Fully-sealed inhaul cable anchorage device with inhaul cable taper sleeve sealing structure

Abstract

The utility model discloses a full-sealing inhaul cable anchorage device with an inhaul cable taper sleeve sealing structure, which comprises a cable body, an anchor cup and a sealing cylinder, the sealing structure at the front end of the cable body adopts a tapered expansion mode of the inhaul cable taper sleeve sealing structure, and a double-sealing structure of hole-shaft matching double sealing rings is adopted at the joint of the anchor cup and the sealing cylinder. After zinc-copper alloy or epoxy iron sand is poured into the rear end of the anchor cup for steel wire anchoring and plugging, elastic sealant is poured into the bottom of the anchor cup, and a pressing plate is adopted for further pressing and plugging, so that front, middle and rear full sealing of the inhaul cable anchorage device is achieved, and the requirement for deepwater high-pressure sealing can be met in some special occasions; and the inhaul cable can swing in any direction within a certain angle range along the axial lead, so that the reliability of the dynamic sealing performance of the inhaul cable in a deep water special occasion is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridges, and in particular relates to a fully sealed cable anchor with a cable cone sleeve sealing structure. Background Art

[0002] In the engineering field, with the improvement of the durability requirements for cables, the requirements for the full sealing and corrosion resistance of cables are also getting higher and higher. According to the statistics of various engineering cable diseases, the main anti-corrosion failure locations of cables are the anchors at both ends. At the same time, with the limited space range in shallow water and shallow sea areas, the working conditions in deep water and deep sea areas are gradually increasing. Therefore, the development of structural cables for deep water and deep sea is also on the agenda. One of the key technologies of this type of cable is the sealing performance of the cable anchor structure under the high pressure of deep water working conditions. The cable anchor is mainly composed of components such as anchor cup, sealing cylinder, dustproof ring, positioning ring, PE heat shrink sleeve, etc. The anchor cup and the sealing cylinder are connected by threads. The sealing cylinder and the cable body are usually sealed with a PE heat shrink sleeve. The bottom of the anchor cup is injected with zinc-copper alloy or epoxy iron sand for steel wire anchoring and sealing. According to statistics of various engineering cases, the specific parts of the cable anchor section that are prone to sealing failure are as follows:

[0003] At present, the heat shrink sleeve material used in the cable industry is mainly PE-polyethylene material, which is easily affected by the construction and use environment of the cable, and is damaged and cracked due to aging, which causes water and harmful media to enter the cable anchor from the gap between the sealing tube and the cable body, causing corrosion of the cable wire and corrosion failure of the anchor. See attached Figure 1 Middle A;

[0004] The anchor cup and the sealing tube are connected by threads, usually with thread glue or sealing pads placed at the end face. In this way, when the cable body vibrates back and forth, the sealing gap between the threads or the end face sealing gap is easy to change, causing water to penetrate into the anchor from the gap. See attached Figure 1 Middle B;

[0005] The anchor cup is filled with zinc-copper alloy or epoxy iron sand for steel wire anchoring and plugging. Zinc-copper alloy or epoxy iron sand is prone to gaps during casting. When water penetrates into the anchor along the gaps, it will cause corrosion of the cable wire and corrosion failure of the anchor. See attached Figure 1 Center C.

[0006] The sealing structure of the existing structural cable, such as the domestic patent application No. 201510564926.8 "New Cable End Waterproof Sealing Structure", adopts a sealing ring to set the surface of the cable body sheath for sealing the outer surface section of the cable, and install a sealing cover with a Haver structure on the outside of the sealing ring to compress the sealing ring to achieve the sealing of the outer surface of the cable body. This method cannot achieve the sealing effect on the surface of the cable sheath, mainly due to two factors: first, the outer circular surface of the cable is not a full circle structure. According to GB / T18365-2018 "Hot-extruded polyethylene high-strength steel wire cable for cable-stayed bridges", the outer diameter of the HDPE sheath has an outer diameter tolerance of -1 to +2 mm during the manufacturing process. If a groove-type sealing ring is used, the cross-section of the sealing ring is circular or elliptical, and the overall size of the sealing ring is limited. Although it can be deformed during compression, the entire contact area with the HDPE sheath is relatively limited, and it can even be regarded as a line contact sealing method. Once this sealing method has a slight uneven error, it is easy to leak. Secondly, due to the use of a Hafu structure sealing cover for compression, when the two halves of the sealing cover structure are buckled and closed, the edge of the sealing cover is likely to scratch the outer surface of the sealing ring, resulting in a gap defect. When the cable vibrates or swings, water will penetrate into the cable anchor along the gap defect, causing corrosion to the steel wire and the anchor.

[0007] The information disclosed in the above background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as admitting or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0008] In view of the above shortcomings, the utility model provides a fully sealed cable anchor with a cable cone sleeve sealing structure. The front end of the cable anchor body is sealed using the principle of conical compression and expansion sealing, and a double sealing ring structure with a hole and shaft matching is arranged between the anchor cup and the sealing cylinder for sealing. The end of the anchor cup is pressed and blocked by an elastic sealant pressure plate, thereby achieving full sealing of the front, middle and rear of the cable anchor, and the cable can swing in any direction within a certain range of angles along the axis, thereby improving the reliability of the dynamic sealing performance of the cable in special deepwater occasions.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A fully sealed cable anchor with a cable cone sleeve sealing structure comprises a cable body, an anchor cup and a sealing cylinder, wherein the sealing cylinder is sleeved outside the cable body, and the sealing cylinder and the cable body are sealed by the cable cone sleeve sealing structure; the end of the sealing cylinder is inserted into the front end of the anchor cup, and a sealing ring is provided at the gap between the sealing cylinder and the front end of the anchor cup; a wire dividing plate is provided in the anchor cup, and the prestressed tendons of the cable body are passed into the anchor cup and dispersedly fixed on the wire dividing plate, and anchored in the anchor cup by a sealing injection material; an elastic sealant is also injected into the anchor cup at the end of the sealing injection material, and the elastic sealant is sealed by a pressure plate.

[0011] Specifically, a first flange surface is provided at the front end of the anchor cup, a step hole is provided in the middle of the first flange surface, a second flange surface is also provided on the outer circular surface of the sealing cylinder, the sealing cylinder is inserted in the step hole, the first flange surface and the second flange surface are connected by screws, and a sealing ring installation groove is provided on the outer surface of the sealing cylinder located in the step hole, and the number of the sealing ring installation grooves is set to be at least two.

[0012] In this structural scheme, a double sealing ring structure with a hole-shaft fit is set between the anchor cup and the sealing cylinder for sealing. By means of the hole-shaft fit, a sealing surface is machined on one end of the sealing cylinder and inserted into the anchor cup. A sealing surface is machined on the inner wall of the anchor cup. According to the corresponding sealing pressure value P, the corresponding double sealing ring specification and model are selected, and the double sealing rings are respectively installed in the grooves at the insertion end of the sealing cylinder. A puller or a push tool is used to install the sealing cylinder into the anchor cup along the center direction of the circle to ensure that the sealing ring is installed in place intact. After the sealing ring is installed, the flange with a hole of the sealing cylinder is screwed and tightened to the end face of the anchor cup to prevent the sealing cylinder from being subjected to force during the reciprocating swing of the cable, which causes the sealing cylinder to fall out of the anchor cup and cause sealing failure.

[0013] Specifically, the rear end of the anchor cup is provided with a tensioning internal thread, the outer circle of the pressure plate is provided with a tensioning external thread matching the tensioning internal thread, and the pressure plate is screwed into the anchor cup through the thread.

[0014] In this structural solution, after the steel wire is anchored and sealed by pouring zinc-copper alloy or epoxy iron sand in the anchor cup, an elastic sealant with a corresponding sealing pressure value P is selected according to different tensile strengths M and bonding forces N, and the elastic sealant is poured at the bottom of the anchor cup. Before the elastic sealant is cured, a pressure plate is used to immediately perform pressure blocking. The outer circle of the pressure plate is equipped with a thread consistent with the tensioning thread. The pressure plate is screwed to the bottom, and the pressure of the pressure plate applies pressure to the flowing elastic sealant, thereby ensuring that the elastic sealant can fill various gaps between the anchor cup and the zinc-copper alloy or epoxy mortar, thereby achieving sealing at the bottom of the anchor cup.

[0015] Specifically, the cable cone sleeve sealing structure includes a cone sleeve, a sealing ring and a sealing cover; the sealing ring and the sealing cover are sequentially sleeved on the cable body, and one end of the sealing ring abuts against the end of the sealing tube; the cone sleeve is a conical sleeve ring and a compressible elastic component, the cone sleeve is arranged between the inner cavity of the sealing cover and the sealing ring, the sealing cover is sealed and connected to the sealing tube in an axially movable manner, and the inner cavity of the sealing cover applies circumferential and radial compression forces to the cone sleeve when moving; the sealing ring performs circumferential and radial compression seals on the sheath surface of the cable body and the end of the sealing tube respectively through the compression force of the cone sleeve.

[0016] Specifically, the cone sleeve is a conical ring structure with a spacing groove, and the spacing groove includes a plurality of longitudinally extending grooves arranged on the cone sleeve. The plurality of longitudinally extending grooves include a first longitudinal groove and a second longitudinal groove that are opened from both ends of the cone sleeve toward the middle of the cone sleeve and are evenly spaced.

[0017] The spaced groove cone sleeve structure of this structure adopts a full-circle structure, and the spaced groove of the cone sleeve is slotted at both ends, which avoids the hidden danger of scraping the surface of the seal ring and causing gap defects and seal failure caused by directly buckling and compressing the seal ring with two half-type sealing covers. The cone sleeve with an annular spaced groove is used to uniformly compress the seal ring in the annular direction, which protects the seal ring structure to the greatest extent and exerts the best sealing characteristics of the seal ring.

[0018] Specifically, the inner hole surface of the sealing ring has N circumferential outer ribs, and the value of N is greater than or equal to 1. The outer surface size of the sealing ring matches the inner hole size of the cone sleeve, and the two can be buckled together to form a compression sealing component.

[0019] Specifically, the inner cavity of the sealing cover is a conical structure, and the taper of the cone sleeve is greater than or equal to the taper of the inner cavity of the sealing cover; the taper angle of the cone sleeve is between 0.5° and 45°.

[0020] Specifically, the outer cylindrical surface of the sealing cylinder and the inner cylindrical surface of the sealing cover are respectively provided with connecting external threads and connecting internal threads, and the sealing cylinder and the sealing cover are connected through threads.

[0021] Specifically, the sealing potting material is zinc-copper alloy or epoxy iron sand.

[0022] This scheme uses the principle of conical compression and expansion sealing. Before making anchors at both ends of the cable body, a sealing cover is installed on the cable body, and the cone is inserted into the sealing cover. The sealing ring is then inserted into the cone sleeve. The sealing cover is axially screwed into the sealing tube through the thread to realize its axial movement. The angled inner cone surface of the sealing cover is used to apply pressure to the cone sleeve in the axial and radial forces respectively. After the cone sleeve is pressed, it applies pressure to the sealing ring in the axial and radial directions. Under the action of the radial force, the sealing ring forms a strong circumferential clamping force on the surface sheath of the cable, which is similar to the "flexible bite" function, thereby realizing the radial seal between the sealing tube and the cable body. At the same time, under the action of the axial force, the sealing ring is tightly attached to the end face of the sealing tube, thereby realizing the axial seal between the sealing tube and the cable body. When the axial movement of the sealing cover reaches the set value M, the sealing cover screwing process is suspended, the sealing ring reaches the set compression amount, and the sealing structure reaches the set pressure P value sealing effect. Through this sealing method, the sealing effect of reaching the set pressure P value between the sealing tube and the cable body sheath is realized.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The front end sealing structure of this cable anchor adopts a cable cone sleeve sealing structure which is a cone sleeve cone expansion mode. The connection between the anchor cup and the sealing tube adopts a double sealing structure of a hole shaft and a double sealing ring. The rear end of the anchor cup is filled with zinc-copper alloy or epoxy iron sand for steel wire anchoring and sealing. Then, elastic sealant is poured at the bottom of the anchor cup and a pressure plate is used for further pressure blocking to achieve full sealing of the front, middle and rear of the cable anchor. In some special occasions, it can meet the requirements of deep water high pressure sealing, and the cable can swing in any direction within a certain range of angles along the axis, which improves the reliability of the dynamic sealing performance of the cable in special deep water occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cable sealing structure of the prior art.

[0026] Figure 2 The utility model is a schematic diagram of a fully sealed cable anchor with a cable cone sleeve sealing structure.

[0027] Figure 3 It is a schematic diagram of the cable cone sleeve sealing structure of the utility model.

[0028] Figure 4 This is a view of the tapered sleeve shaft of the utility model.

[0029] Figure 5 It is a side view of the cone sleeve of the utility model.

[0030] Figure 6 This is an axial view of the sealing ring of the utility model.

[0031] Figure 7 It is a side view of the sealing ring of the utility model.

[0032] Figure 8 It is a schematic diagram of the combination of the cone sleeve and the sealing ring of the utility model.

[0033] In the figure, 1-anchor cup, 101-first flange surface, 102-step hole, 103-tensioned internal thread, 2-sealing cylinder, 201-second flange surface, 202-sealing ring installation groove, 203-connecting external thread, 3-cable cone sleeve sealing structure, 302-cone sleeve, 312-first longitudinal groove, 322-second longitudinal groove, 303-sealing ring, 313-external rib, 304-sealing cover, 314-connecting internal thread, 4-screw, 5-sealing ring, 6-elastic sealant, 7-pressure plate, 701-tensioned external thread, 8-cable body, 9-sealing injection material. DETAILED DESCRIPTION

[0034] In order to explain the technical content, purpose and effect of the utility model in detail, the following is explained in combination with the embodiments and the accompanying drawings. In the description of this embodiment, it should be understood that the terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model.

[0035] This embodiment discloses a fully sealed cable anchor with a cable cone sleeve sealing structure. Figure 2 As shown, the overall structure of this scheme includes a cable body 8, an anchor cup 1 and a sealing cylinder 2. The sealing cylinder 2 is sleeved outside the cable body 8, and the sealing cylinder 2 and the cable body 8 are sealed by a cable cone sleeve sealing structure 3; the end of the sealing cylinder 2 is inserted at the front end of the anchor cup 1.

[0036] In this embodiment, the front end of the cable body of the cable anchor is sealed using the principle of conical compression and expansion sealing. Figure 3 As shown, the cable cone sleeve sealing structure 3 includes a cone sleeve 302, a sealing ring 303, and a sealing cover 304; the sealing ring 303 and the sealing cover 304 are sequentially sleeved on the cable body 8, and one end of the sealing ring 303 abuts against the end of the sealing tube 2; the cone sleeve 302 is a conical sleeve ring and a compressible elastic component, the cone sleeve 302 is arranged between the inner cavity of the sealing cover 304 and the sealing ring 303, the sealing cover 304 is sealed and connected to the sealing tube 2 in an axially movable manner, and the inner cavity of the sealing cover 304 applies circumferential and radial compression forces to the cone sleeve 302 when moving; the sealing ring 303 performs circumferential and radial compression seals on the sheath surface of the cable body 8 and the end of the sealing tube 2 respectively through the compression force of the cone sleeve 302.

[0037] refer to Figure 3-8As shown in the schematic diagram of the cone sleeve, the cone sleeve 302 is a conical ring and a compressible elastic component. It can be made of a material with a small friction coefficient and certain elastic properties. The material selection range includes various metal materials with good elastic modulus such as steel, copper, aluminum, nickel, titanium, tungsten, alloy steel and various metal alloy materials, etc., and can also include non-metallic materials with good elastic modulus such as polyurethane, polytetrafluoroethylene, nylon, plastic, fiber, polymer synthetic materials and elastomeric materials, etc.

[0038] Specifically, the cone sleeve 302 is a cone-shaped sleeve ring structure with a spaced groove, such as Figure 4 , 5 As shown, the spacing groove shape includes a plurality of longitudinally extending grooves arranged on the cone sleeve 302, wherein the grooves are a plurality of first longitudinal grooves 312 opened from the small end of the cone sleeve 302 to the large end of the cone sleeve 302 and evenly spaced, and a plurality of second longitudinal grooves 322 opened from the large end of the cone sleeve 302 to the small end of the cone sleeve 302 and evenly spaced, each first longitudinal groove 312 and each second longitudinal groove 322 are adjacent to each other and arranged in parallel in sequence, and the closed portions of the first longitudinal grooves 312 and the second longitudinal grooves 322 extend at least to the middle of the cone sleeve 302, and can preferably be extended to the vicinity of the opposite end to form more uniform elasticity.

[0039] refer to Figure 6 , 7 The schematic diagram of the sealing ring 303 shown in the figure shows that the sealing ring 303 is made of elastic material with a large cross-sectional area. The inner hole surface of the sealing ring has N circumferential outer ribs 313, whose height is greater than 2mm. When subjected to force compression, it can provide a sufficiently large compression amount to compensate for the outer diameter error of -1 to +2mm in the hot extruded HDPE sheath of the cable during the manufacturing process, further improving the fault tolerance and reliability of the overall structural seal. The outer diameter surface size of the sealing ring 303 matches the inner hole size of the cone sleeve 302, and the two can be buckled together to form a compression sealing component, such as Figure 8 The number N of the ribs 313 protruding outwards on the inner hole surface of the sealing ring is a natural number greater than or equal to 1, and is specifically set according to the length of the sealing ring 303 .

[0040] In this embodiment, the inner cavity of the sealing cover 303 can be set to a conical structure with reference to the shape of the HDPE heat shrink sleeve in the prior art. The difference is that the taper setting of the cone sleeve 302 is greater than or equal to the taper setting of the inner cavity of the sealing cover 303, and the taper angle of the cone sleeve 302 is preferably between 0.5°-45°.

[0041] The principle of the cable cone sleeve sealing structure 300 of this embodiment is as follows: unlike the situation in which the compression amount of the conventional groove O-ring cannot be adjusted after being installed in place, this scheme utilizes the principle of compression sealing and expansion of the sealing ring 303 by the cone sleeve 302 with spaced grooves. When the cone sleeve 302 with spaced grooves compresses the sealing ring 303 annularly inwardly and axially, the cone sleeve 302 provides uniform annular inward pressure and axial force to the sealing ring 303, and the sealing ring 303 also applies annular outward pressure and reverse axial force to the cone sleeve 302 at the same time, forming an expansion function under the action of the conical surface with a certain angle, so that the N annular outer ribs 313 on the inner hole surface of the sealing ring 303 tightly bite the surface of the cable body 8 sheath, thereby forming N partition seals on the surface of the cable sheath. At the same time, when the cone sleeve 302 is axially compressed, the sealing ring 303 is axially compressed by the axial force component, and the sealing ring 303 compresses the pressure-bearing surface of the sealing cylinder 2 by the axial force component, thereby realizing the end face sealing between the end face of the sealing cylinder 2 and the end face of the sealing ring 303. Static or dynamic sealing between the sealing cylinder 2 and the sheath of the cable body 8 is realized by sealing in the above two directions.

[0042] As a preferred technical solution of this embodiment, refer to Figure 2 As shown, in this embodiment, the sealing cover 303 is sealed and connected to the sealing cylinder 300 in an axially movable manner. The specific connection structure is: the outer surface of the sealing cylinder 300 and the inner surface of the sealing cover 303 are respectively provided with a connecting external thread 203 and a connecting internal thread 314. The sealing cylinder 2 and the sealing cover 303 are connected by threads to achieve axial and radial compression of the cone sleeve 302 by the sealing cover 303. Before making anchors at both ends of the cable, the sealing cover 303 is installed on the cable body 8, the cone sleeve 302 is inserted into the sealing cover 303, and the sealing ring 303 is inserted into the cone sleeve 302. The sealing cover 303 is axially moved toward the sealing cylinder 2, and the sealing cover 303 is threadedly connected to the sealing cylinder 2, and the axial movement of the sealing cover 303 is achieved by screwing the threads into the sealing cover 303.

[0043] As the sealing cover 303 moves toward the sealing tube 2, the deformation of the compressed sealing ring 303 becomes greater, the expansion effect becomes more significant, and the sealing pressure that can be resisted becomes greater. The inward compression amount of the cone sleeve 302 can be adjusted according to the change in the movement amount of the sealing cover 303 toward the sealing tube 300, thereby achieving the adjustment requirements of high-pressure seals in different deep waters, thereby achieving the fault tolerance and reliability of the sealing performance of the annular seal on the surface of the cable body 8 sheath, and ensuring the annular sealing performance of the cable sheath surface which is most prone to failure.

[0044] In the present embodiment, a double sealing ring structure with a hole-shaft fit is provided between the anchor cup 1 and the sealing cylinder 2 for sealing. Specifically, a first flange surface 101 is provided at the front end of the anchor cup 1, a step hole 102 is provided in the middle of the first flange surface 101, a second flange surface 201 is further provided on the outer circumferential surface of the sealing cylinder 2, the sealing cylinder 2 is inserted into the step hole 102, the first flange surface 101 and the second flange surface 201 are connected by screws 4, a sealing ring installation groove 202 is provided on the outer surface of the sealing cylinder 2 located in the step hole 102, and the number of the sealing ring installation grooves 202 is set to two at intervals.

[0045] This structural scheme adopts a double sealing structure of hole-shaft matching double sealing rings at the connection between the anchor cup 1 and the sealing tube 2. The hole-shaft matching structure can prevent the threaded connection of the cable body 8 from loosening due to repeated vibrations, resulting in changes in the thread gap or end face gap that affect the sealing performance. The double sealing ring form exponentially improves the sealing reliability. Even in special occasions of deep water sealing, according to the different selections of double sealing rings, the sealing effect of different sealing pressure P values ​​can be effectively guaranteed.

[0046] In this embodiment, the end of the anchor cup 1 is plugged by elastic sealant 6 and pressure plate 7. Specifically, the sealing injection material 9 of this embodiment is zinc-copper alloy or epoxy iron sand. After the sealing injection material 9 is used to anchor and seal the prestressed tendons in the anchor cup 1, the elastic sealant 6 is injected at the rear end of the anchor cup 1. The elastic sealant 6 is a gel-like material that flows and can form a solid state after a certain period of time, so that the elastic sealant 6 can be plugged and sealed by the pressure plate 7 before forming a solid state. Before the elastic sealant 6 is solidified, the pressure plate 7 is used to apply pressure to the flowing elastic sealant 6 so that the elastic sealant 6 can be filled into the gap between the anchor cup 1 and the sealing injection material 9. The rear end of the anchor cup 1 is provided with a tensioning internal thread 103, and the outer circle of the pressure plate 7 is provided with a tensioning external thread 701 matching the tensioning internal thread 103. The pressure plate 7 is screwed into the anchor cup 1 through threads.

[0047] After the anchor cup 1 is anchored and sealed by pouring zinc-copper alloy or epoxy iron sand, an elastic sealant 6 is poured into the bottom of the anchor cup 1 and further pressed and blocked by a pressure plate 7, which can effectively solve the micro-leakage of the gap between the zinc-copper alloy or epoxy mortar and the anchor cup 1. The elastic sealant 6 is in an elastic state during the entire service process of the cable, and there will be no defects such as fragmentation and detachment of the rigid sealant due to repeated vibration of the cable body 8. At the same time, the elastic sealant 6 in a flowing state can be adaptively filled and sealed according to the uneven surface of the cast zinc-copper alloy or epoxy iron sand, eliminating the process of machining the sealing surface using a conventional sealing ring at the tail of the anchor cup 1, and also avoiding the hidden danger of the tensioning component damaging the sealing ring and the sealing groove during the process of pulling the tensioning thread, and separating the tensioning function from the tail sealing function of the anchor cup 1 without interfering with each other, thereby ensuring the efficiency and safety of the entire operation process. The elastic sealant 6 of this structural scheme can obtain different sealing pressure values ​​P according to the different tensile strengths M and adhesion N of the colloid.

[0048] In summary, the cable cone sleeve sealing structure of this embodiment is a cone sleeve cone expansion mode. As the displacement of the sealing cover toward the sealing tube increases, the deformation of the compression sealing ring increases, and the sealing pressure that can be resisted increases. The deformation Q of the corresponding sealing ring is calculated according to the displacement of the sealing cover, and the corresponding sealing pressure P value can be obtained. In some special occasions, it can meet the requirements of deep-water high-pressure sealing. The double sealing form of the hole-shaft matching and the elastic sealant pressure plate plugging method at the tail of the anchor cup can also meet the requirements of deep-water high-pressure sealing. Therefore, this structural solution realizes the front, middle and rear full sealing of the cable anchor, improves the reliability of the dynamic sealing performance of the cable in special deep-water occasions, and finally achieves the purpose of this embodiment.

[0049] The cable cone sleeve sealing structure of this embodiment is compared with the prior art through experimental testing, and the indicators are as follows:

[0050] Contrast effect

[0051]

[0052] Through the comparison of the above indicators, the performance of this embodiment is better than that of the prior art.

[0053] Although the present invention has been described in detail above with specific implementation methods, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A fully sealed cable anchor with a cable cone sleeve sealing structure, comprising a cable body (8), an anchor cup (1) and a sealing cylinder (2), characterized in that: The sealing cylinder (2) is sleeved on the outside of the cable body (8), and the sealing cylinder (2) and the cable body (8) are sealed by a cable cone sleeve sealing structure (3); the end of the sealing cylinder (2) is inserted into the front end of the anchor cup (1), and a sealing ring (5) is provided at the gap between the sealing cylinder (2) and the front end of the anchor cup (1); a wire dividing plate is provided in the anchor cup (1), and the prestressed tendons of the cable body (8) are inserted into the anchor cup and dispersedly fixed on the wire dividing plate, and are anchored in the anchor cup (1) by a sealing injection material (9); an elastic sealant (6) is also injected into the anchor cup (1) at the end of the sealing injection material (9), and the elastic sealant (6) is sealed by a pressure plate (7).

2. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 1, characterized in that: The front end of the anchor cup (1) is provided with a first flange surface (101), the middle part of the first flange surface (101) is provided with a step hole (102), the outer circumferential surface of the sealing cylinder (2) is further provided with a second flange surface (201), the sealing cylinder (2) is inserted into the step hole (102), the first flange surface (101) and the second flange surface (201) are connected by screws (4), the outer surface of the sealing cylinder (2) located in the step hole (102) is provided with a sealing ring installation groove (202), and the number of the sealing ring installation grooves (202) is set to be at least two at intervals.

3. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 1, characterized in that: The rear end of the anchor cup (1) is provided with a tensioning internal thread (103), the outer circle of the pressing plate (7) is provided with a tensioning external thread (701) matching the tensioning internal thread (103), and the pressing plate (7) is screwed into the anchor cup (1) via threads.

4. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 1, characterized in that: The cable cone sleeve sealing structure (3) comprises a cone sleeve (302), a sealing ring (303) and a sealing cover (304); The sealing ring (303) and the sealing cover (304) are sequentially sleeved on the cable body (8), and one end of the sealing ring (303) abuts against the end of the sealing tube (2); the cone sleeve (302) is a conical sleeve and a compressible elastic component, and the cone sleeve (302) is arranged between the inner cavity of the sealing cover (304) and the sealing ring (303); the sealing cover (304) is sealed and connected to the sealing tube (2) in an axially movable manner, and the inner cavity of the sealing cover (304) applies circumferential and radial compression forces to the cone sleeve (302) when moving; the sealing ring (303) performs circumferential and radial compression seals on the sheath surface of the cable body (8) and the end of the sealing tube (2) respectively through the compression force of the cone sleeve (302).

5. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 4, characterized in that: The cone sleeve (302) is a cone-shaped ring structure with a spacing groove, and the spacing groove includes a plurality of longitudinally extending grooves arranged on the cone sleeve (302), and the plurality of longitudinally extending grooves include a first longitudinal groove (312) and a second longitudinal groove (322) that are opened from both ends of the cone sleeve (302) toward the middle of the cone sleeve (302) and are evenly spaced.

6. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 4, characterized in that: The inner hole surface of the sealing ring (303) has N circumferential outer ribs (313), and the value of N is greater than or equal to 1; the outer circular surface size of the sealing ring (303) matches the inner hole size of the cone sleeve (302), and the two can be buckled together to form a compression sealing component.

7. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 4, characterized in that: The inner cavity of the sealing cover (304) is a conical structure, and the taper of the conical sleeve (302) is greater than or equal to the taper of the inner cavity of the sealing cover (304); the taper angle of the conical sleeve (302) is between 0.5° and 45°.

8. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 4, characterized in that: The outer circumferential surface of the sealing cylinder (2) and the inner circumferential surface of the sealing cover (304) are respectively provided with connecting external threads (203) and connecting internal threads (314), and the sealing cylinder (2) and the sealing cover (304) are connected via threads.

9. The fully sealed cable anchor with cable cone sleeve sealing structure according to claim 1, characterized in that: The sealing potting material (9) is zinc-copper alloy or epoxy iron sand.

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