A segmented detachable heat preservation device for a combustion engine fuel branch pipe

Abstract

The present application relates to the technical field of gas turbine, and discloses a sectional detachable heat preservation device for fuel branch pipe of gas turbine, which comprises a heat preservation block, a plurality of first magic tape rough surface patches are fixedly connected to the top of the heat preservation block, the first magic tape rough surface patches on both sides are staggered, first magic tape hook surface patches are fixedly connected to the top of the heat preservation block, the first magic tape hook surface patches on both sides of the heat preservation block are staggered, a first mounting block is arranged on one side of the heat preservation block, two fixed plates are fixedly connected to one side of the first mounting block, and a sliding groove is formed in one side of each of the two fixed plates, and the sliding grooves are oppositely arranged. The present application completely solves the problems of repeated peeling of the heat preservation layer, sealing failure and heat leakage caused by traditional rigid connection, avoids the wear of the matching surface caused by repeated disassembly and assembly, shortens the disassembly and assembly time, and solves the industry pain points of damage of the heat preservation structure, difficulty in repositioning and high labor cost of the gas turbine power plant caused by frequent maintenance.

Description

Technical Field

[0001] This invention relates to the field of gas turbine technology, specifically to a segmented, detachable insulation device for gas turbine fuel branch pipes. Background Technology

[0002] The fuel branch pipes of gas turbines must be insulated, primarily because they constitute an irreplaceable engineering barrier in four dimensions: thermodynamic control, safety protection, fuel performance maintenance, and equipment lifespan assurance. The operating temperature of the fuel branch pipes reaches as high as 450–600°C. Without insulation, the pipe walls continuously dissipate heat to the environment through radiation and convection, resulting in heat loss.

[0003] However, the existing gas turbine fuel branch pipe insulation devices have many problems: 1. Due to frequent disassembly and assembly during maintenance and routine upkeep, the gas turbine fuel branch pipe insulation in gas turbine power plants has been in operation for too long, resulting in uneven coverage of insulation cotton in some areas and poor insulation effect. 2. Existing insulation devices all use rigid or semi-rigid connections, without considering that the temperature difference of the gas turbine fuel branch pipe can reach more than 300°C during start-up and shutdown cycles. The significant difference in thermal expansion coefficients between the metal pipe wall and the insulation layer leads to repeated peeling of the insulation layer, sealing failure, and heat leakage.

[0004] Therefore, in order to improve the performance of the gas turbine fuel branch pipe insulation device and to promote technological progress in the industry and enhance core technological competitiveness, this application proposes a new implementation scheme that differs from the segmented detachable insulation device and application method for gas turbine fuel branch pipes in the prior art. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a segmented, detachable insulation device for gas turbine fuel branch pipes. The main purpose is to solve the problems of uneven insulation coverage, poor insulation performance, repeated peeling of the insulation layer, sealing failure, and heat leakage in existing gas turbine fuel branch pipe insulation devices.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A segmented, detachable insulation device for a gas turbine fuel branch pipe includes an insulation block. Multiple first Velcro hook-and-loop fasteners are fixedly connected to both sides of the top of the insulation block, with the first Velcro hook-and-loop fasteners on both sides being staggered. First Velcro hook-and-loop fasteners are also fixedly connected to both sides of the top of the insulation block, with the first Velcro hook-and-loop fasteners on both sides being staggered. A first mounting block is provided on one side of the insulation block, and two fixing plates are fixedly connected to one side of the first mounting block. Each fixing plate has a sliding groove on one side, and the grooves are opposite to each other. A sliding block is slidably connected between the two sliding grooves, and a memory alloy spring is fixedly connected between the sliding block and the first mounting block. A latch is fixedly connected to one side of the sliding block, and a slot is provided on the other side of the insulation block. A second mounting block is provided at the bottom of the slot. A C-shaped frame is fixedly connected to one side of the second mounting block, and a hook is rotatably connected to the inner wall of one side of the C-shaped frame. Torque springs are sleeved on the rotating shafts on both sides of the hook, with one side of the torsion spring engaging with the C-shaped frame and the other end engaging with the rotating shaft on the hook.

[0007] Furthermore, the insulation block includes an insulation layer, a reinforcing layer on top of the insulation layer, and a protective layer on top of the reinforcing layer. Specifically, the insulation layer is an aerogel felt, the reinforcing layer is a nylon webbing, and the protective layer is a double-sided aluminum foil fiberglass cloth.

[0008] Based on the aforementioned scheme, a fluororubber pad is adhered to one side of the insulation block.

[0009] As a further embodiment of the present invention, the inner wall of the slot is provided with a composite sealing ring.

[0010] Furthermore, both the first and second mounting blocks have reinforcing shafts inserted through them, and the reinforcing shafts are sewn together with the reinforcing layer.

[0011] Based on the aforementioned scheme, a nylon cloth sleeve is fitted on the outer side of the fixing plate, and an opening is provided at the top of the nylon cloth sleeve.

[0012] As a further embodiment of the present invention, a second hook and loop fastener is fixedly connected to one side of the insulation block, and a second hook and loop fastener is fixedly connected to the other side of the insulation block. The second hook and loop fastener and the second hook and loop fastener are located between a plurality of first hook and loop fasteners.

[0013] Furthermore, an insulation screw is inserted into the top of the insulation block, and a locking washer is fitted on the outer surface of the insulation screw. The locking washer is located at the top of the insulation block, and an open nut is threaded to the bottom end of the insulation screw.

[0014] Based on the aforementioned scheme, a connecting strap is fixedly connected to the top of the insulation block, and an elastic band is fixedly connected to one end of the connecting strap. The elastic band is a high-elasticity nylon webbing, and a third hook and loop fastener is fixedly connected to the other end of the elastic band. The third hook and loop fastener is bonded to the second hook and loop fastener.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a segmented, detachable insulation device for gas turbine fuel branch pipes, which has the following advantages: 1. This device innovatively uses shape memory alloy springs as the core compensation element for longitudinal connections: when the branch pipe temperature exceeds 120°C, the shape memory alloy transforms from martensitic phase to austenitic phase, generating axial restoring force. Through the sliding groove-clamping mechanism, it automatically tightens adjacent insulation blocks, compensating for the axial expansion of the pipe wall in real time. When the temperature drops, the elastic modulus decreases, allowing stress-free disassembly. Furthermore, the transverse connection is formed by staggered multi-level Velcro, combined with the thermal expansion sealing effect of fluororubber gaskets, completely solving the problems of repeated peeling of the insulation layer, sealing failure, and heat leakage caused by traditional rigid connections.

[0016] 2. This device adopts a segmented modular structure. Each insulation block can be repeatedly disassembled and assembled through a latch-hook mechanism and Velcro. In low-temperature conditions, operators can manually disassemble the connection without tools. The fit between the insulation screw and the open nut provides stable support during installation and retains the thread positioning reference on the surface of the branch pipe after disassembly, ensuring the positional accuracy during reassembly. This avoids wear on the mating surfaces caused by repeated disassembly and assembly, shortens the disassembly and assembly time, and solves the industry pain points of gas turbine power plants, such as insulation structure damage, difficulty in reassembly positioning, and high labor costs caused by frequent maintenance.

[0017] 3. This device uses an elastic buffer connection structure composed of a connecting belt, high-elasticity nylon webbing, and a third hook-and-loop fastener to replace the traditional rigid hook-and-loop fastener connection. Under conditions where the temperature difference during the start-stop cycle of the fuel branch pipe reaches more than 300°C, the elastic deformation of the elastic belt actively compensates for the relative displacement between the metal pipe wall and the insulation layer caused by the difference in thermal expansion coefficients. This effectively absorbs the expansion stress of the pipe wall, eliminates the gap between the insulation blocks, and prevents the insulation layer from failing to seal and leaking heat due to repeated peeling. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of a segmented detachable heat preservation device for gas turbine fuel branch pipes proposed in this invention; Figure 2 This is a cross-sectional view of Embodiment 1 of a segmented detachable insulation device for gas turbine fuel branch pipes proposed in this invention. Figure 3This is a schematic diagram of the first longitudinal section of an embodiment 1 of a segmented detachable insulation device for a gas turbine fuel branch pipe proposed in this invention. Figure 4 This is a second longitudinal sectional view of Embodiment 1 of the segmented detachable insulation device for gas turbine fuel branch pipes proposed in this invention. Figure 5 This is a schematic diagram of the first connection state structure of Embodiment 1 of the segmented detachable heat preservation device for gas turbine fuel branch pipe proposed in this invention; Figure 6 This is a schematic diagram of the second connection state structure of Embodiment 1 of the segmented detachable heat preservation device for gas turbine fuel branch pipe proposed in this invention; Figure 7 This is a schematic diagram of the installation state structure of Embodiment 1 of the segmented detachable heat preservation device for gas turbine fuel branch pipes proposed in this invention. Figure 8 This is a three-dimensional structural schematic diagram of Embodiment 2 of a segmented detachable heat preservation device for gas turbine fuel branch pipes proposed in this invention.

[0019] In the diagram: 1. Insulation block; 101. Insulation layer; 102. Reinforcing layer; 103. Protective layer; 2. First hook and loop fastener; 3. First hook and loop fastener; 4. Fluororubber pad; 5. First mounting block; 501. Fixing plate; 502. Slide groove; 503. Sliding block; 504. Memory alloy spring; 505. Tongue; 6. Second mounting block; 601. C-shaped bracket; 602. Hook; 603. Torsion spring; 7. Slot; 701. Composite sealing ring; 8. Reinforcing shaft; 9. Nylon cloth sleeve; 10. Opening; 11. Second hook and loop fastener; 12. Second hook and loop fastener; 13. Opening nut; 14. Insulation screw; 15. Locking washer; 16. Connecting strap; 17. Elastic band; 18. Third hook and loop fastener. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1 Reference Figures 1-7A segmented, detachable insulation device for a gas turbine fuel branch pipe includes an insulation block 1. The insulation block 1, which is designed using three-dimensional scanning measurement technology, covers all the heat-bearing parts of the gas turbine. The insulation block 1 includes an insulation layer 101, a reinforcing layer 102 on top of the insulation layer 101, and a protective layer 103 on top of the reinforcing layer 102. The insulation layer 101 is specifically an aerogel felt, the reinforcing layer 102 is specifically a nylon webbing, and the protective layer 103 is specifically a double-sided aluminum foil fiberglass cloth. Multiple first hook and loop fasteners 2 are sewn to the top two sides of the insulation block 1. The first hook and loop fasteners 2 on both sides are staggered. First hook and loop fasteners 3 are sewn to the top two sides of the insulation block 1. The first hook and loop fasteners 3 on both sides of the insulation block 1 are staggered. A fluororubber pad 4 is bonded to one side of the insulation block 1. The fluororubber pad 4 does expand when heated, but its heat resistance is excellent. A first mounting block 5 is provided on one side of the insulation block 1, and two fixing plates 501 are welded to one side of the first mounting block 5. Each fixing plate 501 has a sliding groove 502 on one side, and the sliding grooves 502 are arranged opposite to each other. A sliding block 503 is slidably connected between the two sliding grooves 502, and a memory alloy spring 504 is fixed between the sliding block 503 and the first mounting block 5 by bolts. The memory alloy spring 504 is a NiTi alloy, and the phase transformation temperature range of the memory alloy spring 504 is 120°C–150°C. 120°C usually corresponds to the martensite end temperature, that is, below this temperature, the material is completely in the martensite phase, i.e., in a deformable state. 150°C usually corresponds to the austenite end temperature, that is, above this temperature, the material is completely transformed into the austenite phase, i.e., recovers the memory state and has elasticity. A latch 505 is welded to one side of the sliding block 503. The other side of the insulation block 1 is provided with a slot 7, and the bottom of the slot 7 is provided with a second mounting block 6. A C-shaped frame 601 is welded to one side of the second mounting block 6, and a hook 602 is rotatably connected to the inner wall of one side of the C-shaped frame 601. Torque springs 603 are provided on the rotating shafts on both sides of the hook 602, and one side of the torsion spring 603 is engaged with the C-shaped frame 601. The other end of the torsion spring 603 is engaged with the rotating shaft on the hook 602. A composite sealing ring 701 is provided on the inner wall of the slot 7. A reinforcing shaft 8 is inserted through the interior of both the first mounting block 5 and the second mounting block 6, and the reinforcing shaft 8 is sewn to the reinforcing layer 102, thereby providing support for the first mounting block 5 and the second mounting block 6. The outer side of the fixing plate 501 is covered with a nylon cloth sleeve 9, and the top of the nylon cloth sleeve 9 is provided with an opening 10. The nylon cloth sleeve 9 can provide protection during the insertion process, and the opening 10 can facilitate the disengagement of the latch 505 and the hook 602 on the sliding block 503 when it is in the disassembly state. A second hook and loop fastener 11 is sewn to one side of the insulation block 1, and a second hook and loop fastener 12 is sewn to the other side of the insulation block 1. The second hook and loop fastener 11 and the second hook and loop fastener 12 are located between a plurality of first hook and loop fasteners 2. An insulation screw 14 is inserted into the top of the insulation block 1, and a locking washer 15 is fitted on the outer surface of the insulation screw 14. The locking washer 15 is located on the top of the insulation block 1. An open nut 13 is threaded to the bottom end of the insulation screw 14. The open nut 13 is welded to the surface of the branch pipe, which provides stable support and positioning support for the next installation after disassembly.

[0022] The working principle of this embodiment is as follows: When it is necessary to insulate the fuel branch pipe of the gas turbine, firstly, the insulation block 1 is covered according to the shape of the branch pipe. Then, the first Velcro patch 2 on one side of the insulation block 1 is bonded to the first Velcro hook patch 3 on the other side of the adjacent insulation block 1 to achieve the lateral connection of the insulation block 1, so that it wraps around the outside of the branch pipe. Then, the latch 505 on one side of the insulation block 1 is inserted into the slot 7 on the other side of the adjacent insulation block. Then, the latch 505 is inserted forward, and the latch 505 squeezes the hook 602 to deflect. It continues to be inserted forward, and the hook 602 is engaged by the latch 505 under the action of the torsion spring 603 to achieve the longitudinal connection of the insulation block 1. Then, when the second Velcro patch 11 and the second Velcro hook patch 12 are bonded together; When the branch pipe expands axially due to thermal deformation caused by temperature difference, and the operating temperature of the branch pipe is higher than 120°C, the shape memory alloy spring 504 transforms from the martensitic phase to the austenitic phase, generating an axial restoring force and a restoring stress of about 8–12 N / mm². The shape memory alloy spring 504 pulls the latch 505 along the slide groove 502 on the fixed plate 501 to achieve automatic compensation for pipe wall expansion and eliminate gaps. When the insulation block 1 needs to be disassembled, and the branch pipe working temperature is higher than 120°C, the memory alloy spring 504 is in the martensitic phase and has a low elastic modulus. The memory alloy spring 504 can be easily pulled outward, and the tongue 505 can be easily disengaged from the hook 602 by inserting it into the slot 7, thus achieving tool-free quick disassembly.

[0023] Example 2 Reference Figure 8 A segmented, detachable insulation device for a gas turbine fuel branch pipe, wherein the top of the insulation block 1 is sewn with a connecting strap 16, and one end of the connecting strap 16 is sewn with an elastic band 17, which is a high-elasticity nylon webbing, and the other end of the elastic band 17 is sewn with a third hook and loop fastener 18, which is bonded to a second hook and loop fastener 12.

[0024] The working principle of this embodiment is as follows: When in use, compared with the second hook and loop fastener 11 used in embodiment 1, the connecting strap 16, elastic band 17 and third hook and loop fastener 18 can provide buffering force when fixed, thereby helping to compensate for the expansion of the pipe wall, eliminate gaps, and ensure a stable connection between the insulation blocks 1.

[0025] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0026] In the description herein, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A segmented, detachable insulation device for a gas turbine fuel branch pipe, comprising insulation blocks, characterized in that, Multiple first Velcro hook-and-loop fasteners are fixedly connected to the top two sides of the insulation block, with the first Velcro hook-and-loop fasteners on both sides being staggered. First Velcro hook-and-loop fasteners are fixedly connected to the top two sides of the insulation block, with the first Velcro hook-and-loop fasteners on both sides being staggered. A first mounting block is provided on one side of the insulation block, and two fixing plates are fixedly connected to one side of the first mounting block. Each of the two fixing plates has a sliding groove on one side, and the sliding grooves are arranged opposite each other. A sliding block is slidably connected between the two sliding grooves, and a memory alloy spring is fixedly connected between the sliding block and the first mounting block. A latch is fixedly connected to one side of the sliding block, and a slot is provided on the other side of the insulation block. A second mounting block is provided at the bottom of the slot. A C-shaped frame is fixedly connected to one side of the second mounting block, and a hook is rotatably connected to the inner wall of one side of the C-shaped frame. Torque springs are sleeved on the rotating shafts on both sides of the hook, and one side of the torsion spring is engaged with the C-shaped frame, while the other end of the torsion spring is engaged with the rotating shaft on the hook.

2. The segmented, detachable insulation device for gas turbine fuel branch pipes according to claim 1, characterized in that, The insulation block includes an insulation layer, a reinforcing layer on top of the insulation layer, and a protective layer on top of the reinforcing layer. Specifically, the insulation layer is an aerogel felt, the reinforcing layer is a nylon webbing, and the protective layer is a double-sided aluminum foil fiberglass cloth.

3. The segmented, detachable insulation device for gas turbine fuel branch pipes according to claim 1, characterized in that, A fluororubber pad is adhered to one side of the insulation block.

4. The segmented, detachable insulation device for gas turbine fuel branch pipes according to claim 1, characterized in that, The inner wall of the slot is provided with a composite sealing ring.

5. A segmented, detachable insulation device for gas turbine fuel branch pipes according to claim 1, characterized in that, Both the first and second mounting blocks have reinforcing shafts inserted through them, and the reinforcing shafts are sewn to the reinforcing layer.

6. A segmented, detachable insulation device for gas turbine fuel branch pipes according to claim 1, characterized in that, The outer side of the fixing plate is covered with a nylon cloth sleeve, and the top of the nylon cloth sleeve has an opening.

7. A segmented, detachable insulation device for gas turbine fuel branch pipes according to claim 1, characterized in that, A second hook and loop fastener is fixedly connected to one side of the insulation block, and a second hook and loop fastener is fixedly connected to the other side of the insulation block. The second hook and loop fastener and the second hook and loop fastener are located between multiple first hook and loop fasteners.

8. A segmented, detachable insulation device for gas turbine fuel branch pipes according to claim 1, characterized in that, An insulation screw is inserted into the top of the insulation block, and a locking washer is fitted on the outer surface of the insulation screw. The locking washer is located at the top of the insulation block, and an open nut is threaded to the bottom end of the insulation screw.

9. A segmented, detachable insulation device for a gas turbine fuel branch pipe according to claim 1, characterized in that, The top of the insulation block is fixedly connected to a connecting strap, and one end of the connecting strap is fixedly connected to an elastic band, which is a high-elasticity nylon webbing. The other end of the elastic band is fixedly connected to a third hook and loop fastener, which is bonded to the second hook and loop fastener.

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