KR101763365B1 - Device for maintaining tension of anchor - Google Patents

Abstract

The present invention relates to an anchor tension maintaining apparatus, and more particularly, to an anchor tension maintaining apparatus capable of maintaining a tension applied to an anchor chain fixed to a submarine even when a water level change is changed, Thereby maintaining the balance of the anchor tension.
The anchor tension maintaining device according to the present invention is an anchor tension maintaining device for maintaining the tension of an anchor connecting chain connecting a subject and an anchor fixed to the bottom of the sea floor, And a fixed sheave fixed to the moving body, wherein the pulling wire is wound around the moving sheave and the pulley of the fixed sheave so as to be reciprocated, and the other end is fixed to the moving sheave or fixed sheave, And an anchor connecting chain connected to the moving pulley.

Description

TECHNICAL FIELD [0001] The present invention relates to an anchor tension maintaining apparatus,

The present invention relates to an anchor tension maintaining apparatus, and more particularly, to an anchor tension maintaining apparatus capable of maintaining a tension applied to an anchor chain fixed to a submarine even when a water level change is changed, Thereby maintaining the balance of the anchor tension.

Vessels such as ships or float bridges are connected by chains to anchors fixed to the bottom of the sea for berth at berth. Figures 1, 2a and 2b illustrate a typical conventional marine floating bridges with maritime anchors. Referring to the drawings, a conventional floating bridge is generally connected to a land jetty F by a piercing bridge 2, which is a floating body 1 floating on the water.

The front end of the body 1 is connected to the land jetty F by a dock connecting chain 3 and the rear end thereof is connected to an anchor 4a fixed to the sea floor by an anchor connecting chain 4, do. The pier coupler chain 3 and the anchor coupler chain 4 are each provided with a pair and are connected to the body 1 in an 'X' shape as shown in FIG.

Since the main body 1 is provided so as to be connected to the land jetty F by a bridle 2 in a marine state where the difference in the number of tides is large, It is preferable that the distance between the supporting body 1 and the land jetty F is kept constant so that the supporting body 1 is not separated from the supporting body 1. [ For this purpose, the dock connection chain 3 and the anchor connection chain 4 are normally loosely sagged so that their weight is heavy, so that tension due to the chain weight is formed in the dock connection chain 3 and the anchor connection chain 4 have.

In the process of moving the supporting body 1 up and down only by the tide interval in a state where the pier connecting chain 3 and the anchor connecting chain 4 are connected as described above, a part of the anchor connecting chain 4 is placed on the sea floor The tension applied to the anchor connecting chain 4 varies depending on the weight change of the anchor connecting chain 4. Figs. 2A and 2B show a state in which the height of the supporting body 1 is changed by the difference in the tide. Fig. 2A shows a state during high tide, and Fig. 2B shows a state during low tide. Referring to FIGS. 2A and 2B, even if the water level changes, there is no change in the tension applied to the dock connection chain 3 because there is no change in the sagging length L11 during high tide and the sagging length L12 during low tide. On the other hand, when the water level rises as in the high tide, the anchor connecting chain 4 is lifted from the sea floor and the length L21 of the water droplet is increased. When the water level falls as in low water level, So that the length L22 in the water is shortened and a change in the tension caused by the weight of the chain is generated in the anchor connecting chain 4. [ The change in the tension described above means a change in the force by which the anchor connecting chain 4 pulls the main body 1 backward and consequently the direction in which the main body 1 faces the quay F And the opposite case is generated. In this case, the main body 1 is moved forward and backward only by the tide of the tide.

In addition, when the tension applied to the anchor connecting chain 4 is unevenly generated on the right and left sides, there arises a problem that the supporting body 1 is tilted or tilted right and left due to unbalanced force applied to the supporting body 1. [

When the body 1 is continuously moved and rotated in the longitudinal and lateral directions and the inclination of the body 1 is continuously repeated, damage is progressed at the portion where the bridges 2 are connected to the body 1, As a result, the breakage of the pier is caused.

In order to cope with the change in the tension of the anchoring wire varying according to the above-mentioned water level change, Korean Patent Laid-Open No. 10-2013-0062683 discloses a small vessel " And an eyepiece equipped with the module.

However, the above-mentioned technique has a disadvantage that it is difficult to apply to a conventional floating bridge which causes a tensile force due to the weight of the chain as well as a complicated structure because the tension is maintained by pulling the wire by the elasticity of the spring by the elasticity of the spring.

Korean Patent Laid-Open No. 10-2013-0062683: Flotation Module for a Vessel for a Small Ship

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to minimize the forward and backward movement of the body by keeping the tension applied to the anchor chain fixed to the sea floor constant, But also to maintain the balance of the anchor tensioner.

In order to accomplish the above object, the present invention provides an anchor tension maintaining apparatus for maintaining tension of an anchor connecting chain connecting a body and an anchor fixed to a bottom of a sea floor, And a fixed sheave fixed to the movable sheave, wherein the pulling wire is wound around the moving sheave and the pulley of the fixed sheave in a reciprocating manner, and the other end is moved in the moving sheave Or pulley winch means fixed to the fixed sheave and to which the anchor connecting chain is connected to the moving sheave.

The anchor tension holding device according to the present invention is characterized in that the pulling wire comprises a first pulling wire having one end connected to the lifting portion and a second pulling wire wound around the pulley winch means, The first pulling wire is wound and loosely connected to the first bobbin, and when the first pulling wire is wound on the first bobbin, the second pulling wire is loosened from the second bobbin, And a relay pulley connected to the second bobbin so that the second pulling wire is wound on the second bobbin when the first pulling wire is unwound from the first bobbin.

Further, in the anchor tension holding device according to the present invention, the diameter of the second bobbin for relaying is larger than the diameter of the first bobbin.

According to the above-described structure, the anchor tension maintaining apparatus according to the present invention can maintain the tension applied to the anchor chain fixing the body to the seabed even when the water level change changes, thereby minimizing the lateral movement of the body, To be maintained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a state where chains are connected to a general floating bridge in a conventional manner;
Figs. 2A and 2B are side views conceptually showing a change in length of a chain due to a change in water level in a general floating bridge
3 is a side view of a floating bridge having an anchor tension maintaining device according to an embodiment of the present invention
4 is a plan view showing a floating bridge having an anchor tension maintaining device according to an embodiment of the present invention.
5 is an enlarged plan view of an anchor tension maintaining apparatus according to an embodiment of the present invention.
6 is a side view of a floating bridge having an anchor tension maintaining device according to an embodiment of the present invention
7 is a front view showing a floating bridge having an anchor tension maintaining device according to an embodiment of the present invention.
8 is a detailed plan view showing a structure of an anchor tension maintaining apparatus according to an embodiment of the present invention.
9 is a side view conceptually showing the operation of the relay pulley in the anchor tension maintaining apparatus according to the embodiment of the present invention
10 is a view conceptually showing a tension relationship in an anchor tension maintaining apparatus according to an embodiment of the present invention

Hereinafter, an anchor tension maintaining apparatus according to the present invention will be described in detail with reference to the drawings and embodiments.

FIG. 3 is a side view showing a floating bridge having an anchor tension maintaining device according to an embodiment of the present invention, FIG. 4 is a plan view showing a floating bridge having an anchor tension maintaining device according to an embodiment of the present invention, FIG. 5 is an enlarged plan view of an anchor tension maintaining apparatus according to an embodiment of the present invention, FIG. 6 is a side view illustrating a floating bridge having an anchor tension maintaining apparatus according to an embodiment of the present invention, and FIG. FIG. 8 is a detailed plan view showing a structure of an anchor tension device according to an embodiment of the present invention, and FIG. 9 is a perspective view showing an anchor tension holding device according to an embodiment of the present invention. FIG. 10 is a side view conceptually showing the operation of a relay pulley in an anchor tension maintaining apparatus according to an embodiment of the present invention. FIG. 10 is a conceptual view showing a tension relationship in an anchor tension maintaining apparatus according to an embodiment of the present invention. Fig.

The anchor tension holding device 10 according to the present invention can be applied to a ship or a floating bridge which is anchored to a wharf. The present invention will now be described in detail with reference to embodiments applied to floating bridges having the same.

The floating body 1 to which the anchor tension holding device 10 according to the present invention can be applied is connected to the land jetty F with the bridge 2 as the floating body 1, Is connected to the land jetty (F) by a dock connecting chain (3), and its rear end is connected to an anchor (4a) fixed to the sea floor by an anchor connecting chain (4) The pier coupler chain 3 and the anchor coupler chain 4 are each provided with a pair and are connected to the body 1 in an 'X' shape as shown in FIG. The body 1 has a structure in which the bottom portion 1a is floated on the water surface to generate buoyancy and the upper portion is covered with the deck 1b.

The anchor tension holding device 10 according to the present invention loosens the anchor connecting chain 4 when the supporting body 1 is lifted by the tide difference tandem and when the supporting body 1 descends, 4) is stretched to minimize the change of the portion of the anchor connecting chain (4) lifted from the floor of the anchor by the anchor connecting chain (4), thereby minimizing the change in the tension due to the weight of the anchor connecting chain (4) And a tension holding device 10 for holding the tension holding device.

The anchor tension holding device 10 according to the present invention includes an auxiliary pulley 11, a movable pulley 12, a fixed pulley 13, a protective space 14, guide rollers 15 and 16, Wires W1 and W2, and a connection wire W3.

The relay pulley 11 is configured to change the pulling and elongating length of the first pulling wire W1 connected to the lifting means such as land or another winch such as the quay F by the vertical lifting of the body 1 And is fixedly installed on each of the front left and right sides of the body 1 in a configuration for switching to a pulled and extended length change of the second pulling wire W2. Referring to FIG. 1, the relay pulley 11 includes a first bobbin 111 having a small diameter and a second bobbin 112 having a large diameter, which are integrally rotated. The first pulling wire W1 is wound and loosely connected to the first bobbin 111 and the second pulling wire W2 is wound and loosely connected to the second bobbin 112. [ 9 is a conceptual view showing a structure in which the first pulling wire W1 is connected with the pier F as a lifting portion and the first pulling wire W1 and the second pulling wire W2 are wound on the relay pulley 11 Respectively. The first pulling wire W1 connected to the wharf F which is kept fixed on the land because the body 1 moves away from the wharf F when the body 1 descends during low tide Is pulled by the quay (F), and the length of the first bobbin 111 is loosened (B11) as shown in FIG. 9 (a). When the first pulling wire W1 is unwound (B11) from the first bobbin 111 as described above, the second pulling wire W2 is wound on the second bobbin 112 (B21) Lt; / RTI > On the other hand, when the body 1 is lifted at the time of high tide, the first pulling wire W1 connected to the quay F is relaxed loosely because the body 1 is close to the quay F, As shown in FIG. 9 (b), the length of the first bobbin 111 is shortened while the first bobbin 111 is wound. As described above, when the first pulling wire W1 is wound on the first bobbin 111 (B12), the second pulling wire W2 is released from the second bobbin 112 (B22). As a result, the first pulling wire W1 and the second pulling wire W2 pull the movable sheave 12 connected to the second pulling wire W2, and the first bobbin 111 and the second bobbin 112 The length of the first pulling wire W1 and the pulling force of the second pulling wire W2 are pulled and the tension applied to the wire is changed. 8, the ratio r1: r2 = 1: 2 between the radius r1 of the first bobbin 111 and the radius r2 of the second bobbin 112 is shown in the figure, The second pulling wire W2 is pulled and unwound by twice the length of pulling or loosening of the first pulling wire W1 by the relay of the relay pulley 11, The tension T2 applied to the wire W2 is 0.5 times the tension T1 applied to the first pulling wire W1. That is, r2 = 2 * r1 and T2 = 0.5 * T1 are satisfied.

One end of the first pulling wire W1 is connected to a lifting portion (not shown in the figure) and the other end is connected to a first bobbin 111 of the relay pulley 11, It is wound around the bobbin 111 and released. The lifting portion pulls the first pulling wire W1 when the anchor connecting chain 4 is loosened due to the lowering of the body 1 and conversely the anchor connecting chain 4 is pulled up by the lifting of the body 1, And is configured to relax the first pulling wire W1 when it is pulled tightly. The first pulling wire W1 is connected so that a land jetty F in which the altitude (height) does not change at all by the tilt of the lifting portion serves as a lifting portion, An embodiment is shown in which one pulling wire W1 is strained or loosened. However, the present invention can be configured such that the first pulling wire W1 is connected to a separate lifting means such as a winch as shown in the drawing.

One end of the second pulling wire W2 is connected to the second bobbin 112 of the relay pulley 11 and is wound and unwound on the second bobbin 112. [

On the other hand, in the figure, the first pulling wire W1 and the second pulling wire W2 are configured such that the tension is changed from T1 to T2 by the relay pulley 11, but when the change of the tension is not required, The first pulling wire W1 and the second pulling wire W2 can be directly connected without passing through the relay pulley 11 (or the first pulling wire and the second pulling wire can be integrally connected).

The pulley winch means constituted by the moving pulley 12 and the fixed pulley 13 is wound on the moving pulley 12 by winding the second pulling wire W2 to increase the tension T2 of the second pulling wire W2 To the connected anchor connecting chain (4). 10 conceptually shows a state in which the second pulling wire W1 is wound around the moving pulley 12 and the fixed pulley 13. Referring to Fig. 10, the second pulley wire W1 is connected to the second pulley wire 2, The pulling wire W2 extends rearward from the front of the body 1 in the lengthwise direction of the body 1 and is wound once on one of the pulley pulleys 121 of the moving pulley 12, Of the pulley 121 of the moving pulley 12 and the other of the pulley pulleys 121 of the moving pulley 12 is extended to the rear side of the pulley 121 of the moving pulley 12 by being once wound around the pulley 131 of the fixed pulley 13 fixed to the body 1, And then the other end is connected to the fixed sheave 13. The fixed sheave 13 is connected to the fixed sheave 13, The movable sheave 12 is moved forward or backward along the longitudinal direction of the body 1 in accordance with a change (or change in length) of the tension T2 of the second pulling wire W2, Thus, the anchor connecting chain (4) connected to the connecting portion (122) of the moving sheave (12) is pulled or loosened. The fixed pulley 13 is fixed to the main body 1 by the fixing portion 132 so as to switch the direction of the second pulling wire W2. 10, since the same tension is applied to the second pulling wire W2, when the second pulling wire W2 is wound twice on the moving pulley 12 as shown in FIG. 10, A force corresponding to 4 times is applied. As a result, a tensile force T3 corresponding to four times of T2 is applied to the anchor connecting chain 4 connected to the moving sheave 12. This can be summarized as follows.

T3 = 4 * T2 = 4 * (0.5 * T1) = 2 * T1

In the figure, the second pulling wire W2 is wound around the moving pulley 12 twice. However, the present invention is not limited to this, and the number of turns may be selected as necessary. In the drawing, the anchor connecting chain 4 is not directly connected to the moving sheave 12, one end of the connecting wire W3 is connected to the connecting portion 122 of the moving sheave 12, Although the embodiment is shown connected to the connection chain 4, the connection wire W3 can be eliminated if necessary.

The resultant force (T1 + T4) of the tension T1 caught by the first pulling wire W1 and the tension T4 caught by the pier coupling chain 3 is applied to the front of the body 1 to hold the body 1 forward And the main body 1 is pulled backward by the tension T3 caught by the anchor connecting chain 4 connected to the rear of the main body 1 to form a balance. That is, the equilibrium of force by the following equation is achieved.

T1 + T4 = T3 = 2 * T1 (tension pulling the body backwards)

The first pulling wire W1 is pulled by the quay F and is pulled by the second pulling wire W2 while being unwound by the relay pulley 11, The first pulling wire W1 is loosened and wound on the relay pulley 11 when the main body 1 is lifted at the time of high tide, The anchor connecting chain 4 is released by releasing the anchor connecting chain 4 by the second pulling wire W2. As a result, the length of the anchor connecting chain 4 is maintained constant in the water, and as a result, the tension T3 applied to the anchor connecting chain 4 is kept constant. The process of keeping the tension on the anchor connecting chain 4 as described above will be described in detail as follows. The first pulling wire W1 is unwound from the first bobbin 111 so that the second pulling wire W2 is wound on the second bobbin 112 and the second pulling wire W2 Is pulled so that the movable sheave 12 is pulled. The pulling of the movable pulley 12 by the second pulling wire W2 means that the second pulling wire W2 pulls the anchor connecting chain 4. That is, at the time of low altitude, the portion of the anchor connecting chain 4 lying on the bottom of the sea floor increases due to the descent of the body 1, thereby reducing the swinging length of the anchor connecting chain 4 in the water. The swinging length is increased inversely by pulling the anchor connecting chain 4 by the moving sheave 12 so that the swinging length of the anchor connecting chain 4 is kept constant.

Conversely, when the body 1 is lifted, the first pulling wire W1 is wound on the first bobbin 111 so that the second pulling wire W2 is unwound from the second bobbin 112, The wire W2 becomes long and the moving sheave 12 is moved backward. The movement of the movable sheave 12 to the rear means that the anchor connecting chain 4 is loosely relaxed. That is, at the time of high tide, the portion of the anchor connecting chain 4 lying on the bottom of the sea floor decreases due to the rise of the main body 1, while the length of the anchor connecting chain 4 is increased in the water. The swinging length of the anchor connecting chain 4 is reduced by reversely rotating the moving sheave 12 by releasing the anchor connecting chain 4 so that the swinging length of the anchor connecting chain 4 is kept constant.

The protective space 14 is configured to receive and protect the relay pulley 11, the fixed sheave 12, the moving sheave 13 and the pulling wires W1 and W2. Referring to FIG. 1, the protection space 14 is disposed at the left and right sides of the lower portion of the deck 1b of the body 1, and is formed long in the longitudinal direction of the body 1. The relay pulley 11, the fixed pulley 12, the moving pulley 13 and the pulling wires W1 and W2 are accommodated in the protective space 14.

The guide rollers 15 and 16 are installed at the front entrance and the rear entrance of the protective space 14 to respectively support the first pulling wire W1 and the connecting wire W3 in a reversed direction. The first pulling wire W1 is supported by the guide roller 15 provided at the front entrance of the protective space 14 and is pulled out from the front entrance of the protective cover 14 to be pulled out from the pier F . The connecting wire W3 connecting the anchor connecting chain 4 with the moving sheave 12 is supported by the guide roller 16 provided at the rear entrance of the protection space 14, Is drawn out from the inlet and connected to the anchor connecting chain (4).

The tension retention device described above and shown in the drawings is only one embodiment for carrying out the present invention and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the following claims, and the embodiments improved and changed without departing from the gist of the present invention are obvious to those having ordinary skill in the art to which the present invention belongs It will be understood that the invention is not limited thereto.

F Pier
1 body
1a
1b deck
2 piers
3 Pier connection chain
4 Anchor connection chain
4a anchor
10 Anchor tensioner
11 relay pulley
111 1st bobbin
112 second bobbin
12 moving pulleys
121 pulley pulley
122 connection
13 Fixed Pulley
131 pulley pulley
132 fixed portion
14 Protective cover
15, 16 guide rollers
W1, W2 First and second pulling wires
W3 connection wire

Claims (3)

delete An anchor tensioning device for maintaining tension of anchor connecting chain connecting anchor and anchors fixed to a bottom of an underside,
A pulling wire having one end connected to the lifting portion and pulled and relaxed,
And a fixed sheave fixed to the body, wherein the pulling wire is wound on the movable pulley and between the movable sheave and the fixed sheave, and the other end is fixed to the movable sheave or the fixed sheave, And a pulley winch means having a chain connected to the moving pulley,
Wherein the pulling wire comprises a first pulling wire having one end connected to the lifting portion and a second pulling wire wound on the pulley winch means,
Wherein the first bobbin and the second bobbin are integrally rotated so that the first bobbin is wound and loosely connected to the first bobbin and when the first pulling wire is wound on the first bobbin, Further comprising a relay pulley which is loosened in the second bobbin and in which the second pulling wire is connected to the second bobbin so that the second pulling wire is wound on the second bobbin when the first pulling wire is unwound from the first bobbin, And an anchor tension holding device. 3. The method of claim 2,
And the diameter of the second bobbin is larger than the diameter of the first bobbin.

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