A pressure-bearing fully-sealed inhaul cable anchor head structure

Abstract

The application discloses a pressure-bearing full-seal cable anchor head structure, which comprises a cable body, a sealing cylinder, a compression ring, a sealing layer, and a wedge-shaped sealing ring. The outer wall of the wedge-shaped sealing ring is provided with a recessed annular wedge groove, and the inner wall of the wedge-shaped sealing ring is provided with a first sealing area and a second sealing area. The first sealing area is provided with a plurality of first sealing soft teeth arranged at intervals, and the second sealing area is provided with a plurality of second sealing soft teeth arranged at intervals. The inclination directions of the first sealing soft teeth and the second sealing soft teeth are opposite. The wedge-shaped sleeve is provided with a protruding annular wedge body on the inner wall. The compression ring, the wedge-shaped sealing ring, and the sealing cylinder are sequentially sleeved outside the cable body in the axial direction, the first sealing area and the second sealing area are tightly attached to the cable body, the wedge-shaped sleeve is sleeved outside the wedge-shaped sealing ring and compresses the wedge-shaped sealing ring, and the sealing layer is located at the outermost layer and wraps the compression ring, the wedge-shaped sleeve, and the sealing cylinder. The application can bear external pressure, resist strong corrosive environment, and prolong the service life of the cable under extreme working conditions.

Description

Technical Field

[0001] This invention relates to the field of prestressed concrete, and more particularly to a fully sealed cable anchor head structure capable of withstanding pressure. Background Technology

[0002] The transition section between the anchor head and the cable body used for bridge cable anchoring needs to be sealed to protect the prestressing tendons inside the cable from corrosion. The sealing section mainly consists of a sealing cylinder, a sealing ring, and a sealing cover. However, because the outer diameter of the cable body is not perfectly round during manufacturing, complete sealing cannot be achieved through extrusion deformation. At locations with an elliptical outer diameter, the deformation of the sealing ring is insufficient, resulting in gaps and incomplete sealing. Furthermore, this method is suitable for environments without external pressure. If the cable is placed under the pressure of the ocean, the external pressure will break through the trace amount of sealant filling the threads, allowing water to enter through the thread gaps. Seawater disturbance will also cause the cable to stretch and shorten, leading to leakage at the cable seal. Moreover, since the cable anchor head is placed in seawater, which is highly corrosive, a single anti-corrosion sealing layer is insufficient to meet the 25-year service life requirement for the cable. Summary of the Invention

[0003] The purpose of this invention is to provide a fully sealed cable anchor head structure that can withstand pressure, resist external pressure and strong corrosive environments, and improve the service life of cables under extreme working conditions.

[0004] A pressure-resistant, fully sealed cable anchor head structure, characterized in that it comprises: a cable body; a sealing cylinder; a clamping ring; a sealing layer; a wedge-shaped sealing ring, wherein the outer wall of the wedge-shaped sealing ring is provided with a recessed annular wedge groove, and the inner wall of the wedge-shaped sealing ring is provided with a first sealing area and a second sealing area, the first sealing area being provided with a plurality of spaced-apart first sealing soft teeth, and the second sealing area being provided with a plurality of spaced-apart second sealing soft teeth, the first sealing soft teeth and the second sealing soft teeth having opposite inclination directions; and a wedge-shaped sleeve, the inner wall of the wedge-shaped sleeve being provided with a protruding annular wedge; wherein the clamping ring, the wedge-shaped sealing ring, and the sealing cylinder are sequentially sleeved on the cable body along the axial direction, the first sealing area and the second sealing area are tightly attached to the cable body, the wedge-shaped sleeve is sleeved on the wedge-shaped sealing ring and clamps the wedge-shaped sealing ring, and the sealing layer is located on the outermost layer, enclosing the clamping ring, the wedge-shaped sleeve, and the sealing cylinder inside.

[0005] In one embodiment, the cross-section of the annular wedge groove is V-shaped or U-shaped.

[0006] In one embodiment, the rear end of the sealing cylinder is provided with a first protruding step, and the front end of the anchor cup is provided with an anchor cup concave step. The first protruding step is inserted into the anchor cup concave step. A concave sealing ring is provided between the sealing cylinder and the anchor cup. The outer wall of the concave sealing ring is provided with a first protrusion and a second protrusion spaced apart. A concave portion is formed between the first protrusion and the second protrusion. The inner wall of the anchor cup concave step is provided with an anchor cup groove. The first protrusion is embedded in the anchor cup groove. The edge of the anchor cup groove is inserted into the concave portion. The second protrusion is sandwiched between the front end face of the anchor cup and the shoulder of the first protruding step.

[0007] In one embodiment, the outer wall of the first protrusion is a raised arc surface, the outer wall of the second protrusion is a raised arc surface, and the outer wall of the recess is a raised arc surface.

[0008] In one embodiment, the inner wall of the concave sealing ring is provided with three regions corresponding to the first convex part, the concave part, and the second convex part, and the inner wall of each region is a raised arc surface.

[0009] In one embodiment, the inner wall of the wedge-shaped sleeve is provided with an annular protrusion, and the top of the annular protrusion is provided with the annular wedge; a first sealing ring is provided between the annular protrusion and the clamping ring, and a first mounting groove is provided on the end face of the annular protrusion facing the clamping ring or on the end face of the clamping ring facing the annular protrusion, and the first sealing ring is embedded in the first mounting groove; or / and, a second sealing ring is provided between the annular protrusion and the sealing cylinder, and a second mounting groove is provided on the end face of the annular protrusion facing the sealing cylinder or on the end face of the sealing cylinder facing the annular protrusion, and the second sealing ring is embedded in the second mounting groove.

[0010] In one embodiment, the rear end of the clamping ring is provided with a clamping ring boss, the outer diameter of the clamping ring boss is smaller than the inner diameter of the annular wedge, and the clamping ring boss is inserted into the annular wedge and abuts against the wedge-shaped sealing ring; or / and, the front end of the sealing cylinder is provided with a sealing cylinder boss, the outer diameter of the sealing cylinder boss is smaller than the inner diameter of the annular wedge, and the sealing cylinder boss is inserted into the annular wedge and abuts against the wedge-shaped sealing ring.

[0011] In one embodiment, the first sealing soft tooth and the second sealing soft tooth are inclined inward.

[0012] In one embodiment, the sealing layer includes a stacked heat-shrinkable sleeve and a polyurea layer, the polyurea layer being located outside the heat-shrinkable sleeve, the polyurea layer completely enclosing the heat-shrinkable sleeve and extending to the surface of the cable body and the anchor cup.

[0013] In one embodiment, the inner wall of the wedge-shaped sealing ring is further provided with a relief recess, which is located between the first sealing area and the second sealing area.

[0014] Compared with the prior art, the advantages of the fully sealed cable anchor head structure capable of withstanding pressure of the present invention are as follows:

[0015] 1. A wedge-shaped sealing ring and a wedge-shaped sleeve are used to seal between the cable body and the sealing cylinder. The annular wedge of the wedge-shaped sleeve cooperates with the annular wedge groove of the wedge-shaped sealing ring. When the cable body shakes, the wedge-shaped sleeve can apply pressure to the wedge-shaped sealing ring in both directions, causing the first or second sealing soft teeth to fit tightly against the outer surface of the cable body. A seal can be achieved regardless of whether the cable body moves to the left or right.

[0016] 2. A concave sealing ring is installed between the sealing cylinder and the anchor cup for sealing. The first convex part, concave part, and second convex part of the concave sealing ring form a U-shape. Part of the concave sealing ring is embedded in the anchor cup groove on the inner wall of the anchor cup and is pressed tightly, while the other part is clamped by the end face of the anchor cup and the shoulder of the first convex step, thereby achieving a seal at the connection between the anchor cup and the sealing cylinder.

[0017] 3. Install mounting grooves on the connecting end faces of each component, and install O-rings. The O-rings are high-temperature resistant and can withstand high-temperature curing of the anchor head without melting or deforming. They are then pressed together with the end faces of other connectors to deform them and form a planar seal.

[0018] 4. Install water-stop grooves at each connection thread, and fill the water-stop grooves with thread sealant. The sealant material has strong elasticity and can withstand external water pressure.

[0019] The invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which are used to explain embodiments of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the fully sealed cable anchor head structure that can withstand pressure according to an embodiment of the present invention;

[0022] Figure 2 This is a partially enlarged schematic diagram of a fully sealed cable anchor head structure capable of withstanding pressure according to an embodiment of the present invention;

[0023] Figure 3This is a schematic diagram of the structure of the sealing cylinder in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the compression ring in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the wedge-shaped sealing ring in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the wedge-shaped sleeve in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the anchor cup structure in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the concave sleeve in an embodiment of the present invention.

[0029] Among them, 100 is the cable body, 200 is the sealing cylinder, 210 is the second raised step, 220 is the sealing cylinder boss, 230 is the first raised step, 240 is the second mounting groove, 250 is the third mounting groove, 300 is the clamping ring, 310 is the third raised step, 320 is the clamping ring boss, 330 is the first mounting groove, 400 is the sealing layer, 410 is the heat shrink sleeve, 420 is the polyurea layer, 500 is the wedge-shaped sealing ring, 501 is the annular wedge groove, 510 is the first sealing area, 511 is the first sealing soft tooth, 520 is the second sealing area, 521 is the second sealing soft tooth, 530 is the relief recess, 540 is the wedge-shaped sealing ring boss, 600 is the wedge-shaped sleeve, 610 is the outer cylinder, 62 is the outer cylinder, and 62 is the outer cylinder. 0. Annular protrusion; 630. Annular wedge; 640. First sealing ring; 650. Second sealing ring; 700. Anchor cup; 710. Anchor cup concave step; 720. Anchor cup concave layer; 721. First anchor cup sealant; 722. Sealing plate; 723. Second anchor cup sealant; 724. Cover plate; 730. Anchor cup annular groove; 731. Anchor cup sealing ring; 740. Anchor cup groove; 800. Concave sealing ring; 810. First protrusion; 820. Concave part; 830. Second protrusion; 840. Arc surface; 910. First water-cutting groove; 920. First sealant; 930. Second water-cutting groove; 940. Second sealant; 950. Third water-cutting groove; 960. Third sealant. Detailed Implementation

[0030] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] This implementation example Figure 1-8 As shown, the pressure-resistant fully sealed cable anchor head structure includes: a cable body 100; a sealing cylinder 200; a clamping ring 300; a sealing layer 400; and a wedge-shaped sealing ring 500. The outer wall of the wedge-shaped sealing ring 500 is provided with a recessed annular wedge groove 501, and the inner wall of the wedge-shaped sealing ring 500 is provided with a first sealing area 510 and a second sealing area 520. The first sealing area 510 is provided with a plurality of spaced-apart first sealing soft teeth 511, and the second sealing area 520 is provided with a plurality of spaced-apart second sealing soft teeth 521. The soft teeth 521 are tilted in opposite directions; the wedge sleeve 600 has a raised annular wedge 630 on its inner wall; wherein, the clamping ring 300, the wedge sealing ring 500, and the sealing cylinder 200 are sequentially sleeved on the outside of the cable body 100 in the axial direction, the first sealing area 510 and the second sealing area 520 are tightly attached to the cable body 100, the wedge sleeve 600 is sleeved on the outside of the wedge sealing ring 500 and clamps the wedge sealing ring 500, and the sealing layer 400 is located on the outermost layer and wraps the clamping ring 300, the wedge sleeve 600, and the sealing cylinder 200 inside.

[0034] When the cable body 100 shakes, it may slide relative to the connecting sleeve. Because the wedge sleeve 600 presses the wedge-shaped sealing ring 500 against the outer surface of the cable body 100, the first sealing soft teeth 511 and the second sealing soft teeth 521 deform under friction, adhering tightly to the outer wall of the cable body 100. Since the inclination directions of the first sealing soft teeth 511 and the second sealing soft teeth 521 are opposite, regardless of whether the cable body 100 slides to the left or right, there is always a sealing area where the sealing soft teeth are tightly adhered to the outer surface of the cable body 100, forming a tight seal. The annular wedge 630 of the wedge sleeve 600 cooperates with the annular wedge groove 501 of the wedge-shaped sealing ring 500. When the cable body 100 shakes, the wedge sleeve 600 can apply pressure to the wedge-shaped sealing ring 500 in both directions, causing the first sealing soft teeth 511 or the second sealing soft teeth 521 to adhere tightly to the outer surface of the cable body 100. A seal can be achieved regardless of whether the cable body 100 moves to the left or right. In this article, "soft" refers to the ability to deform under friction, allowing the first sealing soft tooth 511 or the second sealing soft tooth 521 to adhere tightly to the outer surface of the cable body 100. It is not limited to being a very soft material, as long as it meets the aforementioned properties. The sealing layer 400 wraps around the connection between the wedge sleeve 600 and the clamping ring 300, and the connection between the wedge sleeve 600 and the sealing cylinder 200, providing a second seal.

[0035] In this embodiment, the cross-section of the annular wedge groove 501 is basically V-shaped (or U-shaped). V-shape means having two opposite inclined planes, and it is not limited to a strict V-shape, but can be a shape that is roughly similar to a V-shape.

[0036] The wedge sleeve 600 includes an outer cylinder 610 and an annular protrusion 620 disposed on the inner wall of the outer cylinder 610. The inner wall of the wedge sleeve 600 is provided with the annular protrusion 620, and the top of the annular protrusion 620 is provided with an annular wedge 630. A first sealing ring 640 is provided between the annular protrusion 620 and the clamping ring 300. A first mounting groove 330 is provided on the end face of the annular protrusion 620 facing the clamping ring 300 or on the end face of the clamping ring 300 facing the annular protrusion 620. The first sealing ring 640 is embedded in the first mounting groove 330. A second sealing ring 650 is provided between the annular protrusion 620 and the sealing cylinder 200. A second mounting groove 240 is provided on the end face of the annular protrusion 620 facing the sealing cylinder 200 or on the end face of the sealing cylinder 200 facing the annular protrusion 620. The second sealing ring 650 is embedded in the second mounting groove 240. The first sealing ring 640 and the second sealing ring 650 are O-rings, which not only form a primary seal to further improve the sealing effect, but also the O-rings are resistant to high temperatures, ensuring they do not melt or deform during the high-temperature curing of the anchor head. Furthermore, they form a planar seal after being compressed and deformed, resulting in excellent sealing performance.

[0037] The rear end of the clamping ring 300 is provided with a third protruding step 310, which is inserted into the outer cylinder 610 and screwed in. The rear end of the clamping ring 300 is provided with a clamping ring boss 320, which is located on the third protruding step 310. The outer diameter of the clamping ring boss 320 is smaller than the inner diameter of the annular wedge 630. The clamping ring boss 320 is inserted into the annular wedge 630 and abuts against the wedge-shaped sealing ring 500. The front end of the sealing cylinder 200 is provided with a second protruding step 210, which is inserted into the outer cylinder 610 and screwed in. The front end of the sealing cylinder 200 is provided with a sealing cylinder boss 220, which is located on the second protruding step 210. The outer diameter of the sealing cylinder boss 220 is smaller than the inner diameter of the annular wedge 630. The sealing cylinder boss 220 is inserted into the annular wedge 630 and abuts against the wedge-shaped sealing ring 500. Correspondingly, each end of the wedge-shaped sealing ring 500 is provided with a wedge-shaped sealing ring boss 540. The pressing ring boss 320 and one wedge-shaped sealing ring boss 540 are pressed against each other, and the sealing cylinder boss 220 is pressed against the wedge-shaped sealing ring boss 540 at the other end, so that the wedge-shaped sealing ring 500 is always in a state of compression deformation, so that the first sealing area 510 and the second sealing area 520 are always in close contact with the cable body 100.

[0038] In this embodiment, the first sealing soft tooth 511 and the second sealing soft tooth 521 are inclined inward. The annular wedge 630 of the wedge sleeve 600 generates the greatest pressure between the first sealing soft tooth 511 and the second sealing soft tooth 521. When the cable body 100 swings, the inward inclination of the first sealing soft tooth 511 and the second sealing soft tooth 521 makes it easier for the first sealing soft tooth 511 or the second sealing soft tooth 521 to tend to be vertical under the action of friction, thus more closely adhering to the surface of the cable body 100 and achieving a better sealing effect.

[0039] The inner wall of the wedge-shaped sealing ring 500 is also provided with a relief recess 530, which is located between the first sealing area 510 and the second sealing area 520. When the cable body 100 shakes, it causes the wedge-shaped sealing ring 500 to move left and right. The first sealing lip and the second sealing lip are deformed by friction. The first sealing area 510 and the second sealing area 520 may swing relative to each other. The relief recess 530 is provided to facilitate the relative swing of the first sealing area 510 and the second sealing area 520, so that the first sealing lip and the second sealing lip are always in close contact with the outer wall of the cable body 100, thus achieving micro-motion sealing.

[0040] The sealing layer 400 includes a stacked heat-shrinkable sleeve 410 and a polyurea layer 420. The polyurea layer 420 is located outside the heat-shrinkable sleeve 410, completely enclosing the heat-shrinkable sleeve 410 and extending to the surface of the cable body 100 and the anchor cup 700. The heat-shrinkable sleeve 410 completely encloses the wedge sleeve 600 and the clamping ring 300, and also covers a portion of the sealing cylinder 200 and the cable body 100. Firstly, the sealing sleeve itself serves a sealing function; secondly, the heat-shrinkable sleeve 410 forms a relatively flat plane on the surfaces of the wedge sleeve 600, the clamping ring 300, the sealing cylinder 200, and the cable body 100, allowing the polyurea layer 420 to be sprayed evenly on it. This prevents the polyurea layer 420 from breaking due to drastic changes in thickness, which could lead to sealing failure, such as pits or breaks.

[0041] With the cable body 100 as the front end and the anchor cup 700 as the rear end, the sealing cylinder 200 has a first protruding step 230 at its rear end and an anchor cup 700 has an anchor cup recessed step 710 at its front end. The first protruding step 230 is inserted into the anchor cup recessed step 710 and screwed in. A concave sealing ring 800 is provided between the sealing cylinder 200 and the anchor cup 700. The outer wall of the concave sealing ring 800 has a first protrusion 810 and a second protrusion 830 spaced apart. A recess 820 is formed between the first protrusion 810 and the second protrusion 830. The inner wall of the anchor cup recessed step 710 has an anchor cup groove 740. The first protrusion 810 is embedded in the anchor cup groove 740, and the edge of the anchor cup groove 740 is inserted into the recess 820. The second protrusion 830 is sandwiched between the front end face of the anchor cup 700 and the shoulder of the first protruding step 230.

[0042] The first convex portion 810, the concave portion 820, and the second convex portion 830 of the concave sealing ring 800 form a U-shape. The first convex step 230 and the anchor cup concave step 710 are screwed together. Part of the concave sealing ring is embedded in the anchor cup groove 740 and pressed tightly, while the other part is clamped by the end face of the anchor cup 700 and the shoulder of the first convex step 230, thereby achieving a seal at the connection between the anchor cup 700 and the sealing cylinder 200.

[0043] The outer wall of the first protrusion 810 is a raised arc surface 840, the outer wall of the second protrusion 830 is a raised arc surface 840, and the outer wall of the recess 820 is a raised arc surface 840. The inner wall of the concave sealing ring 800 has three regions corresponding to the first protrusion 810, the recess 820, and the second protrusion 830, and the inner wall of each region is a raised arc surface 840. When under pressure, the raised arc surface 840 can tightly abut against the anchor cup 700 or the sealing cylinder 200, resulting in a stronger sealing ability.

[0044] The rear end face of the first protruding step 230 of the sealing cylinder 200 is provided with a third mounting groove 250 and a third sealing ring installed in the third mounting groove 250. The third sealing ring is an O-ring.

[0045] The contact surface between the wedge sleeve 600 and the clamping ring 300 is provided with a first water-cutting groove 910, and a first sealant 920 is provided inside the first water-cutting groove 910. The first water-cutting groove 910 is provided on the wedge sleeve 600, or on the clamping ring 300, or on both the wedge sleeve 600 and the clamping ring 300. In this embodiment, the first water-cutting groove 910 and the first sealant 920 are provided at each corner of the contact surface between the wedge sleeve 600 and the clamping ring 300.

[0046] The contact surface between the wedge sleeve 600 and the sealing cylinder 200 is provided with a second water-cutting groove 930, and a second sealant 940 is provided within the second water-cutting groove 930. The second water-cutting groove 930 is provided on the wedge sleeve 600, or on the sealing cylinder 200, or simultaneously on both the wedge sleeve 600 and the sealing cylinder 200. In this embodiment, a second water-cutting groove 930 is provided at each corner of the contact surface between the wedge sleeve 600 and the sealing ring. The first sealant 920 and the second sealant 940 form a primary seal between the wedge sleeve 600 and the compression ring 300, or between the wedge sleeve 600 and the sealing cylinder 200, further improving the sealing effect.

[0047] A third sealant 960 is provided between the first protruding step 230 of the sealing cylinder 200 and the anchor cup 700. A third water-cutting groove 950 is provided on the end face of the concave step 710 of the anchor cup. The third sealant 960 is provided in the third water-cutting groove 950.

[0048] An anchor cup 700 has an anchor cup recess 720 at its rear end. A first anchor cup sealant 721 is provided inside the anchor cup recess 720. A sealing plate 722 is provided outside the first anchor cup sealant 721. A second anchor cup sealant 723 is provided outside the sealing plate 722. A cover plate 724 is provided outside the second anchor cup sealant 723. The cover plate 724 completely covers the anchor cup recess 720 and extends to the cross-section of the rear end of the anchor cup 700. The cover plate 724 is installed on the cross-section of the rear end of the anchor cup 700 by bolts. An anchor cup annular groove 730 is provided on the cross-section of the rear end of the anchor cup 700. An anchor cup sealing ring 731 is provided inside the anchor cup annular groove 730. The cover plate 724 presses the anchor cup sealing ring 731 into the anchor cup annular groove 730. Bolts are provided to connect the cover plate 724 and the sealing plate 722. The anchor cup sealing ring 731 is an O-ring. The O-ring is resistant to high temperature and can meet the requirements of not melting or deforming when the anchor head is cured at high temperature. After being compressed and deformed by the cover plate 724, it forms a flat seal with good sealing effect.

[0049] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A fully sealed cable anchor head structure capable of withstanding pressure, characterized in that, include: Cable body; Sealed cylinder; Pressure ring; Sealing layer; The wedge-shaped sealing ring has a recessed annular wedge groove on its outer wall and a first sealing area and a second sealing area on its inner wall. The first sealing area has a plurality of spaced first sealing soft teeth and the second sealing area has a plurality of spaced second sealing soft teeth. The inclination directions of the first sealing soft teeth and the second sealing soft teeth are opposite. A wedge-shaped sleeve, wherein the inner wall of the wedge-shaped sleeve is provided with a protruding annular wedge, the wedge-shaped sleeve includes an outer cylinder and an annular protrusion provided on the inner wall of the outer cylinder, the inner wall of the wedge-shaped sleeve is provided with an annular protrusion, the top of the annular protrusion is provided with an annular wedge, the rear end of the clamping ring is provided with a third protruding step, the third protruding step is inserted into the outer cylinder and screwed in, and the front end of the sealing cylinder is provided with a second protruding step, the second protruding step is inserted into the outer cylinder and screwed in; The compression ring, the wedge-shaped sealing ring, and the sealing cylinder are sequentially sleeved on the outside of the cable body along the axial direction. The first sealing area and the second sealing area are in close contact with the cable body. The wedge-shaped sleeve is sleeved on the outside of the wedge-shaped sealing ring and compresses the wedge-shaped sealing ring. The sealing layer is located on the outermost layer and wraps the compression ring, the wedge-shaped sleeve, and the sealing cylinder inside. The rear end of the sealing cylinder is provided with a first protruding step, and the front end of the anchor cup is provided with an anchor cup concave step. The first protruding step is inserted into the anchor cup concave step. A concave sealing ring is provided between the sealing cylinder and the anchor cup. The outer wall of the concave sealing ring is provided with a first protrusion and a second protrusion spaced apart. A concave portion is formed between the first protrusion and the second protrusion. The inner wall of the anchor cup concave step is provided with an anchor cup groove. The first protrusion is embedded in the anchor cup groove. The edge of the anchor cup groove is inserted into the concave portion. The second protrusion is sandwiched between the front end face of the anchor cup and the shoulder of the first protruding step. The rear end of the clamping ring is provided with a clamping ring boss, the outer diameter of the clamping ring boss is smaller than the inner diameter of the annular wedge, and the clamping ring boss is inserted into the annular wedge and abuts against the wedge-shaped sealing ring. Alternatively, the front end of the sealing cylinder is provided with a sealing cylinder boss, the outer diameter of the sealing cylinder boss is smaller than the inner diameter of the annular wedge, and the sealing cylinder boss is inserted into the annular wedge and rests against the wedge-shaped sealing ring.

2. The fully sealed cable anchor head structure capable of withstanding pressure according to claim 1, characterized in that, The cross-section of the annular wedge groove is V-shaped or U-shaped.

3. The fully sealed cable anchor head structure capable of withstanding pressure according to claim 1, characterized in that, The outer wall of the first convex part is a raised arc surface, the outer wall of the second convex part is a raised arc surface, and the outer wall of the concave part is a raised arc surface.

4. The pressure-resistant, fully sealed cable anchor head structure according to claim 3, characterized in that, The inner wall of the concave sealing ring is provided with three regions corresponding to the first convex part, the concave part, and the second convex part, and the inner wall of each region is a raised arc surface.

5. A pressure-resistant, fully sealed cable anchor head structure according to claim 1, characterized in that, A first sealing ring is provided between the annular protrusion and the clamping ring. The annular protrusion has a first mounting groove facing the end face of the clamping ring, or the clamping ring has a first mounting groove facing the end face of the annular protrusion, and the first sealing ring is embedded in the first mounting groove; or / and, a second sealing ring is provided between the annular protrusion and the sealing cylinder. The annular protrusion has a second mounting groove facing the end face of the sealing cylinder, or the sealing cylinder has a second mounting groove facing the end face of the annular protrusion, and the second sealing ring is embedded in the second mounting groove.

6. The fully sealed cable anchor head structure capable of withstanding pressure according to claim 1, characterized in that, The first sealing soft tooth and the second sealing soft tooth are inclined inward.

7. A fully sealed cable anchor head structure capable of withstanding pressure according to any one of claims 1-6, characterized in that, The sealing layer includes a stacked heat shrink sleeve and a polyurea layer, the polyurea layer being located outside the heat shrink sleeve, the polyurea layer completely enclosing the heat shrink sleeve and extending to the surface of the cable body and the surface of the anchor cup.

8. A pressure-resistant, fully sealed cable anchor head structure according to any one of claims 1-6, characterized in that, The inner wall of the wedge-shaped sealing ring is also provided with a relief recess, which is located between the first sealing area and the second sealing area.

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