CN202520957U - Main shaft sealing water supply pipeline structure - Google Patents
Main shaft sealing water supply pipeline structure Download PDFInfo
- Publication number
- CN202520957U CN202520957U CN2012200814701U CN201220081470U CN202520957U CN 202520957 U CN202520957 U CN 202520957U CN 2012200814701 U CN2012200814701 U CN 2012200814701U CN 201220081470 U CN201220081470 U CN 201220081470U CN 202520957 U CN202520957 U CN 202520957U
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- Prior art keywords
- water supply
- valve
- regulating valve
- supply pipeline
- pressure regulator
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Abstract
The utility model provides a main shaft sealing water supply pipeline structure, which comprise a main pressure regulating valve and a water supply pipeline of the main pressure regulating valve, wherein the water supply pipeline of the main pressure regulating valve is provided with a pressure reducing and stabilizing valve; the main pressure regulating valve is connected in series with the pressure reducing and stabilizing valve; the water supply pipeline of the main pressure regulating valve is connected in parallel with a standby water supply pipeline; and the standby water supply pipeline is provided with a standby pressure regulating valve. In the main shaft sealing water supply pipeline structure provided by the utility model, the pressure reducing and stabilizing valve is arranged in front of the pressure regulating valve, so that the original water source pressure is reduced from 5Mpa to 2Mpa, the problem of burning of a flat plate in the startup process of a unit due to excessively high pressure is effectively solved, and the regulating accuracy of the main pressure regulating valve is greatly increased; and a standby pipeline and a standby pressure regulating valve are arranged beside the original pressure regulating valve pipeline, the standby pipeline is connected in parallel with an original water supply pipeline and can be switched for later use, so that convenience is brought to overhaul.
Description
Technical field
The utility model relates to a kind of main shaft seal supply channel structure.
Background technique
The form of double-layer plate is adopted in large-scale axial-flow Kaplan set main shaft sealing usually, utilizes cleaning pressure water, between upper surface plate and swivel becket, following flat board and water tank base, forms the twice clearance seal respectively.Sealing water pressure size directly influences the main shaft seal service behaviour.If sealing hydraulic pressure is excessive, as: during greater than 0.25MPa, lubricating water film thickness reduces even destroys moisture film, forms dry friction, and the double-layer plate sealing wear is accelerated, and reduces working life; If sealing hydraulic pressure is too small, as: less than 0.05MPa, the double-layer plate seal failure, the water seal water leakage increases, and does not have seal action.There is following problem in the working seal supply channel at present, shown in accompanying drawing 1:
1), the sealing source pressure is 0.5MPa, much larger than the required pressure of water seal, and only regulates water seal hydraulic pressure through a pressure regulator valve in the middle of this, causes valve opening very little, regulate too sensitively to be inconvenient to regulate.
2), when pressure regulator valve inefficacy water seal hydraulic pressure possibly increase to source pressure, cause water seal pressure excessive, burn out flat board.
Summary of the invention
For solving the problems of the technologies described above; The utility model provides a kind of main shaft seal supply channel structure; Through decompression venting valve is installed before pressure regulator valve, former source pressure is reduced to 2Mpa by 5Mpa, it is excessive to have solved pressure effectively; The unit start process burns dull and stereotyped problem, greatly improves the degree of regulation of main pressure regulator valve; Increasing a spare duct one subsequent use pressure regulator valve is set in that former pressure regulator valve pipeline is other, is parallelly connected state with former supply channel, can switch, subsequent use convenient maintenance mutually.
The above-mentioned purpose of the utility model is to realize through such technological scheme: a kind of main shaft seal supply channel structure; Comprise main pressure regulator valve; The supply channel of main pressure regulator valve, the supply channel of main pressure regulator valve is provided with decompression venting valve, and main pressure regulator valve is connected with decompression venting valve; The supply channel parallel connection one subsequent use supply channel of said main pressure regulator valve, said subsequent use supply channel is provided with subsequent use pressure regulator valve.
Decompression venting valve is positioned at the water inlet front position of main pressure regulator valve.
The supply channel of main pressure regulator valve is provided with service valve.
A kind of main shaft seal supply channel of the utility model structure; Decompression venting valve is installed before main pressure regulator valve, is equivalent to separate unit unit source pressure is reduced, still regulate water seal pressure through former pressure regulator valve; Can conveniently regulate; Improve water seal reliability of operation and sealing effect thereof, increase dull and stereotyped working life, also can not cause the reduction of total source pressure and influence the water supply of other unit.At spare duct of the other increase of the supply channel of main pressure regulator valve, and a subsequent use pressure regulator valve is set, can solves the pressure regulator valve Problem of Failure, guarantee that water seal normally moves.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Fig. 1 is the said working seal supply channel of a background technique structural drawing.
Fig. 2 is the utility model structural representation.
Embodiment
Like Fig. 1, shown in Figure 2, a kind of main shaft seal supply channel structure comprises main pressure regulator valve 1, and the supply channel of main pressure regulator valve 1, the supply channel of main pressure regulator valve 1 are provided with decompression venting valve 2 and pressure gauge 6.Main pressure regulator valve 1 is connected with decompression venting valve 2, the supply channel parallel connection one subsequent use supply channel 3 of said main pressure regulator valve 1, and said subsequent use supply channel 3 is provided with subsequent use pressure regulator valve 4.Decompression venting valve 2 is positioned at the water inlet front position of main pressure regulator valve 1.The supply channel of main pressure regulator valve 1 is provided with service valve 5.
All pipelines of water seal supply channel and valve are arranged on the water wheel chamber working seal supply channel.Decompression venting valve 2 be installed in water wheel chamber working seal supply channel after main pressure regulator valve 1 is connected, parallelly connected, subsequent use each other, as shown in Figure 2 with the subsequent use pressure regulator valve of water seal 4.During proper functioning, clean water can make main pressure regulator valve 1 inlet pressure be stabilized in 0.2MPa through decompression venting valve 2; Regulate the laggard water seal of going into through the trace of main pressure regulator valve 1; When decompression venting valve 2 or main pressure regulator valve 1 fault, open subsequent use pressure regulator valve 4, close decompression venting valve 2 former and later two service valves 5; Maintenance decompression venting valve 2 or main pressure regulator valve 1 realize that the continuous water conservancy project work of water seal can overhaul main pressure regulator valve 1 or decompression venting valve 2.
Claims (3)
1. main shaft seal supply channel structure; Comprise main pressure regulator valve (1); The supply channel of main pressure regulator valve (1) is characterized in that: the supply channel of main pressure regulator valve (1) is provided with decompression venting valve (2), and main pressure regulator valve (1) is connected with decompression venting valve (2); The supply channel parallel connection one subsequent use supply channel (3) of said main pressure regulator valve (1), said subsequent use supply channel (3) is provided with subsequent use pressure regulator valve (4).
2. according to the said a kind of main shaft seal supply channel structure of claim 1, it is characterized in that: said decompression venting valve (2) is positioned at the water inlet front position of main pressure regulator valve (1).
3. according to the said a kind of main shaft seal supply channel structure of claim 1, it is characterized in that: the supply channel of said main pressure regulator valve (1) is provided with service valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200814701U CN202520957U (en) | 2012-03-07 | 2012-03-07 | Main shaft sealing water supply pipeline structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200814701U CN202520957U (en) | 2012-03-07 | 2012-03-07 | Main shaft sealing water supply pipeline structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520957U true CN202520957U (en) | 2012-11-07 |
Family
ID=47103909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200814701U Expired - Lifetime CN202520957U (en) | 2012-03-07 | 2012-03-07 | Main shaft sealing water supply pipeline structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202520957U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513287A (en) * | 2019-08-01 | 2019-11-29 | 南京盛航海运股份有限公司 | A kind of mechanical seal cooling system of Quimby pump peculiar to vessel |
-
2012
- 2012-03-07 CN CN2012200814701U patent/CN202520957U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513287A (en) * | 2019-08-01 | 2019-11-29 | 南京盛航海运股份有限公司 | A kind of mechanical seal cooling system of Quimby pump peculiar to vessel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |