Wellhead watertight joint filling equipment and ship

Abstract

The invention belongs to the field of marine equipment, and particularly relates to wellhead watertight joint filling equipment and a ship. In order to facilitate entering and exiting of the lifting platform, the well mouth watertight joint filling equipment comprises a well lid and a joint filling mechanism, the joint filling mechanism comprises a rotating arm, a joint filling plate connected to one end of the rotating arm and a rotating power source fixedly installed in a lifting well, and the rotating power source is in transmission connection with the rotating arm; and a storage station located in the lifting well and a joint filling station used for enabling the joint filling plate to be located between the deck and the lifting platform are arranged in the rotating stroke of the joint filling plate, and when the joint filling plate is located at the joint filling station, the upper plate face of the joint filling plate is flush with the upper surface of the deck. The invention further provides a ship comprising the wellhead watertight joint filling equipment. When the well lid is opened, the gap between the lifting platform and the deck can be filled with the gap filling plate, and people or goods can enter and exit from the lifting platform conveniently; when the well lid is closed, the joint filling plate is hidden in the lifting well, normal closing of the well lid is not affected, and normal passing of vehicles is not affected.

Description

Technical Field

[0001] This invention belongs to the field of marine equipment, and in particular relates to a wellhead watertight sealing device and a ship. Background Technology

[0002] To facilitate the vertical transport of people or cargo, ships are equipped with lifting systems. These systems include lift shafts, lifting platforms, manhole covers, a manhole cover drive mechanism for opening or closing the lift shaft opening, and a lifting mechanism (such as a winch mechanism) for moving the lifting platform up and down. When the lifting system extends directly to the top deck, the lift shaft opening must be watertight to prevent water from entering during rain. Furthermore, after the manhole cover is closed, its upper surface should be flush with the deck surface, and the cover should have sufficient load-bearing capacity to allow vehicles to pass through.

[0003] For example, Chinese invention patent application CN111532942A, published on August 14, 2020, discloses a ship deck-embedded elevator. This elevator (equivalent to a lifting device) includes an elevator shaft (equivalent to a lift shaft), a car (equivalent to a lifting platform), a watertight cover (equivalent to a manhole cover), a hydraulic cylinder (equivalent to a manhole cover drive mechanism) for opening or closing the watertight cover, and a traveling mechanism (equivalent to a lifting mechanism) for driving the car up and down. When the watertight cover is closed, a sealing strip is pressed between the watertight cover and the sealing wedge at the manhole opening to prevent water from entering the lift shaft. Simultaneously, the upper surface of the watertight cover is flush with the upper surface of the deck to facilitate vehicle passage.

[0004] When in use, the car can be raised to be flush with the deck, but there is a large gap between the car and the deck, which is not conducive to people or goods entering and exiting the car. Summary of the Invention

[0005] The purpose of this invention is to provide a wellhead watertight sealing device to solve the technical problem that it is difficult for people or goods to enter or exit the lifting platform.

[0006] The purpose of this invention is to provide a vessel to solve the technical problem that it is difficult for people or cargo to enter or exit the lifting platform.

[0007] To achieve the above objectives, the technical solution of the wellhead watertight sealing device provided by this invention is as follows: A wellhead watertight sealing device includes a well cover and a well cover drive mechanism for driving the well cover to open or close a square wellhead. It also includes a sealing mechanism for filling the gap between the deck and the lifting platform when the well cover is open. The sealing mechanism includes a rotating arm, a sealing plate connected to one end of the rotating arm, and a rotating power source for fixed installation in the lifting well. The rotating power source is driven to the rotating arm to drive the sealing plate to rotate. The sealing plate has a storage position located in the lifting well to avoid interference with the well cover in the closed state and a sealing position for positioning the sealing plate between the deck and the lifting platform to fill the gap between the deck and the lifting platform. When the sealing plate is in the sealing position, the upper surface of the sealing plate is flush with the upper surface of the deck.

[0008] Furthermore, when the joint sealant is in the joint sealing position, the joint sealant partially overlaps the step surface at the wellhead below the upper surface of the deck to enhance the load-bearing capacity of the joint sealant.

[0009] Furthermore, when the manhole cover is in the closed state, the edge of the manhole cover is used to rest on the surface of the step to make the upper surface of the manhole cover flush with the upper surface of the deck and reduce the gap between the edge of the manhole cover and the deck.

[0010] Furthermore, multiple sealing mechanisms are respectively installed on the three sides of the square well opening, excluding the side where the well cover drive mechanism is installed, so that people or goods can enter and exit the lifting platform from the corresponding three sides where the sealing mechanism is installed.

[0011] Furthermore, the manhole cover drive mechanism is used to be set on one long side of the square manhole opening. When all the sealant plates are in the sealant position, there is a clearance between the sealant plates set on the two short sides of the square manhole opening and the sealant plates set on the long side of the square manhole opening, so as to avoid interference when all the sealant plates rotate at the same time.

[0012] Furthermore, the manhole cover drive mechanism is used to be set on one long side of the square manhole opening, and at least two sealing mechanisms are used to be set on the other long side of the square manhole opening. All sealing mechanisms set on the long side of the square manhole opening share a sealing plate to improve the load-bearing capacity of the sealing plate.

[0013] Furthermore, the lower surface of the manhole cover is provided with an installation groove, and a sealing ring is installed in the installation groove. When the manhole cover is in the closed state, the upright plate at the manhole opening, which is lower than the upper surface of the deck, is inserted into the installation groove and squeezes the sealing ring to achieve a seal between the manhole cover and the manhole opening.

[0014] Furthermore, the manhole cover drive mechanism is equipped with a first position sensor for detecting whether the manhole cover is fully open, and the sealing mechanism is equipped with a second position sensor for detecting whether the sealing plate is in the sealing position and a third position sensor for detecting whether the sealing plate is in the storage position. The wellhead watertight sealing device also includes a control module and a fourth position sensor for detecting whether the lifting platform has descended to a position below the point where it will not interfere with the sealing plate. The control module is communicatively connected to each position sensor. Before the lifting platform rises, the control module controls the sealing plate to switch to the sealing position after the first position sensor detects that the manhole cover is fully open. When the manhole cover is closed, the control module controls the sealing plate to switch to the sealing position after the fourth position sensor detects that the lifting platform has descended to the full position, and controls the manhole cover to close after the third position sensor detects that the sealing plate is in the sealing position.

[0015] Furthermore, the manhole cover drive mechanism includes a crank arm and a hydraulic cylinder. One end of the crank arm is hinged to the manhole opening, and the other end is fixedly connected to the manhole cover. One end of the hydraulic cylinder is hinged to the crank arm, and the other end is hinged to a base connected to the wall of the lifting manhole, so as to open and close the manhole cover by extending and retracting the hydraulic cylinder.

[0016] The beneficial effects of the wellhead watertight sealing device provided by the present invention are as follows: when the well cover is open, the sealing plate can fill the gap between the lifting platform and the deck, making it convenient for people or goods to enter and exit the lifting platform; when the well cover is closed, the sealing plate is hidden inside the lifting well, which does not affect the normal closing of the well cover, nor does it affect the normal passage of vehicles.

[0017] To achieve the above objectives, the technical solution for the ship provided by this invention is as follows: A vessel includes a lifting device and a control system for controlling the lifting device. The lifting device includes a lifting shaft with its opening located on the top deck, a lifting platform located within the lifting shaft, a lifting mechanism for driving the lifting platform to move up and down, and a watertight device for the opening. The watertight device includes a manhole cover and a manhole cover drive mechanism for driving the manhole cover to open or close a square manhole opening. The watertight device also includes a caulking mechanism for filling the gap between the deck and the lifting platform when the manhole cover is open. The caulking mechanism includes a rotating arm, a caulking plate connected to one end of the rotating arm, and a rotational power source for fixed installation within the lifting shaft. The rotational power source is drively connected to the rotating arm to drive the caulking plate to rotate via the rotating arm. During the rotation stroke of the caulking plate, there is a storage position located within the lifting shaft to avoid interference with the manhole cover in the closed state and a caulking position for positioning the caulking plate between the deck and the lifting platform to fill the gap between the deck and the lifting platform. When the caulking plate is in the caulking position, the upper surface of the caulking plate is flush with the upper surface of the deck.

[0018] Furthermore, when the joint sealant is in the joint sealing position, the joint sealant partially overlaps the step surface at the wellhead below the upper surface of the deck to enhance the load-bearing capacity of the joint sealant.

[0019] Furthermore, when the manhole cover is in the closed state, the edge of the manhole cover is used to rest on the surface of the step to make the upper surface of the manhole cover flush with the upper surface of the deck and reduce the gap between the edge of the manhole cover and the deck.

[0020] Furthermore, multiple sealing mechanisms are respectively installed on the three sides of the square well opening, excluding the side where the well cover drive mechanism is installed, so that people or goods can enter and exit the lifting platform from the corresponding three sides where the sealing mechanism is installed.

[0021] Furthermore, the manhole cover drive mechanism is used to be set on one long side of the square manhole opening. When all the sealant plates are in the sealant position, there is a clearance between the sealant plates set on the two short sides of the square manhole opening and the sealant plates set on the long side of the square manhole opening, so as to avoid interference when all the sealant plates rotate at the same time.

[0022] Furthermore, the manhole cover drive mechanism is used to be set on one long side of the square manhole opening, and at least two sealing mechanisms are used to be set on the other long side of the square manhole opening. All sealing mechanisms set on the long side of the square manhole opening share a sealing plate to improve the load-bearing capacity of the sealing plate.

[0023] Furthermore, the lower surface of the manhole cover is provided with an installation groove, and a sealing ring is installed in the installation groove. When the manhole cover is in the closed state, the upright plate at the manhole opening, which is lower than the upper surface of the deck, is inserted into the installation groove and squeezes the sealing ring to achieve a seal between the manhole cover and the manhole opening.

[0024] Furthermore, the manhole cover drive mechanism is equipped with a first position sensor for detecting whether the manhole cover is fully open, the sealing mechanism is equipped with a second position sensor for detecting whether the sealing plate is in the sealing position and a third position sensor for detecting whether the sealing plate is in the storage position, and the wellhead watertight device also includes a control module and a fourth position sensor for detecting whether the lifting platform has descended to a position below the point where it will not interfere with the sealing plate. The control module is communicatively connected to each position sensor. Before the lifting platform rises, the control module controls the sealing plate to switch to the sealing position after the first position sensor detects that the manhole cover is fully open. When the manhole cover is closed, the control module controls the sealing plate to switch to the sealing position after the fourth position sensor detects that the lifting platform has descended to the full position, and controls the manhole cover to close after the third position sensor detects that the sealing plate is in the sealing position.

[0025] Furthermore, the manhole cover drive mechanism includes a crank arm and a hydraulic cylinder. One end of the crank arm is hinged to the manhole opening, and the other end is fixedly connected to the manhole cover. One end of the hydraulic cylinder is hinged to the crank arm, and the other end is hinged to a base connected to the wall of the lifting manhole, so as to open and close the manhole cover by extending and retracting the hydraulic cylinder.

[0026] The beneficial effects of the ship provided by the present invention are as follows: when the manhole cover is open, the sealant can fill the gap between the lifting platform and the deck, making it easier for people or goods to enter and exit the lifting platform; when the manhole cover is closed, the sealant is hidden inside the lifting well, which does not affect the normal closing of the manhole cover, nor does it affect the normal passage of vehicles. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the manhole cover when it is closed. Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 This is a structural diagram showing the manhole cover open and the sealant plate in the sealant position. Figure 4 This is a schematic diagram of the manhole cover drive mechanism and the manhole cover. Figure 5 A schematic diagram of the structure when the sealant plates of multiple sealant mechanisms are simultaneously in the sealant filling position; Figure 6 This is a schematic diagram of the structure when the lifting platform is raised to its highest position.

[0028] Explanation of reference numerals in the attached figures: 1. Manhole cover; 2. Crank arm; 3. Hydraulic cylinder; 4. Sealing ring; 5. Opening and locking mechanism; 6. Closing and locking mechanism; 7. Overshoot buffer; 8. Opening position switch; 9. Closing position switch; 10. Lighting; 11. Sealing plate; 11-1. Short side sealing plate; 11-2. Long side sealing plate; 12. Rotating arm; 13. Hydraulic motor; 14. Sealing position switch; 15. Retracting position switch; 16. Lifting platform; 17. Step surface; 18. Deck; 19. Vertical plate; 20. Lifting shaft; 21. Ascending position sensor; 22. Descending position sensor; 23. Drainage trough. Detailed Implementation

[0029] To address the problems in the background art, the core inventive concept of this invention is as follows: when the manhole cover is open, a sealant is installed between the lifting platform and the deck to fill the gap between the lifting platform and the deck, facilitating the entry and exit of people or goods on the lifting platform; when the manhole cover is closed, the sealant is hidden inside the lifting manhole, and the upper surface of the manhole cover is flush with the upper surface of the deck, facilitating vehicle movement.

[0030] The present invention will be further described in detail below with reference to the embodiments.

[0031] Embodiments of the wellhead watertight sealing device provided by the present invention: like Figures 1-6As shown, the vessel includes a deck 18, a lift shaft 20, a lift platform 16, and a watertight sealant for the shaft opening. The square opening of the lift shaft 20 is located at the deck 18. The wellhead watertight sealing device includes a square well cover 1, a well cover drive mechanism for driving the well cover 1 to open or close the square wellhead, and a sealing mechanism for filling the gap between the deck 18 and the lifting platform 16 when the well cover 1 is open. The sealing mechanism includes a rotating arm 12, a sealing plate 11 connected to one end of the rotating arm 12, and a rotating power source for fixed installation in the lifting well 20. The rotating power source is driven to the rotating arm 12 to drive the sealing plate 11 to rotate. During the rotation stroke of the sealing plate 11, there is a storage position located in the lifting well 20 to avoid interference with the well cover 1 in the closed state, and a sealing position for placing the sealing plate 11 between the deck 18 and the lifting platform 16 to fill the gap between the deck 18 and the lifting platform 16. When the sealing plate 11 is in the sealing position, the upper surface of the sealing plate 11 is flush with the upper surface of the deck 18.

[0032] The manhole cover 1 opens upwards, preventing debris and water accumulated at the cover from entering the manhole. The manhole cover drive mechanism includes a crank arm 2 and a hydraulic cylinder 3. One end of the crank arm 2 is hinged to a crank arm base at the manhole opening, and the other end is fixedly connected to the manhole cover 1 via a flange. The crank arm base is located below the manhole deck 18. Due to the size of the manhole cover 1, there are generally two sets of crank arms 2 and hydraulic cylinders 3. One end of the hydraulic cylinder 3 is hinged to the crank arm 2, and the other end is hinged to a base fixedly connected to the wall of the lift shaft 20 (e.g., the cylinder body of the hydraulic cylinder 3 is hinged to the base, and the piston rod...). The rotating arm 12 is hinged to the crank arm 2 to open and close the manhole cover 1 by extending and retracting the hydraulic cylinder; one end of the rotating arm 12 is fixedly connected to the filler plate 11 by bolts, and the other end is connected to the output shaft of the rotating power source by a flange; the rotating power source can be a hydraulic motor 13, a servo motor, or other rotating power source. After the filler plate 11 is in place, the rotating power source stops moving to fix the position of the filler plate 11. When the filler plate 11 is in the filling position, the rotating power source fixes the filler plate 11 so that the filler plate 11 remains stationary when subjected to vehicle wheel pressure.

[0033] To ensure the watertightness of the manhole cover 1, a sealing ring 4 is pressed between the manhole cover 1 and the manhole opening when the manhole cover 1 is in the closed state. Preferably, an installation groove is provided on the lower surface of the manhole cover 1, and the sealing ring 4 is installed in the installation groove. When the manhole cover 1 is in the closed state, the upright plate 19 at the manhole opening, which is lower than the upper surface of the deck 18, is inserted into the installation groove and presses the sealing ring 4 to achieve a seal between the manhole cover 1 and the manhole opening. The upright plate 19 can be the vertical part of an "L"-shaped angle steel connected to the manhole opening. A drainage groove 23 is provided on the outside of the angle steel. When the rainwater is small, it is discharged through the drain outlet at the bottom of the drainage groove 23. When the rainwater exceeds the flow rate of the drainage groove 23, the rainwater overflows the drainage groove 23 and enters the sealed area between the angle steel and the sealing ring 4, and then is discharged through the drain hole at the manhole opening. The watertight structure of the manhole opening is a double-layer watertight structure with good watertightness.

[0034] In the initial state, the manhole cover 1 is in the closed state, and the sealant plate 11 is in the sealant position. When using the lifting platform 16 to transport goods, the specific movement sequence of each component is as follows: the manhole cover 1 moves upward and switches to the open state → the sealant plate 11 switches to the sealant position → the lifting platform 16 rises to the highest point so that the platform surface of the lifting platform 16 is flush with the upper surface of the deck 18, thereby facilitating the transport of goods → the lifting platform 16 descends → the sealant plate 11 switches to the storage position → the manhole cover 1 moves downward and switches to the closed state.

[0035] When the lifting platform 16 is at its highest point, the sealant plate 11 fills the gap between the deck 18 and the lifting platform 16 to facilitate the entry and exit of people and goods. When the manhole cover 1 is in the closed state, the upper surface of the manhole cover 1 is flush with the upper surface of the deck 18 to facilitate the movement of people and vehicles on the deck 18. The hydraulic cylinder 3 supports the manhole cover 1 so that it can withstand the wheel pressure of vehicles and the weight of people. When the sealant plate 11 is in the sealing position, on the one hand, the rotary power source no longer drives the sealant plate 11 to rotate, thereby limiting the position of the sealant plate 11. On the other hand, the deck 18 and the lifting platform 16 on both sides of the sealant plate 11 can also limit the sealant plate 11.

[0036] In this invention, the lifting platform 16 can be raised and lowered by existing lifting mechanisms such as winch mechanism and gear travel mechanism. This invention only adds two position sensors to the existing technology to detect whether the lifting platform 16 has reached a specific position, so as to determine when the sealant 11 can rotate downwards. It does not make any improvement to how the lifting platform 16 is raised and lowered.

[0037] like Figures 1-5 As shown, the manhole cover drive mechanism is equipped with an open position switch 8 (i.e., a first position sensor) for detecting whether the manhole cover 1 is fully open and a closed position switch 9 for detecting whether the manhole cover 1 is fully closed; the caulking mechanism is equipped with a caulking position switch 14 (i.e., a second position sensor) for detecting whether the caulking plate 11 is in the caulking position and a caulking position switch 15 (i.e., a third position sensor) for detecting whether the caulking plate 11 is in the caulking position; the lifting platform 16 is equipped with a rise position sensor 21 for detecting whether the lifting platform 16 has risen to the point where its platform surface is flush with the upper surface of the deck 18 and a fall position sensor 22 (i.e., a fourth position sensor) for detecting whether the lifting platform 16 has fallen to a position below the point where it will not interfere with the caulking plate 11. Each position switch can be a limit switch, and each position sensor can be a photoelectric sensor. Of course, each position switch and each position sensor can also be replaced with various position sensors used for detecting position in the prior art.

[0038] The open position switch 8 is installed at the wellhead. During the opening of the well cover 1, when the crank arm 2 triggers the trigger rod of the open position switch 8 to the correct position, the control module receives a signal and controls the well cover 1 to stop moving (specifically, controls the hydraulic cylinder 3 to stop moving). The closed position switch 9 is installed on the crank arm base. During the closing of the well cover 1, when the crank arm 2 triggers the trigger rod of the closed position switch 9 to the correct position, the control module receives a signal and controls the well cover 1 to stop moving (specifically, controls the hydraulic cylinder 3 to stop moving). Similarly, the filler position switch 14 and the retractable position switch 15 are installed at corresponding positions inside the lifting well 20, and transmit signals to the control module when the crank arm 2 triggers the trigger rod of the corresponding switch to the correct position, so that the control module controls the filler plate 11 to stop moving (specifically, controls the hydraulic motor 13 to stop moving). Meanwhile, the rising position sensor 21 and the falling position sensor 22 are respectively installed at corresponding positions in the lifting shaft 20, and are used to transmit signals to the control module after the lifting platform 16 rises or falls to the correct position, so that the control module controls the lifting platform 16 to stop moving after the lifting platform 16 rises to the correct position, and controls the sealing mechanism to start moving after the lifting platform 16 falls to the correct position.

[0039] By setting up position sensors, the control module can automatically control each component to move in the specific motion sequence described above, achieving a high degree of automation. The control module can communicate with each position sensor via cables, 2.4G networks, Wi-Fi, etc., and can be a PLC automatic control module.

[0040] When a vehicle enters or exits the lifting platform 16, the sealant plate 11 bears the wheel pressure of the vehicle, and the rotating arm 12 supports the sealant plate 11. In a preferred embodiment, to improve the pressure-bearing capacity of the sealant plate 11, such as... Figure 2 , Figure 5 and Figure 6 As shown, when the sealant plate 11 is in the sealing position, the sealant plate 11 partially overlaps the step surface 17, which is located below the upper surface of the deck 18, to enhance the load-bearing capacity of the sealant plate 11 and enable it to withstand greater wheel pressure. The sealant plate 11 can directly overlap the step surface 17, or a support block can be connected to the lower surface of the sealant plate 11, with the support block directly overlapping the step surface 17, allowing the sealant plate 11 to indirectly overlap the step surface 17 via the support block.

[0041] Based on the above embodiments, due to the additional step surface 17, a gap will exist between the manhole cover 1 and the deck 18 when the manhole cover 1 is closed. To reduce this gap, in a preferred embodiment, such as... Figure 2As shown, when the manhole cover 1 is in the closed state, the edge of the manhole cover 1 is used to rest on the step surface 17 to reduce the gap between the edge of the manhole cover 1 and the deck 18 with the highest upper surface, facilitating vehicle traffic. At the same time, the edge of the manhole cover 1 resting on the step surface can also improve the load-bearing capacity of the manhole cover 1.

[0042] In this invention, the manhole cover drive mechanism is installed on one long side of a square manhole opening. Except for the side where the manhole cover drive mechanism is installed, which is interfered with by the manhole cover 1, the other three sides can be used for goods to enter and exit. In a preferred embodiment, multiple sealing mechanisms are respectively installed on the other three sides of the square manhole opening, excluding the side where the manhole cover drive mechanism is installed, so that people or goods can enter and exit the lifting platform 16 from the corresponding three sides with sealing mechanisms.

[0043] Preferably, when all the sealant plates 11 are in the sealant position, there is a clearance between the sealant plates 11 located on the two short sides of the square well opening and the sealant plates 11 located on the long side of the square well opening. This clearance is to prevent interference when the sealant plates 11 rotate, allowing them to rotate downwards synchronously. If there is no clearance, the sealant plates 11 located on the long side must rotate downwards first to make room for the sealant plates 11 located on the short sides to rotate.

[0044] Among them, such as Figure 6 As shown, the short-side sealant plate 11-1, located on the short side, has the same length as the width of the lifting platform 16, while the long-side sealant plate 11-2, located on the long side, has a shorter length than the lifting platform 16, thus forming the aforementioned clearance gap. Because the long-side sealant plate 11-2 is relatively long, at least two sealing mechanisms are provided, and all sealing mechanisms located on the long side of the square wellhead share one long-side sealant plate 11-2 to enhance its load-bearing capacity.

[0045] Of course, in other embodiments, the caulking mechanism may be provided only on one or both sides.

[0046] The following section will cover topics not mentioned above.

[0047] In this invention, an over-rush buffer 7 can also be installed at the wellhead above the crank arm 2. When the well cover 1 is opened, if the well cover 1 accidentally exceeds the maximum opening position and does not stop, the over-rush buffer 7 can block the well cover 1 to prevent the well cover 1 from continuing to open, thus playing the role of over-rush limit and preventing the well cover 1 from being opened too much, which would cause the crank arm 2 to have a rigid collision with the wellhead structure.

[0048] In this invention, a lighting lamp 10 can also be installed on the inner surface of the manhole cover 1. During nighttime operations, the lighting lamp 10 is turned on to provide illumination. The cable conduit of the lighting lamp 10 is led from the inner surface of the manhole cover 1 to the crank arm 2, so that the lighting lamp 10 and its cable conduit can rotate together with the manhole cover 1.

[0049] In this invention, a closing and locking mechanism 6 can also be installed on the lower surface of the manhole cover 1. The closing and locking mechanism 6 can be an automatic twist lock. After the manhole cover 1 is closed in place, the locking head of the closing and locking mechanism 6 rotates out to the lower surface of the manhole structure to prevent the manhole cover 1 from shaking. At the same time, it can also provide a certain compressive force for the vertical plate 19 to compress the sealing ring 4, thereby improving the watertight effect. Before the manhole cover 1 is opened, the locking head rotates back so that the manhole cover 1 can be opened normally.

[0050] In this invention, an opening and locking mechanism 5 can also be installed on the base outside the crank arm 2. After the manhole cover 1 is opened to the position, the lock hole on the crank arm 2 is aligned with the locking pin of the opening and locking mechanism 5. The locking pin of the opening and locking mechanism 5 extends into the lock hole to lock the open state of the manhole cover 1 and prevent the manhole cover 1 from being closed accidentally.

[0051] Embodiments of the ship provided by this invention: A vessel includes a lifting device and a control system for controlling the lifting device. The lifting device includes a lifting well with its opening located on the top deck, a lifting platform located within the lifting well, a lifting mechanism for driving the lifting platform to move up and down, and a wellhead watertight sealant installed at the wellhead. The wellhead watertight sealant can be any of the embodiments of the wellhead watertight sealant of the present invention, and will not be described in detail here.

[0052] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features, or organically combine different embodiments to create the embodiments shown in the accompanying drawings. Of course, those skilled in the art can also create other embodiments not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wellhead watertight sealing device, comprising a well cover and a well cover driving mechanism for driving the well cover to open or close a square wellhead, characterized in that, It also includes a caulking mechanism for filling the gap between the deck and the lifting platform when the manhole cover is open. The caulking mechanism includes a rotating arm, a caulking plate connected to one end of the rotating arm, and a rotating power source for fixed installation in the lifting shaft. The rotating power source is drivenly connected to the rotating arm to drive the caulking plate to rotate. The caulking plate has a storage position located in the lifting shaft to avoid interference with the manhole cover in the closed state and a caulking position for positioning the caulking plate between the deck and the lifting platform to fill the gap between the deck and the lifting platform. When the caulking plate is in the caulking position, the upper surface of the caulking plate is flush with the upper surface of the deck.

2. The wellhead watertight sealing device as described in claim 1, characterized in that, When the joint sealant is in the joint sealing position, the joint sealant partially overlaps the step surface at the wellhead that is lower than the upper surface of the deck, in order to improve the load-bearing capacity of the joint sealant.

3. The wellhead watertight sealing device as described in claim 2, characterized in that, When the manhole cover is closed, the edge of the manhole cover is used to rest on the surface of the step to make the upper surface of the manhole cover flush with the upper surface of the deck and to reduce the gap between the edge of the manhole cover and the deck.

4. The wellhead watertight sealing device as described in any one of claims 1 to 3, characterized in that, Multiple sealing mechanisms are installed on the three sides of the square well opening, excluding the side with the well cover drive mechanism, so that people or goods can enter and exit the lifting platform from the corresponding three sides with sealing mechanisms.

5. The wellhead watertight sealing device as described in claim 4, characterized in that, The manhole cover drive mechanism is used to be set on one long side of the square manhole opening. When all the sealant plates are in the sealant position, there is a clearance between the sealant plates set on the two short sides of the square manhole opening and the sealant plates set on the long side of the square manhole opening, so as to avoid interference when all the sealant plates rotate at the same time.

6. The wellhead watertight sealing device as described in any one of claims 1 to 3, characterized in that, The manhole cover drive mechanism is used to be installed on one long side of the square manhole opening, and at least two sealing mechanisms are used to be installed on the other long side of the square manhole opening. All sealing mechanisms installed on the long side of the square manhole opening share a sealing plate to improve the load-bearing capacity of the sealing plate.

7. The wellhead watertight sealing device as described in any one of claims 1 to 3, characterized in that, The lower surface of the manhole cover is provided with an installation groove, and a sealing ring is installed in the installation groove. When the manhole cover is in the closed state, the upright plate at the manhole opening, which is lower than the upper surface of the deck, is inserted into the installation groove and squeezes the sealing ring to achieve a seal between the manhole cover and the manhole opening.

8. The wellhead watertight sealing device as described in any one of claims 1 to 3, characterized in that, The manhole cover drive mechanism is equipped with a first position sensor to detect whether the manhole cover is fully open. The sealing mechanism is equipped with a second position sensor to detect whether the sealing plate is in the sealing position and a third position sensor to detect whether the sealing plate is in the storage position. The wellhead watertight sealing equipment also includes a control module and a fourth position sensor to detect whether the lifting platform has descended to a position below the point where it will not interfere with the sealing plate. The control module is communicatively connected to each position sensor. Before the lifting platform rises, the control module controls the sealing plate to switch to the sealing position after the first position sensor detects that the manhole cover is fully open. When the manhole cover is closed, the control module controls the sealing plate to switch to the sealing position after the fourth position sensor detects that the lifting platform has descended to the full position, and controls the manhole cover to close after the third position sensor detects that the sealing plate is in the sealing position.

9. The wellhead watertight sealing device as described in any one of claims 1 to 3, characterized in that, The manhole cover drive mechanism includes a crank arm and a hydraulic cylinder. One end of the crank arm is hinged to the manhole opening, and the other end is fixedly connected to the manhole cover. One end of the hydraulic cylinder is hinged to the crank arm, and the other end is hinged to a base connected to the wall of the lifting manhole, so as to open and close the manhole cover by extending and retracting the hydraulic cylinder.

10. A vessel, comprising a lifting device and a control system for controlling the lifting device, the lifting device comprising a lifting shaft with its opening located on the top deck, a lifting platform located within the lifting shaft, a lifting mechanism for driving the lifting platform to move up and down, and a watertight device for the shaft opening, characterized in that, The wellhead watertight device is the wellhead watertight sealant device as described in any one of claims 1 to 9.

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