Military oil transfer composite hose and method of production thereof

Abstract

The application discloses a military oil conveying composite hose and a production method thereof, and relates to the technical field of pipelines.The military oil conveying composite hose comprises a medium conveying layer, a pressure bearing reinforcing layer and an outer protective layer.The pressure bearing reinforcing layer comprises a first braided layer and a second braided layer, the outer protective layer is arranged outside the first braided layer and is bonded with the first braided layer, the first braided layer is arranged outside the second braided layer and is connected with the second braided layer, the second braided layer is arranged outside the medium conveying layer and is bonded with the medium conveying layer, the first braided layer and the second braided layer have different extension expansion rates, and the first braided layer and the second braided layer can relatively slide when the military oil conveying composite hose is folded or wound.The military oil conveying composite hose can effectively improve the pressure bearing capacity, is not prone to damage, has high softness, is convenient to fold or wind and store, is durable and reliable, and has a long service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline, in particular to a military oil conveying composite hose and a production method thereof. BACKGROUND

[0002] At present, the oil conveying hose is an important equipment for long-distance oil conveying, which replaces the existing hard steel or aluminum alloy pipeline and is mainly used for conveying bulk oil in the army. The oil conveying hose has the characteristics of convenient transportation and fast deployment. However, the current oil conveying hose has low pressure-bearing capacity and is prone to damage under high-pressure oil conveying or in harsh environmental conditions. In addition, the oil conveying hose has low softness, which is not conducive to folding or winding storage, and has a short service life.

[0003] Therefore, it is particularly important to design a military oil conveying composite hose with high pressure-bearing capacity and high softness, especially in the production of pipelines. SUMMARY

[0004] The present application relates to the technical field of pipeline, in particular to a military oil conveying composite hose and a production method thereof.

[0005] The present application relates to the technical field of pipeline, in particular to a military oil conveying composite hose and a production method thereof.

[0006] The present application is realized by adopting the following technical solutions.

[0007] A military oil conveying composite hose comprises a medium conveying layer, a pressure-bearing reinforcing layer and an outer protective layer. The pressure-bearing reinforcing layer comprises a first braided layer and a second braided layer. The outer protective layer is arranged outside the first braided layer and is bonded to the first braided layer. The first braided layer is arranged outside the second braided layer and is connected to the second braided layer. The second braided layer is arranged outside the medium conveying layer and is bonded to the medium conveying layer. The first braided layer and the second braided layer have different extension expansion rates. The first braided layer and the second braided layer can relatively slide when the military oil conveying composite hose is folded or wound.

[0008] Optionally, the sliding ratio between the first braided layer and the second braided layer ranges from 0.5% to 10%.

[0009] Optionally, the first braided layer comprises a weft thread and a plurality of warp threads. The plurality of warp threads are arranged in parallel and at intervals and are perpendicular to the weft thread. Adjacent two warp threads form a braided gap. The weft thread is sequentially arranged in the plurality of braided gaps to fix the relative positions of the plurality of warp threads.

[0010] Optionally, the first braided layer is bonded to the second braided layer, or the first braided layer is connected to the second braided layer through a jumper structure.

[0011] Optionally, the first braided layer comprises a first hierarchical structure and a second hierarchical structure, the first hierarchical structure is connected to the second hierarchical structure through a jumper structure, the second braided layer comprises a third hierarchical structure and a fourth hierarchical structure, the third hierarchical structure is connected to the fourth hierarchical structure through a jumper structure, the first hierarchical structure, the second hierarchical structure, the third hierarchical structure and the fourth hierarchical structure are arranged in sequence, and the second hierarchical structure is bonded to the third hierarchical structure.

[0012] A production method of a military oil conveying composite hose, for producing the military oil conveying composite hose, the production method of the military oil conveying composite hose comprising: extruding a medium conveying layer and an outer protective layer by using an extruder; braiding a first braided layer and a second braided layer by using a circular braiding machine; and compounding the outer protective layer, the first braided layer, the second braided layer and the medium conveying layer to obtain the military oil conveying composite hose.

[0013] Optionally, in the step of braiding the first braided layer and the second braided layer by using the circular braiding machine, the first braided layer and the second braided layer are arranged separately; and the step of compounding the outer protective layer, the first braided layer, the second braided layer and the medium conveying layer to obtain the military oil conveying composite hose comprises: threading the outer protective layer into the first braided layer, and introducing hot steam into the outer protective layer to make the outer protective layer expand and be hot-melt bonded to the first braided layer; turning over the outer protective layer and the first braided layer to make the outer protective layer surround the first braided layer; threading the second braided layer into the first braided layer, and threading the medium conveying layer into the second braided layer, and introducing hot steam into the medium conveying layer to make the medium conveying layer expand and be hot-melt bonded to the first braided layer through the second braided layer.

[0014] Optionally, in the step of threading the outer protective layer into the first braided layer, and introducing hot steam into the outer protective layer to make the outer protective layer expand and be hot-melt bonded to the first braided layer, the hot steam is introduced into both ends of the outer protective layer at the same time, the pressure range of the introduced hot steam is 0.1 MPa to 0.5 MPa, and the time range of the introduced hot steam is 10 minutes to 50 minutes.

[0015] Optionally, the outer surfaces of the outer protective layer and the medium conveying layer are provided with an adhesive.

[0016] Optionally, in the step of forming the first braided layer and the second braided layer by braiding with the circular braiding machine, the first braided layer and the second braided layer are connected through the jumper structure, and the second braided layer is arranged outside the first braided layer; the step of compounding the outer protective layer, the first braided layer, the second braided layer and the medium conveying layer to obtain the military oil conveying composite hose comprises: threading the outer protective layer into the first braided layer, and passing hot steam into the outer protective layer to make the outer protective layer expand and be hot melt bonded with the first braided layer; turning over the outer protective layer, the first braided layer and the second braided layer to make the outer protective layer arranged outside the first braided layer and the first braided layer arranged outside the second braided layer; and threading the medium conveying layer into the second braided layer, and passing hot steam into the medium conveying layer to make the medium conveying layer expand and be hot melt bonded with the second braided layer.

[0017] Optionally, after the step of compounding the outer protective layer, the first braided layer, the second braided layer and the medium conveying layer to obtain the military oil conveying composite hose, the production method of the military oil conveying composite hose further comprises: performing pressure test on the military oil conveying composite hose, and performing winding packaging or folding packaging after the test is qualified.

[0018] The military oil conveying composite hose and the production method thereof provided by the application have the following beneficial effects:

[0019] The military oil conveying composite hose provided by the application comprises a pressure bearing reinforcing layer, an outer protective layer, a first braided layer, a second braided layer and a medium conveying layer, the outer protective layer is arranged outside the first braided layer and is bonded with the first braided layer, the first braided layer is arranged outside the second braided layer and is connected with the second braided layer, the second braided layer is arranged outside the medium conveying layer and is bonded with the medium conveying layer, the first braided layer and the second braided layer have different extension expansion rates, and the first braided layer and the second braided layer can relatively slide when the military oil conveying composite hose is folded or wound. Compared with the prior art, the military oil conveying composite hose provided by the application can effectively improve the pressure bearing capacity, is not easy to be damaged, has high softness, is convenient to fold or wind for storage, is durable and reliable, and has long service life.

[0020] The production method of the military oil conveying composite hose provided by the application is used for producing the military oil conveying composite hose, the military oil conveying composite hose produced by the production method has high pressure bearing capacity, is not easy to be damaged, has high softness, is convenient to fold or wind for storage, is durable and reliable, and has long service life. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 A sectional view of the military oil conveying composite hose provided by the first embodiment of the present application;

[0023] Figure 2 A sectional view of the pressure-bearing reinforcing layer in the military oil conveying composite hose provided by the first embodiment of the present application;

[0024] Figure 3 A sectional view of the pressure-bearing reinforcing layer in the military oil conveying composite hose provided by the first embodiment of the present application; Figure 2 A partial sectional view of the first braided layer;

[0025] Figure 4 A step block diagram of the production method of the military oil conveying composite hose provided by the first embodiment of the present application;

[0026] Figure 5 A sectional view of the pressure-bearing reinforcing layer in the military oil conveying composite hose provided by the second embodiment of the present application;

[0027] Figure 6 A sectional view of the pressure-bearing reinforcing layer in the military oil conveying composite hose provided by the third embodiment of the present application.

[0028] Figure legend: 100-military oil conveying composite hose; 110-medium conveying layer; 120-pressure-bearing reinforcing layer; 121-first braided layer; 122-second braided layer; 123-weft; 124-warp; 125-first weft; 126-second weft; 127-braided gap; 128-first hierarchical structure; 129-second hierarchical structure; 130-first silk thread; 131-third hierarchical structure; 132-fourth hierarchical structure; 133-second silk thread; 134-third silk thread; 140-outer protective layer. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] The following detailed description of embodiments of the application in the drawings is not intended to limit the scope of the application as claimed, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments that would be obvious to one of ordinary skill in the art based upon the present application are within the scope of the application.

[0031] It should be noted that similar reference numbers and characters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0032] In the description of the application, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0033] In the description of the application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "mounted", and "connected" should be broadly understood, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0034] Some embodiments of the application will be described in detail below with reference to the accompanying drawings. The features in the following embodiments can be combined with each other without conflict.

[0035] First embodiment

[0036] Please refer to Figure 1 The embodiments of the application provide a military oil conveying composite hose 100 for conveying oil. It can effectively improve the pressure capacity, is not easy to break, has high softness, is convenient to fold or wind for storage, is durable and reliable, and has long service life.

[0037] The military oil conveying composite hose 100 comprises a medium conveying layer 110, a pressure bearing reinforcing layer 120 and an outer protective layer 140, wherein the medium conveying layer 110, the pressure bearing reinforcing layer 120 and the outer protective layer 140 are all in a tubular shape, and the outer protective layer 140, the pressure bearing reinforcing layer 120 and the medium conveying layer 110 are sequentially arranged from outside to inside. The outer protective layer 140 is used for external protection to prevent the military oil conveying composite hose 100 from being corroded or damaged; the pressure bearing reinforcing layer 120 is used for the strength and pressure bearing capacity of the military oil conveying composite hose 100, and improves the softness of the military oil conveying composite hose 100, prolonging the service life of the military oil conveying composite hose 100; the medium conveying layer 110 is used for oil flow. Specifically, the multi-layer structure design of the military oil conveying composite hose 100 can bear pressure through the remaining layer structure when one or two layers of the structure are damaged, to ensure the oil conveying function, avoid the complete failure of the conveying pipeline, and be safe and reliable, and the multi-layer structure design can reduce the fiber weaving density of a single layer structure, improve the softness of the pipe material, and facilitate folding or winding storage.

[0038] Please refer to Figure 2 The pressure bearing reinforcing layer 120 comprises a first woven layer 121 and a second woven layer 122. The outer protective layer 140 is arranged outside the first woven layer 121 and is bonded with the first woven layer 121. The first woven layer 121 is arranged outside the second woven layer 122 and is connected with the second woven layer 122. The second woven layer 122 is arranged outside the medium conveying layer 110 and is bonded with the medium conveying layer 110. Specifically, the first woven layer 121 and the second woven layer 122 have different extension expansion rates, and the first woven layer 121 and the second woven layer 122 can relatively slide when the military oil conveying composite hose 100 is folded or wound, to release the extension rate of the overall pipe material, further improve the softness of the pipe material, and prolong the service life of the military oil conveying composite hose 100.

[0039] Further, the first woven layer 121 and the second woven layer 122 have small thickness, and the diameter of the first woven layer 121 is greater than that of the second woven layer 122. Since the external stress of the first woven layer 121 and the second woven layer 122 is small, and the weaving structure is relatively sparse, there is a certain sliding space between the first woven layer 121 and the second woven layer 122, so that the first woven layer 121 and the second woven layer 122 can relatively slide, thereby effectively relieving the internal pressure and external tension caused by folding or winding, reducing the pipe material life loss caused by folding or winding, and further effectively prolonging the service life of the military oil conveying composite hose 100.

[0040] It should be noted that the slip ratio between the first braided layer 121 and the second braided layer 122 ranges from 0.5% to 10%, that is, the ratio of the distance of the first braided layer 121 slipping relative to the second braided layer 122 to the circumference of the second braided layer 122. A reasonable slip ratio between the first braided layer 121 and the second braided layer 122 can ensure the strength of the military oil conveying composite hose 100 while maximizing its softness, thereby prolonging the service life of the military oil conveying composite hose 100. In this embodiment, the slip ratio between the first braided layer 121 and the second braided layer 122 is 5%, but it is not limited thereto. In other embodiments, the slip ratio between the first braided layer 121 and the second braided layer 122 can be 0.5% or 10%, and the slip ratio between the first braided layer 121 and the second braided layer 122 is not specifically limited.

[0041] Please refer to Figure 3 The first braided layer 121 includes a weft thread 123 and a plurality of warp threads 124. The plurality of warp threads 124 are arranged in parallel and at intervals, and are perpendicular to the weft thread 123, so as to facilitate weaving, improve the strength of the first braided layer 121, and improve the aesthetic appearance. Adjacent two warp threads 124 form a weaving gap 127, and the weaving gap 127 is used for the weft thread 123 to pass through. The weft thread 123 is sequentially arranged in a plurality of weaving gaps 127 to fix the relative positions of the plurality of warp threads 124 and prevent relative displacement between the plurality of warp threads 124.

[0042] The weft thread 123 includes a first weft thread 125 and a second weft thread 126. The first weft thread 125 and the second weft thread 126 are arranged alternately, and the warp thread 124 is arranged between the first weft thread 125 and the second weft thread 126, and the first weft thread 125 and the second weft thread 126 are used to clamp the warp thread 124. The first weft thread 125 and the second weft thread 126 act together to simultaneously fix the relative positions of the plurality of warp threads 124.

[0043] Specifically, in the process of interweaving the weft thread 123 and the plurality of warp threads 124, first, the first weft thread 125 passes over the first warp thread 124 from above and extends into the first weaving gap 127, and in this process, the second weft thread 126 passes over the first warp thread 124 from below and extends into the first weaving gap 127, and the first weft thread 125 and the second weft thread 126 are interlaced in the first weaving gap 127; then the first weft thread 125 passes over the second warp thread 124 from below and extends into the second weaving gap 127, and in this process, the second weft thread 126 passes over the second warp thread 124 from above and extends into the second weaving gap 127, and the first weft thread 125 and the second weft thread 126 are interlaced in the second weaving gap 127; and so on, the first weft thread 125 and the second weft thread 126 fix the plurality of warp threads 124.

[0044] It is worth noting that the number of weft lines 123 is multiple, the multiple weft lines 123 are arranged in parallel and are attached, and the arrangement direction of the multiple weft lines 123 is the same as the length direction of the warp lines 124. The multiple weft lines 123 are densely arranged to completely cover the multiple warp lines 124, so as to weave the first woven layer 121.

[0045] In this embodiment, the weft lines 123 and the warp lines 124 are both made of aramid fiber material to improve the stability of the first woven layer 121. Specifically, since the elongation of aramid fiber is less than 5% (significantly lower than the elongation of polyester fiber of 14%), the consistency of the stress of aramid fiber has a greater impact on its use effect, so the pressure-resistant reinforcing layer 120 is designed as a double-layer structure (the first woven layer 121 and the second woven layer 122), which can improve the consistency of the aramid fiber material, thereby preventing the instability of the pipe during production, ensuring that the pressure-bearing capacity of different parts of the military oil conveying composite hose 100 does not fluctuate, and further improving the quality stability and durability of the military oil conveying composite hose 100.

[0046] It should be noted that the specific structure of the second woven layer 122 is the same as that of the first woven layer 121, which will not be described here.

[0047] In this embodiment, the first woven layer 121 and the second woven layer 122 are bonded to prevent the first woven layer 121 and the second woven layer 122 from separating. Specifically, the first woven layer 121 and the second woven layer 122 are bonded by an adhesive, the adhesive has a certain elasticity, so that the first woven layer 121 and the second woven layer 122 can slide relative to each other, and the adhesive can limit the sliding ratio of the first woven layer 121 and the second woven layer 122.

[0048] Further, the thickness of the first woven layer 121 and the second woven layer 122 is in the range of 1-3 mm, and the first woven layer 121 and the second woven layer 122 can use warp lines 124 and weft lines 123 of different densities according to the use pressure of the military oil conveying composite hose 100. Specifically, the density of the warp line 124 is in the range of 2000D (denier) to 21000D, and the density of the warp line 124 is in the range of 3000D to 60000D.

[0049] It is worth noting that the medium conveying layer 110 and the outer protective layer 140 are both made of polyurethane elastomer material, and the gum content in them is less than 5 mg / 100 mL (milligrams per milliliter). The polyurethane elastomer material with low gum content has good oil resistance, wear resistance, corrosion resistance and puncture resistance, which can effectively improve the durability of the military oil conveying composite hose 100 and prolong its service life.

[0050] In the embodiment, the wall thickness of the outer protective layer 140 and the medium conveying layer 110 ranges from 0.5 mm to 2 mm, and the wall thickness of the outer protective layer 140 is greater than that of the medium conveying layer 110, so as to improve the protection capability of the outer protective layer 140 and avoid damage of the military oil conveying composite hose 100 under harsh external environment conditions.

[0051] Please refer to Figure 4 The embodiment of the present application also provides a production method of the military oil conveying composite hose, which is used for producing the military oil conveying composite hose 100 and comprises the following steps.

[0052] In step S110, the medium conveying layer 110 and the outer protective layer 140 are extruded by using the extruder.

[0053] It should be noted that in step S110, the polyurethane elastomer material is input into the extruder, and different specifications of polyurethane elastomer tubes are extruded by using the extruder, wherein one specification of the polyurethane elastomer tube is the medium conveying layer 110, and the other specification of the polyurethane elastomer tube is the outer protective layer 140, the wall thickness of the outer protective layer 140 is greater than that of the medium conveying layer 110, and the hardness of the outer protective layer 140 is greater than that of the medium conveying layer 110.

[0054] In the embodiment, in the process of extruding the medium conveying layer 110 by using the extruder, the adhesive is simultaneously input into the extruder, so as to co-extrude the medium conveying layer 110 and the adhesive, and the adhesive is uniformly arranged on the outer surface of the medium conveying layer 110, so as to facilitate subsequent hot melt bonding. Specifically, the thickness of the adhesive ranges from 0.1 mm to 1 mm, and reasonable adhesive thickness can save material cost as much as possible while ensuring bonding reliability. However, it is not limited thereto, and in other embodiments, the adhesive can be manually coated on the outer surface of the medium conveying layer 110 after the medium conveying layer 110 is extruded, and subsequent hot melt bonding can also be achieved, and the arrangement manner of the adhesive is not specifically limited.

[0055] Similarly, in the process of extruding the outer protective layer 140 by using the extruder, the adhesive is simultaneously input into the extruder, so as to co-extrude the outer protective layer 140 and the adhesive, and the adhesive is uniformly arranged on the outer surface of the outer protective layer 140, so as to facilitate subsequent hot melt bonding. Specifically, the thickness of the adhesive ranges from 0.1 mm to 1 mm, and reasonable adhesive thickness can save material cost as much as possible while ensuring bonding reliability. However, it is not limited thereto, and in other embodiments, the adhesive can be manually coated on the outer surface of the outer protective layer 140 after the outer protective layer 140 is extruded, and subsequent hot melt bonding can also be achieved, and the arrangement manner of the adhesive is not specifically limited.

[0056] Step S120: forming the first woven layer 121 and the second woven layer 122 by using a circular weaving machine.

[0057] It should be noted that in step S120, the first woven layer 121 and the second woven layer 122 are separately arranged, and different specifications of aramid fiber tape blanks are woven by using a circular weaving machine, wherein one specification of aramid fiber tape blank is the first woven layer 121, and the other specification of aramid fiber tape blank is the second woven layer 122, the weaving density of the first woven layer 121 is less than that of the second woven layer 122, and the extension expansion rate of the first woven layer 121 is greater than that of the second woven layer 122.

[0058] Step S130: compounding the outer protective layer 140, the first woven layer 121, the second woven layer 122, and the medium conveying layer 110 to obtain the military oil conveying composite hose 100.

[0059] Specifically, step S130 includes three steps, which are:

[0060] Step S131: passing the outer protective layer 140 into the first woven layer 121, and passing hot steam into the outer protective layer 140 to make the outer protective layer 140 expand and be heat-fused and adhered with the first woven layer 121.

[0061] It should be noted that in step S131, the outer protective layer 140 is first passed into the tube inner cavity of the first woven layer 121, and then hot steam is simultaneously passed into both ends of the outer protective layer 140, so that the hot steam is gathered in the outer protective layer 140 and seeps outwards through the outer protective layer 140 and the first woven layer 121. In this process, the outer protective layer 140 expands outwards under the action of thermal stress and gas pressure, and is heat-fused and adhered with the first woven layer 121 through the adhesive.

[0062] Further, the gas pressure range of the hot steam is 0.1 MPa to 0.5 MPa, and the time range of the hot steam is 10 minutes to 50 minutes. Reasonable gas pressure and time of the hot steam can ensure the stability of the adhesion between the outer protective layer 140 and the first woven layer 121, thereby improving the service life of the military oil conveying composite hose 100.

[0063] Step S132: turning over the outer protective layer 140 and the first woven layer 121 to make the outer protective layer 140 surround the first woven layer 121.

[0064] It should be noted that in step S132, the outer protective layer 140 and the first woven layer 121 are turned over inside and outside by using a special turning over device, so as to turn the first woven layer 121 originally located on the outer layer to the inner layer, and turn the outer protective layer 140 originally located on the inner layer to the outer layer.

[0065] Step S133: pass the second braided layer 122 into the first braided layer 121, pass the medium conveying layer 110 into the second braided layer 122, and pass hot steam into the medium conveying layer 110 to make the medium conveying layer 110 expand and be hot melt bonded with the second braided layer 122 and the first braided layer 121.

[0066] It should be noted that in step S133, the second braided layer 122 is first passed into the tube inner cavity of the first braided layer 121, then the medium conveying layer 110 is passed into the tube inner cavity of the second braided layer 122, and then hot steam is simultaneously passed into both ends of the medium conveying layer 110 to make the hot steam gather in the medium conveying layer 110 and then seep outwards through the second braided layer 122, the first braided layer 121 and the outer protective layer 140. In this process, the medium conveying layer 110 expands outwards under the action of thermal stress and air pressure and is hot melt bonded with the second braided layer 122 through the adhesive, and at the same time, the adhesive arranged on the outer surface of the medium conveying layer 110 seeps into the second braided layer 122 and the first braided layer 121 to realize the bonding of the second braided layer 122 and the first braided layer 121, so that the relative sliding between the second braided layer 122 and the first braided layer 121 can occur.

[0067] Step S140: pressure test the military oil conveying composite hose 100, and after the test is qualified, perform winding packaging or folding packaging.

[0068] It should be noted that in step S140, a water pump is used to pass water with a preset pressure into the military oil conveying composite hose 100 to test the pressure bearing capacity of the military oil conveying composite hose 100. If the test is qualified, the packaging is prepared for the military oil conveying composite hose 100 to be shipped out, and if the test is unqualified, the military oil conveying composite hose 100 is returned to the factory for rework.

[0069] The military oil conveying composite hose 100 provided by the embodiment of the present application, the pressure bearing reinforcing layer 120 comprises a first braided layer 121 and a second braided layer 122, the outer protective layer 140 is arranged outside the first braided layer 121 and is bonded with the first braided layer 121, the first braided layer 121 is arranged outside the second braided layer 122 and is connected with the second braided layer 122, the second braided layer 122 is arranged outside the medium conveying layer 110 and is bonded with the medium conveying layer 110, the first braided layer 121 and the second braided layer 122 have different extension expansion rates, and the first braided layer 121 and the second braided layer 122 can relatively slide when the military oil conveying composite hose 100 is folded or wound. Compared with the prior art, the military oil conveying composite hose 100 provided by the present application can effectively improve the pressure bearing capacity and is not easy to be damaged, has high softness, is convenient to fold or wind for storage, is durable and reliable, and has long service life, because the medium conveying layer 110, the pressure bearing reinforcing layer 120 and the outer protective layer 140 are sequentially arranged, and the first braided layer 121 and the second braided layer 122 can relatively slide. The production method of the military oil conveying composite hose is simple, and the military oil conveying composite hose 100 with good stability and safety is produced.

[0070] Second embodiment

[0071] Please refer to Figure 5 The embodiment of the present application provides a military oil conveying composite hose 100, compared with the first embodiment, the difference of the embodiment is that the structure of the first braided layer 121 and the second braided layer 122 is different.

[0072] In the embodiment, the first braided layer 121 comprises a first hierarchical structure 128 and a second hierarchical structure 129, the first hierarchical structure 128 and the second hierarchical structure 129 are connected through a jumper structure, the jumper structure is a first wire 130 reciprocally arranged between the first hierarchical structure 128 and the second hierarchical structure 129, the first hierarchical structure 128 is connected with the second hierarchical structure 129 through the first wire 130, because the first wire 130 has a certain flexibility, the first hierarchical structure 128 and the second hierarchical structure 129 can relatively slide, and the first wire 130 can limit the sliding proportion of the first hierarchical structure 128 and the second hierarchical structure 129.

[0073] Similarly, the second braided layer 122 comprises a third hierarchical structure 131 and a fourth hierarchical structure 132, the third hierarchical structure 131 and the fourth hierarchical structure 132 are connected through a jumper structure, that is, a second wire 133 reciprocally arranged between the third hierarchical structure 131 and the fourth hierarchical structure 132, the third hierarchical structure 131 is connected with the fourth hierarchical structure 132 through the second wire 133, since the second wire 133 has a certain flexibility, the third hierarchical structure 131 and the fourth hierarchical structure 132 can relatively slide, and the second wire 133 can limit the sliding ratio of the third hierarchical structure 131 and the fourth hierarchical structure 132.

[0074] It is worth noting that the first hierarchical structure 128, the second hierarchical structure 129, the third hierarchical structure 131 and the fourth hierarchical structure 132 are sequentially arranged, the second hierarchical structure 129 is bonded with the third hierarchical structure 131 through an adhesive, so that the second hierarchical structure 129 and the third hierarchical structure 131 can relatively slide. In this way, the pressure enhancement layer 120 has four layers of braided structures, and the relative sliding between any two adjacent braided structures can further reduce the loss of pipe life caused by folding or winding, and prolong the service life of the military oil conveying composite hose 100.

[0075] The beneficial effects of the military oil conveying composite hose 100 provided by the embodiment of the present application are the same as those of the first embodiment, and will not be repeated here.

[0076] Third embodiment

[0077] Please refer to Figure 6 The embodiment of the present application provides a military oil conveying composite hose 100, compared with the first embodiment, the difference of the embodiment is that the connection mode of the first braided layer 121 and the second braided layer 122 is different.

[0078] In the embodiment, the first braided layer 121 and the second braided layer 122 are connected through a jumper structure, that is, a third wire 134 reciprocally arranged between the first braided layer 121 and the second braided layer 122, the first braided layer 121 is connected with the second braided layer 122 through the third wire 134, since the third wire 134 has a certain flexibility, the first braided layer 121 and the second braided layer 122 can relatively slide, and the third wire 134 can limit the sliding ratio of the first braided layer 121 and the second braided layer 122.

[0079] The embodiment of the present application also provides a production method of a military oil conveying composite hose, compared with the first embodiment, the difference of the embodiment is that the step S120 and the step S130 are different.

[0080] Step S120: forming the first braided layer 121 and the second braided layer 122 by using a circular braiding machine.

[0081] It should be noted that in step S120, the first braided layer 121 and the second braided layer 122 are connected by a jumper structure, the second braided layer 122 is arranged outside the first braided layer 121, and the first braided layer 121 and the second braided layer 122 are braided at the same time by using a circular braiding machine, so that the first braided layer 121 and the second braided layer 122 are connected by the third wire 134. Specifically, the specifications of the first braided layer 121 and the second braided layer 122 are different, the braiding density of the first braided layer 121 is less than that of the second braided layer 122, and the extension expansion rate of the first braided layer 121 is greater than that of the second braided layer 122.

[0082] Step S130: compounding the outer protective layer 140, the first braided layer 121, the second braided layer 122 and the medium conveying layer 110 to obtain the military oil conveying composite hose 100.

[0083] Specifically, step S130 includes three steps, which are:

[0084] Step S131: passing the outer protective layer 140 into the first braided layer 121, and passing hot steam into the outer protective layer 140 to make the outer protective layer 140 expand and be heat-fused and adhered with the first braided layer 121.

[0085] It should be noted that in step S131, the outer protective layer 140 is first passed into the tube inner cavity of the first braided layer 121, and the second braided layer 122 is arranged outside the first braided layer 121, then hot steam is simultaneously passed into both ends of the outer protective layer 140, so that the hot steam is gathered in the outer protective layer 140 and seeps outwards through the outer protective layer 140, the first braided layer 121 and the second braided layer 122, in this process, the outer protective layer 140 expands outwards under the action of thermal stress and air pressure, and is heat-fused and adhered with the first braided layer 121 by the adhesive.

[0086] Step S132: turning over the outer protective layer 140, the first braided layer 121 and the second braided layer 122, so that the outer protective layer 140 is arranged outside the first braided layer 121, and the first braided layer 121 is arranged outside the second braided layer 122.

[0087] It should be noted that in step S132, the outer protective layer 140, the first braided layer 121 and the second braided layer 122 are turned over by a special turning over device, so that the second braided layer 122 originally located on the outer layer is turned over to the inner layer, and the outer protective layer 140 originally located on the inner layer is turned over to the outer layer, and the first braided layer 121 remains unchanged between the second braided layer 122 and the outer protective layer 140.

[0088] Step S133: the medium conveying layer 110 is inserted into the second braided layer 122, and hot steam is introduced into the medium conveying layer 110 to make the medium conveying layer 110 expand and be heat-fused and adhered to the second braided layer 122.

[0089] It should be noted that in step S133, the medium conveying layer 110 is first inserted into the tube inner cavity of the second braided layer 122, and then hot steam is introduced into both ends of the medium conveying layer 110 at the same time, so that the hot steam is gathered in the medium conveying layer 110 and seeps outwards through the second braided layer 122, the first braided layer 121 and the outer protective layer 140 in sequence, in the process, the medium conveying layer 110 expands outwards under the action of thermal stress and air pressure, and is heat-fused and adhered to the second braided layer 122 through the adhesive.

[0090] The military oil conveying composite hose 100 provided by the embodiment of the present application has the same beneficial effects as the first embodiment, and thus will not be described here again.

[0091] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A military fuel transfer composite hose characterized by, The military oil conveying composite hose comprises a medium conveying layer (110), a pressure bearing reinforcing layer (120) and an outer protective layer (140), the pressure bearing reinforcing layer (120) comprises a first braided layer (121) and a second braided layer (122), the first braided layer (121) comprises a first layer structure (128) and a second layer structure (129), the first layer structure (128) and the second layer structure (129) are connected through a jumper structure, the second braided layer (122) comprises a third layer structure (131) and a fourth layer structure (132), the third layer structure (131) and the fourth layer structure (132) are connected through a jumper structure, the first layer structure (128), the second layer structure (129), the third layer structure (131) and the fourth layer structure (132) are sequentially arranged, and the second layer structure (129) and the third layer structure (131) are bonded; the first braided layer (121) and the second braided layer (122) are bonded through an adhesive, the adhesive has a certain elasticity, so that the first braided layer (121) and the second braided layer (122) can relatively slide; the outer protective layer (140) is arranged outside the first braided layer (121) and is bonded with the first braided layer (121), the first braided layer (121) is arranged outside the second braided layer (122) and is connected with the second braided layer (122), the second braided layer (122) is arranged outside the medium conveying layer (110) and is bonded with the medium conveying layer (110), the first braided layer (121) and the second braided layer (122) have different extension expansion rates, the first braided layer (121) and the second braided layer (122) can relatively slide when the military oil conveying composite hose is folded or wound, and the sliding ratio between the first braided layer (121) and the second braided layer (122) ranges from 0.5% to 10%.

2. A military fuel transfer composite hose characterized by, The military oil conveying composite hose comprises a medium conveying layer (110), a pressure bearing reinforcing layer (120) and an outer protective layer (140), the pressure bearing reinforcing layer (120) comprises a first braided layer (121) and a second braided layer (122), the outer protective layer (140) is arranged outside the first braided layer (121) and is bonded with the first braided layer (121), the first braided layer (121) is arranged outside the second braided layer (122) and is connected with the second braided layer (122), the second braided layer (122) is arranged outside the medium conveying layer (110) and is bonded with the medium conveying layer (110), the braiding density of the first braided layer (121) is smaller than that of the second braided layer (122), and the extension expansion rate of the first braided layer (121) is greater than that of the second braided layer (122); the first braided layer (121) and the second braided layer (122) can relatively slide when the military oil conveying composite hose is folded or wound; the first braided layer (121) comprises a weft (123) and a plurality of warps (124), the plurality of warps (124) are arranged in parallel and at intervals and are perpendicular to the weft (123), and a braided gap (127) is formed between adjacent two warps (124), the weft (123) is sequentially arranged in the plurality of braided gaps (127) to fix the relative positions of the plurality of warps (124), and the specific structure of the second braided layer (122) is the same as that of the first braided layer (121); the first braided layer (121) and the second braided layer (122) are bonded by an adhesive, the adhesive has a certain elasticity, so that the first braided layer (121) and the second braided layer (122) can relatively slide, or the first braided layer (121) and the second braided layer (122) are connected by a jumper structure; the sliding ratio between the first braided layer (121) and the second braided layer (122) ranges from 0.5% to 10%.

3. A method of producing a military fuel transfer composite hose, characterized by, The production method of the military oil conveying composite hose as claimed in any one of claims 1 to 2 comprises the following steps: extruding the medium conveying layer (110) and the outer protective layer (140) by using an extruder respectively; braiding the first braided layer (121) and the second braided layer (122) by using a circular braiding machine; and compounding the outer protective layer (140), the first braided layer (121), the second braided layer (122) and the medium conveying layer (110) to obtain the military oil conveying composite hose.

4. The method of producing a military fuel transfer composite hose according to claim 3, wherein In the step of forming the first braided layer (121) and the second braided layer (122) by using a circular braiding machine, the first braided layer (121) and the second braided layer (122) are arranged separately; the step of compounding the outer protective layer (140), the first braided layer (121), the second braided layer (122) and the medium conveying layer (110) to obtain the military oil conveying composite hose comprises the following steps: the outer protective layer (140) is inserted into the first braided layer (121), and hot steam is introduced into the outer protective layer (140) to make the outer protective layer (140) expand and be hot melt bonded with the first braided layer (121); the outer protective layer (140) and the first braided layer (121) are turned over to make the outer protective layer (140) surround the first braided layer (121); the second braided layer (122) is inserted into the first braided layer (121), the medium conveying layer (110) is inserted into the second braided layer (122), and hot steam is introduced into the medium conveying layer (110) to make the medium conveying layer (110) expand and be hot melt bonded with the first braided layer (121) through the second braided layer (122).

5. The method of producing a military fuel transfer composite hose according to claim 4, wherein In the step of inserting the outer protective layer (140) into the first braided layer (121) and introducing hot steam into the outer protective layer (140) to make the outer protective layer (140) expand and be hot melt bonded with the first braided layer (121), hot steam is introduced into both ends of the outer protective layer (140) at the same time, the air pressure of the introduced hot steam ranges from 0.1 MPa to 0.5 MPa, and the time length of the introduced hot steam ranges from 10 minutes to 50 minutes.

6. The method of producing a military fuel transfer composite hose according to claim 3, wherein The outer surfaces of the outer protective layer (140) and the medium conveying layer (110) are provided with adhesive.

7. The method of producing a military fuel transfer composite hose according to claim 3, wherein In the step of weaving the first woven layer (121) and the second woven layer (122) by using the circular loom, the first woven layer (121) and the second woven layer (122) are connected by a jumper structure, and the second woven layer (122) is arranged outside the first woven layer (121); the step of compounding the outer protective layer (140), the first woven layer (121), the second woven layer (122) and the medium conveying layer (110) to obtain the military oil conveying composite hose comprises the following steps: the outer protective layer (140) is inserted into the first woven layer (121), and hot steam is introduced into the outer protective layer (140) to make the outer protective layer (140) expand and be heat-fused and bonded with the first woven layer (121); the outer protective layer (140), the first woven layer (121) and the second woven layer (122) are turned over to make the outer protective layer (140) arranged outside the first woven layer (121) and make the first woven layer (121) arranged outside the second woven layer (122); the medium conveying layer (110) is inserted into the second woven layer (122), and hot steam is introduced into the medium conveying layer (110) to make the medium conveying layer (110) expand and be heat-fused and bonded with the second woven layer (122).

8. The method of producing a military fuel transfer composite hose according to claim 3, wherein After the step of compounding the outer protective layer (140), the first woven layer (121), the second woven layer (122) and the medium conveying layer (110) to obtain the military oil conveying composite hose, the production method of the military oil conveying composite hose further comprises the following steps: pressure testing the military oil conveying composite hose, and winding and packaging or folding and packaging the military oil conveying composite hose after the testing is qualified.

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