A high-temperature expansion joint structure for exhaust

Abstract

This utility model relates to the field of expansion joint technology, specifically disclosing a high-temperature exhaust expansion joint structure, including a steel structure frame detachably connected to the top of the exhaust system pipeline. The top of the steel structure frame is formed with an air inlet, and support frames are fixedly connected to the top of the steel structure frame on both sides of the air inlet. A skin is detachably connected between the two support frames. Several anchor rods are vertically arranged inside the steel structure frame, and several fastening joints for positioning the anchor rods are provided at the bottom of the steel structure frame. The steel structure frame is filled with a heat insulation and sound absorption layer, which solves the problem that traditional exhaust expansion joints use external insulation wrapping, which is inconvenient for on-site installation.

Description

Technical Field

[0001] This application relates to the field of expansion joint technology, and specifically discloses a high-temperature exhaust expansion joint structure. Background Technology

[0002] Gas turbines generate a large amount of heat during operation, causing the exhaust system pipes and related components to expand due to heat. Exhaust expansion joints can absorb the displacement caused by this thermal expansion through their own elastic deformation, such as axial, lateral, and angular displacements, thereby preventing the pipes from deforming, cracking, or even being damaged due to thermal stress and ensuring the safe operation of the pipeline system.

[0003] Meanwhile, gas turbines generate vibration and noise during operation. Flexible elements in the exhaust expansion joint, such as bellows, can effectively absorb and isolate some of the vibration energy, reduce the propagation of vibration in the pipeline system, thereby reducing noise levels and improving the operating conditions of the surrounding environment and equipment.

[0004] Traditional exhaust expansion joints use a metal casing with external insulation. This method requires a large installation space and has insufficient adjustment range. In addition, the overall metal casing poses a risk of thermal bridging. If external insulation is used, the entire metal expansion joint, including the flange connection surface, must be wrapped, which greatly hinders the overall consistency of the system and the convenience of on-site installation.

[0005] This invention provides a high-temperature expansion joint structure for exhaust gas to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of this invention is to solve the problem that traditional exhaust expansion joints, which use external insulation wrapping, are inconvenient for on-site installation.

[0007] To achieve the above objectives, the basic solution of this utility model provides an exhaust high-temperature expansion joint structure, including a steel structure frame that is detachably connected to the top of the exhaust system pipe, an air inlet formed on the top of the steel structure frame, support frames fixedly connected to the top of the steel structure frame on both sides of the air inlet, and a skin detachably connected between the two support frames.

[0008] Several anchor rods are vertically arranged inside the steel structure frame, and several fastening joints for positioning the anchor rods are provided at the bottom of the steel structure frame. The steel structure frame is filled with a heat insulation and sound absorption layer.

[0009] Furthermore, the skin is a double-wave skin.

[0010] Furthermore, the thermal insulation and sound absorption layer comprises several layers of thermal insulation and sound absorption materials vertically layered and filled within the steel structure frame.

[0011] Furthermore, the thermal insulation and sound absorption material is one of inorganic fiber spray coating, foamed rubber, and polyester fiber cotton.

[0012] Furthermore, it also includes a non-metallic high-temperature resistant layer laid at the bottom of the steel structure frame to isolate the thermal insulation absorption layer from the exhaust system duct.

[0013] Furthermore, the non-metallic high-temperature resistant layer is one of the following: a polytetrafluoroethylene layer, a glass fiber cloth layer, or a polymer composite material layer.

[0014] Furthermore, the fastening joint includes a bottom gasket located on the bottom surface of the steel structure frame, a top gasket located on the top surface of the bottom of the steel structure frame, and a bottom nut and a top nut respectively screwed into the anchor rod and abutting against the bottom gasket and the top gasket respectively.

[0015] Furthermore, it also includes a guide plate located at the bottom of the steel structure frame and extending into the exhaust system duct. The guide plate includes a support portion clamped between the bottom gasket and the bottom surface of the steel structure frame, a guide portion extending into the exhaust system duct for stabilizing airflow, and a connecting portion fixed between the support portion and the guide portion.

[0016] The principle and effect of this solution are as follows:

[0017] 1. Compared with existing technologies, this utility model provides heat insulation, sound insulation, and vibration reduction through a thermal insulation and sound absorption layer. Simultaneously, it moves the thermal insulation and sound absorption layer inside the steel structure frame, avoiding the need for secondary installation on-site. The installed non-metallic high-temperature resistant layer prevents the thermal insulation and sound absorption material filled in the internal thermal insulation and sound absorption layer from overflowing, and also avoids tearing caused by dynamic adjustments during installation and use. This solves the problem of traditional exhaust expansion joints using external insulation wrapping, which is inconvenient for on-site installation.

[0018] 2. Compared with the prior art, the present invention is provided with a double-wave skin, and the installed double-wave skin has a higher axial adjustment range.

[0019] 3. Compared with the prior art, the guide plate installed in this utility model can not only ensure the stability of the airflow in the exhaust system pipeline, but also allow the anchor rod to have a greater adjustment range in the circumferential radial direction through the support and the step difference of the guide plate. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1A schematic diagram of an exhaust high-temperature expansion joint structure proposed in an embodiment of this application is shown. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0023] The reference numerals in the accompanying drawings of the instruction manual include: 1. Steel structure frame; 2. Anchor bolt 1; 3. Non-metallic high-temperature resistant layer; 4. Top nut 1; 5. Guide plate; 6. Thermal insulation and sound absorption layer; 7. Support frame; 8. Double-wave skin; 9. Anchor bolt 2.

[0024] An exhaust high-temperature expansion joint structure, implementing, for example Figure 1 As shown:

[0025] This includes a steel frame 1 that is bolted to the top of the exhaust system duct.

[0026] The top of the steel structure frame 1 has an air inlet set along the direction of the exhaust system pipeline. On the top of the steel structure frame 1 on both sides of the air inlet, there is a support frame 7. The top of the two support frames 7 are respectively formed with display stands on opposite sides.

[0027] A skin is installed between the two support frames 7, specifically between the display stands of the two support frames 7. In this embodiment, the installed skin is a double-wave skin 8, and the two sides of the double-wave skin 8 are respectively installed on the display stand by anchor rods 2 9, specifically clamped between the nuts 2 screwed into the anchor rods 2 9 and the top surface of the display stand. The bottom of the anchor rods 2 9 penetrates through the top of the steel structure frame 1, and nuts 2 are screwed into the top and bottom surfaces of the top of the steel structure frame 1 for tightening.

[0028] In this embodiment, a plurality of anchor rods 2 are vertically arranged inside the steel frame 1. The top of each anchor rod 2 is screwed into a nut and abuts against the top and bottom surface of the steel frame 1. The bottom of the steel frame 1 is provided with a plurality of fastening joints for positioning the anchor rods 2 respectively. The fastening joints include a bottom washer installed on the bottom surface of the bottom of the steel frame 1, a top washer installed on the top surface of the bottom of the steel frame 1, and a bottom nut 1 and a top nut 4 respectively screwed into the anchor rod 2 and abutting against the bottom washer and the top washer respectively.

[0029] like Figure 1 As shown, a thermal insulation and sound-absorbing layer 6 is also filled inside the steel frame 1. In this embodiment, the thermal insulation and sound-absorbing layer 6 is filled with three layers of thermal insulation and sound-absorbing material in a vertical layer, and all three layers of thermal insulation and sound-absorbing material are foamed rubber. In other embodiments, the filled thermal insulation and sound-absorbing material can be one of inorganic fiber spray coating, foamed rubber, or polyester fiber cotton.

[0030] A non-metallic high-temperature resistant layer 3 is also laid at the bottom of the steel frame 1 to isolate the thermal insulation layer from the exhaust system pipes. In this embodiment, the non-metallic high-temperature resistant layer 3 is a polytetrafluoroethylene (PTFE) layer. In other embodiments, the non-metallic high-temperature resistant layer 3 can be one of a PTFE layer, a fiberglass cloth layer, or a polymer composite layer.

[0031] Furthermore, such as Figure 1 As shown, a guide plate 5 extending into the exhaust system duct is also installed at the bottom of the steel frame 1. The guide plate 5 includes a support portion clamped between the bottom gasket and the bottom surface of the steel frame 1, a guide portion extending into the exhaust system duct for stabilizing airflow, and a connecting portion fixed between the support portion and the guide portion.

[0032] In use, this utility model utilizes the thermal insulation and sound absorption layer 6 for heat insulation, sound insulation, and vibration damping. Simultaneously, the thermal insulation and sound absorption layer 6 is moved inside the steel structure frame 1, avoiding the need for secondary installation on-site. The installed non-metallic high-temperature resistant layer 3 prevents the thermal insulation and sound absorption material filled in the internal thermal insulation and sound absorption layer 6 from overflowing, and also avoids tearing caused by dynamic adjustments during installation and use.

[0033] Furthermore, this utility model adopts a double-wave skin 8, and the installed double-wave skin 8 has a higher axial adjustment range.

[0034] Furthermore, the guide plate 5 installed in this utility model can not only ensure the stability of the airflow in the exhaust system pipe, but also allow the anchor rod 2 to have a greater range of adjustment in the circumferential radial direction through the support part and the step difference of the guide plate 5.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-temperature expansion joint structure for exhaust gas, characterized in that, It includes a steel structure frame that can be detachably connected to the top of the exhaust system duct. The top of the steel structure frame is formed with an air inlet. Support frames are fixed to the top of the steel structure frame on both sides of the air inlet. A skin is detachably connected between the two support frames. Several anchor rods are vertically arranged inside the steel structure frame, and several fastening joints for positioning the anchor rods are provided at the bottom of the steel structure frame. The steel structure frame is filled with a heat insulation and sound absorption layer.

2. The exhaust high-temperature expansion joint structure according to claim 1, characterized in that, The skin is a double-wave skin.

3. The exhaust high-temperature expansion joint structure according to claim 1, characterized in that, The thermal insulation and sound absorption layer comprises several vertically layered thermal insulation and sound absorption materials filled within the steel structure frame.

4. The exhaust high-temperature expansion joint structure according to claim 3, characterized in that, The thermal insulation and sound absorption material is one of inorganic fiber spray coating, foamed rubber, or polyester fiber cotton.

5. The exhaust high-temperature expansion joint structure according to claim 1, characterized in that, It also includes a non-metallic high-temperature resistant layer laid at the bottom of the steel structure frame to isolate the thermal insulation absorption layer from the exhaust system pipes.

6. The exhaust high-temperature expansion joint structure according to claim 5, characterized in that, The non-metallic high-temperature resistant layer is one of the following: polytetrafluoroethylene layer, glass fiber cloth layer, and polymer composite material layer.

7. The exhaust high-temperature expansion joint structure according to claim 1, characterized in that, The fastening joint includes a bottom gasket located on the bottom surface of the steel structure frame, a top gasket located on the top surface of the bottom of the steel structure frame, and a bottom nut and a top nut respectively screwed into the anchor rod and abutting against the bottom gasket and the top gasket respectively.

8. The exhaust high-temperature expansion joint structure according to claim 7, characterized in that, It also includes a guide plate located at the bottom of the steel structure frame and extending into the exhaust system duct. The guide plate includes a support portion clamped between the bottom gasket and the bottom surface of the steel structure frame, a guide portion extending into the exhaust system duct for stabilizing airflow, and a connecting portion fixed between the support portion and the guide portion.

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