79results about How to "Strong structural stability" patented technology

This utility model relates to the field of photovoltaic cleaning robot technology, and discloses a cleaning device for a photovoltaic cleaning robot, including a slide table with a slot. Two sliders are slidably connected to the inner side of the slot. Connecting plates are rotatably connected to the lower side of the two sliders respectively. A cleaning roller shell is rotatably connected to the end of the two connecting plates away from the slide table. A cleaning roller is rotatably connected between the two sides of the cleaning roller shell. A cleaning roller lifting mechanism is provided on one side of the slide table to raise or lower the cleaning roller shell. This utility model is started by a second servo motor, which drives the two sliders to move closer or further apart. Through the interaction of the two connecting plates and the cleaning roller shell, the cleaning roller is raised or lowered, thereby adjusting the distance between the cleaning roller and the photovoltaic panel cleaning surface. It has the advantage of strong structural stability.

This utility model discloses a projector mounting bracket, belonging to the field of projector installation technology. It includes a first mounting component comprising a rotating block and a side connecting column, the rotating block and the side connecting column being fixedly connected; a second mounting component, the second mounting component being mounted on the end of the side connecting column and rotating relative to the side connecting column; a third mounting component, the third mounting component being mounted on the end of the second mounting component and rotating relative to the second mounting component; and a fourth mounting component, the fourth mounting component being movably connected to the third mounting component, the fourth mounting component being an L-shaped mounting plate with several mounting holes for mounting a projector. This utility model achieves stable installation of the projector, allows for multi-dimensional orientation adjustment of the projector for convenient use, and features a simple structure and strong structural stability, which helps improve the installation stability of the projector.

The utility model relates to the technical field of coal mine filling mining, in particular to a fast and movable waste rock blocking wall for filling waste rock behind a support, and mainly solves the technical problems that an existing waste rock blocking wall is poor in structural stability, time-consuming and labor-consuming to build and poor in flexibility. The fast and movable type waste rock blocking wall comprises a bottom plate used for being attached to the ground of a roadway; the wall body assembly comprises a fixed wall body and spliced wall bodies, the bottom of the fixed wall body is hinged to the bottom plate, a hinged shaft is arranged in the width direction of the bottom plate, the number of the spliced wall bodies is at least one, the spliced wall bodies are detachably fixed to the upper portion of the fixed wall body, and the fixed wall body and all the spliced wall bodies form a complete wall body used for blocking waste rock; the supporting assembly comprises a telescopic rod and a locking piece, the telescopic rod is perpendicular to the width direction of the bottom plate, one end of the telescopic rod is hinged to the bottom plate, the other end of the telescopic rod is hinged to the fixed wall, and the locking piece is used for locking the length of the telescopic rod. The device is high in structural stability, easy and rapid to build and high in flexibility.

The utility model discloses an integrated fiber end beam splitter for multicore optical fiber, including the sheath and the inside bushing of its multicore optical fiber, and the multicore optical fiber includes a plurality of independent setting fiber cores, and the one end of each fiber core is induced modification and then etches and forms a microlens, and a plurality of microlenses form a microlens array, and each microlens is bonded with a grating of diffraction grating, and the diffraction grating is a two-dimensional plane film structure as a whole, covers the outside of microlens array, and the surface is etched with uniform and regular grating. The utility model discloses only through the end of the plurality of optical fibers is equipped with the microlens, and each microlens is bonded with a grating of diffraction grating, can make each fiber core light beam can enter corresponding microlens and complete collimation and diffract, and then bring the change of light beam phase and then split, and the application structure is simple, does not need additional coupling spare, and the splitting efficiency is high, and the stability is strong, effectively improves production efficiency, and reduces production cost.

The utility model discloses a liquid level visualization automatic induction soap dispenser which comprises a liquid soap bottle provided with an inner cavity and an intelligent pump head arranged on the liquid soap bottle. The liquid soap bottle comprises a bottom shell, a bottle body and a liquid level perspective ring connected between the bottom shell and the bottle body. A first limiting groove is annularly formed in an opening of the lower end of the bottle body, and a first limiting ring used for being embedded into the first limiting groove is annularly and upwards arranged at the top of the liquid level perspective ring in an extending mode. A second limiting groove is annularly formed in the top of the bottom shell, and a second limiting ring used for being embedded into the second limiting groove is annularly and downwards arranged at the bottom of the liquid level perspective ring in an extending mode. And the height of the liquid level perspective ring on the liquid soap bottle is less than or equal to 1 / 4 of the height of the liquid soap bottle. According to the liquid soap bottle, the liquid level perspective ring is arranged on the liquid soap bottle, and the height of the liquid level perspective ring on the liquid soap bottle is smaller than or equal to 1 / 4 of the height of the liquid soap bottle, so that a user can visually observe whether liquid soap needs to be supplemented or not without opening a bottle cap, the user can conveniently supplement the liquid soap in time, and normal use is prevented from being influenced by insufficient liquid soap.

The utility model discloses a novel backrest handle for protecting passengers, which belongs to the technical field of automobile seats and comprises a seat backrest, a handle, a handle blanking cap and a self-tapping screw. First holes are formed in two ends of the handle, a strip is arranged on the handle blanking cap, a second hole is formed in the end part of the strip, the handle is fixed on the seat backrest through a self-tapping screw, the self-tapping screw sequentially penetrates through the second hole and the first hole, and the handle blanking cap is in interference fit with the handle; the handle assembly is made of rubber materials, on the basis of meeting the requirements of Fanjin laws and regulations, the handle assembly is easy and convenient to install, soft and comfortable in material, good in manufacturability and capable of meeting the requirements of the GB 13057 standard and relieving injuries to the heads of passengers in the back row, the handle assembly is high in structural stability, the key size is easy to guarantee, and the handle assembly can be applied to follow-up platform type development of passenger car handle assemblies. The passenger car seat is suitable for passenger cars with passengers.

This invention relates to the field of heat insulation sheet technology and discloses a flame-retardant aerogel heat insulation sheet, comprising a heat insulation sheet body. The heat insulation sheet body has, from the outside to the inside along its thickness direction, a surface protective layer, a flame-retardant functional layer, an interface reinforcement layer, a core composite layer, and a bottom protective layer. Each layer is formed into an integrated structure through a gradient composite process. The core composite layer is made of aerogel powder and glass fiber composite. This flame-retardant aerogel heat insulation sheet, through the synergistic design of multiple physical layers, achieves deep composite of aerogel powder and glass fiber. Combined with a functional interface layer, a flame-retardant layer, and an installation adapter structure, it achieves comprehensive performance of "high heat insulation, strong flame retardancy, shatter resistance, and easy assembly," adapting to the heat insulation protection and insertion installation requirements of new energy lithium battery modules, effectively preventing the spread of thermal runaway and improving the safety of lithium battery use.

This invention belongs to the field of lithium metal battery technology, specifically relating to a fluorinated phase-separated polymer ion gel electrolyte, its preparation method and application, and lithium metal batteries. The fluorinated phase-separated polymer ion gel electrolyte provided by this invention comprises a solid phase and a liquid phase; the solid phase is a copolymer of a fluorinated acrylate monomer and a crosslinking agent containing carbon-carbon double bonds; the liquid phase comprises an ionic liquid and a lithium salt dissolved in the ionic liquid. Compared to liquid electrolytes and traditional SPEs, the fluorinated phase-separated polymer ion gel electrolyte provided by this invention has high ionic conductivity, mechanical strength, interfacial stability, and safety. It can effectively suppress the growth of lithium dendrites and adapt to large volume changes, avoiding short circuits and thermal runaway in lithium metal batteries under conditions of overcharging, over-discharging, or mechanical impact.

The utility model relates to a dual -purpose vehicle body structure and electric motor car, including non -cross type vehicle body and middle case, the non -cross type vehicle body includes the frame and with front pedal of detachable connection of frame, the middle case is used for with detachable connection of frame, the middle case sets up in the area of frame for accommodating the leg portion, forms cross type vehicle body, the middle case includes the box and the box cover, be equipped with the storage space in the box, the box cover is used for opening or closing the box, the utility model discloses the detachable connection of middle case realizes cross type and non -cross type vehicle body's flexible switching, can adapt to different riding scene and user preference.

The utility model relates to a communication structure of a low-voltage drawer cabinet, and belongs to the technical field of power distribution equipment. A communication structure of a low-voltage drawer cabinet comprises a drawer unit, a communication assembly is arranged on one side of the drawer unit, and the communication assembly is composed of a communication socket supporting piece fixed to a side plate, a communication socket fixed to the communication socket supporting piece and a communication plug connected with the communication socket. And the communication plug baffle plate is arranged at the periphery of the communication socket support piece. The utility model has the beneficial effects that the design is ingenious, the installation is convenient, the structural parts can be automatically processed, and the cost is reduced; the structure is stable and not easy to damage; a side outgoing line communication function is satisfied and an anti-misoperation function is possessed at the same time.

The invention provides an energy storage DC-DC control module structure device, and relates to the technical field of energy storage equipment, the energy storage DC-DC control module structure device comprises a module shell, the left side and the right side of the module shell are both provided with fixing supports, the left side of the module shell is provided with a first connector, the right side of the module shell is provided with a second connector, and the module shell is provided with a module upper cover. A sealing ring and a module PCBA are arranged in the module shell, the module shell is made of a high-strength alloy material, an installation groove matched with the installation of the module PCBA is formed in the module shell, a limiting structure is arranged on the wall of the groove, and the fixing support is assembled in the module shell. The space occupation and the carrying cost of the energy storage equipment are greatly reduced, the device is not only suitable for a fixed energy storage power station, but also can be flexibly applied to mobile energy storage scenes such as a portable energy storage power supply, a mobile charging station and a vehicle-mounted energy storage system, and the market application range of the product is effectively expanded.

The application discloses a kind of kitchen biogas liquid treatment devices, belong to sewage treatment technical field, it includes connecting plate, ring cylinder, fling filter mechanism, filter mechanism, protective cylinder, butt joint pipe, microwave heating pipe and storage tank, ring cylinder is located on connecting plate, fling filter mechanism rotates and is installed in ring cylinder, filter mechanism is inserted in fling filter mechanism and is communicated, protective cylinder is installed on ring cylinder, butt joint pipe is communicated protective cylinder and fling filter mechanism.The device is transported by centrifugal force generated by fling filter mechanism rotation, microwave heating pipe is heated to reduce viscosity and reduce colloid adsorption, filter mechanism retains impurities, and storage tank collects primary filtrate.The device solves the problem that existing device is easy to block, needs flocculating agent, and maintenance is difficult, realizes efficient filtration, convenient maintenance and low cost.

The utility model discloses an integrated 3D printing shoe which comprises a vamp structure and a sole structure which are integrally formed, the vamp structure is wrapped in the circumferential direction of the sole structure to form a shoe cavity, the vamp structure is arranged in a single-layer latticed mode, the vamp structure comprises a toe cap area, a shoe heel area and a welt area, and the toe cap area and the welt area are arranged in a staggered mode. The sizes of grid openings in the toe cap area and the heel area are gradually reduced from the sole structure end to the welt area end, the sole structure is arranged in a hollowed-out shape and comprises a first sole and a second sole, and a plurality of stacked hollowed-out layers are arranged between the first sole layer and the second sole layer. The shoe provided by the utility model can effectively avoid the problem of glue failure at the integration part of the shoe, and has the advantages of strong air permeability and high foot comfort.

The invention relates to the technical field of cable protection, in particular to a cable protection sleeve. The protective sleeve comprises an inner layer, a middle layer and an outer layer, the middle layer comprises a first layer and a second layer, the first layer is fixedly connected with the inner layer, and the second layer is fixedly connected with the outer layer; the first layer is made of a glass fiber reinforced composite material, the second layer is of a grid framework structure made of a shape memory alloy material, the grid framework structure is embedded in the first layer, and inner grid spaces of the grid framework structure are filled with magnetorheological elastomers; the inner layer is a waterproof insulating layer sprayed on the first layer; the outer layer is made of a modified polyurethane material and is of a corrugated structure; the cable protection sleeve is provided with an opening structure, sealing parts are arranged on the two sides of the opening structure, the sealing parts on the two sides can abut against each other in a matched mode so that the installation cavity channel of the inner layer can be sealed and isolated from the outside, and the sealing parts are made of rubber materials. A plurality of rubber supporting rings are arranged on the inner wall face of the inner layer and protrude out of the inner wall face of the inner layer, and heat conduction grooves are formed in the rubber supporting rings.

This invention provides a method for promoting the differentiation of induced pluripotent stem cells (iPSCs) into three germ layers and its application in differentiation potential detection, relating to the field of biotechnology. The method includes seeding iPSCs into a culture medium containing 5 μM~20 μM E-cadherin activator 1, shaking culture to form embryoids, adding differentiation medium for differentiation culture, obtaining embryoids with activated three germ layer differentiation potential; seeding the embryoids with activated three germ layer differentiation potential into a container coated with a cell adhesion matrix, adding differentiation medium for further differentiation culture, inducing differentiation into three germ layer cells. This invention solves the technical problems in existing technologies where induction of iPSC differentiation into three germ layers via the embryoid pathway results in poor embryoid formation, poor embryoid state, poor long-term maintenance, and poor adhesion after embryoid transfer, leading to poor endoderm differentiation and migration abilities.

The application relates to a method for rapidly preparing a porous Cu / Zn heterojunction electrocatalytic material and application. The method utilizes a dynamic hydrogen bubble template method to prepare the heterojunction electrocatalytic material, and the preparation is carried out under the condition of a higher cathode deposition current. The specific steps are as follows: firstly, copper sulfate, zinc sulfate and ammonium sulfate are dissolved in deionized water according to a certain ratio to serve as an electrodeposition solution. The electrodeposition is carried out at room temperature, the deposition condition is controlled by using a direct current power supply, a hydrophilic carbon paper is used as a substrate electrode, and the porous Cu / Zn heterojunction material is deposited for 30 seconds under the condition of a deposition current of-1.0 A. The preparation scheme can realize in-situ rapid preparation of the porous material, the loading is uniform and stable, the operation process of a relatively cumbersome hard template method is avoided, and the electrocatalytic carbon dioxide reduction preparation carbon monoxide performance is very high.

The utility model discloses a bridge construction protection device, including two groups of the load bearing seat of approaching bridge deck slab bridge side and a group of the load bearing plate of being able to move and insert between two groups of load bearing seat, the inside of two groups of load bearing seat has cavity respectively, a plurality of insert connection hole A is seted up on the load bearing plate, a plurality of insert connection hole B is seted up on the load bearing seat, and insert connection hole B with insert connection hole A position can be aligned, after the both ends of load bearing plate are movably placed in the cavity, through long foot bolt along insert connection hole B and insert into insert connection hole A, realize the fixation of load bearing plate in the cavity, the downside of load bearing seat is fixed with the curved support, and the upper portion and the middle portion position of curved support correspond respectively and install the up walking gyro wheel and the side walking gyro wheel. The present application can provide stable operation platform, support the flexible movement of the edge area and can cover two sides bridge deck slab construction demand simultaneously.

The utility model discloses a telescopic and adjustable insulating tubular bus assembly, which relates to the technical field of buses and comprises a plurality of groups of bus bodies and a supporting tube, supporting seats are fixedly mounted on the outer ring of the supporting tube and used for supporting the plurality of groups of bus bodies to be circumferentially and equidistantly arranged around the central axis of the supporting tube, and the supporting seats are fixedly mounted on the outer ring of the supporting tube. The two ends of the supporting pipe are connected with clamping assemblies for positioning the bus bodies one by one through telescopic pipe fittings, and the telescopic pipe fittings are provided with adjusting pieces for controlling the distance between the telescopic pipe fittings and the ends of the supporting pipe. According to the utility model, the problems that the existing cables are not easy to tidy during laying, a plurality of cables are often overlapped together, the appearance is not attractive, the laying process is extremely influenced, the cables are not easy to place separately subsequently, and badness is easily caused are solved, and the problems that the actual supporting length of the bus assembly is inconvenient to fix, and the service life of the bus assembly is prolonged are further solved. And flexible adjustment according to the actual assembly environment of the bus assembly and the like is not convenient to carry out.

The utility model relates to a hydraulic support technical field especially relates to a kind of manufacturing pieces for forming the manufacturing piece of hydraulic support push rod connecting seat, it includes: base, first support and second support;The first support and the second support are fixedly arranged on the upper surface of the base, and the first support and the second support form open slot between, and the open slot is used to connect the push rod of hydraulic support;The second support is equipped with boss towards the side wall of the open slot, the boss is used for drilling positioning, and the axis of the boss is coaxial with the connecting hole to be processed. By setting boss in open slot, it is convenient to assist drill bit positioning when drilling, eliminates the process of cutting reinforcement bar and root, can shorten the processing time of workpiece, blanking cutting is simpler, improve production efficiency. Since it is not necessary to additionally cut the pre-reserved reinforcement bar when drilling, reduce the cutting amount of drill bit when drilling, reduce the wear of equipment and tool.

This application discloses an LED display screen, relating to the field of LED display screen technology. The LED display screen includes a cabinet, LED display units, and an arc adjustment mechanism. The cabinet includes a first frame, a second frame, a first hinge structure, and a second hinge structure. The first hinge structure is rotatably connected between the first and second frames at their first ends, and the second hinge structure is rotatably connected between the second ends of the first and second frames. The LED display units are connected to the first and second hinge structures. The arc adjustment mechanism is located between the first and second frames and is used to adjust and fix the arc of the LED display units. This LED display screen solves the problem that current LED displays cannot achieve flexible angle adjustment while ensuring connection strength and angle consistency.

This utility model discloses a sensor mounting structure for a climbing scaffold control system, relating to the technical field of climbing scaffold control systems. By setting limit blocks, studs, and adjusting nuts at both ends of the pull-up steel cable, this utility model simplifies the structure for fixing the pull-up steel cable and allows it to be fixed through a stable mechanical structure. This prevents the pull-up steel cable from deforming due to clamping during fixing, extending its service life. Furthermore, after installation, the pull-up steel cable uses the counter-tension at both ends to fix and support the climbing scaffold sensor, allowing the pull-up steel cable to fully utilize its axial strength advantage. This not only increases the upper limit of the weight the pull-up steel cable can bear but also makes it less prone to bending deformation under load, extending its service life and reducing the maintenance frequency when using this sensor mounting structure for the climbing scaffold control system, resulting in better practical performance.

This application discloses a corner-claw photovoltaic glass and its right-angle glass claw, belonging to the technical field of vertical suspension installation of double-sided photovoltaic power generation glass, and is suitable for sway-resistant wind power generation systems. The corner-claw photovoltaic glass includes double-sided photovoltaic power generation glass, with right-angle glass claws attached to its corners. The right-angle glass claw is divided into a right-angle edge bonding area and a right-angle outer edge mounting area. The bonding area is adhered to the mutually perpendicular edge areas of the glass corner by an adhesive layer, and the mounting area is provided with mounting holes for connection to movable connectors. The right-angle glass claw is preferably tempered glass, which can form a U-shaped structure to achieve force distribution on both the front and back sides of the glass. This application replaces existing hanging clamps, solving the defects of existing solutions such as high cost, easy generation of hot spots, and poor stability. It has the advantages of low cost, no shading, strong wind resistance, convenient installation, and long service life, enabling low-cost, high-stability vertical suspension installation of double-sided photovoltaic power generation glass without elastic pads.

The application provides a telescopic solar wing lifting mechanism, which comprises a base and a telescopic mechanism; the base is fixed to a star body; the telescopic mechanism is arranged in opposite telescopic modes at two ends; the telescopic mechanism is arranged in at least three circumferential modes and is hinged to the base; the telescopic mechanism rotates along the hinge towards the side away from the star body; and the end of the telescopic mechanism away from the base is hinged to a solar wing module; the telescopic mechanism comprises at least a first working state and a second working state; in the first working state, the telescopic mechanism is contracted, and the connecting end of the telescopic mechanism and the solar wing module is close to the star body; in the second working state, the telescopic mechanism is elongated, and the connecting end of the telescopic mechanism and the solar wing module is away from the star body. The application has the effect that the solar wing maintains a certain distance from the star body after being unfolded, the increased solar wing does not block the antenna, and the transmission of signals is ensured.

The application discloses a single-crystal polarization-maintaining optical fiber based on intrinsic birefringence and a preparation method thereof, relates to the technical field of online car-hailing safety monitoring, and discloses the following technical scheme: the single-crystal fiber core of the optical fiber main body is integrally grown from a sapphire, lithium niobate and yttrium vanadate uniaxial crystal, the traditional stress-induced birefringence structure is abandoned, the intrinsic birefringence effect of the crystal is utilized to realize polarization maintenance, the optical fiber axial direction and the optical axis of the crystal form a non-zero included angle of 5°-90°, the fiber core is coated with a low-refractive-index cladding layer, and the optical fiber can be stably operated in an extreme high-temperature environment of 500 DEG C or above for a long time. The single-crystal polarization-maintaining optical fiber prepared by the application has the advantages of strong birefringence stability, excellent high-temperature resistance and high polarization maintenance precision, and is suitable for high-end scenes such as high-temperature sensing, optical transmission in extreme environments, and optoelectronic detection in aerospace.

The application relates to the technical field of bioengineering, and particularly discloses a recombinant human collagen XV and a preparation method and application thereof. The amino acid sequence of the recombinant human collagen XV is shown as SEQ ID NO. 1. The recombinant human collagen XV is derived from human collagen, and has no rejection and sensitization risks. Experiments show that the protein has good effects of promoting cell proliferation and promoting cell migration, and has good biocompatibility, and can be applied as a safe and effective biomedical material.

This invention belongs to the field of iodine adsorption material technology, and discloses a method for synthesizing and applying a highly efficient iodine adsorption material. The synthesis method includes: S1, adding an organic aldehyde ligand to a container, adding a solvent, and stirring to completely dissolve the aldehyde ligand; S2, slowly adding the above solution dropwise to an organic amine ligand solution to completely mix it with the amine ligand; S3, sealing the above mixed solution and stirring at room temperature until the color deepens; S4, after the reaction is complete, separating the reaction solution into small glass vials, tightening the caps, loosening them by half a turn, and placing them in a protective atmosphere; after several days of gas-liquid diffusion, visible crystals form at the bottom of the glass vials. The synthesized adsorption material has applications in volatile and radioactive iodine. The crystalline adsorption material synthesized by this invention has good stability, high adsorption efficiency for iodine, and a fast adsorption rate, and can be used for nuclear waste treatment and the capture of radioactive iodine.

The utility model discloses a beer barrel pressure difference balancing device which comprises a bottle cap, a gas cylinder, an activation assembly and a pressure relief switch arranged above the gas cylinder, a plurality of exhaust grooves are formed in the bottom of the bottle cap, the inner sides of the exhaust grooves are open, the activation assembly is located above the pressure relief switch, the activation assembly can trigger the pressure relief switch in an activated state, and the pressure relief switch is connected with the gas cylinder. Automatic pressure supplement is realized; through the cooperation of the activation assembly and the pressure relief switch, manual operation is not needed, convenience and rapidness are achieved, the use efficiency is improved, and the pressure can be automatically adjusted according to the change of the air pressure in the barrel.

The utility model relates to medical nursing equipment technical field, especially a medical bed leg part bed surface lifting structure. Including a push rod, a support sheet, in this structure, push rod sets up at the two sides of the thigh part bed surface place and is between the lug and drive motor, through the edge department waist type hole and lug articulates, through the edge department connecting hole and drive motor's output end connection, and the one side of support sheet and push rod pin joint, the other side and thigh part bed surface articulate, then the edge department waist type hole and middle part waist type hole between push rod, support sheet and thigh part bed surface between constitute a triangle structure, structure is more stable, leg part bearing is more excellent, can through drive motor push -and -pull push rod and adjust triangle size, to realize bed surface lifting. Install push rod and support sheet in the two sides of the thigh part bed surface place, and the space utilization is high, has reduced the space waste below the bed surface, has set up the bed surface more lowly while improved the security of medical bed.

The invention discloses a composite sensing electrode and a preparation method and application thereof. The electrode comprises a basic electrode, an Al / Co-MOFs / rGO layer and a bifunctional monomer molecularly imprinted polymer film, wherein the Al / Co-MOFs / rGO layer and the bifunctional monomer molecularly imprinted polymer film cover the surface of the basic electrode. The preparation method comprises the following steps: preparing an Al / Co-MOFs / rGO suspension liquid, dripping the suspension liquid on the surface of an electrode, drying the electrode, placing the electrode in a solution containing o-phenylenediamine, dopamine and template molecules, carrying out an electropolymerization reaction, and demolding to obtain the electrode. The composite sensing electrode provided by the invention has the advantages of multiple binding sites, uniform dispersion, good conductivity, good structural stability, strong specific recognition capability and the like, can realize rapid and accurate detection of perfluorinated and polyfluoroalkyl substances, can effectively reduce false positive records existing in the detection process, and can be widely applied to detection of perfluorinated and polyfluoroalkyl substances. The method has the advantages of short detection period, high detection sensitivity, high accuracy and the like, and is high in use value and good in application prospect in the fields of environment monitoring, food safety, water quality condition diagnosis and the like.

This utility model relates to the field of pallet technology, and in particular to a fireproof and flame-retardant pallet, comprising a base plate, three side plates on the upper side of the base plate, a support plate on the upper side of the side plates, a flame-retardant and fireproof component one on the upper side of the support plate, and a flame-retardant and fireproof component two on one side of the side plates. The outer sides of the base plate, side plates, and support plate are coated with a fire-retardant coating. This utility model has excellent fireproof and flame-retardant performance: by setting the flame-retardant and fireproof component one on the upper side of the support plate and the flame-retardant and fireproof component two on one side of the side plates, the double flame-retardant design effectively improves the fire resistance of the pallet. The flame-retardant component one and flame-retardant component two are respectively filled with flame-retardant element one and flame-retardant element two, which can effectively delay the spread of fire and reduce fire losses in the event of a fire.