Deck beam structure of underwater grab bucket

Abstract

The utility model discloses a deck beam structure of an underwater grab bucket, which is a box body structure and comprises a box body and outer side plates welded on two longitudinal sides of the box body, the box body is composed of inner side plates on two longitudinal sides, and a front end plate, a rear end plate and a bottom plate which are welded between the inner side plates on the two longitudinal sides, the top of the box body is further provided with an inlet and outlet and a top sealing plate sealed on the inlet and outlet, the interior of the box body is divided into an oil cavity located on the lower portion and a mechanical cavity located on the upper portion through a partition plate, and the front end plate, the rear end plate and the bottom plate are formed by bending a whole steel plate. The bottom plate is symmetrically bent from the middle to form two inclined plates, so that a conical structure with the middle lower than the two ends is formed at the bottom of the box body, and a C-shaped middle reinforcing plate welded to the middle bent position of the bottom and the inner walls of the inner side plates on the two sides is further arranged in the oil cavity. The bottom of the box body is high in strength, and the box body has the advantages of being not prone to deformation and avoiding tearing of welding seams.

Description

Technical Field

[0001] This utility model belongs to the field of electro-hydraulic grab bucket technology, and particularly relates to an upper support beam structure for an underwater grab bucket. Background Technology

[0002] Underwater grab buckets are specialized lifting devices used to dredge various materials from the seabed, such as silt, sand, gravel, and boulders. Among underwater grab buckets, the electro-hydraulic double-lobed grab bucket is the most common. Previously, double-lobed underwater grab buckets typically had a capacity of 20 cubic meters. 3 The grab buckets below generally have small capacities and are inefficient in offshore operations.

[0003] As a result, a large-capacity double-lobed underwater grab bucket was later developed, with a grab bucket capacity reaching nearly 60m³. 3 The increase in grab capacity inevitably requires a larger upper support beam and a larger hydraulic oil tank. For a compact structure, the upper support beam of an underwater grab is generally a box structure with an internal cavity. This cavity is divided by a partition into a lower oil chamber and an upper mechanical chamber. The oil chamber stores hydraulic oil, while the mechanical chamber houses the hydraulic pump and the motor that drives it.

[0004] As can be seen from the above introduction, the upper support beam of the existing underwater grab bucket has the dual function of bearing weight and storing hydraulic oil. However, the upper support beam of the large underwater grab bucket is welded from steel plates and has a large size span. Under the huge weight, the overall strength of the bottom of the upper support beam is not high and it is easy to deform. As a result, the weld between the bottom plate and the surrounding side plates of the oil chamber is easily torn, which will cause oil leakage. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an upper support beam structure for an underwater grab bucket with high bottom strength and resistance to deformation to avoid weld tearing, so as to overcome the shortcomings of the existing technology.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An underwater grab bucket's upper support beam structure is a box-shaped structure, including a box body and outer side plates welded to the longitudinal sides of the box body. The box body is composed of inner side plates on both longitudinal sides and a front end plate, a rear end plate, and a bottom plate welded between the inner side plates. The top of the box body also has an inlet and an outlet and a top sealing plate sealed on the inlet and outlet. The interior of the box body is divided into an oil cavity at the bottom and a mechanical cavity at the top by a partition. The key feature is that the front end plate, the rear end plate, and the bottom plate are bent from a single piece of steel plate, and the bottom plate is symmetrically bent from the middle to form two inclined plates, so that the bottom of the box body forms a conical structure with a low middle and high ends. The oil cavity is also provided with a C-shaped intermediate reinforcing plate welded to the inner walls of the bottom middle bend and the inner side plates on both sides.

[0008] With the above structure, the front plate, rear plate, and bottom plate of this utility model are formed by bending a single piece of steel plate, reducing the number of welds between the bottom plate and the front and rear plates, and reducing the number of oil leakage points. Furthermore, the bottom plate is symmetrically bent into two inclined plates from the middle, creating a conical structure at the bottom of the housing that is lower in the middle and higher at both ends. This extends the welds between the bottom plate and the inner side plates, improving the weld strength between the bottom plate and the inner side plates. Additionally, the conical structure at the bottom, lower in the middle and higher at both ends, allows the bottom plate to distribute some of the weight horizontally when bearing pressure from the internal hydraulic oil, preventing the hydraulic oil from acting entirely vertically on the bottom plate, thus improving the load-bearing capacity of the bottom plate. Moreover, the added C-shaped intermediate reinforcing plate further enhances the strength of the bottom of the housing, making the bottom of the upper support beam less prone to deformation and the welds less prone to breakage, thereby preventing oil leakage.

[0009] In this invention, inner corner reinforcing plates are welded to the oil cavity at the bends at the ends of the base plate and the front end plate, and at the bends at the ends of the base plate and the rear end plate. This improves the strength of the bends at both corners of the base plate.

[0010] In this utility model, the inner wall of the inclined plate is welded with a first reinforcing rib extending laterally from the inner corner reinforcing plate to the middle reinforcing plate, and the inner wall of the oil cavity is welded with a second reinforcing rib extending vertically.

[0011] In this invention, the inner walls of the mechanical cavity are welded with vertically extending third reinforcing ribs.

[0012] In this invention, both the inner and outer side plates extend downward beyond the bottom plate, and both ends of the inner and outer side plates extend outward beyond the front and rear end plates. C-shaped outer corner reinforcing plates, welded to the bends at both ends of the bottom of the box and to both sides of the inner side plates, are also provided on the outer sides of the bends. This further enhances the strength of the bottom of the box from both ends.

[0013] In this invention, an upwardly extending lifting lug is welded to the middle position of the inner side plate. With this structure, when the grab bucket is working, the upper support beam is suspended by the lifting lug, and the load-bearing capacity of the grab bucket is transmitted vertically through the inner side plates on both sides. This prevents the welds between the inner side plates and the front, rear, and bottom plates from being pulled horizontally, thus reducing the risk of weld tearing.

[0014] In this utility model, reinforcing wing plates are welded to the upper edge of the inner side plate on both sides of the lifting lug.

[0015] In this invention, flange plates are provided at the edges of the inlet and outlet, and at the locations separating the oil chamber and the mechanical chamber. Sealing rings are provided between the top sealing plate and the flange plates, and between the partition plate and the flange plates, and are secured with bolts arranged in a ring. This structure ensures the airtightness of the enclosure, making the upper support beam suitable for underwater operations.

[0016] As can be seen from the above detailed description, the bottom of the box of this utility model has high strength and is not easily deformed, thus avoiding weld tearing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the underwater grab bucket of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the upper support beam of this utility model;

[0019] Figure 3 This is a cross-sectional perspective view of the upper support beam of this utility model;

[0020] Figure 4 A structural diagram showing the bending of a single board to create a base plate, front end plate, and rear end plate. Detailed Implementation

[0021] like Figure 1 As shown, the underwater grab bucket includes a gantry 100, an upper support beam 200 connected below the gantry 100, a double-lobed bucket body 300 connected below the upper support beam 200, and a hydraulic power device for driving the double-lobed bucket body 300 to open and close.

[0022] Among them, combined Figure 2 As shown, the upper support beam 200 of this utility model is a box structure, which is welded from 22mm steel plate and includes a box body 210 and outer side plates 222 welded on both longitudinal sides of the box body 210.

[0023] The housing 210 has a length of 6692 mm, a width of 3942 mm, and a height of 3524 mm. It is composed of inner side plates 211 on both longitudinal sides, and a front end plate 212, a rear end plate 213, and a bottom plate 214 welded between the inner side plates 211. The top of the housing 210 also has an inlet / outlet 215 and a top sealing plate 216 sealed over the inlet / outlet 215. The interior of the housing 210 is divided by a partition into an oil chamber 231 in the lower part and a mechanical chamber 232 in the upper part. The oil chamber 231 is used to store hydraulic oil, and the mechanical chamber 232 is used to house the hydraulic pump and the motor that drives the hydraulic pump.

[0024] Combination Figure 3 and Figure 4 As shown, in this utility model, the front end plate 212, the rear end plate 213, and the bottom plate 214 are formed by bending a single piece of steel plate. The bottom plate 214 is symmetrically bent into two inclined plates 214a from the middle so that the bottom of the box 210 forms a conical structure with a low middle and high ends. The oil cavity 231 is also provided with a C-shaped intermediate reinforcing plate 233, which is welded to the inner wall of the bottom middle bend 214b and the inner walls of the two inner side plates 211.

[0025] Since the front plate 212, rear plate 213, and bottom plate 214 are formed by bending a single piece of steel plate, the number of welds between the bottom plate 214 and the front plate 212 and rear plate 213 is reduced, thus reducing the number of oil leakage points. Furthermore, the bottom plate 214 is symmetrically bent into two inclined plates 214a from the middle, so that the bottom of the box body 210 forms a conical structure with a lower middle and higher ends. This extends the weld between the bottom plate 214 and the inner side plates 211 on both sides, improving the weld strength between the bottom plate 214 and the inner side plates 211. In addition, it also allows the bottom plate 214 to distribute some of the weight in the horizontal direction when bearing pressure on the internal hydraulic oil, preventing the hydraulic oil from acting entirely on the bottom plate 214 in the vertical direction, thereby improving the load-bearing capacity of the bottom plate 214. Moreover, the added C-shaped intermediate reinforcing plate 233 further improves the strength of the bottom of the box body, making the bottom of the upper support beam less prone to deformation and the weld less prone to breakage, thereby preventing oil leakage.

[0026] In the oil cavity 231, inner corner reinforcing plates 234 are welded to the end bends 214c of the base plate 214 and the front end plate 212, and the end bends 214c of the base plate 214 and the rear end plate 213. This can improve the strength of the two end bends of the base plate.

[0027] The inner walls of the two inclined plates 214a are welded with first reinforcing ribs 241 that extend laterally from the inner corner reinforcing plate 234 to the middle reinforcing plate 233, and the inner walls of the oil cavity 231 are welded with second reinforcing ribs 242 that extend vertically.

[0028] In addition, vertically extending third reinforcing ribs 243 are welded to the inner walls of the mechanical cavity 232.

[0029] In this embodiment, both the inner side plate 211 and the outer side plate 220 extend downward beyond the bottom plate 214, and both ends of the inner side plate 211 and the outer side plate 220 extend outward beyond the front end plate 212 and the rear end plate 213. C-shaped outer corner reinforcing plates 235, welded to the bottom end bends 214c of the box body 210 and to both inner side plates 211, are also provided on the outer sides of these bends. This further enhances the strength of the bottom of the box body 210 from both ends.

[0030] In addition to increasing the strength of the housing 210, the aforementioned reinforcing plates and ribs also increase the heat dissipation area, which is beneficial for cooling the hydraulic oil in the oil chamber 231 during grab bucket operation.

[0031] In this embodiment, an upwardly extending lifting lug 211a is welded to the middle position of the inner side plate 211. With this structure, when the grab bucket is working, the lifting lug 211a is connected to both ends of the hanger 100 by a pin, so that the upper support beam 200 is suspended below the hanger 100. The load of the grab bucket is transmitted vertically through the inner side plates 211 on both sides, which will not pull the welds of the inner side plate 211 to the front plate 212, the rear plate 213 and the bottom plate 214 in the horizontal direction, and is less likely to cause the welds to tear. The tension of the hanger 100 will not act on the top sealing plate 216, so as to avoid affecting the sealing effect of the top sealing plate 216 on the inlet and outlet 215.

[0032] In this embodiment, reinforcing wing plates 211b, which are welded to the upper edge of the inner side plate 211, are also welded to both sides of the lifting lug 211a, further improving the load-bearing strength of the lifting lug 211a.

[0033] In this embodiment, flange plates 251 are provided at the edges of the inlet / outlet 215 and at the boundary between the oil distribution chamber 231 and the mechanical chamber 232. Sealing rings are provided between the top sealing plate 216 and the flange plates 251, and between the partition plate and the flange plates 215, and are fastened by a ring of bolts 252. This structure ensures the airtightness of the housing 210, making the upper support beam suitable for underwater operations.

[0034] As can be seen from the above detailed description, the bottom of the box of this utility model has high strength and is not easily deformed, thus avoiding weld tearing.

Claims

1. A top support beam structure for an underwater grab bucket, which is a box structure, including a box body and outer side plates welded to the longitudinal sides of the box body. The box body is composed of inner side plates on both longitudinal sides and a front end plate, a rear end plate, and a bottom plate welded between the inner side plates. The top of the box body also has an inlet / outlet and a top sealing plate sealed on the inlet / outlet. The interior of the box body is divided by a partition into a lower oil chamber and an upper mechanical chamber, characterized in that: The front end plate, the rear end plate, and the bottom plate are formed by bending a single piece of steel plate. The bottom plate is symmetrically bent into two inclined plates from the middle so that the bottom of the box forms a conical structure with a low middle and high ends. The oil cavity is also provided with a C-shaped intermediate reinforcing plate welded to the inner wall of the bottom middle bend and the inner side plates on both sides.

2. The upper support beam structure of the underwater grab bucket according to claim 1, characterized in that: An inner corner reinforcing plate is welded inside the oil cavity at the end bends of the bottom plate and the front end plate, and at the end bends of the bottom plate and the rear end plate.

3. The upper support beam structure of the underwater grab bucket according to claim 2, characterized in that: The inner wall of the inclined plate is welded with a first reinforcing rib that extends laterally from the inner corner reinforcing plate to the middle reinforcing plate.

4. The upper support beam structure of the underwater grab bucket according to claim 3, characterized in that: The inner walls of the oil cavity are welded with vertically extending second reinforcing ribs.

5. The upper support beam structure of the underwater grab bucket according to claim 4, characterized in that: The mechanical cavity has vertically extending third reinforcing ribs welded to its inner walls.

6. The upper support beam structure of the underwater grab bucket according to claim 1, characterized in that: Both the inner and outer side plates extend downward beyond the bottom plate, and both ends of the inner and outer side plates extend outward beyond the front and rear end plates. C-shaped outer corner reinforcing plates are also provided on the outer sides of the bends at both ends of the bottom of the box, which are welded to the bends at the ends of the bottom plate and the inner side plates on both sides.

7. The upper support beam structure of the underwater grab bucket according to claim 1, characterized in that: An upward-extending lifting lug is welded to the middle position of the inner side plate.

8. The upper support beam structure of the underwater grab bucket according to claim 7, characterized in that: The lifting lugs are also welded to the upper edge of the inner side plate with reinforcing wing plates.

9. The upper support beam structure of the underwater grab bucket according to claim 1, characterized in that: Flange plates are provided at the edges of the inlet and outlet and at the positions separating the oil cavity and the mechanical cavity. Sealing rings are provided between the top sealing plate and the flange plate, and between the partition plate and the flange plate, and are fastened by bolts distributed in a circle.

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