KR101563971B1 - Non-contact power swivel maintaining stationarity - Google Patents

Abstract

A non-contact power swivel in which steady state is maintained is started. The non-contact type power swivel according to an embodiment of the present invention includes a first coil connected to a floating structure and rotatable together with the floating structure, a first coil receiving a current from a power supply unit disposed in the floating structure, A current is induced by a magnetic field formed in the first coil part to supply the induced current to the turret side, A tilting judgment unit for detecting whether the tilting of the first coil part and the second coil part is tilted or not and calculating a tilted angle based on the tilting sensed by the tilting judgment part And a driver for tilting the first coil part.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a non-contact power swivel,

The present invention relates to a non-contact power swivel that maintains steady state.

Generally, a drill ship or FPSO (floating oil production and storage facility) drilling gas or crude oil from the seabed is equipped with a turret to assist drilling.

The turret is usually mounted in a vertical opening or moon pool at one end of the ship, usually at the forefront, and secured to the subsea well platform by a chain or the like, thereby mooring the vessel.

Further, the turret is installed so that the ship can rotate around the turret. In other words, the turret is fixed to the platform of the submarine channel, and a sliding bearing is interposed between the turret and the vertical opening (the portal) of the ship, so that the ship can rotate naturally around the turret by the action of wind, have. This allows the gas or crude oil to be stably transported to the ship side through a pipe or the like in the fixed turret, even if wind, tide or wave acts during the drilling operation.

The turret may be provided with a swivel stack including a plurality of swivels. Each swivel is placed vertically, like a tower, and the drilled gas or crude oil can be transferred to each part of the ship through this swivel stack. Each swivel is connected to the turret so that the inner side is fixed like a turret, and the outer side is connected with the hull so that it can rotate together with the ship when the ship rotates around the turret.

In general, a torque arm is connected to the outer side of the swivel, so that when the outer side of the swivel rotates together with the ship, the load is not transmitted to the piping connection site, so that the outer side of the swivel can rotate easily .

On the other hand, the turret may be equipped with a variety of equipment requiring power. For example, a winch, a lighting device, a thermal device, various sensors, and the like can be installed in each part of the turret, and a method of supplying electric power to them is required.

Currently, the slip-ring method is the most widely used. That is, by using a specific swivel of the swivel stack as a slip ring (or employing a slip ring for a specific swivel), the inner stator of the slip ring is connected to the turret, and the outer rotor of the slip ring is connected to the hull. When the ship rotates about the turret, the inner stator of the slip ring is fixed while the outer rotor can rotate around the inner stator. This allows the power applied to the external rotor to be transmitted to the internal stator and then to the various devices of the turret.

However, since the slip ring type power transmission method as described above transmits electric power by the physical contact between the inner stator and the outer rotor, when the ship rotates around the turret, it necessarily involves abrasion due to friction I can not help it. Therefore, periodic maintenance work is required to solve this problem. In addition, when the contact point between the rotor and the stator of the slip ring drops due to the instantaneous movement of the ship, there is a possibility that a spark occurs, and there is a high possibility that gas, vapor, and the like are present around the slip ring, .

US Patent Application Publication No. 7806708

An embodiment of the present invention is to provide a non-contact power swivel capable of supplying power to a turret in a non-contact manner.

The embodiments of the present invention are also intended to provide a non-contact power swivel which is free from the risk of abrasion or sparking due to friction.

Further, the embodiment of the present invention is to provide a non-contact type power swivel which is easy to maintain.

Further, an embodiment of the present invention is intended to provide a non-contact power swivel that maintains steady state.

According to an aspect of the present invention, there is provided a non-contact type power swivel in which a steady state is maintained, the non-contact type power swivel being rotatable together with the floating structure and being connected to the floating structure, And a current is induced by a magnetic field formed in the first coil part, and the induced current is transmitted to the turret side A tilting judging unit for detecting a tilting angle between the first coil part and the second coil part and calculating an inclined angle based on the tilting sensed by the tilting judger, And a driver for tilting the first coil part.

In addition, the portion of the first coil portion where the coil is wound and the portion of the second coil portion where the coil is wound may be arranged in parallel with each other in a steady state.

The tilting determination unit senses a change in the distance between the first coil part and the second coil part as the tilting is performed, and then, based on the change in the distance, It is possible to calculate the tilt angle and the tilt angle.

The tilting determination portion may include a first elastic body having one end and the other end connected to the second coil portion and the floating structure and being compressed when the second coil portion is tilted, And a second elastomeric body connected to the floating structure and extending when the second coil part is inclined and a second elastomeric body having a length difference between the first elastic body and the second elastic body, And an operation unit for determining whether or not the vehicle is running.

The tilting determination unit may be disposed between the first coil part and the second coil part to be in contact with both the first coil part and the second coil part and arranged on the same vertical plane, A first contact member and a second contact member disposed at a position spaced a predetermined distance apart from each other in a mutually opposite direction from a vertical center point of the first contact member and the second contact member, And an operation unit for detecting whether the second coil part tilts according to an increase or decrease in the pressure sensed by the pressure sensing body and the pair of pressure sensing bodies and calculating an inclined angle.

Further, the driving unit may include a plurality of actuators disposed under the first coil part, and the first coil part may be inclined by varying the degree of advancement and retraction of each of the plurality of actuators.

According to the embodiment of the present invention, it is possible to provide a non-contact type power swivel capable of supplying power to the turret in a non-contact manner.

Further, it is possible to provide a non-contact type power swivel which is free from the risk of abrasion or sparking due to friction.

Further, it is possible to provide a non-contact type power swivel which is easy to maintain.

Further, it is possible to provide a non-contact type power swivel which maintains the steady state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows the construction of a general swivel stack; FIG.
2 is a view illustrating the inside and outside of the center of a non-contact type power swivel according to an embodiment of the present invention.
Figures 3 to 5 schematically illustrate a non-contact power swivel according to another embodiment of the present invention.
6 is a schematic illustration of a non-contact power swivel according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a non-contact power swivel according to embodiments of the present invention will be described as being provided on a turret installed in a ship, but the present invention is not limited thereto. The non-contact power swivel according to embodiments of the present invention can be equally applied to various floating structures such as an offshore plant as well as a ship.

Further, the non-contact power swivel according to embodiments of the present invention may be disposed at the upper end of the swivel stack of the turret, or may be disposed at the middle portion rather than the upper end. In addition, the non-contact power swivel according to embodiments of the present invention may be located at a location other than the turret.

Before describing the present invention in more detail, the operation of the ship centered on the turret and the turret will be described.

Turrets may be equipped with floating structures that drill gas or crude oil from the seabed, such as drill rigs or FPSO (Floating Crude Oil Production Cargo Storage Facility). It may be divided into an internal turret or an external turret depending on where the hull is located.

The turret allows the ship to freely rotate about the turret when the ship flows by the action of wind, tide or wave while the gas or crude oil is being transported. The gas or crude oil, It can be stably transported to the ship side through the piping of the ship. For example, there is no possibility that various pipes such as a riser are caught by the flow of the ship.

In the case of an inner turret, a vertical opening (a portal) through the hull can be formed inside the vessel, and the turret can be installed in such a vertical opening. The vertical opening may be provided with a plurality of bearings such that the hull is rotatable about the turret. That is, the one side and the other side of each bearing can contact the hull and the turret, respectively, to perform rolling motion, thereby helping to smoothly implement the relative rotational movement of the hull and the turret.

The turret may comprise a bottom turret, a top turret, a piping deck, a mezzanine deck, a gantry crane, and the like, in the above order from below. Gantry cranes are equipment for the unloading of drilled gas or crude oil. Swivel stacks and utility pipes connected to the gantry crane can be installed in the support structure of the gantry crane. Utility pipes can be supported by piping decks and mezzanine decks, one side can be connected to each part of the vessel and the drilled crude oil or gas can be transferred to each part of the vessel. The other side of the utility pipe can be connected to a riser installed in the turret. The riser is connected to a submarine block platform so that the gas or crude oil from the block can be transferred to the utility pipe through the riser.

1 is a view schematically showing the construction of a general swivel stack.

As shown, the swivel stack has a plurality of swivels arranged in the vertical direction. The bottom-most swivel may be a production swivel 10. It can receive crude oil or gas from a riser installed in the turret and transfer it to the hull via a utility pipe. Above the production swivel 10 there are a water injection swivel 20, a fire water swivel 30, a gas lift and injection swivel 40, a utility swivel 50, 60, Various swivels can be arranged. As such, each swivel included in the swivel stack performs its function and can safely transport crude oil or gas drilled from the seabed to the hull.

Meanwhile, as shown in FIG. 1, power is supplied to the turret including the swivel stack through the slip ring 70 in the conventional case. The slip ring 70 is typically disposed at the upper end of the swivel stack and is connected to the torque arm 71 connected to the hull 1 so that the outer rotor of the slip ring 70 can rotate with the ship, Because it is connected to the turret, it does not rotate with the ship when the ship rotates.

As described above, in such a slip ring type power supply structure, since the rotor and the stator of the slip ring 70 are in contact with each other, when the ship rotates around the turret, problems such as abrasion due to friction May occur. In addition, if the contact between the rotor and the stator is dropped due to the momentary movement of the ship, sparks may occur and a fire risk may occur. Therefore, as described below, a non-contact type power swivel capable of supplying power to the turret side without such a problem even when the ship rotates around the turret has been devised.

FIG. 2 is a view illustrating the inside and outside of the non-contact type power swivel 100 according to the embodiment of the present invention.

2, the non-contact type power swivel 100 according to the present embodiment includes two first coil portions 120 disposed at both sides of the second coil portion 120 with the second coil portion 120 at the center, However, the present invention is not limited thereto, and the first coil portion may be provided as one or more than three.

The first coil portion 110 is disposed on one side of the second coil portion 120 and may be spaced a predetermined distance from the second coil portion 120. The other first coil part 111 is also disposed on the other side of the second coil part and can be spaced apart from the second coil part 120 by a predetermined distance.

The first coil parts 110 and 111 may have a C-shaped cross-section, and the first coil 115 and 116 may be wound on the middle vertical member. In addition, the second coil part 120 may include a disc member at the upper and lower ends and a cylindrical member at the center, and the second coil 125 may be wound around the cylindrical member.

The first and second coils 115 and 116 and the second coil 125 wound on the first coil part 110 and the second coil part 120 respectively have through holes 135 formed in the first case 130 Through the through hole 145 formed in the second case 140 and the non-contact type power swivel 100, or may be discharged to the outside. The through holes 135 and 145 will be described later.

2, the cross-sectional shape of the first case 130 may be a cross-sectional shape, and the cross-sectional shape of the first cross-sectional shape may extend 360 degrees about the central portion of the non-contact type power swivel 100, A hollow portion may be formed inside and an upper portion may be opened. However, the center of the lower surface of the first case 130 may penetrate, and the second case 140 may be disposed at the penetrating portion as described later to support the second coil portion 120.

In this embodiment, the first case 130 having the above-described shape can support the lower end portion and the side portion of the first coil portion 110. For example, as shown in FIG. 2, a lower horizontal member of the first coil portion 110 of the C shape can be supported from below, and a central vertical member of the C shape first coil portion 110 And can be supported from the outside to the inside of the non-contact power swivel 100.

Since the first coil 115 can be wound on the center vertical member of the first coil part 110, the part where the first coil 115 is wound on the first coil part 110 can be wound around the first case 130 You may not touch them directly. In this case, one ends of a plurality of insulators (not shown) are connected to a plurality of points of the first coil part 110, respectively, and the other ends of the plurality of insulators are connected to inner surfaces of the first case 130 The first coil part 110 can be completely supported by the first case 130 and can be fixed to the corresponding position and can not be moved even during the rotation operation.

The first case 130 is in direct contact with the lower end of the first coil part 110 to support the first coil part 110. However, An insulator may be interposed between the cases 130 as well.

The second case 140 can support the second coil part 120. In this embodiment, the second coil part 120 is disposed at the center of the non-contact type power swivel 100, 140 may form a lower center portion of the non-contact type power swivel 100.

The second case 140 is embodied as a disk in this embodiment and can act to support the lower end of the second coil part 120 from below. An insulator may be interposed between the second coil part 120 and the second case 140, as in the case of the first coil part 110 and the first case 130.

Meanwhile, other swivels of the swivel stack may be positioned under the first case 130 and the second case 140, and an upper turret, a lower turret, and the like may be disposed below the other swivels. As will be described later, the first case 130 is connected to the hull so that the first case 130 can rotate together with the ship when the ship rotates about the turret. The second case 140 may be connected to the turret so that the second case 140 may not rotate as the turret rotates about the turret.

The cover 150 may be a disc. The cover 150 may cover the upper end of the first coil part 110 and the second coil part 120 after the first coil part 110 and the second coil part 120 are disposed in the non-contact type power swivel 100. [ The cover 150 and the first coil part 110 may be spaced apart from each other by an insulator interposed between the cover 150 and the upper end of the first coil part 110. Meanwhile, in the present embodiment, the upper end of the second coil part 120 may be spaced apart from the cover 150 by a predetermined distance.

On the other hand, the non-contact power swivel 100 may be located at the top (or top) of the swivel stack. However, the present invention is not limited thereto, and other swivels may be arranged above the non-contact type power swivel 100. [ Accordingly, the upper surface of the cover 150 can be connected to another swivel. Further, as will be described later, the cover 150 is connected to the hull so that it can rotate together with the ship when the hull rotates about the turret.

Referring to FIG. 2, it can be seen that the lower end of the first case 130 and the end of the second case 140 are not in direct contact with each other. As mentioned above, the first case 130 and the cover 150 are connected to the hull so as to rotate together with the ship, while the second case 140 does not rotate together with the ship. Accordingly, the first case 130 and the second case 140 can rotate relative to each other. In order to smoothly support the first case 130 and the second case 140, the lower end of the first case 130 and the end of the second case 140 A bearing portion 170 may be disposed between the first and second bearings.

The bearing portion 170 may support the relative rotation of the first case 140 and the second case 150.

Hereinafter, an operation of the non-contact type power swivel 100 according to the present embodiment will be described.

The power supply unit 1000 disposed on the ship can apply current to the first coil part 110, more specifically, the first coil 115 of the first coil part 110. [ The current flowing along the first coil 115 wound on the first coil part 110 can form a magnetic field on the first coil part 110 and the second coil part 115 disposed adjacent to the first coil part 110, A magnetic field in a direction opposite to the magnetic field formed in the first coil part 110 may be induced in the part 120. [ According to the induced magnetic field, a current can be induced to flow through the second coil 125 of the second coil part 120. [ The current induced in the second coil 125 can be used to operate various turret loads 2000 (e.g., winches, illuminators, heaters, sensors, etc.) supplied to the turret side and located in the turret.

On the other hand, when the ship rotates about the turret, since the first coil part 110 is connected to the ship, it rotates together with the ship. On the other hand, since the second coil part 120 is connected to the turret, It is fixed without rotating together. That is, the first coil part 110 and the second coil part 120 can also rotate relative to each other, and if the first coil part 110 and the second coil part 120 are rotated according to the present embodiment, The current can be induced in the second coil part 120. Therefore, unlike the conventional slip ring, even when the ship rotates, there is no possibility of causing problems such as abrasion due to friction between the rotor and the stator. As a result, the rotor and the stator are not in contact with each other, so there is no possibility of sparking due to the momentary disconnection of the rotor and the stator.

The inner space 180 of the non-contact type power swivel 100 partitioned by the first case 130, the second case 140, the bearing part 170, and the cover 150 may be filled with insulating oil. The first coil portion 110 and the second coil portion 120 can be kept apart from each other by a predetermined distance by the insulating oil.

As described above, a plurality of through holes 135 and 145 may be formed in the first case 130 and the second case 140, respectively. The through holes 135 and 145 may provide a passage through which the first coil 115 and the second coil 125 are drawn into or out of the non-contact type power swivel 100. The through holes 135 and 145 are formed in the first case 130 and the second case 140 so that both ends of the first coil 115 and the second coil 125 can be separately inserted and discharged, Respectively.

The through holes 135 and 145 may be separated from the first coil 115 or the second coil 125 by a separate sealing member. For example, it is possible to prevent the access of various flammable substances and moisture which may cause a fire, thereby improving the operational stability. In addition, when the inner space of the non-contact type power swivel 100 is filled with the insulating oil, it may prevent the leakage of the insulating oil.

Hereinafter, a situation in which the first coil portion and the second coil portion are inclined at a predetermined angle with respect to each other will be described. The turret is fixed to the bottom of the underwater hole and can be supported by the bearing part installed in the vertical opening of the ship. However, the turret can be tilted at a certain angle with respect to the ship by the effect of instantaneous winds and waves.

Thus, when the turret is inclined, the second coil portion connected to the turret is also inclined together. In this state, the separation distance between the first coil portion and the second coil portion may be changed, and the power supply efficiency may be deteriorated. In addition, when the tilting is severe, the first coil part and the second coil part may be in contact with each other, which may cause problems as in the prior art.

Thus, as described above, the following embodiments relate to a non-contact power swivel where stationarity can be maintained, where steady state means that the first coil part and the second coil part maintain an initial steady state That is, the first coil part and the second coil part are parallel to each other, and the distance between them is kept the same.

In the following description, it is assumed that the second coil portion is inclined with respect to the first coil portion. However, the present invention is not limited thereto, and the first coil portion may be inclined with respect to the second coil portion. The present invention is equally applicable. For example, while the turret is fixed to a submarine block platform, the vessel can be instantaneously tilted with respect to the turret by the action of wind or wave.

The non-contact power swivel according to the present invention includes an inclination determining unit that determines whether a tilting occurs and a tilting degree when a relative tilting occurs between a first coil part and a second coil part, And a driver capable of tilting any one of the first coil part and the second coil part that is not tilted based on the information on the tilt angle and the inclination detected by the tilting determination part have. Therefore, relative tilting between the first coil part and the second coil part that can occur instantaneously by the action of wind or wave can be prevented and the steady state can be maintained, so that the occurrence of a problem due to the tilting can be prevented in advance.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 3 to 6, other elements such as the first and second cases, the cover and the like are omitted for clearly showing the tilting relationship between the first coil part and the second coil part, and the first coil part, The second coil part and the driving part are mainly shown.

3 is a schematic view of a non-contact power swivel 200 according to another embodiment of the present invention. In this embodiment, the tilting of the second coil part 220 can be prevented by using the restoring force of the elastic body. In other words, when the second coil part 220 tends to tilt through the elastic body between the second coil part 220 and the hull, the elastic body acts to restrain the second coil part 220, 220 to return to the home position. In addition, when it is difficult to position the second coil part 220 just by the restoring force of the elastic body, the first coil part 210 may be tilted and disposed parallel to the second coil part 220.

Referring to FIG. 3, it can be seen that the second coil part 220 tilts in a counterclockwise direction. The first elastic body 290 and the second elastic body 291 may be interposed between the upper surface of the hull 1 and the upper surface of the second coil section 220. In this embodiment, Specifically, one end and the other end of each of the first elastic body 290 and the second elastic body 291 may be respectively connected to the upper surfaces of the hull 1 and the second coil part 220. The first elastic body 290 and the second elastic body 291 may be disposed symmetrically with respect to the center of the second coil part 220.

3, the first elastic body 290 connected to the left side of the upper surface of the second coil part 220 (left side with respect to the center) is compressed The length of the second coil part 220 can be shortened, and thus the compression restoring force in the direction of the left arrow can be provided to the second coil part 220. The second elastic body 291 connected to the right side of the upper surface of the second coil part 220 (right side with respect to the middle part) is elongated and can be extended in length, The tensile restoring force in the direction of the arrow can be provided.

As the first elastic body 290 on the left side pushes the second coil portion 220 in the direction opposite to the tilting direction and the second elastic body 291 on the right side pushes the second coil portion 220, The inclination of the second coil portion 220 can be prevented.

Fig. 4 is a perspective view (a) and a sectional view (b) showing the configuration not shown in Fig. 3 in the embodiment of Fig. As shown, the second coil part 220 may include a column 220a, an upper plate 220b, and a lower plate (not shown). The columnar portion 220a may have a cylindrical shape, and the upper plate 220b and the lower plate may be in the form of a disk. Here, on the upper surface of the upper plate 220b, the receiving portion may be formed as a circular depression, and a disk-shaped rotary portion 225 may be disposed in the circular receiving portion. The diameter of the rotation part 225 may be smaller than the diameter of the circular receiving part and a bearing member 226 contacting both the rotation part 225 and the receiving part may be disposed in the space between the rotation part 225 and the receiving part . The bearing member 226 is not limited as long as it can smoothly support the relative rotation between the rotation part 225 and the upper plate 220b of the second coil part 220 such as a roller bearing and a ball bearing. Both ends of the elastic members 290 and 291 may be connected to the cover 250 and the rotation unit 225, respectively.

As described above, the second coil part 220 does not rotate when the hull 1 rotates, but the cover 250 can rotate together with the hull 1 because it is connected to the hull 1 side. Therefore, one end of the elastic members 290 and 291 connected to the cover 250 can rotate together with the hull 1. One end of the elastic body 290 or 291 rotates together with the hull 1 and the other end rotates together with the second coil part 220 according to the rotation of the hull 1 unless the rotary part 225 and the bearing member 226 are included, The elastic members 290 and 291 may be twisted or broken. However, in this embodiment, the other end of the elastic members 290 and 291 can be connected to the rotation part 225, and the bearing member 226 is interposed between the rotation part 225 and the upper plate 220b, The rotation part 225 can also rotate together. Therefore, the possibility of twisting or breakage of the elastic members 290 and 291 can be eliminated.

However, it may be difficult to return the second coil part 220 to the correct position only by the restoring force of the elastic members 290 and 291 according to the degree of inclination and the tilting speed. That is, since the tendency of the second coil part 220 to tilt is greater than the restoring force of the elastic members 290 and 291, it is difficult to prevent the second coil part 220 from tilting only by the elastic members 290 and 291, The second coil part 220 may not be positioned properly but may be tilted together with the first coil part 220 in a situation where breakage may occur at the connection part of the second coil part 220 with the turret .

For example, the non-contact power swivel 200 may include a tilt determination unit and a driving unit. Here, the tilting determination unit can detect whether the second coil unit 220 is tilted or not, and calculate the tilted angle.

In the case of the present embodiment, the inclination determining section may be exemplified as including a first elastic body 290, a second elastic body 291, and a calculation section. The first elastic member 290 and the second elastic member 291 are as described above and the operation unit can calculate the length difference between the first elastic member 290 and the second elastic member 291 . In the case of the above example, the first elastic body 290 is compressed and the second elastic body 291 is extended, both of which will have a length difference. The operation unit can sense that the second coil part 220 is inclined by grasping the difference in length itself between the first elastic body 290 and the second elastic body 291. It is also possible to determine to what degree (at what degree) the second coil part 220 is tilted by the degree of the difference in length between the first elastic body 290 and the second elastic body 291. It is also possible to determine whether the second coil part 220 can be positively positioned only by the restoring forces of the elastic members 290 and 291 based on the difference in length between the first elastic body 290 and the second elastic body 291, It can be determined whether it is desirable to tilt the first coil section 210 to maintain steady state. These criteria can be previously set in advance in consideration of the weight, mechanical relationship, and the like of each member, and input and stored in the operation unit.

Such an arithmetic unit may include known length measuring means of various types capable of measuring the lengths of the elastic members 290 and 291 and the length of the elastic members 290 and 291 in the steady state and the lengths of the elastic members 290 and 291 And information such as the angle change of the elastic bodies 290 and 291 and the second coil part 220 according to the change of the length of the elastic body 290 and 291 can be stored in advance. And a calculation device capable of calculating the tilted angle of the second coil part 220 using the length information of the actually measured elastic members 290 and 291.

As described above, when the first coil part 210 needs to be tilted by a difference in length between the first elastic body 290 and the second elastic body 291 exceeding a preset reference, the driving part moves the first coil part 210 It can be tilted. For example, the driving unit may include a plurality of actuators 215 and 216, which may be continuously arranged along the horizontal direction with reference to Fig. The first coil part 210 can be tilted by different advancement and retraction of the plurality of actuators 215 and 216, respectively. For example, when the first coil part 210 is tilted in the counterclockwise direction, the actuator 215 on the left side in Fig. 3 can maintain the initial state or can be retreated downward, and the actuator 216 on the right side can be moved upward You can advance.

The coil portion of the first coil portion 210 and the second coil portion 220, more specifically the coil portion of the first coil portion 210 and the coil of the second coil portion 220, And the distance between the first coil part 210 and the second coil part 220 can be maintained to be the same. This can be seen in FIG.

The inclination determination method using the optical sensor is also shown in FIG. As shown in FIG. 3, the optical sensors 80 and 81 may be attached to the first coil part 210 and the second coil part 220, respectively, The distance between the first coil part 210 and the second coil part 220 can be calculated. The distance between the optical sensors on both sides can be narrowed as the second coil portion 220 is tilted so that the optical sensors 80 and 81 can be positioned between the first coil portion 210 and the second coil portion 220 ) Of the second coil part 220 can be detected based on the distance information and the angle of inclination of the second coil part 220 can be calculated based on the distance information. For example, the optical sensors 80 and 81 may be provided in a plurality of locations and may be spaced apart from each other along the height direction of the first coil part 210 and the second coil part 220, respectively. The first and second coil parts 210 and 220 are vertically arranged in the initial steady state and are horizontally aligned with respect to each other, and the plurality of optical sensors are arranged on the first coil part 210 and the second coil part 220, Information regarding which point (height relation) of the coil part 220 is disposed can be stored. When the second coil part 220 is inclined counterclockwise, for example, a decrease in the spacing distance is detected in the upper optical sensor set and an increase in the spacing distance is detected in the lower optical sensor set . The operation unit compares the change information of the distance sensed by each of the plurality of optical sensors spaced apart along the height direction of the first coil part 210 and the second coil part 220, The angle of inclination of the second coil part 220 can be calculated by comparing the posture of the second coil part 220 with the initial steady state of the second coil part 220. [

In addition, a tilt angle of the second coil part 220 may be determined by using various tilt sensors capable of detecting and measuring a tilt, such as a gyroscope sensor and an accelerometer.

6 is a schematic view of a non-contact power swivel 300 according to another embodiment of the present invention. In this embodiment, a pressure acting between the first coil part 310 and the second coil part 320 is sensed to determine how much the second coil part 320 is inclined in which direction depending on whether the pressure is increased or decreased And it is possible to maintain the steady state by inclining the first coil part 310 according to the detected result.

Referring to FIG. 6, the inclination determining unit according to the present embodiment may include a first contact member 390 and a second contact member 391. The first contact member 390 and the second contact member 391 are interposed between the first coil part 310 and the second coil part 320 so that both ends of the first contact part 390 and the second contact part 391 are connected to the first coil part 310, (Not shown). Each of the first contact member 390 and the second contact member 391 may be spaced apart from each other by a predetermined distance in the vertical direction from the vertical center point of the second coil section 320 and may be disposed on the same vertical plane .

The tilting determination unit according to the present embodiment may also include an operation unit. The operation unit can sense a change in pressure acting on the first contact member 390 and the second contact member 391 and can sense that the second coil part 320 is tilted. In this process, a pressure sensor s connected to each of the first contact member 390 and the second contact member 391 may be used. Further, a pressure sensor s connected to each of the first contact member 390 and the second contact member 391 (At what degree) the degree of the second coil part 320 is inclined by the degree of increase / decrease of the pressure applied to the second coil part 320. Such information can be input to and stored in the operation part and sent to a driving part described later.

When the second coil part 320 is tilted counterclockwise to tilt the first coil part 310 counterclockwise, the driving part can tilt the first coil part 310. For example, the driving unit may include a plurality of actuators 315 and 316, which may be continuously arranged along the horizontal direction with reference to Fig. The first coil portion 310 can be tilted by different advancement and retraction of the plurality of actuators 315 and 316, respectively. For example, when the first coil part 310 is tilted counterclockwise, the actuator 315 on the left side of FIG. 5 may maintain the initial state or may be retracted downward, and the actuator 316 on the right side may move upward You can advance.

At this time, the first contact member 390 and the second contact member 391 are made of a stretchable material and can be prevented from being torn due to the rotation of the first coil part 310.

The first coil part 310 and the second coil part 320 can be kept parallel to each other and the distance between the first coil part 310 and the second coil part 320 can be maintained Can be kept the same.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood that various changes, modifications, or substitutions may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1000: Power supply unit 2000: Turret load
100: non-contact type power swivel 110: first coil part
120: second coil part 130: first case
140: second case 135, 145: through-hole
150: cover 170: bearing part

Claims (6)

A first coil part connected to the floating structure and rotatable together with the floating structure, and receiving a current from a power supply part disposed in the floating structure;
A first coil part connected to a turret relatively rotating with the floating structure and being spaced apart from the first coil part by a predetermined distance and having a current induced by a magnetic field formed in the first coil part, 2 coil part;
A tilting judging unit for detecting whether the first coil part and the second coil part are inclined or not and calculating an inclined angle; And
And a driving unit that tilts the first coil part or the second coil part based on a tilting sensed by the tilting determination part,
Wherein the inclination determining unit
A first elastic body having one end and the other end connected to the second coil portion and the floating structure respectively and being compressed when the second coil portion is inclined;
A second elastic body having one end and the other end connected to the second coil portion and the floating structure, respectively, and extending when the second coil portion is inclined; And
And a calculating unit calculating a length difference between the first elastic body and the second elastic body and determining whether the length difference exceeds a preset reference. The method according to claim 1,
Wherein the portion of the first coil portion where the coil is wound and the portion of the second coil portion where the coil is wound are maintained in a steady state in which they are arranged in parallel with each other in a steady state. delete delete In a non-contact power swivel,
A first coil part connected to a floating structure and rotatable together with the floating structure, and receiving a current from a power supply part disposed in the floating structure;
A first coil part connected to a turret relatively rotating with the floating structure and being spaced apart from the first coil part by a predetermined distance and having a current induced by a magnetic field formed in the first coil part, 2 coil part;
A tilting judging unit for detecting whether the first coil part and the second coil part are inclined or not and calculating an inclined angle; And
And a driving unit that tilts the first coil part or the second coil part based on a tilting sensed by the tilting determination part,
Wherein the inclination determining unit
Each of which is interposed between the first coil part and the second coil part and contacts both the first coil part and the second coil part and is arranged on the same vertical plane with respect to each other from the vertical center point of the non- A first contact member and a second contact member disposed at a position spaced apart by a predetermined distance from the first contact member;
A pair of pressure sensing bodies sensing a change in pressure acting on the first contact member and the second contact member, respectively; And
And an operating unit for detecting whether the second coil part tilts according to an increase or decrease in the pressure sensed by the pair of pressure sensing bodies and calculating an inclined angle of the non-contact type power swivel. The method according to claim 1,
Wherein the driving unit includes a plurality of actuators disposed under the first coil part and maintains a steady state tilting the first coil part by varying the degree of advancement and retraction of each of the plurality of actuators.

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