868results about How to "Use impact" patented technology

The invention provides an application program installation method, which is applied to an Android system platform and can comprise the following steps of: 202, acquiring an installation file of an application program; 204, analyzing a global configuration file from the installation file; 206, analyzing a permission in the global configuration file; 208, providing the permission for a user for selection; and 210, setting the permission which is selected by the user as the permission of the application program. The invention also provides a terminal. By the invention, the user can set the actual permission for the application program according to functions required by the user, so only the functions required by the user can be realized by the application program, and the other functions cannot be realized because the application program does not have the corresponding permission.

The invention provides an integrated pressure cooker facilitating lid opening. The integrated pressure cooker comprises a cooker body, a cooker lid and a fastening part, the fastening part comprises amovable clamping part arranged on the cooker lid and a fastening part body located on the cooker body, the cooker lid is fastened on the cooker body through the fastening part and further comprises openable clamping tongs, by opening and closing the cooker lid, the cooker body is unlocked and locked, the cooker lid is provided with an unlocking button, a first conveying mechanism is arranged between the unlocking button and the clamping tongs, the unlocking button drives the clamping tongs to be opened through the first conveying mechanism, when the unlocking button is triggered to move froman initial position to a first position, the clamping tongs are opened, and the unlocking button continues to be triggered to move to a second position, the movable clamping part is separated from thefastening part body. By operating the unlocking button, the clamping tongs are opened and separated from the fastening part, the pressure cooker is opened by one motion of operating the button, the problem in the prior art that the pressure cooker is complex in lid opening is solved, and a user conveniently uses the integrated pressure cooker.

The invention provides a terminal which comprises a statistical unit, an electric quantity acquisition unit and a processing unit. The statistical unit is used for making statistics on use habits of a user, and the use habits at least include electricity consumption and operating applications at each time interval of the terminal. The electric quantity acquisition unit is used for acquiring current remaining electric quantity, the processing unit is used for judging whether the remaining electric quantity is sufficient or not according to the use habits, and an electricity-saving mode is automatically opened or the user is prompted to open the electricity-saving mode if the remaining electric quantity is insufficient. The invention further provides a power management method of the terminal. By the aid of the terminal and the power management method of the terminal, different users can be effectively distinguished, and specific power management strategies for different users are adopted, so that user experience is improved.

A storage system is the basis for cloud computing; cloud computing lets a user store all data in an on-line remote data center and can have access to the data only by being connected to the data center via Internet when necessary, and can also compute by being connected to the data center via the Internet if the data needs to be computed. Cloud storage is a system which gathers a large amount of storage equipment with various types in a network through application software to work together and jointly provide data storage and business access functions externally through cluster application, a network technology or a distributed file system and other functions. The method adopts the equipment which is directly connected with a network medium to realize cloud storage. Internet Protocol (IP) addresses are distributed to the equipment, so that a client computer can save and have access to the equipment through a server which serves as a data gateway, and even can have direct access to the equipment without any intermediate medium under some circumstances.

The invention relates to a negative electrode material used for a lithium battery and a preparation method and application thereof, the negative electrode material includes a conductive substrate material layer and a silicon based thin film material layer, the silicon based thin film material layer contains one or more components selected from the group consisting of silicon element, SiOX and silicon alloy, wherein, 0 < X =< 2; in the silicon based thin film material layer, silicon accounts for 10-100% of the weight of the silicon based thin film material layer; the silicon based thin film material layer is a thin film formed by regular and / or irregular columnar and / or fibrous micro nano naps, wherein the micro nano naps are connected with each other by root parts, and the root parts of the micro nano naps are connected with the conductive substrate material layer; gaps are existed among the micro nano naps, and the porosity among the micro nano naps is 2%-98%; the diameter size of the micro nano naps is 1 nm to 10 mum, and the thickness of the silicon based thin film material layer is 50 nm-10 mum.

The invention provides a stamp managing machine, which is provided with a casing, wherein the interior of the casing is provided with a support assembly and a controller, the support assembly is provided with more than two stamp assemblies, the support assembly is provided with a rotary disc, a first driving assembly, a code disc and a photoelectric sensor, the first driving assembly is used for driving the rotary disc to rotate, the stamp assemblies are arranged on the rotary disc, the code disc is positioned above the rotary disc and is synchronously rotated with the rotary disc, the periphery of the code disc is provided with more than two notches, and the photoelectric sensor is positioned at the outer side of the periphery of the code disc and is used for detecting the notches. The stamp managing machine has the advantages that the stamps can be effectively managed, the efficient and accurate stamping operation is realized, and the working process of selecting the stamps and stamping is smooth.

The invention provides a hard rock road-header damping design method based on a multi-tuning mass damper. The hard rock road-header damping design method comprises the steps of establishing a hard rock road-header whole-machine rigid-flexible coupling multi-body dynamics model; 2, calculating hob dynamic rock breaking force and shield-surrounding rock mutual acting force and simulating hard rock road-header vibration exciting force; 3, analyzing and evaluating hard rock road-header driving performance and the whole-machine vibration level; 4, installing the multi-tuning mass damper on a hard rock road-header gearbox; 5, determining the quantity, distribution mode, mass, rigidity and damping of damper bodies in the multi-tuning mass damper by minimizing a minimal whole-machine vibration level index value or a maximal whole-machine vibration level index value of a minimal driving performance index. By arranging the multi-tuning mass damper on the hard rock driving gearbox and optimizing parameters of the multi-tuning mass damper, on the basis of improving or maintaining the hard rock road-header driving performance, the whole-machine vibration can be effectively lowered, and the damage to key parts caused by strong vibration can be avoided or lowered.

The invention discloses a data retransmission method, a data retransmission device, terminal equipment and a storage medium. The data retransmission method is applied to a receiving end, and comprisesthe steps of: receiving data packets transmitted by a transmitting end, wherein each data packet carries a serial number used for describing the uniqueness of the data packet, the serial numbers areconsecutive, and the receiving end and the transmitting end are based on an unreliable protocol; storing a missed serial number in a pre-retransmission cache region when detecting that the serial numbers of the acquired data packets are not consecutive, recording storage time of the missed serial number and calculating to-be-used time of the data packet corresponding to the missed serial number; and requesting for retransmission of the data packet of a target serial number to the transmission end or a third end storing the data packet corresponding to the missed serial number, wherein the target serial number comprises a serial number with the storage time reaching first preset time or the to-be-used time not longer than second preset time. The data retransmission method, the data retransmission device, the terminal equipment and the storage medium aim to solve the problem of data retransmission redundancy or influence on data usage in the existing data retransmission technology.

The invention discloses a low-power battery energy storage low-voltage instantaneous thermostatic water outlet electric water heater system comprising a mains power line, a charging adapter, a communication signal line, an adapter charging line, a charging and heating switching module control signal line, a charging and heating switching module, a battery pack charging and discharging line, a battery pack, an isolated low-voltage heating line and a thermostatic water outlet low-voltage electric heater. The adapter is utilized to be matched with battery charging and energy storage to avoid thefact that the use of the water heater is affected due to insufficient power supply from a local power grid, avoid the limitation on the electric power of the water heater and improve the applicable range. The low-voltage battery pack is used for charging and energy storage. The power supply current requirement of the power grid is low. The system is applicable to the power shortage area, can achieve long-time energy storage, reduces the energy loss and improves the energy use efficiency of the water heater. In general, low-power battery energy storage low-voltage instantaneous thermostatic water outlet electric water heater system has high safety factor, wide application range, energy saving and environmental protection functions and no emission.

The invention relates to a preparation method of porous perfluorinated sulfonic acid resin for catalysts, wherein the preparation method comprises that perfluoro(sulfonyl vinyl)ether and tetrafluoroethylene are polymerized under the condition of co-existence of a solvent, a pore-forming agent and an initiating agent to obtain the product, the perfluorinated sulfonic acid resin having low equivalent weight and low molecular weight is used as the pore-forming agent, the solvent is recycled by a way of adding deionized water and a dispersant and carrying out distillation, at the same time, the resin is molded, after further drying, a granular material is obtained, and moreover, a mixture of one or more of perfluorinated hydrocarbon / perfluorinated cyclic ether / chlorofluorocarbon are used as an extraction agent for extracting the pore-forming agent so as to form a porous structure. The method has simple operating conditions, has no need for high temperature and high pressure, and solves the problem in the prior art that effective catalytic component loss is difficult to overcome during a using process, and the service life of the catalyst is increased; and at the same time, due to the existence of the porous structure, the specific surface area is increased, and the active component utilization rate is improved.

The invention provides an Ethernet port test method and network devices, wherein the Ethernet port test method comprises the following steps: connecting each two Ethernet ports of the network devices through a network cable, and forming a network circuit; opening power supplies of the network devices, and enabling the network devices to conduct self transmitting and receiving package test in a full load mode and a circuit state; meanwhile, suspending the transmitting and receiving package of the network at regular intervals, examining operating state and statistical information of each Ethernet port, and storing the test result in a FLASH; after completing the transmitting and receiving package test, dismantling the network cable, and reading the test result stored in the FLASH by the network devices. With application of the Ethernet port test method and the network devices, test space can be saved, production test cost can be greatly reduced, and production quality can be controlled more effectively.

The invention discloses a sensor device, which comprises a mounting body, a light source and a sensor, wherein the mounting body comprises a light outlet hole and a light inlet hole, the light outlet hole is adjacent to the light inlet hole, the light source and the sensor are respectively arranged on the end in the light outlet hole and the end in the light inlet hole, the sensor device further comprises a lens, the lens is formed in the light outlet hole and is opposite to the light source, ray of the light source is diffused out of the light outlet hole after focused through the lens, the refracted ray enters the light inlet hole and is incident on the sensor, and a signal is transmitted after conversion through the sensor. The invention further relates to an electronic device provided with the sensor device.

The invention relates to a monitoring system, in particular to a Web server-based laboratory monitoring system, which comprises a laboratory monitoring node, a Web server, a GSM (Global System for Mobile communication) module, a database and a monitoring terminal, wherein the laboratory monitoring node is connected with the Web server through an RS485 serial port; the GSM module is connected with the Web server through an RS232 serial port; and the Web server is connected with the monitoring terminal through the Internet and a GSM network. The Web server-based laboratory monitoring system has the beneficial effects that the system can monitor temperature and humidity values in a laboratory, meanwhile can monitor on / off states of windows, fans and lamps in the laboratory, can monitor the laboratory in the Internet and GSM network modes, has a simple structure, is convenient to operate and has great promotion and application value.

The invention discloses a wet and dry dual use hand-held dust collector, comprising a handle component, a main body component, a dust cup component and a ground brush component, wherein the main bodycomponent comprises a main body bracket, a main body front cover, a main body rear cover and a motor component, a floater component is disposed in the dust cup component, a motor cavity is disposed onan upper segment of the main body bracket, a dust cup cavity is disposed on a middle segment of the main body bracket, a ground brush cavity is disposed on a lower segment of the main body bracket, the main body front cover is installed on the main body bracket and is located at the position of the motor cavity, the main body rear cover is installed on the main body bracket and covers the motor cavity, the dust cup cavity and the ground brush cavity, the motor component is disposed in the motor cavity of the main body bracket, the handle component is installed on the main body front cover, the dust cup component is installed in the dust cup cavity of the main body bracket, the floater component is installed in the dust cup component and corresponds to the motor component up and down, andthe ground brush component is connected with the ground brush cavity of the main body bracket. The wet and dry dual use hand-held dust collector disclosed by the invention has the advantageous effectsof convenient operation, good safety and reliability, long service life, high use efficiency and good sealing effect.

The invention relates to a multi-medium heat storage type warming water tank, which is a warming water tank for storing heat by using media such as electromagnetic oven heated water and the like, infusing hot water by using a manual or electric water feeding device and achieving heat storage and warming by using electricity, fuel combustion, hot water of a solar water heater and geothermal water. The warming water tank comprises a warming panel, a warming cavity, a plastic or metal plate, a cotton cloth layer and a water cavity, wherein the water cavity is provided with a water inlet pipe, a water outlet pipe, a stainless iron warming plate and a special bearing rack; a heat insulation layer and a plastic (or metal) protective shell are arranged outside the water cavity; the warming water tank for hands and feet of a single person is provided with a detachable heat insulation base; a water passage of the warming water tank for feet of multiple persons is provided with a three-way pipe and a heat resistant pipe connected with a water pipe of the water cavity; and the warming water tank mainly applied to warming of households and individuals and warming of feet of multiple persons also can supply hot water and shower, the heating transfusion device type warming water tank can be used for warming, and the manual or electric water feeding device is used for feeding water to the water tank. The warming water tank has the advantages of convenient operation, safety, environmental protection, energy conservation, sanitation, warming comfortableness, duration, high utilization of heat efficiency, wide available energy and durability.

The invention provides a preheating module and a gas-fired water heating equipment system with the same. The preheating module can be applied to gas-fired water heating equipment to preheat cold water in internal and external circulation pipelines before formal use of the gas-fired water heating equipment. The preheating module comprises a water inlet pipe section, a water return pipe section and a water pump, the water inlet pipe section can be connected with a water inlet pipe of the gas-fired water heating equipment, the water return pipe section is communicated with the water inlet pipe section, and the water pump is arranged on either the water inlet pipe section or the water return pipe section. Since the preheating module is used with the gas-fired water heating equipment, instant heating of domestic water can be realized, and accordingly user experience is improved. Furthermore, since the preheating module is independent from the gas-fired water heating equipment, both the gas-fired water heating equipment and the preheating module can be independently sold by a manufacturer, or the manufacturer can sell a system consisting of the gas-fired water heating equipment and the preheating module, and thus demands of different users can be met. In addition, when domestic hot water is required and the temperature of fed cold water is high, the preheating module is capable of increasing cold water flow rate by the aid of the water pump, and accordingly influences on utilization due to overhigh water outlet temperature of the gas-fired water heating equipment are avoided.

The invention discloses a hot spraying process of a metal ceramic coating on surface of a valve rod, and relates to the field of manufacture of a valve. The hot spraying process comprises the technical procedures of mechanical pre-processing, surface purifying, surface coarsening, pre-heating treatment, hot spraying, accurately grinding and polishing and the like; a vacuum electric furnace is adopted in the heat treatment; the valve rod is pre-heated to 80-150 DEG C; hypersonic flame hot-spraying is adopted; and a valve rod base body is cooled by a forcible air cooling device when being subjected to hot spraying, and a smooth and compact high-performance metal ceramic coating with wear resistance, corrosion resistance, high binding strength and low porosity is formed on the surface of the valve rod after being polished. The process is high in coating efficiency, free from pollution, high in binding strength of the coating and low in porosity; wear-resisting and corrosion-resisting performances and high-temperature and heat vibration resistance of the surface of the valve rod are greatly improved without changing the precision of the overall size of the valve rod; the usability of the valve rod is greatly improved; the service life of the valve rod can be improved by 2-5 times; and the hot spraying process can be applied to a steam valve of a steam turbine unit, a special valve for a power station and other valves.

The invention discloses a defrosting control method of a mobile air conditioner. The method includes: when the mobile air conditioner operates in a heating mode, acquiring the total operation time of the compressor of the mobile air conditioner; detecting the temperature of the evaporator of the mobile air conditioner, and detecting indoor temperature; if the total operation time of the compressor is larger than a first preset time and the difference of the temperature of the evaporator and indoor temperature satisfies a first preset condition or if the evaporator is in an overheat protecting state to allow the lower fan of the mobile air conditioner to be closed and the operation time of the compressor is larger than or equal to a second preset time, controlling the mobile air conditioner to enter a defrosting mode. By the method, the defrosted state of the condenser of the mobile air condition operated in the heating mode can be guaranteed, and heating effect is increased. The invention further disposed the mobile air conditioner.

The invention provides a Papanicolaou staining solution and a preparation method thereof, and belongs to the technical field of biology. The Papanicolaou staining solution comprises an improved hematoxylin staining solution, an EA50 staining solution and an orange G staining solution, wherein the improved hematoxylin staining solution comprises the following components: sodium iodate, hematoxylin, aluminum potassium sulfate, ethanol, glacial acetic acid and water; the EA50 staining solution comprises the following components: brilliant green, eosin, phosphotungstic acid, methanol, glacial acetic acid, ethanol and water; the orange G staining solution comprises the following components: orange G, phosphotungstic acid, ethanol and water. The Papanicolaou staining solution performs uniform staining, a cellular structure is clear after staining, cells are stained in bright colors, and observation and decision of clinical pathological sections are easy.

The invention discloses an energy-saving type flood early warning method and device for a garage. The early warning method includes the step of dormancy, wherein before the water level of the garage reaches a start water level, the early warning device is in a dormancy standby mode; the step of working, wherein when the water level of the garage reaches the start water level, a controller is activated, and the device goes into a working mode; the step of sampling, wherein after the device goes into the working mode, sampling is conducted through a water level sensor to obtain the height of the water level; the step of early warning, wherein when the value of the water level reaches a threshold value H0, a communication module is started to inform a car owner or related personnel; the step of stopping, wherein when stop conditions are met, early warning is stopped, and the device returns back to the dormancy mode. The early warning device mainly comprises a base, a digging rope, a travel switch, a floater, a digital processing chip, the communication module, a power supply for providing electric energy and the water level sensor. The dormancy mode is designed, so the device can automatically switch between the dormancy mode and the working mode; furthermore, an electronic switch can be arranged for starting and closing a related circuit module, and therefore energy consumption can be reduced to the greatest extent.

The invention discloses a transport box for intelligent security of Internet. The transport box comprises limiting clamping plates, a cover body, an inner box and an outer box; the inner box is arranged in the outer box, a cavity is formed between the outer box and the inner box, the limiting clamping plates are mounted at the two ends of the bottom in the inner box correspondingly, and one sidesof the limiting clamping plates are evenly connected with the inner side wall of the inner box through damping springs; a smoke sensor is mounted at the top end in the inner box, the output end of thesmoke sensor is electrically connected with the input end of a single chip microcomputer through a wire, and the output end of the single chip microcomputer is electrically connected with the input end of a buzzer alarm through a wire. According to the transport box, by mounting the damping springs, an electromagnetic sliding rail, a sliding block and the limiting clamping blocks, transported Internet intelligent security equipment is conveniently limited, fixed and clamped, and the situation that the equipment shakes in the transport box during transporting due to jolt, and consequently, collision is caused and the equipment is damaged is avoided.

The invention relates to a refrigeration utensil which comprises a heat-insulated storage chamber (2) and a cross beam (3) located at the front end of the storage chamber (2). The refrigeration utensil further comprises a storage container (4) which is located at the rear of the cross beam (3) and overlapped with at least parts of the cross beam (3) along the front and rear direction, the storage container (4) comprises a box (6) and a cover (7), the box (6) is provided with storage space (5) which is upwards opened, and the cover (7) is used for closing at least parts of the storage space (5).

The invention discloses a file transmission method, mobile equipment, a server and a file transmission system. The method comprises the steps of creating a unique identifier for each file needing to be transmitted in first mobile equipment; enabling the first mobile equipment to transmit the files needing to be transmitted and the identifiers thereof to the server through a network; after the first mobile equipment transmits the files needing to be transmitted and the identifiers thereof to the server, enabling the first mobile equipment to transmit the identifiers to second mobile equipment; enabling the second mobile equipment to receive the identifiers and to transmit the identifiers to the server; and enabling the server to conduct searching and matching according to the identifiers, position the files to be transmitted corresponding to the identifiers and transmit the files needing to be transmitted to the second mobile equipment. By adopting the method, the operation of file transmission can be completed efficiently, reliably and conveniently.

The invention belongs to the technical field of wireless charging components, in particular to a heat-dissipating magnetic conductive sheet for wireless charging. The heat-dissipating magnetic conductive sheet comprises a magnetic conductive substrate, an insulating heat conductive adhesive layer, a graphite layer and a copper foil. The magnetic conductive substrate is composed of a plurality of amorphous or nanocrystalline fragment units. A gap is formed between two adjacent amorphous or nanocrystalline fragment units. The insulating heat conductive adhesive layer is arranged in the gap and on the surface of the amorphous or nanocrystalline fragment units. The graphite layer is arranged between the insulating heat conductive adhesive layer and the copper foil. Compared with the sheets inthe prior art, the heat-dissipating magnetic conductive sheet has good shielding performance and heat dissipation performance. In addition, the invention also provides a preparation method of the heat-dissipating magnetic conductive sheet for wireless charging.

The invention discloses a novel folding wing. The novel folding wing is overall divided into an inner segment, a middle segment and an outer segment. Folding positions comprise a 90-degree position and a 180-degree position. A folding manner is simple, easy to implement and high in efficiency. A hinge four-rod mechanism is selected as a body of a driving mechanism, and meanwhile a hydraulic actuator cylinder is selected as a power source. On the aspect of materials, high-strength alloy hardened and tempered steel is selected as materials of shaft pins, and strength titanium alloy materials are selected as materials of connecting rod structures and lug sheets. Rotating and locking structures are arranged on upper flanges and lower flanges of an upper beam and a rear beam, and it is guaranteed that unlocking and locking are reliably achieved. In the design process of the novel folding wing, the size is determined by meeting certain strength requirements.

The invention discloses a dust-proof and heat-dissipating outdoor distribution box. It is fixedly connected with the bottom of the inner wall of the box, and the left side of the inner wall of the box is fixedly connected with the first partition board and the second partition board in turn from top to bottom, and the right side of the first partition board and the second partition board are connected with the The left side is fixedly connected, and the present invention relates to the field of electric power technology. The dust-proof and heat-dissipating outdoor distribution box achieves the purpose of dust-proof and heat-dissipating for the distribution box, and at the same time, achieves the purpose of cleaning the dust on the dust-proof cloth, ensures the cleanness of the air sucked in the wind bucket, and avoids The impact of dust on the function of the distribution box, while avoiding the fire safety hazards caused by the influence of dust, ensures the safety of the distribution box, reduces the maintenance cost of the distribution box, and prolongs the service life of the distribution box.

The invention discloses a pressure stabilizing type non-negative pressure water supply system which comprises a water inlet pipe, a water inlet pipe pressure stabilizing device, a water supply power combination device and a water supply pipe. The water inlet pipe pressure stabilizing device is integrally arranged on the water inlet pipe communicated with a municipal tap water pipe, and the water inlet pipe is supplied to all users after being treated and pressurized by the water supply power combination device; the water inlet pipe pressure stabilizing equipment comprises a high-level water tank, a hydraulic cylinder and a pressurizing barrel, the high-level water tank is communicated with the water inlet pipe through an L-shaped pipe, a water replenishing valve is arranged on the L-shapedpipe, the bottom of the high-level water tank is communicated with the pressurizing barrel through a folding pipe, a first electromagnetic control valve and a third check valve are arranged on the folding pipe, and a liquid level sensor is arranged in the high-level water tank; and an output shaft of the hydraulic cylinder is fixedly connected with a piston in the pressurizing barrel, the bottomend of the pressurizing barrel is communicated with the water inlet pipe through a pressurizing pipe, and a second electromagnetic control valve and a fourth check valve are arranged on the pressurizing pipe.

The invention relates to the technical field of new energy and discloses new energy power battery fixing device comprising a placement box. A sealing strip is arranged at the top of the placement box,a clamping device is arranged in the placement box, a cooling fan is fixedly installed on the surface of the placement box, a sealing device is arranged on the surface of the cooling fan, and a threading hole is formed in the surface of the placement box. According to the new energy power battery fixing device, the top of the fixing device is sealed through the sealing strip; dust of the coolingfan is filtered through the filter screen; when the cooling fan rotates, a cleaning brush is driven to rotate so as to clean dust on the surface of the filter screen; the fixing device is convenient to seal, dust on the surface of the filter screen is convenient to clean, the probability of blockage of the filter screen is reduced, accumulation of dust on the surface of the filter screen is reduced, the heat dissipation effect is improved, the sealing performance of the fixing device is improved, and the content of dust in the fixing device is reduced.

The invention discloses a control system and a control method for household appliances. The system comprises a mobile terminal and the household appliances, wherein the mobile terminal is used for acquiring a background noise value in the current environment and sending the background noise value to the household appliances; the household appliances are used for adjusting sound output values of sounding devices thereof based on the background noise value after the background noise value is received. The system can ensure that a user can hear sound made by the household appliances within the use scope of the household appliances and the use of the user cannot be affected by the too-loud fed-back volume, so that the user can obtain more comfortable experiences; in addition, a new function of controlling the household appliances remotely by the mobile terminal is added, so that the intelligence experience is improved.

The invention discloses an underground water stratified sampler which comprises a base, supporting legs are fixedly connected to the bottom of the base, a fixing plate is fixedly connected to the top of the base, and an electrical box is fixedly connected to the top of the fixing plate.When the underground water stratified sampler is used, the servo motor is started, so that the sampling box descends, and during the process, the push rod downwards pushes the positioning rod to rotate along the inner side wall of the supporting leg while downwards moving, and when the positioning rod reaches a specified position, the outer side wall of the gear cannot be meshed with the outer side wall of the push rod due to the arrangement of the buffer spring, so that the gear is prevented from being damaged when the sampling box descends;In the descending process of the sampling box, the outer side wall of the sampling box is cleaned through bristles, so that the cleanliness of the outer surface of the sampling box is guaranteed, the situation that dust adhered to the outer side wall of the sampling box pollutes underground water and affects use of personnel is prevented, the health and safety of the personnel are guaranteed, and the stability of the device during underground water sampling is improved.