CN211696718U - Monitoring device and temperature measuring system for monitoring temperature of last-stage blade of low-pressure cylinder - Google Patents
Monitoring device and temperature measuring system for monitoring temperature of last-stage blade of low-pressure cylinder Download PDFInfo
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- CN211696718U CN211696718U CN202020570720.2U CN202020570720U CN211696718U CN 211696718 U CN211696718 U CN 211696718U CN 202020570720 U CN202020570720 U CN 202020570720U CN 211696718 U CN211696718 U CN 211696718U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 11
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000009833 condensation Methods 0.000 description 17
- 230000005494 condensation Effects 0.000 description 17
- 238000000605 extraction Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 6
- 238000013021 overheating Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The embodiment of the specification discloses a monitoring device and a temperature measuring system for monitoring the temperature of a last-stage blade of a low-pressure cylinder. The device includes: thermometer pipe, straight tube, thermocouple, first stay tube, second stay tube for the temperature measurement, wherein: the temperature measuring straight pipe penetrates through an opening on the inner cylinder and is welded with the temperature measuring pipe, the temperature measuring straight pipe penetrates through an exhaust steam guide ring and an opening on the outer cylinder and is connected with the thermocouple, one end of the first supporting pipe is welded with the temperature measuring straight pipe, the other end of the first supporting pipe is welded with the inner cylinder clapboard support ring, one end of the second supporting pipe is welded with the temperature measuring straight pipe, and the other end of the second supporting pipe is welded with the outer cylinder end plate; the thermocouple is in signal connection with the control system.
Description
Technical Field
The specification relates to the electromechanical field, and particularly relates to a monitoring device and a temperature measuring system for monitoring the temperature of a last-stage blade of a low-pressure cylinder.
Background
The steam turbine with the SSS clutch can realize three working conditions of pure condensation, extraction condensation and back pressure, wherein the extraction condensation and the back pressure can supply heat to the outside. Along with temperature reduction, the unit heat supply increases, and under the suction condensing condition, the low pressure jar is in operation under minimum cooling flow for a long time, and the overheated risk of blast air exists in low pressure last stage long blade. Moreover, when the heat supply demand is high, the steam turbine operates in a backpressure mode, when the heat supply demand is low, the steam turbine operates in a condensation mode, and along with the difference of the heat supply demand, the heat supply demand of the condensation mode is expected to be improved as much as possible, and the frequency of mode switching is reduced.
Disclosure of Invention
The embodiment of the specification provides a monitoring device and a temperature measuring system for monitoring the temperature of a last-stage blade of a low-pressure cylinder, which are used for overcoming at least one technical problem in the prior art.
According to a first aspect of embodiments herein, there is provided a monitoring device for monitoring the temperature of the last stage vane of a low pressure cylinder, comprising: thermometer pipe, straight tube, thermocouple, first stay tube, second stay tube for the temperature measurement, wherein:
the temperature measuring straight pipe penetrates through an opening on the inner cylinder and is welded with the temperature measuring pipe, the temperature measuring straight pipe penetrates through an exhaust steam guide ring and an opening on the outer cylinder and is connected with the thermocouple, one end of the first supporting pipe is welded with the temperature measuring straight pipe, the other end of the first supporting pipe is welded with the inner cylinder clapboard support ring, one end of the second supporting pipe is welded with the temperature measuring straight pipe, and the other end of the second supporting pipe is welded with the outer cylinder end plate; the thermocouple is in signal connection with the controller.
Optionally, the pipe orifice of the steel pipe at the joint of the straight pipe for measuring temperature and the thermocouple is smooth.
According to a second aspect of the embodiments of the present specification, there is provided a temperature measuring system, the system includes a monitoring device for monitoring a temperature of a last stage vane of a low pressure cylinder, a controller, and the low pressure cylinder, two monitoring devices are respectively installed on left and right sides of a last stage cylinder and a next last stage cylinder of the low pressure cylinder, and the monitoring devices are in signal connection with the controller.
The beneficial effects of the embodiment of the specification are as follows:
through mutual cooperation of three kinds of devices of thermometer pipe, straight tube and thermocouple for the temperature measurement, the blade temperature of low pressure cylinder final stage can be measured, and the first stay tube of rethread and second stay tube are welded firmly with straight tube and each part of cylinder for the temperature measurement, and this monitoring devices simple structure, it is firm reliable, the cost is lower, and the practicality is strong. The monitoring device is arranged at the last stage of the low-pressure cylinder to monitor the temperature of the blades at the last stage of the low-pressure cylinder, so that the condition of overheating of blast air is avoided. The monitoring device is in signal connection with the controller, the temperature of the low-pressure last-stage blade can be monitored in real time, when the steam turbine operates in the extraction and condensation mode, the current condition of the low-pressure rotor is judged by acquiring the temperature of the last-stage blade, the heat supply steam extraction amount is increased as much as possible while the blast overheating of the low-pressure last-stage blade is avoided, the maximum heat supply capacity of the steam turbine under the extraction and condensation working condition is ensured, the safe operation of the steam turbine is ensured, the heat supply requirement can be met under the extraction and condensation working condition as much as possible, the frequency of switching the steam turbine between the extraction and condensation mode and the back pressure mode is reduced, and the influence of frequent switching of the steam turbine between the two modes on the stable operation of the. Two monitoring devices are respectively arranged on the left side and the right side of the low-pressure last stage and the penultimate stage, and one low-pressure cylinder is provided with eight temperature measuring points in total, so that the accident problem caused by measuring point errors is avoided, and the safety of the unit is improved.
The innovation points of the embodiment of the specification comprise:
1. through mutual cooperation of three kinds of devices of thermometer pipe, straight tube and thermocouple for the temperature measurement, the blade temperature of low pressure cylinder final stage can be measured, and the first stay tube of rethread and second stay tube are welded firmly with straight tube and each part of cylinder for the temperature measurement, and this monitoring devices simple structure, it is firm reliable, the cost is lower, and the practicality is strong. The monitoring device is arranged at the last stage of the low-pressure cylinder to monitor the temperature of the blades at the last stage of the low-pressure cylinder, so that the condition of overheating of blast air is avoided. The monitoring device is in signal connection with the controller, can monitor the temperature of the low-pressure last-stage blade in real time, judges the current condition of the low-pressure rotor by acquiring the temperature of the last-stage blade when the steam turbine operates in the extraction and condensation mode, improves the heat supply steam extraction amount as much as possible while avoiding the blast overheating of the low-pressure last-stage blade, ensures the maximum heat supply capacity of the unit under the extraction and condensation working condition and the safe operation of the unit, ensures that the heat supply demand can be met under the extraction and condensation working condition as much as possible, reduces the frequency of switching the steam turbine between the extraction and condensation mode and the back pressure mode, avoids the influence on the stable operation of the unit caused by frequent switching of the unit between the two modes in the prior art, and is one of the innovation points of the embodiment of the specification.
2. Two monitoring devices are respectively arranged on the left side and the right side of the low-pressure last stage and the second last stage, and one low-pressure cylinder is provided with eight temperature measuring points in total, so that the accident problem caused by measuring point errors is avoided, the safety of the unit is improved, and the device is one of the innovation points of the embodiment of the specification.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present specification, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram illustrating a monitoring device for monitoring a temperature of a last stage vane of a low pressure cylinder according to an embodiment of the present disclosure;
in the figure, reference numeral 101 denotes a thermocouple, 102 denotes a straight tube for temperature measurement, 103 denotes a thermo-catheter tube, 104 denotes a second support plate tube, and 105 denotes a first support tube.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present specification without any inventive step are within the scope of the present specification.
It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present specification and the drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the specification discloses a monitoring device and a temperature measuring system for monitoring the temperature of a last-stage blade of a low-pressure cylinder. The following are detailed below.
FIG. 1 is a diagram illustrating a monitoring device for monitoring the temperature of the last stage vane of a low pressure cylinder provided in accordance with an embodiment of the present disclosure. As shown in fig. 1, the apparatus includes: a thermometer guide tube 103, a straight tube 102 for measuring temperature, a thermocouple 101, a first support tube 105, and a second support tube 104, wherein: the temperature measuring device comprises a temperature measuring straight pipe 103, a temperature measuring straight pipe 102, a steam exhaust guide ring, a thermocouple 101, a first support pipe 105, a second support pipe 104, a second support pipe 102, a first steam exhaust guide ring, a second cylinder partition support ring, a second cylinder partition support ring, a; the thermocouple 101 is in signal connection with a control system.
In one embodiment, the components of the monitoring device are all assembled and welded on site, and the process of assembling the monitoring device is as follows: confirming the positions of the holes of the inner cylinder, the steam exhaust guide ring and the outer cylinder, opening the cylinder, forming a hole at the confirmed hole position, penetrating a thermometer guide pipe 103 through the hole on the inner cylinder to be welded with a straight pipe 102 for temperature measurement, penetrating the straight pipe 102 for temperature measurement through the steam exhaust guide pipe and the hole on the outer cylinder to be welded with a thermocouple 101, welding the straight pipe 102 for temperature measurement at one end of a first supporting pipe 105, welding an inner cylinder clapboard support ring at the other end of the first supporting pipe to firmly fix the straight pipe 102 for temperature measurement, welding the straight pipe 102 for temperature measurement at one end of a second supporting pipe 104, and welding an outer cylinder end plate at the other end of the second. The pipe orifice of the steel pipe at the joint of the straight pipe 102 for temperature measurement and the thermocouple 101 is polished smooth to avoid the pipe orifice of the steel pipe from wearing the lead wire of the thermocouple 101. And finally, flaw detection.
Through mutual cooperation of the thermometer guide pipe 103, the straight pipe 102 for measuring temperature and the thermocouple 101, the temperature of the blade at the last stage of the low-pressure cylinder can be measured, and then the straight pipe 102 for measuring temperature and each part of the cylinder are firmly welded through the first supporting pipe 105 and the second supporting pipe 104. The monitoring device is arranged at the last stage of the low-pressure cylinder to monitor the temperature of the blades at the last stage of the low-pressure cylinder, so that the condition of overheating of blast air is avoided. The monitoring device is in signal connection with the controller, the temperature of the low-pressure last-stage blade can be monitored in real time, when the steam turbine operates in the extraction and condensation mode, the current condition of the low-pressure rotor is judged by acquiring the temperature of the last-stage blade, the heat supply steam extraction amount is increased as much as possible while the blast overheating of the low-pressure last-stage blade is avoided, the maximum heat supply capacity of the steam turbine under the extraction and condensation working condition is ensured, the safe operation of the steam turbine is ensured, the heat supply requirement can be met under the extraction and condensation working condition as much as possible, the frequency of switching the steam turbine between the extraction and condensation mode and the back pressure mode is reduced, and the influence of frequent switching of the steam turbine between the two modes on the stable operation of the.
In a specific embodiment, two monitoring devices are respectively arranged on the left side and the right side of the low-pressure last stage and the penultimate stage, and a low-pressure cylinder is provided with eight temperature measuring points in total, so that the accident problem caused by measuring point errors is avoided, and the safety of the unit is improved.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice this description.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solutions of the present specification, and not to limit them; although the present description has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present specification.
Claims (3)
1. A monitoring device for monitoring the temperature of the last stage vane of a low pressure cylinder, comprising: thermometer pipe, straight tube, thermocouple, first stay tube, second stay tube for the temperature measurement, wherein:
the temperature measuring straight pipe penetrates through an opening on the inner cylinder and is welded with the temperature measuring pipe, the temperature measuring straight pipe penetrates through an exhaust steam guide ring and an opening on the outer cylinder and is connected with the thermocouple, one end of the first supporting pipe is welded with the temperature measuring straight pipe, the other end of the first supporting pipe is welded with the inner cylinder clapboard support ring, one end of the second supporting pipe is welded with the temperature measuring straight pipe, and the other end of the second supporting pipe is welded with the outer cylinder end plate;
the thermocouple is in signal connection with the controller.
2. The device according to claim 1, wherein the steel pipe at the joint of the straight pipe for measuring temperature and the thermocouple has a smooth pipe mouth.
3. A thermometric system comprising the monitoring device of claim 1, a controller, and a low pressure cylinder, two of said monitoring devices being mounted to each of the left and right sides of the last and penultimate cylinders of said low pressure cylinder, said monitoring devices being in signal communication with said controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020570720.2U CN211696718U (en) | 2020-04-16 | 2020-04-16 | Monitoring device and temperature measuring system for monitoring temperature of last-stage blade of low-pressure cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020570720.2U CN211696718U (en) | 2020-04-16 | 2020-04-16 | Monitoring device and temperature measuring system for monitoring temperature of last-stage blade of low-pressure cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN211696718U true CN211696718U (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020570720.2U Withdrawn - After Issue CN211696718U (en) | 2020-04-16 | 2020-04-16 | Monitoring device and temperature measuring system for monitoring temperature of last-stage blade of low-pressure cylinder |
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| CN (1) | CN211696718U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2020
- 2020-04-16 CN CN202020570720.2U patent/CN211696718U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Granted publication date: 20201016 Effective date of abandoning: 20231225 |
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