173 results about "Liquid layer" patented technology

The robot simulation skin structure comprises a temperature control unit and an evaporation heat dissipation unit, the temperature control unit comprises a flexible base layer and a silver electrode layer, the silver electrode layer covers the flexible base layer, the flexible base layer is made of a flexible PTC material, the evaporation heat dissipation unit comprises a liquid storage layer and an opening and closing door, and the opening and closing door is made of a flexible PTC material. The opening and closing door covers the liquid storage layer, the opening and closing door is a shape memory alloy opening and closing door or a shape memory polymer opening and closing door, and heat dissipation liquid is arranged in the liquid storage layer. Therefore, according to the simulated skin structure, the temperature sensing function, the self-adaptive heating function and the evaporative heat dissipation function are integrated into a single flexible structure, the autonomous response of local heat management can be achieved without an external complex control system, and therefore an extra sensor, an extra controller and an extra complex circuit are omitted; independent work and quick response of each local area are realized, and the system structure is greatly simplified.

The invention relates to a hygienic product with a flow guide structure and production equipment and process thereof. The hygienic product comprises a bottom layer, an absorption layer and a surface layer, the absorbing layer is positioned between the bottom layer and the surface layer; the absorption layer comprises an absorption core body and a liquid permeable layer, the absorption core body is coated with the liquid permeable layer, the absorption core body is provided with a first liquid absorption area and a plurality of flow guide structures, and the flow guide structures are used for diffusing liquid absorbed by the absorption core body; the flow guide structure is integrally formed in the adsorption forming process of the absorption core body, the absorption core body comprises a second liquid absorption area, and the second liquid absorption area comprises the flow guide structure and the edge of the flow guide structure which extends outwards by 1 mm. The ratio of the fluff pulp density of the first liquid absorption area to the fluff pulp density of the second liquid absorption area ranges from 80% to 100%. The application has the effect of preventing the absorption core body from forming a high-density area.

The utility model relates to a valve sealing property testing arrangement, including detection case and support platform, its technical key point is: support platform is hollow round table and is equipped with with its intercommunication lower positioning ring on the upper surface, the lower surface of support platform is equipped with the extension pipe of inserting detection case bottom liquid layer, the outer circumferential surface of support platform is equipped with lower horizontal air inlet pipeline, the side of detection case is equipped with cantilever frame, and the longitudinal cylinder is fixed in cantilever frame top plate end, and the lower end of the cylinder rod of longitudinal cylinder is fixed with upper pressure seat, and upper pressure seat is hollow seat and is equipped with with its intercommunication upper positioning ring on the lower surface, and the center line of upper positioning ring and lower positioning ring coincides, and the outer circumferential surface of upper pressure seat is equipped with upper horizontal air inlet pipeline, and upper horizontal air inlet pipeline is equipped with the longitudinal air escape pipeline that end extends to the below of detection case bottom liquid layer. The device solves the problem that the accuracy of one-way detection needs to be improved, and the sealing property detection accuracy of valve body is significantly improved through bidirectional detection structure.

This invention relates to the field of nonwoven materials technology, and discloses a unidirectional liquid-guiding nonwoven fabric and its preparation apparatus. The unidirectional liquid-guiding nonwoven fabric comprises, from top to bottom, a liquid-guiding layer, a barrier layer, and a liquid-retaining layer that are stacked and connected together; both the liquid-guiding layer and the barrier layer are hydrophobic; the surface of the liquid-guiding layer has several raised areas and several non-raised areas; the liquid-retaining layer includes a hydrophilic fiber web; some of the hydrophilic fibers in the liquid-retaining layer pass through the barrier layer and are in contact with the lower surface of the liquid-guiding layer. The nonwoven fabric of this invention can achieve unidirectional liquid guidance, allowing liquid to quickly permeate from the surface of the liquid-guiding layer to the liquid-retaining layer, while effectively preventing liquid backflow in the liquid-retaining layer, thus helping to keep the surface of the liquid-guiding layer dry.

The utility model discloses a kind of rare earth polishing liquid extraction equipment, it is related to rare earth polishing liquid extraction technical field.The utility model includes jar body, extraction liquid automatic recovery component and fast mixing component, the left side of the jar body is connected with peep window, the bottom of the jar body is fixedly connected with support plate, the extraction liquid automatic recovery component includes control mechanism.The utility model passes through extraction liquid automatic recovery component, using servo motor drive screw rotation, makes it drive screw thread cover, movable frame and industrial camera accurate height adjustment, until industrial camera detects clear demarcation and automatically stops moving, in this process, movable frame drives adjusting rod and telescopic tube synchronous movement, so that collection cover is accurately located in extraction liquid layer, realize extraction liquid automatic recovery, effectively eliminate artificial visual misjudgment and operation lag problem, improve operation continuity and automation level, avoid different density liquid cross-contamination risk, improve extraction efficiency and product purity.

The application discloses a PETG chip depolymerization reaction device and belongs to the technical field of depolymerization reaction devices.The device comprises a conical cylindrical shell, a jacket is fixedly connected to the conical cylindrical shell, a discharge pipe is fixedly connected to the bottom of the conical cylindrical shell, a valve is arranged on the discharge pipe, a speed reducer is fixedly connected to the upper portion of the conical cylindrical shell, a lifting stirring assembly is arranged in the conical cylindrical shell, the output shaft of the speed reducer penetrates through the upper portion of the conical cylindrical shell and is fixedly connected to the upper end of the lifting stirring assembly, a group of limiters are fixedly connected to the inner wall of the upper portion of the conical cylindrical shell, and the limiters are arranged in cooperation with the lifting stirring assembly.The device can ensure the transverse and vertical stirring of the reaction liquid, accelerate the mixing of the liquid layer under the premise of rotating and lifting the lifting stirring assembly, can enhance the shear force of the liquid layer and liquid surface of the reaction liquid when the lifting stirring assembly is rapidly ejected and lifted, can enhance the destruction of the flow field of the reaction liquid flow layer, and can have a larger stirring range and a higher reaction liquid mixing reaction efficiency.

A method of operating a hydrostatically compensated compressed air energy storage system comprising to inhibit champagne effect conditions, can include charging the system; changing the system into a storage mode; and before a dissolved gas concentration in a layer of compensation liquid exceeds a champagne effect saturation threshold, operating the system in a dilution cycle mode that can include i) discharging at least a portion of the compressed air from the accumulator thereby drawing additional compensation liquid having a lower dissolved gas concentration than the liquid in the layer of compensation liquid into the accumulator, and ii) re-charging the system by conveying additional compressed air into the layer of compressed air in the accumulator thereby displacing a corresponding amount of compensation liquid from the layer of compensation liquid into a compensation liquid flow path and returning the system to the storage mode.

The invention relates to the field of diamond materials, in particular to a preparation method of a diamond material and a semiconductor device.The preparation method specifically comprises the steps that a polyion liquid layer containing nanometer nickel powder is formed on the surface of a diamond film; then carrying out pyrolysis at the temperature of 400 to 500 DEG C, and then growing graphene at the temperature of 800 to 1000 DEG C; according to the method, the dependence on expensive coating equipment is broken through, the preparation cost is greatly reduced while the performance of the diamond material is guaranteed, and more economical preparation options are provided for industrialization of field emission devices, thermal management devices and high-frequency electronic devices.

The application discloses an integrated double tray for a wet flue gas desulfurization absorption tower, and relates to the technical field of flue gas desulfurization; it comprises a tray body; a slurry pool, a desulfurization reaction zone, a flue gas demisting zone and a flue gas outlet are sequentially arranged in the absorption tower from bottom to top; the desulfurization reaction zone comprises a flue gas inlet and a spraying layer from bottom to top; the flue gas inlet is arranged on the side wall of the absorption tower; the tray body is located between the flue gas inlet and the spraying layer; the upper surface of the bottom of the first layer of tray is a first liquid accumulation layer, and the upper surface of the bottom of the second layer of tray is a second liquid accumulation layer. The upper surface of the top of the first layer of tray is tightly attached to the lower surface of the bottom of the second layer of tray, the two layers of trays are closely stacked, the secondary flow deviation of flue gas can be avoided, the rectification effect is continuously stable, the double-layer plate surface is stacked to form a continuous bubbling liquid layer, the gas-liquid contact time is prolonged, and the desulfurization reaction of high-sulfur flue gas is strengthened.

The invention provides a preparation system and a preparation method of a thin film, a perovskite solar cell and a laminated solar cell. The preparation system of the thin film comprises a liquid instillation device, a liquid absorption device and an annealing device. Wherein the liquid dripping device is used for dripping liquid containing solute and solvent on the surface of the substrate film layer to form a liquid film; the liquid instillation device comprises an instillation part, the instillation part is of a disc-shaped structure, and a plurality of instillation holes are formed in the disc-shaped structure in a penetrating mode. The liquid absorption device is used for absorbing and removing part of solute and part of solvent in the liquid film to obtain a base film layer paved with the liquid film after liquid absorption; a liquid absorption layer is arranged at the bottom of the liquid absorption device and comprises a liquid absorption material. The liquid absorption device further comprises a pressurizing part which is used for applying pressure to the liquid absorption layer so that the liquid absorption layer can make contact with the surface of the base film layer and reach a compressed state, and the pressurizing part is arranged above the liquid absorption layer. And the annealing device is used for performing annealing treatment on the base film layer paved with the liquid film after liquid absorption so as to obtain a thin film.

The embodiment of the present application belongs to the technical field of seawater desalination, and particularly relates to a seawater distillation module, a seawater distillation device, a seawater distillation system and a distillation method. The seawater distillation module comprises a material liquid layer, an air gap layer, a gas permeable layer and a condensation layer. The material liquid layer has an inlet liquid side for guiding seawater to enter and an outlet liquid side for guiding seawater to flow out. The air gap layer is arranged opposite to the material liquid layer. The gas permeable layer is arranged between the material liquid layer and the air gap layer, and is used for separating the material liquid layer and the air gap layer. The gas permeable layer is used for allowing the seawater in the material liquid layer to pass through after being heated, and enter the air gap layer. The condensation layer is used for condensing the water vapor entering the air gap layer, so as to produce fresh water. Compared with the prior art, the seawater distillation device can meet the production of fresh water in island reef areas.

A Device for applying a layer to a flat steel product includes a zinc alloy melt bath with an input side, an exit side, a stripping nozzle device which comprises at least one nozzle lip gap and which is arranged in the area of the exit side in such a way that the still liquid layer at the flat steel product is blowable off with gas which emerges through the nozzle lip gap. The device is configured to make at least one of increasing the bath temperature of the alloy melt bath if the current absolute local air humidity is reduced and vice versa, and / or reducing the thickness of the nozzle lip gap if the current absolute local air humidity is reduced and vice versa, and / or reducing the distance between the nozzle lip gap and the side of the flat steel product.

This utility model discloses a dual-sphere liquid measuring device, including an upper float, a lower float, a connector for connecting the upper and lower floats, a sensing mechanism, and a signal transmission module. The upper float floats on the surface of the upper liquid layer, while the lower float is suspended between the upper and lower liquid layers. The sensing mechanism, located on the connector, detects changes in the distance between the upper and lower floats. When the distance between the upper and lower floats exceeds a set distance, it transmits a detection signal to the signal transmission module. The signal transmission module then transmits the received detection signal to a controller, which performs further actions based on the connected alarm or indicator light. This utility model has a simple structure and is easy to install; it can be used simply by placing it in a container. When applied to oil-water separation containers, if the oil level exceeds a preset value, a warning will be issued to remind the user to remove the oil promptly.

An imaging well (100), comprising: an adhesive layer (110), and a liquid layer (120) covering the adhesive layer (110), the adhesive layer (110) and the liquid layer (120) forming a well body. The adhesive layer (110) is used for adhering a tissue specimen, the liquid layer (120) allows photons and liquids to pass through, and the well body accommodates an imaging liquid. The imaging well (100) allows specimen tissue to be adhered, and the operation process is simple and reduces tissue damage, thus significantly improving imaging stability and quality. In addition, the imaging well (100) can maintain the physiological state of tissues for a long time, and is suitable for long-time dynamic imaging research. Moreover, a stage comprising the imaging well (100), a two-photon microscope, and an imaging method are also provided.

The invention discloses a turbulent flow radiator and relates to the technical field of radiators. A turbulent flow blocking piece is arranged at a water inlet in one end of a cooling water channel, a blocking strip is arranged in the middle of the turbulent flow blocking piece, when liquid enters the cooling water channel, the laminar flow boundary is damaged through the blocking strip arranged in the middle of the turbulent flow blocking piece, and the turbulent flow effect is generated; the turbulent flow device is arranged on the upper wall of the pipe fitting in contact with the power device and is arranged in a triangular geometrical shape with continuous gradient, and when liquid passes through the turbulent flow device, the liquid continuously contacts with a heat conduction surface of the turbulent flow device to enhance the turbulent flow effect, so that the problem that the heat of the existing radiator can only be transferred to a liquid layer close to the pipe wall and is difficult to radiate is solved; the heat transfer efficiency is relatively low, so that the heat dissipation effect is reduced.

The utility model provides a water phase homogenizing tank for honey mustard sauce production, which relates to the technical field of water phase homogenizing tanks and comprises a tank body and a shaft rod, a hollow interlayer is arranged on the inner wall of the tank body, an electric heating device capable of heating the inside of the tank body is arranged in the hollow interlayer, an auxiliary device is arranged at the top end of the tank body, and the shaft rod is arranged on the shaft rod. The auxiliary device comprises a half gear and a horizontal gear, the horizontal gear is fixed at the top end of the tank body through a rotating shaft, the shaft rod can drive the pressure plate to move up and down in the tank body when rotating by means of meshing of the half gear and the horizontal gear, pressure is applied to the interior of the tank body through the pressure plate, and the pressure plate is driven to move up and down. According to the water-phase homogenizing tank, the flowing state of fluid in the tank body is changed, so that the relative movement between liquid layers is more violent, the turbulence degree is enhanced, the dissolving process is accelerated, layering of materials in the stirring process is avoided as much as possible, and the effect and efficiency of the water-phase homogenizing tank during material treatment are greatly improved.

The invention discloses a reconfigurable broadband circularly polarized metasurface antenna based on liquid, which is composed of three parts of structures including a top metal metasurface layer, a middle liquid layer and a bottom feed source antenna part. The top-layer metal metasurface comprises a dielectric plate F4B and a radiation metal sheet; the middle liquid layer is of a hollow structure in which liquid can be injected, and the structure consists of a medium PDMS (Polydimethylsiloxane); the bottom feed source antenna sequentially comprises a metal grounding plate, a dielectric plate F4B and a Wilkinson feed network from top to bottom. Signals are input to the Wilkinson power divider from the microstrip line connected with the 50-ohm microstrip line, and are transmitted to the middle liquid layer and the top metal metasurface through the four coupling gaps on the metal grounding plate, and switching of radiation and scattering modes by the antenna is realized by switching liquid injected into the liquid layer.

The utility model discloses a shutter cap hood tray, which belongs to the technical field of chemical engineering, and adopts the technical scheme that the shutter cap hood tray comprises a retention tray, a riser tube is fixedly connected to the inner side of the retention tray, a downcomer is fixedly connected to the bottom of the retention tray, and a shutter shunting mechanism is movably connected to the top of the retention tray. A flow adjusting mechanism is movably connected to the inner side of the downcomer, the gas-liquid interaction efficiency and the separation effect can be remarkably improved through a dynamic louver blade structure, the gas retention time is prolonged through a multi-stage retention space formed by a semispherical tower cover and a liquid layer, and bubbles fully react in the liquid layer; the louvre blades driven by the servo motor swing back and forth to refine an airflow path, increase the gas-liquid contact area and strengthen mass transfer; thirdly, dead angles, prone to scale deposition, of a static structure are eliminated through dynamic swing, and meanwhile impurity accumulation is restrained through shearing force generated by mechanical movement; finally, the maintenance cost is reduced while the separation efficiency is improved.

To efficiently permeate a cleaning liquid into ink fixed to a nozzle surface.SOLUTION: The washing liquid permeation device 40 includes an impregnated member 41 impregnated with the washing liquid F, and a holding member 44 which holds the impregnated member 41 in a plane shape by a plane 14F facing the nozzle surface 44P of the inkjet head 12 and brings the plane part of the impregnated member 41 into contact with the nozzle surface 14F, and the holding member 44 is more flexible than the nozzle surface 14F. The cleaning liquid permeation device 40 includes a liquid-impermeable layer (second layer 41B) between the impregnated member 41 and the holding member 44.SELECTED DRAWING: Figure 10

The invention relates to a high-power curved-surface antenna near-junction cooling device which comprises a high-power chip, a cover plate layer, a micro-channel layer, a transition layer and a liquid collection and separation layer from top to bottom, and the transition layer and the liquid collection and separation layer are communicated in a welding mode to form a full-parallel liquid collection and separation plate. The cover plate layer and the micro-channel layer are welded to form a locally-reinforced micro-channel slide glass, and then the locally-reinforced micro-channel slide glass is integrally arranged above the transition layer in an array form and is respectively connected with the liquid collecting and separating plate through welding; the high-power chips are arranged above the cover plate layer; the micro-channel layer comprises a liquid supply port, parallel micro-channels and a liquid return port; the transition layer is provided with array liquid supply ports and array liquid return ports which are in one-to-one correspondence with the micro-channel layers; the liquid collecting and separating layer is provided with a plurality of liquid supply static pressure cavities and liquid return static pressure cavities which are arranged in a staggered mode. The invention also provides a use method of the high-power curved antenna near-junction cooling device. A solution path is provided for heat dissipation of the high-power, high-integration and light-weight curved surface antenna, the design is reasonable, and the engineering realizability is high.

The utility model provides a circuit board structure with a multifunctional cover film, comprising a substrate layer, a conductive layer bonded and fixed on the upper surface of the substrate layer, and a functional cover film layer, the lower surface of the substrate layer is provided with a snakelike micro-channel network, the channel of the snakelike micro-channel network is filled with a perfluoropolyether cooling liquid layer, and the perfluoropolyether cooling liquid layer is filled with a perfluoropolyether cooling liquid layer. An opening of the snakelike micro-channel network is covered with a porous ceramic sealing layer; the functional covering film layer comprises an adhesion layer, a composite insulation layer, a gradient phase change heat conduction layer and a self-repairing protection layer, the adhesion layer is attached to the lower surface of the snakelike micro-channel network, and the composite insulation layer, the gradient phase change heat conduction layer and the self-repairing protection layer sequentially cover the upper surface of the conductive layer from bottom to top. On the basis that the integrated design of heat dissipation, water resistance, corrosion resistance and electromagnetic shielding functions of the circuit board is achieved, the overall thickness is reduced, and good bending resistance is achieved.

The application discloses a kind of equipment, method and nonvolatile storage medium for forming three-dimensional object.It relates to the field of 3D printing technology, the equipment includes: forming platform, three-dimensional object is formed on forming platform;Tray, forming platform and the forming surface between tray form for printing area;Optical module, for irradiating printing area;Controller, for controlling forming platform movement in printing process, so that forming platform and polymerizable liquid contact;Detection component, for obtaining liquid change state in the process that forming platform and polymerizable liquid contact;Controller is used to determine whether liquid layer thickness tends to be stable according to liquid change state, and controls optical module to irradiate printing area when liquid layer thickness tends to be stable.The application solves the technical problems that the pre-exposure waiting time applicability is poor and the hollow or printing layer thickness is not uniform in the related art based on the experience value to determine whether 3D printing ends exposure pre-waiting and enters exposure phase.

The utility model relates to the technical field of facial mask cloth, and discloses a cloud air cushion breathable superfine fiber facial mask cloth which comprises a facial mask cloth body, the facial mask cloth body comprises a first fiber layer, a second fiber layer is fixedly arranged at the rear end of the first fiber layer, an elastic layer is fixedly arranged at the rear end of the second fiber layer, and the elastic layer is arranged at the rear end of the first fiber layer. A breathable layer is fixedly arranged at the rear end of the elastic layer, a liquid storage layer is fixedly arranged at the rear end of the breathable layer, a skin-friendly layer is fixedly arranged at the rear end of the liquid storage layer, two eye exposure openings are formed in the outer surface of the mask cloth body in a penetrating mode, and a nose exposure opening is formed in the side, away from the eye exposure openings, of the outer surface of the mask cloth body in a penetrating mode; a mouth exposing opening is formed in the side, away from the nose exposing opening, of the outer surface of the mask cloth body in a penetrating mode, and two binding ropes are fixedly arranged at the rear end of the mask cloth body. According to the mask cloth, through combination of different materials, the mask cloth has multiple functions, and therefore the diversified requirements of consumers for mask products are met.

The utility model relates to the technical field of compressed air foam, and discloses a compressed air foam generating structure device which comprises a foam mixed liquid conveying pipe, a compressed air injection pipe, a mixing pipe and an arc plate I. A foam mixed liquid input port is formed in one end of the foam mixed liquid conveying pipe. According to the compressed air foam generating structure device, when compressed air is injected into the compressed air injection pipe, the injection pressure of the compressed air can be monitored through the pressure gauge, the injected compressed air is sprayed out from the diffusion holes, and the compressed air is diffused through the small holes, so that the contact area of the compressed air and foam mixed liquid is increased; the gas-liquid layering phenomenon caused by the fact that a large amount of foam mixed liquid gathers at the bottom of the foam mixed liquid conveying pipe due to the gravity effect is improved, and device vibration caused by a gas plug flow pattern generated by concentrated jetting of a large amount of gas is avoided. And the spoiler is matched with the mixing paddle, so that the effects of collision, fusion, crushing, coalescence and mixing of the compressed air and the foam mixed liquid are achieved.

The invention relates to a display device. The display device comprises a display panel and a heat dissipation layer, the heat dissipation layer is arranged on one side of the display panel, and the heat dissipation layer comprises a substrate, a driving electrode layer arranged on one side of the substrate and a cooling liquid layer arranged on the side, away from the substrate, of the driving electrode layer; wherein the cooling liquid layer is arranged between the display panel and the substrate, the cooling liquid layer is provided with two kinds of immiscible fluid, and the driving electrode layer is configured to drive the fluid to flow. According to the display device, the heat dissipation layer is arranged on one side of the display panel, the fluid and the driving electrode layer are arranged in the heat dissipation layer, and the driving electrode layer can drive the fluid to flow, so that heat is taken away, the temperatures of all the areas of the display panel are close, and display color cast caused by temperature difference is reduced.

The invention provides an electrochemical in-situ reaction device for time-resolved XAFS (X-ray fluorescence spectroscopy) testing, which relates to the field of spectral analysis testing and comprises a reaction tank body, a liquid layer thickness adjusting mechanism and a visualization mechanism, the end face sealing mechanism is arranged on the side, away from the first through hole, of the second through hole and is provided with a sample mounting position; an optical window hermetically extending into the reaction tank body is formed at one end of the visualization mechanism, and the liquid layer thickness adjusting mechanism adjusts the distance between the optical window and the second through hole; when the end face sealing mechanism is hermetically connected to the reaction tank body, the sample mounting position faces the interior of the tank body. According to the invention, the distance between the optical window and the second through hole is precisely adjusted through the liquid layer thickness adjusting mechanism to precisely adjust the thickness of the liquid layer, so that the application of the millisecond-level time-resolved XAFS technology in the electrochemical liquid phase reaction direction is realized, and a high-precision in-situ reaction device is provided.

The application discloses a low-temperature container heat insulation structure and a calculation method thereof. The low-temperature container heat insulation structure comprises a spherical outer container and an inner container. The outer container is sealedly arranged around the inner container. An insulation layer is arranged between the inner container and the outer container. The inner container comprises a gas-phase interlayer space at an upper portion and a liquid-phase interlayer space at a lower portion. The gas-phase interlayer space at the upper portion comprises a saturated vapor layer and a gas-liquid coexisting layer. The liquid-phase interlayer space at the lower portion comprises a first liquid layer, a second liquid layer and a third liquid layer. The outer container and the inner container are arranged eccentrically. The thickness of the inner container is not equal, and the distance from the gas-phase interlayer space at the upper portion to the liquid-phase interlayer space at the lower portion gradually increases. The application effectively reduces energy loss and reduces the use of raw materials.

The utility model relates to the technical field of aerosol atomization, and provides a liquid guide part, an atomization core assembly and an atomization device, which are used for solving the technical problem of poor liquid guide performance of the existing liquid guide part, the liquid guide part comprises at least two liquid guide layers, and the at least two liquid guide layers comprise an inner liquid guide layer and an outer liquid guide layer; the at least two liquid guide layers have an unfolded state and a curled state, the inner liquid guide layer is configured to be an inner liquid guide cylinder in the curled state, the outer liquid guide layer is configured to be an outer liquid guide cylinder wrapping the outer side of the inner liquid guide cylinder in the curled state, and the perimeter of the outer liquid guide cylinder is larger than that of the inner liquid guide cylinder; when the two ends of the at least two liquid guide layers are flush, in the unfolded state, a curled gap is formed between the inner liquid guide layer and the outer liquid guide layer, and in the curled state, the inner liquid guide cylinder and the outer liquid guide cylinder are attached to each other. The liquid guide piece has the curl gap in the unfolded state, and can be used for providing a deformation space when the inner liquid guide layer and the outer liquid guide layer curl, so that the problem of liquid leakage or unsmooth liquid guide of the liquid guide piece is not prone to occurring.