Liquefied natural gas offloading arm swivel joint servicing device

Abstract

The utility model discloses a liquefied natural gas unloading arm swivel joint maintenance device, specifically relates to the technical field of LNG unloading arm maintenance, including the thing board and ultrasonic flaw detector main part, and ultrasonic flaw detector main part is located the top of thing board, and the bottom fixedly connected with connecting frame of thing board, the bottom fixedly connected with the pivot of connecting frame, the outside rotatable connection with support frame of pivot through the bearing, the inside bottom fixedly connected with self -locking motor of support frame, and the output shaft end portion of self -locking motor is fixedly connected with pivot, and the top one side edge position department fixedly connected with the top frame of support frame. The utility model discloses through self -locking motor work drive thing board and swivel joint rotation, through ultrasonic flaw detector main part to the crack on the swivel joint pipeline and carry out the detection, and the stepping motor work drives the mount and ultrasonic flaw detector main part to move down, according to the height adjustment ultrasonic flaw detector main part's position of swivel joint, simple operation is convenient for the comprehensive detection swivel joint.

Description

Technical Field

[0001] This utility model relates to the field of LNG unloading arm maintenance technology, and more specifically, to a liquefied natural gas unloading arm rotary joint maintenance device. Background Technology

[0002] The liquefied natural gas (LNG) unloading arm is a key piece of equipment that connects LNG carriers to receiving terminal tanks and is used to transfer cryogenic LNG from the ship to the shore. The rotary joint is one of the core components of the unloading arm. Its function is to enable flexible rotation between different sections of the unloading arm, allowing the arm to swing freely in three-dimensional space. When the unloading arm reaches the end of its operating cycle, the rotary joint on the arm needs to be inspected and maintained.

[0003] A search revealed that Chinese patent CN219337491U discloses a maintenance device for a rotary joint of a liquefied natural gas (LNG) unloading arm. The device involves placing the LNG unloading arm rotary joint between two clamping plates on a workbench surface. Rotating the threaded rod causes a rotating block at one end of the threaded rod to rotate along a positioning block. The clamping plates and guide blocks work together to securely hold the bottom of the LNG unloading arm rotary joint, facilitating maintenance and preventing the joint from shaking during maintenance, thus ensuring safe maintenance of the unloading arm rotary joint.

[0004] When the above-mentioned maintenance device is in use, it uses two clamping plates to firmly clamp the bottom of the rotary joint of the liquefied natural gas unloading arm, and then uses an ultrasonic flaw detector to check for cracks in the rotary joint. However, it is inconvenient to rotate the rotary joint, making it difficult to fully inspect the rotary joint and inconvenient to repair it. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a liquefied natural gas unloading arm rotary joint maintenance device, which aims to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a liquefied natural gas unloading arm rotary joint repair device, comprising a placement plate and an ultrasonic flaw detector body, wherein the ultrasonic flaw detector body is located on the top of the placement plate, a connecting frame is fixedly connected to the bottom end of the placement plate, a rotating shaft is fixedly connected to the bottom end of the connecting frame, a support frame is movably connected to the outside of the rotating shaft via a bearing, a self-locking motor is fixedly connected to the bottom inside of the support frame, and the output shaft end of the self-locking motor is fixedly connected to the rotating shaft, a top frame is fixedly connected to one edge of the top of the support frame, and the ultrasonic flaw detector body is located inside the top frame, an adjustment component is provided on the top frame, the adjustment component includes a stepper motor, a first lead screw, two slide rods, a slide plate and a mounting bracket, the bottom end of the stepper motor is fixedly connected to the top frame, and the output shaft end of the stepper motor is fixedly connected to the first lead screw; An extrusion assembly is provided between the shelf and the connecting frame. The extrusion assembly includes a gear rod, two toothed plates, two extrusion plates, two gaskets, two limiting rods, a first bevel gear, a second bevel gear, and a handle.

[0007] Furthermore, the top and bottom ends of the first lead screw are movably connected to the top frame via bearings, and the outer side of the first lead screw is threadedly connected to the slide plate. One side of the mounting bracket passes through the top frame and is fixedly connected to the slide plate, while the other side of the mounting bracket is fixedly connected to the main body of the ultrasonic flaw detector.

[0008] Furthermore, the top and bottom ends of both slide rods are fixedly connected to the top frame, and both slide rods pass through the slide plate.

[0009] As can be seen, in the above technical solution, the two sliding rods restrict the rotation of the sliding plate.

[0010] Furthermore, the bottom end of the gear rod is movably connected to the connecting frame via a bearing, the two toothed plates are engaged with the gear rod on opposite sides, and the top ends of the two toothed plates are fixedly connected to the two extrusion plates respectively, and the two gaskets are fixedly connected to the two extrusion plates respectively on opposite sides.

[0011] Furthermore, both ends of the two limiting rods are fixedly connected to the connecting frame, and both limiting rods penetrate the two extrusion plates.

[0012] As can be seen, in the above technical solution, the two limiting rods and the two extrusion plates work together to restrict the deflection of the two toothed plates.

[0013] Furthermore, the first bevel gear is fixedly sleeved on the gear rod, and the front side of the first bevel gear meshes with the second bevel gear. The front side of the second bevel gear is fixedly connected to the handle, and the handle is movably connected to the front side of the connecting frame through a bearing.

[0014] It can be seen that the above technical solution is designed to facilitate the rotation of the gear rod.

[0015] Furthermore, auxiliary components are provided on opposite sides of the two extrusion plates. One of the auxiliary components includes a side plate, a vertical plate, a circular pressure plate, a second lead screw, two support brackets, two inserts, and a locking bolt. The side plate is fixedly connected to the extrusion plate.

[0016] Furthermore, the outer side of the second lead screw is threaded to the upright plate, and one end of the second lead screw is fixedly connected to the circular pressure plate. The two support brackets are respectively fixedly installed at the top edge of one side of the side plate and the upright plate. The two inserts are fixedly installed at the bottom edge of one side of the upright plate, and the two inserts are fixed to one of the support brackets by locking bolts.

[0017] The technical effects and advantages of this utility model are as follows: 1. This utility model uses a self-locking motor to drive the shelf and rotary joint to rotate. The position of the rotary joint can be adjusted according to the needs to facilitate maintenance personnel to inspect the pipes on the rotary joint. The ultrasonic flaw detector body can be used to detect cracks on the pipes of the rotary joint. The stepper motor drives the mounting bracket and the ultrasonic flaw detector body to move downward. The position of the ultrasonic flaw detector body can be adjusted according to the height of the rotary joint. The operation is simple and facilitates comprehensive inspection of the rotary joint. 2. This utility model drives the second bevel gear to rotate by turning the handle, which in turn drives the first bevel gear and gear rod to rotate, thereby driving the two extrusion plates and two gaskets to move towards each other. The two extrusion plates and two gaskets squeeze and fix the rotary joint. Similarly, reversing the handle releases the fixation between the rotary joint and the shelf. The structure is simple and easy to use. 3. This utility model places the upright plate on top of the side plate, and inserts two blocks into the receiving frame on the side plate. Then, the two blocks are fixed to the receiving frame by locking bolts. Rotating the second screw and moving it on the upright plate can drive the circular pressure plate to move horizontally. The circular pressure plate is used to assist in fixing the irregularly shaped rotary joint. Similarly, the upright plate can be disassembled. The structure is simple and easy to fix the irregularly shaped rotary joint. Attached Figure Description

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention viewed from below. Figure 3 This is a schematic diagram of the assembly structure of the adjustment component and the main body of the ultrasonic flaw detector of this utility model; Figure 4 This is a schematic diagram of the assembly structure of the extrusion component and the self-locking motor of this utility model; Figure 5 This is a schematic diagram of the extrusion assembly structure of this utility model; Figure 6 This is a schematic diagram of the auxiliary component structure of this utility model.

[0020] In the diagram: 1. Shelf; 2. Support frame; 3. Top frame; 4. Adjustment assembly; 5. Extrusion assembly; 6. Main body of ultrasonic flaw detector; 7. Connecting frame; 8. Rotating shaft; 9. Self-locking motor; 10. Auxiliary assembly; 401. Stepper motor; 402. First lead screw; 403. Slide rod; 404. Slide plate; 405. Mounting bracket; 501. Gear rod; 502. Toothed plate; 503. Extrusion plate; 504. Gasket; 505. Limiting rod; 506. First bevel gear; 507. Second bevel gear; 508. Handle; 1001. Side plate; 1002. Vertical plate; 1003. Circular pressure plate; 1004. Second lead screw; 1005. Receiving frame; 1006. Insert block; 1007. Locking bolt. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Refer to the instruction manual appendix Figure 1-6The liquefied natural gas unloading arm rotary joint repair device of this embodiment includes a placement plate 1 and an ultrasonic flaw detector body 6. The ultrasonic flaw detector body 6 is located on the top of the placement plate 1. A connecting frame 7 is fixedly connected to the bottom of the placement plate 1. A rotating shaft 8 is fixedly connected to the bottom of the connecting frame 7. A support frame 2 is movably connected to the outside of the rotating shaft 8 through a bearing. A self-locking motor 9 is fixedly connected to the bottom of the inside of the support frame 2. The output shaft end of the self-locking motor 9 is fixedly connected to the rotating shaft 8. A top frame 3 is fixedly connected to one edge of the top of the support frame 2. The ultrasonic flaw detector body 6 is located inside the top frame 3. An adjustment component 4 is provided on the top frame 3. The adjustment component 4 includes a stepper motor 401, a first lead screw 402, two slide rods 403, a slide plate 404, and a mounting bracket 405. The bottom of the stepper motor 401 is fixedly connected to the top frame 3, and the output shaft end of the stepper motor 401 is fixedly connected to the first lead screw 402.

[0023] Furthermore, the top and bottom ends of the first lead screw 402 are movably connected to the top frame 3 via bearings, and the outer side of the first lead screw 402 is threadedly connected to the slide plate 404. One side of the mounting bracket 405 passes through the top frame 3 and is fixedly connected to the slide plate 404, and the other side of the mounting bracket 405 is fixedly connected to the ultrasonic flaw detector body 6. The top and bottom ends of the two slide rods 403 are fixedly connected to the top frame 3, and both slide rods 403 pass through the slide plate 404.

[0024] Furthermore, a pressing assembly 5 is provided between the shelf 1 and the connecting frame 7. The pressing assembly 5 includes a gear rod 501, two toothed plates 502, two pressing plates 503, two gaskets 504, two limiting rods 505, a first bevel gear 506, a second bevel gear 507, and a handle 508. The bottom end of the gear rod 501 is movably connected to the connecting frame 7 via a bearing. The opposing sides of the two toothed plates 502 mesh with the gear rod 501, and the top ends of the two toothed plates 502 respectively mesh with the two pressing plates 503. 03 Fixed connection, the opposite sides of the two gaskets 504 are fixedly connected to the two extrusion plates 503 respectively, both ends of the two limiting rods 505 are fixedly connected to the connecting frame 7, and the two limiting rods 505 pass through the two extrusion plates 503. The first bevel gear 506 is fixedly sleeved on the gear rod 501, and the front side of the first bevel gear 506 meshes with the second bevel gear 507. The front side of the second bevel gear 507 is fixedly connected to the handle 508. The handle 508 and the front side of the connecting frame 7 are movably connected through the bearing.

[0025] When the rotary joint is placed on the shelf 1 and located between the two pressing plates 503, rotating the handle 508 drives the second bevel gear 507 to rotate. The handle 508 has stripes on its outer side to increase the friction between it and the connecting frame 7. Since the second bevel gear 507 meshes with the first bevel gear 506, it can drive the first bevel gear 506 and the gear rod 501 to rotate. Because both toothed plates 502 mesh with the gear rod 501, the two limiting rods... The gear rod 501, together with the two pressing plates 503, restricts the deflection of the two toothed plates 502. Therefore, the gear rod 501 can drive the two toothed plates 502 to move towards each other, thereby driving the two pressing plates 503 and the two gaskets 504 to move towards each other. The rotary joint is pressed and fixed by the two pressing plates 503 and the two gaskets 504. Similarly, the handle 508 is reversed to release the fixation between the rotary joint and the shelf 1. The structure is simple and easy to use. At the same time, the gaskets 504 can improve the stability between the pressing plates 503 and the rotary joint.

[0026] Furthermore, each of the two extrusion plates 503 has an auxiliary component 10 on its opposite side. One of the auxiliary components 10 includes a side plate 1001, a vertical plate 1002, a circular pressure plate 1003, a second lead screw 1004, two support brackets 1005, two insert blocks 1006, and a locking bolt 1007. The side plate 1001 is fixedly connected to the extrusion plate 503. The outer side of the second lead screw 1004 is threadedly connected to the vertical plate 1002, and one end of the second lead screw 1004 is fixedly connected to the circular pressure plate 1003. The two support brackets 1005 are respectively fixedly installed at the top edge of one side of the side plate 1001 and the vertical plate 1002. The two insert blocks 1006 are fixedly installed at the bottom edge of one side of the vertical plate 1002, and the two insert blocks 1006 are fixed to one of the support brackets 1005 by the locking bolt 1007.

[0027] The structure involves placing the upright plate 1002 on top of the side plate 1001, with two inserts 1006 inserted into the support frame 1005 on the side plate 1001. The two inserts 1006 are then fixed to the support frame 1005 by tightening bolts 1007. Similarly, multiple upright plates 1002 are installed. The second lead screw 1004 is rotated and moved on the upright plate 1002, thereby driving the circular pressure plate 1003 to move horizontally. The position of the second lead screw 1004 on the upright plate 1002 can also be adjusted. The circular pressure plate 1003 is used to assist in fixing the irregularly shaped rotary joint. Similarly, the upright plate 1002 can be disassembled. The structure is simple and facilitates the fixing of irregularly shaped rotary joints.

[0028] The usage method of this embodiment is as follows: In use, place the rotary joint on the shelf 1, and then fix the rotary joint to the shelf 1 by pressing component 5. Start the self-locking motor 9, which drives the rotating shaft 8 and connecting frame 7 to rotate, thereby rotating the shelf 1 and the rotary joint. Adjust the position of the rotary joint as needed to facilitate maintenance personnel to inspect the pipes on the rotary joint. Place the probe of the ultrasonic flaw detector body 6 on the pipes on the rotary joint, and then use the ultrasonic flaw detector body 6 to detect cracks on the pipes of the rotary joint. After one side of the rotary joint has been inspected... The self-locking motor 9 drives the rotary joint to rotate, and different positions of the rotary joint are detected. The stepper motor 401 is started, and the stepper motor 401 drives the first lead screw 402 to rotate. Since the first lead screw 402 is threadedly connected to the slide plate 404, and the two slide rods 403 restrict the rotation of the slide plate 404, the first lead screw 402 can drive the slide plate 404 to move downward, thereby driving the mounting bracket 405 and the ultrasonic flaw detector body 6 to move downward. The position of the ultrasonic flaw detector body 6 can be adjusted according to the height of the rotary joint. The operation is simple and facilitates comprehensive inspection of the rotary joint.

[0029] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A maintenance device for a rotary joint of a liquefied natural gas unloading arm, comprising a storage plate (1) and an ultrasonic flaw detector body (6), wherein the ultrasonic flaw detector body (6) is located on top of the storage plate (1), characterized in that: The bottom end of the shelf (1) is fixedly connected to a connecting frame (7), the bottom end of the connecting frame (7) is fixedly connected to a rotating shaft (8), the outside of the rotating shaft (8) is movably connected to a support frame (2) through a bearing, the bottom end of the support frame (2) is fixedly connected to a self-locking motor (9), and the output shaft end of the self-locking motor (9) is fixedly connected to the rotating shaft (8), the top edge of the support frame (2) is fixedly connected to a top frame (3), and the main body (6) of the ultrasonic flaw detector is located inside the top frame (3), the top frame (3) is provided with an adjustment component (4), the adjustment component (4) includes a stepper motor (401), a first lead screw (402), two slide rods (403), a slide plate (404) and a mounting bracket (405), the bottom end of the stepper motor (401) is fixedly connected to the top frame (3), and the output shaft end of the stepper motor (401) is fixedly connected to the first lead screw (402); A pressing assembly (5) is provided between the storage plate (1) and the connecting frame (7). The pressing assembly (5) includes a gear rod (501), two toothed plates (502), two pressing plates (503), two gaskets (504), two limiting rods (505), a first bevel gear (506), a second bevel gear (507), and a handle (508).

2. The LNG unloading arm rotary joint maintenance device according to claim 1, characterized in that: The top and bottom ends of the first lead screw (402) are connected to the top frame (3) by bearings, and the outer side of the first lead screw (402) is threadedly connected to the slide plate (404). One side of the mounting bracket (405) passes through the top frame (3) and is fixedly connected to the slide plate (404), and the other side of the mounting bracket (405) is fixedly connected to the ultrasonic flaw detector body (6).

3. The LNG unloading arm rotary joint maintenance device according to claim 1, characterized in that: The top and bottom ends of the two slide rods (403) are fixedly connected to the top frame (3), and the two slide rods (403) pass through the slide plate (404).

4. The liquefied natural gas unloading arm rotary joint maintenance device according to claim 1, characterized in that: The bottom end of the gear rod (501) is movably connected to the connecting frame (7) via a bearing. The two toothed plates (502) are meshed with the gear rod (501) on opposite sides, and the top ends of the two toothed plates (502) are fixedly connected to the two extrusion plates (503) respectively. The two gaskets (504) are fixedly connected to the two extrusion plates (503) on opposite sides respectively.

5. The LNG unloading arm rotary joint maintenance device according to claim 1, characterized in that: Both ends of the two limiting rods (505) are fixedly connected to the connecting frame (7), and both limiting rods (505) pass through the two extrusion plates (503).

6. The LNG unloading arm rotary joint maintenance device according to claim 1, characterized in that: The first bevel gear (506) is fixedly sleeved on the gear rod (501), and the front side of the first bevel gear (506) meshes with the second bevel gear (507). The front side of the second bevel gear (507) is fixedly connected to the handle (508). The handle (508) is movably connected to the front side of the connecting frame (7) through a bearing.

7. The LNG unloading arm rotary joint maintenance device according to claim 1, characterized in that: Each of the two extrusion plates (503) is provided with an auxiliary component (10) on one of their opposite sides. One of the auxiliary components (10) includes a side plate (1001), a vertical plate (1002), a circular pressure plate (1003), a second lead screw (1004), two support brackets (1005), two inserts (1006), and a locking bolt (1007). The side plate (1001) is fixedly connected to the extrusion plate (503).

8. The LNG unloading arm rotary joint maintenance device according to claim 7, characterized in that: The outer side of the second lead screw (1004) is threaded to the upright plate (1002), and one end of the second lead screw (1004) is fixedly connected to the circular pressure plate (1003). The two support brackets (1005) are respectively fixedly installed at the top edge of one side of the side plate (1001) and the upright plate (1002). The two inserts (1006) are fixedly installed at the bottom edge of one side of the upright plate (1002), and the two inserts (1006) are fixed to one of the support brackets (1005) by locking bolts (1007).

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