Cable type dredging grab bucket

Abstract

The invention relates to a rope type dredging grab bucket which comprises two bucket valves arranged in a mirror image mode, the two bucket valves can be synchronously connected in an opposite rotation mode or in a back-to-back rotation mode so that the rope type dredging grab bucket can be in a closed state and an open state, each bucket valve is provided with an opening allowing materials to enter and exit from the interior of the bucket valve, and each bucket valve comprises a main body, a bucket opening plate and bucket teeth. And a hopper cavity communicated with the opening is formed in the main body. The bucket opening plate is connected with the main body and forms a side part of the opening. The bucket teeth are installed on the side, with an upward opening, of the bucket opening plate. And when the two bucket petals rotate back to back until the openings face downwards and the bucket teeth are located below the bucket opening plate, the rope type dredging grab bucket is in an open state. And when the two bucket petals oppositely rotate until the openings of the two bucket petals are oppositely closed and the bucket teeth of the two bucket petals are staggered and meshed, the rope type dredging grab bucket is in a closed state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater operation, in particular to a cable dredging grab. BACKGROUND

[0002] The dredging grab is a special equipment for underwater dredging and salvage operation matched with a crane ship, which is suitable for river dredging, desilting and salvage operation, and is used for digging up underwater sundries such as sludge, iron sheet sand and stone blocks. Among them, the bucket is an important part of the dredging grab, in the initial state, each bucket is opened outward, the self-gravity of the dredging grab is converted into impact kinetic energy when it falls, the bucket teeth on the bucket first contact the material, the impact kinetic energy drives the bucket teeth to cut down the material, and then in the process of upward lifting, each bucket is gradually closed to shear and contain the material.

[0003] The bucket teeth of the traditional bucket are usually arranged on the lower side of the bucket lip plate, and the bucket teeth and the bucket lip plate are arranged in a staggered manner in the vertical direction when the bucket is opened outward. However, especially in heavy-duty buckets and super heavy-duty buckets, when the bucket lip plate on the bucket needs to be made of relatively thick steel, the bucket lip plate will physically block the downward cutting of the bucket teeth, increase the cutting resistance, and thus affect the operation efficiency of the dredging grab. SUMMARY

[0004] The purpose of the present application is to provide a cable dredging grab, which solves the technical problem of how to improve the operation efficiency.

[0005] To solve the above technical problems, the present application adopts the following technical solutions.

[0006] The present application provides a cable dredging grab, which comprises two mirror image arranged buckets, the two buckets are connected to rotate synchronously towards each other or away from each other, so that the cable dredging grab has a closing state and an opening state, and the bucket has an opening for the material to enter or exit the inside of the bucket, the bucket comprises: a main body, which is provided with a bucket cavity in communication with the opening; a bucket lip plate connected with the main body and forming a side of the opening; a bucket tooth installed on one side of the bucket lip plate facing upward; when the two buckets rotate away from each other to the opening facing downward, the bucket tooth is below the bucket lip plate, the cable dredging grab is in the opening state; when the two buckets rotate towards each other to the openings of the two buckets being closed, and the bucket teeth of the two buckets are staggered and engaged, the cable dredging grab is in the closing state.

[0007] In some embodiments of the present application, the bucket tooth comprises a tooth part, the tooth part is shark tooth shaped, and the cross-sectional width of the tooth part gradually decreases from the side close to the bucket lip plate to the side away from the bucket lip plate.

[0008] In some embodiments of the present application, the tooth includes a tooth portion, the tooth portion is in the shape of a T, and includes a first portion and a second portion, the first portion gradually reduces in cross-sectional width from a side of the tooth portion close to the mouth plate to a side of the tooth portion away from the mouth plate, the second portion is erected on the first portion and extends into the main body, and a first cutting edge is formed on a side of the second portion away from the first portion, and a second cutting edge is formed by a side of the second portion away from the mouth plate and a side of the first portion away from the mouth plate.

[0009] In some embodiments of the present application, the tooth includes a tooth portion, the tooth portion is in the shape of a cross, and includes a first portion and a second portion arranged in a cross shape, the first portion and the second portion gradually reduce in cross-sectional width from a side of the tooth portion close to the mouth plate to a side of the tooth portion away from the mouth plate, and a cutting edge in the shape of a quadrilateral is formed by a side of the first portion away from the mouth plate and a side of the second portion away from the mouth plate.

[0010] In some embodiments of the present application, the main body includes a first side plate, a second side plate, and a back plate, the first side plate and the second side plate are arranged opposite to each other side by side, the back plate is used to connect the first side plate and the second side plate, and forms the bucket cavity together with the first side plate and the second side plate; the mouth plate is located between the first side plate and the second side plate, and is connected with the first side plate, the second side plate, and the back plate respectively, and the edge of the first side plate, the mouth plate, and the second side plate forms the opening; the tooth is connected with a side of the mouth plate away from the back plate.

[0011] In some embodiments of the present application, a mounting groove is formed on a side of the mouth plate away from the back plate, the tooth includes a tooth portion and a mounting portion connected with the tooth portion, the mounting portion is detachably mounted in the mounting groove, so that the mouth plate and the tooth are detachably connected.

[0012] In some embodiments of the present application, the bucket further includes a connecting piece, two groups of connecting holes are formed on the mouth plate and penetrate the mounting groove, the connecting piece passes through one group of the connecting holes and the mounting portion in the mounting groove in sequence, and is locked in the other group of the connecting holes, so that the mounting portion is detachably fixed in the mounting groove.

[0013] In some embodiments of the present application, in the folded state, the main body, the mouth plate, and the tooth of the two bucket petals form a loading space.

[0014] The bucket also comprises outer teeth connected to the side of the mouth plate facing away from the bucket cavity and extending to the same side as the bucket teeth, and the outer teeth of the two bucket halves are staggered and engaged in the closed state, and located outside the loading space.

[0015] In some embodiments of the present application, the edges of the first side plates and the edges of the second side plates are respectively provided with first teeth and second teeth, and the first teeth of the two first side plates and the second teeth of the two second side plates are staggered and engaged in the closed state.

[0016] From the above technical solution, the present application has at least the following advantages and positive effects:

[0017] In the cable dredging grab of the present application, in the working state, the initial state of the cable dredging grab is the open state, and after falling vertically by gravity, the bucket teeth located below the mouth plate first contact and cut down the material layer, and the mouth plate is used to guide the material to flow from the opening to the bucket cavity. Then, the two bucket halves rotate synchronously towards each other, and in this process, as the openings of the two bucket halves gradually approach, the bucket teeth of the two bucket halves approach each other to scrape the material, so that the material is gradually gathered and enclosed in the two bucket cavities, and when the openings of the two bucket halves are closed, the two bucket cavities together form a relatively closed hopper space to wrap the excavated material, so as to ensure that the material can be stably lifted or transported to the required position in the subsequent process. In the subsequent unloading process, the two main bodies are rotated synchronously away from each other to restore the cable dredging grab to the initial open state, and the material wrapped in the grab is naturally dropped to the designated unloading position under the action of gravity. Since the mouth plate forms the side of the opening, and the bucket teeth are installed on the side of the mouth plate facing the opening, the bucket teeth and the mouth plate are vertically aligned in the open state, and specifically, after the bucket teeth penetrate the material layer, the mouth plate moves downward along the channel opened by the bucket teeth, avoiding the physical obstruction of the thick mouth plate in the traditional bucket half to the cutting of the material by the bucket teeth in heavy and super heavy bucket applications, reducing the cutting resistance, and thus improving the working efficiency of the cable dredging grab. BRIEF DESCRIPTION OF DRAWINGS

[0018] The various objects, features and advantages of the present application will become more apparent from the following detailed description of preferred embodiments of the present application, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary and are not necessarily drawn to scale. In the drawings, like reference numerals refer to like parts throughout the various views.

[0019] Wherein:

[0020] Figure 1 is a structural schematic diagram of the cable dredging grab in the open state according to an exemplary embodiment.

[0021] Figure 2 is Figure 1 a first embodiment in a folded state.

[0022] Figure 3 is Figure 1 a second embodiment in a folded state.

[0023] Figure 4 is Figure 1 a third embodiment in a folded state.

[0024] Figure 5 is Figures 2 to 4 a bottom view in one embodiment.

[0025] Figure 6 is Figure 5 a top view in one embodiment.

[0026] Figure 7 is Figure 6 a detailed structure diagram of the tines in the first embodiment.

[0027] Figure 8 is Figure 5 a top view in another embodiment.

[0028] Figure 9 is Figure 8 a detailed structure diagram of the tines in the second embodiment.

[0029] Figure 10 is Figure 8 a detailed structure diagram of the tines in the third embodiment.

[0030] Figure 11 is Figures 2 to 4 a bottom view in another embodiment.

[0031] Figure 12 is Figure 11 a top view.

[0032] Figure 13 is Figure 12 a detailed structure diagram of the tines in the fourth embodiment.

[0033] Figure 14 is Figure 12 a detailed structure diagram of the tines in the fifth embodiment.

[0034] Figure 15 is Figure 4 a perspective structure diagram.

[0035] Figure 16 is Figure 6 an exploded structure diagram of the tines and the main body.

[0036] Figure 17 is Figure 16 is a schematic view of the exploded structure from another perspective.

[0037] Reference signs are explained as follows:

[0038] 1, bucket blade; 11, opening;

[0039] 2, main body; 21, first side plate; 211, first tooth member; 22, second side plate; 221, second tooth member; 23, back plate; 24, bucket cavity;

[0040] 3, bucket lip plate; 31, mounting groove; 32, connecting hole;

[0041] 4, bucket tooth; 41, tooth portion; 411, first portion; 412, second portion; 4121, first tooth edge; 4122, second tooth edge; 4123, edge cutting; 42, mounting portion;

[0042] 5, connecting member;

[0043] 6, external tooth. DETAILED DESCRIPTION

[0044] While the application can be susceptible to embodiment in different forms, there are shown in the drawings and will be described in detail herein specific embodiments with the understanding that the present disclosure is to be considered an exemplification of the principles of the application and is not intended to limit the application to that as illustrated.

[0045] Thus, one feature that is described in the specification can be used to explain one embodiment of the application, while the same feature can be used to explain another embodiment of the application. This way, one should not use the descriptions of those features in order to limit the application to the one embodiment described in the specification. In addition, one should note that the specification describes many features. Although certain features can be combined together in order to show a possible system design, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise noted, the combinations described are not intended to be limiting.

[0046] In the embodiments shown in the drawings, the indications of direction, such as up, down, left, right, front and back, are used to explain the structure and movement of the various elements of the application are not absolute but relative. These indications are appropriate when the elements are in the position shown in the drawings. If the position of the elements is changed, the indications of direction are changed accordingly.

[0047] Reference is made to Figure 1 and Figure 2The cable dredging grab provided by the embodiment of the present application mainly comprises two mirror image setting bucket blades 1, the two bucket blades 1 are synchronously connected to rotate towards each other or away from each other, so that the cable dredging grab has a closing state and an opening state, and the bucket blade 1 has an opening 11 for material to enter or exit the inside of the bucket blade 1, the bucket blade 1 comprises a main body 2, a bucket lip plate 3 and a bucket tooth 4. The main body 2 is internally provided with a bucket cavity 24 which is communicated with the opening 11. The bucket lip plate 3 is connected with the main body 2 and forms a side part of the opening 11. The bucket tooth 4 is installed on the side of the bucket lip plate 3 which is directed upward relative to the opening 11. When the two bucket blades 1 rotate away from each other to the opening 11 being directed downward and the bucket tooth 4 is located below the bucket lip plate 3, the cable dredging grab is in the opening state. When the two bucket blades 1 rotate towards each other to the openings 11 of the two bucket blades 1 being closed and the bucket teeth 4 of the two bucket blades 1 being staggered and engaged, the cable dredging grab is in the closing state.

[0048] In the cable dredging grab of the embodiment of the present application, during work, the initial state of the cable dredging grab is the opening state, after the cable dredging grab vertically falls by relying on the self weight, the bucket tooth 4 located below the bucket lip plate 3 first contacts and cuts down the material layer, and the bucket lip plate 3 is used to guide the material to flow from the opening 11 to the bucket cavity 24. Subsequently, the two bucket blades 1 synchronously rotate towards each other, in this process, as the openings 11 of the two bucket blades 1 gradually approach, the bucket teeth 4 of the two bucket blades 1 approach each other to scrape the material, so that the material is gradually closed and surrounded in the two bucket cavities 24, when the openings 11 of the two bucket blades 1 are closed, the two bucket cavities 24 jointly form a relatively closed hopper space to wrap the excavated material in it, so as to ensure that the material can be stably lifted or transported to the required position in the subsequent process. When the material is unloaded in the subsequent process, the two main bodies 2 are synchronously rotated away from each other to restore the cable dredging grab to the initial opening state, and the material wrapped in the inside of the grab naturally falls to the designated unloading position under the action of gravity through the opening 11. Since the bucket lip plate 3 forms the side part of the opening 11 and the bucket tooth 4 is installed on the side of the bucket lip plate 3 which is directed upward relative to the opening 11, the bucket tooth 4 and the bucket lip plate 3 are vertically and oppositely distributed in the opening state, specifically, after the bucket tooth 4 penetrates the material layer, the bucket lip plate 3 moves downward along the channel opened by the bucket tooth 4, avoiding the physical blockage of the thicker bucket lip plate 3 in the traditional bucket blade 1 to the cutting of the material by the bucket tooth 4 in the application of heavy and super heavy buckets, reducing the cutting resistance, and thus improving the operation efficiency of the cable dredging grab.

[0049] It can be conceived that in the process of the physical blockage of the thicker bucket lip plate 3 in the traditional bucket blade 1 to the cutting of the material by the bucket tooth 4, the bucket lip plate 3 itself will also be worn to a certain extent, and the bucket lip plates 3 on the two bucket blades 1 will generate gaps due to wear when the grab is closed, thereby affecting the sealing performance of the grab, in the cable dredging grab of the embodiment of the present application, the staggered engagement between the bucket teeth 4 replaces the engagement between the bucket lip plates 3, thereby enhancing the sealing performance.

[0050] It is conceivable that the opening 11 can be enclosed by the bucket lip plate 3 and the main body 2, or can be enclosed by the bucket lip plate 3 itself.

[0051] Please refer to Figures 5 to 7 The embodiment discloses a bucket tooth structure, the bucket tooth 4 includes a tooth part 41, the tooth part 41 is the part of the bucket tooth 4 directly contacting the material layer, the tooth part 41 is shark tooth, the cross-sectional width of the tooth part 41 gradually reduces from the side close to the bucket lip plate 3 to the side away from the bucket lip plate 3. The bucket tooth 4 with the shark tooth tooth part 41 can be mainly applied in underwater scenes where the material layer is hard rock. Specifically, the cross-sectional width of the tooth part 41 gradually reduces from the root to the tip, and the tip is used to first contact the material layer. Through the small force area between the tip and the material layer, the pressure can be effectively increased, so that better rock cracking effect is achieved.

[0052] Please refer to Figure 5 、 Figure 8 and Figure 9 The embodiment discloses a second bucket tooth structure, the bucket tooth 4 includes a tooth part 41, the tooth part 41 is the part of the bucket tooth 4 directly contacting the material layer, the tooth part 41 is T-shaped, and includes a first part 411 and a second part 412. The cross-sectional width of the first part 411 gradually reduces from the side close to the bucket lip plate 3 to the side away from the bucket lip plate 3, the second part 412 is erected on the first part 411 and extends into the main body 2, and a first tooth edge 4121 is formed on the side of the second part 412 away from the first part 411, and a second tooth edge 4122 is formed on the side of the second part 412 away from the bucket lip plate 3 and the side of the first part 411 away from the bucket lip plate 3.

[0053] The bucket tooth 4 with the T-shaped tooth part 41 can be mainly applied in underwater scenes where the material layer is hard clay. Specifically, after the cable dredging grab falls vertically, the second tooth edge 4122 first contacts and cuts down the material layer, and the first tooth edge 4121 cooperates with the second tooth edge 4122 to reduce the resistance of cutting down compared with single blade cutting, so as to ensure the effect of cutting down. When the two bucket petals 1 are closed, the first tooth edge 4121 is used for horizontal cutting of the material layer, and at this time, the second tooth edge 4122 cooperates with the first tooth edge 4121 to ensure that the cut clay block is smoothly separated. The first part 411 provides a basic support for the second part 412, and also ensures that the bucket tooth 4 of the two bucket petals 1 can form staggered teeth in the closed state, so as to achieve a sealing effect.

[0054] Please refer to Figures 11 to 14The third tooth structure is disclosed in the embodiment. The tooth 4 includes a tooth part 41, which is a part of the tooth 4 directly contacting the material layer. The tooth part 41 is in a cross shape and includes a first part 411 and a second part 412 arranged in a cross shape. The cross-sectional width of the first part 411 and the second part 412 gradually decreases from the side of the tooth part 41 close to the mouth plate 3 to the side away from the mouth plate 3. The side of the first part 411 away from the mouth plate 3 and the side of the second part 412 away from the mouth plate 3 jointly form a cutting edge 4123 in a quadrilateral shape.

[0055] The cross-shaped tooth part 41 of the tooth 4 forms four high-stress ridges. During work, the four sharp corners of the cutting edge 4123 in the quadrilateral shape first wedge into the weak part of the medium-weathered weathered rock mass at a very high pressure. Then, the four ridges act as directional splitters to simultaneously and multi-directionally induce and expand radial cracks efficiently, fully utilizing the internal joint and fissure network of the rock mass. During the closing and lifting of the grab, the four ridges further exert shear force on the divided rock blocks to promote disintegration, and the four corners can effectively hook and tear the loosened rock blocks.

[0056] The tooth 4 realizes efficient cracking and deep penetration through extreme stress concentration and multi-point wedging, systematically disintegrates large rock blocks by using synchronous multi-directional crack propagation, and significantly improves the effective block output rate by combining tension and shear damage. The breaking process is highly adapted to the structural characteristics of weathered rock (weak cementation and many fissures), which can achieve faster, finer and more complete rock breaking with relatively smaller closing force, and significantly improves the penetration efficiency and grabbing amount of the grab in hard rock dredging.

[0057] The materials of the teeth 4 with the shark-tooth-shaped tooth part 41, the T-shaped tooth part 41 and the cross-shaped tooth part 41 are all special steel materials. The yield strength of the special steel material is 1100 MPa-1650 MPa, and the tensile strength is 1412 MPa-1940 MPa, which has the advantages of high wear resistance and high toughness. Under the same wear condition, the service life is about 10 times that of ordinary steel materials, which solves the problem that the stress concentration caused by the shape of the tooth part 41 may cause it to break during operation, thereby ensuring the service life of the cable dredging grab.

[0058] It should be noted that the tooth 4 with the shark-tooth-shaped tooth part 41 is suitable for medium-hard soil (including but not limited to consolidated clay, silty clay, medium-dense to dense silt, fine sand, loose to loose medium-coarse sand, and weakly cemented calcareous sand). The tooth 4 with the T-shaped tooth part 41 is suitable for hard soil (including but not limited to hard clay, strongly cemented clay, dense sand, gravel-containing sand layer, sand-gravel mixed layer, strongly weathered bedrock / rock debris, residual soil, and cemented calcareous shell). The tooth 4 with the cross-shaped tooth part 41 is suitable for medium-hard soil, hard soil and weathered rock (including but not limited to fully weathered bedrock, strongly weathered bedrock and medium-weathered bedrock).

[0059] Please refer to Figure 10 , Figure 13 and Figure 15 In a specific embodiment, the main body 2 comprises a first side plate 21, a second side plate 22 and a back plate 23, the first side plate 21 and the second side plate 22 are arranged opposite to each other side by side, and the back plate 23 is used to connect the first side plate 21 and the second side plate 22 and enclose the first side plate 21 and the second side plate 22 to form a bucket cavity 24. The mouth plate 3 is located between the first side plate 21 and the second side plate 22 and is connected with the first side plate 21, the second side plate 22 and the back plate 23 respectively, and the edges of the first side plate 21, the mouth plate 3 and the second side plate 22 enclose to form an opening 11. The bucket tooth 4 is connected with the side of the mouth plate 3 away from the back plate 23. This structure design makes the cable dredging grab have a reasonable space layout, ensures the overall structural strength and stability.

[0060] In other embodiments, the mouth plate 3 can be integrally formed, the integrally formed mouth plate 3 is connected with the first side plate 21, the second side plate 22 and the back plate 23 respectively, and the edges thereof form the opening 11, and the number of the mouth plate 3 can also be three, the three mouth plates 3 are connected in sequence and connected with the first side plate 21, the second side plate 22 and the back plate 23 respectively, and the edges of the three mouth plates 3 enclose to form the opening 11.

[0061] Please refer to Figure 16 and Figure 17 In a specific embodiment, the side of the mouth plate 3 away from the back plate 23 is provided with a mounting groove 31, the bucket tooth 4 further comprises a tooth part 41 and a mounting part 42 connected with the tooth part 41, and the mounting part 42 is detachably mounted in the mounting groove 31, so that the mouth plate 3 and the bucket tooth 4 are detachably connected. The bucket tooth 4 and the mouth plate 3 are connected in a detachable manner, which can replace the bucket tooth 4 after wear, or replace the bucket tooth 4 with different shapes to adapt to different working scenes to achieve better working effect, thereby reducing the cost of replacing the whole bucket 1, on the other hand, the design of the mounting groove 31 and the mounting part 42 can increase the contact area of the bucket tooth 4 and the mouth plate 3, and make the connection of the bucket tooth 4 and the mouth plate 3 more compact.

[0062] It should be noted that in other embodiments, the side of the mouth plate 3 away from the back plate 23 can be provided with a mounting part 42, and the tooth part 41 of the bucket tooth 4 is provided with a mounting groove 31.

[0063] Please refer to Figure 5 , Figure 6 , Figure 8 , Figure 16 and Figure 17In a specific embodiment, the bucket 1 further comprises a connecting member 5, two groups of connecting holes 32 are formed on the bucket lip plate 3 and pass through the mounting groove 31, the connecting member 5 passes through one group of connecting holes 32 and the mounting portion 42 located in the mounting groove 31 in sequence, and is locked in the other group of connecting holes 32, so that the mounting portion 42 is detachably fixed in the mounting groove 31, the mounting portion 42 and the mounting groove 31 are quickly and simply disassembled and assembled, the operation is facilitated, and the reliability of the connection is enhanced. Specifically, the connecting member 5 can be a rivet, a screw or the like.

[0064] Please refer to Figures 3 to 5 and Figure 10 In another specific embodiment of the present application, in the closed state, the main body 2, the bucket lip plate 3 and the bucket tooth 4 of the two bucket 1s enclose a loading space. The bucket 1 further comprises an outer tooth 6, which is connected to the side of the bucket lip plate 3 away from the bucket cavity 24 and extends to the same side as the bucket tooth 4. In the closed state, the outer teeth 6 of the two bucket 1s are staggered and located outside the loading space. Through the cooperation of the outer tooth 6 and the bucket tooth 4, multiple contact points can be formed between the bucket 1 and the material layer, improving the material breaking and grabbing efficiency, and the staggered outer teeth 6 outside the loading space can also provide another layer of protection, thereby further improving the sealing performance.

[0065] It should be noted that the pressure at the mouth of the conventional grab bucket is about 104 Pa (single side), while the pressure at the mouth of the double-toothed grab bucket is about 43750 Pa (single side), thereby greatly increasing the pressure and facilitating construction.

[0066] Please participate Figure 4 , Figure 13 and Figure 15 In yet another specific embodiment of the present application, the edges of the first side plate 21 and the edges of the second side plate 22 are respectively provided with first tooth members 211 and second tooth members 221. In the closed state, the first tooth members 211 of the two first side plates 21 between the two bucket 1s are staggered and engaged, and the second tooth members 221 of the two second side plates 22 are staggered and engaged. The arrangement of the first tooth members 211 and the second tooth members 221 can not only improve the material breaking and grabbing efficiency of the cable dredging grab bucket, but also significantly improve the sealing performance.

[0067] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive terms. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be construed broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds, are therefore intended to be embraced by the appended claims.

Claims

1. A rope dredging grab, comprising two mirror-image bucket lobes, the two bucket lobes being connected so as to be synchronously rotatable toward or away from each other, so that the rope dredging grab has a closed state and an open state, and the bucket lobes have openings for allowing material to enter and exit the bucket lobes, characterized in that: The bucket lobe includes: a main body, wherein a chamber communicating with the opening is provided therein; a bucket mouth plate connected to the main body and forming a side portion of the opening; Bucket teeth are mounted on the bucket mouth plate on the side of the opening facing upward; When the two bucket lobes rotate away from each other until the opening faces downward and the bucket teeth are located below the bucket mouth plate, the rope dredging grab is in the open state; When the two bucket lobes rotate toward each other until the openings of the two bucket lobes are aligned and the bucket teeth of the two bucket lobes are staggered and engaged, the rope dredging grab is in the closed state.

2. The rope dredging grab according to claim 1, characterized in that: The bucket tooth includes a tooth portion, which is shark-tooth-shaped. The cross-sectional width of the tooth portion gradually decreases from a side close to the bucket mouth plate to a side away from the bucket mouth plate.

3. The rope dredging grab according to claim 1, characterized in that: The bucket tooth includes a tooth portion, which is T-shaped and includes a first part and a second part. The cross-sectional width of the first part gradually decreases from the side of the tooth portion close to the bucket mouth plate to the side away from the bucket mouth plate. The second part is erected on the first part and extends into the main body. A first tooth edge is formed on the side of the second part away from the first part. A second tooth edge is formed on the side of the second part away from the bucket mouth plate and the side of the first part away from the bucket mouth plate.

4. The rope dredging grab according to claim 1, characterized in that: The bucket tooth includes a tooth portion, which is cross-shaped and includes a first part and a second part arranged in a cross shape. The cross-sectional width of the first part and the second part gradually decreases from the side of the tooth portion close to the bucket mouth plate to the side away from the bucket mouth plate, and the side of the first part away from the bucket mouth plate and the side of the second part away from the bucket mouth plate together form a quadrilateral cutting edge.

5. The rope dredging grab according to claim 1, characterized in that: The main body includes a first side panel, a second side panel and a back panel, wherein the first side panel and the second side panel are arranged side by side and opposite to each other, and the back panel is used to connect the first side panel and the second side panel and enclose the first side panel and the second side panel to form the bucket cavity; The hopper mouth plate is located between the first side plate and the second side plate, and is connected to the first side plate, the second side plate and the back plate respectively, and the edges of the first side plate, the hopper mouth plate and the second side plate enclose to form the opening; The bucket teeth are connected to a side of the bucket mouth plate away from the back plate.

6. The rope dredging grab according to claim 5, characterized in that: A mounting groove is provided on the side of the bucket mouth plate away from the back plate. The bucket tooth includes a tooth portion and a mounting portion connected to the tooth portion. The mounting portion is detachably mounted in the mounting groove so that the bucket mouth plate and the bucket tooth are detachably connected.

7. The rope dredging grab according to claim 6, characterized in that: The bucket lobe also includes a connecting piece, and two groups of connecting holes that pass through the mounting groove are opened on the bucket mouth plate. The connecting piece passes through one group of the connecting holes and the mounting part located in the mounting groove in sequence, and is locked in the other group of the connecting holes, so that the mounting part can be detachably fixed in the mounting groove.

8. The rope dredging grab according to claim 5, characterized in that: In the closed state, the main bodies, the bucket mouth plates and the bucket teeth of the two bucket lobes enclose a loading space; The bucket lobes also include external teeth, which are connected to the side of the bucket mouth plate facing away from the bucket cavity and extend to the same side as the bucket teeth. In the closed state, the external teeth of the two bucket lobes are staggered and located outside the loading space.

9. The rope dredging grab according to claim 5, characterized in that: The first and second teeth are respectively provided on the edges of the first side plate and the second side plate. In the closed state, the first teeth of the two first side plates between the two bucket lobes are staggered and meshed, and the second teeth of the two second side plates are staggered and meshed.

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