A rubber sheathed flexible cable specially used for elevators

Abstract

The utility model provides a rubber-sheathed flexible cable for elevators, which belongs to the field of cable technology and includes: a live core, which includes a first reinforcing core, a live conductor and a first insulating layer arranged from the inside to the outside; a neutral core, which includes a second reinforcing core, a neutral conductor and a second insulating layer arranged from the inside to the outside; a ground core, which includes a third reinforcing core, a ground conductor and a third insulating layer arranged from the inside to the outside; and a sheath layer, which wraps the live core, the neutral core and the ground core. The beneficial effects of the utility model are: the sheath layer wraps the live core, the neutral core and the ground core to protect the internal core from damage, and the reinforcing cores respectively arranged inside the live core, the neutral core and the ground core increase the tensile and bending resistance of the cable and improve the service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables and relates to a special rubber-sheathed soft cable for elevators. Background Art

[0002] At present, rubber sheathed flexible cables specially used for elevators are widely used in elevators, tower cranes, and other high-altitude operating equipment in real estate high-rise buildings. The conductor of ordinary rubber sheathed flexible cables specially used for elevators is composed of multiple thin copper wires, and an insulating rubber layer is installed outside the combined conductor. The insulating rubber layer is divided into main line insulating rubber layer, ground line insulating rubber layer, and neutral line insulating rubber layer. The main line rubber insulation layer, the ground line rubber insulation layer, and the neutral line rubber insulation layer are combined together to form a combined cable core, and a rubber protective layer is installed outside the cable core. Its composition structure belongs to ordinary rubber sheathed flexible cables specially used for elevators. It is only suitable for use in environments with few winding times and low frequency of back and forth winding. In ordinary back and forth winding working environments, the ground wire or neutral wire is prone to broken or pulled out, causing the cable to lose its electrical properties and unable to supply power normally, affecting the electrical performance. Ordinary rubber sheathed flexible cables specially used for elevators cannot meet the requirements of special environments.

[0003] For example, a utility model patent with a publication number of CN208596557U provides a rubber cable specially used for construction elevators, including an outer sheath and an inner sheath, the inner sheath is arranged inside the outer sheath, and a copper wire mesh is glued to the middle position of the outer sheath and the inner sheath, a first wire and a second wire are installed inside the inner sheath, and the outer sides of the first wire and the second wire are respectively wrapped with a first insulating sleeve and a second insulating sleeve, a rubber hose is located in the lower middle position of the inner sheath, the outer sides of the first insulating sleeve, the second insulating sleeve and the rubber hose are filled with fillers, and a groove is reserved on the outer side wall of the outer sheath.

[0004] In summary, some existing technical solutions still have the problems of poor tensile and bending resistance and easy breakage of cable cores, and there is much room for improvement. Summary of the invention

[0005] The utility model aims to solve the above problems in the prior art and proposes a special rubber sheathed soft cable for elevators.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a rubber-sheathed flexible cable specially used for elevators, comprising: a live wire core, which includes a first reinforcing core, a live wire conductor and a first insulating layer arranged from the inside to the outside; a neutral wire core, which includes a second reinforcing core, a neutral wire conductor and a second insulating layer arranged from the inside to the outside; a ground wire core, which includes a third reinforcing core, a ground wire conductor and a third insulating layer arranged from the inside to the outside; and a sheath layer, which wraps the live wire core, the neutral wire core and the ground wire core.

[0007] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, the first reinforcing core is an aramid wire reinforcing core, the second reinforcing core is an aramid wire reinforcing core, and the third reinforcing core is an aramid wire reinforcing core.

[0008] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, it also includes a sheathing layer, the sheathing layer wraps around the live wire core, the neutral wire core and the ground wire core, and the sheathing layer wraps around the sheathing layer.

[0009] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, it also includes a flame-retardant layer, which is arranged in the wrapping layer, and the flame-retardant layer wraps the neutral wire core and the ground wire core.

[0010] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, the flame-retardant layer is a high-temperature resistant cloth-reinforced rubber tube.

[0011] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, the sheath layer includes an inner sheath and an outer sheath, the inner sheath wraps around the wrapping layer, and the outer sheath wraps around the inner sheath.

[0012] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, the inner sheath is a flame-retardant polyvinyl chloride sheath, and the outer sheath is a flame-retardant polyvinyl chloride sheath.

[0013] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, the sheath layer also includes a reinforcement layer, and the reinforcement layer is arranged between the inner sheath and the outer sheath. The reinforcement layer wraps around the inner sheath, and the outer sheath wraps around the reinforcement layer.

[0014] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, the reinforcement layer is a polyester yarn braided layer.

[0015] In the above-mentioned rubber-sheathed flexible cable specially used for elevators, the first insulating layer is an EPDM insulating layer, the second insulating layer is an EPDM insulating layer, and the third insulating layer is an EPDM insulating layer.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The sheath layer wraps around the live wire core, the neutral wire core and the ground wire core to protect the internal wire core from damage. The reinforcing cores arranged inside the live wire core, the neutral wire core and the ground wire core respectively increase the tensile and bending resistance of the cable and improve its service life.

[0018] 2. The aramid fiber reinforced core increases the tensile and bending resistance of the cable.

[0019] 3. Use the wrapping layer to fix the live wire core, neutral wire core and ground wire core together to prevent the three wire cores from loosening.

[0020] 4. The flame retardant layer is arranged inside the wrapping layer to improve the flame retardancy of the internal wire core and prevent spontaneous combustion due to excessive internal temperature.

[0021] 5. The high temperature resistant cloth-reinforced rubber tube can protect the neutral and ground wires from external forces, thus keeping the electrical performance unaffected.

[0022] 6. The reinforcement layer uses polyester braided layer to improve the overall tensile strength and flexural resistance of the cable.

[0023] 7. The EPDM insulation layer can improve the cable's tensile strength, high temperature resistance and protect the internal wire core's electrical performance from being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a structural schematic diagram of a rubber-sheathed flexible cable specially used for elevators.

[0025] In the figure, 110, the first reinforcing core; 120, the live wire conductor; 130, the first insulating layer; 210, the second reinforcing core; 220, the neutral wire conductor; 230, the second insulating layer; 310, the third reinforcing core; 320, the ground wire conductor; 330, the third insulating layer; 410, the outer sheath; 420, the inner sheath; 500, the wrapping layer; 600, the flame retardant layer; 700, the reinforcing layer. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0032] like Figure 1 As shown, a rubber sheathed flexible cable specially used for elevators includes: a live wire core, a neutral wire core, a ground wire core and a sheath layer.

[0033] The live wire core includes a first reinforcing core 110 , a live wire conductor 120 and a first insulating layer 130 which are arranged from inside to outside.

[0034] The neutral line core includes a second reinforcing core 210 , a neutral line conductor 220 and a second insulating layer 230 which are arranged from inside to outside.

[0035] The ground wire core includes a third reinforcing core 310 , a ground wire conductor 320 and a third insulating layer 330 which are arranged from inside to outside.

[0036] Wherein, the sheath layer covers the live wire core, the neutral wire core and the ground wire core.

[0037] In this embodiment, the sheath layer wraps around the live wire core, the neutral wire core and the ground wire core to protect the internal wire core from damage. The reinforcing cores respectively arranged inside the live wire core, the neutral wire core and the ground wire core increase the tensile and bending resistance of the cable and improve its service life.

[0038] like Figure 1 As shown, on the basis of the above embodiment, the first reinforcing core 110 is an aramid wire reinforcing core, the second reinforcing core 210 is an aramid wire reinforcing core, and the third reinforcing core 310 is an aramid wire reinforcing core.

[0039] In this embodiment, the aramid fiber reinforcement core increases the tensile and bending resistance of the cable.

[0040] like Figure 1 As shown, based on the above implementation, it further includes a wrapping layer 500 , the wrapping layer 500 wraps the live wire core, the neutral wire core and the ground wire core, and the sheath layer wraps the wrapping layer 500 .

[0041] In this embodiment, the wrapping layer 500 combines and fixes the live wire core, the neutral wire core, and the ground wire core to prevent the three wire cores from loosening.

[0042] like Figure 1 As shown, based on the above embodiment, it further includes a flame retardant layer 600, and the flame retardant layer 600 is arranged in the wrapping layer 500, and the flame retardant layer 600 wraps the neutral wire core and the ground wire core.

[0043] In this embodiment, the flame retardant layer 600 is disposed inside the wrapping layer 500 to improve the flame retardancy of the internal wire core and prevent spontaneous combustion due to excessive internal temperature.

[0044] like Figure 1 As shown, based on the above embodiment, the flame retardant layer 600 is a high temperature resistant cloth-reinforced rubber tube.

[0045] In this embodiment, the high temperature resistant cloth-reinforced rubber tube can protect the neutral and ground wires from external forces, thereby leaving the electrical performance unaffected.

[0046] like Figure 1 As shown, based on the above embodiment, the sheath layer includes an inner sheath 420 and an outer sheath 410 , the inner sheath 420 wraps the wrapping layer 500 , and the outer sheath 410 wraps the inner sheath 420 .

[0047] In this embodiment, the inner sheath 420 and the wrapping layer 500 are squeezed by the outer sheath 410 to make the inner wire core more stable, thereby increasing the service life of the cable.

[0048] like Figure 1 As shown, on the basis of the above embodiment, the inner sheath 420 is a flame retardant polyvinyl chloride sheath, and the outer sheath 410 is a flame retardant polyvinyl chloride sheath.

[0049] In this embodiment, the flame retardant polyvinyl chloride sheath can increase the flame retardant performance of the sheath.

[0050] like Figure 1As shown, based on the above embodiment, the sheath layer further includes a reinforcement layer 700 , which is disposed between the inner sheath 420 and the outer sheath 410 , and the reinforcement layer 700 wraps the inner sheath 420 , and the outer sheath 410 wraps the reinforcement layer 700 .

[0051] In this embodiment, the reinforcement layer 700 is disposed between the inner sheath 420 and the outer sheath 410 so as to improve the strength of the entire cable from the inside to the outside.

[0052] like Figure 1 As shown, based on the above embodiment, the reinforcement layer 700 is a polyester yarn braided layer.

[0053] In this embodiment, the reinforcement layer 700 is a polyester yarn braided layer, which can improve the overall tensile strength and flexural resistance of the cable.

[0054] like Figure 1 As shown, based on the above embodiment, the first insulating layer 130 is an EPDM insulating layer, the second insulating layer 230 is an EPDM insulating layer, and the third insulating layer 330 is an EPDM insulating layer.

[0055] In this embodiment, the EPDM insulation layer can improve the tensile strength and high temperature resistance of the cable and protect the electrical performance of the internal core from being affected.

Claims

1. A rubber-sheathed flexible cable for elevators, characterized in that: include: The live wire core includes a first reinforcing core, a live wire conductor and a first insulating layer arranged from inside to outside; A neutral line core, comprising a second reinforcing core, a neutral line conductor and a second insulating layer arranged from inside to outside; A ground wire core, comprising a third reinforcing core, a ground wire conductor and a third insulating layer arranged from inside to outside; A sheath layer encloses the live wire core, the neutral wire core and the ground wire core.

2. A rubber-sheathed flexible cable for elevators as claimed in claim 1, characterized in that: The first reinforcing core is an aramid wire reinforcing core, the second reinforcing core is an aramid wire reinforcing core, and the third reinforcing core is an aramid wire reinforcing core.

3. A rubber-sheathed flexible cable for elevators as claimed in claim 1, characterized in that: It also includes a wrapping layer, which wraps around the live wire core, the neutral wire core and the ground wire core, and the sheath layer wraps around the wrapping layer.

4. A rubber-sheathed flexible cable for elevators as claimed in claim 3, characterized in that: It also includes a flame retardant layer, which is arranged in the wrapping layer and wraps the neutral wire core and the ground wire core.

5. A rubber-sheathed flexible cable for elevators as claimed in claim 4, characterized in that: The flame retardant layer is a high temperature resistant cloth-reinforced rubber tube.

6. A rubber-sheathed flexible cable for elevators as claimed in claim 3, characterized in that: The sheath layer comprises an inner sheath and an outer sheath, wherein the inner sheath surrounds the wrapping layer, and the outer sheath surrounds the inner sheath.

7. A rubber-sheathed flexible cable for elevators as claimed in claim 6, characterized in that: The inner sheath is a flame retardant polyvinyl chloride sheath, and the outer sheath is a flame retardant polyvinyl chloride sheath.

8. A rubber-sheathed flexible cable for elevators as claimed in claim 6, characterized in that: The sheath layer further includes a reinforcement layer, which is arranged between the inner sheath and the outer sheath. The reinforcement layer wraps around the inner sheath, and the outer sheath wraps around the reinforcement layer.

9. A rubber-sheathed flexible cable for elevators as claimed in claim 8, characterized in that: The reinforcement layer is a polyester yarn braided layer.

10. A rubber-sheathed flexible cable for elevators as claimed in claim 1, characterized in that: The first insulating layer is an ethylene-propylene rubber insulating layer, the second insulating layer is an ethylene-propylene rubber insulating layer, and the third insulating layer is an ethylene-propylene rubber insulating layer.

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