A high strength cable for an elevator

Abstract

The application discloses a high-strength cable for an elevator, relates to the technical field of elevator cables, and comprises a plurality of cable core wires and a sheath outer layer for covering the cable core wires, the inner side of the sheath outer layer is provided with elastic limiting bodies, the cross section of the elastic limiting bodies is X-shaped and is formed with four elastic supporting parts, an arc-bottom V-shaped groove is formed between two corresponding elastic supporting parts located at left and right ends, and a large-arc-bottom groove is formed between two corresponding elastic supporting parts located at upper and lower ends; the plurality of cable core wires are respectively located in corresponding arc-bottom V-shaped grooves and large-arc-bottom grooves; wherein the arc-bottom V-shaped groove is bullet-shaped, the bottom is arc-shaped, the up-down spacing from the bottom to the other end gradually increases, and the increasing arc gradually decreases; the height of the bottom of the large-arc-bottom groove to the other end is greater than or equal to the diameter of the cable and less than four times the diameter of the cable. The application has the effects of improving structural strength and relieving external pressure.

Description

Technical Field

[0001] This application relates to the field of elevator cable technology, and in particular to a high-strength cable for elevators. Background Technology

[0002] Flat cables, also known as ribbon cables, are flat conductors formed by combining many wires together. These cables are inexpensive, lightweight, and highly flexible, making them easy to use in both large and small equipment. Flat cables are resistant to heat radiation, cold, and acids and alkalis, and can operate in ambient temperatures ranging from -40°C to 70°C. Currently, flat cables are used as traveling cables in elevators, allowing them to move with the elevator car and transmit essential power.

[0003] Chinese Patent No. CN217214233U discloses a high-strength flat cable for elevators. The high-strength flat cable for elevators includes an outer sheath and an internal flame-retardant filler and a core. The outer wall of the core is wrapped with an insulating shielding layer. A support member is provided at the center of the inner wall of the outer sheath, which abuts against the top and bottom of the inner wall. The support member is an elastic and deformable "I" shape. The support member is hollow inside and has a limiting member. Reinforcing strands are provided inside the outer sheath and on both sides of the core.

[0004] However, while supporting the high-strength elevator flat cable solely with an "I"-shaped support member can resist external pressure and limit the minimum compression value of the support member, the frequent use of elevators can also cause irreversible damage to the support member. Consequently, when the support member deforms and fails to provide effective support, it will affect the stable power transmission of the high-strength elevator flat cable, which needs to be improved. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a high-strength cable for elevators, which can improve structural strength while alleviating external pressure, thereby effectively extending service life. The specific solution is as follows: A high-strength cable for elevators includes multiple cable cores and an outer sheath covering the cable cores. An elastic limiting body is provided on the inner side of the outer sheath. The elastic limiting body has an X-shaped cross-section and four elastic support portions. An arc-bottomed V-shaped groove is formed between two corresponding elastic support portions at the left and right ends, and a large arc-bottomed groove is formed between two corresponding elastic support portions at the upper and lower ends. The multiple cable cores are respectively located in the corresponding arc-bottomed V-shaped groove and the large arc-bottomed groove. The arc-bottomed V-shaped groove is bullet-shaped with an arc-shaped bottom, and the vertical distance from the bottom to the other end gradually increases, while the increasing arc gradually decreases. The height from the bottom to the other end of the large arc-bottomed groove is greater than or equal to the cable diameter and less than four times the cable diameter.

[0006] Preferably, multiple cable cores are located within the corresponding large arc-shaped bottom groove, with the cable core in the middle portion being close to the bottom of the large arc-shaped bottom groove. An even number of cable cores are symmetrically distributed at both ends of the cable core in the middle portion, and the vertical distance from the cable core farther from the cable core in the middle portion to the bottom of the large arc-shaped bottom groove is greater. At least one cable core is located at one end of the arc-shaped bottom V-groove near the bottom.

[0007] Preferably, the outer sides of the cable core and the elastic limiting body are wrapped with a fireproof and high-temperature resistant layer; the fireproof and high-temperature resistant layer consists of two side protrusions located at the left and right ends respectively and two arc-shaped protrusions located at the top and bottom ends respectively, the adjacent side protrusions and arc-shaped protrusions are connected to each other, and a pressure relief cavity is provided in the fireproof and high-temperature resistant layer at the end of the arc-shaped V-groove away from the bottom.

[0008] Preferably, the end of the elastic support is provided with a high-strength pressure-resistant arc-shaped body, and part of the pressure relief cavity is located between the two high-strength pressure-resistant arc-shaped bodies at the corresponding end.

[0009] Preferably, the elastic limiting body is provided with multiple compression-resistant arc grooves on the left and right ends of the two high-strength compression-resistant arc-shaped bodies, which are spaced apart along the length direction.

[0010] Preferably, the fireproof and high-temperature resistant layer is provided with a high-strength adhesive layer, a wear-resistant layer, a tensile inner layer and a sheath outer layer in sequence on the outer side.

[0011] Preferably, the high-strength adhesive layer comprises a preform film obtained by mixing and casting a base resin, a modified resin, an organic peroxide, and a coupling agent, and then subjecting it to coating, radiation, or thermal crosslinking; wherein the base resin, modified resin, organic peroxide, and coupling agent are in a weight ratio of 1-20:10-50:0.1-2:0.1-2; wherein the modified resin is ethylene containing at least one first active group and a second active group, and one or more of methyl acrylate, methyl methacrylate, 1,4-pentadiene, dicyclopentadiene, and 1,4-hexadiene in any proportion; wherein the first active group is a halogen, aldehyde, sulfonic acid, epoxy, cyano, or isocyanate group; and the second active group is an amino, carboxyl, or hydroxyl group.

[0012] Preferably, the matrix resin is one or more of the copolymers of ethylene and vinyl acetate, propylene, butene, pentene, hexene, or octene mixed in any proportion, with a melting point of 40-90℃ and a melt index of 2-25 g / 10 min; the organic peroxide is at least one of bis(1-octoxy-2,2,6,6-tetramethyl-4-piperidinyl)succinate, vinyltriperoxide tert-butylsilane, 2,5-dimethyl-2,5-(bis-tert-butylperoxy)hexane, tert-butyl peroxide 3,3,5-trimethylhexanoate, ethyl 3,3-bis(tert-amylperoxy)butanoate, lauric acid peroxide, and 1,1-bis(tert-amylperoxy)cyclohexane; and the coupling agent is a silane coupling agent.

[0013] Preferably, the wear-resistant layer is a rubber sleeve and a steel wire mesh embedded in the rubber sleeve. The wear-resistant layer has V-shaped bodies symmetrically distributed at both ends. The two V-shaped bodies at the left and right ends are connected to each other with an end vertical wall. The other end forms a connecting outer V-groove with the adjacent V-shaped body. The tensile inner layer and the outer sheath have connecting outer V-grooves at both ends and end vertical walls at both ends.

[0014] Preferably, the tensile inner layer is an aramid sheath, and the outer sheath is a wear-resistant rubber outer layer; the cable core consists of a core and an insulating shielding layer covering the core.

[0015] As can be seen from the above solutions, this application provides a high-strength cable for elevators, which has the following beneficial effects: 1. The elastic limiter, through its elasticity, deforms when the high-strength cable used in the elevator is subjected to external force, thereby transferring the external force directly to the cable core. This not only improves the structural strength of the high-strength cable used in the elevator but also effectively alleviates external pressure. 2. The corresponding cable cores are wrapped and protected by the V-shaped groove at the bottom of the arc and the groove at the bottom of the large arc to effectively relieve the pressure applied by the outside when the elastic limiter is deformed under pressure, thereby significantly reducing the pressure on the cable cores. 3. When subjected to external pressure, the high-strength compressive-resistant arc-shaped body at the end of the elastic support part will first elastically deform towards one side of the arc-shaped V-groove. Since the structure of the high-strength compressive-resistant arc-shaped body is larger than that of the other end, it will form resistance with the fireproof and high-temperature resistant layer. While transferring the pressure, it reduces the deformation space to avoid adverse effects on the cable core. This allows the high-strength cable used in elevators to significantly improve structural strength while relieving external pressure, thereby effectively extending its service life. 4. By using the pressure-resistant arc groove to provide space for bending deformation when the elastic limiting body is under pressure, the pressure is decomposed and released to the surroundings while forming an arc shape, thereby significantly reducing the pressure on the high-strength cable used in elevators. 5. By orderly arranging multiple cable cores within the large arc-bottom groove, mutual interference between multiple cable cores is avoided, and a stable connection structure is maintained under the limiting support of the elastic limiting body. 6. Pressure is released and relieved by the pressure relief chamber and the elastic support part working together with the high-strength pressure-resistant arc body. This guides the elastic deformation path of the high-strength pressure-resistant arc body while preventing pressure from acting directly on the cable core. This allows the high-strength cable used in elevators to significantly improve structural strength while relieving external pressure. 7. When the high-strength adhesive layer is obtained after coating, radiation or thermal cross-linking, the matrix resin and the modified resin cross-link with each other to form a dense three-dimensional mesh structure. This connects the fireproof and high-temperature resistant layer and the wear-resistant layer, and forms a high-strength and dense connection structure between the fireproof and high-temperature resistant layer and the wear-resistant layer on the arc-shaped surface, thereby significantly improving the structural strength of the high-strength cable used in elevators. 8. The deformation cavity provides deformation space, and the connecting outer V-groove and V-body form a multi-triangular structure while cooperating with each other. This significantly improves the structural strength of the high-strength cable used in elevators, while effectively decomposing and relieving pressure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of the high-strength cable for elevators disclosed in this application; Figure 2 This is a partial structural diagram of the elastic limiting body disclosed in this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Cable core; 11. Core; 12. Insulation shielding layer; 2. Elastic limiting body; 21. Elastic support part; 211. High-strength pressure-resistant arc-shaped body; 212. Pressure-resistant arc-shaped groove; 22. Arc-bottom V-shaped groove; 23. Large arc-bottom groove; 3. Fireproof and high-temperature resistant layer; 31. Side protrusion; 311. Pressure relief cavity; 32. Arc-shaped protrusion; 4. High-strength adhesive layer; 5. Wear-resistant layer; 51. V-shaped body; 511. Deformation cavity; 52. End vertical wall; 53. Connecting outer V-shaped groove; 6. Tensile inner layer; 7. Outer sheath layer. Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The following will provide a detailed description of the high-strength cable for elevators as described in this application.

[0021] like Figure 1 As shown, a high-strength cable for elevators includes multiple cable cores 1 and an outer sheath 7 for covering the cable cores 1. Each cable core 1 consists of a conductor 11 and an insulating shielding layer 12 covering the conductor 11. An elastic limiting body 2 is provided inside the outer sheath 7, and a fire-resistant and high-temperature-resistant layer 3, a high-strength adhesive layer 4, a wear-resistant layer 5, and a tensile-resistant inner layer 6 are sequentially wrapped around the cable cores 1 and the elastic limiting body 2.

[0022] It should be mentioned that the cross-section of the elastic limiting body 2 is X-shaped and has four elastic support portions 21. An arc-bottomed V-shaped groove 22 is formed between the two corresponding elastic support portions 21 located at the left and right ends, and a large arc-bottomed groove 23 is formed between the two corresponding elastic support portions 21 located at the upper and lower ends. It should be noted that multiple cable cores 1 are respectively located in the corresponding arc-bottomed V-shaped groove 22 and large arc-bottomed groove 23.

[0023] Meanwhile, the V-shaped groove 22 with an arc bottom in this application is bullet-shaped, with an arc bottom and a gradually increasing vertical distance from the bottom to the other end, while the increasing arc gradually decreases. The height from the bottom to the other end of the large arc-bottom groove 23 is greater than or equal to the diameter of the cable and less than four times the diameter of the cable. When the bullet-shaped V-shaped groove 22 is subjected to external pressure, the high-strength pressure-resistant arc-shaped body 211 at the end of the elastic support 21 will first elastically deform towards one side of the V-shaped groove 22. Since the structure of the high-strength pressure-resistant arc-shaped body 211 is larger than that at the other end, it will form resistance with the fireproof and high-temperature resistant layer 3. While transferring the pressure, it reduces the deformation space to avoid adverse effects on the cable core 1. This allows the high-strength cable for elevators to significantly improve structural strength while relieving external pressure, thereby effectively extending its service life. Therefore, the elastic limiter 2, when subjected to external force, transfers the external force directly to the cable core 1 through deformation, thereby improving the structural strength of the high-strength cable and effectively relieving external pressure. The cable core 1 is also wrapped and protected by the arc-bottom V-groove 22 and the large arc-bottom groove 23, which effectively relieves the external pressure when the elastic limiter 2 is deformed under pressure, thus significantly reducing the pressure on the cable core 1.

[0024] like Figure 1 As shown, multiple cable cores 1 are located within the corresponding large arc-bottom groove 23, with the cable core 1 in the middle position close to the bottom of the large arc-bottom groove 23. Correspondingly, an even number of cable cores 1 are symmetrically distributed at both ends of the cable core 1 in the middle position, and the vertical distance from the cable core 1 farther from the middle position to the bottom of the large arc-bottom groove 23 is greater; and at least one cable core 1 is located at the end of the arc-bottom V-shaped groove 22 near the bottom. Meanwhile, the fire-resistant and high-temperature resistant layer 3 consists of two side protrusions 31 located at the left and right ends respectively and two arc-shaped protrusions 32 located at the top and bottom ends respectively. Adjacent side protrusions 31 and arc-shaped protrusions 32 are interconnected, and a pressure relief cavity 311 is provided within the fire-resistant and high-temperature resistant layer 3 at the end of the arc-bottom V-shaped groove 22 furthest from the bottom. A high-strength pressure-resistant arc-shaped body 211 is provided at the end of the elastic support 21, and part of the pressure relief cavity 311 is located between the two high-strength pressure-resistant arc-shaped bodies 211 at the corresponding end. Therefore, the high-strength cable for elevators releases and alleviates pressure by cooperating with the pressure relief chamber 311, the elastic support part 21, and the high-strength pressure-resistant arc-shaped body 211. This guides the elastic deformation path of the high-strength pressure-resistant arc-shaped body 211 while preventing pressure from acting directly on the cable core 1. This allows the high-strength cable for elevators to significantly improve structural strength while alleviating external pressure.

[0025] like Figure 2 As shown, the elastic limiting body 2 is provided with multiple high-strength compressive-resistant arc-shaped bodies 211 spaced apart on the left and right ends, and compressive-resistant arc-shaped grooves 212 facing away from each other. The compressive-resistant arc-shaped grooves 212 provide space for bending deformation when the elastic limiting body 2 is compressed, so as to decompose the pressure and release it to all sides while forming an arc shape, thereby significantly reducing the compressive pressure of the high-strength cable used in the elevator.

[0026] It should be noted that the high-strength adhesive layer 4 is obtained by mixing and casting a base resin, modified resin, organic peroxide and coupling agent to form a preform film, and then by coating, radiation or thermal crosslinking.

[0027] The matrix resin, modified resin, organic peroxide and coupling agent are in the following weight ratio: 1-20: 10-50: 0.1-2: 0.1-2.

[0028] The modified resin is an ethylene containing at least one first active group and a second active group, mixed with one or more of methyl acrylate, methyl methacrylate, 1,4-pentadiene, dicyclopentadiene, and 1,4-hexadiene in any proportion. The first active group is a halogen, aldehyde, sulfonic acid, epoxy, cyano, or isocyanate group, and the second active group is an amino, carboxyl, or hydroxyl group.

[0029] Meanwhile, the matrix resin is one or more of the copolymers of ethylene and vinyl acetate, propylene, butene, pentene, hexene or octene mixed in any proportion, with a melting point of 40-90℃ and a melt index of 2-25 g / 10min.

[0030] The organic peroxide is at least one of bis(1-octoxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate, vinyltriperoxide tert-butylsilane, 2,5-dimethyl-2,5-(bis-tert-butylperoxy)hexane, tert-butyl peroxide 3,3,5-trimethylhexanoate, ethyl 3,3-bis(tert-amylperoxy)butyrate, lauric acid peroxide, and 1,1-bis(tert-amylperoxy)cyclohexane.

[0031] The coupling agent is a silane coupling agent.

[0032] Therefore, when the high-strength adhesive layer 4 is obtained through coating, radiation or thermal cross-linking, the matrix resin and the modified resin cross-link with each other to form a dense three-dimensional mesh structure. This connects the fireproof and high-temperature resistant layer 3 and the wear-resistant layer 5, and the fireproof and high-temperature resistant layer 3 with the arc-shaped surface of the wear-resistant layer 5 forms a high-strength and dense connection structure, thereby significantly improving the structural strength of the high-strength cable used in elevators.

[0033] like Figure 1As shown, the wear-resistant layer 5 consists of a rubber sheath and a steel wire mesh embedded within the rubber sheath. V-shaped bodies 51 are symmetrically distributed at both ends of the wear-resistant layer 5. One end of the two V-shaped bodies 51 at the left and right ends is connected to each other, with an end vertical wall 52 at one end. The other end forms a connecting outer V-groove with the adjacent V-shaped body 51. Similarly, the tensile inner layer 6 and the outer sheath layer 7 both have connecting outer V-grooves at their top and bottom ends, and end vertical walls 52 at their left and right ends. The tensile inner layer 6 is an aramid sheath, and the outer sheath layer 7 is a wear-resistant rubber outer layer. Therefore, the deformation cavity 511 provides deformation space, and the connecting outer V-groove 53 and the V-shaped bodies 51, while cooperating, form a multi-triangular structure, thus significantly improving the structural strength of the high-strength cable used in elevators while effectively dispersing and relieving pressure. Example

[0034] like Figure 1 As shown, a high-strength cable for elevators includes multiple cable cores 1 and an outer sheath 7 for covering the cable cores 1. Each cable core 1 consists of a conductor 11 and an insulating shielding layer 12 covering the conductor 11. An elastic limiting body 2 is provided inside the outer sheath 7, and a fire-resistant and high-temperature-resistant layer 3, a high-strength adhesive layer 4, a wear-resistant layer 5, and a tensile-resistant inner layer 6 are sequentially wrapped around the cable cores 1 and the elastic limiting body 2.

[0035] It should be mentioned that the cross-section of the elastic limiting body 2 is X-shaped and has four elastic support portions 21. An arc-bottomed V-shaped groove 22 is formed between the two corresponding elastic support portions 21 located at the left and right ends, and a large arc-bottomed groove 23 is formed between the two corresponding elastic support portions 21 located at the upper and lower ends. It should be noted that multiple cable cores 1 are respectively located in the corresponding arc-bottomed V-shaped groove 22 and large arc-bottomed groove 23.

[0036] Meanwhile, the V-shaped groove 22 with an arc bottom in this application is bullet-shaped, with an arc bottom and a gradually increasing vertical distance from the bottom to the other end, while the increasing arc gradually decreases. The height from the bottom to the other end of the large arc-bottom groove 23 is greater than or equal to the diameter of the cable and less than four times the diameter of the cable. When the bullet-shaped V-shaped groove 22 is subjected to external pressure, the high-strength pressure-resistant arc-shaped body 211 at the end of the elastic support 21 will first elastically deform towards one side of the V-shaped groove 22. Since the structure of the high-strength pressure-resistant arc-shaped body 211 is larger than that at the other end, it will form resistance with the fireproof and high-temperature resistant layer 3. While transferring the pressure, it reduces the deformation space to avoid adverse effects on the cable core 1. This allows the high-strength cable for elevators to significantly improve structural strength while relieving external pressure, thereby effectively extending its service life. Therefore, the elastic limiter 2, when subjected to external force, transfers the external force directly to the cable core 1 through deformation, thereby improving the structural strength of the high-strength cable and effectively relieving external pressure. The cable core 1 is also wrapped and protected by the arc-bottom V-groove 22 and the large arc-bottom groove 23, which effectively relieves the external pressure when the elastic limiter 2 is deformed under pressure, thus significantly reducing the pressure on the cable core 1.

[0037] like Figure 1 As shown, multiple cable cores 1 are located within the corresponding large arc-bottom groove 23, with the cable core 1 in the middle position close to the bottom of the large arc-bottom groove 23. Correspondingly, an even number of cable cores 1 are symmetrically distributed at both ends of the cable core 1 in the middle position, and the vertical distance from the cable core 1 farther from the middle position to the bottom of the large arc-bottom groove 23 is greater; and at least one cable core 1 is located at the end of the arc-bottom V-shaped groove 22 near the bottom. Meanwhile, the fire-resistant and high-temperature resistant layer 3 consists of two side protrusions 31 located at the left and right ends respectively and two arc-shaped protrusions 32 located at the top and bottom ends respectively. Adjacent side protrusions 31 and arc-shaped protrusions 32 are interconnected, and a pressure relief cavity 311 is provided within the fire-resistant and high-temperature resistant layer 3 at the end of the arc-bottom V-shaped groove 22 furthest from the bottom. A high-strength pressure-resistant arc-shaped body 211 is provided at the end of the elastic support 21, and part of the pressure relief cavity 311 is located between the two high-strength pressure-resistant arc-shaped bodies 211 at the corresponding end. Therefore, the high-strength cable for elevators releases and alleviates pressure by cooperating with the pressure relief chamber 311, the elastic support part 21, and the high-strength pressure-resistant arc-shaped body 211. This guides the elastic deformation path of the high-strength pressure-resistant arc-shaped body 211 while preventing pressure from acting directly on the cable core 1. This allows the high-strength cable for elevators to significantly improve structural strength while alleviating external pressure.

[0038] like Figure 2 As shown, the elastic limiting body 2 is provided with multiple high-strength compressive-resistant arc-shaped bodies 211 spaced apart on the left and right ends, and compressive-resistant arc-shaped grooves 212 facing away from each other. The compressive-resistant arc-shaped grooves 212 provide space for bending deformation when the elastic limiting body 2 is compressed, so as to decompose the pressure and release it to all sides while forming an arc shape, thereby significantly reducing the compressive pressure of the high-strength cable used in the elevator.

[0039] It should be noted that the high-strength adhesive layer 4 is obtained by mixing and casting a base resin, modified resin, organic peroxide and silane coupling agent to form a preform film, which is then coated, irradiated or thermally crosslinked.

[0040] The matrix resin, modified resin, organic peroxide and silane coupling agent are in a weight ratio of 10:10:0.2:0.2.

[0041] The modified resin is a mixture of ethylene containing one first active group and two second active groups with methyl methacrylate in a molar ratio of 1:1. The first active group is an epoxy group, and the second active groups are amino and hydroxyl groups.

[0042] Meanwhile, the matrix resin is a mixture of ethylene, pentene, and hexene in a molar ratio of 1:2.3:1.

[0043] The organic peroxide is at least one of bis(1-octoxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate, vinyltriperoxide tert-butylsilane, 2,5-dimethyl-2,5-(bis-tert-butylperoxy)hexane, tert-butyl peroxide 3,3,5-trimethylhexanoate, ethyl 3,3-bis(tert-amylperoxy)butyrate, lauric acid peroxide, and 1,1-bis(tert-amylperoxy)cyclohexane.

[0044] Therefore, when the high-strength adhesive layer 4 is obtained through coating, radiation or thermal cross-linking, the matrix resin and the modified resin cross-link with each other to form a dense three-dimensional mesh structure. This connects the fireproof and high-temperature resistant layer 3 and the wear-resistant layer 5, and the fireproof and high-temperature resistant layer 3 with the arc-shaped surface of the wear-resistant layer 5 forms a high-strength and dense connection structure, thereby significantly improving the structural strength of the high-strength cable used in elevators.

[0045] like Figure 1 As shown, the wear-resistant layer 5 consists of a rubber sheath and a steel wire mesh embedded within the rubber sheath. V-shaped bodies 51 are symmetrically distributed at both ends of the wear-resistant layer 5. One end of the two V-shaped bodies 51 at the left and right ends is connected to each other, with an end vertical wall 52 at one end. The other end forms a connecting outer V-groove with the adjacent V-shaped body 51. Similarly, the tensile inner layer 6 and the outer sheath layer 7 both have connecting outer V-grooves at their top and bottom ends, and end vertical walls 52 at their left and right ends. The tensile inner layer 6 is an aramid sheath, and the outer sheath layer 7 is a wear-resistant rubber outer layer. Therefore, the deformation cavity 511 provides deformation space, and the connecting outer V-groove 53 and the V-shaped bodies 51, while cooperating, form a multi-triangular structure, thus significantly improving the structural strength of the high-strength cable used in elevators while effectively dispersing and relieving pressure. Example

[0046] The difference between Example 2 and Example 1 is that the base resin, modified resin, organic peroxide and silane coupling agent in Example 2 are in a weight ratio of 1:50:2:0.1. Example

[0047] The difference between Example 3 and Example 1 is that the base resin, modified resin, organic peroxide and silane coupling agent in Example 3 are in a weight ratio of 20:25:0.1:2. Example

[0048] The difference between Example 4 and Example 1 is that the modified resin in Example 4 is a mixture of ethylene containing a first active group and a second active group, methyl methacrylate, and dicyclopentadiene in a molar ratio of 6:1:2. Furthermore, the first active group is a halogen, and the second active group is a hydroxyl group. The matrix resin is a mixture of ethylene and vinyl acetate in a molar ratio of 4:1. The organic peroxide is bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacic acid ester. Example

[0049] The difference between Example 5 and Example 1 is that the modified resin in Example 5 is a mixture of ethylene with two first active groups and one second active group and 1,4-hexadiene in a molar ratio of 3:1. Furthermore, the first active group is an aldehyde and a cyano group, and the second active group is an amino group. The organic peroxide is 2,5-dimethyl-2,5-(bis-tert-butadiene)hexane.

[0050] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not have a high-strength adhesive layer 4.

[0051] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that Comparative Example 2 does not have an elastic limiting body 2.

[0052] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the elastic limiting body 2 in Comparative Example 3 is I-shaped.

[0053] Performance testing The tensile strength and elongation at break of the high-strength cables used in elevators in Examples 1 to 5 above were tested according to the methods required by GB / T 10401-2006. The test results are shown in the table below: Table 1 Performance test results of Examples 1 to 5 In summary, this application provides a high-strength cable for elevators. This high-strength cable arranges multiple cable cores 1 within a large arc-bottom groove 23 in an orderly manner, thereby preventing mutual interference between the multiple cable cores 1 and maintaining a stable connection structure under the limiting support of the elastic limiting body 2. When the high-strength cable is subjected to external force, the deformation transfers the force directly acting on the cable cores 1, thus improving the structural strength of the high-strength cable and effectively alleviating external pressure. Furthermore, the arc-bottom V-groove 22 and the large arc-bottom groove 23 wrap and protect the corresponding cable cores 1, effectively mitigating external pressure when the elastic limiting body 2 is deformed under pressure, thereby significantly reducing the compressive stress on the cable cores 1.

[0054] The terms “first,” “second,” “third,” “fourth,” etc., used in this application (if applicable) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, or apparatus.

[0055] It should be noted that the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0056] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A high-strength cable for elevators, comprising multiple cable cores (1) and a sheath outer layer (7) for covering the cable cores (1), wherein an elastic limiting body (2) is provided on the inner side of the sheath outer layer (7), characterized in that: The cross-section of the elastic limiting body (2) is X-shaped and has four elastic support parts (21). An arc-bottom V-shaped groove (22) is formed between two corresponding elastic support parts (21) located at the left and right ends, and a large arc-bottom groove (23) is formed between two corresponding elastic support parts (21) located at the upper and lower ends. Multiple cable cores (1) are respectively located in the corresponding arc-bottom V-shaped groove (22) and the large arc-bottom groove (23). The arc-bottom V-shaped groove (22) is bullet-shaped and has an arc-shaped bottom. The vertical distance from the bottom to the other end gradually increases, and the arc of the increase gradually decreases. The height from the bottom to the other end of the large arc-bottom groove (23) is greater than or equal to the diameter of the cable and less than four times the diameter of the cable.

2. The high-strength cable for elevators according to claim 1, characterized in that: Multiple cable cores (1) are located within the corresponding large arc-bottom groove (23), and the cable cores (1) located in the middle part are close to the bottom of the large arc-bottom groove (23). An even number of cable cores (1) are symmetrically distributed at both ends of the cable cores (1) located in the middle part. The vertical distance from the cable core (1) located further away from the cable core (1) located in the middle part to the bottom of the large arc-bottom groove (23) is greater. At least one cable core (1) is located at one end of the arc-bottom V-groove (22) near the bottom.

3. A high-strength cable for elevators according to claim 2, characterized in that: The cable core (1) and the elastic limiting body (2) are wrapped with a fireproof and high-temperature resistant layer (3); the fireproof and high-temperature resistant layer (3) consists of two side protrusions (31) located at the left and right ends respectively and two arc-shaped protrusions (32) located at the top and bottom ends respectively. The adjacent side protrusions (31) and arc-shaped protrusions (32) are connected to each other, and a pressure relief cavity (311) located at the end of the arc bottom V-shaped groove (22) away from the bottom is provided in the fireproof and high-temperature resistant layer (3).

4. A high-strength cable for elevators according to claim 3, characterized in that: The end of the elastic support (21) is provided with a high-strength pressure-resistant arc-shaped body (211), and part of the pressure relief cavity (311) is located between the two high-strength pressure-resistant arc-shaped bodies (211) at the corresponding end.

5. A high-strength cable for elevators according to claim 4, characterized in that: The elastic limiting body (2) is provided with multiple compression-resistant arc grooves (212) of the two high-strength compression-resistant arc bodies (211) that are spaced apart on the left and right ends and are opposite to each other.

6. A high-strength cable for elevators according to claim 3, characterized in that: The fireproof and high-temperature resistant layer (3) is provided with a high-strength adhesive layer (4), a wear-resistant layer (5), a tensile inner layer (6) and a sheath outer layer (7) in sequence on the outside.

7. A high-strength cable for elevators according to claim 6, characterized in that: The high-strength adhesive layer (4) is obtained by mixing and casting a base resin, modified resin, organic peroxide and coupling agent to form a preform film, and then coating, irradiating or thermally crosslinking it; the base resin, modified resin, organic peroxide and coupling agent are in a weight ratio of 1-20:10-50:0.1-2:0.1-2; the modified resin is ethylene containing at least one first active group and a second active group, mixed with one or more of methyl acrylate, methyl methacrylate, 1,4-pentadiene, dicyclopentadiene and 1,4-hexadiene in any ratio; wherein the first active group is halogen, aldehyde, sulfonic acid, epoxy, cyano, isocyanate; the second active group is amino, carboxyl or hydroxyl.

8. A high-strength cable for elevators according to claim 7, characterized in that: The matrix resin is one or more of the copolymers of ethylene and vinyl acetate, propylene, butene, pentene, hexene, or octene mixed in any proportion, with a melting point of 40-90℃ and a melt index of 2-25 g / 10 min; the organic peroxide is at least one of bis(1-octoxy-2,2,6,6-tetramethyl-4-piperidinyl)sepiacetate, vinyltriperoxide tert-butylsilane, 2,5-dimethyl-2,5-(bis-tert-butylperoxy)hexane, tert-butyl peroxide 3,3,5-trimethylhexanoate, ethyl 3,3-bis(tert-amylperoxy)butanoate, lauric acid peroxide, and 1,1-bis(tert-amylperoxy)cyclohexane; the coupling agent is a silane coupling agent.

9. A high-strength cable for elevators according to claim 6, characterized in that: The wear-resistant layer (5) consists of a rubber sleeve and a wire mesh embedded in the rubber sleeve. Both ends of the wear-resistant layer (5) are provided with V-shaped bodies (51) symmetrically distributed vertically. The two V-shaped bodies (51) located at the left and right ends are connected to each other with an end vertical wall (52) at one end and a connecting outer V groove formed with the adjacent V-shaped body (51) at the other end. Both the upper and lower ends of the tensile inner layer (6) and the outer sheath layer (7) are provided with connecting outer V grooves, and both the left and right ends are provided with end vertical walls (52).

10. A high-strength cable for elevators according to claim 6, characterized in that: The tensile inner layer (6) is an aramid sheath, and the outer sheath layer (7) is a wear-resistant rubber outer layer; the cable core (1) consists of a core (11) and an insulating shielding layer (12) covering the core (11).

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