Steam heat tracing type liquid cargo conveying hose

Abstract

The invention relates to a steam heat tracing type liquid cargo conveying hose which is composed of an inner layer, an outer layer and a steam heat tracing layer arranged between the inner layer and the outer layer. The pressure-bearing framework is arranged between the inner rubber layer and the steam heat tracing layer, and static conductive copper wires are arranged on the pressure-bearing framework; the steam heat tracing layer is composed of steam heat tracing attached pipes and middle glue, the steam heat tracing attached pipes are spirally wound in the pipe body, and the space between the steam heat tracing attached pipes is filled with the low-density middle glue after the steam heat tracing attached pipes are wound and fixed; the outer layer is composed of a protective adhesive tape layer and an outer adhesive layer arranged outside the protective adhesive tape layer. According to the steam heat tracing type liquid cargo conveying hose, when liquid is conveyed, high-temperature steam can be introduced into the auxiliary pipe on the pipe wall of the hose to heat the hose, and the condensation phenomenon occurring when the liquid is conveyed in a low-temperature environment is prevented. The device can be used for liquid cargo conveying in ice areas, polar regions and other low-temperature environments.

Description

Technical Field

[0001] The invention relates to a steam-heated liquid cargo transmission hose, which can be used to transport liquid materials such as oil, fresh water, etc. in low-temperature environments of ice areas and polar regions. Background Art

[0002] In the oil extraction and chemical industries in the cold northern regions and even in the polar regions, the process pipelines and conveying hoses must ensure that they can still convey liquid materials normally and continuously under low temperature conditions. Process pipelines are mostly metal pipes, and their installation positions are fixed. Usually, the heat dissipation and temperature drop of the pipeline can be calculated according to the "GB50253-2014 Oil Pipeline Engineering Design Code" and "SH / T 3040 Petrochemical Pipeline Accompanying Pipe and Jacketed Pipe Design Code", and corresponding heating measures can be taken; because steam and hot water heating have fast heating speed, large heating range and low operating cost, the process pipeline is usually arranged with seamless steel pipes on the outside to pass high-temperature steam or hot water, and then hard or semi-hard circular insulation materials are laid. If soft materials are used, wire mesh must be used to fix the accompanying pipe and the insulation layer to ensure the heating space.

[0003] Hoses under low temperature conditions also need to have insulation capabilities or take insulation measures to maintain the temperature of the liquid cargo in the pipe to ensure that it is in a flowing state. Factories, ships, and offshore platforms have a large amount of superheated steam. Using steam to heat the hose can achieve liquid cargo transmission in low temperature environments. At present, there are no relevant technical methods for steam-heated liquid cargo transmission hoses in China. Summary of the invention

[0004] The present invention proposes a steam-heated liquid cargo transport hose, which can heat the hose by passing high-temperature steam through the attached pipe on the hose wall during liquid transport, thereby preventing condensation of the liquid when transported in a low-temperature environment. The hose can be used for liquid cargo transport in low-temperature environments such as ice areas and polar regions.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present invention is: a steam-heated liquid cargo transmission hose, composed of an inner layer, an outer layer and a steam heating layer arranged between the inner layer and the outer layer, the inner layer is composed of an inner rubber layer, a pressure-bearing skeleton, and an electrostatic conductive copper wire; the pressure-bearing skeleton is placed between the inner rubber layer and the steam heating layer, and the pressure-bearing skeleton is provided with an electrostatic conductive copper wire; the steam heating layer is composed of a steam heating attachment pipe and an intermediate rubber, the steam heating attachment pipe is spirally wound in the pipe body, and after winding and fixing, a low-density intermediate rubber is filled between the steam heating attachment pipes; the outer layer is composed of a protective tape layer and an outer rubber layer arranged outside the protective tape layer.

[0006] Furthermore, the inner layer's pressure-bearing skeleton includes a first tape layer, a second tape layer, a spiral steel wire, a third tape layer, and a fourth tape layer. After the inner tape layer is formed, the first tape layer, the second tape layer, the static-conducting copper wire, the spiral steel wire, the third tape layer, and the fourth tape layer are successively wound.

[0007] Furthermore, the inner rubber layer is made of hydrogenated nitrile rubber; the tape layer serves as the skeleton of the hose and is composed of a polyester cord fabric with high strength and low elastic modulus. The polyester cord fabric winding layer is wound in even numbers, using 2 layers or 4 layers of cross winding, with 2 layers as a cross layer, so that the hose is subjected to balanced force, and the number of layers and thickness can meet the bursting pressure requirements of the hose.

[0008] Furthermore, the adhesive tape layer is cross-wound around four layers of cord fabric at a balanced angle, and the winding balanced angle is 54°44′.

[0009] Furthermore, the static conductive copper wire is used to conduct away the static charge generated during the oil transportation process, and is composed of a plurality of thin copper wires.

[0010] Furthermore, the spiral steel wire is wound inside the tube body to enhance the hose's ability to withstand positive and negative pressures. The gaps after the spiral steel wire is wound are filled with filling glue, and adhesive glue is used on the inner and outer layers of the spiral steel wire to increase the bonding force with adjacent adhesive layers.

[0011] Furthermore, the steam heating attachment pipe is used to connect and transmit steam and conduct the heat carried by the steam to the entire pipe body, and is made of synthetic rubber; the intermediate rubber component is consistent with that of the steam heating attachment pipe.

[0012] Furthermore, the outer protective tape layer is composed of a pasting tape layer, a fifth tape layer, and a sixth tape layer. After the steam heating attached pipe and the filling tape are formed, the pasting tape layer, the fifth tape layer, and the sixth tape layer are successively wound.

[0013] Furthermore, the outer rubber layer is made of natural rubber NR + EPDM which are resistant to aging, UV rays and wear.

[0014] Furthermore, the filling rubber adopts highly wear-resistant carbon black and a semi-reinforcement material with low heat generation.

[0015] The beneficial effects of the present invention are:

[0016] (1) The steam-heated liquid cargo transport hose of the present invention can heat the hose by passing high-temperature steam through the attached pipe on the hose wall during liquid transport, thereby preventing condensation of the liquid when transported in a low-temperature environment. It can be used for liquid cargo transport in low-temperature environments such as ice areas and polar regions;

[0017] (2) The inner tube billet cord winding layer is wound in even numbers, 2 layers, or 4 layers of cross winding, 2 layers as a cross layer, so that the hose is stressed evenly;

[0018] (3) It has a spiral steel wire layer to support the tube body and enhance the hose's ability to withstand positive and negative pressures;

[0019] (4) With steam heating pipe, which is spirally wound on the inner tube;

[0020] (5) There are two layers of curtains wrapped around the outside of the steam heating pipe to protect the heating layer;

[0021] (6) The main material of the steam heating pipe is chloroprene rubber, ethylene propylene rubber or butyl rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the steam-heated liquid cargo transmission hose of the present invention;

[0023] Figure 2 It is a cross-sectional schematic diagram of the steam-heated liquid cargo transmission hose of the present invention;

[0024] In the figure: 1. inner rubber layer, 2. first tape layer, 3. second tape layer, 4. static conductive copper wire, 5. spiral steel wire, 6. filling rubber, 7. third tape layer, 8. fourth tape layer, 9. steam heating pipe, 10. middle rubber, 11. fifth tape layer, 12. sixth tape layer, 13. outer rubber layer, 20. inner layer, 21. steam heating layer, 22. outer layer. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1 As shown in FIG. 2 , a steam-heated liquid cargo transmission hose of the present invention is composed of an inner layer 20, a steam heating layer 21, and an outer layer 22. The inner layer 20 is composed of an inner rubber layer 1, a pressure-bearing skeleton, an electrostatic conductive copper wire 4, etc.; the steam heating layer 21 is composed of a steam heating auxiliary pipe 9 and an intermediate rubber 10. The steam heating auxiliary pipe 9 is spirally wound 6 in the pipe body. After being wound and fixed, a low-density intermediate rubber 10 is filled between the steam heating auxiliary pipes 9. The intermediate rubber 10 can not only fill the gaps between the steam heating auxiliary pipes 9, but also play a role in heat preservation; the outer layer 22 is composed of a protective tape layer and an outer rubber.

[0027] The steam heating hose of the present invention has the following characteristics:

[0028] (1) The inner layer 20 is the tube blank of the entire steam-heated liquid cargo transfer hose, which is composed of an inner rubber layer 1, a first rubber tape layer 2, a second rubber tape layer 3, a static conductive copper wire 4, a spiral steel wire 5, a third rubber tape layer 7, and a fourth rubber tape layer 8.

[0029] (2) The inner rubber layer 1 is made of hydrogenated nitrile rubber. After the inner rubber layer 1 is formed, a first rubber tape layer 2, a second rubber tape layer 3, a static conductive copper wire 4, a spiral steel wire 5, a third rubber tape layer 7, and a fourth rubber tape layer 8 are successively wound around it.

[0030] (3) The inner rubber layer 1 is in direct contact with the oil and is immersed in the oil for a long time. It is composed of hydrogenated nitrile rubber with good oil resistance. The first rubber layer 2, the second rubber layer 3, the third rubber layer 7, and the fourth rubber layer 8 are used to withstand the internal pressure of the conveyed liquid and the tension generated by the dragging of the hose. They are composed of high-strength rubberized polyester cord fabrics.

[0031] (4) The tape layer is the skeleton of the hose, which is composed of polyester cord fabric with high strength and low elastic modulus. The cord fabric winding layer should be wound in even numbers, that is, it should be 2 layers or 4 layers of cross winding, with 2 layers as a cross layer, so that the hose is stressed evenly. The number of layers and thickness can meet the bursting pressure requirements of the hose.

[0032] (5) In order to ensure that the hose has better dimensional stability under pressure, the tape layer is cross-wound with four layers of fabric at a balanced angle, and the winding balance angle is 54°44′.

[0033] (6) The static-conducting copper wire 4 can conduct away the static charge generated during the oil transportation process, and is composed of a plurality of thin copper wires.

[0034] (7) The spiral steel wire 5 is wound inside the tube body to enhance the ability of the hose to withstand positive and negative pressures. The gaps after the steel wire is wound are filled with filling glue, and adhesive glue is used on the inner and outer layers of the spiral steel wire 5 to increase the bonding force with the adjacent adhesive layers.

[0035] (8) The steam tracing attachment pipe 9 is spirally wound on the inner tube blank, and the gaps within the pitch are filled with an intermediate rubber 10. The composition of the intermediate rubber 10 is the same as that of the steam tracing attachment pipe 9.

[0036] (9) Steam heating attachment pipe 9 is used to connect and transmit steam and conduct the heat carried by the steam to the entire pipe body. It is made of synthetic rubber. In order to ensure the aging resistance of the rubber under high-temperature steam, chloroprene rubber can be used together with an appropriate amount of natural rubber, and some recycled rubber can be appropriately added to improve the calendering, extrusion and high-temperature resistance of the rubber; chloroprene rubber can also be replaced by ethylene-propylene rubber or butyl rubber.

[0037] (10) The outer layer 22 is composed of a rubber layer, a fifth rubber layer 11, a sixth rubber layer 12 and an outer rubber layer 13. After the steam tracing auxiliary pipe 9 and the filling rubber are formed, the rubber layer, the fifth rubber layer 11 and the sixth rubber layer 12 are wound successively.

[0038] (11) The outer rubber layer 13 is made of natural rubber NR + EPDM which is resistant to aging, UV rays and wear. The outer coating of the pipe body uses EPDM with good ozone and UV aging resistance as the rubber type. The vulcanization system uses metal oxides and sulfur as the vulcanization system, sulfonamide accelerators as the vulcanization accelerator system, and anti-ozonants as the protection system to increase the resistance of the rubber to ozone and UV aging. In order to ensure the bonding performance of the rubber, adhesives are added as auxiliary materials.

[0039] (12) Selection of reinforcing filler. The reinforcing filler selected highly wear-resistant carbon black and semi-reinforcing materials with low heat generation. These materials give the rubber good tensile strength, tear strength and elongation, and also give the rubber a certain wear resistance.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this patent, rather than to limit it. Although this patent has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of this patent.

Claims

1. A steam-heated liquid cargo transmission hose, characterized in that: It consists of an inner layer, an outer layer and a steam heating layer arranged between the inner layer and the outer layer. The inner layer consists of an inner rubber layer, a pressure-bearing frame and an electrostatically conductive copper wire. The pressure-bearing frame is placed between the inner rubber layer and the steam heating layer, and an electrostatically conductive copper wire is arranged on the pressure-bearing frame. The steam heating layer consists of a steam heating attachment pipe and an intermediate rubber. The steam heating attachment pipe is spirally wound in the pipe body. After winding and fixing, a low-density intermediate rubber is filled between the steam heating attachment pipes. The outer layer consists of a protective tape layer and an outer rubber layer arranged outside the protective tape layer.

2. The steam-heated liquid cargo transmission hose according to claim 1 is characterized in that: The inner layer of the pressure-bearing skeleton includes the first tape layer, the second tape layer, the spiral steel wire, the third tape layer, and the fourth tape layer. After the inner layer is formed, the first tape layer, the second tape layer, the static conductive copper wire, the spiral steel wire, the third tape layer, and the fourth tape layer are successively wound.

3. The steam-heated liquid cargo transmission hose according to claim 1 is characterized in that: The inner rubber layer is made of hydrogenated nitrile rubber; the tape layer serves as the skeleton of the hose and is composed of polyester cord fabric with high strength and low elastic modulus. The polyester cord fabric winding layer is wound in even numbers, using 2 layers or 4 layers of cross winding, with 2 layers as a cross layer, so that the hose is subjected to balanced force, and the number of layers and thickness can meet the bursting pressure requirements of the hose.

4. The steam-heated liquid cargo transfer hose according to claim 3 is characterized in that: The tape layer is cross-wound with four layers of cord fabric at a balanced angle, and the winding balance angle is 54°44′.

5. The steam-heated liquid cargo transmission hose according to claim 1 is characterized in that: The static conductive copper wire is used to conduct away the static charge generated during the oil transportation process and is composed of multiple thin copper wires.

6. The steam-heated liquid cargo transmission hose according to claim 1 is characterized in that: The spiral steel wire is wound inside the pipe body to enhance the hose's ability to withstand positive and negative pressures. The gaps after the spiral steel wire is wound are filled with filling glue, and adhesive glue is used on the inner and outer layers of the spiral steel wire to increase the bonding force with adjacent adhesive layers.

7. The steam-heated liquid cargo transmission hose according to claim 1 is characterized in that: The steam heating attachment pipe is used to connect and transmit steam and conduct the heat carried by the steam to the entire pipe body. It is made of synthetic rubber; the intermediate rubber composition is consistent with that of the steam heating attachment pipe.

8. The steam-heated liquid cargo transfer hose according to claim 1 is characterized in that: The outer protective tape layer is composed of a pasting tape layer, a fifth tape layer and a sixth tape layer. After the steam heating attached pipe and the filling tape are formed, the pasting tape layer, the fifth tape layer and the sixth tape layer are wound successively.

9. The steam-heated liquid cargo transfer hose according to claim 1, characterized in that: The outer rubber layer is made of natural rubber NR + EPDM which is resistant to aging, UV rays and wear.

10. The steam-heated liquid cargo transmission hose according to claim 1 or 6, characterized in that: The intermediate rubber and filling rubber are made of highly wear-resistant carbon black and semi-reinforced materials with low heat generation.

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