Tunnel lining thickness detection device based on laser reflection

Abstract

The invention relates to the field of tunnel lining thickness detection, and particularly discloses a tunnel lining thickness detection device based on laser reflection, which comprises a moving mechanism, a driving mechanism and a measuring mechanism, and is characterized in that the moving mechanism comprises a moving frame assembly, and one end of the moving frame assembly is rotatably connected with a driving wheel assembly; the driving mechanism comprises a first sliding frame assembly and an air cylinder, and the first sliding frame assembly is clamped and embedded in the movable frame assembly in a sliding mode. According to the invention, non-contact measurement is carried out on the tunnel lining through the laser reflection principle, and the measurement mode not only avoids errors possibly caused by traditional contact measurement, but also greatly improves the measurement speed and efficiency; when the ground is flat, the position of the measuring mechanism can be automatically adjusted by controlling the air cylinder to work, so that the measuring mechanism can quickly and accurately reach a preset measuring point, and the automatic adjusting mode not only improves the measuring efficiency, but also reduces manual intervention and reduces the operation difficulty.

Description

Technical Field

[0001] The invention belongs to the field of tunnel lining thickness detection, in particular to a tunnel lining thickness detection device based on laser reflection. Background Art

[0002] Tunnel lining thickness detection is a crucial part of tunnel construction and subsequent maintenance. As the main supporting part of the tunnel structure, the thickness of the tunnel lining directly affects the stability and safety of the tunnel. Traditional detection methods such as direct measurement are accurate but destructive and will cause damage to the lining structure.

[0003] With the advancement of technology, non-contact measurement methods have gradually emerged, such as laser scanning, which uses the principle of laser ranging to quickly reconstruct a three-dimensional model of the target by recording the three-dimensional coordinate information of a large number of dense points on the surface of the measured object, thereby accurately measuring the thickness of the tunnel lining. This method not only avoids the destructiveness of traditional methods, but also greatly improves the speed and efficiency of measurement, providing a strong guarantee for the safe operation of tunnel projects.

[0004] When measuring different areas of a tunnel, traditional measuring devices need to be constantly moved. The transfer process is rather cumbersome, greatly affecting the operating efficiency of the staff. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a tunnel lining thickness detection device based on laser reflection to solve the problem that the traditional measuring device in the prior art needs to continuously move the position of the equipment when measuring the tunnel, and the transfer process is relatively cumbersome, which greatly affects the operating efficiency of the staff.

[0006] A tunnel lining thickness detection device based on laser reflection includes a moving mechanism, a driving mechanism and a measuring mechanism:

[0007] The moving mechanism comprises a moving frame assembly, one end of which is rotatably connected to a driving wheel assembly;

[0008] The driving mechanism comprises a first sliding frame assembly and a cylinder, wherein the first sliding frame assembly is slidably embedded in the moving frame assembly, one end of the cylinder is fixedly mounted on the moving frame assembly, and the other end of the cylinder is fixedly mounted on the first sliding frame assembly, the upper side of the first sliding frame assembly is slidably connected to the second sliding frame assembly, and one side of the second sliding frame assembly is also slidably connected to a clamping block assembly;

[0009] The measuring mechanism comprises a laser cross-section measuring instrument, and a tripod is installed at the bottom of the laser cross-section measuring instrument;

[0010] The tripod is clamped and embedded in a position between the second sliding frame assembly and the clamping block assembly.

[0011] Preferably, the mobile frame assembly comprises a mobile frame body, a mobile wheel is fixedly mounted on the bottom of the mobile frame body, and a rotating frame is also mounted on one side of the mobile frame body;

[0012] The driving wheel assembly comprises an adjusting bracket, and a driving wheel body is fixedly mounted on the outer side of the bottom of the adjusting bracket;

[0013] The adjusting bracket is fixedly mounted on the rotating frame by means of bolts.

[0014] Preferably, a handle assembly is rotatably provided on the upper side of the movable frame assembly;

[0015] The upper side of the movable frame body is also symmetrically provided with an axle rod 1 and a positioning groove 1;

[0016] The handle assembly comprises a handle 1, one end of which is fixedly connected to a rotating block;

[0017] The rotating block is rotatably embedded in the shaft rod 1, and an end of the handle 1 away from the rotating block can be embedded in the positioning groove 1.

[0018] Preferably, a guide block is fixedly mounted on the upper side of the movable frame assembly;

[0019] A guide rod is also fixedly mounted on the outer side of the movable frame body;

[0020] The first sliding frame assembly comprises a sliding frame 1, and a circular guide rod is fixedly mounted on the upper side of the sliding frame 1;

[0021] The second sliding frame assembly includes a sliding frame 2, a push block is fixedly installed at one end of the lower side, a limit rod is also fixedly installed on one side of the sliding frame 2, and a spring is sleeved on the outer side of the limit rod;

[0022] The clamping block assembly comprises a clamping block body, a guide ring is fixedly installed on the outer side of the clamping block body, and a square guide rod is fixedly installed on one end of the clamping block body;

[0023] The second limit sliding card of the sliding frame is embedded on the circular guide rod;

[0024] The guide ring is slidably clamped on the limiting rod, the spring drives the guide ring to move and approach the second sliding frame, and the square guide rod is slidably clamped on the second sliding frame;

[0025] One end of the cylinder is fixedly mounted on the moving frame body, and the other end of the cylinder is fixedly mounted on the sliding frame 1. When the cylinder drives the sliding frame 1 to move, it will drive the sliding frame 2 to move horizontally. The horizontal movement of the sliding frame 2 will cause the push block to abut against the guide block, and under the guidance of the guide block, the second sliding frame assembly and the clamping block assembly will move upward together with the measuring mechanism.

[0026] Preferably, a second positioning groove is provided on the outer side of one end of the square guide rod;

[0027] A second shaft rod is also installed on the second sliding frame;

[0028] The second sliding frame assembly is also rotatably connected to a positioning assembly;

[0029] The positioning assembly is rotatably engaged on the second shaft rod and can be embedded in the second positioning groove.

[0030] Preferably, the positioning assembly comprises a rotating shaft frame, and a positioning piece is fixedly mounted on the lower end of the rotating shaft frame;

[0031] The rotating shaft frame is rotatably embedded in the second shaft rod, and the positioning piece can be embedded in the second positioning groove.

[0032] Preferably, a handle three is fixedly mounted on the outer side of the rotating shaft frame.

[0033] Preferably, a second handle is fixedly mounted on the outer side of the clamping block body.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] Non-contact measurement of tunnel lining is carried out through the principle of laser reflection. This measurement method not only avoids the errors that may be caused by traditional contact measurement, but also greatly improves the speed and efficiency of measurement;

[0036] When the ground is flat, the position of the measuring mechanism can be adjusted by controlling the cylinder to reach the predetermined measuring point quickly and accurately. This automatic adjustment method not only improves the measurement efficiency, but also reduces manual intervention and reduces the difficulty of operation.

[0037] When the ground is uneven, the staff can manually release the limit of the tripod by the clamping block assembly, and flexibly adjust the position and angle of the measuring mechanism according to the actual situation. This manual adjustment method enables the device to adapt to more complex measurement environments and improves the flexibility and accuracy of measurement.

[0038] When the device moves in the tunnel, the cylinder and a series of transmissions control the rise of the sliding frame 2, so that the bottom of the tripod can be separated from the ground, thereby avoiding collision or scratching with the ground, effectively protecting the integrity and accuracy of the measuring mechanism, and greatly improving the transfer efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0041] Figure 3 It is a schematic diagram of the exploded structure of the mobile mechanism of the present invention;

[0042] Figure 4 It is a schematic diagram of the exploded structure of the driving mechanism of the present invention;

[0043] Figure 5 For the present invention Figure 4 A magnified view of middle;

[0044] Figure 6 It is a structural schematic diagram of the positioning assembly of the present invention;

[0045] Figure 7 It is a cross-sectional view of the positioning assembly of the present invention.

[0046] In the figure: 1, moving mechanism; 11, moving frame assembly; 111, moving frame body; 112, moving wheel; 113, rotating frame; 114, shaft rod 1; 115, positioning groove 1; 116, guide rod; 12, driving wheel assembly; 121, adjustment bracket; 122, driving wheel body; 13, handle assembly; 131, handle 1; 132, rotating block; 14, guide block; 2, driving mechanism; 21, first sliding frame assembly; 211, sliding frame 1; 212, circular guide rod; 2 2. Cylinder; 23. Second sliding frame assembly; 231. Sliding frame 2; 232. Push block; 233. Limit rod; 234. Spring; 235. Shaft rod 2; 24. Clamping block assembly; 241. Clamping block body; 242. Guide ring; 243. Square guide rod; 244. Positioning groove 2; 245. Handle 2; 25. Positioning assembly; 251. Rotating shaft frame; 252. Positioning sheet; 253. Handle 3; 3. Measuring mechanism; 31. Laser section measuring instrument; 32. Tripod. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] like Figures 1 to 5 As shown:

[0049] Embodiment 1: The present invention provides a tunnel lining thickness detection device based on laser reflection, comprising a moving mechanism 1, a driving mechanism 2 and a measuring mechanism 3:

[0050] The mobile mechanism 1 comprises a mobile frame assembly 11, one end of which is rotatably connected to a driving wheel assembly 12;

[0051] The driving mechanism 2 includes a first sliding frame assembly 21 and a cylinder 22. The first sliding frame assembly 21 is slidably embedded in the moving frame assembly 11. One end of the cylinder 22 is fixedly mounted on the moving frame assembly 11, and the other end of the cylinder 22 is fixedly mounted on the first sliding frame assembly 21. The upper side of the first sliding frame assembly 21 is slidably connected to the second sliding frame assembly 23, and one side of the second sliding frame assembly 23 is also slidably connected to the clamping block assembly 24.

[0052] The measuring mechanism 3 includes a laser cross-section measuring instrument 31, and a tripod 32 is installed at the bottom of the laser cross-section measuring instrument 31;

[0053] The tripod 32 is embedded in the position between the second sliding frame assembly 23 and the clamping block assembly 24;

[0054] The driving wheel assembly 12 drives the entire device to move along the tunnel to a suitable position and then stops; when reaching the suitable position;

[0055] When the ground is flat, the control cylinder 22 works to make the first sliding frame assembly 21 move horizontally, so that the driving mechanism 2 drives the measuring mechanism 3 to a suitable position for measurement;

[0056] When the ground is uneven, the clamping block assembly 24 is pulled to release the limit on the tripod 32, so that the staff can put down the measuring mechanism 3 and manually adjust the angle of the laser cross-section measuring instrument 31 for measurement.

[0057] Specifically, the mobile frame assembly 11 includes a mobile frame body 111, a mobile wheel 112 is fixedly installed at the bottom of the mobile frame body 111, and a rotating frame 113 is also installed on one side of the mobile frame body 111;

[0058] The driving wheel assembly 12 includes an adjusting bracket 121, and a driving wheel body 122 is fixedly mounted on the outer side of the bottom of the adjusting bracket 121;

[0059] The adjustment bracket 121 is fixedly mounted on the rotating frame 113 by means of bolts.

[0060] Specifically, a handle assembly 13 is rotatably provided on the upper side of the mobile frame assembly 11;

[0061] The upper side of the mobile frame body 111 is also symmetrically provided with an axle rod 114 and a positioning groove 115;

[0062] The handle assembly 13 includes a handle 131, one end of which is fixedly connected to a rotating block 132;

[0063] The rotating block 132 is rotatably engaged with the shaft rod 114 , and an end of the handle 1 131 away from the rotating block 132 can be engaged with the positioning groove 115 .

[0064] As can be seen from the above, the height and angle of the driving wheel body 122 are adjusted by adjusting the bolts on the bracket 121 to ensure that the device can move stably along the tunnel;

[0065] Handlebar 131 can push the device to a suitable position along the tunnel through the moving wheels 112;

[0066] When the device reaches the predetermined measuring position, it stops moving and the handle 131 is rotated to disengage from the positioning groove 115 and rotate around the shaft 114, thereby making it convenient for the staff to access the measuring mechanism 3.

[0067] Embodiment 2: This embodiment is basically the same as the previous embodiment, except that a guide block 14 is fixedly mounted on the upper side of the movable frame assembly 11;

[0068] A guide rod 116 is also fixedly mounted on the outer side of the mobile frame body 111;

[0069] The first sliding frame assembly 21 includes a sliding frame 1 211, and a circular guide rod 212 is fixedly installed on the upper side of the sliding frame 1 211;

[0070] The second sliding frame assembly 23 includes a second sliding frame 231, a push block 232 is fixedly installed at one end of the lower side of the second sliding frame 231, and a limit rod 233 is also fixedly installed on one side of the second sliding frame 231, and a spring 234 is sleeved on the outer side of the limit rod 233;

[0071] The clamping block assembly 24 includes a clamping block body 241, a guide ring 242 is fixedly installed on the outer side of the clamping block body 241, and a square guide rod 243 is fixedly installed on one end of the clamping block body 241;

[0072] The second sliding frame 231 is limited and slidably embedded in the circular guide rod 212;

[0073] The guide ring 242 is slidably engaged with the limiting rod 233, and the spring 234 drives the guide ring 242 to move and approach the second sliding frame 231, and the square guide rod 243 is slidably engaged with the second sliding frame 231;

[0074] One end of the cylinder 22 is fixedly mounted on the moving frame body 111, and the other end of the cylinder 22 is fixedly mounted on the sliding frame 1 211. The cylinder 22 drives the sliding frame 1 211 to move, which will drive the sliding frame 231 to move horizontally. The horizontal movement of the sliding frame 231 will cause the push block 232 to abut against the guide block 14, and under the guidance of the guide block 14, the second sliding frame assembly 23 and the clamping block assembly 24 move upward together with the measuring mechanism 3.

[0075] As can be seen from the above, when the measuring mechanism 3 needs to be transferred, the control cylinder 22 drives the sliding frame 1 211 to move horizontally and approach the moving frame body 111. The horizontal movement of the sliding frame 1 211 causes the circular guide rod 212 to drive the sliding frame 2 231 to move horizontally. When the sliding frame 231 moves horizontally, the second sliding frame assembly 23 drives the measuring mechanism 3 to move horizontally, thereby facilitating the use of the staff.

[0076] When the position needs to be transferred, the second sliding frame 231 is continuously driven to move horizontally so that the push block 232 abuts against the guide block 14. Under the guidance of the guide block 14, the second sliding frame 231 moves upward along the circular guide rod 212. When the second sliding frame 231 moves upward, the second sliding frame assembly 23 drives the measuring mechanism 3 to move upward, that is, the bottom of the tripod 32 is separated from the ground, so that the entire device will not cause damage to the tripod 32 when it moves in the tunnel.

[0077] When it is necessary to limit the tripod 32 through the second sliding frame assembly 23 and the clamping block assembly 24, the clamping block body 241 is moved to make the guide ring 242 slide along the limiting rod 233 and compress the spring 234. At the same time, the square guide rod 243 plays a guiding role to clamp the tripod 32 on the sliding frame 231. Loosening the clamping block body 241 will reset the spring 234 and drive the guide ring 242 to drive the clamping block body 241 to move. The movement of the clamping block body 241 will abut against the sliding frame 231, thereby fixing the tripod 32.

[0078] like Figure 6 and Figure 7 As shown:

[0079] Embodiment 3: This embodiment is basically the same as the previous embodiment, except that a second positioning groove 244 is provided on the outer side of one end of the square guide rod 243;

[0080] A second shaft rod 235 is also mounted on the second sliding frame 231;

[0081] The second sliding frame assembly 23 is also rotatably connected to a positioning assembly 25;

[0082] The positioning assembly 25 is rotatably engaged with the second shaft rod 235 and can be inserted into the second positioning groove 244 .

[0083] Specifically, the positioning assembly 25 includes a rotating shaft frame 251, and a positioning piece 252 is fixedly installed at the lower end of the rotating shaft frame 251;

[0084] The rotating shaft frame 251 is rotatably engaged with the second shaft rod 235 , and the positioning piece 252 can be engaged with the second positioning groove 244 .

[0085] Specifically, a handle 3 253 is fixedly mounted on the outer side of the rotating shaft frame 251 .

[0086] Specifically, a second handle 245 is fixedly mounted on the outer side of the clamping block body 241 .

[0087] As can be seen from the above, the rotating shaft frame 251 is rotated around the second shaft rod 235, and the positioning piece 252 is embedded in the second positioning groove 244, which can further position the clamping block assembly 24 to prevent the tripod 32 from falling off during the movement.

[0088] The handle three 253 can facilitate the rotation of the rotating shaft frame 251, and the handle two 245 can facilitate the movement of the clamping block body 241.

[0089] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0090] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0091] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0094] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0095] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tunnel lining thickness detection device based on laser reflection, characterized in that: It comprises a moving mechanism (1), a driving mechanism (2) and a measuring mechanism (3): The moving mechanism (1) comprises a moving frame assembly (11), one end of the moving frame assembly (11) being rotatably connected to a driving wheel assembly (12); The driving mechanism (2) comprises a first sliding frame assembly (21) and a cylinder (22); the first sliding frame assembly (21) is slidably embedded in the moving frame assembly (11); one end of the cylinder (22) is fixedly mounted on the moving frame assembly (11); the other end of the cylinder (22) is fixedly mounted on the first sliding frame assembly (21); the upper side of the first sliding frame assembly (21) is slidably connected to the second sliding frame assembly (23); one side of the second sliding frame assembly (23) is also slidably connected to the clamping block assembly (24); The measuring mechanism (3) comprises a laser cross-section measuring instrument (31), and a tripod (32) is installed at the bottom of the laser cross-section measuring instrument (31); The tripod (32) is embedded in a position between the second sliding frame assembly (23) and the clamping block assembly (24).

2. A tunnel lining thickness detection device based on laser reflection as claimed in claim 1, characterized in that: The moving frame assembly (11) comprises a moving frame body (111), a moving wheel (112) is fixedly mounted on the bottom of the moving frame body (111), and a rotating frame (113) is also mounted on one side of the moving frame body (111); The driving wheel assembly (12) comprises an adjusting bracket (121), and a driving wheel body (122) is fixedly mounted on the outer side of the bottom of the adjusting bracket (121); The adjustment bracket (121) is fixedly mounted on the rotating frame (113) by means of bolts.

3. A tunnel lining thickness detection device based on laser reflection as claimed in claim 2, characterized in that: A handle assembly (13) is rotatably provided on the upper side of the movable frame assembly (11); The upper side of the movable frame body (111) is also symmetrically provided with an axle rod (114) and a positioning groove (115); The handle assembly (13) comprises a handle 1 (131), one end of which is fixedly connected to a rotating block (132); The rotating block (132) is rotatably engaged with the shaft rod (114), and an end of the handle (131) away from the rotating block (132) can be engaged with the positioning groove (115).

4. A tunnel lining thickness detection device based on laser reflection as claimed in claim 2, characterized in that: A guide block (14) is also fixedly mounted on the upper side of the movable frame assembly (11); A guide rod (116) is also fixedly mounted on the outer side of the movable frame body (111); The first sliding frame assembly (21) comprises a sliding frame 1 (211), and a circular guide rod (212) is fixedly mounted on the upper side of the sliding frame 1 (211); The second sliding frame assembly (23) comprises a second sliding frame (231), a push block (232) is fixedly mounted on one end of the lower side of the (321), a limiting rod (233) is also fixedly mounted on one side of the second sliding frame (231), and a spring (234) is sleeved on the outer side of the limiting rod (233); The clamping block assembly (24) comprises a clamping block body (241), a guide ring (242) is fixedly mounted on the outer side of the clamping block body (241), and a square guide rod (243) is fixedly mounted on one end of the clamping block body (241); The second sliding frame (231) is limitedly slidably embedded on the circular guide rod (212); The guide ring (242) is slidably engaged with the limiting rod (233), the spring (234) drives the guide ring (242) to move and approach the second sliding frame (231), and the square guide rod (243) is slidably engaged with the second sliding frame (231); One end of the cylinder (22) is fixedly mounted on the moving frame body (111), and the other end of the cylinder (22) is fixedly mounted on the sliding frame 1 (211). The cylinder (22) drives the sliding frame 1 (211) to move, which drives the sliding frame 2 (231) to move horizontally. The horizontal movement of the sliding frame 2 (231) causes the push block (232) to abut against the guide block (14), and under the guidance of the guide block (14), the second sliding frame assembly (23) and the clamping block assembly (24) move upward together with the measuring mechanism (3).

5. A tunnel lining thickness detection device based on laser reflection as claimed in claim 4, characterized in that: A second positioning groove (244) is formed on the outer side of one end of the square guide rod (243); A second shaft rod (235) is also mounted on the second sliding frame (231); The second sliding frame assembly (23) is also rotatably connected to a positioning assembly (25); The positioning assembly (25) is rotatably engaged with the second shaft rod (235) and can be engaged with the second positioning groove (244).

6. A tunnel lining thickness detection device based on laser reflection as claimed in claim 5, characterized in that: The positioning assembly (25) comprises a rotating shaft frame (251), and a positioning piece (252) is fixedly mounted on the lower end of the rotating shaft frame (251); The rotating shaft frame (251) is rotatably engaged with the second shaft rod (235), and the positioning piece (252) can be engaged with the second positioning groove (244).

7. A tunnel lining thickness detection device based on laser reflection as claimed in claim 6, characterized in that: A handle three (253) is fixedly mounted on the outer side of the rotating shaft frame (251).

8. A tunnel lining thickness detection device based on laser reflection as claimed in claim 6, characterized in that: A second handle (245) is also fixedly mounted on the outer side of the clamping block body (241).

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