CN104614019A - Metering device for liquid - Google Patents
Metering device for liquid Download PDFInfo
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- CN104614019A CN104614019A CN201510041721.1A CN201510041721A CN104614019A CN 104614019 A CN104614019 A CN 104614019A CN 201510041721 A CN201510041721 A CN 201510041721A CN 104614019 A CN104614019 A CN 104614019A
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- 239000007788 liquid Substances 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims description 36
- 238000005260 corrosion Methods 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 11
- 239000003566 sealing material Substances 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 31
- 239000004568 cement Substances 0.000 description 19
- 238000000227 grinding Methods 0.000 description 17
- 239000004567 concrete Substances 0.000 description 15
- 239000011344 liquid material Substances 0.000 description 14
- 238000005303 weighing Methods 0.000 description 11
- -1 polysiloxane Polymers 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- 229920001296 polysiloxane Polymers 0.000 description 9
- 239000003365 glass fiber Substances 0.000 description 8
- 239000004566 building material Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000002134 carbon nanofiber Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
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- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000002199 base oil Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical group O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 239000007767 bonding agent Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 150000002118 epoxides Chemical class 0.000 description 1
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- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
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- 239000012299 nitrogen atmosphere Substances 0.000 description 1
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- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Reciprocating Pumps (AREA)
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
Technical field
The present invention relates to measuring apparatus apparatus field, specifically a kind of measuring apparatus for liquid, particularly a kind of three grades of accurate quick metering devices for liquid.
Technical background
Deepening continuously of China's urbanization significantly promotes the demand of the building materials such as cement, concrete, Stabilized Soil, mortar, sandstone.Going deep into along with novel Urbanization Construction at present, investing money in developing of future city economic circle is expected to accelerate, the economic circle of east Jing-jin-ji region, the Yangtze River Delta, these relative maturity of Pearl River Delta can be promoted further, and new motive force of growth can be accelerated to be formed in central and west regions, the demand of above-mentioned building materials will increase further.Statistics shows, and China's urbanization rate often promotes one percentage point, will have 1,000 ten thousand populations and transfer to city.According to everyone living space 30 square metres calculating, need increase the house of 300,000,000 square metres every year newly, if need 0.2 ton of cement to calculate according to every square metre of housing construction, urbanization rate often promotes one percentage point will pull cement demand 0.6 hundred million tons.In addition, the annual Committee of Development and Reform has also examined the construction projects such as some inter-city passenger rails, highway, airport and harbour.Along with project funds puts in place, these projects will go into operation successively, will become another key factor stimulating the building materials demands such as such as cement.In addition, from construction period and flow process, the construction of metro project generally needs 4-5, and therefore comprising the raw material supplies such as commerical ready-mixed concrete, cement, sandstone may increase in explosion type.
At present, substantially all liquid is needed in the preparation of building materials, such as water and multiple additive, the degree of accuracy of measuring for its composition directly has influence on the performance of building material product, even has decisive influence, but existing for building material product manufacture liquid metering device often precision is not high, cause the large heavy discount of the performance of the product obtained, or after the high-precision gel metering outfit of employing, although precision improves, but its equipment is often comparatively complicated, and cost is very high.Or existing liquid meter product is much only only applicable to the metering of water, not there is tolerance for mordant liquid such as additive solution (as liquid cement grinding additive).
CN101586983A discloses the measuring apparatus in a kind of concrete batch plant, specifically a kind of cement on-line metering device, described cement on-line metering device, comprise weighing hopper underframe and be installed on the weighing hopper on weighing hopper underframe top, it is characterized in that: worm conveyor suspension bracket is set in the upper side of weighing hopper underframe, tension scale weight sensor is set below worm conveyor suspension bracket; The feed end of worm conveyor is arranged on the middle part of weighing hopper underframe, and the discharge end of worm conveyor is connected to below tension scale sensor; Worm conveyor feed end and be positioned at below weighing hopper between discharging opening to have star discharge valve; Arrange at least 3 pressure and weighting transducers symmetrically at the top of weighing hopper underframe, described weighing hopper is fixed on described pressure and weighting transducers.
CN103419283A discloses a kind of continous way cement-weighting device, comprise metering screw, metering screw drives reductor, feed rotary valve, feed rotary valve drive motor, Industry Control computer, feed rotary valve frequency converter, weight sensor, be characterized in: be connected for pull-type weight sensor and metering screw hang to draw, Industry Control computer is electrically connected with PC application, the input signal end of PC application is electrically connected with pull-type weight sensor by weight transmitter, the input signal end of PC application is electrically connected with the scrambler being placed in metering screw axle head, the output signal end of PC application is connected with metering screw by metering screw frequency converter, the output signal end of PC application successively with feed rotary valve frequency converter, feed rotary valve drive motor is electrically connected.
CN103157544A discloses a kind of adding liquid cement grinding aid measuring apparatus, comprise cement grinding aid storage tank, liquid material volume pump, liquid material balance tank and liquid material balance pipe, the bottom of cement grinding aid storage tank is communicated with the bottom of liquid material balance tank by the first connecting pipe, the bottom of liquid material balance tank is communicated with the side of liquid material volume pump by the second connecting pipe, the opposite side of volume pump is provided with discharge nozzle, one end of liquid material balance pipe is connected to the top of cement grinding aid storage tank, the other end of liquid material balance pipe is connected to the top of liquid material balance tank, the present invention by increasing a liquid material balance tank between cement grinding aid storage tank and liquid material volume pump, a liquid material balance pipe is set between cement grinding aid storage tank and liquid material balance tank, make the material entering liquid material volume pump obtain a balanced thing pressure, what ensure to join grinding aid in grinding machine measures equilibrium.
CN202836632U discloses a kind of cement grinding aid automatic metering system, it comprises grinding aid volume pump, grinding aid hold-up vessel, flowmeter, cement mill, DCS system switch board and host computer, the exit of described grinding aid hold-up vessel is provided with described grinding aid volume pump, the outlet of described grinding aid hold-up vessel is connected by pipeline with the entrance of described grinding aid volume pump, described grinding aid metering delivery side of pump is connected by pipeline with the entrance of described cement mill, and the pipeline connecting the entrance of described metering delivery side of pump and described cement mill is provided with described flowmeter.
CN102310484A discloses a kind of drawing-type metering device, proportioning station and concrete mixing plant, it is drawing-type metering device, comprise pulling type sensor and be arranged on the weighing hopper below pulling type sensor, and connect the flexible connecting device of pulling type sensor and weighing hopper.According to proportioning station of the present invention, be provided with above-mentioned drawing-type metering device.According to concrete mixing plant of the present invention, be provided with above-mentioned proportioning station or drawing-type metering device.
EP1405705A1 discloses a kind of measuring apparatus of concrete material, it is characterized in that, it has following parts: the aggregate feeding mechanism of supply aggregate; Water supply installation; Accommodate and measure above-mentioned aggregate feeding mechanism supply the aggregate measuring bin of aggregate; Measuring tank, water logging aggregate that this measuring tank mixes for the water of accommodating the aggregate supplied by above-mentioned aggregate feeding mechanism and above-mentioned water supply installation and supplying, and be equipped with can free switch, and bottom opening can be made to keep the bottom of watertightness; Measure the water logging aggregate weigh measuring device of the weight of the water logging aggregate in above-mentioned measuring tank; Measure the water level measuring device of the water level of the water logging aggregate in above-mentioned measuring tank; And water level holding device, this water level holding device remains on required water level to make the water level of the water logging aggregate in above-mentioned measuring tank, will exceed water sucking-off from above-mentioned measuring tank of this required water level, and measure above-mentioned water absorbing capacity; Above-mentioned water level holding device is made up of following each several part: be arranged to the suction hose that can freely be elevated; Be connected with above-mentioned suction hose and be communicated with and connect, for the water suction metering accumulator tank of the water yield that the First Astronautic Research Institute for Measurement and Test sucks; And be connected and the getter device be communicated with accumulator tank with this water suction metering; Further, above-mentioned aggregate feeding mechanism is made above-mentioned aggregate can be supplied to above-mentioned aggregate measuring bin and above-mentioned measuring tank respectively.
US2007163333A1 discloses a kind of measuring apparatus of concrete material, it is characterized by: the measuring apparatus of described concrete material is made up of aggregate feeder hopper, measuring tank, liquid level emasuring device, apparatus for measuring quality; Wherein, aggregate feeder hopper provides aggregate; Measuring tank holds the water logging aggregate of aggregate and the water formation come from this aggregate feeder hopper; Liquid level emasuring device is arranged on above this measuring tank, measures the liquid level of the described water logging aggregate be contained in described measuring tank; Apparatus for measuring quality measurement is contained in the quality of the described water logging aggregate in described measuring tank.
WO02060665A1 discloses a kind of measuring apparatus of concrete material, it is characterized by: the measuring apparatus of described concrete material is made up of aggregate feeder hopper, measuring tank, liquid level emasuring device, apparatus for measuring quality; Wherein, aggregate feeder hopper provides aggregate; Measuring tank holds the water logging aggregate of aggregate and the water formation come from this aggregate feeder hopper; Liquid level emasuring device is arranged on above this measuring tank, measures the liquid level of the described water logging aggregate be contained in described measuring tank; Apparatus for measuring quality measurement is contained in the quality of the described water logging aggregate in described measuring tank.
" application of Subtraction method measuring apparatus in manufacture of cement ", Wang Chuandong, Chinese building material magazine, 1st phase in 1989, disclose a kind of Subtraction method measuring apparatus, its by control section (single-chip microcomputer, analogue instrument) ceaselessly calculate each the time interval-cycle in, the minimizing of feed bin weight realizes.Be characterized in that measuring accuracy is high, its feed bin weighting manner belongs to static weighing in essence, and it is not by the impact of the factors such as zero point drift, and thus measuring accuracy is higher than dynamic metering devices such as belted electronic balance, helix balance, impulse flowmeters; Adapt to weight range large, the metering of the especially big or special small powder that general continuous scale has been difficult to, it can complete.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 wide.Subtraction method measuring apparatus input and output material part adopts and is flexible coupling, and adopts storehouse formula structure and the different discharging topworks of adapted, is thus applicable to powdery, granular material, is also applicable to thickness or thin liquid; The charging/discharging device of system all adopts hermetically sealed mode, poisonous, corrosivity or powder and granule shape material can be prevented to external leakage and fly upward.Owing to eliminating cleaner, the cost of system reduces; The technique of system is comparatively simple, and with other continuous weighting equipment ratio, movable member is few, convenient processing and manufacture, safeguards simple.
" field calibration concrete penetrometer "; Zheng Limin, China's metering, 2007, (10), 71st page describes electro connecting pressure gauge on concrete penetrometer, is used to show that test pressure value and pressure bound control automatically, so the indicating value of the electro connecting pressure gauge metering performance index that to be accurately permeameter main.Conventional methods is that electro connecting pressure gauge is pulled down from concrete penetrometer, and censorship in 6 months once.And dismounting is difficult in real work, and disassembly process easily damages tensimeter, copper pipe and web member.For addressing this problem, as long as install an X-over additional.Electro connecting pressure gauge just can carry out field calibration without dismounting.One end of X-over is that M16 external thread is connected with the water-filling nozzle on permeameter pressure vessel, the other end is M20 × 1.5 internal thread and (or middle adjunction rapid-acting coupling) 0.4 grade of precision pressure list catenation, thus achieves master gauge and electro connecting pressure gauge is connected on same pressure source.Field calibration operation steps: one is close die trial by-pass valve control and No. 0 by-pass valve control, two is energising, startup power switch, makes pump working, opens die trial by-pass valve control and No. 0 by-pass valve control discharge air, till bubble-free; Hydraulic pressure on pipeline rises, and electro connecting pressure gauge and normal pressure gauge pressure raise thereupon, and three is calibrate with reference to the pressure indicating value of JJG52-1999 " General Manometer of Elastic Tube, pressure vacuum meter and vacuum meter " vertification regulation to permeameter.
But as described above, in the measuring apparatus of the Concrete liquid of above-mentioned prior art, measuring accuracy is not high, or in order to realize high measuring accuracy, apparatus structure and method of operating are too complicated, cause measuring apparatus high cost.Current needs are a kind of can realize measuring apparatus that is well balanced between high measuring accuracy and installation cost and the Concrete liquid of long service life.
Summary of the invention
For solving the above-mentioned problems in the prior art, on the base material of prior art, the present inventor, through further investigation and great many of experiments, proposes following technical scheme:
In one aspect of the invention, provide a kind of three grades of quick metering devices for liquid, comprise charging aperture, body feed tank, test tank, feed pipe, discharge nozzle, non-return valve, scale, level switch, weight induction device, distance-sensor, transmission shaft, hydraulic press, piston, motor, control module is characterized in that, described charging aperture is arranged at the upper end of body feed tank, is recessed turbination; Be provided with feed pipe between body feed tank with test tank to be connected, described feed pipe is provided with non-return valve; One end that test tank is connected with body feed tank is also provided with discharging opening, and described discharging opening is equipped with discharge nozzle, and discharge nozzle is provided with non-return valve, is provided with bearing material pallet below non-return valve; Described discharge nozzle is also provided with arm and feed pipe is conducted; The test tank other end is equipped with transmission shaft, and the upper end (i.e. left end) of transmission shaft is connected with piston, and lower end (i.e. right-hand member) is connected with motor, is also provided with distance-sensor in transmission shaft upper end, and the surface of transmission shaft is provided with scale; Hydraulic press one end is connected with drive motor, and the other end is connected with control module.
Preferably, the arm that described feed pipe is communicated with discharge nozzle is shunt pipe, and it is also provided with level switch.Described feed pipe and discharge nozzle can be the form of feed hose and discharge tube, such as, can be conventional liq pumping flexible pipe.
Preferably, be provided with weight induction device below described test tank, weight induction device is connected with control module.
In a preferred embodiment, described control module is the control module based on ARM.This control module carries out data acquisition and processing (DAP) to the analog quantity of inductor, through transmitter, analog quantity is changed into the voltage of 0-3.3V, digital signal is become again from A/D converter, send to display, if find there are differences with setting value of non-return valve flow, then send voltage signal to non-return valve, adjustment non-return valve flow, such as change the voltage of non-return valve, thus effectively play alignment purpose.Described setting value can be inputted by the artificial metric results according to scale.Described control module can comprise A/D sampling module, LED display module, D/A output module, pid control algorithm module and velocity pulse module.By this design form, make compared with existing control module, the intelligence degree of control module is higher, more compact structure and control accuracy is higher.
In measuring apparatus of the present invention, keep sealing to contact between piston with test tank, be preferably applied with the abrasive sealing materials layer of O-ring seal form in the contact portion of described piston and test tank.The thickness of abrasive sealing materials layer is preferably 0.1-3mm, preferred 0.2-0.8mm.
This abrasive sealing materials is preferably modified teflon material (PTFE), this modified teflon material is the combined modified polytetrafluoroethylmaterial material of glass fibre, Nano carbon fibers peacekeeping polysiloxane, based on the total weight of modified teflon material, comprise glass fibre 2.0-3.0wt.%, carbon nano-fiber 1.5-2.0wt.% and polysiloxane 3.5-5.5wt.%.
The present inventor finds, in the use procedure of meter, along with the increase of service time, piston can wear and tear, thus causes poorly sealed, seriously causes the accuracy of test result, needs often to change, causes cost to increase.Find through further investigation, by the conbined usage of glass fibre, nano material and polymkeric substance, the performance of abrasive sealing materials is greatly improved.Front and rear baffle piston apparatus is made to have advantage that is wear-resistant, long service life.Adding of glass fibre, carbon nano-fiber makes to form Mesh nodes in PTFE layer structure, thus improve rigidity, thermal conductivity, creep resistance and wearing quality, sealing life is extended greatly, find in process of the test, the Nano carbon fibers peacekeeping 3.5wt.% polysiloxane of 2wt.% glass fibre, 2wt.% is added in PTFE, make the wearing quality of piston and can improve a lot compared to not adding described filler, such as, improve 320 times, improve more than 280 times than General Purpose Rubber O-ring seal.The present invention finds unexpectedly, iff adding described material (glass fibre and carbon nano-fiber), the hardness of material then can be made to increase, elasticity reduces, pliability is deteriorated, and through large quantity research, the present inventor introduces polysiloxane in abrasive sealing materials, help rubbing surface lubricates, thus extends the serviceable life of piston.Described polysiloxane is preferably the polysiloxane of branching, is more preferably epoxide modified branched polysiloxane.Described branched polysiloxane can by the siloxane with Si-H key making formula (a) represent, the asymmetric linear siloxane represented with formula (b) reacts to be prepared:
Wherein n represents the integer of 12-28,
Wherein X represents any halogen, and m represents the integer of 2 or 3,
Reaction conditions can comprise: in organic solvent by (a) and (b) the two mixing, stir in a nitrogen atmosphere and spend the night, described mixing can adopt dropping mode, and what the asymmetric linear siloxane such as formula (b) represented was added drop-wise to that formula (a) represents has in the siloxane of Si-H key.
Abrasive sealing materials can be obtained by the method comprised the steps: teflon material and glass fibre are carried out high shear mixing, obtain potpourri A, again Nano carbon fibers peacekeeping polysiloxane is mixed, obtain potpourri B, then potpourri A and B is carried out mixing, suppress, sinter and cut.Band shape can be processed into, so that be applied on piston.By above-mentioned order by merging, can realize the Homogeneous phase mixing of each component, avoid when all components mixes simultaneously, glass fibre and nano material are as the agglomeration due to entanglement between carbon nano-fiber.
Described abrasive sealing materials is applied to the outer rim of piston by the method for this area routine, and described method such as hot melt combines or uses bonding agent.
Preferably, lubricant layer is comprised between described abrasive sealing materials and test tank.Described lubricant preferably comprises: base oil and the solvable titanium complex of oil, and wherein base oil content is 60-95%, and the content of the titanium complex that oil is solvable is 1-10%.Certainly, this lubricant can also contain other common additives, such as antiwear agent, antioxidant, extreme pressure agent etc., and the content range of these common additives is also known by those skilled in the art and is easy to determine.Most preferably, described titanium complex is not halogen-containing.More preferably, its chemical structural formula can be:
R
1, R
2, R
3and R
4can be ethoxy or propoxyl group independently, condition be R
1, R
2, R
3and R
4in at least one be C
6-C
18the negative ion of saturated carboxylic acid.
By the use of lubricant of the present invention, while not reducing piston seal performance, greatly friction force can be reduced.
Because liquid is usually containing multiple additive, the inside surface of described feed pipe, discharge nozzle, arm and test tank is easy to corrode, therefore the preferred inside surface at described feed pipe, discharge nozzle, arm and test tank applies that one deck is wear-resisting, resistant material, forms wear-resisting, corrosion-resistant finishes.
Principal ingredient and the percentage composition proportioning thereof of described wear-resisting, corrosion-resistant finishes are: Al
2o
3powder 20%-30%, MnO
2powder 10%-30%, TiO
2powder 10%-15%, SiO
2powder 2%-4%, 30%-50% carbon fiber.Described coating can adopt plasma thermal sprayed technique to be prepared, and the thickness after it is shaping is about 20-40 μm.Wear-resisting, corrosion-resistant finishes imparts measuring apparatus good wear-resisting, corrosion resisting property, effectively improves serviceable life, and adding of carbon fiber also gives this coating certain toughness.
In another aspect of this invention, additionally provide a kind of method operating aforementioned above-mentioned measuring apparatus, the method comprises the opening and closing being controlled control two non-return valve by control module.
More specifically, control module is measured by the liquid communication speed and opening time calculating non-return valve, distance-sensor is measured by the range ability of induction piston at test tank, scale is measured by artificial reading, revised by adjust the distance inductor and control module of the metric results of scale, and judge the working condition of non-return valve by the metric results of distance-sensor and the metric results contrast of control module.
Major advantage of the present invention is to have employed chip controls, scale is monitored and three grades of quantitative models of inductor cooperation, metered rate is fast, due to the use of gearing, usual within a short period of time just can the metering of liquid of large volume, precision is high and cost is low, simultaneously due to wear-resisting, the applying of anti-corrosion layer and the selection of encapsulant, measuring apparatus uses reliable, serviceable life greatly to improve.Especially should it is mentioned that, measuring apparatus measuring accuracy of the present invention is high, and metered rate is fast, and error is less than 5/1000ths.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of quick metering device of the present invention;
In figure, 1 is body feed tank; 2 is test tank; 3 is motor; 4 is arm; 5 is control module; 6 is hydraulic press; 7 is distance-sensor; 8 is weight inductor; 9 is transmission shaft; 10 is feed pipe; 11 is non-return valve; 12 is discharge nozzle; 13 is bearing material pallet; 14 is piston.
Embodiment:
Embodiment 1
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of three grades of quick metering devices for liquid of the present invention, comprise charging aperture, body feed tank 1, test tank 2, feed pipe 10, discharge nozzle 12, non-return valve 11, scale, level switch, weight induction device 8, distance-sensor 7, transmission shaft 9, hydraulic press 6, motor 3, control module 5, described charging aperture is arranged at the upper end of body feed tank, is recessed turbination; Be provided with feed pipe between body feed tank 1 with test tank 2 to be connected, described feed pipe is provided with non-return valve; One end that test tank 2 is connected with body feed tank 1 is also provided with discharging opening, and described discharging opening is equipped with discharge nozzle, and discharge nozzle is provided with non-return valve, is provided with bearing material pallet below non-return valve; Described discharge nozzle is also provided with arm and feed pipe is conducted; Test tank 2 other end is equipped with transmission shaft 9, and the upper end of transmission shaft 9 is connected with piston 14, and lower end is connected with motor, is also provided with distance-sensor 7 in transmission shaft upper end, and the surface of transmission shaft 9 is provided with scale; Hydraulic press 6 one end is connected with drive motor, and the other end is connected with control module.The arm that described feed pipe is communicated with discharge nozzle is shunt pipe, and it is also provided with level switch.Be provided with weight induction device 8 below described test tank 2, weight induction device 8 is connected with control module 5.Described control module 5 is the control module based on ARM.The inside surface of feed pipe, discharge nozzle, arm and test tank applies that one deck is wear-resisting, resistant material, form wear-resisting, corrosion-resistant finishes, principal ingredient and the percentage composition proportioning thereof of described wear-resisting, corrosion-resistant finishes are (total weight based on material): Al
2o
3powder 20%, MnO
2powder 20%, TiO
2powder 10%, SiO
2powder 4%, 46% carbon fiber, described coating adopts plasma thermal sprayed technique to apply, and the thickness after it is shaping is 20 μm.This measuring apparatus is used for the metering of aqueous solution steel to corrosive naphthalene water reducer, the principal ingredient of described naphthalene water reducer is naphthalenesulfonic acid-formaldehyde condensate (content > 96wt.%).After using 6h, take out feed pipe, observe its corrosion condition by carrying out polarization curve test to its inside surface.
Comparative example 1
With the difference of embodiment 1, comparative example 1 is only that the inside surface of described feed pipe, discharge nozzle, arm and test tank does not apply wear-resisting, etch resistant material layer.This measuring apparatus is used for the metering of aqueous solution steel to corrosive naphthalene water reducer, the principal ingredient of described naphthalene water reducer is naphthalenesulfonic acid-formaldehyde condensate (content > 96wt.%).After using 6h, take out feed pipe, observe its corrosion condition by carrying out polarization curve test to its inside surface.
Found by the polarization curve test and comparison of embodiment 1 and comparative example 1, in embodiment 1, before and after using, corrosion current has almost no change, and in comparative example 1, use post-etching electric current to add 1.5%, show that the feed pipe in comparative example is in use subject to corrosion.
Measuring apparatus of the present invention is due to applying that is wear-resisting, anti-corrosion layer, and mission life is longer; Good airproof performance, makes accurate measurement, and can be applicable to the metering of multiple material simultaneously; The use of special lubricant, makes metered rate faster; In addition, by control module, implement three grades of metering interlocks and real time calibration, measuring accuracy improves further.These effects are that those skilled in the art institute is unforeseeable.
The open the present invention of this written description use-case, comprises optimal mode, and also enables those skilled in the art manufacture and use the present invention.Of the present inventionly the scope of granted patent can be defined by the claims, and other example that those skilled in the art expect can be comprised.If other example this has the structural element of the literal language not differing from claims, if or other example this comprises and the equivalent structure element of the literal language of claims without substantial differences, then other example this is intended to be within the scope of claims.Can not cause under inconsistent degree, be incorporated herein by reference to by all references part of reference herein.
Claims (10)
1. for a measuring apparatus for liquid, comprise charging aperture, body feed tank, test tank, feed pipe, discharge nozzle, non-return valve, scale, level switch, weight induction device, distance-sensor, transmission shaft, hydraulic press, piston, motor, control module, it is characterized in that, described charging aperture is arranged at the upper end of body feed tank, is recessed turbination; Be provided with feed pipe between body feed tank with test tank to be connected, described feed pipe is provided with non-return valve; One end that test tank is connected with body feed tank is also provided with discharging opening, and described discharging opening is equipped with discharge nozzle, and discharge nozzle is provided with non-return valve, is provided with bearing material pallet below non-return valve; Described discharge nozzle is also provided with arm and feed pipe is conducted; The test tank other end is equipped with transmission shaft, and the upper end of transmission shaft is connected with piston, and lower end is connected with motor, is also provided with distance-sensor in transmission shaft upper end, and the surface of transmission shaft is provided with scale; Hydraulic press one end is connected with drive motor, and the other end is connected with control module.
2. the measuring apparatus for liquid according to claim 1, is characterized in that, the arm that described feed pipe is communicated with discharge nozzle is shunt pipe, and it is also provided with level switch.
3. the measuring apparatus for liquid according to claim 1 and 2, is characterized in that, is provided with weight induction device below described test tank, and weight induction device is connected with control module.
4. the measuring apparatus for liquid according to claim 1, is characterized in that, described control module is the control module based on ARM.
5. the measuring apparatus for liquid according to claim 1, is characterized in that keeping sealing to contact between piston with test tank, is applied with the abrasive sealing materials layer of O-ring seal form in the contact portion of described piston and test tank.
6. the measuring apparatus for liquid according to claim 5, comprises lubricant layer between wherein said abrasive sealing materials and test tank.
7. the measuring apparatus for liquid according to claim 1, the inside surface of described feed pipe, discharge nozzle, arm and test tank is coated with that one deck is wear-resisting, resistant material, forms wear-resisting, corrosion-resistant finishes.
8. operational rights requires the method for the measuring apparatus of liquid described in 1, and the method comprises the opening and closing being controlled two non-return valve by control module.
9. the method for the measuring apparatus for liquid according to claim 7, wherein control module is measured by the liquid communication speed and opening time calculating non-return valve, distance-sensor is measured by the range ability of induction piston at test tank, scale is measured by artificial reading, revised by adjust the distance inductor and control module of the metric results of scale, and judge the working condition of non-return valve by the metric results of distance-sensor and the metric results contrast of control module.
10. the method for the measuring apparatus for liquid of according to Claim 8 or 9, wherein applies lubricant on abrasive sealing materials layer.
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| CN104614019B (en) | 2017-05-10 |
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