A pulley support mechanism for a shield machine cable

Abstract

The utility model relates to a kind of pulley support mechanism for shield machine cable, involve cable stay construction field.It includes: pulley: including support camber, support camber top is used to place cable;Support component: pulley rotation connection the support component, for providing the rolling friction of pulley to cable when cable pulling;External component: suspension installation is in cable bridge frame.The utility model provides a kind of pulley support mechanism with simple structure, easy to install, can effectively reduce the frictional resistance when cable moves, and ensure its stable operation in narrow construction environment, to reduce artificial cost and improve laying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cable pulling construction, specifically to a pulley support mechanism for tunnel boring machine cables. Background Technology

[0002] During shield tunnel construction, the shield machine, as the core component, consumes a huge amount of energy during operation. A cable capable of transmitting high-power electricity needs to be laid to continuously supply power to the shield machine. Such cables are generally very thick. When the shield machine moves forward, the cable is easily damaged due to the huge friction. Therefore, a large amount of manpower is required to lay and adjust the cable to avoid damage. However, in the narrow tunnel space, this can easily cause construction chaos and even serious safety accidents. At the same time, the large amount of manpower will also increase construction costs.

[0003] In response to the problems of high frictional resistance, high labor costs, and low construction efficiency during cable laying in shield tunnel construction, there is an urgent need to provide a support mechanism that is simple in structure and easy to install. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a pulley support mechanism that is simple in structure and easy to install. It can effectively reduce the frictional resistance when the cable moves and ensure its stable operation in confined construction environments, thereby reducing labor costs and improving laying efficiency.

[0005] The technical solution of this utility model is as follows: A pulley support mechanism for a tunnel boring machine cable includes: Pulley: Includes a supporting curved surface, with cables placed on top of the supporting curved surface; Support assembly: The support assembly is rotatably connected to both sides of the pulley to provide rolling friction between the pulley and the cable when the cable is pulled; External components: suspended on the cable tray.

[0006] By combining pulleys and support components, lateral stability support for the pulled cable and rolling friction structure of the pulley on the cable are achieved, which greatly reduces the frictional resistance when the cable moves, making long-distance cable laying more labor-saving and efficient. The external components provide a quick suspension function, which allows the pulley to be easily fixed on the cable tray. This structure is particularly suitable for space-constrained environments such as shield tunnels. No additional tools are required during installation, which significantly improves construction efficiency and reduces installation difficulty.

[0007] Specifically, the pulley includes a cylinder and mounting plates located on both sides of the cylinder. The cylinder and the mounting plates form an I-beam structure, and a first rotating hole is provided inside the cylinder. The support assembly includes an integrally formed side plate and a bottom plate. A rotating space for accommodating the pulley is formed between the two side plates and the bottom plate. A second rotating hole corresponding to the first rotating hole is provided in the middle of the side plate.

[0008] Preferably, the first rotating hole and the second rotating hole are the same size, and a vibration gap is provided between the outer side of the pulley and the inner side of the first rotating hole and the second rotating hole.

[0009] According to the above-described scheme, the vibration gap allows the mechanism to have a small displacement space when bearing cable load, which avoids wear caused by rigid friction and absorbs vibration energy during construction, significantly improving the durability of rotating parts.

[0010] Preferably, the support assembly includes a base plate installed below the two side plates, the base plate being integrally formed with the two side plates.

[0011] Preferably, a rolling bearing is provided between the second rotating hole and the connecting assembly.

[0012] Preferably, the external component includes a horizontally arranged extension plate and a downwardly arranged fixing plate on one side of the extension plate.

[0013] According to the above-described solution, the extension plate and fixing plate design of the external component provide a quick suspension function, enabling the pulley to be easily fixed on the cable tray. This structure is particularly suitable for space-constrained environments such as shield tunnels, and requires no additional tools during installation, significantly improving construction efficiency and reducing installation difficulty.

[0014] Preferably, the mounting plate has a circular structure, with the cylinder having a first diameter and the circular structure having a second diameter, the first diameter being 1 / 3 to 2 / 3 of the second diameter.

[0015] According to the above-mentioned scheme, the optimized diameter ratio of 1 / 3 to 2 / 3 ensures that the H-beam structure maintains sufficient support strength while keeping the structure lightweight. The design of the circular mounting plate provides space for the cable movement above the H-beam structure when it is pulled, thus avoiding the risk of cable detachment.

[0016] Preferably, the diameter of the mounting plate is 3 / 5 to 7 / 8 of the height of the side plate.

[0017] According to the above-described scheme, the specific ratio of the mounting plate diameter to the side plate height (3 / 5-7 / 8) ensures that the mounting plates on both sides and the side plates of the support assembly maintain a reasonable gap when the cylinder (first diameter) rotates, thus avoiding excessive friction and preventing swaying. This dimensional fit allows the I-beam structure mounting plate to completely cover the stress area of ​​the support assembly side plate, forming a stable torque transmission path under cable load. It is particularly suitable for tunnel boring machine cable laying scenarios. When the cable moves on the cylinder, this ratio can effectively disperse lateral forces, prevent the support assembly from deforming due to excessive force on one side, and ensure the smooth dragging of tens of meters of cable.

[0018] Preferably, a support platform is provided above the base plate. The support platform is installed below the I-beam structure. An arc-shaped surface corresponding to the side of the cylinder is provided above the support platform. The arc-shaped surface and the connecting components jointly support the rotational connection of the pulley.

[0019] According to the above-mentioned design, the close fit between the arc-shaped surface of the support platform and the cylinder forms a double support structure: the connecting component undertakes the main rotation function, and the arc-shaped surface provides auxiliary support, making the cable movement more stable, which is especially suitable for laying large-diameter cables in the turning section.

[0020] Furthermore, the cylinder is provided with several branching protrusions, and the support platform has several branching grooves corresponding to the support protrusions to form multiple branching intervals.

[0021] According to the above-mentioned scheme, the cooperation between the branching protrusion and the groove forms 2 to 3 independent branching sections on a single pulley, which can simultaneously support cables of different specifications such as power cables and control cables, realizing the synchronous laying of multiple types of cables in the tunnel boring machine. The width and depth of each branching section are further differentiated according to the cable diameter to ensure that the cables do not fall out of the groove or interfere with each other when moving. For example, the height of the protrusion is 1.2 to 1.5 times the cable diameter. The cables with different functions are placed in each branching section, avoiding the cable entanglement problem caused by traditional single-groove pulleys. In particular, the synergistic effect with the arc surface of the support platform allows multiple cables to maintain a stable relative position in the turning section, which is particularly suitable for the cable laying requirements of the curved section of the shield tunnel.

[0022] Furthermore, a rotating groove and a rolling cylinder rotatably connected to the rotating groove are provided below the support platform, and the rolling cylinder and the dividing line protrusion are arranged alternately.

[0023] According to the above-described scheme, the interlaced arrangement of the rolling cylinder and the branching protrusions forms a three-dimensional friction reduction system: the upper branching structure prevents cable interference, and the lower rolling structure reduces the rolling friction of the pulley, thereby reducing the overall operating resistance of the mechanism.

[0024] Furthermore, at least one positioning recess is provided below the support platform, and at least one positioning protrusion is provided on the base plate, so that the support platform is separately fixed between the pulley and the support assembly.

[0025] According to the above-described solution, this utility model allows for flexible assembly of the support platform as an optional component through the interlocking of the positioning protrusions and recesses. Users can choose whether to install it based on their actual needs, achieving two configuration options: a basic version (without a support platform) and an enhanced version (with a support platform). Manufacturers can sell the support platform as an independent accessory, and users can purchase it in batches according to the progress of construction, reducing initial investment costs. During actual construction, the support platform can be disassembled to simplify the structure when laying in straight sections, and can be quickly installed to enhance stability in turning sections or under heavy load conditions, adapting to the differentiated needs of different sections in shield tunneling construction. Furthermore, the convex-concave mating structure ensures automatic alignment of the support platform during installation, such as controlling the gap between its arc surface and the cylinder within the range of 2-3mm, ensuring rotational freedom while avoiding misalignment and friction. When a single support platform is damaged, it can be replaced independently without the need for overall scrapping, reducing maintenance costs.

[0026] Furthermore, the support platform includes an arc-shaped trapezoidal structure located above it, the side plates of which have an inclination of 30-70°.

[0027] According to the above-mentioned scheme, the trapezoidal slope of 30-70 degrees, combined with the arc-shaped top surface, forms the optimal force transmission path: the slope ensures the stability of the support platform, and the arc-shaped surface evenly distributes the cable pressure, so that the mechanism can still maintain smooth rotation under heavy load conditions.

[0028] Preferably, the mounting plate has a circular structure, with the cylinder having a first diameter and the circular structure having a second diameter, the first diameter being 1 / 3 to 2 / 3 of the second diameter.

[0029] According to the above-mentioned scheme, the optimized diameter ratio of 1 / 3 to 2 / 3 ensures that the H-beam structure maintains sufficient support strength while keeping the structure lightweight. The design of the circular mounting plate provides cable movement space above the H-beam structure in the pulling state on both sides, avoiding the risk of cable detachment.

[0030] Preferably, the first rotating hole and the second rotating hole are the same size, and a vibration gap is provided between the outer side of the pulley and the inner side of the first rotating hole and the second rotating hole.

[0031] According to the above-described scheme, the vibration gap allows the mechanism to have a small displacement space when bearing cable load, which avoids wear caused by rigid friction and absorbs vibration energy during construction, significantly improving the durability of rotating parts.

[0032] Preferably, the diameter of the mounting plate is 3 / 5 to 7 / 8 of the height of the side plate.

[0033] According to the above-described scheme, the specific ratio of the mounting plate diameter to the side plate height (3 / 5-7 / 8) ensures that the mounting plates on both sides and the side plates of the support assembly maintain a reasonable gap when the cylinder (first diameter) rotates, thus avoiding excessive friction and preventing swaying. This dimensional fit allows the I-beam structure mounting plate to completely cover the stress area of ​​the support assembly side plate, forming a stable torque transmission path under cable load. It is particularly suitable for tunnel boring machine cable laying scenarios. When the cable moves on the cylinder, this ratio can effectively disperse lateral forces, prevent the support assembly from deforming due to excessive force on one side, and ensure the smooth dragging of tens of meters of cable.

[0034] Preferably, a support platform is provided above the base plate. The support platform is installed below the I-beam structure. An arc-shaped surface corresponding to the side of the cylinder is provided above the support platform. The arc-shaped surface and the connecting components jointly support the rotational connection of the pulley.

[0035] According to the above-mentioned design, the close fit between the arc-shaped surface of the support platform and the cylinder forms a double support structure: the connecting component undertakes the main rotation function, and the arc-shaped surface provides auxiliary support, making the cable movement more stable, which is especially suitable for laying large-diameter cables in the turning section.

[0036] Preferably, the cylinder is further provided with several dividing line protrusions, and several dividing line grooves corresponding to the supporting protrusions are provided above the support platform to form multiple dividing line intervals.

[0037] According to the above-mentioned scheme, the cooperation between the branching protrusion and the groove forms 2-3 independent branching sections on a single pulley, which can simultaneously support cables of different specifications such as power cables and control cables, realizing the synchronous laying of multiple types of cables in the tunnel boring machine. The width and depth of each branching section are further differentiated according to the cable diameter to ensure that the cables do not fall out of the groove or interfere with each other when moving. For example, the height of the protrusion is 1.2-1.5 times the cable diameter. The cables with different functions are placed in each branching section, avoiding the cable entanglement problem caused by traditional single-groove pulleys. In particular, the synergistic effect with the arc surface of the support platform allows multiple cables to maintain a stable relative position in the turning section, which is particularly suitable for the cable laying requirements of the curved section of the shield tunnel.

[0038] Preferably, the support platform is provided with a rotating groove and a rolling cylinder rotatably connected to the rotating groove, and the rolling cylinder and the dividing line protrusion are arranged alternately.

[0039] According to the above-described scheme, the interlaced arrangement of the rolling cylinder and the branching protrusions forms a three-dimensional friction reduction system: the upper branching structure prevents cable interference, and the lower rolling structure reduces the rolling friction of the pulley, thereby reducing the overall operating resistance of the mechanism.

[0040] Preferably, the support platform has at least one positioning recess below it and the base plate has at least one positioning protrusion, so that the support platform is separately fixed between the pulley and the support assembly.

[0041] According to the above-described solution, this utility model allows for flexible assembly of the support platform as an optional component through the interlocking of the positioning protrusions and recesses. Users can choose whether to install it based on their actual needs, achieving two configuration options: a basic version (without a support platform) and an enhanced version (with a support platform). Manufacturers can sell the support platform as an independent accessory, and users can purchase it in batches according to the progress of construction, reducing initial investment costs. During actual construction, the support platform can be disassembled to simplify the structure when laying in straight sections, and can be quickly installed to enhance stability in turning sections or under heavy load conditions, adapting to the differentiated needs of different sections in shield tunneling construction. Furthermore, the convex-concave mating structure ensures automatic alignment of the support platform during installation, such as controlling the gap between its arc surface and the cylinder within the range of 2-3mm, ensuring rotational freedom while avoiding misalignment and friction. When a single support platform is damaged, it can be replaced independently without the need for overall scrapping, reducing maintenance costs.

[0042] Preferably, the support platform has a trapezoidal structure with an arc shape at the top, and the slope of the side plates of the trapezoidal structure includes 30-70 degrees. According to the above-described scheme of this utility model, the trapezoidal slope of 30-70 degrees, combined with the arc-shaped top surface, forms an optimal force transmission path: the slope ensures the stability of the support platform, and the arc-shaped surface evenly distributes the cable pressure, enabling the mechanism to maintain smooth rotation even under heavy load conditions.

[0043] The advantages of this utility model based on the above solution are as follows: 1) Through the innovative combination of I-beam pulleys and support components, stable cable support and flexible rotation are achieved, effectively solving the problem of huge frictional resistance caused by cables dragging on the ground during traditional laying. This design allows the laying of tens of meters of cable to be completed with only a small amount of manpower, improving construction efficiency; 2) The split support platform design offers two configuration options: a basic version and an enhanced version, allowing users to flexibly choose according to their actual needs. The support platform achieves rapid installation and disassembly through the interlocking of positioning protrusions and recesses, simplifying construction on straight sections while meeting the stability requirements of curved sections or heavy-load conditions, significantly improving construction adaptability. The combination of branching protrusions and recesses forms independent branching sections, supporting the simultaneous laying of multiple types of cables, including power cables and control cables, completely solving the problem of cable entanglement. Each section is designed differently according to the cable diameter, ensuring that the cable does not detach from the groove or suffer wear during movement, improving laying efficiency.

[0044] 4) The support platform is an optional accessory and can be purchased in batches to reduce initial investment costs. It also supports independent replacement in case of damage, reducing maintenance costs. Manufacturers can also provide differentiated configurations based on user needs, expanding the product's market competitiveness.

[0045] 5) The vibration gap provides rotational space with slight displacement, reducing component wear; the optimized design of the trapezoidal support platform slope and arc surface also enables this utility model to adapt to different loads and construction environments, and is particularly suitable for complex working conditions such as curved sections of shield tunnels, demonstrating strong engineering adaptability. Attached Figure Description

[0046] Figure 1 This is a three-dimensional exploded structural diagram of Embodiment 1 of the present invention; Figure 2 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model, with dashed lines representing hidden structural lines; Figure 3 This is a side view of Embodiment 1 of the present invention; Figure 4 This is a three-dimensional exploded view of Embodiment 2 of the present invention; Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of the present invention; Figure 6 This is a three-dimensional exploded view of Embodiment 3 of the present invention; Figure 7 This is a side view of the structure of Embodiment 3 of this utility model, where the dashed lines represent hidden structural lines; Figure 8 This is a three-dimensional structural diagram of Embodiment 3 of the present invention; In the diagram, 100. Pulley; 110. Cylinder; 111. First rotating hole; 112. Dividing line protrusion; 120. Mounting plate; 200. Support assembly; 210. Side plate; 211. Second rotating hole; 220. Base plate; 221. Positioning protrusion; 300. Connecting assembly; 400. External assembly; 410. Extension plate; 420. Fixing plate; 500. Support platform; 510. Arc-shaped surface; 520. Dividing line groove; 530. Rolling cylinder; 540. Positioning recess. Detailed Implementation

[0047] To better understand the purpose, technical solution, and technical effects of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will provide further explanation. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need further definition and explanation in subsequent drawings. It is also stated that the embodiments described below are only for explaining this utility model and are not intended to limit it.

[0048] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.

[0049] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship in which a person skilled in the art would normally understand it, or the orientation or positional relationship in which the product is usually placed when in use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Example 1

[0050] like Figure 1-3 As shown, a pulley support mechanism for a tunnel boring machine cable includes: Pulley 100: Includes a support surface, with cables placed on top of the support surface; Support component 200: The support component 200 is rotatably connected to both sides of the pulley 100 to provide rolling friction between the pulley 100 and the cable when the cable is pulled. External component 400: mounted on one side of the top of the support component 200.

[0051] According to the above-described scheme, the present invention achieves lateral stable support for the pulled cable and rolling friction structure of the cable by the cooperation of the pulley 100 and the support component 200, which greatly reduces the frictional resistance when the cable moves, making long-distance cable laying more labor-saving and efficient; the external component 400 provides a quick suspension function, which allows the pulley 100 to be easily fixed on the cable tray; this structure is particularly suitable for space-constrained environments such as shield tunnels, and no additional tools are required during installation, which significantly improves construction efficiency and reduces installation difficulty.

[0052] The pulley 100 includes a cylinder 110 and mounting plates 120 located on both sides of the cylinder 110. The cylinder 110 and the mounting plates 120 form an I-beam structure. A first rotating hole 111 is provided on the inner side of the cylinder 110. The support assembly 200 includes an integrally formed side plate 210 and a bottom plate 220. A rotating space for accommodating the pulley 100 is formed between the two side plates 210 and the bottom plate 220. A second rotating hole 211 corresponding to the first rotating hole 111 is provided in the middle of the side plate 210. The pulley support mechanism is further provided with a connecting assembly 300, which passes through the first rotating hole 111 and the second rotating hole 211.

[0053] Preferably, the first rotating hole 111 and the second rotating hole 211 are the same size, and a vibration space is provided between the mounting plate and the side plate.

[0054] According to the above-described scheme, the vibration gap allows the mechanism to have a small displacement space when bearing cable load, which avoids wear caused by rigid friction and absorbs vibration energy during construction, significantly improving the durability of rotating parts.

[0055] Preferably, the external component 400 includes a laterally arranged extension plate 410 and a fixing plate 420 disposed downward on one side of the extension plate 410.

[0056] According to the above-described scheme of this utility model, the extension plate 410 and fixing plate 420 of the external component 400 are designed to provide a quick suspension function, so that the pulley 100 can be easily fixed on the cable tray.

[0057] Preferably, the mounting plate 120 has a circular structure, the cylinder 110 has a first diameter, and the circular structure has a second diameter, the first diameter being 1 / 3 to 2 / 3 of the second diameter. Specifically, it is 1 / 2.

[0058] According to the above-mentioned scheme, the optimized diameter ratio of 1 / 3 to 2 / 3 ensures that the H-beam structure maintains sufficient support strength while keeping the structure lightweight. The design of the circular mounting plate 120 provides cable movement space above the H-beam structure in the pulling state on both sides, avoiding the risk of cable detachment.

[0059] Preferably, the diameter of the mounting plate 120 is 3 / 5 to 7 / 8 of the height of the side plate 210. Specifically, it is 6 / 7.

[0060] According to the above-described scheme, the specific ratio of the diameter of the mounting plate 120 to the height of the side plate 210 (3 / 5-7 / 8) ensures that the mounting plates 120 on both sides and the side plate 210 of the support assembly 200 maintain a reasonable gap when the cylinder 110 (first diameter) rotates, thus avoiding excessive friction and preventing swaying. This size fit allows the I-beam structure mounting plate 120 to completely cover the stress area of ​​the side plate 210 of the support assembly 200, forming a stable torque transmission path under cable load. It is particularly suitable for tunnel boring machine cable laying scenarios. When the cable moves on the cylinder 110, this ratio can effectively disperse lateral forces, prevent the support assembly 200 from deforming due to excessive force on one side, and ensure the smooth dragging of tens of meters of cable. Example 2

[0061] like Figure 4 , 5 As shown, based on the basic scheme of Implementation 1, Implementation 2 provides an improved scheme by adding a support platform.

[0062] Preferably, a support platform 500 is provided above the base plate 220. The support platform 500 is installed below the I-beam structure. An arc-shaped surface 510 corresponding to the side of the cylinder 110 is provided above the support platform 500. The arc-shaped surface 510 and the connecting component 300 jointly support the rotational connection of the pulley 100.

[0063] According to the above-described scheme of this utility model, the close fit design between the arc surface 510 of the support platform 500 and the cylinder 110 forms a double support structure: the connecting component 300 undertakes the main rotation function, and the arc surface 510 provides auxiliary support, making the cable movement more stable, especially suitable for laying large-diameter cables in the turning section.

[0064] like Figure 4 , 5 As shown, a support platform 500 is provided above the base plate 220. The support platform 500 is installed below the I-beam structure. An arc-shaped surface 510 corresponding to the side of the cylinder 110 is provided above the support platform 500. The arc-shaped surface 510 and the connecting component 300 jointly support the rotational connection of the pulley 100.

[0065] According to the above-described scheme of this utility model, the close fit design between the arc surface 510 of the support platform 500 and the cylinder 110 forms a double support structure: the connecting component 300 undertakes the main rotation function, and the arc surface 510 provides auxiliary support, making the cable movement more stable, especially suitable for laying large-diameter cables in the turning section. Example 3

[0066] like Figure 6-8 As shown, based on the basic scheme of Implementation 2, Implementation 3 provides an improved scheme for optimizing the support platform.

[0067] Furthermore, the cylinder 110 is provided with several dividing line protrusions 112, and the support platform 500 is provided with several dividing line grooves 520 corresponding to the supporting protrusions to form multiple dividing line intervals.

[0068] According to the above-described scheme, the cooperation between the branching protrusion 112 and the groove forms 2-3 independent branching sections on a single pulley 100, which can simultaneously support cables of different specifications such as power cables and control cables, enabling the synchronous laying of multiple types of cables in the tunnel boring machine. The width and depth of each branching section are further differentiated according to the cable diameter to ensure that the cables do not fall out of the groove or interfere with each other when moving. For example, the height of the protrusion is 1.2-1.5 times the cable diameter. The cables with different functions are placed in each branching section, avoiding the cable entanglement problem caused by the traditional single-groove pulley 100. In particular, the synergistic effect with the arc surface 510 of the support platform 500 allows multiple cables to maintain a stable relative position in the turning section, which is particularly suitable for the cable laying requirements of the curved section of the shield tunnel.

[0069] Furthermore, a rotating groove is provided below the support platform 500 and a rolling cylinder 530 rotatably connected to the rotating groove. The rolling cylinder 530 is staggered with the dividing line protrusion 112.

[0070] According to the above-described scheme, the interlaced arrangement of the rolling cylinder 530 and the dividing protrusion 112 forms a three-dimensional friction reduction system: the upper dividing structure prevents cable interference, and the lower rolling structure reduces the rolling friction of the pulley 100, thereby reducing the overall operating resistance of the mechanism.

[0071] Furthermore, at least one positioning recess 540 is provided below the support platform 500, and at least one positioning protrusion 221 is provided on the base plate 220, so that the support platform 500 is separately fixed between the pulley 100 and the support assembly 200.

[0072] According to the above-described scheme, the support platform 500 can be flexibly assembled as an optional component through the interlocking of the positioning protrusion 221 and the recess. Users can choose whether to install it according to actual needs, realizing two configuration schemes: a basic version (without support platform 500) and an enhanced version (with support platform 500). The manufacturer can sell the support platform 500 as an independent accessory, and users can purchase it in batches according to the progress of construction, reducing the initial investment cost. In specific construction, the support platform 500 can be disassembled to simplify the structure when laying in straight sections, and the support platform 500 can be quickly added to enhance stability in turning sections or heavy-load conditions, adapting to the differentiated needs of different sections in shield tunneling construction. Furthermore, the convex and concave mating structure ensures that the support platform 500 is automatically aligned during installation. For example, the gap between its arc surface 510 and the cylinder 110 is controlled within the range of 2-3mm, which ensures the degree of freedom of rotation and avoids misalignment and friction. When a single support platform 500 is damaged, it can be replaced independently without the need for overall scrapping, reducing maintenance costs.

[0073] Furthermore, the support platform 500 includes an arc-shaped trapezoidal structure located above it, the side plates of which have an inclination of 30-70°. Specifically, it is 50°.

[0074] According to the above-mentioned scheme, the trapezoidal slope of 30-70 degrees, combined with the arc-shaped top surface, forms the optimal force transmission path: the slope ensures the stability of the support platform 500, and the arc-shaped surface 510 evenly distributes the cable pressure, so that the mechanism can still maintain smooth rotation under heavy load conditions.

[0075] The beneficial effects of the present invention as described in Embodiments 1 to 3 are as follows: 1) Through the innovative combination of the I-beam pulley 100 and the support component 200, stable support and flexible rotation of the cable are achieved, effectively solving the problem of huge frictional resistance caused by the cable dragging on the ground in traditional laying. This design allows the laying of tens of meters of cable to be completed with only a small amount of manpower, improving construction efficiency; 2) The split-type support platform 500 offers two configuration options: a basic version and an enhanced version, allowing users to flexibly choose according to their actual needs. The support platform 500 achieves rapid installation and disassembly through the interlocking of positioning protrusions 221 and recesses. This simplifies construction on straight sections and meets the stability requirements of curved sections or heavy-load conditions, significantly improving construction adaptability. The interlocking design of the branching protrusions 112 and grooves forms independent branching sections, supporting the simultaneous laying of multiple types of cables, including power cables and control cables, completely solving the problem of cable entanglement. Each section is designed differently according to the cable diameter, ensuring that the cable does not detach from the groove or suffer wear during movement, improving laying efficiency.

[0076] 4) The support platform 500 is an optional accessory and can be purchased in batches to reduce initial investment costs. It also supports independent replacement in case of damage, reducing maintenance costs. The manufacturer can also provide differentiated configurations according to user needs, expanding the product's market competitiveness.

[0077] 5) The vibration gap provides rotational space with slight displacement, reducing component wear; the optimized design of the trapezoidal support platform with an inclination of 500 and the arc surface of 510 also enables this utility model to adapt to different loads and construction environments, and is particularly suitable for complex working conditions such as curved sections of shield tunnels, demonstrating strong engineering adaptability.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pulley support mechanism for a tunnel boring machine cable, characterized in that, include: Pulley: Includes a supporting curved surface, with cables placed on top of the supporting curved surface; Support assembly: The pulley is rotatably connected to the support assembly, which provides rolling friction between the pulley and the cable when the cable is pulled; External components: suspended on the cable tray.

2. The support mechanism for a cable pulley of a tunneling machine according to claim 1, wherein The pulley includes a cylinder and mounting plates located on both sides of the cylinder. A first rotating hole is provided through the inner side of the cylinder. The support assembly includes a side plate, and a second rotating hole corresponding to the first rotating hole is provided in the middle of the side plate. The pulley support mechanism also includes a connecting assembly, which passes through the first rotating hole and the second rotating hole.

3. The support mechanism for a cable pulley of a tunneling machine according to claim 2, wherein The support assembly includes a base plate installed below the two side plates, which is integrally formed with the two side plates.

4. The support mechanism for a cable pulley of a tunneling machine according to claim 2, wherein A rolling bearing is provided between the second rotating hole and the connecting assembly.

5. The cable support mechanism for a tunneling machine of claim 1 wherein, The external components include a horizontally positioned extension plate and a downwardly positioned fixing plate on one side of the extension plate.

6. A support mechanism for a cable pulley of a tunneling machine according to any one of claims 2-5, characterized in that, A support platform is provided above the base plate. The support platform is installed below the I-beam structure, and an arc-shaped surface corresponding to the side of the cylinder is provided above the support platform.

7. The support mechanism for a cable pulley of a tunneling machine according to claim 6, wherein The cylinder is also provided with several branch line protrusions, and several branch line grooves corresponding to the support protrusions are provided above the support platform to form multiple branch line intervals.

8. The support mechanism for a cable pulley of a tunneling machine according to claim 7, wherein The support platform is provided with a rotating groove and a rolling cylinder rotatably connected to the rotating groove. The rolling cylinder and the dividing line protrusion are arranged alternately.

9. A pulley support mechanism for a tunnel boring machine cable according to claim 6, characterized in that, The support platform has at least one positioning recess below it and at least one positioning protrusion on the base plate, so that the support platform is separately fixed between the pulley and the support assembly.

10. A pulley support mechanism for a tunnel boring machine cable according to claim 6, characterized in that, The support platform includes an arc-shaped trapezoidal structure located above it, the side plates of which have an inclination of 30-70°.

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