CN111237205B - A combined device for protecting cables and preventing the unit from lifting for a submersible electric pump - Google Patents
A combined device for protecting cables and preventing the unit from lifting for a submersible electric pump Download PDFInfo
- Publication number
- CN111237205B CN111237205B CN202010220383.9A CN202010220383A CN111237205B CN 111237205 B CN111237205 B CN 111237205B CN 202010220383 A CN202010220383 A CN 202010220383A CN 111237205 B CN111237205 B CN 111237205B
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- Prior art keywords
- sealing
- tube
- cable
- electric pump
- submersible electric
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0693—Details or arrangements of the wiring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明公开了一种潜水电泵用电缆防护和机组防抬组合装置，包括主井筒、井盖、潜水电泵、电缆密封管、组合机构，所述主井筒的内部设置有潜水电泵，所述潜水电泵的顶部出线端固定连接有电缆密封管，所述电缆密封管的顶部通过固定连接有组合机构，所述主井筒的顶部固定安装有井盖；本发明安装好井盖将压板和密封垫固定于井盖上，套入防抬压圈通过螺杆压紧并锁死潜水电泵可以有效防止潜水电泵发生抬机、旋转、倾斜等现象；电缆密封管设置隔离输送介质与电缆的直接接触，同时密封垫、O型密封圈和出线管密封垫的设置可以有效密封，防止外部输送介质通过配合面和缝隙进入电缆密封管内部，从而有效保护电缆。
The present invention discloses a combined device for cable protection and unit anti-lifting for a submersible electric pump, comprising a main wellbore, a well cover, a submersible electric pump, a cable sealing tube and a combined mechanism, wherein a submersible electric pump is arranged inside the main wellbore, a top outlet terminal of the submersible electric pump is fixedly connected with a cable sealing tube, a top of the cable sealing tube is fixedly connected with a combined mechanism, and a well cover is fixedly installed on the top of the main wellbore; the well cover is installed to fix a pressure plate and a sealing gasket on the well cover, an anti-lifting pressure ring is inserted and tightened by a screw to lock the submersible electric pump, so as to effectively prevent the submersible electric pump from lifting, rotating, tilting and the like; the cable sealing tube is arranged to isolate the direct contact between the conveying medium and the cable, and at the same time, the arrangement of the sealing gasket, the O-ring and the outlet pipe sealing gasket can effectively seal and prevent the external conveying medium from entering the cable sealing tube through the matching surface and the gap, so as to effectively protect the cable.
Description
Technical Field
The invention relates to the technical field of submersible electric pumps, in particular to a cable protection and unit lifting prevention combined device for a submersible electric pump.
Background
The submerged motor pump is widely applied to the fields of industrial and agricultural production, mines, urban construction and the like, and is mainly used for drainage, irrigation, landscapes, source water lifting, river treatment and the like;
The submerged motor pump is convenient to overhaul and maintain and adopts a well barrel type installation mode, and typical shaft type installation modes include a steel shaft, a cement shaft and the like. In practical application, the submersible electric pump often causes the submersible electric pump unit to lift, rotate and incline due to reverse moment generated by starting the water pump or reverse water thrust generated by reversing the water pump, so that the cable of the submersible electric pump unit is stirred, finally, the submersible electric pump unit cannot operate due to cable damage or breakage, or the submersible electric pump unit cannot operate due to incline, or the submersible electric pump unit cannot operate due to operation faults such as unit vibration and the like, meanwhile, the cable is in contact with a conveying medium due to long-term flushing or foreign matter impact of the cable when the submersible electric pump is arranged in a shaft, finally, water enters the cable from the damaged position after the appearance of the cable is damaged, flows into the inner cavity of the motor through a gap between cable core wires, and causes serious quality accidents such as incapacitation of water inlet alarm of the motor or stator burnout.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a cable protection and unit lifting prevention combined device for a submersible electric pump, which aims at solving the problems that in the use process of the conventional shaft type installation submersible electric pump, a motor cable for the submersible electric pump contacts with a conveying medium, the cable is worn out due to long-term flushing or foreign matter impact, reverse torque generated by starting the submersible electric pump unit or reverse water thrust generated by water pump reverse is easy to generate pump body rotation or inclination, and accidents such as unstable unit operation or faults are caused. The invention discloses a cable protection and unit lifting prevention combined device for a submerged electric pump, which can effectively prevent the submerged electric pump unit from faults such as lifting, rotation, inclination, cable abrasion and the like in the running process of the submerged electric pump.
The aim of the invention can be achieved by the following technical scheme:
The cable protection and unit lifting prevention combined device for the submerged pump comprises a main shaft, a well cover, the submerged pump, a cable sealing pipe and a combined mechanism, wherein the submerged pump is arranged in the main shaft, the cable sealing pipe is fixedly connected to the outlet end of the top of the submerged pump, the combined mechanism is fixedly connected to the top of the cable sealing pipe, the well cover is fixedly arranged at the top of the main shaft, and the well cover is fixedly connected with the combined mechanism;
The main well barrel comprises a barrel body I, a seat ring is fixedly welded at the bottom of the barrel body I, a 60-degree cone angle is adopted by the seat ring, a submerged motor pump is placed on the seat ring, a foundation flange and a reinforcing rib plate are fixedly welded outside the barrel body I, the foundation flange is located above the reinforcing rib plate, and a side well barrel is fixedly installed on one side of the barrel body I.
As a further scheme of the invention, the cable sealing tube comprises a cable tube, hanging plates are fixedly arranged at two ends of the top of the cable tube, an upper flange is arranged at the top of the cable tube, a taper tube is fixedly arranged at the bottom of the cable tube, a cylinder body II is fixedly arranged at the bottom of the taper tube, a lower flange is fixedly arranged at the bottom of the cylinder body II, the lower flange is fixedly connected with a flange on the submerged electric pump, and a top outlet end of the submerged electric pump is inserted into the cylinder body II and the taper tube.
The combined mechanism comprises a sealing tube, a compression ring, a sealing seat, a pressing plate, a sealing flange, first bolts, second bolts and third bolts, wherein the pressing plate is fixedly arranged on the well cover, the sealing seat is fixedly connected to the upper side of the pressing plate through the first bolts, the sealing seat is of a Z-shaped structure, the pressing ring is fixedly connected to the upper side of the sealing seat through the third bolts, the second bolts are vertically arranged at one end, close to the sealing tube, of the pressing plate, the sealing flange is arranged at the lower end of the sealing tube and connected with the upper flange through the second bolts, the second bolts are locked through screw rods, 4-6 screws are circumferentially arranged and are respectively located above the sealing flange and the pressing plate, the screw rods are compressed through screw holes on the pressing plate to prevent lifting of the pressing plate, and then the screw rods are locked through nuts.
As a further scheme of the invention, an O-shaped sealing ring is arranged between the sealing seat and the compression ring.
As a further scheme of the invention, the second bolt is sleeved with an anti-lifting pressing ring, and the anti-lifting pressing ring is positioned below the pressing plate.
As a further scheme of the invention, sealing gaskets are arranged between the pressing plate, the sealing seat and the well cover.
As a further scheme of the invention, a sealing gasket of the outlet pipe is arranged between the upper flange and the sealing flange.
As a further scheme of the invention, the assembly device comprises the following installation steps:
Firstly, the top outlet end of a submerged motor pump is fixedly connected with a cable sealing tube, firstly, the top outlet end of the submerged motor pump is inserted into a cylinder body II and a taper tube and is fixed through a lower flange, the submerged motor pump is lifted through a lifting lug, then the submerged motor pump is located on a shaft seat ring, the seat ring adopts a 60-DEG taper angle, the submerged motor pump is located on the seat ring by self gravity and has the functions of automatically centering, positioning and stabilizing a pump body;
step two, mounting the well cover on the main shaft, fixing the pressing plate and the sealing gasket on the well cover, sleeving an anti-lifting ring on the bolt II, and then compacting and locking the submerged motor pump through the screw rod;
And step two, installing the sealing gasket and the sealing seat on the pressing plate, and sealing and compacting the pressing ring and the sealing tube through the O-shaped sealing ring by using a bolt III.
The invention has the beneficial effects that the upper outgoing line part of the submerged pump is fixedly connected with the cable sealing pipe through bolts, the outgoing line end at the top of the submerged pump is firstly inserted into the cylinder body II and the taper pipe and is fixed through the lower flange, the submerged pump is lifted through the lifting lug and is then located on the shaft seat ring, the seat ring adopts a 60-DEG taper angle, the submerged pump is located on the seat ring by utilizing self gravity and has the functions of automatic centering, positioning and stabilizing the pump body, the matching part of the guide vane body of the submerged pump and the seat ring is also designed into the 60-DEG taper angle and is provided with the sealing ring, thus, when the submerged pump is installed, the automatic centering, positioning and sealing of the submerged pump and the seat ring are realized through the 60-DEG taper angle matching;
the well cover is installed, the pressing plate and the sealing gasket are fixed on the well cover, and the lifting-preventing ring is sleeved to press and lock the submersible electric pump through the screw rod, so that the phenomenon of lifting, rotating, tilting and the like of the submersible electric pump can be effectively prevented;
The cable sealing tube is provided with the direct contact of isolation conveying medium and the cable, and meanwhile, the sealing gasket, the O-shaped sealing ring and the wire outlet tube sealing gasket can be effectively sealed, so that the external conveying medium is prevented from entering the cable sealing tube through the matching surface and the gap, and the cable is effectively protected.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the overall structure of a cable protection and unit lifting prevention combined device for a submersible electric pump;
FIG. 2 is a schematic view of the internal structure of a cable gland according to the present invention;
FIG. 3 is a schematic view of the internal structure of the combination mechanism in the invention.
In the figure, 1, a sealing pipe, 2, an O-shaped sealing ring, 3, a compression ring, 4, a sealing seat, 5, a screw, 6, a pressing plate, 7, a sealing gasket, 8, a well cover, 9, an anti-lifting ring, 10, a wire outlet pipe sealing gasket, 11, a sealing flange, 12, a first bolt, 13, a second bolt, 14, a third bolt, 16, a seat ring, 17, a first cylinder, 18, a submerged electric pump, 19, a foundation flange, 20, a reinforcing rib plate, 21, a cable sealing pipe, 22, a combined mechanism, 23, a main well cylinder, 24, a side well bore, 25, a lower flange, 26, a second cylinder, 27, a taper pipe, 28, a cable pipe, 29, a hanging plate and 30, and an upper flange.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, a cable protection and unit lifting prevention combined device for a submersible pump comprises a main shaft 23, a well cover 8, a submersible pump 18, a cable sealing tube 21 and a combined mechanism 22, wherein the submersible pump 18 is arranged in the main shaft 23, the cable sealing tube 21 is fixedly connected to the outlet end of the top of the submersible pump 18, the combined mechanism 22 is fixedly connected to the top of the cable sealing tube 21, the well cover 8 is fixedly arranged at the top of the main shaft 23, and the well cover 8 is fixedly connected with the combined mechanism 22;
The main well barrel 23 comprises a barrel I17, a seat ring 16 is fixedly welded at the bottom of the barrel I17, a 60-DEG cone angle is adopted by the seat ring 16, a submerged electric pump 18 is placed on the seat ring 16, the submerged electric pump 18 sits on the seat ring 16 by self gravity and has the functions of automatically centering, positioning and stabilizing a pump body, a foundation flange 19 and a reinforcing rib plate 20 are fixedly welded outside the barrel I17, the foundation flange 19 is positioned above the reinforcing rib plate 20, and a side well barrel 24 is fixedly arranged on one side of the barrel I17.
The cable sealing tube 21 comprises a cable tube 28, hanging plates 29 are fixedly arranged at two ends of the top of the cable tube 28, an upper flange 30 is arranged at the top of the cable tube 28, a taper tube 27 is fixedly arranged at the bottom of the cable tube 28, a cylinder body II 26 is fixedly arranged at the bottom of the taper tube 27, a lower flange 25 is fixedly arranged at the bottom of the cylinder body II 26, the lower flange 25 is fixedly connected with a flange on the electric submerged pump 18, and a top outlet end of the electric submerged pump 18 is inserted into the cylinder body II 26 and the taper tube 27.
The combined mechanism 22 comprises a sealing tube 1, a compression ring 3, a sealing seat 4, a pressing plate 6, a sealing flange 11, a first bolt 12, a second bolt 13 and a third bolt 14, wherein the pressing plate 6 is fixedly arranged on the well cover 8, the sealing seat 4 is fixedly connected to the upper side of the pressing plate 6 through the first bolt 12, the sealing seat 4 is of a Z-shaped structure, the compression ring 3 is fixedly connected to the upper side of the sealing seat 4 through the third bolt 14, the second bolt 13 is vertically arranged at one end, close to the sealing tube 1, of the pressing plate 6, the sealing flange 11 is arranged at the lower end of the sealing tube 1, the sealing flange 11 is connected with the upper flange 30 through the second bolt 13, the second bolts 13 are locked through screw rods 5, 4-6 screws 5 are circumferentially arranged and are respectively located above the sealing flange 11 and the pressing plate 6, the screw rods 5 are tightly pressed by screw holes on the pressing plate 6 to prevent lifting of the pressing plate 9, and then the screw rods 5 are locked by nuts.
An O-shaped sealing ring 2 is arranged between the sealing seat 4 and the compression ring 3.
The second bolt 13 is sleeved with an anti-lifting pressing ring 9, and the anti-lifting pressing ring 9 is positioned below the pressing plate 6.
Sealing gaskets 7 are arranged between the pressing plate 6 and the sealing seat 4 and between the pressing plate and the well cover 8.
An outlet pipe sealing gasket 10 is arranged between the upper flange 30 and the sealing flange 11.
The assembly device comprises the following mounting steps:
Firstly, the top outlet end of a submerged motor pump 18 is fixedly connected with a cable sealing tube 21, firstly, the top outlet end of the submerged motor pump 18 is inserted into a cylinder body II 26 and a taper tube 27 and is fixed through a lower flange 25, the submerged motor pump 18 is lifted through a lifting lug, then the submerged motor pump 18 is located on a shaft seat ring 16, the seat ring 16 adopts a 60-DEG taper angle, the submerged motor pump 18 is located on the seat ring 16 by utilizing self gravity and has the functions of automatic centering, positioning and stabilizing a pump body, and the cable tube 28 is connected with a combined mechanism 22 through the sealing flange 11, an outlet tube sealing gasket 10, a bolt II 13 and an upper flange 30;
Step two, mounting the well cover 8 on the main shaft 23, fixing the pressing plate 6 and the sealing gasket 7 on the well cover 8, sleeving the anti-lifting ring 9 on the bolt II 13, and then compacting and locking the submerged electric pump 18 through the screw 5;
And step two, installing the sealing gasket 7 and the sealing seat 4 on the pressing plate 6, and sealing and compacting the pressing ring 3 and the sealing tube 1 through the O-shaped sealing ring 2 by using a bolt III 14.
The working principle of the invention is that the top outlet end of a submerged motor 18 is fixedly connected with a cable sealing tube 21, firstly the top outlet end of the submerged motor 18 is inserted into a cylinder II 26 and a taper tube 27 and is fixed through a lower flange 25, the submerged motor 18 is lifted through a lifting lug, then the submerged motor 18 is located on a shaft seat ring 16, the seat ring 16 adopts a 60 DEG taper angle, the submerged motor 18 is located on the seat ring 16 by self gravity and has the functions of automatic centering, positioning and stabilizing a pump body, the matching position of a guide vane body of the submerged motor and the seat ring is also designed into the 60 DEG taper angle and is provided with a sealing ring, thus when the submerged motor is installed, the submerged motor and the seat ring are automatically centered, positioned and sealed through the 60 DEG taper angle matching, and the cable tube 28 is connected with a combining mechanism 22 through a sealing flange 11, an outlet tube sealing gasket 10, a bolt II 13 and an upper flange 30;
the well cover 8 is arranged on the main shaft 23, then the pressing plate 6 and the sealing gasket 7 are fixed on the well cover 8, the anti-lifting pressing ring 9 is sleeved on the bolt II 13, and then the submerged electric pump 18 is tightly pressed and locked through the screw 5, so that the submerged electric pump 18 can be effectively prevented from lifting, rotating, tilting and other phenomena;
The cable sealing tube 21 is provided with the direct contact of isolation conveying medium and the cable, and meanwhile, the sealing gasket 7, the O-shaped sealing ring 2 and the outlet pipe sealing gasket 10 can be used for effectively sealing, so that the external conveying medium is prevented from entering the cable sealing tube 21 through the matching surface and the gap, and the cable is effectively protected.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010220383.9A CN111237205B (en) | 2020-03-25 | 2020-03-25 | A combined device for protecting cables and preventing the unit from lifting for a submersible electric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010220383.9A CN111237205B (en) | 2020-03-25 | 2020-03-25 | A combined device for protecting cables and preventing the unit from lifting for a submersible electric pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111237205A CN111237205A (en) | 2020-06-05 |
| CN111237205B true CN111237205B (en) | 2025-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010220383.9A Active CN111237205B (en) | 2020-03-25 | 2020-03-25 | A combined device for protecting cables and preventing the unit from lifting for a submersible electric pump |
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| CN (1) | CN111237205B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039012B (en) * | 2020-09-07 | 2021-11-26 | 德清博发智能科技有限公司 | Mechanical structure cable duct sealing device |
| CN118257733B (en) * | 2024-05-31 | 2024-08-06 | 浙江丰球克瑞泵业有限公司 | High-pressure submersible pump installation system and installation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211819966U (en) * | 2020-03-25 | 2020-10-30 | 合肥恒大江海泵业股份有限公司 | Cable protection and unit anti-lifting combined device for submersible electric pump |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8910718B2 (en) * | 2003-10-01 | 2014-12-16 | Schlumberger Technology Corporation | System and method for a combined submersible motor and protector |
| CA2645631A1 (en) * | 2007-11-30 | 2009-05-30 | Stellarton Technologies Inc. | Bottom hole hollow core electric submersible pumping system |
| CN201582143U (en) * | 2010-01-15 | 2010-09-15 | 衡阳市大力成泵业制造有限责任公司 | Cable lead-in sealing device for submerged electric pump |
| CN101936302B (en) * | 2010-09-07 | 2012-10-10 | 宁波巨神制泵实业有限公司 | Cable dry-type line-outgoing device of electric diving pump |
| CN104196764A (en) * | 2014-08-22 | 2014-12-10 | 江苏新格灌排设备有限公司 | Shaft type installation device for submersible electric pump in electromechanical irrigation pump station |
| RU172542U1 (en) * | 2017-02-15 | 2017-07-11 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | CORROSION PUMP UNIT PROTECTION DEVICE |
| CN107701489A (en) * | 2017-09-11 | 2018-02-16 | 合肥恒大江海泵业股份有限公司 | A kind of anti-lift device when being used for big-and-middle-sized submerged axial-flow pump operation |
| CN110285073B (en) * | 2019-06-27 | 2024-06-18 | 广州市昕恒泵业制造有限公司 | High-reliability submersible pump |
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2020
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211819966U (en) * | 2020-03-25 | 2020-10-30 | 合肥恒大江海泵业股份有限公司 | Cable protection and unit anti-lifting combined device for submersible electric pump |
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