Slurry delivery device for deep sea polymetallic sulphide mining and method of installation thereof

Abstract

A kind of ore slurry conveying device for deep sea polymetallic sulphide mining and its installation method, including conveying hard tube, one end of conveying hard tube is matched with female joint, the other end of conveying hard tube is matched with male joint, connector is nested on male joint, fixed frame is sleeved on conveying hard tube at one side of connector, connector and fixed frame are connected by fixed bolt group;Passage is formed in female joint, conveying hard tube and male joint, channel partition is installed in passage.Using integrated, fast docking mode, effectively solve the existing polymetallic sulphide mining system in conveying hard tube low, poor bending resistance, communication and power cable is easy to be wound with pipe and the flow field of conveying hard tube and tail water pipe interference problem, effectively improve the safety and reliability of mining function components between mining ship and intermediate station, installation operation is convenient, greatly improve the migration efficiency of deep sea polymetallic sulphide mining system.

Description

Technical Field

[0001] This invention relates to the field of deep-sea mineral resource mining technology, and in particular to a slurry conveying device and its installation method for deep-sea polymetallic sulfide mining. Background Technology

[0002] Deep-sea polymetallic sulfides are distributed in small hydrothermal vent areas within deep-sea craters. These massive metallic sulfide deposits are rich in metals such as copper, iron, zinc, silver, and gold. The mineable deposits are the replacement ore bodies within sulfide mounds, chimneys, and the network of veins below them. Among various deep-sea mineral resource development models, the pipeline-lift mining system is currently recognized as the most commercially promising polymetallic sulfide mining system due to its advantages such as continuous operation, high mining efficiency, and relatively low energy consumption. Between the mining vessel and the intermediate station, there are mainly communication and power cable bundles, tailwater discharge pipes, and transport pipes. The communication and power cable bundles are mainly used for power supply and operational control of the underwater mining system; the tailwater pipe is mainly used to discharge treated tailings and wastewater near the seabed; and the transport pipes transport water and the solid-liquid two-phase flow slurry of polymetallic sulfides from the intermediate station to the surface mining vessel.

[0003] In the construction of deep-sea polymetallic sulfide mining systems, hundreds of rigid transport pipes are required. These pipes must be laid and connected one by one. Existing rigid pipes mostly use bolted flange connections, which have several drawbacks, such as difficulty in aligning flange bolt holes, time-consuming bolt tightening, and poor bending resistance. For deep-sea polymetallic sulfide resources, which are geographically dispersed, the mining system needs frequent relocation. Therefore, the deployment and retrieval time of the rigid pipe transport system is a significant factor affecting the overall efficiency of the mining system. Furthermore, communication and power cables are prone to entanglement with the transport pipes and tailrace pipes, leading to cable breakage and system malfunction. The close proximity of the transport pipes and tailrace pipes causes mutual influence of their flow fields, making their hydrodynamic and structural performance unpredictable and resulting in poor safety and reliability of the entire transport system. Summary of the Invention

[0004] To address the shortcomings of existing production technologies, this applicant provides a slurry conveying device and its installation method for deep-sea polymetallic sulfide mining. This device employs an integrated, rapid docking mode, effectively solving problems in existing polymetallic sulfide mining systems such as low efficiency in laying and recovering conveying pipes, poor bending resistance, easy entanglement of communication and power cables with pipelines, and mutual interference between the flow fields of the conveying pipes and tailrace pipes. It effectively improves the safety and reliability of mining functional components between the mining vessel and the intermediate station, is easy to install and operate, and greatly enhances the migration efficiency of the deep-sea polymetallic sulfide mining system.

[0005] The technical solution adopted in this invention is as follows:

[0006] A slurry conveying device for deep-sea polymetallic sulfide mining includes a conveying rigid pipe. A female connector is installed at one end of the conveying rigid pipe, and a male connector is installed at the other end of the conveying rigid pipe. A connector is nested on the male connector. A fixing frame is fitted on the conveying rigid pipe next to the connector. The connector and the fixing frame are connected to each other by a set of fixing bolts. A channel is formed inside the female connector, the conveying rigid pipe, and the male connector. A channel partition is installed through the channel.

[0007] As a further improvement to the above technical solution:

[0008] Both the female and male connectors are connected to the conveying rigid pipe by welding.

[0009] The mounting bracket is welded to the conveying rigid pipe and the male connector.

[0010] The female connector is provided with a first and a second clamping disc at intervals. The first and second clamping discs have the same structure. Each clamping disc has six teeth machined and distributed in a circumferential array. The inner wall of the female connector is machined with guide bosses. The female connector has a first and a second scale line pre-made on it.

[0011] The channel partition is machined at one end adjacent to the female connector. Feature: A machining is performed at one end adjacent to the male connector. Features, in the channel partition It features an inlaid irregularly shaped sealing gasket.

[0012] The structure of the fixing frame is as follows: it includes a fixing plate 1, a round hole in the middle of the fixing plate 1 that mates with the conveying rigid pipe, four elbow plates welded on the fixing plate 1, a fixing plate 2 welded on the upper part of the four elbow plates, the fixing plate 2 also having a round hole that mates with the conveying rigid pipe, and a corner of the fixing plate 1 connected to the buckle assembly by a hinge bolt.

[0013] The connector has the following structure: a connector body with a hollow cylindrical structure; a stop block is installed on the side of the connector body by screw one; a rotation hole is machined on the stop block; a position pointer is installed directly below the stop block by screw two; a lubricating oil injection hole is machined on one side wall of the connector body, and a sealing plug is installed in the hole; two layers of retaining plates are machined on the inner wall of the connector body, each layer of retaining plates has six teeth, distributed in a circumferential array, and the distribution characteristics of the retaining plates of the connector body are consistent with the distribution characteristics of the retaining plates of the female connector.

[0014] The included angle β of the scale extension line is equal to half of the included angle α between the center planes of two adjacent teeth on the connector body.

[0015] The male connector is machined with a bearing boss, a guide groove, and two radial sealing grooves, and a sealing ring is installed in the sealing groove. The inner diameter of the male connector is equal to the inner diameter of the conveying rigid pipe, and the bearing boss plays the role of transmitting the axial load between the male connector and the connector.

[0016] An installation method for a slurry conveying device for deep-sea polymetallic sulfide mining, comprising a slurry conveying device A and a slurry conveying device B, wherein the specific operating steps are as follows:

[0017] First, the clamping device above the moon pool of the mining vessel clamps the female connector of the slurry conveying device A. The lifting equipment lifts the slurry conveying device B on the deck and slowly lowers it. When the two slurry conveying devices are close to each other, the position of the slurry conveying device B is adjusted so that the guide boss of the female connector of the slurry conveying device A is aligned with the guide groove of the male connector of the slurry conveying device B.

[0018] The second step is to continue to slowly lower the slurry conveying device B until the connector of the slurry conveying device B is slightly lifted by the female connector of the slurry conveying device A, and then the lifting equipment slowly lifts back a short distance.

[0019] Third step, remove the fixing bolt group between the connector and the fixed frame on the slurry conveying device B, insert the force rod into the rotating hole of the connector block; rotate the connector of the slurry conveying device B so that the position pointer of the slurry conveying device B rotates from pointing to the first scale line to pointing to the second scale line.

[0020] Fourth step, continue to slowly lower the slurry conveying device B until the position pointer of the slurry conveying device B contacts the female connector of the slurry conveying device A, and slowly lift the hoisting equipment back a short distance; insert the force-adding rod into the rotating hole of the connector block of the slurry conveying device B, and rotate the connector of the slurry conveying device B so that the position pointer of the slurry conveying device B rotates from pointing to the second scale line back to pointing to the first scale line;

[0021] Fifth step, reinstall the fixing bolt group to fix the connector of slurry conveying device B to its fixing frame.

[0022] Step 6: Open the snap-fit ​​assembly on the B-connector of the slurry conveying device, install the communication and power umbilical cables into the closed loop formed by the snap-fit ​​assembly and the fixing plate, and install the hinge bolts.

[0023] Step 7: The clamping device above the moon pool of the mining vessel slowly loosens the female joint of the slurry conveying device A, and the installation of the two slurry conveying devices is completed.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention features a compact and rational structure, and is easy to operate. Through a unique design of the slurry conveying device, it effectively solves the problems existing in current polymetallic sulfide mining systems, such as low efficiency in laying and recovering conveying pipes, poor bending resistance of pipe joints, easy entanglement of communication and power cables with pipes, and mutual interference of flow fields between conveying pipes and tailrace pipes. It effectively improves the safety and reliability of mining functional components between mining vessels and intermediate stations, and is easy to install and operate, greatly improving the safety, reliability, and migration efficiency of deep-sea polymetallic sulfide mining systems.

[0026] The channel partition of the present invention divides the conveying channel of the slurry conveying device into two. Channel one is used to convey the polymetallic sulfide slurry in the relay station to the mining vessel, and channel two is used to discharge the treated tailings into the seabed. The integrated conveying channel overcomes the adverse factors of mutual influence between the flow fields of the two independent pipelines.

[0027] The slurry conveying device of the present invention resists bending moment loads caused by complex marine environments through the mating surfaces of male and female joints, and its bending resistance is significantly enhanced compared with the traditional bolt flange connection structure.

[0028] The slurry conveying device of the present invention can constrain the communication and power umbilical cables in the horizontal direction, which not only avoids them from getting tangled with the surrounding pipelines, but also does not restrict their freedom in the vertical direction, thus meeting the requirements of the mining system for depth compensation of its length changes.

[0029] The slurry conveying device of the present invention can connect two sets of conveying devices through a rotary connector, which greatly improves the deployment and recovery efficiency of polymetallic sulfide mining systems.

[0030] The groove of the male connector and the boss of the female connector of the slurry conveying device described in this invention not only improves the alignment efficiency of the two sets of slurry conveying devices, but also restricts the relative rotation between the two sets of devices and resists the torque load that the entire conveying system may suffer during service.

[0031] The slurry conveying device channel partition of the present invention Features, irregularly shaped gaskets and After installation, the feature forms a reliable sealed structure, ensuring that channel one and channel two will not leak from each other. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of the female connector of the present invention.

[0034] Figure 3 for Figure 2Full sectional view along section AA.

[0035] Figure 4 for Figure 2 Full sectional view along section BB.

[0036] Figure 5 This is a half-sectional view of the female connector of the present invention.

[0037] Figure 6 This is an end view of the female connector of the present invention.

[0038] Figure 7 This is a schematic diagram of the channel partition of the present invention.

[0039] Figure 8 This is a schematic diagram of the structure of the fixing frame of the present invention.

[0040] Figure 9 This is a schematic diagram of the connector structure of the present invention.

[0041] Figure 10 This is a front view of the connector of the present invention (showing the internal structure).

[0042] Figure 11 For the present invention Figure 10 Full sectional view along section AA.

[0043] Figure 12 For the present invention Figure 10 Full sectional view along section BB.

[0044] Figure 13 This is a schematic diagram of the male connector of the present invention.

[0045] Figure 14 This is a schematic diagram of a pipeline-lifted polymetallic sulfide mining system.

[0046] Among them: 10, female connector; 20, conveying rigid pipe; 30, channel partition; 40, fixing bracket; 50, fixing bolt group; 60, connector; 70, male connector;

[0047] 11. Crank plate No. 1; 12. Crank plate No. 2; 13. Guide boss; 14. Scale line No. 1; 15. Scale line No. 2;

[0048] 31. Irregularly shaped sealing gaskets;

[0049] 41. Fixing plate one; 42. Elbow plate; 43. Fixing plate two; 44. Clip assembly; 45. Hinge bolt;

[0050] 61. Connector body; 62. Screw 1; 63. Stop; 64. Rotation hole; 65. Screw 2; 66. Position pointer; 67. Injection hole; 68. Sealing plug;

[0051] 71. Bearing boss; 72. Guide groove; 73. Sealing ring; 74. Sealing groove. Detailed Implementation

[0052] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0053] like Figures 1-14 As shown, the slurry conveying device for deep-sea polymetallic sulfide mining in this embodiment includes a conveying rigid pipe 20. A female connector 10 is installed at one end of the conveying rigid pipe 20, and a male connector 70 is installed at the other end of the conveying rigid pipe 20. A connector 60 is nested on the male connector 70. A fixing frame 40 is fitted on the conveying rigid pipe 20 next to the connector 60. The connector 60 and the fixing frame 40 are connected to each other by a set of fixing bolts 50. A channel is formed inside the female connector 10, the conveying rigid pipe 20, and the male connector 70, and a channel partition 30 is installed through the channel.

[0054] Both the female connector 10 and the male connector 70 are connected to the conveying rigid pipe 20 by welding.

[0055] The fixing frame 40 is welded to the conveying rigid pipe 20 and the male connector 70.

[0056] The female connector 10 is provided with a first clamping plate 11 and a second clamping plate 12 spaced apart. The first clamping plate 11 and the second clamping plate 12 have the same structure. Each clamping plate has six teeth machined and distributed in a circumferential array. The inner wall of the female connector 10 is machined with a guide boss 13. The female connector 10 has a first scale line 14 and a second scale line 15 pre-made on it.

[0057] The channel partition 30 has a section machined at one end adjacent to the female connector 10. Feature, with a machining on one end adjacent to the male connector 70 Features, in the channel partition 30 It features an irregularly shaped sealing gasket 31.

[0058] The structure of the fixing frame 40 is as follows: it includes a fixing plate 41, a round hole in the middle of the fixing plate 41 that mates with the conveying rigid pipe 20, four elbow plates 42 welded on the fixing plate 41, a fixing plate 43 welded on the upper part of the four elbow plates 42, a fixing plate 43 that also has a round hole that mates with the conveying rigid pipe 20, and a corner of the fixing plate 41 is connected to the buckle assembly 44 by a hinge bolt 45.

[0059] The connector 60 has the following structure: it includes a connector body 61 with a hollow cylindrical structure. A stop 63 is installed on the side of the connector body 61 by screw 62. A rotating hole 64 is machined on the stop 63. A position pointer 66 is installed directly below the stop 63 by screw 65. A lubricating oil injection hole 67 is machined on one side wall of the connector body 61. A sealing plug 68 is installed in the hole. Two layers of toothed discs are machined on the inner wall of the connector body 61. Each toothed disc has six teeth and is distributed in a circumferential array. The distribution characteristics of the toothed discs of the connector body 61 are consistent with the distribution characteristics of the toothed discs of the female connector 10.

[0060] The included angle β of the scale extension line is equal to half of the included angle α between the center planes of two adjacent teeth on the connector body 61.

[0061] The male connector 70 is machined with a bearing boss 71, a guide groove 72, and two radial sealing grooves 74. A sealing ring 73 is installed in the sealing groove 74. The inner diameter of the male connector 70 is equal to the inner diameter of the conveying hard pipe 20. The bearing boss 71 plays the role of transmitting the axial load between the male connector 70 and the connector 60.

[0062] The specific structure and function of the slurry conveying device for deep-sea polymetallic sulfide mining described in this invention are as follows:

[0063] The system mainly includes a conveying rigid pipe 20, one end of which is welded to a female connector 10, and the other end to a male connector 70. A connector 60 is nested on the male connector 70. A fixing frame 40 is welded to the conveying rigid pipe 20 and the male connector 70. A channel partition 30 is welded through and within the channel formed by the connection of the female connector 10, the conveying rigid pipe 20, and the male connector 70. The connector 60 and the fixing frame 40 are connected to each other by a set of fixing bolts 50. Depending on the operating water depth of the mining system, the polymetallic sulfide conveying system is assembled from several sets of slurry conveying devices.

[0064] The female connector 10 is a rotating structure with a first-order clamping disc 11 and a second-order clamping disc 12 machined on its exterior. Each clamping disc has six teeth arranged in a circumferential array. The inner wall of the female connector 10 has guide bosses 13 machined on it. The female connector 10 has a first-order graduation line 14 and a second-order graduation line 15 pre-made on it. The included angle β of the extended graduation lines is equal to half of the included angle α between the center planes of two adjacent teeth on the connector body 61.

[0065] The channel partition 30 has a section machined at one end adjacent to the female connector 10. Feature, with a machining on one end adjacent to the male connector 70 Features; in the channel partition 30 In terms of features, it is inlaid with an irregularly shaped sealing gasket 31.

[0066] like Figure 4As shown, the fixing frame 40 includes a fixing plate 41, on which four elbow plates 42 are welded. A fixing plate 43 is welded to the upper part of the elbow plates. The fixing plate 41 is connected to the buckle assembly 44 by hinge bolts 45.

[0067] Connector 60 includes a connector body 61, on which a stop 63 is mounted on its side by screw 62. Directly below the stop 63, a position pointer 66 is mounted by screw 65. A lubricating oil injection hole 67 is machined on the connector body 61, and a sealing plug 68 is installed inside the hole. Two layers of retaining discs are machined inside the connector body 61, each layer having six teeth arranged in a circumferential array. The tooth distribution characteristics of the connector body 61 are consistent with those of the female connector 10. A rotating hole 64 is machined on the stop.

[0068] The male connector 70 is machined with a bearing boss 71, a guide groove 72, and two radial sealing ring 74 mounting slots, in which sealing rings 73 are installed. The inner diameter of the male connector 70 is equal to the inner diameter of the conveying rigid pipe 20. The bearing boss 71 serves to transmit the axial load between the male connector 70 and the connector 60.

[0069] To facilitate the explanation of the installation method, two sets of polymetallic sulfide slurry conveying devices (referred to as slurry conveying device A and slurry conveying device B, respectively) are used for illustration. An installation method for a slurry conveying device for deep-sea polymetallic sulfide mining includes the following steps:

[0070] First, the clamping device above the moon pool of the mining vessel clamps the female connector 10 of the slurry conveying device A, and the lifting equipment lifts the slurry conveying device B on the deck and slowly lowers it. When the two slurry conveying devices are close together, the position of the slurry conveying device B is adjusted so that the guide boss 13 of the female connector of the slurry conveying device A is aligned with the guide groove 72 of the male connector of the slurry conveying device B.

[0071] The second step is to continue to slowly lower the slurry conveying device B until the connector 60 of the slurry conveying device B is slightly lifted by the female connector 10 of the slurry conveying device A, and then the lifting equipment slowly lifts back a short distance (about 5mm).

[0072] Third, remove the fixing bolt group 50 between the connector 60 and the fixing frame 40 on the slurry conveying device B, and insert the force rod into the rotating hole 64 of the connector block 63; rotate the connector 60 of the slurry conveying device B so that the position pointer 66 of the slurry conveying device B rotates from pointing to the first scale line 14 to pointing to the second scale line 15.

[0073] Fourth step, continue to slowly lower the slurry conveying device B until the position pointer 66 of the slurry conveying device B contacts the female connector 10 of the slurry conveying device A, and slowly lift the hoisting equipment back a short distance (about 5mm); insert the force-adding rod into the rotating hole 64 of the connector block 63 of the slurry conveying device B, and rotate the connector 60 of the slurry conveying device B so that the position pointer 66 of the slurry conveying device B rotates from pointing to the second scale line 15 to pointing to the first scale line 14.

[0074] Fifth step, reinstall the fixing bolt group 50 to fix the connector 60 of the slurry conveying device B to its fixing bracket 40.

[0075] Step 6: Open the snap-fit ​​assembly 44 on the slurry conveying device B-connector, install the communication and power umbilical cable into the closed loop formed by the snap-fit ​​assembly 44 and the fixing plate 41, and install the hinge bolt 45.

[0076] Step 7: The clamping device above the moon pool of the mining vessel slowly releases the female connector of slurry conveying device A, completing the installation of both slurry conveying devices. The recovery process of the slurry conveying device is the reverse of the installation process, and will not be described in detail here.

[0077] In this embodiment, the channel partition 30 divides the conveying channel of the slurry conveying device into two. Channel one is used to convey the polymetallic sulfide slurry from the relay station to the mining vessel, and channel two is used to discharge the treated tailings and wastewater into the seabed. The integrated conveying channel overcomes the adverse factors of mutual influence between the flow fields of the two independent pipelines; the channel partition 30 Features, irregularly shaped gaskets and After installation, the feature forms a reliable sealed structure, ensuring that channel one and channel two will not leak from each other.

[0078] In this embodiment, the slurry conveying device resists the bending moment load caused by the complex marine environment through the mating surfaces of the male connector 70 and the female connector 10. Compared with the traditional bolt flange connection structure, the bending resistance is significantly enhanced.

[0079] In this embodiment, the slurry conveying device can constrain the communication and power umbilical cables in the horizontal direction, which not only prevents them from getting tangled with the surrounding pipelines, but also does not restrict their degree of freedom in the vertical direction, thus meeting the requirements of the mining system for depth compensation of its length changes.

[0080] In this embodiment, the slurry conveying device can connect the two conveying devices through the rotary connector 60, which greatly improves the deployment and recovery efficiency of the polymetallic sulfide mining system.

[0081] In this embodiment, the guide groove 72 of the male connector and the guide boss 13 of the female connector of the slurry conveying device not only improve the alignment efficiency of the two sets of slurry conveying devices, but also limit the relative rotation between the two sets of devices and resist the torque load that the entire conveying system may suffer during service.

[0082] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A slurry delivery device for deep sea polymetallic sulphide mining, characterised in that: The system includes a conveying rigid pipe (20), one end of which is fitted with a female connector (10), and the other end of which is fitted with a male connector (70). A connector (60) is nested on the male connector (70), and a fixing frame (40) is fitted on the conveying rigid pipe (20) next to the connector (60). The connector (60) and the fixing frame (40) are connected to each other by a set of fixing bolts (50). A channel is formed inside the female connector (10), the conveying rigid pipe (20), and the male connector (70), and a channel partition (30) is installed through the channel. The structure of the fixing frame (40) is as follows: it includes a fixing plate one (41), a round hole in the middle of the fixing plate one (41) that mates with the conveying hard pipe (20), four elbow plates (42) are welded on the fixing plate one (41), and a fixing plate two (43) is welded on the upper part of the four elbow plates (42). The fixing plate two (43) also has a round hole that mates with the conveying hard pipe (20). One corner of the fixing plate one (41) is connected to the buckle assembly (44) by a hinge bolt (45). The connector (60) has the following structure: it includes a connector body (61) with a hollow cylindrical structure. A stop (63) is installed on the side of the connector body (61) by a screw (62). A rotating hole (64) is machined on the stop (63). A position pointer (66) is installed directly below the stop (63) by a screw (65). A lubricating oil injection hole (67) is machined on one side wall of the connector body (61). A sealing plug (68) is installed in the hole. Two layers of toothed discs are machined on the inner wall of the connector body (61). Each toothed disc has six teeth and is distributed in a circumferential array. The distribution characteristics of the toothed discs of the connector body (61) are consistent with the distribution characteristics of the toothed discs of the female connector (10). The male connector (70) is machined with a bearing boss (71), a guide groove (72) and two radial sealing grooves (74), and a sealing ring (73) is installed in the sealing groove (74); the inner diameter of the male connector (70) is equal to the inner diameter of the conveying hard pipe (20), and the bearing boss (71) plays the role of transmitting the axial load between the male connector (70) and the connector (60).

2. The deep sea polymetallic sulfide ore mining oriented slurry delivery device according to claim 1, characterized by: Both the female connector (10) and the male connector (70) are connected to the conveying rigid pipe (20) by welding.

3. The deep sea polymetallic sulfide ore mining oriented slurry delivery device according to claim 1, characterized by: The mounting bracket (40) is welded to the conveying rigid pipe (20) and the male connector (70).

4. The slurry conveying device for deep-sea polymetallic sulfide mining as described in claim 1, characterized in that: The female connector (10) is provided with a first clamping plate (11) and a second clamping plate (12) spaced apart. The first clamping plate (11) and the second clamping plate (12) have the same structure. Each clamping plate has six teeth processed and distributed in a circumferential array. The inner wall of the female connector (10) is processed with a guide boss (13). The female connector (10) has a first scale line (14) and a second scale line (15) pre-made on it.

5. The slurry conveying device for deep-sea polymetallic sulfide mining as described in claim 1, characterized in that: The channel partition (30) has a "" machined at one end adjacent to the female connector (10) "Feature, with a machining on one end adjacent to the male connector (70)" "Features, in the channel partition (30)" "Features include an irregularly shaped sealing gasket (31)." 6. The slurry conveying device for deep-sea polymetallic sulfide mining as described in claim 4, characterized in that: The angle β between the extension of the first scale line (14) and the extension of the second scale line (15) is equal to half of the angle α between the center planes of two adjacent teeth on the connector body (61).

7. A method of installing a slurry delivery apparatus for deep sea polymetallic sulphide mining as claimed in claim 4, characterised in that: The system includes slurry conveying device A and slurry conveying device B. The specific operating steps are as follows: First, the clamping device above the moon pool of the mining ship clamps the female connector (10) of the slurry conveying device A, and the lifting equipment lifts the slurry conveying device B on the deck and slowly lowers it. When the two slurry conveying devices are close to each other, the position of the slurry conveying device B is adjusted so that the guide boss (13) of the female connector of the slurry conveying device A is aligned with the guide groove (72) of the male connector of the slurry conveying device B. The second step is to continue to slowly lower the slurry conveying device B until the connector (60) of the slurry conveying device B is slightly lifted by the female connector (10) of the slurry conveying device A, and the lifting equipment slowly lifts back a short distance. Third step, remove the fixing bolt group (50) between the connector (60) and the fixing frame (40) on the slurry conveying device B, insert the force rod into the rotating hole (64) of the connector block (63); rotate the connector (60) of the slurry conveying device B so that the position pointer (66) of the slurry conveying device B rotates from pointing to the first scale line (14) to pointing to the second scale line (15). Fourth step, continue to slowly lower the slurry conveying device B until the position pointer (66) of the slurry conveying device B contacts the female connector (10) of the slurry conveying device A, and slowly lift the hoisting equipment back a short distance; insert the force rod into the rotating hole (64) of the connector block (63) of the slurry conveying device B, and rotate the connector (60) of the slurry conveying device B so that the position pointer (66) of the slurry conveying device B turns back from pointing to the second scale line (15) to pointing to the first scale line (14). Fifth step, reinstall the fixing bolt group (50) to fix the position of the connector (60) of the slurry conveying device B and its fixing frame (40); Step 6: Open the snap-fit ​​assembly (44) on the slurry conveying device B-connector, install the communication and power umbilical cable into the closed loop formed by the snap-fit ​​assembly (44) and the fixing plate (41), and install the hinge bolt (45). Step 7: The clamping device above the moon pool of the mining vessel slowly loosens the female joint of the slurry conveying device A, and the installation of the two slurry conveying devices is completed.

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