CN222141341U - Coal-fired generator steam turbine front cylinder casting - Google Patents
Coal-fired generator steam turbine front cylinder casting Download PDFInfo
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- CN222141341U CN222141341U CN202420575111.4U CN202420575111U CN222141341U CN 222141341 U CN222141341 U CN 222141341U CN 202420575111 U CN202420575111 U CN 202420575111U CN 222141341 U CN222141341 U CN 222141341U
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- 238000005266 casting Methods 0.000 title claims abstract description 107
- 238000004321 preservation Methods 0.000 claims abstract description 51
- 238000010248 power generation Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 26
- 230000035939 shock Effects 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
本实用新型公开了一种燃煤发电机组汽轮机前汽缸铸件，包括缸体铸件，缸体铸件包括下缸体铸件和上缸体铸件，下缸体铸件呈矩形结构，上缸体铸件呈弧形结构；下缸体铸件的上端面位于第一弧形凹槽的边缘位置设置有第一定位凹槽和第一定位凸条，上缸体铸件的下端面对准第一定位凹槽位置一体设置有第二定位凸条，上缸体铸件的下端面设置有第二定位凹槽；上缸体铸件的外表面上套设有保温被，保温被的外表面上套设有保温罩，保温罩的内壁面到保温被的外表面之间设置有气囊，气囊的进气管的进气口固定设置有单向阀，单向阀的进口设置有电动气泵。上述技术方案，结构设计合理、装拆操作方便、保温效果好、运行时稳定性好、检修或维护效率高且实用性好。
The utility model discloses a front cylinder casting of a steam turbine of a coal-fired power generation unit, including a cylinder casting, the cylinder casting including a lower cylinder casting and an upper cylinder casting, the lower cylinder casting is a rectangular structure, and the upper cylinder casting is an arc structure; the upper end surface of the lower cylinder casting is located at the edge of the first arc groove and is provided with a first positioning groove and a first positioning convex strip, the lower end surface of the upper cylinder casting is aligned with the first positioning groove and is integrally provided with a second positioning convex strip, and the lower end surface of the upper cylinder casting is provided with a second positioning groove; a heat preservation blanket is sleeved on the outer surface of the heat preservation blanket, a heat preservation cover is sleeved on the outer surface of the heat preservation blanket, an air bag is arranged between the inner wall surface of the heat preservation cover and the outer surface of the heat preservation blanket, a one-way valve is fixedly arranged at the air inlet of the air inlet pipe of the air bag, and an electric air pump is arranged at the inlet of the one-way valve. The above technical scheme has reasonable structural design, convenient assembly and disassembly operation, good heat preservation effect, good stability during operation, high efficiency of overhaul or maintenance, and good practicality.
Description
Technical Field
The utility model relates to the technical field of turbines, in particular to a front cylinder casting of a turbine of a coal-fired power generation unit.
Background
The steam turbine is a rotary power machine that converts steam into mechanical work, also known as a steam turbine. The cylinder is a shell of the steam turbine, and is used for separating the recuperation part of the steam turbine from the atmosphere to form a closed steam chamber so as to ensure that the steam completes the energy conversion process in the steam turbine. Wherein during the use, due to faults or the need of replacement, the cylinder needs to be disassembled, and the internal parts are overhauled or replaced.
Through retrieving chinese patent publication No. CN217029042U, a steam turbine cylinder is disclosed, which comprises a cylinder body, annular limiting grooves are provided at the front and back ends of the cylinder body, a plurality of locating holes are provided on the annular limiting grooves, the two ends of the cylinder body are provided with end covers, the end covers are sleeved on the cylinder body, the positions of the end covers corresponding to the locating holes are provided with mounting grooves, a limiting block is connected in the mounting grooves in a sliding manner, one end of the limiting block is fixed with a locating column, the other end of the adjusting rod penetrates through the end covers, the cylinder body comprises a left cylinder body and a right cylinder body, the upper end and the lower end of the left cylinder body are respectively provided with a left ladder-shaped notch, a groove is provided in the left ladder-shaped notch, the upper end and the lower end of the right cylinder body are respectively provided with a right ladder-shaped notch, and a convex strip is provided in the right ladder-shaped notch. The design of the left cylinder body and the right cylinder body can realize the disassembly of the cylinder body, and after the cylinder body is opened, a larger operation space is provided for overhauling, so that the overhauling is convenient.
The cylinder structure has certain defects in practical use, such as unreasonable structural design, relatively heavy cylinder weight, left ladder-shaped notch on the upper and lower ends of the left cylinder body, groove in the left ladder-shaped notch, right ladder-shaped notch on the upper and lower ends of the right cylinder body, raised strips in the right ladder-shaped notch, matching of the left ladder-shaped notch and the right ladder-shaped notch, and matching of the grooves and the raised strips, troublesome assembly and disassembly, low maintenance or repair efficiency, unreliable positioning, easy vibration of the cylinder, poor stability in operation, limited heat preservation effect of the structure, and inconvenience in replacing the heat preservation by staff.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model aims to provide the front cylinder casting of the steam turbine of the coal-fired power generation unit, which has the advantages of reasonable structural design, convenient assembly and disassembly operation, good heat preservation effect, good stability during operation, high overhaul or maintenance efficiency and good practicability.
The technical scheme is that the front cylinder casting of the steam turbine of the coal-fired power generating unit comprises a cylinder casting, wherein the cylinder casting comprises a lower cylinder casting and an upper cylinder casting, the lower cylinder casting is of a rectangular structure, the upper cylinder casting is of an arc structure, a first arc-shaped groove with an upward opening is formed in the middle of the upper end face of the lower cylinder casting, a second arc-shaped groove with a downward opening is formed in the position, aligned to the first arc-shaped groove, of the lower end face of the upper cylinder casting, the lower cylinder casting and the upper cylinder casting are detachably connected, and the first arc-shaped groove and the second arc-shaped groove form a cylinder cavity together;
A first positioning groove and a first positioning convex strip are formed in the edge position of the upper end face of the lower cylinder body casting, which is located at the first arc-shaped groove, and a first sealing groove is formed in the inner bottom face of the first positioning groove; the lower end face of the upper cylinder body casting is provided with a second positioning convex strip in an integral manner aiming at the position of the first positioning convex strip, and a second positioning groove is arranged in the lower end face of the upper cylinder body casting in an integral manner aiming at the position of the first positioning convex strip, and a second sealing groove is arranged in the second positioning groove;
The upper cylinder body casting is characterized in that a heat preservation quilt is sleeved on the outer surface of the upper cylinder body casting, a heat preservation cover is sleeved on the outer surface of the heat preservation quilt, an air bag is arranged between the inner wall surface of the heat preservation cover and the outer surface of the heat preservation quilt, the air bag is of an arc-shaped structure, the left lower end of the air bag is integrally provided with an air inlet pipe, an air inlet of the air inlet pipe is fixedly provided with a one-way valve, an electric air pump is arranged at an inlet of the one-way valve, the air bag is inflated through the electric air pump, and then the outer surface of the heat preservation quilt is compressed, so that the inner wall surface of the heat preservation quilt compresses the outer surface of the upper cylinder body casting.
The utility model is further characterized in that the right lower end of the air bag is provided with an exhaust pipe, and an air outlet of the exhaust pipe is provided with a sealing screw cover.
The utility model is further characterized in that a first elastic sealing strip is arranged in the first sealing groove, a second elastic sealing strip is arranged in the second sealing groove, a plurality of positioning convex blocks are integrally arranged at the lower end of the upper cylinder body casting, a fixing bolt is arranged on each positioning convex block, and the upper cylinder body casting is locked on the upper end face of the lower cylinder body casting through the fixing bolt.
The utility model is further characterized in that the heat-insulating cover is made of stainless steel, and the lower end of the heat-insulating cover is fixedly connected with the upper end face of the lower cylinder body casting through bolts.
The utility model is further characterized in that the outer surface of the air bag is connected with the heat preservation cover through a magic tape, and an air pressure sensor is arranged in the air bag and is connected with the electric air pump through a wire.
The lower cylinder body casting die is characterized in that the bottom of the lower cylinder body casting is provided with a plurality of height adjusting devices, each height adjusting device comprises a screw rod, a bottom plate and a rubber shock pad, the bottom of the lower cylinder body casting is provided with a plurality of adjusting screw holes with downward openings, the lower port of each adjusting screw hole is provided with a bottom plate embedded groove, the upper end of the screw rod is in threaded connection with the aligned adjusting screw holes, the lower end of the screw rod is integrally arranged with the bottom plate, and the lower end face of the bottom plate is fixedly adhered to the upper end face of the rubber shock pad.
Compared with the prior art, the utility model has the beneficial effects that the structural design is reasonable, when the upper cylinder body casting is mounted on the upper end surface of the lower cylinder body casting, the first positioning convex strip on the lower end surface of the upper cylinder body casting is inserted into the first positioning groove on the upper end surface of the lower cylinder body casting, the first positioning convex strip on the upper end surface of the lower cylinder body casting is inserted into the second positioning groove on the lower end surface of the upper cylinder body casting, the upper cylinder body casting is locked on the upper end surface of the lower cylinder body casting through the fixing bolt, and the joint of the upper cylinder body casting and the lower cylinder body casting is sealed through the first elastic sealing strip and the second elastic sealing strip;
The air bag is inflated by the electric air pump, and the outer surface of the heat preservation quilt is compressed after the air bag is inflated, so that the inner wall surface of the heat preservation quilt compresses the outer surface of the upper cylinder casting. When the heat preservation quilt and the air bag need to be replaced, the heat preservation cover can be replaced only by opening, and the heat preservation quilt is convenient to assemble and disassemble, good in heat preservation effect, good in stability during operation, high in overhaul or maintenance efficiency and good in practicability.
The utility model is further described below with reference to the drawings and specific examples.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is an enlarged schematic view of section I of FIG. 1;
FIG. 3 is a schematic view of the structure of a cylinder casting according to an embodiment of the present utility model;
FIG. 4 is a schematic view of the structure of a cylinder casting according to an embodiment of the present utility model.
Detailed Description
In the description of the present embodiment, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like are presented, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.
Referring to fig. 1 to 4, the front cylinder casting of the steam turbine of the coal-fired power generating unit disclosed by the utility model comprises a cylinder casting, wherein the cylinder casting comprises a lower cylinder casting 1 and an upper cylinder casting 2, the lower cylinder casting 1 is of a rectangular structure, the upper cylinder casting 2 is of an arc structure, a first arc groove 11 with an upward opening is arranged in the middle of the upper end surface of the lower cylinder casting 1, a second arc groove 21 with a downward opening is arranged at the position of the lower end surface of the upper cylinder casting 2 aligned with the first arc groove, the lower cylinder casting 1 and the upper cylinder casting 2 are detachably connected, and the first arc groove 11 and the second arc groove 21 together form a cylinder cavity;
The upper end face of the lower cylinder casting 1 is provided with a first positioning groove 12 and a first positioning raised line 13 at the edge position of the first arc-shaped groove 11, and a first sealing groove 121 is arranged on the inner bottom surface of the first positioning groove 12;
The heat preservation quilt 3 is sleeved on the outer surface of the upper cylinder body casting 2, the heat preservation cover 4 is sleeved on the outer surface of the heat preservation quilt 3, an air bag 5 is arranged between the inner wall surface of the heat preservation cover 4 and the outer surface of the heat preservation quilt 3, the air bag 5 is of an arc-shaped structure, the left lower end of the air bag 5 is integrally provided with an air inlet pipe 51, an air inlet of the air inlet pipe 51 is fixedly provided with a one-way valve 6, an electric air pump 7 is arranged at the inlet of the one-way valve 6, the air bag 5 is inflated through the electric air pump 7, and the outer surface of the heat preservation quilt 3 is compressed after the air bag 5 is inflated, so that the inner wall surface of the heat preservation quilt 3 compresses the outer surface of the upper cylinder body casting 2.
Preferably, the air bag 5 is made of high temperature resistant silica gel, and the vertical distance between the inner wall surface of the heat preservation cover 4 and the outer surface of the heat preservation quilt 3 is 1-15cm. Air inlet of one-way valve 6 toward the inside of the air bag.
In order to make the structural design of the present utility model more reasonable, as a preferred embodiment, the right lower end of the air bag 5 is provided with an exhaust pipe 52, and an air outlet of the exhaust pipe 52 is provided with a sealing screw cap 53.
The first elastic sealing strip 8 is arranged in the first sealing groove 121, the second elastic sealing strip 9 is arranged in the second sealing groove 231, a plurality of positioning convex blocks are integrally arranged at the lower end of the upper cylinder body casting 2, a fixing bolt is arranged on each positioning convex block, and the upper cylinder body casting 2 is locked on the upper end face of the lower cylinder body casting 1 through the fixing bolt. Preferably, the first elastic sealing strip 8 and the second elastic sealing strip 9 are made of high temperature resistant silica gel or high temperature resistant rubber.
The heat preservation cover 4 is made of stainless steel, and the lower end of the heat preservation cover 4 is fixedly connected with the upper end face of the lower cylinder body casting 1 through bolts. Preferably, the heat-insulating cover 4 has an arc structure.
The outer surface of the air bag 5 is connected with the heat preservation cover 4 through a magic tape, an air pressure sensor is arranged in the air bag 5, and the air pressure sensor is connected with the electric air pump 7 through a wire. The air in the air bag 5 can be inflated according to the air pressure change, so that the air pressure is ensured to be stable.
The bottom of the lower cylinder body casting 1 is provided with a plurality of height adjusting devices 10, each height adjusting device 10 comprises a screw, a bottom plate and a rubber shock pad, the bottom of the lower cylinder body casting 1 is provided with a plurality of adjusting screw holes 14 with downward openings, the lower port of each adjusting screw hole 14 is provided with a bottom plate embedded groove, the upper end of the screw is in threaded connection with the aligned adjusting screw holes, the lower end of the screw is integrally arranged with the bottom plate, and the lower end face of the bottom plate is fixedly bonded with the upper end face of the rubber shock pad. As the preference, the quantity of height-adjusting device 10 sets up more than 4, and height-adjusting device 10 is the rectangle form and distributes, and under the normal condition, the lower terminal surface of the rubber shock pad of every height-adjusting device 10 and the bottom surface parallel and level of lower cylinder body foundry goods 1, when the ground of the department of installing of lower cylinder body foundry goods 1 is uneven, through rotatory screw rod, the bottom plate and the rubber shock pad that the screw rod drive was aimed at stretch out downwards for lower cylinder body foundry goods 1 location is reliable, difficult not hard up, job stabilization.
When the upper cylinder casting 2 is mounted on the upper end face of the lower cylinder casting 1 in practical application, the first positioning convex strip 22 on the lower end face of the upper cylinder casting 2 is inserted into the first positioning groove 12 on the upper end face of the lower cylinder casting 1, the first positioning convex strip 13 on the upper end face of the lower cylinder casting 1 is inserted into the second positioning groove 23 on the lower end face of the upper cylinder casting 2, the upper cylinder casting 2 is locked on the upper end face of the lower cylinder casting 1 through a fixing bolt, and the joint of the upper cylinder casting 2 and the lower cylinder casting 1 is sealed through the first elastic sealing strip 8 and the second elastic sealing strip 9;
The air bag 5 is inflated through the electric air pump 7, and the air bag 5 is inflated to press the outer surface of the heat preservation quilt 3, so that the inner wall surface of the heat preservation quilt 3 is pressed on the outer surface of the upper cylinder casting 2. When the heat preservation quilt 3 and the air bag 5 need to be replaced, the heat preservation cover 4 is only required to be opened for replacement.
The utility model has reasonable structural design, convenient assembly and disassembly operation, good heat preservation effect, good stability during operation, high overhaul or maintenance efficiency and good practicability.
The foregoing embodiments are provided for further explanation of the present utility model and are not to be construed as limiting the scope of the present utility model, and some insubstantial modifications and variations of the present utility model, which are within the scope of the utility model, will be suggested to those skilled in the art in light of the foregoing teachings.
Claims (6)
1. The front cylinder casting of the turbine of the coal-fired generator set comprises a cylinder casting and is characterized in that the cylinder casting comprises a lower cylinder casting (1) and an upper cylinder casting (2), the lower cylinder casting (1) is of a rectangular structure, the upper cylinder casting (2) is of an arc structure, a first arc-shaped groove (11) with an upward opening is arranged in the middle of the upper end face of the lower cylinder casting (1), a second arc-shaped groove (21) with a downward opening is arranged at the position, aligned with the first arc-shaped groove, of the lower end face of the upper cylinder casting (2), the lower cylinder casting (1) and the upper cylinder casting (2) are detachably connected, and the first arc-shaped groove (11) and the second arc-shaped groove (21) form a cylinder cavity together;
the upper end face of the lower cylinder body casting (1) is positioned at the edge of the first arc-shaped groove (11) and is provided with a first positioning groove (12) and a first positioning raised line (13), a first sealing groove (121) is formed in the inner bottom surface of the first positioning groove (12), a second positioning raised line (22) is integrally formed in the position, aligned with the first positioning groove (12), of the lower end face of the upper cylinder body casting (2), a second positioning groove (23) is formed in the position, aligned with the first positioning raised line (13), of the lower end face of the upper cylinder body casting (2), and a second sealing groove (231) is formed in the second positioning groove (23);
The utility model discloses a cylinder body foundry goods, including cylinder body foundry goods, upper cylinder body foundry goods, cover is equipped with heat preservation quilt (3) on the surface of upper cylinder body foundry goods (2), the cover is equipped with heat preservation cover (4) on the surface of heat preservation quilt (3), be provided with gasbag (5) between the surface of heat preservation cover (4) to heat preservation quilt (3), gasbag (5) are the arc structure, and the integrative intake pipe (51) that are provided with in left lower extreme of gasbag (5), the fixed check valve (6) that are provided with of air inlet of intake pipe (51), the import of check valve (6) is provided with electric air pump (7), inflates for gasbag (5) through electric air pump (7), the surface of heat preservation quilt (3) is compressed tightly after the gasbag (5) are inflated to make the internal face of heat preservation quilt (3) compress tightly the surface of upper cylinder body foundry goods (2).
2. The front cylinder casting of the steam turbine of the coal-fired power generation unit according to claim 1, wherein an exhaust pipe (52) is arranged at the right lower end of the air bag (5), and a sealing screw cover (53) is arranged at an air outlet of the exhaust pipe (52).
3. The front cylinder casting of the steam turbine of the coal-fired power unit, as set forth in claim 2, is characterized in that a first elastic sealing strip (8) is arranged in the first sealing groove (121), a second elastic sealing strip (9) is arranged in the second sealing groove (231), a plurality of positioning convex blocks are integrally arranged at the lower end of the upper cylinder casting (2), a fixing bolt is arranged on each positioning convex block, and the upper cylinder casting (2) is locked on the upper end face of the lower cylinder casting (1) through the fixing bolt.
4. The front cylinder casting of the steam turbine of the coal-fired power generator unit according to claim 3, wherein the heat preservation cover (4) is made of stainless steel, and the lower end of the heat preservation cover (4) is fixedly connected with the upper end face of the lower cylinder casting (1) through bolts.
5. The front cylinder casting of the steam turbine of the coal-fired power generating unit according to claim 1 or 4 is characterized in that the outer surface of the air bag (5) is connected with the heat preservation cover (4) through a magic tape, an air pressure sensor is arranged in the air bag (5), and the air pressure sensor is connected with the electric air pump (7) through a wire.
6. The front cylinder casting of the steam turbine of the coal-fired power generating unit, as set forth in claim 1, is characterized in that a plurality of height adjusting devices (10) are arranged at the bottom of the lower cylinder casting (1), each height adjusting device (10) comprises a screw rod, a bottom plate and a rubber shock pad, a plurality of adjusting screw holes with downward openings are arranged at the bottom of the lower cylinder casting, a bottom plate embedded groove is formed in the lower port of each adjusting screw hole, the upper end of the screw rod is in threaded connection with the aligned adjusting screw holes, the lower end of the screw rod is integrally arranged with the bottom plate, and the lower end face of the bottom plate is fixedly bonded with the upper end face of the rubber shock pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420575111.4U CN222141341U (en) | 2024-03-25 | 2024-03-25 | Coal-fired generator steam turbine front cylinder casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420575111.4U CN222141341U (en) | 2024-03-25 | 2024-03-25 | Coal-fired generator steam turbine front cylinder casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222141341U true CN222141341U (en) | 2024-12-10 |
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ID=93735845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420575111.4U Active CN222141341U (en) | 2024-03-25 | 2024-03-25 | Coal-fired generator steam turbine front cylinder casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222141341U (en) |
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2024
- 2024-03-25 CN CN202420575111.4U patent/CN222141341U/en active Active
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