109results about How to "Sampling operation is convenient" patented technology

The invention discloses a soil sampling device for geological exploration, comprising a support frame, a left column and a right column are vertically and fixedly installed on the support frame, and both the left column and the right column are slidably provided with limiting sliding sleeves , the horizontal plate is fixed horizontally between the limit sliding sleeves, the sliding sleeve on the extension rod is provided with a block fixed on the upper surface of the horizontal plate, and the side wall of the extension rod is marked with a scale line. The structure of the invention is ingenious and the design is reasonable , through the rotation of the first screw rod and the second screw rod, the horizontal plate drives the first half-arc blade and the second half-arc blade downward to sample the soil, and the sampling process is more stable; the discharge push block is relatively limit-oriented The casing slides down, which is convenient to take out the sample soil between the first half-arc blade and the second half-arc blade, which improves the efficiency of soil sampling and can effectively prevent the viscous soil from adhering to the first half-arc blade It is on the inner wall of the second half-arc blade, and it is easy to clean at the same time, which is convenient for the sampling operation again.

The invention belongs to the technical filed of agriculture, particularly relates to a sampling device for soil detection based on agriculture. The method aims at solving problems that soil sampling need manpower to perform; sampling operations of multiple soil layers cannot be performed at the same time, which causes cumbersome sampling; the instability of a device during the sampling causes thesoil to sprinkle, so that it is impossible to sample more soil at one time; and the sampling cannot penetrate into the soil layer when the soil is hard. The invention proposes the following scheme. The sampling device comprises a supporting base. A supporting seat is provided at each corner of the outer walls of the bottom of the supporting base, wherein the number of the supporting seat is four.A supporting disk is provided at the bottom outer wall of each supporting seat. The bottom outer wall of each supporting disk is provided with a rubber pad. One end of the bottom outer wall of the supporting base is provided with a first U-shaped frame. The sampling device for the soil detection based on agriculture ensures the stability of the device during the sampling, prevents soil from sprinkling during the sampling, can simultaneously perform sampling operations on different soil layers, and facilitates convenient and rapid soil classification and storage.

The invention discloses a layered gas-liquid fluid sampling device in a shallow well. The layered gas-liquid fluid sampling device comprises a sleeve system, a simple packer system, a liquid sampling system, a gas sampling system, a sampling system, bolts, and binders, wherein the lower end of a first simple packer is connected with the upper end of a first sleeve through a first layer of bolts and a first layer of binders; the lower end of the first sleeve is connected with the upper end of a second simple packer through a second layer of bolts and a second layer of binders; the lower end of the second simple packer is connected with the upper end of a second sleeve through a third layer of bolts and a third layer of binders; the lower end of the second sleeve is connected with the upper end of a third simple packer through a fourth layer of bolts and a fourth layer of binders. The layered gas-liquid fluid sampling device is simple in structure, low in fabrication cost, convenient to install, and simple and convenient to sample and operate.

The invention relates to a flat single-tube vacuum refining device, belongs to molten alloy treatment, and especially relates to external refining of molten steel. The device comprises a dip tube, a ladle and a buggy ladle. The dip tube consists of an upper vacuum chamber and a melting chamber. A top lance, a vacuum pumping mechanism and a charging mechanism are installed on the dip tube. And the bottom of the ladle is provided with a permeable brick. The device is characterized in that the dip tube has a flat bottom, an approximately elliptic cross section, and two long side walls connected with two short side walls straightly and parallelly, also the arc of the ellipse is concentric with the ladle, the long axis of the ellipse is over a diameter line of the ladle, and a temperature measuring and sampling area forms between the long side walls and the inner wall of the ladle, a temperature measuring and sampling mechanism is arranged deeply in the area, the bottom argon blowing permeable brick is disposed eccentrically, and an air vent of the brick is positioned right below the dip tube. With the advantages of novel conception, simplified and compact structure, easy manufacturing, low cost, convenient operation, the device of the invention improves the stability and reliability of refining, enhances the decarbonization speed, and strengthens decarbonization stability. Being convenient for temperature measuring and sampling, the device provided in the invention ensures a smooth production process, and is beneficial to improve steel quality and lower production cost.

The invention relates to the technical field of chemical equipment, particularly to a sampling device for a reaction kettle. The sampling device for the reaction kettle includes the reaction kettle and a discharge opening, wherein the discharge opening is formed in the bottom of the reaction kettle; a sampling pipe is arranged in the middle of the reaction kettle; a seal head is arranged at the other end of the sampling pipe; a draw rod is arranged in the sampling pipe, and the draw rod is longer than the sampling pipe; a valve is arranged at a sampling opening; a clamping block is arranged at the end of the draw rod inside the sampling pipe, and the size of the clamping block is matched with the inner diameter of the sampling pipe; the other end of the draw rod penetrates the seal head and is provided with a stop block. The sampling device for the reaction kettle adopting the technical scheme avoids wastes and achieves accurate sampling.

The invention, which belongs to the field of geological exploration equipment, discloses a sampling device for mineral geological exploration, thereby solving problems that the sampling operation of the existing mineral geological exploration tool is difficult and the sample is easy to fall when being taken back. The sampling device comprises a sampling rack, a hydraulic lifting rod, a cross beamplate, a first sampler and a second sampler. The hydraulic lifting rod is installed on the sampling rack; the cross beam plate is connected to the top of the hydraulic lifting rod; the first sampler and the second sampler are installed on the cross beam plate to adjust the height of the cross beam plate conveniently; and the first sampler and the second sampler installed on the cross beam plate are used for carrying out sampling on mineral geological explorations. The two samplers can work independently or can work synchronously and cooperatively, so that the efficiency and effect of the mineral geological exploration are improved. When the sample is taken back, the sample is not easy to fall, so that the sampling operation of the mineral geology is realized conveniently.

This invention relates to a microfluidic chip with sampling probe and preparation method thereof, which comprises a substrate with an upper and lower piece, a micro channel, and one or more conical sample probe with pinpoint size in 5um-2mm on micro-channel back input on side wall of the substrate. This invention is simple and practical.

The invention relates to the field of microalgae symbiotic bacteria isolation, specifically speaking, relates to a microalgae symbiotic bacteria isolation medium and separation method, and a high-throughput screening method for key bacteria affecting the growth of microalgae. Improvement can be performed based on a common marine bacterial isolation medium - Zobell 2216E marine broth bacterial culture medium, so that the culture medium for increasing the culturable bacterial species of microalgae phycosphere symbiotic bacteria can be provided, and abundant strain resources can be provided for the screening of key bacteria affecting the growth of microalgae. Through the high-throughput rapid screening method for significantly promoting or inhibiting algae growth bacteria, bacteria having keyinfluences on the growth of the microalgae can be discovered in a short time.

The invention relates to the technical field of highway engineering, and discloses a soil sampling device for highway engineering and a sampling method. The soil sampling device for highway engineering comprises a fixing plate, supporting plates are fixedly mounted on the two sides of the bottom of the fixing plate, and two universal wheels are fixedly mounted at the bottoms of the two supporting plates; a sleeve rod and two threaded rods are rotatably mounted at the top of the fixing plate, a first belt wheel and a second belt wheel are fixedly mounted at the top end of the sleeve rod and the top ends of the two threaded rods correspondingly, the first belt wheel and the two second belt wheels are in transmission connection with the same belt, and a motor and a control panel are fixedly mounted at the top of the fixing plate; and an output shaft of the motor is fixedly connected with the first belt wheel, a control module is arranged in the control panel, and the control module is electrically connected with the motor. The device is reasonable in structural design, relatively high in automation degree, simple and intelligent to operate and convenient for sampling operation, and solves the problems of high labor intensity and time and labor waste due to the need of manually knocking the sampling barrel.

The invention discloses a sampling device for underground water detection, and relates to the technical field of water body sampling; the sampling device comprises support legs; a support frame is fixed on the support legs; a marking mechanism for marking the placing length of a steel wire rope is in transmission connection with a winding mechanism, and an anti-grounding mechanism is vertically and fixedly mounted at the bottom of a settling barrel; the steel wire rope can be placed through the winding mechanism, so that a sampling mechanism can go deep into an underground water body to perform convenient water body sampling operation; a pointer in the arranged marking mechanism can point to the graduated scale by degrees, and an operator can flexibly and accurately adjust and control the submergence depth of the sampling mechanism, and the sampling accuracy is effectively improved; a piston column in the arranged sampling mechanism can achieve vertical sliding adjustment before sampling, the adjusting effect of the initial pre-tightening force of an adjusting spring is achieved, the piston column can adapt to upward jacking force borne by the piston column at different depths, and the effect of flexibly adjusting water taking at different depths is achieved.

The invention provides a sampling and measurement device for civil engineering construction. The sampling and measurement device comprises a construction motor vehicle, a lift device arranged on the construction motor vehicle, a support frame fixed to the bottom portion of the lift device, and a sampling device and a punning and measuring device, which are arranged on the support frame. The devicehas the following advantages: through cooperation of a sampling hydraulic cylinder and a sampling ring cutter, sampling can be realized quickly, and sampling is convenient to operate; and through cooperation of a punning and measuring hydraulic cylinder and a punning die, a sampled soil block can be tightly pressed conveniently, and a measurement pressure plate can be installed at the lower end of the punning and measuring hydraulic cylinder to measure the bearing force of the soil block after being tightly pressed, thereby facilitating measurement of the soil sample. The invention also provides a measurement method of the sampling and measurement device for civil engineering construction. The method is simple and convenient to operate, can accurately simulate the soil sample conditions after punning, and is accurate in data measurement and collection.

The invention discloses a bone tumor sampling fixing device, which comprises an arc seat. A ring is arranged above the arc seat and in rotational fit with the arc seat, a plurality of column barrels are annularly distributed on the inner periphery of the ring, and inner holes of the column barrels are in slide fit with corresponding steel columns. A slide seat is connected to the lower end of a vertical column which is connected to the lower end of the arc seat, and the slide seat is in slide fit with a slide rail at the lower end of the slide seat. The ring can be connected with the arc seatthrough a pair of first connection mechanisms, the steel columns can be connected with the corresponding column barrels through second connection mechanisms, and the slide seat can be connected with the slide rail through a pair of third connection mechanisms. The bone tumor sampling fixing device has advantages that due to adoption of the structure, reliable connection between the arc seat and the ring, between the column barrels and the steel columns and between the slide seat and the slide rail can be realized, reliable bone fixation is realized, and convenience in sampling is achieved.

The invention relates to a saliva sample collection container comprising a tube body used for storing samples and a collection structure used for collecting the samples. A transition structure used for draining the samples collected by the collection structure into the storage tube body is arranged between the tube body and the collection structure, a separator is arranged in the transition structure, a first through hole is arranged in the collection structure, and a second through hole is arranged in the separator. The samples can be stored in the tube body conveniently, smoothly and sanitarily, the samples are ensured not to be contaminated through the multi-sectional collections structure and the transition structure, and the saliva sample collection container is simple in integral structure, convenient for sampling and suitable for wide-range popularization.

The invention discloses an aggregate sampling device, a hot aggregate bin and an asphalt mixing plant. The aggregate sampling device comprises a sampling tube (1), screw conveying blades (2) and a rotary driving device, wherein a sampling port is arranged at one end of the sampling tube (1), the sampling port extends into the hot aggregate bin, the other end of the sampling tube (1) is fixed on the side wall of the hot aggregate bin, a mounting seat is arranged at the fixed end, an unloading outlet is arranged on the sampling tube (1), and the unloading outlet is connected with an unloading branch (5); the screw conveying blades (2) are mounted in the sampling tube (1) and used for conveying aggregate to the unloading branch (5); and one end of a rotating shaft of the screw conveying blades (2) is mounted on the mounting seat and fixedly connected with the rotary driving device, and the rotary driving device is used for driving the screw conveying blades (2) to rotate. By adopting the aggregate sampling device, the sampling depth can be increased, so that the accuracy in aggregate sampling can be further improved, and the operation is simple and convenient.

The invention discloses a sampling valve for chemical pipeline medium sampling, and belongs to the technical field of valves. The sampling valve comprises a valve body, a valve cover, a valve core ball and a valve rod, the valve body and the valve cover are fixedly connected to form a valve cavity, the valve cavity is in dynamic seal fit with the outer surface of the valve core ball, the lower endof the valve rod is fixedly connected with the valve core ball, and the upper end of the valve rod is connected with a handle; and the sampling valve is characterized in that the valve core ball is of a solid ball body structure, a sampling opening is formed in one side of the valve core ball, the rotation angle of the handle is set to be 180 degrees, when the handle is located at two extreme positions, the sampling opening is aligned with fluid channels of the valve body and the valve cover respectively, and the port of the valve cover is connected with a sampling bottle. The valve element can effectively rotate by 180 degrees, it is guaranteed that liquid obtained from the sampling opening is conveyed out of the valve body after the valve element is rotated by 180 degrees, the samplingefficiency of the spherical valve is improved, the volume of the sampled liquid is guaranteed, and waste of raw material is avoided.

The invention discloses a field mineral product sampling device. The device comprises a machine frame fixedly connected to the ground through bolts, a drilling driving mechanism arranged on the innerside of the machine frame in a lifting mode, a drilling rod detachably and fixedly connected with the bottom of the drilling driving mechanism and a sampling mechanism, wherein the machine frame comprises four sets of supporting frames, a first stabilizing ring is rotatably connected among the top ends of the four side supporting frames, inclined supporting frames are rotatably connected to the inner sides of the middle sections of the four side supporting frames, and a second stabilizing ring is rotatably connected among the four inclined supporting frames. According to the field mineral product sampling device, four sets of side supporting frames are arranged to be matched with four inclined supporting frames to support an upper set of stabilizing rings and a lower set of stabilizing rings, and a stable and firm frame can be formed after a guide rod longitudinally penetrates through the interior of each side supporting frame, so a drilling mechanism can stably slide downwards to drill holes, and the side supporting frames are telescopic and can adapt to bumpy ground; and the rack can be quickly contracted, so the occupied space is reduced, and the device is more convenient to use.

The invention discloses a method for quantitatively identifying holes in leading wire melting trace. The method comprises the following steps: 1) extracting a leading wire sample with a melting trace; 2) judging whether the leading wire sample is a single stranded wire or not, and determining the equivalent diameter d0 of the unmelted segment of the leading wire; 3) extracting a leading wire melting trace sample, and detecting the mass ms of the melting trace sample by using an analytical balance; 4) detecting the volume Vs of the melting trace sample by using a buoyancy technology; 5) calculating the equivalent weight rho c of the melting trace; and 6) calculating the equivalent hole rate Pc of the melting trace. The volume of the leading wire melting trace sample is detected through the buoyancy technology, the diameter of the leading wire and the density of the melting trace sample are equivalently processed, and the equivalent hole rate of the holes in the leading wire melting trace is finally calculated, so the disadvantage of unable accurate quantitative detection of the hole rate in the melting trace of metallographic identification methods is made up, the quantitative identification of the holes in the melting trace is realized, and the accuracy of a material evidence identification result is increased.

The invention discloses an efficient reaction kettle with a convenient sampling function and belongs to the field of chemical industry equipment. The problem is solved that for an existing reaction kettle, during material liquid flowing mixing and discharging, sampling is difficult. The efficient reaction kettle is characterized by comprising a reaction kettle body and a reaction kettle cover, thereaction kettle body is connected with the reaction kettle cover to form a reaction kettle device, and a liquid discharging pipe is connected to the bottom of the reaction kettle body and connected with a return pipe; a circulation pump is installed on the return pipe, and a sampling pipe is connected to the return pipe; material liquid is easily mixed under stirring of a stirring rod, the material liquid input by a liquid inlet pipe is sprayed out from liquid outlets in the stirring rod and evenly mixed with the material liquid in the reaction kettle body along with rotation and stirring ofthe stirring rod, and the mixing effect is good. Meanwhile, the material liquid in a reaction cavity is conveniently discharged, the material liquid is conveniently added, circulation flowing of the material liquid in the reaction cavity is conveniently achieved, so that the material liquid is sufficiently mixed, and convenience is also provided for sampling operation of the material liquid.

The invention discloses a method and device for multi-layer sampling of gas and water in a drill hole. The method comprises the following steps of: A, putting a water suction pump and a packer in a specified layer position in the drill hole; B, opening a nitrogen cylinder, adjusting a pressure reducing valve, injecting nitrogen into the packer through a setting pipe, and realizing setting of the packer; C, switching on a power supply, and starting the water suction pump for sampling; D, after sampling, switching off the power supply, turning off the water suction pump, and releasing nitrogen in the packer to realize deblocking of the packer; and E, lifting the packer and the water suction pump to the depth, and carrying out gas and water multi-layer sampling at the inner layer position ofthe drill hole. The water suction pump is connected with the packer through a drill rod, a water suction pump cable penetrates through the packer and is connected with the power supply; the packer isconnected with the pressure reducing valve and the nitrogen cylinder through the setting pipe, the packer is connected with a gas and water separation device through the drill rod; an upper outlet isconnected with a gas sampling bag; and a lower outlet is connected with a water sampling bottle. The device has the advantages of simple principle, clear structure, low cost, convenience in installation, simplicity and convenience in sampling, accurate and credible result and good application prospect.

The invention discloses a pulmonary tuberculosis sampler, which comprises a supporting column, an electric telescopic rod, a cleaning box and a positive and negative motor, wherein a top cover is fixedly mounted above the supporting column, a sampling needle tube is connected to the middle of the upper part of the top cover, a piston rod is connected to the inner side of the sampling needle tube,a groove is formed in the lower portion of the left side of the piston rod, an electric telescopic rod is fixedly installed on the left side of the top cover, a sliding groove is formed in the inner surface of the supporting column, a rotating rod is rotatably connected to the bottom of the supporting column, and a connecting block is welded to the inner side of the cleaning box. According to thepulmonary tuberculosis sampler, the positive and negative motor can drive the rotating gear to be meshed with tooth blocks on the surface of the sampling needle tube, so that the sampling needle tubecan conveniently move up and down on the surface of the top cover, the sampler can be conveniently and automatically inserted into a cup for containing pathogen sputum of pulmonary tuberculosis, and the rod body of the sampler can conveniently extend upwards and conveniently drive the piston rod to move upwards for sampling operation by matching with the electric telescopic rod.

The invention provides a night soil sampling and filtering and parasite concentrating apparatus. The apparatus comprises: a sample storage container; and a sampling and filtering device including a sampling spoon, a barrel-shaped filter screen and an installation handle, wherein the sampling spoon includes a spoon head and a connecting rod, the spoon head is connected with one end of the filter screen through the connecting rod, the other end of the filter screen is in sealed connection with the installation handle, and the installation handle is detachably connected with the sample storage container. The sampling and filtering and parasite concentrating apparatus adopting the above structure has the advantages of simple structure, good sealing performance, and convenient storage and removal of a sample; the filter screen is barrel-shaped, so the filtering area is increased, thereby the filtering efficiency is further improved, and the subsequent processing speed of the sample is accelerated; and the wide-aperture filtration pores are increased, so detection of large-diameter suspending protozoa difficult to centrifuge is facilitated.

The invention discloses an intelligent oxygen-consuming microorganism culture device. Through arrangement of a mounting cavity, a ball screw, a screw nut, a connecting block, a sleeve and a forward-backward rotating motor, sampling and other operation are convenient. By arranging a rotating rod and a servo motor, a culture rack can be rotated, and sampling operation is carried out conveniently andquickly on culture dishes in different directions and at different angles. By arranging first annular slide rails, second annular slide rails, first sliding pieces and second sliding pieces, the first sliding pieces can slide in the first annular slide rails and the second sliding pieces can slide in the second annular slide rails during a lifting and rotation operation process of the culture rack, assistance can be provided, and the stability of the device during operation is enhanced. By arranging fluorescent lamps, heating pipes, temperature sensors and oxygen concentration sensors, illumination and temperature required by microorganism culture can be provided for the culture rack, and the internal temperature and oxygen concentration of a housing can be adjusted.

The invention discloses a chip sample delayering grinding method, and belongs to the field of chip test and analysis. The chip sample delayering grinding method is implemented based on a chip sample grinding device. The chip sample grinding device comprises a base, wherein a supporting frame is arranged on the upper side of the base, a through groove is formed in the position, opposite to a chip groove, of the middle of the top face of the supporting frame, a fixing box is arranged on the right side of the top face of the supporting frame, a threaded hole is formed in the middle of the top face of the fixing box, a metal hose is connected with the upper end of the threaded hole, a collecting bottle is arranged in the fixing box, external threads are arranged on the outer wall of the open end of the collecting bottle, a filter screen is embedded in the middle of the bottom face of the collecting bottle, and a fixed-point sampling assembly is arranged below the left side of the metal hose. In this way, the accuracy of the grinding sampling work of the fault area of the chip is improved, samples in other areas are prevented from being mixed with the sample, the effectiveness of analysis results is improved, and great help is provided for workers to analyze the cause of the fault of the chip.

The invention relates to the technical field of water environment monitoring, in particular to a sewage classification sampling device for water environment monitoring. The device comprises a supporting module; the supporting module is fixedly connected with a power module; the power module is in transmission connection with a plurality of sampling modules; each sampling module comprises a sampling rod; a toothed plate I in transmission connection with the power module is fixedly connected to the side surface of each sampling rod; an inserting groove is formed in the top surface of each sampling rod; and an inserting block in sliding connection with the inserting groove of the adjacent sampling module is fixedly connected to the bottom surface of the sampling rod. According to the sewage classification sampling device for water environment monitoring of the invention, a plug pin I is in sliding connection with the inserting block of the adjacent sampling module, and therefore, duringduring transportation, the plug pin can be pulled out, the two sampling modules can be separated; the plurality of sampling modules can be connected in sequence, classified sampling is carried out through sampling cylinders on the sampling modules; the sampling rods are shorter, so that the operation and the transportation are convenient; and a certain number of sampling modules can be connected asrequired, so that the use is more flexible.

The invention discloses a nitrogen-charging black tea fermenting method and relates to a tea production method. The method comprises five steps including a preparation stage, a green tea adding state, a fermentation stage, a nitrogen charging state and a fermentation stopping stage, wherein at the nitrogen charging stage, nitrogen is charged into a fermentation tank, so that the nitrogen content of the fermentation tank is gradually increased from 70% to 90%; at the fermentation stopping stage, tea in the fermentation tank is sampled once every 2-5 minutes, the color and the aroma of the tea are compared, and air introduction is stopped after the tea aroma meets the requirements. The content of nitrogen in the air can be increased and the oxygen content can be reduced through nitrogen charging, so that the fermentation time can be prolonged, and sampling analysis is facilitated.

The invention discloses a three-way catheter joint for preventing backflow, and relates to a medical instrument. The three-way catheter joint comprises a T-shaped joint body, and a catheter connector, a urine collecting bag connector and a sampling connector are formed in the joint body. The catheter connector is gradually enlarged in the flowing direction, a fixed ring and a ball are arranged in the catheter connector, the ball is located on the inlet side of the catheter connector, and a compression spring is arranged between the ball and the fixed ring. Twisted grain is arranged on the outer surface of the catheter connector; a movable inserting part is further arranged on the joint body, the tail end of the inserting part is located in the sampling connector, and the beginning end of the inserting part penetrates through the joint body to the outside. A through hole communicated with the catheter connector and the urine collecting bag connector is formed in the inserting part; an inclined gap is formed in the tail end of the inserting part and located in the catheter connector side. The three-way catheter joint is simple in structure and good in sealing performance, sampling is convenient, and leakage and backflow of urine are effectively avoided.

The invention relates to a grain sampling machine. The grain sampling machine comprises a cantilever rack arranged at the upper end of an upright column, wherein the cantilever rack is driven by a rotating mechanism to rotate around the upright column, a moving rack is arranged on the cantilever rack, a first feed guiding unit and a second feed guiding unit are arranged on the moving rack, each of the first feed guiding unit and the second feed guiding unit comprises a rotating shaft extending out of the moving rack, a driving wheel is arranged on the rotating shaft, a transmission chain is arranged on the two driving wheels and is further connected with a motor, a tension wheel is arranged on the moving rack and matched with the transmission chain, a detection wheel is further arranged between the tension wheel and the motor, is in abutting fit with the back surface of the transmission chain and is arranged on a stretching and retracting support, the stretching and retracting support is arranged on the moving rack and stretches and retracts horizontally, a proximity switch is arranged on a stretching and retracting path of the stretching and retracting support and is used for controlling power on and power off of the motor, the motor is powered off by the proximity switch, so that the phenomenon that a sampling tube is bent and scrapped or the phenomenon that the motor cannot rotate and is burnt due to overheat is avoided, and a driving mechanism and the sampling tube are protected.

The invention relates to a grain sampler. The grain sampler comprises a cantilever frame arranged at the upper end of a stand column and extending horizontally, and a rotating mechanism is arranged between the cantilever frame and the stand column; a moving frame is arranged on the cantilever frame and moves in the length direction of the cantilever frame in a reciprocating mode, a first guiding and conveying unit and a second guiding and conveying unit are arranged on the moving frame, a clamping opening for clamping a sampling tube is formed in the region between a conveying belt of the first guiding and conveying unit and a conveying belt of the second guiding and conveying unit, and a power mechanism drives a driving gear of the first guiding and conveying unit and a driving gear of the second guiding and conveying unit to rotate in opposite directions; the upper end of the sampling tube is communicated with a feed port of a sampling barrel through a pipeline, and an extraction opening is formed in the sampling barrel and communicated with an extraction opening of an exhaust fan. The grain sampler can obtain representative detection samples and improve grain sampling accuracy, and sampling operation is convenient and fast.

The invention provides a land ecosystem carbon cycle research sampling device, which belongs to the technical field of soil detection, and comprises a soil sampling cylinder body, a soil sampling handle, a pedal plate, a movable cover plate and a movable cover plate semi-automatic opening device, wherein a pedal is fixedly connected to the top end of the soil sampling barrel, a soil sampling knifeis fixedly connected to the bottom end of the soil sampling barrel, a sampling window extending along the axis of the barrel is formed in the side wall of the barrel, and scale marks for displaying the sampling depth are engraved in the outer wall, close to the sampling window, of the soil sampling barrel; the center of the upper end surface of the pedal is fixedly connected with a soil samplinghandle through a connecting rod, and the soil sampling handle is located right above the pedal; the upper surface and the lower surface of the soil sampling handle are both fixedly connected with a plurality of anti-skid rubber protruding strips, the sampling window is tightly covered with a movable cover plate, and the movable cover plate is connected with the pedal through a movable cover platesemi-automatic opening device, so that soil can be sampled at any depth, the accuracy of experimental results is improved, and smooth sampling is facilitated.

The invention discloses a medical sampling three-way valve, and belongs to the technical field of sampling valves. The medical sampling three-way valve is characterized by comprising a valve body (1) and a valve rod (3) which can be arranged in the valve body (1) in an axial sliding manner, wherein a liquid inlet runner (10) and a liquid outlet runner (11) which communicate with each other are arranged on the valve body (1); a sampling runner (13) is further arranged on the valve rod (3); an elastic sealing barrel (6) is arranged on the valve rod (3) in the valve body (1) in a sleeved manner; the lower end of the elastic sealing barrel (6) is in sealing connection to the inner wall of the valve body (1); the upper end of the elastic sealing barrel (6) is in sealing connection to the valve rod (3); and the lower end of the sampling runner (13) is arranged on the side wall of the valve rod (3) in the elastic sealing barrel (6). The medical sampling three-way valve is simple to operate, and does not contaminate a sample; the valve body and the valve rod are good in corrosion resistance, so that pollution on a pipeline is not caused; and the elastic sealing barrel is good in sealing effect, so that the problem that the environment is polluted due to the fact that ozone gas or ozone water leaks through the sampling runner is avoided.