CN209100097U - A kind of system that the upper and lower casing wall temperature difference of solution Steam Turbine Through IP Admission is big - Google Patents
A kind of system that the upper and lower casing wall temperature difference of solution Steam Turbine Through IP Admission is big Download PDFInfo
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- CN209100097U CN209100097U CN201821465617.0U CN201821465617U CN209100097U CN 209100097 U CN209100097 U CN 209100097U CN 201821465617 U CN201821465617 U CN 201821465617U CN 209100097 U CN209100097 U CN 209100097U
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Abstract
The utility model relates to a kind of big systems of the casing wall temperature difference above and below solution Steam Turbine Through IP Admission, and belong to steam turbine leads vapour system.In unit actual moving process, because steam circulation is uneven, causes the upper and lower casing wall temperature difference big, so that cylinder expansion amount is inconsistent and is deformed, influence unit safety stable operation.Outer shell upper half wall temperature the installation of TC is pressed into vapour position, lower half of the outer shell lower half wall temperature the installation of TC in outer shell in outer shell upper half in the utility model；Communicating pipe is arranged at the steam drain of outer shell, and spot dynamic balance hole flange is fixed at the upper half steam drain of outer shell；One end of steam guiding tube is connect with communicating pipe, the other end and spot dynamic balance hole flanged joint of steam guiding tube, is equipped with electric control valve on steam guiding tube；Outer shell upper half wall temperature thermocouple, outer shell lower half wall temperature thermocouple and electric control valve are connected to the control system of unit.The utility model is simple and reasonable, all components can loose mail be transported to scene, determine after good position welding fabrication at the scene.
Description
Technical field
The utility model relates to a kind of big systems of the casing wall temperature difference above and below solution Steam Turbine Through IP Admission, belong to leading for steam turbine
Vapour system.
Background technique
Modern steam turbine, for the deformation for preventing outer shell, is pressed at vapour position in outer shell and cylinder up and down is arranged in design
Wall temperature thermocouple, for monitoring the metal temperature of upper and lower casing wall.
In unit actual moving process, often due to being leaked at reheaing steam pipe and IP inner casing sealing, lead
It causes steam to leak to the clip cavity of IP inner casing and outer shell, causes to circulate because of steam uneven, so that upper lower cylinder half is changed with steam
Metal temperature pace of change is inconsistent when hot, causes the upper and lower casing wall temperature difference big, so that cylinder expansion amount is inconsistent and is deformed,
The through-flow dynamic and static gaps of steam turbine are influenced, mill is touched with rotor generation, influences unit safety stable operation.
Application No. is 201010109093.3 Chinese patent disclose a kind of lower-half cylinder temperature compensation device of cylinder and its
Temperature-compensation method compensates temperature by the way that electric heating tube is arranged in cylinder lower half cylinder, avoids cylinder overall temperature difference big
And the various problems generated.But this method need to be heated additionally, and operating cost is increased, moreover, heating to cylinder may
Cylinder deformation etc. can be further caused.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and it is reasonable to provide a kind of design
Solve the Steam Turbine Through IP Admission big system of the casing wall temperature difference up and down.
The technical scheme in the invention for solving the above technical problem is: a kind of upper and lower casing wall of solution Steam Turbine Through IP Admission
The big system of the temperature difference, including outer shell and IP inner casing, medium pressure inner casing are located in outer shell；It is characterized in that, further including outer shell
Upper half wall temperature thermocouple, outer shell lower half wall temperature thermocouple, steam guiding tube, electric control valve, communicating pipe and spot dynamic balance hole flange；
The outer shell upper half wall temperature the installation of TC is pressed into vapour position, the outer shell lower half wall temperature the installation of TC in outer shell upper half
In the lower half of outer shell；The communicating pipe is arranged at the steam drain of outer shell, and the communicating pipe is provided with hole, for connecting steam guiding tube；
Spot dynamic balance hole flange is fixed at the upper half steam drain of outer shell, and spot dynamic balance hole flange is also provided with hole, is used
In connection steam guiding tube；One end of the steam guiding tube is connect with communicating pipe, the other end and spot dynamic balance hole method of the steam guiding tube
Orchid connects, and is equipped with electric control valve on the steam guiding tube；The outer shell upper half wall temperature thermocouple, outer shell lower half wall temperature thermocouple
The control system of unit is connected to electric control valve.
Furthermore, spot dynamic balance hole flange is fixed by bolt and outer shell, and the bolt passes through lower peripheral surface
In washer and upper spheric washer insertion outer shell, the lower peripheral surface washer is contacted with outer shell, and the upper spheric washer is located at lower peripheral surface
On washer, cover nut is installed at the top of the bolt.
Furthermore, the outer shell is HP-IP combined casing, and high-pressure admission is pressed into the interposition that vapour is respectively positioned on outer shell in
Set, in be pressed into the lower half that steam pipe road is positioned only at outer shell, steam be pressed into steam pipe road enter in intermediate pressure section, through outer shell after acting
The discharge of upper half tail portion；It is pressed into vapour position in outer shell and is provided with High inter case spot dynamic balance hole, will be put down by specific purpose tool
Weighing apparatus block adds on a certain position of High inter case, plays the role of balancing rotor eccentricity power, dynamic by scene when unit is run
The High inter case spot dynamic balance hole is sealed by balance hole flange, prevents steam leakage；Vapour position is pressed into outer shell
It sets, the respectively arranged outer shell upper half wall temperature thermocouple of cylinder upper half and lower half and outer shell lower half wall temperature thermocouple, it is outer for monitoring
The upper half wall temperature and lower half wall temperature of cylinder, in the reasonable scope by the control of the temperature difference of upper half wall temperature and lower half wall temperature, it is ensured that unit peace
Full stable operation.
Furthermore, medium pressure inner casing is welding assembly, and positioned at the inside of outer shell, reheated steam is isolated with outer shell
It opens, reduces the thermal stress of outer shell, while IP inner casing and reheaing steam pipe are sealed by sealing ring, prevent reheated steam
Leakage causes outer shell wall temperature and three steam pumping overtemperatures in the clip cavity between IP inner casing and outer shell, influence unit safety operation and
Economy.
Furthermore, the aperture of the electric control valve is 0 to 100%, according to the upper half and lower half wall temperature difference of outer shell
Actual conditions be adjusted, the operations staff of unit adjusts its aperture in a central station of floating dock distant place, it is ensured that half and lower half on outer shell
The temperature difference of wall is in the reasonable scope.
The lower half of outer shell is arranged in reheaing steam pipe, is connected by welding to outer shell and is fixed.Unit is starting, is stopping
During machine and varying duty, occur different degrees of leakage at the sealing of reheaing steam pipe and IP inner casing, while unit
Operating status is different, and the parameter of steam also will appear certain difference, when the wall temperature of outer shell lower half is higher than upper half wall temperature, operation
Personnel can remote operation electric control valve, by the aperture of the outer shell difference feedback control electric control valve of half wall temperature up and down, really
The difference of outer shell half wall temperature up and down is protected in reasonable scope of design, guarantees the safe and stable operation of unit.
The assembly method following steps of the big system of the casing wall temperature difference above and below above-mentioned solution Steam Turbine Through IP Admission:
Step 1: cutting hole for scene is carried out the communicating pipe above outer shell steam drain position；
Second step, the bolt that spot dynamic balance hole flange is connect with outer shell, cover nut, lower peripheral surface washer and upper ball ring
Circle removes, and carries out cutting hole to spot dynamic balance hole flange, and then spot dynamic balance hole flange is fixed on outer shell again；
Third step welds the tapping of one end of steam guiding tube and communicating pipe, by the other end of steam guiding tube and scene
The tapping of dynamic balancing hole flange is welded, and the both ends of horizontal position and electric control valve among steam guiding tube are welded
It connects；
The controlling cable of electric control valve is carried out in-site installation, is connected to the control system of unit by the 4th step.
The utility model compared with prior art, has the following advantages that and effect: the utility model has the advantages of simple structure rationally,
It can be realized at the scene by being transformed；All components of the utility model can loose mail be transported to scene, with communicating pipe, outer shell etc. one
It rises and carries out live positioning, determine after good position at the scene by being welded into an entirety, it is easy to assembly.
Detailed description of the invention
Fig. 1 is the overlooking structure diagram of the utility model embodiment.
Fig. 2 is the main view the schematic diagram of the section structure of the utility model embodiment.
Fig. 3 is the steam guiding tube of the utility model embodiment and the attachment structure schematic diagram of cylinder.
In figure: outer shell 1, IP inner casing 2, outer shell upper half wall temperature thermocouple 3, outer shell lower half wall temperature thermocouple 4, steam guiding tube 5,
Electric control valve 6, communicating pipe 7, cover nut 8, bolt 9, spot dynamic balance hole flange 10, lower peripheral surface washer 11, upper spheric washer
12。
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1 to Fig. 3, the big system of the casing wall temperature difference above and below the solution Steam Turbine Through IP Admission in the present embodiment, including it is outer
Cylinder 1 and IP inner casing 2, IP inner casing 2 are located in outer shell 1；It further include outer shell upper half wall temperature thermocouple 3, outer shell lower half wall temperature heat
Galvanic couple 4, steam guiding tube 5, electric control valve 6, communicating pipe 7 and spot dynamic balance hole flange 10；Outer shell upper half wall temperature thermocouple 3 is installed
Vapour position is pressed into 1 upper half of outer shell, outer shell lower half wall temperature thermocouple 4 is mounted on the lower half of outer shell 1；The setting of communicating pipe 7 exists
At the steam drain of outer shell 1, communicating pipe 7 is provided with hole, for connecting steam guiding tube 5；Spot dynamic balance hole flange 10 is fixed on outer shell 1
At upper half steam drain, spot dynamic balance hole flange 10 is also provided with hole, for connecting steam guiding tube 5；One end of steam guiding tube 5 and communicating pipe
7 connections, the other end of steam guiding tube 5 are connect with spot dynamic balance hole flange 10, and electric control valve 6 is equipped on steam guiding tube 5；Outer shell
Upper half wall temperature thermocouple 3, outer shell lower half wall temperature thermocouple 4 and electric control valve 6 are connected to the control system of unit.
Spot dynamic balance hole flange 10 is fixed by bolt 9 and outer shell 1, and bolt 9 passes through lower peripheral surface washer 11 and upper spherical surface
Washer 12 is inserted into outer shell 1, and lower peripheral surface washer 11 is contacted with outer shell 1, and upper spheric washer 12 is located on lower peripheral surface washer 11, bolt
9 top is equipped with cover nut 8.
Outer shell 1 be HP-IP combined casing, high-pressure admission and in be pressed into the middle position that vapour is respectively positioned on outer shell 1, in be pressed into steam pipe
Road is positioned only at the lower half of outer shell 1, and steam is pressed into intermediate pressure section in the entrance of steam pipe road in, arranges after acting through 1 upper half tail portion of outer shell
Out；It is pressed into vapour position in outer shell 1 and is provided with High inter case spot dynamic balance hole, balance weight is added to by height by specific purpose tool
On a certain position of middle pressure rotor, plays the role of balancing rotor eccentricity power, pass through spot dynamic balance hole flange when unit is run
10 are sealed the High inter case spot dynamic balance hole, prevent steam leakage；Vapour position, cylinder are pressed into outer shell 1
The respectively arranged outer shell upper half wall temperature thermocouple 3 of upper half and lower half and outer shell lower half wall temperature thermocouple 4, for monitoring outer shell 1
Upper half wall temperature and lower half wall temperature, in the reasonable scope by the control of the temperature difference of upper half wall temperature and lower half wall temperature, it is ensured that unit safety is steady
Fixed operation.
IP inner casing 2 is welding assembly, and positioned at the inside of outer shell 1, reheated steam is kept apart with outer shell 1, reduces outer shell 1
Thermal stress, while IP inner casing 2 and reheaing steam pipe are sealed by sealing ring, prevent reheated steam from leaking to IP inner casing
In clip cavity between 2 and outer shell 1, causes 1 wall temperature of outer shell and three steam pumping overtemperatures, influence unit safety operation and economy.
The aperture of electric control valve 6 is 0 to 100%, and controlling cable is connected to the control system of unit, and in central station of floating dock
Button is set in control interface, carries out distant place control convenient for operations staff.According to the reality of the upper half of outer shell 1 and lower half wall temperature difference
Border situation is adjusted, and the operations staff of unit adjusts its aperture in a central station of floating dock distant place, it is ensured that half and lower half on outer shell 1
The temperature difference is in the reasonable scope.
The assembly method of the big system of the casing wall temperature difference includes the following steps: above and below above-mentioned solution Steam Turbine Through IP Admission
Step 1: hole is cut at 7 scene of progress of communicating pipe above 1 steam drain position of outer shell；
Second step, the bolt 9 that spot dynamic balance hole flange 10 is connect with outer shell 1, cover nut 8, lower peripheral surface washer 11 and
Upper spheric washer 12 removes, and carries out cutting hole to spot dynamic balance hole flange 10, then again that spot dynamic balance hole flange 10 is fixed
To outer shell 1；
Third step welds one end of steam guiding tube 5 and the tapping of communicating pipe 7, by the other end of steam guiding tube 5 and now
The tapping of dynamic balancing hole flange 10 is welded, by the both ends of horizontal position and electric control valve 6 among steam guiding tube 5 into
Row welding；
The controlling cable of electric control valve 6 is carried out in-site installation, is connected to the control system of unit by the 4th step.
System in this implementation can be suitable for different types of steam turbine.
Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (4)
- The Steam Turbine Through IP Admission big system of the casing wall temperature difference, including outer shell and IP inner casing up and down is solved 1. a kind of, in medium pressure Cylinder is located in outer shell；It is characterized in that, further including outer shell upper half wall temperature thermocouple, outer shell lower half wall temperature thermocouple, steam guiding tube, electricity Dynamic regulating valve, communicating pipe and spot dynamic balance hole flange；Middle pressure of the outer shell upper half wall temperature the installation of TC in outer shell upper half Into vapour position, lower half of the outer shell lower half wall temperature the installation of TC in outer shell；The steam drain of outer shell is arranged in the communicating pipe Place, the communicating pipe is provided with hole, for connecting steam guiding tube；Spot dynamic balance hole flange is fixed on the upper half steam drain of outer shell Place, spot dynamic balance hole flange is also provided with hole, for connecting steam guiding tube；One end of the steam guiding tube is connect with communicating pipe, The other end of the steam guiding tube and spot dynamic balance hole flanged joint are equipped with electric control valve on the steam guiding tube；It is described outer Cylinder upper half wall temperature thermocouple, outer shell lower half wall temperature thermocouple and electric control valve are connected to the control system of unit.
- 2. according to claim 1 solve the Steam Turbine Through IP Admission big system of the casing wall temperature difference up and down, which is characterized in that described Spot dynamic balance hole flange is fixed by bolt and outer shell, and the bolt is inserted into outer shell by lower peripheral surface washer and upper spheric washer Interior, the lower peripheral surface washer is contacted with outer shell, and the upper spheric washer is located on lower peripheral surface washer, the top installation of the bolt There is cover nut.
- 3. according to claim 1 solve the Steam Turbine Through IP Admission big system of the casing wall temperature difference up and down, which is characterized in that described Outer shell is HP-IP combined casing, high-pressure admission and in be pressed into the middle position that vapour is respectively positioned on outer shell, in be pressed into steam pipe road and be positioned only at The lower half of outer shell, steam are pressed into intermediate pressure section in the entrance of steam pipe road in, are discharged after acting through outer shell upper half tail portion；The middle pressure of outer shell Vapour position is provided with High inter case spot dynamic balance hole.
- 4. according to claim 1 solve the Steam Turbine Through IP Admission big system of the casing wall temperature difference up and down, which is characterized in that described IP inner casing is welding assembly, and positioned at the inside of outer shell, reheated steam is kept apart with outer shell, reduces the thermal stress of outer shell, simultaneously IP inner casing and reheaing steam pipe are sealed by sealing ring, prevent reheated steam from leaking between IP inner casing and outer shell In clip cavity, causes outer shell wall temperature and three steam pumping overtemperatures, influence unit safety operation and economy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821465617.0U CN209100097U (en) | 2018-09-07 | 2018-09-07 | A kind of system that the upper and lower casing wall temperature difference of solution Steam Turbine Through IP Admission is big |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821465617.0U CN209100097U (en) | 2018-09-07 | 2018-09-07 | A kind of system that the upper and lower casing wall temperature difference of solution Steam Turbine Through IP Admission is big |
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| Publication Number | Publication Date |
|---|---|
| CN209100097U true CN209100097U (en) | 2019-07-12 |
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ID=67152189
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821465617.0U Active CN209100097U (en) | 2018-09-07 | 2018-09-07 | A kind of system that the upper and lower casing wall temperature difference of solution Steam Turbine Through IP Admission is big |
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| CN (1) | CN209100097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083703A (en) * | 2018-09-07 | 2018-12-25 | 华电电力科学研究院有限公司 | A kind of system and its assembly method that the upper and lower casing wall temperature difference of solution Steam Turbine Through IP Admission is big |
-
2018
- 2018-09-07 CN CN201821465617.0U patent/CN209100097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083703A (en) * | 2018-09-07 | 2018-12-25 | 华电电力科学研究院有限公司 | A kind of system and its assembly method that the upper and lower casing wall temperature difference of solution Steam Turbine Through IP Admission is big |
| CN109083703B (en) * | 2018-09-07 | 2023-07-25 | 华电电力科学研究院有限公司 | System for solving problem of large temperature difference between upper cylinder wall and lower cylinder wall of pressure cylinder in steam turbine and assembly method thereof |
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