Quick locking device of underwater Christmas tree valve

Abstract

The utility model discloses a rapid locking device of an underwater Christmas tree valve, which comprises a locking sleeve, the rear end of the locking sleeve is connected with a torsion insertion cavity, the outer side wall of the torsion insertion cavity is provided with a state display panel, and a state display gap is formed between the state display panel and the outer side wall of the torsion insertion cavity. An unlocking notch and a locking notch are sequentially formed in the state display panel from front to back, a fixed outer sleeve is arranged in the middle of the locking sleeve in a sleeving mode, the locking sleeve and the fixed outer sleeve can relatively move from front to back, and a position indicating rod is fixed to the outer side wall, close to the rear end, of the fixed outer sleeve. The position indicating rod extends backwards and extends into the state display gap, a state display strip is arranged on the position indicating rod, when the locking sleeve and the fixed outer sleeve move relatively, the unlocking state or the locking state of the locking sleeve can be displayed, recognition of an ROV mechanical arm can be facilitated, and therefore the locking device is effectively controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep-sea oil production, and in particular relates to a quick locking device for an underwater oil production tree valve. Background Art

[0002] The Christmas tree, also known as the Christmas tree, is a wellhead control device used when testing oil and gas after the completion of an oil (gas) well, or when producing oil in a self-flowing well or a machine-produced well. It consists of a tubing hanger and many gates and tees or crosses, and is directly installed on the casing head. A Christmas tree with an oil outlet pipe on only one side is called a single-wing Christmas tree; a Christmas tree with oil outlet pipes on both sides is called a double-wing Christmas tree. The Christmas tree is equipped with an oil nozzle (choke nozzle), and the production of oil and gas is controlled by replacing the oil nozzles with different inner diameters. The oil and gas produced on the seabed can be transported out through the Christmas tree, but the environment in the deep sea is very different from that on land. The staff cannot adapt to the various complex environments on the seabed to control the valves on the Christmas tree, and generally use underwater robots (ROVs) to control them.

[0003] Most traditional locking devices directly use thread locking, but the complex seabed conditions can easily lead to thread damage or thread jamming, thereby causing damage to the underwater connection device. Therefore, a double-layer locking device combining an internal elastic claw and an external locking sleeve is proposed to promote a firm connection between the locking device and the valve on the oil tree. At the same time, a working status display of the device is provided to facilitate identification by an underwater robot, thereby effectively controlling the device. Summary of the invention

[0004] In order to solve the above technical problems, the utility model provides a quick locking device for an underwater Christmas tree valve which is easy for an underwater robot to identify.

[0005] The technical scheme is as follows: A quick locking device for an underwater oil tree valve comprises a locking sleeve, the rear end of the locking sleeve is connected to a torque plug cavity, a status display panel is arranged on the outer wall of the torque plug cavity, a status display gap is formed between the status display panel and the outer wall of the torque plug cavity, an unlocking notch and a locking notch are sequentially opened on the status display panel, a fixed outer sleeve is sleeved on the middle part of the locking sleeve, the locking sleeve and the fixed outer sleeve can move forward and backward relative to each other, a position indicating rod is fixed on the outer wall of the fixed outer sleeve near the rear end, the position indicating rod extends backward and extends into the status display gap, a status display bar is arranged on the position indicating rod, and when the locking sleeve and the fixed outer sleeve move relative to each other, the unlocking or locking state of the locking sleeve can be displayed. With the above structure, relative movement between the status display panel and the position indicating rod can be achieved, indicating that the locking device is in an unlocked or locked state, which is convenient for underwater robots to identify, thereby effectively controlling the locking device.

[0006] As a preference, the locking sleeve comprises a connecting flange sleeve and a pressing sleeve, the connecting flange sleeve is fixedly docked at the rear end of the pressing sleeve, and the torque plug cavity is fixed at the rear end of the connecting flange sleeve;

[0007] An elastic claw, a drive shaft and a torsion bar are sequentially installed in the locking sleeve from front to back, the front end of the elastic claw is close to the front end of the locking sleeve, the rear end of the elastic claw is connected to the front end of the drive shaft, the front part of the torsion bar is threadedly connected to the rear part of the drive shaft, the rear end of the torsion bar extends into the torque plug cavity, a strip hole is opened on the side wall of the pressing sleeve along the front-to-back direction, and the drive shaft is connected to the fixed outer sleeve via a fixing rod passing through the strip hole;

[0008] The torsion bar is located inside the connecting flange tube, and the front end and the rear end of the outer wall of the torsion bar are both provided with limiting steps, and the inner wall of the connecting flange tube is provided with a connecting step corresponding to the front end limiting step, and the front end limiting step is fixed correspondingly to the connecting step, and the torsion bar is provided with a connecting notch near the front end limiting step, and the front end of the torsion plug cavity is clamped with the rear end limiting step;

[0009] The driving shaft is located inside the pressing sleeve, the rear end of the driving shaft extends into the connecting notch, the middle part of the driving shaft is set as a protruding fixing platform with a radius larger than that of the two ends, and the fixing platform abuts against the corresponding position of the inner side wall of the pressing sleeve;

[0010] The front end of the driving shaft is provided with a circle of annular grooves, and the rear part of the elastic claw is clamped in the annular groove. With the above structure, the internal torsion bar and the driving shaft are pressed against the external locking sleeve, so that the torque plug cavity and the locking sleeve can move forward. The elastic claw is first fixed to the corresponding part of the Christmas tree valve, and then the pressing sleeve is pushed forward to achieve further locking. The external fixed outer sleeve is connected to the driving rod through the fixed rod, which ensures that the fixed outer sleeve remains stationary during the forward movement of the locking sleeve, thereby ensuring the relative movement between the position indicating rod and the status display panel, which is convenient for the underwater robot to identify its status, thereby effectively controlling the locking device.

[0011] Preferably, a quick-insert plate, a connecting plate and a lifting plate are sequentially arranged on the outer wall of the locking sleeve from front to back;

[0012] The quick-insert disc is sleeved on the front end of the locking sleeve, the connecting plate is sleeved on the outside of the fixed outer sleeve, the lifting plate is fixed to the upper half of the torque plug cavity by screws, the lifting plate is located above the connecting flange cylinder, and a through hole is provided on the lifting plate for the position indicator rod to pass through. With the above structure, the externally arranged lifting plate, connecting plate and quick-insert disc can move forward with the torque plug cavity, and the through hole provided on the lifting plate can realize the display of the position status, so as to facilitate the recognition of the underwater robot.

[0013] Preferably, a connecting rod is arranged above the through hole, and the other end of the connecting rod is fixed to the connecting plate. A telescopic shaft is connected between the connecting plate and the quick-insertion disk. The telescopic shaft is arranged opposite to the outer wall of the fixed outer sleeve. A reciprocating rod is arranged in the inner chamber of the telescopic shaft. The reciprocating rod passes through the quick-insertion disk and the connecting plate from front to back in sequence. A compression spring is also arranged in the inner chamber of the telescopic shaft. With the above structure, a connecting mechanism is arranged between the lifting plate and the connecting plate, and between the connecting plate and the quick-insertion disk. During the forward movement, the lifting plate can push the connecting plate and the quick-insertion disk forward together to achieve connection with the corresponding part of the valve on the Christmas tree, and a compression spring is arranged in the telescopic shaft to play a buffering role.

[0014] As a preferred embodiment: the quick-insert disk is in the shape of a hollow disk, a fixed step is provided near the middle of the quick-insert disk, and is clamped with the outer wall of the locking sleeve, and a plurality of female joints are provided along the circumference of the quick-insert disk, and a guide pin is provided on the outer side of one of the female joints. With the above structure, the quick-insert disk and the locking sleeve can be moved forward or backward together when they are pressed against each other, and the guide pin plays a role of guiding and positioning, and the female joint on the quick-insert disk can be connected to the male joint on the valve of the oil production tree, which can ensure that the connection between the two is tight and does not fall off easily.

[0015] Preferably, a fixing plate is provided on the outer side of the locking sleeve, the fixing plate is fixed to the side of the quick-insertion plate close to the connecting plate by screws, and the fixing plate is provided with a fixing opening corresponding to the base of the telescopic shaft. With the above structure, the fixing plate can limit the position movement of the telescopic shaft, ensuring that the quick-insertion plate can move forward under the action of the telescopic shaft to connect with the valve on the Christmas tree.

[0016] Preferably, grooves are provided on both sides of the drive shaft fixing platform, and mounting blocks are provided in the two grooves. The mounting blocks are fixed to the drive shaft by screws, and the fixing rod passes through the strip hole of the pressing sleeve and the mounting block in sequence and extends into the drive shaft, and the fixing rod is located at the front side of the strip hole. With the above structure, the fixed outer sleeve is fixed to the locking device by the fixing rod to ensure stillness during the locking process, thereby causing relative movement with the position display plate to realize the status display of the device, and the strip hole can only move the pressing sleeve forward and backward but not rotate, and the fixing rod is located at the front side of the strip hole so that the pressing sleeve can move forward during the locking process.

[0017] Preferably, the front end of the pressing sleeve is a locking end, the radius of the locking end is smaller than the radius of the rear end of the pressing sleeve, and a gap is left between the outer locking end and the inner elastic claw. With the above structure, the elastic claw and the locking end cooperate with each other to achieve double fixation of the corresponding parts of the valve.

[0018] Preferably, an ROV panel is provided at the upper rear end of the torque plug cavity, and a flying wire frame is provided at the lower rear end of the torque plug cavity. With the above structure, the ROV panel can provide effective information for the ROV, and the flying wire frame facilitates the collection of various data lines of the locking device.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the locking device is provided with a notch for displaying the locking and unlocking positions, which can facilitate the identification of the ROV manipulator, thereby effectively controlling the locking device. The ROV can push the locking sleeve forward by controlling the locking device, thereby realizing double locking of the elastic claw and the locking end, and then push the quick-disc forward to dock with the corresponding part of the valve on the Christmas tree, thereby realizing further fixation, ensuring long-term and reliable connectivity of the pipeline on the seabed, and is suitable for seabed environments, especially deep sea environments where divers are not easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 for Figure 1 A top view of

[0022] Figure 3 for Figure 1 A front view of

[0023] Figure 4 for Figure 2 Sectional view of AA in the middle;

[0024] Figure 5 for Figure 3 A cross-sectional view of BB in FIG.

[0025] Figure 6 It is a schematic diagram of the internal structure of the locking sleeve 1;

[0026] Figure 7 for Figure 7 A cross-sectional view of DD in FIG.

[0027] Figure 8 It is a schematic diagram of the structure of the utility model when in use;

[0028] Fig. 9 for Figure 8 A top view of

[0029] Fig.10 for Fig. 9 Cross-sectional view of CC in . DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with embodiments and drawings.

[0031] like Figures 1 to 5 As shown, a quick locking device for an underwater oil tree valve comprises a locking sleeve 1, a rear end of the locking sleeve 1 is connected to a torque plug cavity 2, an outer side wall of the torque plug cavity 2 is provided with a status display panel 201, a status display gap is formed between the status display panel 201 and the outer side wall of the torque plug cavity 2, an unlocking notch and a locking notch are sequentially provided on the status display panel 201, a fixed outer sleeve 3 is sleeved on the middle part of the locking sleeve 1, the locking sleeve 1 and the fixed outer sleeve 3 can move forward and backward relative to each other, a position indicating rod 301 is fixed on the outer side wall of the fixed outer sleeve 3 near the rear end, the position indicating rod 301 extends backward and extends into the status display gap, a status display bar is provided on the position indicating rod 301, when the locking sleeve 1 and the fixed outer sleeve 3 move relative to each other, the unlocking or locking state of the locking sleeve 1 can be displayed, which is convenient for the underwater robot ROV to identify, thereby effectively controlling the locking device.

[0032] The locking sleeve 1 comprises a connecting flange sleeve 4 and a pressing sleeve 5, wherein the connecting flange sleeve 4 is fixedly docked at the rear end of the pressing sleeve 5, and the torque plug cavity 2 is fixed at the rear end of the connecting flange sleeve 4;

[0033] An elastic claw 8, a drive shaft 7 and a torsion bar 6 are sequentially installed in the locking sleeve 1 from front to back, the front end of the elastic claw 8 is close to the front end of the locking sleeve 1, the rear end of the elastic claw 8 is connected to the front end of the drive shaft 7, the front part of the torsion bar 6 is threadedly connected to the rear part of the drive shaft 7, the rear end of the torsion bar 6 extends into the torque plug cavity 2, a strip hole 501 is opened on the side wall of the pressing sleeve 5 along the front-to-back direction, and the drive shaft 7 is connected to the fixed outer sleeve 3 via a fixing rod 502 passing through the strip hole 501;

[0034] The torsion bar 6 is located inside the connecting flange cylinder 4. The front end and the rear end of the outer wall of the torsion bar 6 are both provided with limiting steps 602. The inner wall of the connecting flange cylinder 4 is provided with a connecting step 401 corresponding to the front end limiting step 6021. The front end limiting step 6021 is fixed correspondingly to the connecting step 401. The torsion bar 6 is provided with a connecting notch 601 near the front end limiting step 6021. An anti-wear sleeve is provided at the rear end limiting step 6022, so that the front end of the torsion plug cavity 2 is engaged with the rear end limiting step 6022.

[0035] The driving shaft 7 is located inside the pressing sleeve 5, and the rear end of the driving shaft 7 extends into the connecting notch 601. The middle part of the driving shaft 7 is provided with a protruding fixing platform 701 with a radius larger than that of the two ends, and the fixing platform 701 abuts against the corresponding position of the inner side wall of the pressing sleeve 5;

[0036] The front end of the driving shaft 7 is provided with an annular groove, and the rear portion of the elastic claw 8 is clamped in the annular groove.

[0037] The front end of the pressing sleeve 5 is a locking end 503, the radius of which is smaller than the radius of the rear end of the pressing sleeve 5, and a gap is left between the locking end 503 and the elastic claw 8. Twisting the torsion bar 6 in the torque plug cavity 2 can realize the forward movement of the torque plug cavity 2, thereby pushing the connecting flange cylinder 4 forward, further pushing the pressing sleeve 5 forward, so that the elastic claw 8 can grasp the corresponding part of the valve on the oil production tree, and the pressing sleeve 3 can be further locked.

[0038] A lifting plate 9, a connecting plate 10 and a quick-insertion disk 11 are arranged on the outer wall of the locking sleeve 1 in sequence from back to front; the connecting plate 10 is sleeved on the outer side of the fixed outer sleeve 3, and the quick-insertion disk 11 is movably sleeved on the front end of the locking sleeve 1; the lifting plate 9 is fixed to the upper half of the torque plug cavity 2 by screws, and the lifting plate 9 is located above the connecting flange tube 4. A through hole 901 is opened on the lifting plate 9 to allow the position indicating rod 301 to pass through, so that it extends into the status display gap and completes the status display together with the position display plate 201.

[0039] A connecting rod 12 is arranged above the through hole 901, and the other end of the connecting rod 12 is fixed to the connecting plate 10. A telescopic shaft 13 is connected between the connecting plate 10 and the quick-insertion disk 11. The telescopic shaft 13 is arranged on the outer side wall of the fixed outer sleeve 3. A reciprocating rod 1301 is arranged in the inner chamber of the telescopic shaft 13. The reciprocating rod 1301 passes through the quick-insertion disk 11 and the connecting plate 10 from front to back in sequence. A compression spring is also arranged in the inner cavity of the telescopic shaft 13, which can push the lifting plate 9, the connecting plate 10 and the quick-insertion disk 11 forward in sequence, so as to be connected with the corresponding parts of the valve on the oil production tree.

[0040] The quick-disc 11 is in the shape of a hollow disk. A fixed step is provided near the middle of the quick-disc 11, which is clamped with the outer wall of the locking sleeve 1. A plurality of female connectors 1101 are provided along the circumferential direction on the quick-disc 11. A guide pin 1102 is provided on the outer side of one of the female connectors 1101. When the quick-disc 11 is connected to the corresponding part of the valve on the Christmas tree, the guide pin 1102 is first aligned with the position for positioning, thereby achieving connection with the valve on the Christmas tree.

[0041] A fixing plate 14 is also provided on the outside of the locking sleeve 1. The fixing plate 14 is fixed to the side of the quick-insertion disk 11 close to the connecting plate 10 by screws. The fixing plate 14 is provided with a fixing opening corresponding to the base of the telescopic shaft 13. A mounting groove 302 is provided on the outer side wall of the fixed outer sleeve 3 corresponding to the telescopic shaft 13. The telescopic shaft 13 is located in the mounting groove 302. The fixing opening and the mounting groove 302 can ensure that the telescopic shaft 13 will not be out of position during operation, thereby ensuring that it can work normally.

[0042] An ROV panel 202 is provided at the upper rear end of the torque plug cavity 2, which can facilitate the ROV to identify effective information. A flying wire frame 203 is provided at the lower rear end of the torque plug cavity 2, which can accommodate various data cables of the locking device and play a protective role at the same time to prevent underwater organisms from damaging the data cables, thereby causing the locking device to fail to operate normally.

[0043] like Figure 6 to Figure 7As shown, grooves are provided on both sides of the fixed platform 701 of the driving shaft 7, and the pressing sleeve 5 is arranged corresponding to the grooves. Mounting blocks 702 are arranged in the two grooves, and the mounting blocks 702 are fixed to the driving shaft 7 by screws. The fixing rod 502 passes through the strip hole 501 and the mounting block 702 of the pressing sleeve 5 in sequence, and extends into the driving shaft 7. The fixing rod 502 is located at the front side of the strip hole 501, which enables the pressing sleeve 5 to move forward but not rotate, thereby realizing the status display of the locking device, and a protective cap 504 is arranged outside the fixing rod 502, and the protective cap 504 is located outside the fixed outer sleeve 3.

[0044] like Figures 8 to 10 As shown, the Christmas tree valve is provided with a fixed structure 15 corresponding to the locking device, the interior of the fixed structure 15 is hollow, and a receiving disk 1501 is provided on the outside of the fixed structure 15 corresponding to the quick-insertion disk 11, and a male connector 1502 and a guide pinhole 1503 are provided on the receiving disk 1501, so that the quick-insertion disk 11 of the locking device can be firmly connected to the receiving disk, and a stepped boss is provided at the front end of the fixed structure 15, so that the locking sleeve 1 can extend into the interior of the fixed structure 15, and the elastic claw 8 can clamp the boss at the front end of the fixed structure 15, and the pressing sleeve 5 outside the elastic claw 8 can be further clamped as it moves forward.

[0045] Working principle of the locking device: the locking device is initially aligned with the fixed structure 15 on the oil production tree valve, and the torsion rod 6 extending out of the torque plug cavity 2 pushes the torque plug cavity 2, the locking sleeve 1 and the lifting plate 9, the connecting plate 10 and the quick-disc 11 outside the locking sleeve 1 to move forward, so that the elastic claw 8 inside the locking sleeve 1 clamps the stepped boss of the fixed structure 15 on the oil production tree valve. After clamping, the torsion rod 6 is continuously twisted and continuously moved forward, pushing the pressing sleeve 5 outside the elastic claw 8 to move forward, and the lifting plate 9, the connecting plate 10 and the quick-disc outside the pressing sleeve 5 move forward together with the pressing sleeve 5, so that the pressing sleeve 5 further clamps the fixed structure 15, and the external quick-disc 11 is correspondingly connected and fixed with the male connector 1502 and the guide pinhole 1503 on the receiving disk 1501 of the fixed structure 15, thereby achieving locking.

[0046] During the forward movement, the fixed outer sleeve 3 and the position indicator rod 301 remain fixed, and the status display panel 201 on the rear end torque plug cavity 2 moves forward with the torque plug cavity 2, so that the two move relative to each other, thereby realizing the display of the position status, and the forward movement process changes from the unlocked state to the locked state. If unlocking is required, move backward and exit the fixed structure 15 in sequence to achieve unlocking. The deep-sea environment is complex, and divers cannot stay underwater for a long time and cannot respond to emergencies. Therefore, most seabed equipment uses ROV, and the position display panel 201 and ROV panel 202 set on the locking device are convenient for the identification of the ROV manipulator, so that the locking device can be effectively controlled.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A quick locking device for an underwater Christmas tree valve, characterized in that: The invention comprises a locking sleeve (1), the rear end of which is connected to a torque plug cavity (2), a state display panel (201) being arranged on the outer wall of the torque plug cavity (2), a state display gap being formed between the state display panel (201) and the outer wall of the torque plug cavity (2), an unlocking notch and a locking notch being sequentially arranged on the state display panel (201) at the front and rear, a fixed outer sleeve (3) being sleeved on the middle part of the locking sleeve (1), the locking sleeve (1) and the fixed outer sleeve (3) being able to move forward and backward relative to each other, a position indicating rod (301) being fixed on the outer wall of the fixed outer sleeve (3) near the rear end, the position indicating rod (301) extending backward and extending into the state display gap, a state display bar being arranged on the position indicating rod (301), and when the locking sleeve (1) and the fixed outer sleeve (3) are relatively moved, the unlocking or locking state of the locking sleeve (1) can be displayed.

2. A quick locking device for a valve of an underwater oil tree according to claim 1, characterized in that: The locking sleeve (1) comprises a connecting flange sleeve (4) and a pressing sleeve (5), the connecting flange sleeve (4) is fixedly docked at the rear end of the pressing sleeve (5), and the torque plug cavity (2) is fixed at the rear end of the connecting flange sleeve (4); An elastic claw (8), a drive shaft (7) and a torsion bar (6) are installed in the locking sleeve (1) from front to back in sequence, the front end of the elastic claw (8) is close to the front end of the locking sleeve (1), the rear end of the elastic claw (8) is connected to the front end of the drive shaft (7), the front part of the torsion bar (6) is threadedly connected to the rear part of the drive shaft (7), the rear end of the torsion bar (6) extends into the torque plug cavity (2), a strip hole (501) is opened on the side wall of the pressing sleeve (5) along the front-to-back direction, and the drive shaft (7) is connected to the fixed outer sleeve (3) via a fixed rod (502) passing through the strip hole (501); The torsion rod (6) is located inside the connecting flange cylinder (4), and the front end and rear end of the outer wall of the torsion rod (6) are both provided with limiting steps (602), and the front end inner wall of the connecting flange cylinder (4) is provided with a connecting step (401) corresponding to the front end limiting step (6021), and the front end limiting step (6021) is fixed to the connecting step (401) in correspondence, and the torsion rod (6) is provided with a connecting notch (601) near the front end limiting step (6021), and the front end of the torsion plug cavity (2) is engaged with the rear end limiting step (6022); The driving shaft (7) is located inside the pressing sleeve (5), and the rear end of the driving shaft (7) extends into the connecting notch (601). The middle part of the driving shaft (7) is provided with a protruding fixing platform (701) with a radius larger than that of the two ends, and the fixing platform (701) abuts against a corresponding position of the inner side wall of the pressing sleeve (5); The front end of the driving shaft (7) is provided with an annular groove, and the rear portion of the elastic claw (8) is clamped in the annular groove.

3. A quick locking device for a valve of an underwater oil tree according to claim 2, characterized in that: A quick-insertion plate (11), a connecting plate (10) and a lifting plate (9) are arranged on the outer wall of the locking sleeve (1) in sequence from front to back; The quick-insertion disk (11) is movably mounted on the front end of the locking sleeve (1), the connecting plate (10) is sleeved on the outside of the fixed outer sleeve (3), the lifting plate (9) is fixed to the upper half of the torque plug cavity (2) by screws, the lifting plate (9) is located above the connecting flange cylinder (4), and a through hole (901) is provided on the lifting plate (9) for allowing the position indicating rod (301) to pass through.

4. A quick locking device for a valve of an underwater oil tree according to claim 3, characterized in that: A connecting rod (12) is arranged above the through hole (901), the other end of the connecting rod (12) is fixed to the connecting plate (10), a telescopic shaft (13) is connected between the connecting plate (10) and the quick-insertion disk (11), the telescopic shaft (13) is arranged on the outer side wall of the fixed outer sleeve (3), a reciprocating rod (1301) is arranged in the inner chamber of the telescopic shaft (13), the reciprocating rod (1301) passes through the quick-insertion disk (11) and the connecting plate (10) from front to back in sequence, and a compression spring is also arranged in the inner chamber of the telescopic shaft (13).

5. A quick locking device for a valve of an underwater oil tree according to claim 3 or 4, characterized in that: The quick-connect disk (11) is in the shape of a hollow disk. A fixed step is provided near the middle of the quick-connect disk (11) and is clamped to the outer wall of the locking sleeve (1). A plurality of female connectors (1101) are provided along the circumference of the quick-connect disk (11), and a guide pin (1102) is provided on the outer side of one of the female connectors (1101).

6. The quick locking device for a valve of an underwater oil tree according to claim 4, characterized in that: A fixing plate (14) is also provided on the outside of the locking sleeve (1), and the fixing plate (14) is fixed to a side of the quick-insertion disk (11) close to the connecting plate (10) by means of screws, and the fixing plate (14) is provided with a fixing opening corresponding to the base of the telescopic shaft (13).

7. The quick locking device for a valve of an underwater oil tree according to claim 2, characterized in that: Grooves are provided on both sides of the fixing platform (701) of the driving shaft (7), and mounting blocks (702) are provided in the two grooves. The mounting blocks (702) are fixed to the driving shaft (7) by screws. The fixing rod (502) passes through the strip hole (501) of the pressing sleeve (5) and the mounting block (702) in sequence and extends into the driving shaft (7). The fixing rod (502) is located in front of the strip hole (501).

8. The quick locking device for a valve of an underwater oil tree according to claim 2, characterized in that: The front end of the pressing sleeve (5) is a locking end (503), the radius of the locking end (503) is smaller than the radius of the rear end of the pressing sleeve (5), and a gap is left between the locking end (503) on the outside and the elastic claw (8) on the inside.

9. The quick locking device for a valve of an underwater oil tree according to claim 1, characterized in that: An ROV panel (202) is arranged at the upper part of the rear end of the torque plug cavity (2), and a flying wire frame (203) is arranged at the lower part of the rear end of the torque plug cavity (2).

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