CN113803243A - Multistage water pump machine seals from cooling device - Google Patents
Multistage water pump machine seals from cooling device Download PDFInfo
- Publication number
- CN113803243A CN113803243A CN202110932385.5A CN202110932385A CN113803243A CN 113803243 A CN113803243 A CN 113803243A CN 202110932385 A CN202110932385 A CN 202110932385A CN 113803243 A CN113803243 A CN 113803243A
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- CN
- China
- Prior art keywords
- cooling
- self
- cleaning
- pipe
- water pump
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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
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
Abstract
The invention discloses a multistage water pump machine seal self-cooling device, and relates to the field of water pumps. The invention realizes the automatic circulating water cooling function of the mechanical seal by utilizing the water pressure difference action at the two ends of the water pump, simultaneously realizes the buffer function of cooling water liquid by utilizing the energy conversion action, avoids no cooling in the high-speed operation process of the mechanical seal, and avoids the parts such as the seal, a carbon ring and the like from being damaged by heating, realizes the scraping and cleaning function of the self-cooling outlet pipe and the self-cooling inlet pipe by matching with the water pressure through the structural arrangement of the cleaning wheel and the side wall cleaning ring, and simultaneously realizes the vibration cleaning function of the self-cooling through pipe by the collision and vibration action of the cleaning wheel and the self-cooling through pipe inner pipe, thereby ensuring the flow of the cooling water in the inner part under the condition of frequently replacing the guide pipe.
Description
Technical Field
The invention relates to the technical field of water pumps, in particular to a multi-stage water pump self-cooling device.
Background
In life, chemical production is indispensable, and in the production process of liquid raw materials, the water pump has played the effect of carrying liquid and providing the pressure and the flow of chemical reaction, if the water pump breaks down, often makes whole system stop work. Therefore, the action of the pump is compared with the heart in the chemical production process flow, and meanwhile, the normal operation of the production is directly influenced by the quality of the pump, so that the pump is one of key equipment in the chemical and petroleum departments.
In the traditional water pump machine sealing device, the pump body originally adopts a packing sealing form, the operation reliability of the sealing pump body is not high, the water leakage situation often occurs, if the machine sealing form is caused, the arrangement of a field cooling water pipeline can be limited, the replaced machine sealing is not cooled by cooling water, and once the machine sealing is not cooled for a long time, the O-shaped ring inside the machine sealing is heated and loses efficacy, and the leakage occurs.
In order to solve the problems, a multistage water pump machine sealing self-cooling device is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a multi-stage water pump machine sealing self-cooling device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-stage pump mechanical seal self-cooling device comprises:
the water pump comprises a water pump base, wherein a water pump is fixedly installed at the top end of the water pump base, a first sealing block is fixedly installed at the driving end of the water pump, and a second sealing block is fixedly installed at one side, far away from the driving end, of the water pump;
the water-cooling circulating device is used for performing circulating water-cooling action on the double-end machine seal and is arranged between the side walls of the first machine seal block and the second machine seal block;
the bullet bumps cleaning device for vibrate the water-cooling circulating device inner wall and scrape the two-way clear bullet of brush and bump cleaning device set up in water-cooling circulating device's inside.
Preferably, water-cooling circulating device includes from cold inlet tube, from cold siphunculus, from cold outlet pipe, entry stopper, export stopper, first stretch cord, second stretch cord, from cold inlet tube fixed mounting in the lateral wall of first machine seal piece, from cold siphunculus fixed mounting in the other end of self-cold inlet tube, from cold outlet pipe fixed mounting in from cold siphunculus with between the lateral wall of second machine seal piece, entry stopper fixed mounting in the interface end of self-cold inlet tube, export stopper fixed mounting in the interface end of self-cold outlet pipe, first stretch cord fixed mounting in the inside keeping away from of self-cold inlet tube the one end of entry stopper, second stretch cord fixed mounting in the lateral wall of export stopper.
Preferably, the bullet bumps cleaning device includes swivel becket, connecting rod, lateral wall clearance ring sum clearance wheel, set up in from the inside swivel becket of cold outlet with carry out fixed connection between the second stretch cord, set up in from the inside swivel becket of cold inlet with carry out fixed connection between the first stretch cord, the connecting rod with rotate between the inside wall of swivel becket and be connected, lateral wall clearance ring fixed mounting in the lateral wall of connecting rod, clearance wheel fixed mounting in the both ends lateral wall of connecting rod.
Preferably, the self-cooling inlet pipe, the self-cooling through pipe and the self-cooling outlet pipe are connected in a penetrating manner, and the self-cooling inlet pipe, the self-cooling through pipe and the self-cooling outlet pipe are located on the same horizontal plane.
Preferably, the inlet limiting block and the outlet limiting block are the same in shape, and the diameter of the through hole of the inlet limiting block and the diameter of the through hole of the outlet limiting block are smaller than that of the cleaning wheel.
Preferably, two lateral wall clearance ring about the horizontal end axis of connecting rod carries out the symmetry and sets up, two lateral wall clearance ring with do not take place the contact between the rotating ring, the lateral wall cover of lateral wall clearance ring is equipped with clean brush, clean brush centers on the lateral wall of lateral wall clearance ring sets up, clean brush's outside wall can with laminate between the inner wall from cold inlet pipe and self-cooling outlet pipe.
Preferably, the diameter of the rotating ring is the same as the diameter of the connecting rod, and the diameter of the rotating opening of the rotating ring is the same as the diameter of the rotating connecting end of the connecting rod.
Preferably, two the cleaning wheel about the horizontal end axis of connecting rod carries out the symmetry and sets up, the cleaning wheel adopts the structure setting of protruding scraping wheel, the protruding front end cross-section of protruding scraping wheel adopts the structure setting of inclining inwards, the lateral wall of cleaning wheel with laminate between the inner wall from cold inlet pipe and self-cooling outlet pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes the automatic circulating water cooling function of the mechanical seal by utilizing the water pressure difference function at the two ends of the water pump through the matching action among the water pump, the self-cooling inlet pipe, the self-cooling through pipe, the self-cooling outlet pipe and the cleaning wheel, and simultaneously realizes the buffer function of cooling water liquid through the structural arrangement of the cleaning wheel by utilizing the energy conversion function, thereby avoiding no cooling in the high-speed operation process of the mechanical seal, and the damage of parts such as the seal, the carbon ring and the like caused by heating.
2. According to the invention, through the structural arrangement of the cleaning wheel and the side wall cleaning ring, the scraping and cleaning functions of the interiors of the self-cooling outlet pipe and the self-cooling inlet pipe are realized by matching with water impact, and meanwhile, the vibration cleaning function of the inner pipe of the self-cooling through pipe is realized through the collision and vibration effects of the cleaning wheel and the inner pipe of the self-cooling through pipe, so that the flow of cooling water in the interior is ensured under the condition that the pipe is replaced frequently.
Drawings
Fig. 1 is a schematic overall structural diagram of a multistage water pump self-cooling device according to the present invention;
fig. 2 is a schematic structural view of a self-cooling pipe of a multi-stage water pump self-cooling device according to the present invention;
fig. 3 is a schematic internal structural diagram of a self-cooling inlet pipe and a self-cooling outlet pipe of a multi-stage water pump self-cooling device provided by the present invention;
FIG. 4 is a schematic diagram of a spring-catch cleaning device of a multi-stage pump-cooling self-cooling device according to the present invention;
FIG. 5 is a schematic view of an internal structure of a spring-catch cleaning device of a multi-stage pump-cooling self-cooling device according to the present invention;
fig. 6 is a schematic diagram of a disassembled structure of an internal connection end of the bumping cleaning device of the multi-stage water pump self-cooling device.
In the figure: 1. a water pump base; 2. a water pump; 21. a first sealing block; 22. a second machine seal block; 3. a self-cooling inlet tube; 31. self-cooling through pipes; 32. a self-cooling outlet pipe; 33. an inlet stopper; 34. an outlet stopper; 35. a first elastic cord; 36. a second elastic cord; 4. a rotating ring; 41. a connecting rod; 42. a side wall cleaning ring; 43. and cleaning the wheels.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 6, a multistage pumping machine self-cooling device includes:
the water pump comprises a water pump base 1, wherein a water pump 2 is fixedly installed at the top end of the water pump base 1, a first sealing block 21 is fixedly installed at the driving end of the water pump 2, and a second sealing block 22 is fixedly installed at one side, far away from the driving end, of the water pump 2;
the water-cooling circulating device is used for performing circulating water-cooling action on the double-end machine seal and is arranged between the side walls of the first machine seal block 21 and the second machine seal block 22;
and the elastic collision cleaning device is used for vibrating the inner wall of the water-cooling circulating device and scraping and brushing the two-way clean elastic collision cleaning device arranged in the water-cooling circulating device.
Water-cooling circulating device includes from cold inlet tube 3, from cold siphunculus 31, from cold outlet pipe 32, entry stopper 33, export stopper 34, first stretch cord 35, second stretch cord 36, from cold inlet tube 3 fixed mounting is in the lateral wall of first quick-witted seal piece 21, from cold siphunculus 31 fixed mounting is in the other end of self-cold inlet tube 3, from cold outlet pipe 32 fixed mounting is between the lateral wall of self-cold siphunculus 31 and second machine seal piece 22, entry stopper 33 fixed mounting is in the interface end of self-cold inlet tube 3, export stopper 34 fixed mounting is in the interface end of self-cold outlet pipe 32, first stretch cord 35 fixed mounting is in the inside one end of keeping away from entry stopper 33 of self-cold inlet tube 3, second stretch cord 36 fixed mounting is in the lateral wall of export stopper 34.
Bump cleaning device includes swivel 4, connecting rod 41, lateral wall clearance ring 42 and clearance wheel 43, set up and carry out fixed connection between swivel 4 and the second stretch cord 36 inside from cold outlet pipe 32, set up and carry out fixed connection between swivel 4 and the first stretch cord 35 inside from cold inlet tube 3, rotate between the inside wall of connecting rod 41 and swivel 4 and be connected, lateral wall clearance ring 42 fixed mounting is in the lateral wall of connecting rod 41, clearance wheel 43 fixed mounting is in the both ends lateral wall of connecting rod 41.
The self-cooling inlet pipe 3, the self-cooling through pipe 31 and the self-cooling outlet pipe 32 are connected in a penetrating manner, and the self-cooling inlet pipe 3, the self-cooling through pipe 31 and the self-cooling outlet pipe 32 are located on the same horizontal plane.
The inlet stopper 33 and the outlet stopper 34 have the same shape, and the diameter of the through hole between the inlet stopper 33 and the outlet stopper 34 is smaller than that of the cleaning wheel 43.
Two lateral wall clearance rings 42 carry out the symmetry about connecting rod 41's horizontal end axis and set up, do not take place the contact between two lateral wall clearance rings 42 and the rotating ring 4, and the lateral wall cover of lateral wall clearance ring 42 is equipped with clean brush, and clean brush sets up around the lateral wall of lateral wall clearance ring 42, and the outside wall of clean brush can laminate between the inner wall of self-cooling inlet tube 3 and self-cooling outlet pipe 32.
The diameter of the rotating ring 4 is the same as that of the connecting rod 41, and the diameter of the rotating opening of the rotating ring 4 is the same as that of the rotating connection end of the connecting rod 41.
Two cleaning wheels 43 are symmetrically arranged about the central axis of the transverse end of the connecting rod 41, the cleaning wheels 43 are arranged in a convex scraping wheel structure, the cross section of the front end of the convex scraping wheel is arranged in an inward inclining structure, and the side wall of each cleaning wheel 43 is attached to the inner wall of the self-cooling inlet pipe 3 and the inner wall of the self-cooling outlet pipe 32.
The specific working principle of the invention is as follows:
according to the illustration in fig. 1, knowing that the pressure at the driving end of the water pump is lower than the pressure at the non-driving end (the outlet pressure of the pump body is 1.5 to 2.0MP, the static pressure of the water column of the inlet pressure is 0.5MPa), that is, the pressure at the end of the second sealing block 22 is higher than the pressure at the end of the first sealing block 21, because the self-cooling inlet pipe 3, the self-cooling pipe 31 and the self-cooling outlet pipe 32 are connected in a side wall conduction manner, through the differential water pressure between the end of the second sealing block 22 and the end of the first sealing block 21, according to the illustration in fig. 2, part of the water inside the water pump enters through the self-cooling outlet pipe 32, during the entering process, the cleaning wheel 43 is started to be pushed to rotate towards the end of the self-cooling pipe 31 along the inner pipe of the self-cooling outlet pipe 32, as illustrated in fig. 3, because the cleaning wheels 43 at both ends are arranged, after the cooling water at the faster water enters into the self-cooling outlet pipe 32, the self-cooling inlet pipe 31 and the self-cooling inlet pipe 3 to move, because the side wall of the cleaning wheel 43 is arranged in a structure of a scraping wheel, when the water liquid impacts the cleaning wheels 43, the impact force of the cooling water liquid is partially converted into the kinetic energy of the two cleaning wheels 43, so that the buffer function of the cooling water liquid entering the water pipe is realized, and the situation that the machine seal is abraded by water under the action of water pressure when the machine seal is cooled by the water liquid flushed out at high speed is avoided;
in the process, the automatic circulating water cooling function of the mechanical seal is realized through the water pressure difference action at the two ends of the water pump 2, meanwhile, the buffer function of cooling water liquid is realized through the structural arrangement of the cleaning wheel 43 by utilizing the energy conversion action, and the problems that the mechanical seal is not cooled in the high-speed operation process, and the sealing part, the carbon ring part and the like are damaged by heating are avoided.
Meanwhile, as can be seen from fig. 3 and 5, since the sidewall of the cleaning wheel 43 is provided with the convex scraping wheel, and the cross section of the convex front end of the convex scraping wheel is provided with the inward-inclined structure, the cleaning wheel 43 is driven by the cooling water to rotate inward and the sidewall is cleaned, since the sidewall of the connecting rod 41 is fixedly provided with the sidewall cleaning ring 42, the sidewall of the sidewall cleaning ring 42 is sleeved with the cleaning brush, while the cleaning wheel 43 rotates, the sidewall cleaning ring 42 cleans the upper and lower ends of the inner walls of the self-cooling outlet pipe 32 and the self-cooling inlet pipe 3, when the cleaning wheel 43 inside the self-cooling outlet pipe 32 moves to impact the inner wall of the self-cooling inlet pipe 31 along with the water pressure, the dirt inside the wall of the self-cooling inlet pipe 31 is cleaned under the vibration force and the water impact force, thereby preventing the self-cooling inlet pipe 3 from being damaged by the vibration effect generated when the cleaning wheel 43 moves to impact force, The accumulation of dirt at the inner pipe parts of the self-cooling through pipe 31 and the self-cooling outlet pipe 32 reduces the flow rate of cooling water liquid, so that the cooling effect is reduced, and due to the arrangement of the first elastic rope 35 and the second elastic rope 36, when the self-cooling through pipe is not used, the water resistance of the residual water liquid is smaller than the elastic action of the first elastic rope 35 and the second elastic rope 36 due to the disappearance of water impact force, so that the first elastic rope 35 and the second elastic rope 36 drive the corresponding cleaning wheel 43 to perform return motion;
in the process, the cleaning wheel 43 and the side wall cleaning ring 42 are structurally arranged, the scraping and cleaning functions of the inner parts of the self-cooling outlet pipe 32 and the self-cooling inlet pipe 3 are realized by matching with water impact, and the vibration and cleaning functions of the inner pipe of the self-cooling through pipe 31 are realized by the collision and vibration effects of the cleaning wheel 43 and the inner pipe of the self-cooling through pipe 31, so that the flow of cooling water in the inner part is ensured under the condition that the pipe is replaced from time to time.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A multi-stage pump mechanical seal self-cooling device comprises:
the water pump comprises a water pump base (1), wherein a water pump (2) is fixedly installed at the top end of the water pump base (1), a first mechanical seal block (21) is fixedly installed at the driving end of the water pump (2), and a second mechanical seal block (22) is fixedly installed on one side, far away from the driving end, of the water pump (2);
the water-cooling circulating device is used for performing circulating water cooling on the double-end machine seal and is arranged between the side walls of the first machine seal block (21) and the second machine seal block (22);
the bullet bumps cleaning device for vibrate the water-cooling circulating device inner wall and scrape the two-way clear bullet of brush and bump cleaning device set up in water-cooling circulating device's inside.
2. The self-cooling device for the multi-stage water pump machine of claim 1, wherein the water-cooling circulation device comprises a self-cooling inlet pipe (3), a self-cooling pipe (31), a self-cooling outlet pipe (32), an inlet limiting block (33), an outlet limiting block (34), a first elastic rope (35) and a second elastic rope (36), the self-cooling inlet pipe (3) is fixedly installed on the side wall of the first machine sealing block (21), the self-cooling pipe (31) is fixedly installed at the other end of the self-cooling inlet pipe (3), the self-cooling outlet pipe (32) is fixedly installed between the self-cooling pipe (31) and the side wall of the second machine sealing block (22), the inlet limiting block (33) is fixedly installed at the interface end of the self-cooling inlet pipe (3), and the outlet limiting block (34) is fixedly installed at the interface end of the self-cooling outlet pipe (32), the first elastic rope (35) is fixedly installed at one end, far away from the inlet limiting block (33), of the interior of the self-cooling inlet pipe (3), and the second elastic rope (36) is fixedly installed on the side wall of the outlet limiting block (34).
3. The self-cooling device for the multi-stage water pump seal of claim 2, wherein the bumping cleaning device comprises a rotating ring (4), a connecting rod (41), a side wall cleaning ring (42) and a cleaning wheel (43), the rotating ring (4) disposed inside the self-cooling outlet pipe (32) is fixedly connected with the second elastic rope (36), the rotating ring (4) disposed inside the self-cooling inlet pipe (3) is fixedly connected with the first elastic rope (35), the connecting rod (41) is rotatably connected with the inner side wall of the rotating ring (4), the side wall cleaning ring (42) is fixedly mounted on the side wall of the connecting rod (41), and the cleaning wheel (43) is fixedly mounted on the side wall of both ends of the connecting rod (41).
4. The self-cooling device of the multistage water pump unit as claimed in claim 1, wherein the self-cooling inlet pipe (3), the self-cooling through pipe (31) and the self-cooling outlet pipe (32) are connected in series, and the self-cooling inlet pipe (3), the self-cooling through pipe (31) and the self-cooling outlet pipe (32) are located on the same horizontal plane.
5. The self-cooling device for the multistage water pump unit as claimed in claim 3, wherein the inlet stopper (33) and the outlet stopper (34) are identical in shape, and the diameters of the through holes of the inlet stopper (33) and the outlet stopper (34) are smaller than the diameter of the cleaning wheel (43).
6. The self-cooling device for the multi-stage water pump seal of claim 3, wherein two said side wall cleaning rings (42) are symmetrically disposed about the central axis of the transverse end of the connecting rod (41), no contact occurs between the two said side wall cleaning rings (42) and the rotating ring (4), the side wall of the side wall cleaning ring (42) is sleeved with a cleaning brush, the cleaning brush is disposed around the side wall of the side wall cleaning ring (42), and the outer side wall of the cleaning brush can be attached to the inner wall of the self-cooling inlet pipe (3) and the self-cooling outlet pipe (32).
7. A multi-stage water pump self-cooling unit as claimed in claim 3, wherein said rotating ring (4) has the same diameter as that of said connecting rod (41), and said rotating ring (4) has a rotating opening with the same diameter as that of the rotating connection end of said connecting rod (41).
8. The self-cooling device for the multi-stage water pump unit as claimed in claim 3, wherein two of said cleaning wheels (43) are symmetrically disposed about the central axis of the transverse end of said connecting rod (41), said cleaning wheels (43) are disposed in a convex scraping wheel structure, the cross section of the convex front end of said convex scraping wheel is disposed in an inward-inclined structure, and the side wall of said cleaning wheels (43) is attached to the inner wall of said self-cooling inlet pipe (3) and said self-cooling outlet pipe (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110932385.5A CN113803243B (en) | 2021-08-13 | 2021-08-13 | Multistage water pump mechanical seal self-cooling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110932385.5A CN113803243B (en) | 2021-08-13 | 2021-08-13 | Multistage water pump mechanical seal self-cooling device |
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| CN113803243A true CN113803243A (en) | 2021-12-17 |
| CN113803243B CN113803243B (en) | 2023-08-18 |
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| RU18561U1 (en) * | 2001-01-09 | 2001-06-27 | Акционерное общество "Татнефть" | MULTI-STAGE CENTRIFUGAL PUMP |
| CN101769379A (en) * | 2010-03-23 | 2010-07-07 | 南京林业大学 | Active type adaptive control mechanical sealing device and control method |
| CN102536876A (en) * | 2012-01-18 | 2012-07-04 | 合肥三益江海泵业有限公司 | Water pump rotating shaft supporting device for multistage centrifugal pump |
| JP2019209256A (en) * | 2018-06-05 | 2019-12-12 | Ｊｆｅエンジニアリング株式会社 | Pipe cleaner |
| CN213758043U (en) * | 2020-11-17 | 2021-07-23 | 浙江龙力科技股份有限公司 | Intelligent multifunctional carpet dust collector capable of spraying cleaning agent liquid |
| CN216812288U (en) * | 2021-08-13 | 2022-06-24 | 华能桐乡燃机热电有限责任公司 | Multistage water pump machine seals from cooling device |
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2021
- 2021-08-13 CN CN202110932385.5A patent/CN113803243B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU18561U1 (en) * | 2001-01-09 | 2001-06-27 | Акционерное общество "Татнефть" | MULTI-STAGE CENTRIFUGAL PUMP |
| CN101769379A (en) * | 2010-03-23 | 2010-07-07 | 南京林业大学 | Active type adaptive control mechanical sealing device and control method |
| CN102536876A (en) * | 2012-01-18 | 2012-07-04 | 合肥三益江海泵业有限公司 | Water pump rotating shaft supporting device for multistage centrifugal pump |
| JP2019209256A (en) * | 2018-06-05 | 2019-12-12 | Ｊｆｅエンジニアリング株式会社 | Pipe cleaner |
| CN213758043U (en) * | 2020-11-17 | 2021-07-23 | 浙江龙力科技股份有限公司 | Intelligent multifunctional carpet dust collector capable of spraying cleaning agent liquid |
| CN216812288U (en) * | 2021-08-13 | 2022-06-24 | 华能桐乡燃机热电有限责任公司 | Multistage water pump machine seals from cooling device |
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