High-temperature-resistant and corrosion-resistant oxygen lance metal hose

Abstract

The utility model discloses a kind of high-temperature-resistant corrosion-resistant oxygen lance metal hose, and it relates to a high-temperature-resistant corrosion-resistant oxygen lance metal hose technical field, including pipe body, characterized in that, both ends of the pipe body are provided with end pipe, the inside of the pipe body is sequentially sleeved with inner lining winding pipe, thickening encryption bellows, first steel wire mesh cover, second steel wire mesh cover, non-metallic protective layer and third steel wire mesh cover from inside to outside, both ends of the pipe body are sleeved with stainless steel limiting winding pipe. The utility model has high-temperature-resistant corrosion-resistant performance, and can keep long-term stable oxygen supply circulating water work.

Description

Technical Field

[0001] This utility model relates to the technical field of high-temperature and corrosion-resistant oxygen lance metal hose, specifically to a high-temperature and corrosion-resistant oxygen lance metal hose. Background Technology

[0002] Oxygen lance metal hoses are core flexible components connecting oxygen lances and oxygen supply pipelines in steel smelting and other applications. They must operate for extended periods in environments with high temperatures, strong corrosion from sulfur / nitrogen oxides, and high-frequency mechanical vibration, demanding extremely high performance. Existing hoses suffer from insufficient high-temperature resistance, allowing high-temperature flue gas to easily conduct to the corrugated pipe, causing corrosion and thermal fatigue cracking. This also accelerates corrosion fatigue of the corrugated pipe and metal mesh sleeve, leading to leaks. Furthermore, their corrosion resistance is weak; a single metal mesh sleeve cannot block corrosive media, easily causing wire breakage in the mesh sleeve and cracking and perforation of the corrugated pipe, requiring frequent and costly replacements. They also exhibit poor resistance to damage and bending; the lack of rigid restraint at the ends makes them prone to excessive bending, and the single-layer mesh sleeve in the middle is insufficient to buffer impacts. Finally, their sealing performance is poor, with impurities easily accumulating in the gaps between layers, and loosening and leakage at the end connections. Overall, they have a short lifespan, high maintenance costs, and significant safety risks. Utility Model Content

[0003] In view of the problems existing in the current high-temperature and corrosion-resistant oxygen lance metal hoses, this utility model is proposed.

[0004] Therefore, the purpose of this utility model is to provide a high-temperature and corrosion-resistant oxygen lance metal hose, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-temperature and corrosion-resistant oxygen lance metal hose includes a tube body, with end tubes at both ends of the tube body. The inside of the tube body is sequentially fitted with an inner lining spiral tube, a thickened and densified corrugated tube, a first wire mesh sleeve, a second wire mesh sleeve, a non-metallic protective layer, and a third wire mesh sleeve from the inside out. Stainless steel limiting spiral tubes are fitted at both ends of the tube body.

[0006] Preferably, the end of the end tube away from the tube body is fixedly connected to an installation ring, and the outer wall of the end tube is movably fitted with an installation flange.

[0007] Preferably, the end of the mounting ring furthest from the end tube has multiple annular sealing grooves concentrically formed.

[0008] Preferably, the stainless steel limiting winding tube is a flexible tube.

[0009] Preferably, the non-metallic protective layer is a flexible, high-temperature resistant material such as ceramic fiber cloth.

[0010] Preferably, the stainless steel limiting winding tube has a tighter corrugation than the inner lining winding tube.

[0011] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model features a multi-layered protective structure, which significantly improves the corrosion resistance of the hose. It can effectively block the erosion of corrosive media such as sulfur / nitrogen oxides, reduce wire breakage in the braided sleeve and cracking and perforation of the thickened and densified corrugated pipe, and extend its service life.

[0012] 2. This utility model uses a non-metallic protective layer made of ceramic fiber cloth, which has excellent high temperature resistance and can block the transmission of high temperature flue gas to the thickened and densified corrugated pipe, preventing the thickened and densified corrugated pipe from cracking due to thermal fatigue. At the same time, it slows down the aging rate of the inner lining winding pipe and reduces the risk of leakage.

[0013] 3. This utility model uses stainless steel limiting spiral tubes at both ends of the tube body. The corrugations are tighter and more flexible than those of the inner lining spiral tube. This not only limits excessive bending at the end of the hose, but also does not affect the normal flexible connection. Combined with multi-layer steel wire mesh sleeves, it enhances the overall resistance to damage and bending, and can buffer the impact of high-frequency mechanical vibration. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the structure of a high-temperature and corrosion-resistant oxygen lance metal hose proposed in this utility model; Figure 2 for Figure 1 Internal structure diagram; Figure 3 for Figure 2 A magnified schematic diagram of part A in the middle section.

[0016] Explanation of reference numerals in the attached figures: 1. Pipe body; 2. End pipe; 3. Mounting flange; 4. Mounting ring; 5. Stainless steel limiting spiral wound pipe; 6. Inner lining spiral wound pipe; 7. Thickened and densified corrugated pipe; 8. First wire mesh sleeve; 9. Second wire mesh sleeve; 10. Non-metallic protective layer; 11. Third wire mesh sleeve. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model discloses a high-temperature and corrosion-resistant oxygen lance metal hose.

[0019] Reference Figure 1-3 The tube body 1 includes an end tube 2 at both ends. The tube body 1 is fitted with an inner lining spiral tube 6, a thickened and densified corrugated tube 7, a first wire mesh sleeve 8, a second wire mesh sleeve 9, a non-metallic protective layer 10, and a third wire mesh sleeve 11 from the inside out. The tube body 1 is fitted with a stainless steel limiting spiral tube 5 at both ends. The stainless steel limiting spiral tube 5 is a flexible tube, which effectively prevents the corrosion of the tube body by flue gas and high-temperature media. The corrugations of the stainless steel limiting spiral tube 5 are tighter than those of the inner lining spiral tube 6, thereby improving the overall rigidity and preventing the thickened and densified corrugated tube 7 from bending excessively, which would reduce its fatigue life.

[0020] Reference Figure 1-3 An installation ring 4 is fixedly connected to the end of the end pipe 2 away from the pipe body 1. An installation flange 3 is movably sleeved on the outer wall of the end pipe 2. Multiple annular sealing grooves are concentrically opened on the end of the installation ring 4 away from the end pipe 2.

[0021] Reference Figure 1-3 The non-metallic protective layer 10 is made of ceramic fiber cloth, which improves the overall protective layer to be more compact, thus effectively isolating temperature, external corrosion, and buffering external mechanical forces from damaging the thickened and densified corrugated pipe 7.

[0022] In this invention, the hose is connected to the oxygen lance and oxygen supply pipeline at both ends via mounting flange 3 and mounting ring 4, respectively. The annular sealing groove ensures the sealing performance at the connection point, preventing media leakage. The inner lining of the hose body 1, consisting of an inner spiral wound tube 6, a thickened and reinforced corrugated tube 7, a multi-layer steel wire mesh sleeve, and a non-metallic protective layer 10, forms a composite protective structure that can withstand high-temperature environments and resist corrosive media erosion. The stainless steel limiting spiral wound tube 5 prevents the hose from being damaged due to excessive bending during use, while the multi-layer steel wire mesh sleeve enhances the overall structural strength and buffers mechanical vibration impact. When the oxygen lance is operating, the hose can stably deliver oxygen while maintaining good performance under harsh environments such as high temperature, corrosion, and vibration, reducing replacement frequency and ensuring continuous smelting operations.

[0023] The foregoing description only illustrates certain exemplary embodiments of the present invention. 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 above 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 and corrosion-resistant oxygen lance metal hose, comprising a hose body (1), characterized in that, Both ends of the tube body (1) are provided with end tubes (2). The inside of the tube body (1) is sequentially fitted with an inner lining winding tube (6), a thickened and encrypted corrugated tube (7), a first wire mesh sleeve (8), a second wire mesh sleeve (9), a non-metallic protective layer (10), and a third wire mesh sleeve (11). Both ends of the tube body (1) are fitted with stainless steel limiting winding tubes (5).

2. The high-temperature and corrosion-resistant oxygen lance metal hose according to claim 1, characterized in that, The end of the end tube (2) away from the tube body (1) is fixedly connected to an installation ring (4), and the outer wall of the end tube (2) is movably fitted with an installation flange (3).

3. The high-temperature and corrosion-resistant oxygen lance metal hose according to claim 2, characterized in that, The mounting ring (4) has multiple annular sealing grooves concentrically formed at the end away from the end tube (2).

4. The high-temperature and corrosion-resistant oxygen lance metal hose according to claim 1, characterized in that, The stainless steel limiting spiral tube (5) is a flexible tube.

5. The high-temperature and corrosion-resistant oxygen lance metal hose according to claim 1, characterized in that, The non-metallic protective layer (10) is ceramic fiber cloth.

6. The high-temperature and corrosion-resistant oxygen lance metal hose according to claim 1, characterized in that, The stainless steel limiting spiral tube (5) has a tighter corrugation than the inner lining spiral tube (6).

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