An offshore oil transfer hose with a double protection framework and its preparation method

Abstract

The present invention provides an offshore oil transfer hose with a double protection skeleton and a preparation method thereof. The offshore oil transfer hose includes a pipe body, a flange connector arranged inside the pipe body, a sealing assembly installed between individual flange connectors, a third sealing ring located inside the sealing assembly, and fastening bolts for connecting and fixing individual flange connectors. The pipe body includes a first oil-resistant inner rubber layer; the flange connector includes a flange pipe, a compensation ring arranged inside the flange pipe, and a first sealing ring arranged outside the compensation ring and engaged inside the flange pipe for sealing. There are fastening bolts connecting between individual flange connectors; the auxiliary skeleton sleeve is installed outside the flange connector and is arranged at one of the left and right ends of the pipe body, and an oil leakage observation system is installed inside the auxiliary skeleton sleeve. This offshore oil transfer hose solves the problems of easy leakage and poor safety performance of offshore floating oil transfer hoses in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field related to marine oil transportation, and specifically to a marine oil transportation hose with a double protection framework and a preparation method thereof. Background Technique

[0002] In recent years, the field of marine oil and gas exploitation has developed rapidly. To continuously transport the rich oil and gas on the seabed, it is necessary to connect them through the closed connection of oil transportation hoses. Marine oil transportation hoses are currently the key equipment for marine oil and gas external transportation.

[0003] Marine floating oil transportation hoses are used for oil transportation operations on the sea surface all year round, and are extremely vulnerable to reasons such as sea wind, waves, ocean currents, and seawater corrosion, resulting in oil leakage accidents of the pipe body. First, once the crude oil leaks, the toxic compounds such as benzene and toluene contained in the crude oil will quickly pollute the marine environment and cause catastrophic damage to the marine environment and marine life. Second, the collection of crude oil is difficult, time-consuming, and costly. Third, the crude oil leakage will cause the entire oil transportation work to stop. Fourth, the replacement of the oil transportation hose requires the simultaneous construction operations of cranes, engineering ships, a large number of workers, and divers. The construction process requires high coordination, with high construction difficulty and high construction costs.

[0004] For the above reasons, it is particularly necessary to develop a double-skeleton marine oil transportation hose with anti-pollution, anti-leakage, and high safety. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a marine oil transportation hose with a double protection framework and a preparation method thereof, which solves the problems of easy leakage and poor safety performance of existing marine floating oil transportation hoses.

[0007] (2) Technical Solutions

[0008] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0009] A marine oil transportation hose with a double protection framework and a preparation method thereof. The marine oil transportation hose includes a pipe body, a flange connector provided inside the pipe body, a sealing component installed between individual flange connectors, a third sealing ring located inside the sealing component, fastening bolts for connecting and fixing individual flange connectors, and an anti-pull-off ring for positioning the pipe body. Among them,

[0010] The pipe body includes a first oil-resistant inner rubber layer, a first cord pressure-bearing layer disposed outside the first oil-resistant inner rubber layer, and a steel bar skeleton reinforcement layer disposed outside the first cord pressure-bearing layer. A steel wire reinforcement layer for increasing the installation strength penetrates through the inside of the steel bar skeleton reinforcement layer, and a second cord pressure-bearing layer is disposed outside the steel bar skeleton reinforcement layer. A first oil-resistant outer rubber layer is installed outside the second cord pressure-bearing layer, and a spacer layer is disposed outside the first oil-resistant outer rubber layer;

[0011] The flange connecting member includes a flange pipe, a compensation ring disposed inside the flange pipe, and a first sealing ring disposed outside the compensation ring and engaged inside the flange pipe for sealing. A fastening bolt is connected between the individual flange connecting members, and an anti-pulling-off ring is disposed outside the fastening bolt;

[0012] The sealing assembly includes a limit ring, a limit block disposed inside the limit ring, and a second sealing ring installed outside the limit ring. A third sealing ring is attached to the inner end of the limit block;

[0013] The auxiliary skeleton sleeve is installed outside the flange connecting member and is disposed at one of the left and right ends of the pipe body. An oil leakage observation system is installed inside the auxiliary skeleton sleeve, and the inside of the auxiliary skeleton sleeve is communicated with the inside of the spacer layer.

[0014] In a possible implementation manner, the pipe body further includes a second inner rubber layer disposed outside the spacer layer, a third cord pressure-bearing layer installed outside the second inner rubber layer, a second outer rubber layer installed outside the third cord pressure-bearing layer, a floating layer for floating disposed outside the second outer rubber layer, a fourth cord pressure-bearing layer disposed outside the floating layer, and a third outer rubber layer disposed outside the fourth cord pressure-bearing layer.

[0015] In a possible implementation manner, fastening bolts for connecting and fixing the flange pipes are arranged at equal angles between the individual flange pipes, and a groove structure is formed inside the flange pipe for installing the sealing assembly and the third sealing ring, and the longitudinal section of the groove structure for installing the third sealing ring is trapezoidal.

[0016] In a possible implementation manner, the longitudinal section of the compensation ring is trapezoidal, one end of the compensation ring is fixedly welded to the flange pipe, and the outside of the compensation ring is in contact with the other flange pipe.

[0017] In a possible implementation manner, the limit ring is elastically connected to the flange pipe through a spring, the longitudinal section of the limit ring is trapezoidal, a groove structure is formed inside the limit ring, the longitudinal section of the groove structure is trapezoidal, a limit block with a longitudinal section in a "T" shape is arranged inside the groove structure, and the limit block is slidably connected to both the flange pipe and the limit ring.

[0018] In a possible implementation, the limiting blocks are arranged at equal angles with respect to the center of the third sealing ring.

[0019] In a possible implementation, the anti-pull-off rings are evenly arranged on the outer side of the flange pipe, and the anti-pull-off rings are wrapped by the pipe body.

[0020] In a possible implementation, the oil leakage observation system includes a mechanical oil leakage detection device, an additionally installed electronic tuning fork detection sensor, a wireless transmission and reception module, an industrial control computer, a PLC and other peripheral circuits, and cables for connection.

[0021] In a possible implementation, the winding step between the first oil-resistant inner rubber layer and the flange pipe includes: taking the pipe body with an inner diameter of 400 mm as an example;

[0022] Step 1:

[0023] Select a pipe core with an inner diameter of 400 mm, grind and remove rust from it, and then apply a release agent.

[0024] Step 2:

[0025] Install flange pipes at both ends of the pipe core and fix them on the pipe core.

[0026] Step 3:

[0027] Wind the first oil-resistant inner rubber layer with a thickness of 1 mm and a width of 100 mm on the flange pipe and the pipe core, and the winding thickness is 4 mm.

[0028] In a possible implementation, the raw material composition and preparation method required for the pipe body include:

[0029] The first oil-resistant inner rubber layer is composed of the following materials: oil-resistant nitrile rubber, with a weight ratio of 50:70; the filler reinforcing agent is carbon black N330, with a weight ratio of 10:20; the plasticizer is dioctyl phthalate, with a weight ratio of 5:10; the activator is magnesium oxide, with a weight ratio of 1:3; the antioxidant has a weight ratio of 0.5:1;

[0030] The first cord pressure-bearing layer, the second cord pressure-bearing layer, the third cord pressure-bearing layer, and the fourth cord pressure-bearing layer are composed of the following materials: polyester or nylon friction tape;

[0031] The steel bar skeleton reinforcement layer is composed of the following materials: nitrile and chloroprene rubber, with a weight ratio of 20:30; the reinforcing agent is carbon black N774, with a weight ratio of 5:10; the plasticizer is iron oxide red and phenolic resin, with a weight ratio of 0.5:2; cut into narrow rubber strips and filled into the gaps between the spiral steel wires;

[0032] The first oil-resistant outer rubber layer and the third outer rubber layer are composed of the following materials: cis-butadiene, neoprene, styrene-butadiene rubber, with a weight ratio of 30:40; the reinforcing agent is carbon black N330, with a weight ratio of 10:15. The first oil-resistant outer rubber layer and the third outer rubber layer should have resistance to aging, wear, light, and salt spray;

[0033] The floating layer is mainly an HDPE board (high-density polyethylene board) with a melting point of about 130 °C and a relative density of 0.941 - 0.960;

[0034] Step 1:

[0035] Wind the first cord pressure-bearing layer around the outside of the first oil-resistant inner rubber layer. The number of winding layers is an even number, and the winding angle is 45 - 55°. Wind the outer end of the first cord pressure-bearing layer to the outside of the anti-pull-off ring arranged on the outside of the flange pipe, and perform winding positioning with the anti-pull-off ring. A binding wire is spirally wound at the interface of the first cord pressure-bearing layer, and this binding wire should meet the quality requirements specified in BS3592:1, with a minimum tensile strength of 650 N / mm 2 , and the binding wire should be wound around the flange pipe joint for 3 - 4 circles and fixed by welding, and then wound equidistantly on the first cord pressure-bearing layer and the flange pipe. The winding process of both ends is the same;

[0036] Step 2:

[0037] Wind the steel bar framework reinforcement layer around and covering the outside of the first cord pressure-bearing layer, and a wire reinforcement layer is spirally wound on the inside of the steel bar framework reinforcement layer;

[0038] Step 3:

[0039] Wind the second cord pressure-bearing layer around the outside of the steel bar framework reinforcement layer. The winding directions of the adjacent cord layers of the reinforcement layer are opposite, and the other winding methods are the same, and perform winding positioning with the anti-pull-off ring;

[0040] Step 4:

[0041] Cover the first oil-resistant outer rubber layer on the outside of the second cord pressure-bearing layer, and extend to cover the entire hose and stop at the position of the flange pipe neck;

[0042] Step 5:

[0043] Set a spacer layer on the outside of the first oil-resistant outer rubber layer;

[0044] Step 6:

[0045] Repeat steps two to four for winding, so that the second inner rubber layer covers the outside of the spacer layer, the third cord pressure-bearing layer is wound around the outside of the second inner rubber layer, the second outer rubber layer covers the outside of the third cord pressure-bearing layer, and bundling steel wires are provided at the joints of the first cord pressure-bearing layer, the second cord pressure-bearing layer, the third cord pressure-bearing layer and the fourth cord pressure-bearing layer with the flange pipe. The bundling steel wires should be wound around the flange pipe joint for 3 to 4 circles and fixed by welding, and then wound equidistantly on the first cord pressure-bearing layer, the second cord pressure-bearing layer, the third cord pressure-bearing layer, the fourth cord pressure-bearing layer and the flange pipe. The winding process of the two ends is the same;

[0046] Step seven:

[0047] Then cover the floating layer on the outside of the second outer rubber layer, then wind the fourth cord pressure-bearing layer around the floating layer, and finally cover the third outer rubber layer on the outside of the fourth cord pressure-bearing layer. The third outer rubber layer extends to cover the entire hose and ends at the position of the flange pipe neck.

[0048] (III) Beneficial effects

[0049] The present invention provides an offshore oil transportation hose with a double protection skeleton and a preparation method thereof. The pipe body includes a first oil-resistant inner rubber layer, a first cord pressure-bearing layer arranged on the outside of the first oil-resistant inner rubber layer, and a steel bar skeleton reinforcement layer arranged on the outside of the first cord pressure-bearing layer. A steel wire reinforcement layer for increasing the installation strength penetrates through the inside of the steel bar skeleton reinforcement layer, and a second cord pressure-bearing layer is arranged on the outside of the steel bar skeleton reinforcement layer. A first oil-resistant outer rubber layer is installed on the outside of the second cord pressure-bearing layer, and a spacer layer is arranged on the outside of the first oil-resistant outer rubber layer. The pipe body further includes a second inner rubber layer arranged on the outside of the spacer layer, a third cord pressure-bearing layer is installed on the outside of the second inner rubber layer, a second outer rubber layer is installed on the outside of the third cord pressure-bearing layer, and a floating layer for floating is arranged on the outside of the second outer rubber layer. A fourth cord pressure-bearing layer is arranged on the outside of the floating layer, and a third outer rubber layer is arranged on the outside of the fourth cord pressure-bearing layer. When the main skeleton layer formed by the first oil-resistant inner rubber layer to the first oil-resistant outer rubber layer encounters damage and fails, the crude oil will gather in the spacer layer between the main skeleton layer and the auxiliary skeleton layer formed by the second inner rubber layer to the second outer rubber layer. The auxiliary skeleton layer can still bear the crude oil load and oil resistance from the main skeleton layer, prevent the crude oil from leaking and flowing out to pollute the ocean, and greatly improve the safety performance of the oil transportation hose.

[0050] The present invention provides an offshore oil transportation hose with a double protection skeleton and a preparation method thereof. By using the oil leakage observation system installed inside the auxiliary skeleton sleeve and the inside of the auxiliary skeleton sleeve being communicated with the inside of the spacer layer, when leakage occurs inside the spacer layer, the crude oil enters the auxiliary skeleton sleeve to trigger the oil leakage observation system to alarm, so that the whole pipe body can be replaced in time to avoid causing more leakage.

[0051] The present invention provides an offshore oil transfer hose with a double protection skeleton and a preparation method thereof. The limiting ring is elastically connected to the flange pipe through a spring, and the longitudinal section of the limiting ring is trapezoidal. A groove-like structure is provided on the inner side of the limiting ring, and the longitudinal section of the groove-like structure is trapezoidal. A limiting block with a longitudinal section in a "T" shape is arranged in the groove-like structure, and the limiting block is slidably connected to both the flange pipe and the limiting ring. After the flange pipe monomers are connected and fixed, the limiting ring monomers are brought into contact with each other. Subsequently, the limiting blocks arranged at equal angles with respect to the center of the third sealing ring move inward, causing the third sealing ring to fit into the groove-like structure on the inner side of the flange pipe, thereby achieving a tight seal. At the same time, the longitudinal section of the compensation ring is trapezoidal, one end of the compensation ring is fixedly welded to the flange pipe, and the outer side of the compensation ring is in contact with the other flange pipe, which can further increase the compensation for the gap between the flange pipe monomers, thereby further enhancing the sealing performance and anti-leakage performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it in accordance with the content of the specification, the following describes the preferred embodiments of the present invention in detail in conjunction with the accompanying drawings.

[0053] Figure 1 Front view structural schematic diagram of the connection between the pipe body and the flange connector in Embodiment 1;

[0054] Figure 2 Overall structural schematic diagram of the pipe body in Embodiment 1;

[0055] Figure 3 Front view structural schematic diagram of the connection between the flange connector and the sealing assembly in Embodiment 1;

[0056] Figure 4 Side view structural schematic diagram of the connection between the limiting ring and the limiting block in Embodiment 1;

[0057] Figure 5 For Embodiment 1 Figure 3 Enlarged structural schematic diagram at position A;

[0058] Figure 6 Overall structural schematic diagram of the connection between the flange connector and the pipe body in Embodiment 1;

[0059] Figure 7 For Embodiment 1 Figure 1 Enlarged structural schematic diagram at position B;

[0060] Figure 8 Main index diagram of the first oil-resistant inner rubber layer and the second inner rubber layer in Embodiment 1;

[0061] Figure 9Main index diagram of the third outer rubber layer in Embodiment 1;

[0062] Figure 10 Schematic diagram of the overall connection structure of the oil leakage observation system in Embodiment 1.

[0063] Legend: 1 - pipe body; 101 - first oil-resistant inner rubber layer; 102 - first cord pressure-bearing layer; 103 - steel bar skeleton reinforcement layer; 104 - second cord pressure-bearing layer; 105 - first oil-resistant outer rubber layer; 106 - spacer layer; 107 - second inner rubber layer; 108 - third cord pressure-bearing layer; 109 - second outer rubber layer; 110 - floating layer; 111 - fourth cord pressure-bearing layer; 112 - third outer rubber layer; 113 - steel wire reinforcement layer;

[0064] 2 - flange connector; 201 - flange pipe; 202 - compensating ring; 203 - first sealing ring;

[0065] 3 - sealing assembly; 301 - limiting ring; 302 - second sealing ring; 303 - limiting block;

[0066] 4 - third sealing ring; 5 - fastening bolt; 6 - anti-pull-off ring; 7 - auxiliary skeleton sleeve;

[0067] 8 - oil leakage observation system; 801 - mechanical oil leakage detection device; 802 - electronic tuning fork detection sensor; 803 - wireless transmission and reception module; 804 - industrial control computer; 805 - peripheral circuits such as PLC; 806 - cable;

[0068] 9 - bundling steel wire. Detailed implementation manners

[0069] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. In addition, for the convenience of description below, the "upper", "lower", "left", "right", etc. cited are consistent with the upper, lower, left, right, etc. of the accompanying drawings themselves. The "first", "second", etc. in the following text are for distinction in description and have no other special meanings.

[0070] In view of the problems existing in the prior art, the present invention provides an offshore oil transfer hose with a double protection framework and a preparation method thereof. The offshore oil transfer hose includes a pipe body, a flange connecting member disposed inside the pipe body, a sealing assembly installed between individual flange connecting members, a third sealing ring inside the sealing assembly, fastening bolts for connecting and fixing the individual flange connecting members, and an anti-pulling-off ring for positioning the pipe body, which are specifically described as follows:

[0071] 1 - Pipe body

[0072] The above-mentioned pipe body includes a first oil-resistant inner rubber layer, a first cord pressure-bearing layer disposed outside the first oil-resistant inner rubber layer, and a steel bar framework reinforcement layer disposed outside the first cord pressure-bearing layer. A steel wire reinforcement layer for increasing the installation strength penetrates through the inside of the steel bar framework reinforcement layer, and a second cord pressure-bearing layer is disposed outside the steel bar framework reinforcement layer. A first oil-resistant outer rubber layer is installed outside the second cord pressure-bearing layer, and a spacer layer is disposed outside the first oil-resistant outer rubber layer. The main framework layer is composed of the first oil-resistant inner rubber layer to the first oil-resistant outer rubber layer to cope with internal damage. When the main framework layer is damaged, the crude oil will gather in the spacer layer between the main framework layer and the auxiliary framework layer composed of the second inner rubber layer to the second outer rubber layer.

[0073] In some examples, the above-mentioned pipe body further includes a second inner rubber layer disposed outside the spacer layer, a third cord pressure-bearing layer installed outside the second inner rubber layer, a second outer rubber layer installed outside the third cord pressure-bearing layer, a floating layer for floating disposed outside the second outer rubber layer, a fourth cord pressure-bearing layer disposed outside the floating layer, and a third outer rubber layer disposed outside the fourth cord pressure-bearing layer. When the main framework layer is damaged, the crude oil will gather in the spacer layer between the main framework layer and the auxiliary framework layer composed of the second inner rubber layer to the second outer rubber layer. The auxiliary framework layer can still bear the crude oil load and oil resistance from the main framework layer, preventing the leakage and outflow of crude oil to pollute the ocean, and greatly improving the safety performance of the oil transfer hose.

[0074] In some examples, the winding step between the first oil-resistant inner rubber layer and the flange pipe includes: taking the pipe body with an inner diameter of 400 mm as an example;

[0075] Step 1:

[0076] Select a pipe core with an inner diameter of 400 mm, grind and remove rust from it, and then apply a release agent.

[0077] Step 2:

[0078] Install flange pipes at both ends of the pipe core and fix them on the pipe core.

[0079] Step 3:

[0080] Wind the first oil-resistant inner rubber layer with a thickness of 1 mm and a width of 100 mm around the flange pipe and the pipe core, with a winding thickness of 4 mm.

[0081] In some examples, the raw material composition and preparation method of the above-mentioned pipe body include:

[0082] The above-mentioned first oil-resistant inner rubber layer is composed of the following materials: oil-resistant nitrile rubber, with a weight ratio of 50:70; the filler reinforcing agent is carbon black N330, with a weight ratio of 10:20; the plasticizer is dioctyl phthalate, with a weight ratio of 5:10; the activator is magnesium oxide, with a weight ratio of 1:3; the antioxidant has a weight ratio of 0.5:1;

[0083] The above-mentioned first cord pressure-bearing layer, second cord pressure-bearing layer, third cord pressure-bearing layer and fourth cord pressure-bearing layer are composed of the following materials: polyester or nylon friction cloth;

[0084] The above-mentioned steel bar skeleton reinforcement layer is composed of the following materials: nitrile and chloroprene rubber, with a weight ratio of 20:30; the reinforcing agent is carbon black N774, with a weight ratio of 5:10; the plasticizer is iron oxide red and phenolic resin, with a weight ratio of 0.5:2; cut into narrow rubber strips and filled in the gaps between the spiral steel wires;

[0085] The above-mentioned first oil-resistant outer rubber layer and the third outer rubber layer are composed of the following materials: cis-butadiene, chloroprene, styrene-butadiene rubber, with a weight ratio of 30:40; the reinforcing agent is carbon black N330, with a weight ratio of 10:15. The above-mentioned first oil-resistant outer rubber layer and the third outer rubber layer should have resistance to aging, wear, light, and salt spray;

[0086] The above-mentioned floating layer is mainly an HDPE board (high-density polyethylene board) with a melting point of about 130 °C and a relative density of 0.941 - 0.960. It has comprehensive properties such as good heat resistance and cold resistance, is not easy to adhere, is not easy to absorb water, has good chemical stability, and has a small density. It also has high rigidity and toughness and good mechanical strength;

[0087] Step 1:

[0088] Wind the first cord pressure-bearing layer around the outside of the first oil-resistant inner rubber layer. The number of winding layers is an even number, and the winding angle is 45 - 55°. And wind the outer end of the first cord pressure-bearing layer outside the anti-pull-off ring arranged on the flange pipe and carry out winding positioning with the anti-pull-off ring. And at the interface of the first cord pressure-bearing layer, a binding steel wire is spirally wound, and this binding steel wire should meet the quality requirements specified in BS3592:1, with a minimum tensile strength of 650 N / mm 2 , the binding steel wire should be wound around the flange pipe joint for 3 - 4 circles and fixed by welding and then wound equidistantly on the first cord pressure-bearing layer and the flange pipe. The winding process of the two ends is the same;

[0089] Step 2:

[0090] Wrap the steel bar framework reinforcement layer around the outside of the first cord pressure-bearing layer, and a steel wire reinforcement layer is spirally wound on the inner side of the steel bar framework reinforcement layer;

[0091] Step Three:

[0092] Wrap the second cord pressure-bearing layer around the outside of the steel bar framework reinforcement layer, and the winding directions of the adjacent cord layers of the reinforcement layer are opposite, and the remaining winding methods are the same, and wind and position it with the anti-pull-off ring;

[0093] Step Four:

[0094] Cover the first oil-resistant outer rubber layer on the outside of the second cord pressure-bearing layer, and extend it to cover the entire hose and stop at the flange pipe neck position;

[0095] Step Five:

[0096] Set a spacer layer on the outside of the first oil-resistant outer rubber layer;

[0097] Step Six:

[0098] Repeat Steps Two to Four for winding, so that the second inner rubber layer covers the outside of the spacer layer, the third cord pressure-bearing layer winds around the outside of the second inner rubber layer, the second outer rubber layer covers the outside of the third cord pressure-bearing layer, and bundling steel wires are provided at the joints of the first cord pressure-bearing layer, the second cord pressure-bearing layer, the third cord pressure-bearing layer and the fourth cord pressure-bearing layer with the flange pipe. The bundling steel wires should be wound 3 - 4 circles and fixed by welding at the flange pipe joint and then wound equidistantly on the first cord pressure-bearing layer, the second cord pressure-bearing layer, the third cord pressure-bearing layer and the fourth cord pressure-bearing layer and the flange pipe, and the winding processes of the two ends are the same;

[0099] Step Seven:

[0100] Subsequently, cover the floating layer on the outside of the second outer rubber layer, then wind the fourth cord pressure-bearing layer around the floating layer, and finally cover the third outer rubber layer on the outside of the fourth cord pressure-bearing layer. The third outer rubber layer extends to cover the entire hose and stops at the flange pipe neck position.

[0101] 2 - Flange Connector

[0102] The above flange connector includes a flange pipe, a compensation ring arranged inside the flange pipe, and a first sealing ring arranged outside the compensation ring and clamped inside the flange pipe for sealing. There are fastening bolts connecting between the above flange connector monomers, and an anti-pull-off ring is arranged outside the fastening bolts. This makes the connection between the flange connector monomers more stable, and at the same time can also increase the installation stability between the pipe body and the flange connector, and can also increase the sealing performance of the connection between the flange connector monomers.

[0103] In some examples, fastening bolts for connecting and fixing the flange pipes are arranged at equal angles between the above-mentioned flange pipe monomers, and a groove-like structure is provided inside the flange pipe for installing a sealing assembly and a third sealing ring, and the longitudinal section of the groove-like structure for installing the third sealing ring is trapezoidal. This can increase the fixing stability between the flange connection monomers.

[0104] In some examples, the longitudinal section of the above-mentioned compensation ring is trapezoidal, one end of the compensation ring is fixedly welded to the flange pipe, and the outer side of the compensation ring is arranged in contact with the other flange pipe. This can increase the sealing performance between the flange pipe monomers and reduce the possibility of leakage.

[0105] In some examples, the above-mentioned anti-pull-off rings are evenly arranged on the outer side of the flange pipe, and the anti-pull-off rings are wrapped by the pipe body. This can prevent the pipe body from separating from the flange connection.

[0106] 3 - Sealing Assembly

[0107] The above-mentioned sealing assembly includes a limit ring, a limit block arranged inside the limit ring, and a second sealing ring installed outside the limit ring. The inner end of the above-mentioned limit block is attached with a third sealing ring. This can further increase the sealing performance between the flange connection monomers.

[0108] In some examples, the above-mentioned limit ring is elastically connected to the flange pipe through a spring, and the longitudinal section of the limit ring is trapezoidal. A groove-like structure is provided inside the limit ring, and the longitudinal section of this groove-like structure is trapezoidal. And a limit block with a longitudinal section in a "T" shape is arranged in this groove-like structure, and the limit block is slidably connected to both the flange pipe and the limit ring. After the flange pipe monomers are connected and fixed, the limit ring monomers are brought into contact with each other. Subsequently, the limit blocks arranged at equal angles around the center of the third sealing ring move inward, causing the third sealing ring to fit with the groove-like structure inside the flange pipe, thereby achieving a tight seal.

[0109] In some examples, the above-mentioned limit blocks are arranged at equal angles around the center of the third sealing ring. This enables the limit blocks to squeeze the third sealing ring in all directions, thereby ensuring the sealing performance.

[0110] 7 - Auxiliary Skeleton Sleeve

[0111] The above-mentioned auxiliary skeleton sleeve is installed on the outer side of the flange connection and is arranged at one of the left and right ends of the pipe body. An oil leakage observation system is installed inside the auxiliary skeleton sleeve, and the inside of the auxiliary skeleton sleeve is communicated with the inside of the spacer layer. When leakage occurs inside the spacer layer, the crude oil enters the auxiliary skeleton sleeve and triggers the oil leakage observation system to give an alarm, so that the entire pipe body can be replaced in time to avoid more leakage.

[0112] In some examples, the above oil spill observation system includes a mechanical oil spill detection device, an added electronic tuning fork detection sensor, a wireless transmission and reception module, an industrial control computer, and peripheral circuits such as a PLC and cables for connection.

[0113] The working principle of the added electronic tuning fork detection sensor is that a pair of piezoelectric crystals installed on the tuning fork base causes the tuning fork to vibrate at a certain resonance frequency. When the tuning fork comes into contact with the measured medium, the frequency and amplitude of the tuning fork change according to the density of the measured medium. These changes are detected, processed by an intelligent circuit and converted into a switch signal. In this way, if oil is detected on the tuning fork sensor fork body, an oil spill signal will be immediately output, increasing the effectiveness of the alarm.

[0114] The wireless transmission and reception module uses a transmission and reception module based on the A7130 chip for data transmission and reception. When the rubber hose leaves the factory, the frequency is modulated to a frequency band open to civilian equipment. After testing, its transmission and reception delay is less than 10 milliseconds. The receiving end of the transmission module and the sending end of the reception module both support 485 communication, reducing wiring and enhancing anti-interference when connecting with the oil spill alarm signal and the industrial control computer. Limited by the support of the 485 communication protocol, currently each pipeline only supports 127 rubber hoses.

[0115] The industrial control computer uses an Advantech industrial control computer to replace the acquisition scheme of a general commercial computer plus a data acquisition card. The multiple 485 and Ethernet interfaces integrated in the industrial control computer facilitate the subsequent function expansion and upgrade, and also facilitate the transmission and exchange of data with the superior finance or production department. A server software for a mobile phone app for real-time display of the rubber hose status is installed on the industrial control computer side. Without the need to rely on a third-party server, as long as the mobile phone and the industrial control computer are on the same network, the normality of the rubber hose can be monitored on the mobile phone side. A barcode scanner is connected to the industrial control computer. When the pipeline is initially installed, the barcode attached to the flange side of each rubber hose can be scanned to enter information such as the rubber hose number, model, production date, and work team into the database, facilitating the timely retrieval of relevant information of the pipe in case of an oil spill alarm of the rubber hose. If the barcode scanner fails temporarily, it can also be manually entered. The configuration software uses MCGS or Beijing Asia Control.

[0116] The function of the PLC in this system is to immediately drive the sound and light control alarm device once oil spill is detected, and close the motors and valves of the oil transfer pump and pressure pump according to the previous settings. Its I / O points can also be connected to buttons or other interfaces to make the oil spill alarm system and the entire oil transfer system an organic whole.

[0117] The cables used in the system are as follows: for the 24V DC power supply, 2x1.5 parallel wires are adopted; for the switch quantity signals, 2x1 parallel wires are used; for the 485 network transmission line after signal acquisition, 2x1 twisted shielded wires are employed; for the three-wire pnp tuning fork switch, 3x1 shielded wires are utilized. All cables are made of the same rubber compound as the oil-resistant outer rubber layer. Parameters such as the ductility, tensile strength, and yield strength of the conductive soft copper wires are the same as those of the rubber compound of the rubber hose. When extruding and forming, no mold release agents, lubricating powders, or other materials that are likely to cause the separation of copper wires and insulating rubber sheaths should be added. After forming, it is not vulcanized first. Instead, it is wound together with other rubber compounds during use and then vulcanized and formed simultaneously with the rubber hose, so as to avoid the delamination of the rubber hose caused by the penetration of the cable. After the cable is led out of the rubber hose, it is connected to a waterproof, corrosion-resistant sealed socket welded to the flange end. The rubber hoses are connected by a connecting cable with multiple terminals and an anti-reverse insertion function, which is simple to plug in and safe and reliable. The mode of combining mechanical contacts with a pnp-type open-collector electronic contact based on frequency detection is adopted to further improve the real-time performance and accuracy.

[0118] Embodiment 1:

[0119] Based on the above concept, as Figures 1 - 10 shown, in the specific application scenario of a marine oil transportation hose with a double protection skeleton provided by the present invention, as Figure 1 , Figure 3 and Figure 6 shown, the marine oil transportation hose includes a pipe body 1, a flange connecting member 2 provided inside the pipe body 1, a sealing assembly 3 installed between the individual flange connecting members 2, a third sealing ring 4 located inside the sealing assembly 3, a fastening bolt 5 for connecting and fixing the individual flange connecting members 2, and an anti-pull-off ring 6 for positioning the pipe body 1. Among them,

[0120] As Figure 1 and Figure 2 shown, the pipe body 1 includes a first oil-resistant inner rubber layer 101, a first cord bearing layer 102 provided outside the first oil-resistant inner rubber layer 101, a steel bar skeleton reinforcement layer 103 provided outside the first cord bearing layer 102. A steel wire reinforcement layer 113 for increasing the installation strength penetrates through the inside of the steel bar skeleton reinforcement layer 103. And a second cord bearing layer 104 is provided outside the steel bar skeleton reinforcement layer 103. A first oil-resistant outer rubber layer 105 is installed outside the second cord bearing layer 104, and a spacer layer 106 is provided outside the first oil-resistant outer rubber layer 105.

[0121] As Figure 3As shown, the flange connection member 2 includes a flange pipe 201, a compensation ring 202 disposed inside the flange pipe 201, and a first sealing ring 203 disposed outside the compensation ring 202 and engaged with the inside of the flange pipe 201 for sealing. A fastening bolt 5 is connected between the individual flange connection members 2, and an anti-pull-off ring 6 is disposed outside the fastening bolt 5.

[0122] As Figure 3 shown, the sealing assembly 3 includes a limit ring 301, a limit block 303 disposed inside the limit ring 301, and a second sealing ring 302 mounted outside the limit ring 301. The inner end of the limit block 303 is fitted with a third sealing ring 4.

[0123] As Figure 1 shown, the auxiliary skeleton sleeve 7 is mounted outside the flange connection member 2 and disposed at one of the left and right ends of the pipe body 1. An oil leakage observation system 8 is installed inside the auxiliary skeleton sleeve 7, and the inside of the auxiliary skeleton sleeve 7 communicates with the inside of the spacer layer 106. The model of the oil leakage observation system 8 is Japan Asahi-CS-1505.

[0124] In a specific application scenario, as Figure 1 shown, the pipe body 1 further includes a second inner rubber layer 107 disposed outside the spacer layer 106. A third cord pressure-bearing layer 108 is installed outside the second inner rubber layer 107. A second outer rubber layer 109 is installed outside the third cord pressure-bearing layer 108. A floating layer 110 for floating is disposed outside the second outer rubber layer 109. A fourth cord pressure-bearing layer 111 is disposed outside the floating layer 110. A third outer rubber layer 112 is disposed outside the fourth cord pressure-bearing layer 111.

[0125] In a specific application scenario, as Figure 3 and Figure 4 shown, fastening bolts 5 for connecting and fixing the flange pipes 201 are arranged at equal angles between the individual flange pipes 201. A groove structure is formed inside the flange pipe 201 for installing the sealing assembly 3 and the third sealing ring 4. The longitudinal section of the groove structure for installing the third sealing ring 4 is trapezoidal.

[0126] In a specific application scenario, as Figure 3 shown, the longitudinal section of the compensation ring 202 is trapezoidal. One end of the compensation ring 202 is fixedly welded to the flange pipe 201, and the outside of the compensation ring 202 is in contact with the other flange pipe 201.

[0127] In a specific application scenario, as Figure 3 、 Figure 5 and Figure 7As shown, the limit ring 301 is elastically connected to the flange pipe 201 through a spring. The longitudinal section of the limit ring 301 is trapezoidal. A groove-like structure is provided on the inner side of the limit ring 301, and the longitudinal section of the groove-like structure is trapezoidal. A limit block 303 with a longitudinal section in the shape of a "T" is arranged in the groove-like structure, and the limit block 303 is slidably connected to both the flange pipe 201 and the limit ring 301.

[0128] In a specific application scenario, such as Figure 4 As shown, the limit blocks 303 are arranged at equal angles with respect to the center of the third sealing ring 4.

[0129] In a specific application scenario, such as Figure 1 As shown, the anti-pull-off rings 6 are evenly arranged on the outer side of the flange pipe 201, and the anti-pull-off rings 6 are wrapped by the pipe body 1.

[0130] In a specific application scenario, such as Figure 10 As shown, the oil leakage observation system 8 includes a mechanical oil leakage detection device 801, an additional electronic tuning fork detection sensor 802, a wireless transmission and reception module 803, an industrial control computer 804, and peripheral circuits 805 such as a PLC and cables 806 for connection.

[0131] In a specific application scenario, the winding steps between the first oil-resistant inner rubber layer 101 and the flange pipe 201 include: taking the pipe body 1 with an inner diameter of 400 mm as an example;

[0132] Step 1:

[0133] Select a pipe core with an inner diameter of 400 mm, grind and remove rust from it, and then apply a release agent.

[0134] Step 2:

[0135] Install the flange pipes 201 at both ends of the pipe core and fix them on the pipe core.

[0136] Step 3:

[0137] Wind the first oil-resistant inner rubber layer 101 with a thickness of 1 mm and a width of 100 mm on the flange pipe 201 and the pipe core, and the winding thickness is 4 mm.

[0138] In a specific application scenario, such as Figure 8 and Figure 9 As shown, the raw material composition and preparation method of the pipe body 1 include:

[0139] The first oil-resistant inner rubber layer 101 is composed of the following materials: oil-resistant nitrile rubber, with a weight ratio of 50:70; the filler and reinforcing agent is carbon black N330, with a weight ratio of 10:20; the plasticizer is dioctyl phthalate, with a weight ratio of 5:10; the activator is magnesium oxide, with a weight ratio of 1:3; the anti-aging agent has a weight ratio of 0.5:1;

[0140] The first cord pressure-bearing layer 102, the second cord pressure-bearing layer 104, the third cord pressure-bearing layer 108, and the fourth cord pressure-bearing layer 111 are composed of the following materials: polyester or nylon friction tape;

[0141] The steel bar skeleton reinforcement layer 103 is composed of the following materials: nitrile and chloroprene rubber, with a weight ratio of 20:30; the reinforcing agent is carbon black N774, with a weight ratio of 5:10; the plasticizer is iron oxide red and phenolic resin, with a weight ratio of 0.5:2; cut into narrow rubber strips and filled in the gaps between the spiral steel wires;

[0142] The first oil-resistant outer rubber layer 105 and the third outer rubber layer 112 are composed of the following materials: cis-butadiene, chloroprene, and styrene-butadiene rubber, with a weight ratio of 30:40; the reinforcing agent is carbon black N330, with a weight ratio of 10:15. The first oil-resistant outer rubber layer 105 and the third outer rubber layer 112 should have resistance to aging, wear, light, and salt spray;

[0143] The floating layer 110 is mainly an HDPE board (high-density polyethylene board) with a melting point of about 130°C and a relative density of 0.941 - 0.960;

[0144] Step 1:

[0145] Wind the first cord pressure-bearing layer 102 around the outside of the first oil-resistant inner rubber layer 101. The number of winding layers is an even number, and the winding angle is 45 - 55°. Wind the outer end of the first cord pressure-bearing layer 102 to the outside of the anti-pull-off ring 6 provided on the outside of the flange pipe 201 for winding and positioning with the anti-pull-off ring 6. And at the interface between the first cord pressure-bearing layer 102 and 201, there is a binding steel wire wound spirally, and this binding steel wire 9 should meet the quality requirements specified in BS3592:1, with a minimum tensile strength of 650 N / mm 2 , the binding steel wire 9 should be wound around and closed 3 - 4 circles at the joint of the flange pipe 201 and fixed by welding and then wound equidistantly on the first cord pressure-bearing layer 102 and the flange pipe 201. The winding process of the two ends is the same;

[0146] Step 2:

[0147] Wind the steel bar skeleton reinforcement layer 103 around and cover the outside of the first cord pressure-bearing layer 102, and there is a steel wire reinforcement layer 113 wound spirally on the inner side of the steel bar skeleton reinforcement layer 103;

[0148] Step 3:

[0149] Wind the second cord pressure-bearing layer 104 around the outside of the steel bar framework reinforcement layer 103, with the winding directions of the adjacent cord layers being opposite while the other winding methods being the same, and wind and position it with the anti-pull-off ring 6.

[0150] Step Four:

[0151] Cover the first oil-resistant outer rubber layer 105 on the outside of the second cord pressure-bearing layer 104, and extend it to cover the entire hose and stop at the position of the neck of the flange pipe 201.

[0152] Step Five:

[0153] Set a spacer layer 106 on the outside of the first oil-resistant outer rubber layer 105.

[0154] Step Six:

[0155] Repeat Steps Two to Four for winding so that the second inner rubber layer 107 covers the outside of the spacer layer 106, the third cord pressure-bearing layer 108 winds around the outside of the second inner rubber layer 107, the second outer rubber layer 109 covers the outside of the third cord pressure-bearing layer 108, and bundling steel wires 9 are provided at the connection positions of the first cord pressure-bearing layer 102, the second cord pressure-bearing layer 104, the third cord pressure-bearing layer 108, and the fourth cord pressure-bearing layer 111 with the flange pipe 201. The bundling steel wires 9 should be wound 3 - 4 circles in a closed manner at the joint of the flange pipe 201 and fixed by welding, and then wound equidistantly on the first cord pressure-bearing layer 102, the second cord pressure-bearing layer 104, the third cord pressure-bearing layer 108, and the fourth cord pressure-bearing layer 111 and the flange pipe 201, and the winding processes at both ends are the same.

[0156] Step Seven:

[0157] Subsequently, cover the floating layer 110 on the outside of the second outer rubber layer 109, then wind the fourth cord pressure-bearing layer 111 around the floating layer 110, and finally cover the third outer rubber layer 112 on the outside of the fourth cord pressure-bearing layer 111. The third outer rubber layer 112 extends to cover the entire hose and stops at the position of the neck of the flange pipe 201.

[0158] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily essential for implementing the present invention.

[0159] Those skilled in the art can understand that the modules in the offshore oil transportation hose in the implementation scenario can be distributed in the offshore oil transportation hose in the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed and located in one or more offshore oil transportation hoses different from this implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0160] The above-disclosed are only specific implementation scenarios of the present novelty. However, the present novelty is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present novelty.

Claims

1. An offshore oil transfer hose with a double protection skeleton, which includes a pipe body (1), a flange connecting member (2) arranged inside the pipe body (1), a sealing assembly (3) installed between the single bodies of the flange connecting member (2), a third sealing ring (4) located inside the sealing assembly (3), fastening bolts (5) for connecting and fixing the single bodies of the flange connecting member (2), and an anti-pulling-off ring (6) for positioning the pipe body (1). The characteristics are as follows: The pipe body (1) includes a first oil-resistant inner rubber layer (101), a first cord pressure-bearing layer (102) arranged outside the first oil-resistant inner rubber layer (101), and a steel bar skeleton reinforcement layer (103) arranged outside the first cord pressure-bearing layer (102). A steel wire reinforcement layer (113) for increasing the installation strength penetrates through the inside of the steel bar skeleton reinforcement layer (103). A second cord pressure-bearing layer (104) is arranged outside the steel bar skeleton reinforcement layer (103). A first oil-resistant outer rubber layer (105) is installed outside the second cord pressure-bearing layer (104), and a spacer layer (106) is arranged outside the first oil-resistant outer rubber layer (105). The flange connecting member (2) includes a flange pipe (201), a compensation ring (202) arranged inside the flange pipe (201), and a first sealing ring (203) arranged outside the compensation ring (202) and clamped inside the flange pipe (201) for sealing. The single bodies of the flange connecting member (2) are connected by fastening bolts (5), and an anti-pulling-off ring (6) is arranged outside the fastening bolts (5). The sealing assembly (3) includes a limit ring (301), a limit block (303) arranged inside the limit ring (301), and a second sealing ring (302) installed outside the limit ring (301). The inner end of the limit block (303) is in contact with the third sealing ring (4). An auxiliary skeleton sleeve (7) is installed outside the flange connecting member (2) and is arranged at one of the left and right ends of the pipe body (1). An oil leakage observation system (8) is installed inside the auxiliary skeleton sleeve (7), and the inside of the auxiliary skeleton sleeve (7) is communicated with the inside of the spacer layer (106). Fastening bolts (5) for connecting and fixing the flange pipes (201) are arranged at equal angles between the single bodies of the flange pipes (201). A groove-like structure is formed inside the flange pipes (201) for installing the sealing assembly (3) and the third sealing ring (4). The longitudinal section of the groove-like structure for installing the third sealing ring (4) is trapezoidal. The longitudinal section of the compensation ring (202) is trapezoidal. One end of the compensation ring (202) is fixedly welded to the flange pipe (201), and the outside of the compensation ring (202) is in contact with the other flange pipe (201). The limiting ring (301) is elastically connected to the flange pipe (201) through a spring, and the longitudinal section of the limiting ring (301) is trapezoidal. A groove-like structure is formed on the inner side of the limiting ring (301), and the longitudinal section of the groove-like structure is trapezoidal. A limiting block (303) with a longitudinal section in the shape of "T" is arranged in the groove-like structure, and the limiting block (303) is slidably connected to both the flange pipe (201) and the limiting ring (301).

2. The offshore oil transfer hose with a double protection framework according to claim 1, characterized in that, The pipe body (1) further includes a second inner rubber layer (107) arranged outside the spacer layer (106), and a third cord bearing layer (108) is installed outside the second inner rubber layer (107). A second outer rubber layer (109) is installed outside the third cord bearing layer (108), and a floating layer (110) for floating is arranged outside the second outer rubber layer (109). A fourth cord bearing layer (111) is arranged outside the floating layer (110), and a third outer rubber layer (112) is arranged outside the fourth cord bearing layer (111).

3. The marine oil transportation hose with a double protection skeleton according to claim 1, characterized in that, The limiting blocks (303) are arranged at equal angles with respect to the center of the third sealing ring (4).

4. The offshore oil transfer hose with a double protection skeleton as claimed in claim 1, wherein, The anti-pulling-off rings (6) are uniformly arranged outside the flange pipe (201), and the anti-pulling-off rings (6) are wrapped by the pipe body (1).

5. The marine oil transportation hose with a double protection skeleton as claimed in claim 1, characterized in that, The oil leakage observation system (8) includes a mechanical oil leakage detection device (801), an additionally installed electronic tuning fork detection sensor (802), a wireless transmission and reception module (803), an industrial control computer (804), a PLC peripheral circuit (805), and a cable (806) for connection.

6. The marine oil transportation hose with a double protection skeleton as described in claim 1, characterized in that, The winding step between the first oil-resistant inner rubber layer (101) and the flange pipe (201) includes: taking the pipe body (1) with an inner diameter of 400 mm as an example; Step 1: Select a pipe core with an inner diameter of 400 mm, grind and remove rust from it, and then apply a release agent. Step 2: Install the flange pipes (201) at both ends of the pipe core and fix them on the pipe core. Step 3: Wind the first oil-resistant inner rubber layer (101) with a thickness of 1 mm and a width of 100 mm on the flange pipe (201) and the pipe core, and the winding thickness is 4 mm.

7. The marine oil transportation hose with a double protection framework according to claim 2, characterized in that, The raw material composition and preparation method of the pipe body (1) include: The first oil-resistant inner rubber layer (101) is composed of the following materials: oil-resistant nitrile rubber, with a weight ratio of 50:70; the filler reinforcing agent is carbon black N330, with a weight ratio of 10:20; the plasticizer is dioctyl phthalate, with a weight ratio of 5:10; the activator is magnesium oxide, with a weight ratio of 1:3; the anti-aging agent has a weight ratio of 0.5:1; The first cord bearing layer (102), the second cord bearing layer (104), the third cord bearing layer (108), and the fourth cord bearing layer (111) are composed of the following materials: polyester or nylon friction tape; The steel bar skeleton reinforcement layer (103) is composed of the following materials: nitrile and chloroprene rubber, with a weight ratio of 20:30; the reinforcing agent is carbon black N774, with a weight ratio of 5:10; the plasticizer is iron oxide red and phenolic resin, with a weight ratio of 0.5:2; cut into narrow rubber strips and filled in the gaps between the spiral steel wires; The first oil-resistant outer rubber layer (105) and the third outer rubber layer (112) are composed of the following materials: cis-butadiene, chloroprene, styrene-butadiene rubber, with a weight ratio of 30:40; the reinforcing agent is carbon black N330, with a weight ratio of 10:

15. The first oil-resistant outer rubber layer (105) and the third outer rubber layer (112) should have resistance to aging, wear, light, and salt spray; The floating layer (110) is an HDPE board with a melting point of 130 °C and a relative density of 0.941 - 0.960; Step 1: Wind the first cord pressure-bearing layer (102) around the outside of the first oil-resistant inner rubber layer (101). The winding layer number is an even number, and the winding angle is 45 - 55°. Wind the outer end of the first cord pressure-bearing layer (102) to the outside of the anti-pull-out ring (6) provided on the outside of the flange pipe (201) for winding and positioning with the anti-pull-out ring (6). And at the interface between the first cord pressure-bearing layer (102) and the flange pipe (201), there is a binding steel wire wound in a spiral. And this binding steel wire (9) should meet the quality requirements specified in BS3592:1, with a minimum tensile strength of 650 N / mm². The binding steel wire (9) should be wound in a closed loop for 3 - 4 turns at the joint of the flange pipe (201) and fixed by welding, and then wound at equal intervals on the first cord pressure-bearing layer (102) and the flange pipe (201). The winding process of the two ends' joints is the same; Step 2: Wind the steel bar skeleton reinforcement layer (103) to cover the outside of the first cord pressure-bearing layer (102), and there is a steel wire reinforcement layer (113) wound in a spiral on the inner side of the steel bar skeleton reinforcement layer (103); Step 3: Wind the second cord pressure-bearing layer (104) around the outside of the steel bar skeleton reinforcement layer (103). The winding directions of the adjacent cord layers of the reinforcement layer are opposite, and the other winding methods are the same. Winding and positioning are carried out with the anti-pull-out ring (6); Step 4: Cover the first oil-resistant outer rubber layer (105) on the outside of the second cord pressure-bearing layer (104), and extend to cover the whole hose and stop at the neck position of the flange pipe (201); Step 5: Set a spacer layer (106) on the outside of the first oil-resistant outer rubber layer (105); Step 6: Repeat Steps 2 to 4 for winding, so that the second inner rubber layer (107) covers the outside of the spacer layer (106), the third cord pressure-bearing layer (108) is wound around the outside of the second inner rubber layer (107), and the second outer rubber layer (109) covers the outside of the third cord pressure-bearing layer (108). And at the connection between the first cord pressure-bearing layer (102), the second cord pressure-bearing layer (104), the third cord pressure-bearing layer (108), and the fourth cord pressure-bearing layer (111) and the flange pipe (201), there is a binding steel wire (9) provided. The binding steel wire (9) should be wound in a closed loop for 3 - 4 turns at the joint of the flange pipe (201) and fixed by welding, and then wound at equal intervals on the first cord pressure-bearing layer (102), the second cord pressure-bearing layer (104), the third cord pressure-bearing layer (108), and the fourth cord pressure-bearing layer (111) and the flange pipe (201). The winding process of the two ends' joints is the same; Step 7: Subsequently, the floating layer (110) is covered on the outside of the second outer rubber layer (109), then the fourth cord pressure-bearing layer (111) is wound around the floating layer (110), and finally the third outer rubber layer (112) is covered on the outside of the fourth cord pressure-bearing layer (111). The third outer rubber layer (112) extends to cover the entire hose and terminates at the neck position of the flange pipe (201).

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