Rotary joint for deep sea

Abstract

The utility model relates to the technical field of rotary joints for deep sea cleaning, and particularly discloses a rotary joint for deep sea, which comprises a fixed joint, a first rotary joint, a second rotary joint and an end cover, one end of the first rotating connector penetrates through the oil storage cavity and then is inserted into the first fluid channel, a second rotating connector is arranged at the other end of the first rotating connector in a rotating mode, a plurality of sealing pieces are arranged between the outer wall of the first rotating connector and the first fluid channel of the fixed connector, and a plurality of bearings are arranged between the outer wall of the first rotating connector and the inner wall of the oil storage cavity. The two ends of the first rotating joint are arranged in the fixed joint and the second rotating joint respectively, so that the first rotating joint is matched with the fixed joint and the second rotating joint, meanwhile, the protection effect can be achieved, and seawater is effectively prevented from entering the rotating joints from the connecting ends on the two sides; and medium pollution caused by bearing corrosion in the oil storage cavity is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep-sea cleaning rotary joints, in particular to a deep-sea rotary joint. Background Art

[0002] A rotary joint is a closed rotating connector that transports fluid media (oil, gas, water, etc.) from a fixed pipeline to the rotating parts of the equipment. It can be divided into single-channel, double-channel and multi-channel forms.

[0003] Commonly used rotary joints are generally used in atmospheric environments, and the rotating parts of the rotary joints only need one-way sealing to prevent the high-pressure fluid in the joints from leaking out. In the deep-sea cleaning industry, the rotary joints will be subjected to the pressure from seawater. Excessive seawater pressure will cause seawater to enter the rotating parts of the rotary joints, thereby causing corrosion of the parts in the rotary joints. Over time, corrosion and rust will be generated in the rotary joints, causing fluid medium pollution. Therefore, it is urgently necessary to design a deep-sea rotary joint to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a deep-sea rotary joint, which solves the above-mentioned problem that seawater may enter the rotating parts of the rotary joint and cause corrosion of the parts in the rotary joint, which may cause corrosion and rust in the rotary joint over a long period of time and cause fluid medium pollution.

[0005] In order to solve the above technical problems, the utility model provides a deep-sea rotary joint, comprising a fixed joint, a first rotary joint, a second rotary joint and an end cover, wherein the fixed joint is provided with a liquid inlet channel, a first fluid channel and an oil storage chamber which are interconnected in sequence, one end of the first rotary joint passes through the oil storage chamber and is inserted into the first fluid channel, and the other end is screwed with the second rotary joint, a plurality of seals are arranged between the outer wall of the first rotary joint and the first fluid channel of the fixed joint, a plurality of bearings are arranged between the outer wall of the first rotary joint and the inner wall of the oil storage chamber, the end cover is sleeved on the first rotary joint and is arranged at the end of the fixed joint, a sealing ring is arranged between the inner wall of the end cover and the outer wall of the first rotary joint, a second fluid channel is arranged in the first rotary joint, a third fluid channel is arranged in the second rotary joint, and the third fluid channel is connected with the second fluid channel and the first fluid channel.

[0006] Furthermore, the second rotary joint is composed of a matching portion and a connecting portion, the matching portion is truncated cone-shaped, and the vertical cross-section of the connecting portion is cross-shaped.

[0007] Furthermore, the third fluid channel is composed of a main channel and four branch channels, the four branch channels form a cross channel, the main channel is a straight channel, the straight channel is arranged in the matching part, and one end is connected to the second fluid channel, and the other end is connected to the middle of the cross channel, the four branch channels are arranged in the connecting part, and the liquid outlet of each branch channel is connected to the injection pipe.

[0008] Furthermore, a first limiting column is fixedly provided on the outer wall of the first rotating joint, and a plurality of limiting grooves are provided on the outer wall of the first rotating joint away from the first limiting column, and a second limiting column is correspondingly inserted into each of the limiting grooves.

[0009] Furthermore, the number of the plurality of bearings is at least two, and the plurality of bearings are arranged in parallel, and outer sides of the bearings at the left and right ends are respectively against the first limiting column and the second limiting column.

[0010] Furthermore, several of the sealing members are first Gray rings, and the number of the several sealing members is at least two and they are arranged at intervals.

[0011] Furthermore, an annular boss is provided on the inner end surface of the end cover extending into the oil storage cavity, and the inner end surface of the annular boss abuts against the rightmost end surface of the bearing.

[0012] Furthermore, an adjustment gasket is provided between the end cover and the fixed joint, and the two are fixed by bolts.

[0013] Furthermore, a second grid ring is embedded on the outer wall of the end cover, and the outer side of the second grid ring abuts against the inner wall of the oil storage cavity.

[0014] Furthermore, the second rotary joint is fixed to the first rotary joint via threads, the second rotary joint is fixed to the first rotary joint via threads, and a rubber ring is provided between the two.

[0015] Beneficial effects of the utility model: The two ends of the first rotary joint of the utility model are respectively arranged in the fixed joint and the second rotary joint, so as to cooperate with the fixed joint and the second rotary joint and also play a protective role, effectively preventing seawater from entering the interior of the rotary joint from the connecting ends on both sides, so as to avoid bearing corrosion in the oil storage cavity and cause medium pollution;

[0016] The design of the sealing ring between the inner wall of the end cover and the outer wall of the first rotary joint and the second Gly ring between the outer wall of the end cover and the oil storage chamber can effectively prevent seawater from entering the oil storage chamber of the fixed joint from the gap between the end cover and the first rotary joint, thereby improving the sealing inside the fixed joint, while preventing seawater from corroding several bearings in the oil storage chamber, and can also effectively prevent the grease of the bearing from leaking out and polluting the external environment;

[0017] The design of the liquid inlet channel, the first fluid channel, the oil storage chamber, the second fluid channel and the third fluid channel can make the fluid flow along the designed channels without being easily deviated, and a plurality of seals are arranged between the outer wall of the first rotary joint and the first fluid channel of the fixed joint, which can further improve the sealing performance in the fixed joint and avoid the problem of corrosion of the bearing;

[0018] The design of the second rotary joint allows the fluid to enter and exit through the four branch channels in the cross-shaped connection part, and then enter or exit from the main channel, so as to improve the fluid flowability and reduce the problem of seawater infiltration from the connection gap caused by multiple pipe connections;

[0019] The shape design of the third fluid channel can reduce the pressure in the rotary joint by diverting the fluid, so as to prevent the explosion between the parts of the rotary joint caused by excessive pressure, so as to improve the durability and safety performance of the rotary joint;

[0020] The design of the annular boss of the end cover and the first limiting column and the second limiting column can effectively limit the bearing to prevent the bearing from being stuck due to being unable to move synchronously with the first rotating joint during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a cross-sectional view of a deep-sea rotary joint of the utility model;

[0023] In the figure: 1-fixed joint, 2-first rotary joint, 3-second rotary joint, 4-end cover, 5-seal, 6-bearing, 7-adjustment gasket, 8-bolt, 9-second grid ring, 10-rubber ring, 11-liquid inlet channel, 12-first fluid channel, 13-oil storage chamber, 14-seal ring, 21-second fluid channel, 22-first limit column, 24-second limit column, 31-third fluid channel, 32-matching part, 33-connecting part, 41-annular boss, 311-main channel, 312-branch channel. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings of the utility model specification to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In a specific embodiment of the present invention, Figure 1 As shown, a deep-sea rotary joint is specifically disclosed, including a fixed joint 1, a first rotary joint 2, a second rotary joint 3 and an end cover 4. The fixed joint 1 is provided with a liquid inlet channel 11, a first fluid channel 12 and an oil storage chamber 13 which are interconnected in sequence. A through hole for installing an oil cup is provided on the side wall of the fixed joint 1, and the through hole is connected with the oil storage chamber 13. One end of the first rotary joint 2 passes through the oil storage chamber 13 and is inserted into the first fluid channel 12, and the other end is screwed with the second rotary joint 3. The two ends of the first rotary joint 2 are respectively arranged in the fixed joint 1 and the second rotary joint 3, so as to cooperate with the fixed joint 1 and the second rotary joint 3 and also play a protective role, effectively preventing seawater from entering the interior of the rotary joint from the connecting ends on both sides, so as to avoid corrosion of the bearing 6 in the oil storage chamber 13 and cause medium pollution;

[0026] A plurality of seals 5 are arranged between the outer wall of the first rotary joint 2 and the first fluid channel 12 of the fixed joint 1. The plurality of seals 5 are all first grid rings. The number of the plurality of seals 5 is at least two and they are arranged at intervals. A plurality of bearings 6 are arranged between the outer wall of the first rotary joint 2 and the inner wall of the oil storage cavity 13. The number of the plurality of bearings 6 is at least two and the plurality of bearings 6 are arranged in parallel. The outer sides of the left and right end bearings 6 after being arranged in parallel are respectively against the first limit column 22 and the second limit column 24.

[0027] The end cover 4 is sleeved on the first rotary joint 2 and is arranged at the end of the fixed joint 1. The inner end surface of the end cover 4 extending into the oil storage cavity 13 is provided with an annular boss 41, and the inner end surface of the annular boss 41 abuts against the rightmost end surface of the bearing 6. The design of the annular boss 41 of the end cover 4 and the first limiting column 22 and the second limiting column 24 can effectively limit the bearing 6 to prevent the bearing 6 from being unable to move synchronously with the first rotary joint 2 during rotation and causing a jam;

[0028] An adjusting gasket 7 is provided between the end cover 4 and the fixed joint 1, and the two are fixed by bolts 8. A second Gly ring 9 is embedded on the outer wall of the end cover 4, and the outer side of the second Gly ring 9 abuts against the inner wall of the oil storage chamber 13. A sealing ring 14 is embedded on the inner wall of the end cover 4. The sealing ring 14 is preferably a Gly ring, and the inner wall of the sealing ring 14 abuts against the outer wall of the first rotary joint 2. The design of the sealing ring 14 between the inner wall of the end cover 4 and the outer wall of the first rotary joint 2 and the second Gly ring 9 between the outer wall of the end cover and the oil storage chamber 13 can effectively prevent seawater from entering the oil storage chamber 13 of the fixed joint 1 from the gap between the end cover 4 and the first rotary joint 2, so as to avoid seawater from corroding several bearings 6 in the oil storage chamber 13, and can also effectively prevent the grease of the bearing 6 from leaking out and polluting the external environment.

[0029] A second fluid channel 21 is provided in the first rotary joint 2, a third fluid channel 31 is provided in the second rotary joint 3, the third fluid channel 31 is connected with the second fluid channel 21 and the first fluid channel 12, the design of the liquid inlet channel 11, the first fluid channel 12, the oil storage chamber 13, the second fluid channel 21 and the third fluid channel 31 can make the fluid flow along the designed channel without being easily deviated, and a plurality of sealing members 5 are provided between the outer wall of the first rotary joint 2 and the first fluid channel 12 of the fixed joint 1, which can further improve the sealing performance in the fixed joint 1 and avoid the problem of corrosion of the bearing 6;

[0030] A first limiting column 22 is fixedly provided on the outer wall of the first rotating joint 2 , and a plurality of limiting grooves are provided on the outer wall of the first rotating joint 2 away from the first limiting column 22 , and a second limiting column 24 is correspondingly inserted into each limiting groove.

[0031] The second rotary joint 3 is composed of a matching portion 32 and a connecting portion 33. The matching portion 32 is truncated, and the vertical section of the connecting portion 33 is cross-shaped. The second rotary joint 3 is fixed to the first rotary joint 2 by threads. The second rotary joint 3 is fixed to the first rotary joint 2 by threads, and a rubber ring 10 is arranged between the two. The threads of the second rotary joint 3 and the first rotary joint 2 are reverse threads. The third fluid channel 31 is composed of a main channel 311 and four branch channels 312. The four branch channels 312 form a cross channel. The main channel 311 is a straight channel. The straight channel is arranged in the matching portion 32, and one end is connected to the second fluid channel 21, and the other end is connected to the middle of the cross channel. Four branch channels 312 are arranged in the connecting portion 33, and the outlet of each branch channel 312 is connected to the injection pipe. The design of the second rotary joint 3 can make the fluid enter and exit through the four branch channels 312 in the cross connecting portion 33, and then enter the main channel 311 or be output from the main channel 311, so as to improve the fluidity of the fluid and reduce the problem of seawater infiltration from the connection gap caused by multiple pipe connections.

[0032] The shape design of the third fluid channel 31 can reduce the pressure in the rotary joint by diverting the fluid to prevent the rotary joint parts from bursting due to excessive pressure, thereby improving the durability and safety performance of the rotary joint.

[0033] The workflow of this utility model:

[0034] A high-pressure fluid pipeline is connected to the liquid inlet channel 11 of the fixed joint 1. When working, the high-pressure fluid enters the fixed joint 1 from the high-pressure fluid pipeline, and flows from the first fluid channel 12 to the second fluid channel 21 of the first rotary joint 2, and then enters from the main channel 311 of the third fluid channel 31, and flows from the four branch channels 312 to the injection pipeline, and then flows to the injection device. When the injection end of the injection device injects the high-pressure fluid, it drives the first rotary joint 2 and the second rotary joint 3 to rotate at a high speed. The thread rotation direction of the first rotary joint 2 and the second rotary joint 3 is opposite to the rotation direction, which effectively prevents the first rotary joint 2 and the second rotary joint 3 from loosening, and at the same time, the rubber ring 10 between the second rotary joint 3 and the first rotary joint 2 effectively prevents seawater from penetrating into the rotary joint from the connection between the two.

[0035] The plurality of seals 5 between the first fluid channel 12 of the fixed joint 1 and the first rotary joint 2 can effectively prevent the high-pressure fluid from leaking out from the gap therebetween during the flow process, can ensure that the 50MPa pressure fluid has no leakage, and at the same time can be compatible with the entry of all liquid medium fluids;

[0036] The design of the sealing ring 14 between the inner wall of the end cover 4 and the outer wall of the first rotary joint 2 and the second Gly ring 9 between the outer wall of the end cover and the oil storage chamber 13 can effectively prevent seawater from entering the oil storage chamber 13 of the fixed joint 1 through the gap between the end cover 4 and the first rotary joint 2, so as to avoid seawater from corroding the bearings 6 in the oil storage chamber 13, and can also effectively prevent the grease of the bearings 6 from leaking out and polluting the external environment;

[0037] The utility model effectively improves the sealing performance of the rotary joint through the covering connection mode and the multi-directional sealing mode, can effectively prevent seawater from penetrating into the rotary joint, and can also prevent the problem of pollution caused by grease leakage generated when the bearing rotates.

[0038] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A deep-sea rotary joint, characterized in that: The invention comprises a fixed joint (1), a first rotating joint (2), a second rotating joint (3) and an end cover (4); the fixed joint (1) is provided with a liquid inlet channel (11), a first fluid channel (12) and an oil storage chamber (13) which are interconnected in sequence; one end of the first rotating joint (2) passes through the oil storage chamber (13) and is inserted into the first fluid channel (12); the other end of the first rotating joint (2) is rotatably provided with the second rotating joint (3); a plurality of sealing members (5) are provided between the outer wall of the first rotating joint (2) and the first fluid channel (12) of the fixed joint (1); A plurality of bearings (6) are provided between the outer wall of the joint (2) and the inner wall of the oil storage chamber (13); the end cover (4) is sleeved on the first rotary joint (2) and arranged at the end of the fixed joint (1); a sealing ring (14) is provided between the inner wall of the end cover (4) and the outer wall of the first rotary joint (2); a second fluid channel (21) is provided in the first rotary joint (2); a third fluid channel (31) is provided in the second rotary joint (3); and the third fluid channel (31) is communicated with the second fluid channel (21) and the first fluid channel (12).

2. A deep-sea rotary joint according to claim 1, characterized in that: The second rotary joint (3) is composed of a matching portion (32) and a connecting portion (33); the matching portion (32) is truncated cone-shaped, and the vertical section of the connecting portion (33) is cross-shaped.

3. A deep-sea rotary joint according to claim 2, characterized in that: The third fluid channel (31) is composed of a main channel (311) and four branch channels (312), the four branch channels (312) forming a cross channel, the main channel (311) is a straight channel, the straight channel is arranged in the matching portion (32), one end of the straight channel is connected to the second fluid channel (21), and the other end is connected to the middle of the cross channel, the four branch channels (312) are arranged in the connecting portion (33), and each of the branch channels (312) is connected to an injection pipe.

4. A deep-sea rotary joint according to claim 1, characterized in that: A first limiting column (22) is fixedly arranged on the outer wall of the first rotating joint (2), and a plurality of limiting grooves are provided on the outer wall of the first rotating joint (2) away from the first limiting column (22), and a second limiting column (24) is correspondingly inserted into each of the limiting grooves.

5. A deep-sea rotary joint according to claim 4, characterized in that: The number of the plurality of bearings (6) is at least two, and the plurality of bearings (6) are arranged in parallel, with the outer sides of the bearings (6) at the left and right ends respectively abutting against the first limiting column (22) and the second limiting column (24).

6. A deep-sea rotary joint according to claim 1, characterized in that: The plurality of sealing members (5) are all first gray rings, and the number of the plurality of sealing members (5) is at least two and they are arranged at intervals.

7. A deep-sea rotary joint according to claim 1, characterized in that: An annular boss (41) is provided on the inner end surface of the end cover (4) extending into the oil storage cavity (13), and the inner end surface of the annular boss (41) abuts against the rightmost end surface of the bearing (6).

8. The deep-sea rotary joint according to claim 1, characterized in that: An adjusting gasket (7) is provided between the end cover (4) and the fixed joint (1), and the two are fixed by bolts (8).

9. A deep-sea rotary joint according to claim 1, characterized in that: A second grid ring (9) is embedded on the outer wall of the end cover (4), and the outer side of the second grid ring (9) abuts against the inner wall of the oil storage cavity (13).

10. A deep-sea rotary joint according to claim 1, characterized in that: The second rotating joint (3) and the first rotating joint (2) are fixed via threads, and the second rotating joint (3) and the first rotating joint (2) are fixed via threads, and a rubber ring (10) is provided between the two.

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