Flexible connection pipe for oil tanks

Abstract

This utility model provides a flexible connecting pipe for oil tanks, belonging to the technical field of flexible oil tank pipes. It includes a pipe body and connectors adapted to the pipe body. The pipe body includes an inner composite lining layer and an outer sheath. The inner composite lining layer includes a protective layer made of food-grade silicone, with a corrugated axial cross-section. A pressure relief layer is provided outside the protective layer, and the inner wall of the pressure relief layer closely matches the corrugated structure of the outer wall of the protective layer. A spiral steel strip is provided outside the pressure relief layer. This utility model effectively buffers pressure fluctuations within the pipe during the transportation of rice bran oil in the oil tank, mitigating the risk of overpressure and avoiding damage caused by localized stress concentration. It also significantly improves the overall strength of the pipe, increasing its maximum internal oil pressure resistance and reducing the risk of bulging and pipe bursts due to high internal pressure. This provides strong support for production stability and has a promising market prospect.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of flexible pipelines for oil tanks, specifically a flexible connection pipeline for oil tanks. Background Technology

[0002] In the rice bran oil industry, oil tanks are specialized containers in the industrial chain, serving a function throughout the entire production and storage process: during pretreatment, they temporarily store crude rice bran oil to prevent rancidity; during refining, they transfer semi-finished oil to ensure continuous production; and finally, they are used to store refined rice bran oil. Oil tanks are connected to upstream and downstream process equipment (such as oil presses, refining tanks, and packaging lines) through flexible connecting pipes. These pipes have good flexibility and sealing properties, and can adapt to slight deformations caused by changes in the weight of the medium during oil loading and unloading. At the same time, they can buffer vibrations during equipment operation and avoid the problems of loose joints and oil leakage that are prone to occur with rigid connections.

[0003] The mainstream materials for flexible connecting pipes used in oil tanks are food-grade rubber (such as oil-resistant nitrile rubber) and food-grade silicone. Food-grade rubber is resistant to rice bran oil corrosion, preventing oil penetration. It is non-toxic, odorless, and chemically stable, hardly reacting with the components in rice bran oil, thus ensuring the cleanliness of the oil. However, in actual use, the internal explosion-proof and pressure-resistant capabilities of these flexible connecting pipes are relatively weak. Sometimes, bulging or pipe bursting may occur due to internal pressure exceeding the rated pressure. The main reasons for high internal pressure are: firstly, operational negligence, such as failure to properly adjust the flow rate of rice bran oil, resulting in pressure exceeding the rated pressure resistance of the flexible pipe; and secondly, fluctuations in operating conditions, such as sudden changes in flow rate during oil tank loading and unloading, which generate pressure shocks and momentarily exceed the upper limit of the pipe's pressure resistance. Both of these can damage the pipe, causing leakage and pollution risks during oil transportation, affecting production safety and oil quality. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model mainly provides a flexible connecting pipe for oil tanks, which solves the technical problem mentioned in the background art that the internal explosion-proof and pressure-resistant capabilities of flexible connecting pipes made of food-grade materials are weak, and that sometimes bulging and pipe bursting occur when the internal pressure exceeds the rated pressure.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A flexible connecting pipe for oil tanks includes a pipe body and connectors adapted to the pipe body. The connectors are located at both ends of the pipe body. The pipe body includes an inner composite lining layer and an outer sheath. The inner composite lining layer includes a protective layer made of food-grade silicone. The axial cross-section of the protective layer is a corrugated structure. A pressure relief layer is provided outside the protective layer, and the inner wall of the pressure relief layer is tightly fitted with the corrugated structure of the outer wall of the protective layer. A steel strip is provided outside the pressure relief layer, and the steel strip is wound in a spiral structure. The connectors include a connector head, and the connector head is provided with an annular interface. The annular interface includes an inner contact portion and an outer contact portion. The inner contact portion has a corrugated structure and is tightly attached to the inner wall of the protective layer. The outer contact portion is located on the outer wall of the outer sheath.

[0007] Furthermore, a sealing layer is provided between the structural layers formed by the outer sheath and the steel strip.

[0008] Furthermore, the steel strip is provided with multiple positioning holes, each of which is engaged with a positioning block, and the positioning blocks are linearly arranged at equal intervals on both sides of the outer wall of the pressure relief layer.

[0009] Furthermore, the connector also includes a locking ring, and the locking ring and the connector are connected by a thread.

[0010] Furthermore, the locking ring is provided with a pressing part, which is located on the outer contact part and is used to press the outer contact part. The outer contact part is composed of multiple arc-shaped metal pieces that are equally spaced around it.

[0011] Furthermore, a sealing sleeve is provided between the outer contact portion and the outer sheath.

[0012] Furthermore, one end of the connector is provided with an annular mounting groove, and a sealing gasket is provided inside the annular mounting groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention features a protective layer with corrugated structures on both the inner and outer sides. The inner corrugated surface contacts the rice bran oil, allowing the flexible deformation of the protective layer to initially buffer the instantaneous pressure within the pipe during the transport of the rice bran oil in the tank. This effectively buffers pressure fluctuations within the pipeline, mitigating the risk of overpressure and preventing damage caused by localized stress concentration. Furthermore, with the corrugated surface of the inner wall of the pressure relief layer and the corrugated surface of the outer side of the lining layer in close contact, the two adapt to each other through flexible deformation, absorbing pressure. When the pipeline expands due to internal pressure, localized stress concentration in the protective layer is avoided, effectively mitigating the risk of overpressure and achieving the purpose of dual flexible pressure relief.

[0015] The steel strip spirally wound around the pressure relief layer can significantly improve the overall strength and damage resistance of the pipeline without affecting its overall flexibility. This increases the maximum pressure resistance of the pipeline, reduces the problems of bulging and pipe bursting due to high internal pressure, and also reduces the deformation and pipe bursting hazards caused by external impacts. It solves the problem of weak resistance to internal pressure of traditional flexible connecting pipes, and reduces the risk of leakage and subsequent maintenance costs in rice bran oil transportation.

[0016] With the pressure relief effect of the double-layer wave structure and the enhanced stability of the steel strip structure, it provides strong support for production stability and has certain application and market prospects.

[0017] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partially exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the axial cross-section of the pipe according to this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the connector of this utility model;

[0022] Figure 5 This is a schematic diagram of the partial protective layer and pressure relief layer structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the cross-section of the locking ring of this utility model.

[0024] In the diagram: 1. Pipe body; 11. Protective layer; 12. Pressure relief layer; 121. Positioning block; 13. Steel strip; 131. Positioning hole; 14. Sealing layer; 15. Outer sheath; 2. Connector; 21. Connector head; 211. Annular mounting groove; 212. Annular mating joint; 213. Inner contact part; 214. Outer contact part; 22. Locking ring; 221. Extrusion part; 3. Sealing sleeve; 4. Sealing gasket. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please refer to the appendix carefully. Figures 1-6 A flexible connecting pipe for oil tanks includes a pipe body 1 and connectors 2 adapted to the pipe body 1. The connectors 2 are located at both ends of the pipe body 1. The pipe body 1 includes an inner composite lining layer and an outer sheath 15. The inner composite lining layer includes a protective layer 11 made of food-grade silicone. The axial cross-section of the protective layer 11 is a corrugated structure. A pressure relief layer 12 is provided outside the protective layer 11. The inner wall of the pressure relief layer 12 is also a corrugated structure, and the inner wall of the pressure relief layer 12 is tightly fitted with the corrugated structure of the outer wall of the protective layer 11. A steel strip is provided outside the pressure relief layer 12. 13, and the steel strip 13 is wound in a spiral structure. The connector 2 includes a connector 21. The connector 21 is provided with an annular interface 212. The annular interface 212 includes an inner contact portion 213 and an outer contact portion 214. The inner contact portion 213 has a wave structure and is in close contact with the inner wall of the protective layer 11. The wave structure of the inner contact portion 213 improves the fit with the inner wall of the protective layer 11, thereby improving the sealing between the connector 21 and the inner wall of the protective layer 11. The outer contact portion 214 is located on the outer wall of the outer sheath 15.

[0029] The aforementioned structure effectively buffers pressure fluctuations within the pipeline during the transportation of rice bran oil from the tank, mitigating the risk of overpressure and preventing damage caused by localized stress concentration. Simultaneously, while ensuring good pipeline flexibility and adaptability to dynamic conditions such as oil tank loading and unloading, it significantly enhances the overall strength and resistance to damage of the pipeline. This increases the pipeline's maximum internal pressure tolerance, reducing the risk of bulging and pipe bursting due to high internal pressure. It also reduces deformation and bursting hazards caused by external impacts, solving the problem of weak internal pressure resistance in traditional flexible connecting pipes. This reduces leakage risks and subsequent maintenance costs during rice bran oil transportation, providing strong support for production stability and demonstrating promising application and market prospects.

[0030] Please refer to the appendix carefully. Figure 2 , Figure 5 and Figure 6 A sealing layer 14 is provided between the structural layers formed by the outer sheath 15 and the steel strip 13. The sealing layer 14 improves the overall sealing performance of the pipeline and avoids local oil leakage. The steel strip 13 is provided with multiple positioning holes 131, and each positioning hole 131 is engaged with a positioning block 121. The positioning blocks 121 are linearly arranged at equal intervals on both sides of the outer wall of the pressure relief layer 12. Through the cooperation between the positioning blocks 121 and the positioning holes 131, the steel strip 13 is stably wound around the outer wall of the pressure relief layer 12, preventing the steel strip 13 from sliding locally when the pipeline is subjected to axial force, which would cause the pitch to change and create a "loophole" in the protection. The connector 2 also includes a locking ring 22. The locking ring 22 and the connector 21 are connected by threads, which facilitates installation and disassembly.

[0031] Please refer to the appendix carefully. Figure 2 , Figure 3 and Figure 4 The locking ring 22 is provided with a pressing part 221, which is located on the outer contact part 214 and is used to press the outer contact part 214. The outer contact part 214 is composed of multiple arc-shaped metal pieces that are equally spaced around it. A sealing sleeve 3 is provided between the outer contact part 214 and the outer sheath 15. As the locking ring 22 rotates on the connector 21, the pressing part 221 on the inner wall of the locking ring 22 will gradually press the arc-shaped metal pieces in the outer contact part 214, causing the arc-shaped metal pieces to move closer to the sealing sleeve 3 and tightly lock the sealing sleeve 3 on the outer sheath 15, thereby improving the sealing performance of the connection. One end of the connector 21 is provided with an annular mounting groove 211, and a sealing gasket 4 is provided in the annular mounting groove 211. The sealing gasket 4 improves the sealing performance at the interface between the pipeline and the oil tank.

[0032] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A flexible connection pipe for an oil tank, comprising a pipe body (1) and connectors (2) adapted to the pipe body (1), the connectors (2) being located at both ends of the pipe body (1), the pipe body (1) comprising an inner composite lining layer and an outer sheath (15), characterized in that, The inner lining composite layer includes a protective layer (11) made of food-grade silicone. The axial cross section of the protective layer (11) is a wave structure. A pressure relief layer (12) is provided outside the protective layer (11). The inner wall of the pressure relief layer (12) is closely fitted with the wave structure of the outer wall of the protective layer (11). A steel strip (13) is provided outside the pressure relief layer (12). The steel strip (13) is wound in a spiral structure. The connector (2) includes a connector (21). An annular interface (212) is provided on the connector (21). The annular interface (212) includes an inner contact part (213) and an outer contact part (214). The inner contact part (213) is a wave structure. The inner contact part (213) is in close contact with the inner wall of the protective layer (11). The outer contact part (214) is located on the outer wall of the outer sheath (15).

2. The flexible connection pipeline for an oil tank according to claim 1, characterized in that, A sealing layer (14) is provided between the structural layers consisting of the outer sheath (15) and the steel strip (13).

3. The flexible connection pipeline for an oil tank according to claim 2, characterized in that, The steel strip (13) is provided with a plurality of positioning holes (131), and each positioning hole (131) is fitted with a positioning block (121). The positioning blocks (121) are linearly arranged at equal intervals on both sides of the outer wall of the pressure relief layer (12).

4. The flexible connection pipeline for oil tanks according to claim 1, characterized in that, The connector (2) also includes a locking ring (22), and the locking ring (22) and the connector (21) are connected by a thread.

5. The flexible connection pipeline for an oil tank according to claim 4, characterized in that, The locking ring (22) is provided with a pressing part (221), which is located on the outer contact part (214) and is used to press the outer contact part (214). The outer contact part (214) is composed of multiple arc-shaped metal sheets that are equally spaced around it.

6. A flexible connection pipeline for an oil tank according to claim 5, characterized in that, A sealing sleeve (3) is provided between the outer contact part (214) and the outer sheath (15).

7. The flexible connection pipeline for an oil tank according to claim 4, characterized in that, One end of the connector (21) is provided with an annular mounting groove (211), and a sealing gasket (4) is provided inside the annular mounting groove (211).

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