A tunnel segment assembly joint graphene displacement sensor mounting device and method

Abstract

This invention discloses an installation device for graphene displacement sensors in tunnel segment assembly joints. The device includes an installation cart, with a control box fixedly connected to its upper side. A drive motor is fixedly connected inside the control box. A telescopic cantilever is fixedly connected to one end of the drive motor's main shaft extending outside the control box. The telescopic end of the telescopic cantilever is fixedly connected to a housing. The outer arc surface of the housing has a through groove. Two control motors are fixedly connected to the outer ends of the housing, and two winding wheels are fixedly connected to the main shafts of the two control motors extending into the housing. A paper tape is connected between the two winding wheels, and multiple easy-tear frames are spaced apart on the paper tape. A graphene sensor is fixedly connected within each easy-tear frame. This invention involves applying adhesive by rubbing the two ends of the graphene sensor against the surface of a dispensing tube. A push-out device presses the graphene sensor onto the tunnel segment, causing it to separate from the easy-tear frames. This facilitates the installation of the graphene sensor and eliminates the need for working at heights.

Description

Technical Field

[0001] This invention relates to the field of tunnel segment displacement monitoring technology, and in particular to a graphene displacement sensor installation device and method for tunnel segment assembly joints. Background Technology

[0002] Prefabricated assembly structures are widely used in engineering construction, offering numerous advantages such as convenient and efficient construction.

[0003] After the tunnel segments are assembled, changes in external soil pressure can cause misalignment, displacement, and other changes. It is necessary to monitor these changes in a timely manner to detect potential safety hazards. For example, patent publication number CN114623757A proposes a graphene displacement sensor. This type of sensor is lightweight and convenient, but it still has some drawbacks such as requiring work at height and low installation efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a graphene displacement sensor installation device for tunnel segment assembly joints.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An installation device for a graphene displacement sensor in a tunnel segment assembly joint includes an installation vehicle. A control box is fixedly connected to the upper side of the installation vehicle. A drive motor is fixedly connected inside the control box. A telescopic cantilever is fixedly connected to one end of the drive motor's main shaft extending outside the control box. The telescopic end of the telescopic cantilever is fixedly connected to a housing. The outer arc surface of the housing has a through groove. A control motor is fixedly connected to each of the two outer ends of the housing. A winding wheel is fixedly connected to the main shaft of each of the two control motors extending into the housing. A paper tape is connected between the two winding wheels. The paper tape is spaced apart with multiple easy-tear frames. A graphene sensor is fixedly connected to each easy-tear frame. Two glue dispensing tubes are fixedly connected inside the housing, with the glue dispensing tubes corresponding to the two ends of the graphene sensor.

[0007] It also includes an ejection device for ejecting the graphene sensor from the through-slot.

[0008] Preferably, the ejection device includes an electric push rod, the telescopic end of which is fixedly connected to a support plate, the support plate is hinged to two inclined rods, and a first torsion spring is mounted on the hinge shaft of the inclined rods. Each inclined rod end is rotatably connected to a sponge pressure roller, the sponge pressure roller being set to correspond to the graphene sensor. A straight groove is fixedly connected to the inner wall of the housing, and an arc groove is provided at the end of the straight groove. The rotating shaft of the sponge pressure roller extends into the straight groove.

[0009] Preferably, the end of the inclined rod is fixedly connected to a support sleeve, the outside of the support sleeve is rotatably connected to a support rod, a second torsion spring is provided at the rotatable part of the support rod and the support sleeve, the end of the support rod is rotatably connected to a cleaning roller, and the shaft of the sponge pressure roller passes through the support sleeve and is rotatably connected to it.

[0010] Preferably, the support sleeve is equipped with a locking shaft device, the locking shaft device includes a side plate, the side plate is fixedly connected to the outside of the support rod, the side plate is slidably connected to the stepped shaft, a support spring is installed between the stepped surface of the stepped shaft and the side plate, the inclined rod is provided with a insertion hole, the stepped shaft is provided with a ball bearing in contact with the inclined rod, and the stepped shaft can be coaxial with the insertion hole.

[0011] Preferably, two cylinders are fixedly connected to the inner wall of the housing, and a crossbar is fixedly connected to one end of the two cylinders. A conical platform is provided at the end of the stepped shaft away from the insertion hole, and the crossbar can contact the conical surface of the conical platform.

[0012] Preferably, one side of the housing has an open structure, the main shaft of the control motor is fixedly connected to a key, and the inner hole of the winding wheel is provided with a slot, which is slidably engaged with the key.

[0013] The present invention also discloses a method for installing a graphene displacement sensor in a tunnel segment assembly joint, wherein the graphene sensor is installed using the above-mentioned installation device.

[0014] The advantages of this invention are as follows: The graphene displacement sensor installation device and method for tunnel segment assembly joints provided by this invention uses two control motors to drive one winding wheel to wind up and the other winding wheel to unwind, moving the graphene sensor to the corresponding position of the ejection device. When the paper tape and the corresponding graphene sensor are ejected from the through slot, both winding wheels unwind, and the two ends of the graphene sensor rub against the surface of the adhesive tube and are coated with adhesive. One end of the graphene sensor is pasted to a shield tunnel segment, and the other end is pasted to an adjacent shield tunnel segment. Then, both winding wheels wind up, and the ejection device presses the graphene sensor onto the segment, thus separating it from the easy-tear frame, completing the pasting of one monitoring position. When it is necessary to paste the next position, the installation vehicle can move, the telescopic cantilever can rotate, the paper tape is wound, and the next graphene sensor is moved to the position of the through slot. The operation is repeated for the next pasting, thereby improving the installation efficiency of the graphene sensor and eliminating the need for working at height.

[0015] This invention overcomes the influence of the cleaning roller by having the support rod roll to its furthest point. The support rod rotates relative to the inclined rod until the stepped shaft aligns with the insertion hole. Under the action of the support spring, the stepped shaft inserts into the insertion hole, forming a limit. This prevents the inclined rod from rotating relative to the support rod as it moves away from the tube sheet, allowing it to safely retract into the housing. Finally, the crossbar contacts the conical platform and slides relative to it to the bottom, lifting the conical platform and the stepped shaft. Under the reset action of the second torsion spring, they return to their initial state. This overcomes the influence of the cleaning roller, enabling continuous and repeated installation of graphene sensors, thus ensuring bonding quality while improving installation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the basic structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the ejection device in this invention;

[0018] Figure 3 This is a schematic diagram of the ejection state of the ejection device in this invention;

[0019] Figure 4 yes Figure 3 A magnified view of point M in the image. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Example 1

[0022] like Figure 1-4As shown, the present invention provides an installation device for a graphene displacement sensor at a tunnel segment assembly joint, comprising an installation vehicle 1, a control box 11 fixedly connected to the upper side of the installation vehicle 1, a drive motor fixedly connected inside the control box 11, and a telescopic cantilever 12 fixedly connected to one end of the drive motor's main shaft extending outside the control box 11. The telescopic cantilever 12 can be pneumatic or hydraulic. The telescopic end of the telescopic cantilever 12 is fixedly connected to a housing 3. The outer arc surface of the housing 3 is provided with a through groove 31. A control motor is fixedly connected to each of the two outer ends of the housing 3. A winding wheel 4 is fixedly connected to the main shaft of each of the two control motors extending into the housing 3. One side of the housing 3 is open. Paper tape 5 is connected between each winding wheel 4. The main shaft of the control motor is fixedly connected to a key 41. The inner hole of the winding wheel 4 is provided with a slot, which slides into the key 41 for easy replacement of new paper tape 5. Multiple easy-tear frames 51 are arranged at intervals on the paper tape 5. A graphene sensor 52 is fixedly connected in each easy-tear frame 51. Both ends of the paper tape 5 are provided with a blank section. The graphene sensor 52 and wireless monitoring technology are existing structures, specifically disclosed in patent publication number CN114440752A. Two glue dispensing tubes 6 are fixedly connected in the housing 3. Glue dispensing holes are evenly arranged on the outer circle of the glue dispensing tubes 6. The glue dispensing tubes 6 are set at both ends of the graphene sensor 52.

[0023] It also includes a push-out device 7, which is used to push out the graphene sensor 52 through the channel 31.

[0024] As shown in patent publication number CN114440752A, the graphene sensor 52 has clamps at both ends, and the clamps contain a battery, a PCB board, and a data processing module. The graphene tensile composite material between the two clamps plays a role in monitoring the change in the misalignment distance of the tunnel segments.

[0025] This invention is used for displacement monitoring of prefabricated structures, specifically for tunnel boring machine (TBM) segments. The housing 3 has an arc-shaped structure. In use, two control motors work together to drive one winding wheel 4 to wind the material while the other unwinds it, moving the graphene sensor 52 to the corresponding position on the ejection device 7. When the paper tape 5 and the corresponding graphene sensor 52 are ejected from the through slot 31, both winding wheels 4 unwind, and both ends of the graphene sensor 52 rub against the surface of the adhesive outlet 6 and are coated with adhesive. One end of the graphene sensor 52 is then attached to a TBM segment. The other end is pasted onto the adjacent shield tunnel segment, and then the winding wheel 4 rewinds the entire structure. The ejection device 7 presses the graphene sensor 52 onto the segment, which then separates from the easy-tear frame 51, completing the pasting of one monitoring position. When it is necessary to paste the next position, the installation vehicle 1 can move, the telescopic cantilever 12 can rotate, the paper tape 5 is wound around, and the next graphene sensor 52 is moved to the position of the through slot 31. The operation is repeated to paste the next position, which can improve the installation efficiency of the graphene sensor 52 and eliminate the need for climbing work.

[0026] Example 2

[0027] like Figure 1-4 As shown, the ejection device 7 includes an electric push rod 71, the telescopic end of which is fixedly connected to a support plate 72. The support plate 72 is hinged to two inclined rods 73, and a first torsion spring is mounted on the hinge shaft of the inclined rods 73. The end of each inclined rod 73 is rotatably connected to a sponge pressure roller 74. The sponge pressure roller 74 is set corresponding to the graphene sensor 52. A straight groove 75 is fixedly connected to the inner wall of the housing 3. An arc groove 76 is provided at the end of the straight groove 75. The rotating shaft of the sponge pressure roller 74 extends into the straight groove 75.

[0028] When the electric push rod 71 pushes the sponge roller 74 and the graphene sensor 52 outward, the shaft of the sponge roller 74 is initially located in the straight groove 75. The sponge roller 74 and the graphene sensor 52 extend out of the through groove 31 together. After the sponge roller 74 presses the graphene sensor 52 onto the surface of the tube, the shaft of the sponge roller 74 enters the arc groove 76. As the electric push rod 71 continues to push, the two sponge rollers 74 gradually separate due to the action of the inclined rod 73 and the arc groove 76, and accordingly roll outward at both ends of the graphene sensor 52, so that the graphene sensor 52 can be firmly attached to the surface of the tube and avoid falling off due to poor adhesion.

[0029] The end of the inclined rod 73 is fixedly connected to the support sleeve 77, and the outside of the support sleeve 77 is rotatably connected to the support rod 78. A second torsion spring is provided at the rotation point of the support rod 78 and the support sleeve 77. The end of the support rod 78 is rotatably connected to the cleaning roller 79. The cleaning roller 79 contains easily evaporating cleaning alcohol. The rotating shaft of the sponge roller 74 passes through the support sleeve 77 and is rotatably connected to it.

[0030] Example 3

[0031] like Figure 1-4 As shown, the support sleeve 77 is provided with a locking shaft device 8, which includes a side plate 81. The side plate 81 is fixedly connected to the outside of the support rod 78. The side plate 81 is slidably connected to the stepped shaft 82. A support spring 83 is installed between the stepped surface of the stepped shaft 82 and the side plate 81. The inclined rod 73 is provided with a socket 84. The stepped shaft 82 is provided with a ball bearing in contact with the inclined rod 73. The stepped shaft 82 can be coaxial with the socket 84.

[0032] Two cylinders 85 are fixedly connected to the inner wall of the housing 3. One end of the two cylinders 85 is fixedly connected to a crossbar 86. The end of the stepped shaft 82 away from the insertion hole 84 is provided with a conical platform 87, and the crossbar 86 can contact the conical surface of the conical platform 87.

[0033] For pipe segments, which are building structures, surface dust can easily cause poor adhesion. In this invention, a relatively inclined cleaning roller 79 is installed at the end of the inclined rod 73. When the inclined rod 73 approaches the pipe segment, the support rod 78 is in inclined contact with the pipe segment, so it slides outward to wipe the surface of the pipe segment. The second torsion spring of the support rod 78 allows the support rod 78 to eventually return to its original position. However, unlike the sponge pressure roller 74, which applies back pressure to the graphene sensor 52 when the electric push rod 71 returns to its original position, the cleaning roller 79, which has already rolled to a distance, will roll back to the surface of the graphene sensor 52 when it returns to its original position. Alcohol can have an adverse effect on the adhesion position, posing a risk that the graphene sensor 52 will fall off.

[0034] This invention overcomes the influence of the cleaning roller 79 by having the support rod 78 roll to its furthest point. The support rod 78 rotates relative to the inclined rod 73 until the stepped shaft 82 can engage with the insertion hole 84. Under the action of the support spring 83, the stepped shaft 82 inserts into the insertion hole 84, forming a limit. This prevents the inclined rod 73 from rotating relative to the support rod 78 as it moves away from the tube, allowing it to safely retract into the housing 3. Finally, the crossbar 86 contacts the conical platform 87 and slides relative to it to the bottom, lifting the conical platform 87 and the stepped shaft 82. Under the reset action of the second torsion spring, they return to their initial state. This overcomes the influence of the cleaning roller 79, enabling continuous and repeated installation of the graphene sensor 52, thus ensuring bonding quality while improving installation efficiency.

[0035] The present invention also discloses a method for installing a graphene displacement sensor in a tunnel segment assembly joint, wherein the graphene sensor 52 is installed using the above-mentioned installation device.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A graphene displacement sensor installation device for tunnel segment assembly joints, comprising an installation vehicle (1), a control box (11) fixedly connected to the upper side of the installation vehicle (1), a drive motor fixedly connected inside the control box (11), a telescopic cantilever (12) fixedly connected to one end of the drive motor extending outside the control box (11), a housing (3) fixedly connected to the telescopic end of the telescopic cantilever (12), and a through groove (31) provided on the outer arc surface of the housing (3), characterized in that: A control motor is fixedly connected to each of the two outer ends of the housing (3). A winding wheel (4) is fixedly connected to the main shaft of the two control motors that extend into the housing (3). A paper tape (5) is connected between the two winding wheels (4). Multiple easy-tear frames (51) are set at intervals on the paper tape (5). A graphene sensor (52) is fixedly connected in each easy-tear frame (51). Two glue dispensing tubes (6) are fixedly connected in the housing (3). The glue dispensing tubes (6) are set at both ends of the graphene sensor (52). It also includes an ejection device (7) for ejecting the graphene sensor (52) from the through-slot (31); The ejection device (7) includes an electric push rod (71), the telescopic end of the electric push rod (71) is fixedly connected to a support plate (72), the support plate (72) is hinged to two inclined rods (73), and a first torsion spring is mounted on the hinge shaft of the inclined rod (73). The end of each inclined rod (73) is rotatably connected to a sponge pressure roller (74), the sponge pressure roller (74) is set to correspond to the graphene sensor (52), the inner wall of the housing (3) is fixedly connected to a straight groove (75), the end of the straight groove (75) is provided with an arc groove (76), and the rotating shaft of the sponge pressure roller (74) extends into the straight groove (75); The end of the inclined rod (73) is fixedly connected to the support sleeve (77), the outside of the support sleeve (77) is rotatably connected to the support rod (78), a second torsion spring is provided at the rotation point of the support rod (78) and the support sleeve (77), the end of the support rod (78) is rotatably connected to the cleaning roller (79), and the rotating shaft of the sponge roller (74) passes through the support sleeve (77) and is rotatably connected to it.

2. A tunnel segment joint graphene displacement sensor mounting device according to claim 1, characterised in that: The support sleeve (77) is provided with a locking shaft device (8), which includes a side plate (81). The side plate (81) is fixedly connected to the outside of the support rod (78). The side plate (81) is slidably connected to the stepped shaft (82). A support spring (83) is installed between the stepped surface of the stepped shaft (82) and the side plate (81). The inclined rod (73) is provided with a socket (84). The stepped shaft (82) is in contact with the inclined rod (73) and is provided with a ball bearing. The stepped shaft (82) can be coaxial with the socket (84).

3. A tunnel segment joint graphene displacement sensor mounting device according to claim 2, characterised in that: Two cylinders (85) are fixedly connected to the inner wall of the housing (3). One end of the two cylinders (85) is fixedly connected to a crossbar (86). The step shaft (82) is provided with a conical platform (87) at the end away from the insertion hole (84). The crossbar (86) can contact the conical surface of the conical platform (87).

4. A tunnel segment joint graphene displacement sensor mounting device according to claim 3, characterised in that: The housing (3) has an open structure on one side, the main shaft of the control motor is fixedly connected to the key (41), and the inner hole of the winding wheel (4) is provided with a slot, which is slidably inserted into the key (41).

5. A method of installing a tunnel segment joint graphene displacement sensor, characterized by: The graphene sensor (52) is installed using the mounting device as described in claim 4.

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