Rake head grid for preventing timber piles

Abstract

The invention 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 invention provides a rake head grating capable of preventing timber piles. The problems that the timber piles are prone to being blocked, and the timber piles are not easy to clean after being blocked are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of trailing suction dredger facilities, and in particular relates to a wood pile-proof drag head grille. Background Art

[0002] The drag head device of the drag suction dredger is towed and moved by the construction vessel during underwater drag suction construction. The rake teeth on the drag head have a crushing effect on the mud surface below. The drag head is also equipped with a mud pump. Under the action of the mud pump, the crushed bottom mud is mixed with water and pumped into the suction port, and transferred along the pipeline to the mud tank of the drag suction dredger. In order to prevent large pieces of stone, wood piles, etc. from entering the suction port and causing pipe and pump blockage problems, it is usually necessary to install a grid on the suction port of the drag head. The grid is used to reduce the aperture of the suction port, and the stone, wood piles, etc. with a size larger than the grid aperture are trapped outside.

[0003] However, the grille of the aforementioned structure usually has a better effect on rigid stone blocks, but is still prone to clogging problems for wooden piles with a certain degree of flexibility. The reason is that in order to ensure the permeability of mud, the aperture size of the grille cannot be too small, which causes the wooden piles to be sucked in and stuck on the grille. On the other hand, the aforementioned grille is a fixed grille. When wooden piles are stuck in the grille, it is very difficult to clean. The cleaning work is time-consuming and laborious, which causes the ship's hourly rate to be significantly affected. In summary, it is necessary to develop and design a new type of anti-wood pile rake head grille to solve the problem of easy jamming of wooden piles and difficulty in cleaning after wooden piles are jammed. Summary of the invention

[0004] The purpose of the present invention is to provide a wood pile prevention rake head grille to solve the problem that wood piles are easily stuck and it is difficult to clean after being stuck.

[0005] The technical solution adopted by the present invention is: an anti-wood pile rake head grille, including a hard grille installed on the rake head suction port and a flexible grille installed on the outside of the hard grille; the hard grille is welded by multiple transverse grille plates and longitudinal grille plates; the flexible grille includes a left-end mounting beam and a right-end mounting beam detachably mounted on both sides of the rake head suction port, and multiple horizontal grille chains are arranged between the left-end mounting beam and the right-end mounting beam, the left end of the grille chain is detachably connected to the left-end mounting beam by an end fixing piece, the right end of the grille chain is detachably connected to the right-end mounting beam by an end fixing piece, and the middle part of the grille chain is detachably connected to the longitudinal grille plates by a middle fixing piece.

[0006] Preferably, the middle fixing member includes a base which is detachably connected to the longitudinal grille plate, and two opposite connecting seats with pin holes are provided in the middle of the base, and the chain petals of the grille chain are located between the two connecting seats and are connected by pin shafts; a detachable protective end cover is also installed on the base, and a conical protrusion is provided on the outside of the protective end cover.

[0007] Preferably, an inner receiving groove for accommodating the chain petals is provided inside the protective end cover, and a base receiving groove for accommodating the chain petals is provided in the middle of the base; an end cover side groove for accommodating the chain petals is provided on the edge of the protective end cover, and a base side groove for accommodating the chain petals is provided on the edge of the base.

[0008] Preferably, a left support plate and a right support plate are respectively provided on both sides of the bottom of the base and the longitudinal grille plate is located therebetween, a plurality of groups of adjustment holes are provided on the left support plate and the right support plate, an assembly hole is provided on the longitudinal grille plate, and the middle fixing part is fixedly connected to the longitudinal grille plate by means of an adjusting bolt passing through the assembly hole and one of the groups of adjustment holes.

[0009] Preferably, threaded holes are provided at the four corners of the base, and connecting holes are provided at the four corners of the protective end cover, and the protective end cover is fixedly connected to the base by assembly screws located in the threaded holes and the connecting holes.

[0010] Preferably, the end fixing piece comprises a fixing block with a slot, and a pin hole passing through the slot is also provided on the fixing block, and the chain petals at the ends of the grille chain are located in the slots and are connected by locking pins; beam grooves are provided on the left end mounting beam and the right end mounting beam, and the width of the beam groove is equal to the width of the end fixing piece, and the fixing block is located in the beam groove and is fixedly connected by screws.

[0011] Preferably, a plurality of countersunk screw holes are respectively provided 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 fixed on both sides of the suction port of the rake head by using mounting screws.

[0012] The advantages and positive effects of the present invention are:

[0013] The present invention provides a wood pile prevention rake head grille. Compared with the existing rake head grille, the rake head grille in the present invention is composed of an inner hard grille and an outer flexible grille. The flexible grille further reduces the aperture size of the hard grille, so that the blocks and wood piles in the mud can be further intercepted. Since the main part of the flexible grille is a plurality of horizontal grille chains, and the chain petals of the grille chains are hollow, the provision of the flexible grille does not significantly reduce the passing rate of the mud at the rake head suction port. After the aperture size is reduced, the rake head grille has a better interception effect on the wood piles, which can effectively solve the problem of the rake head grille blocking the wood piles.

[0014] On the other hand, since the ends of the grille chain of the outer flexible grille are detachably connected to the left and right mounting beams, and the middle part adopts a detachably connected structure with the middle fixing member and the longitudinal grille plate, even if the rake head grille is blocked by a wooden pile, the problem of the wooden pile blocking can be quickly solved by removing the grille chain, so the rake head grille also solves the problem of the difficulty in cleaning after the wooden pile is blocked. In addition, the outer flexible grille of the rake head grille is an integrally detachable structure, and only the hard grille is retained on the rake head suction port after disassembly, which is flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a main structural schematic diagram of the present invention;

[0016] Figure 2 yes Figure 1 A schematic diagram of the main structure of the middle fixing member;

[0017] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at the AA position.

[0018] In the figure:

[0019] 1. End fixings; 2. Left end mounting beam; 3. Mounting screws; 4. Grooves on beam; 5. Countersunk screw holes; 6. Middle fixings; 6-1. Base; 6-2. Protective end cover; 6-3. Assembly screws; 6-4. Pin shaft; 6-5. Receiving groove in cover; 6-6. Connecting seat; 6-7. Side groove of end cover; 6-8. Side groove of base; 6-9. Receiving groove in base; 6-10. Adjustment hole; 6-11. Left support plate; 6-12. Right support plate; 7. Grille chain; 8. Right end mounting beam; 9. Suction port of rake head; 10. Longitudinal grille plate; 11. Transverse grille plate; 12. Adjustment bolts. DETAILED DESCRIPTION

[0020] In order to further understand the content, features and effects of the present invention, the following embodiments are given to explain in detail.

[0021] See also Figure 1 The anti-wood pile rake head grille of the present invention comprises a hard grille installed on the rake head suction port 9 and a flexible grille installed outside the hard grille. Therefore, the rake head grille has an inner and outer double-layer grille structure, wherein the outer flexible grille further reduces the through-aperture size of the inner hard grille, further intercepts the lumps and wood piles in the mud, and especially avoids the problem that large-sized wood piles are stuck on the hard grille and are difficult to clean.

[0022] The hard grating is welded together by multiple transverse grating plates 11 and longitudinal grating plates 10. Specifically: the left end of the transverse grating plate 11 is welded and fixed to the left inner wall of the drag head suction port 9, and the right end is welded and fixed to the right inner wall of the drag head suction port 9. The upper end of the longitudinal grating plate 10 is welded and fixed to the top inner wall of the drag head suction port 9, and the lower end is welded and fixed to the bottom inner wall of the drag head suction port 9. Each transverse grating plate 11 is welded and fixed to each longitudinal grating plate 10 at the intersection position.

[0023] The flexible grating includes a left-end mounting beam 2 and a right-end mounting beam 8 which are detachably mounted on both sides of a suction port 9 of a rake head, and a plurality of transverse grating chains 7 are provided between the left-end mounting beam 2 and the right-end mounting beam 8. The left end of the grating chain 7 is detachably connected to the left-end mounting beam 2 by an end fixing member 1, and the right end of the grating chain 7 is detachably connected to the right-end mounting beam 8 by an end fixing member 1. The middle part of the grating chain 7 is detachably connected to the longitudinal grating plates 10 by a middle fixing member 6.

[0024] It can be seen that the outer flexible grille can be disassembled from the suction port 9 of the drag head as a whole. After the flexible grille is disassembled, only the hard grille remains on the suction port 9 of the drag head. Therefore, in actual construction, it is possible to choose whether to install the outer flexible grille according to needs, which is flexible to use. On the other hand, each grille chain 7 can also be disassembled and assembled separately.

[0025] In this embodiment, a plurality of countersunk screw holes 5 are respectively 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 mounted and fixed on both sides of the suction port 9 of the rake head by using mounting screws 3 located in the countersunk screw holes 5. This allows the left-end mounting beam 2 and the right-end mounting beam 8 to be disassembled and assembled. The advantage of placing the mounting screws 3 in the countersunk screw holes 5 is that the problem of bumps and wear of the mounting screws 3 is reduced to a certain extent.

[0026] In this embodiment, the end fixing member 1 includes a fixing block with a notch, and a pin hole penetrating the notch is provided on the fixing block. The chain petals at the end of the grille chain 7 are located in the notch and connected by a locking pin; a beam groove 4 is provided on the left end mounting beam 2 and the right end mounting beam 8, and the width of the beam groove 4 is equal to the width of the end fixing member 1, and the fixing block is located in the beam groove 4 and fixedly connected by screws. By allowing the end fixing member 1 to fall into the beam groove 4, the bump and wear problems it suffers can be reduced to a certain extent. The locking pin is inserted into the pin hole on the fixing block to fix the chain petals at the end of the grille chain 7. Since the width of the beam groove 4 is equal to the width of the end fixing member 1, when the fixing block is fixed to the beam groove 4 by screws, the locking pin cannot fall out by itself.

[0027] See also Figure 2 and Figure 3 , we can see that:

[0028] The middle fixing member 6 includes a base 6-1 that is detachably connected to the longitudinal grille plate 10. Two opposite connecting seats 6-6 with pin holes are provided in the middle of the base 6-1. The chain petals of the grille chain 7 are located between the two connecting seats 6-6 and connected by a pin shaft 6-4. A detachable protective end cover 6-2 is also installed on the base 6-1. A conical protrusion is provided on the outside of the protective end cover 6-2. The functions of the protective end cover 6-2 are: first, to provide protection for the internal connecting seat 6-6, lock pin and chain petals to avoid direct impact of sand and gravel; second, after the protective end cover 6-2 is installed, the pin shaft 6-4 is restricted so that it cannot fall out by itself; third, the conical protrusion arranged on the outside plays a certain role in guiding the sand and gravel in the mud to the surroundings, thereby reducing the impact and wear on the middle fixing member 6.

[0029] In this embodiment, threaded holes are provided at the four corners of the base 6-1, and connecting holes are provided at the four corners of the protective end cover 6-2. The protective end cover 6-2 is fixedly connected to the base 6-1 using assembly screws 6-3 located in the threaded holes and the connecting holes.

[0030] In this embodiment, a cover inner receiving groove 6-5 for receiving the chain petals is provided inside the protective end cover 6-2, and a base receiving groove 6-9 for receiving the chain petals is provided in the middle of the top of the base 6-1; an end cover side groove 6-7 for receiving the chain petals is provided at the edge of the protective end cover 6-2, and a base side groove 6-8 for receiving the chain petals is provided at the edge of the base 6-1. The purpose of providing the aforementioned cover inner receiving groove 6-5, base receiving groove 6-9, end cover side groove 6-7 and base side groove 6-8 is to enable the middle fixing member 6 to have a better clamping and fixing effect on the chain petals of the grille chain 7.

[0031] In this embodiment, a left support plate 6-11 and a right support plate 6-12 are respectively provided on both sides of the bottom of the base 6-1, and a longitudinal grid plate 10 is located between the two. A plurality of adjustment holes 6-10 are provided on the left support plate 6-11 and the right support plate 6-12, and an assembly hole is provided on the longitudinal grid plate 10. The middle fixing member 6 is fixedly connected to the longitudinal grid plate 10 by an adjustment bolt 12 that passes through the assembly hole and one of the adjustment holes 6-10. In this way, by locating the adjustment bolt 12 in the adjustment holes 6-10 at different positions, the relative position of the middle fixing member 6 and the longitudinal grid plate 10 can be adjusted along the depth direction of the suction port 9 of the rake head, so as to appropriately loosen or tighten the grid chain 7.

Claims

1. A wood pile anti-rake head grille, characterized by: The invention comprises a hard grille installed on a suction port (9) of a drag head and a flexible grille installed outside the hard grille; the hard grille is formed by welding a plurality of transverse grille plates (11) and longitudinal grille plates (10); the flexible grille comprises a left end mounting beam (2) and a right end mounting beam (8) which are detachably mounted on both sides of the suction port (9) of the drag head; a plurality of transverse grille chains (7) are arranged between the left end mounting beam (2) and the right end mounting beam (8); the left end of the grille chain (7) is detachably connected to the left end mounting beam (2) by an end fixing piece (1); the right end of the grille chain (7) is detachably connected to the right end mounting beam (8) by an end fixing piece (1); the middle part of the grille chain (7) is detachably connected to each longitudinal grille plate (10) by a middle fixing piece (6).

2. The anti-wood pile rake head grille according to claim 1, characterized in that: The middle fixing member (6) comprises a base (6-1) detachably connected to the longitudinal grille plate (10); two opposite connecting seats (6-6) with pin holes are arranged in the middle of the base (6-1); the chain petals of the grille chain (7) are located between the two connecting seats (6-6) and connected by a pin shaft (6-4); a detachable protective end cover (6-2) is also installed on the base (6-1); and a conical protrusion is arranged on the outside of the protective end cover (6-2).

3. The anti-wood pile rake head grille according to claim 2, characterized in that: An inner cover receiving groove (6-5) for receiving the chain petals is provided inside the protective end cover (6-2), and a base receiving groove (6-9) for receiving the chain petals is provided in the middle of the base (6-1); an end cover side groove (6-7) for receiving the chain petals is provided at the edge of the protective end cover (6-2), and a base side groove (6-8) for receiving the chain petals is provided at the edge of the base (6-1).

4. The anti-wood pile rake head grille according to claim 3, characterized in that: A left support plate (6-11) and a right support plate (6-12) are respectively provided on both sides of the bottom of the base (6-1), and the longitudinal grid plate (10) is located between the two. A plurality of groups of adjustment holes (6-10) are provided on the left support plate (6-11) and the right support plate (6-12), and an assembly hole is provided on the longitudinal grid plate (10). The middle fixing member (6) is fixedly connected to the longitudinal grid plate (10) by an adjustment bolt (12) that penetrates through the assembly hole and one group of the adjustment holes (6-10).

5. The anti-wood pile rake head grille according to claim 4, characterized in that: The base (6-1) is provided with threaded holes at four corners, the protective end cover (6-2) is provided with connecting holes at four corners, and the protective end cover (6-2) is fixedly connected to the base (6-1) by assembly screws (6-3) located in the threaded holes and the connecting holes.

6. The anti-wood pile rake head grille according to claim 5, characterized in that: The end fixing piece (1) comprises a fixing block with a notch, and a pin hole penetrating the notch is also provided on the fixing block, and the chain petals at the ends of the grille chain (7) are located in the notch and connected by a locking pin; a beam groove (4) is provided on the left end mounting beam (2) and the right end mounting beam (8), and the width of the beam groove (4) is equal to the width of the end fixing piece (1); the fixing block is located in the beam groove (4) and fixedly connected by screws.

7. The anti-wood pile rake head grille according to claim 6, characterized in that: A plurality of countersunk screw holes (5) are respectively 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 suction port (9) of the rake head by means of mounting screws (3).

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