CN104964809B - A kind of device and method for measuring filling slurry resistance of ducting loss parameter - Google Patents

A kind of device and method for measuring filling slurry resistance of ducting loss parameter Download PDF

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CN104964809B
CN104964809B CN201510418243.1A CN201510418243A CN104964809B CN 104964809 B CN104964809 B CN 104964809B CN 201510418243 A CN201510418243 A CN 201510418243A CN 104964809 B CN104964809 B CN 104964809B
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slurry
type pipe
agitating
resistance
loss parameter
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CN104964809A (en
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李向东
郑伯坤
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Changsha Institute of Mining Research Co Ltd
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Changsha Institute of Mining Research Co Ltd
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Abstract

A kind of device and method for measuring filling slurry resistance of ducting loss parameter, the device includes L-type pipe, agitating device, speed governing force (forcing) pump, electromagnetic flowmeter, mobile support saddle, delivery hose, agitating device and speed governing force (forcing) pump are fixed on mobile support saddle, agitating device is located at below the end of L-type pipe horizontal segment, the horizontal segment of L-type pipe is made of several short circuits, internal diameter all same everywhere in L-type pipe, the vertical section top of L-type pipe is equipped with feed hopper, feed hopper is equipped with limit line, one end of speed governing force (forcing) pump is connected to agitating device, the other end is connected to by delivery hose with feed hopper, electromagnetic flowmeter is mounted on delivery hose, the invention also includes a kind of methods for measuring filling slurry resistance of ducting loss parameter.The measurement accuracy of the present invention is compared with high, calculating is simple, floor space is small, the test period is short, testing expenses are low, materials are less.

Description

A kind of device and method for measuring filling slurry resistance of ducting loss parameter
Technical field
The present invention relates to a kind of assay methods and special equipment of drag losses parameter, especially a kind of for measuring filling The device and method of slurry resistance of ducting loss parameter.
Background technology
With the protrusion of the utilization of resources and environmental protection problem, to the discharge of mine solid waste, surface protection, resource reclaim The requirement of rate etc. increasingly improves, and filling in mine is used as the most important technological means that solves the above problems, at home and abroad mine It is used widely in field.Major requirement when filling in mine includes:(1)Low cost, up-to-standard filling are formed after filling Body;(2)Filling does not pollute subsurface environment;(3)Reduce underground filling dehydrating amount.When above-mentioned requirements mean filling in mine Need to improve the concentration of filling slurry as possible, but with and the problem come is raising with slurry concentration, pipeline resistance gesture Must be larger, measure various concentration, different materials match ratio, filling slurry different in flow rate resistance of ducting loss parameter, to filling Slurry pipeline transport technological design and lectotype selection are of great significance.
In the prior art, there are mainly two types of the assay methods of filling slurry resistance of ducting loss parameter:One is using ring Pipe simulation test measures the resistance of ducting loss of slurry, and as CN203385569U discloses a kind of material, will to convey times wire loop pipe real Check system, the utility model by the way that material pond, agitating device and test pipe, conveyance conduit are connected into a circulation loop, though The test of slurry performance parameter can be so completed, but the endless tube simulation test needs to establish large-scale pilot system, it is also desirable to pacify If delivery pump and a large amount of testing equipment, it is also necessary to occupy larger test site and a large amount of experiment material of consumption, and test Period is long, testing expenses are high;Another kind is the rheological behavior by measuring slurry, then carries out theoretical meter by structural fluid model It calculates to determine that the resistance of ducting under different working conditions is lost, such as a kind of filling mine pipeline of CN102507138A announcements One kind that test method and special equipment and CN101776514A are announced is used for testing rheological mechanical parameters of whole tailing structure liquid Method and device, the method and apparatus theoretical calculation that wherein CN102507138A is announced is comparatively laborious, and pulp density also needs For " 65%-74% ", application range is relatively narrow, and the method and device that CN101776514A is announced is by measuring full-tailing slurry delivery pipe The mean flow rate of full-tailing slurry under two different angles, to calculate the rheological mechanical parameters of whole tailing structure liquid, meter The complexity of calculation is higher, accuracy is relatively low, and the length of delivery pipe is 2500~4000mm, and the space occupied is also larger, also Need the slurry of more volume, materials more.
Invention content
It is provided a kind of for measuring the resistance of filling slurry pipeline the purpose of the present invention is overcoming the above-mentioned insufficient of the prior art The device and method of power loss parameter, its measurement accuracy is compared with high, calculating is simple, floor space is small, the test period is short, experiment Expense is low, materials are less.
The technical scheme is that:A kind of device for measuring filling slurry resistance of ducting loss parameter, including L-type Pipe, agitating device, speed governing force (forcing) pump, electromagnetic flowmeter, mobile support saddle, the agitating device and speed governing force (forcing) pump are fixed on On mobile support saddle, agitating device is located at below the end of L-type pipe horizontal segment, and the horizontal segment of the L-type pipe is by several short circuit groups At the vertical section top of internal diameter all same everywhere in L-type pipe, L-type pipe is equipped with feed hopper, and feed hopper is equipped with limit line, described One end of speed governing force (forcing) pump is connected to agitating device, and the other end is connected to by delivery hose with feed hopper, the electromagnetic flowmeter On delivery hose.
The further technical solution of the present invention is:The agitating device be equipped with aggregate bin, a side of aggregate bin and Bottom is equipped with opening, and the opening of side is connected to L-type pipe, and bottom opening is connected in agitating device.
Further, the feed hopper top is cylindrical structure, and lower part is conical structure, and limit line is located at feed hopper In superstructure.
Further, the cross-sectional area of L-type pipe vertical section of the feed hopper cross-sectional area more than 10 times at the limit line.
Further, the length of the short circuit is 50~500mm, and the inner wall of short circuit is smooth structure, and one end of short circuit is equipped with Internal thread, the other end are equipped with external screw thread.
Further, the speed governing force (forcing) pump is one kind in Pulp pump with frequency converter, metering pump, diaphragm pump.
Further, a kind of method for measuring filling slurry resistance of ducting loss parameter, includes the following steps:
(1)Certain density slurry is prepared in agitating device, the density that slurry is measured with concentration pot is γ, is then being adjusted A certain flow is pressed under the action of fast force (forcing) pump(It is measured using Electromagnetic Flow)It is delivered in feed hopper through delivery hose, Jin Erzai It enters in L-type pipe, the slurry exported out of L-type pipe is entered back into agitating device, is formed a circulation loop and is carried out slurry Circulation conveying;
(2)During slurry circulation conveys, the length of horizontal segment is adjusted by adjusting the quantity of L-type pipe horizontal segment L so that the height of slurry flushed with limit line or with limit the distance between line difference within the allowable range;
(3)By theoretical calculation, determine that the resistance of ducting loss parameter under the working condition, working condition are included in slurry The corresponding slurry flow rate of one timing of flow, caliber, material.
Further, the resistance of ducting loss parameterThe formula of theoretical calculation be:
In formula, γ is pulp density, and h is limited the difference between bit line absolute altitude and L-type pipe horizontal segment center line absolute altitude, and g is Acceleration of gravity takes 9.8m/s2, L is the total length of L-type pipe horizontal segment, and λ is correction factor.
Further, the numberical range of the correction factor λ is 1.08~1.2.
Further, the slurry level in the feed hopper with limit line the distance between be not more than 10mm.
The present invention has following features compared with prior art:
(1)A kind of device and method for measuring filling slurry resistance of ducting loss parameter provided by the invention uses The horizontal segment of L-type pipe is made of several short circuits, convenient for adjusting the length of L-type pipe horizontal segment, and by changing L-type pipe horizontal segment Length come with limit line be used cooperatively, test operation is simple, and suitable for various characters filler;
(2)What a kind of device and method for measuring filling slurry resistance of ducting loss parameter provided by the invention used Line is limited to control the height of slurry level, the survey tools such as box ruler need not be used to measure, measurement can be effectively reduced and missed Difference improves measurement accuracy;
(3)It is provided by the invention it is a kind of for measure in the device and method of filling slurry resistance of ducting loss parameter due to The height for limiting line is certain, need not measure, it is only necessary to determine the length L of the L-type pipe horizontal segment and density γ of slurry, it can root According to formula:Calculate resistance of ducting loss parameter, the method for data processing is simple, easily operated;
(4)A kind of device and method use for measuring filling slurry resistance of ducting loss parameter provided by the invention is stirred The end that device is placed on L-type pipe horizontal segment is mixed, and uses speed governing force (forcing) pump, can form circulation conveying line is:Agitating device → tune The horizontal segment of vertical section → L-type pipe of fast force (forcing) pump → delivery hose → feed hopper → L-type pipe(Including short circuit)→ aggregate bin → Agitating device, during guarantee test, phenomena such as slurry is not in isolation, caking, to which test measurement precision can be improved;
(5)A kind of device and method for measuring filling slurry resistance of ducting loss parameter provided by the invention uses one End is equipped with internal thread, and the other end is equipped with externally threaded short circuit, and is smooth structure on the inside of short circuit, both can quickly change L-type The length of pipe horizontal segment, and can guarantee that the leakproofness of the interface of short circuit is preferable, and the energy loss of joint can be effectively reduced, It is impacted also to can avoid mobility of the slurry in short circuit;
(6)A kind of device and method for measuring filling slurry resistance of ducting loss parameter provided by the invention is stirring The aggregate bin being arranged on device can effectively reduce and occur during the slurry flowed out from L-type pipe enters agitating device Spluttering phenomenon reduces the waste of resource, cost-effective, environmental protection.
In short, using a kind of device and method for measuring filling slurry resistance of ducting loss parameter provided by the invention Test method reliability to measure filling slurry resistance of ducting loss parameter is high, high certainty of measurement, is suitable for various characters Filling slurry, test operation and data processing method are simple, and experimental rig high certainty of measurement, easily operated, simple in structure, Reliably.
The detailed construction of the present invention is further described below in conjunction with the drawings and specific embodiments.
Description of the drawings
Fig. 1 is the assay device structures schematic diagram of the present invention;
Stress schematic diagram when Fig. 2 is the self-flowing pastefill of the present invention;
Fig. 3 is the structural schematic diagram of short circuit in the present invention.
Specific implementation mode
As shown in the picture:A kind of device for measuring filling slurry resistance of ducting loss parameter, including L-type pipe 3, stirring Device 6, speed governing force (forcing) pump 8, electromagnetic flowmeter 10, mobile support saddle 7, agitating device 6 and speed governing force (forcing) pump 8 are fixed on movement On bearing 7, agitating device 6 is located at below the end of 3 horizontal segment of L-type pipe, and the horizontal segment of L-type pipe 3 is made of several short circuits 4, It convenient for adjusting the length of 3 horizontal segment of L-type pipe, and is used cooperatively, is tried with limit line 1 by changing the length of 3 horizontal segment of L-type pipe Test filler easy to operate, and being suitable for various characters;Internal diameter all same everywhere in L-type pipe 3, the vertical section top of L-type pipe 3 End is equipped with feed hopper 2, and feed hopper 2 is equipped with limit line 1, and the limit line 1 that uses controls the height of slurry level, need not make It is measured with survey tools such as box rulers, measurement error can be effectively reduced, improve measurement accuracy;One end of speed governing force (forcing) pump 8 with Agitating device 6 is connected to, and the other end is connected to by delivery hose 9 with feed hopper 2, and electromagnetic flowmeter 10 is mounted on delivery hose 9.
Agitating device 6 is equipped with aggregate bin 5, and a side of aggregate bin 5 and bottom are equipped with opening, the opening of side and L-type pipe 3 is connected to, and bottom opening is connected in agitating device 6, and the slurry flowed out from L-type pipe 3 can be effectively reduced using aggregate bin 5 The spluttering phenomenon occurred during entering agitating device 6 reduces the waste of resource, cost-effective, environmental protection.
It is placed on the end of 3 horizontal segment of L-type pipe using agitating device 6, and using speed governing force (forcing) pump 8, circulation conveying can be formed Line is:The level of vertical section → L-type pipe 3 of agitating device 6 → speed governing force (forcing) pump 8 → delivery hose, 9 → feed hopper, 2 → L-type pipe 3 Section(Including short circuit)5 → agitating device of → aggregate bin 6, during guarantee test, phenomena such as slurry is not in isolation, caking, To which test measurement precision can be improved.
2 top of feed hopper is cylindrical structure, and lower part is conical structure, and limit line 1 is located at the superstructure of feed hopper 2 In.
Limit the cross-sectional area of L-type pipe 3 vertical section of the feed hopper cross-sectional area equal to 11 times at line 1.
The length of short circuit 4 is 50mm, can also be 100mm or 200mm or 500mm, and the inner wall of short circuit 4 is smooth structure, One end of short circuit 4 is equipped with internal thread, and the other end is equipped with external screw thread, both can quickly change L-type, the length of 3 horizontal segments, and can protect The leakproofness for demonstrate,proving the interface of short circuit 4 is preferable, and can effectively reduce the energy loss of joint, also can avoid slurry in short circuit 4 Interior mobility is impacted.
Speed governing force (forcing) pump 8 is the Pulp pump with frequency converter, it is ensured that the mobility of slurry is preferable.
A method of for measuring filling slurry resistance of ducting loss parameter, include the following steps:
(1)Certain density slurry is prepared in agitating device 6, the density that slurry is measured with concentration pot is γ, is then existed A certain flow is pressed under the action of speed governing force (forcing) pump 8(It is measured using Electromagnetic Flow), it is delivered in feed hopper 2 through delivery hose 9, And then enter back into L-type pipe 3, it is entered back into from the interior slurry exported of L-type pipe 3 into agitating device 6, forms a circulation loop Carry out the circulation conveying of slurry;
(2)During slurry circulation conveys, the length of horizontal segment is adjusted by adjusting the quantity of 3 horizontal segment of L-type pipe Spend L so that slurry level in feed hopper 2 and limit line 1 the distance between be not more than 10mm;
(3)By theoretical calculation, determine that the resistance of ducting loss parameter under the working condition, working condition are included in slurry Flow centainly corresponding slurry flow rate, caliber, material.
Resistance of ducting loss parameterTheoretical calculation method and principle be:Self-flowing pastefill of the slurry in L-type pipe 3 be The resistance of ducting is overcome to convey filling slurry using the potential energy of vertical pipe slurry, stress of the filling slurry in flowing is as follows Shown in Fig. 2, PgIt is the natural pressure head that slurry dead weight generates, PLFor friction loss, PjFor local resistance loss, according to energy Law of conservation can obtain following formula:
(1)
(2)
(3)
Local resistance loss Pj includes the losses such as connector, bend pipe, and calculating is complex, to simplify the calculation, takes local resistance Loss is calculated for the 10% of friction loss, i.e.,
Pj=0.1PL (4)
By formula(1)、(2)、(3)Bring formula into(3), after abbreviation:
(5)
In formula,For resistance of ducting loss parameter, γ is pulp density, and h is limited 3 horizontal segment of 1 absolute altitude of bit line and L-type pipe Difference between center line absolute altitude, g are acceleration of gravity, take 9.8m/s2, L is the total length of 3 horizontal segment of L-type pipe, correction factor λ=1.1。
Related data is obtained by experiment, substitutes into above-mentioned formula(5), you can calculate resistance of ducting loss parameter, by It is certain in the height of limit line, it need not measure, it is only necessary to determine the length L of the L-type pipe horizontal segment and density γ of slurry, energy According to formula:Calculate resistance of ducting loss parameter, the method for data processing is simple, easily operated.
The present invention operation principle and application method be:Slurry preparation is carried out using agitating device 6 by experimental design, is prepared After, pulp density γ is measured with concentration pot, before starting the cycle over conveying, the horizontal section length of L-type pipe 3 is maintained at initial shape State has the horizontal segment of 4 groups of l-shaped pipes 3 of a certain number of short circuits, the pump speed of speed governing force (forcing) pump 8 is adjusted by design requirement, opens Speed governing force (forcing) pump 8, open 6 valve of agitating device, carry out circulation conveying, circulation conveying for a period of time after, slurry level stablize after, If the liquid level of slurry not up to limits line 1 in 3 vertical section of L-type pipe, illustrates that the resistance of 3 horizontal segment of L-type pipe is less than normal, then stop defeated It send, one short circuit 4 is installed to extend the length of 3 horizontal segment of L-type pipe in 3 horizontal segment end of L-type pipe, then carry out circulation conveying.Just Under beginning state circulation conveying for a period of time, slurry level stablize after, if in 3 vertical section of L-type pipe slurry liquid level be more than limit line 1, then conveying of stopping dismantles a short circuit 4 in 3 horizontal segment end of L-type pipe and is used for shortening horizontal section length, then recycle defeated It send.By constantly adjusting the length of 3 horizontal segment of L-type pipe, until slurry level within the scope of the ± 10mm of limit line 1, measures simultaneously The 3 horizontal section length L of L-type pipe of record at this time.When horizontal section length adjusts, to ensure that 3 horizontal segment discharge port slurry of L-type pipe is complete Into in agitating device 6, by 7 movable stirring device 6 of mobile support saddle, coordinate the aggregate bin 5 of a side opening, it is therefore prevented that slurry splashes Go out.The 3 horizontal segment center line of absolute altitude and L-type pipe that experiment measures length L needed for pulp density γ, 3 horizontal segment of L-type pipe, limits line 1 Difference h between absolute altitude substitutes into above-mentioned formula(5), calculate under the working condition(Slurry flow rate, caliber, material)Pipeline Drag losses parameter.

Claims (9)

1. a kind of method for measuring filling slurry resistance of ducting loss parameter, it is characterised in that:It includes the following steps:
(1) certain density slurry is prepared in agitating device, the density that slurry is measured with concentration pot is γ, is then added in speed governing It is delivered in feed hopper, and then enters back into L-type pipe through delivery hose by a certain flow under the action of press pump, out of L-type pipe The slurry of output enters back into agitating device, forms the circulation conveying that a circulation loop carries out slurry;
(2) during slurry circulation conveys, the length L of horizontal segment is adjusted by adjusting the quantity of L-type pipe horizontal segment, is made The height of slurry flushes or poor within the allowable range with limit the distance between line with limit line;
(3) by theoretical calculation, determine that the resistance of ducting loss parameter under the working condition, working condition are included in slurry flow The corresponding slurry flow rate of one timing, caliber, material;
The device that the method uses, including L-type pipe, agitating device, speed governing force (forcing) pump, electromagnetic flowmeter, mobile support saddle, stirring Device and speed governing force (forcing) pump are fixed on mobile support saddle, and agitating device is located at below the end of L-type pipe horizontal segment, L-type pipe Horizontal segment be made of several short circuits, internal diameter all same everywhere in L-type pipe, the vertical section top of L-type pipe is equipped with feed hopper, into Hopper is equipped with limit line, and one end of speed governing force (forcing) pump is connected to agitating device, and the other end is connected by delivery hose and feed hopper Logical, electromagnetic flowmeter is mounted on delivery hose.
2. the method according to claim 1 for measuring filling slurry resistance of ducting loss parameter, resistance of ducting damage Lose parameterTheoretical calculation formula be:
In formula, γ is pulp density, and h is limited the difference between bit line absolute altitude and type pipe horizontal segment center line absolute altitude, and g adds for gravity Speed takes 9.8m/, L is the total length of L-type pipe horizontal segment,For correction factor;
3. the method according to claim 2 for measuring filling slurry resistance of ducting loss parameter, it is characterised in that:It repaiies Positive coefficientNumberical range be 1.08~1.2.
4. the method according to claim 1 for measuring filling slurry resistance of ducting loss parameter, it is characterised in that:Into Slurry level in hopper and limit line the distance between be not more than 10mm.
5. special according to the method that claim 1 ~ 4 any one of them is used to measure filling slurry resistance of ducting loss parameter Sign is:Agitating device is equipped with aggregate bin, and a side of aggregate bin and bottom are equipped with opening, the opening and L-type of side Pipe is connected to, and bottom opening is connected in agitating device.
6. special according to the method that claim 1 ~ 4 any one of them is used to measure filling slurry resistance of ducting loss parameter Sign is:Feed hopper top is cylindrical structure, and lower part is conical structure, and limit line is located in the superstructure of feed hopper.
7. the method according to claim 6 for measuring filling slurry resistance of ducting loss parameter, it is characterised in that:Limit The cross-sectional area of L-type pipe vertical section of the feed hopper cross-sectional area more than 10 times at bit line.
8. special according to the method that claim 1 ~ 4 any one of them is used to measure filling slurry resistance of ducting loss parameter Sign is:The length of short circuit is 50~500mm, and the inner wall of short circuit is smooth structure, and one end of short circuit is equipped with internal thread, another End is equipped with external screw thread.
9. special according to the method that claim 1 ~ 4 any one of them is used to measure filling slurry resistance of ducting loss parameter Sign is:Speed governing force (forcing) pump is one kind in Pulp pump with frequency converter, metering pump, diaphragm pump.
CN201510418243.1A 2015-07-16 2015-07-16 A kind of device and method for measuring filling slurry resistance of ducting loss parameter Active CN104964809B (en)

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CN106969263B (en) * 2017-03-17 2018-09-21 山东科技大学 Lotion ore slurry pipeline is along journey transporting resistance dynamic correcting method
CN107944163A (en) * 2017-11-30 2018-04-20 重庆工程职业技术学院 A kind of method for building up of flyash lotion pipe water power gradient model

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