880 results about "Graduated cylinder" patented technology

The invention relates to a testing system for deep soil freezing / thawing process, which is structurally characterized in that a temperature-controlled box is connected with an external cold bath; a high pressure-resistant organic glass cylinder is arranged on a temperature-controllable steel base; two small holes are formed in the base, one is connected with a water guide pipe, and the other is connected with a pressure adjusting pipe; a permeable stone, a piece of filter paper and a sample are sequentially arranged at the upper part of the lower base, and a temperature sensor is mounted in the sample; a temperature-controllable upper press head is arranged at the upper part of the sample; a line leading-out hole is formed in the upper press head, and is sealed through sealant after the line is lead out; the upper press head is connected with the transmission rod of a testing machine; a measuring cylinder is connected with the sample through the water guide pipe; and the measuring cylinder is arranged on a weighing sensor and fixed through a bracket. By adopting the testing system, the freezing / thawing process of the deep soil can be rather systematically researched, so as to obtain the frost heaving rate and the water absorbing / draining rate of the deep soil which is in different depths frozen under the different temperature gradients. The testing system provides the technical guarantee for the research in clarifying the action of the external load on the forming processes of the freezing soil and the frozen soil cold-formed structures, and the mutual action of the temperature, the moisture content and the pressure of the soil body in the process of freezing under the high-pressure action.

A device used for testing permeation performance of hydraulic engineering concrete under load action is prepared forming pressurizing unit by steel chassis, steel plate, steel vertical column, spring, nut and bolt; forming test-piece chamber by sleeve, up-pressing steel plate, down-pressing steel plate, ball base and concrete test-piece. Its testing method is also disclosed.

A method for determining saturated penetration coefficient at thickness and inner surface directions of fiber fabric includes laying presoaked fiber fabric in test mould utilizing flow-dividing plate and four edge of mould cavity to fix network structure of fiber fabric, using solvent to remove off resin in presoaked fiber fabric, exerting pressure on fiber fabric to vary volume friction of fiber, erecting various accessories on said test mould to form different flow channels, using stopwatch and measuring cylinder to record relevant data and combining measured data with Darcy law for calculation out saturated penetration coefficient at thickness and inner surface direction on fiber fabric.

This invention relates to a coal seam gas content quick desorption instrument design to test coal core, quickly and accurately determine coal seam gas content. The invention include computer processing, quick desorption and measuring system. The feature is; Quick desorption system include sample sealable tank and chip sample platform. Sealable tank top has sealing cover, and inter has whip piece. Sealable tank connect with intake pipe and vent-pipe, vent-pipe connect measuring system. Sealable tank fix on platform. Quick desorption system include measuring cylinder and water bottle, measuring cylinder's top link vent-pipe, measuring cylinder's bottom through gas tube connect with water bottle. The effect: this invention can test shattered coal core sample, pick coal seam air content data, quickly appraise this region's coal-seam gas potential stocks and exploration prospects, research differently region gas content characteristic, gas content distribution and coal reservoir bed.

The invention belongs to the field of physical experiment equipment of petroleum and natural gas exploitation, and particularly relates to a heterogeneous reservoir water injection commingling interlayer disturbance simulation system. The system comprises a constant-flux pump, a plurality of containers, a five-way valve, a core holding unit, an X-ray tube, a detector and a data processing and imaging system. The constant-flux pump is connected with the inlet of each container through pipelines; the inlet of the five-way valve is respectively connected with the outlet of each container through pipelines. A left sealing cover of the core holding unit is provided with an injection port, the right sealing cover of the core holding unit is provided with an output port, the inner sides of the left sealing cover and the right sealing cover are sequentially provided with a core end cap rubber mat, a core end cap and a sealing rubber mat from outside to inside, a plurality of circular holes are formed in the core end cap rubber mat, and the core end cap and the sealing rubber mat are provided with a plurality of layer chambers. A plurality of layers of heterogeneous reservoir slab models are arranged in a sealing rubber sleeve. The outlet of the five-way valve is connected with the injection port, and fluid passes through the output port and enters a measuring cylinder. The heterogeneous reservoir water injection commingling layer disturbance simulation system can reflect layer disturbance degree through the composition and size of liquid amount at the output end, and visualized analysis is achieved.

The invention discloses a comprehensive permeability testing machine for measuring vertical permeability coefficient and horizontal permeability coefficient. The invention comprises a constant-pressure water tank which is communicated with two water supply pipes, wherein, one water supply pipe is communicated with an upper pressure chamber; the top of the upper pressure chamber is provided with a barometer and an air-bleed hole and the side face of the upper pressure chamber is provided with an inflating device; the upper pressure chamber is communicated with a lower pressure chamber through an assembly member; the upper part of the lower pressure chamber is provided with a bubble exhaust hole and the lower part of the lower pressure chamber is communicated with a graduated flask through an exhaust pipe and a metered valve; the other water supply pipe is connected to the left of the assembly member; and the assembly member is communicated with the graduated flask through the exhaust pipe and the metered valve and consists of an impervious membrane, silicon rubber, a V-shaped slot board and a pressurized plastic membrane. The comprehensive permeability testing machine has the advantages that: firstly, the pressurized plastic membrane can quickly, precisely and uniformly transfer normal pressure to a sample, and the impervious membrane can prevent leakage of the sidewall; secondly, water flow is uniformly infiltrated into the V-shaped slot; thirdly, due to arrangement of the silicon rubber, the border effect is reduced; fourthly, the whole machine realizes measurement of the vertical permeability coefficient and the horizontal permeability coefficient, and is precise, simple and clean, highly efficient, practical and convenient to operate.

The invention discloses an electroosmosis-load combined consolidometer. An electroosmosis cathode is positioned at a central shaft of a cylinder container which is made of an insulant ,and an electroosmosis anode is arranged to cling to four walls of the cylinder container; a piston type loading cap is arranged at the top of the cylinder container; the center of the soleplate of the cylinder container is provided with a drain hole; the electroosmosis cathode and the electroosmosis anode are respectively connected with the anode and the cathode of a regulated DC power supply which supply voltage; and the loading cap is connected with a lever system which supplies mechanical pressure. The drain hole is connected with a graduated cylinder by a hose to measure the volume of water discharged from soil consolidation; a clock gauge is arranged on the loading cap to measure soil settlement; an exploring tube for measuring voltage distribution and a pore pressure sensor for measuring pressure of water in a pore are arranged in a proper depth of the soil through a pore on the loading cap according to a fixed interval; and the exploring tube and the pore pressure sensor are respectively used for measuring the potential distribution in radial direction of the soil and the pressure of the water in the pore. The invention is mainly applied in electroosmosis-load consolidation test of soft clay, dredged soil, mucky soil, etc.

The invention discloses a visualization experiment device and method for profile control performance evaluation of weak gel of a fractured reservoir. The experiment device comprises a visualization crack module, a water transport intermediate container, a gel transport intermediate container, a displacement pump, a liquid container connected with a liquid inlet of the displacement pump, a measuring cylinder connected with a liquid outlet of the crack module and a vacuum pump for vacuumizing the crack model. The experiment method comprises the following steps: 1, carrying out a dynamic displacement experiment on weak gel in a crack; 2, replacing crack models with different crack widths, and carrying out injection performance and plugging performance evaluation experiments on the weak gel in a plurality of cracks under the conditions of different weak gel viscosities and injection speeds; 3, carrying out data processing. The visualization experiment and device are reasonable in design, favorable in visuality and good in simulation effect, provides convenience for observing the displacement and plugging processes of the weak gel and can be used for testing and recording the injection performance, the plugging performance and the plugging state of the weak gel in the cracks under the conditions of different weak gel properties and different crack widths.

The invention provides a penetration coefficient determination apparatus for a permeable asphalt concrete track board test piece, and a test method thereof. The determination apparatus comprises a test device and a water supply device, and the test device comprises a workbench, an overflow water tank, an upper sleeve, a lower sleeve, two flanges, an electronic thermometer and a measuring cylinder; the outer sidewall of the upper sleeve is provided with water overflow ports connected with the inside of the upper sleeve, the two same flanges are provided with a ring of a slot, and the two flanges and the sleeve are cemented to form an integral body; the lower sleeve is connected through the overflow water tank, and the overflow water tank is provided with an overflow port and a water drainage port; the test piece is placed between the two flanges, a rubber sealing pad is arranged between each of the flanges and the test piece, the flanges are provided with screw holes, and the test piece is fixed through allowing long bolts to traverse through the screw holes and through using nuts; and the water supply device comprises a water storage barrel, a water pump and a power switch. The apparatus has the advantages of reasonable structure, simple operation, satisfactory solving of the seepage problem of the side wall, realization of flexible control of hydraulic gradient, and reasonable and reliable determination result.

The invention claims a hollow fiber membrane filter performance testing device applied to liquid separation and belonging to the technical field of membrane separation process application. It is characterized by comprising a membrane fiber filter element, a columnar membrane filter container, a diaphragm pump, a pressure regulating valve, a positive and negative pressure gauge, a to-be-filtered liquid water distributing slot, a temperature controller and a filtered liquid collecting graduated cylinder. The core part of the device is a membrane fiber filter container composed of a columnar filter container, a membrane fiber filter element, an external thread connector, an internal thread connector, a hollow pipe, a to-be-tested membrane fiber, a capillary connector and a membrane fiber support frame. The membrane fiber filter element is connected with the columnar membrane filter container by the external thread connector and the internal thread connector. The hollow pipe is connected with the to-be-tested membrane fiber by the capillary connector. The membrane fiber support frame is used for supporting the to-be-tested membrane fiber. The invention can be applied to test and valuation of ultrafiltration, microfiltration and hollow fiber membrane flux and can test filter performance of the hollow fiber membrane with different internal / external diameters and internal / external pressure modes in a certain pressure range.

The invention discloses a timed quantitative feeder, and relates to the field of pet raising equipment. The feeder comprises a storage box composed of a shell, a quantitative cylinder and a retaining plate mechanism, the bottom of the storage box is provided with an opening, the quantitative cylinder directly faces the opening, the retaining plate mechanism is provided with a rotating shaft, an upper retaining plate and a lower retaining plate, and the rotating shaft is connected with a torsion spring, pivoted to the shell of the feeder and driven by a motor controlled by a timer. An angle is formed between the upper retaining plate and the lower retaining plate, the lower retaining plate covers the quantitative cylinder, the upper retaining plate rotates away from the opening, and feed falls into the quantitative cylinder to realize quantification. After set time, the timer is connected with a circuit, the motor drives the rotating shaft, the upper retaining plate covers the opening, the lower retaining plate rotates away from the quantitative cylinder, and the feed in the quantitative cylinder falls into a raising pool; after the motor stops rotating, the retaining plates rotate to original positions under the action of the torsion spring to quantify the feed again. The timed quantitative feeder completes feed feeding automatically, and is simple in structure, low in power consumption, capable of adjusting feeding time and feeding amount optionally, and convenient and practical.

The invention provides a test device and method for coal body deformation under the action of true triaxial stress, seepage, adsorption and desorption.The test device comprises a coal sample clamp, a true triaxial stress loading part, a pore pressure loading part, a flow measuring part and a coal sample deformation measuring part.The coal sample clamp is used for clamping and fixing a coal sample.A hydraulic pump of the true triaxial stress loading part applies axial pressure, lateral pressure and circumferential pressure to the coal sample.The pore pressure loading part loads pore pressure to the coal sample through a high-pressure gas cylinder.The flow measuring part comprises a water tank and a measuring cylinder, and a draining gas collection method is adopted for measuring gas flow.The coal sample deformation measuring part comprises a strain gage pasted to the coal sample and connected to a data collector, the data collector is connected to a computer, and the deformation of the coal sample is measured.The test device is used for measuring the coal body deformation of the coal sample under the action of one or a combination of two or three of stress, seepage and adsorption / desorption, and reasonable parameters are provided for gas extraction in a working face coal seam.

The invention discloses an unconventional natural gas content automatic measuring apparatus. The apparatus comprises a gas collection measuring cylinder (3), a balancing measuring cylinder (4), a liquid storage tank (5), a data acquisition and control system (6), a host computer (7) and a lifting device (12) for driving the motion of the gas collection measuring cylinder (3) and the balancing measuring cylinder (4) relative to the liquid storage tank (5), each of the lower ports of the gas collection measuring cylinder (3) and the balancing measuring cylinder (4) is placed below the liquid level of the liquid storage tank (5), a precipitation tank (1) is placed in a constant temperature water-bath box (2), a gas guide tube A (18) is communicated with the precipitation tank (1) and the gas collection measuring cylinder (3), and a gas guide tube B (19) is communicated with the balancing measuring cylinder (4) and outside air. According to the invention, a photoelectric non-contact closed loop measurement and control method is adopted to realize the constant-pressure equal-volume automatic continuous measurement of the content of the natural gas in an unconventional natural gas reservoir sample, and the apparatus has the advantages of simple structure, reliable measurement and analysis results, simple operation, and high measurement precision.

The invention relates to an experimental detecting system and method for distribution of remaining oil in a fracture-cavity reservoir bed. The experimental detecting system comprises a constant-flux pump, a container containing formation water, a container containing compounded crude oil, a container containing a contrast agent, a four-way valve, a fracture-cavity reservoir bed flat model, a core holder, an X-ray tomoscan system and a data processing and imaging system, wherein the container containing formation water, the container containing the compounded crude oil and the container containing the contrast agent are connected with the three inlets of the four-way valve through a first pipeline, a second pipeline and a third pipeline respectively; the outlet of the four-way valve is connected with the injection opening of the core holder through a pumping pipeline; the output opening of the core holder is used for outputting a liquid; the liquid output from the output opening of the core holder is collected in a measuring cylinder. According to the experimental detecting system and method, the oil-water displacement process under a formation condition is simulated actually, and the percolation mechanism and the remaining oil distribution rule are similar to practical water injection in a mine, so that the detection conclusion has a guiding significance in mine application, and the problem that the water injection and oil displacement process cannot be visual is solved.

The invention relates to a device and a method for evaluating foaming performances of a foaming agent under conditions of a high temperature and high pressure. A technical scheme of the invention comprises taking a certain amount of a foaming agent solution, filling gas into a container from a gas inlet located at the bottom of the container so that foam is produced by a gas flow method, stopping gas filling after a preset amount of gas is filled into the container, recording a volume of the foam, wherein the volume characterizes a foaming capacity of the foaming agent solution, starting timing simultaneously, wherein time of production of the foam of which a volume is half of the volume of the foaming agent solution is a foam half-life period and characterizes foam stability, continuously filling gas into the container repeatedly according to a preset flow so that foam is produced continuously, discharging the foam from a back-pressure valve, metering a volume of the foaming agent solution carried by the foam by a metering cylinder at an outlet, stopping gas filling when the total amount of filled gas reaches to a preset amount, and metering a volume of the foaming agent solution carried by the foam, wherein the volume of the foaming agent solution carried by the foam characterizes a liquid carrying capacity of the foam. The device and the method have the advantage that foam is produced by the gas flow method and a gas flow rate and a gas flow amount are controlled and evaluation of a foaming capacity, stability and a liquid carrying capacity of a foaming agent solution under the conditions of a high temperature and high pressure can be realized.

A test device with support is featured as fixing drip barrel on clamp of the support, placing the measuring cylinder on support table and having the two scaled, opening an eyelet at bottom center of drip barrel, using a coverplate to block the eyelet and seeing that the coverplate is able to move out when dripping is required. The size flowability can be evaluated by measuring time of flowing out of drip barrel by certain volume of cement size.

The invention discloses a method for preparing double cross gear, belonging to mechanical process technology. Said double cross gear is formed with left-and-right involutes helicoids, the cross gear center is the cross point of left gear central line and the right one; if the two cross gear is the same phase, the cross gear center 3 on graduated cylinder gear 1 and cross center 4 on gear 2 are at the same bus wire; and if projected on gear graduated circumference, the two cross gear center 3 and 4 are at the same circumferential position; and if the cross gear center 3 and 4 are at different phase, the cross gear 1 and 2 are at the same phase, then s1 equals to s2, and the center distance of left gear and right gear of two cross gears are equal, 11=12; clamping double cross gear blank on digital control milling machine for preparation.

The invention relates to a testing device and a testing method for the water tightness of a cable. The testing device is characterized in that a pressure gauge, a pressure release valve, a water source interface and a pressurizing interface are respectively arranged on a pipe body of a pressure chamber, the two ends of the pipe body of the pressure chamber are respectively provided with a flange in a fixed mode, a fastening nut with a line passing hole or a fastening nut without the line passing hole is screwed at each of the two ends of the pressure chamber through O-ring seals, a measuring cylinder is arranged below the fastening nut with the line passing hole, and a pressuring device is connected with the pressurizing interface. The testing method comprises the following steps of: inserting the manufactured cable into the pressure chamber, sealing the two ends of the pressure chamber by the fastening nuts through the O-ring seals, and placing two ends or one end of the cable extending out of the fastening nuts with the line passing hole in the measuring cylinder; filling the pressure chamber with water; pressuring the pressure chamber; and after ending the test, checking whether water leaks at the two ends of the cable, or measuring the volume of leaking water in the measuring cylinder. The testing device and the testing method can be used for really simulating the high-pressure state under water and effectively detecting the water tightness of the cable and have the characteristics of good repeatability, small errors and the like.

The invention discloses a similar material simulation test system and relates to an apparatus for measuring or testing force, stress and displacement, in particular to a test system for laboratories to simulate and monitor support load and displacement changes by the aid of similar materials during coal bed excavation. The similar material simulation test system is capable of obtaining real-time pressure and displacement of a support when the support interacts with surrounding rocks. The similar material simulation test system comprises a model support 1, at least one movable column 2, pistons 21, vertical columns 3, a first measuring cylinder 5, a second measuring cylinder 6, a radio-frequency capacitive liquid level transmitter 8 and a radio-frequency capacitive liquid level transmitter 9. The insides of the vertical columns 3 are mutually communicated to form a liquid accommodating cavity 4, liquid is arranged in the liquid accommodating cavity, the first measuring cylinder and the second measuring cylinder are higher than the pistons, a connecting tube 7 is communicated between the first measuring cylinder and the second measuring cylinder through side walls of the first measuring cylinder and the second measuring cylinder, the lower end of the first measuring cylinder is communicated with the liquid accommodating cavity 4 through a hose 41, and the two radio-frequency capacitive liquid level transmitter 8 and 9 are used for measuring the liquid level inside the two measuring cylinders.

The invention discloses a device and method capable of simulating oil displacement efficiencies of oil layers with different dip angles in order to explore oil displacement efficiencies generated when different displacing agents are applied to heterogeneity stratums with dip angles. The device is composed of a constant-speed displacement pump, pressure gages, three intermediate containers, a variable-dip-angle core holder, an image analyzer, a measuring cylinder, pipelines and valves, wherein the pipelines and the valves are used for connecting all the parts. The three intermediate containers contain stratum water, crude oil and a displacing agent correspondingly. A tracer agent is added into the displacing agent. By adoption of the device, the dip angle of a core can be changed by changing the dip angle of the core holder, so that the influence of the different dip angles on the oil displacement efficiency is studied, and a relation formula of the liquid production capacity and the dip angle is regressed. By use of the device and method, the flowing law of stratum crude oil in the water flooding or gas flooding process of the stratum with the dip angle can be simulated, so that an appropriate displacing agent is selected preferably and conveniently.

The invention discloses a device for evaluating short-period snow melting performances of a salt-applied snow-self melting road surface. The device provided by the invention comprises an ambient temperature box, an experimental unit, a loading unit and a test unit, wherein the experimental unit, the loading unit and the test unit are arranged in the ambient temperature box. The test unit comprises test pieces, ice and snow bestrewed on the test pieces, a thermal-insulating and water-resisting material arranged each adjacent two of the test pieces, elastic shock pads arranged on the tops of the thermal-insulating and water-resisting materials, porous separator plates arranged at the bottoms of the test pieces, and waterproof material wrapping the test pieces. The loading unit comprises a rolling wheel which can carry out straight reciprocating motion, and a loading device for lifting the rolling wheel, wherein the loading device is installed in a linear-type guide rail and is connected to a radially movable turn plate by a connecting rod and the radially movable turn plate is driven by a motor. The test unit comprises drainage devices, and measuring cylinders which are utilized for holding and measuring solutions and are arranged under the drainage devices, wherein a density measuring instrument and a laser receiving and transmitting device are arranged in each one of the measuring cylinders. The device provided by the invention can be utilized for simulation of a test on short-period snow melting effects of a salt-applied snow-self melting road surface under the action of vehicle rolling, and is mainly utilized for evaluation of short-period snow melting performances of a salt-applied snow-self melting road surface.

The invention relates to asphalt seepage testing devices, in particular to a multi-directional constant-pressure asphalt mixture seepage testing device, aiming at solving the problems that a seepage meter in the prior art is a variable-head seepage meter with the maximum head height being only 0.5m, so that seepage water pressure constancy cannot be achieved and seepage generated by vehicle load under the condition of high head water pressure cannot be simulated; divisional seepage of water flow inside a asphalt mixture cannot be studied. The multi-directional constant-pressure asphalt mixture seepage testing device comprises a seepage mechanism, a seepage mechanism holding tank, a water catcher, a water pressure pipe component, a water tank, a water tank support, a computer control element, a peristaltic pump, a first water level measurement sensor, a measuring cylinder, a second water level measurement sensor and a silicone hose, wherein the seepage mechanism is arranged in the seepage mechanism holding tank, the seepage mechanism holding tank and the measuring cylinder are arranged in the water catcher, the water pressure pipe component is communicated with the seepage mechanism, the water tank is communicated with the water pressure pipe component and the peristaltic pump, and the water catcher is communicated with a water inlet of the peristaltic pump. The multi-directional constant-pressure asphalt mixture seepage testing device is used for the field of mixture seepage testing.

The invention provides variable water head sectional permeation coefficient measuring equipment which comprises a falling head micro-water testing device, a double-plug blocking device and a probe, wherein the micro-water testing device comprises a measuring cylinder and a water leakage shock tube which are connected though a water guide tube; the double-plug blocking device comprises a high-pressure air cylinder, a one-way valve, a pressure gauge, a first plug and a second plug which are connected through a gas guide tube from top to bottom in sequence; a gas valve is further arranged between the one-way valve and the pressure gauge; and the first plug, the water leakage shock tube and the second plug are arranged inside the probe from top to bottom in sequence. The invention further provides a method for measuring the sectional permeation coefficient by using the equipment. The equipment is simple in structure, low in cost and convenient to use; and the first plug and the second plug are swelled to block and isolate a section of drilling holes by compressing air using the high-pressure air cylinder, the permeation coefficient of a water-bearing layer near the drilling holes at the sealed section can be measured by using the micro-water testing device, and the measurement result is accurate.

The invention relates to a method for detecting the compaction degree of a screen in a flat plate reverse osmosis or nano-filtration membrane equipment. The method comprises the following steps: assembling an entering water screen, a flat plate reverse osmosis or nano-filtration membrane sheet, and certain number of generated water screens or entering and generated water mixed screens; adopting tap water without active chlorine as entering water, and operating for certain period of time in a mode of complete cycle so that a reverse osmosis system is operated; after parameters of the generated water are stable, reducing the pressure of the system, closing a generated water valve, opening a resorption pipeline valve, and then turning off a high-pressure pump; and using the pressure difference between a measuring cylinder in a resorption pipeline and an inner membrane of flat plate equipment in the process of stopping the pump to detect the liquid level descending of the measuring cylinder so as to judge whether the screen in the flat plate membrane equipment is compacted tightly, wherein greater amplitude of the liquid level shows that the membrane screen is not compacted tightly, and no descending of the liquid level shows that the screen is compacted tightly.

The invention provides an instrument for testing a permeability coefficient of water-permeable cement concrete. The instrument comprises an upper sectional water container and a lower sectional water container which are connected with each other through a rabbet; a first overflow opening is formed on the head of the upper sectional water container; a plurality of pivots for supporting a water permeability cement concrete test piece to be tested are arranged at the upper end of the lower sectional water container; a second overflow opening is formed below the pivots; the second overflow opening is connected with a water-drainage-height-adjustable water drainage pipe; and a measuring cylinder is arranged below the water drainage pipe. The invention also provides a method for testing the permeability coefficient of the water-permeable cement concrete. The method is easy in operation, and the instrument has a simple structure and is high in measurement precision; and the water permeability cement concrete test piece can be tested on any occasion.

The invention provides a test method for the permeation coefficient of permeable concrete. A base, a measuring cylinder, a support frame and a first sealing ring are adopted for forming a permeation coefficient test instrument of the permeable concrete, the test method for the permeation coefficient of the permeable concrete comprises the step of installing the test instrument onto the ground to be tested, the step of recording the water level scale H1 at the beginning of the timing and the water level scale H2 at the end of the timing and the step of finally calculating the permeation coefficient. The method has the advantages that the structure is simple, the components are simplified, the stability is high, the sealing performance among all components is good, the measurement results have small error and high precision, the result calculation is simplified, in addition, the operation is simple and convenient, and the non-damage test can be carried out in any position in site.

The invention discloses a preparation process for compound recipe ceftiofur oil suspensoid injection. The preparation process comprises the following steps: (1) taking neutral soybean oil, filtrating, heating and sterilizing and cooling down the soybean oil, adding aluminum stearate into the soybean oil to prepare gel, diluting the gel into factice of 2+-0.2 percent through the filtrated and sterilized soybean oil, and filtrating the factice through a No.3 sintered glass funnel for standby; and (2) taking hydrochloric acid ceftiofur / sulbactam according to a recipe, mixing the hydrochloric acid ceftiofur / sulbactam with the factice, grinding the mixture, adding lecithin into the mixture till the mixture is ground evenly, and then obtaining the compound recipe ceftiofur oil suspensoid injection through shifting the ground hydrochloric acid ceftiofur / sulbactam into a graduated cylinder and so on. As the invention adopts the preparation method, compared with a single recipe ceftiofur preparation, the compound recipe ceftiofur oil suspensoid injection has the advantage that the compound recipe ceftiofur oil suspensoid injection has antibacterial activity against bacteria capable of resisting the single recipe ceftiofur, that is, the compound recipe ceftiofur oil suspensoid injection can effectively treat bacterial infection generating ESBLs.

The invention belongs to the technical field of online quantitative weighing and an automatic control system thereof, and in particular relates to a variable speed feeding quantitative weighing system based on a buoyant weighing and sensing principle. A mechanical system of the variable speed feeding quantitative weighing system consists of a feeding mechanism, a feeding machine, a weighing cylinder mechanism, a leverage which transfers a quantitative weighing force value during the weighing, a discharging mechanism, a discharging cylinder, a dowel bar, a buoyant weighing sensor and weights which can adjust the quantitative weighing value; and a programmable logical control (PLC) measurement and control system of the variable speed feeding quantitative weighing system consists of a chord length (L) / instantaneous velocity (V) variation and voltage amplification module, a filter module, an analog (A) / digital (D) conversion module, a PLC central processing module, a display module, a relay part, a feeding mechanism and an electromagnet control device. The basic principle of the system is that after the buoyant weighing sensor compares the measured weighing value with a preset weighing value range, when the output electrical signal value reaches the preset signal value, the PLC measurement and control system can be used for accelerating and slowing down the feeding machine, and thus, the dual purposes of increasing the production efficiency and improving the weighing accuracy are realized.

A large-scale original grade coarse granular soil vertical permeability deformation tester is disclosed. A support is provided with a pedestal. The pedestal is successively provided with a transitioncylinder, a first water-permeable plate, a test cylinder, a water collection cylinder and a top plate. A side wall of the test cylinder is provided with voltage testing units at intervals. The voltagetesting units are connected to the test cylinder. The side wall of the water collection cylinder is provided with a drainage pipe used for installing a drainage valve. The drainage pipe is connectedto a measuring cylinder. A lower portion of the pedestal is connected to one end of a water inlet pipe. The water inlet pipe is provided with a water inlet valve. The other end of the water inlet pipeis connected to a pressure tank. The pressure tank is connected to a frequency conversion adjusting pump group. A pipe network pressure sensor is arranged on a pipe between the pressure tank and thefrequency conversion adjusting pump group. The frequency conversion adjusting pump group is connected to a water tank. The pipe network pressure sensor, the frequency conversion adjusting pump group and a PID regulator are electrically connected. The tester and the method are suitable for determining a blasting stone and gravel stone vertical permeability deformation test of coarse-grained soil whose grain diameter is greater than 600 mm.