An underwater anchor

Abstract

The invention relates to an anchoring structural component and discloses an underwater anchor rod, which includes a rod body and a sleeve, the rod body including a cone head located at the front end and a rod body, the cross-sectional diameter of the rear end of the cone head being larger than the cross-sectional diameter of the rod body, the sleeve being sleeved on the outer circumference of the rod body, and the cross-sectional diameter of the sleeve being less than or equal to the cross-sectional diameter of the rear end of the cone head, the bursting portion at the front end of the sleeve being provided with at least two slits evenly spaced along the circumferential direction, and the slits being communicated with the front opening of the sleeve, the tail end of the rod body being provided with a first explosion portion, and the tail end of the sleeve being provided with a second explosion portion, the impact force of the explosion of the first explosion portion enables the underwater anchor rod to penetrate deeper into soil or rock formations, and the delayed explosion impact of the second explosion portion causes the bursting portion of the sleeve to expand into several petals under the obstruction of the cone head, thereby being anchored in the soil or rock formation, and the first limiting portion provided on the outer wall of the rod body and the second limiting portion provided on the inner wall of the sleeve make it impossible for the sleeve to retreat relative to the rod body and can only maintain the expanded shape of the front end.

Description

Technical Field

[0001] The present invention relates to an anchoring structural component, in particular to an underwater anchor rod. Background Art

[0002] Underwater anchor rods are a common underwater stabilization and anchoring structure, mainly used to fix ships, buoys, drilling platforms, underwater structures, etc., to ensure that they remain stable in the water and are not affected by currents and waves.

[0003] Common underwater anchor rods mainly include gravity anchors, which have a large deadweight and penetrate into the soil or rock layer under the water through gravity. However, the ratio of pull-out resistance to deadweight is small. The pull-out resistance mainly relies on the friction between the side wall of the anchor rod and the surrounding soil or rock. This means that under the same deadweight conditions, the pull-out resistance that the anchor rod can provide is relatively small, which seriously limits its application scope and effect. In addition, gravity anchors generally have a large deadweight and size, which also greatly increases the production, processing and transportation costs of such anchor rods. Summary of the Invention

[0004] The purpose of the present invention is to provide an underwater anchor rod that effectively solves the problems of low pull-out resistance of existing gravity anchors and increased processing and transportation costs due to their large deadweight and size.

[0005] In order to achieve the above-mentioned object, the present invention provides an underwater anchor rod, which includes a rod body and a sleeve;

[0006] The rod body includes a cone head at the front end and a rod body;

[0007] A direction parallel to the axial direction of the shaft and pointing from the shaft to the cone head is defined as a first direction, a direction in front of the first direction is defined as a front direction, and a direction behind the first direction is defined as a rear direction; a cross-sectional diameter of the front end of the cone head gradually decreases along the first direction, and a cross-sectional diameter of the rear end of the cone head is larger than a cross-sectional diameter of the shaft; a first explosive portion is provided at the rear end of the shaft, wherein the first explosive portion contains explosives and an inertia-triggered fuze, and the inertia-triggered fuze is used to detonate the explosives in the first explosive portion;

[0008] The sleeve is sleeved on the outer periphery of the shaft, and the cross-sectional diameter of the sleeve is smaller than or equal to the cross-sectional diameter of the rear end of the cone head;

[0009] The sleeve includes an explosive portion at the front end and a second explosive portion at the rear end; the explosive portion is provided with at least two slits spaced evenly along the circumference, the slits extending along the length of the sleeve and communicating with the front opening of the sleeve;

[0010] The second exploding part is provided with explosives and a delayed trigger fuse; the delayed trigger fuse is used to detonate the explosives in the second exploding part;

[0011] A first limiting portion is provided on the outer wall of the rod body, and a second limiting portion adapted to the first limiting portion is provided on the inner wall of the sleeve. The first limiting portion and the second limiting portion are used to enable the sleeve to move only in the first direction relative to the rod body, and not in the opposite direction.

[0012] Furthermore, the first limiting portion includes a plurality of first ratchet teeth, the first ratchet teeth are arranged on the outer wall of the shaft and protrude from the outer wall of the shaft, and the first ratchet teeth include a first surface and a second surface;

[0013] The orthographic projections of the first surface and the second surface in the first direction are both annular; the first surface is arranged between the second surface and the cone head; the first surface is arranged perpendicular to the outer wall of the shaft; the second surface is arranged along the first direction and inclined radially outwardly toward the shaft;

[0014] The second limiting portion includes a plurality of second ratchet teeth that cooperate with the first ratchet teeth. The second ratchet teeth are annularly arranged on the inner wall of the sleeve and protrude toward the inner cavity of the sleeve. The second ratchet teeth include a third surface and a fourth surface.

[0015] The orthographic projections of the third surface and the fourth surface in the first direction are both annular; the fourth surface is provided between the third surface and the cone head; the third surface is provided perpendicular to the inner wall of the sleeve; the fourth surface is provided in a direction opposite to the first direction and is inclined inwardly toward the radial direction of the sleeve;

[0016] When the rod body is matched with the sleeve, the first surface abuts the third surface, and the second plane is parallel to the fourth surface, so that the sleeve can only move in the first direction relative to the rod body and cannot move in the opposite direction.

[0017] Furthermore, the cone head includes a penetration portion provided at the front end and a connection portion provided at the rear end;

[0018] The cross-sectional diameter of the penetration portion gradually decreases along the first direction;

[0019] The connecting portion is connected to the shaft, the diameter of the end surface of the connecting portion connecting to the shaft is equal to the cross-sectional diameter of the shaft, and the cross-sectional diameter of the connecting portion gradually increases along the first direction until it is equal to the diameter of the end surface of the rear end of the penetration portion;

[0020] The front end surface of the sleeve is arranged obliquely and parallel to the connecting portion.

[0021] Furthermore, the penetration portion is a hollow structure, the interior of which is filled with a filler, and the density of the filler is greater than the density of the shaft and the sleeve.

[0022] Furthermore, the sleeve is made of galvanized steel, and the shaft is made of galvanized cast iron.

[0023] Furthermore, the shaft includes a first explosion groove arranged around the rear end of the shaft, the first explosion groove is provided with a first opening, the first opening passes through the rear end surface of the shaft, and the first explosion groove extends along the axial direction of the shaft; the first explosion part is provided in the first explosion groove.

[0024] Furthermore, the sleeve includes a second explosion groove arranged in an annular manner at the rear end of the sleeve, the second explosion groove is provided with a second opening, the second opening passes through the rear end face of the sleeve, and the second explosion groove extends along the axial direction of the sleeve; the second explosion part is provided in the second explosion groove.

[0025] Furthermore, the sleeve also includes a plurality of tail wings circumferentially arranged on the outer wall of the rear portion of the sleeve.

[0026] Furthermore, it also includes a hanging ring, which is fixedly connected to the center of the rear end surface of the rod body.

[0027] Compared with the prior art, the underwater anchor provided by the present invention has the following advantages:

[0028] The present invention provides an underwater anchor rod. When the underwater anchor rod contacts the underwater soil or rock formation, the inertial trigger fuse is triggered to ignite and detonate the explosive in the first explosive part. Under the explosion impact of the first explosive part, the underwater anchor rod penetrates the underwater soil layer. Compared with the penetration relying on deadweight, the penetration depth is greater. When the underwater anchor rod contacts the underwater soil or rock formation, the delayed trigger fuse is also triggered. The delayed trigger fuse acts on the explosive in the second explosive part after a certain delay time. Under the impact of the second explosive part, the sleeve moves along the first direction and pushes the rod body along the second direction. The sleeve moves in one direction to reach the specified position; under the obstruction of the cone head, the front end of the sleeve is stretched and split into multiple petals, and due to the cooperation of the first limiting portion and the second limiting portion, the sleeve cannot move in the opposite direction of the first direction, and can only maintain the existing split shape and anchored in the soil layer, thereby achieving the purpose of pull-out resistance, and since the sleeve cannot move in the opposite direction of the first direction, compared with relying solely on the self-weight and the friction between the peripheral wall of the anchor rod and the soil layer to achieve pull-out resistance, the pull-out resistance is stronger, thereby avoiding the increase in processing, production and transportation costs caused by increasing the self-weight to increase the penetration depth and pull-out resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of an underwater anchor rod according to an embodiment of the present invention;

[0030] Figure 2 is a cross-sectional schematic diagram of an underwater anchor rod according to an embodiment of the present invention;

[0031] Figure 3 yes Figure 2 A magnified schematic diagram of area A in the middle;

[0032] Figure 4 1 is a schematic diagram of the tail structure of an underwater anchor rod according to an embodiment of the present invention;

[0033] Figure 5 yes Figure 2 Schematic diagram of the enlarged area B.

[0034] In the figure, 100, underwater anchor rod; 1, rod body; 11, cone head; 111, penetration part; 112, connecting part; 12, rod body; 121, first explosion part; 122, first limiting part; 1221, first ratchet; 12211, first surface; 12212, second surface; 123, first explosion groove; 1231, first opening; 2, sleeve; 21, explosion part; 211, slit; 22, second explosion part; 23, second limiting part; 231, second ratchet; 2311, third surface; 2312, fourth surface; 24, second explosion groove; 241, second opening; 25, tail fin; 3, lifting ring. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0036] like Figures 1 to 4As shown, an underwater anchor rod 100 according to an embodiment of the present invention comprises a rod body 1 and a sleeve 2; the rod body 1 comprises a cone head 11 and a rod shaft 12 at the front end; a direction parallel to the axial direction of the rod shaft 12 and pointing from the rod shaft 12 to the cone head 11 is defined as a first direction X, the direction in front of the first direction X is the front, and the direction behind the first direction X is the rear; the front end cross-sectional diameter of the cone head 11 gradually decreases along the first direction X, and the cross-sectional diameter of the rear end of the cone head 11 is larger than the cross-sectional diameter of the rod shaft 12; a first explosive part 121 is provided at the tail end of the rod shaft 12, and the first explosive part 121 is equipped with explosives and an inertial trigger fuse (not shown in the figure), and the inertial trigger fuse is used to detonate the explosives in the first explosive part; the sleeve 2 is sleeved on the outer periphery of the rod shaft 12, and the cross-sectional diameter of the sleeve 2 is less than or equal to the cross-sectional diameter of the The cross-sectional diameter of the rear end of the cone head 11; the sleeve 2 includes an explosive part 21 at the front end and a second explosive part 22 at the tail end; the explosive part 21 is provided with at least two circumferentially spaced and evenly arranged slits 211, the slits 211 extending along the length direction of the sleeve 2, and the slits 211 are connected to the front opening of the sleeve 2; the second explosive part 22 is equipped with explosives and a delayed trigger fuse (not shown in the figure); the delayed trigger fuse is used to detonate the explosives in the second explosive part; a first limiting part 122 is provided on the outer wall of the rod body 12, and a second limiting part 23 adapted to the first limiting part 122 is provided on the inner wall of the sleeve, the first limiting part 122 and the second limiting part 23 are used to cause the sleeve 2 to move only along the first direction X relative to the rod body 1, and not in the opposite direction.

[0037] Based on the above technical solution, when the underwater anchor rod 100 sinks to the bottom of the water and contacts the soil and rock formations at the bottom of the water, the inertia-triggered fuse and the delayed-triggered fuse are triggered under the action of inertia. The inertia-triggered fuse detonates the explosives in the first explosive part 121, prompting the rod body 1 to fully penetrate into the soil or rock formations at the bottom of the water under the action of the impact force of the explosion and in conjunction with the setting that the front end cross-sectional diameter of the cone head 11 gradually decreases along the first direction X, thereby achieving a preliminary anti-pullout effect; through the first limiting portion 122 provided on the outer wall of the rod body 12 and the second limiting portion 23 provided on the inner wall of the sleeve and adapted to the first limiting portion 122, the sleeve 2 can only move relative to the rod body 1 along the first direction X, and cannot move in the opposite direction. Therefore, when the rod body 1 penetrates, the sleeve 2 penetrates together with the rod body. Thereafter, under the delayed action of the delayed-triggered fuse, the The explosive in the second explosive part 11 explodes after the underwater anchor 100 penetrates the soil or rock formation. Under the action of the impact force of the explosion, the sleeve 2 moves relative to the rod body 1 in the first direction X. Since the cross-sectional diameter of the sleeve 2 is less than or equal to the cross-sectional diameter of the rear end of the cone head 11 and the explosive part 21 at the front end of the sleeve 2 is provided with at least two circumferentially spaced and evenly arranged slits 211, which are connected to the front opening of the sleeve 2, under the obstruction of the cone head 11, the explosive part will expand into a multi-petal shape with a number equal to the slits 211, and then deeply penetrate into the soil and rock formation, thereby achieving the purpose of improving the pull-out resistance. Moreover, since the sleeve 2 can only move relative to the rod body 1 in the first direction X and cannot move in the opposite direction, the sleeve 2 cannot retreat relative to the rod body 1 and can only maintain the existing multi-petal shape, thereby ensuring the pull-out resistance of the underwater anchor 100.

[0038] Among them, the inertia-triggered fuze and the delayed-triggered fuze are both existing equipment and will not be described in detail. The function of the inertia-triggered fuze is to detonate immediately under the action of the forward inertial force after the fuze contacts the target. The function of the delayed-triggered fuze is to cause an explosion when the warhead penetrates a certain depth into the target.

[0039] Preferably, in this embodiment, the number of slits 211 is at least two, so that the bursting portion can achieve the effect of expanding and splitting under the explosive impact of the second explosive portion 22. The number of slits 211 is preferably four, so that the sleeve has slits 211 all around, which facilitates expansion and splitting, while each petal has a certain strength to prevent breakage.

[0040] Furthermore, if Figure 2 and Figure 3As shown, in order to specifically implement the restriction of the relative movement between the sleeve 2 and the rod body 12 by the first limiting portion 122 and the second limiting portion 23, the first limiting portion 122 includes a plurality of first ratchet teeth 1221, and the first ratchet teeth 1221 are arranged in a ring around the outer wall of the rod body 12 and protrude from the outer wall of the rod body 12, and the first ratchet teeth 1221 include a first surface 12211 and a second surface 12212; the positive projections of the first surface 12211 and the second surface 12212 in the first direction X are both annular; the first surface 12211 is arranged between the second surface 12212 and the cone head 11; the first surface 12211 is arranged perpendicular to the outer wall of the rod body 12; the second surface 12212 is arranged along the first direction X and inclined radially outward to the rod body 12.

[0041] The second limiting portion 23 includes a plurality of second ratchet teeth 231 that cooperate with the first ratchet teeth 1221. The second ratchet teeth 231 are arranged in a ring on the inner wall of the sleeve 2 and protrude toward the inner cavity of the sleeve 2. The second ratchet teeth 231 include a third surface 2311 and a fourth surface 2312; the positive projections of the third surface 2311 and the fourth surface 2312 in the first direction X are both annular; the fourth surface 2312 is arranged between the third surface 2311 and the cone head 11; the third surface 2311 is arranged perpendicular to the inner wall of the sleeve 2; the fourth surface 2312 is arranged in a direction opposite to the first direction X and inclined toward the inner cavity of the sleeve 2 in the radial direction of the sleeve 2.

[0042] Through the above-mentioned arrangement, when the rod body 12 cooperates with the sleeve 2, the second plane 12212 is parallel to the fourth surface 2312, which facilitates the movement of the sleeve 2 relative to the rod body 1 along the first direction X. When the sleeve 2 tends to move in a direction opposite to the first direction X, the first surface 12211 abuts against the third surface 2311 to prevent the movement of the sleeve 2, thereby achieving the purpose of preventing the sleeve 2 from moving in a direction opposite to the first direction X.

[0043] Furthermore, if Figure 2As shown, the cone head 11 includes a penetration portion 111 provided at the front end and a connecting portion 112 provided at the rear end; the cross-sectional diameter of the penetration portion 111 gradually decreases along the first direction X to form a cone with a pointed end, which is convenient for the penetration of the rod body 1; the connecting portion 112 is connected to the rod body 12, and the end surface diameter of the connecting portion 112 connected to the rod body 12 is equal to the cross-sectional diameter of the rod body 12, and the cross-sectional diameter of the connecting portion 112 gradually increases along the first direction X until it is equal to the cross-sectional diameter of the rod body 12. The diameters of the end faces of the tail ends of the penetration portions 111 are equal, thereby forming a truncated cone shape, so that the rod body 1 formed by connecting the cone head 11 and the rod body 12 has a smooth and continuous outer wall; the front end face of the sleeve 2 is arranged to be inclined upward along the first direction X and is arranged parallel to the connecting portion 112, so that the movement of the sleeve 2 relative to the rod body 1 along the first direction X is smoother, and the contact area between the connecting portion 112 and the front end face of the sleeve 2 is increased, so as to increase the thrust of the sleeve 2 on the rod body 1 in the first direction X.

[0044] Preferably, if Figure 5 As shown, the angle between the front end face of the sleeve 2 and the first direction X is recorded as a, and the value range of the angle a is 30-60 degrees. This setting is obtained through a large number of experiments. If the angle a is too small, the contact area between the front end face of the sleeve 2 and the connecting portion 112 is large, but the thrust of the sleeve 2 will be lost at the inclined contact position, which is not conducive to the propulsion of the rod body 1, because at the inclined contact position, there will be a force toward the central axis of the rod body, which will lose the thrust in the first direction X; and if the angle a is too large, the contact area between the front end face of the sleeve 2 and the connecting portion 112 is small, the thrust is not large enough, and the specified depth cannot be reached. Setting the value of the angle a to 30-60 degrees can not only ensure that the contact area between the two is large enough, but also reduce the thrust loss at the inclined contact surface between the two, and ensure sufficient thrust in the first direction X.

[0045] Furthermore, the penetration portion 111 is a hollow structure, which is filled with a filler, and the density of the filler is greater than the density of the rod body 12 and the sleeve 2. The cone head 11 is heavier than the rod body 12 and the sleeve 2. The verticality of the underwater anchor rod 100 is higher when it sinks. The cone head 11 penetrates vertically into the soil and rock layer at the bottom of the water, and with the addition of weight, the penetration depth is further increased.

[0046] Furthermore, the sleeve 2 is made of galvanized steel, and the shaft 12 is made of galvanized cast iron. Under the protection of the zinc layer, the galvanized material can effectively resist corrosion from the external environment, thereby increasing the service life of the underwater anchor rod 100.

[0047] Furthermore, if Figure 2 and Figure 4As shown, in order to facilitate the installation of the explosives in the first explosive part and the first detonating device, the rod body 12 includes a first explosion groove 123 arranged in a ring at the tail end of the rod body, and the first explosion groove 123 is provided with a first opening. The first opening 1231 passes through the rear end surface of the rod body 12, and the first explosion groove 123 extends along the axial direction of the rod body 12; the first explosion part 121 is provided in the first explosion groove 123, and the annular first explosion groove 123 allows the impact generated by the explosion to act evenly on the rod body 12, avoiding local damage to the rod body 12, so as to achieve the expected explosion effect.

[0048] Furthermore, if Figure 2 and Figure 4 As shown, similar to the arrangement of the first explosion groove 123, the sleeve 2 includes a second explosion groove 24 arranged in an annular manner at the tail end of the sleeve 2, the second explosion groove 24 is provided with a second opening 241, the second opening 241 passes through the rear end face of the sleeve 2, and the second explosion groove 24 extends along the axial direction of the sleeve 2; the second explosion portion 22 is provided in the second explosion groove 24, and the annular second explosion groove 24 enables the impact generated by the explosion to act evenly on the sleeve 2, so as to drive the sleeve 2 to move along the first direction X, avoid offset, and achieve the expected explosion effect.

[0049] Furthermore, if Figure 2 and Figure 4 As shown, in order to improve the verticality of the underwater anchor rod 100 when sinking, the sleeve further includes a plurality of tail wings 25 circumferentially arranged on the outer wall of the rear portion of the sleeve 2.

[0050] Furthermore, if Figure 1 and Figure 2 As shown, in order to facilitate the control of the underwater anchor rod 100 during the sinking process, the underwater anchor rod 100 also includes a lifting ring 3, which is fixedly connected to the center of the tail end face of the rod body 12. In this embodiment, a metal rope is used to connect to the lifting ring 3 to control the release of the underwater anchor rod 100.

[0051] The working process of the present invention is as follows: a metal rope is used to connect the lifting ring 3 at the tail of the rod body 12, so that the cone head 11 is facing downward, and the underwater anchor rod 100 is released on the water surface, and the underwater anchor rod 100 is allowed to fall freely. When the underwater anchor rod 100 contacts the soil or rock layer at the bottom of the water, under the action of inertia, the inertia-triggered fuse ignites and detonates the explosives in the first explosive part 121. Under the action of the impact force of the explosion, the underwater anchor rod 100 is pushed into the soil or rock layer at the bottom of the water as a whole; when the underwater anchor rod 100 contacts the soil or rock layer at the bottom of the water, the delayed trigger fuse ignites at the same time, and detonates after a delay of a period of time. During the time when the explosive in the second explosive part 22 and the underwater anchor rod 100 penetrate into the soil layer, under the action of the explosive impact force of the second explosive part 22, the sleeve 2 moves along the first direction X and pushes the rod body 1 to move along the first direction X to reach the specified position. The bursting part 21 of the sleeve 2 is provided with four slits 211. Under the obstruction of the cone head 11, the bursting part 21 is expanded outward into four petals, and under the action of the first ratchet 1221 and the second ratchet 231, the sleeve 2 cannot be retreated relative to the rod body 12 in the opposite direction of the first direction X, and can only maintain the existing expanded four-petal shape.

[0052] In summary, an embodiment of the present invention provides an underwater anchor rod 100, which includes a rod body 1 and a sleeve 2. The rod body 1 and the sleeve 2 are driven to penetrate the soil layer by the explosive impact of the first explosive part 121 on the rod body 1. The explosive impact of the second explosive part 22 at the tail of the sleeve 2 causes the burst part at the front end of the sleeve 2 to expand into multiple petals. Under the cooperation of the first ratchet 1221 and the second ratchet 231, the sleeve cannot move in the direction opposite to the first direction X. The sleeve 2 cannot be restored and can only maintain its existing shape and be embedded in the soil layer, thereby achieving the purpose of pull-out resistance. In addition, by filling the hollow structure of the penetration part 111 of the cone head 11 with a filler with a density greater than that of the rod body 12 and the sleeve 2 to increase the weight of the anchor head and by providing a plurality of tail wings 25 on the outer wall of the tail of the sleeve 2, the verticality of the underwater anchor rod 100 during settlement is improved, the penetration depth is further increased, and the overall pull-out resistance of the underwater anchor rod is improved.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An underwater anchor, characterized in that: including a rod body and a sleeve; The rod body includes a cone head at the front end and a rod body; A direction parallel to the axial direction of the shaft and pointing from the shaft to the cone head is defined as a first direction, a direction in front of the first direction is defined as a front direction, and a direction behind the first direction is defined as a rear direction; a cross-sectional diameter of the front end of the cone head gradually decreases along the first direction, and a cross-sectional diameter of the rear end of the cone head is larger than a cross-sectional diameter of the shaft; a first explosive portion is provided at the rear end of the shaft, wherein the first explosive portion contains explosives and an inertia-triggered fuze, and the inertia-triggered fuze is used to detonate the explosives in the first explosive portion; The sleeve is sleeved on the outer periphery of the shaft, and the cross-sectional diameter of the sleeve is smaller than or equal to the cross-sectional diameter of the rear end of the cone head; The sleeve includes an explosive portion at the front end and a second explosive portion at the rear end; the explosive portion is provided with at least two circumferentially spaced and evenly spaced slits extending along the length of the sleeve and communicating with the front opening of the sleeve; the second explosive portion is provided with explosives and a delayed trigger fuze; the delayed trigger fuze is used to detonate the explosives in the second explosive portion; A first limiting portion is provided on the outer wall of the rod body, and a second limiting portion adapted to the first limiting portion is provided on the inner wall of the sleeve. The first limiting portion and the second limiting portion are used to enable the sleeve to move only in the first direction relative to the rod body, and not in the opposite direction.

2. The underwater anchor rod according to claim 1, characterized in that: The first limiting portion includes a plurality of first ratchet teeth, the first ratchet teeth are arranged on the outer wall of the shaft and protrude from the outer wall of the shaft, and the first ratchet teeth include a first surface and a second surface; The orthographic projections of the first surface and the second surface in the first direction are both annular; the first surface is arranged between the second surface and the cone head; the first surface is arranged perpendicular to the outer wall of the shaft; the second surface is arranged along the first direction and inclined radially outwardly toward the shaft; The second limiting portion includes a plurality of second ratchet teeth that cooperate with the first ratchet teeth. The second ratchet teeth are annularly arranged on the inner wall of the sleeve and protrude toward the inner cavity of the sleeve. The second ratchet teeth include a third surface and a fourth surface. The orthographic projections of the third surface and the fourth surface in the first direction are both annular; the fourth surface is provided between the third surface and the cone head; the third surface is provided perpendicular to the inner wall of the sleeve; the fourth surface is provided in a direction opposite to the first direction and is inclined inwardly toward the radial direction of the sleeve; When the rod body is matched with the sleeve, the first surface abuts the third surface, and the second plane is parallel to the fourth surface, so that the sleeve can only move in the first direction relative to the rod body and cannot move in the opposite direction.

3. The underwater anchor rod according to claim 1, characterized in that: The cone head includes a penetration portion provided at the front end and a connection portion provided at the rear end; The cross-sectional diameter of the penetration portion gradually decreases along the first direction; The connecting portion is connected to the shaft, the diameter of the end surface of the connecting portion connecting to the shaft is equal to the cross-sectional diameter of the shaft, and the cross-sectional diameter of the connecting portion gradually increases along the first direction until it is equal to the diameter of the end surface of the rear end of the penetration portion; The front end surface of the sleeve is arranged obliquely and parallel to the connecting portion.

4. The underwater anchor rod according to claim 3, characterized in that: The penetration portion is a hollow structure, the interior of which is filled with a filler, and the density of the filler is greater than the density of the shaft and the sleeve.

5. The underwater anchor rod according to claim 4, characterized in that: The sleeve is made of galvanized steel, and the shaft is made of galvanized cast iron.

6. The underwater anchor rod according to claim 1, characterized in that: The shaft includes a first explosion groove arranged around the rear end of the shaft, the first explosion groove is provided with a first opening, the first opening passes through the rear end surface of the shaft, and the first explosion groove extends along the axial direction of the shaft; the first explosion part is provided in the first explosion groove.

7. The underwater anchor rod according to claim 1, characterized in that: The sleeve includes a second explosion groove arranged in an annular manner at the rear end of the sleeve. The second explosion groove is provided with a second opening. The second opening passes through the rear end surface of the sleeve, and the second explosion groove extends along the axial direction of the sleeve. The second explosion part is provided in the second explosion groove.

8. The underwater anchor rod according to claim 1, characterized in that: The sleeve further comprises a plurality of tail wings circumferentially arranged on the outer wall of the rear portion of the sleeve.

9. The underwater anchor rod according to claim 1, characterized in that: It also includes a hanging ring, which is fixedly connected to the center of the tail end face of the rod body.

Images