A rope saddle support structure and a replacement method based on the support structure

Abstract

The application discloses a cable saddle supporting structure and a replacement method based on the supporting structure. The supporting structure is arranged between a saddle head and a base of a cable saddle. The supporting structure has at least two pairs of sliding fitting units which are transversely arranged in parallel with respect to the extension direction of a main cable. Each pair of the sliding fitting units is composed of a bottom side sliding plate and a top side sliding plate which are slidingly fitted in a spherical cap shape. The application can realize convenient, easy and efficient replacement of the cable saddle supporting structure, and can form reliable limiting support of the saddle head on the base.

Description

TECHNICAL FIELD

[0001] The present application relates to a cable saddle structure of a suspension bridge, in particular to a cable saddle supporting structure and a replacement method based on the supporting structure. BACKGROUND

[0002] In the suspension bridge engineering structure, in order to adapt to the load change on the main cable, the saddle head of the cable saddle, especially the saddle head of the spreader saddle, needs to swing along the extension direction of the main cable (i.e. the longitudinal direction) relative to the base.

[0003] Chinese patent documents disclose a structure in which the saddle head swings along the extension direction of the main cable relative to the base, for example, see patent documents entitled "A spreader saddle structure for a bridge" (publication number CN 101899814, publication date December 01, 2010), "Bridge main cable saddle support with limiting adjustment function" (publication number CN 207512603, publication date June 19, 2018), "Intelligent monitoring type bridge spreader saddle support" (publication number CN 211228076, publication date August 11, 2020) and the like. These technologies are to set a cylindrical sliding cooperation upper support and a cylindrical sliding plate between the saddle head and the base, the bottom surface of the upper support has an inner concave arc structure bottom side rotating sliding surface corresponding to the extension direction of the main cable, the top surface of the cylindrical sliding plate has an outer convex arc structure top side rotating sliding surface corresponding to the extension direction of the main cable, the bottom side rotating sliding surface and the top side rotating sliding surface form a cylindrical sliding cooperation, the cable saddle can only swing along the extension direction of the main cable on the base, and cannot swing in the transverse direction relative to the extension direction of the main cable on the base. In the state that any one of the upper support, the cylindrical sliding plate and / or the lower support is damaged, the saddle head can only be lifted as a whole from the base to be replaced, which has great difficulty in replacement and is not conducive to the maintenance of the suspension bridge engineering structure. In addition, the transverse limiting of the saddle head on the base of the aforementioned cylindrical sliding cooperation structure is realized by the vertical pressure of the saddle head gravity and the load carried on the cylindrical sliding plate, and the cylindrical sliding plate itself does not have the function of restricting and limiting the transverse swinging action of the saddle head, so the reliability is poor. SUMMARY

[0004] The technical purpose of the present application is to provide a cable saddle supporting structure which can not only realize convenient, easy and efficient replacement of the cable saddle supporting structure, but also form reliable limiting support of the saddle head on the base, and a replacement method based on the supporting structure, in view of the particularity of the swinging of the saddle head relative to the base of the cable saddle and the deficiencies of the prior art.

[0005] The technical purpose of the present application is achieved by the following technical solution: a cable saddle supporting structure arranged between the saddle head and the base of the cable saddle, the supporting structure having at least two pairs of sliding fitting units transversely arranged side by side relative to the extension direction of the main cable, each pair of sliding fitting units being composed of a bottom side sliding plate and a top side sliding plate in spherical cap sliding fitting. This technical measure uses the spherical cap sliding fitting universal property to form a plurality of side-by-side structures to reliably assemble and support the saddle head on the base, which can significantly achieve the following three technical effects:

[0006] First, through the plurality of side-by-side sliding fitting units, the swing of the saddle head on the base can only be an axial rotation action around the connecting line of the spherical center of each pair of spherical cap sliding fitting units, and the saddle head can reliably swing on the base relative to the extension direction of the main cable, i.e., the technical effect of cylindrical sliding fitting is reliably achieved.

[0007] Second, when the saddle head gravity (and the load carried) acts on each pair of sliding fitting units, the concave-convex fitting structure between each pair of sliding fitting units can reliably constrain and limit the saddle head on the base, and the horizontal swing action relative to the extension direction of the main cable does not occur, and the supporting stability of the saddle head on the base is excellent, which is a technical effect that cylindrical sliding fitting cannot achieve.

[0008] Third, when any pair of sliding fitting units is damaged, by lifting the saddle head on the damaged side, the currently serving sliding fitting unit will slightly horizontally swing relative to the extension direction of the main cable, and the damaged sliding fitting unit is unloaded, thereby facilitating efficient and easy disassembly of the damaged sliding fitting unit, without the need to lift the entire saddle head, the operation convenience is excellent, the damaged sliding fitting unit can be reliably replaced, which is also a technical effect that cylindrical sliding fitting cannot achieve.

[0009] As one of the preferred solutions, the supporting structure has two pairs of sliding fitting units transversely arranged side by side relative to the extension direction of the main cable, and the two pairs of sliding fitting units are symmetrically arranged left and right along the side-by-side butt joint center line. This technical measure can not only reliably achieve the stable supporting effect of the saddle head, but also ensure that the saddle head stably swings on the base relative to the extension direction of the main cable, and is also convenient for assembly operation between the saddle head and the base and subsequent replacement and maintenance operation.

[0010] As one of the preferred solutions, the bottom side sliding plate and / or the top side sliding plate of the sliding fitting unit has a friction-reducing sliding plate layer with a spherical cap sliding fitting surface. This technical measure is conducive to ensuring that the spherical cap sliding fitting technical effect is stably and reliably achieved.

[0011] As one of the preferred solutions, the bottom side sliding plate of the sliding fitting unit is slidingly fitted with the bottom surface, and the top surface of the bottom side sliding plate has a convex top side rotating sliding surface in the shape of a spherical cap; the top side sliding plate of the sliding fitting unit is fixedly fitted with the top surface of the saddle head, and the bottom surface of the top side sliding plate has a concave bottom side rotating sliding surface in the shape of a spherical cap, and the bottom side rotating sliding surface and the top side rotating sliding surface of the sliding fitting unit are in concave-convex sliding fitting in the shape of a spherical cap. This technical measure is conducive to ensuring that the saddle head stably swings relative to the extension direction of the main cable on the base.

[0012] Further, the bottom surface of the bottom side sliding plate of the sliding fitting unit is a bottom side translational sliding surface, the bottom side translational sliding surface and the top surface of the base are in planar sliding fitting, and at least one guide rail and sliding groove pair that is in longitudinal sliding fitting relative to the extension direction of the main cable is arranged therebetween. Still further, the guide rail and sliding groove pair is composed of a translational sliding rail that is convex on the top surface of the base and a translational sliding groove that is concave on the bottom side translational sliding surface of the bottom side sliding plate. Still further, the top surface of the base and the surface of the translational sliding rail have a friction-reducing sliding plate layer, and the bottom side translational sliding surface of the bottom side sliding plate and the surface of the translational sliding groove have a friction-reducing sliding plate layer. This technical measure enables the bottom side sliding plate of the sliding fitting unit to stably and reliably perform translational sliding relative to the extension direction of the main cable on the base, without sliding deviation and with small sliding frictional resistance.

[0013] Further, the top surface of the top side sliding plate of the sliding fitting unit is a top side mounting surface, and the top side sliding plate is fixedly fitted to the bottom surface of the saddle head in a detachable connection structure. This technical measure not only enables the top side sliding plate of the sliding fitting unit to be stably connected and fixed to the bottom of the saddle head, but also enables the top side sliding plate of the sliding fitting unit to be easily detached and replaced on the bottom of the saddle head.

[0014] Further, the base has skirt plates that are convex upward on the two lateral sides, the two lateral skirt plates enclose a space on the top surface of the base for arranging the sliding fitting unit, and the inner wall surface of each lateral skirt plate and the corresponding wall surface of the sliding fitting unit are in gap fitting, and the top surface of each lateral skirt plate and the corresponding bottom surface of the top side sliding plate above are in gap fitting. This technical measure effectively ensures that the sliding fitting unit is stably fitted on the base and also effectively ensures that the sliding fitting unit performs the sliding fitting action and the translational sliding action in the shape of a spherical cap.

[0015] A replacement method based on the above cable saddle support structure, comprising the following technical measures:

[0016] - lifting the saddle head at one side of the sliding fitting unit that needs to be replaced, and enabling the self weight and load of the saddle head to act on the currently serving sliding fitting unit and the lifting structure through the sliding fitting in the shape of a spherical cap of the currently serving sliding fitting unit;

[0017] - dismounting the sliding fit unit currently in need of replacement;

[0018] - assembling a new sliding fit unit at the original position of the dismounted sliding fit unit;

[0019] - dismounting the lifting structure, so that the self weight and load of the saddle head act on each sliding fit unit in the transverse direction.

[0020] The technical measure is based on the universal characteristics of the spherical cap sliding fit action of the above-mentioned support structure, when any pair of sliding fit units is damaged, the current service sliding fit unit will slightly swing in the transverse direction relative to the extension direction of the main cable by lifting the saddle head on the damaged side, so as to unload the damaged sliding fit unit, thereby efficiently and easily dismounting the damaged sliding fit unit without lifting the whole saddle head, which is easy, convenient and efficient, and is beneficial to the maintenance of the suspension bridge engineering structure.

[0021] The beneficial technical effects of the present application are that the above-mentioned technical measure utilizes the universal characteristics of the spherical cap sliding fit to form a plurality of pairs of parallel structures to reliably assemble and support the saddle head on the base, which can obviously achieve the following three technical effects:

[0022] First, through a plurality of pairs of parallel sliding fit units, the swing of the saddle head on the base can only be axial rotation around the connecting line of the spherical centers of each pair of spherical cap sliding fit, and the saddle head can reliably swing on the base relative to the extension direction of the main cable, that is, the technical effect of cylindrical sliding fit is reliably achieved.

[0023] Second, when the gravity of the saddle head (and the load carried) acts on each pair of sliding fit units, the concave-convex fit structure between each pair of sliding fit units can reliably constrain and position the saddle head on the base, and the swing action in the transverse direction relative to the extension direction of the main cable will not occur, and the support stability of the saddle head on the base is excellent, which is a technical effect that cylindrical sliding fit cannot achieve.

[0024] Third, when any pair of sliding fit units is damaged, the current service sliding fit unit will slightly swing in the transverse direction relative to the extension direction of the main cable by lifting the saddle head on the damaged side, thereby unloading the damaged sliding fit unit, so as to facilitate efficient and easy dismounting of the damaged sliding fit unit without lifting the whole saddle head, which is excellent in operation convenience, can reliably replace the damaged sliding fit unit, and is beneficial to the maintenance of the suspension bridge engineering structure, which is also a technical effect that cylindrical sliding fit cannot achieve. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the present application.

[0026] Figure 2 isFigure 1 Figure 2 is an exploded view of the structure shown in Figure 1 from the top.

[0027] Figure 3 Figure 3 is a perspective view of the structure shown in Figure 1. Figure 1 Figure 4 is a perspective view of the structure shown in Figure 1 from the bottom. Figure 2 Figure 5 is a perspective view of the structure shown in Figure 1 from the side. Figure 6 is a perspective view of the structure shown in Figure 1 from the top.

[0028] Figure 7 is a perspective view of the structure shown in Figure 1 from the bottom. Figure 4 Figure 8 is a perspective view of the structure shown in Figure 1 from the side. Figure 1 Figure 9 is a perspective view of the structure shown in Figure 1 from the top. Figure 2 Figure 10 is a perspective view of the structure shown in Figure 1 from the bottom. Figure 11 is a perspective view of the structure shown in Figure 1 from the side.

[0029] Figure 12 is a perspective view of the structure shown in Figure 1 from the top. DETAILED DESCRIPTION

[0030] The present application relates to a cable saddle structure of a suspension bridge, and in particular to a cable saddle support structure and a replacement method based on the support structure. The main technical content of the present application is described in detail below in multiple embodiments. Among them, the technical solution content of the present application is clearly and specifically explained in conjunction with the drawings of the specification, i.e. Figure 1 , Figure 2 , Figure 3 and Figure 4 Although the other embodiments do not have separate drawings, the main structure can still refer to the drawings of Embodiment 1.

[0031] It should be particularly noted that the drawings of the present application are schematic, and unnecessary details have been simplified in order to clearly illustrate the technical purpose of the present application, so as not to obscure the technical solution contributed by the present application to the prior art.

[0032] Embodiment 1

[0033] As shown in Figure 1 and Figure 2 , the present application is composed of two pairs of sliding fitting units arranged side by side. The structures of the two pairs of sliding fitting units are the same, and the detailed structure of one pair of sliding fitting units will be described below with reference to Figure 1 and Figure 2 .

[0034] The sliding fitting unit has a bottom side sliding plate 1 and a top side sliding plate 2.

[0035] Specifically, the bottom surface of the bottom slide plate 1 is a bottom translation sliding surface 12, which is a planar structure. A translation sliding groove 13 with a concave structure is formed in the center of the width of the bottom translation sliding surface 12 of the bottom slide plate 1 along the length direction. The aforementioned width direction of the bottom slide plate 1 corresponds to the transverse direction of the cable saddle when applied in the cable saddle structure, i.e., the transverse direction relative to the extension direction of the main cable supported by the cable saddle, and the same applies to the length direction of the bottom slide plate 1. In order to make the bottom slide plate 1 reliably and stably slide relative to the base in application, the surface of the bottom translation sliding surface 12 and the translation sliding groove 13 of the bottom slide plate 1 is provided with a friction-reducing slide plate layer, which can be a Teflon plate layer, a copper plate layer, or a friction-reducing composite plate layer, etc. In other words, the bottom translation sliding surface 12 of the bottom slide plate 1 has a friction-reducing slide plate layer with a translation sliding surface formed thereon.

[0036] The top surface of the bottom slide plate 1 has a top rotating sliding surface 11 with a spherical cap-shaped convexity. The spherical cap-shaped convexity means that the top rotating sliding surface 11 is convex in the length direction and the width direction of the bottom slide plate 1, and the width direction is additionally convex compared to the existing cylindrical convex structure. That is, the bottom slide plate 1 is equivalent to a spherical body structure, and the bottom translation sliding surface 12 is formed by cutting the bottom, and the top surface is a rectangular plate structure with a spherical cap-shaped convexity formed by cutting in the length direction and the width direction. In this way, the top rotating sliding surface 11 of the bottom slide plate 1 has substantially the same curvature in the width direction and the length direction, except that the chord length in the width direction is less than that in the length direction. In order to make the bottom slide plate 1 reliably and stably slide relative to the top slide plate 2 in application, the top rotating sliding surface 11 of the bottom slide plate 1 is provided with a friction-reducing slide plate layer, which can be a Teflon plate layer, a copper plate layer, or a friction-reducing composite plate layer, etc. In other words, the bottom slide plate 1 has a friction-reducing slide plate layer with a spherical cap-shaped sliding mating surface formed thereon.

[0037] The top surface of the top slide plate 2 is a top mounting surface 22, which is a planar structure. A plurality of bolt holes are provided at the non-side-by-side butt joint outer edge of the top slide plate 2, of course, the positions of these bolt holes should not affect the formation position of the bottom rotating sliding surface 21 described below.

[0038] The bottom surface of the top side sliding plate 2 has a spherical cap-shaped concave bottom side rotating sliding surface 21. The spherical cap-shaped concave refers to the bottom side rotating sliding surface 21 being concave in the length direction and the width direction of the top side sliding plate 2, and the concave in the width direction is added compared with the existing cylindrical concave structure. That is, the top side sliding plate 2 is equivalent to an inner hollow spherical body structure, and the bottom side rotating sliding surface 21 is formed by cutting the bottom of the inner hollow spherical body structure, and the length direction and the width direction are cut to form a rectangular plate body structure with a spherical cap-shaped concave bottom surface. In this way, the bottom side rotating sliding surface 21 of the top side sliding plate 1 has substantially the same curvature in the width direction and the length direction, except that the chord length in the width direction is less than the chord length in the length direction.

[0039] Of course, the bottom side rotating sliding surface 21 of the top side sliding plate 2 should be concave-convex matched with the top side rotating sliding surface 11 of the bottom side sliding plate 1. That is, the bottom side rotating sliding surface 21 of the top side sliding plate 2 should form a concave-convex matched spherical cap-shaped sliding fit structure with the top side rotating sliding surface 11 of the bottom side sliding plate 1.

[0040] In order to make the top side sliding plate 2 reliably and stably slide relative to the bottom side sliding plate 1 in application, a friction-reducing sliding plate layer is provided on the bottom side rotating sliding surface 21 of the top side sliding plate 2, which can be a four-fluorine plate layer, a copper plate layer, or a friction-reducing composite plate layer, etc. In other words, the top side sliding plate 2 has a friction-reducing sliding plate layer with a shaped spherical cap-shaped sliding fit surface.

[0041] Referring to Figure 3 and Figure 4 As shown, the base 4 of the cable saddle has upwardly protruding skirt plates 42 on both sides of the top width direction (i.e. transverse direction) of the base 4, and the space surrounded by the protrusions on the top surface of the base 4 is used to arrange the two pairs of sliding fit units. That is, the inner walls of the two side skirt plates 42 have a spacing slightly larger than the spacing between the outer walls of the two pairs of sliding fit units when arranged side by side. In addition, the protrusion height of the two side skirt plates 42 of the base 4 is greater than the thickness of the bottom side sliding plate 1 of the sliding fit unit, at least the thickness at the length direction ends of the bottom side sliding plate 1, and less than the height between the bottom side translation sliding surface 12 of the bottom side sliding plate 1 and the bottom end of the outer edge bolt hole of the top side sliding plate 2.

[0042] The top surface space of the base 4 is protruded to form two translation sliding rails 41, which correspond to the translation sliding grooves 13 of the bottom side sliding plate 1 of the two pairs of sliding fit units, and the forming direction of each translation sliding rail 41 is relative to the main cable extension direction, i.e. the longitudinal direction. In order to make the base 4 reliably and stably slide relative to the bottom side sliding plate 1 of the sliding fit unit in application, a friction-reducing sliding plate layer is provided on the surface of the translation sliding rail 41 in the top surface space of the base 4, which can be a four-fluorine plate layer, a copper plate layer, or a friction-reducing composite plate layer, etc. In other words, the top surface space of the base 4 has a friction-reducing sliding plate layer with a shaped translation sliding surface.

[0043] The bottom side sliding plate 1 of the two pairs of sliding fitting units is respectively slidably assembled on the corresponding translation sliding rail 41 in the top surface space of the base 4 through the respective translation sliding groove 13, that is, the bottom side translation sliding surface 12 of each bottom side sliding plate 1 is in plane sliding structure fitting with the top surface of the base 4, and the bottom side translation sliding surface 12 of each bottom side sliding plate 1 and the top surface of the base 4 form a longitudinal sliding fitting guide rail sliding groove pair through the matched translation sliding groove 13 and the translation sliding rail 41. In this way, the bottom side sliding plates 1 of the two pairs of sliding fitting units are transversely and side by side relative to the main cable extension direction in the top surface space of the base 4, and the bottom side sliding plates 1 of the two pairs of sliding fitting units are arranged in left-right symmetrical arrangement structure along the left-right butt joint center line; at the same time, the outer side wall surface of each bottom side sliding plate 1 is gap-fitted with the inner wall surface of the corresponding apron 42.

[0044] The top side sliding plate 2 of each of the two pairs of sliding fitting units is fixedly connected to the bottom of the saddle head 3 through the bolts passing through the bolt holes in the outer edge, the length direction of each top side sliding plate 2 corresponds to the extension direction of the main cable carried by the saddle head 3, that is, the top side mounting surface 22 of each top side sliding plate 2 is in butt joint fitting with the bottom surface of the saddle head 3, and the butt joint structure therebetween is detachably fixedly assembled and combined through bolt connection. The top side sliding plates 2 of the two pairs of sliding fitting units are seated on the corresponding bottom side sliding plate 1 below in a spherical cap surface sliding fitting structure, the outer edge of each top side sliding plate 2 is gap-fitted with the top end of the corresponding apron 42 below, and the top side sliding plates 2 of the two pairs of sliding fitting units are arranged in left-right symmetrical arrangement structure along the left-right butt joint center line.

[0045] As can be seen from the above structure, the bottom side sliding plate 1 and the top side sliding plate 2 of each sliding fitting unit of the present application are arranged between the saddle head 3 and the base 4 of the cable saddle, and the spherical cap sliding fitting structure between the bottom side sliding plate 1 and the top side sliding plate 2 can enable the saddle head 3 to perform a swinging action on the base 4 relative to the extension direction of the main cable, and the translation sliding fitting structure between the base 4 and the bottom side sliding plate 1 can enable the saddle head 3 to perform a translation sliding action on the base 4 relative to the extension direction of the main cable.

[0046] The replacement method of any sliding fitting unit based on the above structure after damage of the present application comprises the following technical measures:

[0047] determining the damaged sliding fitting unit;

[0048] lifting the saddle head 3 on the side of the sliding fitting unit that needs to be replaced (i.e., the damaged one) through a jack or other conventional lifting structure, enabling the self-weight and load of the saddle head 3 to act on the currently serving sliding fitting unit and the lifting structure through the spherical cap sliding fitting of the currently serving sliding fitting unit, and unloading the load on the damaged sliding fitting unit;

[0049] dismantling the sliding fitting unit that needs to be replaced;

[0050] - fitting a new sliding fit unit at the original position of the disassembled sliding fit unit;

[0051] - disassembling the lifting structure, so that the saddle head 3 is reseated on the two pairs of sliding fit units, i.e. the self-weight and load of the saddle head 3 jointly act on the transversely arranged sliding fit units; in this way, the replacement of the damaged sliding fit units constituting the support structure is realized.

[0052] Embodiment 2

[0053] The present application is composed of two pairs of sliding fit units arranged side by side, and the two pairs of sliding fit units are identical in structure. The detailed structure of one pair of sliding fit units is described below.

[0054] The sliding fit unit has a bottom side sliding plate and a top side sliding plate.

[0055] Specifically, the bottom surface of the bottom side sliding plate serves as a bottom side translational sliding surface, which is a planar structure. A translational sliding groove with an inner recess structure is formed at the center of the width of the bottom side translational sliding surface along the length direction, and the translational sliding groove is formed in a straight line type structure. In order to make the bottom side sliding plate slide reliably and stably relative to the base in application, the surface of the bottom side translational sliding surface and the translational sliding groove is provided with a friction-reducing sliding plate layer, which can be a tetrafluoro plate layer, a copper plate layer, a friction-reducing composite plate layer, etc. In other words, the bottom side translational sliding surface has a friction-reducing sliding plate layer with a formed translational sliding surface.

[0056] The top surface of the bottom side sliding plate has a top side rotational sliding surface with a spherical cap-shaped inner recess. The spherical cap-shaped inner recess refers to that the top side rotational sliding surface is recessed in the length direction and the width direction of the bottom side sliding plate, respectively, and compared with the existing cylindrical inner recess structure, the width direction is additionally recessed. That is, the bottom side sliding plate is equivalent to an inner hollow spherical body structure, and the top side rotational sliding surface is formed by cutting off the top part, and the length direction and the width direction are cut off to form a rectangular plate body structure with a spherical cap-shaped inner recess on the top surface. In this way, the curvature of the top side rotational sliding surface of the bottom side sliding plate in the width direction and the length direction is basically the same, except that the chord length in the width direction is smaller than that in the length direction. In order to make the bottom side sliding plate slide reliably and stably relative to the top side sliding plate in application, the top side rotational sliding surface of the bottom side sliding plate is provided with a friction-reducing sliding plate layer, which can be a tetrafluoro plate layer, a copper plate layer, a friction-reducing composite plate layer, etc. In other words, the bottom side sliding plate has a friction-reducing sliding plate layer with a formed spherical cap-shaped sliding fit surface.

[0057] The top surface of the top side sliding plate serves as a top side mounting surface, which is a planar structure. A plurality of bolt holes are provided at the non-side-by-side butt joint outer edge of the top side sliding plate, of course, the positions of these bolt holes should not affect the forming position of the bottom side rotational sliding surface described below.

[0058] The bottom surface of the top side sliding plate has a spherical cap-shaped outward convex bottom side rotating sliding surface. The spherical cap-shaped outward convexity refers to the bottom side rotating sliding surface being convex in the length direction and the width direction of the top side sliding plate, and the width direction is additionally convex compared with the existing cylindrical outward convex structure. That is, the top side sliding plate is equivalent to a spherical body structure, and the top side mounting surface is formed by cutting the top of the spherical body structure, and the length direction and the width direction are cut to form a rectangular plate structure with a spherical cap-shaped outward convex bottom surface. In this way, the bottom side rotating sliding surface of the top side sliding plate has substantially the same curvature in the width direction and the length direction, except that the chord length in the width direction is less than the chord length in the length direction.

[0059] Of course, the bottom side rotating sliding surface of the top side sliding plate should be convex-concave matched with the top side rotating sliding surface of the bottom side sliding plate, that is, the bottom side rotating sliding surface of the top side sliding plate should form a convex-concave matched spherical cap-shaped sliding fit structure with the top side rotating sliding surface of the bottom side sliding plate.

[0060] In order to make the top side sliding plate reliably and stably slide relative to the bottom side sliding plate in application, a friction-reducing sliding plate layer is provided on the bottom side rotating sliding surface of the top side sliding plate, which can be a Teflon plate layer, a copper plate layer, or a friction-reducing composite plate layer, etc. In other words, the top side sliding plate has a friction-reducing sliding plate layer with a shaped spherical cap-shaped sliding fit surface.

[0061] The bottom of the base of the cable saddle has upwardly convex skirt plates on both sides in the width direction (i.e. transversely), and the space surrounded by the convex top surface of the base is used to arrange the two pairs of sliding fit units, that is, the inner walls of the two sides of the skirt plates have a slightly larger spacing than the spacing between the outer walls of the two pairs of sliding fit units when they are arranged side by side. In addition, the convex height of the two sides of the skirt plates of the base is greater than the thickness of the bottom side sliding plate of the sliding fit unit, at least the thickness of the central length region of the bottom side sliding plate, and less than the height between the bottom end of the bolt hole of the bottom side translation sliding surface of the bottom side sliding plate of the sliding fit unit and the outer edge of the top side sliding plate.

[0062] Two translation sliding rails are formed in the space on the top surface of the base, and the two translation sliding rails correspond to the translation sliding grooves of the bottom side sliding plates of the two pairs of sliding fit units, and the forming direction of each translation sliding rail is relative to the extension direction of the main cable, i.e. longitudinally. In order to make the base reliably and stably slide relative to the bottom side sliding plate of the sliding fit unit in application, a friction-reducing sliding plate layer is provided on the surface of the top surface space of the base and the translation sliding rails, which can be a Teflon plate layer, a copper plate layer, or a friction-reducing composite plate layer, etc. In other words, the top surface space of the base has a friction-reducing sliding plate layer with a shaped translation sliding surface.

[0063] The bottom side sliding plates of the two pairs of sliding fitting units are respectively slidably assembled on the corresponding translation sliding rails in the top surface space of the base through the respective translation sliding grooves, that is, the bottom side translation sliding surfaces of the bottom side sliding plates and the top surface of the base are in planar sliding structure fitting, and the bottom side translation sliding surfaces of the bottom side sliding plates and the top surface of the base form a longitudinal sliding fitting guide rail groove pair through the matched translation sliding groove and translation sliding rail. In this way, the bottom side sliding plates of the two pairs of sliding fitting units are transversely arranged side by side relative to the extension direction of the main cable in the top surface space of the base, and the bottom side sliding plates of the two pairs of sliding fitting units are arranged in a left-right symmetrical arrangement structure along the butt joint center line. At the same time, the outer side wall surfaces of the bottom side sliding plates and the inner wall surfaces of the corresponding aprons are in gap fitting.

[0064] The top side sliding plates of the two pairs of sliding fitting units are fixedly connected to the bottom of the saddle head through bolts passing through the bolt holes in the outer edge, and the length direction of each top side sliding plate corresponds to the extension direction of the main cable carried by the saddle head, that is, the top side mounting surface of each top side sliding plate and the bottom surface of the saddle head form a butt joint fitting, and the butt joint structure between them is detachably fixedly assembled through bolt connection. The top side sliding plates of the two pairs of sliding fitting units are arranged on the corresponding bottom side sliding plates below in a spherical cap surface sliding fitting structure, the outer edge of each top side sliding plate and the top end of the corresponding apron below are in gap fitting, and the top side sliding plates of the two pairs of sliding fitting units are arranged in a left-right symmetrical arrangement structure along the butt joint center line.

[0065] As can be seen from the above structure, the bottom side sliding plates and the top side sliding plates of each sliding fitting unit of the present application are arranged between the saddle head and the base of the cable saddle, and the spherical cap sliding fitting structure between the bottom side sliding plates and the top side sliding plates can enable the saddle head to swing on the base relative to the extension direction of the main cable, and the translation sliding fitting structure between the base and the bottom side sliding plates can enable the saddle head to translate and slide on the base relative to the extension direction of the main cable.

[0066] The replacement method of any one of the sliding fitting units based on the above structure comprises the following technical measures:

[0067] determining the damaged sliding fitting unit;

[0068] lifting the saddle head on the side of the sliding fitting unit that needs to be replaced (i.e., the damaged one) by using a jack or other conventional lifting structure, enabling the self-weight and load of the saddle head to act on the currently serving sliding fitting unit and the lifting structure through the spherical cap sliding fitting of the currently serving sliding fitting unit, and unloading the load on the damaged sliding fitting unit;

[0069] dismantling the sliding fitting unit that needs to be replaced;

[0070] assembling a new sliding fitting unit at the original position of the dismantled sliding fitting unit;

[0071] - dismounting the lifting structure, so that the saddle head is reseated on the two pairs of sliding fitting units, i.e. the self-weight and load of the saddle head are jointly applied to the transversely side-by-side sliding fitting units; in this way, the replacement of the damaged sliding fitting units constituting the support structure is realized.

[0072] Embodiment 3

[0073] The other contents of this embodiment are the same as those of Embodiment 1 or 2, except that the bottom surface translation sliding grooves of the bottom side sliding plates of the sliding fitting units are two parallel grooves; and correspondingly, the top surface space of the base is formed with two parallel translation sliding rails corresponding to the bottom side sliding plates of each pair of sliding fitting units.

[0074] Embodiment 4

[0075] The other contents of this embodiment are the same as those of Embodiment 1 or 2, except that the sliding fitting units constituting the support structure are three pairs of transversely side-by-side sliding fitting units.

[0076] This embodiment can realize the swinging movement of the saddle head relative to the main cable extension direction on the base, and the replacement of the sliding fitting units constituting the support structure, but the middle sliding fitting units are not easy or suitable to be replaced, and the replacement can only be the sliding fitting units on the two sides.

[0077] Embodiment 5

[0078] The other contents of this embodiment are the same as those of Embodiment 1 or 2, except that the bottom surface of the bottom side sliding plate of the sliding fitting unit has one outward convex translation sliding rail; and correspondingly, the top surface space of the base is formed with an inward recessed structure translation sliding groove corresponding to the bottom side sliding plate of each pair of sliding fitting units.

[0079] The above embodiments are only used to illustrate the present application, but not to limit it. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can be made to the above embodiments, or equivalent replacements can be made to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present application.

Claims

1. A saddle support structure arranged between a saddle head (3) and a base (4) of a saddle; characterized in that: the support structure has two pairs of sliding fit units arranged side by side transversely to the main cable extension direction, and the two pairs of sliding fit units are arranged symmetrically left and right along the side-by-side butt joint centerline, each pair of sliding fit units is composed of a bottom side sliding plate (1) and a top side sliding plate (2) in spherical cap sliding fit; the concave-convex fit structure between the two pairs of sliding fit units side by side forms a constraint limit for the transverse swinging action of the saddle head (3) on the base (4) relative to the main cable extension direction, and the swinging action of the saddle head (3) on the base (4) makes an axial rotation action around the spherical center line of the two pairs of sliding fit units.

2. The saddle support structure according to claim 1, characterized by: The bottom side sliding plate (1) and / or the top side sliding plate (2) of the sliding fit unit has a friction-reducing sliding plate layer with a spherical cap-shaped sliding fit surface.

3. A saddle support structure according to claim 1 or 2, wherein: The bottom side sliding plate (1) of the sliding fit unit is slidingly assembled with the base (4) through the bottom surface, and the top surface of the bottom side sliding plate (1) has a top side rotating sliding surface (11) protruding outward in a spherical cap shape; the top side sliding plate (2) of the sliding fit unit is fixedly assembled with the saddle head (3) through the top surface, and the bottom surface of the top side sliding plate (2) has a bottom side rotating sliding surface (21) recessed inward in a spherical cap shape, and the bottom side rotating sliding surface (21) of the sliding fit unit and the top side rotating sliding surface (11) are in concave-convex spherical cap sliding fit.

4. The saddle support structure of claim 3, wherein: The bottom surface of the bottom side sliding plate (1) of the sliding fit unit is a bottom side translational sliding surface (12), and the bottom side translational sliding surface (12) and the top surface of the base (4) are in planar sliding fit, and at least one guide rail sliding groove pair longitudinally sliding fit relative to the main cable extension direction is arranged therebetween.

5. The saddle support structure of claim 4, wherein: The guide rail sliding groove pair is composed of a translational sliding rail (41) protruding from the top surface of the base (4) and a translational sliding groove (13) recessed in the bottom side translational sliding surface (12) of the bottom side sliding plate (1).

6. The saddle support structure of claim 5, wherein: The top surface of the base (4) and the surface of the translational sliding rail (41) have a friction-reducing sliding plate layer, and the bottom side translational sliding surface (12) of the bottom side sliding plate (1) and the surface of the translational sliding groove (13) have a friction-reducing sliding plate layer.

7. The saddle support structure of claim 3, wherein: The top surface of the top side sliding plate (2) of the sliding fit unit is a top side mounting surface (22), and the top side sliding plate (2) is fixedly assembled on the bottom surface of the saddle head (3) through the top side mounting surface (22) in a detachable connection structure.

8. The saddle support structure of claim 3, wherein: The base (4) has upwardly protruding skirt plates (42) on the two lateral sides, and the two lateral skirt plates (42) form a space on the top surface of the base (4) for arranging the sliding fit units, and the inner wall surface of each lateral skirt plate (42) and the corresponding wall surface of the sliding fit unit are in gap fit, and the top surface of each lateral skirt plate (42) and the corresponding bottom surface of the top side sliding plate (2) above are in gap fit.

9. A replacement method based on the saddle support structure according to any one of claims 1 to 8, comprising the following technical measures: - lifting the saddle (3) at the side of the sliding fit unit that needs to be replaced at the moment, by the spherical cap sliding fit of the sliding fit unit that is in service at the moment, the weight and load of the saddle (3) acting on the sliding fit unit that is in service at the moment and the lifting structure; - disassembling the sliding fit unit that needs to be replaced at the moment; - assembling a new sliding fit unit in the place of the disassembled sliding fit unit; - disassembling the lifting structure, the weight and load of the saddle (3) acting on the sliding fit units that are in lateral side-by-side arrangement.

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