A fiber grating expansion joint testing device for civil engineering

Abstract

The present invention relates to the technical field of expansion joint testing, and discloses a fiber optic Bragg grating expansion joint testing device for civil engineering, comprising a top plate, a switching component arranged on a side of the top plate away from a display, a detection component arranged on the switching component, and a cleaning component arranged on the switching component; by lowering the cleaning component into the expansion joint, a guide block and a locking rod contact the expansion joint, a plug-in hole is opened, and an elastic strip is guided by a guide groove, so that the elastic strip passes through a gap between a stone and the bottom of the expansion joint, and the elastic strip is extended to be inserted into the plug-in hole, and the elastic strip is limited by a locking column. At this time, the cleaning component will rise as a whole, and the elastic strip will carry the stone dropped into the expansion joint out of the expansion joint, thereby preventing the stone from moving to the bottom of the rubber strip when the gap of the rubber strip increases due to heat, resulting in the expansion joint being unable to expand and contract normally due to thermal expansion and contraction, thereby improving the flexibility and adaptability of the expansion joint and ensuring the expansion and contraction performance of the expansion joint.

Description

Technical Field

[0001] The invention relates to the technical field of expansion joint testing, in particular to a fiber optic Bragg grating expansion joint testing device for civil engineering. Background Art

[0002] Expansion joints, also known as temperature joints, are a structural measure commonly used in construction projects.

[0003] Patent publication number CN110296675A discloses a fiber Bragg grating expansion joint testing device for civil engineering. The base plate contacts the surface of the crack and generates a certain force. The force is transmitted to the interior of the micro-spring wire through the action of the silicone filling plate and the cavity. The sandwich plate acts on the surface of the positioning rod, pushing the outer shell to slide on the surface of the supporting short column, realizing the double-sided compression function of the test device and improving the accuracy of the test device during use.

[0004] The above-mentioned test device directly places the test device body on the cracks in the ground to test the performance of the expansion joint. Since there are vehicles passing by on the ground for a long time, the stones carried in the anti-skid grooves of the vehicle wheels are thrown out during the high-speed rotation of the wheels. The splashed stones will pass through the cracks in the ground and enter the expansion joint. When the rubber strip in the expansion joint expands due to heat, the stones will fall to the bottom of the rubber strip, causing the stones to be stuck at the bottom of the rubber strip; therefore, when the expansion joint contracts due to cold, the stones are stuck in the rubber strip, causing the expansion joint to be unable to expand and contract normally, reducing the flexibility and adaptability of the expansion joint. Summary of the Invention

[0005] The purpose of the present invention is to provide a fiber Bragg grating expansion joint testing device for civil engineering to solve the problems mentioned in the above process.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a fiber Bragg grating expansion joint testing device for civil engineering, comprising a top plate, a display disposed on the upper surface of the top plate, a switching assembly disposed on a side of the top plate away from the display, a detection component disposed on the switching assembly, a maintenance component disposed on the detection component, and a cleaning component disposed on the switching assembly;

[0007] The cleaning component includes a moving rod, a guide block arranged in the middle area of ​​the lower end of the moving rod, two guide grooves arranged in the guide block, a locking rod arranged on both sides of the lower surface of the moving rod, and two elastic strips arranged in the middle area of ​​the lower surface of the moving rod. The elastic strips are inserted into the guide grooves and guided by the guide grooves so that the elastic strips extend toward the direction of the locking rods. The elastic strips are used to extend to the lower end of the stones that have fallen into the expansion joint.

[0008] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering according to the present invention, the cleaning component further comprises a guide rod 1 arranged in the middle area of ​​a lower surface of the moving rod, the guide rod 1 is located between the two elastic strips, the end of the guide rod 1 away from the moving rod 1 is inserted into the guide block, a spring 1 is arranged on the outside of the guide rod 1, one end of the spring 1 is connected to the moving rod 1, and the end of the spring 1 away from the moving rod 1 is connected to the end of the guide block close to the moving rod 1.

[0009] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering according to the present invention, a plurality of lock holes are provided on the end of the elastic strip away from the moving rod one, a slide groove is provided on the end of the locking rod away from the moving rod one, an inserting hole is provided at the end of the locking rod away from the moving rod one, the inserting hole passes through the slide groove, a locking tongue is provided in the slide groove, a through hole is provided in the middle area of ​​the locking tongue, and a lock column is provided on the wall of the through hole and close to the middle area of ​​one side of the bottom of the slide groove.

[0010] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering described in the present invention, the detection component includes two moving rods, a fixed block arranged in the middle area of ​​the lower surface of the two moving rods, an air box arranged at the lower end of the fixed block away from the end of the two moving rods, two guide rods arranged on both sides of a side of the air box close to the fixed block, two springs arranged on the outside of the two guide rods, the end of the two guide rods away from the air box is inserted into the fixed block, and a heating iron is provided at the end of the air box away from the fixed block.

[0011] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering according to the present invention, the device comprises: a partition arranged in the middle area of ​​the inner cavity of the air box, the partition dividing the inner cavity of the air box into two air cavities, an expansion airbag arranged at both ends of the air box, the expansion airbag being connected to the interior of the air cavity, and a movable plate arranged on both sides of the expansion airbag.

[0012] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering described in the present invention, it comprises: a mounting plate arranged on the two movable plates close to one end of the movable rod 2, a detector arranged on the mounting plate, two detectors on adjacent movable plates are symmetrically arranged, the two detectors are electrically connected to the display, two groups of brackets are arranged at both ends of the movable rod 2, two guide rods 3 are arranged on the brackets, the guide rod 3 passes through the two movable plates, a spring 3 is arranged on the guide rod 3, the spring 3 is located between the two movable plates, and the two ends of the spring 3 are respectively connected to the sides of the two movable plates close to each other.

[0013] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering described in the present invention, wherein: the maintenance component includes a storage tank, the storage tank is arranged on both sides of the lower surface of the second moving rod, the storage tank is filled with a rubber protective agent, a plurality of liquid outlets are arranged at the end of the storage tank away from the second moving rod, a guide tube is arranged at the end of the storage tank away from the second moving rod, an elastic tube is arranged at the end of the storage tank away from the second moving rod, the elastic tube is located in the guide tube, a guide part is arranged at the end of the elastic tube away from the storage tank, a discharge box is arranged at the end of the guide tube away from the storage tank, two push blocks are arranged in the discharge box, and discharge pipes are arranged on both sides of the discharge box.

[0014] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering according to the present invention, the maintenance component further comprises a push rod, the push rod passes through the storage tank, the guide portion and the discharge box, an opening and closing plate is arranged at one end of the push rod, the opening and closing plate is arranged in the storage tank, a retaining ring is arranged in the middle area of ​​the push rod, the retaining ring is located between the guide portion and the storage tank, a driving block is arranged at one end of the push rod away from the opening and closing plate and the retaining ring, and the driving block is located in the discharge box.

[0015] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering according to the present invention, the switching component includes guide plates arranged at both ends of the top plate away from the display, two wire grooves are symmetrically provided on the guide plate, two arc grooves are symmetrically provided on the guide plate, two wire grooves are arranged between the two arc grooves, areas of the two arc grooves close to the top plate are far away from each other, and areas of the arc grooves away from the top plate are close to each other relative to areas of the arc grooves close to the top plate.

[0016] As a preferred solution of the fiber optic Bragg grating expansion joint testing device for civil engineering according to the present invention, wherein: a sliding bar is provided for sliding in the wire groove, a rack is fixedly installed on the side of the sliding bar away from the guide plate, a gear is provided on the side of the two guide plates away from each other and located in the middle area of ​​the guide plate, the rack is meshed with the gear, a driven block is provided on the end of the sliding bar away from the top plate, and the driven block is located on the side of the two guide plates close to each other, a transverse plate is slidably provided on the driven block, a sliding rod is provided on the transverse plate on the side of the guide plate, the sliding rod is slidably provided in the arc groove, one end of the moving rod is connected to a group of transverse plates, and the second end of the moving rod is connected to another group of transverse plates, a support is provided on the side of one guide plate close to the gear, and a handle is provided on the support, and the handle is coaxially connected to the gear.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By turning the handle clockwise, the cleaning component is lowered into the expansion joint. At this time, the guide block and the locking rod are in contact with the expansion joint. At this time, the lock tongue moves and the plug-in hole opens. The guide groove is used to guide the elastic strip, causing the elastic strip to pass through the gap between the stone and the bottom of the expansion joint and extend into the plug-in hole. By turning the handle counterclockwise, the lock tongue is reset, and the lock column limits the elastic strip. At this time, the cleaning component will rise as a whole and the elastic strip will carry the stone dropped into the expansion joint out of the expansion joint, thereby preventing the stone from moving to the bottom of the rubber strip when the gap of the rubber strip increases due to heat, causing the expansion joint to be unable to expand and contract normally due to heat expansion and contraction, thereby improving the flexibility and adaptability of the expansion joint, further preventing the stone from damaging the surface of the rubber strip when moving in the expansion joint, and ensuring the expansion performance of the expansion joint;

[0019] 2. By turning the handle counterclockwise, the cleaning component gradually rises and the detection component descends into the expansion joint under the guidance of the switching assembly. By turning on the power, the temperature of the heating iron increases, causing the rubber strip to expand, resulting in a change in the gap of the expansion joint. The volume of the gas inside the expansion airbag increases due to the heat, causing the expansion airbag to drive the moving plates on both sides to fit closely with the two sides of the expansion joint gap, thereby causing the spacing between the fiber gratings on the two moving plates to change, thereby testing the expansion and contraction performance of the expansion joint and improving the accuracy of the test results.

[0020] 3. The detection component is lowered into the expansion joint, so that one end of the push rod is blocked by the expansion joint and moves toward the moving rod. At this time, the opening and closing plate will be separated from the bottom of the storage tank, and the rubber protective agent in the storage tank will leak from the guide tube through the liquid outlet into the discharge box. When the detection component is tested and leaves the expansion joint, the push rod will gradually reset and cause the driving block to push the push block to move in opposite directions, so that the rubber protective agent in the discharge box is squeezed by the push block and diverted to the discharge pipe for discharge, so that the rubber protective agent protects the rubber strip, avoids the rubber strip from being exposed to the outside for a long time, and causes the rubber strip to harden, thereby ensuring the expansion and contraction performance of the rubber strip, improving the flexibility and adaptability of the expansion joint, and further improving the service life and working performance of the expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the fiber Bragg grating expansion joint testing device for civil engineering of the present invention.

[0022] Figure 2 This is a schematic structural diagram of a partial half-section of the cleaning components of the fiber Bragg grating expansion joint testing device for civil engineering of the present invention.

[0023] Figure 3This invention is a fiber grating expansion joint testing device for civil engineering Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0024] Figure 4 This invention is a fiber grating expansion joint testing device for civil engineering Figure 2 Schematic diagram of the structure enlarged at point B.

[0025] Figure 5 The figure is a schematic structural diagram of the detection components of the fiber Bragg grating expansion joint testing device for civil engineering of the present invention.

[0026] Figure 6 This is a schematic structural diagram of a half-section of the air box of the fiber Bragg grating expansion joint testing device for civil engineering of the present invention.

[0027] Figure 7 This is a schematic structural diagram of a half-section view of the maintenance components of the fiber Bragg grating expansion joint testing device for civil engineering of the present invention.

[0028] Figure 8 The figure is a schematic structural diagram of the top rod of the fiber Bragg grating expansion joint testing device for civil engineering of the present invention.

[0029] Figure 9 This is a structural schematic diagram of a left view of a switching assembly of a fiber Bragg grating expansion joint testing device for civil engineering according to the present invention.

[0030] Figure 10 This is a structural schematic diagram of the right side of the switching component of the fiber Bragg grating expansion joint testing device for civil engineering of the present invention.

[0031] In the picture:

[0032] 1. Top plate; 11. Display;

[0033] 2. Switching assembly; 21. Guide plate; 211. Wire slot; 212. Arc slot; 22. Follower block; 23. Transverse plate;

[0034] 3. Detection component; 31. Moving rod 2; 32. Fixed block; 33. Air box; 331. Partition plate; 34. Heating iron; 35. Inflatable air bag; 36. Moving plate; 37. Detector;

[0035] 4. Maintenance components; 41. Storage tank; 42. Guide tube; 43. Elastic tube; 431. Guide part; 44. Discharge box; 441. Push block; 442. Discharge pipe; 45. Push rod; 451. Opening and closing plate; 452. Drive block;

[0036] 5. Cleaning parts; 51. Moving rod 1; 511. Elastic strip; 512. Guide rod 1; 52. Guide block; 521. Guide groove; 53. Lock rod; 531. Slide groove; 532. Connecting hole; 54. Lock tongue; 541. Lock column. DETAILED DESCRIPTION

[0037] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm proposed below, but covers any modification, replacement, and improvement of elements, components, and algorithms without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and techniques are not shown to avoid causing unnecessary ambiguity to the present invention.

[0038] Example 1

[0039] Reference Figure 1-4 , which is a first embodiment of the present invention, provides a fiber Bragg grating expansion joint testing device for civil engineering, the fiber Bragg grating expansion joint testing device for civil engineering comprising a top plate 1, a display 11 disposed on the upper surface of the top plate 1, a switching assembly 2 disposed on a side of the top plate 1 away from the display 11, a detection component 3 disposed on the switching assembly 2, a maintenance component 4 disposed on the detection component 3, and a cleaning component 5 disposed on the switching assembly 2;

[0040] The cleaning component 5 includes a moving rod 51, a guide block 52 arranged in the middle area of ​​the lower end of the moving rod 51, two guide grooves 521 arranged in the guide block 52, a locking rod 53 arranged on both sides of the lower surface of the moving rod 51, and two elastic strips 511 arranged in the middle area of ​​the lower surface of the moving rod 51. The elastic strip 511 is inserted into the guide groove 521, and the elastic strip 511 is guided by the guide groove 521 so that the elastic strip 511 extends toward the direction of the locking rod 53. The elastic strip 511 is used to extend to the lower end of the stone that has fallen into the expansion joint.

[0041] The cleaning component 5 also includes a guide rod 512 arranged in the middle area of ​​the lower surface of the moving rod 51, the guide rod 512 is located between the two elastic strips 511, and the end of the guide rod 512 away from the moving rod 51 is inserted into the guide block 52, and a spring 1 is arranged on the outside of the guide rod 512, one end of the spring 1 is connected to the moving rod 51, and the end of the spring 1 away from the moving rod 51 is connected to the end of the guide block 52 close to the moving rod 51. When the end of the guide block 52 away from the moving rod 51 contacts the bottom of the expansion joint, the spring 1 will be squeezed and deformed and contracted, causing the moving rod 51 to continue to move toward the expansion joint, thereby making the elastic strip 511 continue to penetrate deeper into the guide block 52, so as to make the elastic strip 511 in the continuously penetrating guide block 52 extend along the gap of the expansion joint under the guidance of the guide groove 521, and finally pass through the gap between the stone dropped into the expansion joint and the expansion joint.

[0042] A plurality of lock holes are provided on the end of the elastic strip 511 away from the moving rod 51, and a sliding groove 531 is provided on the end of the locking rod 53 away from the moving rod 51, and an insertion hole 532 is provided at the end of the locking rod 53 away from the moving rod 51, and the insertion hole 532 passes through the sliding groove 531, and a lock tongue 54 is provided in the sliding groove 531, and a through hole is provided in the middle area of ​​the lock tongue 54. The through hole has a rectangular structure, and a lock column 541 is provided on the wall of the through hole and close to the middle area of ​​the bottom of the sliding groove 531. A spring piece is provided in the sliding groove 531, and one end of the spring piece is connected to the bottom of the sliding groove 531, and the end of the spring piece away from the bottom of the sliding groove 531 is connected to the end of the lock tongue 54 close to the bottom of the sliding groove 531.

[0043] During use, first place the device body on the ground at the point to be tested, and adjust the test body so that the expansion joint to be tested is located between the test device bodies, and lower the cleaning component 5 into the expansion joint by switching the assembly 2;

[0044] When the moving rod 51 descends until the end of the guide block 52 away from the moving rod 51 penetrates into the expansion joint and contacts the rubber strip in the expansion joint, the guide block 52 will be limited. As the moving rod 51 continues to descend, the moving rod 51 will push the elastic strip 511 to slide along the guide groove 521. At this time, the elastic strip 511 will move toward the locking rod 53 under the guidance of the guide groove 521. During the movement of the elastic strip 511, the elastic strip 511 will pass through the gap between the stone that has fallen into the expansion joint and is stuck on the rubber strip and the rubber strip.

[0045] Then the lock rod 53 drives the lock tongue 54 to contact the rubber strip, and then the spring piece contracts, and the lock tongue 54 slides in the slide groove 531, thereby opening the insertion hole 532, causing the end of the elastic strip 511 away from the moving rod 51 to be inserted into the insertion groove;

[0046] Then control the switching component to raise the cleaning component. At this time, the lock tongue 54 is separated from the rubber strip, and the spring will push the lock tongue 54 to reset. At this time, the lock column 541 will pass through the lock hole, so that when the guide column separates the rubber strip, the elastic strip 511 will not reset. At this time, as the cleaning component 5 is continuously lifted, the elastic strip 511 will carry the stones that have fallen onto the rubber strip and clean them out of the expansion joint.

[0047] Example 2

[0048] Reference Figure 5-6 , which is the second embodiment of the present invention, differs from the first embodiment in that:

[0049] The detection component 3 includes a moving rod 2 31, a fixed block 32 arranged in the middle area of ​​the lower surface of the moving rod 2 31, an air box 33 arranged at the lower end of the fixed block 32 away from the moving rod 2 31, a guide rod 2 arranged on both sides of the side of the air box 33 close to the fixed block 32, a spring 2 arranged on the outside of the guide rod 2, the end of the guide rod 2 away from the air box 33 is inserted into the fixed block 32, one end of the spring 2 is connected to the side of the air box 33 close to the fixed block 32, the end of the spring 2 away from the air box 33 is connected to the fixed block 32, and a heating iron 34 is provided at the end of the air box 33 away from the fixed block 32. A tungsten wire is laid in the heating iron 34. By electrically connecting the tungsten wire to a power source, when current flows through the tungsten wire, electrons move inside it and collide with atoms, causing the atoms inside the tungsten wire to vibrate and generate heat. This part of the heat is conducted to the heating iron 34, which is used for the tungsten wire to convert electrical energy into thermal energy and heat the expansion joint, thereby promoting the deformation of the expansion joint due to thermal expansion and contraction.

[0050] A partition 331 is provided in the middle area of ​​the inner cavity of the air box 33, and the partition 331 divides the inner cavity of the air box 33 into two air cavities. The expansion airbags 35 are provided at both ends of the air box 33, and the expansion airbags 35 are connected to the inside of the air cavity. The movable plates 36 provided on both sides of the expansion airbag 35 are electrically connected to the power supply through the heating iron 34, so that the electrical energy is converted into thermal energy and the heating iron 34 is heated. At this time, the gas in the air cavity inside the air box 33 will expand, and the temperature of the gas inside the air cavity is high by the heating iron 34. The expansion of the gas inside the air cavity due to heat causes the expansion airbag 35 to gradually expand, and the movable plates 36 on both sides of the expansion airbag 35 use the pushing force of the expansion airbag 35 during the expansion process of the expansion airbag 35 to make the two movable plates 36 fit tightly against the side walls of the expansion joint.

[0051] A mounting plate is provided on one end of the two movable plates 36 near the second movable rod 31, and a detector 37 is provided on the mounting plate. The two detectors 37 on adjacent movable plates 36 are symmetrically arranged and electrically connected to the display 11. The detector 37 adopts a fiber grating. Two or more coherent light waves are emitted by the two fiber gratings and meet at certain places in space, so that the light waves emitted by the two fiber gratings are superimposed on each other to form a stable intensity distribution. When the spacing between the two fiber gratings changes, the change in the spacing between the two fiber gratings will cause the interference fringes to move. By measuring the movement of the interference fringes, the movement distance between the two fiber gratings is indirectly measured. Two groups of brackets are provided at both ends of the second movable rod 31, and two guide rods 3 are provided on the brackets. The guide rod 3 passes through the two movable plates 36. A spring 3 is provided on the guide rod 3. The spring 3 is located between the two movable plates 36, and the two ends of the spring 3 are respectively connected to the sides of the two movable plates 36 that are close to each other.

[0052] During use, driven by the switching component 2, when the cleaning component cleans out the stones in the expansion joint, the detection component 3 will also descend synchronously and penetrate into the expansion joint. When the heating iron 34 descends to contact the rubber strip, the heating iron 34 is connected to the power supply, so that the heating iron 34 heats up and heats the inside of the expansion joint.

[0053] As the temperature of the heating iron 34 continues to rise, the volume of the gas inside the air box 33 increases due to the heat, causing the expansion airbag 35 to gradually expand. Then, the movable plates 36 on both sides of the expansion airbag 35 will be pushed by the expansion airbag 35 to fit tightly with the edges of the expansion joint. As a result, when the spacing between the expansion joints changes, the movable plates 36 on both sides of the expansion airbag 35 will also move synchronously under the push of the expansion airbag 35.

[0054] As the heating iron 34 heats the inside of the expansion joint, the rubber strip will be heated and gradually expand, and the gap of the expansion joint will change. At this time, the movable plate 36 will move synchronously, causing the distance between the two detectors 37 to change. The change in the distance between the two detectors 37 will be transmitted to the display 11, and then it is observed whether the expansion joint can expand and contract when heated, thereby ensuring the normal working performance of the expansion joint.

[0055] The remaining structures are the same as those of Example 1.

[0056] Example 3

[0057] Reference Figure 1-10 , which is the third embodiment of the present invention, differs from the second embodiment in that:

[0058] The maintenance component 4 includes a storage tank 41, which is arranged on both sides of the lower surface of the movable rod 31, the storage tank 41 is filled with a rubber protective agent, a plurality of liquid outlets arranged at the end of the storage tank 41 away from the movable rod 31, a guide tube 42 arranged at the end of the storage tank 41 away from the movable rod 31, an elastic tube 43 arranged at the end of the storage tank 41 away from the movable rod 31, the elastic tube 43 is located in the guide tube 42, and the guide tube 43 is arranged at the end of the elastic tube 43 away from the storage tank 41. Part 431 is arranged on the discharge box 44 at the end of the guide tube 42 away from the storage tank 41, and two push blocks 441 are arranged in the discharge box 44. The push blocks 441 have a trapezoidal structure, and the end of the push blocks 441 close to the guide tube 42 is set as an inclined surface. A card slot is provided at the inclined surface of the push blocks 441, and discharge pipes 442 are arranged on both sides of the discharge box 44. The discharge pipes 442 are connected to the inside of the discharge box 44, and the discharge pipes 442 are arranged near the area where the discharge box 44 is connected to the guide tube 42.

[0059] The maintenance component 4 also includes a push rod 45, which passes through the storage tank 41, the guide part 431 and the discharge box 44, an opening and closing plate 451 arranged at one end of the push rod 45, the opening and closing plate 451 is arranged in the storage tank 41, and a retaining ring is arranged in the middle area of ​​the push rod 45, the retaining ring is located between the guide part 431 and the storage tank 41, a spring four is sleeved on the outside of the push rod 45, one end of the spring four is connected to the retaining ring, and the end of the spring four away from the retaining ring is connected to the storage tank 41, a driving block 452 is arranged at the end of the push rod 45 away from the opening and closing plate 451 and the retaining ring, the driving block 452 is located in the discharge box 44, the driving block 452 has a triangular structure, and a card column is provided on both sides of the driving block 452, and the two sides of the driving block 452 are adapted to the inclined surfaces of the push block 441, and the card column is slidably arranged in the card groove.

[0060] The switching assembly 2 includes a guide plate 21 arranged at both ends of a side of the top plate 1 away from the display 11. Two wire grooves 211 are symmetrically provided on the guide plate 21. Two arc grooves 212 are symmetrically provided on the guide plate 21. The two wire grooves 211 are arranged between the two arc grooves 212. The areas of the two arc grooves 212 close to the top plate 1 are far away from each other, and the areas of the arc grooves 212 away from the top plate 1 are close to each other relative to the areas of the arc grooves 212 close to the top plate 1.

[0061] A sliding bar is provided for sliding in the wire groove 211, and a rack is fixedly installed on the side of the sliding bar away from the guide plate 21, and a gear is provided on the side of the two guide plates 21 away from each other and located in the middle area of ​​the guide plate 21, the rack is meshed with the gear, and a driven block 22 is provided at the end of the sliding bar away from the top plate 1, and the driven block 22 is located on the side of the two guide plates 21 close to each other, and a transverse plate 23 is slidingly provided on the driven block 22, and a sliding rod is provided on the side of the transverse plate 23 close to the guide plate 21, and the sliding rod is slidingly provided in the arc groove 212, and the two ends of the moving rod 1 51 are connected to a group of transverse plates 23, and the two ends of the moving rod 2 31 are connected to another group of transverse plates 23. A support is provided on the side of a guide plate 21 close to the gear, and a handle is provided on the support, and the handle is coaxially connected to the gear.

[0062] During use, when the detection component 3 contacts the rubber strip inside the expansion joint, the end of the push rod 45 away from the moving rod 2 31 will also contact the rubber strip. As the moving rod 2 31 descends, the push rod 45 will be limited by the rubber strip and move toward the moving rod 2 31. At this time, the spring 4 will be deformed and compressed, and the push rod 45 will push the opening and closing plate 451 to separate from the bottom surface of the storage tank 41. At this time, the rubber protective agent filled in the storage tank 41 will leak into the discharge box 44 through the liquid outlet and the guide pipe.

[0063] When the detection component 3 gradually leaves the expansion joint, the push rod 45 will be reset under the action of the spring 4, and the opening and closing plate 451 will block the liquid outlet. At the same time, the push rod 45 will drive the driving block 452 to descend during the reset process, so that the driving block 452 pushes the pushing block 441, so that the pushing blocks 441 on both sides of the push rod 45 move away from each other, and then the pushing blocks 441 push the rubber protective agent in the discharge box 44 to a certain liquid level and then discharge it from the discharge pipe 442, so that the rubber protective agent contacts the rubber strip in the expansion joint, and then the rubber strip is protected by the rubber protective agent, thereby improving the performance of the rubber strip.

[0064] By turning the handle clockwise, the handle will drive the gear to rotate, and the gear will drive the racks on both sides to move in opposite directions. At the same time, the wire groove 211 will linearly guide the movement of the racks, and the driven block 22 will also move synchronously with the racks.

[0065] As the rack moves, the slide rod will slide in the arc groove 212, so that the transverse plate 23 slides on the driven block 22 under the guidance of the arc groove 212, and then the cleaning component 5 and the detection component 3 can move in opposite directions as the handle rotates. At the same time, under the guidance of the arc groove 212, the cleaning component 5 and the detection component 3 can avoid each other when approaching each other.

[0066] The remaining structures are the same as those of Example 2.

[0067] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art should be able to understand and implement other variations of the disclosed embodiments based on a study of the drawings, the specification and the claims. In the claims, the term "comprising" does not exclude other devices or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a separate hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A fiber Bragg grating expansion joint testing device for civil engineering, comprising a top plate (1), characterized in that: A display (11) is provided on the upper surface of the top plate (1), a switching component (2) is provided on a side of the top plate (1) away from the display (11), a detection component (3) is provided on the switching component (2), a maintenance component (4) is provided on the detection component (3), and a cleaning component (5) is provided on the switching component (2); The cleaning component (5) includes a moving rod (51), a guide block (52) provided in the middle area of ​​the lower end of the moving rod (51), two guide grooves (521) provided in the guide block (52), a locking rod (53) provided on both sides of the lower surface of the moving rod (51), and two elastic strips (511) provided in the middle area of ​​the lower surface of the moving rod (51), wherein the elastic strip (511) is inserted into the guide groove (521), and the elastic strip (511) is guided by the guide groove (521) so that the elastic strip (511) extends toward the locking rod (53), and the elastic strip (511) is used to extend to the lower end of the stone that has fallen into the expansion joint; The cleaning component (5) further comprises a guide rod (512) provided in the middle area of ​​the lower surface of the moving rod (51), the guide rod (512) being located between the two elastic strips (511), the end of the guide rod (512) away from the moving rod (51) being inserted into the guide block (52), a spring (51) being provided outside the guide rod (512), one end of the spring (51) being connected to the moving rod (51), and the end of the spring (51) away from the moving rod (51) being connected to the end of the guide block (52) close to the moving rod (51); The elastic strip (511) is provided with a plurality of locking holes on one end away from the moving rod (51), the locking rod (53) is provided with a sliding groove (531) on one end away from the moving rod (51), a plug hole (532) is provided on the end of the locking rod (53) away from the moving rod (51), the plug hole (532) passes through the sliding groove (531), a locking tongue (54) is provided in the sliding groove (531), a through hole is provided in the middle area of ​​the locking tongue (54), and a locking column (541) is provided on the wall of the through hole and close to the middle area of ​​the bottom of the sliding groove (531).

2. The fiber Bragg grating expansion joint testing device for civil engineering according to claim 1, characterized in that: The detection component (3) includes a second moving rod (31), a fixed block (32) arranged in the middle area of ​​the lower surface of the second moving rod (31), an air box (33) arranged at the lower end of the fixed block (32) away from the second moving rod (31), a second guide rod arranged on both sides of a side of the air box (33) close to the fixed block (32), a second spring arranged on the outside of the second guide rod, an end of the second guide rod away from the air box (33) is inserted into the fixed block (32), and a heating iron (34) is provided at the end of the air box (33) away from the fixed block (32); a partition (331) provided in the middle region of the inner cavity of the air box (33), the partition (331) dividing the inner cavity of the air box (33) into two air cavities; expansion air bags (35) provided at both ends of the air box (33), the expansion air bags (35) being in communication with the interior of the air cavities; and movable plates (36) provided on both sides of the expansion air bags (35); A mounting plate is provided on one end of the two movable plates (36) close to the second movable rod (31); a detector (37) is provided on the mounting plate; two detectors (37) on adjacent movable plates (36) are symmetrically provided; the two detectors (37) are electrically connected to the display (11); two sets of brackets are provided at both ends of the second movable rod (31); two guide rods (3) are provided on the brackets; the guide rods (3) pass through the two movable plates (36); a spring (3) is provided on the guide rod (3); the spring (3) is located between the two movable plates (36); and both ends of the spring (3) are respectively connected to the sides of the two movable plates (36) close to each other.

3. The fiber Bragg grating expansion joint testing device for civil engineering according to claim 2, characterized in that: The maintenance component (4) includes a storage tank (41), the storage tank (41) is arranged on both sides of the lower surface of the second moving rod (31), the storage tank (41) is filled with a rubber protective agent, a plurality of liquid outlet holes are arranged at one end of the storage tank (41) away from the second moving rod (31), a guide tube (42) is arranged at one end of the storage tank (41) away from the second moving rod (31), and a rubber protective agent is filled in the storage tank (41). (31) an elastic cylinder (43) at one end, the elastic cylinder (43) being located in the guide cylinder (42), a guide portion (431) being provided at the end of the elastic cylinder (43) away from the storage tank (41), a discharge box (44) being provided at the end of the guide cylinder (42) away from the storage tank (41), two push blocks (441) being provided in the discharge box (44), and discharge pipes (442) being provided at both sides of the discharge box (44); The maintenance component (4) further includes a push rod (45), the push rod (45) passing through the storage tank (41), the guide portion (431) and the discharge box (44); an opening and closing plate (451) provided at one end of the push rod (45), the opening and closing plate (451) provided in the storage tank (41); a retaining ring provided in the middle area of ​​the push rod (45), the retaining ring being located between the guide portion (431) and the storage tank (41); and a driving block (452) provided at one end of the push rod (45) away from the opening and closing plate (451) and the retaining ring, the driving block (452) being located in the discharge box (44).

4. The fiber Bragg grating expansion joint testing device for civil engineering according to claim 2, characterized in that: The switching assembly (2) comprises guide plates (21) arranged at both ends of a side of the top plate (1) away from the display (11), two line grooves (211) are symmetrically provided on the guide plate (21), two arc grooves (212) are symmetrically provided on the guide plate (21), the two line grooves (211) are arranged between the two arc grooves (212), the areas of the two arc grooves (212) close to the top plate (1) are away from each other, and the areas of the arc grooves (212) away from the top plate (1) are closer to each other than the areas of the arc grooves (212) close to the top plate (1); The wire groove (211) is provided with a sliding bar, a rack is fixedly installed on the side of the sliding bar away from the guide plate (21), a gear is provided on the side of the two guide plates (21) away from each other and located in the middle area of ​​the guide plate (21), the rack is meshed with the gear, and a driven block (22) is provided on the end of the sliding bar away from the top plate (1), and the driven block (22) is located on the side of the two guide plates (21) close to each other, and the driven block (22) slides up A transverse plate (23) is provided on the transverse plate (23), a sliding rod is provided on the side of the transverse plate (23) close to the guide plate (21), and the sliding rod is slidably provided in the arc groove (212). The two ends of the moving rod (51) are connected to a group of transverse plates (23), and the two ends of the moving rod (31) are connected to another group of transverse plates (23). A support is provided on a side of the guide plate (21) close to the gear, and a handle is provided on the support, and the handle is coaxially connected to the gear.

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