High temperature pipe connection structure

Abstract

The utility model discloses a high temperature pipeline connecting structure relates to pipeline connecting structure field. The high temperature pipeline connecting structure, including first flange and corresponding installation's second flange, its characterized in that, first flange and second flange outer wall are fixedly connected with first connecting ring and second connecting ring respectively, and first connecting ring is fixedly connected with sealing frame, and sealing frame is installed with pressure gauge and inflation assembly. The high temperature pipeline connecting structure, first connecting ring and second connecting ring are fixedly connected on the outer wall of first flange and second flange respectively, and the sealing frame is fixedly connected on the first connecting ring, and the annular cavity is formed after assembling the high temperature pipeline connecting structure, the gas is filled into the annular cavity through the inflation assembly, the pressure in the annular cavity is increased, the specific value of the pressure in the annular cavity is displayed by the pressure gauge, and whether the installation is qualified can be judged by observing the pressure indication number.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection structures, and in particular to a high-temperature pipe connection structure. Background Technology

[0002] Modern industry has stringent requirements for the safety and sealing of high-temperature pipeline connections. Most of them use high-temperature resistant alloy materials and flexible sealing technology. Through precise thread locking and welding reinforcement design, leakage risks are eliminated, which is the core connection guarantee of modern high-temperature fluid transportation systems.

[0003] Existing high-temperature pipeline connection structures are components of pipeline systems used to connect fluids transported under high-temperature conditions. Their core functions are to ensure sealing, high-temperature resistance, and structural stability. Some use a connection method with flanges and single-layer gaskets. However, after the connection structure is installed, it is not convenient to conduct a sealing test. If there is any improper operation during the installation process, there is a risk of leakage. After being put into use, high-temperature fluids are prone to leakage, which may cause safety accidents. At the same time, during the use of the connection structure, the gaskets inside the connection structure are prone to aging. Gasket aging will lead to a sharp drop in sealing performance and a significant increase in the risk of high-temperature fluid leakage. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature pipeline connection structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature pipeline connection structure includes a first flange and a correspondingly installed second flange, characterized in that a first connecting ring and a second connecting ring are respectively fixedly connected to the outer peripheral walls of the first flange and the second flange, a sealing frame is fixedly connected to the first connecting ring, and a pressure gauge and an inflation component are installed on the sealing frame; The first flange, the second flange, the second connecting ring, the first connecting ring, and the sealing frame form an annular cavity, and a sealing element is installed in the annular cavity.

[0006] The sealing element is used to seal the annular cavity, and the sealing element includes: The first sealing gasket is clamped between the first flange and the second flange; The second sealing gasket is clamped between the second connecting ring and the sealing frame.

[0007] The first sealing gasket is provided with a circular groove corresponding to the first flange and the second flange. A fixing bolt is provided between the first flange, the second flange and the first sealing gasket, and the threaded end of the fixing bolt is threaded with a nut.

[0008] The inflation assembly is used to inflate the annular cavity with gas, and the inflation assembly includes: A vent pipe is fixedly connected to the sealing frame and is connected to the annular cavity. A one-way valve is installed on the vent pipe.

[0009] The end of the vent pipe away from the sealing frame is threaded with an installation cap.

[0010] The first flange, the first connecting ring, and the sealing frame are manufactured as a single piece, and the second flange and the second connecting ring are manufactured as a single piece.

[0011] The first and second sealing gaskets are made of flexible graphite composite material.

[0012] The technical effects and advantages of this utility model are as follows: This high-temperature pipeline connection structure has a first connecting ring and a second connecting ring fixedly connected to the outer peripheral walls of the first flange and the second flange, respectively. A sealing frame is fixedly connected to the first connecting ring. After the high-temperature pipeline connection structure is assembled, an annular cavity is formed between the first flange, the second flange, the second connecting ring, the first connecting ring, and the sealing frame. Gas is injected into the annular cavity through the inflation component to increase the pressure inside the annular cavity. The pressure gauge displays the specific value of the pressure inside the annular cavity. On the one hand, by observing the pressure gauge reading, it is possible to determine whether the installation is qualified. On the other hand, if the pressure gauge reading decreases during use, the front-end valve should be closed immediately to effectively prevent leakage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the inflatable component structure of this utility model; Figure 3 This is a schematic diagram of the sealing frame structure of this utility model; Figure 4 This is a schematic diagram of the sealing assembly structure of this utility model; Figure 5 This is a schematic diagram of the pressure gauge structure of this utility model.

[0014] In the figure: 1. First flange; 11. First connecting ring; 12. Sealing frame; 2. Second flange; 21. Second connecting ring; 3. Fixing bolt; 31. Nut; 4. Inflation assembly; 41. Vent pipe; 411. Mounting cap; 42. One-way valve; 5. First sealing gasket; 51. Circular groove; 52. Second sealing gasket; 6. Pressure gauge. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides, for example Figure 1 - Figure 5 The high-temperature pipeline connection structure shown includes a first flange 1 and a corresponding second flange 2. The first flange 1 and the second flange 2 are the core components of the high-temperature pipeline connection, used to connect two high-temperature pipelines, provide basic support for the entire connection structure, and cooperate with other components to achieve a sealed connection. The first flange 1 and the second flange 2 are respectively welded to the ends of the two fluid pipelines that need to be connected. Their material is selected as high-temperature resistant and corrosion resistant alloy steel to adapt to the high-temperature fluid transportation environment.

[0017] A first connecting ring 11 and a second connecting ring 21 are fixedly connected to the outer peripheral walls of the first flange 1 and the second flange 2, respectively. A sealing frame 12 is fixedly connected to the first connecting ring 11. The first connecting ring 11 is fixedly connected to the outer peripheral wall of the first flange 1, and the second connecting ring 21 is fixedly connected to the outer peripheral wall of the second flange 2. Together with the first flange 1, the second flange 2, and the sealing frame 12, they form an annular cavity, providing space for subsequent sealing tests and sealing monitoring during use, ensuring the sealing performance of the connection, and preventing gas leakage from affecting the accuracy of the sealing test. A pressure gauge 6 and an inflation component 4 are installed on the sealing frame 12. The pressure gauge 6 is used to display the specific pressure value in the annular cavity. By observing the reading of the pressure gauge 6, it can be determined whether the installation is qualified. On the other hand, if the reading of the pressure gauge 6 decreases during use, it can be detected in time that the sealing performance has deteriorated. The inflation component 4 is used to fill the annular cavity with gas to increase the pressure in the annular cavity, so as to conduct sealing tests and monitor the sealing performance during use.

[0018] The first flange 1, the second flange 2, the second connecting ring 21, the first connecting ring 11, and the sealing frame 12 form an annular cavity, and a sealing element is installed in the annular cavity.

[0019] The seal is used to seal an annular cavity, and the seal includes: The first sealing gasket 5 is sandwiched between the first flange 1 and the second flange 2. The first sealing gasket 5 plays a sealing role to prevent high-temperature fluid from leaking from the connection between the first flange 1 and the second flange 2. The first sealing gasket 5 is made of flexible graphite composite material and has good high temperature resistance, corrosion resistance and sealing performance. The second sealing gasket 52 is sandwiched between the second connecting ring 21 and the sealing frame 12. The second sealing gasket 52 further enhances the sealing performance and prevents gas from leaking from the connection between the second connecting ring 21 and the sealing frame 12.

[0020] The first sealing gasket 5 is provided with a circular groove 51 corresponding to the first flange 1 and the second flange 2. A fixing bolt 3 is provided between the first flange 1, the second flange 2 and the first sealing gasket 5, and a nut 31 is threadedly connected to the threaded end of the fixing bolt 3.

[0021] Inflator assembly 4 is used to inflate the annular cavity with gas. Inflator assembly 4 includes: Vent pipe 41 is fixedly connected to sealing frame 12. Vent pipe 41 is connected to annular cavity. Vent pipe 41 is made of high pressure resistant and corrosion resistant metal pipe. One end is connected to sealing frame 12 by welding. The other end is threaded for connecting installation cap 411. One-way valve 42 is installed on vent pipe 41. One-way valve 42 prevents gas backflow in the annular cavity and ensures that the inflation process proceeds smoothly.

[0022] A mounting cap 411 is threaded onto the end of the vent pipe 41 away from the sealing frame 12. When not inflated, the mounting cap 411 is screwed on to prevent dust and other impurities from entering the vent pipe 41 and the annular cavity.

[0023] The first flange 1, the first connecting ring 11, and the sealing frame 12 are integrally formed; the second flange 2 and the second connecting ring 21 are integrally formed.

[0024] The first sealing gasket 5 and the second sealing gasket 52 are made of flexible graphite composite material. Flexible graphite composite material has excellent high temperature resistance and can withstand high temperature conditions without damage; it has good sealing performance and can effectively prevent fluid leakage; it has good flexibility and can better fit the contact surface; and it is corrosion resistant, which can extend the service life of the gasket and ensure the reliable operation of the high temperature pipeline connection structure.

[0025] Embodiment 1: In the connection scenario of high-temperature fluid pipelines, it is necessary to first weld the first flange plate 1 and the second flange plate 2 to the ends of two fluid pipelines to be connected respectively. Both are made of high-temperature resistant and corrosion-resistant alloy steel to adapt to the high-temperature fluid conveying environment. A sealing member is installed, in which the first sealing gasket 5 made of flexible graphite composite material is clamped between the first flange plate 1 and the second flange plate 2, and the circular slot hole 51 thereon is aligned with the two flange plates; the second sealing gasket 52 is clamped between the second connecting ring 21 and the sealing frame 12. After corresponding installation, the first flange plate 1, the second flange plate 2, the second connecting ring 21, the first connecting ring 11 and the sealing frame 12 jointly form an annular cavity. Then, the fixing bolt 3 is sequentially passed through the circular slot holes 51 of the first flange plate 1, the second flange plate 2 and the first sealing gasket 5, and the nut 31 is screwed on the threaded end and tightened with a torque wrench according to the specified torque. Since the first flange plate 1, the first connecting ring 11 and the sealing frame 12 are manufactured by integral molding, and the second flange plate 2 and the second connecting ring 21 are manufactured by integral molding, this structure enhances the overall connection strength and sealing performance, and provides a reliable foundation for subsequent sealing tests and use.

[0026] Embodiment 2: After the installation is completed, a sealing test is performed on the high-temperature pipeline connection structure. The inflation assembly 4 starts to work. One end of its vent pipe 41 is welded to the sealing frame 12 and communicates with the annular cavity, and the other end is threaded and connected with a mounting cap 411. At this time, the mounting cap 411 is unscrewed, gas is charged into the annular cavity through the vent pipe 41, and the check valve 42 installed on the vent pipe 41 prevents gas backflow. As the gas is charged, the pressure in the annular cavity increases, and the pressure value displayed by the pressure gauge 6 installed on the sealing frame 12 is observed. If the value is stable within a reasonable range, it indicates that the installation is qualified and all joints are well sealed; if the value is abnormal, it indicates that there is a problem with the installation, and the installation needs to be rechecked. During use, if the reading of the pressure gauge 6 decreases, it means that the sealing performance is degraded, and there may be problems such as gasket aging. At this time, the front-end valve can be closed immediately to prevent high-temperature fluid leakage and ensure the safe and stable operation of the high-temperature pipeline connection structure.

[0027] Finally, it should be noted that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Although the present utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall all be included within the protection scope of the present utility model.

Claims

1. A high-temperature pipeline connection structure, comprising a first flange (1) and a correspondingly installed second flange (2), characterized in that, A first connecting ring (11) and a second connecting ring (21) are fixedly connected to the outer peripheral walls of the first flange (1) and the second flange (2), respectively. A sealing frame (12) is fixedly connected to the first connecting ring (11), and a pressure gauge (6) and an inflation assembly (4) are installed on the sealing frame (12). An annular cavity is formed between the first flange (1), the second flange (2), the second connecting ring (21), the first connecting ring (11), and the sealing frame (12), and a sealing element is installed in the annular cavity.

2. The high-temperature pipeline connection structure according to claim 1, characterized in that, The sealing element is used to seal the annular cavity, and the sealing element includes: The first sealing gasket (5) is clamped between the first flange (1) and the second flange (2); The second sealing gasket (52) is held between the second connecting ring (21) and the sealing frame (12).

3. The high-temperature pipeline connection structure according to claim 2, characterized in that, The first sealing gasket (5) is provided with a circular groove (51) corresponding to the first flange (1) and the second flange (2). A fixing bolt (3) is provided between the first flange (1), the second flange (2) and the first sealing gasket (5). The threaded end of the fixing bolt (3) is threaded with a nut (31).

4. The high-temperature pipeline connection structure according to claim 1, characterized in that, The inflation assembly (4) is used to inflate gas into the annular cavity, and the inflation assembly (4) includes: Ventilation pipe (41) is fixedly connected to sealing frame (12), and the ventilation pipe (41) is connected to an annular cavity; A one-way valve (42) is installed on the vent pipe (41).

5. A high-temperature pipeline connection structure according to claim 4, characterized in that, The end of the vent pipe (41) away from the sealing frame (12) is threaded with an installation cap (411).

6. A high-temperature pipeline connection structure according to claim 1, characterized in that, The first flange (1), the first connecting ring (11) and the sealing frame (12) are integrally formed, and the second flange (2) and the second connecting ring (21) are integrally formed.

7. A high-temperature pipeline connection structure according to claim 2, characterized in that, The first sealing gasket (5) and the second sealing gasket (52) are made of flexible graphite composite material.

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