CN211116148U - Steam turbine low pressure cylinder stage rear exhaust temperature measuring device - Google Patents
Steam turbine low pressure cylinder stage rear exhaust temperature measuring device Download PDFInfo
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- CN211116148U CN211116148U CN201922337193.0U CN201922337193U CN211116148U CN 211116148 U CN211116148 U CN 211116148U CN 201922337193 U CN201922337193 U CN 201922337193U CN 211116148 U CN211116148 U CN 211116148U
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- pressure cylinder
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- cylinder
- thermowell
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Abstract
The utility model discloses a steam turbine low pressure cylinder level back exhaust temperature measuring device, including low pressure cylinder outer casing and low pressure cylinder inner casing, the center department fixedly connected with rotor shaft of low pressure cylinder inner casing, the side of low pressure cylinder outer casing runs through fixedly connected with thermowell, thermowell's inner wall swing joint has the thermocouple, thermowell's surface is the first outer tube of fixedly connected with and the second outer casing respectively, through thermowell inflation compensator fixed connection between first outer tube and the second outer casing, thermowell and low pressure cylinder outer casing inner wall pass through thermowell support angle steel support fixed connection. This steam turbine low pressure cylinder level back exhaust steam temperature measuring device through setting up first outer tube, second outer tube, thermowell expansion compensator, thermowell support angle steel and thermowell to reach the purpose of measuring the inside movable vane blade back three exhaust steam temperatures of low pressure cylinder, and cool off.
Description
Technical Field
The utility model relates to a steam turbine technical field specifically is a steam turbine low pressure cylinder level back steam temperature measuring device.
Background
When a low-pressure cylinder of a steam turbine operates under the working condition of small volume flow, the temperature of exhaust steam at the back of the last stage of movable blades of the low-pressure cylinder needs to be monitored, a common measuring element at present is a thermocouple, a common installation mode is that a stainless steel sleeve with one end being a blind end is inserted into an inner cylinder of the low-pressure cylinder to a certain depth behind a certain stage of movable blades, and the thermocouple is inserted into the stainless steel sleeve. The fixed mode that stainless steel sleeve pipe stretched into low pressure jar inner cylinder part is that the dead end is unsettled, and the other end and low pressure jar inner cylinder welding, and this structure stretches into low pressure jar inner cylinder length longer, and the rigidity of stainless steel sleeve pipe is worse, the risk of bending, fracture is likely to appear even to this structure only can be used for measuring movable vane top exhaust steam temperature, the exhaust steam temperature in the full height range of movable vane that can not accurate real-time detection.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steam turbine low pressure cylinder level back steam temperature measuring device to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a steam turbine low pressure cylinder level back exhaust temperature measuring device, includes low pressure jar outer cylinder and low pressure jar inner cylinder, the fixedly connected with rotor shaft of center department of low pressure jar inner cylinder, the side of low pressure jar outer cylinder runs through fixedly connected with thermowell, thermowell's inner wall swing joint has the thermocouple, first outer tube of fixedly connected with and second outer tube of thermowell's surface difference, through thermowell expansion compensator fixed connection between first outer tube and the second outer tube, thermowell and low pressure jar outer cylinder inner wall pass through thermowell support angle steel support fixed connection.
Preferably, the low pressure cylinder inner cylinder is located inside the low pressure cylinder outer cylinder, and one end of the rotor shaft penetrates through the front surface of the low pressure cylinder inner cylinder and extends to the back surface of the low pressure cylinder inner cylinder.
Preferably, one end of the thermocouple sleeve penetrates through one side of the low-pressure cylinder outer cylinder and two sides of the low-pressure cylinder inner cylinder, the thermocouple sleeve penetrates through the low-pressure cylinder inner cylinder and is fixed with the inner wall and the outer wall of the low-pressure cylinder outer cylinder through welding, and the thermocouple sleeve is a stainless steel pipe with a blind end.
Preferably, the first outer sleeve and the second outer sleeve are respectively arranged on the inner wall and the side surface of the low-pressure cylinder inner cylinder, and one end of the first outer sleeve penetrates through the inner wall of the low-pressure cylinder inner cylinder and extends to the side surface of the low-pressure cylinder inner cylinder to be fixedly connected with the thermowell expansion compensator.
Preferably, the surface of the thermowell is provided with two thermowell expansion compensators, a first outer sleeve and a second outer sleeve, and each thermowell expansion compensator, the first outer sleeve and the second outer sleeve are respectively arranged on two sides of the inner wall of the low-pressure cylinder inner cylinder.
Preferably, three thermocouples are accommodated in the thermocouple sleeve, and the insertion depths of the three thermocouples are respectively controlled at the position of a blade top temperature measuring point, the position of a blade leaf temperature measuring point and the position of a blade root temperature measuring point in the low-pressure cylinder inner cylinder.
Advantageous effects
The utility model provides a steam turbine low pressure cylinder stage rear exhaust steam temperature measuring device, which is convenient for playing a damping role when a thermocouple sleeve vibrates by arranging a second outer sleeve; the first outer sleeve is used as a guide of the thermocouple sleeve, so that the thermocouple sleeve can be freely expanded; the expansion compensator for the thermocouple sleeve is convenient for absorbing expansion difference between the thermocouple sleeve and the inner cylinder of the low-pressure cylinder, and the thermocouple sleeve supporting angle steel is convenient for fixing the thermocouple sleeve and preventing the thermocouple sleeve between the inner cylinder and the outer cylinder of the low-pressure cylinder from shaking; the thermocouple sleeve is arranged, so that the bent part of the thermocouple sleeve can absorb the expansion difference between the inner cylinder and the outer cylinder of the low-pressure cylinder, and the thermocouple sleeve can accommodate three thermocouples, and the insertion depths of the three thermocouples are respectively controlled at the position of a blade top temperature measuring point, the position of a blade leaf temperature measuring point and the position of a blade root temperature measuring point, so that the aim of measuring the exhaust steam temperature of three positions of a movable blade by sharing one thermocouple sleeve by the three thermocouples is fulfilled.
Drawings
FIG. 1 is a front view of the structure of the present invention;
fig. 2 is an enlarged schematic view of a in fig. 1 of the present invention.
In the figure: the low-pressure cylinder comprises a low-pressure cylinder outer cylinder 1, a low-pressure cylinder inner cylinder 2, a rotor shaft 3, a thermocouple well 4, a thermocouple well 5, a first outer sleeve 6, a second outer sleeve 7, a thermocouple well expansion compensator 8 and a thermocouple well supporting angle steel 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a low-pressure cylinder stage rear exhaust steam temperature measuring device of a steam turbine comprises a low-pressure cylinder outer cylinder 1 and a low-pressure cylinder inner cylinder 2, wherein a rotor shaft 3 is fixedly connected to the center of the low-pressure cylinder inner cylinder 2, the low-pressure cylinder inner cylinder 2 is located inside the low-pressure cylinder outer cylinder 1, one end of the rotor shaft 3 penetrates through the front face of the low-pressure cylinder inner cylinder 2 and extends to the back face of the low-pressure cylinder inner cylinder 2, a thermocouple sleeve 4 is fixedly connected to the side face of the low-pressure cylinder outer cylinder 1 in a penetrating mode, one end of the thermocouple sleeve 4 penetrates through one side of the low-pressure cylinder outer cylinder 1 and two sides of the low-pressure cylinder inner cylinder, the thermocouple sleeve 4 penetrates through the low-pressure cylinder inner cylinder 2 and is fixedly welded to the inner wall and the outer wall of the low-pressure cylinder outer cylinder 1, a thermocouple 5 is movably connected to the inner wall of the thermocouple sleeve 4, three thermocouples 5 are contained inside the thermocouple sleeve 4, and, The temperature measuring point position of the leaf and the temperature measuring point position of the blade root, the surface of the thermowell 4 is respectively and fixedly connected with a first outer sleeve 6 and a second outer sleeve 7, the first outer sleeve 6 and the second outer sleeve 7 are fixedly connected through a thermowell expansion compensator 8, the first outer sleeve 6 and the second outer sleeve 7 are respectively arranged on the inner wall and the side surface of the low-pressure cylinder inner cylinder 2, one end of the first outer sleeve 6 penetrates through the inner wall of the low-pressure cylinder inner cylinder 2 and extends to the side surface of the low-pressure cylinder inner cylinder 2 to be fixedly connected with a thermowell expansion compensator 8, two thermowell expansion compensators 8, the first outer sleeve 6 and the second outer sleeve 7 are arranged on the surface of the thermowell 4, and each thermowell expansion compensator 8, the first outer sleeve 6 and the second outer sleeve 7 are respectively arranged on two sides of the inner wall of the low-pressure cylinder inner cylinder 2, and the thermowell 4 is fixedly connected with the inner wall of the low-pressure cylinder outer cylinder 1 through a thermowell support angle steel 9 in a supporting manner.
The working principle is as follows: when the device for measuring the temperature of the low-pressure cylinder stage rear exhaust steam of the steam turbine is used, when the thermocouples 5 at the blade top temperature measuring point position, the blade leaf temperature measuring point position and the blade root temperature measuring point position in the low-pressure cylinder inner cylinder 2 carry out exhaust steam temperature measurement on the movable blade in the low-pressure cylinder inner cylinder 2, when the temperature reaches a certain temperature, the expansion difference between the thermowell 4 and the low-pressure cylinder inner cylinder 2 is absorbed by the thermowell expansion compensator 8, when the thermowell 4 shakes, the angle steel 9 is effectively fixed through the thermowell support, so that shaking force is reduced, when thermowell 4 is subjected to excessive heat, thermowell 4 bends to reduce the impact force of the heat, the bent portion of thermowell 4 can absorb the differential expansion between the inner and outer cylinders of the low pressure cylinder, therefore, the effect that the device for measuring the temperature of the stage rear exhaust steam in the low-pressure cylinder of the steam turbine has the cooling effect is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a steam turbine low pressure cylinder grade back steam exhaust temperature measuring device, includes low pressure jar outer casing (1) and low pressure jar inner casing (2), its characterized in that: fixedly connected with rotor shaft (3) is located at the center of low pressure jar inner cylinder (2), fixedly connected with thermowell (4) is run through to the side of low pressure jar outer cylinder (1), the inner wall swing joint of thermowell (4) has thermocouple (5), the surface difference fixedly connected with first outer tube (6) and second outer tube (7) of thermowell (4), through thermowell expansion compensator (8) fixed connection between first outer tube (6) and second outer tube (7), thermowell (4) and low pressure jar outer cylinder (1) inner wall support fixed connection through thermowell support angle steel (9).
2. The apparatus of claim 1, wherein the turbine low pressure cylinder stage rear exhaust temperature measuring device comprises: the low-pressure cylinder inner cylinder (2) is located inside the low-pressure cylinder outer cylinder (1), and one end of the rotor shaft (3) penetrates through the front face of the low-pressure cylinder inner cylinder (2) and extends to the back face of the low-pressure cylinder inner cylinder (2).
3. The apparatus of claim 1, wherein the turbine low pressure cylinder stage rear exhaust temperature measuring device comprises: one end of the thermocouple sleeve (4) penetrates through one side of the low-pressure cylinder outer cylinder (1) and two sides of the low-pressure cylinder inner cylinder, and the thermocouple sleeve (4) penetrates through the low-pressure cylinder inner cylinder (2) and the inner wall and the outer wall of the low-pressure cylinder outer cylinder (1) to be fixed through welding.
4. The apparatus of claim 1, wherein the turbine low pressure cylinder stage rear exhaust temperature measuring device comprises: the first outer sleeve (6) and the second outer sleeve (7) are respectively arranged on the inner wall and the side face of the low-pressure cylinder inner cylinder (2), and one end of the first outer sleeve (6) penetrates through the inner wall of the low-pressure cylinder inner cylinder (2) and extends to the side face of the low-pressure cylinder inner cylinder (2) to be fixedly connected with the thermocouple sleeve expansion compensator (8).
5. The apparatus of claim 1, wherein the turbine low pressure cylinder stage rear exhaust temperature measuring device comprises: the surface of the thermocouple well (4) is provided with two thermocouple well expansion compensators (8), a first outer sleeve (6) and a second outer sleeve (7), and each thermocouple well expansion compensator (8), the first outer sleeve (6) and the second outer sleeve (7) are respectively arranged on two sides of the inner wall of the low-pressure cylinder inner cylinder (2).
6. The apparatus of claim 1, wherein the turbine low pressure cylinder stage rear exhaust temperature measuring device comprises: three thermocouples (5) are accommodated in the thermocouple sleeve (4), and the insertion depths of the three thermocouples (5) are respectively controlled at the leaf top temperature measuring point position, the leaf temperature measuring point position and the leaf root temperature measuring point position in the low-pressure cylinder inner cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922337193.0U CN211116148U (en) | 2019-12-24 | 2019-12-24 | Steam turbine low pressure cylinder stage rear exhaust temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922337193.0U CN211116148U (en) | 2019-12-24 | 2019-12-24 | Steam turbine low pressure cylinder stage rear exhaust temperature measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN211116148U true CN211116148U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922337193.0U Expired - Fee Related CN211116148U (en) | 2019-12-24 | 2019-12-24 | Steam turbine low pressure cylinder stage rear exhaust temperature measuring device |
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| CN (1) | CN211116148U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696239A (en) * | 2020-12-09 | 2021-04-23 | 上海发电设备成套设计研究院有限责任公司 | Long blade temperature control system and method for low-pressure cylinder under low-flow working condition |
| 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 |
| CN113432736A (en) * | 2021-06-22 | 2021-09-24 | 西安热工研究院有限公司 | Casing pipe capable of replacing temperature measuring points of penultimate and last-stage blades on line |
-
2019
- 2019-12-24 CN CN201922337193.0U patent/CN211116148U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696239A (en) * | 2020-12-09 | 2021-04-23 | 上海发电设备成套设计研究院有限责任公司 | Long blade temperature control system and method for low-pressure cylinder under low-flow working condition |
| 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 |
| CN113432736A (en) * | 2021-06-22 | 2021-09-24 | 西安热工研究院有限公司 | Casing pipe capable of replacing temperature measuring points of penultimate and last-stage blades on line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200814 Address after: 100045, Beijing, Xicheng District, three Li River, two district, three li, Hedong Road, No. 5 Patentee after: Song Shaowei Address before: No. 3777 Yidu Avenue, Longquanyi District, Chengdu, Sichuan 610110 Patentee before: Liang Shuangrong |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 Termination date: 20201224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |