CN105134611A - Residue pulp pump and delivery device thereof - Google Patents
Residue pulp pump and delivery device thereof Download PDFInfo
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- CN105134611A CN105134611A CN201510612916.7A CN201510612916A CN105134611A CN 105134611 A CN105134611 A CN 105134611A CN 201510612916 A CN201510612916 A CN 201510612916A CN 105134611 A CN105134611 A CN 105134611A
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- hopper
- pulp pump
- centrifugal impeller
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- flow blower
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Abstract
The invention discloses a residue pulp pump. The residue pulp pump comprises a housing and a spindle, wherein a suction inlet and a discharge outlet are formed in the housing, a centrifugal impeller and at least one axial flow impeller which are coaxially connected to the spindle are arranged in the housing, and the axial flow impellers are arranged on the side of the feeding direction of the centrifugal impeller. The residue pulp pump can deliver thickened pulp or high-vapor-content froth ore pulp. In addition, the invention further provides a delivery device including the residue pulp pump.
Description
Technical field
The present invention relates to rotary motive power pumping unit transportation art, the two-phase flow that particularly a kind of flow behavior is poor or the Pulp pump of three-phase flow medium and feedway thereof.
Background technique
In industries such as ore dressings; the medium of some poor fluidities is often carried by Centrifugal Slag Pump; as the foam produced containing the froth flotation process of solid, liquid, vapour three-phase; for another example ore pulp weight concentration reaches concentrate or the mine tailing (being often called as underflow) of high more than 55%; common Centrifugal Slag Pump, when carrying this kind of medium (being often called slurry), often can run into following problem:
Feed flow is starkly lower than Pulp pump design load: for raising the efficiency during common Pulp pump design, material feeding mouth (also the claiming suction port) section area of pump is generally 1.3-2.3 times of discharge port (also claiming discharge opening) sectional area; Pulp pump when design discharge is run, the flow velocity of its suction port general at 2.0-4.0m/s; But when carrying foam or underflow, because mobility is poor, the slurry entering impeller does not reach this flow velocity, does not reach design discharge from causing the feed flow of Pulp pump.
Flow passage part abrasion is serious: existing Pulp pump adopts abrasion resistance alloy manufacture mostly, and when carrying the foam ore pulp containing solid, liquid, vapour three-phase, due to the existence of a large amount of gas, flow passage part is easily because cavitation causes damaging.
CN103382940A discloses that a kind of practice shows for carrying the device in foam ore deposit, and this device really can carry the ore pulp containing foam, but while also show, when the foam ore pulp that conveying steam containing amount is higher, poor effect.
CN201016343 discloses a kind of pump carrying underflow, and the technological scheme of this application arranges an inducer at the entrance front place of impeller, by inducer, medium sent into impeller.Practice shows that this scheme can strengthen the flow of pump really, but the manufacturing process of inducer is complicated, the technology difficulty that the material adopting wear resistance good manufactures is very large, the life-span of inducer is made to be difficult to ensure, this technological scheme also has a deficiency to be that the coupling of inducer and centrifugal impeller is more difficult, and its reason is that the characteristic curve of the characteristic curve of inducer and centrifugal impeller is widely different.
Summary of the invention
Main purpose of the present invention is to provide a kind of Pulp pump carrying underflow or high steam containing amount foam ore pulp, and meanwhile, the present invention goes back the feedway of providing package containing this Pulp pump.
Technological scheme provided by the invention is: a kind of Pulp pump, comprise housing and main shaft, described housing is provided with suction port and discharge opening, be provided with in described housing and be coaxially connected to centrifugal impeller on main shaft and at least one axial-flow blower, described axial-flow blower is arranged on the feedstock direction side of centrifugal impeller.
The effect that the present invention arranges axial-flow blower in centrifugal impeller feedstock direction side is: the pressure reduction utilizing axial-flow blower to produce pushes slurry to centrifugal impeller, ensures the flow entering centrifugal impeller.Though axial-flow blower lift is lower, but be easy to realize larger flow, as long as ensure the flow that the flow of axial-flow blower produces when being greater than centrifugal impeller work during design, just can ensure that pump enters Centrifugal Impeller Inlet flow when the medium of flow behavior difference reaches the design discharge of centrifugal impeller.Because axial-flow blower can realize Effec-tive Function in wider range of flow, its higher efficiency range wants much wide compared with inducer, as long as reasonable in design, the characteristic curve of axial-flow blower can characteristic comparatively close with centrifugal impeller, and therefore axial-flow blower is easier relative to the coupling of inducer and centrifugal impeller with the coupling of centrifugal impeller.
The quantity of axial-flow blower is preferably 1, also can be set to 2 or 3 or more.
As well known in the art, this Pulp pump also comprises the parts of some necessity, and as bearing, coupling, shaft packing etc., to this, the application does not do too much restriction.
In above-mentioned Pulp pump, the sectional area of described suction port is more than or equal to 3 times of discharge opening sectional area, and it can make to remain on lower level into the slurry flow velocity of suction port, avoids cavitation occurs; Because suction port sectional area is too little, easily produce cavitation, too conference causes the decrease in efficiency of pump obvious, and therefore this ratio is preferably 4-7 doubly.
In above-mentioned Pulp pump, described suction port is arranged on main-shaft axis, and described discharge opening is arranged in the radial direction of centrifugal impeller.
In above-mentioned Pulp pump, the design discharge of described axial-flow blower is 150% ~ 300% of centrifugal impeller design discharge.Here stated design discharge refers to its best efficiency point flow.When the design discharge of axial-flow blower and centrifugal impeller has above-mentioned relation, the overlapping range in two kinds of efficient districts of impeller is wider, is conducive to the efficiency improving pump.
In above-mentioned Pulp pump, the lift of axial-flow blower is 1 ~ 8 meter, and optimum is 1.5-5 rice, and when the lift of axial-flow blower is too low, centrifugal impeller easily produces cavitation, easily causes axial-flow blower Fast Wearing time too high.
In above-mentioned Pulp pump, described centrifugal impeller is semi open model or closed, and the back shroud of described centrifugal impeller is provided with some back blades, can alleviate the pressure of shaft sealing place like this, improves the reliability of axial sealing mechanism.
Specific in practical application, under the foam conveying operating mode of low lift, centrifugal impeller is half-opened impeller, to improve the conveying capacity of foam.
Under high-lift underflow conveying operating mode, centrifugal impeller is double shrouded wheel, to improve the wear resistance of impeller.
In above-mentioned Pulp pump, under strong abrasion working condition, the overcurrent part of described centrifugal impeller and axial-flow blower all adopts composite abrasion resistance material to make.Specifically, skeleton part adopts metallic material manufacture, overcurrent part adopts composite abrasion resistance material, flow passage divides the part etc. comprising blade, back shroud and fluid contact, composite abrasion resistance material is formed by the combination of materials at least comprising abrasion resistant particles and resinoid bond, and described abrasion resistant particles is silicon carbide, corundum, silicon nitride, zirconium oxide, garnet a kind of or wherein several mixture.As the high-abrasive material described by patent application CN201210046902.X " a kind of wear-resisting pump housing and pump cover ".
But under the application operating mode of some common abrasions, axial-flow blower adopts abrasion resistance alloy manufacture, abrasion resistance alloy can be selected as high-chromium alloy, as Cr27, Cr15Mo3 etc.
In this application, also provide a kind of feedway, comprise the hopper that is provided with up big and down small hollow body structure, the bottom of described hopper is connected with at least one Pulp pump as above.Specifically, a Pulp pump can be set to, also two or more Pulp pump can be set, like this can as stand by pump.
In above-mentioned feedway, the top of described hopper is provided with supply pipe, can by the tangent setting of sidewall of described supply pipe and hopper.When medium tangentially enters hopper, the setting that the sidewall of supply pipe and hopper is tangent can drive slurry to rotate.Its effect is: be conducive to preventing slurry from occurring sedimentation when carrying high density slurry, and when carrying the slurry containing foam, the foam retained in groove can be carried secretly and see off by the eddy flow that the follow-up slurry entered produces, and prevents foam from accumulating and overflows.
In above-mentioned feedway, the bottom of described hopper is conical or polygonal pyramid shape, and the cone angle of described conical bottom is 40 ~ 150 °, is preferably 90 °, 120 ° etc.
In above-mentioned feedway, when the bottom of described hopper is conical, be provided with screeding device in described hopper, described screeding device comprises driving mechanism and scraper plate, and the internal surface of described scraper plate and the bottom of hopper matches.By arranging the rubbing board that can rotate around described conical axis and the driving mechanism driving rubbing board to rotate, the material of conical lower section sedimentation can be moved to the discharge port bottom hopper by described rubbing board and described driving mechanism, and enters in Pulp pump and discharge.
In above-mentioned feedway, the bottom of described hopper is connected in sequence by multiple up big and down small hollow pipeline.
In above-mentioned feedway, when the slurry carried is flotation froth, the internal surface of the bottom of described hopper is provided with the guide plate of one or more arc, in case fluid produced strong eddy flow, makes its swirl strength in the scope of expection.
In above-mentioned feedway, when the slurry carried is underflow, in described hopper, be provided with stirring apparatus.
Beneficial effect of the present invention is as follows:
1, Pulp pump of the present invention adopts the combination of centrifugal impeller and axial-flow blower, and axial-flow blower is forced to push slurry to centrifugal impeller, effectively can improve transfer efficiency and the stability of the medium of poor fluidity, be applicable to the fluid of different operating mode.
2, the sectional area of suction port and the ratio of discharge opening sectional area can reduce the flow velocity of suction port slurry, ensure that the flow of pump reaches design load, and prevent cavitation.
3, the design discharge of axial-flow blower and the ratio of centrifugal impeller design discharge can improve the efficiency of pump.
4, the pressure of the favourable reduction sealing mechanism of some back blades is set on the back shroud of centrifugal impeller, and improves the reliability of sealing mechanism.
5, feedway of the present invention adopts the hopper of up big and down small hollow and Pulp pump to coordinate, and can improve transfer efficiency and the stability of the flowing medium of poor fluidity further, be applicable to the fluid of different operating mode.
Accompanying drawing explanation
Fig. 1 is the plan view of the embodiment of the present invention 1;
Fig. 2 is the plan view of the embodiment of the present invention 1;
Fig. 3 is the sectional view of the Pulp pump of the embodiment of the present invention 1;
Fig. 4 is the plan view of the Pulp pump of the embodiment of the present invention 1;
Fig. 5 is the sectional view of the centrifugal impeller of the embodiment of the present invention 1;
Fig. 6 is the stereogram of the centrifugal impeller of the embodiment of the present invention 1;
Fig. 7 is the stereogram of the axial-flow blower of the embodiment of the present invention 1;
Fig. 8 is the structural representation of the embodiment of the present invention 2;
Fig. 9 is the structural representation of the embodiment of the present invention 3;
Figure 10 is the plan view of the embodiment of the present invention 3;
Figure 11 is the structural representation of the embodiment of the present invention 4;
Figure 12 is the structural representation of the embodiment of the present invention 5.
Embodiment
Below in conjunction with embodiment, technological scheme of the present invention is described in further detail, but does not form any limitation of the invention.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of underflow foam delivery device, comprise Pulp pump 1, hopper 2, described hopper 2 bottom is conical, and the tangential stock inlet 3 arranged is arranged at described hopper 2 top, and described hopper 2 bottom is provided with exhaust port 4, the inwall of the bottom of described hopper is provided with the guide plate 5 of arc, and guide plate 5 is for reducing fluid levels component velocity and increase fluid orthogonal component velocity; Described exhaust port 4 is connected with Pulp pump 1 by pipeline 6.Cone angle bottom hopper is 90 degree.
The concrete structure of Pulp pump 1 as shown in Figure 3 and Figure 4, supporting Pulp pump comprises bearing portion assembly 13, main shaft 14, centrifugal impeller 15, axial-flow blower 16, sub-propeller 17, filler 18, centrifugal impeller 15, axial-flow blower 16 are coaxially connected on main shaft 14, axial-flow blower 16 shown in Fig. 7, employing abrasion resistance alloy manufactures, and is provided with screw thread 27 and is connected with main shaft 14 or centrifugal impeller 15; Sub-propeller 17 can reduce the sealing load at filler 18 place, improves the reliability of sealing; Described suction port 19 is arranged on the axis of main shaft 14, described discharge opening 20 is arranged in the radial direction of centrifugal impeller 15, the internal diameter of suction port 19 is 240mm, and the internal diameter of discharge opening 20 is 100mm, and the section area of suction port 19 is 5.76 times of the section area of discharge opening 20.In the suction port position of axial-flow blower 16, be provided with wear-resistant pipe 21, the material of wear-resistant pipe 21 is aforementioned composite abrasion resistance material, and the main composition of composite abrasion resistance material is corundum and resin.
In the present embodiment, the design discharge of axial-flow blower is: 400 cubic meters/hour; The design discharge of centrifugal impeller is: 200 cubic meters/hour; The lift of axial-flow blower is 2.5 meters, and the slurry flow velocity of suction port is 1.23m/s.
Centrifugal impeller shown in Fig. 5, Fig. 6 is semi open model impeller, and being blades 23 in the side of its cover plate 22, is back blades 24 at its opposite side.The overcurrent position of centrifugal impeller adopts composite abrasion resistance material manufacture, connection part is provided with metal frame 25, metal frame 25 is provided with screw thread 26 and is connected with main shaft.
The Pulp pump of the present embodiment is when rated flow workload, and suction port flow velocity only needs 1.23m/s, is significantly less than the 2.0-4.0m/s of common Pulp pump, not easily produce cavitation, add the promotion of axial-flow blower, so when carrying foam and underflow, can guarantee that its flow reaches design load.
Embodiment 2
As described in Figure 8, the present embodiment is substantially identical with embodiment 1, and different places is, the present embodiment adds stirring apparatus 7 in hopper 2, and described stirring apparatus 7 is driven by mixer drive 8, to prevent settling ore pulp, meets the requirement of underflow conveying.
In the present embodiment, the internal diameter of suction port 19 is 350mm, and the internal diameter of discharge opening 20 is 150mm, and the section area of suction port 19 is 5.44 times of the section area of discharge opening 20.The main composition of composite abrasion resistance material is silicon carbide and resin.
In the present embodiment, the design discharge of axial-flow blower is: 450 cubic meters/hour; The design discharge of centrifugal impeller is: 300 cubic meters/hour, and the ratio of the two design discharge is 150%; The flow velocity of suction port slurry is 0.87m/s, and the rated lift of axial-flow blower is 2 meters.
In the present embodiment, because suction port flow velocity is only 0.87m/s, the effect of axial-flow blower is not only can promote slurry stream to centrifugal impeller, can also prevent underflow from blocking suction port because of the too low generation sedimentation of flow velocity.
Embodiment 3
As shown in Figure 9 and Figure 10, the present embodiment is substantially identical with embodiment 1, and different places is, the bottom of hopper 2 is parallel with two Pulp pump 1, and wherein one is used as stand by pump.
Embodiment 4
As shown in figure 11, the present embodiment is substantially identical with embodiment 1, different places is, in the present embodiment, described hopper 2 inwall is not provided with the guide plate 5 of arc, the substitute is a screeding device, and described screeding device comprises driving mechanism 10 and scraper plate 9, described scraper plate 9 matches with the internal surface of the bottom of hopper 2, and the cone angle bottom hopper 2 is 120 degree.The present embodiment is suitable for carrying underflow.
Embodiment 5
As shown in figure 12, the present embodiment is substantially identical with embodiment 1, different places is, the bottom of hopper 2 is that several are mutually several angle, hollow, multiple up big and down small frustoconic shape pipeline 11 is connected in turn, when ore pulp enters from stock inlet 3, produce and rotate, when ore pulp arrives bottom, because described frustoconic shape pipeline 11 is mutually several angle, the blocked rotation of ore pulp, and make its rotational speed within the scope of expectation, slurry will be conducive to and enter Pulp pump 1 by pipeline 6, the present embodiment not only may be used for carrying foam, may be used for carrying underflow.Obviously, according to the process conditions of processing, the polygonal pyramid shape hollow pipeline that hopper 2 bottom in this enforcement also can adopt several up big and down small is connected in turn.
Above-describedly be only preferred embodiment of the present invention, all do within the scope of the spirit and principles in the present invention any amendment, equivalently to replace and improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a Pulp pump, comprise housing and main shaft, described housing is provided with suction port and discharge opening, it is characterized in that: be provided with in described housing and be coaxially connected to centrifugal impeller on main shaft and at least one axial-flow blower, described axial-flow blower is arranged on the feedstock direction side of described centrifugal impeller.
2. Pulp pump according to claim 1, is characterized in that: the sectional area of described suction port is more than or equal to 3 times of discharge opening sectional area.
3. Pulp pump according to claim 2, is characterized in that: described suction port is arranged on main-shaft axis, and described discharge opening is arranged in the radial direction of centrifugal impeller.
4. Pulp pump according to claim 1, is characterized in that: the design discharge of described axial-flow blower is 150% ~ 300% of centrifugal impeller design discharge.
5. Pulp pump according to claim 4, is characterized in that: the lift of axial-flow blower is 1 ~ 8 meter.
6. Pulp pump according to claim 1, is characterized in that: described centrifugal impeller is semi open model or closed, and the back shroud of described centrifugal impeller is provided with some back blades.
7., according to the arbitrary described Pulp pump of claim 1 to 6, it is characterized in that: the overcurrent part of described centrifugal impeller and axial-flow blower all adopts composite abrasion resistance material to make.
8. a feedway, comprises the hopper that is provided with up big and down small hollow body structure, it is characterized in that: the bottom of described hopper be connected with at least one as arbitrary in claim 1 to 7 as described in Pulp pump.
9. feedway according to claim 8, is characterized in that: the top of described hopper is provided with supply pipe, described supply pipe and the sidewall of hopper tangent.
10. feedway according to claim 8, is characterized in that: the bottom of described hopper is conical or polygonal pyramid shape, and the cone angle of described conical bottom is 40 ~ 150 °.
11. feedways according to claim 10, it is characterized in that: when the bottom of described hopper is for time conical, screeding device is provided with in described hopper, the scraper plate that described screeding device comprises driving mechanism and is connected with driving mechanism, the internal surface of described scraper plate and the bottom of hopper matches.
12. feedways according to claim 8, is characterized in that: the bottom of described hopper is connected in sequence by multiple up big and down small hollow pipeline.
13. according to Claim 8 ~ 12 arbitrary described feedways, is characterized in that: the internal surface of the bottom of described hopper is provided with the guide plate of one or more restriction slurry rotation.
14. according to Claim 8 ~ 12 arbitrary described feedways, is characterized in that: be provided with stirring apparatus in described hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612916.7A CN105134611A (en) | 2015-09-23 | 2015-09-23 | Residue pulp pump and delivery device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612916.7A CN105134611A (en) | 2015-09-23 | 2015-09-23 | Residue pulp pump and delivery device thereof |
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| CN105134611A true CN105134611A (en) | 2015-12-09 |
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| CN201510612916.7A Pending CN105134611A (en) | 2015-09-23 | 2015-09-23 | Residue pulp pump and delivery device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107620735A (en) * | 2017-10-23 | 2018-01-23 | 衡阳市稼乐农机科技有限公司 | A kind of silt remover blade wheel structure |
| CN112576521A (en) * | 2020-12-09 | 2021-03-30 | 黄工机械集团有限公司 | Combined type sweeping cabin impeller for improving sweeping cabin capacity of centrifugal deep well pump |
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Effective date of registration: 20180323 Address after: 510000 room 1204, West Block 238, six road, Yuexiu District, Guangdong, Guangzhou, Zhongshan Applicant after: New Mstar Technology Ltd in Guangzhou Address before: 510115 Guangdong, Guangzhou, Jiefang Middle Road No. 306 on the third floor of the 302 304A room Applicant before: GUANGZHOU TOTALL FLUID EQUIPMENT TECHNOLOGY CO., LTD. |
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