CN104614019B - metering device for liquid - Google Patents

metering device for liquid Download PDF

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Publication number
CN104614019B
CN104614019B CN201510041721.1A CN201510041721A CN104614019B CN 104614019 B CN104614019 B CN 104614019B CN 201510041721 A CN201510041721 A CN 201510041721A CN 104614019 B CN104614019 B CN 104614019B
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liquid
metering
measuring tank
valves
check
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CN104614019A (en
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邱绍勇
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BEIJING YUANTAIDA ENVIRONMENTAL PROTECTION BUILDING MATERIAL TECHNOLOGY CO., LTD.
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Beijing Teda Environmental Protection Technology Co Ltd
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Abstract

The invention discloses a three level quick metering device for liquid. According to the three level quick metering device for the liquid, a feed port is arranged at the upper end of a material box, and in a sunken inverted taper shape, the material box and a measuring tank are communicated through a feed pipe arranged between the material box and the measuring tank, a check valve is arranged on a feed pipe, one end of the measuring tank, communicated with the material box, is further provided with a discharge port, a discharge pipe passes through the discharge port, another check valve is installed on the discharge pipe, a material carrying tray is arranged below the check valve on the discharge pipe, the upper end of a transmission shaft is connected with a piston, the lower end of the transmission shaft is connected with a motor, and furthermore a distance sensor is arranged at the upper end of the transmission shaft. The invention further discloses a method which uses the three level quick metering device for the liquid. The three level quick metering device for the liquid adopts three level quick metering, can greatly improve metering accuracy, and simultaneously is simple to use, low in cost and long in use life.

Description

For the metering device of liquid
Technical field
The present invention relates to metering device apparatus field, specifically a kind of metering device for liquid, more particularly to A kind of accurate quick metering device of the three-level for liquid.
Technical background
The demand to the building materials such as cement, concrete, stable soil, mortar, sandstone that deepens continuously of China's urbanization is significantly carried Rise.Now with going deep into for new Urbanization Construction, investing money in developing for future city economic circle is expected to accelerate, east Jing-jin-ji region, The Yangtze River Delta, the economic circle of these relative maturities of Pearl River Delta can be lifted further, and central and west regions can accelerate to form new Motive force of growth, the demand of above-mentioned building materials will be further increased.Statistics shows that China's urbanization rate often lifts a percentage Point, it will have 10,000,000 populations to be transferred to city.According to the 30 square metres of calculating of everyone living space, 300,000,000 squares need to be increased newly every year The house of rice, if needing 0.2 ton of cement to calculate according to every square metre of housing construction, urbanization rate often lifts one percentage point and will draw 0.6 hundred million tons of dynamic cement demand.In addition, the annual Committee of Development and Reform has also examined the bases such as some inter-city passenger rails, highway, airport and harbour Build project.With project funds in place, these projects will go into operation successively, and by becoming the another of the building materials demands such as such as cement is stimulated Individual key factor.In addition, from the point of view of construction period and flow process, the construction of metro project generally requires 4-5, therefore including commodity The raw material supplies such as concrete, cement, sandstone may increase in explosion type.
At present, liquid, such as water and various additives are required to substantially in the preparation of building materials, for its composition metering Accuracy directly influences the performance of building material product, or even has decisive influence, but existing for building material product manufacture Liquid metering device often precision is not high, cause the big heavy discount of performance of obtained product, or using high-precision solidifying After glue measuring equipment, although precision improves, but its equipment is often complex, and cost is very high.Or, existing liquid Body metering product is much suitable only for the metering of water, for for example additional agent solution of mordant liquid is (such as cement liquid Grinding aid) there is no tolerance.
CN101586983A discloses the metering device in a kind of concrete batch plant, and specifically a kind of cement exists Line metering device, the cement on-line metering device, including weighing hopper underframe and the weighing hopper on weighing hopper underframe top is installed on, It is characterized in that:Conveying worm suspension bracket is set in the upper side of weighing hopper underframe, is arranged below conveying worm suspension bracket Pulling force LOAD CELLS;The feed end of conveying worm is arranged on the middle part of weighing hopper underframe, and the discharge end of conveying worm connects It is connected on below tension scale sensor;There is star to unload between the feed end of conveying worm and the discharging opening below weighing hopper Material valve;At least 3 pressure and weighting transducers are arranged symmetrically at the top of weighing hopper underframe, the weighing hopper is fixed on the pressure On power LOAD CELLS.
CN103419283A discloses a kind of continous way cement-weighting device, including metering screw, metering screw drive and subtract Fast machine, feed rotary valve, feed rotary valve motor, Industry Control computer, feed rotary valve frequency converter, weight sensor, its feature It is:Drawing is hung for pull-type weight sensor and metering screw to be connected, Industry Control computer is electrically connected with PC application Connect, the input signal end of PC application is electrically connected by weight transmitter with pull-type weight sensor, programmable The input signal end of controller PLC electrically connects with the encoder for being placed in metering screw shaft end, the output of PC application Signal end is connected by metering screw frequency converter with metering screw, the output signal end of PC application successively with give Material rotary valve frequency converter, the motor electrical connection of feed rotary valve.
CN103157544A discloses a kind of adding liquid cement grinding aid metering device, including cement grinding aid storage Groove, liquid material measuring pump, liquid material compensator and liquid material balance pipe, the bottom of cement grinding aid storage tank passes through first Connecting tube is connected with the bottom of liquid material compensator, and the bottom of liquid material compensator is by the second connecting tube and liquid material The side connection of measuring pump, the opposite side of measuring pump is provided with discharge nozzle, and one end of liquid material balance pipe is connected to cement The top of agent storage tank, the other end of liquid material balance pipe is connected to the top of liquid material compensator;The present invention is by water Increase a liquid material compensator between cement grinding aids storage tank and liquid material measuring pump, in cement grinding aid storage tank and liquid A piece liquid material balance pipe is set between material balance tank so that the material into liquid material measuring pump obtains an equilibrium Thing pressure, it is ensured that the amount of the grinding aid being added in grinding machine is equalized.
CN202836632U discloses a kind of cement grinding aid automatic metering system, and it includes grinding aid measuring pump, grinding aid Agent holding vessel, flowmeter, cement mill, DCS system switch board and host computer, the exit of the grinding aid holding vessel is provided with institute Grinding aid measuring pump is stated, the outlet of the grinding aid holding vessel is connected with the entrance of the grinding aid measuring pump by pipeline, institute The outlet for stating grinding aid measuring pump is connected with the entrance of the cement mill by pipeline, connects outlet and the institute of the measuring pump The pipeline for stating the entrance of cement mill is provided with the flowmeter.
CN102310484A discloses a kind of drawing-type metering device, proportioning station and concrete mixing plant, and it is pull-type metering Device, including pulling type sensor and the weighing hopper being arranged on below pulling type sensor, and connection pulling type sensor and weighing hopper Flexible connecting device.Proportioning station of the invention, is provided with above-mentioned drawing-type metering device.Concrete of the invention Mixing plant, is provided with above-mentioned proportioning station or drawing-type metering device.
EP1405705A1 discloses a kind of metering device of concrete material, it is characterised in that it has following part: The aggregate feeding mechanism of supply aggregate;Water supply installation;House and measure the aggregate meter that above-mentioned aggregate feeding mechanism supplies aggregate Amount storehouse;Measuring tank, the measuring tank is supplied for housing the aggregate for being supplied above-mentioned aggregate feeding mechanism with above-mentioned water supply installation The water logging aggregate that the water answered is mixed, and equipped with energy free switch, bottom opening can be made to keep the bottom of watertightness;Meter The water logging aggregate weight measuring device of the weight of the water logging aggregate surveyed in above-mentioned measuring tank;Measure the water logging bone in above-mentioned measuring tank The water level measuring device of the water level of material;And water level holding meanss, the water level holding meanss are in order that the water in above-mentioned measuring tank The water level of leaching aggregate is maintained on required water level, will be suctioned out from above-mentioned measuring tank more than the water of the required water level, And measure above-mentioned water absorption;Above-mentioned water level holding meanss are made up of following each several part:It is arranged to the suction hose being freely lifted;With Above-mentioned suction hose connects and connects and connect, for the water suction metering accumulator tank of the water yield of First Astronautic Research Institute for Measurement and Test's suction;And with the suction The getter device that water metering accumulator tank connects and connects;And so that above-mentioned aggregate feeding mechanism can distinguish in above-mentioned aggregate It is supplied to above-mentioned aggregate measuring bin and above-mentioned measuring tank.
US2007163333A1 discloses a kind of metering device of concrete material, it is characterized by:The concrete material Metering device be made up of aggregate feeder hopper, measuring tank, liquid level emasuring device, apparatus for measuring quality;Wherein, aggregate feed leakage Bucket provides aggregate;Measuring tank accommodates the water logging aggregate of the aggregate and water formation come from the aggregate feeder hopper;Liquid level emasuring device The measuring tank top is arranged on, measurement is mounted in the liquid level of the water logging aggregate in the measuring tank;Apparatus for measuring quality is measured The quality of the water logging aggregate being mounted in the measuring tank.
WO02060665A1 discloses a kind of metering device of concrete material, it is characterized by:The concrete material Metering device is made up of aggregate feeder hopper, measuring tank, liquid level emasuring device, apparatus for measuring quality;Wherein, aggregate feeder hopper Aggregate is provided;Measuring tank accommodates the water logging aggregate of the aggregate and water formation come from the aggregate feeder hopper;Liquid level emasuring device sets Put above the measuring tank, measurement is mounted in the liquid level of the water logging aggregate in the measuring tank;Apparatus for measuring quality measurement dress The quality of the water logging aggregate in the measuring tank.
" application of the Subtraction method metering device in manufacture of cement ", Wang Chuandong, Chinese building material magazine is the 1st phase in 1989, public Driven a kind of Subtraction method metering device, its lean on control section (single-chip microcomputer, simulation instrument) ceaselessly calculate each time interval- In cycle, the reduction of feed bin weight is realizing.It is characterized in that measuring accuracy is high, its feed bin weighting manner substantially belongs to static Metering, it is not affected by factors such as null offsets, thus measuring accuracy is higher than belted electronic balance, helix balance, impulse flowmeter Deng dynamic metering device;Adapt to weight range greatly, general continuous scale is difficult to the metering of the especially big or special small powder for completing, and it can be complete Into.As long as system is equipped with different feed bins, hopper and corresponding sensor, precision can reach more than 0.5%;Adapt to material scope Extensively.Subtraction method metering device input and output material part adopts and is flexible coupling, the different discharging executing agency of adapted using storehouse formula structure, because And powdery, granular material are applicable to, it is also applied for sticky or thin liquid;The charging/discharging device of system is using complete close Envelope mode, can prevent poisonous, corrosivity or powder and granule shape material from leaking out and flying upward.Due to eliminating cleaner, system Cost is reduced;The technique of system is simpler, and with other continuous weighting equipment ratios, movable member is few, convenient processing and manufacture, safeguards letter It is single.
" field calibration concrete penetrometer ";Zheng Limin, China's metering, 2007, (10), page 71 describes electric contact pressure Power table is automatically controlled on concrete penetrometer for showing test pressure value and pressure bound, so electric contact pressure The indicating value of table is accurately the main metering performance index of permeameter.Conventional methods are from concrete penetrometer electro connecting pressure gauge On pull down, censorship in 6 months is once.And dismount in real work it is difficult, and disassembly process be easily damaged pressure gauge, copper pipe and Connector.To solve this problem, as long as installing a crossover sub additional.Electro connecting pressure gauge can be carried out scene without dismounting Calibration.One end of crossover sub is that M16 external screw threads are connected with the water-filling nozzle on permeameter pressure vessel, and the other end is M20 × 1.5 0.4 grade of precision pressure gauge of internal thread and (or one snap joint of middle adjunction) is connected, it is achieved thereby that master gauge and electricity Contact pressure table is connected on same pressure source.Field calibration operating procedure:One is to close die trial control valve and No. 0 control valve Door, two are switched on, startup power supply switch, make pump working, open die trial control valve and No. 0 control valve discharges air, directly To bubble-free;Hydraulic pressure on pipeline rises, electro connecting pressure gauge and master gauge pressure rise therewith, and three is reference JJG52-1999《General Manometer of Elastic Tube, pressure vacuum meter and vacuum meter》Vertification regulation enters to the pressure indicating value of permeameter Row calibration.
However, as described above, in the metering device of the Concrete liquid of above-mentioned prior art, measuring accuracy It is not high, or in order to realize high measuring accuracy, apparatus structure and method of operating are excessively complicated, cause metering device cost mistake It is high.Need at present a kind of to realize well balanced and long service life concrete matched between high measuring accuracy and installation cost The metering device of system liquid.
The content of the invention
To solve the above-mentioned problems in the prior art, on the base material of prior art, the present inventor is through deeply grinding Study carefully and many experiments, it is proposed that following technical scheme:
In one aspect of the invention, there is provided a kind of three-level quick metering device for liquid, including charging aperture, material Case, measuring tank, feed pipe, discharge nozzle, check-valves, scale, liquid-level switch, weight induction device, distance-sensor, power transmission shaft, liquid Depressor, piston, motor, control module is recessed inverted cone characterized in that, the charging aperture is arranged at the upper end of body feed tank Shape;It is provided with feed pipe between body feed tank and measuring tank to be connected, the feed pipe is provided with check-valves;Measuring tank and body feed tank phase One end of connection is additionally provided with discharging opening, and the discharging opening is equipped with discharge nozzle, check-valves is provided with discharge nozzle, in check-valves Lower section is provided with bearing material pallet;It is additionally provided with arm on the discharge nozzle to be conducted with feed pipe;The measuring tank other end is equipped with transmission Axle, the upper end (i.e. left end) of power transmission shaft is connected with piston, and lower end (i.e. right-hand member) is connected with motor, power transmission shaft upper end be additionally provided with away from From inductor, the surface of power transmission shaft is provided with scale;Hydraulic press one end is connected with motor, the other end and control module phase Even.
Preferably, the arm that the feed pipe is connected with discharge nozzle is shunt pipe, and liquid-level switch is additionally provided with thereon.It is described Feed pipe and the form that discharge nozzle can be feed hose and discharge tube, for example, can pump flexible pipe for conventional liq.
Preferably, the measuring tank lower section is provided with weight induction device, and weight induction device is connected with control module.
In a preferred embodiment, the control module is based on the control module of ARM.The control module is to sensing The analog quantity of device carries out data acquisition and processing (DAP), and analog quantity is changed into the voltage of 0-3.3V through transmitter, then is changed by A/D Device is changed into data signal, is sent to display, if it find that having differences with setting value for check-valves flow, then send out to check-valves Go out voltage signal, adjust check-valves flow, for example, change the voltage of check-valves, so as to effectively play alignment purpose.The setting Value can be input into by the metric results manually according to scale.The control module can include that A/D sampling modules, LED show Show module, D/A output modules, pid control algorithm module and velocity pulse module.By the design form so that with it is existing Control module is compared, and the intelligence degree of control module is higher, more compact structure and control accuracy is higher.
In the metering device of the present invention, keep in sealing contact between piston and measuring tank, in the piston and measuring tank Contact portion be preferably applied with the abrasive sealing materials layer of sealing ring form.The thickness of abrasive sealing materials layer is preferably 0.1- 3mm, preferred 0.2-0.8mm.
The abrasive sealing materials are preferably modified teflon material (PTFE), and the modified teflon material is glass The combined modified polytetrafluoroethylmaterial material of glass fiber, Nano carbon fibers peacekeeping polysiloxanes, based on modified teflon material Gross weight meter, comprising glass fibre 2.0-3.0wt.%, carbon nano-fiber 1.5-2.0wt.% and polysiloxanes 3.5- 5.5wt.%.
The inventors discovered that, during the use of meter, with the increase of use time, piston can wear and tear, It is poorly sealed so as to cause, seriously cause the accuracy of test result, need Jing often to change, cause cost to increase.Through deeply Research finds that, by being used in combination for glass fibre, nano material and polymer, the performance for making abrasive sealing materials is obtained greatly Improve.So that front and rear baffle piston apparatus have the advantages that wear-resistant, long service life.Glass fibre, carbon nano-fiber plus Enter so that form Mesh nodes in PTFE layer structures, so as to improve rigidity, thermal conductivity, creep resistance and wearability, make close The envelope life-span greatly prolongs, and finds in process of the test, and 2wt.% glass fibres, the Nano carbon fibers peacekeeping of 2wt.% are added in PTFE 3.5wt.% polysiloxanes, the wearability for alloing piston is improved much compared to described filler is added without, for example, improve 320 Times, improve more than 280 times than General Purpose Rubber sealing ring.The present invention it was unexpectedly found that, iff adding the material (glass Glass fiber and carbon nano-fiber), then the hardness that can make material increases, and elasticity is reduced, and pliability is deteriorated, through numerous studies, this Inventor introduces polysiloxanes in abrasive sealing materials, rubbing surface lubrication is helped, so as to extend the service life of piston.It is described Polysiloxanes is preferably branched polysiloxanes, more preferably epoxide modified branched polysiloxane.The branched polysiloxane can By the siloxanes with Si -- H bond for representing formula (a), to react with the asymmetric linear siloxane that formula (b) is represented It is prepared by row:
Wherein n represents the integer of 12-28,
Wherein X represents any halogen, and m represents 2 or 3 integer,
Reaction condition can include:In organic solvent by (a) and (b) the two mixing, it is stirred overnight in a nitrogen atmosphere, The mixing can be using dropwise addition mode, being such as added drop-wise to formula (a) expression by the asymmetric linear siloxane that formula (b) is represented In siloxanes with Si -- H bond.
The method that abrasive sealing materials can pass through to comprise the steps is obtained:Polytetrafluoroethylene (PTFE) material and glass fibre are entered Row high shear mixing, obtains mixture A, then by the mixing of Nano carbon fibers peacekeeping polysiloxanes, mixture B is obtained, then by mixture A Mixed, suppressed, being sintered with B and machining.Banding can be processed into, in order to be applied on piston.By upper State order by merging, it is possible to achieve the uniform mixing of each component, it is to avoid when all components mix simultaneously, glass fibre and nanometer The agglomeration due to entanglement between material such as carbon nano-fiber.
The abrasive sealing materials can be applied to the outer rim of piston by the conventional method in this area, and methods described is for example hot Adhesive is closed or used in clinkering.
Preferably, lubricant layer is included between the abrasive sealing materials and measuring tank.The lubricant is preferably comprised:Base The solvable titanium complex of plinth oil and oil, wherein base oil content are 60-95%, and the content of the solvable titanium complex of oil is 1- 10%.Certainly, the lubricant can also be containing other common additives, such as antiwear additive, antioxidant, extreme pressure agent etc., these The content range of common additives is also well known to those skilled in the art and is easy to what is determined.Most preferably, the titanium is matched somebody with somebody Compound is not halogen-containing.It is highly preferred that its chemical structural formula can be:
R1、R2、R3And R4Ethyoxyl or propoxyl group can independently be, condition is R1、R2、R3And R4At least one of be C6-C18The anion of saturated carboxylic acid.
By the use of lubricant of the present invention, frictional force can be substantially reduced while piston seal performance is not reduced.
Because liquid usually contains various additives, the inner surface of the feed pipe, discharge nozzle, arm and measuring tank is easy to Corrode, thus it is preferably wear-resisting, corrosion-resistant in one layer of the inner surface coating of the feed pipe, discharge nozzle, arm and measuring tank Material, forms wear-resisting, corrosion-resistant finishes.
Wear-resisting, corrosion-resistant finishes the main component and its percentage composition proportioning are:Al2O3Powder 20%-30%, MnO2Powder 10%-30%, TiO2Powder 10%-15%, SiO2Powder 2%-4%, 30%-50% carbon fiber.The coating can It is prepared using plasma thermal sprayed technique, the thickness after its shaping is about 20-40 μm.Wear-resisting, corrosion-resistant finishes is imparted Metering device good wear-resisting, corrosion resisting property, effectively increase service life, and it is certain that the addition of carbon fiber also gives the coating Toughness.
In another aspect of this invention, the method for additionally providing a kind of aforementioned above-mentioned metering device of operation, the method includes By the opening and closing of control module two check-valves of control.
More specifically, control module is measured by the liquid communication speed and opening time that calculate check-valves, distance Range ability of the inductor by induction piston in measuring tank is measured, and scale is measured by artificial reading, by mark The metric results of chi adjust the distance inductor and control module is modified, and the metric results by distance-sensor and control The metric results contrast of module judges the working condition of check-valves.
Main advantages of the present invention are the three-level metering mould for employing chip controls, scale monitoring and inductor cooperation Formula, metered rate is fast, due to the use of transmission device, generally within a short period of time just can with the metering of the liquid of large volume, High precision and low cost, simultaneously because wear-resisting, anti-corrosion layer applying and the selection of encapsulant, metering device use reliability, Service life is greatly improved.Especially it should be mentioned that the metering device measuring accuracy of the present invention is high, metered rate is fast, and error is little In 5/1000ths.
Description of the drawings
Accompanying drawing 1 is the structural representation of the quick metering device of the present invention;
In figure, 1 is body feed tank;2 is measuring tank;3 is motor;4 is arm;5 is control module;6 is hydraulic press;7 be away from From inductor;8 is weight inductor;9 is power transmission shaft;10 is feed pipe;11 is check-valves;12 is discharge nozzle;13 is bearing material support Disk;14 is piston.
Specific embodiment:
Embodiment 1
Below in conjunction with the accompanying drawings the invention will be further described.
A kind of three-level quick metering device for liquid of the present invention, including charging aperture, body feed tank 1, measuring tank 2, charging Pipe 10, discharge nozzle 12, check-valves 11, scale, liquid-level switch, weight induction device 8, distance-sensor 7, power transmission shaft 9, hydraulic press 6, Motor 3, control module 5, the charging aperture is arranged at the upper end of body feed tank, is recessed turbination;Body feed tank 1 and measuring tank It is provided with feed pipe between 2 to be connected, the feed pipe is provided with check-valves;One end that measuring tank 2 is connected with body feed tank 1 also sets There is discharging opening, the discharging opening is equipped with discharge nozzle, and check-valves is provided with discharge nozzle, and bearing material support is provided with below check-valves Disk;It is additionally provided with arm on the discharge nozzle to be conducted with feed pipe;The other end of measuring tank 2 is equipped with power transmission shaft 9, power transmission shaft 9 Upper end is connected with piston 14, and lower end is connected with motor, and in power transmission shaft upper end distance-sensor 7 is additionally provided with, and the surface of power transmission shaft 9 sets There is scale;The one end of hydraulic press 6 is connected with motor, and the other end is connected with control module.Described feed pipe and discharge nozzle The arm of connection is shunt pipe, and liquid-level switch is additionally provided with thereon.The described lower section of measuring tank 2 is provided with weight induction device 8, weight Amount inductor 8 is connected with control module 5.Described control module 5 is based on the control module of ARM.Feed pipe, discharge nozzle, The inner surface of arm and measuring tank coats one layer of wear-resisting, resistant material, forms wear-resisting, corrosion-resistant finishes, the wear-resisting, corrosion resistant The main component and its percentage composition proportioning of erosion resisting coating is (gross weight meter based on material):Al2O3Powder 20%, MnO2Powder 20%th, TiO2Powder 10%, SiO2Powder 4%, 46% carbon fiber, the coating is applied using plasma thermal sprayed technique, Thickness after its shaping is 20 μm.By the metering device based on there is the aqueous solution of corrosive naphthalene water reducer to steel Amount, the main component of the naphthalene water reducer is naphthalenesulfonic acid-formaldehyde condensate (content > 96wt.%).After 6h, take out Feed pipe, by carrying out polarization curve test to its inner surface its corrosion condition is observed.
Comparative example 1
Comparative example 1 does not have with the inner surface for differing only in the feed pipe, discharge nozzle, arm and measuring tank of embodiment 1 There is the wear-resisting, etch resistant material layer of applying.The metering device is used for have the aqueous solution of corrosive naphthalene water reducer to steel Metering, the main component of the naphthalene water reducer is naphthalenesulfonic acid-formaldehyde condensate (content > 96wt.%).After using 6h, take Go out feed pipe, by carrying out polarization curve test to its inner surface its corrosion condition is observed.
Found by the polarization curve test and comparison of embodiment 1 and comparative example 1, in embodiment 1, electricity is corroded before and after use Stream has almost no change, and in comparative example 1, using post-etching electric current 1.5% is increased, and shows that the feed pipe in comparative example exists Corrosion is subject in use.
The metering device of the present invention is due to wear-resisting, anti-corrosion layer applying, and working life is longer;Simultaneously good airproof performance, makes Accurate measurement is obtained, and the metering of multiple material can be applied to;The use of special lubricant, makes metered rate faster;Additionally, By control module, implement three-level metering linkage and real time calibration, measuring accuracy is further improved.These effects are this area skills Art personnel institute is unforeseeable.
This written description discloses the present invention, including optimal mode using example, and also enables those skilled in the art Manufacture and using the present invention.The present invention can patentable scope be defined by the claims, and this area skill can be included Other examples that art personnel expect.If this other examples have the structural elements of literal language not different from claims Element, or if this other examples include equivalent structure element of the literal language without substantial differences with claims, Then this other examples are intended within the scope of claims.In the case where inconsistent degree is not resulted in, by reference to The all references part of reference herein is incorporated herein.

Claims (8)

1. a kind of metering device for liquid, including charging aperture, body feed tank, measuring tank, feed pipe, discharge nozzle, check-valves, mark Chi, liquid-level switch, weight induction device, distance-sensor, power transmission shaft, hydraulic press, piston, motor, control module, its feature exists In the charging aperture is arranged at the upper end of body feed tank, is recessed turbination;Feed pipe is provided between body feed tank and measuring tank It is connected, the feed pipe is provided with check-valves;One end that measuring tank is connected with body feed tank is additionally provided with discharging opening, the discharging Mouth is equipped with discharge nozzle, and check-valves is provided with discharge nozzle, and bearing material pallet is provided with below check-valves;On the discharge nozzle also It is provided with arm to be conducted with feed pipe;The measuring tank other end is equipped with power transmission shaft, and the upper end of power transmission shaft is connected with piston, lower end with Motor is connected, and in power transmission shaft upper end distance-sensor is additionally provided with, and the surface of power transmission shaft is provided with scale;Hydraulic press one end and driving electricity Machine is connected, and the other end is connected with control module;
The control module be based on the control module of ARM, the control module analog quantity of inductor is carried out data acquisition and Process, analog quantity is changed into into the voltage of 0-3.3V through transmitter, then data signal is changed into from A/D converter, be sent to aobvious Show device, if it find that having differences with setting value for check-valves flow, then send voltage signal to check-valves, adjust check-valves stream Amount, so as to effectively play alignment purpose, the setting value is input into by the metric results manually according to scale, the control mould Block includes A/D sampling modules, LED display module, D/A output modules, pid control algorithm module and velocity pulse module;
Keep in sealing contact between the piston and measuring tank, in the contact portion of the piston and measuring tank sealing ring is applied with The abrasive sealing materials layer of form, the thickness of abrasive sealing materials layer is 0.1-3mm, and the abrasive sealing materials are modified polytetrafluoro Vinyl material, the modified teflon material is glass fibre, the polytetrafluoro that Nano carbon fibers peacekeeping polysiloxanes is combined modified Vinyl material, based on the gross weight meter of modified teflon material, comprising glass fibre 2.0-3.0wt.%, carbon nano-fiber 1.5-2.0wt.% and polysiloxanes 3.5-5.5wt.%;
The feed pipe, discharge nozzle, arm and measuring tank inner surface coat one layer of wear-resisting, resistant material, formed it is wear-resisting, Corrosion-resistant finishes, wear-resisting, corrosion-resistant finishes the main component and its percentage composition proportioning are:Al2O3Powder 20%-30%, MnO2Powder 10%-30%, TiO2Powder 10%-15%, SiO2Powder 2%-4%, 30%-50% carbon fiber.
2. the metering device for liquid according to claim 1, it is characterised in that the feed pipe is connected with discharge nozzle Arm be shunt pipe, liquid-level switch is additionally provided with thereon.
3. the metering device for liquid according to claim 1 and 2, it is characterised in that install the measuring tank lower section There is weight induction device, weight induction device is connected with control module.
4. the metering device for liquid according to claim 1, wherein between the abrasive sealing materials and measuring tank Comprising lubricant layer.
5. the metering device for liquid according to claim 1, the feed pipe, discharge nozzle, arm and measuring tank Inner surface is coated with one layer of wear-resisting, resistant material, forms wear-resisting, corrosion-resistant finishes.
6. a kind of method that operational rights require the metering device described in 1 for liquid, the method is included by control module control The opening and closing of two check-valves.
7. the method for the metering device for liquid according to claim 6, wherein control module are by calculating the liquid of check-valves Body velocity of liquid assets and opening time are measured, and range ability of the distance-sensor by induction piston in measuring tank is counted Amount, scale is measured by artificial reading, adjusts the distance inductor by the metric results of scale and control module is modified, And the metric results contrast of the metric results and control module by distance-sensor judges the working condition of check-valves.
8. according to the method for the metering device for liquid of claim 6 or 7, wherein the coating profit on abrasive sealing materials layer Lubrication prescription.
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CN106754319A (en) * 2016-11-27 2017-05-31 中国人民解放军第四军医大学 A kind of device of multi-functional controllable cell drop amount
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