Dual-protection monitoring site device for existing subway tunnel vault

Abstract

The utility model relates to the technical field of subway tunnel monitoring equipment, and provides a dual-protection monitoring location device for an existing subway tunnel vault, which comprises a front shell, a rear shell, a prism body, an L-shaped frame, a rotating component and a dual-protection structure. The prism body is installed between the front shell and the rear shell, the front shell is connected with the L-shaped frame through the connecting shaft, the rotating assembly is used for adjusting the rotating angle of the front shell, and therefore the angle of the prism body is adjusted. And through a self-locking worm and gear structure, the angle of the prism body after adjustment is stable and is not influenced by external factors such as wind pressure and the like. The L-shaped frames are connected with the top of the tunnel through expansion bolts, the fixing strength is improved through cooperation of reinforcing plates, and connection looseness caused by wind pressure is avoided. In addition, the connecting rod is connected with the top of the tunnel through the mounting plate, dual protection is provided, and it is ensured that the device is still kept stable even if the expansion bolt is loosened. The device realizes the disassembly of the front and rear shells through the cooperation of the elastic clamping rods and the clamping grooves, and facilitates the replacement of the prism body.

Description

Technical Field

[0001] This utility model relates to the technical field of subway tunnel monitoring equipment, specifically to a dual-protection monitoring point device for the arch of an existing subway tunnel. Background Technology

[0002] The monitoring prism is an "optical target" for high-precision deformation monitoring in tunnel engineering. By reflecting the laser signal emitted by the total station, it acquires its own three-dimensional coordinate data in real time, forming a sensing network covering the tunnel structure. Its core value lies in capturing key deformations such as tunnel arch settlement, sidewall convergence (inward shrinkage), and surface displacement with sub-millimeter precision, providing data support for construction and operational safety.

[0003] In traditional L-shaped right-angle prism structures, the prism body is typically fixed to an L-shaped bracket via threaded knobs, and the L-shaped bracket is then secured to the tunnel ceiling with expansion bolts. While this design is simple, it has certain drawbacks in practical applications. Specifically, when the subway travels at high speed through the tunnel, the train's rapid movement generates significant wind pressure, which acts on the threaded connection over a prolonged period. Under this continuous wind pressure, the threaded knob connection is prone to loosening, causing the prism body to rotate. This affects its stability and working accuracy, and in severe cases, may cause the prism body to fall off, leading to equipment failure and impacting the accuracy of monitoring data.

[0004] Furthermore, the connection between the expansion bolt and the L-shaped bracket is relatively short, making the connection prone to wobbling or loosening under prolonged wind pressure. This structural design weakness results in insufficient fixation of the prism body, further increasing the risk of the prism body detaching and failing to effectively ensure the stability and reliability of the monitoring device. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a dual protection monitoring point device for the arch of existing subway tunnels. It solves the technical problems of the traditional L-shaped right-angle prism in the prior art, which is prone to loosening of the threaded knob connection under continuous wind pressure, resulting in the rotation of the prism body, affecting its stability and working accuracy, and in severe cases, the prism body may fall off, causing equipment failure and affecting the accuracy of monitoring data. It also addresses the technical problem that the connection position between the expansion bolt and the L-shaped bracket is too short, which makes the connection position prone to shaking or loosening under long-term wind pressure.

[0006] According to one aspect, at least one embodiment of the present invention provides a dual-protection monitoring point device for the arch of an existing subway tunnel, comprising:

[0007] A front shell, the rear wall of which is detachably fitted with a rear shell, and a prism body is installed between the front shell and the rear shell;

[0008] The L-shaped frame has a connecting shaft rotatably mounted on the top of the vertical side wall of the L-shaped frame, and the other end of the connecting shaft is fixedly connected to the front shell side wall. A mounting sleeve is fixed on one side of the bottom wall of the horizontal bar of the L-shaped frame, and a connecting rod is fixed on the other side of the bottom wall of the horizontal bar of the L-shaped frame. A mounting plate is fixed at the bottom end of the connecting rod, and a mounting hole is provided on the mounting plate.

[0009] A rotating assembly is fixed to the outer wall of the vertical rod of the L-shaped frame, and the rotating assembly is used to drive the front shell to rotate.

[0010] For example, in a dual protection monitoring point device for the arch of an existing subway tunnel provided by at least one embodiment of the present invention, a plurality of elastic locking rods are symmetrically fixed on the outer edge of the rear wall of the front shell, and a sliding groove that cooperates with the elastic locking rods is opened at the front end of the rear shell. A slot communicating with the outer wall of the rear shell is opened through the end of the sliding groove, and the end of the elastic locking rod is engaged in the corresponding slot.

[0011] For example, in a dual protection monitoring point device for the arch of an existing subway tunnel provided in at least one embodiment of the present invention, a limiting groove is provided on the outer wall of the rear shell, a movable ring is slidably installed in the limiting groove, and ear plates are symmetrically fixed on the outer side of the movable ring.

[0012] For example, in at least one embodiment of this utility model, a dual protection monitoring point device for the arch of an existing subway tunnel is provided, wherein the slot is connected to the limiting groove.

[0013] For example, in at least one embodiment of this utility model, a dual protection monitoring point device for the arch of an existing subway tunnel is provided. The rotating component includes a rotating shaft. One end of the rotating shaft passes through one side of the L-shaped frame through a bearing and is fixedly connected to one end of the connecting shaft. A worm gear is fixed on the shaft body of the rotating shaft. A mounting shell is fixed on the outer wall of the L-shaped frame corresponding to the position of the worm gear. A worm is meshed with the worm gear. The worm is rotatably installed between the inner walls of the mounting shell. The top end of the worm passes through the top wall of the mounting shell through a bearing and is fixed with a knob.

[0014] For example, in at least one embodiment of this utility model, a dual protection monitoring point device for the arch of an existing subway tunnel is provided, wherein a reinforcing plate is symmetrically fixed between the side wall of the mounting sleeve and the bottom wall of the L-shaped frame.

[0015] The beneficial effects of the embodiments of this utility model are as follows:

[0016] (1) In this utility model, the angle of the prism body can be smoothly adjusted by the design of the rotating component, and it can remain fixed after adjustment, avoiding the loosening problem caused by wind pressure or long-term use in the traditional threaded knob connection method. The self-locking mechanism of the worm gear and worm ensures the stability of the prism body after angle adjustment, so that the prism body can always maintain the correct working angle when the subway is running at high speed, ensuring the accuracy of the monitoring data.

[0017] (2) In this utility model, the L-shaped frame is connected to the top of the tunnel by expansion bolts. With the design of the mounting sleeve and reinforcing plate, the stability of the connection position is significantly enhanced, and the influence of external factors such as wind pressure on the connection part is prevented. This avoids the problems of expansion bolt loosening and L-shaped bracket shaking, thereby ensuring the firm installation of the prism body. By setting up the double protection of the connecting rod and expansion bolt, even if the expansion bolt is loosened, the connecting rod can still ensure that the L-shaped frame is firmly fixed to the top of the tunnel, further improving the reliability of the system and avoiding the risk of the prism body falling.

[0018] (3) In this utility model, the detachable design of the front shell and the rear shell makes the replacement of the prism body more convenient. With the cooperation of the movable ring and the elastic lever, the front shell and the rear shell can be quickly disassembled, which facilitates the removal and replacement of the prism body and greatly improves the efficiency and convenience of equipment maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0020] Figure 1 This is a perspective view of the external structure of this utility model;

[0021] Figure 2 This is a perspective view of the external structure of the front and rear shells in the separated state of this utility model;

[0022] Figure 3 This is a perspective view of the external structure of the rear shell and the movable ring in the separated state of this utility model;

[0023] Figure 4 This is a perspective view of the rotating component structure in this utility model;

[0024] In the diagram: 1. Front shell; 2. Rear shell; 3. Prism body; 4. L-shaped frame; 5. Connecting shaft; 6. Rotating assembly; 61. Rotating shaft; 62. Worm gear; 63. Mounting shell; 64. Worm; 65. Knob; 7. Mounting sleeve; 8. Reinforcing plate; 9. Connecting rod; 10. Mounting plate; 11. Mounting hole; 12. Elastic locking rod; 13. Slide groove; 14. Slot; 15. Limiting groove; 16. Movable ring; 17. Ear plate. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0026] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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 utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are 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. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-3 As shown, it illustrates a dual-protection monitoring point device for the arch of an existing subway tunnel according to one embodiment of the present invention, comprising:

[0032] A front shell 1, a rear shell 2 is detachably installed on the rear wall of the front shell 1, and a prism body 3 is installed between the front shell 1 and the rear shell 2.

[0033] L-shaped frame 4, with a connecting shaft 5 rotatably mounted on the top of the vertical side wall of L-shaped frame 4, the other end of the connecting shaft 5 being fixedly connected to the side wall of the front shell 1, a mounting sleeve 7 being fixed on one side of the bottom wall of the horizontal bar of L-shaped frame 4, a connecting rod 9 being fixed on the other side of the bottom wall of the horizontal bar of L-shaped frame 4, and a mounting plate 10 being fixed at the bottom end of the connecting rod 9, with mounting holes 11 provided on the mounting plate 10.

[0034] Rotating component 6 is fixed to the outer wall of the vertical rod of L-shaped frame 4 and is used to drive the front shell 1 to rotate.

[0035] A number of elastic locking rods 12 are symmetrically fixed on the outer edge of the rear wall of the front shell 1. The front end of the rear shell 2 is provided with a sliding groove 13 that cooperates with the elastic locking rods 12. The end of the sliding groove 13 is provided with a slot 14 that communicates with the outer wall of the rear shell 2. The end of the elastic locking rod 12 is engaged in the corresponding slot 14.

[0036] A limiting groove 15 is provided on the outer wall of the rear shell 2. A movable ring 16 is slidably installed in the limiting groove 15. Ear plates 17 are symmetrically fixed on the outer side of the movable ring 16.

[0037] The slot 14 is connected to the limiting groove 15.

[0038] A reinforcing plate 8 is symmetrically fixed between the side wall of the mounting sleeve 7 and the bottom wall of the L-shaped frame 4.

[0039] In this embodiment, the prism body 3 is installed through the front shell 1 and the rear shell 2. The front shell 1 is connected to the L-shaped frame 4 through the connecting shaft 5, and its rotation angle is adjusted by the rotating component 6. Compared with the traditional installation method of L-shaped right-angle prism, the rotating component 6 in this embodiment can ensure that the prism body 3 remains stable after the angle is adjusted. At the same time, the front shell 1 is connected to the L-shaped frame 4 and the rotating component 6 through the connecting shaft 5. Compared with the traditional threaded knob connection method, this setting method can effectively prevent the prism body 3 from accidentally detaching from the connection position of the L-shaped frame 4. In addition, the front shell 1 and the rear shell 2 in this embodiment are easy to install and disassemble, and the prism body 3 can be easily disassembled and replaced when damaged. When removing the prism body 3, the ear plates 17 on both sides of the movable ring 16 are squeezed to push the movable ring 16 towards the front shell 1. During the movement of the movable ring 16, the protruding part of the elastic locking rod 12 is squeezed out of the locking groove 14. At this time, the rear shell 2 can be smoothly pulled out away from the front shell 1, completing the disassembly of the front shell 1 and the rear shell 2, and then the prism body 3 can be smoothly removed for replacement. At the same time, in this embodiment, the L-shaped frame 4 is provided with a mounting sleeve 7 at the position of the expansion bolt, and a reinforcing plate 8 is provided in conjunction. This setting can greatly improve the connection strength between the expansion bolt and the L-shaped frame 4, and prevent the connection between the expansion bolt and the L-shaped frame 4 from loosening due to the wind pressure generated during the high-speed movement of the subway, which would affect the normal use of the prism body. At the same time, in this embodiment, a connecting rod 9 is also provided on one side of the L-shaped frame 4. The connecting rod 9 is fixed to the top of the tunnel with bolts through the mounting plate 10, forming a double protection with the expansion bolt. Even if the expansion bolt is accidentally lost, the connecting rod 9 can ensure that the L-shaped frame 4 is properly connected to the top of the tunnel, preventing the prism body 3 from falling.

[0040] like Figure 4 As shown, a rotating assembly 6 is illustrated in another embodiment of the present invention. The rotating assembly 6 includes a rotating shaft 61. One end of the rotating shaft 61 passes through one side of the L-shaped frame 4 via a bearing and is fixedly connected to one end of the connecting shaft 5. A worm gear 62 is fixed on the shaft body of the rotating shaft 61. A mounting shell 63 is fixed on the outer wall of the L-shaped frame 4 corresponding to the position of the worm gear 62. The rotating shaft 61 is rotatably mounted between the mounting shell 63 and the L-shaped frame 4. A worm 64 is meshed with the worm gear 62. The worm 64 is rotatably mounted between the inner walls of the mounting shell 63. The top end of the worm 64 passes through the top wall of the mounting shell 63 via a bearing and is fixedly mounted with a knob 65.

[0041] In this embodiment, the rotating component 6 is used to adjust the deflection angle of the front shell 1, thereby adjusting the deflection angle of the prism body 3, while ensuring that the position of the prism body 3 remains fixed after deflection. When adjusting the deflection angle of the prism body 3, the knob 65 is rotated, which drives the worm gear 64 to rotate. During the rotation of the worm gear 64, the connecting shaft 5 is driven to rotate through the worm wheel 62 and the rotating shaft 61, thereby causing the prism body 3 inside the front shell 1 to deflect. In this embodiment, the self-locking capability of the worm wheel 62 and the worm gear 64 can be used to ensure that the angle of the prism body 3 remains stable after adjustment and will not be affected by the wind pressure generated by the high-speed passage of the subway.

[0042] Working Principle: The prism body 3 is installed via a front shell 1 and a rear shell 2. The front shell 1 is connected to the L-shaped frame 4, and the rear shell 2 is fixed to the front shell 1 via an elastic locking rod 12 and a locking groove 14, ensuring that the prism body 3 is firmly fixed inside the device. After the prism body 3 is installed, the rotating component 6 is used to adjust the rotation angle of the front shell 1, thereby achieving precise adjustment of the angle of the prism body 3. The worm gear 62 and worm 64 inside the rotating component 6 use a self-locking mechanism to ensure that the angle of the prism body 3 remains stable after adjustment, preventing loosening or rotation caused by external factors such as wind pressure. At the same time, the L-shaped frame 4 is fixed to the tunnel top with expansion bolts. To prevent the expansion bolts from loosening due to wind pressure, the connection between the L-shaped frame 4 and the tunnel top is reinforced with an installation sleeve 7 and a reinforcing plate 8, which greatly improves the fixing strength and ensures that the device can remain stable when the subway passes at high speed. To further enhance safety, this invention also includes a connecting rod 9 on one side of the L-shaped frame 4. The connecting rod 9 is fixed to the tunnel top by the mounting plate 10, forming a double protection with the expansion bolts. This ensures that even if the expansion bolts accidentally loosen, the connecting rod 9 can still stabilize the L-shaped frame 4 and prevent the prism body 3 from falling off. When the prism body 3 needs to be replaced, by squeezing the ear plate 17 of the movable ring 16, the movable ring 16 is pushed to move along the limiting groove 15. The protruding part of the elastic locking rod 12 is squeezed out of the locking groove 14, and the rear shell 2 can then be smoothly separated from the front shell 1, allowing the prism body 3 to be removed for replacement. This design makes the disassembly and maintenance of the device more convenient.

[0043] 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 dual-protection monitoring point device for the arch of existing subway tunnels, characterized in that, include: A front shell (1) is provided, and a rear shell (2) is detachably installed on the rear wall of the front shell (1). A prism body (3) is installed between the front shell (1) and the rear shell (2). L-shaped frame (4), the top of the vertical side wall of the L-shaped frame (4) is rotatably mounted with a connecting shaft (5), the other end of the connecting shaft (5) is fixedly connected to the side wall of the front shell (1), one side of the bottom wall of the horizontal bar of the L-shaped frame (4) is fixed with an installation sleeve (7), the other side of the bottom wall of the horizontal bar of the L-shaped frame (4) is fixed with a connecting rod (9), the bottom end of the connecting rod (9) is fixed with an installation plate (10), and the installation plate (10) is provided with an installation hole (11). Rotating component (6), which is fixed on the outer wall of the vertical rod of the L-shaped frame (4), is used to drive the front shell (1) to rotate.

2. The dual-protection monitoring point device for the arch of an existing subway tunnel according to claim 1, characterized in that, The front shell (1) has several elastic locking rods (12) symmetrically fixed on the outer edge of the rear wall. The front end of the rear shell (2) is provided with a sliding groove (13) that cooperates with the elastic locking rod (12). The end of the sliding groove (13) is provided with a slot (14) that communicates with the outer wall of the rear shell (2). The end of the elastic locking rod (12) is engaged in the corresponding slot (14).

3. The dual-protection monitoring point device for the arch of an existing subway tunnel according to claim 2, characterized in that, The outer wall of the rear shell (2) is provided with a limiting groove (15), and a movable ring (16) is slidably installed in the limiting groove (15). Ear plates (17) are symmetrically fixed on the outer side of the movable ring (16).

4. The dual-protection monitoring point device for the arch of an existing subway tunnel according to claim 3, characterized in that, The slot (14) is connected to the limiting groove (15).

5. A dual-protection monitoring point device for the arch of an existing subway tunnel according to claim 1, characterized in that, The rotating assembly (6) includes a rotating shaft (61), one end of which passes through one side of the L-shaped frame (4) through a bearing and is fixedly connected to one end of the connecting shaft (5). A worm gear (62) is fixed on the shaft body of the rotating shaft (61). A mounting shell (63) is fixed on the outer wall of the L-shaped frame (4) corresponding to the position of the worm gear (62). A worm (64) is meshed with the worm gear (62). The worm (64) is rotatably mounted between the inner walls of the mounting shell (63). The top end of the worm (64) passes through the top wall of the mounting shell (63) through a bearing and is fixed with a knob (65).

6. The dual-protection monitoring point device for the arch of an existing subway tunnel according to claim 1, characterized in that, A reinforcing plate (8) is symmetrically fixed between the side wall of the mounting sleeve (7) and the bottom wall of the L-shaped frame (4).

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