High-pressure outer cylinder steel casting of steam turbine of tower type solar thermal generator set

Abstract

The utility model discloses a high-pressure outer cylinder steel casting of a steam turbine of a tower type solar thermal generator set, which comprises a cylinder body casting, a left connecting flange is integrally arranged at the left end of the cylinder body casting, a right connecting flange is integrally arranged at the right end of the cylinder body casting, and a positioning support is integrally arranged at the lower end of the cylinder body casting. A bottom plate is integrally arranged at the lower end of the positioning bracket; a plurality of roller devices are arranged on the bottom surface of the bottom plate; a first copper plating layer is fixedly arranged on the inner wall surface of the cylinder body casting, and the thickness of the first copper plating layer is 1-30 microns; a chromium plating layer is fixedly arranged on the outer surface of the cylinder body casting, and the thickness of the chromium plating layer is 30-150 microns; a maintenance through hole is formed in the top of the cylinder body casting, a sealing cover plate is arranged in the maintenance through hole, a hard alloy layer is welded to the inner end of the sealing cover plate, a second copper plating layer is fixedly arranged on the inner wall face of the hard alloy layer, and the thickness of the second copper plating layer is 1-15 micrometers. According to the technical scheme, the structure design is reasonable, work is stable, leakage is not prone to occurring, maintenance and repair are easy, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of solar thermal power generation, in particular to a high-pressure outer cylinder steel casting of a steam turbine of a tower type solar thermal power generation unit. Background Art

[0002] In recent years, with global warming and increased pollutant emissions, renewable energy has been increasingly developed to replace traditional fossil energy, and energy-saving and emission-reduction power generation technologies have been favored by various countries. Solar energy is a renewable resource with no pollution and zero emissions, and its development and utilization has become an important part of today's social energy strategy. The main methods of solar power generation are solar photovoltaic power generation and solar thermal power generation. The principle of photovoltaic power generation is to use solar panels to directly convert solar radiation energy into electrical energy. The advantage is that the equipment is simple and the technology is mature, and it has been widely used in the commercial field. Solar thermal power generation technology uses heliostats to concentrate solar energy on the surface of the collector, and the working fluid absorbs heat energy to generate steam, which drives the steam turbine to generate electricity. The renewable energy power generation method of solar thermal power generation has become a hot spot for research and application in the field of clean energy in various countries.

[0003] At present, there are four types of solar thermal power generation technologies used in engineering, namely trough solar power generation system, linear Fresnel power generation system, tower solar power generation system and dish solar power generation system. According to the different focusing methods of the concentrator, it is divided into line focusing collection system and point focusing collection system. Among them, the first two power generation systems belong to line focusing collection system; the latter two power generation systems belong to point focusing collection system.

[0004] Steam turbines usually operate under conditions of high temperature, high pressure and high speed, and are a type of relatively sophisticated heavy machinery.

[0005] The cylinder is the outer shell of the steam turbine. Its function is to separate the flow part of the steam turbine from the atmosphere, forming a closed steam chamber to ensure that the steam completes the energy conversion process inside the steam turbine.

[0006] The high-pressure outer cylinder of the steam turbine has to bear a lot of weight, and at the same time, the high-pressure outer cylinder has to keep the steam turbine stable during operation, so the high-pressure outer cylinder plays a very important role. The high-pressure outer cylinder is large in size, and maintenance and repair are relatively difficult. The traditional high-pressure outer cylinder is not stable enough, and it is easy to leak after cracks appear. The maintenance of the high-pressure outer cylinder is very troublesome, and the strength of the high-pressure cylinder after maintenance will not be as good as before. For this reason, we improve the structure of the existing high-pressure outer cylinder. Utility Model Content

[0007] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting which has a reasonable structural design, stable operation, no leakage, easy maintenance and repair, and good practicality.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting steel part, comprising a cylinder casting, the left end of the cylinder casting is integrally provided with a left connecting flange, the right end of the cylinder casting is integrally provided with a right connecting flange, the lower end of the cylinder casting is integrally provided with a positioning bracket, the lower end of the positioning bracket is integrally provided with a bottom plate, and a plurality of roller devices are provided on the bottom surface of the bottom plate;

[0009] A first copper plating layer is fixedly provided on the inner wall surface of the cylinder casting, and the thickness of the first copper plating layer is 1-30 μm; a chrome plating layer is fixedly provided on the outer surface of the cylinder casting, and the thickness of the chrome plating layer is 30-150 μm;

[0010] A maintenance through hole is provided at the top of the cylinder casting, a sealing cover plate is provided in the maintenance through hole, a cemented carbide layer is welded to the inner end of the sealing cover plate, the inner wall surface of the cemented carbide layer is an arc surface, and a second copper plating layer is fixedly provided on the inner wall surface of the cemented carbide layer, and the thickness of the second copper plating layer is 1-15μm.

[0011] The utility model is further configured as follows: the inspection through hole is a stepped through hole, the structure and size of the sealing cover plate match the inspection through hole, and a plurality of sealing rings are arranged between the sealing cover plate and the inner wall surface of the inspection through hole, and the sealing cover plate and the inner wall surface of the inspection through hole are sealed by the sealing rings.

[0012] The utility model is further configured as follows: a plurality of first bolts are arranged between the sealing cover plate and the cylinder casting, the sealing cover plate and the cylinder casting are locked and fixed by the first bolts, and an anti-loosening positioning plate is arranged at the outer end of the sealing cover plate, a plurality of second bolts are arranged between the anti-loosening positioning plate and the outer surface of the cylinder casting, and the anti-loosening positioning plate is locked on the outer surface of the cylinder casting by the second bolts.

[0013] The utility model is further configured as follows: 4-8 roller devices are arranged on the bottom surface of the base plate, the roller devices are distributed in a rectangular shape, and each roller device includes a roller frame, and the roller frame is connected and fixed to the bottom surface of the base plate by bolts.

[0014] The utility model is further configured as follows: the roller devices are all universal wheels with brakes.

[0015] The utility model is further configured as follows: the sealing ring is a high temperature resistant rubber sealing ring or a metal elastic gasket.

[0016] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model has a reasonable structural design, the cylinder casting is made of stainless steel and is manufactured in an integrated manner, a first copper plating layer is fixedly arranged on the inner wall surface of the cylinder casting, the first copper plating layer can cover the cracks on the inner surface of the cylinder casting, is not easy to leak, and can improve the corrosion resistance of the inner surface of the cylinder casting; a chrome plating layer is fixedly arranged on the outer surface of the cylinder casting, which can significantly improve the hardness, wear resistance and corrosion resistance of the outer surface of the cylinder casting;

[0017] In addition, the top of the cylinder casting is provided with an inspection hole, which makes maintenance and repair easy and convenient to use;

[0018] The positioning bracket and bottom plate integrally arranged at the lower end of the cylinder casting both play a positioning role, so that the high-pressure outer cylinder of the steam turbine of the tower-type solar thermal power generation unit can work stably, and a plurality of roller devices are arranged on the bottom surface of the bottom plate, so that the high-pressure outer cylinder of the steam turbine of the tower-type solar thermal power generation unit can be easily moved. Each roller device is equipped with a brake, so the positioning is reliable and the practicability is good.

[0019] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2 for Figure 1 The enlarged schematic diagram of the middle part I;

[0022] Figure 3 It is a cross-sectional schematic diagram of a cylinder casting according to an embodiment of the utility model;

[0023] Figure 4 It is a cross-sectional schematic diagram of a sealing cover plate according to an embodiment of the utility model. DETAILED DESCRIPTION

[0024] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] See also Figures 1 to 4The utility model discloses a tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting steel part, comprising a cylinder casting 1, the left end of the cylinder casting 1 is integrally provided with a left connecting flange 11, the right end of the cylinder casting 1 is integrally provided with a right connecting flange 12, the lower end of the cylinder casting 1 is integrally provided with a positioning bracket 13, the lower end of the positioning bracket 13 is integrally provided with a bottom plate 14, and a plurality of roller devices 2 are arranged on the bottom surface of the bottom plate 14;

[0026] A first copper plating layer 3 is fixedly provided on the inner wall surface of the cylinder casting 1, and the thickness of the first copper plating layer 3 is 1-30 μm; a chrome plating layer 4 is fixedly provided on the outer surface of the cylinder casting 1, and the thickness of the chrome plating layer 4 is 30-150 μm;

[0027] A maintenance through hole 15 is provided at the top of the cylinder casting 1, and a sealing cover plate 6 is provided in the maintenance through hole 15. A cemented carbide layer 7 is welded to the inner end of the sealing cover plate 6. The inner wall surface of the cemented carbide layer 7 is an arc surface, and a second copper plating layer 8 is fixedly provided on the inner wall surface of the cemented carbide layer 7. The thickness of the second copper plating layer 8 is 1-15μm.

[0028] Preferably, the inner wall surface of the second copper-plated layer 8 is spliced ​​together with the first copper-plated layer 3 to form a circular cylinder inner cavity. The cylinder casting 1 and the sealing cover plate 6 are both made of stainless steel.

[0029] In order to make the structural design of the utility model more reasonable, it is preferred that the inspection hole 15 is a stepped through hole, the structure and size of the sealing cover plate 6 match the inspection through hole 15, and a plurality of sealing rings 9 are arranged between the sealing cover plate 6 and the inner wall surface of the inspection through hole 15, and the sealing cover plate 6 and the inner wall surface of the inspection through hole 15 are sealed by the sealing ring 9.

[0030] A plurality of first bolts are arranged between the sealing cover plate 6 and the cylinder casting 1, and the sealing cover plate 6 and the cylinder casting 1 are locked and fixed by the first bolts. An anti-loosening positioning plate 10 is arranged at the outer end of the sealing cover plate 6, and a plurality of second bolts are arranged between the anti-loosening positioning plate 10 and the outer surface of the cylinder casting 1, and the anti-loosening positioning plate 10 is locked on the outer surface of the cylinder casting 1 by the second bolts.

[0031] A total of 4-8 roller devices 2 are arranged on the bottom surface of the bottom plate 14, and the roller devices 2 are distributed in a rectangular shape, and each roller device 2 includes a roller frame, and the roller frame is connected and fixed to the bottom surface of the bottom plate 14 by bolts. Preferably, the roller devices 2 are all universal wheels with brakes.

[0032] The sealing ring 9 is a high temperature resistant rubber sealing ring or a metal elastic gasket.

[0033] In actual application, the cylinder casting is made of stainless steel and is manufactured in an integrated manner. A first copper plating layer is fixedly arranged on the inner wall surface of the cylinder casting. The first copper plating layer can cover the cracks on the inner surface of the cylinder casting, is not easy to leak, and can improve the corrosion resistance of the inner surface of the cylinder casting; a chrome plating layer is fixedly arranged on the outer surface of the cylinder casting, which can significantly improve the hardness, wear resistance and corrosion resistance of the outer surface of the cylinder casting;

[0034] In addition, the top of the cylinder casting is provided with an inspection hole, which makes maintenance and repair easy, the structure design is reasonable and easy to use;

[0035] The positioning bracket and bottom plate integrally arranged at the lower end of the cylinder casting both play a positioning role, so that the high-pressure outer cylinder of the steam turbine of the tower-type solar thermal power generation unit can work stably, and a plurality of roller devices are arranged on the bottom surface of the bottom plate, so that the high-pressure outer cylinder of the steam turbine of the tower-type solar thermal power generation unit can be easily moved. Each roller device is equipped with a brake, so the positioning is reliable and the practicability is good.

[0036] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. A tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting, comprising a cylinder casting (1), characterized in that: The left end of the cylinder casting (1) is integrally provided with a left connecting flange (11), the right end of the cylinder casting (1) is integrally provided with a right connecting flange (12), the lower end of the cylinder casting (1) is integrally provided with a positioning bracket (13), the lower end of the positioning bracket (13) is integrally provided with a bottom plate (14), and a plurality of roller devices (2) are provided on the bottom surface of the bottom plate (14); A first copper plating layer (3) is fixedly provided on the inner wall surface of the cylinder casting (1), and the thickness of the first copper plating layer (3) is 1-30 μm; a chrome plating layer (4) is fixedly provided on the outer surface of the cylinder casting (1), and the thickness of the chrome plating layer (4) is 30-150 μm; The top of the cylinder casting (1) is provided with an inspection through hole (15), a sealing cover plate (6) is provided in the inspection through hole (15), a hard alloy layer (7) is welded to the inner end of the sealing cover plate (6), the inner wall surface of the hard alloy layer (7) is an arc surface, and a second copper plating layer (8) is fixedly provided on the inner wall surface of the hard alloy layer (7), and the thickness of the second copper plating layer (8) is 1-15 μm.

2. A tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting according to claim 1, characterized in that: The inspection through hole (15) is a stepped through hole, the structure and size of the sealing cover plate (6) match the inspection through hole (15), and a plurality of sealing rings (9) are arranged between the sealing cover plate (6) and the inner wall surface of the inspection through hole (15), and a seal is formed between the sealing cover plate (6) and the inner wall surface of the inspection through hole (15) through the sealing rings (9).

3. A tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting according to claim 2, characterized in that: A plurality of first bolts are arranged between the sealing cover plate (6) and the cylinder casting (1), and the sealing cover plate (6) and the cylinder casting (1) are locked and fixed by the first bolts. An anti-loosening positioning plate (10) is arranged at the outer end of the sealing cover plate (6), and a plurality of second bolts are arranged between the anti-loosening positioning plate (10) and the outer surface of the cylinder casting (1), and the anti-loosening positioning plate (10) is locked on the outer surface of the cylinder casting (1) by the second bolts.

4. A tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting according to claim 3, characterized in that: A total of 4 to 8 roller devices (2) are arranged on the bottom surface of the bottom plate (14), the roller devices (2) are distributed in a rectangular shape, and each roller device (2) comprises a roller frame, and the roller frame is connected and fixed to the bottom surface of the bottom plate (14) by bolts.

5. A tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting according to claim 4, characterized in that: The roller devices (2) are all universal wheels with brakes.

6. A tower-type solar thermal power generation unit steam turbine high-pressure outer cylinder casting according to claim 4, characterized in that: The sealing ring (9) is a high temperature resistant rubber sealing ring or a metal elastic gasket.

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