Large displacement cable sleeve for protecting main cable of suspension bridge

Abstract

The application discloses a large-displacement cable sleeve for protecting a main cable of a suspension bridge, which comprises a cable sleeve body and a connecting piece; the cable sleeve body is used for matching the inner side of the end of the connecting piece, and an active ring is connected to the cable sleeve body in a dynamic sealing structure with an axial sliding displacement; the outer end of the active ring extends out of the corresponding end of the cable sleeve body, and the outer end of the active ring is connected with a radially outward convexly formed radial sliding plate; the connecting piece is used for matching the end of the cable sleeve body, and has a sealing ring cover with a radial longitudinal depth; and the radial sliding plate of the active ring is inserted into the sealing ring cover in a dynamic sealing structure with a radial sliding displacement. The application can realize axial and radial large-displacement telescopic deformation, has good stability and a long service life.

Description

TECHNICAL FIELD

[0001] The present application relates to a main cable protective sleeve for a suspension bridge, in particular to a sleeve structure for protecting a main cable of a suspension bridge, which can realize large displacement expansion in axial and radial directions. BACKGROUND

[0002] In a suspension bridge project, the dynamic and static loads of the bridge act on the main cable, and the main cable is the core load-bearing component of the suspension bridge, and is known as the "lifeline" of the suspension bridge. It can be seen that the service safety of the main cable is directly related to the safety of the entire suspension bridge in service. In order to reduce the erosion of the main cable by natural factors in the atmospheric environment, the main cable has a protective structure outside, which mainly consists of a wire-winding protective structure wound outside the circular cross-section main cable section and a sleeve structure sleeved outside the special-shaped cross-section main cable section. The sleeve structure is mainly arranged at the main cable exit and entry saddle cover or the front wall of the anchor chamber. On the one hand, the main cable at the exit and entry saddle cover or the front wall of the anchor chamber is in a scattered shape with irregular cross-section, which is not conducive to protection by wire winding, and needs to be protected by a sleeve that can enclose it. On the other hand, in order to adapt to the load changes of the main cable, the protective structure is allowed to produce displacement expansion at the exit and entry saddle cover or the front wall of the anchor chamber. The sleeve structure has smaller constraint on the main cable than the wire-winding structure, so that the load changes of the main cable are not affected by the protective structure.

[0003] The traditional sleeve structure is mainly composed of an upper half sleeve and a lower half sleeve which are circumferentially locked by locking bolts. When installed on the main cable, the two ends are connected to the corresponding structural members by a sealing rubber ring and a snap connection. The displacement expansion completely depends on the compression deformation capacity of the sealing rubber ring, and the displacement expansion deformation amount is small, which cannot meet the large displacement expansion under large load. In view of this, the applicant has previously disclosed a sleeve that can realize large displacement expansion, as described in detail in the Chinese patent document entitled "Suspension bridge main cable sleeve capable of realizing large displacement expansion" (publication number CN 205822011 U, publication date December 21, 2016). In this technology, the corresponding end portions of the sleeve body are connected to the opposite structural members through the axial deformation pipes of the corrugated structure, and the large displacement expansion is realized through the expansion and deformation of the axial deformation pipes of the corrugated structure.

[0004] While the technology disclosed in CN 205822011 U can generate significant axial displacement and expansion deformation, this deformation relies on the tensile and compressive deformation of the corrugated axial deformation tube. Repeated tensile and compressive deformation of the corrugated tube makes it prone to deformation fatigue and damage, especially in the large displacement and expansion conditions of long-span suspension bridges and dual-purpose road-rail suspension bridges, resulting in a relatively short service life. Furthermore, existing cable sleeve structures, including the technology disclosed in CN 205822011 U, are primarily suited for axial displacement and expansion deformation, and cannot reliably generate radial displacement and expansion deformation, thus failing to meet the technical requirements for large displacement and expansion conditions in long-span suspension bridges and dual-purpose road-rail suspension bridges.

[0005] In long-span suspension bridges (typically with a main span exceeding 2000m) and dual-purpose road-rail suspension bridges, the dynamic and static loads borne by the main cable vary greatly. This requires the cable sleeves on the main cable to have large displacement and expansion capabilities in both the axial and radial directions. Existing cable sleeve structures are difficult to reliably adapt to this working environment. Summary of the Invention

[0006] The technical objective of this invention is to provide a large displacement cable sleeve for the protection of the main cable of a suspension bridge, which is stable, has good long-term performance, and can achieve large axial and radial displacement expansion and contraction deformation, taking into account the special characteristics of the protection of the main cable of the suspension bridge and the special working environment of the main cable bearing large loads, as well as the shortcomings of the existing technology.

[0007] The technical objective of this invention is achieved through the following technical solution: a large displacement cable sleeve for the protection of the main cable of a suspension bridge, comprising a cable sleeve body and connecting parts;

[0008] The inner end of the cable sleeve body, which is used to mate with the connector, is connected to a movable ring with a dynamic sealing structure that allows for axial sliding displacement.

[0009] The outer end of the movable ring extends out of the corresponding end of the cable sleeve body, and the outer end of the movable ring is connected to a radially convex radial sliding plate.

[0010] The connector serves as the end that mates with the cable sleeve body and has a sealing ring that forms a radial depth.

[0011] The radial sliding plate of the movable ring is inserted into the sealing ring cover with a dynamic sealing structure that allows radial sliding displacement.

[0012] The technical measures are targeted at the particularity of the above-mentioned main cable protection of the suspension bridge and the particularity of the working condition environment of the main cable bearing large load. An active ring capable of realizing axial and radial sliding displacement is connected at the matching position of the cable sleeve body and the connecting piece. On the premise of not affecting the sealing performance, the axial and radial displacement structure basically does not have the problem of deformation fatigue, has good stability and long service life. At the same time, through the axial relative sliding displacement of the active ring in the cable sleeve body and the radial relative sliding displacement of the active ring in the sealing ring cover of the connecting piece, only the sliding displacement space needs to be set according to the maximum allowable displacement value, there is no elastic structure member for constraining deformation expansion, the displacement expansion deformation range is large, the axial and radial large displacement expansion deformation can be realized, and the reliability and practicality are better.

[0013] As one of the preferred schemes, the connecting piece is used as the end of the cable sleeve body and is fixedly connected with a radially outward protruding baffle one, the outer edge of the radially outward protruding baffle one is connected with an axially outward protruding support ring one, the outer end of the support ring one is connected with a radially back-wound baffle one, the radially outward protruding baffle one, the support ring one and the radially back-wound baffle one form a sealing ring cavity in which the radial slide plate is inserted;

[0014] The radially outward protruding baffle one and the radially back-wound baffle one in the sealing ring cavity respectively form a dynamic sealing matching capable of radially sliding displacement with the corresponding side surface of the radial slide plate inserted therein.

[0015] When the radial slide plate is assembled in place in the sealing ring cavity, a radial sliding allowance is formed between the outer edge of the radial slide plate and the cavity bottom of the sealing ring cavity.

[0016] The above technical measures form a sealing ring cavity capable of radially embedding the active ring and retaining a radial sliding allowance, so that the technical purpose of radial relative sliding displacement is reliably met while reliably realizing dynamic sealing matching, so as to adapt to the radial displacement expansion of the cable sleeve when protecting the main cable.

[0017] Further, the radially outward protruding baffle one and the radially back-wound baffle one in the sealing ring cavity are respectively fixed with a sealing rubber pad one;

[0018] The two sealing rubber pads one respectively form a flexible contact dynamic sealing matching capable of sliding displacement with the corresponding side surface of the radial slide plate inserted therein through the tooth-shaped sliding surface.

[0019] The technical measures are aimed at the particularity that the movable ring needs to slide radially in the sealing ring cavity. The sealing ring cavity is radially dynamically sealed with the movable ring through the sealing rubber pad with the tooth-shaped sliding surface. The tooth-shaped sliding surface has good compressibility. While ensuring that the movable ring stably performs the radial sliding movement, the multiple sealing effect can be achieved to improve the sealing performance. In addition, the tooth gap of the tooth-shaped sliding surface can be used as a storage cavity for lubricating grease. The stored lubricating grease can reliably form friction lubrication for the radial sliding movement, reduce the friction coefficient, and further reliably ensure that the movable ring stably performs the radial sliding movement.

[0020] As one of the preferred solutions, the connecting piece is used as the end portion matched with the cable sleeve body, and the adjusting ring is combined and connected;

[0021] The sealing ring cover is formed on the adjusting ring used as the end portion matched with the cable sleeve body.

[0022] The technical measures extend the connecting piece in the axial direction through the combined connection of the adjusting ring, so as to compensate for the matching error between the connecting piece and the cable sleeve body and improve the flexibility of processing and assembly.

[0023] As one of the preferred solutions, the cable sleeve body is used as the inner side of the end portion matched with the connecting piece, and the second sealing rubber pad is fixedly connected;

[0024] The second sealing rubber pad is in flexible contact and dynamically sealed with the movable ring arranged therein in a slidable displacement manner through the tooth-shaped sliding surface.

[0025] The technical measures are aimed at the particularity that the movable ring needs to slide axially in the cable sleeve body. The cable sleeve body is axially dynamically sealed with the movable ring through the sealing rubber pad with the tooth-shaped sliding surface. The tooth-shaped sliding surface has good compressibility. While ensuring that the movable ring stably performs the axial sliding movement, the multiple sealing effect can be achieved to improve the sealing performance. At the same time, the tooth gap of the tooth-shaped sliding surface can be used as a storage cavity for lubricating grease. The stored lubricating grease can reliably form friction lubrication for the axial sliding movement, reduce the friction coefficient, and further reliably ensure that the movable ring stably performs the axial sliding movement.

[0026] In addition, the flexible matching structure of the cable sleeve body and the movable ring through the sealing rubber pad reliably supports and positions the relative arrangement position between the cable sleeve body and the movable ring, so that the cable sleeve body can reliably follow the movable ring to form a matching relationship, thereby ensuring the stability of the cable sleeve body when being arranged on the main cable. At the same time, the support of the sealing rubber pad for the followability meets the certain flexible deformation under stress, so that the movable ring under stress can produce a large radial sliding displacement in the sealing ring cavity of the connecting piece, reduces the hindrance of the cable sleeve body to the radial sliding displacement of the movable ring, eliminates the technical problem of damage caused by stress concentration in the rigid followability support, and has long-term good performance.

[0027] As one of the preferred solutions, the cable sleeve body is used to fit the inner side of the end of the connecting piece, and a sealing rubber pad three is fixedly connected at the inner end of the movable ring allowing the maximum axial sliding displacement amount;

[0028] The sealing rubber pad three forms a flexible contact dynamic sealing fit with the main cable passing through it.

[0029] The above technical measures, without affecting the axial sliding displacement of the movable ring, connect the cable sleeve body and the main cable through the sealing rubber pad, reliably support and position the relative arrangement position between the cable sleeve body and the main cable, so that the cable sleeve body can form a reliable follow-up fit with the main cable, thereby ensuring the stability of the cable sleeve body passing through the main cable; at the same time, the support of the sealing rubber pad for follow-up is flexible and deformed under stress, eliminating the technical problem of damage caused by stress concentration of rigid follow-up support, and having long-term effect.

[0030] As one of the preferred solutions, the cable sleeve body is used to fit the outer side of the end of the connecting piece, and a rain cover is formed to radially and longitudinally cover the sealing ring cover;

[0031] The inner cavity of the rain cover and the sealing ring cover form an active displacement allowance in the radial and axial directions, respectively.

[0032] Further, the cable sleeve body is used to fit the outer side of the end of the connecting piece, and a radially outwardly convexly formed radial outwardly convex baffle two is fixedly connected, an axially outwardly convexly formed support ring two is connected to the outer edge of the radial outwardly convex baffle two, and a radially reversely formed radial reversely baffle two is connected to the outer end of the support ring two, the radial outwardly convex baffle two, the support ring two and the radial reversely baffle two form a rain cover capable of accommodating the sealing ring cover;

[0033] In the initial state, the inner side of the radial outwardly convex baffle two of the rain cover and the outer side of the radial reversely baffle one of the sealing ring cover form an active displacement space allowing the maximum axial displacement amount; the inner side of the radial reversely baffle two of the rain cover and the outer side of the radial outwardly convex baffle one of the sealing ring cover form an active displacement space allowing the maximum axial displacement amount; the inner side of the support ring two of the rain cover and the outer side of the support ring one of the sealing ring cover form an active displacement space allowing the maximum radial displacement amount; and the active displacement space between the inner edge of the radial reversely baffle two and the outer wall of the connecting piece is at least equal to the active displacement space allowing the maximum radial displacement amount between the inner side of the support ring two and the outer side of the support ring one.

[0034] The above technical measures form a rainproof cover of the return structure at the relative displacement fitting position of the movable ring, the cable sleeve body and the connecting piece without affecting the relative sliding displacement in the axial and radial directions, so as to cover the relative displacement fitting position of the movable ring, the cable sleeve body and the connecting piece to prevent rainwater and the like from entering and improve the protection effect, and prevent the rainwater from contacting the sealing rubber pad, thereby protecting the sliding displacement friction performance between the sealing rubber pad and the relative structure.

[0035] As one of the preferred solutions, the cable sleeve body is a butt joint combination structure of multiple cable sleeve half ring bodies in the circumferential direction.

[0036] Each side butt joint position is tightened by a bolt threaded between two adjacent cable sleeve half ring bodies.

[0037] A sealing rubber strip is filled at each butt joint seam between the two adjacent cable sleeve half ring bodies, and an outer lining plate is connected to one of the adjacent cable sleeve half ring bodies and located outside the butt joint seam to limit the sealing rubber strip from the outside, and an inner lining plate is connected to the other of the adjacent cable sleeve half ring bodies and located inside the butt joint seam to limit the sealing rubber strip from the inside.

[0038] The above technical measures are specific to the cable sleeve body structure, and the sealing rubber strip filled at the butt joint seam between the adjacent half ring bodies reliably seals the butt joint seam between the adjacent half ring bodies; the inner and outer lining plate structures limit and protect the sealing rubber strip to ensure the stability and long-term effectiveness of the sealing rubber strip between the adjacent half ring bodies. Therefore, the cable sleeve body structure of the above technical measures has more excellent sealing performance and good long-term effectiveness.

[0039] As one of the preferred solutions, the connecting piece is a butt joint combination structure of multiple half ring bodies in the circumferential direction.

[0040] Each side butt joint position is tightened by a bolt threaded between two adjacent half ring bodies.

[0041] A sealing rubber strip is filled at each butt joint seam between the two adjacent half ring bodies, and an outer lining plate is connected to one of the adjacent half ring bodies and located outside the butt joint seam to limit the sealing rubber strip from the outside, and an inner lining plate is connected to the other of the adjacent half ring bodies and located inside the butt joint seam to limit the sealing rubber strip from the inside.

[0042] The above technical measures are specific to the connecting piece structure, and the sealing rubber strip filled at the butt joint seam between the adjacent half ring bodies reliably seals the butt joint seam between the adjacent half ring bodies; the inner and outer lining plate structures limit and protect the sealing rubber strip to ensure the stability and long-term effectiveness of the sealing rubber strip between the adjacent half ring bodies. Therefore, the connecting piece structure of the above technical measures has more excellent sealing performance and good long-term effectiveness.

[0043] As one of the preferred solutions, the movable ring is a docking combination structure of multiple semi-ring bodies in the circumferential direction;

[0044] The joint on each side is transitioned by a lining strip that connects adjacent semi-rings.

[0045] Furthermore, a rubber strip is filled between the liner strip and the adjacent semi-ring.

[0046] The above-mentioned technical measures are designed to address the special characteristics of the movable ring structure. The joint between adjacent half-rings is connected by a liner plate, which ensures rigidity while making the outer diameter structure as compact and round as possible to facilitate assembly within the cable sheath body.

[0047] The beneficial technical effects of this invention are as follows: The above-mentioned technical measures address the special characteristics of the main cable protection for suspension bridges and the unique working environment of main cables bearing large loads. At the junction of the cable sleeve body and the connecting member, a movable ring with a dynamic sealing structure is connected, enabling reliable axial and radial sliding displacement. Without affecting the sealing performance, the axial and radial displacement structures essentially do not suffer from deformation fatigue, exhibiting good stability and a long service life. Furthermore, through the axial relative sliding displacement of the movable ring within the cable sleeve body and the radial relative sliding displacement of the movable ring within the sealing ring cover of the connecting member, only the sliding displacement space needs to be set according to the maximum allowable displacement value. There are no elastic structural components constraining deformation and expansion, resulting in a large range of displacement and expansion deformation, enabling large axial and radial displacement and expansion deformation, thus improving reliability and practicality. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of one structure of the present invention.

[0049] Figure 2 for Figure 1 Enlarged view of section I in the image.

[0050] Figure 3 for Figure 1 Enlarged view of section II in the image.

[0051] Figure 4 for Figure 1 A schematic diagram of the cable sleeve body (the rain cover is a vertically cut structure).

[0052] Figure 5 for Figure 4 AA view in the middle.

[0053] Figure 6 for Figure 1 A schematic diagram of the active ring structure.

[0054] Figure 7 for Figure 6 BB view in the middle.

[0055] Figure code meaning: 1 - cable cover body; 11 - radial outer convex baffle two; 12 - support ring two; 13 - radial back around baffle two; 14 - sealing rubber pad two; 15 - sealing rubber pad three; 16 - limit clamp plate one; 17 - limit clamp plate two; 18 - radial end plate; 19 - cable cover half ring body one; 110 - cable cover half ring body two; 111 - sealing rubber strip; 112 - outer lining plate; 113 - inner lining plate; 114 - support rib; 2 - connecting piece; 21 - adjusting ring; 22 - radial outer convex baffle one; 23 - support ring one; 24 - radial back around baffle one; 25 - sealing ring cavity; 26 - sealing rubber pad one; 3 - main cable; 4 - movable ring; 41 - radial sliding plate; 42 - movable ring half ring body one; 43 - movable ring half ring body two; 44 - lining plate strip; 5 - cable clamp. DETAILED DESCRIPTION

[0056] The present application relates to a suspension bridge main cable protection cable cover, in particular to a suspension bridge main cable protection cable cover which can realize axial and radial large displacement expansion and contraction, and the main technical scheme content of the present application will be described in detail below in combination with multiple embodiments. Among them, embodiment 1 combines the drawings of the specification, that is Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 The technical scheme content of the present application is clearly and detailedly explained; other embodiments, although not separately drawn, can still refer to the drawings of embodiment 1 for the main structure.

[0057] It needs to be particularly pointed out that the drawings of the present application are schematic, and unnecessary details have been simplified in order to clarify the technical purpose of the present application, so as to avoid obscuring the technical scheme contributed by the present application to the prior art.

[0058] Embodiment 1

[0059] As shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the present application comprises a cable cover body 1, a connecting piece 2 and a movable ring 4.

[0060] Specifically, the cable sleeve body 1 is a joint combination structure of two cable sleeve half ring bodies, i.e., cable sleeve half ring body one 19 and cable sleeve half ring body two 110 in the circumferential direction. More specifically, the outer wall of each side joint of the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110 in the circumferential direction is formed with a connecting lug that can be worn by a bolt, and when the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110 are combined in the circumferential direction to form a whole, the connecting lugs at the joint on the same side in the circumferential direction are in a one-to-one corresponding matching relationship, and the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110 are locked in the circumferential direction by the bolts worn in the corresponding connecting lugs between the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110.

[0061] At each joint seam in the circumferential direction between the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110, a sealing rubber strip 111 is filled in the joint edge of the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110 in the circumferential direction, which seals the joint gap of the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110. In order to ensure the stability of the sealing rubber strip 111 in the joint edge of the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110 and protect the sealing rubber strip 111 from external erosion, an outer lining plate 112 extending beyond the joint seam and located outside the joint seam is connected to the cable sleeve half ring body one 19, which limits and protects the sealing rubber strip 111 from the outside of the joint seam; an inner lining plate 113 extending beyond the joint seam and located inside the joint seam is connected to the cable sleeve half ring body two 110, which limits and protects the sealing rubber strip 111 from the inside of the joint seam.

[0062] The cable sleeve body 1 with the above structure is used as fixed connection with the cable clamp 5 at one end and as movable cooperation with the connecting piece 2 at the other end.

[0063] The cable clamp connection end of the cable sleeve body 1 is fixedly connected with a radial end plate 18 formed radially outward at the end thereof. That is, the end of the cable sleeve half ring body one 19 is fixedly connected with a radial end plate formed radially outward and in the shape of a half ring, and the end of the cable sleeve half ring body two 110 is fixedly connected with a radial end plate formed radially outward and in the shape of a half ring, and when the cable sleeve half ring body one 19 and the cable sleeve half ring body two 110 are combined in the circumferential direction, the two half ring-shaped radial end plates are combined into a whole circle. The whole circle-shaped radial end plate 18 is fixedly connected with the corresponding end of the cable clamp 5 by a bolt.

[0064] The connecting piece cooperation end of the cable sleeve body 1 is movably connected with the connecting piece 2 according to the following specific structure. In the application of the suspension bridge structure, the connecting piece 2 is located at the saddle cover of the cable saddle or the front wall of the anchor chamber, and the cross section of the main cable at this position is irregularly dispersed, and the outer diameter is larger than that of the main cable at the position adjacent to the cable clamp 5. Therefore, in order to adapt to this application condition, the inner diameter of the connecting piece cooperation end of the cable sleeve body 1 is larger than that of the cable clamp connection end.

[0065] The connecting piece 2 is a structure of two half-ring bodies combined in the circumferential direction. More specifically, the outer wall of the circumferential joint of the two half-ring bodies of the connecting piece 2 is formed with a connecting lug through which a bolt can be passed. When the two half-ring bodies of the connecting piece 2 are combined in the circumferential direction, the connecting lugs on the same side of the circumferential joint are in one-to-one corresponding relationship, and the two half-ring bodies of the connecting piece 2 are locked in the circumferential direction by the bolts passed through the one-to-one corresponding connecting lugs.

[0066] At each circumferential joint seam between the two half-ring bodies of the connecting piece 2, a sealing rubber strip is filled in the circumferential joint edge of the two half-ring bodies. The sealing rubber strip completely seals the gap between the circumferential joint edge of the first half-ring body and the second half-ring body. In order to ensure the stability of the sealing rubber strip in the circumferential joint edge of the first half-ring body and the second half-ring body and protect the sealing rubber strip from external erosion, an outer lining plate is connected to the first half-ring body, which has an arc plate cross section and extends beyond the joint seam and is located on the outside of the joint seam. The outer lining plate limits and protects the sealing rubber strip from the outside of the joint seam. An inner lining plate is connected to the second half-ring body, which has an arc plate cross section and extends beyond the joint seam and is located on the inside of the joint seam. The inner lining plate limits and protects the sealing rubber strip from the inside of the joint seam.

[0067] The connecting piece 2 with the above structure is used for connecting with the saddle cover of the saddle or the front wall of the anchor chamber at one end, and is used for movably cooperating with the cable sleeve body 1 at the other end.

[0068] The connecting end of the connecting piece 2 at the saddle cover of the saddle or the front wall of the anchor chamber is fixedly connected with a radial end plate formed in radial extension at the end thereof. That is, the end of the first half-ring body of the connecting piece is fixedly connected with a radial end plate formed in radial extension and in the shape of a half-ring, and the end of the second half-ring body of the connecting piece is fixedly connected with a radial end plate formed in radial extension and in the shape of a half-ring. When the first half-ring body and the second half-ring body of the connecting piece are combined in the circumferential direction, the two half-ring-shaped radial end plates are combined into a whole circle. The whole circle-shaped radial end plate of the connecting piece is fixedly connected with the saddle cover of the saddle or the front wall of the anchor chamber by bolts.

[0069] The cable sleeve body 1 cooperating end of the connecting piece 2 has a radial and longitudinal sealing ring cover.

[0070] More specifically, the seal ring cover is mainly composed of a radially outward convex baffle 22, a support ring 23 and a radially winding baffle 24. The radially outward convex baffle 22 is fixedly connected at the end of the connecting member 2 in a radially outward convex structure. The support ring 23 is arranged at the outer edge of the radially outward convex baffle 22 in an axially outward extending structure. The radially winding baffle 24 is arranged at the outer end of the support ring 23 in a radially inward convex structure, substantially in parallel with the radially outward convex baffle 22. Between the outer end of the radially outward convex baffle 22, the support ring 23 and the outer end of the radially winding baffle 24, they are fixedly connected as a whole by the bolts passing through the support ring 23, so that the radially winding baffle 24 forms a radially winding structure at the support ring 23, and the radially outward convex baffle 22, the support ring 23 and the radially winding baffle 24 form a seal ring cover with an n-shaped cross section. The entire seal ring cover is formed in a radially outward convex structure at the end of the connecting member 2, and a seal ring cavity 25 for inserting the radial sliding plate 41 of the movable ring 4 is formed in the seal ring cover. In the structure of the aforementioned seal ring cover, the inner diameter of the radially winding baffle 24 is greater than the inner diameter of the radially outward convex baffle 22.

[0071] Since the connecting member 2 is a circumferential combination structure of two half-ring bodies, in order to adapt to the two half-ring bodies of the connecting member 2 and facilitate assembly on the main cable, the aforementioned seal ring cover is also a half-ring structure corresponding to the half-ring bodies, and when the two half-ring bodies are circular, the half-ring seal ring cover corresponds to the circular.

[0072] The inner walls of the radially outward convex baffle 22 and the radially winding baffle 24 in the aforementioned seal ring cavity 25 are respectively connected with sealing rubber pads 26, and the two sealing rubber pads 26 form a channel for inserting and forming a friction fit with the radial sliding plate 41 of the movable ring 4. The two sealing rubber pads 26 are respectively in contact with the corresponding surfaces of the radial sliding plate 41 of the movable ring 4 in a tooth-shaped sliding surface, and the tooth pattern is arranged along the radial distance.

[0073] In the structure of the aforementioned connecting member 2, in order to adapt to the axial length of the connecting member 2 which can be flexibly adjusted according to the machining error, the connecting member 2 body and the seal ring cover are formed in a split combination structure, that is, an adjusting ring 21 is formed on the connecting member 2 in a flange connection structure to form a split combination. One end of the adjusting ring 21 is combined and connected with the connecting member 2 body in a flange structure, and the seal ring cover is formed radially on the adjusting ring 21. Of course, the forming structure of the adjusting ring 21 is basically the same as that of the connecting member 2 body except for the seal ring cover.

[0074] The movable ring 4 is mainly composed of a cylinder segment and a radial sliding plate 41. The cylinder segment of the movable ring 4 is a jointed combination structure of two half ring bodies, i.e. movable ring half ring body one 41 and movable ring half ring body two 43 in the circumferential direction. More specifically, at the inner side of the jointing seam of each side of the movable ring half ring body one 41 and the movable ring half ring body two 43, a lining strip 44 between the movable ring half ring body one 41 and the movable ring half ring body two 43 is connected by connecting screws on both sides, and the lining strip 44 is an arc plate structure matching the arc profile of the movable ring half ring body one 41 and the movable ring half ring body two 43. In order to improve the sealing performance, the lining strip 44 and the adjacent movable ring half ring body one 41 and the movable ring half ring body two 43 are respectively filled with rubber strips.

[0075] The inner diameter of the cylinder segment of the movable ring 4 is greater than the outer diameter of the main cable 3 of the suspension bridge, but less than the inner diameter of the connecting piece matching end of the cable sleeve body 1. In the matching structure with the cable sleeve body 1, one end of the cylinder segment of the movable ring 4 extends into the cable sleeve body 1 (referred to as the inner end), and the other end extends out of the cable sleeve body 1 (referred to as the outer end). The outer end of the cylinder segment of the movable ring 4 is formed with a radial sliding plate 41 in a radially outward convex shape, i.e. the outer end of the movable ring half ring body one 41 is fixedly connected with a radially outwardly extended semi-ring-shaped radial sliding plate, and the outer end of the movable ring half ring body two 43 is fixedly connected with a radially outwardly extended semi-ring-shaped radial sliding plate. When the movable ring half ring body one 41 and the movable ring half ring body two 43 are combined in the circumferential direction, the two semi-ring-shaped radial sliding plates are combined into a whole circle shape. The whole circle-shaped radial sliding plate of the movable ring 4 is used for inserting into the sealing ring cavity 25 of the sealing ring cover.

[0076] The cylinder segment of the movable ring 4 is axially inserted into the connecting piece matching end of the cable sleeve body 1, and the outer wall of the cylinder segment of the movable ring 4 is spaced apart from the inner wall of the cable sleeve body 1. In order to provide circumferential support for the cylinder segment of the movable ring 4, two limit clamping plates one 16 are connected in a radially inward convex structure in the circumferential direction of the inner wall of the cable sleeve body 1. Of course, the annular structures of the two limit clamping plates one 16 are respectively matched with the semi-body separation structures of the cable sleeve body 1 for corresponding formation. The two limit clamping plates one 16 are within the allowable axial displacement coverage of the movable ring 4, and the inner diameter of the two limit clamping plates one 16 is greater than the outer diameter of the cylinder segment of the movable ring 4. Between the two limit clamping plates one 16 in the cable sleeve body 1, a sealing rubber gasket two 14 is clamped and fixed. The sealing rubber gasket two 14 is formed in a split circumferential jointing manner with the semi-body separation of the cable sleeve body 1. The inner diameter of the sealing rubber gasket two 14 is less than the inner diameter of the limit clamping plate one 16, which is formed in an inward convex manner from the inner edge of the limit clamping plate one 16. The inner diameter of the sealing rubber gasket two 14 is substantially equal to the outer diameter of the cylinder segment of the movable ring 4. The cylinder segment of the movable ring 4 inserted into the cable sleeve body 1 is inserted into the sealing rubber gasket two 14, and is relatively positioned in the cable sleeve body 1 by the support of the sealing rubber gasket two 14.

[0077] In use on the main cable 3, the movable ring 4 needs to form a relative displacement fit with the cable sleeve body 1. In order to ensure the relative sliding displacement between the two, the sealing rubber pad two 14 is arranged in a circumferential spacing with a tooth-shaped sliding surface, and forms a flexible contact dynamic sealing fit with the cylinder segment of the movable ring 4 installed therein. The tooth gaps between the tooth-shaped sliding surface can be used to store lubricating oil. After the cylinder segment of the movable ring 4 is installed in place in the sealing rubber pad two 14, the outer wall of the cylinder segment of the movable ring 4 forms a spacing fit with the inner edge of the limiting clamp plate one 16. In the above-mentioned fit structure of the cable sleeve body 1 and the movable ring 4, the outer end of the movable ring 4 is always outside the cable sleeve body 1 and extends radially, and the axial sliding displacement distance of the movable ring 4 is allowed to be the maximum, and it should be ensured that the inner end of the movable ring 4 is inside the sealing rubber pad two 14.

[0078] The radial sliding plate 41 of the movable ring 4 has an outer diameter smaller than the outer diameter of the sealing ring cavity 25 at the end of the connecting piece 2. The radial sliding plate 41 of the movable ring 4 is radially inserted into the sealing ring cavity 25 at the end of the connecting piece 2, and as described above, the two side surfaces of the radial sliding plate 41 form a flexible contact dynamic sealing fit with the sealing rubber pad one 26 in the sealing ring cavity 25. When the radial sliding plate 41 is assembled in place in the sealing ring cavity 25, the outer edge of the radial sliding plate 41 and the cavity bottom of the sealing ring cavity 25 form a radial sliding displacement amount, which is basically greater than the maximum radial displacement amount allowed by the movable ring 4.

[0079] In the above-mentioned structure, in order to support the rigidity of the cable sleeve body 1, a support rib 114 is connected inside the connecting piece fit end of the cable sleeve body 1, and as described above, the support rib 114 is a circumferential split butt joint combined structure. The inner diameter of the support rib 114 is greater than the outer diameter of the cylinder segment of the movable ring 4.

[0080] The inner walls of the cable sleeve body 1, connector 2, and movable ring 4 are fitted with the main cable 3 at a distance. In order to improve the sealing performance and maintain the follow-up of the cable sleeve body 1 and the main cable 3, two spaced limiting clamps 17 are connected to the inner wall of the cable sleeve body 1 with a radially convex structure at the inner side of the connector fitting end of the cable sleeve body 1, that is, at the inner side of the inner end of the movable ring 4 where the maximum allowable axial sliding displacement is located. Of course, the annular structure of the two limiting clamps 17 is respectively fitted to the half-body partition structure of the cable sleeve body 1 and the inner diameter of the two limiting clamps 17 is larger than the outer diameter of the main cable 3. A sealing rubber gasket 15 is clamped and fixed between two limiting clamps 17 inside the cable sleeve body 1. The sealing rubber gasket 15 is formed by splitting and circumferentially joining the halves of the cable sleeve body 1. The inner diameter of the sealing rubber gasket 15 is smaller than the inner diameter of the limiting clamps 17, and it protrudes inward from the inner edge of the limiting clamps 17. The inner diameter of the sealing rubber gasket 15 is approximately equal to the outer diameter of the main cable 3 inside. The main cable 3, which extends into the cable sleeve body 1, is inserted into the sealing rubber gasket 15. The cable sleeve body 1 and the main cable 3 move together due to the support of the sealing rubber gasket 15. That is, the sealing rubber gasket 15 and the main cable 3 inside form a flexible contact dynamic seal. The outer wall of the main cable 3 maintains a gap fit with the inner edge of the limiting clamps 17. To improve the sealing performance, the sealing rubber gasket 15 has a rectangular cross-section.

[0081] In the above structure, in order to protect the radial sliding displacement fit structure between the connector 2 and the movable ring 4, and the axial sliding displacement fit structure between the movable ring 4 and the cable sleeve body 1, a rain cover is formed on the outside of the connector fit end of the cable sleeve body 1.

[0082] More specifically, the rain cover mainly consists of a radially convex baffle 11, a support ring 12, and a radially coiled baffle 13. The radially convex baffle 11 is fixedly connected to the end of the cable sleeve body 1 with a radially convex forming structure. The support ring 12 is arranged on the outer edge of the radially convex baffle 11 with an axially extending structure. The radially coiled baffle 13 is arranged on the outer end of the support ring 12 with a radially inward forming structure, and is basically in a parallel fit with the radially convex baffle 11. The outer ends of the radially convex baffle 11, the support ring 12, and the radially retractable baffle 13 are sequentially and fixedly connected as a whole by welding, so that the radially retractable baffle 13 forms a radially retractable structure at the support ring 12. The radially convex baffle 11, the support ring 12, and the radially retractable baffle 13 together form an n-shaped rain cover. The entire rain cover is radially convex at the end of the cable sleeve body 1, and an inner cavity space is formed inside the rain cover that can accommodate the above-mentioned sealing ring cover, has radial depth, and surrounds the above-mentioned sealing ring cover. The inner cavity of the rain cover and the sealing ring cover inserted therein have movable displacement margins in the radial and axial directions, respectively.

[0083] In the cooperation structure of the rain cover and the sealing ring cover inserted therein, under the initial state:

[0084] - the inner side of the radially outward protruding baffle plate two 11 of the rain cover and the outer side of the radially back-turning baffle plate one 24 of the sealing ring cover form an active displacement space allowing axial maximum displacement;

[0085] - the inner side of the radially back-turning baffle plate two 13 of the rain cover and the outer side of the radially outward protruding baffle plate one 22 of the sealing ring cover form an active displacement space allowing axial maximum displacement;

[0086] - the inner side of the support ring two 12 of the rain cover and the outer side of the support ring one 23 of the sealing ring cover form an active displacement space allowing radial maximum displacement;

[0087] - the active displacement space between the inner edge of the radially back-turning baffle plate two 13 and the outer wall of the connecting piece 21 is at least equal to the active displacement space allowing radial maximum displacement between the inner side of the support ring two 12 and the outer side of the support ring one 23.

[0088] The cable sleeve of the above structure surrounds the main cable 3 in a circumferential abutting combination manner, and is fixed to the fixed structure such as the cable clamp 5, the saddle cover / anchor front wall at both ends of the corresponding main cable 3.

[0089] Embodiment 2

[0090] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0091] The connecting piece is a whole structure, the sealing ring cover is directly formed on the end of the connecting piece, and the adjusting ring is removed.

[0092] Embodiment 3

[0093] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0094] The rain cover at the end of the cable sleeve body is removed, and a flexible rain-blocking brush is arranged between the inner edge of the support rib and the cylindrical segment of the movable ring.

[0095] Embodiment 4

[0096] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0097] The radially outward protruding baffle plate one, the support ring one, and the radially back-turning baffle plate one of the sealing ring cover are sequentially welded.

[0098] Embodiment 5

[0099] The other contents of this embodiment are the same as those of Embodiment 1, except that:

[0100] The radial outer convex baffle, the supporting ring and the radial back-turning baffle of the rain cover are flange-connected in sequence.

[0101] The above embodiments are only used to illustrate the present application, but not limit the present application.

[0102] Although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that the above embodiments can be modified, or some technical features can be replaced by equivalent features, for example, the cable sleeve body, the movable ring and the connecting piece can be combined and connected by three half-ring bodies, and the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the present application.

Claims

1. A large displacement cable sleeve for protecting a main cable of a suspension bridge, comprising a sleeve body (1) and a connecting piece (2); characterized in that: the sleeve body (1) is used to fit the inner side of the end of the connecting piece (2), and an active ring (4) is connected in an axially sliding displacement dynamic sealing structure; the outer end of the active ring (4) extends out of the corresponding end of the sleeve body (1), and the outer end of the active ring (4) is connected with a radially outward convexly formed radial sliding plate (41); the connecting piece (2) is used to fit the end of the sleeve body (1), and has a sealing ring cover formed in radial depth; the radial sliding plate (41) of the active ring (4) is inserted in the sealing ring cover in a radially sliding displacement dynamic sealing structure; the connecting piece (2) is used to fit the end of the sleeve body (1), and is fixedly connected with a radially outward convexly formed radial outward convex baffle one (22), the outer edge of the radial outward convex baffle one (22) is connected with an axially outward convexly formed support ring one (23), the outer end of the support ring one (23) is connected with a radially back around formed radial back around baffle one (24), the radial outward convex baffle one (22), the support ring one (23) and the radial back around baffle one (24) form a sealing ring cover, and a sealing ring cavity (25) in which the radial sliding plate (41) is inserted is formed in the sealing ring cover; the radial outward convex baffle one (22) and the radial back around baffle one (24) in the sealing ring cavity (25) respectively form a radially sliding displacement dynamic sealing fit with the corresponding side surface of the radial sliding plate (41) inserted therein; when the radial sliding plate (41) is assembled in place in the sealing ring cavity (25), a radial sliding allowance is formed between the outer edge of the radial sliding plate (41) and the cavity bottom of the sealing ring cavity (25).

2. The large displacement cable sleeve for protecting a main cable of a suspension bridge according to claim 1, characterized in that: the radial outward convex baffle one (22) and the radial back around baffle one (24) in the sealing ring cavity (25) are respectively fixed with sealing rubber pads one (26); the two side sealing rubber pads one (26) respectively form a sliding displacement flexible contact dynamic sealing fit with the corresponding side surface of the radial sliding plate (41) inserted therein in a tooth-shaped sliding surface.

3. The large displacement cable sleeve for protecting a main cable of a suspension bridge according to claim 1, characterized in that: the connecting piece (2) is used to fit the end of the sleeve body (1), and is combined with an adjusting ring (21); the sealing ring cover is formed on the end of the adjusting ring (21) used to fit the sleeve body (1).

4. The large displacement cable sleeve for protecting a main cable of a suspension bridge according to claim 1, characterized in that: the sleeve body (1) is used to fit the inner side of the end of the connecting piece (2), and is fixedly connected with a sealing rubber pad two (14); the sealing rubber pad two (14) forms a sliding displacement flexible contact dynamic sealing fit with the active ring (4) inserted therein in a tooth-shaped sliding surface.

5. The large displacement cable sleeve for protecting a main cable of a suspension bridge according to claim 1 or 4, characterized in that: The cable sleeve body (1) is used for matching the end inside of the connecting piece (2), and the sealing rubber pad three (15) is fixedly connected at the inner end of the maximum axial sliding displacement of the movable ring (4); The sealing rubber pad three (15) forms a flexible contact dynamic sealing cooperation with the main cable (3) installed therein.

6. The large displacement cable sleeve for protecting the main cable of the suspension bridge according to claim 1, characterized in that: The cable sleeve body (1) is used for matching the end outside of the connecting piece (2), and has a rain cover for forming a radial longitudinal depth and surrounding the sealing ring cover; The inner cavity of the rain cover and the sealing ring cover form a radial and axial displacement space, respectively.

7. The large displacement cable sleeve for protecting the main cable of the suspension bridge according to claim 6, characterized in that: The cable sleeve body (1) is used for matching the end outside of the connecting piece (2), and is fixedly connected with a radially outward convexly formed radially outward convex baffle two (11), the outer edge of the radially outward convex baffle two (11) is connected with an axially outward convexly formed supporting ring two (12), the outer end of the supporting ring two (12) is connected with a radially back around formed radially back around baffle two (13), and the radially outward convex baffle two (11), the supporting ring two (12) and the radially back around baffle two (13) form a rain cover for accommodating the sealing ring cover; In the initial state, the radially outward convex baffle two (11) of the rain cover and the radially back around baffle one (24) of the sealing ring cover form an axial displacement space allowing the maximum displacement, the radially back around baffle two (13) of the rain cover and the radially outward convex baffle one (22) of the sealing ring cover form an axial displacement space allowing the maximum displacement, the radially outward convex baffle two (11) of the rain cover and the radially back around baffle one (24) of the sealing ring cover form an axial displacement space allowing the maximum displacement, and the inner edge of the radially back around baffle two (13) and the outer wall of the connecting piece (2) form an axial displacement space allowing the maximum displacement.

8. The large displacement cable sleeve for protecting the main cable of the suspension bridge according to claim 1, characterized in that: The cable sleeve body (1) is a joint combination structure of multiple cable sleeve half rings in the circumferential direction; Each side joint is tightened by a bolt installed between two adjacent half rings; Each joint seam between the two adjacent half rings is filled with a sealing rubber strip (111), and the adjacent cable sleeve half ring one (19) is connected with an outer lining plate (112) outside the joint seam for limiting the sealing rubber strip (111) from the outside, and the adjacent cable sleeve half ring two (110) is connected with an inner lining plate (113) inside the joint seam for limiting the sealing rubber strip (111) from the inside; And / or, the connecting piece is a joint combination structure of multiple half rings in the circumferential direction; Each side joint is tightened by a bolt installed between two adjacent half rings; The sealant strip is filled in each butt joint between two adjacent semi-ring bodies, and an outer lining plate is connected to one of the adjacent semi-ring bodies and located outside the butt joint to limit the sealant strip from the outside, and an inner lining plate is connected to the other of the adjacent semi-ring bodies and located inside the butt joint to limit the sealant strip from the inside.

9. The large displacement cable sleeve for protecting the main cable of a suspension bridge according to claim 1, characterized in that: The movable ring (4) is a butt joint combination structure of multiple semi-ring bodies in the circumferential direction; Each side butt joint is transitioned by a lining strip commonly connected between the adjacent semi-ring bodies.

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