A measuring tool for conveniently measuring a tail shield gap

Abstract

The application relates to a measuring tool for conveniently measuring a shield tail gap, belonging to the field of measuring tools, which is arranged at the tail of a shield tunneling machine and comprises a support, a supporting rod rotatably connected to the support, a detection rod detachably connected to the supporting rod, and a torsional spring arranged around one end of the rotation shaft of the supporting rod and an angle sensor connected to the other end of the rotation shaft. According to the detection value of the angle sensor and the lengths of the supporting rod and the detection rod, the distance between the tail of the shield tunneling machine and a pipe piece is obtained through calculation, the possibility of reducing the measurement result caused by environmental factors is reduced, and the measurement accuracy of the measuring tool is improved.

Description

Technical Field

[0001] This application relates to the field of measuring tools, and more particularly to a measuring tool for conveniently measuring shield tail clearance. Background Technology

[0002] During tunnel boring machine (TBM) construction, changes in the curvature of the TBM's propulsion path and the inconsistent extension length of the propulsion cylinders cause variations in the posture of the last assembled tunnel segment inside the TBM. This alters the gap between the inner wall of the tail shield and the outer diameter of the segment; this gap is known as the tail clearance. When the detected value of the tail clearance exceeds the allowable range, excessive compression between the tail shield and the segment can damage the tail shield sealing brush.

[0003] Currently, common methods for testing shield tail clearance mainly involve manual measurement using vernier calipers or measurement of the shield tail using optical instruments through visual recognition and conversion. However, manual measurement has low accuracy, and the soil in actual working conditions can easily affect the detection values ​​of optical instruments, resulting in low testing accuracy of the measuring tools. Therefore, improvements are needed. Utility Model Content

[0004] To address the aforementioned issues, this application provides a convenient measuring tool for measuring the shield tail gap.

[0005] This application provides a convenient measuring tool for measuring shield tail clearance, which adopts the following technical solution: A measuring tool for conveniently measuring the tail gap of a tunnel boring machine is provided at the tail of the machine. It includes a support, a support rod rotatably connected to the support, a detection rod detachably connected to the support rod, a torsion spring wound around one end of the support rod's rotating shaft, and an angle sensor connected to the other end.

[0006] By adopting the above technical solution, the distance between the tail of the tunnel boring machine and the tunnel lining segments is calculated based on the detection value of the angle sensor and the lengths of the support rod and the detection rod. This reduces the possibility of measurement results being reduced due to environmental factors, thereby improving the measurement accuracy of the measuring tool.

[0007] Preferably, the detection rod is connected to the support rod via a connecting assembly. The connecting assembly includes a connecting cover and a connecting post. The connecting cover is disposed at one end of the detection rod near the support rod. The support rod abuts against the inner wall of the connecting cover. A connecting groove is provided on the support rod, and the connecting post is disposed in the connecting groove.

[0008] By adopting the above technical solution, the worker inserts the connecting column into the connecting groove, and after the detection rod and support rod abut against each other, the connection between the detection rod and support rod is completed. Furthermore, the connecting cover at this time reduces the likelihood of external environmental influences affecting the connection between the support rod and the detection rod, thereby improving the connection stability between the detection rod and the support rod.

[0009] Preferably, a magnetic ring is embedded in the inner wall of the connecting groove, the connecting post passes through the magnetic ring, and the connecting post and the magnetic ring are magnetically attracted to each other.

[0010] By adopting the above technical solution, the magnetic ring and the connecting post cooperate to make the connecting post less likely to separate from the inner wall of the connecting groove, thereby further improving the connection stability between the detection rod and the support rod.

[0011] Preferably, the support is provided with a locking assembly for locking the support rod. The locking assembly includes a control plate, a locking plate, and a locking frame. The support has a control hole. The control plate is slidably connected in the control hole. The locking plate is connected to the control plate. The locking frame is disposed on the support rod. The locking plate abuts against the locking frame. A spring is provided in the control hole. One end of the spring is connected to the inner wall of the control hole, and the other end is connected to the control plate.

[0012] By employing the above technical solution, when locking the support rod is required, the worker rotates the support rod into the support. The worker then pulls the control plate, which compresses the spring. When the locking bracket and locking plate are aligned, the worker releases the control plate. Under the spring's rebound force, the control plate automatically resets and engages the locking plate with the locking bracket, thus limiting the support rod's position. At this point, the locking assembly reduces the possibility of damage to the support rod and detection rod when not in use.

[0013] Preferably, a bellows is sleeved on the outer side of the spring, one end of which is connected to the control plate and the other end is connected to the inner wall of the control hole.

[0014] By adopting the above technical solution, the bellows reduces the possibility of the spring being affected by the construction environment, which on the one hand extends the service life of the spring, and on the other hand provides convenience for the spring to be more stably controlled by the limit plate.

[0015] Preferably, the support is provided with a first protective shell, the pivot of the support rod extends into the first protective shell, and the torsion spring is disposed in the first protective shell.

[0016] By adopting the above technical solution, the first protective shell can easily protect the torsion spring, making the torsion spring less susceptible to the influence of the external environment.

[0017] Preferably, the support is provided with a second protective shell, the pivot of the support rod extends into the second protective shell, and the angle sensor is disposed in the second protective shell.

[0018] By adopting the above technical solution, the second protective shell provides protection for the angle sensor, making the angle sensor less susceptible to the influence of the external environment.

[0019] Preferably, the support is provided with a mounting plate, which is connected to the tail of the tunnel boring machine by bolts.

[0020] In summary, this application includes at least one of the following beneficial technical effects: By setting up a torsion spring and an angle sensor, the torsion spring causes the detection rod to abut against the segment. At the same time, based on the detection value of the angle sensor and the length of the detection rod and the support rod, the distance of the shield tail gap can be obtained, which reduces the possibility of the construction environment affecting the detection results and thus improves the measurement accuracy of the measuring tool. By setting up a connection component, workers can easily replace the detection rod, reducing the possibility of wear and tear on the detection rod after long-term use, which could lead to a decrease in measurement accuracy. By setting a locking component, the support rod is limited when it is not in use, which facilitates the subsequent use of the detection rod and the support rod. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a structural schematic diagram illustrating the positional relationship between the support, the first protective shell, and the second protective shell in an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Tail end of tunnel boring machine; 2. Support; 21. Control hole; 211. Spring; 212. Corrugated pipe; 22. Mounting plate; 23. First protective shell; 24. Second protective shell; 3. Support rod; 31. Torsion spring; 32. Angle sensor; 33. Connecting groove; 331. Magnetic ring; 4. Detection rod; 41. Soil-breaking block; 5. Connecting assembly; 51. Connecting cover; 52. Connecting column; 6. Locking assembly; 61. Control board; 62. Locking plate; 63. Locking frame. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0024] This application discloses a measuring tool for conveniently measuring the shield tail gap. (Refer to...) Figure 1 and Figure 2A measuring tool for conveniently measuring the shield tail gap is set at the tail 1 of the tunnel boring machine. It includes a support 2, a support rod 3 rotatably connected to the support 2, a detection rod 4 detachably connected to the support rod 3, a torsion spring 31 wound around one end of the rotating shaft of the support rod 3, and an angle sensor 32 connected to the other end.

[0025] Under the elastic force of the torsion spring 31, the detection rod 4 abuts against the tunnel segment. At this time, based on the detection value of the angle sensor 32 and the lengths of the support rod 3 and the detection rod 4, the distance of the shield tail gap can be obtained, reducing the possibility of the construction environment affecting the detection value and thus improving the measurement accuracy of the measuring tool.

[0026] Reference Figure 1 The detection rod 4 is equipped with a soil-breaking block 41, which allows the detection rod 4 to pass through part of the soil so that the detection rod 4 can detect the shield tail gap more accurately.

[0027] Reference Figure 2 The detection rod 4 is connected to the support rod 3 through the connecting assembly 5. The connecting assembly 5 includes a connecting cover 51 and a connecting post 52. The connecting cover 51 is located at one end of the detection rod 4 near the support rod 3. The support rod 3 abuts against the inner wall of the connecting cover 51. A connecting groove 33 is provided on the support rod 3, and the connecting post 52 is located in the connecting groove 33.

[0028] A magnetic ring 331 is embedded in the inner wall of the connecting groove 33, and the connecting post 52 passes through the magnetic ring 331, and the connecting post 52 and the magnetic ring 331 are magnetically attracted to each other.

[0029] When the detection rod 4 needs to be installed, the worker inserts the connecting post 52 into the connecting groove 33, causing the connecting post 52 to be magnetically attracted to the magnetic ring 331. After the detection rod 4 abuts against the connecting post 52, the connection between the detection rod 4 and the support rod 3 is completed. Furthermore, the magnetic ring 331 reduces the possibility of the detection rod 4 separating from the support rod 3. The connecting cover 51 also makes the connection between the detection rod 4 and the support rod 3 less susceptible to external environmental influences, thereby improving the connection stability between the detection rod 4 and the support rod 3.

[0030] Reference Figure 2 The support 2 is equipped with a locking assembly 6 for locking the support rod 3. The locking assembly 6 includes a control plate 61, a locking plate 62, and a locking frame 63. The support 2 has a control hole 21, and the control plate 61 is slidably connected in the control hole 21. The locking plate 62 is fixed to the control plate 61, and the locking frame 63 is mounted on the support rod 3, with the locking plate 62 abutting against the locking frame 63. A spring 211 is provided in the control hole 21, with one end of the spring 211 connected to the inner wall of the control hole 21 and the other end connected to the control plate 61.

[0031] When locking the support rod 3 is required, the worker rotates the support rod 3 into the support 2. The worker then pulls the control plate 61, which compresses the spring 211. When the locking bracket and the locking plate 62 are aligned, the worker releases the control plate 61. Under the rebound force of the spring 211, the control plate 61 automatically resets and engages the locking plate 62 with the locking bracket, thus limiting the position of the support rod 3. At this time, the locking assembly 6 reduces the possibility of damage to the support rod 3 and the detection rod 4 when not in use.

[0032] Reference Figure 2 A bellows 212 is fitted around the outer side of the spring 211. One end of the bellows 212 is connected to the control plate 61, and the other end is connected to the inner wall of the control hole 21. The bellows 212 reduces the possibility of the spring 211 being affected by the construction environment, which on the one hand extends the service life of the spring 211, and on the other hand provides convenience for the spring 211 to more stably limit the control plate 61.

[0033] Reference Figure 1 To facilitate the fixing of the support 2, an mounting plate 22 is fixed on the support 2, and the mounting plate 22 is connected to the tail end 1 of the tunnel boring machine by bolts.

[0034] Reference Figure 1 and Figure 2 The support 2 is provided with a first protective shell 23 and a second protective shell 24. One end of the rotating shaft of the support rod 3 extends into the first protective shell 23 and the other end extends into the second protective shell 24. The torsion spring 31 is disposed in the first protective shell 23 and the angle sensor 32 is disposed in the second protective shell 24.

[0035] The first protective shell 23 provides protection for the torsion spring 31, making it less susceptible to external environmental influences. The second protective shell 24 provides protection for the angle sensor 32, making it less susceptible to external environmental influences.

[0036] The implementation principle of the measuring tool for conveniently measuring the shield tail gap in this application embodiment is as follows: when it is necessary to detect the shield tail gap, the distance of the shield tail gap can be obtained based on the detection value of the angle sensor 32 and the lengths of the support rod 3 and the detection rod 4, which reduces the possibility of the construction environment affecting the detection value and thus improves the measurement accuracy of the measuring tool.

[0037] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A measuring tool for conveniently measuring the shield tail gap, disposed at the tail of a tunnel boring machine (1), characterized in that: Includes a support (2), on which a support rod (3) is rotatably connected, and a detection rod (4) is detachably connected to the support rod (3). One end of the support rod (3) is wound with a torsion spring (31), and the other end is connected to an angle sensor (32).

2. The measuring tool for conveniently measuring shield tail clearance according to claim 1, characterized in that: The detection rod (4) is connected to the support rod (3) through a connecting assembly (5). The connecting assembly (5) includes a connecting cover (51) and a connecting post (52). The connecting cover (51) is located at one end of the detection rod (4) near the support rod (3). The support rod (3) abuts against the inner wall of the connecting cover (51). A connecting groove (33) is provided on the support rod (3), and the connecting post (52) is located in the connecting groove (33).

3. The measuring tool for conveniently measuring shield tail clearance according to claim 2, characterized in that: The inner wall of the connecting groove (33) is fitted with a magnetic ring (331), and the connecting post (52) passes through the magnetic ring (331), and the connecting post (52) and the magnetic ring (331) are magnetically attracted to each other.

4. The measuring tool for conveniently measuring shield tail clearance according to claim 1, characterized in that: The support (2) is provided with a locking assembly (6) for locking the support rod (3). The locking assembly (6) includes a control plate (61), a locking plate (62) and a locking frame (63). The support (2) is provided with a control hole (21). The control plate (61) is slidably connected in the control hole (21). The locking plate (62) is connected to the control plate (61). The locking frame (63) is set on the support rod (3). The locking plate (62) abuts against the locking frame (63). The control hole (21) is provided with a spring (211). One end of the spring (211) is connected to the inner wall of the control hole (21) and the other end is connected to the control plate (61).

5. A measuring tool for conveniently measuring shield tail clearance according to claim 4, characterized in that: A bellows tube (212) is sleeved on the outside of the spring (211). One end of the bellows tube (212) is connected to the control plate (61), and the other end is connected to the inner wall of the control hole (21).

6. A measuring tool for conveniently measuring shield tail clearance according to claim 5, characterized in that: The support (2) is provided with a first protective shell (23), the pivot of the support rod (3) extends into the first protective shell (23), and the torsion spring (31) is provided in the first protective shell (23).

7. A measuring tool for conveniently measuring shield tail clearance according to claim 6, characterized in that: The support (2) is provided with a second protective shell (24), the pivot of the support rod (3) extends into the second protective shell (24), and the angle sensor (32) is disposed in the second protective shell (24).

8. A measuring tool for conveniently measuring shield tail clearance according to claim 7, characterized in that: The support (2) is provided with an mounting plate (22), which is connected to the tail (1) of the tunnel boring machine by bolts.

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