External thermal insulation exhaust section suitable for marine environment

Abstract

The utility model relates to the technical field of gas turbine exhaust, in particular to an external thermal insulation exhaust section suitable for a marine environment. The utility model discloses an external thermal insulation exhaust section suitable for a marine environment. A long-edge protection plate, a short-edge protection plate and a thermal insulation layer are mounted around an outer ring of an inner channel assembly; a channel plate is used as an airflow channel, an upper adapter flange is welded to the upper end of the channel plate, and a lower flange is welded to the lower end of the channel plate. A straight-edge baffle plate and a fillet baffle plate are welded on the side, close to the lower flange, of the channel plate; a fixed screw rod is welded on the outer ring of the channel plate; a horizontal sliding seat is welded to the lower end of the upper adapter flange, and vertical sliding seats are welded to the lower ends of the straight-edge baffle and the fillet baffle; the internal heat-preservation device can be used as a switching channel, a downstream exhaust channel is changed into a conventional internal heat-preservation channel, and the design difficulty and the manufacturing cost of the downstream exhaust channel are reduced. The steel protection plate is arranged outside the heat insulation layer, so that strong wind and rainstorm in the extreme ocean environment can be resisted.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust technology field of gas turbine, in particular to an external thermal insulation exhaust section suitable for marine environment. BACKGROUND

[0002] In order to reduce the weight of gas turbine, the exhaust nozzle section of gas turbine is mostly made of single plate; this makes the exhaust nozzle section of gas turbine and its downstream exhaust passage use single plate structure, in order to resist high temperature, the single plate structure exhaust passage needs to be made of high-temperature stainless steel plate and needs to be sprayed with special high-temperature paint for corrosion protection, and the manufacturing cost of the exhaust passage is high.

[0003] In addition, in order to isolate the heat radiation of the high-temperature exhaust gas in the exhaust passage, a heat insulation sheath with a block structure needs to be additionally wrapped outside the exhaust passage, which increases the workload of on-site construction of the equipment.

[0004] More and more offshore oil and gas platforms use gas turbines as their power supply or power source, and the gas turbine unit and its auxiliary equipment need to face extreme weather such as strong typhoon and heavy rain; if the exhaust passage of the gas turbine still uses single plate structure, the external heat insulation sheath is mostly fixed by steel wire or hook, which is prone to fall off under strong marine wind.

[0005] Therefore, an external thermal insulation exhaust section suitable for marine environment is needed to solve the above problems. SUMMARY

[0006] The utility model discloses a kind of external thermal insulation exhaust sections suitable for marine environment;To solve the above technical problems, the utility model provides the following technical solutions: a kind of external thermal insulation exhaust section suitable for marine environment, including inner channel component, long side guard plate, short side guard plate, fixed bolt, fixed nut, inner baffle, pressing piece, protective fastener and heat insulation layer.

[0007] Preferably, the external thermal insulation exhaust section suitable for marine environment is made of 316 stainless steel plate, and is formed by welding, to ensure that the inner channel component does not be damaged in the high-temperature and high-speed exhaust gas flow of the gas turbine; the long side guard plate, the short side guard plate, the inner baffle, the pressing piece and the protective fastener are all made of 316 stainless steel plate, and are installed on the inner channel component in assembly form by the fixed bolt and the fixed nut.

[0008] Preferably, the inner channel assembly is composed of an upper adapter flange, a channel plate, a lower flange, a straight edge baffle, a round corner baffle, a fixed screw rod, a horizontal sliding seat and a vertical sliding seat; the upper end of the channel plate is welded with the upper adapter flange, and the lower end of the channel plate is welded with the lower flange; the end close to the lower flange of the channel plate is welded with the straight edge baffle and the round corner baffle, and the joint between the straight edge baffle and the round corner baffle is not welded; the channel plate is welded with the fixed screw rod; the lower end of the upper adapter flange is welded with a horizontal sliding seat, and the lower end of the straight edge baffle and the round corner baffle is welded with a vertical sliding seat.

[0009] Preferably, the horizontal sliding seat is composed of a horizontal connecting plate, a horizontal sliding groove plate, a horizontal sealing plate and a horizontal sliding nut, the horizontal connecting plate, the horizontal sliding groove plate and the horizontal sealing plate are surrounded to form a cavity and welded into one body, and the horizontal sliding nut is placed in the cavity and can slide in the horizontal direction.

[0010] Preferably, the vertical sliding seat is composed of a vertical connecting plate, a vertical sliding groove plate, a vertical sealing plate and a vertical sliding nut, the vertical connecting plate, the vertical sliding groove plate and the vertical sealing plate are surrounded to form a cavity and welded into one body, and the vertical sliding nut is placed in the cavity and can slide in the vertical direction.

[0011] Preferably, the long side baffle, the short side baffle and the inner channel assembly form a surrounding cavity, and the surrounding cavity is filled with the heat insulation layer, and the heat insulation layer is composed of tightly laid aluminum silicate fiber felt with a protective surface.

[0012] Preferably, the four corners of the channel plate adopt a round corner transition, which can reduce the structural thermal stress of the four corners of the channel and improve the service life.

[0013] Preferably, the round corner baffle is provided with an expansion joint at the four corners of the channel plate to avoid extrusion or collision of the structure in thermal expansion.

[0014] Preferably, the outer dimensions of the upper adapter flange are larger than those of the lower flange, the outer dimensions of the upper adapter flange are the same as the interface of the downstream exhaust channel, and the exhaust channel downstream of the upper adapter flange is changed from a single-plate external insulation structure to a conventional internal insulation structure, which reduces the design difficulty and manufacturing cost of the downstream exhaust channel.

[0015] Preferably, a long circular connecting hole is provided in the middle of the upper adapter flange for installing, positioning and controlling the expansion direction, and other connecting holes of the upper adapter flange adopt large circular connecting holes to avoid knocking and interference between the connecting bolts and the upper adapter flange in thermal expansion.

[0016] Preferably, the long side guard plate and the short side guard plate are made of stainless steel plate, are installed on the fixed screw rod, and are fixed by using the fixed nut, the inner blocking piece, the pressing piece and the protective buckle, the fixed nut is made of 316 material, and the inner blocking piece, the pressing piece and the protective buckle are made of stainless steel plate.

[0017] Preferably, the long side guard plate and the short side guard plate adopt a mutual lap joint form. Beneficial effects

[0018] The utility model can be used as a switching channel, changes the downstream exhaust channel into a conventional internal heat preservation channel, and reduces the design difficulty and manufacturing cost of the downstream exhaust channel.

[0019] The utility model has a heat preservation layer and no other on-site installation work.

[0020] 3. The utility model has a steel guard plate outside the heat insulation layer, and can withstand strong wind and heavy rain in the marine extreme environment. DETAILED DESCRIPTION

[0021] Figure 1 Is the shaft side view of the utility model.

[0022] Figure 2 Is the side view of the utility model.

[0023] Figure 3 Is Figure 2 The A view in.

[0024] Figure 4 Is Figure 2 The B-B section view in.

[0025] Figure 5 Is the shaft side view of the inner channel assembly.

[0026] Figure 6 Is the side view of the inner channel assembly.

[0027] Figure 7 Is Figure 6 The C-C section view in.

[0028] Figure 8 Is the upper switching flange of the utility model.

[0029] Figure 9 Is the shaft side view of the horizontal sliding seat.

[0030] Figure 10 Is the shaft side view of the vertical sliding seat. DETAILED DESCRIPTION

[0031] Embodiment 1: An external thermal insulation exhaust section suitable for marine environment, comprising: an inner channel assembly 1, a long side guard plate 2, a short side guard plate 3, a fixing bolt 4, a fixing nut 5, an inner baffle 6, a protective fastener 7 and a thermal insulation layer 8; the inner channel assembly 1 is the main body structure, the long side guard plate 2 and the short side guard plate 3 and the thermal insulation layer 8 are installed on the outer side of the inner channel assembly 1, the long side guard plate 2 and the short side guard plate 3 are installed with the fixing nut 5 and the inner baffle 6 on the inner and outer sides, the long side guard plate 2 and the short side guard plate 3 are installed with the protective fastener 7 on the outer side, the protective fastener 7 is installed on the inner channel assembly 1 through the fixing bolt 4, and the thermal insulation layer 8 is installed in the cavity surrounded by the inner channel assembly 1, the long side guard plate 2 and the short side guard plate 3; this embodiment has the beneficial effect of being able to withstand strong winds and heavy rains in extreme marine environments by providing a guard plate outside the thermal insulation layer.

[0032] Embodiment 2: The inner channel assembly 1 according to embodiment 1, comprising: an upper adapter flange 9, a channel plate 10, a lower flange 11, a straight edge baffle 12, a round corner baffle 13, a fixed screw rod 14, a horizontal sliding seat 15 and a vertical sliding seat 16; the channel plate 10 is used as an air flow channel, the upper end of the channel plate 10 is welded with the upper adapter flange 9, and the lower end of the channel plate 10 is welded with the lower flange 11; the outer side of the channel plate 1 is welded with the straight edge baffle 12 and the round corner baffle 13 near the side of the lower flange 11; the joint between the straight edge baffle 12 and the round corner baffle 13 is not welded; the outer side of the channel plate 10 is welded with the fixed screw rod 14; the lower end of the outer side of the upper adapter flange 9 is welded with the horizontal sliding seat 15, and the lower end of the outer side of the straight edge baffle 12 and the round corner baffle 13 is welded with the vertical sliding seat 16; this embodiment integrates the thermal insulation layer and the exhaust channel, achieving the beneficial effect of no other on-site installation work.

[0033] Embodiment 3: The horizontal sliding seat 15 according to embodiment 2, which is made of a hollow structure surrounded by a horizontal connecting plate 17, a horizontal sliding groove plate 18 and a horizontal sealing plate 19, and a horizontal sliding nut 20 is embedded in the hollow structure; this embodiment has the beneficial effect that the long side guard plate and the short side guard plate can slide in the horizontal direction.

[0034] Embodiment 4: The vertical sliding seat 16 according to embodiment 2, which is made of a hollow structure surrounded by a vertical connecting plate 21, a vertical sliding groove plate 22 and a vertical sealing plate 23, and a vertical sliding nut 24 is embedded in the hollow structure; this embodiment has the beneficial effect that the long side guard plate and the short side guard plate can slide in the vertical direction.

[0035] Example 5: The inner four corners of the passage plate 10 according to example 2 are rounded; this implementation realizes the beneficial effect of eliminating thermal stress of the four corners.

[0036] Example 6: The rounded baffle 13 according to example 2 is provided with expansion joints 27 at the four corners of the passage plate 10; this implementation realizes the beneficial effect of avoiding interference of the structure in thermal expansion.

[0037] Example 7: The upper adapter flange 9 according to example 2 is larger in size than the lower flange 11; this implementation realizes the beneficial effect of changing the downstream exhaust passage into a conventional inner insulation passage, reducing the design difficulty and manufacturing cost of the downstream exhaust passage.

[0038] Example 8: The upper adapter flange 9 according to example 2 is provided with an oblong connecting hole 25 in the middle, and a large circular connecting hole 26 is provided around the upper adapter flange 9; this implementation realizes the beneficial effect of controlling the direction of thermal expansion.

Claims

1. An externally insulated exhaust section suitable for use in a marine environment, characterised in that: The utility model provides a kind of inner passage assembly (1), long side guard plate (2), short side guard plate (3), fixed bolt (4), fixed nut (5), inner baffle (6), protective fastener (7) and heat insulation layer (8);With the inner passage assembly (1) as main body structure, the long side guard plate (2), the short side guard plate (3) and the heat insulation layer (8) are installed around the outer side circle of the inner passage assembly (1), the long side guard plate (2) and the short side guard plate (3) are both installed with the fixed nut (5) and the inner baffle (6) inside and outside, the long side guard plate (2) and the short side guard plate (3) are installed with the protective fastener (7) outside, the protective fastener (7) is installed on the inner passage assembly (1) by the fixed bolt (4), and the heat insulation layer (8) is installed in the cavity formed by the inner passage assembly (1), the long side guard plate (2) and the short side guard plate (3).

2. The external thermal insulation exhaust section for marine environment according to claim 1, characterized in that: The inner passage assembly (1) comprises: an upper adapter flange (9), a passage plate (10), a lower flange (11), a straight edge baffle (12), a round corner baffle (13), a fixed screw rod (14), a horizontal sliding seat (15), and a vertical sliding seat (16); the passage plate (10) is used as an air flow passage, the upper end of the passage plate (10) is welded with the upper adapter flange (9), and the lower end of the passage plate (10) is welded with the lower flange (11); the outer side circle of the passage plate (10) is welded with the straight edge baffle (12) and the round corner baffle (13) near one side of the lower flange (11); the straight edge baffle (12) and the round corner baffle (13) are not welded at the joint; the outer side circle of the passage plate (10) is welded with the fixed screw rod (14); the lower end circle of the upper adapter flange (9) is welded with the horizontal sliding seat (15), and the lower end circle of the straight edge baffle (12) and the round corner baffle (13) is welded with the vertical sliding seat (16).

3. An external thermal insulation exhaust section for marine environment according to claim 2, characterized in that: The horizontal sliding seat (15) is a hollow structure surrounded by a horizontal connecting plate (17), a horizontal sliding groove plate (18), and a horizontal sealing plate (19) and is welded to be made, and a horizontal sliding nut (20) is embedded in the hollow structure.

4. The external thermal insulation exhaust section for marine environment according to claim 2, characterized in that: The vertical sliding seat (16) is a hollow structure surrounded by a vertical connecting plate (21), a vertical sliding groove plate (22), and a vertical sealing plate (23) and is welded to be made, and a vertical sliding nut (24) is embedded in the hollow structure.

5. The external thermal insulation exhaust section for marine environment according to claim 2, characterized in that: The inside corners of the passage plate (10) adopt a round corner transition form.

6. The external thermal insulation exhaust section for marine environment according to claim 2, characterized in that: The round corner baffle (13) is provided with an expansion joint (27) at each corner of the passage plate (10).

7. The external thermal insulation exhaust section for marine environment according to claim 2, characterized in that: The outer dimensions of the upper adapter flange (9) are greater than those of the lower flange (11).

8. The external thermal insulation exhaust section for marine environment according to claim 2, characterized in that: A long circular connecting hole (25) is arranged in the middle of the upper adapter flange (9), and a large circular connecting hole (26) is arranged around the upper adapter flange (9).

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