CN204961321U - Double helix sewage filth submerged motor pump - Google Patents
Double helix sewage filth submerged motor pump Download PDFInfo
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- CN204961321U CN204961321U CN201520513512.8U CN201520513512U CN204961321U CN 204961321 U CN204961321 U CN 204961321U CN 201520513512 U CN201520513512 U CN 201520513512U CN 204961321 U CN204961321 U CN 204961321U
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Abstract
The utility model relates to a double helix sewage filth submerged motor pump, include base, the pump body, impeller and drive through an axis of rotation rotating impeller's motor, the import and the export orientation mutually perpendicular of the pump body, the impeller is by two spiral blades, each the blade includes entrance point and exit end, follows axis of rotation axis of orientation clockwise distorts the spiral, forms the helicoid on 2 -4 layer. The utility model discloses a double helix sewage filth submerged motor pump include since the impeller only by two spiral blades, and each the blade is followed axis of rotation axis of orientation clockwise distorts the spiral, the spiral that forms is at 2 -4 layer circle, the fluid runner space that forms like this is very big, the relative length of runner is moderate, easy debris, especially flexible debris pass through, the difficult jam, furthermore, the efficiency of this kind of impeller, obviously improve with other double helix sewage filth submerged motor pump looks specific efficiencies, the performance is also good, when large -traffic or high -lift, input power is steady, the problem that can not produce double shrouded wheel overpower when large -traffic appears, can be in the required use of each lift, the blowdown is particularly suitable for.
Description
Technical field
The utility model relates to a kind of water pump, especially for the Submerged Motor Pumps of blowdown.
Background technique
Sewage Submerged Motor Pumps in the market and sewage cutting dredge pump mainly adopt semi-open centrifugal impeller or the shrouded centrifugal impellor of conventional construction.Due to the reasons in structure of above two kinds of impellers, semi-open centrifugal impeller is meeting water pump outside large discharge and effective particulate matter passing capacity, and water lift of pump is relatively on the low side, and application area is restricted.Shrouded centrifugal impellor solves the not high problem of lift well, but, in sewage, the passing rate of particulate matter is lower, namely easily blocked by particle foreign material, and the easy overpower of motor is run under the Environmental Conditions of large discharge low lift, overpower operation can make motor more easily generate heat, and such long-play easily reduces motor working life, even causes burn-down of electric motor.Therefore, people finding always a kind of flow process and lift can, but the pollution discharge pump that particulate matter passing capacity is very high again.
In the Environmental Conditions in sewage treatment and sewage lifting field, often there is the cotton dirts such as straw, towel, work gloves, mouth mask in water, also there will be sheath, rubber gloves etc. and there are flexible dirt or foreign material, even there will be the working environment that herding class ight soil, poultry feather etc. are severe.If use traditional semi-open type and open type centrifugal impeller, above-mentioned dirt can be wrapped on impeller after entering the pump housing very soon, and cause impeller stuck, water pump quits work.For this reason, sewage cutting pump is in the market all on the basis of sewage Submerged Motor Pumps, and hold before the impeller and separately establish one or more cutting device, this also considerably increases manufacture cost.Especially, due to that use or traditional half-opened impeller, do not improve at the aspect of performance of water pump, even in cutting process, performance dies down, and causes power consumption to increase, thus easily causes burn-down of electric motor when using in rugged environment.
Publication number is that Chinese the utility model of CN201013653Y patent discloses a kind of cutting type sewage dirt Submerged Motor Pumps being applicable to various blowdown place, include motor, the pump housing, the black box of electric pump and cutting device, wherein cutting device is made up of impeller and the cutting disk being arranged on pump housing water inlet position place, cutting disk offers water inlet, utilize the serrated edge on cutting disk and the cutter head on blade medial extremity, and semicircle skewed slot seamed edge on cutting disk surface and blade outboard seamed edge, mutual formation sawing and shearing, foreign material in medium are cut etc., avoid foreign material and produce slippage at cutting edge, pile up and the drawback that causes cutting effect to decline, serrated edge on this cutting disk, due to the radial arrangement that blade is not at pump intake, stripping and slicing foreign material effect is undesirable, and, the impeller of pump disclosed in this patent is a centrifugal pump, runner is inherently very narrow, the effect of blowdown is unsatisfactory.
In NBS, axial-flow pump and sewage water discharge pump are exactly two kinds of different pumps.Axial-flow pump blowdown mud and aqueous mixtures, flow is large, and lift is low, and the effluent discharge of sewage water discharge pump mainly undersize item, because Environmental Conditions more badly has foreign material and enters in sewage.CN102434487 Chinese utility model patent discloses a kind of method for designing double-helix axial-flow pump impeller, its double helix blade can improve impeller balance effect, reduce vibration & noise during pump operation, but this helical blade according to axial flow (importing and exporting direction consistent) pump is not suitable for also not being used on small-sized submersible centrifugal electric pump.
Model utility content
The technical problems to be solved in the utility model is to provide the high and double helix sewage/waste electrical submersible pump can effectively discharged with impurity such as flexible dirts of a kind of efficiency.
For achieving the above object, the technical solution of the utility model is as follows:
Double helix sewage/waste electrical submersible pump, comprising:
Base,
Be arranged on the pump housing on described base;
Be arranged on the impeller in the described pump housing;
The motor of described wheel rotation is driven by a rotatingshaft;
The import of the described pump housing is mutually vertical with Way out, and described impeller is made up of two screw blades, and blade described in each comprises entrance point and outlet end, along described rotating shaft direction axle clockwise direction canted coil, forms the helicoid of layer 2-4.
In an embodiment of the present utility model, the helicoid that described blade is formed is 2 layers.
In an embodiment of the present utility model, the entrance point of each blade described forms the limit vertical with described rotatingshaft.
In an embodiment of the present utility model, the entrance point of each blade described forms the face vertical with described rotatingshaft.
In an embodiment of the present utility model, the outlet end of each blade described forms the limit parallel with described rotatingshaft.
In an embodiment of the present utility model, the outlet end of each blade described forms the face parallel with described rotatingshaft.
In an embodiment of the present utility model, described blade from described entrance point to described outlet end spiral surrounding expanded angle scope at 220 ° to 360 °.
In an embodiment of the present utility model, the diameter D of described blade and blade thickness H is vertically 3-6 than H/D.
In an embodiment of the present utility model, be provided with the cutting device for cutting the foreign material contained in the sewage before entering impeller in the front end of described impeller.
In an embodiment of the present utility model, described cutting device is formed in the blade of the entrance point of each blade.
In an embodiment of the present utility model, described cutting device is provided with some slitting wheel, and described slitting wheel are arranged along the radial direction extension of impeller.
In an embodiment of the present utility model, described cutting assembling device is a circular beater plate, described cutterhead is provided with inner ring and outer ring, and described slitting wheel extend along the radial direction of impeller and are formed between described inner ring and outer ring, and that meets current at described slitting wheel is provided with blade.
In an embodiment of the present utility model, described in each, the both sides of slitting wheel are all provided with blade.
In an embodiment of the present utility model, described blade is continuous print.
In an embodiment of the present utility model, described blade is interval, is made up of several most advanced and sophisticated blades.
In an embodiment of the present utility model, described in each, the inside of outer ring is provided with cutting edge.
By technique scheme, the beneficial effects of the utility model are:
Double helix sewage/waste electrical submersible pump of the present utility model comprises because impeller is only made up of two screw blades, , and blade described in each is along described rotating shaft direction axle clockwise direction canted coil, the spiral formed is at layer 2-4 circle, under the import and the orthogonal situation of Way out of the described pump housing, the fluid course space of such formation is very large, runner relative length is also moderate, be easy to foreign material, particularly the passing through of flexible foreign material, not easily result in blockage, and, the efficiency of this impeller, significantly improve with other double helix sewage/waste electrical submersible pump phase specific efficiency, performance is also good, large discharge or high-lift time, input power is all stable, when can not produce double shrouded wheel large discharge, superpower problem occurs, can use by point needed for each lift, be particularly suitable for the blowdown of Submerged Motor Pumps.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is double helix sewage/waste electrical submersible pump structural representation of the present utility model;
Fig. 2 is the stereogram of an embodiment of the utility model double helix sewage/waste electrical submersible pump impeller;
Fig. 3 A and 3B is the impeller of double helix sewage/waste electrical submersible pump of the present utility model and the combination Sum decomposition figure of cutting device;
Fig. 4 A-4D is the structural representation of each embodiment of cutting device;
Fig. 5 is the structural representation of the impeller of Fig. 2;
Fig. 6 is the sectional drawing of the impeller of Fig. 5;
Fig. 7 is hydraulic performance efficiency test figure of the present utility model.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
See Fig. 1, double helix sewage/waste electrical submersible pump of the present utility model is similar with conventional Submerged Motor Pumps structural type, comprises base 3, the pump housing 1, motor (not illustrating), impeller 2.The pump housing 1 is arranged on base 2, and impeller 2 is arranged in the pump housing 1.Motor is rotated by rotatingshaft 8 impeller 2.Cutting device 5 is arranged on the front end of impeller 2, is used for cutting the foreign material (dirt) contained in the sewage before entering impeller 2.
As can be seen from Figure 1, the import 11 of the pump housing 1 of the present utility model is mutually vertical with the direction of outlet 12, and similar conventional centrifugal pump is not axial-flow pump.Liquid enters from import 11, through impeller 2, from outlet 12 out.
See Fig. 2, the impeller 2 of an embodiment of the present utility model is provided with two blades 21,22 and base plate 23, and blade 21,22 is screw blades.
Blade 21 is provided with entrance point 211 and outlet end 212, and entrance point 211 forms a limit vertical with rotatingshaft 8, certainly, because blade 21 itself has thickness, in fact also can to form a face; This limit or face almost vertical with rotatingshaft 8, namely almost parallel with the face of base plate 23.Outlet end 212 forms the limit almost parallel with rotatingshaft 8, because blade 21 itself has thickness, also can to form a face, this limit or face almost vertical with the face of base plate 23.
Equally, blade 22 is provided with entrance point 221 and outlet end 222, and entrance point 221 forms a limit vertical with rotatingshaft 8, certainly, because blade 22 itself has thickness, in fact also can to form a face; This limit or face almost vertical with rotatingshaft 8, namely almost parallel with the face of base plate 23.Outlet end 222 forms the limit almost parallel with rotatingshaft 8, because blade 22 itself has thickness, also can to form a face, this limit or face almost vertical with the face of base plate 23.
Blade 21,22 stops along rotating shaft direction axle and from respective entrance point 211,221 clockwise direction canted coil to outlet end 221,222 respectively.In the present embodiment, the helicoid that each blade is formed is 2 layers.The helicoid that the blade of double helix sewage/waste electrical submersible pump of the present utility model is formed can in the scope of layer 2-4 circle, and such effect is fine, can reach the purpose of this utility model.
Further, the spiral surrounding expanded angle scope of each blade from its entrance point to outlet end to 420 °, at the present embodiment, is 360 ° at 300 °
Again see Fig. 2, the entrance point 211,221 of the blade 21,22 of the present embodiment forms sharp blade (face), the face that edge line is vertical with rotatingshaft 8 is almost parallel, like this, is easy to the dirt first cutting the runner coming in also not enter impeller 2 from pump inlet 11.
Particularly, do not installing the other cutting device as the cutting device 5, this entrance point at blade 21,22 is arranged to blade, namely, slitting wheel, serve the pollution discharge capability improving double helix sewage/waste electrical submersible pump of the present utility model and further improve effect.And, can see, the utility model people passes through research and analysis, utilize the open blade 21 of spiral of the present utility model, 22 entrance points 211 formed, 221, at this entrance point stroke cutting edge, and make the face that edge line is almost vertical with rotatingshaft 8 parallel, next dirt (dye) thing of convection current can be met in front, more easily cut dirt, simultaneously, do not affect and arrange other cutting or flow guide devices before the impeller more yet, the cutting device of such formation, do not need to increase other structure yet, structure is simple, effective reduction cost of production, also be a distinguishing feature of the present utility model.
Equally, the outlet end 221,222 of the blade 21,22 of the present embodiment forms sharp blade, that is, slitting wheel, edge line and rotating shaft are almost parallel, like this, cut the dirt that may enter in impeller channel further.Now, the dirt of direction also in the face of flowing out in runner of this blade, cutting effect is better, does not also affect the rotation of impeller 2.And the slitting wheel formed like this, do not need other structure, structure is simple, ingenious, effectively reduces cost of production.
See Fig. 3 A and 3B, cutting device 5 is arranged in the front end of impeller 2.Cutting device 5 is provided with circular beater plate 54 and some slitting wheel (bar) 51.Cutting device 5 can be arranged on the front end (see Fig. 3 B) of impeller 2.
Again see Fig. 4 A-4C, cutterhead 54 has inner ring 541 and outer ring 542 to form, and cutting knife bar 51 is one shaft-like, and the radial direction along impeller 2 extends and arranges, two ends are connected with outer ring 542 with inner ring 541 respectively.Cutting knife bar 51 extends along the radial direction of impeller 2 can while form cutting edge, and this cutting edge can be continuous print, also can as embodiment, the multiple most advanced and sophisticated blade of gap-forming (diamond pattern wedge angle blade) 511.Certainly, cutting edge (will be further described below) can also be formed on the both sides of cutting knife bar 51.
In the embodiment of Fig. 4 A, cutterhead 54 has 3 cutting knife bars 51, and each cutting knife bar 51 has 3 most advanced and sophisticated blades 511.
In the embodiment of Fig. 4 B, cutterhead 54 has 4 cutting knife bars 51, and each slitting wheel 51 have 3 most advanced and sophisticated blades 511.
In the embodiment of Fig. 4 C, cutterhead 54 has 3 cutting knife bars 51, and each slitting wheel 51 have 2 most advanced and sophisticated blades 511.
Fig. 4 D is another embodiment of the cutting device 5 of double helix sewage/waste electrical submersible pump of the present utility model.In this embodiment, cutting device 5 is made up of the cutter 501 of such as 3 radial arrangement, each cutter 501 is foliaceous, has blade 562, is fixed on central seat 502, this central seat 502 can be fixed with rotatingshaft 8, such as, central seat 502 can be provided with hole 551, the part of being stretched out in the front end of the impeller 2 of rotatingshaft 8 by a key or guide and fixing, certainly, the screw thread of the part also can stretched out by screw thread and this is mutually rotated and fixes.Certainly, above-mentioned cutting device 5 also can arrange 2,4, or the cutter 501 of other quantity.
The utility model people is found by research, for the cutting device 5 of this cutterhead shape of Fig. 4 A-4C, if be provided with circumferential slitting wheel 52 (see Fig. 4 A) in the internal circumference of outer ring 542 again, the quantity being not only slitting wheel simply increases, but by interacting with the cutting knife bar 51 of radial arrangement, make in a flash in office, cutting knife bar 51 can carry out tearing type cutting at different direction to foreign material with circumferential slitting wheel 52 simultaneously, the effect of this cutting is desirable especially, reach unforeseeable cutting effect, especially to various flexible foreign material, as plastics, rubber, weaving category, foreign material still have stronger cutting power, this is that the cutting device of existing pollution discharge pump is unexistent, thus, it makes the pollution discharge capability of pump greatly improve.
In addition, see Fig. 4 A-4C, the slitting wheel 51 or 52 of cutterhead 54, take multiple diamond pattern wedge angle blade 511, and advantage is that in cutting process, multiple diamond pattern wedge angle can prevent impurity from skidding, and is conducive to reaching better cutting effect.In addition, cutting knife bar 51 adopts two-sided knife-edge design, is namely also provided with multiple diamond pattern wedge angle blade 511 ' at another side, like this, in use after wearing and tearing, cutterhead 54 can be turned over through specialized maintenance personnel, just can reuse, effectively extend the working life of cutterhead 5, be skillfully constructed.
See Fig. 5 and Fig. 6, in this embodiment, the angle of spread α of the blade 21,22 of impeller 2 is 360 °, and ideal range is between 270 ° to 420 °.In addition, the diameter D of blade is preferably 4.8 with blade thickness H vertically than H/D, and ideal range is 3-6.
Fig. 7 is the hydraulic performance test chart of double helix sewage/waste electrical submersible pump of the present utility model.The electronic product detection of this row test oil Zhejiang Province is provided.This figure has reacted lift H, efficiency EM with the relation between pump power.According to Fig. 7, the plotted curve of power P 1 is more smooth all the time, and this illustrates, under the condition of each ancestor's lift H, input power is all very steady.Particularly, input power large discharge or high-lift time input power still steady, this also illustrates open double helix blade impeller of the present utility model, and hydraulic performance is better, and pollutant passing ability is good.And existing enclosed impeller usual power when large discharge is abnormal high, occur that superpower problem occurs.
Wherein, through test, the contrast of the performance that the double helix sewage/waste electrical submersible pump of the utility model 1.5 kilowatts and NBS require is as follows:
| Standard | The utility model |
| Flow standard value: 15m 3/h | Meet standard |
| Lift reference value: be greater than 10m | 15.48m |
| Efficiency: 32.3% | Efficiency by inputoutput test: 44.96% |
Wherein 0.7 times of maximum output 1.474KW being to 1.3 times of amount flows.
Can be found out by description above, the import of the pump housing of the double helix sewage/waste electrical submersible pump that the utility model provides is mutually vertical with Way out, impeller 2 is made up of two screw blades, , each blade 2 comprises entrance point 21 and outlet end 22, along the axis of orientation clockwise direction canted coil of rotatingshaft 8, the spiral formed is at layer 2-4 circle, this open impeller both solved centrifugal close or semiclosed runner of also taking turns narrow, pollutant is unfavorable for pass through and the blockage problem caused, simultaneously, hydraulic efficiency is fine, large discharge or high-lift time, input power is still very stable, efficiency is fine.Meanwhile, if coordinate cutting device 5 of the present utility model more together, effect is better.
It is to be noted, for those skilled in the art, according to the characteristic of the pump impeller blade fluid of qualifications " described impeller is made up of two screw blades; blade described in each comprises entrance point and outlet end; along described rotating shaft direction axle clockwise direction canted coil; form the helicoid of layer 2-4 " and related domain, the blade reaching the utility model object just can be produced.
By description above, for those skilled in the art, on the basis of above-mentioned disclosed model utility content, still can make following change or adjustment, can the purpose of this utility model be realized equally:
1, cutting device 5 of the present utility model can save, and its pollutant is still fine by performance.
2, the entrance point of blade 21,22 be arranged to blade also can with the cutting device of Fig. 4 A to 4D with the use of, effect is better.
3, entrance point 211 both can form a limit vertical with rotatingshaft, also can to form an end face.This limit or face and rotatingshaft 8 are almost vertical just passable, unnecessary completely vertical.
4, outlet end 212 face both can form the limit parallel with rotatingshaft, also can to form an end face.Because blade 21 itself has thickness, a face also can be to form.This limit or face and rotatingshaft 8 are almost parallel just passable, unnecessary completely parallel.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (16)
1. double helix sewage/waste electrical submersible pump, comprising:
Base,
Be arranged on the pump housing on described base;
Be arranged on the impeller in the described pump housing;
The motor of described wheel rotation is driven by a rotatingshaft;
It is characterized in that,
The import of the described pump housing is mutually vertical with Way out, and described impeller is made up of two screw blades, and blade described in each comprises entrance point and outlet end, along described rotating shaft direction axle clockwise direction canted coil, forms the helicoid of layer 2-4.
2. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, the helicoid that described blade is formed is 2 layers.
3. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, the entrance point of each blade described forms the limit vertical with described rotatingshaft.
4. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, the entrance point of each blade described forms the face vertical with described rotatingshaft.
5. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, the outlet end of each blade described forms the limit parallel with described rotatingshaft.
6. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, the outlet end of each blade described forms the face parallel with described rotatingshaft.
7. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, described blade from described entrance point to described outlet end spiral surrounding expanded angle scope at 220 ° to 360 °.
8. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, the diameter D of described blade and blade thickness H is vertically 3-6 than H/D.
9. double helix sewage/waste electrical submersible pump as claimed in claim 1, is characterized in that, being provided with the cutting device for cutting the foreign material contained in the sewage before entering impeller in the front end of described impeller.
10. double helix sewage/waste electrical submersible pump as claimed in claim 9, it is characterized in that, described cutting device is formed in the blade of the entrance point of each blade.
11. double helix sewage/waste electrical submersible pumps as claimed in claim 9, it is characterized in that, described cutting device is provided with some slitting wheel, and described slitting wheel are arranged along the radial direction extension of impeller.
12. double helix sewage/waste electrical submersible pumps as claimed in claim 11, it is characterized in that, described cutting assembling device is a circular beater plate, described cutterhead is provided with inner ring and outer ring, described slitting wheel extend along the radial direction of impeller and are formed between described inner ring and outer ring, and that meets current at described slitting wheel is provided with blade.
13. double helix sewage/waste electrical submersible pumps as claimed in claim 12, it is characterized in that, described in each, the both sides of slitting wheel are all provided with blade.
14. double helix sewage/waste electrical submersible pumps as claimed in claim 13, it is characterized in that, described blade is continuous print.
15. double helix sewage/waste electrical submersible pumps as claimed in claim 13, it is characterized in that, described blade is interval, is made up of several most advanced and sophisticated blades.
16. double helix sewage/waste electrical submersible pumps as claimed in claim 12, it is characterized in that, described in each, the inside of outer ring is provided with cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520513512.8U CN204961321U (en) | 2015-07-15 | 2015-07-15 | Double helix sewage filth submerged motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520513512.8U CN204961321U (en) | 2015-07-15 | 2015-07-15 | Double helix sewage filth submerged motor pump |
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| Publication Number | Publication Date |
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| CN204961321U true CN204961321U (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520513512.8U Active CN204961321U (en) | 2015-07-15 | 2015-07-15 | Double helix sewage filth submerged motor pump |
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| CN (1) | CN204961321U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351851A (en) * | 2015-07-15 | 2017-01-25 | 台州新宏基泵业有限公司 | Duplex sewage and dirt submersible electric pump |
| CN108506221A (en) * | 2018-05-04 | 2018-09-07 | 解树超 | It removes contamination within the scope of a kind of total head Anti-blockage sump pump |
-
2015
- 2015-07-15 CN CN201520513512.8U patent/CN204961321U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351851A (en) * | 2015-07-15 | 2017-01-25 | 台州新宏基泵业有限公司 | Duplex sewage and dirt submersible electric pump |
| CN108506221A (en) * | 2018-05-04 | 2018-09-07 | 解树超 | It removes contamination within the scope of a kind of total head Anti-blockage sump pump |
| CN108506221B (en) * | 2018-05-04 | 2023-08-25 | 解树超 | Sewage pump capable of cleaning and blocking in full-lift range |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Double screw sewage submersible pump Effective date of registration: 20211207 Granted publication date: 20160113 Pledgee: Zhejiang Wenling United Village Bank Co., Ltd Pledgor: TAIZHOU XINHONGJI PUMP CO.,LTD. Registration number: Y2021330002489 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |