Sealing structure

Abstract

The utility model provides a kind of sealing structure, for protecting the antenna pedestal and antenna on the tunneling machine shell, including protective shell, sealing plate and sealing sleeve, sealing plate is set in tunneling machine shell, the lower end of protective shell is equipped with sealing groove, sealing plate is sealed with sealing groove connection, protective shell covers the antenna pedestal on tunneling machine shell, the upper end of protective shell is equipped with through hole, sealing sleeve is fixedly set in through hole, antenna passes through sealing sleeve, sealing sleeve is used for fixed antenna and sealed protective shell.Thus can prevent dust, water mist, coal dust etc. by bottom gap invasion.And use sealing sleeve to cover antenna, and with through hole close connection, solve the antenna and protective shell penetration interface water leakage, dust leakage etc. in existing structure.Proceeds through multiple sealing design joint action, realized from antenna, antenna pedestal to the closed protection of tunneling machine shell, avoid the damage of tunneling machine internal component and antenna, improve the overall work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for tunneling machine housings, and more specifically, to a sealing structure. Background Technology

[0002] With the continuous improvement of mechanization in coal mines, underground tunneling machines have been widely used in coal mine roadway construction. Due to the typically confined space, high humidity, high dust concentration, and flammable and explosive gases such as methane in underground environments, tunneling operations pose significant safety risks. To reduce the risk of personnel directly entering hazardous areas, existing tunneling machines are increasingly adopting remote control methods. By installing antenna bases and wireless communication modules, tunneling machines can communicate with ground control centers, thereby improving operational safety and intelligence.

[0003] However, in the existing technology, the lack of effective sealing and protection for the antenna base and antenna leads to damage to the antenna base and antenna, which in turn damages the electronic components and communication modules inside the antenna base and antenna, affecting the signal transmission effect and the reliability and working efficiency of the tunneling machine.

[0004] An existing underground remote-controlled tunneling machine, despite being equipped with functional modules such as an antenna base and a water mist spraying device to improve the underground communication environment and air quality, still has its antenna base and antenna body exposed to the outside, lacking sealing and impact-resistant structures, making it difficult to meet the requirements for long-term, stable, and highly reliable operation. Utility Model Content

[0005] This invention provides a sealing structure to solve the problem that existing tunneling machines lack protection for the antenna base and antenna body.

[0006] To address the aforementioned problems, this utility model provides a sealing structure for protecting the antenna base and antenna on the outer shell of a tunneling machine. The structure includes a protective shell, a sealing plate, and a sealing sleeve. The sealing plate is disposed on the outer shell of the tunneling machine. A sealing groove is formed at the lower end of the protective shell, and the sealing plate is sealed to the sealing groove. The protective shell covers the antenna base on the outer shell of the tunneling machine. A through hole is formed at the upper end of the protective shell, and the sealing sleeve is fixedly disposed in the through hole. The antenna passes through the sealing sleeve, which is used to fix the antenna and seal the protective shell.

[0007] Furthermore, the sealing structure also includes a fixing plate, which is fixedly connected to the side of the protective shell, and the lower surface of the fixing plate is connected to the outer shell of the tunneling machine.

[0008] Furthermore, the sealing structure also includes a positioning plate, which is installed on the outer shell of the tunneling machine and connected to the fixing plate.

[0009] Furthermore, the lower surface of the fixing plate is provided with a positioning groove and an assembly hole, and a positioning post is provided on the positioning plate. The positioning plate is connected to the positioning groove, and the positioning post is connected to the assembly hole.

[0010] Furthermore, the sealing structure also includes a fastening plate, one side of which is fixedly connected to the tunneling machine housing, and the other side of which is connected to a fixed plate. Multiple sets of protrusions are evenly arranged in the width direction of the fastening plate, which are used to enhance the sealing between the fastening plate and the fixed plate.

[0011] Furthermore, a sealing gasket is provided on the lower surface of the fixing plate. The sealing gasket matches the fastening plate and is used to enhance the sealing between the fastening plate and the fixing plate.

[0012] Furthermore, a sealing layer is provided on the inner surface of both the positioning groove and the assembly hole to enhance the sealing between the positioning plate and the positioning groove, as well as the sealing between the positioning post and the assembly hole.

[0013] Furthermore, the sealing structure also includes a fastening structure, through which the fixing plate is connected to the positioning plate to enhance the stability of the connection between the tunneling machine outer shell and the protective shell.

[0014] Furthermore, the sealing structure also includes an auxiliary sealing plate with a through hole, a groove at the upper end of the fixing plate, the auxiliary sealing plate being fixedly installed in the groove, a positioning hole on the positioning post with a thread, the axis of the through hole coinciding with the axis of the positioning hole, and a fastening structure passing through the through hole and threadedly connected to the positioning hole.

[0015] Furthermore, the sealing structure also includes multiple sets of reinforcing plates, which are disposed inside the protective shell. One end of the reinforcing plate is connected to the side wall of the protective shell, and the other end of the reinforcing plate is connected to the top wall of the protective shell, in order to enhance the structural strength of the protective shell.

[0016] By applying the technical solution of this utility model, the sealing plate and the sealing groove at the bottom of the protective shell are sealed together, forming a surrounding sealed interface at the bottom of the protective shell, which can prevent dust, water mist, coal dust, etc. from entering through the bottom gaps. Furthermore, a sealing sleeve is used to cover the antenna and is tightly connected to the through hole, solving the problems of water and dust leakage at the antenna-protective shell penetration interface in existing structures. Moreover, through the combined effect of multiple sealing designs, a closed protection is achieved from the antenna and antenna base to the tunneling machine's outer shell, preventing damage to internal components of the tunneling machine and the antenna, and improving overall work efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the sealing structure provided in an embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 Top view;

[0020] Figure 3 It shows Figure 1 A top view of part of the structure;

[0021] Figure 4 It shows Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 5 A partially disassembled structural diagram of the sealing structure provided in an embodiment of the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 1. Tunneling machine outer shell; 2. Positioning plate; 3. Fixing plate; 4. Antenna base; 5. Protective shell; 6. Reinforcing plate; 7. Sealing sleeve; 8. Antenna; 9. Sealing layer; 10. Fastening plate; 11. Sealing gasket; 12. Positioning post; 13. Auxiliary sealing plate; 14. Fastening structure; 15. Sealing plate; 16. Positioning groove; 17. Assembly hole; 18. Sealing groove; 19. Positioning hole; 20. Raised strip; 21. Through hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] like Figures 1 to 5 As shown, an embodiment of this utility model provides a sealing structure for protecting the antenna base 4 and antenna 8 on the tunneling machine housing 1. It includes a protective shell 5, a sealing plate 15, and a sealing sleeve 7. The sealing plate 15 is disposed on the tunneling machine housing 1. A sealing groove 18 is provided at the lower end of the protective shell 5. The sealing plate 15 is sealed to the sealing groove 18. The protective shell 5 covers the antenna base 4 on the tunneling machine housing 1. A through hole is provided at the upper end of the protective shell 5. The sealing sleeve 7 is fixedly disposed in the through hole. The antenna 8 passes through the sealing sleeve 7. The sealing sleeve 7 is used to fix the antenna 8 and seal the protective shell 5.

[0027] In this embodiment, the sealing plate 15 is sealed to the sealing groove 18 at the bottom of the protective shell 5, forming a surrounding sealed interface at the bottom of the protective shell 5, which can prevent dust, water mist, coal dust, etc. from entering through the bottom gaps. Furthermore, the antenna 8 is covered by a sealing sleeve 7 and tightly connected to the through hole, solving the problems of water and dust leakage at the penetration interface between the antenna 8 and the protective shell 5 in existing structures. Moreover, through the combined effect of multiple sealing designs, a closed protection is achieved from the antenna 8 and antenna base 4 to the tunneling machine outer shell 1, avoiding damage to the internal components of the tunneling machine and the antenna 8, and improving overall work efficiency.

[0028] like Figure 4 and Figure 5 As shown, the sealing structure also includes a fixing plate 3, which is fixedly connected to the side of the protective shell 5, and the lower surface of the fixing plate 3 is connected to the tunneling machine outer shell 1. By connecting the fixing plate 3 to the side of the protective shell 5 and extending it to the tunneling machine outer shell 1, a clamping and supporting structure is formed laterally, fixing and constraining the protective shell 5 to prevent it from shifting due to vibration, impact, or gravity, thus improving the overall stability of the sealing structure. Furthermore, the addition of the fixing plate 3 allows external impact forces to be transmitted from the protective shell 5 to the fixing plate 3, and then to the tunneling machine outer shell 1, achieving force diffusion and protecting the sealing interface and antenna 8 from damage.

[0029] like Figures 1 to 5 As shown, the sealing structure also includes a positioning plate 2, which is installed on the tunneling machine housing 1 and connected to the fixing plate 3. By setting the positioning plate 2 and connecting it to the fixing plate 3, a double-nested mating structure can be formed, achieving precise alignment and installation, and reducing problems such as loosening, misalignment, and uneven stress in the protective shell 5 during vibration or transportation. Moreover, the positioning plate 2, as an auxiliary orientation and stress buffer during installation, can distribute the stress borne by the protective shell 5 and the fixing plate 3 to a wider range. Furthermore, by pre-setting the positioning plate 2 on the tunneling machine housing 1, it can serve as a reference surface or guide surface during assembly, allowing the fixing plate 3 and the protective shell 5 to be installed smoothly within a certain tolerance range, facilitating on-site installation and maintenance.

[0030] like Figure 5As shown, the lower surface of the fixing plate 3 has a positioning groove 16 and an assembly hole 17. A positioning post 12 is provided on the positioning plate 2. The positioning plate 2 is connected to the positioning groove 16, and the positioning post 12 is connected to the assembly hole 17. Through the combined fit of the positioning groove 16 and the assembly hole 17, the sealing structure achieves precise engagement during installation, maintaining a high-precision assembly state during both initial installation and long-term use, preventing offset, misalignment, or skewness. Furthermore, the positioning groove 16 and the positioning plate 2 have surface contact, while the positioning post 12 and the assembly hole 17 have point-to-point contact. This suppresses relative sliding and rotation between the two structures, reducing the probability of loosening and ensuring stable and effective sealing over long-term operation.

[0031] like Figure 4 and Figure 5 As shown, the sealing structure also includes a fastening plate 10. One side of the fastening plate 10 is fixedly connected to the tunneling machine housing 1, and the other side of the fastening plate 10 is connected to the fixing plate 3. Multiple sets of protrusions 20 are evenly arranged in the width direction of the fastening plate 10. The protrusions 20 are used to enhance the sealing between the fastening plate 10 and the fixing plate 3.

[0032] In this embodiment, the fastening plate 10 serves as an intermediate transition layer connecting the tunneling machine housing 1 and the fixing plate 3. Multiple sets of raised strips 20 are provided between the fastening plate 10 and the fixing plate 3, and these raised strips 20 are evenly distributed along the width of the fastening plate 10, increasing the sealing contact area and pressing points, thus improving the overall sealing performance. Furthermore, the raised strips 20 form an elastic pressing distribution band through point-line contact, maintaining the pressing contact between the fastening plate 10 and the fixing plate 3 even with slight deformation, reducing the risk of leakage.

[0033] like Figures 2 to 5 As shown, a sealing gasket 11 is provided on the lower surface of the fixing plate 3. The sealing gasket 11 matches the fastening plate 10 and is used to enhance the sealing performance between the fastening plate 10 and the fixing plate 3. The fixing plate 3 and the fastening plate 10 are usually made of metal, and their contact is a rigid joint, which can easily lead to small gaps. The flexible sealing gasket 11 between the fixing plate 3 and the fastening plate 10 can fill the surface gaps during the compression process, preventing coal dust, powder, water mist, etc. from seeping into the electrical component area along the metal joint, thus achieving a good sealing effect. Moreover, the sealing gasket 11 is embedded under the fixing plate 3, and the protrusion 20 presses against the surface of the fixing plate 3, which can make the sealing gasket 11 more evenly stressed and more fully compacted, and can also improve the fatigue resistance and deformation resistance of the sealing gasket 11, extending the service life of the sealing gasket 11.

[0034] like Figures 2 to 5As shown, sealing layers 9 are provided on the inner surfaces of both the positioning groove 16 and the assembly hole 17 to enhance the sealing between the positioning plate 2 and the positioning groove 16, and to enhance the sealing between the positioning column 12 and the assembly hole 17. The fit between the positioning plate 2 and the fixing plate 3 is a metal-to-metal clearance fit, which is prone to producing tiny gaps under stress or deformation. By adding the sealing layer 9, this leakage path can be effectively sealed, preventing high concentrations of coal dust, water mist, and methane gas from intruding into the fit gap during downhole operations. Moreover, the sealing layer 9 not only serves to seal but also acts as a vibration damping agent. Adding the sealing layer 9 to the inner walls of the positioning groove 16 and the assembly hole 17 increases the assembly friction between the positioning plate 2 and the fixing plate 3, preventing loosening or gap formation due to vibration, and ensuring the sealing performance of the entire sealing structure.

[0035] like Figures 2 to 4 As shown, the sealing structure also includes a fastening structure 14. The fixing plate 3 is connected to the positioning plate 2 through the fastening structure 14, which is used to enhance the stability of the connection between the tunneling machine outer shell 1 and the protective shell 5. By adding the fastening structure 14, it is possible to ensure that the relative positions of each component do not shift, thereby improving the structural integrity and protective rigidity of the entire sealing structure.

[0036] like Figures 2 to 5 As shown, the sealing structure also includes an auxiliary sealing plate 13, which has a through hole 21. The upper end of the fixing plate 3 has a groove, and the auxiliary sealing plate 13 is fixedly installed in the groove. The positioning post 12 has a positioning hole 19, which has a thread. The axis of the through hole 21 coincides with the axis of the positioning hole 19. The fastening structure 14 passes through the through hole 21 and is threadedly connected to the positioning hole 19.

[0037] In this embodiment, aligning the axis of the through hole on the auxiliary sealing plate 13 with the axis of the positioning hole 19 on the positioning column 12 ensures alignment and precise guidance between the auxiliary sealing plate 13 and the positioning column 12 during the connection process. This facilitates rapid and reliable fastening operations in downhole environments, preventing hole misalignment or bolt skew, and improving the structural coaxiality and connection accuracy between the fixing plate 3 and the positioning plate 2. Furthermore, installing the auxiliary sealing plate 13 in the groove of the fixing plate 3 prevents water mist, coal dust, and gas from seeping into the positioning hole 19 along the path of the through hole 21 in high-humidity, high-dust, and high-pressure downhole environments, thereby improving the overall sealing performance of the sealing device.

[0038] like Figure 1 and Figure 2 As shown, the sealing structure also includes multiple sets of reinforcing plates 6, which are disposed inside the protective shell 5. One end of the reinforcing plate 6 is connected to the side wall of the protective shell 5, and the other end of the reinforcing plate 6 is connected to the top wall of the protective shell 5, in order to enhance the structural strength of the protective shell 5.

[0039] In this embodiment, by adding multiple sets of reinforcing plates 6 inside the protective shell 5, the side walls and top wall are connected, forming a multi-point support and force transmission path. This improves the overall rigidity and strength of the sealing structure, reduces the deformation of the protective shell 5 under external forces, and avoids problems such as shell rupture and seal failure caused by external impact or compression. Moreover, the reinforcing plates 6 provide structural support for the protective shell 5, enabling it to better disperse and bear stress when subjected to mechanical impact, vibration, and other conditions, reducing fatigue damage, extending the service life of the sealing structure, and reducing maintenance frequency and costs.

[0040] Optionally, the protective shell 5 has a square structure, and the sealing sleeve 7 fixedly connected to the upper surface of the protective shell 5 has a cylindrical structure. The inner cavity of the sealing sleeve 7 is adapted to the size of the surface of the antenna 8. At the same time, the lower end of the antenna 8 and the antenna base 4 are both located inside the protective shell 5, and multiple sets of reinforcing plates 6 are symmetrically connected to the upper end of the inner cavity of the protective shell 5. The protective shell 5 is made of plastic material, while the sealing sleeve 7 is made of soft rubber material.

[0041] Optionally, each of the reinforcing plates 6 has a rectangular structure, with a set of base plates fixedly connected to each end of the reinforcing plate 6. Both sets of base plates are elongated strips. One set of base plates is fixedly connected to the side of the inner cavity of the protective shell 5, and the other set of base plates is fixedly connected to the top of the inner cavity of the protective shell 5. At the same time, multiple sets of reinforcing plates 6 are fixedly connected parallel to each other along the length direction with equal spacing. The base plates and reinforcing plates 6 are combined to form a U-shaped structure. The reinforcing plates 6 are made of plastic.

[0042] Optionally, the fixing plate 3 fixedly connected to the outer side of the protective shell 5 has a U-shaped structure. The four sets of positioning grooves 16 symmetrically opened on the lower surface of the fixing plate 3 are all rectangular in structure, and the sealing layer 9 fixedly connected to the inner side of the positioning groove 16 has a U-shaped structure. At the same time, multiple sets of positioning holes are opened at equal intervals along the length direction at the top of the positioning groove 16. The sealing layer 9 is made of soft rubber.

[0043] Optionally, the fastening plate 10 has a U-shaped structure, and multiple sets of protrusions 20 are fixedly connected at equal intervals along the circumference direction on the upper surface of the fastening plate 10. Each set of protrusions 20 has a square structure, and multiple sets of protrusions 20 are combined together to form a U-shaped distribution. At the same time, the cross section of the protrusions 20 has a semi-circular structure.

[0044] Optionally, the positioning plate 2 has a rectangular structure, the upper end of the end face of the positioning plate 2 has an isosceles trapezoidal structure, and the positioning post 12 fixedly connected to the upper surface of the positioning plate 2 has a cylindrical structure, while the inner cavity of the positioning post 12 has a threaded structure. At the same time, the positioning plate 2 and the positioning post 12 are combined together to form an E-shaped structure.

[0045] The above description is merely an optional embodiment of this solution and is not intended to limit the solution. Various modifications and variations can be made to this solution by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution should be included within the scope of protection of this solution.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0048] In the description of this solution, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing this solution and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this solution. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0049] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0050] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this solution.

Claims

1. A sealing structure for protecting the antenna base (4) and antenna (8) on the outer casing (1) of a tunneling machine, characterized in that, The device includes a protective shell (5), a sealing plate (15), and a sealing sleeve (7). The sealing plate (15) is disposed on the outer shell (1) of the tunneling machine. A sealing groove (18) is provided at the lower end of the protective shell (5). The sealing plate (15) is sealed to the sealing groove (18). The protective shell (5) covers the antenna base (4) on the outer shell (1) of the tunneling machine. A through hole is provided at the upper end of the protective shell (5). The sealing sleeve (7) is fixedly disposed in the through hole. The antenna (8) passes through the sealing sleeve (7). The sealing sleeve (7) is used to fix the antenna (8) and seal the protective shell (5).

2. The sealing structure according to claim 1, characterized in that, The sealing structure also includes a fixing plate (3), which is fixedly connected to the side of the protective shell (5), and the lower surface of the fixing plate (3) is connected to the tunneling machine shell (1).

3. The sealing structure according to claim 2, characterized in that, The sealing structure also includes a positioning plate (2), which is disposed on the outer shell (1) of the tunneling machine and is connected to the fixing plate (3).

4. The sealing structure according to claim 3, characterized in that, The lower surface of the fixing plate (3) is provided with a positioning groove (16) and an assembly hole (17). The positioning plate (2) is provided with a positioning post (12). The positioning plate (2) is connected to the positioning groove (16), and the positioning post (12) is connected to the assembly hole (17).

5. The sealing structure according to claim 2, characterized in that, The sealing structure also includes a fastening plate (10), one side of which is fixedly connected to the tunneling machine housing (1), and the other side of which is connected to the fixing plate (3). The fastening plate (10) has multiple sets of protrusions (20) evenly arranged in the width direction. The protrusions (20) are used to enhance the sealing between the fastening plate (10) and the fixing plate (3).

6. The sealing structure according to claim 5, characterized in that, A sealing gasket (11) is provided on the lower surface of the fixing plate (3). The sealing gasket (11) matches the fastening plate (10). The sealing gasket (11) is used to enhance the sealing between the fastening plate (10) and the fixing plate (3).

7. The sealing structure according to claim 4, characterized in that, The inner surfaces of the positioning groove (16) and the assembly hole (17) are provided with sealing layers (9) to enhance the sealing between the positioning plate (2) and the positioning groove (16), and to enhance the sealing between the positioning post (12) and the assembly hole (17).

8. The sealing structure according to claim 4, characterized in that, The sealing structure also includes a fastening structure (14), through which the fixing plate (3) is connected to the positioning plate (2) to enhance the stability of the connection between the tunneling machine housing (1) and the protective shell (5).

9. The sealing structure according to claim 8, characterized in that, The sealing structure also includes an auxiliary sealing plate (13), on which a through hole (21) is provided. The upper end of the fixing plate (3) is provided with a groove. The auxiliary sealing plate (13) is fixedly installed in the groove. The positioning post (12) is provided with a positioning hole (19). The positioning hole (19) is provided with a thread. The axis of the through hole (21) coincides with the axis of the positioning hole (19). The fastening structure (14) passes through the through hole (21) and is threadedly connected to the positioning hole (19).

10. The sealing structure according to claim 1, characterized in that, The sealing structure also includes multiple sets of reinforcing plates (6), which are disposed inside the protective shell (5). One end of the reinforcing plate (6) is connected to the side wall of the protective shell (5), and the other end of the reinforcing plate (6) is connected to the top wall of the protective shell (5) to enhance the structural strength of the protective shell (5).

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