CN109855753B - Steam turbine regulation stage steam temperature measuring device - Google Patents
Steam turbine regulation stage steam temperature measuring device Download PDFInfo
- Publication number
- CN109855753B CN109855753B CN201910245040.5A CN201910245040A CN109855753B CN 109855753 B CN109855753 B CN 109855753B CN 201910245040 A CN201910245040 A CN 201910245040A CN 109855753 B CN109855753 B CN 109855753B
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- inner cylinder
- steam
- protective sleeve
- protection sleeve
- thermocouple
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- 238000007789 sealing Methods 0.000 claims abstract description 45
- 238000003475 lamination Methods 0.000 claims abstract description 38
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000009529 body temperature measurement Methods 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 4
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
Abstract
The invention discloses a steam temperature measuring device of a steam turbine adjusting stage, belongs to the technical field of steam turbines, and aims to solve the problems that the existing steam temperature measuring device of the steam turbine adjusting stage is corroded by high-temperature steam, is easy to damage and has larger temperature measuring error when detecting the temperature of the steam. The invention comprises an outer cylinder protective sleeve, an inner cylinder protective sleeve, a baffle, a compression spring, a thermocouple cover, a thermocouple, a pressing plate, a plurality of outer sealing laminations and a plurality of inner sealing laminations; the outer cylinder protection sleeve is fixedly connected to the high-medium pressure outer cylinder of the steam turbine, the inner cylinder protection sleeve is fixedly connected to the high-medium pressure inner cylinder of the steam turbine, the outer cylinder protection sleeve is sleeved on the inner cylinder protection sleeve, a plurality of outer sealing laminations and a plurality of inner sealing laminations are arranged between the outer cylinder protection sleeve and the inner cylinder protection sleeve, each outer sealing lamination is in contact seal with the inner surface of the inner cylinder protection sleeve, and each inner sealing lamination is in contact seal with the outer surface of the outer cylinder protection sleeve. The invention is suitable for temperature detection of the regulating stage steam of the steam turbine.
Description
Technical Field
The invention relates to the technical field of steam turbines, in particular to a temperature measuring device for adjusting stage steam of a steam turbine.
Background
The steam turbine high-pressure inner cylinder has a certain temperature gradient, and measuring points of a steam temperature device after the existing steam turbine is transformed and regulated are all designed on the high-medium-pressure integral inner cylinder, and the steam temperature device does not pass through a high-pressure No. 1 partition plate sleeve and has larger temperature deviation with the true value of steam. In addition, steam between the high-pressure inner cylinder interlayer and the high-pressure outer cylinder interlayer is easy to enter the temperature measuring device due to high pressure and high flow speed, a thermocouple on the steam temperature measuring device is corroded by high-temperature steam in a very severe environment, the steam is easy to damage, and the existing temperature measuring device cannot meet the use requirements.
Disclosure of Invention
The invention provides a steam temperature measuring device of a steam turbine regulating stage, which aims to solve the problems that the existing steam temperature measuring device of the steam turbine regulating stage is corroded by high-temperature steam and is easy to damage and has larger temperature measuring error when detecting the temperature of the steam.
The technical scheme adopted for solving the technical problems is as follows:
the device comprises an outer cylinder protection sleeve, an inner cylinder protection sleeve, a baffle, a compression spring, a thermocouple cover, a thermocouple, a pressing plate, a plurality of outer sealing laminations and a plurality of inner sealing laminations;
the outer cylinder protection sleeve is fixedly connected to the high-medium pressure outer cylinder of the steam turbine, the inner cylinder protection sleeve is fixedly connected to the high-medium pressure inner cylinder of the steam turbine, the outer cylinder protection sleeve is sleeved on the inner cylinder protection sleeve, a plurality of outer sealing laminates and a plurality of inner sealing laminates are arranged between the outer cylinder protection sleeve and the inner cylinder protection sleeve, each outer sealing laminate is sealed with the inner surface of the inner cylinder protection sleeve in a contact mode, each inner sealing laminate is sealed with the outer surface of the outer cylinder protection sleeve in a contact mode, a pressing plate is fixed at the end portion of the inner cylinder protection sleeve, the plurality of outer sealing laminates and the plurality of inner sealing laminates can be tightly pressed together, a thermocouple penetrates through the outer cylinder protection sleeve and stretches into the inner cylinder protection sleeve, the thermocouple and the inner cylinder protection sleeve stretches into a high-pressure baffle plate sleeve of a regulating stage of the steam turbine, a thermocouple cover is arranged on the high-pressure baffle plate sleeve, the thermocouple cover is sleeved on the inner cylinder protection sleeve, a compression spring is arranged between the thermocouple cover and the high-pressure baffle plate sleeve, the compression spring can enable the thermocouple cover to move along the axis of the inner cylinder protection sleeve, and a baffle plate used for limiting the movement of the thermocouple cover is fixedly connected on the high-pressure baffle plate sleeve.
Further, the plurality of outer seal laminations and the plurality of inner seal laminations are staggered.
Further, the thermocouple cover is made of 1Cr9Mo1VNbN steel.
Further, the material of each outer sealing lamination is high-temperature alloy 2136 steel.
Further, the material of each inner sealing lamination is 22Cr12NiMoWV steel.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the thermocouple is stretched into the high-pressure baffle plate sleeve of the steam turbine, so that the thermocouple can be contacted with high-temperature steam at different positions in the regulating stage at intervals to measure the temperature, and the problem that the measurement deviation is large because the steam temperature difference is large and only one position can be measured is avoided.
2. The invention is provided with the outer cylinder protection sleeve and the inner cylinder protection sleeve, and the thermowell is split, so that the installation and the replacement are convenient.
And thirdly, a staggered sealing structure is adopted between the outer cylinder protection sleeve and the inner cylinder protection sleeve by adopting a plurality of outer sealing lamination sheets and a plurality of inner sealing lamination sheets, so that the sealing effect is better.
4. The thermocouple cover is directly contacted with steam, and the thermocouple cover is directly contacted with the zero clearance of the inner cylinder protective sleeve through the elastic action of the compression spring, so that the temperature measurement is more real and accurate.
Drawings
FIG. 1 is a schematic illustration of the present invention;
fig. 2 is a partially enlarged view at I of fig. 1.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 2, which includes an outer cylinder protective sleeve 1, an inner cylinder protective sleeve 2, a baffle 3, a compression spring 4, a thermocouple cap 5, a thermocouple 6, a pressure plate 9, a plurality of outer seal laminations 7, and a plurality of inner seal laminations 8;
the outer cylinder protection sleeve 1 is fixedly connected to a high-medium pressure outer cylinder 10 of the steam turbine, the inner cylinder protection sleeve 2 is fixedly connected to a high-medium pressure inner cylinder 11 of the steam turbine, the outer cylinder protection sleeve 1 is sleeved on the inner cylinder protection sleeve 2, a plurality of outer sealing lamination pieces 7 and a plurality of inner sealing lamination pieces 8 are arranged between the outer cylinder protection sleeve 1 and the inner cylinder protection sleeve 2, each outer sealing lamination piece 7 is in contact seal with the inner surface of the inner cylinder protection sleeve 2, each inner sealing lamination piece 8 is in contact seal with the outer surface of the outer cylinder protection sleeve 1, a pressing plate 9 is fixed at the end part of the inner cylinder protection sleeve 2, the plurality of outer sealing lamination pieces 7 and the plurality of inner sealing lamination pieces 8 are tightly pressed together, a thermocouple 6 penetrates through the outer cylinder protection sleeve 1 and stretches into the inner cylinder protection sleeve 2, the thermocouple 6 and the inner cylinder protection sleeve 2 stretches into a high-pressure baffle plate 12 of a regulating stage of the steam turbine, a thermocouple cover 5 is arranged on the high-pressure baffle plate sleeve 12, the thermocouple cover 5 is sleeved on the inner cylinder protection sleeve 2, a compression spring 4 is arranged between the thermocouple cover 5 and the high-pressure baffle plate 12, the compression spring 4 enables the thermocouple cover 5 to move along the axis of the inner cylinder protection sleeve 2, and the thermocouple cover 5 is fixedly connected with a baffle 3 for limiting movement.
The baffle plate 3 is arranged to prevent the thermocouple cover 5 from being ejected before the inner cylinder protection sleeve 2 is installed again, so that the inner cylinder protection sleeve 2 is convenient to install.
The pressing plate 9 is fixed at the end of the inner cylinder protection sleeve 2, so that the plurality of outer sealing laminations 7 and the plurality of inner sealing laminations 8 can be pressed together to prevent falling.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 2, in which the plurality of outer seal laminations 7 and the plurality of inner seal laminations 8 are staggered.
According to the invention, the plurality of outer sealing laminations 7 and the plurality of inner sealing laminations 8 are arranged in a staggered manner to seal the outer cylinder protection sleeve 1 and the inner cylinder protection sleeve 2, so that the axial and radial sealing between the outer cylinder protection sleeve 1 and the inner cylinder protection sleeve 2 is realized, and the sealing effect is better.
Other compositions and connection relationships are the same as those of the first embodiment.
And a third specific embodiment: the material of the thermocouple cover 5 according to the present embodiment is 1Cr9Mo1VNbN steel, which will be described with reference to fig. 1.
The thermocouple cover 5 is made of high-temperature-resistant and oxidation-resistant materials, so that the thermocouple cover 5 is prevented from being corroded by high-temperature and high-pressure steam, the service life of the inner cylinder protection sleeve 2 is prolonged, the replacement times of the inner cylinder protection sleeve 2 are reduced, and the service life of the thermocouple 6 is further prolonged.
Other compositions and connection relationships are the same as those of the first embodiment.
The specific embodiment IV is as follows: the material of each of the outer seal laminations 7 in this embodiment is superalloy 2136 steel, as described with reference to fig. 2.
Other compositions and connection relationships are the same as those of the first embodiment.
Fifth embodiment: the material of each of the inner seal laminations 8 of this embodiment is 22Cr12NiMoWV steel, as described with reference to fig. 2.
The outer sealing lamination 7 and the inner sealing lamination 8 are made of different materials, so that certain elastic requirements are met, corrosion of high-temperature and high-pressure steam is resisted, sealing performance is improved, the high-temperature and high-pressure steam is prevented from directly entering the thermocouple 6, and scouring corrosion is caused to the thermocouple. Other compositions and connection relationships are the same as those of the first embodiment.
Claims (5)
1. A steam turbine regulation stage steam temperature measuring device is characterized in that: the device comprises an outer cylinder protection sleeve (1), an inner cylinder protection sleeve (2), a baffle plate (3), a compression spring (4), a thermocouple cover (5), a thermocouple (6), a pressing plate (9), a plurality of outer sealing laminations (7) and a plurality of inner sealing laminations (8);
the outer cylinder protective sleeve (1) is fixedly connected to the high and medium pressure outer cylinder (10) of the steam turbine, the inner cylinder protective sleeve (2) is fixedly connected to the high and medium pressure inner cylinder (11) of the steam turbine, the outer cylinder protective sleeve (1) is sleeved on the inner cylinder protective sleeve (2) and provided with a plurality of outer sealing laminates (7) and a plurality of inner sealing laminates (8) between the outer cylinder protective sleeve and the inner cylinder protective sleeve, each outer sealing laminate (7) is sealed in contact with the inner surface of the inner cylinder protective sleeve (2), each inner sealing laminate (8) is sealed in contact with the outer surface of the outer cylinder protective sleeve (1), a pressing plate (9) is fixed at the end part of the inner cylinder protective sleeve (2) so that the plurality of outer sealing laminates (7) and the plurality of inner sealing laminates (8) are tightly pressed together, a thermocouple (6) penetrates through the outer cylinder protective sleeve (1) and stretches into the inner cylinder protective sleeve (2), the thermocouple (6) and the inner cylinder protective sleeve (2) stretch into a high-pressure baffle sleeve (12) of a turbine adjusting stage, a thermocouple cover (5) is arranged on the high-pressure baffle sleeve (12), the thermocouple cover (5) is sleeved on the inner cylinder protective sleeve (2), the thermocouple cover (2) is sealed in contact with the outer surface of the outer cylinder protective sleeve (2), the thermocouple cover (4) can be compressed along the high-pressure baffle (4), the high-pressure baffle plate sleeve (12) is fixedly connected with a baffle plate (3) for limiting the movement of the thermocouple cover (5).
2. The steam turbine conditioning stage steam temperature measurement device of claim 1, wherein: the plurality of outer seal laminations (7) and the plurality of inner seal laminations (8) are staggered.
3. The steam turbine conditioning stage steam temperature measurement device of claim 1, wherein: the thermocouple cover (5) is made of 1Cr9Mo1VNbN steel.
4. The steam turbine conditioning stage steam temperature measurement device of claim 1, wherein: the material of each outer sealing lamination (7) is high-temperature alloy 2136 steel.
5. The steam turbine conditioning stage steam temperature measurement device of claim 1, wherein: the material of each inner sealing lamination (8) is 22Cr12NiMoWV steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910245040.5A CN109855753B (en) | 2019-03-28 | 2019-03-28 | Steam turbine regulation stage steam temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910245040.5A CN109855753B (en) | 2019-03-28 | 2019-03-28 | Steam turbine regulation stage steam temperature measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN109855753A CN109855753A (en) | 2019-06-07 |
| CN109855753B true CN109855753B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910245040.5A Active CN109855753B (en) | 2019-03-28 | 2019-03-28 | Steam turbine regulation stage steam temperature measuring device |
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| CN (1) | CN109855753B (en) |
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| CN112964894B (en) * | 2021-02-03 | 2022-08-26 | 青岛科技大学 | Water vapor simulation generator for gas field distribution measurement experiment |
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