CN114576173A - Simple self-exhausting efficient pipeline pump - Google Patents
Simple self-exhausting efficient pipeline pump Download PDFInfo
- Publication number
- CN114576173A CN114576173A CN202210041166.2A CN202210041166A CN114576173A CN 114576173 A CN114576173 A CN 114576173A CN 202210041166 A CN202210041166 A CN 202210041166A CN 114576173 A CN114576173 A CN 114576173A
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- motor
- ring
- pump
- impeller
- groove
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000003068 static effect Effects 0.000 claims abstract description 11
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 6
- 238000013022 venting Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 210000004907 gland Anatomy 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a simple self-exhaust high-efficiency pipeline pump which mainly comprises a pump body, a motor extension shaft, a backflow inhibiting structure assembly, a mechanical sealing structure, an impeller and a motor supporting frame, wherein the upper end of the pump body is connected with the motor supporting frame, the motor is installed at the upper end of the motor supporting frame, a cavity between the pump body and the motor supporting frame is a pump cavity, one end of the motor extension shaft is connected with the motor, the other end of the motor extension shaft extends into the pump cavity, the impeller is assembled at the end part of the motor extension shaft extending into the pump cavity and is positioned, the impeller is locked through an impeller nut, the mechanical sealing structure comprises a movable ring and a static ring, the movable ring is installed on an impeller hub, the static ring is installed on the motor supporting frame, and the backflow inhibiting structure assembly is installed between the impeller and the opposite position of the inner wall of the pump cavity. The motor support frame is simple and reasonable in structure, the motor support frame which is designed by integrating the functions of the exhaust, the pump cover and the sealing gland is simple to disassemble and convenient to maintain, the position of the impeller in the flow channel of the pump body is simple and convenient to adjust, and the service life of the pump is prolonged.
Description
Technical Field
The invention belongs to the technical field of fluid machinery, and particularly relates to a simple self-exhaust high-efficiency pipeline pump.
Background
The pipeline pump is a single-suction single-stage or multi-stage centrifugal pump, belongs to a vertical structure, and is named as a pipeline pump because the inlet and the outlet of the pipeline pump are on the same straight line, have the same caliber, are similar to a section of pipeline and can be arranged at any position of the pipeline. The existing pipeline pump product has complex structure, more required parts, great disassembly difficulty, larger clearance of an impeller wear ring and great leakage, so that the efficiency is lower and the energy consumption ratio is high; before driving, manually exhausting air; axial play cannot be eliminated by adjustment.
Disclosure of Invention
The invention solves the technical problem of providing a simple self-exhausting high-efficiency pipeline pump, which can better solve the defects, so that the pipeline pump is convenient to use and simple to disassemble, and the performance of the whole machine is further improved.
The technical scheme adopted by the invention is as follows: the utility model provides a simple from high-efficient tubing pump of exhaust, mainly includes the pump body, motor extension shaft, suppresses backflow structure subassembly, mechanical seal structure, impeller and motor support frame, and the motor support frame is connected to pump body upper end, and motor support frame upper end installation motor, cavity are the pump chamber between the pump body and the motor support frame, motor extension shaft one end is connected with the motor, and the other end stretches into in the pump chamber, the tip and the location of motor extension shaft in stretching into the pump chamber are assembled to the impeller, and the impeller passes through impeller nut locking, mechanical seal structure includes rotating ring and quiet ring, and the rotating ring is installed on impeller wheel hub, and quiet ring is installed on motor support frame, it installs between impeller and pump chamber inner wall relative position to suppress backflow structure subassembly. The motor lengthened shaft, the impeller and the mechanical seal moving ring form a whole, the axial displacement of the whole can be adjusted by only adjusting the position of the motor lengthened shaft, the purpose of adjusting the position of the impeller in a pump body flow passage can be achieved, the purpose of prolonging the service time of the mechanical seal can be achieved, and an ideal use effect is achieved.
Preferably, the motor supporting frame is a circular groove type structure, bolt holes are evenly distributed on the outer ring of the top surface of the groove body and are connected with a motor flange through bolts, bolt holes are processed on the outer ring surface of the lower part of the groove body and are fixedly connected with the pump body through bolts, the bottom of the motor supporting frame is of an unequal-height bottom surface structure, the middle part of the bottom of the motor supporting frame is a plane protruding towards the top surface of the tank body, the center of the bottom of the motor supporting frame is a shaft hole, a static ring groove is processed on the outer ring of the shaft hole, the height of the ring surface at the outer side part of the bottom of the tank is lower than that of the plane at the middle part of the bottom of the tank, the ring surface at the outer side part of the bottom of the tank is in transitional connection with the plane at the middle part of the bottom of the tank through a slope, the joint of the ring surface of the outer side part of the groove bottom and the slope surface is processed with a wear ring positioning groove, the cross section of the motor support frame is W-shaped, an exhaust passage is processed on one side of the bottom of the groove, one end of the exhaust passage is communicated with the pump cavity, the other end of the exhaust passage extends out of the motor support frame, and the end part is processed with threads and is provided with an electric ball valve.
The effect is as follows: the motor support frame is cast and formed integrally, the structure of the motor support frame integrates the functions of exhaust, the pump cover and the sealing gland, the disassembly is simple, and the maintenance is convenient. The electric ball valve is arranged at the exhaust position, manual control is not needed, the exhaust operation before starting can be carried out through the control cabinet, and the starting process is simplified.
Preferably, restrain backward flow structure subassembly and include that levogyration spiral holds and grinds ring and dextrorotation spiral and hold and grind the ring, levogyration spiral holds and grinds ring and dextrorotation spiral and holds and grind the ring and be fixed in the impeller through holding screw on, when the motor is clockwise rotation's the condition, levogyration spiral holds and grinds the ring and is located between impeller front shroud and the pump body, dextrorotation spiral holds and grinds the ring and is held between the ring constant head tank that grinds of impeller back shroud and motor support frame.
The effect is as follows: the bearing and grinding ring is used as a bearing and grinding part to protect the pump body and the impeller, certain coaxiality can be maintained, the spiral direction of the bearing and grinding ring is related to the rotating direction of the motor, the spiral direction of the bearing and grinding ring at the front cover plate of the impeller is opposite to that of the bearing and grinding ring at the rear cover plate of the impeller, leakage amount is reduced, and the efficiency of the pump is improved. Meanwhile, because the front cover plate side and the rear cover plate side of the pump are provided with pressure, the spiral sealing ring and the impeller rotate to generate a force opposite to the side pressure direction of the cover plate, and the forces in the two directions can increase the radial force within the length range of the wear-bearing ring, the wear-bearing ring can also play a role of a hydrostatic bearing, the clearance between the wear-bearing ring and the pump body and the motor support frame is reduced, the wear is not easy to occur, and the service life of the pump is prolonged.
Preferably, a gasket is arranged between the motor support frame and the motor flange.
The effect is as follows: the impeller is positioned on the motor lengthened shaft, the mechanical seal is adjusted by the impeller hub, the compression amount of the mechanical seal can be adjusted by adjusting the gasket between the motor and the motor support frame, the operation is simple and convenient, the service life of the seal is prolonged, and when the open impeller is used, the axial gap can be adjusted without disassembling the motor support frame, so that the equipment maintenance flow is simplified.
Preferably, the lower portion of the pump body is filled with a vibration isolation material, and the vibration isolation material is generally an elastic material such as rubber.
The effect is as follows: reduce the vibration of the pump body and prolong the service life of the pump.
Preferably, the outer side wall of the ring body of the left-handed spiral wear-bearing ring is provided with a left-handed spiral groove, the outer side wall of the ring body of the right-handed spiral wear-bearing ring is provided with a right-handed spiral groove, and the cross sections of the left-handed spiral groove and the right-handed spiral groove are circular, square or triangular.
The effect is that: can prevent backflow.
The invention has the beneficial effects that: the motor support frame is simple and reasonable in structure, the motor support frame is designed by integrating the functions of air exhaust, the pump cover and the sealing gland, the number of parts is effectively reduced, the motor support frame is simple to disassemble and convenient to maintain, the position of the impeller in a flow channel of the pump body is simple and convenient to adjust, and the service life of the pump is prolonged.
Drawings
FIG. 1 is a schematic diagram of a simple self-venting high efficiency pump;
FIG. 2 is a schematic view of a motor support frame;
FIG. 3 is a schematic cross-sectional view of a circular groove wear ring;
FIG. 4 is a schematic cross-sectional view of a square groove grinding ring;
FIG. 5 is a schematic cross-sectional view of a triangular groove grinding ring;
FIG. 6 is a schematic view of a spiral groove structure of the wear ring;
fig. 7 is a partial enlarged view of the gasket.
Reference numerals: 1-a pump body, 2-a left-handed spiral wear-bearing ring, 3-an impeller, 4-a right-handed spiral wear-bearing ring, 5-a motor support frame, 6-an electric ball valve, 7-a motor extension shaft, 8-a mechanical sealing structure, 9-a motor, 10-vibration isolation materials, 11-a set screw, 12-a gasket, 51-a groove bottom middle part, 52-a slope surface, 53-a groove bottom outer side part, 54-an exhaust channel, 55-a static ring groove, 56-a wear-bearing ring positioning groove and 201-a left-handed spiral groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in figure 1, a simple self-exhaust high-efficiency pipeline pump mainly comprises a pump body 1, a motor 9, a motor extension shaft 7, a backflow inhibiting structure component, a mechanical sealing structure 8, an impeller 3 and a motor support frame 5, wherein the upper end of the pump body 1 is connected with the motor support frame 5, the motor 9 is installed at the upper end of the motor support frame 5, a vibration isolation material 10 is filled at the lower part of the pump body 1, a cavity between the pump body 1 and the motor support frame 5 is a pump cavity, one end of the motor extension shaft 7 is connected with the motor 9, the other end of the motor extension shaft extends into the pump cavity, the impeller 3 is assembled at the end part of the motor extension shaft 7 extending into the pump cavity and is positioned, the impeller 3 is locked through an impeller nut, the mechanical sealing structure 8 comprises a moving ring and a static ring, the moving ring is installed on a hub of the impeller 3, the moving ring rotates along with the impeller 3, the static ring is fixedly installed in a static ring groove 55 of the motor support frame 5, as shown in figures 1 and 3, the backflow inhibiting structure component comprises a left-handed spiral bearing grinding ring 2 and a right-handed spiral bearing grinding ring 4, the left-handed screw grinding ring 2 and the right-handed screw grinding ring 4 are fixed on the impeller 3 through the set screw 12, when the motor 9 is in clockwise rotation, the left-handed screw grinding ring 2 is positioned between the front cover plate of the impeller 3 and the pump body 1, and the right-handed screw grinding ring 4 is positioned between the rear cover plate of the impeller 3 and the grinding ring positioning groove 56 of the motor support frame 5. As shown in fig. 3 to 6, a left-handed spiral groove 201 is formed on the outer side wall of the ring body of the left-handed spiral wear-bearing ring 2, a right-handed spiral groove is formed on the outer side wall of the ring body of the right-handed spiral wear-bearing ring 4, the shape and structure of the right-handed spiral groove are the same as those of the left-handed spiral groove 201, and the difference is that the spiral directions are opposite. The cross sections of the left-handed spiral groove 201 and the right-handed spiral groove are circular, square or triangular. The spiral groove structure of the wear-bearing ring enables the impeller 3 to form reverse circulation at the position of the wear-bearing ring after rotating, so that liquid in a high-pressure area is prevented from flowing to a low-pressure area, and leakage is reduced.
The motor lengthened shaft 7, the impeller 3 and the moving ring in the mechanical sealing structure 8 form a whole, and the axial displacement of the whole can be adjusted by adjusting the position of the motor lengthened shaft 7, so that the aim of adjusting the position of the impeller 3 in a pump body flow passage can be fulfilled, and the service life of the mechanical sealing structure can be prolonged. As shown in fig. 7, the adjustment of the overall axial play amount is mainly performed by a spacer 12 installed between the motor support bracket 5 and the flange of the motor 9. The mechanical seal compression amount is adjusted by adjusting the gasket 12 between the motor 9 and the motor support frame 5, when the open impeller is used, the axial gap can be adjusted without detaching the motor support frame 5, the gasket 12 is added, the mechanical seal compression amount is increased, the abrasion loss is filled, and the purpose of prolonging the service life is achieved.
As shown in figure 2, the motor support frame 5 is a circular groove type structure, bolt holes are evenly distributed on the outer ring of the top surface of the groove body and are connected with a flange of the motor 9 through bolts, bolt holes are processed on the outer ring surface of the lower part of the groove body and are fixedly connected with the pump body 1 through bolts, the groove bottom of the motor support frame 5 is a structure with unequal heights on the bottom surface, the middle part 51 of the groove bottom is a plane protruding towards the top surface of the groove body, the center is a shaft hole, a static ring groove 55 is processed on the outer ring surface of the shaft hole, the height of the ring surface of the outer side part 53 of the groove bottom is lower than that of the plane of the middle part 51 of the groove bottom, the ring surface of the outer side part 53 of the groove bottom is in transitional connection with the plane of the middle part 51 of the groove bottom through a slope surface 52, a wear-bearing ring positioning groove 56 is processed at the joint of the ring surface of the outer side part 53 of the groove bottom and the slope surface 52, the cross section of the motor support frame 5 is W-shaped, an exhaust passage 54 is processed on one side of the groove, one end of the exhaust passage 54 is communicated with the pump cavity, and the other end extends out of the motor support frame 5, the end is threaded and fitted with a motorized ball valve 6.
The above description is the specific embodiment of the present invention and the technical principle applied, and any modification and equivalent transformation based on the technical solution of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a simple from high-efficient tubing pump of exhaust which characterized in that: the pump mainly comprises a pump body, a motor lengthened shaft, a backflow inhibiting structure assembly, a mechanical sealing structure, an impeller and a motor supporting frame, wherein the motor supporting frame is connected to the upper end of the pump body, the motor is installed at the upper end of the motor supporting frame, a cavity between the pump body and the motor supporting frame is a pump cavity, one end of the motor lengthened shaft is connected with the motor, the other end of the motor lengthened shaft stretches into the pump cavity, the impeller is assembled at the end part of the motor lengthened shaft stretching into the pump cavity and positioned, the impeller is locked through an impeller nut, the mechanical sealing structure comprises a movable ring and a static ring, the movable ring is installed on an impeller hub, the static ring is installed on the motor supporting frame, and the backflow inhibiting structure assembly is installed between the relative positions of the impeller and the inner wall of the pump cavity.
2. A simple self-venting high efficiency pump in accordance with claim 1, wherein: the motor supporting frame is of a circular groove type structure, bolt holes are evenly distributed on the outer ring of the top surface of the groove body and are connected with a motor flange through bolts, bolt holes are processed on the outer ring surface of the lower part of the groove body and are fixedly connected with the pump body through bolts, the bottom of the motor supporting frame is of an unequal-height bottom surface structure, the middle part of the bottom of the motor supporting frame is a plane protruding towards the top surface of the tank body, the center of the bottom of the motor supporting frame is a shaft hole, a static ring groove is processed on the outer ring of the shaft hole, the height of the ring surface at the outer side part of the bottom of the tank is lower than that of the plane at the middle part of the bottom of the tank, the ring surface at the outer side part of the bottom of the tank is in transitional connection with the plane at the middle part of the bottom of the tank through a slope, the joint of the ring surface of the outer side part of the groove bottom and the slope surface is processed with a wear ring positioning groove, the cross section of the motor support frame is W-shaped, an exhaust passage is processed on one side of the bottom of the groove, one end of the exhaust passage is communicated with the pump cavity, the other end of the exhaust passage extends out of the motor support frame, and the end part is processed with threads and is provided with an electric ball valve.
3. A simple self-venting high efficiency pump in accordance with claim 2, wherein: restrain backward flow structural component and include that levogyration spiral holds and grinds ring and dextrorotation spiral and hold and grind the ring, levogyration spiral holds and grinds ring and dextrorotation spiral and holds and grind the ring and be fixed in the impeller through holding screw on, when the motor is the condition of clockwise rotation, levogyration spiral holds and grinds the ring and is located between the impeller front shroud and the pump body, dextrorotation spiral holds and grinds the ring and grinds between the ring constant head tank in the holding of impeller back shroud and motor support frame.
4. A simple self-venting high efficiency pipe pump as claimed in claim 2, wherein: and a gasket is arranged between the motor support frame and the motor flange.
5. A simple self-venting high efficiency pump in accordance with claim 1, wherein: and the lower part of the pump body is filled with vibration isolation materials.
6. A simple self-venting high efficiency pump in accordance with claim 3, wherein: the outer side wall of the ring body of the left-handed spiral wear-bearing ring is provided with a left-handed spiral groove, the outer side wall of the ring body of the right-handed spiral wear-bearing ring is provided with a right-handed spiral groove, and the cross sections of the left-handed spiral groove and the right-handed spiral groove are circular, square or triangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041166.2A CN114576173B (en) | 2022-01-14 | 2022-01-14 | Simple self-exhaust efficient pipeline pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041166.2A CN114576173B (en) | 2022-01-14 | 2022-01-14 | Simple self-exhaust efficient pipeline pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114576173A true CN114576173A (en) | 2022-06-03 |
| CN114576173B CN114576173B (en) | 2024-01-09 |
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ID=81769594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210041166.2A Active CN114576173B (en) | 2022-01-14 | 2022-01-14 | Simple self-exhaust efficient pipeline pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114576173B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6250889B1 (en) * | 1999-01-26 | 2001-06-26 | Godwin Pumps Limited | Pump with improved priming |
| CN102220984A (en) * | 2011-07-22 | 2011-10-19 | 李冬庆 | Single stage pump with forced circulation rotation-preventing structure |
| CN202326282U (en) * | 2011-12-09 | 2012-07-11 | 浙江佳力科技股份有限公司 | Vertical type pipeline pump |
| CN205025776U (en) * | 2015-09-24 | 2016-02-10 | 普仑斯(福建)泵业有限公司 | Vertical tubing pump of anti -corrosion type |
| CN206545604U (en) * | 2017-02-20 | 2017-10-10 | 浙江佳力科技股份有限公司 | A kind of detachable Piping Centrifugal Pumps with integrated mechanical sealing |
| CN211525106U (en) * | 2019-12-07 | 2020-09-18 | 江苏五奥机泵制造有限公司 | High-efficiency energy-saving pipeline pump |
| CN211648584U (en) * | 2019-12-13 | 2020-10-09 | 上海东方泵业集团南通有限公司 | Mechanical seal self-flushing pump cover structure of pipeline pump |
| CN212838397U (en) * | 2020-08-19 | 2021-03-30 | 福斯流体技术(广州)有限公司 | Flow guide type pipeline pump |
-
2022
- 2022-01-14 CN CN202210041166.2A patent/CN114576173B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6250889B1 (en) * | 1999-01-26 | 2001-06-26 | Godwin Pumps Limited | Pump with improved priming |
| CN102220984A (en) * | 2011-07-22 | 2011-10-19 | 李冬庆 | Single stage pump with forced circulation rotation-preventing structure |
| CN202326282U (en) * | 2011-12-09 | 2012-07-11 | 浙江佳力科技股份有限公司 | Vertical type pipeline pump |
| CN205025776U (en) * | 2015-09-24 | 2016-02-10 | 普仑斯(福建)泵业有限公司 | Vertical tubing pump of anti -corrosion type |
| CN206545604U (en) * | 2017-02-20 | 2017-10-10 | 浙江佳力科技股份有限公司 | A kind of detachable Piping Centrifugal Pumps with integrated mechanical sealing |
| CN211525106U (en) * | 2019-12-07 | 2020-09-18 | 江苏五奥机泵制造有限公司 | High-efficiency energy-saving pipeline pump |
| CN211648584U (en) * | 2019-12-13 | 2020-10-09 | 上海东方泵业集团南通有限公司 | Mechanical seal self-flushing pump cover structure of pipeline pump |
| CN212838397U (en) * | 2020-08-19 | 2021-03-30 | 福斯流体技术(广州)有限公司 | Flow guide type pipeline pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114576173B (en) | 2024-01-09 |
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