Sickle-shaped bush-hook and TPD underground diaphragm wall chain saw type cutter

Abstract

The utility model relates to the field of underground diaphragm wall construction equipment, in particular to a sickle-shaped bush-hook and a TPD underground diaphragm wall chain saw type cutter, which comprise a chain plate used for being fixedly connected to a chain saw unit. The outer cutter teeth are arranged on the two sides of the middle cutter teeth, and the rear end parts of the middle cutter teeth and the outer cutter teeth are fixed on the chain plate. The middle cutter teeth and the outer cutter teeth are sickle-shaped cutter teeth with sharp front portions and wide rear portions, the front end portions of the sickle-shaped cutter teeth are higher than the top ends of the rear end portions of the sickle-shaped cutter teeth, and supporting grooves used for supporting stones are formed in the upper ends of the middle cutter teeth and the upper ends of the outer cutter teeth. And the bracket is used for clamping stones and bringing the stones out of the cutting groove through the movement of the cutter. The scheme has the advantages that the hard stratum construction efficiency is improved, the cutter grabbing capacity is enhanced, and construction interruption and cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of equipment for diaphragm wall construction, and in particular to a sickle-shaped hook knife and a TPD diaphragm wall chainsaw-type tool. Background Technology

[0002] In the construction of diaphragm walls, the construction method for composite flexible cutoff walls of dams is called the Trenchcutting Plastic Pile-mixing Deep Wall method. This method is based on the TRD (TrenchCutting Re-mixing Deep Wall Method) and incorporates polymer cutoff boards, hence the abbreviation TPD (TPD method).

[0003] The TPD (Through-Diameter Partition) construction machine, a core piece of equipment for diaphragm wall construction, is specifically designed for high-precision and high-efficiency diaphragm wall construction. This equipment mainly consists of four parts: a chassis system, a frame, a gantry system, and a cutter assembly. The chassis system provides overall support and mobility, typically equipped with tracks or wheels to adapt to complex terrain. The frame, mounted on the chassis system, serves as the main framework of the equipment, bearing the load of the gantry system and the cutter assembly. The gantry system, fixed to the frame, guides the vertical lifting and lowering movement of the cutter assembly, ensuring the accuracy of trenching operations. The cutter assembly, guided by the gantry system, cuts and trenches the diaphragm wall; its movement stability directly determines the construction quality.

[0004] However, in construction on hard strata (such as those containing large granite or concrete blocks), traditional chainsaw cutters face significant technical bottlenecks: when encountering hard rocks or blocks with a diameter exceeding 1.5 times the cutter length, conventional cutters, due to insufficient structural strength or limited gripping ability, struggle to effectively remove the rocks from the cutting groove. Rocks remaining in the groove continuously impact the cutter, causing deformation, breakage, or even damage to the cutter head. In severe cases, construction must be interrupted, and auxiliary equipment (such as cranes or crushers) must be called in for processing, taking up to 10 hours or more, significantly impacting construction efficiency and increasing costs.

[0005] Therefore, there is an urgent need for a construction method and matching cutting tools that integrate high-strength structural design and adaptive gripping function to solve the efficiency and reliability challenges in hard rock formation construction. Existing technologies urgently need improvement to address these issues. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a sickle-shaped hook knife and a TPD (Transcontinental Dip) chain saw-type tool for underground continuous walls, which has the advantages of improving construction efficiency in hard strata, enhancing tool gripping ability, and reducing construction interruptions and costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application provides a sickle-shaped hook knife, the technical solution of which is as follows: It includes a chain plate for fixing to a chainsaw unit. A central cutting tooth and two outer cutting teeth on either side are included, with the rear ends of the central and outer cutting teeth fixed to the chain plate. Both the central and outer cutting teeth are constructed as sickle-shaped teeth, sharp at the front and wide at the rear, with the height of the front end higher than the height of the top of the rear end. A groove for supporting stones is formed at the upper end of the central and outer cutting teeth. The groove is used to hold the stone and, through the movement of the blade, to pull it out of the cutting groove.

[0009] Furthermore, this application also proposes that the upper surfaces of the middle and outer cutting teeth at the bottom of the bracket are both constructed as arc-shaped surfaces.

[0010] Furthermore, this application also proposes that the length of the intermediate cutting tooth is longer than the length of the outer cutting tooth, so that its front end is both higher than and extends beyond the front end of the outer cutting tooth.

[0011] Furthermore, this application also proposes that the arc of the middle blade tooth is greater than that of the outer blade tooth to enhance the gripping ability of loose stones.

[0012] Furthermore, this application also proposes that the chain plate has through holes, through which the fastening components can be fixed to the knife chain box.

[0013] Furthermore, this application also proposes that through holes are provided on the chain plate between the middle cutting tooth and the outer cutting teeth on both sides, and the through holes on both sides of the middle cutting tooth are arranged in a trapezoidal shape.

[0014] Furthermore, this application also proposes a TPD (Transcontinental Diaphragm Wall) chainsaw-type tool, comprising a cyclically arranged chainsaw unit, wherein at least one chainsaw unit of the chainsaw unit is equipped with the aforementioned sickle-shaped hook knife.

[0015] As can be seen from the above, the sickle-shaped hook knife and TPD diaphragm wall chainsaw-type cutter provided in this application can effectively clamp and remove large-volume stones in hard strata by constructing sickle-shaped cutting teeth and grooves with sharp front and wide back, thereby reducing construction interruptions and costs and improving construction efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a sickle-shaped hook knife provided in this application.

[0017] Figure 2 A side view of a sickle-shaped hook knife provided in this application.

[0018] Figure 3 This is a schematic diagram showing the installation state of a sickle-shaped hook knife provided in this application. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Example 1:

[0025] like Figure 1 and 2 As shown, this application proposes a sickle-shaped hook knife, including a chain plate 1 for fixing to a chainsaw unit 9. A central cutting tooth 3 and two outer cutting teeth 2 on either side are included, with their rear ends fixed to the chain plate 1. Both the central cutting tooth 3 and the outer cutting teeth 2 are constructed as sickle-shaped teeth, with the front end higher than the top of the rear end. A groove 4 for supporting stones is formed at the upper end of the central cutting tooth 3 and the outer cutting teeth 2. The groove 4 is used to hold the stone and allow the knife to move and remove it from the cutting groove. The chain plate 1 is connected to the knife chain box via a through hole 6 and a bolted component 7 to ensure the stability of the knife. The sickle-shaped design of the central cutting tooth 3 and the outer cutting tooth 2, with the front end higher than the top of the rear end forming the groove 4, guides the stone into the groove 4 during construction, effectively supporting and holding the stone. The groove 4 allows the knife to move and remove the stone from the cutting groove, solving the problem of removing large stones.

[0026] Specifically, the sickle-shaped design of the middle cutting tooth 3 and the outer cutting tooth 2, with the front end higher than the top of the rear end, forms a groove 4. This groove 4 guides the stone into the cutting groove during construction, effectively supporting and holding the stone. The cutting tool then moves the stone out of the cutting groove, solving the problem of removing large stones. Therefore, this technical solution, through the structural design of the chain plate 1, the middle cutting tooth 3, and the outer cutting tooth 2, forms the groove 4, which guides the stone into the cutting groove 4 during construction, effectively supporting and holding the stone. The cutting tool then moves the stone out of the cutting groove, solving the problem of removing large stones. Compared with existing technologies, this solution has higher structural strength and gripping ability, effectively improving construction efficiency and reliability.

[0027] Furthermore, the upper surfaces of the middle cutting tooth 3 and the outer cutting tooth 2 at the bottom of the tray 4 are both constructed as arc-shaped surfaces 5. Specifically, the design of the arc-shaped surface 5 can be achieved in various ways, such as using a circular arc, a parabola, or other continuous curve shapes. As a preferred embodiment, the radius of curvature of the arc-shaped surface 5 can be optimized according to the common shapes and sizes of stones in actual construction to ensure that the contact area between the cutting tooth and the stone is maximized. In addition, the surface of the arc-shaped surface 5 can be further smoothed to reduce the frictional resistance when in contact with the stone, thereby more effectively guiding the stone into the tray 4. This technical solution optimizes the contact surface shape between the cutting tooth and the stone by designing the upper surfaces of the middle cutting tooth 3 and the outer cutting tooth 2 at the bottom of the tray 4 as arc-shaped surfaces 5. The arc-shaped surface 5 design can guide the stone into the tray 4 on the one hand, and on the other hand, it can better fit the surface of stones of various shapes, increase the contact area, and thus improve the gripping effect of the cutting tool on the stone. This design avoids the problem of insufficient contact between the traditional flat cutting teeth and the rock, reducing the possibility of rock slippage and improving the efficiency and reliability of the cutting tool in hard strata construction. Compared with existing technologies, this solution significantly improves the tool's gripping ability and construction efficiency in hard rock formations, reducing equipment damage and construction interruptions caused by rock stagnation.

[0028] In a specific implementation, the length of the intermediate blade 3 is longer than the length of the outer blade 2, so that its front end is both higher than and extends beyond the front end of the outer blade 2. Specifically, the length of the intermediate blade 3 being longer than the outer blade 2 can be achieved in various ways. For example, the overall length of the intermediate blade 3 can be designed to be longer than the outer blade 2, or the front end of the intermediate blade 3 can extend outwards, exceeding the length of the outer blade 2. Furthermore, the front end of the intermediate blade 3 being higher than the front end of the outer blade 2 can be achieved by adjusting the installation angle or height of the blades. As a preferred embodiment, the front end of the intermediate blade 3 can be designed to be inclined outwards to further enhance its gripping effect. This technical solution enhances the gripping effect by increasing the length of the intermediate blade 3, allowing it to make deeper contact with the stone when gripping it. Simultaneously, the front end of the intermediate blade 3 being higher than the front end of the outer blade 2 helps to better secure the stone during the gripping process, preventing the stone from slipping. This design allows the middle cutting tooth 3 and the outer cutting tooth 2 to work together more effectively when gripping stones, making it easier to trap the stones within the cutting teeth. Compared with existing technologies, this solution significantly improves the gripping ability of the cutting tool in hard strata, reduces tool damage and construction interruptions caused by stones getting stuck, and improves construction efficiency and reliability.

[0029] Furthermore, the curvature of the middle blade 3 is greater than that of the outer blade 2 to enhance the gripping ability on loose stones. Specifically, the curvature design of the middle blade 3 can be achieved in various ways. For example, the radius of curvature of the middle blade 3 can be set to be smaller than that of the outer blade 2, or the curvature of the middle blade 3 can be set to be greater than that of the outer blade 2. In addition, the shape of the curvature of the middle blade 3 can be designed as parabolic, elliptical, or other suitable curved shapes to better conform to the surface of the loose stone. As a preferred embodiment, the curvature of the middle blade 3 can be designed to match the surface shape of the loose stone, thereby providing a larger contact area and friction during gripping. Therefore, the design of the middle blade 3 having a greater curvature than the outer blade 2 enhances the gripping ability by increasing the curvature of the middle blade 3, allowing it to better conform to the stone surface when gripping loose stones. This design allows the blade to more effectively catch and remove loose stones from the cutting groove, solving the problem of traditional blades' poor performance in gripping loose stones. Compared with existing technologies, the technical solution of this application has higher efficiency and reliability in gripping loose stones, reduces blade wear and damage, and improves construction efficiency.

[0030] like Figure 1 As shown, the chain plate 1 has through holes 6, through which fastening components 7 pass to secure it to the tool chain box. The through holes 6 on the chain plate 1 can be designed as circular, elliptical, or other suitable shapes to accommodate different sizes of fastening components 7. The diameter and number of through holes 6 can be adjusted according to the size of the chain plate 1 and the required fixing strength. The fastening components 7 can be bolts, screws, or other fasteners, which, by passing through the through holes 6 and engaging with corresponding holes on the tool chain box, secure the chain plate 1. Furthermore, the through holes 6 can be distributed at the edges or center of the chain plate 1 to ensure uniform stress distribution and avoid localized stress concentration. By constructing through holes 6, the chain plate 1 allows the fastening components 7 to pass through, thus firmly fixing the chain plate 1 to the tool chain box. This design ensures a stable connection between the chain plate 1 and the tool chain box, improving the overall stability and durability of the tool. In this way, the chain plate 1 remains fixed during tool use, preventing loosening from affecting tool performance and construction efficiency. Furthermore, it allows for easy assembly and disassembly, facilitating quick operation. Compared to existing technologies, this solution achieves efficient fixing through a simple structural design, while reducing the difficulty of maintenance and replacement, and improving the flexibility and efficiency of construction.

[0031] Furthermore, through holes 6 are provided on the chain plate 1 between the central cutting tooth 3 and the outer cutting teeth 2 on both sides, and the through holes 6 on both sides of the central cutting tooth 3 are arranged in a trapezoidal shape. The trapezoidal arrangement of the through holes 6 can better distribute the stress, enhance the overall structural strength of the chain plate 1, and thus improve the stability and service life of the cutting tool. Specifically, the trapezoidal arrangement of the through holes 6 can be achieved by symmetrically distributing the through holes 6 on the chain plate 1 along the axis of the central cutting tooth 3. This arrangement makes the distribution of the through holes 6 on the chain plate 1 more uniform, effectively dispersing the stress generated by the cutting tool during operation and avoiding stress concentration that could lead to deformation or breakage of the chain plate 1. In addition, the trapezoidal arrangement of the through holes 6 can be further optimized by adjusting the angle and size of the trapezoid to adapt to the needs of different working environments.

[0032] As a preferred embodiment, the trapezoidal arrangement of through holes 6 can be precisely manufactured using CNC machining technology to ensure that the position and shape of the through holes 6 meet the design requirements. Simultaneously, the edges of the through holes 6 can be chamfered to reduce stress concentration and further improve the durability of the chain plate 1. In this regard, the trapezoidal arrangement of through holes 6 optimizes the arrangement of the through holes 6, making the tool more stable during installation and reducing installation instability caused by improper arrangement of the through holes 6. The trapezoidal arrangement of through holes 6 can better distribute the force, enhancing the overall structural strength of the chain plate 1, thereby improving the stability and service life of the tool. Compared with existing technologies, this design, by optimizing the arrangement of the through holes 6, solves the technical problem of unstable tool installation caused by improper arrangement of through holes 6 on the chain plate 1, demonstrating significant practicality and innovation.

[0033] Example 2:

[0034] like Figure 3 As shown, this embodiment also proposes a TPD underground continuous wall chainsaw cutter, including a cyclically arranged chainsaw piece 8, and at least one chainsaw unit 9 of the chainsaw piece 8 is equipped with a sickle-shaped hook knife, which adopts the scheme described in Embodiment 1.

[0035] This application utilizes a sickle-shaped hook blade mounted on the chainsaw unit 9. Its sharp, wide-set teeth and groove 4 effectively grip and remove large stones. This design enhances the blade's gripping ability in hard strata, solving the problem of traditional blades being unable to remove stones due to insufficient structural strength or limited gripping capacity. The installation of the sickle-shaped hook blade allows the TPD diaphragm wall chainsaw to remove large stones more efficiently, thereby improving construction efficiency and reducing costs.

[0036] During normal TPD construction, when encountering uncrushable stones, small stones are carried out of the cutting groove by the teeth of ordinary cutting tools and placed in another location by a stone collection device. However, if encountering large stones with a diameter greater than 1.5 times the length of the cutting tool, due to their difficulty in breaking, the upward force of the cutting tool causes the stone to loosen and fall from the surrounding soil layer. Because of their large size, ordinary cutting tools cannot carry them out of the cutting groove, causing them to continuously impact the cutting tool, damaging or deforming the teeth. This also causes the equipment to vibrate continuously, affecting normal construction.

[0037] When the above situation occurs, the cutting force exceeds the set value. Based on the measured value, determine the size of the stone and select a suitable sickle-shaped hook. The retracting hydraulic cylinder retracts a distance equal to the length of the hook blade's teeth. The sickle-shaped hook is installed on the cutting chain. The cutting chain is slowly rotated, and the retracting hydraulic cylinder moves slowly forward until the stone is carried out of the cutting groove.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A sickle-shaped hook knife, characterized in that, include: - Chain plate (1), used to be fixed to the chainsaw unit (9); - The middle cutting tooth (3) and the outer cutting teeth (2) on both sides, the rear ends of the middle cutting tooth (3) and the outer cutting teeth (2) are fixed on the chain plate (1); - The middle blade (3) and the outer blade (2) are both constructed as sickle-shaped blades that are sharp at the front and wide at the back, and the height of the front end is higher than the height of the top of the rear end. A groove (4) for supporting the stone is formed at the upper end of the middle blade (3) and the outer blade (2). - The slot (4) is used to hold the stone and move it out of the cutting slot by the movement of the tool.

2. The sickle-shaped hook knife according to claim 1, characterized in that, The upper surfaces of the middle cutting tooth (3) and the outer cutting tooth (2) at the bottom of the bracket (4) are both constructed as arc-shaped surfaces (5).

3. The sickle-shaped hook knife according to claim 2, characterized in that, The length of the intermediate cutting tooth (3) is longer than the length of the outer cutting tooth (2), so that its front end is both higher than and extends beyond the front end of the outer cutting tooth (2).

4. The sickle-shaped hook knife according to claim 3, characterized in that: The arc of the middle blade (3) is greater than that of the outer blade (2) to enhance the gripping ability of loose stones.

5. The sickle-shaped hook knife according to claim 1, characterized in that, The chain plate (1) has through holes (6), and the fastening component (7) passes through the through holes (6) of the chain plate (1) to fix it to the knife chain box.

6. The sickle-shaped hook knife according to claim 5, characterized in that, Through holes (6) are provided on the chain plate (1) between the middle cutting tooth (3) and the outer cutting teeth (2) on both sides, and the through holes (6) on both sides of the middle cutting tooth (3) are arranged in a trapezoidal shape.

7. A TPD (Transcontinental Diaphragm Wall) chainsaw-type cutter, comprising cyclically arranged chainsaw segments (8), characterized in that, At least one chainsaw unit (9) of the chainsaw component (8) is equipped with a sickle-shaped hook knife as described in any one of claims 1-6.

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