CN104405649B - Single suction entrance double suction self-balancing immersible pump - Google Patents
Single suction entrance double suction self-balancing immersible pump Download PDFInfo
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- CN104405649B CN104405649B CN201410667667.7A CN201410667667A CN104405649B CN 104405649 B CN104405649 B CN 104405649B CN 201410667667 A CN201410667667 A CN 201410667667A CN 104405649 B CN104405649 B CN 104405649B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 206
- 108091006146 Channels Proteins 0.000 claims description 13
- 102000010637 Aquaporins Human genes 0.000 claims description 11
- 108010063290 Aquaporins Proteins 0.000 claims description 11
- 230000002153 concerted effect Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 2
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Abstract
Present invention relates particularly to a kind of single suction entrance double suction self-balancing immersible pump.This immersible pump includes pump shaft and the suction casing axially set gradually, the first Spit Section, the first pump water section, shunting section, the second pump water section, the second Spit Section and water exit end along pump shaft；The outlet of suction casing and the water inlet of the first Spit Section are connected, first discharge opening of the first Spit Section water flow passage of coming in the first pump water section is connected with shunting section, and the outlet of shunting section water inlet, the water inlet of the second pump water section with the first pump water section respectively is connected；The outlet of the first pump water section, the outlet of the second pump water section are all connected with water exit end by the second Spit Section；The water inlet of the first impeller in the first pump water section and the second impeller in the second pump water section is oppositely arranged.The present invention not only decreases the length of immersible pump, makes pump structure become simple, also reduces the weight of whole immersible pump, saves material and energy consumption, also reduces the fault rate of immersible pump simultaneously.
Description
Technical field
The invention belongs to pump technology field, be specifically related to a kind of single suction entrance double suction self-balancing immersible pump.
Background technology
Along with the raising of the level of production, submersible pump is applied to the main draining of production in mine, forced-ventilated water more and more
With flood after well in complex ore draining.And being continuously increased along with coal mining depth, the displacement in colliery is the biggest, the most more
Add the immersible pump of the big flow of needs, and it is low to require that immersible pump sucks water level.At present, double suction submersible pump should in coal mine drainage
With the widest.Conventional double suction submersible pump is respectively provided with a suction inlet, due to immersible pump in the top and bottom of immersible pump
Upper end is provided with suction inlet, therefore conventional double suction submersible pump operationally, need to be installed in whole immersible pump liquid level with
Under, therefore the requirement to water level is the highest, and when water level is provided with suction inlet less than the upper end of immersible pump, whole electric pump can not work
Make, thus bring many difficulties to mining production.
Summary of the invention
For solving the deficiency of above-mentioned prior art, the invention provides a kind of single suction entrance double suction self-balancing immersible pump, this
What immersible pump was not only able to meet colliery normally produces needs, and greatly reduces the requirement to colliery water level, structure letter
List and drainage effect are good.
For achieving the above object, present invention employs techniques below scheme:
A kind of single suction entrance double suction self-balancing immersible pump, including pump shaft, this immersible pump include along pump shaft the most successively
Suction casing, the first Spit Section, the first pump water section, shunting section, the second pump water section, the second Spit Section and the water exit end arranged；
The outlet of described suction casing and the water inlet of the first Spit Section are connected, the first discharge of described first Spit Section
Water flow passage of coming mouthful in the first pump water section is connected with shunting section, the outlet of described shunting section respectively with the first pump water section
Water inlet, the water inlet of the second pump water section is connected；The outlet of the first pump water section, the outlet of the second pump water section all pass through
Second Spit Section is connected with water exit end；
Impeller set-up mode in described first pump water section and the second pump water section makes when immersible pump works, the first pump water
Axial force suffered by Duan make a concerted effort and axial force suffered by the second pump water section make a concerted effort point to mutually the other side.
Preferably, described first pump water section includes the first pump case and the first stator being set on pump shaft, the first pump water section
In be additionally provided with and first stator one_to_one corresponding arrange the first impeller, the first impeller is sheathed to be fixed on pump shaft, and described first leads
Leaf is arranged on the back side in the water delivery direction of the first corresponding impeller, and described first pump case is set in the first stator and the first impeller
All sides；Described first pump case, the first stator and the first impeller three constitute a first water delivery mechanism, described first water conveying machine
Structure has multiple along pump shaft axially arranged；
Described second pump water section includes the second pump case and the second stator being set on pump shaft, is additionally provided with in the second pump water section
The second impeller arranged with the second stator one_to_one corresponding, the second impeller is sheathed to be fixed on pump shaft, and described second stator is arranged on
The back side in the water delivery direction of the second corresponding impeller, described second pump case is set in all sides of the second stator and the second impeller；
Described second pump case, the second stator and the second impeller three constitute a second water delivery mechanism, and described second water delivery mechanism is along pump
Axle axially arranged has multiple；
The water inlet of described first impeller and the second impeller is oppositely arranged.
Preferably, described first pump case there are the hole passed through for pull bar and the stream passed through for fluid along the axially arranged of pump shaft
Road, the runner on described first pump case includes setting up separately in the first pump case both sides and parallel to each other carrying out water flow passage and supply water flow passage；
Described come the water inlet end of water flow passage and the first discharge opening UNICOM of the first Spit Section, come water side and the institute of water flow passage
The water inlet stating shunting section is connected；The outlet of described shunting section respectively with impeller eye and the head of chopped-off head the first water delivery mechanism
The impeller eye of level the second water delivery mechanism is connected, and the impeller outlet of final stage the first water delivery mechanism and the second of the first Spit Section tell
Outlet is connected；
Second discharge opening of the described water inlet end supplying water flow passage and the first Spit Section is connected, and the water side for water flow passage leads to
The flow channels crossed on described shunting section is connected with the water transport channel on the second pump case；The outlet of described water transport channel passes through
Second Spit Section is connected with water exit end；
The medial wall of described first pump case and the first impeller and the first stator enclose the first pump aquaporin jointly, described next
Water flow passage, the first pump aquaporin and confession water flow passage are sequentially connected one complete passage of composition；
The hole passed through for pull bar and the water delivery be arrangeding in parallel with pull bar is had along the axially arranged of pump shaft on described second pump case
Passage, the medial wall of described second pump case and the second impeller and the second stator enclose the second pump aquaporin jointly, and described second
The outlet of pump aquaporin is connected with water exit end by the second Spit Section.
Preferably, described shunting section includes the shunting pump case being set in outside pump shaft, and the inner side of described shunting pump case is arranged
There is the splitter vane being set on pump shaft；Described splitter vane by shunting pump case inner chamber be divided into respectively with in the first pump water section
First flow that the impeller eye of chopped-off head the first water delivery mechanism is connected and with chopped-off head the second water delivery mechanism in the second pump water section
The second runner of being connected of impeller eye.
Preferably, this immersible pump is provided with drive end in the downside of suction casing, and described drive end is provided with output shaft and pump shaft
Joining motor, in the outer suction hood being placed on tubular of described motor, the upside of described suction hood joins with the suction casing of immersible pump
Being connected together, the downside of described suction hood is uncovered shape.
Beneficial effects of the present invention is as follows:
1), present invention middle part in the first pump water section and the second pump water section is provided with and is connected with the runner in the two respectively
Shunting section, as long as the water therefore carried by suction casing can reach shunting section and can realize respectively to the first pump water section and second
The purpose that pump water section supplies water；Owing to shunting section is arranged on the middle part in the first pump water section and the second pump water section, i.e. shunting section distance
The height of suction casing suction inlet is relatively low, and therefore the single-stage intake impeller of suction casing will be fully able to meet and be carried from suction casing by water
Power to shunting section needs.
Compared to the immersible pump of double suction entrance of the prior art, the present invention has only to arrange one in the bottom of immersible pump
Individual suction inlet, this structure of the present invention not only decreases the length of immersible pump, and makes pump structure become simple, also
Reduce the weight of whole immersible pump, save material and energy consumption, also reduce the fault rate of immersible pump simultaneously.Additionally, this is latent
Need not relay pump during pump working, drainage speed is the most very fast.
2), in the present invention, multiple first impellers in the first pump water section and multiple second impellers in the second pump water section
Water inlet is oppositely arranged, so that during immersible pump work, making a concerted effort and the second pump water of the axial force suffered by the first pump water section
The making a concerted effort of axial force suffered by Duan pointing to mutually the other side, this structure can make on pump shaft suffered axial force offset mutually
Disappear, thereby further ensured that stability when pump shaft works, balance and reliability.
Accompanying drawing explanation
Fig. 1 is the structural representation of submersible pump.
Fig. 2 is the structural representation of immersible pump.
Fig. 3 is the structural representation operationally of the submersible pump in the present invention.
The implication of the reference in figure is as follows:
10 drive end 11 motor 12 suction hood 20 pump shafts
30 immersible pump 31 suction casing 311 suction inlet 312 intake impellers
32 first Spit Section 321 first discharge opening 322 second discharge openings
33 first pump water section 331 first pump case 332 first stators
333 first impellers 334 carry out water flow passage 335 for water flow passage
34 shunting section 341 splitter vane 342 first flow 343 second runners
344 flow channels 35 second pump water section 351 second pump cases
352 second stator 353 second impeller 354 water transport channel
36 second Spit Section 37 water exit end 38 pull bars
Detailed description of the invention
As shown in Figure 1, 2, this immersible pump includes pump shaft 20, also includes the suction casing axially set gradually along pump shaft 20
31, first Spit Section the 32, first pump water section 33, shunting section the 34, second pump water section the 35, second Spit Section 36 and water exit end 37.Draw
Bar 38 sequentially passes through suction casing the 31, first Spit Section the 32, first pump water section 33, shunting section the 34, second pump water section 35, second spues
Section 36 and water exit end 37 and by seven part constitute immersible pump entirety.
As in figure 2 it is shown, described suction casing 31 includes that intake impeller 312, the downside of intake impeller 312 are provided with suction inlet 311,
As in figure 2 it is shown, the upside of described suction casing 31 is provided with the first Spit Section 32, the first Spit Section 32 is provided with two discharges
Mouthful, wherein the first discharge opening 321 is connected with the water flow passage 334 of coming in the first pump water section 33, the second discharge opening 322 and the first pump
Confession water flow passage 335 in water section 33 is connected.
As in figure 2 it is shown, the upside of the first Spit Section 32 is provided with the first pump water section 33.Described first pump water section 33 includes sheathed
The first pump case 331 and the first stator 332 on pump shaft 20, is additionally provided with in the first pump water section 33 and the first stator 332 1 a pair
The first impeller 333 that should arrange, the first impeller 333 is sheathed to be fixed on pump shaft 20, and described first stator 333 is arranged on corresponding
The back side in water delivery direction of the first impeller 333, described first pump case 331 is set in the first stator 332 and the first impeller 333
All sides；Described first pump case the 331, first stator 332 and the first impeller 333 three constitute a first water delivery mechanism, and described
One water delivery mechanism has multiple along pump shaft 20 axially arranged；The impeller eye of described chopped-off head the first water delivery mechanism being in upside with
The outlet of the second runner 343 of shunting section 34 is connected；The medial wall of described first pump case 331 and the first impeller 333 and the
One stator 332 encloses the first pump aquaporin jointly, described come water flow passage the 334, first pump aquaporin and for water flow passage 335 successively
It is connected and constitutes a complete passage running through multiple first water delivery mechanism；It is in the leaf of final stage the first water delivery mechanism of lower side
Wheel outlet is connected with the second discharge opening 322 of the first Spit Section 32.Second discharge opening 322 of the first Spit Section 32 is by successively
The water transport channel 354 in flow channels the 344, second pump water section 35 on the confession water flow passage 335 that is connected, shunting section 34, second tell
The section of going out 36 and be connected with water exit end 37.
The upside of the first pump water section 33 is provided with shunting section 34, and described shunting section 34 includes being set in the shunting outside pump shaft 20
Pump case, the inner side of described shunting pump case is provided with the splitter vane 341 being set on pump shaft 20；Described splitter vane 341 will divide
The inner chamber of stream pump case is divided into first that impeller eye with chopped-off head the first water delivery mechanism in the first pump water section 33 respectively is connected
The second runner 343 that runner 342 and the impeller eye with chopped-off head the second water delivery mechanism in the second pump water section 35 are connected, described
Shunting pump case inner chamber with described come water flow passage 334 water side be connected.
As in figure 2 it is shown, the upside of shunting section 34 is provided with the second pump water section.Described second pump water section 35 includes being set in pump shaft
The second pump case 351 and the second stator 352 on 20, is additionally provided with in the second pump water section 35 and arranges with the second stator 352 one_to_one corresponding
The second impeller 353, the second impeller 353 is sheathed to be fixed on pump shaft 20, and described second stator 352 is arranged on corresponding second
The back side in the water delivery direction of impeller 353, described second pump case 351 is set in the second stator 352 and all sides of the second impeller 353；
Described second pump case the 351, second stator 352 and the second impeller 353 three constitute a second water delivery mechanism, described second water delivery
Mechanism has multiple along pump shaft 20 axially arranged；It is in impeller eye and the shunting section 34 of chopped-off head the second water delivery mechanism of downside
The outlet of first flow 342 is connected；The medial wall of described second pump case 351 is total to the second impeller 353 and the second stator 352
With enclosing the second pump aquaporin running through multiple second water delivery mechanism, the outlet of described second pump aquaporin is i.e. in upside
The outlet of final stage the second water delivery mechanism be connected with water exit end 37 by the second Spit Section 36.
As shown in Figure 1, 2, 3, the first impeller 333 in described first pump water section 33 and the second leaf in the second pump water section 35
The water inlet of wheel 353 is oppositely arranged, thus when immersible pump work, and making a concerted effort and the of the axial force suffered by the first pump water section 33
Axial force suffered by two pump water sections 35 make a concerted effort point to mutually the other side.
As shown in Figure 1,3, this immersible pump is provided with drive end 10 in the downside of suction casing 31, and described drive end 10 is provided with defeated
Shaft and the joining motor of pump shaft 11, in the outer suction hood 12 being placed on tubular of described motor 11, the upside of described suction hood 12
Being linked together with the suction casing 31 of immersible pump, the downside of described suction hood 12 is uncovered shape.
The work process of 2,3 couples of present invention is described further below in conjunction with the accompanying drawings.
As it is shown on figure 3, submersible pump is arranged in mine, whole submersible pump is divided into immersible pump 30 from top to bottom and drives
Holding 10 two parts, the output shaft of the motor 11 in drive end 10 is connected with pump shaft 20.When this immersible pump is installed, it is only necessary to make suction
Suction inlet 311 on the downside of the section of entering 31 is placed in below liquid level.
During work, motor 11 rotates, and water is entered suction hood 12 by downside, with after through suction inlet 311 in the section of being inhaled into 31
Intake impeller 312 pressurized delivered at shunting section 34, current at shunting section 34 respectively through first flow 342 and the second runner
343 are delivered at the first pump water section 33 and the second pump water section 35.
The water entering the first pump water section 33 is transported to first tells through the pressurization of multiple first impellers 333 from top to bottom
At second discharge opening 322 of the section of going out 32, the most upwards through supplying flow channels the 344, second pump on water flow passage 335, shunting section 34
Water transport channel the 354, second Spit Section 36 in water section 35 and be connected with water exit end 37.
The water entering the second pump water section 35 is transported to second tells through the pressurization of multiple second impellers 353 from bottom to top
At the section of going out 36, the most upwards it is connected discharge through water exit end 37.
Claims (3)
1. a single suction entrance double suction self-balancing immersible pump, including pump shaft (20), it is characterised in that: this immersible pump includes along pump
The suction casing (31) axially set gradually of axle (20), the first Spit Section (32), the first pump water section (33), shunting section (34),
Two pumps water section (35), the second Spit Section (36) and water exit end (37)；
The outlet of described suction casing (31) and the water inlet of the first Spit Section (32) are connected, described first Spit Section (32)
First discharge opening (321) water flow passage of coming on the first pump water section (33) is connected with shunting section (34), described shunting section
(34) outlet water inlet, the water inlet of the second pump water section (35) with the first pump water section (33) respectively is connected；First pump
The outlet of water section (33), the outlet of the second pump water section (35) are all connected with water exit end (37) by the second Spit Section (36)
Logical；
Impeller set-up mode in described first pump water section (33) and the second pump water section (35) makes when immersible pump works, and first
Making a concerted effort of axial force suffered by pump water section (33) is right with the sensing mutually of making a concerted effort of the axial force suffered by the second pump water section (35)
Side；
Described first pump water section (33) includes the first pump case (331) and the first stator (332) being set on pump shaft (20), first
Being additionally provided with the first impeller (333) arranged with the first stator (332) one_to_one corresponding in pump water section (33), the first impeller (333) overlaps
If being fixed on pump shaft (20), described first stator (332) is arranged on the back of the body in the water delivery direction of corresponding the first impeller (333)
Face, described first pump case (331) is set in the first stator (332) and all sides of the first impeller (333)；Described first pump case
(331), the first stator (332) and the first impeller (333) three constitute a first water delivery mechanism, described first water delivery mechanism edge
Pump shaft (20) axially arranged has multiple；
Described second pump water section (35) includes the second pump case (351) and the second stator (352) being set on pump shaft (20), second
Being additionally provided with the second impeller (353) arranged with the second stator (352) one_to_one corresponding in pump water section (35), the second impeller (353) overlaps
If being fixed on pump shaft (20), described second stator (352) is arranged on the back of the body in the water delivery direction of corresponding the second impeller (353)
Face, described second pump case (351) is set in the second stator (352) and all sides of the second impeller (353)；Described second pump case
(351), the second stator (352) and the second impeller (353) three constitute a second water delivery mechanism, described second water delivery mechanism edge
Pump shaft (20) axially arranged has multiple；
The water inlet of described first impeller (333) and the second impeller (353) is oppositely arranged；
The hole passed through for pull bar and the stream passed through for fluid is had along the axially arranged of pump shaft (20) on described first pump case (331)
Road, the runner on described first pump case (331) includes setting up separately in the first pump case (331) both sides and parallel to each other carrys out water flow passage
(334) and for water flow passage (335)；
Described come the water inlet end of water flow passage (334) and the first discharge opening (321) UNICOM of the first Spit Section (32), carry out water flow passage
(334) water side is connected with the water inlet of described shunting section (34)；The outlet of described shunting section (34) respectively with chopped-off head
The impeller eye of the first water delivery mechanism is connected with the impeller eye of chopped-off head the second water delivery mechanism, the leaf of final stage the first water delivery mechanism
Wheel outlet is connected with second discharge opening (322) of the first Spit Section (32)；
Second discharge opening (322) of the described water inlet end supplying water flow passage (335) and the first Spit Section (32) is connected, for water flow passage
Water side by the flow channels (344) on described shunting section (34) and water transport channel (354) phase on the second pump case (351)
UNICOM；The outlet of described water transport channel (354) is connected with water exit end (37) by the second Spit Section (36)；
The medial wall of described first pump case (331) encloses the first pump water jointly with the first impeller (333) and the first stator (332)
Passage, described come water flow passage, the first pump aquaporin and for water flow passage be sequentially connected composition one complete passage；
Have, along pump shaft (20) axially arranged, the hole passed through for pull bar on described second pump case (351) and be arranged in parallel with pull bar
Water transport channel (354), the medial wall of described second pump case (351) encloses jointly with the second impeller (353) and the second stator (352)
Becoming the second pump aquaporin, the outlet of described second pump aquaporin is connected with water exit end (37) by the second Spit Section (36).
Single suction entrance double suction self-balancing immersible pump the most according to claim 1, it is characterised in that: described shunting section (34) wraps
Including the shunting pump case being set in pump shaft (20) outside, the inner side of described shunting pump case is provided with point water being set on pump shaft (20)
Blade (341)；Described splitter vane (341) inner chamber of shunting pump case is divided into respectively with the chopped-off head in the first pump water section (33) the
First flow (342) that the impeller eye of one water delivery mechanism is connected and with chopped-off head the second water conveying machine in the second pump water section (35)
The second runner (343) that the impeller eye of structure is connected.
3. according to the single suction entrance double suction self-balancing immersible pump described in any one of claim 1,2, it is characterised in that: this immersible pump
Be provided with drive end (10) in the downside of suction casing (31), described drive end (10) is provided with output shaft and the joining motor of pump shaft
(11), in the outer suction hood (12) being placed on tubular of described motor (11), the upside of described suction hood (12) and the suction of immersible pump
Section (31) is linked together, and the downside of described suction hood (12) is uncovered shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667667.7A CN104405649B (en) | 2014-11-20 | 2014-11-20 | Single suction entrance double suction self-balancing immersible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667667.7A CN104405649B (en) | 2014-11-20 | 2014-11-20 | Single suction entrance double suction self-balancing immersible pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104405649A CN104405649A (en) | 2015-03-11 |
| CN104405649B true CN104405649B (en) | 2016-09-14 |
Family
ID=52643303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410667667.7A Active CN104405649B (en) | 2014-11-20 | 2014-11-20 | Single suction entrance double suction self-balancing immersible pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405649B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285075A (en) * | 2019-07-11 | 2019-09-27 | 合肥恒大江海泵业股份有限公司 | A kind of diving double suction electric pump |
| CN110439845B (en) * | 2019-08-09 | 2020-12-11 | 绿美泵业有限公司 | Low water level single-port double-suction self-balancing submersible pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048124U (en) * | 1988-08-12 | 1989-11-22 | 合肥电机厂 | Single-abserb submersible pumps with automatic balance |
| CN2158934Y (en) * | 1992-12-12 | 1994-03-16 | 西安交通大学 | Axial balancing submerged pump |
| CN102734180A (en) * | 2012-06-28 | 2012-10-17 | 合肥恒大江海泵业股份有限公司 | Multistage submersible pump working stably and reliably |
| CN204327522U (en) * | 2014-11-20 | 2015-05-13 | 合肥恒大江海泵业股份有限公司 | Single suction entrance double suction self balancing submersible pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8801360B2 (en) * | 2009-09-09 | 2014-08-12 | Baker Hughes Incorporated | Centrifugal pump with thrust balance holes in diffuser |
-
2014
- 2014-11-20 CN CN201410667667.7A patent/CN104405649B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048124U (en) * | 1988-08-12 | 1989-11-22 | 合肥电机厂 | Single-abserb submersible pumps with automatic balance |
| CN2158934Y (en) * | 1992-12-12 | 1994-03-16 | 西安交通大学 | Axial balancing submerged pump |
| CN102734180A (en) * | 2012-06-28 | 2012-10-17 | 合肥恒大江海泵业股份有限公司 | Multistage submersible pump working stably and reliably |
| CN204327522U (en) * | 2014-11-20 | 2015-05-13 | 合肥恒大江海泵业股份有限公司 | Single suction entrance double suction self balancing submersible pump |
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| Publication number | Publication date |
|---|---|
| CN104405649A (en) | 2015-03-11 |
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Denomination of invention: Single suction double suction self balancing submersible pump Effective date of registration: 20231129 Granted publication date: 20160914 Pledgee: Industrial and Commercial Bank of China Changfeng Branch Pledgor: HEFEI HENGDA JIANGHAI PUMP Co.,Ltd. Registration number: Y2023980068468 |
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