• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Rope for use in explosive environments, with a central core, a conductive mesh and a sheath, where the conductive mesh is formed by braided strands, none of them arranged at an angle parallel to the axial direction, and each strand comprising at least one strand electrically conductive, and wherein the sheath is formed by braided strands, each strand comprising at least one strand comprising at least one capillary coated with conductive material. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2708968A1
    申请号:ES201731202
    申请日:2017-10-11
    公开日:2019-04-12
    发明作者:Lacruz José Joaquín Castaño
    申请人:SA De Cabulleria Industrial Y Deportiva；
    IPC主号:
    专利说明:

    [0001]
    [0002] Rope for use in explosive environments
    [0003]
    [0004] OBJECT OF THE INVENTION
    [0005]
    [0006] The purpose of the present invention application is the registration of a rope that incorporates notable innovations and advantages over the techniques used so far, particularly suitable for use in explosive environments.
    [0007]
    [0008] More specifically, the invention proposes the development of a robust rope in its use, for systems of individual protection against loads or load manipulation, which by its particular disposition, allows to derive the static electricity towards a ground connection and to avoid the electrostatic agglomeration and the electrification of the rope, thus avoiding any spark in flammable environments.
    [0009]
    [0010] BACKGROUND OF THE INVENTION
    [0011]
    [0012] The sparks generated by the effects of static electricity are familiar to most people. Due to shocks, frictions and many other circumstances, the accumulation of electrical charges in the peripheral parts of the materials is generated. When the electrostatic field generated by electric charges exceeds the dielectric force of air, a rapid increase in the number of electrons and free ions in the air is generated, causing the air to suddenly become an electrical conductor and a conductive channel to be generated. ionized, that is, a spark. The effects of this sudden and momentary electrical current can lead from a small discomfort on a person, to fire and explosions if the air contains combustible gases or particles.
    [0013]
    [0014] Both in mountaineering sports, as in the assurance in vertical works or in the manipulation of loads, the rubbing of the cords with the elements of anchoring and regulation generates static electricity that accumulates in the own rope and / or in the persons or Objects that hang or move through it, which can be dangerous.
    [0015] Conventional strings, made of intrinsically insulating synthetic fibers, are not able to properly derive the static electricity to a ground connection, so it is agglomerated in the rope.
    [0016]
    [0017] Some anti-static ropes are known in the state of the art, which have metallic conductor wires added to derive the static electricity to a ground connection. An example of this type of rope is shown in patent document CN105155315, whose wires are alternately coated with polytetrafluoroethylene fibers and metal fibers. In document US2005082083, a rope with an outer sheath is shown which includes non-conducting elements braided with conductive elements, wound in a parallel helical pattern and do not touch each other. The inner core is a braid comprising monofilaments of synthetic or natural fibers and metal cords. JPH01207483 discloses a synthetic fiber rope, subjected to an electrically conductive coating of copper or nickel. The rope shown in document CN2191231 is a rope whose individual fibers are composed of a stainless steel fiber and a synthetic fiber.
    [0018]
    [0019] The problem with these ropes is that due to the disposition of the threads with metal, which do not have elasticity, they do not guarantee the performance in the support of vertical works, breaking when subjected to impact loads (for example, stopping the a person).
    [0020]
    [0021] Therefore, there is still a need for a robust rope in its use, capable of deriving static electricity and maintaining the necessary elasticity as an element of protection against bricks or for the manipulation of loads.
    [0022]
    [0023] DESCRIPTION OF THE INVENTION
    [0024]
    [0025] The present invention has been developed for the purpose of providing a rope for use in explosive atmospheres which is configured as a novelty within the field of application and which covers the aforementioned requirements.
    [0026]
    [0027] The object of this invention corresponds to a rope prepared to eliminate static electricity and, therefore, prevent possible explosions in environments susceptible to such risk, allowing the normal execution of knots and the use of the individual protection elements used with the ropes, such as blockers, descenders and anti-callas.
    [0028]
    [0029] The structure of the present rope comprises three concentric structures:
    [0030] - an electrically insulating central core with exclusively mechanical function - a conductive mesh with exclusively electrical function
    [0031] - a partially conductive cover with mixed mechanical and electrical functions
    [0032]
    [0033] The central core, as in conventional cords, is preferably formed of high tenacity polyamide yarns. A possible core structure contains 8 twists, of 3 strands each, each strand being composed of 16 polyamide threads of 940 decitex.
    [0034]
    [0035] Unlike the cords disclosed in the state of the art, the present cord comprises a conductive mesh, located around the core, which gives it a great longitudinal electrical conductivity. It consists of several braided spindles or branches, each branch comprising one or more electrically conductive filaments. The branches are arranged at an angle not parallel to the axial direction, preferably close to 45 °, and leaving spaces that allow movement between them. The design of this structure gives longitudinal elasticity to the mesh despite being metal, preventing it from working mechanically. In addition, it allows you to remain structurally Integra after having been subjected to impact loads (for example when stopping a person's flow), maintaining its conductivity. A preferable structure of the mesh comprises 16 strands, each comprising 3 strands of stacked copper.
    [0036]
    [0037] Thanks to the present arrangement of the conductive mesh, it is possible to provide the rope with the appropriate structural elasticity, thus overcoming the mechanical limitations of its constituent material. When traction is exerted on the rope (either by ascent, descent, loads of persons or loads, or by the forces caused by the manipulation of loads on a rope for this purpose), the stresses generated are absorbed by the deformations of the fibers textiles The metallic filaments are accommodated from a structural point of view through the variation of the angles of their geometry, without making longitudinal deformations, and therefore without generating tensions in them.
    [0038] Another distinctive aspect of the present invention resides in the fact that the sheath, which wraps the previous conductive mesh, integrates conductive elements that help to transport the electric charges from the surface of the rope to the conductive mesh, while at the same time supporting part of the mechanical effort of the rope.
    [0039]
    [0040] Each of the strands of the braid of the sheath incorporates one or several capillaries covered totally or partially with conductive material. Radially, because the distance is reduced, the sheath offers little electrical resistance from its outside to the conductive mesh, but is sufficiently resistive so as not to conduct electrical loads longitudinally on the outside, away from the explosive environment.
    [0041]
    [0042] For example, a preferable structure of the sheath will be formed by 32 strands, each strand comprising 1 strand of 7 strands of 140 polyamide capillaries each, and having 2 partially conductive strands, helically crosslinked on the anterior strand. These last 2 cords are preferably each formed by a bundle of 34 polyamide capillaries with silver particles in the peripheral zone, either in the form of nanometer or colloid films, plus two bundles of 25 polyester capillaries.
    [0043]
    [0044] By the combination of this type of sheath with the aforementioned conductive mesh a rope is obtained that allows to easily eliminate the static loads of both the user and the elements in contact, avoiding any possible spark that could originate an ignition source and a possible explosion.
    [0045]
    [0046] An additional advantage of this rope structure is that the user can verify the correct condition of the conductive mesh prior to its use in explosive environments without the need to unwind the rope, simply by measuring the electrical resistance between its ends. This type of rope structure, designed effectively and in good condition, should offer a resistance less than one ohm per meter. It is indicative of significant impairment and impairment of the conductive mesh in case the measurement is greater than one ohm per meter. If the reading reaches values of tens or hundreds of ohms per meter it means that the electrical connection has been practically lost at some point of the string due to the destruction of all the filaments of the mesh in said section. In any case, and thanks to the claimed structure of the sheath, simply by moving the point of measurement of the resistance along the rope, the disconnection point produced in the mesh can be detected. It should be said that in this type of structure, carrying the rope practically to the mechanical breakage of the synthetic fibers, the electrical resistance increases around 37% only, this type of conductive mesh therefore being an element that tolerates mechanical stress well.
    [0047]
    [0048] In order to facilitate the mechanical anchoring of the rope to fastening elements, for example a ratchet, at least one of the ends of the rope can be bent and sewn on the same rope, in the manner of a loop.
    [0049]
    [0050] To eliminate electrostatic charges, the rope preferably comprises at least one grounding connector. A possible connector can be formed by a metal mesh, with a first section in direct contact with the conductive mesh, being located inside the sheath and pressed by it, and a second section that is outside the sheath, which contains a metal terminal attached at its end and which comprises a hole for screws.
    [0051]
    [0052] Another possible connector can be formed by a clamp with two clamps screwed together or a crocodile-type clamp, which comprise needles or spikes that partially or completely cross the sleeve, being in contact with or very close to the conductive mesh. A metal terminal with a screw hole will be attached to one of the clamps to facilitate earth contact.
    [0053]
    [0054] These and other characteristics and advantages of the rope object of the present invention will be apparent from the description of a preferred, but not exclusive, embodiment, which is illustrated by way of non-limiting example in the accompanying drawings.
    [0055]
    [0056] BRIEF DESCRIPTION OF THE FIGURES
    [0057]
    [0058] Figure 1 .- Shows the arrangement of the elements that form the rope of the present invention.
    [0059] Figure 2.- Shows the arrangement of the beams in the partially conductive cords of the rope sheath.
    [0060] Figure 3.- Shows the arrangement of the end of the rope sewn to itself together with an optional grounding for the rope.
    [0061] Figure 4 shows another optional embodiment of grounding for the rope.
    [0062] DESCRIPTION OF A PREFERRED EMBODIMENT
    [0063]
    [0064] A preferred embodiment of the present cord (1) comprises a central core (2), a conductive mesh (3) and a sheath (4), as shown in Fig. 1.
    [0065]
    [0066] The central core (2) is formed by 8 twists, of 3 strands each, each strand being composed of 16 polyamide strands.
    [0067]
    [0068] The conductive mesh (3), located around the core (2), is formed by 16 branches (31) spaced between them and arranged at an angle close to 45 °, each comprising three filaments (32) of stacked copper.
    [0069]
    [0070] The cover (4), which wraps the previous conductive mesh (3), is formed by 32 branches (41), each branch comprising 1 cord of 7 beams of 140 polyamide capillaries each, and having two cords (42) partially conductive helically cross-linked over the anterior cord. As shown in Fig. 2, these last 2 cords are each formed by three beams, one partially conductive (43), made of polyamide capillaries with silver particles in the peripheral zone, and two other insulating beams ( 44), made of polyester capillaries.
    [0071]
    [0072] In order to facilitate the mechanical anchoring of the rope (1) to fastening elements, for example a ratchet, at least one of the ends (5) of the rope (1) can be bent and joined by a seam (6) to it. rope (1), as a loop, as shown in Fig. 3.
    [0073]
    [0074] In the same Fig. 3 can be seen a possible embodiment of ground (8) for the rope (1) capable of eliminating electrostatic charges, formed by a metal mesh (81), with a first section in direct contact with the conductive mesh (3) to be located inside the case (4) and pressed by it, and a second section that is outside the case (4), containing a metal terminal (82) attached at its end and which comprises a hole for screws ..
    [0075]
    [0076] In Fig. 4 another possible earthing realization for the rope (1) is shown, formed by a staple (7) with two clamps (71) joined together by screws (72), which comprise needles (73) that go completely through the sheath (4) of the rope (1), leaving in contact with the conductive mesh (3). A metal terminal (74) with a screw hole is attached to one of the clamps (71) to facilitate earth contact.
    [0077] These and other characteristics and advantages of the rope object of the present invention will be apparent from the description of a preferred embodiment, but not exclusive, which is illustrated by way of non-limiting example in the accompanying drawings.
    权利要求:
    Claims (13)
    [1]
    1. Rope for use in explosive environments, with an electrically insulating central core, characterized in that it comprises a conductive mesh, concentric around the core, and a partially conductive, concentric sheath around the mesh.
    [2]
    Rope according to claim 1, characterized in that the conductive mesh is formed by at least four braided strands between them, none of them arranged at an angle parallel to the axial direction, and each strand comprising at least one electrically conductive filament.
    [3]
    Rope according to claim 2, characterized in that the conductive mesh comprises 16 branches, each comprising 3 electrically conductive filaments.
    [4]
    4. Rope according to claim 2 or 3, characterized in that the filaments of the mesh are made of stacked copper.
    [5]
    Rope according to any one of the preceding claims, characterized in that the sheath is formed by at least eight braided strands, each strand comprising at least one strand comprising at least one capillary partially or completely covered with conductive material.
    [6]
    6. Rope according to claim 5, characterized in that the braided cover comprises 32 branches, each branch comprising:
    - 1 cord made up of 7 bundles of 140 polyamide capillaries each,
    - 2 cords, arranged helically crosswise on the previous cord, each formed by a bundle of 34 polyamide capillaries comprising a coating of conductive material and two bundles of 25 polyester capillaries
    [7]
    Rope according to claim 5 or 6, characterized in that the coating material is a nanometer silver surface film.
    [8]
    Rope according to claim 5 or 6, characterized in that the coating material is a silver surface colloid.
    [9]
    Rope according to any one of the preceding claims, characterized in that at least one of the ends is bent and sewn on the same rope, in the manner of a loop.
    [10]
    Rope according to any one of the preceding claims, characterized in that it comprises at least one grounding connector, formed by:
    - a metal mesh, with a first section in direct contact with the conductive mesh, located inside the sheath and pressed by it, and a second section that is outside the sheath, and
    - a metal terminal attached to the end of the metal mesh that is outside the sheath, which comprises a hole for screws.
    [11]
    Rope according to any one of the preceding claims, characterized in that it comprises at least one grounding connector, formed by a clip with two clamps screwed together and a metal terminal with a screw hole attached to one of the clamps.
    [12]
    12. Use of a rope according to any of the preceding claims, for manipulation of loads, dragging or tensioning work.
    [13]
    13. Use of a rope according to any of the previous claims, for systems of individual protection against bricks.
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    同族专利:
    公开号 | 公开日
    ES2708968B2|2019-08-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR1348475A|1964-04-15|
    US3805667A|1970-08-21|1974-04-23|Columbian Rope Co|Braided rope|
    EP0025223A1|1979-09-07|1981-03-18|Gebrüder Kesel GmbH & Co.|Climbing-rope with core|
    CN2191231Y|1994-05-25|1995-03-08|劳动部劳动保护科学研究所|Electrostatic prevention safety rope|
    CN202187237U|2011-04-13|2012-04-11|中国石油集团安全环保技术研究院大连分院|Anti-static sampling rope|
    WO2013160139A2|2012-04-24|2013-10-31|Nv Bekaert Sa|Multi-strand hybrid rope|
    法律状态:
    2019-04-12| BA2A| Patent application published|Ref document number: 2708968 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190412 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201731202A|ES2708968B2|2017-10-11|2017-10-11|Rope for use in explosive environments|ES201731202A| ES2708968B2|2017-10-11|2017-10-11|Rope for use in explosive environments|
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