A type of hard rock tunnel boring machine for mining

Abstract

This utility model discloses a hard rock shield tunneling machine for mining, relating to the field of mining engineering equipment technology. It includes a front shield body and a built-in slag conveying assembly located at one end of a slag conveying auger. The built-in slag conveying assembly includes a first belt conveyor and a second belt conveyor. A conveying roller is rotatably connected to the inner wall of the first belt conveyor, and a conveying belt is rotatably sleeved on the outer wall of the conveying roller. A splash guard is provided on the upper surface of the end of the first belt conveyor away from the second belt conveyor. This utility model, through the cooperative structure of the splash guard and the built-in buffer plate, allows rock slag to be guided by the built-in buffer plate and collected at the center of the conveyor belt surface when it falls into the first belt conveyor, effectively preventing slag deviation and scattering. Simultaneously, the splash guard prevents slag splashing, reduces slag waste, ensures a clean working environment inside the tunneling machine, and significantly improves slag conveying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mining engineering equipment technology, specifically a hard rock shield tunneling machine for mining. Background Technology

[0002] In the fields of mineral resource extraction and underground engineering construction, tunnel boring machines (TBMs) for hard rock are key equipment for achieving efficient tunneling in hard rock formations. With the increase in mining depth and the increasing complexity of the mining environment, the hardness of hard rock formations is higher and the geological conditions are more unstable, which places higher demands on the efficiency of TBMs in handling debris, the stability of equipment operation, and the protective performance of their components.

[0003] In actual use, the muck conveying system in a tunnel boring machine has the following problems:

[0004] During the transfer of crushed rock debris from the debris collection device to the conveyor belt, the lack of effective guidance and splash prevention structures makes it easy for the debris to scatter and splash. This not only wastes the debris but may also cause impact damage to surrounding equipment components, increasing equipment maintenance costs. At the same time, the scattered debris will affect the internal working environment of the tunneling machine and reduce overall operating efficiency. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a mining hard rock shield tunneling machine. By setting up a structure with a splash guard and an internal buffer plate, when rock debris falls into the belt conveyor, it can be guided by the internal buffer plate to gather at the center of the conveyor belt surface, effectively preventing debris from shifting or scattering. At the same time, the splash guard can prevent debris from splashing, reduce debris waste, ensure a clean working environment inside the tunneling machine, and greatly improve the efficiency of debris conveying.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a mining hard rock shield tunneling machine, comprising a front shield body;

[0007] A rotating cutterhead is located at one end of the front shield body;

[0008] The debris conveying auger is installed inside the front shield body;

[0009] An internal slag conveying assembly is installed at one end of the slag conveying auger. The internal slag conveying assembly includes a belt conveyor 1 and a belt conveyor 2. A conveying roller is rotatably connected to the inner wall of the belt conveyor 1, and a conveying belt is rotatably sleeved on the outer wall of the conveying roller. A splash guard is provided on the upper surface of the end of the belt conveyor 1 away from the belt conveyor 2. The end of the belt conveyor 1 away from the splash guard is located above the belt conveyor 2. A mounting frame is fixedly connected to the outer wall of the splash guard near the top, and a horizontal plate is fixedly connected to the inner wall of the mounting frame.

[0010] As a preferred embodiment of this utility model, the inner wall of the splash guard is movably connected to a built-in buffer plate, and a guide slide rod is fixedly connected to one side of the built-in buffer plate. One end of the guide slide rod movably extends through to the outer wall of the splash guard, and the outer wall of the horizontal plate is provided with a sliding hole adapted to the guide slide rod.

[0011] In a preferred embodiment of this invention, the outer wall of the guide slide rod is slidably connected to the inner wall of the slide hole, a return spring is sleeved on the outer wall of one end of the guide slide rod, and a rubber gasket is fixedly sleeved on the other end of the guide slide rod.

[0012] As a preferred embodiment of this utility model, a positioning frame is fixedly connected to the outer wall of the belt conveyor, and the bottom end of the splash guard is detachably fixedly connected to the positioning frame by bolts.

[0013] As a preferred embodiment of this invention, an arc-shaped shield plate is provided at the end of the front shield body away from the rotating cutterhead.

[0014] As a preferred embodiment of this utility model, the bottom end of the splash guard is fixedly connected to a fitting arc plate, and the bottom surface of the fitting arc plate is movably connected to the upper surface of the conveyor belt.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. By setting up a structure that combines a splash guard and a built-in buffer plate, rock debris falling into the belt conveyor can be guided by the built-in buffer plate to gather at the center of the conveyor belt surface, effectively preventing debris from shifting or scattering. At the same time, the splash guard can prevent debris from splashing, reduce debris waste, ensure a clean working environment inside the tunneling machine, and greatly improve the efficiency of debris conveying.

[0017] 2. This utility model has a double buffer structure consisting of a built-in buffer plate, a guide slide rod, a return spring, and a rubber pad ring. When rock fragments impact the built-in buffer plate, the return spring achieves initial buffering through elastic deformation, and the rubber pad ring achieves secondary energy absorption buffering through its own deformation. This greatly reduces the impact force of the fragments, avoids wear and deformation of components such as conveyor belts and splash hoppers due to long-term high-intensity impact, significantly extends the service life of equipment components, and reduces equipment maintenance costs.

[0018] 3. This utility model achieves detachable connection between the splash guard and the positioning frame via the mounting bracket, bolts, etc. When the splash guard or the built-in buffer plate or other components are worn or malfunction and need maintenance or replacement, the splash guard can be removed simply by unscrewing the bolts. The operation is simple and convenient, shortens the equipment downtime for maintenance, and ensures continuous tunneling operations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing a partial structural detail of the present invention;

[0020] Figure 2 This is a schematic diagram of the built-in slag conveying assembly of this utility model;

[0021] Figure 3 This is a schematic diagram of the splash guard structure of this utility model;

[0022] Figure 4 This is a schematic diagram showing the detailed structure of the splash guard of this utility model.

[0023] In the diagram: 1. Front shield; 2. Rotating cutterhead; 3. Built-in slag conveying assembly; 4. Slag conveying auger; 5. Arc-shaped shield plate; 6. Belt conveyor one; 7. Belt conveyor two; 8. Conveying roller; 9. Conveying belt; 10. Splash hopper; 11. Built-in buffer plate; 12. Mounting bracket; 13. Fitting arc plate; 14. Guide slide bar; 15. Return spring; 16. Rubber gasket ring; 17. Positioning frame; 18. Bolt. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0028] Example 1

[0029] Reference Figure 1-4 This is the first embodiment of the present invention, which provides a mining hard rock shield tunneling machine, including a front shield body 1;

[0030] A rotating cutterhead 2 is located at one end of the front shield body 1;

[0031] Debris conveying auger 4 is installed inside the front shield 1;

[0032] An internal crushing conveying assembly 3 is installed at one end of the crushing conveying auger 4. The internal crushing conveying assembly 3 includes a belt conveyor 6 and a belt conveyor 7. A conveying roller 8 is rotatably connected to the inner wall of the belt conveyor 6, and a conveying belt 9 is rotatably sleeved on the outer wall of the conveying roller 8. A splash shield 10 is provided on the upper surface of the end of the belt conveyor 6 away from the belt conveyor 7. The end of the belt conveyor 6 away from the splash shield 10 is located above the belt conveyor 7. A mounting frame 12 is fixedly connected to the outer wall of the splash shield 10 near the top, and a horizontal plate is fixedly connected to the inner wall of the mounting frame 12.

[0033] Specifically, by setting up a cooperative structure between the splash bucket 10 and the built-in buffer plate 11, when rock debris falls into the belt conveyor 6, it can be gathered at the center of the surface of the conveyor belt 9 under the guidance of the built-in buffer plate 11, effectively preventing the debris from shifting and scattering. At the same time, the splash bucket 10 can prevent debris from splashing, reduce debris waste, ensure a clean working environment inside the tunneling machine, and greatly improve the efficiency of debris conveying.

[0034] Example 2

[0035] The second embodiment of this utility model provides a technical solution: the inner wall of the splash shield 10 is movably connected to a built-in buffer plate 11, and a guide slide rod 14 is fixedly connected to one side of the built-in buffer plate 11. One end of the guide slide rod 14 movably extends through to the outer wall of the splash shield 10, and the outer wall of the horizontal plate is provided with a sliding hole adapted to the guide slide rod 14.

[0036] The outer wall of the guide slide rod 14 is slidably connected to the inner wall of the sliding hole. A return spring 15 is sleeved on the outer wall of one end of the guide slide rod 14, and a rubber washer ring 16 is fixedly sleeved on the other end of the guide slide rod 14.

[0037] The outer wall of the belt conveyor 6 is fixedly connected to a positioning frame 17, and the bottom end of the splash guard 10 is detachably fixedly connected to the positioning frame 17 by bolts 18.

[0038] An arc-shaped shield plate 5 is provided at the end of the front shield body 1 that is away from the rotating cutterhead 2.

[0039] The bottom end of the splash guard 10 is fixedly connected to the fitting arc plate 13, and the bottom surface of the fitting arc plate 13 is movably connected to the upper surface of the conveyor belt 9.

[0040] Specifically, a dual buffer structure is formed by the built-in buffer plate 11, guide slide rod 14, return spring 15 and rubber pad ring 16. When rock fragments impact the built-in buffer plate 11, the return spring 15 achieves initial buffering through elastic deformation, and the rubber pad ring 16 achieves secondary energy absorption buffering through its own deformation. This greatly reduces the impact force of the fragments, avoids wear and deformation of components such as the conveyor belt 9 and splash bucket 10 due to long-term high-intensity impact, significantly extends the service life of equipment components, and reduces equipment maintenance costs.

[0041] Example 3

[0042] The third embodiment of this utility model provides a technical solution: the frame of belt conveyor 6 and belt conveyor 7 is made of high-strength steel, which has good welding performance and strength and can meet the support and load-bearing requirements of the frame; the conveyor belt 9 is a steel wire rope core rubber conveyor belt, which has high strength, high wear resistance and good tensile strength, and is suitable for conveying hard rock slag.

[0043] Rubber gasket ring 16: Made of nitrile rubber, which has good oil resistance, wear resistance and elasticity, can effectively absorb impact energy and adapt to the harsh environment in tunneling operations.

[0044] Working principle:

[0045] First, the rotating cutterhead 2, located at one end of the front shield 1, performs crushing operations on the hard rock in front. After the rock is crushed, the crushed rock fragments are collected by the slag conveying auger 4 located inside the front shield 1 and conveyed to the built-in slag conveying assembly 3 located at one end of the slag conveying auger 4. Subsequently, the crushed rock fragments are discharged through the outlet of the slag conveying auger 4 onto the belt conveyor 6 in the built-in slag conveying assembly 3.

[0046] At this time, the belt conveyor 6 receives the thrown rock debris through the splash shield 10. When the rock debris falls into the inner wall of the splash shield 10, under the guidance of the built-in buffer plate 11 movably connected to the inner wall of the splash shield 10, the debris gradually gathers at the center of the conveyor belt 9 of the belt conveyor 6, effectively preventing the debris from deviating and falling off the conveyor belt 9. When the rock debris impacts the built-in buffer plate 11, the built-in buffer plate 11 will move outward, and during the movement of the built-in buffer plate 11, it will drive the guide slide rod 14 to move synchronously. At this time, the return spring 15 on the guide slide rod 14 will be stretched, and the elastic deformation of the return spring 15 will buffer the force generated by the impact of the debris. At the same time, when the built-in buffer plate 11 moves outward, the rubber pad ring 16 fixedly sleeved at the other end of the guide slide rod 14 will fit against the inner wall of the splash shield 10. The rubber pad ring 16 will further absorb the impact energy by utilizing its own deformation characteristics, realizing secondary buffering. The built-in buffer plate 11 is provided with a baffle plate at the top. The baffle plate is used to cover the gap between the built-in buffer plate 11 and the top of the splash hopper 10 to prevent rock debris from leaking out from the gap.

[0047] The end of belt conveyor 6 that is away from belt conveyor 7 is lower than the other end. Under the action of this inclined structure, the rock debris on belt conveyor 6 can be transported towards belt conveyor 7 under the combined action of gravity and the transmission of conveyor belt 9. Finally, the debris is transported from belt conveyor 6 to belt conveyor 7 located below it, and belt conveyor 7 further transports the debris to the subsequent processing stage.

[0048] Regarding the installation and removal of the splash guard 10, a mounting frame 12 is fixedly connected to the outer wall near the top of the splash guard 10. The mounting frame 12 is fixed to the positioning frame 17, which is fixedly connected to the outer wall of the belt conveyor 6, by bolts 18. The positioning frame 17 is welded and fixed to the base on the outer wall of the belt conveyor 6. When it is necessary to disassemble and maintain the splash guard 10, simply remove the bolts 18, and the mounting frame 12 along with the splash guard 10 can be removed from the belt conveyor 6, which is convenient. In addition, an arc-shaped shield plate 5 is provided at the end of the front shield body 1 away from the rotating cutterhead 2. The arc-shaped shield plate 5 can protect the rear structure of the front shield body 1 and ensure the stability of the overall structure of the tunneling machine.

[0049] In summary, by setting up the combined structure of the splash guard 10 and the built-in buffer plate 11, when rock debris falls into the belt conveyor 6, it can be guided by the built-in buffer plate 11 to gather at the center of the conveyor belt 9 surface, effectively preventing debris from shifting and scattering. At the same time, the splash guard 10 can prevent debris from splashing, reduce debris waste, ensure a clean working environment inside the tunneling machine, and greatly improve the efficiency of debris conveying.

[0050] The rotary cutter head, slag conveying auger, and conveying rollers used in this application can be additionally equipped with protective measures of common knowledge in this technical field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0051] It should be noted that the rotary cutter head, the slag conveying auger, and the conveying roller are existing devices or equipment, or devices or equipment that can be implemented with existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are all common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0052] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​such as temperature, pressure, etc., installation arrangements, use of materials, color, orientation, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise changed, and the nature or number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of this utility model. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0053] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0054] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A mine hard rock tunnel boring machine characterised in that: Including the front shield (1); A rotating cutterhead (2) is located at one end of the front shield body (1); The debris conveying auger (4) is installed inside the front shield (1); An internal slag conveying assembly (3) is provided at one end of the slag conveying auger (4). The internal slag conveying assembly (3) includes a belt conveyor (6) and a belt conveyor (7). A conveying roller (8) is rotatably connected to the inner wall of the belt conveyor (6). A conveying belt (9) is rotatably sleeved on the outer wall of the conveying roller (8). A splash shield (10) is provided on the upper surface of the end of the belt conveyor (6) away from the belt conveyor (7). The end of the belt conveyor (6) away from the splash shield (10) is located above the belt conveyor (7). A mounting frame (12) is fixedly connected to the outer wall of the splash shield (10) near the top. A horizontal plate is fixedly connected to the inner wall of the mounting frame (12).

2. The mine hard rock shield tunneling machine of claim 1, wherein: The inner wall of the splash shield (10) is movably connected to a built-in buffer plate (11), and a guide slide rod (14) is fixedly connected to one side of the built-in buffer plate (11). One end of the guide slide rod (14) movably extends through to the outer wall of the splash shield (10), and the outer wall of the horizontal plate is provided with a sliding hole that matches the guide slide rod (14).

3. A mining hard rock shield tunneling machine according to claim 2, characterized in that: The outer wall of the guide slide rod (14) is slidably connected to the inner wall of the sliding hole. A return spring (15) is sleeved on the outer wall of one end of the guide slide rod (14), and a rubber gasket (16) is fixedly sleeved on the other end of the guide slide rod (14).

4. A mining hard rock shield tunneling machine according to claim 1, characterized in that: The outer wall of the belt conveyor (6) is fixedly connected to a positioning frame (17), and the bottom end of the splash guard (10) is detachably fixedly connected to the positioning frame (17) by bolts (18).

5. A mining hard rock shield tunneling machine according to claim 1, characterized in that: An arc-shaped shield plate (5) is provided at the end of the front shield body (1) away from the rotating cutterhead (2).

6. A mining hard rock shield tunneling machine according to claim 1, characterized in that: The bottom end of the splash guard (10) is fixedly connected to a fitting arc plate (13), and the bottom surface of the fitting arc plate (13) is movably connected to the upper surface of the conveyor belt (9).

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