Improved gas turbine nonmetal expansion joint heat insulation device

Abstract

The improved gas turbine nonmetal expansion joint heat insulation device comprises a first frame and a second frame, the first frame and the second frame are both connected with guard plates, the guard plates are annularly arranged, the two guard plates are arranged at intervals in the width direction of the guard plates, the first frame and the second frame are spaced to form a cavity, and a heat preservation layer is arranged in the cavity; a cushion layer is connected between the two protective plates and is arranged in an annular shape, an inner ring of the cushion layer is in an arc shape, the convex arc face of the inner ring of the cushion layer faces the heat preservation layer, and an outer ring of the cushion layer makes contact with the heat preservation layer. When the expansion joint is heated to expand, the first frame and the second frame are heated to expand, the first frame and the second frame are far away from each other, the two protection plates are far away from each other, and meanwhile the cushion layer is stretched and deformed, so that the gap between the two protection plates is reduced, and the heat preservation layer is prevented from being scoured and emptied as much as possible.

Description

Technical Field

[0001] The present application relates to the field of expansion joints, and in particular to an improved non-metallic expansion joint insulation device for a combustion engine. Background Art

[0002] Non-metallic expansion joints are used for transition between the gas turbine outlet and the waste heat boiler inlet of a gas turbine power plant.

[0003] Reference Figure 1 The thermal insulation device for over-temperature of non-metallic expansion joints of gas turbines in the prior art comprises a left frame and a right frame. A plurality of insulation nails and screws are uprightly arranged on the inner walls of the left frame and the right frame, and a plurality of arc bridges are fixed in the middle. Insulation cotton is filled between the left frame and the right frame. The left frame and the right frame are both connected with connecting plates, and the two connecting plates partially overlap, and the connecting plates are both positioned and connected with the screws.

[0004] With regard to the above-mentioned related technologies, the expansion joint is repeatedly expanded and stretched by heat. After long-term use, the lower connecting plate cannot withstand the extrusion pressure caused by the three-dimensional displacement and will soon be deformed. The final result is that the gap between them is increased. Moreover, due to the irregular deformation, the direction of the flue gas changes, and the thermal insulation cotton is easily washed away and hollowed out. Utility Model Content

[0005] In order to reduce the gaps between the guard plates and avoid the situation where the insulation layer is eroded and hollowed out as much as possible, the present application provides an improved non-metallic expansion joint insulation device for a gas turbine.

[0006] The improved non-metallic expansion joint insulation device for a gas turbine provided in this application adopts the following technical solution:

[0007] An improved non-metallic expansion joint insulation device for a fuel engine comprises a first frame and a second frame, wherein the first frame and the second frame are spaced apart along the length direction of the expansion joint, the first frame and the second frame are both connected with a guard plate, the guard plate is arranged in an annular shape, the width direction of the guard plate is consistent with the length direction of the expansion joint, the two guard plates are spaced apart along their width direction, a cavity is formed between the first frame and the second frame, an insulation layer is arranged in the cavity, a cushion layer is connected between the two guard plates, two ends of the cushion layer are respectively connected to one end of the two guard plates, the cushion layer is arranged in an annular shape, the inner circle of the cushion layer is arc-shaped, the convex arc surface of the inner circle of the cushion layer faces the insulation layer, and the outer circle of the cushion layer contacts the insulation layer.

[0008] By adopting the above technical solution, when the expansion joint expands due to heat, the first frame and the second frame expand due to heat, the first frame and the second frame move away from each other, and the two guard plates move away from each other. At the same time, the cushion layer stretches and deforms, thereby reducing the gap between the two guard plates and avoiding the insulation layer from being washed away or hollowed out as much as possible.

[0009] Optionally, an installation cover is connected between the two guard plates, the installation cover is arranged in a ring shape, and is arranged on the side of the cushion layer away from the thermal insulation layer, the two ends of the installation cover are respectively connected to the side of the two guard plates away from the thermal insulation layer, a spring is connected to the side of the cushion layer away from the thermal insulation layer, one end of the spring is connected to the cushion layer, and the other end of the spring is in contact with the inner wall of the installation cover.

[0010] By adopting the above technical scheme, when the cushion layer expands due to heat, the two guard plates move away from each other and make the cushion layer bulge to the side away from the thermal insulation layer. The spring is squeezed and deformed. When the temperature drops, the two guard plates move closer to each other and reset, the thermal insulation layer shrinks and resets, the spring restores its shape and pushes the cushion layer to reset, so as to avoid the situation where the cushion layer cannot be reset in time due to its elasticity being easily affected after long-term use. In addition, adding an installation cover can reduce the entry of fine ash into the thermal insulation layer.

[0011] Optionally, a support block is connected to the side of the guard plate away from the insulation layer, and the support block is arranged in a ring shape. The width direction of the support block is consistent with the width direction of the guard plate, and the support block is provided with a sliding groove, and the length direction of the sliding groove is consistent with the width direction of the guard plate. A guide rod is connected to the sliding groove, and the length direction of the guide rod is consistent with the width direction of the guard plate. The two ends of the mounting cover along the width direction of the guard plate are respectively embedded in two sliding grooves, and the mounting cover is slidably mounted on the guide rod, and the mounting cover is slidably connected to the sliding groove along the width direction of the guard plate.

[0012] By adopting the above technical solution, when the expansion joint expands due to heat, the two guard plates move away from each other, so that the mounting cover slides along the width direction of the guard plate and is connected in the sliding groove, thereby minimizing damage caused by the two ends of the mounting cover being stretched when the guard plate expands due to the fixed connection between the guard plate and the mounting cover.

[0013] Optionally, the mounting cover is provided with a guide hole for the guide rod to pass through, and a first expansion gap is provided between an inner wall of the guide hole and a peripheral side of the guide rod.

[0014] By adopting the above technical solution, a first expansion gap is added to reserve space for the expansion of the mounting cover and the guide rod.

[0015] Optionally, each guide rod is slidably sleeved with two sleeves, the central axis of the sleeves is colinear with the central axis of the guide rod, the two sleeves are spaced apart along the length direction of the guide rod, a gap is formed between the two sleeves, the mounting cover is disposed between the two sleeves, one end of the sleeve is connected to the mounting cover, the other end of the sleeve is pointed, and the end of the sleeve away from the mounting cover is in contact with the guide rod.

[0016] By adopting the above technical solution and adding a sleeve, fine ash can be avoided from entering the first expansion gap as much as possible, and the situation where fine ash blocks the first expansion gap can be reduced. When the mounting cover slides along the width direction of the guard plate and is connected to the sliding groove, the sleeve moves with the mounting cover, and one end of the sleeve scrapes off the fine ash adhering to the surface of the guide rod, thereby further reducing the fine ash entering the first expansion gap.

[0017] Optionally, a baffle is slidably connected in the sliding groove, the length direction of the baffle is consistent with the width direction of the guard plate, the baffle is slidably connected in the sliding groove along its length direction, the inner wall of the sliding groove away from the spring end is provided with a through hole for the baffle to pass through, one end of the baffle is connected to the outer wall of the mounting cover along its length direction, the other end of the baffle passes through and is slidably connected in the through hole along its length direction, and when the mounting cover is slidably connected in the sliding groove along the width direction of the guard plate, the baffle always covers the sliding groove.

[0018] By adopting the above technical solution, a baffle is added. When the mounting cover slides along the width direction of the guard plate, the baffle moves with the mounting cover, thereby avoiding fine ash from entering the sliding groove as much as possible, and further reducing the amount of fine ash entering the first expansion gap.

[0019] Optionally, a second expansion gap is provided between the inner wall of the through hole and the baffle, and filling cotton is provided in the second gap.

[0020] By adopting the above technical solution, a second expansion gap is added to reserve space for the expansion of the support block and the baffle.

[0021] Optionally, a mounting block is connected to one end of the baffle away from the mounting cover, and the mounting block is used to contact the support block.

[0022] By adopting the above technical solution and adding a mounting block, it is possible to avoid as much as possible that the baffle plate falls off from the through hole when the baffle plate is deformed by heat.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the expansion joint expands due to heat, the first frame and the second frame expand due to heat, the first frame and the second frame move away from each other, and the two guard plates move away from each other. At the same time, the cushion layer stretches and deforms, thereby reducing the gap between the two guard plates and avoiding the insulation layer from being washed away or hollowed out as much as possible;

[0025] 2. When heated and expanded, the two guard plates move away from each other, and the cushion layer bulges away from the insulation layer. The spring is squeezed and deformed. When the temperature drops, the two guard plates move closer to each other and reset, the insulation layer shrinks and resets, and the spring restores its shape and pushes the cushion layer to reset. This can avoid the cushion layer from being unable to reset in time due to its elasticity being easily affected after long-term use. In addition, the addition of an installation cover can reduce the entry of fine dust into the insulation layer.

[0026] 3. Add a sleeve to avoid fine ash from entering the first expansion gap as much as possible and reduce the situation where fine ash blocks the first expansion gap. When the mounting cover slides along the width direction of the guard plate and is connected to the sliding groove, the sleeve moves with the mounting cover, and one end of the sleeve scrapes off the fine ash adhering to the surface of the guide rod, thereby further reducing the fine ash entering the first expansion gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the prior art.

[0028] Figure 2 is a cross-sectional view of this embodiment.

[0029] Figure 3 This embodiment Figure 2 Enlarged view of part A.

[0030] Figure 4 This embodiment Figure 2 Magnified view of part B.

[0031] Explanation of the reference numerals: 1. left frame; 2. right frame; 3. arc bridge; 4. thermal insulation cotton; 5. connecting plate; 100. first frame; 110. arc bridge; 120. thermal insulation layer; 200. second frame; 300. guard plate; 310. support block; 311. sliding groove; 312. guide rod; 313. sleeve; 314. through hole; 315. second expansion gap; 316. filling cotton; 320. mounting cover; 321. slider; 322. guide hole; 323. baffle; 324. first expansion gap; 325. mounting block; 400. cushion layer; 420. spring. DETAILED DESCRIPTION

[0032] The following is combined with Figure 2-4 This application is described in further detail.

[0033] The present application embodiment discloses an improved non-metallic expansion joint insulation device for a combustion engine. Figure 2 An improved non-metallic expansion joint insulation device for a gas turbine includes a first frame 100 and a second frame 200. The first frame 100 and the second frame 200 are spaced apart along the length direction of the expansion joint, and a plurality of arc bridges 110 are provided between the first frame 100 and the second frame 200. The plurality of arc bridges 110 are sequentially distributed along the circumference of the expansion joint. The arc bridges 110 are respectively connected to the first frame 100 and the second frame 200 at both ends along the length direction of the expansion joint. The first frame 100 and the second frame 200 are both connected with a guard plate 300. The guard plate 300 is arranged in a circular ring. The circumference of the guard plate 300 is consistent with the circumference of the expansion joint. The width direction of the guard plate 300 is consistent with the length direction of the expansion joint. The two guard plates 300 are spaced apart along the width direction thereof.

[0034] Reference Figure 2 and Figure 3 , a cushion layer 400 is connected between the two guard plates 300, and the cushion layer 400 is arranged in a circular ring, and the circumference of the cushion layer 400 is consistent with the circumference of the guard plate 300, and the width direction of the cushion layer 400 is consistent with the length direction of the expansion joint, and the two ends of the cushion layer 400 along its width direction are respectively connected to the two guard plates 300. A cavity is formed between the first frame 100 and the second frame 200, and a thermal insulation layer 120 is arranged in the cavity, and the outer ring of the guard plate 300 is in contact with the thermal insulation layer 120. The cross section of the cushion layer 400 is arc-shaped, and the convex arc surface of the cushion layer 400 faces the thermal insulation layer 120, and the outer ring of the cushion layer 400 is in contact with the thermal insulation layer 120. One end of the cushion layer 400 along its width direction is connected to the side of the guard plate 300 close to the thermal insulation layer 120, and the cushion layer 400 is connected to the guard plate 300 through bolts and nuts, and the bolts pass through the cushion layer 400 and the guard plate 300 along the radial direction of the guard plate 300 and are threadedly connected with the nuts.

[0035] The cushion layer 400 is added to reserve space for the thermal expansion of the guard plate 300 and reduce the gap between the two guard plates 300, thereby preventing the thermal insulation layer 120 from being washed away or hollowed out.

[0036] Reference Figure 2 and Figure 3 The guard plates 300 are all connected with support blocks 310, which are connected to the inner ring of the guard plates 300. The support blocks 310 are arranged in an annular shape, and the circumference of the support blocks 310 is consistent with the circumference of the guard plates 300. A mounting cover 320 is arranged between the two guard plates 300. The mounting cover 320 is arranged in an annular shape, and the circumference of the mounting cover 320 is consistent with the circumference of the guard plates 300. The width direction of the mounting cover 320 is consistent with the width direction of the guard plates 300. The outer ring of the mounting cover 320 is opened, and the opening of the mounting cover 320 faces the cushion layer 400. The mounting cover 320 is arranged on the side of the cushion layer 400 away from the thermal insulation layer 120, and the two ends of the mounting cover 320 are respectively in contact with the inner rings of the two support blocks 310, and the two ends of the mounting cover 320 along its width direction are respectively slidably connected to the inner rings of the two support blocks 310. A spring 420 is connected to the side of the cushion layer 400 away from the insulation layer 120 . The length direction of the spring 420 is consistent with the radial direction of the guard plate 300 . One end of the spring 420 is connected to the cushion layer 400 , and the other end of the spring 420 contacts the inner wall of the mounting cover 320 .

[0037] Reference Figure 2 and Figure 3The support block 310 is provided with sliding grooves 311 along both radial sides thereof, and the length direction of the sliding grooves 311 is consistent with the width direction of the guard plate 300. The mounting cover 320 is connected with sliders 321 at both ends along the width direction thereof, and one slider 321 corresponds to one sliding groove 311. The slider 321 is embedded in the sliding groove 311, and the slider 321 is slidably connected to the sliding groove 311 along the width direction of the guard plate 300. The sliding groove 311 is connected with a guide rod 312, and the length direction of the guide rod 312 is consistent with the width direction of the guard plate 300. The slider 321 is provided with a guide hole 322, and the depth direction of the guide hole 322 is consistent with the width direction of the guard plate 300. One slider 321 is slidably sleeved on one guide rod 312, and one guide rod 312 passes through one guide hole 322 along its length direction. When the expansion joint expands due to heat, the mounting cover 320 and the guard plate 300 are displaced, and the slider 321 is slidably connected to the sliding groove 311 along the width direction of the guard plate 300, so as to minimize damage to the mounting cover 320 caused by thermal expansion and deformation.

[0038] Reference Figure 2 and Figure 3 The inner wall of the guide hole 322 and the peripheral side of the guide rod 312 are separated by a first expansion gap 324. The guide rods 312 are each slidably sleeved with two sleeves 313, the central axis of the sleeve 313 is collinear with the central axis of the guide rod 312, the two sleeves 313 are spaced apart along the length direction of the guide rod 312, the mounting cover 320 is disposed between the two sleeves 313, one end of the sleeve 313 along its length direction is connected to the mounting cover 320, the other end of the sleeve 313 is pointed, and the end of the sleeve 313 away from the mounting cover 320 is in contact with the peripheral side of the guide rod 312. The additional sleeve 313 can prevent fine dust from entering the first expansion gap 324 as much as possible.

[0039] Reference Figure 2 and Figure 3 A baffle 323 is connected to one side of the slider 321 along the length direction of the guide rod 312 , and the baffle 323 is located on the side of the slider 321 away from the spring 420 , and the length direction of the baffle 323 is consistent with the length direction of the guide rod 312 .

[0040] Reference Figure 2 and Figure 4, the baffle 323 is slidably connected in the sliding groove 311 along its length direction, and both sides of the baffle 323 along its width direction are in contact with the inner wall of the sliding groove 311. A through hole 314 is opened in the inner wall of the sliding groove 311 along its length direction and away from the spring 420. One end of the baffle 323 is connected to the slider 321 along its length direction, and the other end of the baffle 323 passes through and is slidably connected in the through hole 314 along its length direction. A second expansion gap 315 is provided between the inner wall of the through hole 314 and the baffle 323, and a filling cotton 316 is provided in the second gap. The filling cotton 316 is a ceramic fiber cotton with a temperature resistance of 1200°C. The end of the baffle 323 away from the mounting cover 320 is connected to the mounting block 325, and the mounting block 325 is used to contact the end of the support block 310 away from the spring 420. The addition of the baffle 323 can prevent fine ash from entering the sliding groove 311 as much as possible.

[0041] The implementation principle of an improved non-metallic expansion joint insulation device for a fuel engine in an embodiment of the present application is as follows: when the expansion joint expands due to heat, the first frame 100 and the second frame 200 move away from each other, driving the two guard plates 300 to move away from each other, the cushion layer 400 is stretched and deformed, and the cushion layer 400 squeezes the spring 420, the spring 420 is deformed, and while the two guard plates 300 move away from each other, the slider 321 slides along the width direction of the guard plate 300 and is connected to the sliding groove 311. When the temperature drops, the two guard plates 300 move closer to each other, and the spring 420 restores its shape to push the cushion layer 400 back to its original shape. The cushion layer 400 is added to reduce the gap between the two guard plates 300, and to prevent the insulation layer 120 from being washed away or hollowed out as much as possible.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An improved non-metallic expansion joint insulation device for a gas turbine, comprising a first frame (100) and a second frame (200), wherein the first frame (100) and the second frame (200) are spaced apart along the length direction of the expansion joint, the first frame (100) and the second frame (200) are both connected with a guard plate (300), the guard plate (300) is arranged in a ring shape, the width direction of the guard plate (300) is consistent with the length direction of the expansion joint, the two guard plates (300) are spaced apart along the width direction thereof, a cavity is formed between the first frame (100) and the second frame (200), and a heat-insulating layer (120) is arranged in the cavity, characterized in that: A cushion layer (400) is connected between the two guard plates (300), and two ends of the cushion layer (400) are respectively connected to one end of the two guard plates (300). The cushion layer (400) is arranged in an annular shape, and the inner circle of the cushion layer (400) is arc-shaped. The convex arc surface of the inner circle of the cushion layer (400) faces the thermal insulation layer (120), and the outer circle of the cushion layer (400) is in contact with the thermal insulation layer (120).

2. According to claim 1, an improved non-metallic expansion joint insulation device for a gas turbine is characterized in that: A mounting cover (320) is connected between the two guard plates (300); the mounting cover (320) is arranged in an annular shape and is arranged on a side of the cushion layer (400) away from the thermal insulation layer (120); two ends of the mounting cover (320) are respectively connected to a side of the two guard plates (300) away from the thermal insulation layer (120); a spring (420) is connected to a side of the cushion layer (400) away from the thermal insulation layer (120); one end of the spring (420) is connected to the cushion layer (400), and the other end of the spring (420) is in contact with an inner wall of the mounting cover (320).

3. The improved non-metallic expansion joint insulation device for a gas turbine according to claim 2 is characterized in that: A support block (310) is connected to the side of the guard plate (300) away from the thermal insulation layer (120). The support block (310) is arranged in an annular shape. The width direction of the support block (310) is consistent with the width direction of the guard plate (300). The support block (310) is provided with a sliding groove (311). The length direction of the sliding groove (311) is consistent with the width direction of the guard plate (300). A guide rod (312) is connected in the sliding groove (311). The length direction of the guide rod (312) is consistent with the width direction of the guard plate (300). The mounting cover (320) is respectively embedded in the two sliding grooves (311) at both ends along the width direction of the guard plate (300). The mounting cover (320) is slidably sleeved on the guide rod (312). The mounting cover (320) is slidably connected to the sliding groove (311) along the width direction of the guard plate (300).

4. The improved non-metallic expansion joint insulation device for a gas turbine according to claim 3 is characterized in that: The mounting cover (320) is provided with a guide hole (322) for the guide rod (312) to pass through, and a first expansion gap (324) is provided between the inner wall of the guide hole (322) and the peripheral side of the guide rod (312).

5. The improved non-metallic expansion joint insulation device for a gas turbine according to claim 4 is characterized in that: The guide rods (312) are each slidably sleeved with two sleeves (313), the central axis of the sleeves (313) being colinear with the central axis of the guide rod (312), the two sleeves (313) being spaced apart along the length direction of the guide rod (312), the two sleeves (313) being spaced apart to form a gap, the mounting cover (320) being disposed between the two sleeves (313), one end of the sleeve (313) being connected to the mounting cover (320), the other end of the sleeve (313) being pointed, and the end of the sleeve (313) away from the mounting cover (320) being in contact with the guide rod (312).

6. The improved non-metallic expansion joint insulation device for a gas turbine according to claim 5 is characterized in that: A baffle (323) is slidably connected in each of the sliding grooves (311). The length direction of the baffle (323) is consistent with the width direction of the guard plate (300). The baffle (323) is slidably connected in the sliding groove (311) along its length direction. An inner wall of the sliding groove (311) at one end away from the spring (420) is provided with a through hole (314) for the baffle (323) to pass through. One end of the baffle (323) is connected to the outer wall of the mounting cover (320) along its length direction. The other end of the baffle (323) passes through and is slidably connected in the through hole (314) along its length direction. When the mounting cover (320) is slidably connected in the sliding groove (311) along the width direction of the guard plate (300), the baffle (323) always covers the sliding groove (311).

7. The improved non-metallic expansion joint insulation device for a gas turbine according to claim 6 is characterized in that: A second expansion gap (315) is provided between the inner wall of the through hole (314) and the baffle (323), and a filling cotton (316) is provided in the second expansion gap (315).

8. The improved non-metallic expansion joint insulation device for a gas turbine according to claim 6 is characterized in that: One end of the baffle (323) away from the mounting cover (320) is connected to a mounting block (325), and the mounting block (325) is used to contact the support block (310).

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