A composite protective cover for a heat receiving surface pipe

Abstract

The utility model belongs to pipeline protection technical field especially relates to a kind of composite protective cover of heating surface pipeline.It is a kind of composite protective cover of heating surface pipeline, comprising: heating surface pipeline, including at least one vertical pipeline and the horizontal pipeline of two adjacent rows parallel arrangement;And layered protective structure, comprising: at least one first protective structure, the first protective structure is configured to the outer surface of the horizontal pipeline and is fastened connection with it;At least one second protective structure, the second protective structure is connected with the first protective structure cooperation;And at least one third protective structure, the third protective structure is configured to the outer portion of the first protective structure and the second protective structure and is connected with cooperation;The first protective structure, the second protective structure and the third protective structure with the way of superposition surround the key eroded parts of the heating surface pipeline and constitute a closed protective structure for blocking the smoke gas invasion path.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline protection technology, and in particular relates to a composite protective cover for heated pipeline surfaces. Background Technology

[0002] In industrial sectors such as thermal power plants, boilers are the core heat energy conversion equipment. Their internal heating surface pipes, such as superheater tubes, reheater tubes, and water-cooled wall tubes, are constantly exposed to high-temperature, high-velocity flue gas. This flue gas often contains abrasive fly ash particles, which, driven by the high-speed airflow, continuously scour and wear down the outer walls of the heating surface pipes. This scouring and wear not only leads to thinning of the pipe walls, reducing their pressure-bearing capacity, but in severe cases, can even cause pipe leaks or tube ruptures, directly threatening the safe and stable operation of the boiler and potentially causing significant economic losses and environmental impacts.

[0003] To mitigate or prevent erosion and wear on heated pipe surfaces and extend their service life, existing technologies typically employ protective devices installed on the windward or easily worn areas of the pipe. Traditional protective devices are mostly simple, semi-open abrasion-resistant tiles, usually made of wear-resistant metal materials and fixed to localized areas of the pipe by welding or bolts. However, these traditional protective devices have several shortcomings: First, their structure is often single-layered and only covers a specific direction of the pipe (such as the windward side), failing to provide comprehensive, enclosed protection. High-speed flue gas (especially when the flue gas velocity reaches or exceeds 30 m / s) can still easily penetrate through the edge gaps of the abrasion-resistant tiles or uncovered areas, continuing to erode the pipe body. Second, there are often assembly gaps between the abrasion-resistant tiles and the pipe. During long-term operation, these gaps tend to widen due to thermal expansion and contraction, making it easier for flue gas to seep in and reducing the protective effect. In addition, traditional single-layer protective structures are prone to failure due to thermal deformation, erosion and wear in high-temperature and high-speed flue gas environments, and are difficult to maintain, especially when replacing or repairing them in confined spaces, which involves a large workload, high difficulty and high maintenance costs.

[0004] Therefore, there is an urgent need for a heat-receiving surface pipeline protection structure that can provide more comprehensive and reliable protection, while also possessing good sealing performance, resistance to thermal deformation, and ease of maintenance. This would effectively solve the problems of poor protection effect, prominent safety hazards, and high maintenance costs caused by the structural limitations, poor sealing performance, and inconvenient maintenance of traditional protection devices. Utility Model Content

[0005] The purpose of this invention is to solve the aforementioned technical problems by providing a composite protective cover for heated surface pipes. By superimposing its first, second, and third protective structures around the critical erosion areas of the heated surface pipe, a closed protective structure is formed to block the intrusion path of flue gas. This aims to provide an improved solution that effectively blocks the erosion of heated surface pipes by high-temperature, high-pressure flue gas, thereby enhancing the comprehensiveness and reliability of the protection.

[0006] A composite protective cover for heated pipe surfaces, comprising:

[0007] The heated surface piping includes at least one vertical pipe and two adjacent rows of parallel horizontal pipes; and

[0008] Layered protective structure, including:

[0009] At least one first protective structure is disposed on and fastened to the outer surface of the horizontal pipe;

[0010] At least one second protective structure, wherein the second protective structure is connected in conjunction with the first protective structure;

[0011] And at least one third protective structure, the third protective structure being disposed outside and connected to the first protective structure and the second protective structure;

[0012] The first protective structure, the second protective structure, and the third protective structure are stacked around the critical erosion-prone parts of the heated surface pipe to form a closed protective structure for blocking the intrusion path of flue gas.

[0013] Furthermore, the first protective structure surrounds and covers the outer surface of each column of the horizontal pipes, and the configuration of the first protective structure enables it to provide overhead and lateral protection for the horizontal pipes.

[0014] Furthermore, the second protective structure has a square-shaped structure and at least one U-shaped slot is provided on one or both sides facing the first protective structure. The inner contour of the U-shaped slot is adapted to be inserted and rigidly connected to the outer surface of the corresponding first protective structure. The configuration of the second protective structure enables it to provide lateral protection for the horizontal pipe.

[0015] Furthermore, the third protective structure has a square main body and at least one arc-shaped groove is provided on one or both sides facing the first protective structure. The curved surface of the arc-shaped groove matches and is inserted into the top outer surface of the first protective structure, and the third protective structure forms a rigid connection with the first protective structure and the second protective structure.

[0016] Furthermore, both the square structure of the second protective structure and the square structure of the third protective structure are provided with at least one through hole at their mutually aligned positions, and the vertical pipes of the heated surface pipe are sequentially inserted into the through holes, with the through holes corresponding to the positions of the vertical pipes.

[0017] Furthermore, a high-temperature lining layer is filled between the inner surfaces of the first protective structure, the second protective structure, and the third protective structure and the outer wall of the heated surface pipe, as well as between the interfaces where the protective structures cooperate with each other.

[0018] Furthermore, the high-temperature lining layer is composed of a non-metallic high-temperature resistant lining material, which fills the potential gaps between each protective structure and the heated surface pipe, and covers the gaps.

[0019] Furthermore, the first protective structure, the second protective structure, and the third protective structure are all made of metal.

[0020] Furthermore, gaps are provided between the protective structures and between them and the heated surface pipes to allow each layer to expand or contract independently, or elastic connectors are provided.

[0021] Furthermore, the first protective structure, the second protective structure, the third protective structure, and the high-temperature lining layer are all modular components that can be independently disassembled and replaced.

[0022] The beneficial effects of this utility model are:

[0023] This utility model provides a composite protective cover for heated surface pipes. A first, second, and third protective structure are stacked around the key erosion-prone areas of the heated surface pipe, forming a closed protective structure to block the intrusion path of flue gas. This fundamentally overcomes the limitations of traditional semi-open anti-wear tiles, which only provide localized and unidirectional protection. It provides a more comprehensive and three-dimensional coverage of the heated surface pipe, effectively preventing high-temperature, high-pressure flue gas from directly eroding the pipe body through gaps or uncovered areas from all directions, significantly improving the integrity and effectiveness of the protection. Through the tight cooperation and connection between the various protective structures, and the final closed structure, the sealing performance of the entire protective system is greatly enhanced, reducing localized erosion and heat loss caused by flue gas leakage. This more effectively protects the heated surface pipe, extends its service life, reduces the risk of leakage and pipe bursts due to pipe wear, and improves the safety and reliability of equipment operation. Attached Figure Description

[0024] Figure 1 This is a front view of the layered protective structure;

[0025] Figure 2 This is a side view of a layered protective structure.

[0026] Figure 3 This is a top view of the layered protective structure;

[0027] Reference numerals: 10, heated surface pipe; 101, vertical pipe; 102, horizontal pipe; 20, layered protective structure; 201, first protective structure; 202, second protective structure; 203, third protective structure. Detailed Implementation

[0028] The following detailed description, in conjunction with embodiments, provides a further specific account of the composite protective cover for heated pipe surfaces according to this utility model. For the sake of simplicity, this document cannot exhaustively list all alternative technical features and implementation schemes included in this utility model. Therefore, those skilled in the art should understand that any technical feature and implementation scheme within this embodiment does not limit the scope of protection of this utility model. The scope of protection includes all alternative technical features and implementation schemes adopted by those skilled in the art without inventive effort. Specifically, any implementation scheme obtained by replacing any technical feature in this utility model or combining any two or more technical features provided by this utility model should be within the scope of protection of this utility model.

[0029] This embodiment provides a composite protective cover for the heated surface pipe 10, such as Figures 1-3 As shown, it includes:

[0030] The heated surface pipe 10 includes at least one vertical pipe 101 and two adjacent rows of parallel horizontal pipes 102; and

[0031] Layered protective structure 20, including:

[0032] At least one first protective structure 201 is disposed on and fastened to the outer surface of the horizontal pipe 102;

[0033] At least one second protective structure 202, which is connected to the first protective structure 201.

[0034] And at least one third protective structure 203, which is disposed outside the first protective structure 201 and the second protective structure 202 and is connected thereto;

[0035] The first protective structure 201, the second protective structure 202, and the third protective structure 203 are stacked around the key scour-prone parts of the heated surface pipe 10 to form a closed protective structure for blocking the intrusion path of flue gas.

[0036] In one specific embodiment, a composite protective cover for a heated surface pipe 10 is provided to protect the heated surface pipe 10 in an environment with high temperature and high-speed flue gas scouring. The heated surface pipe 10 may include at least one vertically oriented vertical pipe 101 and at least two adjacent and parallel horizontally oriented pipes 102. The layered protective structure 20 includes at least one first protective structure 201, at least one second protective structure 202, and at least one third protective structure 203. The first protective structure 201 is disposed on the outer surface of the horizontal pipe 102 and is fastened to it by means of, for example, bolts. The second protective structure 202 is connected to the first protective structure 201 by means of, for example, plugging or welding. The third protective structure 203 is disposed outside the first protective structure 201 and the second protective structure 202 and is also connected to them by means of, for example, plugging or welding. These three protective structures surround the critical erosion areas of the heated surface pipe 10 from the inside out and are superimposed on each other, together forming a closed protective system that can effectively block the intrusion path of flue gas and protect the heated surface pipe 10 from flue gas corrosion.

[0037] In some embodiments, a first protective structure 201 surrounds and covers the outer surface of each row of horizontal pipes 102, and the configuration of the first protective structure 201 enables it to provide overhead and lateral protection to the horizontal pipes 102.

[0038] More specifically, a typical implementation of the first protective structure 201 employs two or more prefabricated covers that surround and tightly cover the outer surface of each row of horizontal ducts 102. This configuration allows the first protective structure 201 to directly withstand the initial impact and abrasion from flue gas and fly ash particles from above and the sides, providing basic protection for the horizontal ducts 102.

[0039] In some embodiments, the second protective structure 202 has a square-shaped structure and at least one U-shaped slot is provided on one or both sides facing the first protective structure 201. The inner contour of the U-shaped slot is adapted to be inserted and rigidly connected to the outer surface of the corresponding first protective structure 201. The configuration of the second protective structure 202 enables it to provide lateral protection for the horizontal pipe 102.

[0040] Based on the above specific embodiments, the second protective structure 202 preferably has a square-shaped structure, which helps it to form a stable overlap with the first protective structure 201 and the subsequent third protective structure 203. The second protective structure 202 has at least one U-shaped slot, the inner contour of which is designed to fit tightly to the outer surface of the corresponding first protective structure 2011 and achieve insertion. After insertion, the two are rigidly connected by welding or other methods. This connection method not only ensures the stability of the structure but also further improves the lateral sealing, enabling the second protective structure 202 to effectively provide stronger lateral protection for the horizontal pipe 102.

[0041] In some embodiments, the third protective structure 203 has a square-shaped structure and at least one arc-shaped groove is provided on one or both sides facing the first protective structure 201. The curved surface of the arc-shaped groove matches and is inserted into the top outer surface of the first protective structure 201, and the third protective structure 203 forms a rigid connection with the first protective structure 201 and the second protective structure 202.

[0042] Based on the above specific embodiments, the third protective structure 203 also preferably has a square-shaped main body to facilitate the regularity and stability of the overall structure. At least one arc-shaped groove is provided in the area where it needs to mate with the top of the first protective structure 201. The curved surface of this groove is designed to precisely match and insert with the top outer surface (usually arc-shaped) of the first protective structure 201. After insertion, the third protective structure 203 forms a strong rigid connection with the top of the first protective structure 201 and the upper or side portion of the second protective structure 202 through welding or other methods, thereby covering the joint area of ​​the lower structure and providing crucial top-down protection for the heated surface pipe 10.

[0043] In some embodiments, the square structure of the second protective structure 202 and the square structure of the third protective structure 203 are each provided with at least one through hole at their mutually aligned positions, and the vertical pipe 101 of the heated surface pipe 10 is sequentially inserted into the through hole, with the through hole corresponding to the position of the vertical pipe 101.

[0044] When the vertical pipe 101 of the heated surface pipe 10 needs to pass through the protective structure, both the square structure of the second protective structure 202 and the square structure of the third protective structure 203 have at least one through hole pre-installed at their aligned locations corresponding to the path of the vertical pipe 101. The diameter and position of the through hole are precisely designed to allow the vertical pipe 101 to pass smoothly and sequentially through the structure, while minimizing weak points in the protection caused by the opening. The through hole ensures that the vertical pipe 101 can pass through the entire multi-layer protective structure without affecting the overall coverage of the protective structure.

[0045] In some embodiments, a high-temperature lining layer is filled between the inner surfaces of the first protective structure 201, the second protective structure 202, and the third protective structure 203 and the outer wall of the heated surface pipe 10, as well as between the interfaces where the protective structures cooperate with each other.

[0046] Based on the above specific embodiments, in order to achieve a higher level of sealing, one or more layers of high-temperature lining material can be filled between the inner surfaces of the first protective structure 201, the second protective structure 202, and the third protective structure 203 and the outer wall of the heated surface pipe 10, as well as at the interfaces where the various protective structures cooperate (e.g., the mating surface between the U-shaped groove and the first protective structure 201, the mating surface between the arc-shaped groove and the first protective structure 201, the butt joint of the cover unit, etc.). This filling upgrades the original closed protective structure, which was only composed of metal structures, into a fully enclosed protective system containing flexible sealing materials.

[0047] In some embodiments, the high-temperature lining layer is composed of a non-metallic high-temperature resistant lining material, which fills and covers the potential gaps between each protective structure and the heated surface pipe 10.

[0048] Based on the above specific embodiments, the high-temperature plastering layer preferably uses a non-metallic plastering material with good high-temperature resistance, sealing performance, and a certain degree of plasticity, such as high-temperature sealing putty, ceramic fiber coating, or special refractory castable. It fills the potential gaps between each metal protective structure and the heated surface pipe 10, completely covering these gaps. This not only provides excellent sealing during initial installation but also, due to its material properties, can adapt to minor deformations of metal components caused by temperature changes during equipment operation, maintaining the integrity of the seal.

[0049] In some embodiments, the first protective structure 201, the second protective structure 202, and the third protective structure 203 are all made of metal.

[0050] In some embodiments, gaps are provided between the protective structures and between them and the heated surface pipe 10, allowing each layer to expand or contract independently, or elastic connectors are provided.

[0051] Based on the above specific embodiments, the first protective structure 201, the second protective structure 202, and the third protective structure 203 are all made of metal materials with good high-temperature resistance and erosion resistance, such as heat-resistant alloy steel or carbon steel with special surface treatment. In order to cope with the structural stress concentration and damage that may be caused by inconsistent thermal expansion of different components under high-temperature environment, during the design, expansion gaps of specific sizes can be reserved between each layer of metal protective structure, and between the metal protective structure and the heated surface pipe 10, or flexible connectors can be used at the connection points to ensure that each layer of protective structure can undergo relatively independent thermal expansion or contraction of a certain range when heated.

[0052] In some embodiments, the first protective structure 201, the second protective structure 202, the third protective structure 203, and the high-temperature lining layer are all configured as modular components that can be independently disassembled and replaced.

[0053] Based on the specific embodiments described above, the first protective structure 201 (e.g., its cover unit), the second protective structure 202, the third protective structure 203, and the high-temperature lining layer (especially when it is in the form of prefabricated blocks or easily removable and refillable materials) can all be designed as modular components with independent disassembly and replacement capabilities. This modular design allows for quick and convenient repair or replacement of only the damaged modular component when a component in a specific area or layer of the protective structure is damaged or reaches the end of its service life, without requiring large-scale disassembly and repair of the entire bulky protective structure. This significantly improves maintenance efficiency and reduces maintenance costs and downtime.

[0054] For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations, but obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this invention.

Claims

1. A composite protective cover for a heated surface pipe, characterized in that, include: The heated surface piping includes at least one vertical pipe and two adjacent rows of parallel horizontal pipes. as well as Layered protective structure, including: At least one first protective structure is disposed on and fastened to the outer surface of the horizontal pipe; At least one second protective structure, wherein the second protective structure is connected in conjunction with the first protective structure; And at least one third protective structure, the third protective structure being disposed outside and connected to the first protective structure and the second protective structure; The first protective structure, the second protective structure, and the third protective structure are stacked around the critical erosion-prone parts of the heated surface pipe to form a closed protective structure for blocking the intrusion path of flue gas.

2. The composite protective cover for the heated surface pipe according to claim 1, characterized in that, The first protective structure surrounds and covers the outer surface of each column of horizontal pipes, and the configuration of the first protective structure enables it to provide overhead and lateral protection for the horizontal pipes.

3. The composite protective cover for the heated surface pipe according to claim 2, characterized in that, The second protective structure has a square main body and at least one U-shaped slot is provided on one or both sides facing the first protective structure. The inner contour of the U-shaped slot is adapted to be inserted and rigidly connected to the outer surface of the corresponding first protective structure. The configuration of the second protective structure enables it to provide lateral protection for the horizontal pipe.

4. The composite protective cover for the heated surface pipe according to claim 3, characterized in that, The third protective structure has a square main body and at least one arc-shaped groove is provided on one or both sides facing the first protective structure. The curved surface of the arc-shaped groove matches and is inserted into the top outer surface of the first protective structure, and the third protective structure forms a rigid connection with the first protective structure and the second protective structure.

5. The composite protective cover for the heated surface pipe according to claim 4, characterized in that, Both the square structure of the second protective structure and the square structure of the third protective structure have at least one through hole at their mutually aligned positions. The vertical pipes of the heated surface pipe are sequentially inserted into the through holes, and the positions of the through holes correspond to the positions of the vertical pipes.

6. The composite protective cover for the heated surface pipe according to any one of claims 1 to 5, characterized in that, A high-temperature lining layer is filled between the inner surfaces of the first protective structure, the second protective structure, and the third protective structure and the outer wall of the heated surface pipe, as well as between the interfaces where the protective structures cooperate with each other.

7. The composite protective cover for the heated surface pipe according to claim 6, characterized in that, The high-temperature lining layer is composed of a non-metallic high-temperature resistant lining material, which fills the potential gaps between each protective structure and the heated surface pipe, and covers the gaps.

8. The composite protective cover for the heated surface pipe according to claim 7, characterized in that, The first protective structure, the second protective structure, and the third protective structure are all made of metal.

9. The composite protective cover for the heated surface pipe according to claim 8, characterized in that, The protective structures are provided with gaps between each other and with the heated surface pipes, allowing each layer to expand or contract independently, or with elastic connectors.

10. The composite protective cover for the heated surface pipe according to any one of claims 7 to 9, characterized in that, The first protective structure, the second protective structure, the third protective structure, and the high-temperature lining layer are all modular components that can be independently disassembled and replaced.

Images