Balance adjusting device for connecting structure of balance beam of ocean engineering crane

Abstract

The invention relates to the technical field of adjusting devices, and discloses a balance adjusting device for an ocean engineering crane balance beam connecting structure, the balance adjusting device comprises a balance beam body, the top of the balance beam body is fixedly covered with a first waterproof cover, and a bidirectional motor is fixedly mounted in the middle of the top of the balance beam body; two isolation plates are fixedly installed on the top of the balance beam body, and two balance adjusting mechanisms are arranged on the top of the balance beam body. The balancing weights are distributed at the top of the balance beam body at equal intervals, when the balance beam body inclines, the balance detection mechanism is triggered to control the two-way motor to be started, the two adjusting screw rods are driven to rotate at the same time, and then the balancing weights slide towards the high end of the balance beam body at the same time; balance adjustment can be completed by respectively sliding for a small distance, so that the situation that the balancing weight needs to be adjusted for a long distance during balance adjustment each time, the abrasion loss of the balancing weight is accelerated is avoided, and the service life of equipment is further prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of adjusting devices, and in particular to a balancing adjusting device for a balancing beam connecting structure of an offshore engineering crane. Background Art

[0002] Cranes are often used to transport cargo in marine engineering operations, and the balance beam is an important component of the crane. When lifting large objects, it is necessary to first assemble the balance beam at the bottom of the sling, and then fix the large object on the balance beam. The large object is lifted by lifting the balance beam. The balance beam is mainly used to maintain the balance of the hoisted equipment. The balance beam connection structure is a component installed on the balance beam, which is mainly divided into two types. One is installed at the center of the upper surface of the balance beam for connecting the sling, and the other is installed at the bottom of the balance beam for connecting the hook. However, when the weight of the cargo hung on each hook is inconsistent, it is easy to cause the balance beam to tilt, which is not conducive to the safe and stable lifting of the cargo to the designated position. Therefore, it is necessary to set a balance adjustment device on the balance beam.

[0003] In the prior art, a connection structure between balance beams on a crane (Announcement No.: CN210854970U) can adjust the support structure of the balance beam according to the different center of gravity of the cargo by adjusting the left and right positions of the two support plates under the main body of the balance beam, so that the balance beam can adapt to different deviations of the center of gravity of the cargo, thereby avoiding the tilt of the balance beam due to the deviation of the center of gravity of the cargo during cargo lifting, and ensuring the use effect of the balance beam. However, in the process of hanging heavy objects, the gravity of the cargo is transmitted to the first screw via the connecting plate and the support plate, and a very large torque is required in the process of adjusting the balance, and the resistance encountered by the connecting plate during the sliding process will also be directly affected by the weight of the cargo, thereby increasing the wear and loss, thereby greatly reducing the service life of the equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a balance adjustment device for a balance beam connection structure of an offshore engineering crane.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A balance adjustment device for a balance beam connection structure of an offshore engineering crane comprises a balance beam body, a first waterproof cover is fixedly connected to the top fixed cover of the balance beam body, a bidirectional motor is fixedly installed in the middle of the top of the balance beam body, two isolation plates are fixedly installed on the top of the balance beam body, two balance adjustment mechanisms are arranged on the top of the balance beam body, two lubrication mechanisms are symmetrically arranged at both ends of the balance beam body, each of the balance adjustment mechanisms comprises an adjusting screw, a plurality of counterweights, a first baffle and a second baffle, the second baffle is fixedly installed on the surface of the balance beam body, the two ends of the adjusting screw are respectively rotatably installed with the first baffle and one side of the isolation plate, a thread groove is opened in the middle of the surface of the adjusting screw and the surface near the two ends is smooth, a plurality of counterweights are equidistantly distributed and slidably installed on the top of the balance beam body, a plurality of counterweights are threadedly sleeved on the surface of the adjusting screw, the first baffle is slidably sleeved on the surface of the adjusting screw, a damping spring is fixedly installed between the second baffle and the first baffle, the adjusting screw passes through the middle of the damping spring, and a balance detection mechanism is arranged on the top of the first waterproof cover.

[0007] As a further solution of the present invention, the two isolation plates are symmetrically distributed on both sides of the bidirectional motor, and each of the isolation plates is respectively against the balance beam body and the inner wall of the first waterproof cover. The two output ends of the bidirectional motor are connected to two adjusting screws through a coupling, and the two adjusting screws are driven in the same direction. An inspection door is hinged on one side of the first waterproof cover.

[0008] As a further solution of the present invention, the lubrication mechanism includes a first fixed block, which is fixedly installed on one side of the balance beam body. A U-shaped cavity is opened inside the first fixed block and runs through the surface of one side thereof. An opening connected to the U-shaped cavity is opened on the side of the first fixed block away from the balance beam body. A blocking block is installed in the opening, and a piston return spring is fixedly installed on the side of the blocking block close to the U-shaped cavity.

[0009] As a further solution of the present invention, a first piston block and a second piston block are slidably installed in the U-shaped cavity. The first piston block and the second piston block are both cylindrical structures and the arc surfaces are against the inner wall of the U-shaped cavity. One end of the first piston block is fixedly installed with a piston return spring, and the second piston block is fixedly installed with a piston rod at one end close to the counterweight block, and the other end of the piston rod is fixedly installed with the first baffle.

[0010] As a further solution of the present invention, an extension tube is fixedly installed on the side of the first fixed block close to the counterweight block, and a plurality of circular holes are opened on the surface of the extension tube close to the adjusting screw, and an atomizing nozzle is fixedly installed in each of the circular holes. One end of the extension tube is a closed structure and the other end is an open structure, and the end of the extension tube in the open structure is connected to the U-shaped cavity.

[0011] As a further solution of the present invention, a hydraulic safety valve is embedded in each of the atomizing nozzles, two lubricating oil tanks are symmetrically fixedly installed on the top of the first waterproof cover, and an oil replenishing pipe connected to the U-shaped cavity is fixedly installed on the bottom of each lubricating oil tank.

[0012] As a further solution of the present invention, the balance detection mechanism includes two electric telescopic rods, a second fixed block, a balancing ball and two pressure sensors. The second fixed block is fixedly installed in the middle of the top of the first waterproof cover. The two electric telescopic rods are symmetrically fixedly installed on the top of the first waterproof cover, and the telescopic ends of the two electric telescopic rods are both facing the second fixed block.

[0013] As a further solution of the present invention, a smooth channel is opened inside the second fixed block and runs through its outer surface, the balancing ball is rolled in the smooth channel, the two pressure sensors are respectively fixedly installed on the telescopic ends of the two electric telescopic rods, and the two telescopic ends of the electric telescopic rods are slidably installed in the smooth channel.

[0014] As a further solution of the present invention, a microcontroller is fixedly installed on one side of the second fixed block, and the microcontroller is electrically connected to two electric telescopic rods, two pressure sensors and a bidirectional motor. The balance detection mechanism is surrounded by a second waterproof cover, and the second waterproof cover is fixedly installed on the top of the first waterproof cover.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting multiple counterweights equidistantly distributed on the top of the balance beam body, when the balance beam body tilts, the balance ball rolls to the lower end of the balance beam body, thereby triggering the balance detection mechanism to transmit a signal to the microcontroller. The microcontroller automatically controls the bidirectional motor to start and drive the two adjustment screws to rotate at the same time. The adjustment screw drives the counterweights on its surface to slide to the higher end of the balance beam body at the same time. Multiple counterweights only need to slide a short distance to complete the balance adjustment, avoiding the need to adjust the counterweights over a long distance each time the balance is adjusted, which accelerates the wear and loss, thereby increasing the service life of the equipment;

[0017] 2. By setting up a lubrication mechanism, when the balance adjustment mechanism drives the counterweight block thread to the optical axis surface of the adjustment screw, multiple counterweight blocks abut against each other and push the piston rod in the lubrication mechanism to move into the U-shaped cavity. The piston rod pushes the second piston block to squeeze the air inside the U-shaped cavity, and pushes the first piston block to squeeze the lubricating oil in the U-shaped cavity through air pressure, and blocks the oil replenishment pipe outlet at the bottom of the lubricating oil tank. When the lubricating oil pressure in the U-shaped cavity and the extension pipe reaches the threshold of the hydraulic safety valve, the lubricating oil is sprayed on the surface of the adjustment screw and the counterweight block through multiple atomizing nozzles, which has a lubricating effect on the balance adjustment mechanism, reduces the friction resistance of the sliding of the counterweight block, and thus improves the service life of the equipment;

[0018] 3. The thread groove of the adjusting screw is opened on the middle surface, and the surfaces near the two ends are smooth. Combined with the damping spring, when the counterweights are collectively driven to the smooth surface at one end of the adjusting screw for adjusting the balance, after the cargo lifting is completed, the adjusting screw rotates in the opposite direction. Under the slow resetting force of the damping spring, multiple counterweights are sequentially engaged with the thread groove of the adjusting screw at intervals. Then, under the drive of the adjusting screw, multiple counterweights are reset. At the same time, the first baffle is also reset under the drive of the damping spring, thereby driving the second piston block to reset. In the absence of air pressure squeezing and pushing, the piston reset spring pulls the first piston block to reset, so that the bottom of the oil replenishing pipe is connected to the U-shaped cavity to replenish the previously lost lubricating oil, thereby improving the linkage consistency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a balance adjustment device for a balance beam connection structure of an offshore engineering crane proposed by the present invention;

[0020] Figure 2 A schematic diagram of the split structure of the first waterproof cover and the second waterproof cover of a balance adjustment device for a balance beam connection structure of an offshore engineering crane proposed by the present invention;

[0021] Figure 3 A schematic diagram of the structure of a lubrication mechanism of a balance adjustment device for a balance beam connection structure of an offshore engineering crane proposed by the present invention;

[0022] Figure 4 This is a structural schematic diagram of a balance detection mechanism of a balance adjustment device for a balance beam connection structure of an offshore engineering crane proposed by the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a counterweight adjustment mechanism of a balance adjustment device for a balance beam connection structure of an offshore engineering crane proposed by the present invention;

[0024] Figure 6 A schematic cross-sectional structure diagram of a balance adjustment mechanism and a lubrication mechanism of a balance adjustment device for a balance beam connection structure of an offshore engineering crane proposed by the present invention;

[0025] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part A.

[0026] In the figure: 1. balance beam body; 2. first waterproof cover; 3. second waterproof cover; 4. lubricating oil tank; 5. lubrication mechanism; 6. inspection door; 7. bidirectional motor; 8. balance detection mechanism; 9. adjusting screw; 10. counterweight; 11. first baffle; 12. damping spring; 13. second baffle; 14. isolation plate; 401. oil supply pipe; 501. first fixed block; 502. extension pipe; 503. atomizing nozzle; 504. piston rod; 505. first piston block; 506. U-shaped cavity; 507. blocking block; 508. piston return spring; 509. second piston block; 510. hydraulic safety valve; 801. electric telescopic rod; 802. second fixed block; 803. smooth channel; 804. microcontroller; 805. balancing ball; 806. pressure sensor. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Reference Figure 1-Figure 7A balance adjustment device for a balance beam connection structure of an offshore engineering crane comprises a balance beam body 1, a first waterproof cover 2 is connected to a fixed cover on the top of the balance beam body 1, a bidirectional motor 7 is fixedly installed in the middle of the top of the balance beam body 1, two isolation plates 14 are fixedly installed on the top of the balance beam body 1, two balance adjustment mechanisms are arranged on the top of the balance beam body 1, and two lubrication mechanisms 5 are symmetrically arranged at both ends of the balance beam body 1, each balance adjustment mechanism comprises an adjusting screw 9, a plurality of counterweights 10, a first baffle 11 and a second baffle 13, and the second baffle 13 is fixedly installed on the balance beam body The surface of the balance beam body 1, the two ends of the adjusting screw 9 are rotatably installed with the first baffle 11 and one side of the isolation plate 14 respectively, a thread groove is opened in the middle of the surface of the adjusting screw 9 and the surface near the two ends is smooth, a plurality of counterweights 10 are equidistantly distributed and slidably installed on the top of the balance beam body 1, and the plurality of counterweights 10 are all threadedly sleeved on the surface of the adjusting screw 9, the first baffle 11 is slidably sleeved on the surface of the adjusting screw 9, a damping spring 12 is fixedly installed between the second baffle 13 and the first baffle 11, the adjusting screw 9 passes through the middle of the damping spring 12, and a balance detection mechanism 8 is provided on the top of the first waterproof cover 2.

[0031] When in use, the two isolation plates 14 are symmetrically distributed on both sides of the bidirectional motor 7, and each isolation plate 14 is respectively against the balance beam body 1 and the inner wall of the first waterproof cover 2. The two output ends of the bidirectional motor 7 are connected to the two adjusting screws 9 through a coupling. The two adjusting screws 9 are driven with the same thread to drive all the counterweights 10 to move in the same direction. An inspection door 6 is hinged on one side of the first waterproof cover 2 to facilitate daily maintenance of the bidirectional motor 7. Two isolation plates 14 are set to prevent the lubricating oil in the lubrication mechanism 8 from spraying in the bidirectional motor 7. By setting multiple counterweights The blocks 10 are evenly distributed on the top of the balance beam body 1. When the balance beam body 1 tilts, the balance detection mechanism 8 is triggered to transmit a signal to the microcontroller 804. The microcontroller 804 automatically controls the bidirectional motor 7 to start and drive the two adjusting screws 9 to rotate at the same time. The two adjusting screws 9 drive the counterweight blocks 10 on their respective surfaces to slide toward the higher end of the balance beam body 1 at the same time. Multiple counterweight blocks 10 only need to slide a short distance to complete the balance adjustment, avoiding the need to adjust the counterweight blocks 10 over a long distance each time the balance is adjusted, which accelerates their wear and loss, thereby increasing the service life of the equipment.

[0032] In this embodiment, the lubrication mechanism 5 includes a first fixed block 501, which is fixedly installed on one side of the balance beam body 1. A U-shaped cavity 506 is opened inside the first fixed block 501 and runs through one side of the surface thereof. The first fixed block 501 is opened on the side away from the balance beam body 1 and is connected to the U-shaped cavity 506. A blocking block 507 is installed in the opening. A piston return spring 508 is fixedly installed on the side of the blocking block 507 close to the U-shaped cavity 506. A first piston block 505 and a second piston block 509 are slidably installed in the U-shaped cavity 506. The first piston block 505 and the second piston block 509 are both cylindrical in structure and their arc surfaces are against the inner wall of the U-shaped cavity 506. One end of the first piston block 505 is fixedly installed with the piston return spring 508. A piston rod 504 is fixedly installed on one end of the second piston block 509 near the counterweight block 10, and the other end of the piston rod 504 is fixedly installed on the first baffle 11. An extension tube 502 is fixedly installed on the side of the first fixed block 501 near the counterweight block 10. A plurality of circular holes are opened on the surface of the extension tube 502 near the adjusting screw 9, and an atomizing nozzle 503 is fixedly installed in each circular hole. One end of the extension tube 502 is a closed structure and the other end is an open structure. One end of the extension tube 502 in the open structure is connected to the U-shaped cavity 506, and a hydraulic safety valve 510 is embedded in each atomizing nozzle 503. Two lubricating oil tanks 4 are symmetrically fixedly installed on the top of the first waterproof cover 2, and an oil replenishing pipe 401 connected to the U-shaped cavity 506 is fixedly installed at the bottom of each lubricating oil tank 4.

[0033] When in use, by setting the lubrication mechanism 8, when the balance adjustment mechanism drives the counterweight 10 threadedly to the optical axis surface of the adjusting screw 9, the multiple counterweights 10 abut against each other and push the piston rod 504 in the lubrication mechanism 8 to move into the U-shaped cavity 506, and the piston rod 504 pushes the second piston block 509 to squeeze the air inside the U-shaped cavity 506, and pushes the first piston block 505 through the air pressure to squeeze the lubricating oil in the U-shaped cavity 506, and blocks the outlet of the oil replenishing pipe 401 at the bottom of the lubricating oil tank 4. When the lubricating oil pressure in the U-shaped cavity 506 and the extension pipe 502 reaches the threshold of the hydraulic safety valve 510, the lubricating oil is sprayed on the surface of the adjusting screw 9 and the counterweight 10 through the multiple atomizing nozzles 503, which has a lubricating effect on the balance adjustment mechanism, reduces the friction resistance of the sliding of the counterweight 10, and thus improves the service life of the equipment;

[0034] By setting the thread groove of the adjusting screw 9 to be opened on the middle surface, and the surfaces near the two ends are smooth, and then combined with the damping spring 12, when the counterweight blocks 10 are collectively driven to the smooth surface at one end of the adjusting screw 9 for adjusting the balance, after the cargo lifting is completed, the adjusting screw 9 rotates in the opposite direction, and under the slow restoring force of the damping spring 12, multiple counterweight blocks 10 are sequentially engaged with the thread grooves of the adjusting screw 9 at intervals, and then driven by the adjusting screw 9, multiple counterweight blocks 10 complete the reset, and at the same time, the first baffle 11 is also reset under the drive of the damping spring 12, thereby driving the second piston block 509 to reset, and the first piston block 505 is reset by the piston reset spring 508 without the action of air pressure squeezing, so that the bottom of the oil replenishing pipe 401 is connected with the U-shaped cavity 506, replenishing the previously lost lubricating oil, thereby improving the linkage consistency of the equipment.

[0035] In this embodiment, the balance detection mechanism 8 includes two electric telescopic rods 801, a second fixed block 802, a balancing ball 805 and two pressure sensors 806. The second fixed block 802 is fixedly installed in the middle of the top of the first waterproof cover 2. The two electric telescopic rods 801 are symmetrically fixedly installed on the top of the first waterproof cover 2. The telescopic ends of the two electric telescopic rods 801 are both facing the second fixed block 802. A smooth channel 803 running through the outer surface of the second fixed block 802 is opened inside the second fixed block 802. The balancing ball 805 is rolled and placed in the smooth channel 803. The two pressure sensors 806 are respectively fixedly installed at the ends of the telescopic ends of the two electric telescopic rods 801. The telescopic ends of the two electric telescopic rods 801 are slidably installed in the smooth channel 803. A microcontroller 804 is fixedly installed on one side of the second fixed block 802. The microcontroller 804 is electrically connected to the two electric telescopic rods 801, the two pressure sensors 806 and the bidirectional motor 7. The balance detection mechanism 8 is surrounded by a second waterproof cover 3, and the second waterproof cover 3 is fixedly installed on the top of the first waterproof cover 2.

[0036] During use, when the balance beam body 1 tilts, the balancing ball 805 rolls toward one end of the smooth channel 803 and squeezes the pressure sensor 806. Depending on the tilt angle, the pressure sensor 806 detects different values ​​and transmits corresponding signal values ​​to the microcontroller 804. The microcontroller 804 analyzes and controls the bidirectional motor 7 to rotate a corresponding number of circles through the internal PLC system, thereby completing the position adjustment of multiple counterweights 10, so that the balance beam body 1 quickly restores balance, thereby improving the equipment's automated adjustment capability and avoiding manual adjustment that reduces work efficiency.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A balance adjustment device for a balance beam connection structure of an offshore crane, comprising a balance beam body (1), characterized in that: The top of the balancing beam body (1) is fixedly covered with a first waterproof cover (2), a bidirectional motor (7) is fixedly installed in the middle of the top of the balancing beam body (1), two isolation plates (14) are fixedly installed on the top of the balancing beam body (1), two balance adjustment mechanisms are arranged on the top of the balancing beam body (1), two lubrication mechanisms (5) are symmetrically arranged at both ends of the balancing beam body (1), each of the balance adjustment mechanisms comprises an adjustment screw (9), a plurality of counterweights (10), a first baffle plate (11) and a second baffle plate (13), the second baffle plate (13) is fixedly installed on the surface of the balancing beam body (1), the two ends of the adjustment screw (9) are respectively connected to the first baffle plate (11), and the second baffle plate (13) is fixedly installed on the surface of the balancing beam body (1). A baffle (11) and an isolation plate (14) are rotatably installed on one side, a thread groove is provided in the middle of the surface of the adjusting screw (9) and the surface near the two ends is smooth, a plurality of counterweights (10) are equidistantly distributed and slidably installed on the top of the balance beam body (1), the plurality of counterweights (10) are all threadedly sleeved on the surface of the adjusting screw (9), the first baffle (11) is slidably sleeved on the surface of the adjusting screw (9), a damping spring (12) is fixedly installed between the second baffle (13) and the first baffle (11), the adjusting screw (9) passes through the middle of the damping spring (12), and a balance detection mechanism (8) is provided on the top of the first waterproof cover (2).

2. A balance adjustment device for a balance beam connection structure of an offshore engineering crane according to claim 1, characterized in that: The two isolation plates (14) are symmetrically distributed on both sides of the bidirectional motor (7), and each of the isolation plates (14) is respectively abutted against the balance beam body (1) and the inner wall of the first waterproof cover (2). The two output ends of the bidirectional motor (7) are connected to two adjusting screws (9) through a coupling, and the two adjusting screws (9) are driven in the same direction. An inspection door (6) is hinged on one side of the first waterproof cover (2).

3. A balance adjustment device for a balance beam connection structure of an offshore crane according to claim 2, characterized in that: The lubrication mechanism (5) comprises a first fixed block (501), the first fixed block (501) being fixedly mounted on one side of the balance beam body (1), a U-shaped cavity (506) penetrating through one side surface of the first fixed block (501) being provided inside, an opening communicating with the U-shaped cavity (506) being provided on a side of the first fixed block (501) away from the balance beam body (1), a blocking block (507) being fixedly mounted in the opening, and a piston return spring (508) being fixedly mounted on a side of the blocking block (507) close to the U-shaped cavity (506).

4. A balance adjustment device for a balance beam connection structure of an offshore crane according to claim 3, characterized in that: A first piston block (505) and a second piston block (509) are slidably mounted in the U-shaped cavity (506); the first piston block (505) and the second piston block (509) are both cylindrical in structure and their arc surfaces are in contact with the inner wall of the U-shaped cavity (506); one end of the first piston block (505) is fixedly mounted to a piston return spring (508); one end of the second piston block (509) close to the counterweight block (10) is fixedly mounted to a piston rod (504); the other end of the piston rod (504) is fixedly mounted to a first baffle (11).

5. A balance adjustment device for a balance beam connection structure of an offshore crane according to claim 4, characterized in that: An extension tube (502) is fixedly installed on the side of the first fixed block (501) close to the counterweight block (10); a plurality of circular holes are opened on the surface of the extension tube (502) close to the adjusting screw rod (9); an atomizing nozzle (503) is fixedly installed in each of the circular holes; one end of the extension tube (502) is a closed structure and the other end is an open structure; the end of the extension tube (502) in the open structure is connected to the U-shaped cavity (506).

6. A balance adjustment device for a balance beam connection structure of an offshore crane according to claim 5, characterized in that: A hydraulic safety valve (510) is embedded in each of the atomizing nozzles (503); two lubricating oil tanks (4) are symmetrically fixedly installed on the top of the first waterproof cover (2); and an oil replenishing pipe (401) connected to the U-shaped cavity (506) is fixedly installed on the bottom of each of the lubricating oil tanks (4).

7. The balance adjustment device for the balance beam connection structure of an offshore crane according to claim 1, characterized in that: The balance detection mechanism (8) comprises two electric telescopic rods (801), a second fixed block (802), a balancing ball (805) and two pressure sensors (806); the second fixed block (802) is fixedly mounted in the middle of the top of the first waterproof cover (2); the two electric telescopic rods (801) are symmetrically fixedly mounted on the top of the first waterproof cover (2); and the telescopic ends of the two electric telescopic rods (801) are both facing the second fixed block (802).

8. The balance adjustment device for the balance beam connection structure of an offshore crane according to claim 7, characterized in that: The second fixed block (802) is provided with a smooth channel (803) penetrating its outer surface, the balancing ball (805) is rolled and placed in the smooth channel (803), the two pressure sensors (806) are respectively fixedly installed on the telescopic ends of the two electric telescopic rods (801), and the telescopic ends of the two electric telescopic rods (801) are slidably installed in the smooth channel (803).

9. A balance adjustment device for a balance beam connection structure of an offshore crane according to claim 8, characterized in that: A microcontroller (804) is fixedly mounted on one side of the second fixed block (802), and the microcontroller (804) is electrically connected to the two electric telescopic rods (801), the two pressure sensors (806) and the bidirectional motor (7). The balance detection mechanism (8) is surrounded by a second waterproof cover (3), and the second waterproof cover (3) is fixedly mounted on the top of the first waterproof cover (2).

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