Oil pipe with inner rubber and outer plastic and its continuous production composite process

Abstract

The application discloses an inner-layer rubber and outer-layer plastic oil conveying pipe and a continuous production process thereof, and sequentially comprises the following steps: a: using a continuous production device to manufacture a rubber inner layer; b: using the continuous production device to wind a wire outside the rubber inner layer or to weave the wire outside the rubber inner layer; and c: using the continuous production device to extrude a plastic outer layer, so that continuous production is realized, and the product length can be determined according to the requirement of a customer, waste is avoided, energy is saved, cost is saved, energy consumption is small during the production process, waste gas emission is small, tooling is less, cost is lower, and no sewage and waste oil is discharged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil conveying pipe, in particular, to a continuous production process of inner rubber layer and outer plastic layer oil conveying pipe. BACKGROUND

[0002] For gasoline and diesel oil conveying, rubber oil conveying pipe is usually used, and according to different conveying pressure, it is usually divided into low-pressure rubber oil conveying pipe, medium-pressure rubber oil conveying pipe and high-pressure rubber oil conveying pipe. The low-pressure rubber oil conveying pipe and the medium-pressure rubber oil conveying pipe generally have three layers, including an inner rubber layer, a polyester winding layer (or a polyester braiding layer) and an outer rubber layer from inside to outside. The high-pressure rubber oil conveying pipe generally has 3 to 5 layers, which are respectively: the first kind includes an inner rubber layer, a metal wire braiding layer and an outer rubber layer from inside to outside; the second kind includes an inner rubber layer, a polyester winding layer (or a polyester braiding layer), a metal wire braiding layer and an outer rubber layer from inside to outside; and the third kind includes an inner rubber layer, a polyester winding layer (or a polyester braiding layer), a middle rubber layer, a metal wire braiding layer and an outer rubber layer from inside to outside. For the above oil conveying pipe, for the medium and low pressure rubber pipe, the traditional process has the following defects: 1: a core rod needs to be made, the core rod needs to be re-made due to wear and damage, the cost is high, the length of the core rod is fixed, which is relatively limited. For example, if a customer needs a 4*16 meter oil conveying pipe, a 70 meter core rod is selected, and the remaining 6 meters (including material, labor and equipment loss) are wasted. 2: The core rod has a large amount of lubricating oil, a large amount of water is needed for core rod removal in the later stage, and a large amount of sewage is generated, which is high in cost and polluting. 3: The traditional process has many procedures, and the labor cost is high. 4: Steam vulcanization is used, which is high in energy consumption, produces waste gas and pollutes the environment.

[0003] Therefore, the existing Chinese invention patent application No. 202010029287.6, patent name: a kind of rubber texture plastic hose and its production method, discloses that the above-mentioned plastic particles are put into extrusion pipe machine, and the inner layer is obtained by extrusion; the polyester woven thread is wound outside the inner layer by using winding machine; the outer layer is extruded by extrusion pipe machine, and the plastic hose is obtained; it is disclosed that the pipe made of plastic is used in the inner and outer layers, which is mainly used for agricultural irrigation and industrial transportation, but the plastic has poor oil resistance and poor antistatic performance, although anti-static agent is added in pvc now, but with the passage of time, the anti-static agent will eventually fail, there is a security risk, which will not be accepted by customers in the field of gasoline, diesel oil and other transportation. SUMMARY

[0004] The present application aims to solve the problems of the prior art, at least to some extent, to provide an inner rubber outer plastic oil pipeline and its continuous production process, to simplify the process, save labor, protect the environment and achieve energy saving and emission reduction.

[0005] To solve the above technical problems, the technical scheme of the present application is: an inner rubber outer plastic oil pipeline, which comprises, from inside to outside, a rubber inner layer, a winding layer and a plastic outer layer.

[0006] Further, the winding layer is a woven layer or a metal wire woven layer.

[0007] Further, a static conductive wire is provided between the rubber inner layer and the woven layer, which is in a straight line, an "S" shape, a "spring" shape or a mesh shape.

[0008] Further, a metal wire woven layer is provided between the winding layer or woven layer and the plastic outer layer.

[0009] Further, the plastic outer layer is provided with a metal wire woven layer and a plastic protective layer from inside to outside.

[0010] The continuous production composite process of the inner rubber outer plastic oil pipeline is as follows:

[0011] a: using a continuous production device to make a rubber inner layer;

[0012] b: using a continuous production device to wind a wire outside the rubber inner layer to form a winding layer or weave a wire outside the rubber inner layer to form a woven layer;

[0013] c: using a continuous production device to extrude a plastic outer layer outside the woven layer or winding layer.

[0014] Further, the step b is that the metal wire is woven outside the rubber inner layer by a continuous production device to form a metal wire woven layer.

[0015] Further, the step x is that the metal wire is woven outside the winding layer or the woven layer by a continuous production device to form a metal wire woven layer between the step b and the step c.

[0016] Further, the step d is that the metal wire is woven outside the plastic outer layer by a continuous production device to form a metal wire woven layer, and the step e is that a plastic protective layer is extruded outside the metal wire woven layer by a continuous production device.

[0017] Further, the continuous production device comprises a rubber extruder, a high-temperature channel at the outlet of the rubber extruder, a microwave device at the outlet of the high-temperature channel, a hot air channel at the outlet of the microwave device, a traction machine, a wire winding machine and / or a wire weaving machine, a first plastic extruder, a metal wire weaving machine, a second plastic extruder and a winding machine at the outlet of the hot air channel in sequence, air inlet pipes are uniformly distributed below the hot air channel, hot air is conveyed in the air inlet pipes, air outlet pipes are uniformly distributed above the hot air channel, and a conveying mesh belt for conveying the rubber inner layer is arranged in the hot air channel.

[0018] The technical effects of the present application mainly include the following aspects: the inner rubber outer plastic oil pipeline produced by the microwave vulcanization process and the plastic extrusion process meets the requirements of conveying diesel and gasoline, realizes continuous production, can be determined according to the quantity requirements of customers, has no waste, is more energy-saving and cost-saving, has less energy consumption and waste gas emission in the production process, has less tooling, is lower in cost, and has no sewage and oil discharge. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present application.

[0020] Figure 2 It is a structural schematic diagram of the continuous production device. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, which are intended to explain the present application and make the technical scheme of the present application easier to understand and master, and cannot be understood as a limitation of the present application.

[0022] Embodiment 1

[0023] The oil pipeline has the following five structures according to different types, which are as follows:

[0024] Structure A: for the low-pressure inner rubber outer plastic oil pipeline, the rubber inner layer, the winding layer and the plastic outer layer are sequentially included from inside to outside.

[0025] Structure B: for medium pressure inner layer rubber outer layer plastic oil pipeline, from inside to outside in turn includes rubber inner layer, braided layer and plastic outer layer, the inner layer and braided layer between the static wire is equipped with.

[0026] Structure C: for high pressure inner layer rubber outer layer plastic oil pipeline, from inside to outside in turn includes rubber inner layer, metal wire braided layer and plastic outer layer.

[0027] Structure D: as shown in the following figure: for high pressure inner layer rubber outer layer plastic oil pipeline, from inside to outside in turn includes rubber inner layer, winding layer (or braided layer), metal wire braided layer and plastic outer layer, the rubber inner layer and braided layer between the static wire is equipped with, the static wire is in the shape of a straight line, is in the shape of an S shape winding on the rubber inner layer outside, is in the shape of a spring winding on the rubber inner layer or multiple static wires are in the shape of a net cross winding on the rubber inner layer outside. Figure 1

[0028] Structure E: for high pressure inner layer rubber outer layer plastic oil pipeline, from inside to outside in turn includes rubber inner layer 1, winding layer (or braided layer 2), plastic outer layer 3, metal wire braided layer 4 and plastic protective layer 5, the rubber inner layer 1 and braided layer 2 between the static wire 6 is equipped with, the static wire is in the shape of a straight line, is in the shape of an S shape winding on the rubber inner layer outside, is in the shape of a spring winding on the rubber inner layer or multiple static wires are in the shape of a net cross winding on the rubber inner layer outside.

[0029] Example 2

[0030] The continuous production composite process for making the above structure A oil pipeline is as follows:

[0031] a: using rubber extruder to make rubber inner layer, microwave curing, hot air channel heat preservation;

[0032] b: using wire winding machine to wind wire on the rubber inner layer outside to form winding layer;

[0033] c: using the second extruder to extrude plastic outer layer outside the winding layer, winding.

[0034] The continuous production device includes rubber extruder, high temperature channel at the outlet of rubber extruder, microwave device at the outlet of high temperature channel, hot air channel at the outlet of microwave device and traction machine, wire winding machine, second plastic extruder, winding machine at the outlet of hot air channel in turn, the lower of hot air channel is uniformly distributed with air inlet pipe, air inlet pipe inside conveys hot air and winding machine, the upper of hot air channel is uniformly distributed with air outlet pipe, the hot air channel is equipped with conveying mesh belt for conveying rubber inner layer.

[0035] Among them, the wire winding machine is the existing fiber winding machine, and the second plastic extruder is the existing plastic extrusion pipe machine. ​

[0036] The oil pipeline of structure A is manufactured without passing through a wire braiding machine, a metal wire braiding machine and a first plastic extruder. The process can continuously produce, can be stopped according to the quantity required by customers, has no waste, is more energy-saving and cost-saving, has less energy consumption and exhaust emission in the production process, has less tooling, has lower cost, and has no sewage and oil discharge.

[0037] Example 3

[0038] The continuous production composite process for manufacturing the above-mentioned oil pipeline of structure B is sequentially performed according to the following steps:

[0039] a: a rubber inner layer is manufactured by using a rubber extruder, microwave curing and hot air channel heat preservation are performed;

[0040] b: a wire is braided outside the rubber inner layer to form a braided layer by using a wire braiding machine, and at the same time, a static conductive wire is laid between the braided layer and the inner layer by the other way of the wire braiding machine;

[0041] c: a plastic outer layer is extruded outside the braided layer by using a second extruder.

[0042] The continuous production device comprises a rubber extruder, a high-temperature channel located at the outlet of the rubber extruder, a microwave device located at the outlet of the high-temperature channel, a hot air channel located at the outlet of the microwave device, and a traction machine, a wire braiding machine, a first plastic extruder and a winding machine sequentially located at the outlet of the hot air channel. The hot air channel is uniformly distributed with air inlet pipes below and air outlet pipes above. The hot air channel is provided with a conveying mesh belt for conveying the rubber inner layer.

[0043] The wire braiding machine is an existing fiber braiding machine, and the second plastic extruder is an existing plastic extruding machine.

[0044] The oil pipeline of structure B is manufactured without passing through a wire braiding machine, a metal wire braiding machine and a first plastic extruder, and has all the effects of example 2.

[0045] Example 4

[0046] The continuous production composite process for manufacturing the above-mentioned oil pipeline of structure C is sequentially performed according to the following steps:

[0047] a: a rubber inner layer is manufactured by using a rubber extruder, microwave curing and hot air channel heat preservation are performed;

[0048] b: a steel wire is braided outside the rubber inner layer to form a metal wire braided layer by using a metal wire braiding machine;

[0049] c: a plastic outer layer is extruded outside the metal wire braided layer by using a second extruder.

[0050] The continuous production device comprises a rubber extruder, a high-temperature channel located at the outlet of the rubber extruder, a microwave device located at the outlet of the high-temperature channel, a hot air channel located at the outlet of the microwave device, and a traction machine, a wire winding machine (or a wire weaving machine), a metal wire weaving machine, a second plastic extruder and a winding machine located at the outlet of the hot air channel in sequence, air inlet pipes are uniformly distributed below the hot air channel, air outlet pipes are uniformly distributed above the hot air channel, and a conveying mesh belt for conveying the rubber inner layer is arranged in the hot air channel.

[0051] The metal wire weaving machine is an existing steel wire weaving machine, the wire winding machine is an existing fiber winding machine (or the wire weaving machine is an existing fiber weaving machine), and the second plastic extruder is an existing plastic extruding machine.

[0052] The oil pipeline of structure C is manufactured without passing through a wire winding machine, a wire weaving machine and a first plastic extruder, and has all the effects of embodiment 2.

[0053] Embodiment 5

[0054] The continuous production composite process for manufacturing the oil pipeline of structure D is as follows:

[0055] a: the rubber inner layer is manufactured by using a rubber extruder, microwave curing and hot air channel heat preservation are performed;

[0056] b: the wire is wound outside the rubber inner layer to form a winding layer by using a wire winding machine (or the wire is woven outside the rubber inner layer to form a weaving layer by using a wire weaving machine, and at the same time, the wire weaving machine is used to lay a static conductive wire between the weaving layer and the inner layer);

[0057] x: the metal wire is woven outside the inner layer to form a metal wire weaving layer by using a metal wire weaving machine;

[0058] c: the plastic outer layer is extruded outside the metal wire weaving layer by using a first extruder.

[0059] The continuous production device comprises a rubber extruder, a high-temperature channel located at the outlet of the rubber extruder, a microwave device located at the outlet of the high-temperature channel, a hot air channel located at the outlet of the microwave device, and a traction machine, a wire winding machine (or a wire weaving machine), a metal wire weaving machine, a second plastic extruder and a winding machine located at the outlet of the hot air channel in sequence, air inlet pipes are uniformly distributed below the hot air channel, air outlet pipes are uniformly distributed above the hot air channel, and a conveying mesh belt for conveying the rubber inner layer is arranged in the hot air channel.

[0060] The metal wire weaving machine is an existing steel wire weaving machine, the wire winding machine is an existing fiber winding machine (or the wire weaving machine is an existing fiber weaving machine), and the second plastic extruder is an existing plastic extruding machine.

[0061] The oil pipeline of structure D is manufactured without passing through a wire weaving machine (or a wire winding machine) and a first plastic extruder, and has all the effects of embodiment 2.

[0062] Example 6

[0063] The continuous production composite process for manufacturing the above-mentioned structure E oil pipeline is as follows: Follow these steps sequentially:

[0064] a: Use rubber extruder 11 to make rubber inner layer 1, microwave curing, and hot air channel insulation;

[0065] b: Use the wire winding machine 14 to wind the wire around the outside of the rubber inner layer 1 to form a winding layer (or use the wire braiding machine 141 to braid the wire around the outside of the rubber inner layer 1 to form a braided layer 2. At the same time, another wire braiding machine lays the static-dissipating wire 6 between the braided layer 2 and the rubber inner layer 1).

[0066] c: Use the first extruder to extrude the outer plastic layer 3 on the outside of the winding or braided layer 2;

[0067] d: Using a wire braiding machine 16, metal wires are braided onto the outer side of the outer layer to form a wire braided layer 4;

[0068] e: Use a second extruder to extrude a plastic protective layer 5 on the outside of the wire braided layer 4.

[0069] like Figure 2 As shown: The continuous production device includes a rubber extruder 11, a high-temperature channel 18 located at the outlet of the rubber extruder 11, a microwave device 12 located at the outlet of the high-temperature channel, a hot air channel 13 located at the outlet of the microwave device 12, and a traction machine, a wire winding machine 14 (or wire braiding machine), a first plastic extruder 15, a metal wire braiding machine 16, a second plastic extruder 17, and a winding machine located sequentially at the outlet of the hot air channel 13. The high-temperature channel is heated by carbon fiber. Air outlet pipes 132 are evenly distributed below the hot air channel 13 and evenly distributed above the hot air channel 13. The hot air channel is equipped with a conveyor belt for conveying the inner layer of rubber.

[0070] Among them, the metal wire braiding machine 16 is an existing steel wire braiding machine, the wire winding machine 14 is an existing fiber winding machine 14 (or the wire braiding machine is an existing fiber braiding machine), the first plastic extruder 15 is an existing plastic pipe extruder, and the second plastic extruder 17 is an existing plastic pipe extruder.

[0071] The oil pipeline of structure E can be fabricated without going through a wire braiding machine (or wire winding machine 14) and has all the effects of Example 2.

[0072] Description: The prior art wire braider 141 has a line to lay the static conductive line between the braided layer and the inner layer, the wire braider 141 braids the fiber while laying the static conductive line 6, which is a wire braider produced by Nanjing Fosute Machinery Co., Ltd. with a model of FST24L-140CF / QW1, while the wire winding machine 14 and the metal wire braider 16 do not have this function. For products that need static conductive lines for winding machines and metal wire braiders, manual laying or improvement of existing winding machines and metal wire braiders 16 can be performed.

[0073] The plastic material of the plastic outer layer or the plastic protective layer includes PVC, TPU, TPE, ABS, EVA, TPO, POE, PU, PA, thermoplastic elastomer, plastic or modified plastic.

[0074] Example 7

[0075] The embodiment is basically the same as examples 2-6, the only difference is that the first extruder or the second extruder is replaced by a rubber extruder 11 to make a rubber outer layer (the original plastic outer layer 3 or the plastic protective layer 5), high-temperature microwave curing, hot air channel insulation, that is, the rubber extruder 11 is used to make rubber inner and outer layers, microwave curing, hot air channel insulation instead of traditional steam vulcanization. The products produced by the traditional steam vulcanization have no exception of outer layer blistering or bulging.

[0076] In summary: through the design of the present application, taking example 6 as an example, from making rubber inner layer 1, winding layer (braided layer 2), plastic outer layer 3, metal wire braided layer 4, plastic protective layer 5, cutting according to customer requirements, one process, no need to roll multiple times in the process, realize the product meets the requirements of conveying diesel and gasoline, at the same time realize continuous production, can be determined according to customer product requirements, no waste, more energy saving and cost saving, less energy consumption in production process, less waste gas emission, less tooling, lower cost, no sewage and oil discharge.

[0077] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific embodiments, any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. An oil pipeline with an inner rubber layer and an outer plastic layer, characterized in that... From the inside out, it consists of an inner rubber layer, a winding layer, and an outer plastic layer. Follow these steps in sequence: a: Use a continuous production device to manufacture the inner layer of rubber; b: Using a continuous production device, the thread is wound around the outer side of the inner layer of rubber to form a winding layer; c: Using a continuous production unit to extrude a plastic outer layer on the outside of the winding layer; The continuous production apparatus includes a rubber extruder, a high-temperature channel at the outlet of the rubber extruder, a microwave device at the outlet of the high-temperature channel, a hot air channel at the outlet of the microwave device, and a traction machine, a wire winding machine, a first plastic extruder, a metal wire braiding machine, a second plastic extruder, and a winding machine located sequentially at the outlet of the hot air channel. Air inlet pipes are evenly distributed below the hot air channel, conveying hot air. Air outlet pipes are evenly distributed above the hot air channel. A conveyor belt for conveying the inner layer of rubber is installed inside the hot air channel.

2. The oil pipeline with an inner rubber layer and an outer plastic layer according to claim 1, characterized in that... The winding layer is a braided layer; Follow these steps in sequence: a: Use a continuous production device to manufacture the inner layer of rubber; b: Using a continuous production device, the thread is woven into the outer layer of the rubber inner layer to form a braided layer; c: Using a continuous production unit to extrude a plastic outer layer on the outside of the braided layer; The continuous production apparatus includes a rubber extruder, a high-temperature channel at the outlet of the rubber extruder, a microwave device at the outlet of the high-temperature channel, a hot air channel at the outlet of the microwave device, and a traction machine, a wire braiding machine, a first plastic extruder, a metal wire braiding machine, a second plastic extruder, and a winding machine located sequentially at the outlet of the hot air channel. Air inlet pipes are evenly distributed below the hot air channel, conveying hot air, and air outlet pipes are evenly distributed above the hot air channel. A conveyor belt for conveying the inner layer of rubber is installed inside the hot air channel.

3. The oil pipeline with an inner rubber layer and an outer plastic layer according to claim 2, characterized in that... The inner rubber layer and the braided layer are provided with electrostatic conductive wires. The electrostatic conductive wires are straight, S-shaped and laid flat on the outside of the inner rubber layer, spring-shaped and wound on the outside of the inner rubber layer, or mesh-shaped and crisscrossed on the outside of the inner rubber layer.

4. The oil pipeline with an inner rubber layer and an outer plastic layer according to claim 2, characterized in that... A metal wire braided layer is provided between the winding layer or braided layer and the plastic outer layer.

5. The oil pipeline with an inner rubber layer and an outer plastic layer according to claim 1, characterized in that... The outer plastic layer consists of a metal wire braided layer and a plastic protective layer, arranged sequentially from the inside out.

6. The oil pipeline with an inner rubber layer and an outer plastic layer according to claim 2, characterized in that... Step b is as follows: using a continuous production device to weave metal wires onto the outer side of the rubber inner layer to form a metal wire braided layer.

7. The oil pipeline with an inner rubber layer and an outer plastic layer according to claim 2, characterized in that... The step between step b and step c is step x, which is: using a continuous production device to weave metal wires onto the outside of the winding layer or the braided layer to form a metal wire braided layer.

8. The oil pipeline with an inner rubber layer and an outer plastic layer according to claim 2, characterized in that... The process also includes steps d and e. Step d: using a continuous production device to weave metal wires onto the outside of the plastic outer layer to form a metal wire braided layer; Step e: using a continuous production device to extrude a plastic protective layer onto the outside of the metal wire braided layer.

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