A high-temperature and high-pressure gas flow transmission pipeline structure

Abstract

The application discloses a high-temperature and high-pressure airflow transmission pipeline structure, which is divided into three layers, the outermost layer is a water-cooled metal outer cylinder, the middle layer is a heat-insulating and pressure-equalizing layer, and the innermost layer is a pressure-equalizing inner cylinder; the inner side of the water-cooled metal outer cylinder is provided with a cooling water interlayer, the cooling water interlayer is provided with an interlayer water channel and a water channel partition plate, the end of the water-cooled metal outer cylinder is provided with a water-cooled flange, the water-cooled flange is provided with a radial water channel, and cooling water enters the interlayer water channel through the radial water channel; the end of the pressure-equalizing inner cylinder is provided with a male-female joint, the male-female joint is in a fence type structure, the fence type structure forms a pressure-equalizing hole in a plugged state, the pressure-equalizing hole is used for releasing pressure outside the pressure-equalizing inner cylinder, so that the pressure inside and outside the pressure-equalizing inner cylinder is balanced, and the heat-insulating and pressure-equalizing layer is filled with inorganic nonmetal thermal insulation materials. The application can realize safe transmission of high-temperature and high-pressure airflow, reduce the loss of temperature and pressure, and reduce the requirement for pipeline materials and wall thickness.

Description

Technical Field

[0001] This invention belongs to the field of high-temperature and high-pressure airflow transportation technology, and specifically relates to a high-temperature and high-pressure airflow transmission pipeline structure. Background Technology

[0002] The most basic approach to safely transporting high-temperature airflow is to use metal pipes. However, the allowable strength of metal materials decreases significantly under high temperatures. If used in pressure pipelines, this necessitates a substantial increase in pipe wall thickness, significantly raising manufacturing costs. To withstand high temperatures, a traditional method is to modify the pipe wall structure with a water-cooling mechanism, essentially creating a sandwich structure where flowing water or other media cools the pipe, thus lowering the wall temperature and increasing the allowable stress. However, this results in significant temperature loss. Alternatively, high-temperature resistant non-metallic materials can be used to construct pipes. These pipes can withstand high temperatures, but due to their material properties, they cannot withstand high pressures, and the connections between pipes are difficult to resolve. Summary of the Invention

[0003] The purpose of this invention is to provide a high-temperature and high-pressure airflow transmission pipeline structure that can achieve safe transmission of high-temperature and high-pressure airflow, reduce temperature and pressure losses, and lower the requirements for pipeline materials and wall thickness.

[0004] One aspect of the present invention provides a high-temperature and high-pressure airflow transmission pipeline structure, the structure being divided into three layers: the outermost layer is a water-cooled metal outer cylinder, the middle layer is a heat-insulating and pressure-equalizing layer, and the innermost layer is a pressure-equalizing inner cylinder.

[0005] The inner side of the water-cooled metal outer cylinder is provided with a cooling water jacket, and the cooling water jacket is provided with jacket water channels and water channel baffles. The end of the water-cooled metal outer cylinder is provided with a water-cooled flange, which is connected to an external cooling water pipe. The water-cooled flange is provided with radial water channels, and the cooling water from the cooling water pipe enters the jacket water channel through the radial water channels. The water channel baffles are used to isolate the cooling water in the jacket water channel to flow in different channels.

[0006] The end of the pressure equalizing inner cylinder is provided with a female and male interface. The female and male interface is a fence-type structure. The fence-type structure forms a pressure equalizing hole when plugged in. The pressure equalizing hole is used to release pressure to the outside of the pressure equalizing inner cylinder, so that the pressure inside and outside of the pressure equalizing inner cylinder is balanced.

[0007] The heat insulation and pressure equalization layer is filled with inorganic non-metallic thermal insulation material, which is used to transfer pressure to the water-cooled metal outer cylinder and reduce the thermal stress of the pressure equalization inner cylinder.

[0008] Preferably, with the pressure-equalizing inner cylinder connected in the plug-in connection, the mutual obstruction area of ​​the grid structure can be adjusted by circumferentially rotating the female and male interfaces, thereby adjusting the size of the pressure-equalizing holes.

[0009] Preferably, the female-female interface includes a female port and a female port, with the distance between the female port and the female port being longer than that between the female ports, which can reduce the thermal stress of the pressure-equalizing inner cylinder.

[0010] Preferably, the water-cooled metal outer cylinder is interconnected at both ends via the water-cooled flange, and the pressure-equalizing inner cylinder is interconnected at both ends via the female-female interface.

[0011] Preferably, the material of the pressure-equalizing inner cylinder is a non-metallic ceramic material, and the inorganic non-metallic thermal insulation material is zirconium oxide fiber or alumina fiber.

[0012] Preferably, the pressure equalizing inner cylinder is supported by a support block, and the support block is made of the same material as the pressure equalizing inner cylinder.

[0013] According to the high-temperature and high-pressure airflow transmission pipeline structure of the present invention, high-temperature and high-pressure airflow can be transmitted with less temperature and pressure loss, ensuring temperature field uniformity, and significantly reducing costs and improving safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0015] Figure 1 This is a schematic diagram of a high-temperature and high-pressure airflow transmission pipeline structure according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of a water-cooled flange according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the pressure-equalizing inner cylinder according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of a pressure equalization hole according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of a support block according to an embodiment of the present invention. Detailed Implementation

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

[0021] The embodiments of the present invention provide a high-temperature and high-pressure airflow transmission pipeline structure that can meet the safe transmission of high-temperature and high-pressure airflow above 1500℃, reduce temperature and pressure losses, and lower the requirements for pipeline materials and wall thickness. Figure 1 This is a schematic diagram of a high-temperature, high-pressure airflow transmission pipeline structure according to an embodiment of the present invention. Figure 1 As shown, the high-temperature and high-pressure airflow transmission pipeline structure of one embodiment of the present invention consists of three layers: the outermost layer is a water-cooled metal outer cylinder 1, the middle layer is a heat-insulating and pressure-equalizing layer 2, and the innermost layer is a pressure-equalizing inner cylinder 3. In this three-layer structure, the pressure-equalizing inner cylinder 3 bears the temperature, while the water-cooled metal outer cylinder 1 bears the pressure.

[0022] A water-cooled flange 4 is provided at the end of the water-cooled metal outer cylinder 1. The water-cooled metal outer cylinder 1 is connected to the front and rear sections through the water-cooled flange 4. A cooling water jacket 5 is provided inside the water-cooled metal outer cylinder 1. Figure 2 This is a schematic diagram of the structure of a water-cooled flange and cooling water jacket according to an embodiment of the present invention. Figure 2 As shown, the cooling water jacket 5 is provided with jacket water channels 11 and water channel baffles 12. The water channel baffles 12 are axially arranged to isolate the jacket water channels 11 and prevent uneven distribution of cooling water. The water-cooled flange 4 is provided with radial water channels 13. The water-cooled flange 4 is connected to an external cooling water pipe via a threaded joint. Cooling water enters the jacket water channels 11 of the cooling water jacket 5 through the radial water channels 13 in the water-cooled flange 4. By providing water channel baffles 12 in the cooling water jacket 5 of the water-cooled metal outer cylinder 1, the cooling water in the jacket water channels 11 is isolated and flows in different channels, preventing cooling water from concentrating in the lower part of the cooling water jacket 5 and reducing the cooling effect. The cooling water simultaneously cools the inner wall surfaces of the cooling flange 4 and the water-cooled metal outer cylinder 1, reducing the temperature. Under the same strength requirements, the material thickness can be reduced, thus lowering costs.

[0023] Figure 3 This is a schematic diagram of the structure of the pressure-equalizing inner cylinder according to an embodiment of the present invention. Figure 3As shown, the end of the equalizing inner cylinder 3 is provided with a female-female interface 21, through which the equalizing inner cylinder 3 is connected to the front and rear sections. The function of the equalizing inner cylinder 3 is to withstand the direct impact of the high-temperature airflow and simultaneously transmit the airflow pressure to the outside of the inner cylinder. To withstand the high temperature, the material of the equalizing inner cylinder 3 is a non-metallic ceramic material. Ceramic material itself does not have sealing properties, but due to its relatively dense structure, it has a large pressure resistance, which will create a large pressure difference between the inner and outer walls of the inner cylinder. To balance the pressure, female-female interfaces 21 are provided at the front and rear ends of the equalizing inner cylinder 3. The female-female interface 21 has a grid-like structure. When the front and rear sections of the equalizing inner cylinder 3 are connected, the grid-like structure on the female-female interface 21 forms an equalizing hole 22 when inserted. Figure 4 As shown. The equalizing hole 22 can release pressure to the outside of the equalizing inner cylinder 3 when airflow passes through, so as to balance the pressure inside and outside the inner cylinder. When the equalizing inner cylinder 3 of the front and rear sections are connected by insertion, the mutual blocking area of ​​the grid structure can be adjusted by rotating the circumferential male and female interface 21, so as to adjust the size of the equalizing hole 22.

[0024] The female-female interface 21 includes a female port and a female port. The female port is designed to be longer than the female port to accommodate the axial deformation of the inner cylinder 3 after heating, reducing the generation of thermal stress. Additionally, at high temperatures, the material undergoes thermal deformation, generating thermal stress. To reduce the damage caused by thermal stress to the structure, the size of the female port in the female-female interface 21 can have a certain margin to accommodate the thermal deformation of the inner cylinder. Alternatively, an upstream female port and a downstream female port configuration can be used, creating a forward step as the airflow advances, reducing interference with the flow field at the joint.

[0025] The thermal insulation and pressure equalization layer 2 is filled with inorganic non-metallic insulation materials, such as zirconium oxide fiber and alumina fiber. Due to the numerous pores in the fiber material, pressure can be transferred within this layer to the water-cooled metal outer cylinder 1. Simultaneously, because this material has a low thermal conductivity, it provides insulation for the pressure equalization inner cylinder 3, reducing the temperature gradient between the inside and outside of the inner cylinder 3, thereby reducing thermal stress and protecting it. This also reduces heat loss from high-temperature airflow and improves fuel utilization efficiency. The insulation material also provides some support and fixation for the pressure equalization inner cylinder 3.

[0026] The pressure-equalizing inner cylinder 3 is supported by support blocks 6 of the same material and remains concentric with the water-cooled metal outer cylinder 1. Figure 5 This is a schematic diagram of the structure of a support block according to an embodiment of the present invention. Figure 5As shown, the support block 6 has arc surfaces at the top and bottom. The upper arc surface matches the shape of the equalizing inner cylinder 3, and the lower arc surface matches the shape of the water-cooled metal outer cylinder 1. When connecting two or more sections of the high-temperature and high-pressure airflow transmission pipeline structure of this embodiment to form a pipeline for transmitting high-temperature and high-pressure airflow, the equalizing inner cylinder 3 is first placed in the center through the support block 6, and the surrounding area is filled with insulation material. The equalizing inner cylinder 3 is then connected via the male-female interface 21, and the water-cooled metal outer cylinder 1 is sealed via the water-cooled flange 4. During high-temperature and high-pressure airflow transmission, cooling water is connected through the water-cooled flange 4, and the cooling water provides cooling protection for the water-cooled metal outer cylinder 1.

[0027] The high-temperature and high-pressure gas transmission pipeline structure of the present invention has the following beneficial effects:

[0028] 1. This invention can transmit high-pressure, high-temperature airflow with less temperature and pressure loss, ensuring uniformity of the temperature field;

[0029] 2. When this invention is used for high-temperature and high-pressure gas transmission, it can significantly reduce costs and improve safety.

[0030] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-temperature, high-pressure gas transmission pipeline structure, characterized in that: The structure consists of three layers: the outermost layer is a water-cooled metal outer cylinder, the middle layer is a heat-insulating and pressure-equalizing layer, and the innermost layer is a pressure-equalizing inner cylinder. The inner side of the water-cooled metal outer cylinder is provided with a cooling water jacket, and the cooling water jacket is provided with jacket water channels and water channel baffles. The end of the water-cooled metal outer cylinder is provided with a water-cooled flange, which is connected to an external cooling water pipe. The water-cooled flange is provided with radial water channels, and the cooling water from the cooling water pipe enters the jacket water channel through the radial water channels. The water channel baffles are used to isolate the cooling water in the jacket water channel to flow in different channels. The end of the pressure equalizing inner cylinder is provided with a female and male interface. The female and male interface is a fence-type structure. The fence-type structure forms a pressure equalizing hole when plugged in. The pressure equalizing hole is used to release pressure to the outside of the pressure equalizing inner cylinder, so that the pressure inside and outside of the pressure equalizing inner cylinder is balanced. The heat insulation and pressure equalization layer is filled with inorganic non-metallic thermal insulation material, which is used to transfer pressure to the water-cooled metal outer cylinder and reduce the thermal stress of the pressure equalization inner cylinder.

2. The high-temperature and high-pressure airflow transmission pipeline structure according to claim 1, characterized in that: With the pressure-equalizing inner cylinder connected to the front and rear sections, the size of the pressure-equalizing hole can be adjusted by rotating the male and female interfaces circumferentially to adjust the mutual obstruction area of ​​the fence structure.

3. The high-temperature and high-pressure airflow transmission pipeline structure according to claim 1 or 2, characterized in that: The female-female interface includes a female port and a female port, with the female port being longer than the female port, which can reduce the thermal stress of the pressure-equalizing inner cylinder.

4. The high-temperature and high-pressure gas transmission pipeline structure according to claim 1 or 2, characterized in that: The water-cooled metal outer cylinder is interconnected at both ends via the water-cooled flange, and the pressure-equalizing inner cylinder is interconnected at both ends via the female-female interface.

5. The high-temperature and high-pressure gas transmission pipeline structure according to claim 1 or 2, characterized in that: The material of the pressure-equalizing inner cylinder is a non-metallic ceramic material, and the inorganic non-metallic thermal insulation material is zirconium oxide fiber or alumina fiber.

6. The high-temperature and high-pressure gas transmission pipeline structure according to claim 1 or 2, characterized in that: The pressure equalizing inner cylinder is supported by a support block, and the support block is made of the same material as the pressure equalizing inner cylinder.

Images