High-pressure-resistant shield detection shell

Abstract

The utility model belongs to the field of shield construction geological detection equipment, and particularly discloses a high-pressure-resistant shield detection shell. The shield detection shell comprises a shell body, the shell body is in a streamline cylinder shape and is provided with a closed front end with the outer diameter gradually reduced and an open rear end with the smooth outer wall, and the open rear end is provided with a connecting structure used for being connected with external shield equipment; the buffer layer is arranged on the inner wall of the shell main body; wherein the shell main body is an integrated component, and micropores which penetrate through the outer wall but are not communicated with the interior are formed in the peripheral surface of the shell main body. The shield detection has excellent high pressure resistance and light weight characteristics, and can form good protection for the internal geological detection sensor.

Description

Technical Field

[0001] This application belongs to the field of geological exploration equipment for tunnel boring machines, and more specifically, relates to a high-pressure shield tunnel exploration shell. Background Technology

[0002] Shield tunneling is a construction method widely used in subways, undersea tunnels, and mine tunnels. During construction, to ensure the safety and efficiency of tunnel excavation, it is usually necessary to use geological exploration equipment to monitor the strata ahead in real time to identify potential risks.

[0003] Currently, the casings of geological exploration equipment mostly adopt a modular assembly design. For example, CN219316952U proposes a modular shield casing structure for a coal mine tunnel boring machine, which achieves structural modularity by dividing the casing into three parts: the front shield, the middle shield, and the tail shield. However, this type of casing not only has limited high-pressure resistance but is also quite heavy, which is not conducive to the lightweight design of construction equipment. Moreover, in the tunnel boring machine environment, geological exploration equipment is usually affected by external factors such as high-frequency vibration and strong impact. This type of casing has limited protection capabilities for internal sensors, which can easily lead to sensor failure or increased detection data errors. Therefore, improvements are urgently needed. Utility Model Content

[0004] In response to the deficiencies or improvement needs of existing technologies, this application provides a high-pressure resistant shield tunneling detection housing, which aims to improve the problems of limited high-pressure resistance, heavy weight, and limited protection of internal sensors of traditional detection housings.

[0005] This application provides a high-pressure resistant shield tunneling detection shell, specifically comprising:

[0006] The outer shell body is a streamlined cylindrical shape, with a closed front end that tapers in outer diameter and an open rear end with a smooth outer wall. The open rear end is provided with a connection structure for connecting to an external tunnel boring machine.

[0007] A buffer layer is disposed on the inner wall of the outer shell body;

[0008] The outer shell body is an integral component, and the outer peripheral surface of the outer shell body is provided with micropores that penetrate the outer wall but do not communicate with the interior.

[0009] As a further preferred embodiment, the diameter of the micropores is 0.5mm-1mm, and the micropore density is 10-15 per square centimeter.

[0010] As a further preferred embodiment, the outer diameter of the outer shell body is 80mm-120mm, the axial length is 200mm-300mm, and the wall thickness is 5mm-8mm.

[0011] As a further preferred embodiment, the thickness of the buffer layer is 2mm-3mm.

[0012] As a further preferred embodiment, the connection structure includes a threaded interface disposed on the outer peripheral surface of the open rear end.

[0013] As a further preferred embodiment, the connection structure is provided with multiple connections spaced apart on the outer peripheral surface of the outer shell body.

[0014] As a further preferred embodiment, the outer periphery of the closed front end face is provided with a rounded chamfer structure.

[0015] As a further preferred embodiment, a ceramic washer is embedded at the outer end of the opening of the threaded interface.

[0016] As a further preferred embodiment, the outer shell body is a high-strength, high-pressure resistant ceramic cylinder.

[0017] As a further preferred embodiment, the buffer layer is an elastic shock-resistant buffer layer.

[0018] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages:

[0019] The shield tunneling detection shell of this application possesses excellent high-pressure resistance. The high-pressure resistant ceramic cylinder design and microporous design extend the shell's service life to an extremely long extent in extreme environments, while also providing excellent corrosion resistance and lightweight characteristics. This reduces the frequency of shell replacement during shield tunneling, minimizes downtime, and saves maintenance costs. Furthermore, the internal buffer layer effectively reduces vibration interference, thereby lowering the sensor signal error rate and improving geological detection accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a high-pressure shield tunneling detection shell provided in an embodiment of this application;

[0021] Figure 2 This is a cross-sectional view of a high-pressure shield tunneling detection shell provided in an embodiment of this application;

[0022] Figure 3 This is a bottom view of a high-pressure shield tunneling detection shell provided in an embodiment of this application.

[0023] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0024] 1. Outer shell; 1-1. Closed front end; 1-2. Open rear end; 2. Buffer layer; 3. Micropores; 4. Connecting structure. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0027] This application discloses a high-pressure resistant shield tunneling detection shell. (Refer to...) Figures 1-3 The high-pressure shield tunneling detection shell includes an outer shell body 1 and a buffer layer 2. The outer shell body 1 is a streamlined cylindrical shape with a closed front end 1-1 that tapers in outer diameter and an open rear end 1-2 with a smooth outer wall. The open rear end 1-2 is provided with a connection structure 4 for connecting to external shield tunneling equipment. The buffer layer 2 is provided on the inner wall of the outer shell body 1. The outer shell body 1 is an integral component, and the outer circumferential surface of the outer shell body 1 is provided with micropores 3 that penetrate the outer wall but do not connect to the interior.

[0028] In this design, the outer shell 1 of the high-pressure shield tunneling detection shell is a one-piece component and has a streamlined cylindrical shape, which gives the outer shell 1 excellent high-pressure resistance. The closed front end 1-1 with a gradually narrowing outer diameter of the outer shell 1 makes the front end of the outer shell 1 slightly pointed to reduce soil resistance; the open rear end 1-2 with a smooth outer wall and a connecting structure 4 allows the outer shell 1 to be smoothly assembled with external shield tunneling equipment and allows the detector to be installed into the outer shell 1 along the open end.

[0029] The micropores 3 on the outer surface reduce the weight of the shell and lower the load on the tunnel boring machine (TBM). The internal buffer layer 2 absorbs vibrations during TBM operation and protects internal geological sensors (such as acoustic or electromagnetic sensors) from mechanical impact. This makes the shell lightweight and provides excellent pressure resistance and shock resistance. Therefore, the high-pressure resistant TBM detection shell of this application is particularly suitable for TBM construction in high-water-pressure strata (such as undersea tunnels), uneven strata, or highly corrosive environments (such as sulfide-containing strata), providing long-term and stable protection for geological exploration equipment.

[0030] Furthermore, in some embodiments, the outer shell body 1 is a high-strength, high-pressure resistant ceramic cylinder, made of high-strength, high-pressure resistant ceramic, such as zirconium oxide or silicon nitride. The compressive strength of this structure is ≥1500 MPa, far exceeding that of traditional stainless steel materials (which typically have a compressive strength between 500-900 MPa). In addition, this material exhibits excellent chemical stability in acidic, alkaline, and high-salinity environments, allowing for long-term use without oxidation or corrosion.

[0031] Furthermore, in some embodiments, the outer diameter of the outer shell body 1 is 80mm-120mm, the axial length is 200mm-300mm, and the wall thickness is 5mm-8mm, ensuring a balance between strength and weight. Preferably, the outer periphery of the closed front end 1-1 in the outer shell body 1 is provided with a rounded chamfer structure to further reduce soil resistance.

[0032] With this design, the outer shell body 1 is elongated overall, with suitable strength and weight, which is beneficial for the detection shell to withstand the environmental pressure in deep sea or high-pressure strata, preventing the detection shell from cracking or deforming. Of course, in some other embodiments, the structural dimensions of the outer shell body 1 can also be adjusted according to the size of the detector. In fact, the outer shell body 1 can be a streamlined cylinder that is thicker in the middle and narrower at both ends, or it can be a streamlined cylinder that is narrow at the front end and has a uniform diameter in the middle and rear ends.

[0033] Furthermore, such as Figure 2 As shown, in some embodiments, the buffer layer 2 is an elastic shock-resistant buffer layer, preferably with a thickness of 2mm-3mm. It is attached to the inner wall of the shell and is preferably made of highly elastic polyurethane material. The buffer layer 2 under this design can absorb the vibration during the operation of the tunnel boring machine and protect the internal geological exploration sensors (such as acoustic or electromagnetic wave sensors) from mechanical impact.

[0034] In practice, if the buffer layer 2 is too thin (e.g., less than 2mm), it often cannot adequately absorb high-frequency vibrations and instantaneous impact energy, potentially causing vibrations to be directly transmitted to the internal geological detection sensor, posing a risk of damage. If the buffer layer 2 is too thick (e.g., greater than 3mm), it will encroach on the installation space of the geological detection sensor, possibly forcing other components to be smaller or have their layout altered, affecting the overall design rationality. Therefore, a thickness of 2mm-3mm for the buffer layer 2 is the optimal choice.

[0035] Furthermore, in some embodiments, micropores 3 are uniformly arranged on the outer peripheral surface of the outer shell body 1, the diameter of the micropores 3 is 0.5mm-1mm, and the density of the micropores 3 is 10-15 per square centimeter.

[0036] By setting micropores 3 within this parameter range on the surface of the outer shell 1, the weight of the outer shell 1 can be reduced by 10%-15%, thus reducing the load on the tunnel boring machine. This also enhances heat dissipation, preventing geological sensors from overheating and failing due to prolonged operation. Furthermore, the micropores 3 reduce soil adhesion, improving the shell's adaptability in complex geological formations.

[0037] In practice, if the pore size of the micropores is too small (e.g., less than 0.5 mm) or the density of the micropores is too low (e.g., less than 10 per square centimeter), the surface area of ​​the micropores will be insufficient, heat dissipation efficiency will decrease, and the overall weight reduction effect will be poor. Moreover, it is more difficult to form micropores that are too small. On the other hand, if the pore size of the micropores is too large (e.g., greater than 1 mm) or the density of the micropores is too high (e.g., greater than 15 per square centimeter), it may reduce the strength of the outer shell and decrease its wear resistance.

[0038] Furthermore, in some embodiments, the connection structure 4 includes a threaded interface disposed on the outer circumferential surface of the open rear end 1-2. Preferably, the threaded interface is a standard threaded interface (such as an M20 standard thread or other custom-designed thread), and the threaded interface is used to connect to the front-end detection support of the tunnel boring machine.

[0039] Preferably, a wear-resistant ceramic washer (not shown in the figure) is embedded at the outer end of the threaded interface opening to ensure that the housing is securely installed and easy to disassemble and maintain. The interface can also be used to thread signal transmission cables. Of course, in some other embodiments, the connection structure 4 can also adopt existing connection methods such as a snap-fit ​​interface.

[0040] More preferably, multiple connecting structures 4 are provided at intervals on the outer peripheral surface of the housing body 1. For example, four are provided. By providing multiple connecting structures 4, the assembly stability of the housing is improved.

[0041] Furthermore, the manufacturing process of a high-pressure shield tunneling detection shell according to an embodiment of this application is as follows:

[0042] The outer shell body 1 is manufactured using ceramic injection molding to ensure the precision of the overall structure. The micropores 3 are processed by laser drilling, resulting in uniform and controllable pore size and distribution. The buffer layer 2 is attached to the inner wall of the outer shell body 1 using a high-temperature bonding process, while the connecting structure 4 is integrally formed with the outer shell body 1 through machining.

[0043] Furthermore, the installation steps of a high-pressure shield tunneling detection shell according to an embodiment of this application are as follows:

[0044] S1: Fix the geological exploration sensor (such as an ultrasonic probe) inside the buffer layer 2.

[0045] For example, after the sensor is in the preset position, a flexible sealing material (such as silicone gel or polyurethane potting compound) is used to fill the space between the buffer layer 2 and the sensor, thereby fixing the geological exploration sensor (such as an ultrasonic probe) to the buffer layer 2.

[0046] S2: Fix the outer shell body 1 to the front end of the tunnel boring machine (e.g., fix it at the front detection bracket) through the threaded interface, and connect the signal transmission cable.

[0047] S3: Conduct pressure and sealing tests before construction to ensure the pressure resistance, corrosion resistance, and seismic resistance of the casing.

[0048] Compared to traditional metal (such as stainless steel) shells, this high-pressure shield tunneling detection shell boasts superior durability. The high-pressure resistant ceramic material and microporous design extend its lifespan in extreme environments to 2-3 times that of traditional metal shells (approximately 5000 hours or more). Furthermore, the shield tunneling detection project exhibits exceptional stability. The presence of buffer layer 2 effectively reduces vibration interference, lowering the error rate of geological detection sensor signals by approximately 20%, thereby improving geological detection accuracy and further enhancing construction efficiency. The lightweight design (approximately 30% lighter than a metal shell of the same volume) and corrosion resistance reduce equipment replacement frequency, minimize downtime, and save on maintenance costs.

[0049] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0050] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0051] 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] In this application, unless otherwise expressly 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high pressure resistant shielded probe housing, characterized in that, include: The outer shell body (1) is a streamlined cylindrical shape, with a closed front end (1-1) with a gradually narrowing outer diameter and an open rear end (1-2) with a smooth outer wall. The open rear end (1-2) is provided with a connection structure (4) for connecting external shield tunneling equipment. A buffer layer (2) is disposed on the inner wall of the outer shell body (1); The outer shell body (1) is an integral component, and the outer peripheral surface of the outer shell body (1) is provided with micropores (3) that penetrate the outer wall but do not communicate with the interior.

2. The high pressure resistant shielded probe housing of claim 1, wherein, The diameter of the micropores (3) is 0.5 mm to 1 mm, and the density is 10 to 15 per square centimeter.

3. The high pressure resistant shielded probe housing of claim 1, wherein, The outer diameter of the outer shell body (1) is 80mm-120mm, the axial length is 200mm-300mm, and the wall thickness is 5mm-8mm.

4. The high pressure resistant shielded probe housing of claim 1, wherein, The thickness of the buffer layer (2) is 2mm-3mm.

5. The high pressure resistant shielded probe housing of claim 1, wherein, The connection structure (4) includes a threaded interface disposed on the outer circumferential surface of the open rear end (1-2).

6. The high pressure resistant shielded probe housing of claim 5, wherein, A ceramic washer is embedded at the outer end of the opening of the threaded interface.

7. The high pressure resistant shielded probe housing of claim 1, wherein, The connection structure (4) is provided in multiple circumferentially spaced on the outer peripheral surface of the outer shell body (1).

8. The high pressure resistant shielded probe housing of claim 1, wherein, The outer periphery of the end face of the closed front end (1-1) is provided with a rounded chamfer structure.

9. The high pressure resistant shielded probe housing of any of claims 1-8, wherein, The outer shell body (1) is a high-strength, high-pressure resistant ceramic cylinder.

10. The high pressure resistant shielded probe housing of any of claims 1-8, wherein, The buffer layer (2) is an elastic shock-resistant buffer layer.

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