63results about How to "Place at random" patented technology

The invention provides a device for hydrophobicity detection and aging evaluation of a composite insulator based on ultraviolet optical characteristics of liquid drop discharge. On the premise of guaranteeing safe operation of electric transmission and transformation equipment, the ultraviolet optical characteristics of discharge of liquid drops on the surface of the composite insulator are obtained effectively and used for reflecting the existing state and distribution of the liquid drops on the surface of the composite insulator and the aging conditions of the composite insulator, and corresponding aging evaluation criteria are provided. By means of the device, hydrophobicity reducing factors causing external insulation flashover accidents can be subjected to early detection and diagnosis, the resolution and accuracy of surface hydrophobicity detection of the composite insulator are improved, and continuity and reliability of power supply and distribution of an electric power system are effectively guaranteed.

The invention discloses a wearable virtual keyboard and an implementation method thereof. The wearable virtual keyboard comprises fingerstalls or finger stickers and data processing output equipment, wherein the fingerstalls or finger stickers are worn on fingers of a user and correspond to fingerprint information and initialization keyboard information respectively; the fingerstalls or the finger stickers are provided with chips for recognizing the fingerprint information of click, sensing contact area information of the fingers and clicking surfaces and transmitting the information to the data processing output equipment according to clicking actions; the data processing output equipment is connected with the fingerstalls or the finger stickers for receiving and analyzing the fingerprint information and the contact area information transmitted by the chips; the data processing output equipment comprises a data processing device and an output display device; the data processing device is used for generating finger input information according to the fingerprint information and the contact area information and transmitting the information to the output display device; the output display device is used for outputting and displaying the finger input information. The wearable virtual keyboard has the characteristics of small space occupation, convenience in carrying, capability of realizing free movement of both hands and high accuracy.

The invention provides a method for hydrophobicity detection and aging evaluation of a composite insulator based on the ultraviolet optical characteristics of liquid drop electric discharge. According to the method, on the premise that safe operation of electric transmission and transformation equipment is guaranteed, the ultraviolet optical characteristics of liquid drop electric discharge on the surface of the composite insulator are effectively obtained and are used for reflecting the existing state and the distribution of the surface liquid drop of the composite insulator and the aging condition of the composite insulator, a corresponding aging evaluation basis is provided, hydrophobicity lowering factors causing an external insulation flashover accident can be detected and judged early, the definition and the accuracy of the surface hydrophobicity detection of the composite insulator are improved, and the continuity and the reliability of power supply and distribution of a power system are effectively guaranteed.

The invention discloses a distributed microphone array multi-sound-source positioning system in a reverberation room. The system mainly solves the problem that the number of microphone array sound sources in the reverberation room is always greater than the number of microphones. The distributed microphone array multi-sound-source positioning system in a reverberation room is characterized by comprising a microphone array consisting of M microphones and a positioning system, wherein a plurality of instructions are stored in the positioning; the instructions are loaded by a processor and restores a block sparse signal by an observation signal X received by M microphones and a compressed observation matrix; and the sparse support set of the block sparse signal S in the space-frequency domaincorresponds to the number and the positions of actual sound sources. The system positions multiple sound sources by using the distributed microphone array having an underdetermined number of microphones in the reverberation room, is not constrained by the array type, and greatly reduces the size of the array compared with current massive arrays with practical values, thereby reducing hardware cost and computational burden.

The invention discloses a total geometric primary defect measuring method of a structural element, which belongs to the field of defect measurement of structural elements. The method comprises the followings steps that: routine measuring tools, namely an ordinary optical theodolite and a vernier calliper, are adopted; the theodolite is arranged on a tripod, the vertical axis of the theodolite is fixed, and a virtual reference line is positioned around the element by a cross wire intersection point by using a lens barrel rotating around a horizontal axis; and the vernier calliper is used for measuring the distance between an edge of the element at different cross sections of the element and the reference line. The element can be transversely or vertically fixed on the ground without special requirements on the field and element auxiliary fixing devices; the measurement precision is greatly improved; and the method is simple and practical.

The invention belongs to the technical field of steel structures in structural engineering and particularly relates to a method for measuring local geometric initial defects of a steel member with a box-shaped section. The method comprises the following steps: respectively measuring vertical distances c1 and c2 from midpoints of two opposite edges on the outer surface of each of four steel plates of the measured steel member with a box-shaped section to a plane formed by four vertexes of the outer surface of the steel plate; measuring the vertical distance c3 from the center of the outer surface of each of four steel plates to the plane formed by the four vertexes of the outer surface of the steel plate; respectively calculating the local geometric initial defect values delta 1, delta 2, delta 3 and delta 4 of the outer surfaces of the four steel plates; and in comparison with the technical standards of the steel member with a box-shaped section, judging the quality of the steel member with a box-shaped section. According to the method, a steel rule and a feeler gauge which are common measurement tools are used for measuring the local geometric initial defects of the steel member with a box-shaped section; and the method has no special requirements on the site and auxiliary fixing devices for the steel member and is applicable to the measurement of local geometric initial defects of the steel member with a box-shaped section and the experimental study on stability performance of the steel member.

The invention discloses a multi-sound source localization method based on distributed microphone arrays in a reverberation room, and mainly solves the problem that the number of microphone array soundsources in the reverberant room is always larger than that of microphones. The method is mainly implemented by steps as follows: (1) constructing a compressed sensing localization algorithm accordingto characteristics of reverberation multi-sound source signal propagation and signal reception of the microphones; (2) constructing a compressed observation matrix with an Image method on the premisethat size of the room and positions of the microphones are known; (3) performing solution with a multi-sound source localization algorithm based on the microphone arrays with an undetermined number in the reverberation room by block sparsity optimization to obtain positions and number of the multiple sound sources in the space. Multi-sound source localization based on the distributed microphone arrays with an undetermined number in the reverberation room is achieved, the method is not constrained by formation, and compared with current mass arrays with practical value, the array size is greatly reduced, so that the hardware cost is reduced, and the computational burden is also reduced.

The invention discloses an intelligent logistics sorting and conveying device based on computer control. The intelligent logistics sorting and conveying device based on computer control comprises a rack. A main conveyor belt is arranged on the rack in a winding mode. Portal frames are stretched over the positions, partition boards on the two sides of a main conveying area. The portal frames are provided with scanners. The partition boards on the two sides of the main conveying area are provided with diversion slots in a through mode. Second driven rollers are movably arranged at the rear endsof the partition boards on the two sides of side conveying areas. Second driving rollers are movably arranged at the front ends of the partition boards on the two sides of side conveying areas. Side conveyor belts are wound around the second driving rollers and the second driven rollers. The intelligent logistics sorting and conveying device based on computer control conveys logistics boxes through driving of the main conveyor belt from the rear end to the front end. When the logistics boxes pass through the portal frames, the upper scanners scan logistics information tags on the logistics boxes and read information and output the information to a logistics control room. According to the logistics information obtained by the logistics control room, electric telescopic rods on the two sidesare controlled through an operator or programmable controller, and the logistics boxes are conveyed to different conveying areas so as to control diversion of the logistics boxes.

The invention discloses an UAV (unmanned aerial vehicle) vibration-absorbing landing bracket, comprising an UAV body, wherein two sides of the bottom end of the UAV body are provided with a support frame; the lower end of the support frame is connected with the landing bracket through a vibration-absorbing column; the vibration-absorbing column is composed of a telescopic sleeve, a telescopic rodand a vibration-absorbing spring group; the lower end of the landing bracket is provided with a bottom frame; a bracket accommodating sleeve is arranged outside the support frame; an anti-turning bracket is arranged outside the landing bracket; the anti-turning bracket is connected with the landing bracket through a rotating shaft; a reinforced pole is arranged between the landing brackets; an article-bearing net is arranged between the reinforced poles; each reinforced pole is provided with an elastic strap and a buckle; the two sides of the UAV body are provided with wings; a propeller is arranged on the wings. In the UAV (unmanned aerial vehicle) vibration-absorbing landing bracket disclosed by the invention, the landing bracket has a good vibration absorbing effect. When the UAV lands,effective vibration-absorbing protection is provided for the UAV body. The landing bracket has anti-turning performance, so that the UAV doesn't turn over during landing.

The invention provides a stereo garage without a movable supporting plate. A fixed comb-tooth-shaped vehicle carrying table is mounted on each parking space, and carrying of vehicles is achieved by a handler. The handler comprises an elevator which can walk left and right. A work platform of the elevator is provided with a movable comb-tooth-shaped vehicle carrying table which can move front and back, and the vertical height of the movable comb-tooth-shaped vehicle carrying table is slightly smaller than the vertical height of the fixed comb-tooth-shaped vehicle carrying table. Comb teeth of the movable comb-tooth-shaped vehicle carrying table are inserted into the comb teeth of the fixed comb-tooth-shaped vehicle carrying table, the movable comb-tooth-shaped vehicle carrying table and the fixed comb-tooth-shaped vehicle carrying table are lifted to move front and back to move the vehicles placed on the fixed comb-tooth-shaped vehicle carrying table, and the handler moves vertically and horizontally to achieve taking and placing of the vehicles in the stereo garage at will. The stereo garage without the movable supporting plate can lower engineering cost, improve the reliability, completely utilize land, and is very suitable for construction of large-scale stereo garages and capable of changing the current condition that parking is difficult.

The invention provides an egg frame structure and a refrigerator. The egg frame structure comprises a protection cover, a supporting frame and an egg storage box; a containing groove with an opening in the upper end is formed in the protection cover, and a limiting part is arranged in the containing groove; the supporting frame is arranged in the containing groove and can do reciprocating motion in the horizontal direction relative to the protection cover, and a lifting part is formed on the supporting frame; the egg storage box is located in the containing groove and supported by the lifting part, a limiting matching part is arranged on the egg storage box and matched with a limiting part, and the egg storage box can be limited to move in the horizontal direction relative to the protection cover; and when the supporting frame moves in the horizontal direction relative to the protection cover, the lifting part drives the egg storage box to move in the vertical direction. The egg frame structure has the beneficial effects of fool mounting and dismounting, complete and lossless eggs or other egg classes are guaranteed, economic losses are reduced, placement at will can be achieved, the space using rate of the refrigerator is increased, and the egg taking and placing processes are simple and practical.

The invention provides a balise signal simulator, comprising an upper computer, an RSG (Reference Signal Generator) host and an RSG reference ring. A user sets a balise signal electrical characteristic, a balise action range, train speed and balise signal envelope amplitude through utilization of upper computer software and sends the parameters to the RSG host. Balise messages are downloaded to the RSG host through utilization of the upper computer software. The user selects a code sending mode and starts / stops sending codes through utilization of the upper computer software. The RSG host receives configuration commands of various parameter settings of the upper computer software, then controls hardware to generate corresponding signals, stores messages, and sends balise signals accordingto a current code sending mode, when a starting command of the upper computer software is received. The balise signals generated by the RSG host are converted into electromagnetic waves through utilization of the RSG reference ring and then are sent out. A user can generate balise application scenes or balise performance wanting to simulate through flexible use of various code sending modes and parameter settings.

A nano modified healthy bamboo charcoal, which taking powdery bamboo charcoal of 20-400 order as main material, produced with slight nano titania and nano titania antibacterial agent. Because of porous structure and high adsorbability of bamboo charcoal, in addition to disassembling adsorbed toxic and harmful substance to carbon dioxide and water that is nontoxic and harmfulless, which is bactericide and disinfection, so the invention can clean effectively indoor air, diminish effluvium, remove dampness, resist to mildew, bactericide and disinfect, which is useful for sterilizing sterilizing ordor remover of fridge, toilet, car wagon.

The invention relates to an anaerobe inoculating device, an anaerobe culturing system and an anaerobe inoculation and culture method. The anaerobe inoculating device comprises a gas bottle, a pressure meter, a vacuum pump, a vacuum meter and a plurality of groups of inoculation needle components. The technical points are as follows: the gas bottle is filled with inert gas; tee joints are arranged among the gas bottle, the vacuum pump and the inoculation needle components; a master control valve and the pressure meter are arranged between the gas bottle and the tee joints; a ventilating valve and the vacuum meter are arranged between the vacuum pump and the tee joints. The anaerobe culturing system consists of the anaerobe inoculating device, a culture vessel and a soft rubber plug. By utilizing the device and the system, free operation can be implemented under an open condition; the device and the system are applicable to culture of anaerobes in various environments, have the advantages of small size, simplicity in operation and low cost and are remarkable in social benefits and economic benefits and wide in application range.

The invention discloses a multi-layer investment casting combination suspension fixture. The multi-layer investment casting combination suspension fixture comprises a first supporting mechanism and asecond supporting mechanism which are separately fixedly provided with a rotary fixing mechanism; the rotary fixing mechanism of each of the first and second supporting mechanisms is movably providedwith a first bearing mechanism and a second bearing mechanism at an equal angle; and each first bearing mechanism is inserted and fixed in the corresponding second bearing mechanism. According to themulti-layer investment casting combination suspension fixture, rotation of the bearing mechanisms of a casting is realized by driving the fixing mechanisms to rotate by motors, so that the casting canbe placed at will at a height which is manually reachable, and placement is convenient and rapid, and can be realized without assistance of external force; meanwhile, distances between the bearing mechanisms is expanded or contracted at any time through effects of threaded rods and limiting plates, so that an available bearing space can be changed; and not only is requirement of the bearing spacemet, but also reasonable utilization of the space can be realized, and no space is wasted.

The invention discloses a multipoint temperature monitoring device and method of a high-voltage switch cabinet and relates to the field of automatic control monitoring. The device consists of two main parts, namely a temperature measuring module and a display panel module. The method comprises the following steps: the temperature sensor module converts temperature into a digital quantity and transmits temperature data obtained by conversion to a first single chip microcomputer, the first single chip microcomputer processes and packets the temperature data and then sends the data to a first radio-frequency transceiver and the first radio-frequency transceiver sends the processed data according to a wireless protocol; and a second radio-frequency transceiver receives the data sent by the radio-frequency transceiver, unpacks the data and transmits the data to the second single chip microcomputer, and the second single chip microcomputer processes the data and transmits the processed data to a display screen module for displaying the temperature data. The multipoint temperature monitoring device is based on a low-power-consumption design and is powered by a battery, is small in system volume, simple and flexible to install, stable in operation, flexible in expansion and low in cost. The multipoint temperature monitoring device can be expanded to other temperature measuring field.

The invention relates to the technical field of animal trap manufacturing, in particular to a clamping plate type mouse trapper. The clamping plate type mouse trapper comprises upper and lower clamping plates, a support, a spring and a handle, wherein a movable pedal is arranged on the surface of an interlayer lower clamping plate of the upper and lower clamping plates; an extension block is arranged in the middle of the left side wall of the other end of the movable pedal; the extension block of the movable pedal is connected to the side wall of a lower top of a linkage ejector rod on an upright rod support in an embedding way; a spring movable plate and a spring supporting rod structure are arranged on the upper part pf the upright rod support; an upper top of the linkage ejector rod is embedded into a connection spring plate; the connection spring plate is embedded into a groove in the left side wall of the upper clamping plate; a curved supporting rod is arranged on the front wall of the left surface of the movable pedal; after a mouse pedals the pedal, the pedal falls off, a linkage mechanism works, and the clamping plate rapidly falls to clamp the mouse. The clamping plate type mouse trapper has the advantages that the movable linkage ejector rod structure is adopted, the clamping plate rapidly falls to clamp the mouse by virtue of the pressure of the spring, the structure is simple, the trapping and killing capacities are strong, the efficiency is high, the cost is low, the setting is convenient, and safety and reliability are realized.

The invention discloses an integrated self-powered relay blind compensation device which comprises a first layer circuit board, a second layer circuit board, a third layer circuit board, a fourth layer circuit board, a fifth layer circuit board and a sixth layer circuit board. The first layer circuit board, the second layer circuit board, the third layer circuit board, the fourth layer circuit board, the fifth layer circuit board and the sixth layer circuit board are sequentially arranged downwards. The invention relates to a wireless signal relay blind compensation device adopting an integrated self-powered scheme. The solar cell panels on the first layer circuit board and the sixth layer circuit board can collect outdoor and indoor photovoltaic energy respectively, and a slot antenna 1 can also collect outdoor microwave energy; wireless energy in various forms can be collected and stored for self-power supply of the relay module; and compared with a traditional relay blind compensation scheme, the provided scheme has the advantages of light weight, low power consumption and self-power supply, can be randomly placed according to requirements, and really realizes dead-angle-free coverage.

The invention relates to the field of articles of everyday use, in particular to a garbage bag, and discloses a garbage bag with a bag opening binding function. The garbage bag comprises a garbage bag body and a bag opening binding device. The bag opening binding device is composed of a binding head, a binding band, an opposite pull rope and a hand pull ring. The problems of secondary pollution and bag opening untight binding prone to being caused in the garbage collection process are solved.

The invention discloses a piston type water spraying mop bucket, which is internally provided with a piston pump (77) and a supporting part used for supporting a mop to rotate, the supporting part canrotate along with a mop head, and the piston pump is driven by rotation of the supporting part. The piston pump works to pump out water in the mop bucket and spray the water on a wiping object of themop so as to finish washing. The piston pump is driven to work by manually pressing the rotary mop or electrically rotating the mop, clear water in the bucket is pumped out and sprayed to the mop through the water pump, the cleaning effect of the mop is improved, and the mop bucket does not need to be connected with a water source and can be placed at will in use.

The invention provides a tumbler toothbrush comprising a toothbrush head and a toothbrush rod, wherein the lower portion of the toothbrush rod is of a water drop shape and is made of materials with high density, and bead bodies with large quantity are arranged inside the bottom of the toothbrush rod. Due to the adoption of the scheme, the tumbler toothbrush can be placed independently without falling off, and is clean and sanitary.

The invention discloses a sealing container for food. The sealing container comprises a container body. A stopper is arranged in an inlet in the upper portion of the container body. A through hole is formed in the stopper. An air valve is arranged in the through hole. The air valve is provided with a channel A and a channel B in the axial direction, and the channel A communicates with the channel B. The aperture of the channel B is larger than that of the channel A. A groove is formed in the upper end of the channel A. A ball body is assembled in the groove. The diameter of the ball body is larger than the aperture of the channel A. The diameter of the ball body is smaller than the aperture of the channel B. A ring sleeve with a through hole is arranged at the upper portion of the channel B. An air bag is arranged at the position, below the stopper, in the inlet in the upper portion of the container body. An opening of the air bag is fixed to the inner wall of the inlet. A sealing cover is arranged on the inlet in the upper portion of the container body. An air hole is formed in the sealing cover. As an improvement, a compression spring is arranged between the ball body and the hole sleeve in the channel B. The sealing container for food is good in sealing effect, stable and reliable in work and easy to convey.

The invention discloses a self saving device for elevators. The device comprises a first wrench plate, a second wrench plate and a screw component; the first wrench plate is provided with a screwed hole, the second wrench plate is provided with a screwed hole, the screw component is provided with a rocker located in the middle of the screw component integrally, and two ends of the screw component are connected to the screw holes of the first wrench plate and second wrench plate respectively. The device has the advantages that the screw component matches with the first and second wrench plates in a screwed manner to allow the same to move outwardly; during usage, the device is inserted into the seam of an elevator door, and the elevator door opens outwardly; the device can be placed in the elevator optionally, and elevator faults and other emergencies can be measured.

The invention discloses an electromobile charging pile based on solar energy generation. The electromobile charging pile comprises a charging pile body, a solar photovoltaic generation plate and a charging gun locking device. The charging gun locking device comprises a circular locking groove for fixing a charging gun and a push rod. The circular locking groove is formed by two semicircular groove-shaped baffles. A side wall of one baffle is connected with one end of a lever, and the other end of the lever is rotatably connected with a head part of the push rod. A tail part of the push rod passes through a fixing block and is connected with a rotary button. The middle of the push rod is further connected with a locking block. The fixing block is provided with a guiding groove matched witha shape of the locking block. A front end face of the fixing block is provided with a limiting plate perpendicular to the guiding groove. A head part of the charging gun is positioned in the chargingpile body. External rainwater and dust can be prevented from entering, and the charging gun is avoided from being randomly placed, so service life of the charging gun is effectively guaranteed.

The invention discloses an intelligent heating device for a new energy automobile, and relates to the field of automobile heating. The problem that an existing heating device needs to be transformed in a vehicle body is solved. The equipment specifically comprises a placement plate, a transmission assembly is fixedly connected to the outer wall of the top of the placement plate, and a heating assembly is fixedly connected to the outer wall of the bottom of the placement plate. The arrangement plate and the heating assembly are arranged, the outer wall of the top of the arrangement plate is provided with the transmission assembly and the rotation assembly which are both installed on the outer wall of the vehicle body, the heating assembly is located in the vehicle body, and the heating assembly is connected with the arrangement plate through the wire, so that when the device is used, the vehicle body does not need to be transformed. Meanwhile, the device can be additionally installed on an existing vehicle body; the operation is very convenient; Meanwhile, the flow guide blocks in the rotating assembly are provided with chamfers, and the two flow guide blocks are installed in the opposite directions, so that the front-back direction does not need to be considered when the placement plate is installed, and smooth air flow can be kept in the driving process.

The invention provides a mosquito dispeller capable of realizing timing. The mosquito dispeller comprises a mosquito dispeller seat and a mosquito dispelling device, wherein the mosquito dispeller seat comprises a timer, a power switch, an LED (Light Emitting Diode) lamp, a groove, a two-pin plug with a wire, air holes and a through hole; the groove and the air holes are arranged in the upper surface of the mosquito dispeller seat; the power switch, the timer and the two-pin plug with the wire are arranged on the side face of the mosquito dispeller seat; the LED lamp is positioned in the mosquito dispeller seat and is connected in series with the timer and the power switch in sequence; the through hole is positioned in the lower end of the mosquito dispeller seat, is provided with internal threads and is connected with the external threads of the mosquito dispelling device. The mosquito dispeller has the beneficial effects that timing can be realized, leakage can be prevented, and the use is convenient.

The invention discloses a water-electrolytic hydrogen making container capable of preventing gas outlet obstruction. The water-electrolytic hydrogen making container comprises an inner container, a housing and multiple waterproof breathable films. The inner container is arranged in the housing. A cavity is formed between the inner container and the housing. The top of the housing is provided with a gas outlet and is communicated with the cavity between the inner container and the housing. The surface of the inner container is provided with multiple micropores at intervals. The waterproof breathable films are arranged on the micropores of the inner container. The water-electrolytic hydrogen making container effectively avoids gas outlet obstruction, avoids the potential safety hazard of the traditional container, realizes random arrangement and guarantees person and equipment safety.

The invention relates to a glass heat insulation mute coffee cup. The glass heat insulation mute coffee cup comprises a coffee tray, a coffee cup, a coffee spoon, a mute spacer and an anti-skid gasket; the mute spacer is placed on the surface of one side of the upper part of the coffee tray; the anti-skid gasket is arranged on the surface of the other side of the coffee tray; the coffee cup is placed and connected to the surface of the upper part of the coffee tray; the surface of one side of the coffee spoon is placed inside the coffee cup; a cup handle on the coffee cup comprises a force bearing arc rod, a slave force cup handle bracket and a master force cup handle bracket; one end of the force bearing arc rod is fixedly connected to the surface of the upper part of the coffee cup; oneend of the force bearing arc rod is fixedly connected to the surface of one end of the slave force cup handle bracket; the surface of the other end of the slave force cup handle bracket is fixedly connected to the surface of one end of the master force cup handle bracket; and the surface of the other end of the master force cup handle bracket is fixedly connected to the surface of the coffee cup.

The invention provides a method for hydrophobicity detection and aging evaluation of a composite insulator based on the ultraviolet optical characteristics of liquid drop electric discharge. According to the method, on the premise that safe operation of electric transmission and transformation equipment is guaranteed, the ultraviolet optical characteristics of liquid drop electric discharge on the surface of the composite insulator are effectively obtained and are used for reflecting the existing state and the distribution of the surface liquid drop of the composite insulator and the aging condition of the composite insulator, a corresponding aging evaluation basis is provided, hydrophobicity lowering factors causing an external insulation flashover accident can be detected and judged early, the definition and the accuracy of the surface hydrophobicity detection of the composite insulator are improved, and the continuity and the reliability of power supply and distribution of a power system are effectively guaranteed.

The invention discloses a test tube based on biomedical science and technology. The test tube comprises a test tube body, an additional hollow tube is connected to the inner wall of the test tube bodyin a sliding mode, a sliding groove is formed in the inner wall of the test tube body, a bottom liquid outlet is formed in the inner wall of the test tube body, and an upper end liquid outlet is formed in the side wall of the test tube body; and the bottom liquid outlet is communicated with the upper end liquid outlet through a flow channel, and a graduated scale is fixedly connected to the sidewall of the test tube body. Through an additional hollow pipe, a threaded rod is driven to rotate by a hand wheel, a sliding block drives the additional hollow pipe to slide in the vertical direction,and when the additional hollow pipe slides out of the test tube body, the additional hollow pipe can indirectly increase the effective volume of the test tube body, so that the test tube body can contain more agents; and under the condition, research and development personnel can add more agents into the test tube body, and the agents do not need to be transferred into the test tube with large volume due to insufficient volume of the test tube.