37results about How to "Meet different functional needs" patented technology

The invention discloses an antibacterial composite fiber membrane for removing haze particles and formaldehyde and a preparation method of the antibacterial composite fiber membrane. The membrane is composed of a polymer nanometer fiber layer and a polymer-metal oxide composite superfine fiber layer. The membrane has multiple and efficient air purification functions, and can be persistently antibacterial and remove harmful substances in air, such as haze particles and formaldehyde. The soaping degree is high, the membrane is reusable, and the service life of the membrane is prolonged. After a protective fiber layer or other fiber layers are added to the outer surface of the composite fiber membrane, the composite fiber membrane can be used for masks, air purifiers, clean room air filtration systems, air conditioners and the like. Moreover, the spinning components, the ratio and the number of fiber layers can be adjusted at will so as to meet different functions and demands. The composite fiber membrane has the advantages of low cost, simple preparation process, energy conservation, low consumption and no secondary pollution.

The invention relates to a reconstruction method of a satellite-borne control computer. The reconstruction method includes the steps of 1, subjecting a FPGA (field programmable gate array) of each computer unit to system partitioning; 2, allowing a surface control center to generate FPGA configuration files of the computer units; 3, allowing the surface control center to transmit the FPGA configuration files to a data management subsystem; 4, allowing the data management subsystem to transmit the FPGA configuration files to a satellite bus; 5, allowing the computer units to perform reconstruction in the on-duty state. The reconstruction method has the advantages that the original central processing unit of the satellite-borne computer is replaced by the SRAM (static random access memory) type FPGAs, a reconstruction control circuit and a reconstruction configuration data storage designed on the original satellite-borne computer are connected to a configuration interface of the SRAM type FPGA, each SRAM type FPGA includes a constructible area and a fixed area, reconstruction of the satellite-borne control computer can be achieved on orbit, the satellite-borne control computer is under control of the surface during an on-orbit phase, and functions are changed in real time through the configuration files injected from uplink.

The invention relates to the field of film or sheet products produced by plastic or plastic state substance, in particular to a five-layer co-extruded fiber felt reinforced plastic composite board. The five-layer co-extruded fiber felt reinforced plastic composite board is composed of plastic layers and fiber felts and is characterized in that there are three plastic layers and two fiber felts, the three plastic layers are respectively arranged in parallel, the three plastic layers are respectively a top layer, an intermediate layer and a bottom layer, a layer of fiber felts is respectively lined between the top plastic layer and the intermediate plastic layer and between the intermediate plastic layer and the bottom plastic layer, and the plastic layer is prepared from any one of polypropylene, polyethylene and rigid polyvinyl chloride. The five-layer co-extruded fiber felt reinforced plastic composite board provided by the invention is high in strength, low in density, good in weather resistance and wide in range of application.

The invention provides a terrain-adaptive transformable mobile robot, which comprises a balance mechanism, two rocker arm mechanisms, steering mechanisms and rotor mechanisms, wherein the two rocker arm mechanisms are fixedly installed on two sides of the balance mechanism; two ends of each rocker arm mechanism are respectively provided with one steering mechanism; the lower end of each steering mechanism is provided with one rotor mechanism. According to the terrain-adaptive transformable mobile robot disclosed by the invention, differential motion is realized by the differential gear set of the balance mechanism so as to adapt to the variation of rugged terrain; different configurations are obtained by the variation of the rocker tilt angles of the rocker arm mechanisms and the L-shaped rod corners of the steering mechanisms. The terrain-adaptive transformable mobile robot disclosed by the invention is a transformable wheel-type mobile robot which has the advantages of multi degrees of freedom, changeable construction, strong terrain adaption capability and stable and reliable structure.

The invention relates to an electric power communication network system centralized topology generation and display method, and belongs to the technical field of data exchange networks. An electric power communication network is composed of a plurality of heterogeneous networks, each heterogeneous network comprises one or more sub-networks, each sub-network comprises one or more network management parts, each network management part comprises one or more network element sets, each network element is composed of one or more devices, and each device comprises a virtual machine and a physical machine. The method includes the following steps that a repeated connection relation is screened out and deleted by traversing the electric power communication network; a topological graph is generated; the repeated connection relation is added to the generated topological graph, and the whole network topology display of the electric power communication network is completed. With the method, the whole topological graph can be generated, and different map scales are adopted so that the whole topological graph can be in specific scaling; all the function devices are displayed on one graph, and therefore the topological graph can also perform real-time feedback tracking on management and programming service of the electric power communication network.

The invention discloses an intelligent platform type electric / thermal integrated small household appliance system used in a kitchen. The system is characterized by comprising an intelligent electric / thermal integrated base and a kitchen household appliance group, wherein the base mainly comprises an entity / intelligent control module and a main working module, which are combined to form a base entity that can be made from various materials; the kitchen household appliance group comprises a plurality of electric products and electric / thermal kitchen household appliance products; the entity / intelligent control module has the function of identifying the technical characteristics of various kitchen household appliance products and accurately switching to the operation interface to execute corresponding working modes and complete instructions, and the process can be controlled through an entity and / or remotely controlled by APP software on a smart phone, a PAD, a laptop and a desktop computer; the main working module provides kinetic energy and thermal energy for the kitchen household appliance products. The intelligent platform type electric / thermal integrated small household appliance system used in the kitchen, disclosed by the invention, creates a novel application value, namely a plurality of tailless kitchen household appliance products can be used on the intelligent electric / thermal integrated base connected using only one power line, so that the trouble of plugging and unplugging the household appliances can be avoided, the system is flexible in intelligent control, high in performance cost ratio of use, and good in energy consumption utilization rate.

The invention discloses a suspended wheel type mobile platform capable of crossing an obstacle. The suspended wheel type mobile platform capable of crossing the obstacle comprises a laser radar and anindustrial personal computer, wherein the laser radar is mounted on the upper end surface of a vehicle body main body and used for monitoring and sensing the surrounding environment; the industrial personal computer is mounted in the vehicle body main body and used for controlling a whole vehicle; the suspended wheel type mobile platform capable of crossing the obstacle further comprises wheels mounted at the bottom of the vehicle body main body; the wheels are connected to wheel carriers; and the wheel carriers are connected with short supporting rods through shock absorbing devices. According to the suspended wheel type mobile platform capable of crossing the obstacle, the ground clearance and the inclination angle of the vehicle body can be actively adjusted, the passing ability of a narrow space and an inclined road surface is improved, and different functional demands are satisfied.

The invention relates to a method and a system for dynamically adjusting a sensor data acquisition algorithm. Based on data and a plan of a related sensor acquisition device, dynamic adjustment for acquisition modes or identification algorithms of the sensor acquisition device is achieved, real-time matching for external environment conditions with the sensor acquisition device is achieved, and effects of keeping precise data are achieved. According to the invention, mode identification is performed on an acquisition mode or an identification algorithm through a local end of a sensor acquisition device, optimized operation with quite high load is performed on a remote end, and on-line update of the acquisition mode or the identification algorithm is performed remotely, so update efficiency is increased. Only identification results are sent to the remote end, so huge construction cost and difficulty in large-scale deployment of sensor acquisition devices are reduced. According to the embodiment of the invention, acquisition modes or identification algorithms of the sensor acquisition devices can be changed in batch as required, thereby meeting different function requirements of arranged sensor acquisition devices, and being suitable for working conditions with different requirements.

The invention belongs to the technical field of obstacle detection, and particularly relates to a smart obstacle detection vehicle based on modular control. The vehicle comprises a vehicle body; the bottom of the vehicle body is provided with track wheels through which the vehicle body can move along a track; the track wheels are electrically connected with a drive motor, and the drive motor drives the track wheels to move; and a driving position for a user to ride is arranged inside the vehicle body. The vehicle is characterized by further comprising a control module, an image recognition module, an obstacle detection and determination module, a speed detection module, a power control module and a data storage module; and the control module is in signal connection with the image recognition module, the obstacle detection and determination module, the speed detection module, the power control module and the data storage module. The vehicle has the advantages of high degree of intelligence, high applicability, accurate obstacle detection and high safety.

The invention discloses a folding electric scooter. The scooter comprises a folding handle, a stem, a front frame, a rear frame, a power wheel, a driven wheel, a pedal, a telescopic seat post, a cushion and a battery box. The folding handle is installed at the upper end of the stem. The cushion is installed at the upper end of the telescopic seat post. The bottom of the cushion is provided with a shock absorption spring. The telescopic seat post can be installed on the rear frame in retractable mode. The battery box is connected electrically with the power wheel. The power wheel is installed on the front frame. The driven wheel is installed on the rear frame. The battery box is installed detachably on the stem. The stem and the pedal are both installed on the front frame in a folding mode. The power wheel is connected with the front frame through a first folding mechanism in folding mode. The rear frame is connected and arranged detachably at the rear end of the front frame. The folding electric scooter uses modular design and a simple structure, and possesses a multi-folding function. After multiple times of folding, and after the cushion is lowered by adjusting the telescopic seat post, the space occupied by the integral electric scooter can be greatly reduced to make the folding electric scooter more convenient to carry and store.

The invention provides an aluminum alloy double-layer CRH (China rail highspeed) train body structure which comprises floors, edge beams, side walls, end walls and a train roof, the floors comprise a lower floor and a middle floor, and the lower floor comprises end floors at the two ends, end sealing structures and a middle floor; the two sides of the middle floor are fixedly connected with the side walls to divide the space in the train body into an upper passenger room and a lower passenger room; the side walls, the edge beams and the floor structures are matched with one another, a plurality of windows are formed in the middle of each side wall and located in the upper passenger room and the lower passenger room respectively, and pedaling doors and equipment mounting doors are arranged at the two ends of each side wall. The upper passenger room containing space and the lower-layer passenger room containing space of the train can be provided, and the passenger room containing space is almost doubled.

The invention discloses a remote control high-pressure cleaning machine. The remote control high-pressure cleaning machine comprises a water gun and a complete machine, and further comprises a transmission module used for establishing communication connection between the water gun and the complete machine, and the water gun is provided with a controllable display screen. The wireless communicationconnection between the water gun and the complete machine is established through the transmission module, remote real-time control over the complete machine is realized by using the controllable display screen on the water gun, the water pressure and water quantity output by the complete machine are controlled and adjusted mainly controlling the motor rotating speed or motor input currents of thecomplete machine or controlling output of currents and voltage for a direct current battery pack, a user can conveniently select different levels or modes for cleaning under different use conditions,and use is facilitated. The remote control high-pressure cleaning machine facilitates remote real-time control of the user for the pressure and flow of the water gun, can display output parameter information of the complete machine in real time and facilitates selection of the user for different use working conditions. The remote control high-pressure cleaning machine is rich in function and convenient to use and control and has broad market prospects.

The invention discloses ultra-high performance concrete based on a composite cementing material system. The ultra-high performance concrete is prepared from a composite cementing material, quartz sand, Guami stone, steel fiber, a water reducing agent and water, the composite cementing material is prepared by compounding cement, fly ash beads, silica fume and mineral powder, and the molar ratio of chemical components in the composite cementing material comprises that the ratio of SiO2 to Al2O3 is 6.4-8.3; the ratio of SiO2 to Na2O is 121.4 to 203.8; the ratio of SiO2 to CaO is 0.9 to 1.1; and the ratio of SiO2 to SO3 is 82.2 to 281.7. The composite cementing material system is used for preparing the ultra-high performance concrete, the compressive strength ranges from 26.97 MPa to 139.8 MPa, the breaking strength ranges from 6.4 MPa to 20.27 MPa, and the fluidity ranges from 144.5 mm to 162.5 mm. Through organic combination of different types of cementing materials, rapid hardening and early strength of the ultra-high performance concrete are achieved, the performance of the ultra-high performance concrete is improved, and carbon emission is reduced; and the prepared ultra-high performance concrete has the advantages of rapid hardening, early strength, high toughness, high impact resistance, high durability and the like, is suitable for rapid repair and replacement of bridge expansion joint transition areas and other concrete members, and has good popularization and application prospects.

The invention relates to an electronic device capable of multiplexing an SD interface and a USB interface and a method. Multiplexing is carried out on a third pin of an interface multiplexing control device, namely the third pin is both connected to a data pin of the SD interface and a negative signal pin of the USB interface, and the method does not need to respectively arrange the pins to the interface multiplexing control device, the data pin of the SD interface and the negative signal pin of the USB interface, so that the pins multiplexing the interface multiplexing control device are reduced, and thus the pins of the electronic device capable of multiplexing the SD interface and the USB interface are reduced and the cost is saved; and furthermore, the interface multiplexing control device switches a connection between the SD interface and an SD controller and a connection between the USB interface and a USB controller according to a state detection result of the SD interface and a state detection result of the USB interface, so that the switching of the SD interface and the USB interface can be realized, and thus SD interface communication and USB communication can be both realized, and the different functional requirements are met.

The invention discloses a miniature residual current operated circuit breaker. The number of poles is two. The miniature residual current operated circuit breaker consists of an electric leakage trip unit and a circuit breaker, wherein the electric leakage trip unit and the circuit breaker are of an integral overall structure; the lengthening design is utilized for the electric leakage trip unit at a load end; the two-segment type structure of a power end and the load end is adopted for an intermediate base; main circuits of two poles both have short circuit, overload and electric leakage protection functions; mutually independent indication devices are arranged and do not mutually interfere; an electric trip rod slides in a guide groove of a shell through a guide bar; innovative arc initiation structures of a bent equidistant-two-surface cambered plate and the like are adopted for an arc initiation device. The miniature residual current operated circuit breaker provided by the invention has the advantages that the size is ingenious; the structure is compact, concise and reasonable; the industrial automatic production and assembly are convenient; the working state is indicated clearly and accurately; the working stability and reliability are higher; the breaking capacity is high; the service life is long; the dual loop protection is achieved; the miniature residual current operated circuit breaker is more complete and safer.

The invention relates to a preparation method of a high-strength air filter paper. The method includes: mixing a fiber material with water, conducting full defibering and diluting in a defibering device to obtain a base fiber suspension, and then carrying out molding and suction to obtain base molded wet paper; adding a carbon nano-material into a surfactant solution, and carrying out ultrasonic dispersion to obtain a carbon nano-material dispersion; mixing the carbon nano-material dispersion with an adhesive, and then adding water to prepare a mixed diluent; soaking the molded wet paper in the mixed diluent, maintaining the state for 30-40min, then taking the molded wet paper out, conducting suction and drying, and then carrying out sizing and drying to obtain the air filter paper. The method provided by the invention overcomes the defects in the prior art, is high in filtering efficiency and low in filtering resistance through the air filter paper containing the carbon nano material,can filter particle pollutants, and can also remove chemical pollutants and viruses in air; and under the action of current and high voltage, a porous film is formed on the surface of the raw paper,so that the flame-retardant effect of the air filter paper can be improved.

The invention discloses a laser hair removal instrument. The laser hair removal instrument comprises a movable support, a lamp body and two or more optical filters, wherein the optical filters are located on one side of the lamp body; the movable support drives one of the lamp body and the optical filters to move relative to the other one of the lamp body and the optical filters; and the lamp body provides light waves outwards when being aligned with the optical filters. The laser hair removal instrument is provided with the two or more optical filters, a user can make the lamp body be aligned with the different optical filters by adjusting the position of the movable support, and therefore the lamp body can provide the light waves with different wavelengths outwards through the different optical filters. The light waves can be used by the user for achieving different beautifying operations, and the different functional requirements for whitening, skin tendering and the like are met.

The invention discloses a storage tank with compression resistance, fireproof and risk avoidance, which comprises a frame work (1) of a tank body and a door plate (2). The frame work (1) is composed of a top plate (3), a bottom plate (4), two side plates (5) and a back plate (6) and the door plate (2) is articulated at the frontage of the frame work (1) of the tank body by a hinge (18). The storage tank is characterized in that among the top plate (3), the bottom plate (4), the two side plates (5), the back plate (6) and the door plate (2), at least the two side plates (5) are composed by a corrugated steel plate (10). Interior trimming and exterior trimming face plates (7, 9) are fixed at the inner side and the outer side of the corrugated steel plate (10). Fireproofing filling material (8) is filled in a cavity formed between the corrugated steel plate (10) and the interior trimming and exterior trimming face plates (7, 9). A blowhole (14) and a mounting hole (15) are opened in the frame work (1) of the tank body. At least one reinforcing transverse bar (16) and reinforcing upright post (17) can be fixed on the frame work (1) of the tank body and a bottom tape (12) is fixed at the outer side of the bottom plate (4).

The invention discloses a role mining optimization modeling method meeting a user role-usage cardinality constraint. It is assumed that q candidate roles R1, R2, ..., Rq exist, and a set of all the candidate roles also can be represented as R by a matrix; meanwhile, a new Boolean marking variable set {d1, d2, ..., dq} is defined, and when dj is equal to 1, the role j appears; otherwise, the role jdoes not appear; consequently, a formula defined in the specification is workable; when dj is equal to 1, at least one value {c1j, c2j, ..., cnj} is 1, namely, at least one user has the role j, wherein Vj:dj is greater than or equal to dij, and i is greater than or equal to 1 and less than or equal to n; by loosening an integrity constraint in a first problem, a better role result can be mined probably, which is an original intention of research on a second problem; and for modeling the problem, a slack variable x'it is introduced, and under the condition of not exceeding a threshold delta, matrix reconstruction is acceptable.

The invention relates to the technical field of automobiles, particularly to a control method of a variable geometry turbocharger (VGT) nozzle ring actuator. The control method of the VGT nozzle ring actuator provided by the invention comprises the steps that firstly full open and full close mechanical stop positions of a VGT nozzle ring are determined through self learning; then an electronic control unit (ECU) sends an engine mode demand signal to a VGT electronic actuator; and the intervals between the full open and full close mechanical stop positions of the nozzle ring and calibrated full open and full close positions of the ECU are adjusted according to the different working modes of the engine. According to the control method, the VGT actuator performs mode selection according to a mode demand command sent by an engine ECU, the full open and full close positions of different modes of the nozzle ring can be adjusted through the VGT electronic actuator, the operating range of the VGT nozzle ring is flexibly controlled, the requirements of the engine in the aspects such as supercharge pressure responsiveness and supercharger reliability protection are met through VGT parts, and the performances of the supercharger are exerted to the fullest.

The invention provides a portable epidemic prevention autonomous declaration system which can be arranged in different areas according to needs, update two-dimensional code information in time, enablea user to scan the corresponding two-dimensional code information to perform quick registration, and set different information interfaces according to needs to meet different functional requirements.The system comprises a portable two-dimensional code generator and mobile communication terminal code scanning software. The portable two-dimensional code generator comprises an outer frame, a display carrier and a positioning module, the display carrier is arranged in an inner cavity of the outer frame; the display carrier comprises a display layer, a storage battery, a display layer embedded inthe backboard, a driving module and a transmission module. The storage battery is connected with the positioning module, the positioning module, the driving module and the transmission module are electrically connected, the positioning module is used for positioning longitude and latitude in real time and transmitting position information to the transmission module in real time, and the transmission module generates corresponding two-dimensional code information after integrating the position information and feeds back the two-dimensional code information to the display layer.

The invention provides a multi-air-exhaust cooling and heating integrated air curtain with a purifying inner circulation function and further provides a control method thereof. The multi-air-exhaust cooling and heating integrated air curtain comprises a mounting plate, an air cooling system, a control module and a man-machine interaction module. The air cooling system comprises an air cooling unitand an air cooling shell. The air cooling shell is designed to be of a square frame structure. Bolts are reserved on the square frame structure for connecting one or more air heating modules and a purifying-filtering module. Communication ports, probes and controllers which correspond to the air heating modules and the purifying-filtering module are reserved in the control module. The air coolingsystem mainly plays a role in door sealing, an air heating system plays roles in heating and warming, and the purifying-filtering module achieves the function of inner circulation air purifying. According to the multi-air-exhaust cooling and heating integrated air curtain with the purifying inner circulation function, the functions of the purifying inner circulation function, the door sealing energy-saving function, the heating and warming functions and the like are integrated.

The invention relates to an indoor distributed system, a data transmission method and a storage medium. The indoor distributed system comprises a BBU unit, a protocol conversion CB unit, an expansionunit and a far-end unit; the CB unit is in communication connection with the BBU unit and the expansion unit, and the expansion unit is in communication connection with the far-end unit; the CB unit is used for respectively carrying out protocol conversion on the data received from the expansion unit and the BBU unit and sending timing information to the BBU unit; the timing information is used for indicating the BBU to send downlink data or receive uplink data; and the BBU unit is used for carrying out data communication with the CB unit according to the timing information and the data afterprotocol conversion. According to the indoor distributed system, the cost of the BBU unit can be reduced, and different function requirements of users for the BBU unit are met.

The multi-row air cooling and heating integrated air curtain device with purifying internal circulation function provided by the present invention includes a mounting plate, a cooling system, a control module and a human-computer interaction module, the cooling system includes a cooling unit and a cooling shell, the cooling The shell is designed as a square frame structure, bolts are reserved on the square frame structure for connecting at least one air heating module and a purification filter module, and communication ports corresponding to the air heating module and purification filter module are reserved in the control module, detectors and controllers. The cold air system mainly plays the role of sealing the door, the hot air system plays the role of heating and heating, and the purification and filtration module realizes the function of internal circulation to purify the air. And multi-functional integration such as heating and heating. The present invention also provides a control method of the multi-row air cooling and heating integrated air curtain device with purification internal circulation function.

An intelligent platform electric / heating integrated small kitchen appliance system is characterized in that it is composed of an intelligent electric / heating integrated base and a kitchen appliance group. The base mainly includes a physical / intelligent control module and a main working module, which are integrated and constructed into a base entity that can be made of various materials; . The physical / intelligent control module has the function of identifying the technical characteristics of various kitchen appliances and accurately cutting into the operation interface to execute the corresponding working mode and complete the instruction. APP application software for remote control; the main working module provides kinetic energy and heat energy for kitchen appliances. The present invention creates new use value: replace multiple tailless kitchen electric products on an intelligent electric / heating integrated base connected by a power line, avoiding the trouble of plugging and unplugging electrical appliances, flexible intelligent control, high cost performance, and utilization of energy consumption Good rate.

The invention belongs to the field of touch recognition, and provides a protective film of a touch screen and an intelligent touch terminal. The protective film of the touch screen comprises a first bonding layer, a first base material layer, a protection function layer and at least one circuit pattern layer. The circuit pattern layers are located on the two sides of the first base material layer or any one of the two sides of the first base material layer, and / or the circuit pattern layers are located on the two sides of the protection function layer or any one of the two sides of the protection function layer. The circuit pattern layers capable of achieving preset functions are embedded in the protective film of the touch screen to achieve multiple additional functions, the needs of a protected product for different functions are met, an original device of the protected product does not need to be replaced, and on the basis of expanding the functions of the product conveniently, cost is low, and wide application prospects are achieved.

The invention relates to an air filter paper containing a carbon nanomaterial and a preparation method thereof. The preparation method comprises the steps of: (1) adding a fiber material into water, adding acid to adjust the pH value to 2.5-3.5, then performing dispersion, and sending the product to a molding machine for suction so as to obtain molded wet paper; (2) adding a carbon nanomaterial and alcohol ether glucoside into water and conducting ultrasonic dispersion to obtain a carbon nanomaterial dispersion liquid with a carbon nanomaterial mass fraction of 0.1-1%; (3) mixing the carbon nanomaterial dispersion liquid and a binder, then adding water to prepare a mixed diluent in which the total mass percent of the carbon nanomaterial dispersion liquid and the binder is 0.5-5%; and (4) applying the mixed diluent to the molded wet paper. The air filter paper containing the carbon nanomaterial provided by the invention has evenly distributed carbon nanomaterial and high retention rate,and air filter paper containing the carbon nanomaterial with different carbon nanomaterial distribution can be obtained according to actual production needs.

The application relates to an indoor distributed system, a data transmission method and a storage medium. The indoor distributed system includes: a BBU unit, a protocol conversion CB unit, an extension unit and a remote unit, the CB unit communicates with the BBU unit and the extension unit respectively, and the extension unit communicates with the remote unit Communication connection; the CB unit is used to perform protocol conversion on the data received from the extension unit and the BBU unit, and send timing information to the BBU unit; the timing information is used to indicate the BBU The unit sends downlink data or receives uplink data; the BBU unit is used to perform data communication with the CB unit according to the timing information and data after protocol conversion. The indoor distributed system can reduce the cost of the BBU unit and meet different functional requirements of users for the BBU unit.

The present invention relates to a device for low-temperature test of valves, in particular to a plugging device for low-temperature test of back-blowing valves, and also to a plugging method for low-temperature tests of back-blowing valves based on the above-mentioned device, so as to solve the problems of the prior art. After the cryogenic treatment is completed, the residual liquid in the valve cavity will affect the measurement results of the low-temperature sealing test. However, the current method of treating the residual liquid in the valve cavity is low in efficiency and cannot obtain accurate measurement values. The technical solution adopted is a back-blowing valve low-temperature test plugging device, which has a blocking plate, and the blocking plate is provided with a first joint, a second joint, a third joint, and a back-blowing pipe. liquid. The present invention also provides a low-temperature test plugging method for back-blowing valves, including four steps of installing a plugging device, degassing by cryogenic treatment, blowing off residual liquid, and low-temperature sealing test, so as to complete the low-temperature sealing test of the test valve body.