CN210243072U - Volute pressure measuring device of water turbine - Google Patents
Volute pressure measuring device of water turbine Download PDFInfo
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- CN210243072U CN210243072U CN201921205267.9U CN201921205267U CN210243072U CN 210243072 U CN210243072 U CN 210243072U CN 201921205267 U CN201921205267 U CN 201921205267U CN 210243072 U CN210243072 U CN 210243072U
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Abstract
The utility model provides a hydraulic turbine spiral case pressure measurement device, including fixing the casing of taking the seal chamber on the spiral case conch wall of the hydraulic turbine, this casing inner is connected with the flange, the outer end is connected with the cable threading pipe, the flange lateral surface is arranged in and is formed the surface of water in the spiral case of the hydraulic turbine, pressure pulsation sensor installs in the seal chamber and fixes on the flange medial surface, the cable of being connected with the pressure pulsation sensor electricity, it extends to the spiral case outside and links to each other with monitoring instrument to pass the cable threading pipe, be equipped with the drainage tube on its characterized in that cable threading pipe, be equipped with manometer and control valve on this drainage tube, and the drainage tube exit. When water leaks carelessly in the sealing cavity, the control valve is opened, the water leaking into the sealing cavity is automatically discharged into the drainage pool through the drainage tube, and the water is prevented from entering the cable connector or the pulsation sensor to influence normal pressure measurement.
Description
Technical Field
The utility model relates to a pressure measurement device, especially a device that carries out the pressure measurement to hydraulic turbine spiral case belong to hydroelectric power generation detection device technical field.
Background
The measurement of the pressure pulsation of the volute of the water turbine is very important, the pressure pulsation of the volute of the water turbine is one of main reasons influencing the stable operation of a unit, and the pressure pulsation of the volute of the water turbine can influence the vibration and output swing of the unit, even cause blade cracks and the like. The pressure pulsation sensor is usually installed on the wall of a volute and a tail water pipe, and for a high-water-head water turbine, the problem to be solved is how to ensure the tightness of the pressure sensor because the pressure of the volute is high.
The measuring terminal device mainly solves the problem of tightness of the pressure sensor, can find water leakage conditions in time, and adopts temporary measures to ensure reliable work of the pressure sensor. The existing volute pressure measuring device is characterized in that a cable threading pipe is not a pressure-bearing pipe, the cable threading pipe and a sealed cavity are welded roughly, a gap is reserved in the middle, the cable threading pipe is welded together by a plurality of sections of stainless steel pipes, gaps exist at the welding position, concrete or rock around the cable threading pipe can enter the cable threading pipe through the gaps due to water seepage, the water seepage has pressure, a pressure pulsation sensor and a cable are welded together by adopting soldering tin, an insulating tape is wrapped outside, seepage with the pressure can enter the welding position of the pressure pulsation sensor and the cable, short circuit is caused, and the failure of a measuring point is caused.
SUMMERY OF THE UTILITY MODEL
For solving the above-mentioned problem that prior art exists, the utility model provides a spiral case pressure measurement device of hydraulic turbine.
The utility model discloses a following technical scheme accomplishes: a pressure measuring device for a volute of a water turbine comprises a shell with a sealed cavity and fixed on the wall of the volute of the water turbine, wherein the inner end of the shell is connected with a flange, the outer end of the shell is connected with a cable threading pipe, the outer side surface of the flange is arranged in the volute of the water turbine to form a water passing surface, a pressure pulsation sensor is arranged in the sealed cavity and fixed on the inner side surface of the flange, and a cable electrically connected with the pressure pulsation sensor passes through the cable threading pipe and extends to the outside of the volute of the water turbine to be connected with a monitoring instrument. The pressure pulsation sensor is prevented from being damaged or short-circuited by a cable due to water pressure formed by water inflow.
The inner end of the flange is provided with a groove, and a sealing ring is arranged in the groove to prevent water from entering the sealing cavity from a gap between the shell and the flange.
The pressure pulsation sensor is in threaded connection with the flange, and the flange is fixed at the inner end of the shell through a plurality of bolts so as to be convenient for dismounting the sensor and the flange.
The utility model has the advantages of it is following and effect: by adopting the scheme, when the hydraulic turbine volute casing works normally, the pressure pulsation sensor can timely transmit the detected pressure on the hydraulic turbine volute casing to the monitoring instrument through the flange, and the pressure data of the hydraulic turbine volute casing can be obtained. When careless infiltration in the sealed cavity, in time let the staff discover to ooze water in the sealed cavity through the manometer, then open the control valve, let the infiltration that gets into the sealed cavity discharge into the drainage pond through the drainage tube is automatic, prevent that water from getting into in cable joint or the pulsation sensor and influencing normal pressure measurement.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a diagram of the installation position of the present invention on the spiral casing of the water turbine.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The utility model provides a hydraulic turbine spiral case pressure measurement device, including fixing the casing 5 of taking the sealed chamber on the spiral case 9 conch wall of the hydraulic turbine, 5 the inner of this casing is connected with flange 8, the outer end is connected with cable threading pipe 2, 8 lateral surfaces of flange are arranged in and are formed the surface of water 6 in the spiral case 9 of the hydraulic turbine, pressure pulsation sensor 4 installs and passes through the screw thread and fix on 8 medial surfaces of flange in the sealed chamber, cable 3 with 4 electricity connections of pressure pulsation sensor, it extends to the spiral case 9 outside and links to each other with monitoring instrument to pass cable threading pipe 2 and the last movable joint 1 of it, wherein: a drainage tube 11 is arranged on the cable threading tube 2, a pressure gauge 14 and control valves 12 and 13 are arranged on the drainage tube 11, and the outlet end of the drainage tube 11 is connected with a drainage pool 10 lower than the shell 5; the inner end of the flange 8 is provided with a groove, and a sealing ring 7 is arranged in the groove to prevent water from entering the sealing cavity from a gap between the groove and the flange 8; the pressure pulsation sensor 4 is in threaded connection with the flange 8, and the flange 8 is fixed at the inner end of the shell 5 through a plurality of bolts so as to be convenient for dismounting the sensor 4 and the flange 8.
When in maintenance, the volute 9 is drained to be clean, and the part with water leakage can be repaired. After the casing 5 and the cable threading pipe 2 are installed, a pressure resistance test is carried out, so that the sealing is ensured to be complete, and the pressure resistance test can bear the water pressure of the volute 9.
Claims (3)
1. The utility model provides a hydraulic turbine spiral case pressure measurement device, including fixing the casing of taking the seal chamber on hydraulic turbine spiral case conch wall, this casing inner is connected with the flange, the outer end is connected with the cable threading pipe, the flange lateral surface is arranged in the hydraulic turbine spiral case and is formed the surface of water, pressure pulsation sensor installs in the seal chamber and fixes on the flange medial surface, the cable of being connected with the pressure pulsation sensor electricity, it extends to hydraulic turbine spiral case outside and links to each other with monitoring instrument to pass the cable threading pipe, be equipped with the drainage tube on its characterized in that cable threading pipe, be equipped with manometer and control valve on this drainage tube, and the drainage tube exit end.
2. The pressure measuring device of the spiral casing of the water turbine as claimed in claim 1, wherein the inner end of the flange is provided with a groove, and a sealing ring is arranged in the groove.
3. The pressure measuring device of a water turbine volute according to claim 1, wherein the pressure pulsation sensor is threadedly coupled to a flange fixed to an inner end of the housing by a plurality of bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205267.9U CN210243072U (en) | 2019-07-29 | 2019-07-29 | Volute pressure measuring device of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205267.9U CN210243072U (en) | 2019-07-29 | 2019-07-29 | Volute pressure measuring device of water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210243072U true CN210243072U (en) | 2020-04-03 |
Family
ID=69993220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921205267.9U Active CN210243072U (en) | 2019-07-29 | 2019-07-29 | Volute pressure measuring device of water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210243072U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115493740A (en) * | 2022-11-14 | 2022-12-20 | 长江勘测规划设计研究有限责任公司 | Method and system for measuring pressure pulsation of internal flow passage of water turbine by using machine vision |
| CN116163281A (en) * | 2022-11-28 | 2023-05-26 | 华能澜沧江水电股份有限公司 | Method for integrally casting concrete by joint installation and spiral case joint installation |
-
2019
- 2019-07-29 CN CN201921205267.9U patent/CN210243072U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115493740A (en) * | 2022-11-14 | 2022-12-20 | 长江勘测规划设计研究有限责任公司 | Method and system for measuring pressure pulsation of internal flow passage of water turbine by using machine vision |
| CN115493740B (en) * | 2022-11-14 | 2023-02-28 | 长江勘测规划设计研究有限责任公司 | Method and system for measuring pressure pulsation of internal flow passage of water turbine by using machine vision |
| CN116163281A (en) * | 2022-11-28 | 2023-05-26 | 华能澜沧江水电股份有限公司 | Method for integrally casting concrete by joint installation and spiral case joint installation |
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