Seaweed cultivation system, and related apparatus, sheave, platform, use, and methods

Abstract

According to a first aspect of the disclosure, there is provided a rimless sheave for receiving and guiding a section of seaweed cultivation rope According to a second aspect of the disclosure, there is provided a submersible seaweed cultivation apparatus for cultivating seaweed on a rope loop. According to a third aspect of the disclosure, there is provided a rope driving module for driving a seaweed cultivation rope loop. According to a fourth aspect of the disclosure, there is provided a rope servicing platform for servicing a seaweed cultivation rope loop in a body of water. According to a fifth aspect of the disclosure, there is provided a seaweed cultivation system for cultivating and harvesting seaweed in a body of water. According to a sixth aspect of the disclosure, there is provided a use of a seaweed cultivation system according the fifth aspect of the disclosure. According to a seventh aspect of the disclosure, there is provided a use of a rimless sheave according to the first aspect of the disclosure. According to an eighth aspect of the disclosure, there is provided a use of a submersible seaweed cultivation apparatus according to the second aspect of the disclosure. According to a ninth aspect of the disclosure, there is provided a use of a rope servicing platform according to the fourth aspect of the disclosure. According to a tenth aspect of the disclosure, there is provided a method of installing a submersible seaweed cultivation apparatus. According to an eleventh aspect of the disclosure, there is provided a method of harvesting seaweed. According to a twelfth aspect of the disclosure, there is provided a rope seeding module for seeding a section of seaweed cultivation rope. According to a thirteenth aspect of the disclosure, there is provided a rope cleaning module for cleaning a section of seaweed cultivation rope.

Description

[0001] SEAWEED CULTIVATION SYSTEM, AND RELATED APPARATUS, SHEAVE, PLATFORM, USE, AND METHODS

[0002] TECHNICAL FIELD

[0003] The present disclosure relates to a seaweed cultivation system for submersion in a body of water.

[0004] BACKGROUND

[0005] Known methods of seaweed cultivation involves the use of ropes or nets suspended in a body of water, usually a sea or ocean. These ropes are known as cultivation ropes. In some applications, the cultivation ropes are initially seeded with seaweed spores which eventually grow into seedlings in a controlled hatchery environment before deployment. In others, a vector such as twine is bathed in spores and wrapped around the cultivation rope.

[0006] One known method involves suspending a single length of seeded cultivation rope across a moored frame. The moored frame comprises two or more longlines, which are long, parallel ropes, across which the cultivation rope is hung. The cultivation rope may extend through hooks arranged along the length of the longlines, or through hand-tied knots. Personnel in small vessels hang the cultivation rope manually. The depth at which the ropes are placed can be adjusted to optimize growth conditions based on the specific requirements of the seaweed species being cultivated. For example, some species such as winged kelp can thrive in relatively shallow waters only 5 metres deep, whereas other species such as sugar kelp may prefer deeper waters, for example over 15 or 20 metres deep.

[0007] The cultivation ropes are deployed at the start of the cultivation season, which is typically October to November in the northern hemisphere, and only brought up when the kelp is ready for harvesting, usually in May or June the following year. When being removed from the moored frame, the cultivation rope is detached therefrom hook by hook, whereafter the rope is winched onto a vessel and the seaweed scraped off using a knife. Once the seaweed has been removed, the cultivation rope is cleaned and stored until the cycle begins again in the autumn.

[0008] Other known methods involve the use of rope-laden frameworks which are lowered into the sea during the growing season, before being hoisted out and personnel use a trimming device to remove the cultivated seaweed therefrom. The purpose of the invention is to remedy or to reduce at least one of the disadvantages of known technology, or at least to provide a useful alternative to known technology.

[0009] The purpose is achieved by the features indicated in the description below and in the subsequent patent claims.

[0010] SUMMARY

[0011] According to a first aspect of the disclosure, there is provided a rimless sheave for receiving and guiding a section of seaweed cultivation rope, the sheave comprising: a hub; and three or more spokes extending radially from the hub, each spoke comprising an end portion comprising a groove for receiving the seaweed cultivation rope.

[0012] Advantageously, the rimless sheave may reduce the contact area with the section of cultivation rope, reducing damage to the seaweed cultivated thereon.

[0013] Optionally, the sheave is substantially rotationally symmetrical.

[0014] Advantageously, this allows the sheave impart consistent forces on the cultivation rope throughout its rotation.

[0015] Optionally, the hub comprises a central axis; each groove comprises a root arranged a first radial distance from the central axis of the hub; each spoke comprises a tip arranged a second radial distance from the central axis of the hub; and the first radial distance is less than 50%, 60%, 70% or 80% of the second radial distance.

[0016] Advantageously, having a relatively deep groove may reduce the chance of the cultivation rope slipping from the sheave.

[0017] Optionally, the end portion of each spoke comprises two diverging arms, the groove extending therebetween.

[0018] Advantageously, the two diverging arms may guide the cultivation rope to the root of the groove, reducing the chance of the cultivation rope slipping from the sheave.

[0019] According to a second aspect of the disclosure, there is provided a submersible seaweed cultivation apparatus for cultivating seaweed on a rope loop, the apparatus comprising: a sheave arrangement for receiving and guiding the rope loop, the sheave arrangement comprising: a first sheave; and a second sheave; and a frame for adjusting and maintaining the distance between the first and second sheaves, the frame comprising at least one mooring arrangement for securing the frame to a structure or natural feature, the frame being coupled with the sheave arrangement.

[0020] Advantageously, this may allow for the cultivation rope loop to remain submerged all year round, without requiring the entire rope to be taken up to harvest the seaweed grown thereon. This may allow for seaweed to be harvested multiple times each year.

[0021] Optionally the first and / or second sheaves are rimless sheaves in accordance with the first aspect of the disclosure.

[0022] Optionally, the first and second sheaves are arranged at least 100 metres apart.

[0023] Optionally, the sheave arrangement comprises: a first sheave assembly comprising the first sheave; and a second sheave assembly comprising the second sheave; the frame comprises: first and second frame side portions; and first and second frame end portions extending between the first and second side portions; the first frame end portion is coupled with the first sheave assembly; and the second frame end portion is coupled with the second sheave assembly.

[0024] Advantageously, the sheave assemblies may allow for multiple sheaves to be present at each end of the frame, which may reduce the load required to tension the rope loop due to the pulley effect.

[0025] Optionally, the first and / or second sheave assembly comprises a truss structure.

[0026] Advantageously, the truss structure may provide some structural strength to the sheave assemblies, allowing for higher tension of the rope loop than may otherwise be possible.

[0027] Optionally, the first and / or second sheave arrangement comprises at least two sheaves, including the first and / or second sheave.

[0028] Advantageously, this may reduce the load required to tension the rope loop due to the pulley effect. Optionally, the submersible seaweed cultivation apparatus further comprises two mooring arrangements.

[0029] Optionally, at least one mooring arrangement comprises an anchor.

[0030] Optionally, the submersible seaweed cultivation apparatus further comprises a rope loop arranged around at least two sheaves of the sheave arrangement.

[0031] According to a third aspect of the disclosure, there is provided a rope driving module for driving a section of seaweed cultivation rope, the driving module comprising a driving arrangement comprising: first and second continuous tracks defining a channel therebetween, wherein: the first continuous track is driven; and the second continuous track is passive; a first plurality of teeth evenly distributed around a perimeter of the first continuous track; and a second plurality of teeth evenly distributed around a perimeter of the second continuous track, wherein the first plurality of teeth engage with and drive the second plurality of teeth in the rope driving section.

[0032] Advantageously, this may allow for the rope loop to be driven, enabling different sections of the rope loop to be serviced while other sections remain in the water.

[0033] Optionally, the distribution of the first and second pluralities of teeth are substantially the same.

[0034] Optionally, the first and second continuous tracks are moveable between a first configuration and a second configuration, wherein in the first configuration, the first and second continuous tracks are a first distance apart; in the second configuration, the first and second continuous tracks are a second distance apart; and the first and second distances are different.

[0035] Optionally, this may allow for the rope loop to be arranged within the driving module without breaking of the loop.

[0036] Optionally, the second continuous track is moveable relative to the first continuous track.

[0037] Advantageously, this may allow for a simplified driving arrangement as the first continuous track may remain stationary.

[0038] Optionally, the second distance is adjustable. Advantageously, this may allow for the same driving arrangement to be used for driving ropes of different thicknesses.

[0039] Optionally, the channel comprises: a rope entry section for entry of the rope loop to the driving arrangement; a rope driving section for driving of the rope loop by the driving arrangement, wherein: the rope entry section is arranged adjacent the rope driving section; in the rope entry section, leading to the rope driving section, the first and second continuous tracks converge; and in the rope driving section, the first and second continuous tracks are parallel.

[0040] Advantageously, this may allow reduce damage to the seaweed on the section of rope loop entering the driving arrangement.

[0041] Optionally, the channel further comprises a rope exit section for exit of the rope loop from the driving arrangement, wherein the rope entry and exit sections are arranged either side of the rope driving section; and in the rope exit section, leading from the rope driving section, the first and second continuous tracks diverge.

[0042] Optionally, the first plurality of teeth engage with and drive the second plurality of teeth in the rope driving section.

[0043] Advantageously, this may allow for the second continuous track to be driven simply, reducing maintenance requirements.

[0044] Optionally, each tooth of the second plurality of teeth comprises: a base portion comprising an end surface arranged a first tooth distance from the perimeter of the second continuous track; and a protrusion extending from the base portion for engaging with the first plurality of teeth comprising an end surface arranged a second tooth distance from the perimeter of the second continuous track, wherein the second tooth distance is larger than the first tooth distance.

[0045] Advantageously, this may allow for the first and second plurality of teeth to interface a set distance apart, as the end surface of the base portion of the second plurality of teeth may prevent the first plurality of teeth from slipping towards the perimeter of the second continuous track.

[0046] Optionally, each tooth of the first plurality of teeth comprises an end surface arranged a third tooth distance from the perimeter of the first continuous track, wherein the third tooth distance is smaller than the second tooth distance of the second plurality of teeth. Advantageously, this may allow for an increased interface area between the first and second plurality of teeth.

[0047] Optionally, each tooth comprises first and second tooth profiles defining a gap therebetween for receiving a section of the rope loop.

[0048] Optionally, each tooth comprises a bar portion extending between the first and second tooth profiles for engaging a section of the rope loop in use.

[0049] Advantageously, this may allow for an increased interface area with the rope loop, reducing damage to the seaweed cultivated thereon.

[0050] Optionally, the driving arrangement is bidirectional.

[0051] Advantageously, this may allow for the rope loop to be driven in opposing directions.

[0052] Optionally, the rope driving module further comprises a plate on which the first and second continuous tracks are arranged, the plate comprising one or more rollers for supporting the rope loop.

[0053] Advantageously, this may reduce damage to seaweed on the rope loop.

[0054] According to a fourth aspect of the disclosure, there is provided a rope servicing platform for servicing a seaweed cultivation rope loop in a body of water, the platform comprising: a main body; and a rope driving module according to the third aspect of the disclosure.

[0055] Advantageously, this may allow for the rope loop to be serviced without requiring the rope loop to be pulled up.

[0056] Optionally, the rope servicing platform further comprises at least one of: a seaweed harvesting module for harvesting seaweed from the rope loop; a rope seeding module for seeding the rope loop with seaweed spores; and a rope cleaning module for cleaning the rope loop.

[0057] Optionally, the rope servicing platform further comprises a frame for coupling at least one module thereto.

[0058] Advantageously, this may allow for the modules to be fixed relative to one another. Optionally, the frame comprises at least one roller assembly for guiding the rope loop. Advantageously, this may reduce damage to the rope and / or the seaweed cultivated thereon during use.

[0059] Optionally, the rope servicing platform is a floating platform.

[0060] Advantageously, this may allow for the rope servicing platform to be moveable and able to service more than one rope loop.

[0061] Optionally, the rope servicing platform further comprises one or more modules according to the twelfth and / or thirteenth aspects of the disclosure.

[0062] According to a fifth aspect of the disclosure, there is provided a seaweed cultivation system for cultivating and harvesting seaweed in a body of water, the system comprising: a submersible seaweed cultivation apparatus according to the second aspect of the disclosure; and a rope servicing platform according to the fourth aspect of the disclosure.

[0063] Optionally, the rope loop extends through at least one module of the rope servicing platform.

[0064] Optionally, at least one module of the rope servicing platform is arranged above a surface of the body of water; and at least one sheave of the submersible seaweed cultivation apparatus is arranged below the surface of the body of water.

[0065] According to a sixth aspect of the disclosure, there is provided a use of a seaweed cultivation system according the fifth aspect of the disclosure.

[0066] According to a seventh aspect of the disclosure, there is provided a use of a rimless sheave according to the first aspect of the disclosure.

[0067] According to an eighth aspect of the disclosure, there is provided a use of a submersible seaweed cultivation apparatus according to the second aspect of the disclosure.

[0068] According to a ninth aspect of the disclosure, there is provided a use of a rope servicing platform according to the fourth aspect of the disclosure. According to a tenth aspect of the disclosure, there is provided a method of installing a submersible seaweed cultivation apparatus, the method comprising the steps of: providing a submersible seaweed cultivation apparatus according to the second aspect of the disclosure in a body of water; securing the frame using the at least one mooring arrangement; providing a length of cultivation rope; arranging the length of cultivation rope around at least two sheaves of the sheave arrangement of the submersible seaweed cultivation apparatus; tensioning the length of cultivation rope; and forming a rope loop by coupling ends of the cultivation rope together.

[0069] According to an eleventh aspect of the disclosure, there is provided a method of harvesting seaweed, the method comprising the steps of: providing a seaweed cultivation system according to the fifth aspect of the disclosure wherein the rope loop extends through at least one module of the rope servicing platform and wherein the rope servicing platform comprises a seaweed harvesting module for harvesting seaweed from the rope loop; operating the driving module and the harvesting module simultaneously.

[0070] According to a twelfth aspect of the disclosure, there is provided a rope seeding module for seeding a section of seaweed cultivation rope, the rope seeding module comprising: a main housing; and a rotor assembly, wherein the rotor assembly comprises a rotor, wherein the rotor is configured to receive the section of seaweed cultivation rope within a central aperture thereof; one or more arms coupled to the rotor, wherein the one or more arms are configured to receive one or more bobbins comprising a shaft around which seeded vector is wrapped.

[0071] According to a thirteenth aspect of the disclosure, there is provided a rope cleaning module for cleaning a section of seaweed cultivation rope, the rope cleaning module comprising one or more rope scraping devices and / or one or more high-pressure rope washing devices.

[0072] Optionally, the rope cleaning module comprises one or more rope scraping devices.

[0073] Optionally, the one or more rope scraping devices comprise one or more scraping bodies, wherein the position of the one or more scraping bodies is adjustable.

[0074] BRIEF DESCRIPTION OF DRAWINGS

[0075] The present disclosure will now be described by way of example, with reference to the following drawings, in which: Figure 1 is a perspective view of a seaweed cultivation system comprising a seaweed cultivation apparatus and a first embodiment of a rope servicing platform;

[0076] Figure 2 is a first detail perspective view of the seaweed cultivation system shown in Figure 1 ;

[0077] Figure 3 is a second detail perspective view of the seaweed cultivation system shown in Figure 1;

[0078] Figure 4 is a top plan view of the seaweed cultivation apparatus of the seaweed cultivation system shown in Figure 1 ;

[0079] Figure 5A is a first side cutaway detail view of the seaweed cultivation apparatus shown in Figure 4;

[0080] Figure 5B is a second side cutaway detail view of the seaweed cultivation apparatus shown in Figure 4;

[0081] Figure 6 is a perspective view of a rimless sheave of the seaweed cultivation apparatus shown in Figure 4;

[0082] Figure 7 is a top plan view of the rimless sheave shown in Figure 6;

[0083] Figure 8 is a side view of the rimless sheave shown in Figure 6;

[0084] Figure 9 is a perspective view of the first embodiment of the rope servicing platform shown in Figure 1 ;

[0085] Figure 10 is a top plan view of the first embodiment of the rope servicing platform shown in Figure 9;

[0086] Figure 11 is a side view of the first embodiment of the rope servicing platform shown in Figure 9;

[0087] Figure 12 is a perspective view of a first embodiment of a rope driving module of the first embodiment of the rope servicing platform shown in Figure 9;

[0088] Figure 13 is a top plan view of the first embodiment of the rope driving module shown in Figure 12 in a first configuration;

[0089] Figure 14 is a top plan view of the first embodiment of the rope driving module shown in Figure 12 in a second configuration;

[0090] Figure 15 is a side view of the first embodiment of the rope driving module shown in Figure 12;

[0091] Figure 16 is a first perspective view of a first embodiment of a seaweed harvesting module of the first embodiment of the rope servicing platform shown in Figure 9;

[0092] Figure 17 is a second perspective view of the first embodiment of the seaweed harvesting module shown in Figure 16;

[0093] Figure 18 is a top plan view of the first embodiment of the seaweed harvesting module shown in Figure 16; Figure 19 is a side view of the first embodiment of the seaweed harvesting module shown in Figure 16;

[0094] Figure 20 is a perspective view of a second embodiment of a rope servicing platform of a second embodiment of a seaweed cultivation system;

[0095] Figure 21 is a top plan view of the second embodiment of the rope servicing platform shown in Figure 20;

[0096] Figure 22 is a side plan view of the second embodiment of the rope servicing platform shown in Figure 20;

[0097] Figure 23 is a first perspective view of a second embodiment of a driving module of the second embodiment of the rope servicing platform shown in Figure 20;

[0098] Figure 24 is a second perspective view of the second embodiment of the driving module shown in Figure 23;

[0099] Figure 25 is a third perspective view of the second embodiment of the driving module shown in Figure 23;

[0100] Figure 26 is a perspective view of the second embodiment of the driving module shown in Figure 23 with a safety cover removed;

[0101] Figure 27 is a top plan view of the second embodiment of the driving module with the safety cover removed as shown in Figure 26;

[0102] Figure 28 is a bottom plan view of the second embodiment of the driving module with the safety cover removed as shown in Figure 26;

[0103] Figure 29 is a side cutaway view of the second embodiment of the driving module with the safety cover removed as shown in Figure 26;

[0104] Figure 30A is a perspective view of a second embodiment of a seaweed harvesting module of the second embodiment of the rope servicing platform shown in Figure 20;

[0105] Figure 30B is a side plan view of the second embodiment of the seaweed harvesting module shown in Figure 30A;

[0106] Figure 31 A is a top plan view of the second embodiment of the seaweed harvesting module shown in Figure 30A;

[0107] Figure 31 B is a bottom plan view of the second embodiment of the seaweed harvesting module shown in Figure 30A;

[0108] Figure 32A is a front plan view of the second embodiment of the seaweed harvesting module shown in Figure 30A;

[0109] Figure 32B is a rear plan view of the second embodiment of the seaweed harvesting module shown in Figure 30A;

[0110] Figure 33 is a perspective view of a rope seeding module of the second embodiment of the rope servicing platform shown in Figure 20;

[0111] Figure 34 is a side plan view of the rope seeding module shown in Figure 33; Figure 35A is a rear plan view of the rope seeding module shown in Figure 33;

[0112] Figure 35B is a bottom plan view of the rope seeding module shown in Figure 33;

[0113] Figure 36A is a front plan view of the rope seeding module shown in Figure 33 in a first configuration;

[0114] Figure 36B is a front plan view of the rope seeding module shown in Figure 33 in a second configuration;

[0115] Figure 37 is a perspective view of an arm and bobbin of the rope seeding module shown in Figure 33;

[0116] Figure 38A is a perspective cutaway view of a first end of the arm and bobbin shown in Figure 37;

[0117] Figure 38B is a perspective cutaway view of a second end of the arm and bobbin shown in Figure 38A.

[0118] Figure 39 is a perspective view of the rope seeding module shown in Figure 33 in use;

[0119] Figure 40 is a first perspective cutaway view of the rope seeding module shown in Figure 33 in use;

[0120] Figure 41 is a second perspective cutaway view of the rope seeding module shown in Figure 33 in use;

[0121] Figure 42 is a side plan view of the rope seeding module shown in Figure 33 in use;

[0122] Figure 43A is a perspective view of a first rope scraping device of a rope cleaning module of the second embodiment of the rope servicing platform shown in Figure 20;

[0123] Figure 43B is a side plan view of the first rope scraping device shown in Figure 43A;

[0124] Figure 43C is a top plan view of the first rope scraping device shown in Figure 43A;

[0125] Figure 43D is a front plan view of the first rope scraping device shown in Figure 43A;

[0126] Figure 44A is a perspective view of a second rope scraping device of the rope cleaning module of the second embodiment of the rope servicing platform shown in Figure 20;

[0127] Figure 44B is a side plan view of the second rope scraping device shown in Figure 44A;

[0128] Figure 44C is a top plan view of the second rope scraping device shown in Figure 44A;

[0129] Figure 44D is a front plan view of the second rope scraping device shown in Figure 44A;

[0130] Figure 45A is a perspective view of a high-pressure rope washing device of the rope cleaning module of the second embodiment of the rope servicing platform shown in Figure 20;

[0131] Figure 45B is a front plan view of the high-pressure rope washing device shown in Figure 45A; and

[0132] Figure 45C is a top plan view of the high-pressure rope washing device shown in Figure 45A. DETAILED DESCRIPTION

[0133] Overview

[0134] Figure 1 shows a system for cultivating and harvesting seaweed in a body of water generally at 100. The system 100 comprises a cultivation apparatus 200 and a rope servicing platform 300. The cultivation apparatus 200 is for cultivating seaweed on a rope loop, and the rope servicing platform 300 is for servicing the rope loop during a cultivation operation, for example harvesting seaweed from the rope loop, seeding the rope loop with seaweed spores, or cleaning the rope loop.

[0135] Cultivation apparatus 200 overview

[0136] The cultivation apparatus 200 can be seen in Figures 1 to 5B. The cultivation apparatus 200 comprises a sheave arrangement 220, a frame 240, and may optionally comprise a rope loop 280.

[0137] The sheave arrangement 220 is for receiving and guiding the rope loop 280, and comprises at least two sheaves 222. The sheave arrangement 220 may be considered as a pulley arrangement, and the force required to tension the rope loop 280 may be reduced by the two or more sheaves 222. The frame 240 is for adjusting and maintaining the distance between the at least two sheaves 222, allowing the rope loop 280 to be tensioned when arranged around the sheaves 222.

[0138] Sheave arrangement 220

[0139] As mentioned above, the sheave arrangement 220 comprises at least two sheaves 222. One embodiment of the sheave 222 can be seen in Figures 6 to 8.

[0140] The sheave 222 comprises a hub 224 comprising a central hub axis 225, and at least three spokes 226. Each of the spokes 226 extends radially from the hub 224, and comprises an end portion 227 comprising a groove 228. The sheave 222 may be considered as a rimless sheave due to the lack of circumferential rim extending around the spokes 226. The sheave 222 is rotatable around the central hub axis 225.

[0141] The groove 228 is for receiving the rope loop 280 and splits the end portion 227 of the spoke 226 in two, creating two diverging arms 230 of the end portion 227. In other words the groove 228 extends between the two diverging arms 230.

[0142] A root 229 of the groove 228 is arranged a first radial distance 232 from the central axis 225 of the hub 224. Each of the diverging arms 230 comprise a tip 231 arranged a second radial distance 233 from the central axis 225. The first radial distance 232 is at least 20, 30, 40, or 50% of the second radial distance 233.

[0143] In the present embodiment, the sheave 222 comprises 6 spokes 226, but in other embodiments may comprise fewer or more spokes 226, for example 3, 4, 5, 6, 7, 8, 9, or 10 or more spokes 226. The sheave 222 may be substantially rotationally symmetrical. When a part is described as "substantially rotationally symmetrical," this means the part may be largely but not perfectly rotationally symmetrical. The term "substantially" indicates that while the part may have minor differences or deviations from absolute rotational symmetry, these differences or deviations are not significant enough to affect the overall appearance or function of the part in its intended application.

[0144] Returning to Figures 1 and 4 to 5B, the sheave arrangement 220 comprises a first sheave assembly 240 and a second sheave assembly 250. Each sheave assembly 240, 250 comprises at least one of the sheaves 222, and in the present example further comprises a truss structure 242, 252 for mounting at least one of the sheaves 222 thereon. The first and second sheave assemblies 240, 250, and by implication two or more of the sheaves 222, may be arranged a variety of distances apart, for example less or more than 25 metres, less or more than 50 metres, less or more than 100 metres, or less or more than 150 or 200 metres.

[0145] As can be seen in Figure 4, the first sheave assembly 240 comprises four sheaves 222, and the second sheave assembly 250 comprises three sheaves 222, making seven sheaves 222 in total. In some embodiments, each sheave assembly 240, 250 may comprise fewer sheaves 222, for example 1 or 2, or more sheaves 222, for example 5, 6, 7, 8, or more. The sheaves 222 are arranged such that each sheave 222 only guides one section of the rope loop 280. In Figure 4, it can be seen that the some of the sheaves 222 of the first sheave assembly 240 are offset from one another, allowing a section of the rope loop 280 to pass around the back of the sheaves 222, reducing the chances of seaweed growing on different sections of the rope loop 280 tangling with one another in use.

[0146] The sheaves 222 allow the rope loop 280 to be continuously pulled through the sheave arrangement 220 without requiring the rope loop 280 to be removed therefrom.

[0147] The sheave arrangement 220 may further comprise at least one buoyancy element (not shown) for maintaining the depth of the cultivation apparatus 200 in use.

[0148] Frame 260 The frame 260 comprises frame side portions 262, frame end portions 264, and at least one mooring arrangement 270 for securing the frame 260 to a structure or natural feature, for example a permanent underwater foundation, the seabed or land. The frame 260 may be known as a tensionable frame 260, in that it has the ability to be tensioned. The frame end portions 264 may be known as cross-lines or cross-chains, as they extend between the frame side portions 262. The mooring arrangement 270 allows the frame 260 to be tensioned, with the suitable structure or natural feature the frame 260 is moored to providing the reaction forces necessary for tensioning.

[0149] Figures 5A and 5B are side cutaway views of the cultivation apparatus 200 omitting the frame side portions 262.

[0150] In the present example, the frame 260 comprises two mooring arrangements 270: a first mooring arrangement 271 and a second mooring arrangement 274.

[0151] The first mooring arrangement 271 comprises two mooring plates 272, and a mooring line 273, which may be a chain, coupled with each of the mooring plates 272. In the present example, one of the frame side portions 262 and one of the frame end portions 264 are coupled with each of the mooring plates 272. Each mooring line 273 is secured to land (not shown).

[0152] The second mooring arrangement 274 also comprises two mooring plates 275 and two mooring lines 276 coupled with each of the mooring plates 275, meaning there are four mooring lines 276 in total. In the present example, one of the frame side portions 262 and one of the frame end portions 264 are coupled with each of the mooring plates 275. The mooring lines 276 may also be chains, as they are in the present example. Each mooring line 276 is coupled with at least one anchor 277 embedded in a seabed.

[0153] The frame 260 may also further comprise at least one buoyancy element 278 for maintaining the depth of the cultivation apparatus 200 in use.

[0154] Rope loop 280

[0155] The rope loop 280 may be, for example between 30 and 40 millimetres in diameter, and is typically seeded with seaweed spores before initial deployment. The rope loop 280 may be pre-measured and pre-stretched before initial deployment, to avoid slackening once it is placed under tension. First embodiment of rope servicing platform 300

[0156] The rope servicing platform 300 is for servicing the rope loop 280, and can be seen in Figures 9 to 11 . The platform 300 comprises a main body 320 and may comprise various rope servicing modules, for example a driving module 330. The main body 320 is for supporting the driving module 330 on an upper surface 332 thereof, and may be floating or fixed. For example, the main body 320 may be part of a service vessel (not shown), for example a deck.

[0157] The rope servicing platform 300 may also be used for servicing a rope line (not shown), for example in a long line configuration. As such, any reference to the rope loop 280 may instead be considered as referring to a rope line.

[0158] Driving module 330

[0159] The driving module 330 is for driving the rope loop 280 and can be seen in Figures 12 to 15. As the rope loop 280 is arranged around the sheaves 222 in use, driving the rope loop 280 may be performed continuously, without end. The typical direction of movement of the rope loop 280 can be seen in Figure 2, though in many embodiments the rope loop 280 may be driven bidirectionally, i.e. in a first direction and in a second direction. The driving module 330 comprises a driving arrangement 332 for driving the rope loop 280 bidirectionally and a plate 390 for supporting the driving arrangement 332 thereon.

[0160] The driving arrangement 330 comprises a first continuous track 340 and a second continuous track 360. Each of the first and second continuous tracks 340, 360 may be considered as forms of caterpillar track. The first continuous track 340 is driven, and the second continuous track 360 is passive, engaging with and being driven by the first continuous track 340. A channel 375 is defined between the first and second continuous tracks 340, 360.

[0161] The first continuous track 340 comprises a chain 342 arranged at a perimeter thereof, upon which a first plurality of teeth 344 are mounted. In other embodiments, the chain 342 may be a band or other form of loop. The first plurality of teeth 344 are evenly distributed around the chain 342, each tooth being a first distribution distance 345 apart. Each tooth of the first plurality of teeth 344 may be considered as being substantially identical. This means that the teeth are very similar but not necessarily exactly the same, potentially having minor variations or differences between them that do not significantly impact their geometry or interchangeability. Each tooth extends from the chain 342 a first tooth extension distance 346.

[0162] The second continuous track 360 comprises a chain 362 arranged at a perimeter thereof upon which a second plurality of teeth 364 are mounted. The second plurality of teeth 364 are evenly distributed around the chain 364, each tooth being a first distribution distance 345 apart. Each tooth of the second plurality of teeth 364 may be considered as being substantially identical, and comprises a base portion 366 and a protrusion 368. The base portion 366 comprises an end surface arranged a second tooth extension distance 367 from the chain 342, and the protrusion 368 comprises an end surface extending a third tooth extension distance 369 from the chain 342. The third tooth extension distance 369 is larger than the first tooth extension distance 346 of the first plurality of teeth 344.

[0163] The distribution distances 345, 365 are substantially the same such that the distribution of the first and second pluralities of teeth 344, 364 are substantially the same.

[0164] In a first configuration shown in Figure 13, the first and second continuous tracks 340, 360 are a first distance apart such that the first and second pluralities of teeth 344, 364 do not interface with one another. This configuration may also be known as a rope loading configuration, as the rope loop 280 may be placed in the channel 374 in such a configuration.

[0165] In a second configuration shown in Figure 14, the first and second continuous tracks 340, 360 are a second distance apart such that the first and second pluralities of teeth 344, 364 may interface with one another. This configuration may also be known as a rope driving configuration, as the rope loop 280 is gripped between the first and second pluralities of teeth 344, 364 and may be driven. In the present example, the second continuous track 360 is moveable relative to the first continuous track 340, but in other configurations the first and / or second continuous tracks 340, 360 may be moveable relative to one another. The first and / or second continuous track 340, 360 may be configured such that the distance therebetween in the first and / or second configuration is adjustable. To this end, a clamp arrangement may be used, for example, to fix the first and / or second continuous track 340, 360 in position.

[0166] Each of the first and / or second continuous tracks 340, 360 comprise one or more tapered portions, such that the channel 375 defined therebetween varies in cross-dimension along its length. The channel 375 comprises a rope entry section 376, a rope driving section 377, and a rope exit section 378. The rope driving section 377 is arranged between the rope entry and exit sections 376, 378.

[0167] In the rope entry section 376, the first and / or second continuous tracks 340, 360 are shaped such that they converge. In the rope driving section 377, the first and / or second continuous tracks 340, 360 are shaped such that they are parallel. The first plurality of teeth 344 engage with and rive the second plurality of teeth 364 in the rope driving section 377. In the rope exit section 378, the first and / or second continuous tracks 340, 360 are shaped such that they diverge.

[0168] As can be seen in Figures 12 and 15, each tooth of the pluralities of teeth 344, 364 comprise a first tooth profile 347 and a second tooth profile 348 defining a gap 349 therebetween for receiving a section of the rope loop 280. The first and second tooth profiles 347, 348 are substantially identical.

[0169] A bar portion 350 extends between the first and second tooth profiles 347, 348 and is for engaging a section of the rope loop 280. The rope loop 280 is squeezed between the bar portions 350 of the first and second pluralities of teeth 344, 364 in the rope driving section 377 of the channel 375 when the driving arrangement 332 is in the second configuration.

[0170] The teeth 344, 364 may further comprise replaceable portions (not shown), for example replaceable tips, which may be replaced more frequently than other portions of the teeth due to increased wear. The replaceable tips may be made of a metal alloy such as alu-brass.

[0171] Further, in other embodiments, such as the driving module 530 described below, the teeth 344, 364 may be on opposite tracks 340, 360, for example where the teeth 344 described above are comprised by the second continuous track 360 instead and the teeth 364 described above are comprised by the first continuous track 340 instead.

[0172] The driving arrangement 332 may further comprise a hydraulic motor 380 for driving the first continuous track 340, where, for example, the hydraulic motor 380 comprises a gearbox, for example a planetary gearbox. In other embodiments, the hydraulic motor 380 may be a different type of actuator, for example an electric motor.

[0173] The plate 390 comprises one or more rollers 392 for supporting the rope loop 280 in use.

[0174] Other modules 410, and frame 440

[0175] The platform 300 may comprise other modules instead of or in combination with the driving module 330. For example, the platform 300 further comprises a seaweed harvesting module 410, as can be seen in Figures 16 to 19. The seaweed harvesting module 410 is for harvesting seaweed from the rope loop 280.

[0176] The seaweed harvesting module 410 comprises a main body 412 and one or more blades 417 for cutting seaweed from the rope loop 280. The main body 412 comprises a channel 413 for receiving a section of the rope loop 280. The channel 413 comprises an entry 414, a middle 415, and an exit 416. Similar to the channel 375 of the driving module 330, the entry 414 is converging, the middle 415 is parallel, and the exit 416 is diverging. In the present example, the harvesting module 410 comprises two blades 417 arranged such that their cutting edges overlap directly below the channel. The two blades 417 are offset from one another. The module 410 comprises a motor 418 for driving each blade 418.

[0177] In other embodiments, the platform 300 may further comprise a rope seeding module (not shown) for seeding the rope loop 280 with seaweed spores, and a rope cleaning module (not shown) for cleaning the rope loop. Both the rope seeding module and the rope cleaning module may utilise existing technology and methods, but simply be arranged on the platform 300.

[0178] The modules described above are typically arranged above a surface of the body of water in which the cultivation apparatus 200 is deployed. The rope loop 280 is provided through at least one of these modules when present.

[0179] The driving module 330 and one or more of the other modules, for example the seaweed harvesting module 410, may be operated simultaneously.

[0180] In the present example, the rope servicing platform 300 comprises a frame 450 for supporting one or more of the modules described above thereon and coupling one or more of the modules thereto. The frame 450 comprises an extended section 452 comprising one or more rails upon which the modules are arranged, and one or more rollers 454 arranged at one end thereof for supporting the rope loop 280. A section of the rope loop 280 extending between the first and second sheave assemblies 240, 250 may be winched up onto the frame 450 such that it is supported by the rollers 454. This can be seen in Figures 1 to 3, for example.

[0181] Driving the rope loop 280 using the driving module 330 drives the rope loop 280 through the seaweed harvesting module 410, allowing the seaweed present thereon to be cut off by the blades 417, and the other modules if present. In the present example, after the seaweed harvesting module 410, the rope loop 280 then descends back into the body of water, and around the sheaves 222.

[0182] Method relating to tensioning the rope loop 280

[0183] The rope loop 280 may be tensioned as follows. Firstly, a cultivation apparatus 200 as above is provided / deployed in a body of water, and the frame 260 is moored using the first and second mooring arrangements 271 , 272. The frame 260 may then be tensioned, for example by removing sections of the frame side portions 262 and / or frame end portions 264, and / or using the mooring arrangements 271 , 274, for example removing sections of the mooring lines 273, 276.

[0184] The rope loop 280 is then provided and arranged around the sheaves 222 of the sheave arrangement 220. This can be done in several ways. For example, the rope loop 280 may initially be a length of rope, threaded through the sheaves 222 using a guide rope (not shown). This step may be performed by a diver, for example. More specifically, the rope loop 280 may initially be a length of cultivation rope comprising first and second loose ends. The guide rope may then be threaded through the sheaves 222. One end of the guide rope is coupled with one of the loose ends of the length of cultivation rope, and the length of cultivation rope is pulled through the sheaves 222. The length of cultivation rope may then be decoupled from the guide rope, and placed under tension before the first and second loose ends are coupled, for example spliced together, forming the rope loop 280. In another example, the rope loop 280 may be tensioned by using the mooring lines 273, 276.

[0185] Once installed, the rope loop 280 may be further tensioned by a combination of cutting, tensioning, and splicing.

[0186] Second embodiment of rope servicing platform 500

[0187] Figures 20 to 45C show a second embodiment of the rope servicing platform 500 and its associated features and modules. The rope servicing platform 500 and its associated features (e.g. driving module 530 and seaweed harvesting module 610, described below) are identical to the rope servicing platform 300 described above, aside from the following differences which will now be described in detail. Many features of the rope servicing platform 300 are present in the rope servicing platform 500, though with reference numerals 200 larger (i.e. 300 to 500, as with the platform itself). 500

[0188] The rope servicing platform 500 comprises a driving module 530, a seaweed harvesting module 610, a rope seeding module 650, and a rope cleaning module 750, as can be seen in Figures 20 to 22. In the present example, as can be seen in Figure 21 where the rope direction runs left to right, the modules are arranged in the following order: seaweed harvesting module 610, rope cleaning module 750, driving module 530, and rope seeding module 650. All modules are optional, and, for example, a different embodiment of the rope servicing platform 500 may comprise fewer modules, more modules, and / or one or more of the same modules arranged in a different order. Driving module 530

[0189] The driving module 530 can be seen in Figures 23 to 27 and comprises a plate 590 and roller 592, similar to the plate 390 and one of the rollers 392 of the driving module 330.

[0190] The plate 590 comprises one or more drainage holes for draining excess water therethrough.

[0191] The driving arrangement 532 further comprises a first continuous track 540 and a second continuous track 560. The second continuous track 560 comprises a piston arrangement 570 and / or a pivot arrangement 572.

[0192] The piston arrangement 570 is for moving the second continuous track 560 relative to the first continuous track 540. In the present example, as seen in Figure 28, the piston arrangement 570 is arranged on an underside of the plate 590. The piston arrangement 570 comprises a piston 571 for providing this relative movement, and in the present example the piston 571 is hydraulically actuated, though in other examples the piston 571 may be actuated differently, for example electrically powered.

[0193] Further, the pivot arrangement 572 is for enabling pivoting of the second continuous track 560 relative to the first continuous track 540. This may be useful, for example, when the rope loop 280 has knots or clumps of material attached thereto, as the movement of the second continuous track 560 relative to the first continuous track 540 enables the rope loop 280 to be gripped under such circumstances. The pivot arrangement 572 comprises a pivot axis 573, and may, for example, further comprise a pivot stem 574 about which the second continuous track 560 is mounted, and a biasing mechanism (not shown), for example a spring mechanism which is configured to bias the second continuous track 560 back to a central position, for example where the first and second tracks 540, 560 are substantially parallel with one another in at least a portion of the channel 575. The pivot stem 574 extends through the plate 590. In the present example, the plate 590 comprises a drive adjustment aperture 591 , which can be seen in Figure 29, through which the pivot stem 574 extends. The drive adjustment aperture 591 is sized such that the pivot stem 574 may be moved therein, facilitating movement of the second continuous track 560.

[0194] In addition to these features, the driving module 530 may further comprise a sheave arrangement 594. The sheave arrangement 594 is for supporting the rope loop 280 in use and also may have the function of driving the rope loop 280, at least in part. The sheave arrangement 594 comprises a sheave 595, in which the rope loop 280 is arranged. The sheave arrangement 594 may further comprise, as it does in the shown embodiment, a rope retention device 596, for retaining the rope loop 280 within the sheave 595 at a first location, and a wedge 599 for parting the rope loop 280 from the sheave 595 at a second location. The rope retention device 596 may comprise an arm 597 and a weight 598 for applying pressure to a top surface of the rope loop 280, retaining it within the sheave 595. In other embodiments not shown, the arm 597 and the weight 598 may be formed integrally or take on a different form entirely. The wedge 599, as best seen in Figure 26, is for ensuring the rope loop 280 and / or the seaweed cultivated thereon does not become tangled within the sheave 595.

[0195] The sheave arrangement 594 is driven, for example further comprising a motor, for example a direct-drive hydraulic motor, and / or a clutch system comprising adjustable relief and / or flow control valves. The sheave arrangement 594 maintains tension in section of the rope loop 280 near the driving module 530.

[0196] As can be seen in Figures 23 to 25, the driving module 530 further comprises an optional safety cover 600, for preventing users from the driving arrangement 532, which is similar to the driving arrangement 332 of the driving module 330. The safety cover 600 comprises a main shell 601 coupled to the plate 590. The main shell 601 comprises a door arrangement 602 for enabling access to the driving arrangement 332. In the present embodiment, the safety cover 600 also optionally comprises fluid ports 603 for fluidly connecting to a water supply to supply water to cool and lubricate the driving arrangement 332. The safety cover 600 optionally comprises a locking mechanism (not shown) comprising a safety switch, such that the driving arrangement 532 is deactivated when the safety cover 600 is opened. The safety switch may be hydraulically actuated and / or spring-loaded, and may, for example, interrupt the flow loop of the pressurised hydraulic fluid powering the hydraulic motor 580 such that the hydraulic motor 580 is deactivated.

[0197] As can be seen in Figure 25, the driving module 530 also comprises an optional drip tray 603 arranged on an underside thereof. Water supplied to cool the driving arrangement 332 may be collected within the drip tray 603, for example, and be discharged over a hydraulic motor 580, of the driving module 530, which similar to the hydraulic motor 380 of the driving module 330, for the purpose of cooling.

[0198] The driving module 530 further comprises an optional anti-snag plate 605 for preventing the rope loop 280 from snagging on the driving arrangement 532 and for parting the rope loop 280 therefrom. The anti-snag plate 605 is arranged in the rope exit section 578 of the channel 575 of the driving module 530. The anti-snag plate 605 is configured to minimise the clearance between the driving arrangement 532 and the plate 590 at the rope exit section 578, reducing the possibility of the rope loop 280 wrapping itself around the driving arrangement 532, for example when tension is lost or reduced during operation.

[0199] In the present example, the anti-snag plate comprises an optional ramp portion arranged in the rope exit section 578 of the channel 575, which provides a bottom surface for the rope as it leaves the driving arrangement 532. The anti-snag plate 605 further comprises an optional swept portion with a bottom surface of a substantially consistent height, over which the teeth of the driving arrangement 532 travel with minimal clearance, to prevent the entrapment of the rope loop 280 therebetween. The swept portion further comprises an optional lip surface which has a geometry corresponding to that of the teeth proximate the rope exit section 578, allowing the tips of the teeth to travel therealong with minimal clearance, again to prevent entrapment of the rope loop 280 therebetween.

[0200] Seaweed harvesting module 610

[0201] As can be seen in Figures 30A to 32B, the seaweed harvesting module 610 comprises an optional rope retention device 620 not present in the seaweed harvesting module 410. The rope retention device 620 extends across a channel 613, similar to the channel 413, and is removable. The rope retention device 620 is releasably fastened to a top surface of a main body 612 of the seaweed harvesting module 610 via one or more fasteners 623. In the present embodiment, the rope retention device 620 comprises one or more apertures 622 which may be keyhole apertures, for enabling fast mounting and removal of the rope retention device 620 without fully removing the fasteners 623. This embodiment of the seaweed harvesting module 610 does not show a safety cover, which may or may not be present in use.

[0202] The seaweed harvesting module 610 further comprises optional blades 617 and an optional rope support 630 for preventing the rope loop 280 from contacting the blades 617, for example when tension is lost in the rope loop 280 during stoppage. The rope support 630 can be seen in Figure 32B, for example.

[0203] The seaweed harvesting module 610 further comprises an optional adjustable cutter mount 640, for adjustably mounting one or more motors 618 and / or one or more blades 617 thereto. The adjustable cutter mount 640 comprises optional location adjustment means 642 for adjusting the position of the one or more motors 618, and in the present example include one or more slots 644, one or more fasteners 646, and / or one or more clamps 648. In other examples, the location adjustment means 642 takes a different form, for example a quickrelease coupling. The location adjustment means 642 of the present example enables vertical and horizontal movement of the motors 618 and thus cutting blades 617 which are coupled thereto. A user seeking to adjust the position of the blades 617 in a vertical direction would loosen the fasteners 646, slide the motor 618 up and / or down such that the fasteners 646 slide within the slot 644, and then tighten the fasteners 646 when the blades 617 are in the desired position. Movement of the blades 617 in the horizontal direction would involve loosening the clamp 648 before sliding the cutter mount 640 to the desired position and tightening the clamp 648 again. In other examples (not shown), the location adjustment means also enables forward-backward adjustment of the blades 617, and thus movement of the blades 617 in all three dimensions.

[0204] The rope support 630 extends between and is coupled to the two cutter mounts 640 of the present example. The rope support 630 optionally comprises one or more location adjustment means 632, which in the present example is a slot. The two slots 632 enable the vertical position of the rope support 630 to be adjusted, for example by loosening the fasteners 646 of the cutter mount 640, moving the rope support 630 to the desired position, and tightening the fasteners 646 again.

[0205] Rope seeding module 650

[0206] The rope seeding module 650 is for seeding the rope loop 280 with seaweed spores. The rope seeding module 650 is configured to wrap a seeded vector, for example twine, around the rope loop 280, in order to seed the rope loop 280.

[0207] The rope seeding module 650 comprises a main housing 652 and a rotor assembly 660. The rotor assembly 660 is arranged within the main housing 652. Further, in the present example, the rope seeding module 650 comprises a mounting frame 730 for mounting the rope seeding module 650, more specifically the housing 652, to the rope servicing platform 500.

[0208] The rotor assembly 660 is configured to rotate and deposit a seeded vector around the rope loop 280. The rotor assembly 660 comprises a rotor 662, for rotating within the housing 652, and a bearing assembly 670, for enabling rotation of the rotor 662. The rotor assembly 660 further comprises one or more arms 680 for holding the seeded vector. The one or more arms 680 are coupled with the rotor 662. The rotor assembly 660 further comprises a motor 710 for driving the rotor 662, and a transmission assembly 712 for transferring power from the motor 710 to the rotor 662. The rotor assembly 660 further comprises one or more bobbins 720, each comprising a shaft 722 around which seeded vector 723, in the present example twine, is wrapped. The one or more bobbins 720 are received on the arms 680.

[0209] In the present example, there are six arms 680. In some embodiments, there may be fewer arms, for example one, two, three, four, or five or more arms 680, and in other embodiments there may be more, for example seven, eight, ten, or more. Including a larger number of arms 680 may be beneficial as the rotor 662 may be able to rotate slower without sacrificing seed density, reducing wear of parts, and also the time interval between replacing the bobbins 720 may be increased.

[0210] The housing 652 comprises a central aperture 654 for receiving the rotor assembly 660 and the rope loop 280. The housing 652 further comprises a slit 656 for receiving the rope loop 280 into the central aperture 654.

[0211] The rotor 662 comprises a central axis 664 about which it rotates. The rotor comprises a base portion 666 and a rim portion 668. The base portion 666 is arranged at least partially within the housing 652, and in the present example the rim portion 668 is also arranged at least partially within the housing 652. The rim portion 668 is in direct contact with the bearing assembly 670 within the housing 652, and is supported thereby. The rotor 662 comprises a central aperture 666 extending through the base portion 666 and the rim portion 668. The central aperture 664 of the rotor 662 is for receiving the rope loop 280 therewithin. The base portion 666 and the rim portion 668 each comprise a slit 669 for receiving the rope loop 280 into the central aperture

[0212] 667.

[0213] The one or more arms 680 are coupled with the rotor 662, more specifically the rim portion

[0214] 668, and rotate with the rotor 662 as it rotates. The arms 680 may be reversibly coupled with the rotor 662 such that the arms 680 may be replaced. For example, quick-release connectors may be used. One or more of the arms 680 are pivotably and adjustably coupled with the rotor 662 via one or more pivotable couplings 682. The one or more arms 680 are arranged in a rotationally symmetrical arrangement about the central axis 664 of the rotor 662. The arms 680 comprise a rod 684 on which one or more of the bobbins 720 are arranged. Each rod 684 comprises a central axis 685. In the present example, the arms 680 extend non- perpendicularly from the rotor 662 and / or non-parallel to one another. In other examples, the arms 680 may extend parallel to one another, and, for example, two or more of the arms 680 may be substantially parallel to one another and / or two or the arms 680 may be substantially non-parallel to one another. The arms 680 further comprise a bobbin retainment mechanism 690, for retaining one or more of the bobbins 720 on one or more of the arms 680, more specifically the rods 684. This feature can be seen in Figure 38A, for example.

[0215] The bobbin retainment mechanism 690 is arranged over the bobbin 720 when the bobbin 720 is arranged on the rod 684. The bobbin retainment mechanism 690 comprises an end cap 691 . The end cap 691 engages with an end of the bobbin 720 such that there is no relative movement therebetween.

[0216] The bobbin retainment mechanism 690 further comprises a first retainment portion 692 and a second retainment portion 702 retained in position by a removable stop pin 709. The first retainment portion 692 comprises an inner volume 695 in which a compression mechanism

[0217] 696, in the present case a compression spring, is arranged. The first retainment portion further comprises a side surface 697 through which an aperture 697 extends perpendicular to the central axis 685 of the relevant rod 684. The first retainment portion 692 further comprises an end cap engagement surface 699 for engaging the end cap 691 and preventing relative movement thereof via friction. The first retainment portion 692 also comprises a rod coupling mechanism 700 for coupling the first retainment portion 692 to the rod 684 and preventing relative rotation thereof.

[0218] The second retainment portion 702 is arranged within the inner volume 695 of the first retainment portion 692. The second retainment portion 702 comprises an inner volume 705 and also comprises a side surface 707 through which an aperture 707 extends perpendicular to the central axis 685 of the relevant rod 684. The second retainment portion 702 is arranged over the rod 684, and inside the inner volume 695 of the first retainment portion 692. When the second retainment portion 702 is pushed such that the aperture 697 of the first retainment portion 692 and the aperture 707 of the second retainment portion 702 are aligned, the compression mechanism 696 is under compression. Placing the stop pin 709 in the apertures

[0219] 697, 707 ensures the bobbin retainment mechanism 690 is retained in this position. When the compression mechanism 696 is under compression, the first retainment portion 692 is biased towards the end cap 691 , engaging the end cap 691 and preventing its relative movement / rotation via the end cap engagement surface 699.

[0220] The motor 710 may be hydraulically and / or mechanically actuated. For example, the motor 710 may be synchronised and / or hydraulically connected with the motor 580 of the driving module 530, which that when the motor 580 speeds up, the motor 710 also speeds up, and when the motor 580 is not operating, neither is the motor 710. The mounting frame 730 comprises a vertical adjustment means 732 for adjusting then height of the rope seeding module 650.

[0221] Rope cleaning module 750

[0222] The rope cleaning module 750 is for cleaning the rope loop 280. The rope cleaning module 750 may comprise a rope scraping device 760, 800 and / or a high-pressure rope washing device 850, all of which can be seen in Figures 43A to 45C. In the present example, the rope cleaning module 750 comprises a first rope scraping device 760, a second rope scraping device 800, and a high-pressure rope washing device 850. In use, each of the devices 760, 800, 850 may have a collection bin arranged thereunder for the purpose of collecting seaweed and / or detritus gleaned therefrom. Further, the various devices 760, 800, 850 may be oriented differently, for example upside-down compared with how they have been described or shown in the Figures, or at 90 degrees.

[0223] In the present example, as can be seen in Figure 21 where the rope direction runs left to right, the devices 760, 800, 850 are arranged in the following order: second rope scraping device 800, first rope scraping device 760, and high-pressure rope washing device 850. All devices 760, 800, 850 are optional, and, for example, a different embodiment of the rope servicing platform 500 may comprise one or more rope cleaning modules 750 with one or more of the devices 760, 800, 850 arranged before or after one or more of the modules 530, 610, 650.

[0224] The first rope scraping device 760 comprises a main body 770, a scraper assembly 780, and a frame 790, and may be known as a vertical scraping device. The scraper assembly 780 is coupled with the main body 770. The main body 770 is reversibly coupled with the frame 790, and may be removed to load the rope loop 280 within the scraper assembly 780. The frame 790 is for coupling the first rope scraping device 760 to the rope servicing platform 500.

[0225] The main body 770 is in the form of a plate, and comprises a horizontal portion 771 , one or more scraper mounting slots 772, a vertical portion 773, and one or more frame slots 774. The scraper mounting slots 772 are arranged through on the horizontal portion 771 , and the frame slots 774 are arranged through the vertical portion 773. Arranging the frame slots 774 through the vertical portion 773 enables the main body 770 to be removed vertically. The scraper mounting slots 772 are for mounting the scraper assembly 780 therein, and the frame mounting slots 774 are for mounting the frame 790 therein. The scraper assembly 780 comprises one or more scraping bodies 782 and may comprise one or more fasteners 788 for coupling the scraping bodies 782 with the main body 770. In use, the rope loop 280 is arranged between the scraping bodies 782, in contact therewith, and is scraped by each as it moves through the scraper assembly 780. Each scraping body 782 comprises a scraping surface 784 and is adjustably coupled to the main body 770. In the present example, the position of each scraping body 782 is adjustable, such that the amount of scraping performed by the scraping bodies 782 can be adjusted. This is enabled by the fasteners 788 extending through the scraper mounting slot 772 in the main body 770. When the fasteners 788 are loosened, the scraping body 782 may be moved along the scraper mounting slot 772 before the fastener 788 is tightened again. Further, the scraping bodies 782 may be rotatably adjustable, such that the angle of the scraping surfaces 784 encountered by the rope loop 280 may be adjustable.

[0226] Apertures are optionally provided along one or more of the scraper mounting slots 772 for optionally securing the scraping body 782 to the main body 770 via the fasteners 788. For example, a nut may extend through the apertures arranged proximate the relevant scraping body 782 and be bolted at the other side, in addition to the central fastener 788 shown in Figure 43C.

[0227] The second rope scraping device 800 may be considered as a horizontal rope scraping device. The second rope scraping device 800 comprises a main body 810, a scraper assembly 820, and a frame 830. The second rope scraping device 800 further comprises a removable rope retention device 840 for entry of the rope loop 280 into the second rope scraping device 800. The rope retention device 840 comprises an opening 844, as can be seen in Figure 44A, which allows the rope retention device 840 to be pivoted such that the rope loop 280 may be entered into the second rope scraping device 800. The scraper assembly 820 is coupled with the main body 810. The main body 810 is coupled with the frame 830. The frame 830 is for coupling the second rope scraping device 800 to the rope servicing platform 500.

[0228] The main body 810 comprises one or more vertical portions 811 comprising a scraper mounting slot 812. The scraper assembly 820 comprises one or more scraping bodies 822 extending between the two vertical portions 811 of the present embodiment. Optionally, the scraping bodies 822 are removeable and / or adjustable. The scraping bodies 822 each comprise a scraping surface 824 and one or more fasteners 828 for coupling the scraping body 822 with the vertical portion 811 of the main body 810. The fasteners 828 extend through the scraper mounting slots 812. When the scraping bodies 822 are removeable, the relevant fasteners 828 may be removed, for example, decoupling the scraping bodies 822 from the vertical portion(s) 811 of the main body 810, allowing the scraping bodies 822 to be removed. This may be useful, for example, when the rope loop 280 is being positioned within the second rope scraping device 800. When the position of each scraping body 822 is adjustable, the relevant fastener 828 is loosened, for example, and the scraping body 822 is moved to the desired position before the fastener 828 is tightened again. Further, the scraping bodies 822 may be rotatably adjustable, such that the angle of the scraping surfaces 824 encountered by the rope loop 280 may be adjustable.

[0229] Apertures are optionally provided along the scraper mounting slots 812 for optionally securing the scraping body 822 to the main body 810 via the fasteners 828. For example, a nut may extend through the apertures arranged proximate the relevant scraping body 822 and be bolted at the other side, in addition to the central fastener 828 shown in Figure 44D.

[0230] The rope retention device 840 is removably coupled with the main body 810. In the present example, the rope retention device 840 is pivotably coupled with the main body 810. In some embodiments, the rope retention device 840 also comprises a scraping surface for contacting and scraping the rope loop 280.

[0231] The high-pressure rope washing device 850 is for enabling high-pressure water washing of the rope loop 280. The high-pressure rope washing device 850 comprises a frame 860, a spray shield 870, and a nozzle manifold 880. The frame 860 is for coupling the device 850 with the rope servicing platform 500, and for coupling the spray shield 870 and nozzle manifold 880 thereto. The spray shield 870 is for enclosing the high-pressure water washing of the rope loop 280, preventing water from spraying over nearby components and / or users. In other words, the spray shield 870 is configured to minimise the splashback from the nozzle manifold 880. The nozzle manifold 880 is for delivering high-pressure water to the rope loop 280, and in operation is fluidly coupled with a water supply (not shown).

[0232] The spray shield 870 comprises a shell 872 comprising primary aperture 874, for receiving a portion of the rope loop 280 therein, and an axial slit 876 for enabling entry and exit of the rope loop 280 to the primary aperture 874. In the present example, the shell 872 is substantially cylindrical, and is open-ended.

[0233] The nozzle manifold 880 comprises an outer portion 882, in the form of an open ring, to which one or more adjustable nozzles 886 are mounted. The outer portion 882 comprises a primary aperture 883, for receiving a portion of the rope loop 280 therein, and an opening for enabling entry and exit of the rope loop 280 to the primary aperture 883. The adjustable nozzles 886 are pivotably mounted on the outer portion 882, enabling adjustment of their angle and thus the angle of the high-pressure jet of water therefrom to the rope loop 280. In the present example, the nozzle manifold 880 comprises three nozzles 886, but in other embodiments may comprise fewer, for example one or two, or more, for example four, five, six, or more.

Claims

CLAIMS1 . A rope driving module for driving a section of seaweed cultivation rope, the driving module comprising a driving arrangement comprising: first and second continuous tracks defining a channel therebetween, wherein: the first continuous track is driven; and the second continuous track is passive; a first plurality of teeth distributed around a perimeter of the first continuous track; and a second plurality of teeth distributed around a perimeter of the second continuous track, wherein the first plurality of teeth engage with and drive the second plurality of teeth in the rope driving section.

2. The rope driving module of claim 1 , wherein the distribution of the first and second pluralities of teeth are substantially the same.

3. The rope driving module of claim 1 or 2, wherein the first and second continuous tracks are moveable between a first configuration and a second configuration, wherein: in the first configuration, the first and second continuous tracks are a first distance apart; in the second configuration, the first and second continuous tracks are a second distance apart; and the first and second distances are different.

4. The rope driving module of claim 3 wherein the second continuous track is moveable relative to the first continuous track.

5. The rope driving module of claim 3 or 4, wherein the second distance is adjustable.

6. The rope driving module of any preceding claim, wherein the channel comprises: a rope entry section for entry of the rope to the driving arrangement; and a rope driving section for driving of the rope by the driving arrangement, wherein: the rope entry section is arranged adjacent the rope driving section; in the rope entry section, leading to the rope driving section, the first and second continuous tracks converge; and in the rope driving section, the first and second continuous tracks are parallel.

7. The rope driving module of any preceding claim, wherein each tooth of the second plurality of teeth comprises: a base portion comprising an end surface arranged a first tooth distance from the perimeter of the second continuous track; and a protrusion extending from the base portion for engaging with the first plurality of teeth comprising an end surface arranged a second tooth distance from the perimeter of the second continuous track, wherein the second tooth distance is larger than the first tooth distance.

8. The rope driving module of any preceding claim, wherein each tooth of the first plurality of teeth comprises an end surface arranged a third tooth distance from the perimeter of the first continuous track, wherein the third tooth distance is smaller than the second tooth distance of the second plurality of teeth.

9. The rope driving module of any preceding claim, wherein each tooth comprises first and second tooth profiles defining a gap therebetween for receiving a section of the rope.

10. The rope driving module of claim 9, wherein each tooth comprises a bar portion extending between the first and second tooth profiles for engaging a section of the rope in use.

11. The rope driving module of any preceding claim, wherein the driving arrangement is bidirectional.

12. The rope driving module of any preceding claim, further comprising a plate on which the first and second continuous tracks are arranged, the plate comprising one or more rollers for supporting the rope.

13. A rope servicing platform for servicing a section of seaweed cultivation rope in a body of water, the platform comprising: a main body; and a rope driving module according to any preceding claim.

14. The rope servicing platform of claim 13, further comprising at least one of: a seaweed harvesting module for harvesting seaweed from the section of seaweed cultivation rope; a rope seeding module for seeding the section of seaweed cultivation rope with seaweed spores; and a rope cleaning module for cleaning the section of seaweed cultivation rope.

15. The rope servicing platform of claim 13 or 14, further comprising a frame for coupling at least one module thereto.

16. The rope servicing platform of claim 15, wherein the frame comprises at least one roller assembly for guiding the section of seaweed cultivation rope .

17. The rope servicing platform of any one of claims 13 to 16, wherein the rope servicing platform is a floating platform.

18. A seaweed cultivation system for cultivating and harvesting seaweed in a body of water, the system comprising: a submersible seaweed cultivation apparatus for cultivating seaweed on a rope loop, the apparatus comprising: a sheave arrangement for receiving and guiding the rope loop, the sheave arrangement comprising: a first sheave; and a second sheave; and a frame for adjusting and maintaining the distance between the first and second sheaves, the frame comprising at least one mooring arrangement for securing the frame to a structure or natural feature, the frame being coupled with the sheave arrangement; and a rope servicing platform according to any of claims 13 to 17.

19. The seaweed cultivation system of claim 18, wherein the rope loop extends through at least one module of the rope servicing platform.

20. The seaweed cultivation system of any of claims 18 to 19, wherein: at least one module of the rope servicing platform is arranged above a surface of the body of water; and at least one sheave of the submersible seaweed cultivation apparatus is arranged below the surface of the body of water.21 . Use of the seaweed cultivation system according to any of claims 18 to 20.

22. A method of harvesting seaweed, the method comprising the steps of:providing a seaweed cultivation system according to any one of claims 18 to 21, wherein the rope servicing platform is a rope system platform according to claim 14 or any of claims 15 to 17 when dependent upon claim 14 and comprises the harvesting module; operating the driving module and the harvesting module simultaneously.

Images