Rake head grid for preventing timber piles

By introducing rigid and flexible grid structures into the scraper head grid, the problem of wooden piles getting stuck was solved, enabling efficient construction and convenient cleaning, and improving the construction efficiency of the scraper suction dredger.

CN223577199UActive Publication Date: 2025-11-21CCCC TDC BINHAI ENVIRONMENTAL CHANNEL DREDGING
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Patent Information

Application Number
CN202423152671.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-11-21
Estimated Expiration
2034-12-19

AI Technical Summary

Technical Problem

Existing rake-head bar screens are prone to getting stuck on wooden piles during underwater construction and are difficult to remove, affecting construction efficiency.

Method used

A log-blocking grid is designed, which adopts an inner rigid grid and an outer flexible grid structure. The flexible grid is composed of detachable grid chains, which can be flexibly disassembled and assembled to solve the problem of log obstruction.

Benefits of technology

Effectively prevents wooden piles from getting stuck, improves construction efficiency, and the detachable design of the flexible grid makes it easy to clean and enhances the flexibility of equipment use.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223577199U_ABST
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Abstract

The utility model relates to a rake head grille capable of preventing timber piles. Comprising a hard grid installed on a drag head suction port and a flexible grid installed on the outer side of the hard grid. The hard grating is formed by splicing and welding a plurality of transverse grating plates and longitudinal grating plates; the flexible grating comprises a left-end mounting beam and a right-end mounting beam which are detachably mounted on the two sides of the drag head suction port, a plurality of transverse grating chains are arranged between the left-end mounting beam and the right-end mounting beam, and the left ends of the grating chains are detachably connected with the left-end mounting beam through end fixing pieces. The right end of the grating chain is detachably connected with the right end mounting beam through an end fixing piece, and the position, crossed with the longitudinal grating plates, of the middle of the grating chain is detachably connected through a middle fixing piece. The utility model provides a rake head grating capable of preventing timber piles. The rake head grating capable of preventing timber piles solves the problems that timber piles are prone to being blocked and are not easy to clean after being blocked.
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Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drag suction dredger facilities, and particularly relates to a wood pile prevention rake head grating. BACKGROUND

[0002] The rake head device configured to the drag suction dredger is moved by the construction ship during underwater drag suction construction, the rake teeth on the rake head have a crushing effect on the mud surface below, the rake head is also provided with a mud pump, under the action of the mud pump, the crushed bottom mud is mixed with water and is sucked into the suction port and is transferred to the mud tank of the drag suction dredger along the pipeline. In order to prevent large stones, wood piles and the like from entering the suction port and causing pipe and pump blockage, a grating is usually installed on the suction port of the rake head, the grating is used to reduce the aperture of the suction port, and the stones, wood piles and the like with a size larger than the aperture of the grating are intercepted outside.

[0003] However, the grating of the foregoing structure can usually have a good effect on rigid stones, but still has a blockage problem for wood piles with a certain flexibility, and the reason is that: in order to ensure the passability of the mud, the aperture size of the grating cannot be too small, which leads to the wood piles being still sucked into and blocked in the grating. On the other hand, the foregoing grating is a fixed grating, and when the wood piles are blocked in the grating, it is very difficult to clean, and the cleaning work is time-consuming and laborious, which significantly affects the time efficiency of the ship. In summary, a new type of wood pile prevention rake head grating needs to be developed and designed to solve the problems of easy blocking of wood piles and difficulty in cleaning after the wood piles are blocked. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a wood pile prevention rake head grating to solve the problems of easy blocking of wood piles and difficulty in cleaning after the wood piles are blocked.

[0005] The utility model adopts the technical scheme: a wood pile prevention rake head grating, comprising a hard grating installed on the suction port of the rake head and a flexible grating installed on the outer side of the hard grating, the hard grating is composed of a plurality of transverse grating plates and longitudinal grating plates, the flexible grating comprises left end mounting beams and right end mounting beams which are detachably installed on both sides of the suction port of the rake head, a plurality of transversely arranged grating chains are arranged between the left end mounting beams and the right end mounting beams, the left end of the grating chain is detachably connected with the left end mounting beam through end fixing members, the right end of the grating chain is detachably connected with the right end mounting beam through end fixing members, and the middle part of the grating chain is detachably connected with the longitudinal grating plates through middle fixing members at positions intersecting with the longitudinal grating plates.

[0006] Preferably, the middle fixing member comprises a base detachably connected with the longitudinal grating plate, two connecting seats with pin holes are arranged at the middle part of the base in opposition, the chain petals of the grating chain are located between the two connecting seats and are connected through a pin shaft, and a detachable protective end cover is further installed on the base, and a conical protrusion is arranged on the outside of the protective end cover.

[0007] Preferably, a cover containing groove for containing the chain segment is arranged in the interior of the protective end cover, a base containing groove for containing the chain segment is arranged in the middle of the base, an end cover side groove for containing the chain segment is arranged in the edge of the protective end cover, and a base side groove for containing the chain segment is arranged in the edge of the base.

[0008] Preferably, a left support plate and a right support plate are arranged on both sides of the bottom of the base, and the longitudinal grid plate is located between the left support plate and the right support plate, a plurality of adjusting holes are arranged on the left support plate and the right support plate, an assembling hole is arranged on the longitudinal grid plate, and the middle fixing member is fixedly connected with the longitudinal grid plate through an adjusting bolt penetrating through the assembling hole and one of the adjusting holes.

[0009] Preferably, threaded holes are arranged at four corner positions of the base, connecting holes are arranged at four corner positions of the protective end cover, and the protective end cover is fixedly connected with the base through assembling screws arranged in the threaded holes and the connecting holes.

[0010] Preferably, the end fixing member comprises a fixed block with a notch, a pin hole penetrating through the notch is further arranged on the fixed block, the chain segment of the grid lock chain is located in the notch and connected through a lock pin, an upper groove is arranged on the left end mounting beam and the right end mounting beam, the width of the upper groove is equal to the width of the end fixing member, the fixed block is located in the upper groove and fixedly connected through screws.

[0011] Preferably, a plurality of countersunk screw holes are arranged on the left end mounting beam and the right end mounting beam, and the left end mounting beam and the right end mounting beam are fixedly mounted on both sides of the rake head suction port through mounting screws.

[0012] The utility model discloses the advantages and positive effects are:

[0013] The utility model provides a kind of wood pile rake head grid, compared with prior rake head grid, the rake head grid in the utility model is constituted by the hard grid of inside and the flexible grid of outside, the through aperture size of hard grid is further reduced by flexible grid, so further can be retained in the block stone and wood pile in mud, since the main part of flexible grid is multiple transverse grid lock chain, and the chain segment of grid lock chain is hollow, so setting flexible grid does not significantly reduce the passing rate of mud in rake head suction port. After the through aperture size is reduced, the rake head grid of the utility model exerts more optimal retention effect on wood pile, can effectively solve the problem that rake head grid is blocked by wood pile.

[0014] On the other hand, since the end of the flexible grating on the outer side is detachably connected with the left end mounting beam and the right end mounting beam, and the middle part is detachably connected with the longitudinal grating plate by the middle fixing part, even if the wood pile is blocked, the rake head grating can quickly solve the wood pile blocking problem by detaching the grating chain, so that the rake head grating solves the problem that the wood pile is not easy to clean after being blocked. BRIEF DESCRIPTION OF DRAWINGS DETAILED DESCRIPTION OF THE INVENTION OF THE INVENTION BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view structural schematic diagram of the utility model;

[0016] Figure 2 is Figure 1 is a front view structural schematic diagram of the middle fixing part in

[0017] Figure 3 is Figure 2 is a sectional view structural schematic diagram of A-A position in

[0018] In the drawings:

[0019] 1, end fixing part; 2, left end mounting beam; 3, mounting screw; 4, beam groove; 5, countersunk hole; 6, middle fixing part; 6-1, base; 6-2, protective end cover; 6-3, assembling screw; 6-4, pin shaft; 6-5, cover content slot; 6-6, connecting seat; 6-7, end cover side groove; 6-8, base side groove; 6-9, base containing groove; 6-10, adjusting hole; 6-11, left support plate; 6-12, right support plate; 7, grating chain; 8, right end mounting beam; 9, rake head suction port; 10, longitudinal grating plate; 11, transverse grating plate; 12, adjusting bolt. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to further understand the invention content, characteristics and effects of the utility model, the following embodiments are described in detail.

[0021] Please refer to Figure 1 The wood pile preventing rake head grating of the utility model comprises a hard grating mounted on a rake head suction port 9 and a flexible grating mounted on the outer side of the hard grating. Therefore, the rake head grating has an inner and outer double-layer grating structure, wherein the flexible grating on the outer side further reduces the through hole size of the hard grating on the inner side, further traps the boulders and wood piles in the mud, and especially avoids the problem that the large size wood pile is blocked on the hard grating and is not easy to clean.

[0022] The hard grid is welded by a plurality of transverse grid plates 11 and longitudinal grid plates 10, specifically, the left end of the transverse grid plate 11 is welded and fixed with the left inner wall of the rake suction port 9, the right end is welded and fixed with the right inner wall of the rake suction port 9, the upper end of the longitudinal grid plate 10 is welded and fixed with the top inner wall of the rake suction port 9, the lower end is welded and fixed with the bottom inner wall of the rake suction port 9, and each transverse grid plate 11 is welded and fixed with each longitudinal grid plate 10 at the intersection position.

[0023] The flexible grid includes a left end mounting beam 2 and a right end mounting beam 8 which are detachably mounted on both sides of the rake suction port 9, a plurality of transverse grid lock chains 7 are arranged between the left end mounting beam 2 and the right end mounting beam 8, the left end of the grid lock chain 7 is detachably connected with the left end mounting beam 2 by using an end fixing part 1, the right end of the grid lock chain 7 is detachably connected with the right end mounting beam 8 by using an end fixing part 1, and the middle part of the grid lock chain 7 is detachably connected with each longitudinal grid plate 10 at the intersection position by using a middle fixing part 6.

[0024] Therefore, the flexible grid on the outside can be completely detached from the rake suction port 9, after the flexible grid is detached, only the hard grid is reserved on the rake suction port 9, so that whether to install the flexible grid on the outside can be selected according to the needs in actual construction, and the use is flexible. On the other hand, each grid lock chain 7 can also be individually disassembled.

[0025] In the embodiment, a plurality of countersunk screw holes 5 are arranged on the left end mounting beam 2 and the right end mounting beam 8, and the left end mounting beam 2 and the right end mounting beam 8 are mounted and fixed on both sides of the rake suction port 9 by using mounting screws 3 arranged in the countersunk screw holes 5, which enables the left end mounting beam 2 and the right end mounting beam 8 to be disassembled. The advantage of placing the mounting screws 3 into the countersunk screw holes 5 is that the problem of bumping and wear of the mounting screws 3 is weakened to a certain extent.

[0026] In the embodiment, the end fixing part 1 includes a fixed block with a notch, a pin hole penetrating through the notch is further arranged on the fixed block, and the chain petals at the end of the grid lock chain 7 are located in the notch and connected by using a locking pin; a beam groove 4 is arranged on the left end mounting beam 2 and the right end mounting beam 8, the width of the beam groove 4 is equal to the width of the end fixing part 1, and the fixed block is located in the beam groove 4 and connected by using a screw. By allowing the end fixing part 1 to fall into the beam groove 4, the problem of bumping and wear can be weakened to a certain extent. The locking pin is inserted into the pin hole on the fixed block to fix the chain petals at the end of the grid lock chain 7. Since the width of the beam groove 4 is equal to the width of the end fixing part 1, when the fixed block is mounted and fixed into the beam groove 4 by using a screw, the locking pin cannot be automatically removed.

[0027] Please refer to Figure 2 and Figure 3 It can be seen that:

[0028] The middle fixing part 6 comprises a base 6-1 detachably connected with the longitudinal grating plate 10, and two opposite connecting seats 6-6 with pin holes are arranged in the middle of the base 6-1, and the chain petals of the grating lock chain 7 are located between the two connecting seats 6-6 and are connected by a pin shaft 6-4. A detachable protective end cover 6-2 is further arranged on the base 6-1, and a tapered protrusion is arranged on the outer portion of the protective end cover 6-2. The protective end cover 6-2 has the following functions: firstly, the protective end cover 6-2 can protect the connecting seats 6-6, the lock pin and the chain petals from being directly impacted by sand and stones; secondly, after the protective end cover 6-2 is installed, the pin shaft 6-4 cannot be self-disengaged; and thirdly, the tapered protrusion arranged on the outer portion can guide the sand and stones in the mud to flow to the periphery, thereby reducing the impact and abrasion of the middle fixing part 6.

[0029] In the embodiment, threaded holes are arranged at the four corners of the base 6-1, and connecting holes are arranged at the four corners of the protective end cover 6-2, and the protective end cover 6-2 is fixedly connected with the base 6-1 by assembly screws 6-3 arranged in the threaded holes and the connecting holes.

[0030] In the embodiment, cover containing grooves 6-5 for containing the chain petals are arranged in the inner portion of the protective end cover 6-2, base containing grooves 6-9 for containing the chain petals are arranged in the middle of the top portion of the base 6-1, end cover side grooves 6-7 for containing the chain petals are arranged at the edges of the protective end cover 6-2, and base side grooves 6-8 for containing the chain petals are arranged at the edges of the base 6-1. The cover containing grooves 6-5, the base containing grooves 6-9, the end cover side grooves 6-7 and the base side grooves 6-8 have the following functions: the middle fixing part 6 can better clench and fix the chain petals of the grating lock chain 7.

[0031] In the embodiment, left and right support plates 6-11 and 6-12 are arranged at the two sides of the bottom portion of the base 6-1 and the longitudinal grating plate 10 is located between the two support plates, a plurality of groups of adjusting holes 6-10 are arranged on the left and right support plates 6-11 and 6-12, assembly holes are arranged on the longitudinal grating plate 10, and the middle fixing part 6 is fixedly connected with the longitudinal grating plate 10 by adjusting bolts 12 penetrating through the assembly holes and one group of the adjusting holes 6-10. In this way, by arranging the adjusting bolts 12 in different adjusting holes 6-10, the relative positions of the middle fixing part 6 and the longitudinal grating plate 10 along the longitudinal direction of the rake head suction port 9 can be adjusted, so that the grating lock chain 7 can be appropriately loosened or tensioned.

Claims

1. A type of anti-stubble rake head grid, characterized in that: It includes a rigid grid installed on the rake head suction port (9) and a flexible grid installed on the outside of the rigid grid; the rigid grid is welded together from multiple transverse grid plates (11) and longitudinal grid plates (10); the flexible grid includes a left end mounting beam (2) and a right end mounting beam (8) detachably installed on both sides of the rake head suction port (9), and multiple transverse grid chains (7) are provided between the left end mounting beam (2) and the right end mounting beam (8). The left end of the grid chain (7) is detachably connected to the left end mounting beam (2) by an end fastener (1), and the right end of the grid chain (7) is detachably connected to the right end mounting beam (8) by an end fastener (1). The middle part of the grid chain (7) is detachably connected to each longitudinal grid plate (10) by a middle fastener (6).

2. The anti-stubble rake head grid as described in claim 1, characterized in that: The central fixing member (6) includes a base (6-1) detachably connected to the longitudinal grid plate (10). Two opposing connecting seats (6-6) with pin holes are provided in the middle of the base (6-1). The chain petals of the grid chain (7) are located between the two connecting seats (6-6) and connected by a pin (6-4). A detachable protective end cap (6-2) is also installed on the base (6-1). The protective end cap (6-2) has a tapered protrusion on its exterior.

3. The anti-stubble rake head grid as described in claim 2, characterized in that: in The protective end cap (6-2) has an inner cover receiving groove (6-5) for accommodating chain petals, and the base (6-1) has a base receiving groove (6-9) for accommodating chain petals in the middle; the protective end cap (6-2) has an end cap side groove (6-7) for accommodating chain petals on the edge, and the base (6-1) has a base side groove (6-8) for accommodating chain petals on the edge.

4. The anti-stubble rake head grid as described in claim 3, characterized in that: in The base (6-1) has a left support plate (6-11) and a right support plate (6-12) on its bottom sides respectively, and the longitudinal grid plate (10) is located between the two. Multiple sets of adjustment holes (6-10) are provided on the left support plate (6-11) and the right support plate (6-12), and assembly holes are provided on the longitudinal grid plate (10). The middle fixing member (6) is fixedly connected to the longitudinal grid plate (10) by adjusting bolts (12) that pass through the assembly hole and one of the adjustment holes (6-10).

5. The anti-stubble rake head grid as described in claim 4, characterized in that: in The base (6-1) has threaded holes at its four corners, and the protective end cap (6-2) has connecting holes at its four corners. The protective end cap (6-2) is fixedly connected to the base (6-1) by assembly screws (6-3) located in the threaded holes and connecting holes.

6. The anti-stubble rake head grid as described in claim 5, characterized in that: The end fastener (1) includes a fixing block with a slot, and a pin hole through the slot is provided on the fixing block. The chain petals at the end of the grid chain (7) are located in the slot and are connected by a locking pin. The left end mounting beam (2) and the right end mounting beam (8) are provided with a beam groove (4). The width of the beam groove (4) is equal to the width of the end fastener (1), and the fixing block is located in the beam groove (4) and is fixedly connected by screws.

7. The anti-stubble rake head grid as described in claim 6, characterized in that: Multiple countersunk screw holes (5) are provided on the left end mounting beam (2) and the right end mounting beam (8). The left end mounting beam (2) and the right end mounting beam (8) are fixed to both sides of the rake head suction port (9) by mounting screws (3).