CN214787567U - Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder - Google Patents
Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder Download PDFInfo
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- CN214787567U CN214787567U CN202121372617.8U CN202121372617U CN214787567U CN 214787567 U CN214787567 U CN 214787567U CN 202121372617 U CN202121372617 U CN 202121372617U CN 214787567 U CN214787567 U CN 214787567U
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Abstract
The utility model relates to a rotor wheel hub temperature measuring device that jar was cut to power plant's low pressure cylinder, including fixing the temperature measurement support at the cylinder internal surface, the temperature measurement support includes first arc mount, radial support, second arc mount, the middle part of second arc mount is equipped with radial temperature measurement hole, the middle part of first arc mount is equipped with radial mounting hole, and temperature sleeve wears to establish radial mounting hole radial temperature measurement is downthehole, temperature sleeve's tip stretches out radial temperature measurement hole, be equipped with on the casing of cylinder with the sleeve pipe mounting hole that temperature sleeve corresponds. This application is through setting up the temperature measurement support that comprises first arc mount, second arc mount, radial support, and the temperature sleeve pipe is installed on the temperature measurement support for the temperature sleeve pipe is reliable in the installation of cylinder, and the temperature measurement support still can protect the temperature sleeve pipe and prevent temperature sleeve pipe and turbine blade collision.
Description
Technical Field
The utility model belongs to the technical field of heating power plant's steam turbine control technique and specifically relates to a rotor wheel hub temperature measuring device that is used for power plant's low pressure jar to cut jar.
Background
Along with the continuous expansion of the unit capacity of a power plant, the improvement of the economical efficiency and the safe reliability of the unit operation are very important, the decoupling operation of power production and thermal production can be realized by cutting off the operation mode of a low-pressure cylinder, and the heat supply peak regulation capacity of the thermoelectric unit is improved. In the transformation of the low-pressure cylinder cutting cylinder of the existing steam turbine, the temperature detection is mostly positioned at the blade top of the final-stage active blade, the temperature of the root part of the blade cannot be measured, the blade is connected with the hub through the root part, the centrifugal tensile stress and the shearing stress of the rotor during high-speed rotation are born by the root part of the blade, the fracture of the blade and the hub is easily caused when the temperature of the root part of the blade exceeds an allowable value, and great influence is generated on the safe operation of a unit. The temperature measuring device for the steam turbine rotor hub after cylinder cutting and transformation of the low-pressure cylinder of the coal-fired power plant comprises a low-pressure cylinder, cylinder sealing grease, a first square groove and a sealing and welding block, wherein a low-pressure cylinder joint surface is installed at the top end of the low-pressure cylinder, the cylinder sealing grease is arranged at the top end of the low-pressure cylinder joint surface, the first square groove is uniformly arranged at the top end of the low-pressure cylinder joint surface, temperature measuring elements are installed inside a first temperature sleeve and a second temperature sleeve, the second square groove is uniformly arranged at the top end of a partition plate, a limiting ring is sleeved at the bottom end of the second temperature sleeve, and a soldering tin bar is installed at the bottom end of the partition plate; the utility model discloses a through real-time supervision steam turbine rotor last stage wheel drum temperature, guarantee at unit operation in-process temperature sleeve pipe not take place to bump the mill with the movable vane, prevent that temperature sleeve pipe from taking place to shake at unit operation in-process, lead to the measurement station inefficacy, guarantee the tightness of fluting installation temperature back cylinder faying face. However, in the temperature measuring device disclosed in this document, the reliability of the mounting and fixing structure of the second temperature bushing is poor, and improvement is demanded.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rotor wheel hub temperature measuring device that is used for power plant's low pressure jar to cut jar for detect blade root temperature.
In order to solve the problem, the utility model provides a rotor wheel hub temperature measuring device for jar is cut to power plant's low pressure cylinder, including fixing the temperature measurement support at the cylinder internal surface, the temperature measurement support includes the first arc mount that links to each other with cylinder internal surface fixation, the both ends of first arc mount are equipped with the radial support that extends to rotor wheel hub, two the tip of radial support be equipped with the parallel second arc mount of first arc mount, the middle part of second arc mount is equipped with radial temperature measurement hole, the middle part of first arc mount is equipped with radial mounting hole, and temperature sleeve pipe wears to establish radial mounting hole radial temperature measurement is downthehole, temperature sleeve's tip stretches out radial temperature measurement hole, be equipped with on the casing of cylinder with the sleeve pipe mounting hole that temperature sleeve pipe corresponds.
The utility model provides a rotor wheel hub temperature measuring device for power plant's low pressure jar is cut jar still has following technical characteristic:
furthermore, the joint surface of the cylinder is provided with the sleeve mounting hole.
Furthermore, the second arc-shaped fixing frame comprises a middle positioning frame and a plurality of arc-shaped connecting strips, and a plurality of side temperature sensing holes communicated with the radial temperature sensing holes are further formed in the middle positioning frame.
Furthermore, a first positioning ring matched with the radial temperature measuring hole is arranged on the temperature sleeve.
Furthermore, a second positioning ring matched with the radial mounting hole is arranged on the temperature sleeve.
Furthermore, a groove communicated with the radial mounting hole is further formed in the side face of the first arc-shaped fixing frame, and a positioning block matched with the groove is arranged on the temperature sleeve.
Furthermore, an arc isolation groove is further formed in the first arc-shaped fixing frame.
Furthermore, a radial isolation groove is formed in the radial support.
The utility model discloses following beneficial effect has: according to the temperature measurement device, the temperature measurement support is formed by the first arc-shaped fixing frame, the second arc-shaped fixing frame and the radial support, the temperature sleeve is arranged on the temperature measurement support, so that the temperature sleeve can be reliably arranged in the cylinder, and the temperature measurement support can also protect the temperature sleeve to prevent the temperature sleeve from colliding with the turbine blade; particularly, the temperature support is fixed on the inner surface of the cylinder and located between the last-stage driving blade and the next-last-stage driving blade, the length of the radial support is determined according to the inner diameter of the cylinder of the steam turbine and the diameter of the rotor hub, the second arc-shaped fixing frame is close to the outer surface of the rotor hub but is not in contact with the rotor hub, and therefore non-contact temperature measurement can be conducted on the rotor hub through the temperature sleeve arranged on the temperature measurement support.
Drawings
FIG. 1 is a schematic structural view of a rotor hub temperature measuring device for a low-pressure cylinder cutting cylinder of a power plant according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of another perspective of the rotor hub temperature measuring device of FIG. 1;
FIG. 3 is a schematic structural view of a temperature measurement bracket according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a temperature sensing sleeve according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the embodiment of the rotor hub temperature measuring device for the low-pressure cylinder cutting cylinder of the power plant as shown in fig. 1 to 4, this a rotor wheel hub temperature measuring device for power plant's low pressure cylinder cuts jar is including fixing the temperature measurement support 10 at the cylinder internal surface, temperature measurement support 10 includes the first arc mount 11 that links to each other with cylinder internal surface fixed, the both ends of first arc mount 11 are equipped with the radial support 13 to rotor wheel hub extension, the tip of two radial supports 13 is equipped with the second arc mount 12 parallel with first arc mount 11, the middle part of second arc mount 12 is equipped with radial temperature measurement hole 101, the middle part of first arc mount 11 is equipped with radial mounting hole 102, temperature sleeve 20 wears to establish at radial mounting hole 102, in the radial temperature measurement hole 101, radial temperature measurement hole 101 is stretched out to the tip of temperature sleeve 20, be equipped with the sleeve pipe mounting hole that corresponds with temperature sleeve 20 on the casing of cylinder. According to the temperature measurement device, the temperature measurement support is formed by the first arc-shaped fixing frame, the second arc-shaped fixing frame and the radial support, the temperature sleeve is arranged on the temperature measurement support, so that the temperature sleeve can be reliably arranged in the cylinder, and the temperature measurement support can also protect the temperature sleeve to prevent the temperature sleeve from colliding with the turbine blade; particularly, the temperature support is fixed on the inner surface of the cylinder and located between the last-stage driving blade and the next-last-stage driving blade, the length of the radial support is determined according to the inner diameter of the cylinder of the steam turbine and the diameter of the rotor hub, the second arc-shaped fixing frame is close to the outer surface of the rotor hub but is not in contact with the rotor hub, and therefore non-contact temperature measurement can be conducted on the rotor hub through the temperature sleeve arranged on the temperature measurement support.
In one embodiment of the present application, it is preferable that the casing mounting hole corresponding to the temperature casing is provided on the cylinder joining surface of the steam turbine, whereby additional drilling on the cylinder housing is not required. Preferably, the second arc-shaped fixing frame 12 comprises a middle positioning frame 121 and a plurality of arc-shaped connecting strips 122, the middle positioning frame 121 is further provided with a plurality of side temperature sensing holes 123 communicated with the radial temperature sensing holes 101, the middle positioning frame 121 is connected with the radial support 13 through the plurality of arc-shaped connecting strips 122, and an isolation gap is formed among the plurality of arc-shaped connecting strips 122 to reduce the temperature transmission between the radial support and the middle positioning frame, so that the temperature near the middle positioning frame is closer to the temperature of the rotor hub; the plurality of side temperature sensing holes enable the end part of the temperature sensing sleeve to be in full contact with gas near the middle positioning frame, and the temperature at the middle positioning frame is accurately detected, so that the temperature of the rotor hub is obtained; it can be understood that, since the second arc-shaped fixing frame is close to the rotor hub, although the end part of the temperature sleeve does not contact the rotor hub, a measured temperature which is relatively close to the actual temperature of the rotor hub can be obtained through the temperature sleeve which is installed close to the rotor hub, and the measured temperature is equivalent to the actual temperature of the rotor hub, so that the temperature of the rotor hub is detected through the non-contact temperature measurement.
In an embodiment of the present application, preferably, the temperature sleeve 20 is provided with a first positioning ring 21 which is matched with the radial temperature measuring hole 101, so as to facilitate the installation and positioning of the temperature sleeve, and prevent the end of the temperature sleeve from extending out of the second arc-shaped fixing frame too long to collide with the rotor hub. Preferably, the temperature sleeve 20 is provided with a second positioning ring 22 which is matched with the radial mounting hole 102, so that the temperature sleeve is reliably mounted on the temperature measuring support.
In an embodiment of the present application, preferably, a groove communicated with the radial mounting hole 102 is further formed on a side surface of the first arc-shaped fixing frame 11, and a positioning block 23 matched with the groove is formed on the temperature sleeve 20, thereby facilitating the mounting and fixing of the temperature sleeve. Preferably, the first arc-shaped fixing frame 11 is further provided with an arc-shaped isolation groove 111, and the radial support 13 is provided with a radial isolation groove 131, so that the weight of the temperature measurement support is reduced while the structural strength of the temperature measurement support is ensured, and the heat transfer between the cylinder shell and the second arc-shaped fixing frame is reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The utility model provides a rotor wheel hub temperature measuring device for power plant's low pressure cylinder cuts jar which characterized in that, is including fixing the temperature measurement support at the cylinder internal surface, the temperature measurement support includes the first arc mount that links to each other with cylinder internal surface fixed, the both ends of first arc mount are equipped with the radial support that extends to rotor wheel hub, two the tip of radial support be equipped with the parallel second arc mount of first arc mount, the middle part of second arc mount is equipped with radial temperature measurement hole, the middle part of first arc mount is equipped with radial mounting hole, and the temperature sleeve pipe wears to establish radial mounting hole in the radial temperature measurement hole, the sheathed tube tip of temperature stretches out radial temperature measurement hole, be equipped with on the casing of cylinder with the sleeve pipe mounting hole that the temperature sleeve pipe corresponds.
2. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: and the joint surface of the cylinder is provided with the sleeve mounting hole.
3. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: the second arc-shaped fixing frame comprises a middle positioning frame and a plurality of arc-shaped connecting strips, and a plurality of lateral temperature sensing holes communicated with the radial temperature sensing holes are further formed in the middle positioning frame.
4. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: and a first positioning ring matched with the radial temperature measuring hole is arranged on the temperature sleeve.
5. The temperature measuring device for the rotor hub of the low-pressure cutting cylinder of the power plant as claimed in claim 4, wherein: and a second positioning ring matched with the radial mounting hole is arranged on the temperature sleeve.
6. The temperature measuring device for the rotor hub of the low-pressure cutting cylinder of the power plant as claimed in claim 5, wherein: the side of the first arc-shaped fixing frame is also provided with a groove communicated with the radial mounting hole, and the temperature sleeve is provided with a positioning block matched with the groove.
7. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: an arc isolation groove is further formed in the first arc fixing frame.
8. The rotor hub temperature measuring device for the power plant low-pressure cylinder cutting cylinder as claimed in claim 1, wherein: and the radial support is provided with a radial isolation groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121372617.8U CN214787567U (en) | 2021-06-21 | 2021-06-21 | Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121372617.8U CN214787567U (en) | 2021-06-21 | 2021-06-21 | Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN214787567U true CN214787567U (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121372617.8U Active CN214787567U (en) | 2021-06-21 | 2021-06-21 | Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187565A (en) * | 2021-06-21 | 2021-07-30 | 国电投河南电力工程有限公司 | Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder |
-
2021
- 2021-06-21 CN CN202121372617.8U patent/CN214787567U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187565A (en) * | 2021-06-21 | 2021-07-30 | 国电投河南电力工程有限公司 | Rotor hub temperature measuring device for power plant low-pressure cylinder cutting cylinder |
| CN113187565B (en) * | 2021-06-21 | 2024-05-24 | 国电投河南工程运维有限公司 | Rotor hub temperature measuring device for low-pressure cylinder cutting of power plant |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 177 Fourth Street, Zhengzhou Economic and Technological Development Zone, Zhengzhou City, Henan Province, 450000 Patentee after: State Power Investment Henan Engineering Operation and Maintenance Co.,Ltd. Address before: No.177, 4th Street, economic and Technological Development Zone, Guancheng Hui District, Zhengzhou City, Henan Province, 450000 Patentee before: State power investment Henan Electric Power Engineering Co.,Ltd. |
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| CP03 | Change of name, title or address |