Tunnel reticulated shell indoor model test device

Abstract

The invention provides a tunnel reticulated shell indoor model test device, and belongs to the technical field of tunnel reticulated shell tests. The tunnel reticulated shell indoor model test device comprises a reticulated shell model and two bottom plates, two electric sliding rails are installed between the two bottom plates, a deformation test analysis mechanism is arranged on the electric sliding rails, the deformation test analysis mechanism comprises two sliding tables and a connecting block, the two sliding tables are connected with the connecting block, and the connecting block is connected with the two sliding tables. The two sliding tables are installed on the two electric sliding rails correspondingly, and a limiting rod is fixedly installed between the two sliding tables. By arranging the deformation test analysis mechanism, the sensor can judge and record deformation of the inner wall area of the reticulated shell model between the two sliding rods through movement of the two sliding rods, and the stress state of the input end of the sensor can be increased or decreased through different movement directions of the sliding rods; and further judging whether the deformation of the inner wall area of the reticulated shell model is in an inward concave state or an outward convex state.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel lattice shell testing, in particular to a tunnel lattice shell indoor model testing device. Background Art

[0002] Tunnel lattice shell testing refers to the mechanical performance testing and engineering verification activities carried out on a new type of tunnel support structure. This technology improves the integrity and bearing capacity of the support system by introducing a reinforced welded lattice shell structure into traditional bolt-and-spray support. It is particularly suitable for complex geological conditions such as soft rock, high stress or cross-mining tunnels.

[0003] In the existing technology, when conducting stress simulation experiments on tunnel grid shells, the degree of deformation after being subjected to stress is the main test purpose. However, the detection of its deformation degree in the existing technology usually relies on multiple sensors to perform multi-point detection, which is very costly and still has detection dead spots. Summary of the Invention

[0004] In order to make up for the above deficiencies, the present invention provides a tunnel lattice shell indoor model test device that overcomes the above technical problems or at least partially solves the above problems.

[0005] The present invention is achieved in that: The present invention provides a tunnel lattice shell indoor model test device, comprising a lattice shell model and two bottom plates, two electric slide rails are installed between the two bottom plates, and a deformation test analysis mechanism is provided on the electric slide rails. The deformation test analysis mechanism comprises: There are two slides, each of which is mounted on two electric slide rails. A limit rod is fixedly installed between the two slides, and a screw rod is rotatably installed between the two slides. A connecting block is sleeved between the screw rod and the limit rod, the connecting block and the screw rod are threadedly connected, the connecting block and the limit rod are slidably connected, a carrying box is fixedly installed on the top of the connecting block, two slides are provided on the top of the carrying box, and a accommodating tube is vertically fixed on the top of the two slides, a sliding rod is slidably installed inside the accommodating tube, and a ball bearing is installed on the top of the sliding rod.

[0006] In a preferred solution, a movable groove is provided on the top of the carrier box, the movable groove is communicated with the inner cavity of the carrier box, the internal sliding sleeve of the movable groove is provided with two movable blocks, the tops of the two movable blocks are respectively fixedly connected to the bottoms of the two slides, and a limiting slide rail is installed on the inner top wall of the carrier box, and the two movable blocks are both slidably sleeved inside the limiting slide rail.

[0007] In a preferred solution, a sensor is installed inside the slide, and a limit strip is integrally formed inside the accommodating cylinder. The surface sliding sleeve of the limit strip is provided with a first driving bolt and a second driving bolt. A first spring is installed between the first driving bolt and the second driving bolt. The top of the first driving bolt is fixedly connected to the bottom of the sliding rod. A first motor is installed on one of the slides, and the output end of the first motor is connected to the screw rod.

[0008] In a preferred embodiment, an alternating drive mechanism is provided inside the carrying box, and the alternating drive mechanism includes two rotating rods, which are rotatably mounted on the inner bottom wall of the carrying box. A first connecting rod is fixedly sleeved on the surface of the rotating rod, and a second connecting rod is rotatably mounted on the top of the first connecting rod. The top of the other end of the second connecting rod is rotatably connected to the moving block.

[0009] In a preferred solution, four first fixed blocks are fixedly installed on the inner bottom wall of the carrying box, and the four first fixed blocks are distributed in pairs with the central axis of the carrying box as the axis. A slide is slidably sleeved between every two of the first fixed blocks, and the shape of the slide is set to be a mountain shape. Two second fixed blocks are fixedly sleeved on the surface of the slide, and a second spring is installed between the first fixed block and the second fixed block.

[0010] In a preferred solution, a gear is fixed on the surface of the rotating rod, a tooth groove is opened on the slide, the slide is engaged with the gear through the tooth groove, a second motor is installed at the bottom of the connecting block, an eccentric wheel is installed at the output end of the second motor, and the eccentric wheel is located between the two slides.

[0011] In a preferred embodiment, a marking mechanism is provided on the top of the skateboard, and the marking mechanism includes a first mounting bracket and a second mounting bracket, the first mounting bracket and the second mounting bracket are fixedly mounted on the top of the skateboard, the first mounting bracket and the second mounting bracket are fixedly mounted on the top of the first mounting bracket and the second mounting bracket, and the first output nozzle and the second output nozzle are respectively installed on the top of the first piston cylinder and the second piston cylinder.

[0012] In a preferred embodiment, a first piston bolt is slidably installed inside the first piston cylinder, a third spring is installed between the first piston bolt and the inner bottom wall of the first piston cylinder, a first driving rod is fixedly installed on the surface of the sliding rod, and a first driving plate is fixedly installed on the top of the first driving rod, and the first driving plate is located below the first piston bolt.

[0013] In a preferred solution, a third piston cylinder is fixedly installed on the top of the slide, a third piston bolt is slidably installed inside the third piston cylinder, a fourth spring is installed between the third piston bolt and the inner top wall of the third piston cylinder, a second driving rod is fixedly installed on the surface of the sliding rod, a second driving plate is fixedly installed on the bottom of the second driving rod, the second driving plate is located above the third piston bolt, and a connecting pipe is installed between the second piston cylinder and the third piston cylinder.

[0014] In a preferred solution, a plurality of supplementary cylinders are fixedly mounted inside the first mounting frame and the second mounting frame, and supplementary tubes are installed between the supplementary cylinders and the first piston cylinder and the third piston cylinder.

[0015] The present invention provides a tunnel lattice shell indoor model test device, which has the following beneficial effects: 1. By setting up a deformation test analysis mechanism, the movement of the two sliding rods allows the sensor to determine and record the deformation of the inner wall area of ​​the lattice shell model between the two sliding rods. The different movement directions of the sliding rods can increase or decrease the force state of the input end of the sensor, and further determine whether the deformation of the inner wall area of ​​the lattice shell model is concave or convex. Compared with the existing technology, there is no need to spend a lot of money to deploy multiple sensors. When the deformation of the area between the two sliding rods is sensed, the deformation of the area between the two sliding rods can be further detected and recorded in detail.

[0016] 2. By setting up an alternating drive mechanism, one of the rotating rods is rotated, so that one of the slides drives the slide rod to move. During this process, the sensor inside it records the deformation state. After completion, it returns to its original position, and the other rotating rod is rotated, so that the sensor inside the other slide again records the degree of deformation here, thereby improving the accuracy of deformation detection. Compared with the existing technology, the recorded deformation state is more detailed, and the data error is reduced by cross-comparison of the records of the two sensors.

[0017] 3. By setting up a marking mechanism, when the inner wall of the lattice shell model is more concave, the pigment inside the first piston cylinder is sprayed onto the deformed area through the first output nozzle. When the inner wall of the lattice shell model is more convex, the pigment inside the second piston cylinder is sprayed onto the deformed area through the second output nozzle. This allows the user to quickly know the distribution of the areas where the lattice shell model is more severely deformed after being subjected to force at the detection site. Moreover, the use of two different colors of pigments allows the user to accurately distinguish whether the area with more severe deformation is concave or convex. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure provided by an embodiment of the present invention; Figure 2 A schematic diagram of the overall structure of the embodiment of the present invention is provided from a bottom view; Figure 3 A schematic structural diagram of an electric slide rail is provided for an embodiment of the present invention; Figure 4 A schematic diagram of a carrier box structure from a top view is provided for an embodiment of the present invention; Figure 5 A partial cross-sectional view of a carrier box is provided for an embodiment of the present invention; Figure 6 A schematic structural diagram of an alternating drive mechanism is provided for an embodiment of the present invention; Figure 7 An exploded view of a first connecting rod and a rotating rod is provided for an embodiment of the present invention; Figure 8 A partial cross-sectional view of a receiving tube is provided for an embodiment of the present invention; Figure 9 A partial cross-sectional view of a slide plate is provided for an embodiment of the present invention.

[0020] In the figure: 1, lattice shell model; 2, bottom plate; 3, electric slide rail; 401, slide; 402, limit rod; 403, screw rod; 404, connecting block; 405, carrying box; 406, slide plate; 407, accommodating cylinder; 408, slide rod; 409, ball bearing; 410, moving groove; 411, moving block; 412, limit slide rail; 413, sensor; 414, limit bar; 415, first driving bolt; 416, second driving bolt; 417, first spring; 418, first motor; 501, rotating rod; 502, first connecting rod; 503, second connecting rod; 504, first fixing block; 505, slide; 506, second Fixed block; 507, second spring; 508, gear; 509, tooth groove; 510, second motor; 511, eccentric wheel; 601, first mounting bracket; 602, second mounting bracket; 603, first piston cylinder; 604, second piston cylinder; 605, first output nozzle; 606, second output nozzle; 607, first piston bolt; 608, third spring; 609, first drive rod; 610, first drive plate; 611, third piston cylinder; 612, third piston bolt; 613, fourth spring; 614, second drive rod; 615, second drive plate; 616, connecting pipe; 617, replenishing cylinder; 618, replenishing pipe. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 making creative efforts shall fall within the scope of protection of the present invention.

[0022] Reference Figures 1-9The present invention provides a technical solution: a tunnel grid shell indoor model test device, comprising a grid shell model 1 and two bottom plates 2, two electric slide rails 3 are installed between the two bottom plates 2 by bolts, the shape of the electric slide rail 3 is consistent with that of the grid shell model 1, but the overall size is reduced at the same proportion, a deformation test analysis mechanism is provided on the electric slide rail 3, the deformation test analysis mechanism comprises a slide 401 and a connecting block 404, two slides 401 are provided, the two slides 401 are respectively installed on the two electric slide rails 3, a limit rod 402 is fixedly installed between the two slides 401, a screw rod 403 is rotatably installed between the two slides 401, and the screw rod 403 is rotatably installed between the two slides 401. The rod 403 and the limiting rod 402 are arranged in parallel in the axial direction, the connecting block 404 is sleeved between the screw rod 403 and the limiting rod 402, the connecting block 404 and the screw rod 403 are threadedly connected, the connecting block 404 and the limiting rod 402 are slidably connected, a carrying box 405 is fixedly installed on the top of the connecting block 404, two slides 406 are provided on the top of the carrying box 405, and a receiving tube 407 is vertically fixed on the top of the two slides 406. A sliding rod 408 is slidably installed inside the receiving tube 407, and a ball 409 is installed on the top of the sliding rod 408 to reduce the friction between the inner wall of the lattice shell model 1. By setting a deformation test analysis mechanism,The user simulates the stress conditions of the lattice shell model 1 in the soil by setting hydraulic jacks at multiple points. After the simulation is completed, the electric slide rail 3 is started to move the slide 401 along the electric slide rail 3, and the ball bearing 409 is driven to move. After the slide 401 moves from one side to the other on the electric slide rail 3, the screw rod 403 is rotated to make the two slide rods 408 move simultaneously along the axial direction of the lattice shell model 1, and the electric slide rail 3 is started again. In this way, the inner wall of the lattice shell model 1 is fully covered. During this process, the ball bearing 409 contacts the inner wall of the lattice shell model 1, and the ball bearing 409 keeps the inner wall of the lattice shell model 1 in a state of continuous squeezing, that is, the first spring 417 is in a partially compressed state in the initial state. When the inner wall of the lattice shell model 1 undergoes a concave deformation, the elastic force of the first spring 417 is released, causing the slide rod 408 to move toward the direction close to the inner wall of the lattice shell model 1. When the inner wall of the lattice shell model 1 undergoes a convex deformation, the first spring 417 is further compressed. The compression is performed, and the slide bar 408 moves in a direction away from the inner wall of the lattice shell model 1. Thus, the movement of the two slide bars 408 enables the sensor 413 to determine and record the deformation of the inner wall area of ​​the lattice shell model 1 between the two slide bars 408. The different movement directions of the slide bars 408 can increase or decrease the force state of the input end of the sensor 413, and further determine whether the deformation of the inner wall area of ​​the lattice shell model 1 is in a concave state or a convex state. After the sensor 413 determines and records the deformation between the two slide bars 408, the slide plate 406 is moved again, so that the slide plate 406 drives the slide bar 408 and the ball 409 to move along the axial direction of the lattice shell model 1, thereby further sensing and recording the deformation area between the two slide bars 408. Compared with the prior art, it is not necessary to spend a lot of money to deploy multiple sensors 413, and when the deformation of the area between the two slide bars 408 is sensed, the deformation of the area between the two slide bars 408 can be further detected and recorded in detail. Reference Figures 1-9 , a moving groove 410 is provided on the top of the carrying box 405, and the moving groove 410 is communicated with the inner cavity of the carrying box 405, and the internal sliding sleeve of the moving groove 410 is provided with two moving blocks 411, and the tops of the two moving blocks 411 are fixedly connected to the bottoms of the two slides 406 respectively. A limiting slide rail 412 is installed on the inner top wall of the carrying box 405, and the two moving blocks 411 are both slidably sleeved inside the limiting slide rail 412. Under the limiting cooperation of the limiting slide rail 412, the moving block 411 can only move axially in the front and rear directions. By setting the moving groove 410 and the moving block 411, since the moving block 411 is restricted by the limiting slide rail 412, the slide 406 and the slide rod 408 can only move along the direction of the limiting slide rail 412, that is, they can only move along the axial direction of the lattice shell model 1; Reference Figures 1-9A sensor 413 is installed inside the slide 406. The input end of the sensor 413 passes through the inner cavity of the accommodating tube 407. A limit strip 414 is integrally formed inside the accommodating tube 407. A first driving bolt 415 and a second driving bolt 416 are slidingly sleeved on the surface of the limit strip 414. A first spring 417 is installed between the first driving bolt 415 and the second driving bolt 416. The top of the first driving bolt 415 is fixedly connected to the bottom of the slide bar 408, and the bottom of the second driving bolt 416 is in contact with the input end of the sensor 413. A first motor 418 is installed on one of the slides 401. The output end of the first motor 418 is connected to the screw rod 403. By setting a sensor 413, the user starts the first motor 418, thereby driving the screw rod 403 to rotate. Under the limited cooperation of the limit rod 402, the connecting block 404 drives the carrying box 405 to move. The arrangement of the first drive bolt 415 and the second drive bolt 416 ensures that the sensor 413 always maintains a force state, and can judge and record the deformation state of the lattice shell model 1 by increasing or decreasing the force. Reference Figures 1-9 The interior of the carrier box 405 is provided with an alternating drive mechanism, which includes two rotating rods 501. The two rotating rods 501 are symmetrically mounted on the inner bottom wall of the carrier box 405 with the central axis of the carrier box 405 as the axis. A first connecting rod 502 is fixedly sleeved on the surface of the rotating rod 501, and a second connecting rod 503 is rotatably mounted on the top of the first connecting rod 502. The rotating rod 501 and the second connecting rod 503 are respectively located at the two ends of the first connecting rod 502. The top of the other end of the second connecting rod 503 is rotatably connected to the moving block 411. By setting up the alternating drive mechanism, when the sensor 413 senses that the area between the two sliding rods 408 is in a deformed state, one of the sliding rods 408 is rotated. The first connecting rod 502 and the second connecting rod 503 rotate, thereby driving one of the moving blocks 411 to move along the limiting slide rail 412, so that one of the slides 406 drives the slide bar 408 to move. During this process, the sensor 413 inside it records the deformation state. After completion, it returns to its original position, and the other rotating rod 501 is rotated, so that the sensor 413 inside the other slide 406 again records the degree of deformation at this location, thereby improving the accuracy of deformation detection. Compared with the existing technology, the recorded deformation state is more detailed, and the data error is reduced by cross-comparison of the records of the two sensors 413. Reference Figures 1-9, four first fixed blocks 504 are fixedly installed on the inner bottom wall of the carrying box 405, and the four first fixed blocks 504 are distributed in pairs with the central axis of the carrying box 405 as the axis. A slide 505 is slidably sleeved between every two first fixed blocks 504, and the shape of the slide 505 is set to be mountain-shaped. Two second fixed blocks 506 are fixedly sleeved on the surface of the slide 505, and a second spring 507 is installed between the first fixed block 504 and the second fixed block 506. A gear 508 is fixedly sleeved on the surface of the rotating rod 501, and a tooth groove 509 is opened on the slide 505. The slide 505 is meshed with the gear 508 through the tooth groove 509. A second motor 510 is installed at the bottom of the connecting block 404, and an eccentric wheel 511 is installed at the output end of the second motor 510. The eccentric wheel 511 is located between the two slides 505. When the eccentric wheel 511 rotates, the eccentric wheel 51 The raised portion of 1 alternately squeezes the two slides 505, causing the two slides 505 to move alternately in opposite directions. By arranging the slide 505 and the gear 508, when the area between the two slide bars 408 is in a deformed state, the second motor 510 is started to drive the eccentric wheel 511 to rotate. The raised portion of the eccentric wheel 511 squeezes one of the slides 505. Under the limited cooperation of the first fixed block 504, the slide 505 is moved, and the gear 508 on that side is driven to rotate through the tooth groove 509, thereby driving the rotating rod 501 to rotate. When the raised portion of the eccentric wheel 511 and the slide 505 on that side are misaligned, the slide 505 returns to its original position due to the rebound force of the second spring 507, and the eccentric wheel 511 continues to rotate to squeeze the slide 505 on the other side, thereby causing the slides 406 on both sides to move alternately. Reference Figures 1-9, a marking mechanism is provided on the top of the slide 406, and the marking mechanism includes a first mounting bracket 601 and a second mounting bracket 602, and the first mounting bracket 601 and the second mounting bracket 602 are fixedly installed on the top of the slide 406 by bolts, and the first piston cylinder 603 and the second piston cylinder 604 are fixedly installed on the top of the first mounting bracket 601 and the second mounting bracket 602 respectively, and the first output nozzle 605 and the second output nozzle 606 are installed on the top of the first piston cylinder 603 and the second piston cylinder 604 respectively. The surfaces of the first output nozzle 605 and the second output nozzle 606 are both installed with a first one-way valve. By setting the marking mechanism, when the area between the two slide bars 408 is deformed, and the two slide bars 408 move alternately for further recording, the contact between the ball 409 and the deformed area causes The slide rod 408 moves toward the side close to the inner wall of the lattice shell model 1 or away from the inner wall of the lattice shell model 1. During this process, when the inner wall of the lattice shell model 1 is more concave, the slide rod 408 moves upward to a certain distance, so that the paint inside the first piston cylinder 603 is sprayed onto the deformed area through the first output nozzle 605. When the inner wall of the lattice shell model 1 is more convex, the slide rod 408 moves downward to a certain distance, so that the paint inside the second piston cylinder 604 is sprayed onto the deformed area through the second output nozzle 606. This allows the user to quickly know the distribution of the areas where the lattice shell model 1 is more severely deformed after being subjected to force at the detection site, and the use of two different colors of paint allows the user to accurately distinguish whether the area with more severe deformation is concave deformation or convex deformation. Reference Figures 1-9 , a first piston bolt 607 is slidably installed inside the first piston cylinder 603, and a third spring 608 is installed between the first piston bolt 607 and the inner bottom wall of the first piston cylinder 603. A first driving rod 609 is fixedly installed on the surface of the sliding rod 408, and a first driving plate 610 is fixedly installed on the top of the first driving rod 609. The first driving plate 610 is located below the first piston bolt 607, and the first driving plate 610 and the first piston bolt 607 are spaced apart. By arranging the first piston cylinder 603, when the sliding rod 408 moves in the concave area, the sliding rod 408 moves upward to drive the first driving rod 609 and the first driving plate 610 to move upward. When the degree of concavity is more serious, the sliding rod 408 drives the first driving plate 610 to rise a certain distance and then squeeze the first piston bolt 607, so that the paint inside the first piston cylinder 603 is sprayed onto the inner wall of the lattice shell model 1. When the sliding rod 408 returns to its original position, the first piston bolt 607 returns to its original position due to the rebound force of the third spring 608. Reference Figures 1-9, a third piston cylinder 611 is fixedly installed on the top of the slide plate 406, a third piston bolt 612 is slidably installed inside the third piston cylinder 611, a fourth spring 613 is installed between the third piston bolt 612 and the inner top wall of the third piston cylinder 611, a second driving rod 614 is fixedly installed on the surface of the slide rod 408, a second driving plate 615 is fixedly installed on the bottom of the second driving rod 614, the second driving plate 615 is located above the third piston bolt 612, and the second driving plate 615 and the third piston bolt 612 are spaced apart, a connecting pipe 616 is installed between the second piston cylinder 604 and the third piston cylinder 611, and the connection between the connecting pipe 616 and the third piston cylinder 611 is located below the third piston bolt 612. By setting the third piston cylinder 611, when the slide rod 408 moves in the convex area, the slide rod 408 moves downward, driving the second drive rod 614 and the second drive plate 615 to move downward. When the convexity is more serious, the slide rod 408 drives the second drive plate 615 to move down a certain distance and squeezes the third piston bolt 612, so that the paint inside the third piston cylinder 611 enters the interior of the second piston cylinder 604 through the connecting pipe 616. Since the interior of the second piston cylinder 604 is already full of paint in the initial state, the transfer of paint inside the third piston cylinder 611 at this time causes the paint inside the second piston cylinder 604 to be sprayed onto the inner wall of the lattice shell model 1. When the slide rod 408 returns to its original position, the third piston bolt 612 returns to its original position due to the rebound force of the fourth spring 613; Reference Figures 1-9, several replenishing cylinders 617 are fixedly installed inside the first mounting frame 601 and the second mounting frame 602, and a feeding port is installed on the top of the replenishing cylinder 617 for replenishing the pigment inside the replenishing cylinder 617. The replenishing cylinder 617 inside the first mounting frame 601 and the replenishing cylinder 617 inside the second mounting frame 602 each contain pigments of different colors, and the pigment inside the first piston cylinder 603 is consistent with the pigment inside the replenishing cylinder 617 inside the first mounting frame 601, and the pigment inside the second piston cylinder 604 and the third piston cylinder 611 is consistent with the pigment inside the replenishing cylinder 617 inside the second mounting frame 602. A replenishing tube 618 is installed between the replenishing cylinder 617 and the first piston cylinder 603 and the third piston cylinder 611, and a driving spring and The extrusion plate always squeezes the internal pigment through the elastic force of the driving spring. A second one-way valve is installed on the replenishing tube 618. The valve disc of the second one-way valve is in opposite directions to the valve disc of the first one-way valve. The connection between the first piston cylinder 603 and the replenishing tube 618 is located above the first piston bolt 607, and the connection between the third piston cylinder 611 and the replenishing tube 618 is located below the third piston bolt 612. By setting the replenishing cylinder 617, when the first piston bolt 607 and the third piston bolt 612 return to their original positions, the pigment inside the replenishing cylinder 617 on the first mounting frame 601 and the pigment inside the replenishing cylinder 617 on the second mounting frame 602 enter the first piston cylinder 603 and the third piston cylinder 611 respectively through the principle of negative pressure to replenish their internal pigments.

[0023] Specifically, the working process or working principle of the tunnel grid shell indoor model test device is as follows: when in use, the user sets hydraulic jacks at multiple points to simulate the stress conditions of the grid shell model 1 in the soil. After the simulation is completed, the electric slide rail 3 is started to make the slide 401 move along the electric slide rail 3, and at the same time drive the ball 409 to roll and move. After the slide 401 moves from one side to the other side on the electric slide rail 3, the user starts the first motor 418, thereby driving the screw rod 403 to rotate, and under the limited cooperation of the limit rod 402, the connecting block 404 drives the carrying box 405 to move, and the electric slide rail 3 is started again. The inner wall of the grid shell model 1 is repeatedly tested for full coverage. During this process, the ball 409 and the grid shell are rotated. The inner wall of the lattice shell model 1 is in contact with the ball 409, and the ball 409 keeps the inner wall of the lattice shell model 1 in a state of continuous squeezing it, that is, the first spring 417 is in a partially compressed state in the initial state. When the inner wall of the lattice shell model 1 is concavely deformed, the elastic force of the first spring 417 is released, causing the slide bar 408 to move toward the direction close to the inner wall of the lattice shell model 1. When the inner wall of the lattice shell model 1 is convexly deformed, the first spring 417 is further compressed, and the slide bar 408 moves away from the inner wall of the lattice shell model 1. Therefore, the movement of the two slide bars 408 allows the sensor 413 to determine and record the deformation of the inner wall area of ​​the lattice shell model 1 between the two slide bars 408, and the different movement directions of the slide bars 408 can make the sensor The force state of the input end of the sensor 413 is increased or decreased, and the deformation of the inner wall area of ​​the lattice shell model 1 is further judged to be a concave state or a convex state. When the sensor 413 judges and records the deformation between the two slide bars 408, the second motor 510 is started to drive the eccentric wheel 511 to rotate. The raised portion of the eccentric wheel 511 squeezes one of the slides 505. Under the limit cooperation of the first fixed block 504, the slide 505 moves, and the gear 508 on this side is driven to rotate through the tooth groove 509, thereby driving the rotating rod 501 to rotate, so that the first connecting rod 502 and the second connecting rod 503 are rotated, thereby driving one of the moving blocks 411 to move along the limit slide rail 412, so that one of The slide 406 drives the slide bar 408 to move, and during this process, the sensor 413 inside it records the deformation state. When the protrusion of the eccentric wheel 511 and the slide 505 on this side are misaligned, the slide 505 is returned to its original position by the rebound force of the second spring 507, and the eccentric wheel 511 continues to rotate to squeeze the slide 505 on the other side, so that the sensor 413 inside the other slide bar 406 records the degree of deformation here again. When the two slide bars 408 move alternately for further recording, the contact between the ball 409 and the deformed area causes the slide bar 408 to move toward the side close to the inner wall of the lattice shell model 1 or away from the inner wall of the lattice shell model 1. In this process, when the inner wall of the lattice shell model 1 is concave to a large extent,The slide rod 408 drives the first driving plate 610 to rise a certain distance and squeezes the first piston bolt 607, so that the paint inside the first piston cylinder 603 is sprayed onto the deformation area through the first output nozzle 605. When the slide rod 408 returns to its original position, the first piston bolt 607 returns to its original position by the rebound force of the third spring 608. Through the negative pressure principle, the paint inside the replenishing cylinder 617 on the first mounting frame 601 replenishes the first piston cylinder 603. When the inner wall of the lattice shell model 1 is more convex, the slide rod 408 drives the second driving plate 615 to descend a certain distance. After a certain distance, the third piston bolt 612 is squeezed, allowing the pigment inside the third piston cylinder 611 to enter the second piston cylinder 604 through the connecting tube 616. Since the second piston cylinder 604 is already full of pigment in its initial state, the pigment inside the second piston cylinder 604 is sprayed onto the deformed area through the second discharge nozzle 606. When the slide rod 408 returns to its original position, the rebound force of the fourth spring 613 causes the third piston bolt 612 to return to its original position, and the pigment inside the replenishing cylinder 617 on the second mounting frame 602 replenishes the third piston cylinder 611.

Claims

1. A tunnel lattice shell indoor model test device, comprising a lattice shell model (1) and two bottom plates (2), wherein two electric slide rails (3) are installed between the two bottom plates (2), characterized in that: The electric slide rail (3) is provided with a deformation test analysis mechanism, and the deformation test analysis mechanism comprises: A slide (401), wherein two slides (401) are provided, and the two slides (401) are respectively mounted on two electric slide rails (3), a limit rod (402) is fixedly mounted between the two slides (401), and a screw rod (403) is rotatably mounted between the two slides (401); A connecting block (404) is sleeved between the screw rod (403) and the limiting rod (402), the connecting block (404) and the screw rod (403) are threadedly connected, the connecting block (404) and the limiting rod (402) are slidably connected, a carrying box (405) is fixedly installed on the top of the connecting block (404), two slides (406) are provided on the top of the carrying box (405), and a receiving tube (407) is vertically fixed on the top of the two slides (406), a sliding rod (408) is slidably installed inside the receiving tube (407), and a ball (409) is installed on the top of the sliding rod (408).

2. The indoor model test device for a tunnel lattice shell according to claim 1, characterized in that: A movable groove (410) is provided on the top of the carrier box (405), and the movable groove (410) is communicated with the inner cavity of the carrier box (405). Two movable blocks (411) are slidably sleeved inside the movable groove (410), and the tops of the two movable blocks (411) are fixedly connected to the bottoms of the two slides (406) respectively. A limiting slide rail (412) is installed on the inner top wall of the carrier box (405), and the two movable blocks (411) are slidably sleeved inside the limiting slide rail (412).

3. The indoor model test device for a tunnel lattice shell according to claim 2, characterized in that: A sensor (413) is installed inside the slide plate (406), and a limit strip (414) is integrally formed inside the accommodating cylinder (407). A first driving bolt (415) and a second driving bolt (416) are provided on the surface sliding sleeve of the limit strip (414). A first spring (417) is installed between the first driving bolt (415) and the second driving bolt (416). The top of the first driving bolt (415) is fixedly connected to the bottom of the slide bar (408). A first motor (418) is installed on one of the slides (401), and the output end of the first motor (418) is connected to the screw rod (403).

4. The indoor model test device for a tunnel lattice shell according to claim 3, characterized in that: An alternating drive mechanism is provided inside the carrying box (405), and the alternating drive mechanism comprises two rotating rods (501), the two rotating rods (501) are rotatably mounted on the inner bottom wall of the carrying box (405), a first connecting rod (502) is fixedly sleeved on the surface of the rotating rod (501), a second connecting rod (503) is rotatably mounted on the top of the first connecting rod (502), and the top of the other end of the second connecting rod (503) is rotatably connected to the moving block (411).

5. The indoor model test device for a tunnel lattice shell according to claim 4, characterized in that: Four first fixing blocks (504) are fixedly installed on the inner bottom wall of the carrying box (405), and the four first fixing blocks (504) are distributed in pairs with the central axis of the carrying box (405) as the axis. A slide (505) is slidably sleeved between every two of the first fixing blocks (504), and the shape of the slide (505) is set to be a mountain shape. Two second fixing blocks (506) are fixedly sleeved on the surface of the slide (505), and a second spring (507) is installed between the first fixing block (504) and the second fixing block (506).

6. The indoor model test device for a tunnel lattice shell according to claim 5, characterized in that: A gear (508) is fixedly mounted on the surface of the rotating rod (501), a tooth groove (509) is provided on the slide (505), and the slide (505) is meshed with the gear (508) via the tooth groove (509). A second motor (510) is mounted on the bottom of the connecting block (404), and an eccentric wheel (511) is mounted on the output end of the second motor (510), and the eccentric wheel (511) is located between the two slides (505).

7. The indoor model test device for a tunnel lattice shell according to claim 6, characterized in that: A marking mechanism is provided on the top of the slide plate (406), and the marking mechanism includes a first mounting frame (601) and a second mounting frame (602). The first mounting frame (601) and the second mounting frame (602) are fixedly mounted on the top of the slide plate (406). A first piston cylinder (603) and a second piston cylinder (604) are fixedly mounted on the top of the first mounting frame (601) and the second mounting frame (602), respectively. A first output nozzle (605) and a second output nozzle (606) are installed on the top of the first piston cylinder (603) and the second piston cylinder (604), respectively.

8. The indoor model test device for a tunnel lattice shell according to claim 7, characterized in that: A first piston bolt (607) is slidably mounted inside the first piston cylinder (603), a third spring (608) is mounted between the first piston bolt (607) and the inner bottom wall of the first piston cylinder (603), a first driving rod (609) is fixedly mounted on the surface of the sliding rod (408), a first driving plate (610) is fixedly mounted on the top of the first driving rod (609), and the first driving plate (610) is located below the first piston bolt (607).

9. The indoor model test device for a tunnel lattice shell according to claim 8, characterized in that: A third piston cylinder (611) is fixedly mounted on the top of the slide plate (406), a third piston bolt (612) is slidably mounted inside the third piston cylinder (611), a fourth spring (613) is mounted between the third piston bolt (612) and the inner top wall of the third piston cylinder (611), a second driving rod (614) is fixedly mounted on the surface of the slide rod (408), a second driving plate (615) is fixedly mounted on the bottom of the second driving rod (614), the second driving plate (615) is located above the third piston bolt (612), and a connecting pipe (616) is mounted between the second piston cylinder (604) and the third piston cylinder (611).

10. The indoor model test device for a tunnel lattice shell according to claim 9, characterized in that: Several supplementary cylinders (617) are fixedly installed inside the first mounting frame (601) and the second mounting frame (602), and supplementary tubes (618) are installed between the supplementary cylinders (617) and the first piston cylinder (603) and the third piston cylinder (611).

Images