A double flap underwater grab bucket body structure

Abstract

The utility model discloses a kind of double-petal underwater grab bucket body structures, including hopper bottom plate, respectively symmetrical welding in the hopper bottom plate both sides of hopper side plate and hopper lip plate, the hopper lip plate includes welding in the bottom of hopper bottom plate front end and respectively welding in the side of hopper side plate front end, the lower surface of the bottom of hopper lip plate is welded with a row of forward projecting bucket tooth, the hopper lip plate is integrally hot-press bending by thick steel plate thicker than hopper bottom plate and hopper side plate to form the bottom and the side, the inner wall of the hopper lip plate is flush with the inner wall of the hopper bottom plate and the hopper side plate, the outer wall of the hopper lip plate is higher than the outer wall of the hopper bottom plate and the hopper side plate, the inner wall surface and outer wall surface of the hopper lip plate are all with hardfacing.The utility model's double-petal underwater grab bucket body structure has the advantages that hopper lip strength is high and wear-resistant, bucket tooth is not easy to fall off when being subjected to strong impact and is convenient to replace when being damaged, service life is long, maintenance is convenient and maintenance cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of electro-hydraulic grab bucket technology, and particularly relates to the bucket body structure of a double-lobed 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 capacity reaching nearly 60m. 3 Because of its large capacity, the double-lobed grab bucket is naturally very large and heavy. During operation, the grab lip plate is subjected to significant impact and wear when it collides with the material on the seabed. The grab lip is easily deformed and worn, and the teeth welded to the grab lip plate are also prone to breakage. Repairing the grab lip and teeth is difficult and costly. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a bucket body structure of a double-lobed underwater grab with high bucket lip strength and wear resistance, so as to overcome the shortcomings of the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A double-lobed underwater grab bucket structure includes a bucket bottom plate, bucket side plates symmetrically welded to both sides of the bucket bottom plate, and a bucket lip plate. The bucket lip plate includes a bottom portion welded to the front end of the bucket bottom plate and a side portion welded to the front end of the bucket side plates. A row of forward-protruding bucket teeth is welded to the lower surface of the bottom of the bucket lip plate. The bucket lip plate is characterized in that: the bottom and the side portions are formed by integral hot-pressing and bending of a thick steel plate with a thickness greater than that of the bucket bottom plate and the bucket side plates; the inner wall of the bucket lip plate is flush with the inner walls of the bucket bottom plate and the bucket side plates; the outer wall of the bucket lip plate is higher than the outer walls of the bucket bottom plate and the bucket side plates; and both the inner and outer surfaces of the bucket lip plate are overlaid with weld.

[0007] With the above structure, the bucket lip plate of this utility model is formed by integral hot pressing and bending of a thick steel plate that is thicker than both the bucket bottom plate and the bucket side plate, which improves the overall strength of the bucket lip plate and ensures that the grab bucket will not deform even under heavy load and impact during operation. Furthermore, the inner and outer surfaces of the bucket lip plate are reinforced with weld overlays, which improves the wear resistance of the bucket lip plate and makes it less prone to wear.

[0008] In this invention, both ends of the bucket lip plate extend upward to the top of the bucket side plate. The top of the bucket side plate also has a connecting head that extends forward and is welded to the upper edge of the end of the bucket lip plate. The addition of the connecting head to the top of the side plate allows the rear edge of the bucket lip plate, the edges of the two ends, and the bucket bottom plate and bucket side plate to be welded together, further improving the strength of the bucket lip plate.

[0009] In this invention, the bottom plate is 15-20mm thick, the side plates are 50-60mm thick, and the lip plate is 150-200mm thick. Because the lip plate is too thick, it can only be formed by hot pressing.

[0010] In this invention, the connection between the bucket bottom plate and the bucket side plate, as well as the connection between the bottom and side of the bucket lip plate, are all smoothly transitioned. This smooth transition allows the grab bucket to more easily slide out of the bucket body when dumping materials, especially viscous materials such as sludge, preventing them from easily remaining inside the bucket.

[0011] In this invention, the bucket tooth comprises a tooth base welded to the lower surface of the bottom of the bucket lip plate and a tooth tip inserted into the front end face of the tooth base and protruding forward. The bucket tooth adopts a split structure, consisting of a tooth base and a tooth tip. In case of tooth tip wear or breakage, only the tooth tip needs to be removed from the tooth base for replacement, reducing maintenance difficulty and maintenance costs.

[0012] In this invention, the outer front edge of the bucket lip plate is an upwardly inclined chamfered surface. The tooth holder is divided into a welding part and a support part with a thickness significantly greater than the welding part. The welding part is welded to the lower surface of the bottom. The support part has an upper inclined surface welded to the chamfered surface and a lower inclined surface opposite to the upper inclined surface. With this structure, since the welding mating surface between the upper inclined surface of the support part and the chamfered surface of the bucket lip plate is inclined, when the bucket tooth is subjected to impact force, the chamfered surface of the bucket lip plate will provide support to the tooth holder in the opposite direction, further improving the support strength of the tooth holder. The tooth holder is less likely to fall off the bucket lip plate when subjected to strong impact.

[0013] In this invention, the rear end face of the tooth tip has a socket, the front end face of the support has a plug for inserting into the socket, the tooth tip has a pin hole around its circumference, and a pin is inserted into the pin hole to fix the plug in the socket. The pin is welded to the pin hole. This structure provides high support strength for the tooth tip from the tooth holder, and it is easy to disassemble when the tooth tip needs to be replaced. Simply break the weld between the pin and the pin hole, pull the pin out of the pin hole, and remove the tooth tip from the tooth holder.

[0014] In this invention, the outer wall of the bucket bottom plate is further welded with reinforcing ribs corresponding to each tooth seat, supporting the tooth seat from the rear. Each reinforcing rib has a front end welded to the rear end face and lower surface of the tooth seat and extending to the front end welded to the lower inclined surface. The rear end of the reinforcing rib extends to the rear end of the bucket bottom plate. This structure further provides rearward support strength to the tooth seat and improves the welding strength between the tooth seat and the bucket lip plate, while also increasing the strength of both the bucket bottom plate and the bucket lip plate.

[0015] In this invention, the lower surface of the welded part has an upward through-hole, and the four edges of the upper surface of the tooth holder and the upper edge of the hole are welded to the bucket lip plate. By adopting this structure, the tooth holder is welded to the bucket lip plate through two welds on the inner and outer rings, which further improves the welding strength between the tooth holder and the bucket lip plate and further ensures that the bucket teeth will not fall off when subjected to strong impacts.

[0016] As can be seen from the above detailed description, the bucket body structure of the double-lobed underwater grab bucket of this utility model has the advantages of high bucket lip strength and wear resistance, bucket teeth that are not easy to fall off when subjected to strong impact and are easy to replace when damaged, long service life, convenient maintenance and low maintenance cost. Attached Figure Description

[0017] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0018] Figure 2 This is a structural schematic diagram from a second perspective of the present invention;

[0019] Figure 3 This is a frontal view of a beak tooth;

[0020] Figure 4 This is a diagram of a beak tooth viewed from below. Detailed Implementation

[0021] like Figure 1 and Figure 2 The diagram shows the bucket body structure of the double-lobed underwater grab bucket of this invention. The bucket body 310 has a scoop-like structure, with a length of 4790mm, a width of 3480mm, and a height of 4374mm. The capacity of a single bucket body is 28m³ (the total capacity of the grab bucket is 56m³). 3The bucket is constructed entirely of steel plates through forming and welding, and includes a bottom plate 311, side plates 312 symmetrically welded to both sides of the bottom plate 311, and a lip plate 313. Both the bottom plate 311 and the side plates 312 are welded from steel plates. The bottom plate 311 has a thickness of 15-20 mm, and the side plates 312 have a thickness of 50-60 mm. The lip plate 313 is made of 150-200 mm thick steel plate through hot pressing, forming a bottom portion 313a welded to the front end of the bottom plate and side portions 313b welded to the front ends of the side plates 312. The width of the lip plate 313 along the material inlet / outlet direction is 452-844 mm.

[0022] In this embodiment, the thickness of the bottom plate 311 is 20mm, the thickness of the side plate 312 is 60mm, and the thickness of the lip plate 313 is 180mm. Since the lip plate 313 has an arc-shaped rim, meaning its width along the material inlet / outlet direction is wider in the middle and gradually narrows towards both sides, its widest point is 844mm and its narrowest point is 452mm.

[0023] The connection between the bottom plate 311 and the side plate 312, as well as the connection between the bottom 313a and the side 313b of the lip plate 313, are all smooth transitions. These smooth transitions allow the grab bucket to more easily slide out of the bucket body when dumping materials, especially viscous materials such as sludge, preventing them from easily remaining inside the bucket.

[0024] A row of forward-protruding bucket teeth 320 are welded to the lower surface of the bottom of the bucket lip plate 313.

[0025] The inner wall of the bucket lip plate 313 is flush with the inner walls of the bucket bottom plate 311 and the bucket side plate 312. The outer wall of the bucket lip plate 313 is higher than the outer walls of the bucket bottom plate 311 and the bucket side plate 312. Both the inner and outer surfaces of the bucket lip plate 313 have weld overlay 314.

[0026] In this utility model, the bucket lip plate 313 is formed by integral hot pressing and bending of a thick steel plate that is thicker than both the bucket bottom plate 311 and the bucket side plate 312, which improves the overall strength of the bucket lip plate 313 and ensures that the grab bucket will not deform even under heavy load and impact during operation. Furthermore, weld overlay 314 is provided on both the inner and outer surfaces of the bucket lip plate 313, which improves the wear resistance of the bucket lip plate and makes the bucket lip less prone to wear.

[0027] Both ends of the bucket lip plate 313 extend upward to the top of the bucket side plate 312. The top of the bucket side plate 312 also has a connecting head 312a that extends forward and is welded to the upper edge of the end of the bucket lip plate 313. The addition of the connecting head 312a to the top of the bucket side plate 313 further enhances the strength of the bucket lip plate 313 by welding the rear edge of the bucket lip plate 313 and the edges of the two ends of the bucket to the bucket bottom plate 311 and the bucket side plate 312.

[0028] The bucket tooth 320 comprises a tooth base 321 welded to the lower surface of the bottom 313a of the bucket lip plate 313 and a tooth tip 322 inserted into the front end face of the tooth base 321 and protruding forward. The bucket tooth 320 adopts a split structure, consisting of two parts: the tooth base 321 and the tooth tip 322. In the event of wear or breakage of the tooth tip 321, the tooth tip 322 can be simply removed from the tooth base 321 for replacement, reducing maintenance difficulty and cost.

[0029] In this embodiment, the outer front edge of the lip plate 313 is an upwardly inclined chamfered surface 313c. The tooth holder 321 is divided into a welding part 321a and a support part 321b with a thickness significantly greater than that of the welding part 321a. The welding part 321a is directly welded to the lower surface of the bottom 313a. The support part 321b has an upper inclined surface 321c welded to the chamfered surface 313c and a lower inclined surface 321d opposite to the upper inclined surface 321c. With this structure, since the welding mating surface between the upper inclined surface 321c of the support part 321b and the chamfered surface 313c of the lip plate 313 is inclined, when the bucket tooth 320 is subjected to impact force, the chamfered surface 313c of the lip plate 313 will provide support to the tooth holder 321 in the opposite direction, further improving the support strength of the tooth holder 321. The tooth holder 321 is not easy to fall off the lip plate 313 when subjected to strong impact.

[0030] Combination Figure 3 and Figure 4 As shown, in this embodiment, the rear end face of the tooth tip 322 has a socket, and the front end face of the support portion 321b has a plug for inserting into the socket. The tooth tip 322 has a pin hole 322a around its circumference, and a pin 322b is inserted into the pin hole 322a to fix the plug in the socket (the plug also has a pin hole). The pin 322b is welded to the pin hole 322a. With this structure, the tooth base 321 provides high support strength for the tooth tip 322, and it is easy to disassemble when the tooth tip 322 needs to be replaced. Simply break the weld between the pin 322b and the pin hole 322a, pull the pin 322b out of the pin hole 322a, and remove the tooth tip 322 from the tooth base 321.

[0031] In addition, a reinforcing rib 324 supporting the tooth seat 321 from the rear is welded to the outer wall of the bucket bottom plate 311 corresponding to each tooth seat 321. This reinforcing rib 324 has a front end 324a welded to the rear end face and lower surface of the tooth seat 321 and extending to the lower inclined surface 321d. The rear end 324b of the reinforcing rib 324 extends to the rear end of the bucket bottom plate 311. With this structure, the reinforcing rib 324 further provides rearward support strength to the tooth seat 321 and improves the welding strength between the tooth seat 321 and the bucket lip plate 313, thus simultaneously increasing the strength of both the bucket bottom plate 311 and the bucket lip plate 313.

[0032] Furthermore, the lower surface of the welded part 321a has an upward-through rectangular hole 321e. Thus, the four edges of the upper surface of the tooth holder 321 and the upper edge of the hole 321e are welded to the bucket lip plate 313. By adopting this structure, the tooth holder 321 is welded to the bucket lip plate through two weld seams, one inner and one outer, further improving the welding strength between the tooth holder 321 and the bucket lip plate 313, and further ensuring that the bucket tooth 320 will not fall off under strong impact.

[0033] As can be seen from the above detailed description, the bucket body structure of the double-lobed underwater grab bucket of this utility model has the advantages of high bucket lip strength and wear resistance, bucket teeth that are not easy to fall off when subjected to strong impact and are easy to replace when damaged, long service life, convenient maintenance and low maintenance cost.

Claims

1. A double flap underwater grab bucket body structure comprising a bucket bottom plate, a pair of bucket side plates symmetrically welded on both sides of the bucket bottom plate, and a bucket lip plate, the bucket lip plate comprising a bottom part welded on the front end of the bucket bottom plate and a pair of side parts welded on the front end of the bucket side plates respectively, and a row of bucket teeth protruding forward is welded on the lower surface of the bottom part of the bucket lip plate, characterized in that: The lip plate is integrally hot-pressed and bent from a thick steel plate that is thicker than both the bottom plate and the side plate to form the bottom and the side. The inner wall of the lip plate is flush with the inner walls of the bottom plate and the side plate, and the outer wall of the lip plate is higher than the outer walls of the bottom plate and the side plate. Both the inner and outer surfaces of the lip plate are welded together.

2. The double flap underwater grab bucket body structure according to claim 1, characterized in that: Both ends of the bucket lip plate extend upward to the top of the bucket side plate, and the top of the bucket side plate also has a connecting head that extends forward and is welded to the upper edge of the end of the bucket lip plate.

3. The double flap underwater grab bucket body structure according to claim 1, characterized in that: The thickness of the bucket bottom plate is 15-20mm, the thickness of the bucket side plate is 50-60mm, and the thickness of the bucket lip plate is 150-200mm.

4. The double flap underwater grab bucket body structure according to claim 1, characterized in that: The connection between the bottom plate and the side plate, as well as the connection between the bottom and side of the lip plate, are all smoothly transitioned.

5. The double flap underwater grab bucket body structure according to claim 1, characterized in that: The bucket teeth consist of a tooth base welded to the lower surface of the bottom of the bucket lip plate and a tooth tip inserted into the front end face of the tooth base and protruding forward.

6. The double flap underwater grab bucket body structure according to claim 5, characterized in that: The outer wall front edge of the lip plate is an upwardly inclined chamfered surface. The tooth seat is divided into a welding part and a support part with a thickness significantly greater than that of the welding part. The welding part is welded to the lower surface of the bottom. The support part has an upper inclined surface welded to the chamfered surface and a lower inclined surface opposite to the upper inclined surface.

7. The double flap underwater grab bucket body structure according to claim 6, characterized in that: The rear end face of the tooth tip has a socket, the front end face of the support has a plug that can be inserted into the socket, the tooth tip has a pin hole around its circumference, a pin is inserted into the pin hole to fix the plug in the socket, and the pin is welded to the pin hole.

8. The double flap underwater grab bucket body structure according to claim 7, characterized in that: The outer wall of the bucket bottom plate is also welded with a reinforcing rib that supports the tooth seat from the rear. The reinforcing rib has a front end welded to the rear end face and lower surface of the tooth seat and extends all the way to the rear end of the bucket bottom plate.

9. The double flap underwater grab bucket body structure according to claim 7, characterized in that: The lower surface of the welded part has an upward through hole, and the four edges of the upper surface of the tooth seat and the upper opening edge of the hole are welded to the lip plate.

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