CN114688073B - Packaging type packing sealing structure - Google Patents
Packaging type packing sealing structure Download PDFInfo
- Publication number
- CN114688073B CN114688073B CN202011612164.1A CN202011612164A CN114688073B CN 114688073 B CN114688073 B CN 114688073B CN 202011612164 A CN202011612164 A CN 202011612164A CN 114688073 B CN114688073 B CN 114688073B
- Authority
- CN
- China
- Prior art keywords
- packing
- sealing structure
- containerized
- clamping device
- assembly
- Prior art date
- 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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Links
- 238000012856 packing Methods 0.000 title claims abstract description 163
- 238000007789 sealing Methods 0.000 title claims abstract description 65
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 16
- 210000004907 gland Anatomy 0.000 claims abstract description 23
- 238000011010 flushing procedure Methods 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 abstract description 10
- 238000011900 installation process Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- 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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Mechanical Sealing (AREA)
Abstract
The application relates to a packaging type packing sealing structure, which comprises: the packing box comprises a packing (1), a packing box (4), a clamping device assembly and a connecting piece assembly; the containerized packing sealing structure also comprises a packing ring (2) and/or a packing gland (5); the containerized packing sealing structure can be matched with a set cavity and/or a shaft body; the outer side surface or part of the outer side surface of the containerized packing sealing structure can be matched with a set cavity, and the inner side surface or part of the inner side surface of the containerized packing sealing structure can be matched with a set shaft. The packaging type packing sealing structure provided by the application is time-saving and labor-saving, and the operation is simplified. The entire installation process can be accomplished by merely tightening the fasteners. The whole packing is not required to be cut into small roots through calculation, and then the small roots are plugged into the pump cavity one by one, so that the tightness degree of the packing is not required to be regulated during installation, the operation is simplified, and the time and the labor are saved.
Description
Technical Field
The application relates to the field of water pumps, in particular to a packaging type packing sealing structure.
Background
The traditional packing seal is cuboid with square cross section, the length of a single packing is calculated according to the radial dimension of a packing cavity before installation, then the packing with the required quantity and corresponding length is cut out, finally the packing is plugged into the packing cavity, and finally a packing gland is installed, and a fastener is screwed. The process is complicated to install, long in time and inconvenient, and an installer needs to have corresponding technical skills to complete the process.
Secondly, because the packing seal needs to be washed, the packing cavity also needs to be designed with corresponding washing holes, so that the casting of the part is complex, and the processing procedure of the part is increased.
Therefore, there is a need for a cartridge packing seal structure, which is provided with a packing flushing water port, and only needs to be installed at a corresponding position, the fastener is screwed, and the limit gasket is lifted. The packaging type packing sealing structure is convenient to install, consumes less time and has low technical skill requirements on installers.
Disclosure of Invention
The application discloses a packaging type packing sealing structure, which comprises: a packing, a packing box and a connector assembly; the containerized packing sealing structure also comprises a packing ring and/or a packing gland;
The containerized packing sealing structure can be matched with a set cavity and/or a shaft body; the outer side surface or part of the outer side surface of the containerized packing sealing structure can be matched with a set cavity, and the inner side surface or part of the inner side surface of the containerized packing sealing structure can be matched with a set shaft; the stuffing box comprises a stuffing space; a filler is arranged in the filler space; a packing ring and/or a packing gland are/is arranged in the packing space;
the packing box is provided with a flushing hole; the filling space is communicated with the external space through the flushing hole;
The packing ring and/or the packing gland are matched with a packing port of the packing box; the packing gland is connected with the packing box through a connecting piece assembly.
In a preferred embodiment, the cartridge packing seal comprises a packing ring and a packing gland; the containerized packing sealing structure also comprises a clamping device assembly;
the inner side surface or part of the inner side surface of the containerized packing sealing structure is provided with a shaft sleeve;
the shaft sleeve clamps the shaft sleeve and the shaft body through the clamping device assembly and the connecting piece assembly.
In a preferred embodiment, the cavity that mates with the outer side or a portion of the outer side of the cartridge packing seal comprises a pump cavity;
The pump cavity is connected with the stuffing box through a connecting piece assembly.
In a preferred embodiment, the connector assembly includes a sealing connector;
the pump cavity is connected with the packing box through a connecting piece for sealing.
In a preferred embodiment, the sealing ring assembly is further included;
A sealing ring component is arranged between the pump cavity and the stuffing box;
the seal ring assembly comprises a first seal ring;
a first sealing ring is arranged between the pump cavity and the packing box.
In a preferred embodiment, the connector assembly further comprises a third connector;
the clamping device assembly comprises a first clamping device and a second clamping device;
the shaft sleeve and the shaft body are fixed through the first clamping device, the second clamping device and the second connecting piece;
The connection assembly further comprises a third connection member;
the packing gland is fixedly connected with the packing box through a third connecting piece.
In a preferred embodiment, the seal ring assembly further comprises a second seal ring;
And a second sealing ring is arranged between the shaft sleeve and the shaft body.
In a preferred embodiment, the inner side surface or part of the inner side surface of the containerized packing sealing structure is provided with a shaft sleeve; the sleeve has a recess which cooperates with a stop washer so that the packing space is closed.
In a preferred embodiment, the packing space is a concave structure.
In a preferred embodiment, the cartridge packing seal is mated with both the cavity and the shaft.
Compared with the prior art, the containerized packing sealing structure provided by the application has the following technical effects:
1. The packaging type packing sealing structure provided by the application is time-saving and labor-saving, and the operation is simplified. The entire installation process can be accomplished by merely tightening the fasteners. The whole packing is not required to be cut into small roots through calculation, and then the small roots are plugged into the pump cavity one by one, so that the tightness degree of the packing is not required to be regulated during installation, the operation is simplified, and the time and the labor are saved.
2. The packaging type packing sealing structure provided by the application ensures the cleaning of the field. Besides the spanner, other operation tools are not needed, and the cleaning of the installation site is ensured.
3. The pump cavity does not need to be provided with a flushing hole, the casting is simple, and the yield of pump cavity castings is improved.
4. The packing flushing water interface is arranged on the packaging type packing sealing structure, and the packing flushing water interface is only required to be arranged at a corresponding position, the fastener is screwed, and the limiting gasket is lifted. The packaging type packing sealing structure is convenient to install, consumes less time and has low technical skill requirements on installers.
5. The integrated packing seal provided by the application is formed by assembling scattered small pieces into an assembly, so that the purposes of simplifying operation steps, realizing quick connection and fastening, saving installation time, reducing installation operation tools, improving the working efficiency of packing installation and improving the environment of a test site are achieved.
The numerous technical features described in the description of the present application are distributed among the various technical solutions, which can make the description too lengthy if all possible combinations of technical features of the present application (i.e., technical solutions) are to be listed. In order to avoid this problem, the technical features disclosed in the above summary of the application, the technical features disclosed in the following embodiments and examples, and the technical features disclosed in the drawings may be freely combined with each other to constitute various new technical solutions (which should be regarded as having been described in the present specification) unless such a combination of technical features is technically impossible. For example, in one example, feature a+b+c is disclosed, in another example, feature a+b+d+e is disclosed, and features C and D are equivalent technical means that perform the same function, technically only by alternative use, and may not be adopted simultaneously, feature E may be technically combined with feature C, and then the solution of a+b+c+d should not be considered as already described because of technical impossibility, and the solution of a+b+c+e should be considered as already described.
Drawings
Fig. 1 shows a prior art packing seal.
Fig. 2 is a schematic diagram of a cartridge packing seal structure provided by the application.
Fig. 3 is a side view of the cartridge packing seal structure provided by the present application.
Reference numerals:
The application comprises the following steps:
1. A filler; 2. a packing ring; 3. a first seal ring; 4. a stuffing box; 5. a packing gland; 6. a stop pad; 7. a first connector; 8. a first clamping device; 9. a second clamping device; 10. a second connector; 11. a third connecting member; 12. a sealing connector; 13. a shaft sleeve; 14. a second seal ring; 18. a pump cavity; 19. the wells were rinsed.
The prior art comprises the following steps:
15. A filler; 16. a packing gland; 17. the wells were rinsed.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be understood by those skilled in the art that the claimed application may be practiced without these specific details and with various changes and modifications from the embodiments that follow.
The application discloses a packaging type packing sealing structure, which comprises: a packing 1, a packing box 4 and a connector assembly; the containerized packing sealing structure also comprises a packing ring 2 and/or a packing gland 5; the containerized packing sealing structure can be matched with a set cavity and/or a shaft body; the outer side surface or part of the outer side surface of the containerized packing sealing structure can be matched with a set cavity, and the inner side surface or part of the inner side surface of the containerized packing sealing structure can be matched with a set shaft; the stuffing box 4 comprises a stuffing space; a filler 1 is arranged in the filler space; a packing ring 2 and/or a packing gland 5 are/is arranged in the packing space; the packing box 4 is provided with a flushing hole 19; the packing space is communicated with the external space through the flushing hole 19, and in addition, the flushing hole 19 can be externally connected with flushing water for sealing, cooling and lubricating, or the flushing hole 19 enables the packing space to be sealed through a plug; the packing ring 2 and/or the packing gland 5 are matched with a packing port of the packing box 4; the packing gland 5 is connected with the packing box 4 through a connector assembly.
The containerized packing sealing structure comprises a packing ring 2 and a packing gland 5; the containerized packing sealing structure also comprises a clamping device assembly; the inner side surface or part of the inner side surface of the containerized packing sealing structure is provided with a shaft sleeve 13; the sleeve 13 clamps the sleeve 13 to the shaft body by means of a clamping device assembly and a connector assembly.
The cavity which mates with the outer side or part of the outer side of the cartridge packing seal structure comprises a pump cavity 18; the pump chamber 18 is connected to the stuffing box 4 by a connector assembly.
The connector assembly includes a sealing connector 12;
The pump chamber 18 is connected to the stuffing box 4 by a sealing connection 12.
The application provides a packaging type packing sealing structure, which also comprises a sealing ring component; a sealing ring assembly is arranged between the pump cavity 18 and the stuffing box 4; the seal ring assembly comprises a first seal ring 3; a first sealing ring 3 is arranged between the pump cavity 18 and the stuffing box 4.
The connector assembly further comprises a second connector 10; the clamping device assembly comprises a first clamping device 8 and a second clamping device 9; the shaft sleeve 13 is fixed with the shaft body through the first clamping device 8 and the second clamping device 9 and the second connecting piece 10; the connection assembly further comprises a third connection member 11; the packing gland 5 is fixedly connected with the packing box 4 through a third connecting piece 11.
The seal ring assembly further includes a second seal ring 14; a second sealing ring 14 is arranged between the shaft sleeve 13 and the shaft body.
As shown in fig. 2, the inner side or part of the inner side of the container type packing seal structure is provided with a shaft sleeve 13; the sleeve 13 has a recess which cooperates with the stop washer 6 so that the packing space is closed. As shown in fig. 3, the number of the stop washers 6 may be one or more, and when the sleeve 13 is clamped to the shaft body by the first clamping means 8 and the second clamping means 9 and the second connecting member 10, the stop washer 6 is lifted upward in the longitudinal direction, so that the sleeve 13 can be closely fitted to the shaft body, and the packing gland 5 can be closely connected to the packing box 4, so that the packing space is closed/sealed.
The packing space is of a concave structure.
The integrated packing sealing structure is matched with the set cavity and the shaft body at the same time.
The cartridge packing seal structure provided by the application is further described below:
The packing box 4 is provided with the required packing 1 and packing ring 2, and the packing gland 5 is fastened on the packing box 4 through a third connecting piece 11, and the packing box 4 is provided with a stop washer 6, a shaft sleeve 13, a first clamping device 8 and a second clamping device 9. Such a cartridge packing is completed, which is provided with packing flushing holes 19. According to the different sizes of the shaft diameter, the cartridge packing seals with various sizes can be designed, so that the installation and the use of pump products with different sizes are convenient. The assembly type packing seal is very simple and easy to operate, and when in assembly, firstly, the assembly type packing seal is assembled on the pump cavity 18 by the connecting piece 12, and a first sealing ring 3 is arranged between the assembly type packing seal and the pump cavity 18 for sealing; then the second connecting piece 10 is screwed down, so that the first clamping device 8 and the second clamping device 9 have the clamping effect, the shaft sleeve 13 is tightly held on the shaft body, and a second sealing ring 14 is arranged between the shaft sleeve 13 and the shaft body for sealing, thereby preventing the medium from leaking from the position between the shaft sleeve and the shaft body; finally, the first connecting piece 7 is unscrewed, the stop washer 6 is lifted outwards, the stop washer 6 is separated from the groove on the shaft sleeve 13, and the first connecting piece 7 is screwed. Thus, the packaging type packing seal is installed, the operation is simple and easy, the whole installation process only needs to screw the connecting piece assembly, the installation position and the packing tightness are adjusted in place. The installation is convenient, the time consumption is less, and the skill requirement on the installer is low. Furthermore, the flushing hole A is formed in the packing box 4, so that a cylindrical lug for drilling the flushing hole is not required to be cast on the pump cavity, and the pump cavity casting is simple and has less processing procedures.
The application provides a packaging type packing seal which is an assembly, and small pieces are assembled into a whole in advance.
It should be noted that in the present patent application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. In the present patent application, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, and two cases are included: the act is performed solely on the basis of the element and is performed on the basis of the element and other elements. Multiple, etc. expressions include 2,2 times, 2, and 2 or more, 2 or more times, 2 or more.
This specification includes combinations of the various embodiments described herein. Separate references to "one embodiment" or a particular embodiment, etc., do not necessarily refer to the same embodiment; however, unless indicated as mutually exclusive or as would be apparent to one of skill in the art, the embodiments are not mutually exclusive. It should be noted that the term "or" is used in this specification in a non-exclusive sense unless the context clearly indicates otherwise or requires otherwise.
All references mentioned in this disclosure are to be considered as being included in the disclosure of the application in its entirety so that modifications may be made as necessary. Further, it is understood that various changes or modifications of the present application may be made by those skilled in the art after reading the above disclosure, and such equivalents are intended to fall within the scope of the application as claimed.
Claims (4)
1. A cartridge packing seal structure comprising: a filler (1), a filler box (4) and a connector assembly; the containerized packing sealing structure also comprises a packing ring (2) and/or a packing gland (5);
The containerized packing sealing structure can be matched with a set cavity and/or a shaft body; the outer side surface or part of the outer side surface of the containerized packing sealing structure can be matched with a set cavity, and the inner side surface or part of the inner side surface of the containerized packing sealing structure can be matched with a set shaft; the stuffing box (4) comprises a stuffing space; a filler (1) is arranged in the filler space; a packing ring (2) and/or a packing gland (5) are/is arranged in the packing space;
A flushing hole (19) is formed in the packing box (4); the filling space is communicated with an external space through the flushing hole (19);
The packing ring (2) and/or the packing gland (5) are matched with a packing port of the packing box (4);
the packing gland (5) is connected with the packing box (4) through a connecting piece assembly;
the containerized packing sealing structure also comprises a clamping device assembly;
The inner side surface or part of the inner side surface of the containerized packing sealing structure is provided with a shaft sleeve (13);
the shaft sleeve (13) clamps the shaft sleeve (13) and the shaft body through the clamping device assembly and the connecting piece assembly;
The cavity matched with the outer side surface or part of the outer side surface of the containerized packing sealing structure comprises a pump cavity (18);
The pump cavity (18) is connected with the stuffing box (4) through a connecting piece assembly;
the connector assembly includes a sealing connector (12);
The pump cavity (18) is connected with the stuffing box (4) through a connecting piece (12) for sealing;
the packaging type packing sealing structure also comprises a sealing ring component;
a sealing ring component is arranged between the pump cavity (18) and the stuffing box (4);
The seal ring assembly comprises a first seal ring (3);
a first sealing ring (3) is arranged between the pump cavity (18) and the packing box (4);
the connector assembly further comprises a second connector (10);
the clamping device assembly comprises a first clamping device (8) and a second clamping device (9);
the shaft sleeve (13) is fixed with the shaft body through the first clamping device (8) and the second clamping device (9) and the second connecting piece (10);
the connector assembly further comprises a third connector (11);
The packing gland (5) is fixedly connected with the packing box (4) through a third connecting piece (11);
The seal ring assembly further comprises a second seal ring (14);
a second sealing ring (14) is arranged between the shaft sleeve (13) and the shaft body.
2. The cartridge packing seal structure according to claim 1, characterized in that an inner side or a part of the inner side of the cartridge packing seal structure is provided with a bushing (13); the sleeve (13) has a recess which cooperates with the stop washer (6) so that the packing space is closed.
3. The cartridge packing seal arrangement of any one of claims 1 to 2, wherein the packing space is a recessed arrangement.
4. The cartridge packing seal arrangement of any one of claims 1 to 2, wherein the cartridge packing seal arrangement cooperates with both the defined cavity and the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011612164.1A CN114688073B (en) | 2020-12-30 | 2020-12-30 | Packaging type packing sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011612164.1A CN114688073B (en) | 2020-12-30 | 2020-12-30 | Packaging type packing sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114688073A CN114688073A (en) | 2022-07-01 |
| CN114688073B true CN114688073B (en) | 2024-05-07 |
Family
ID=82132201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011612164.1A Active CN114688073B (en) | 2020-12-30 | 2020-12-30 | Packaging type packing sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114688073B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158944Y (en) * | 1993-05-03 | 1994-03-16 | 中国石油化工总公司 | Sealing with soft filled composite |
| CN201372956Y (en) * | 2009-01-05 | 2009-12-30 | 江苏双达工程技术研究中心有限公司 | Cartridge packing seal box for pump |
| CN203223416U (en) * | 2012-12-28 | 2013-10-02 | 上海连成（集团）有限公司 | High-lift packing seal structure |
| CN204458481U (en) * | 2014-12-31 | 2015-07-08 | 上海连成（集团）有限公司 | A kind of clear water centrifugal pump internal pressure type sealing configuration |
| CN205605486U (en) * | 2016-05-17 | 2016-09-28 | 上海宝冶工程技术有限公司 | Collection dress formula packing structure |
| CN206478226U (en) * | 2016-12-28 | 2017-09-08 | 上海连成（集团）有限公司 | A kind of packaging type filling-material structure |
| CN107542696A (en) * | 2017-10-21 | 2018-01-05 | 王友宏 | The filling sealing structure of pump |
| JP2018122976A (en) * | 2017-02-02 | 2018-08-09 | 株式会社片桐鉄工所 | Rotary valve comprising novel shaft seal device and method for manufacturing valve seal device therefor |
| CN210978015U (en) * | 2019-11-30 | 2020-07-10 | 天长市天元泵阀有限公司 | Mechanical seal flushing device of centrifugal pump |
| CN214247783U (en) * | 2020-12-30 | 2021-09-21 | 上海连成（集团）有限公司 | Packaging type packing sealing structure |
-
2020
- 2020-12-30 CN CN202011612164.1A patent/CN114688073B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158944Y (en) * | 1993-05-03 | 1994-03-16 | 中国石油化工总公司 | Sealing with soft filled composite |
| CN201372956Y (en) * | 2009-01-05 | 2009-12-30 | 江苏双达工程技术研究中心有限公司 | Cartridge packing seal box for pump |
| CN203223416U (en) * | 2012-12-28 | 2013-10-02 | 上海连成（集团）有限公司 | High-lift packing seal structure |
| CN204458481U (en) * | 2014-12-31 | 2015-07-08 | 上海连成（集团）有限公司 | A kind of clear water centrifugal pump internal pressure type sealing configuration |
| CN205605486U (en) * | 2016-05-17 | 2016-09-28 | 上海宝冶工程技术有限公司 | Collection dress formula packing structure |
| CN206478226U (en) * | 2016-12-28 | 2017-09-08 | 上海连成（集团）有限公司 | A kind of packaging type filling-material structure |
| JP2018122976A (en) * | 2017-02-02 | 2018-08-09 | 株式会社片桐鉄工所 | Rotary valve comprising novel shaft seal device and method for manufacturing valve seal device therefor |
| CN107542696A (en) * | 2017-10-21 | 2018-01-05 | 王友宏 | The filling sealing structure of pump |
| CN210978015U (en) * | 2019-11-30 | 2020-07-10 | 天长市天元泵阀有限公司 | Mechanical seal flushing device of centrifugal pump |
| CN214247783U (en) * | 2020-12-30 | 2021-09-21 | 上海连成（集团）有限公司 | Packaging type packing sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114688073A (en) | 2022-07-01 |
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