CN217501754U - Steam spraying device for last-stage blade of low-pressure cylinder of steam turbine - Google Patents
Steam spraying device for last-stage blade of low-pressure cylinder of steam turbine Download PDFInfo
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- CN217501754U CN217501754U CN202221474198.3U CN202221474198U CN217501754U CN 217501754 U CN217501754 U CN 217501754U CN 202221474198 U CN202221474198 U CN 202221474198U CN 217501754 U CN217501754 U CN 217501754U
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Abstract
The utility model relates to a spout vapour device for steam turbine low-pressure cylinder last stage blade, include: the pressure-equalizing steam spraying assembly is arranged in a low-pressure cylinder of the steam turbine; the pressure-equalizing steam injection assembly comprises a plurality of pressure-equalizing steam injection boxes, and the pressure-equalizing steam injection boxes are arranged close to the inner wall of the low-pressure cylinder of the steam turbine; the pressure equalizing steam injection boxes are connected with an external steam source and used for injecting superheated steam into the low-pressure cylinder of the steam turbine when the load of the steam turbine is lower than 50% of rated load; the pressure-equalizing steam-spraying component is arranged on the inner wall of the low-pressure cylinder of the steam turbine, and the pressure-equalizing steam-spraying component uniformly sprays proper amount of superheated steam into the low-pressure cylinder of the steam turbine; therefore, the steam flow in the last-stage or next-stage blade area of the low-pressure cylinder of the steam turbine is increased, and water drops generated in the last-stage or next-stage blade area of the low-pressure cylinder of the steam turbine due to high steam humidity are prevented from corroding the last-stage or next-stage blade of the low-pressure cylinder of the steam turbine.
Description
Technical Field
The utility model relates to a steam turbine technical field especially relates to a spout vapour device that is used for steam turbine low-pressure cylinder last stage blade.
Background
The working environments of the impeller blades in the last stage, the second last stage and other regions of the low-pressure cylinder of the steam turbine of the coal-fired power plant are in saturated steam regions, and the steam humidity reaches 7.5-25%; when the load of the steam turbine is lower than 50% of rated load, the flow rate of through-flow steam is reduced, the steam flow is too small to push the steam to flow, and the blowing phenomenon occurs in a part of areas, so that the steam humidity of the working area of the impeller in the area of the low-pressure cylinder close to the steam outlet is further increased. The last-stage moving blade of the high-capacity steam turbine rotates at a high speed under the condition of wet steam, the linear speed of the blade top can reach supersonic speed, and water drops erode in the areas such as the surface and the edge of the blade of the impeller after the blade collides with the water drops for a long time; after water erosion occurs, the smooth surface of the blade becomes uneven, the working capacity is reduced when steam flows through the blade channel, and the energy consumption loss is increased; the severe water erosion problem can cause the strength of the blade to be reduced, the blade to be broken and the safety and the economical efficiency of the steam turbine to be influenced.
The conventional technology for the steam inlet edge water erosion prevention protection of the last-stage moving blade of the steam turbine comprises the technologies of brazing stellite alloy sheets, induction quenching, electric spark strengthening, flame quenching, laser quenching hardening, laser cladding, thermal spraying strengthening and the like, and the water erosion problem of the last-stage blade of the low-pressure cylinder cannot be solved by the conventional technology. When the current steam turbine is operated for a long time under the condition that the load is 50% of rated load or below, the effect of the protection measures is weakened, the problem of serious water erosion of the moving blades still occurs, and the safety of the steam turbine is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming the water erosion problem of steam turbine low pressure cylinder last stage or penultimate stage blade among the prior art to a steam jet equipment for steam turbine low pressure cylinder last stage blade is provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a steam injection apparatus for a last stage blade of a low pressure cylinder of a steam turbine, comprising: the pressure-equalizing steam spraying assembly is arranged in a low-pressure cylinder of the steam turbine;
wherein the pressure-equalizing steam-jet component comprises a plurality of pressure-equalizing steam-jet boxes,
the pressure equalizing steam injection boxes are arranged close to the inner wall of the low-pressure cylinder of the steam turbine;
and the pressure equalizing steam injection boxes are connected with an external steam source and are used for injecting superheated steam into the low-pressure cylinder of the steam turbine when the load of the steam turbine is lower than 50% of rated load.
Preferably, the pressure equalizing steam jet box is an arc-shaped structural member,
the arc-shaped structural part is provided with one surface facing to the inner wall of the low-pressure cylinder of the steam turbine and one surface facing to the blade,
and one surface of the pressure equalizing steam injection box facing the inner wall of the low pressure cylinder of the steam turbine is provided with a steam inlet,
one surface of the pressure-equalizing steam injection box, which is back to the blades, is provided with a steam injection port;
superheated steam of the steam source enters from the steam inlet and is sprayed out from the steam spraying port.
Preferably, the pressure equalizing and steam spraying assembly further comprises a main steam pipe, two primary steam branch pipes and a plurality of secondary steam branch pipes,
one end of the main steam pipe is communicated with the two primary branch steam pipes, and the other end of the main steam pipe is communicated with the steam source;
one ends of the secondary branch steam pipes are communicated with the steam inlets in a one-to-one correspondence mode, and the other ends of the secondary branch steam pipes penetrate through the inner wall of the low-pressure cylinder of the steam turbine and are communicated with the two primary branch steam pipes respectively.
Preferably, the pressure equalizing and steam spraying assembly further comprises a plurality of supports, and the supports are uniformly distributed on the inner wall of the low-pressure cylinder of the steam turbine;
and the two ends of the pressure-equalizing steam injection box are fixedly connected with the bracket.
Preferably, the pressure equalizing and steam spraying assembly is further provided with a control valve and a pressure gauge;
the control valve includes a main control valve and a plurality of branch control valves,
the main control valve is arranged on the main steam pipe and is positioned between the steam source and the two first-stage branch steam pipes,
the branch control valves are arranged on the secondary branch steam pipes in a one-to-one correspondence manner;
the pressure gauge comprises a total pressure gauge and a plurality of branch pressure gauges,
the total pressure gauge is arranged between the main control valve and the two primary branch steam pipes,
a plurality of branch pressure gauges are arranged in one-to-one correspondence with the secondary branch steam pipes,
and a plurality of branch pressure gauges are arranged between the branch control valve and the pressure-equalizing steam injection box.
Preferably, the system further comprises a control system, wherein the control system is a PLC system or a DCS system;
the PLC system is respectively connected with the control valve and the pressure gauge by signals,
or
And the DCS is respectively in signal connection with the control valve and the pressure gauge.
Preferably, the control valve is a pneumatic control valve or an electric control valve.
Preferably, the pressure gauge is an intelligent digital pressure gauge.
Compared with the prior art, the beneficial effects of the utility model reside in that:
according to the steam spraying device for the last-stage blade of the low-pressure cylinder of the steam turbine, the pressure-equalizing steam spraying assembly is arranged on the inner wall of the low-pressure cylinder of the steam turbine, and proper amount of superheated steam is uniformly sprayed into the low-pressure cylinder of the steam turbine through the pressure-equalizing steam spraying assembly; therefore, the steam flow in the last-stage or next-stage blade area of the low-pressure cylinder of the steam turbine is increased, and water drops generated in the last-stage or next-stage blade area of the low-pressure cylinder of the steam turbine due to high steam humidity are prevented from corroding the last-stage or next-stage blade of the low-pressure cylinder of the steam turbine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a steam turbine low pressure cylinder and a pressure-equalizing steam injection assembly provided in an embodiment of the present invention.
Fig. 2 is another schematic structural diagram of the low pressure cylinder and the pressure equalizing steam injection assembly of the steam turbine shown in fig. 1.
FIG. 3 is a schematic diagram of the operation of an equalizing steam injection assembly according to another embodiment.
Description of reference numerals:
1. a pressure-equalizing steam jet box; 11. a steam inlet; 12. a support;
21. a main steam pipe; 211. a main control valve; 212. a total pressure gauge; 22. a first-stage branch steam pipe; 23. a secondary branch steam pipe; 231. a branch control valve; 232. a branch pressure gauge;
3. a source of steam;
4. a blade region;
5. a first heater; 51. a check valve I; 52. a first electric stop valve; 53. a water side bypass valve;
6. a second heater; 61. a second check valve; 62. a second electric stop valve;
7. a third heater; 71. a third check valve; 72. a third electric stop valve;
8. a fourth heater; 81. a check valve No. four; 82. a fourth electric stop valve;
9. and (4) a hydrophobic regulating valve.
100. A deaerator; 101. a feed pump; 102. a coagulation pump; 103. a condenser; 104. circulating water; 105. a low-pressure cylinder of the steam turbine; 106. an extraction annulus.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the utility model provides a steam jet equipment for 105 last stage blades of steam turbine low pressure cylinder, as shown in fig. 1 and fig. 2, including the pressure-equalizing steam jet subassembly of installing in steam turbine low pressure cylinder 105, the pressure-equalizing steam jet subassembly is used for providing superheated steam for steam turbine low pressure cylinder 105; the pressure equalizing steam injection assembly comprises a plurality of pressure equalizing steam injection boxes 1; the pressure-equalizing steam injection boxes 1 are arranged close to the inner wall of the steam turbine low-pressure cylinder 105, superheated steam can be uniformly sprayed out of the pressure-equalizing steam injection boxes conveniently, the pressure-equalizing steam injection boxes 1 are connected with the external steam source 3 and used for spraying the superheated steam into the steam turbine low-pressure cylinder 105 when the load of the steam turbine is lower than 50% of rated load, and therefore the steam flow of the last-stage or next-stage blade area 4 of the steam turbine low-pressure cylinder 105 is increased.
Specifically, a plurality of pressure equalizing steam injection boxes 1 are arranged close to the inner wall of the steam turbine low pressure cylinder 105; when the load of the steam turbine is lower than 50% of rated load, the steam source 3 provides superheated steam to the pressure equalizing steam injection boxes 1, and the superheated steam is uniformly injected into the low pressure cylinder 105 of the steam turbine through the pressure equalizing boxes; and after the sprayed superheated steam is converged into the tail section of the low-pressure turbine cylinder 105, the exhaust steam flow of the last-stage or next-to-last-stage blade area 4 of the low-pressure turbine cylinder 105 is adjusted, so that water drops generated by high steam humidity in the last-stage or next-to-last-stage blade area 4 of the low-pressure turbine cylinder 105 are avoided, and the last-stage or next-to-last-stage blade area 4 of the low-pressure turbine cylinder 105 is corroded to cause damage to the physical structure of the blade.
Specifically, the pressure equalizing steam injection box 1 is an arc-shaped structural member, and is convenient to be fixedly arranged in a steam extraction annular space 106 in the low-pressure cylinder 105 of the steam turbine; the pressure equalizing steam injection box 1 of the arc-shaped structural member is provided with one surface facing the inner wall of the steam turbine low pressure cylinder 105 and one surface facing the blade area 4, a steam inlet 11 is formed in one surface of the pressure equalizing steam injection box 1 facing the inner wall of the steam turbine low pressure cylinder 105, and a steam outlet (not shown) is formed in one surface of the pressure equalizing steam injection box 1 facing the blade area 4; wherein, the steam inlet 11 is used for collecting and storing superheated steam in the pressure equalizing steam jet box 1, and the steam jet (not shown) is used for ejecting the collected and stored superheated steam to the steam extraction annular space 106 inside the steam turbine low pressure cylinder 105 so as to adjust the steam discharge flow of the last stage or the next last stage blade area 4 of the steam turbine low pressure cylinder 105; furthermore, the superheated steam of the steam source 3 enters the pressure equalizing steam jet box 1 through the steam inlet 11 and is sprayed out from the steam jet port when the load of the steam turbine is lower than 50% of the rated load.
More specifically, the superheated steam of the steam source 3 is input into the pressure equalizing steam jet box 1 through the steam inlet 11, and when the load of the steam turbine is lower than 50% of the rated load, the superheated steam is ejected through the steam jet ports (not shown) of the pressure equalizing steam jet box 1, so as to adjust the steam discharge flow of the last-stage blade area 4 and the next-stage blade area 4 of the low pressure cylinder 105 of the steam turbine.
Specifically, the steam injection assembly further comprises a main steam pipe 21, two primary steam branch pipes 22 and a plurality of secondary steam branch pipes 23; wherein, the main steam pipe 21, the primary branch steam pipe 22 and the secondary branch steam pipe 23 are all used for transmitting superheated steam; one end of the main steam pipe 21 is communicated with the two primary branch steam pipes 22, and the other end is communicated with the steam source 3; one ends of the secondary branch steam pipes 23 are correspondingly communicated with the steam inlets 11 one by one, and the other ends of the secondary branch steam pipes penetrate through the inner wall of the steam turbine low-pressure cylinder 105 and are respectively communicated with the two primary branch steam pipes 22; more specifically, the superheated steam is output from the steam source 3, flows through the main steam pipe 21, is divided by the two primary branch steam pipes 22, is respectively input into the plurality of secondary branch steam pipes 23, and is finally communicated with the steam inlet 11 of the pressure-equalizing steam jet box 1 through the plurality of secondary branch steam pipes 23 and is input into the superheated steam.
Specifically, the pressure-equalizing steam injection assembly further comprises a plurality of supports 12, the plurality of supports 12 are uniformly distributed on the inner wall of the steam turbine low-pressure cylinder 105, and two ends of the pressure-equalizing steam injection box 1 are fixedly connected with the supports 12; furthermore, the support 12 is fixed at both ends of the pressure equalizing box and used for reinforcing the connection strength between the secondary branch steam pipe 23 and the steam inlet 11 and preventing the loosening of the connection part of the steam inlet 11 when the superheated steam of the steam source 3 enters the pressure equalizing box or the pressure equalizing box in the steam injection process.
Specifically, the pressure-equalizing steam injection assembly is also provided with a control valve and a pressure gauge, wherein the control valve is used for controlling the on-off of the steam pipe, and the pressure gauge is used for monitoring the pressure information of the superheated steam in the steam pipe; further, the control valve includes a main control valve 211 and a plurality of branch control valves 231, the main control valve 211 is disposed on the main steam pipe 21, the main control valve 211 is used for controlling the flow rate of the superheated steam in the main steam pipe 21, and the main control valve 211 is disposed between the steam source 3 and the two primary branch steam pipes 22; the branch control valves 231 are arranged in one-to-one correspondence with the secondary branch steam pipes 23, and the main control valve 211 is used for controlling the flow of the superheated steam in the main steam pipe 21; furthermore, the pressure gauge comprises a total pressure gauge 212 and a plurality of branch pressure gauges 232, wherein the total pressure gauge 212 is arranged between the main control valve 211 and the two primary branch steam pipes 22, so that a worker can conveniently adjust the opening degree of the main control valve 211 according to pressure parameters displayed by the total pressure gauge 212; the plurality of branch pressure gauges 232 are arranged in one-to-one correspondence with the secondary branch steam pipes 23, the branch pressure gauges 232 are used for detecting pressure parameters of superheated steam in the plurality of secondary branch steam pipes 23, and the plurality of branch pressure gauges 232 are all arranged between the branch control valve 231 and the pressure-equalizing steam injection box, so that a worker can conveniently adjust and control the opening degree of the branch control valve 231 according to the pressure parameters displayed by the branch pressure gauges 232, and the superheated steam is uniformly injected into the steam turbine low pressure cylinder 105 through the secondary branch steam pipes 23.
In one embodiment, the steam injection device for the last blade of the low pressure cylinder 105 of the steam turbine further comprises a Control System, wherein the Control System is a PLC (Programmable Logic Controller) System or a DCS (Distributed Control System); further, the PLC system is respectively in signal connection with the control valve and the pressure gauge, or the DCS system is respectively in signal connection with the control valve and the pressure gauge; preferably, the main control valve 211 and the plurality of branch control valves 231 used in cooperation with the PLC system or the DCS system are pneumatic control valves or electric control valves, and the master pressure gauge 212 and the plurality of branch pressure gauges 232 are intelligent digital pressure gauges.
Namely when a control system, an intelligent digital pressure gauge and a pneumatic control valve or an electric control valve are not equipped; for the main steam pipe 21, a worker manually adjusts the opening degree of the main control valve 211 according to the pressure parameter displayed by the master pressure gauge 212; for the plurality of secondary branch steam pipes 23, the worker manually adjusts and controls the opening of the branch control valve 231 according to the pressure parameter displayed by the branch pressure gauge 232, and superheated steam is uniformly sprayed into the turbine low-pressure cylinder 105 through each secondary branch steam pipe 23; when a control system, an intelligent digital pressure gauge and a pneumatic control valve or an electric control valve are equipped, for the main steam pipe 21, a worker automatically adjusts the opening degree of the main control valve 211 by using a control loop of a PLC system or a DCS system through tracking a pressure feedback value of the total pressure gauge 212; for the plurality of secondary branch steam pipes 23, the worker tracks the pressure feedback value displayed by the branch pressure gauge 232, the opening of the branch control valve 231 is automatically adjusted and controlled by using a control loop of the PLC system or the DCS system, and superheated steam is uniformly sprayed into the steam turbine low-pressure cylinder 105 through each secondary branch steam pipe 23, so that the operation is convenient, rapid, time-saving and labor-saving.
As shown in fig. 3, taking a conventional subcritical 300MW unit low pressure cylinder and a condensed water thermodynamic system as an example, when the load is lower than 50% of the rated load and runs for a long time, the pressure equalizing steam injection assembly is opened to supplement the steam flow to the turbine low pressure cylinder 105; according to the arrangement situation of the steam extraction of the low-pressure cylinder in the conventional design (in the case that the pressure equalizing steam injection assembly is arranged in the steam extraction annular space 106 in the low-pressure cylinder 105 of the steam turbine), before the pressure equalizing steam injection assembly is operated, the first check valve 51 and the first electric stop valve 52 of the first heater 5 on the steam extraction pipeline are closed in advance; keeping a second check valve 61 and a second electric stop valve 62 of a second heater 6 on a steam extraction pipeline, a third check valve 71 and a third electric stop valve 72 of a third heater 7 on the steam extraction pipeline, and a fourth check valve 81 and a fourth electric stop valve 82 of a fourth heater 8 on the steam extraction pipeline in an open state, namely keeping the heating functions of the second heater 6, the third heater 7 and the fourth heater 8 on the condensed water; after the first heater 5 completely exits the steam extraction function, the main control valve 211 on the main steam pipe 21 of the pressure equalizing steam injection device is opened, the main control valve 211 is adjusted to a proper opening degree by observing the pressure parameters on the total pressure gauge 212, so that superheated steam flows into the plurality of secondary steam branch pipes 23 from the two primary steam branch pipes 22, the branch pressure gauges 232 on the secondary steam branch pipes 23 are observed to adjust the branch control valves 231 to actual required operation parameters, and the steam injection work on the steam turbine low pressure cylinder 105 is completed.
In another embodiment, when the steam turbine is provided with a plurality of low pressure cylinders, aiming at the condition that the first heater 5 in the condensed water thermodynamic system is not provided with the first check valve 51 and the first electric stop valve 52, the opening degree of the first water side bypass valve 53 of the first heater 5 is adjusted to be slowly increased, and finally the steam extraction amount of the first heater 5 is reduced to no flow, namely the steam extraction function is completely withdrawn; then, a steam supply pipeline of the pressure equalizing steam injection device is opened, and steam supplementing work is performed on the steam turbine low pressure cylinder 105.
In addition, when the steam turbine low-pressure cylinder 105 performs steam exhaust, the low-pressure exhaust steam of the steam turbine enters the condenser 103, is cooled and condensed by the inlet water of the circulating water 104, is conveyed by the condensate pump 102 (condensate pump) and passes through the heaters (the water can also be adjusted and shunted by the drain regulating valve 9) at each stage or the bypass of the heaters, flows into the deaerator 100, finally flows into the high-pressure heater equipment after passing through the water feed pump 101, and finally flows into the boiler.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (8)
1. A steam injection apparatus for the last stage blade of a low pressure cylinder of a steam turbine, comprising: the pressure-equalizing steam spraying assembly is arranged in a low-pressure cylinder of the steam turbine;
wherein the pressure equalizing steam injection assembly comprises a plurality of pressure equalizing steam injection boxes,
the pressure equalizing steam injection boxes are arranged close to the inner wall of the low-pressure cylinder of the steam turbine;
and the pressure equalizing steam injection boxes are connected with an external steam source and are used for injecting superheated steam into the low-pressure cylinder of the steam turbine when the load of the steam turbine is lower than 50% of rated load.
2. The steam injection apparatus for a last stage blade of a low pressure cylinder of a steam turbine as claimed in claim 1, wherein said pressure equalizing steam injection box is an arc-shaped structural member,
the arc-shaped structural member is provided with one surface facing the inner wall of the low-pressure cylinder of the steam turbine and one surface facing the blade,
and one surface of the pressure equalizing steam injection box facing the inner wall of the low pressure cylinder of the steam turbine is provided with a steam inlet,
one surface of the pressure-equalizing steam injection box, which is back to the blades, is provided with a steam injection port;
superheated steam of the steam source enters from the steam inlet and is sprayed out from the steam spraying port.
3. The steam injection apparatus for a last stage blade of a low pressure cylinder of a steam turbine according to claim 2, wherein said pressure equalizing steam injection assembly further comprises a main steam pipe, two primary branch steam pipes and a plurality of secondary branch steam pipes,
one end of the main steam pipe is communicated with the two primary branch steam pipes, and the other end of the main steam pipe is communicated with the steam source;
one ends of the secondary branch steam pipes are communicated with the steam inlets in a one-to-one correspondence mode, and the other ends of the secondary branch steam pipes penetrate through the inner wall of the low-pressure cylinder of the steam turbine and are communicated with the two primary branch steam pipes respectively.
4. The steam injection apparatus for the last stage blade of the low pressure cylinder of the steam turbine according to claim 2, wherein the pressure equalizing steam injection assembly further comprises a plurality of supports, the plurality of supports being uniformly distributed on the inner wall of the low pressure cylinder of the steam turbine;
and the two ends of the pressure-equalizing steam injection box are fixedly connected with the bracket.
5. The steam injection apparatus for the last stage blade of the low pressure cylinder of the steam turbine as claimed in claim 3, wherein the pressure equalizing steam injection assembly is further provided with a control valve and a pressure gauge;
the control valve includes a main control valve and a plurality of branch control valves,
the main control valve is arranged on the main steam pipe and is positioned between the steam source and the two first-stage steam branch pipes,
the branch control valves are arranged on the secondary branch steam pipes in a one-to-one correspondence manner;
the pressure gauge comprises a total pressure gauge and a plurality of branch pressure gauges,
the total pressure gauge is arranged between the main control valve and the two primary branch steam pipes,
a plurality of branch pressure gauges are arranged corresponding to the secondary branch steam pipes one by one,
and a plurality of branch pressure gauges are arranged between the branch control valve and the pressure-equalizing steam injection box.
6. The steam injection apparatus for the last stage blade of the low pressure cylinder of the steam turbine according to claim 5, further comprising a control system, wherein the control system is a PLC system or a DCS system;
the PLC system is respectively connected with the control valve and the pressure gauge by signals,
or
And the DCS is respectively in signal connection with the control valve and the pressure gauge.
7. The steam injection apparatus for a last stage blade of a low pressure cylinder of a steam turbine according to claim 5, wherein the control valve is a pneumatic control valve or an electric control valve.
8. The steam injection apparatus for the last stage blade of a low pressure cylinder of a steam turbine according to claim 5, wherein the pressure gauge is an intelligent digital pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221474198.3U CN217501754U (en) | 2022-06-13 | 2022-06-13 | Steam spraying device for last-stage blade of low-pressure cylinder of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221474198.3U CN217501754U (en) | 2022-06-13 | 2022-06-13 | Steam spraying device for last-stage blade of low-pressure cylinder of steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN217501754U true CN217501754U (en) | 2022-09-27 |
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ID=83359591
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221474198.3U Active CN217501754U (en) | 2022-06-13 | 2022-06-13 | Steam spraying device for last-stage blade of low-pressure cylinder of steam turbine |
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| Country | Link |
|---|---|
| CN (1) | CN217501754U (en) |
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2022
- 2022-06-13 CN CN202221474198.3U patent/CN217501754U/en active Active
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