cross section of the spiral pipe, and the sliding sleeve pieces are connected through a second connecting part; a plurality of containing cavities are formed in the bottom of the inner pipe, the containing cavities and the spiral pipe are arranged in a staggered mode, each containing cavity is provided with a contraction-shaped notch, the containing cavities are communicated with the bottom of the inner pipe through the notches, and the containing cavities are detachably connected with the inner pipe; and the inner pipe is further provided with a circulating pump, so that the sample in the inner pipe circularly flows. According to the sampling device for simultaneously sampling the solid and the liquid of chemical raw materials, disclosed by the invention, synchronous sampling of the powdery solid and the liquid can be realized, the sampling steps are simplified, the working hours are shortened, and meanwhile, the accurate control on the solid-liquid ratio can be realized.

The invention discloses a high-pressure water cooling resistor which structurally comprises a first pipeline, a box body, a wiring electrode plate, a water cooling resistor, a second pipeline, a radiator, an inlet / outlet and a processing device. When the high-pressure water cooling resistor is used, after water flow enters a threaded pipe, a spiral water path is formed in the threaded pipe due to inertia, and the speed of the water flow is increased; cooling liquid can quickly flow into the water cooling resistor through the threaded pipe to circularly flow, hot air on the threaded pipe is blocked through the heat insulation layer, and the threaded pipe is sealed by matching a rubber cushion and a spiral tightening strip with a conduction port, so that the rubber cushion and the spiral tightening strip are in a closed state, and the cooling liquid in the threaded pipe is prevented from flowing and permeating into the resistor; and the water cooling resistor is protected, so that the water cooling resistor can operate stably.