Turnover device of shield tunnel segment loading support and test equipment with turnover device

Abstract

The invention relates to the technical field of duct piece loading tests, in particular to a turnover device of a shield tunnel duct piece loading support and test equipment with the turnover device. A lifting unit; an overturning unit; the magnetic attraction unit is provided with a lower point contact button and is used for magnetically attracting the upper box body and the elastic clamping unit; after the lifting unit descends for an odd number of times to press the lower point contact button, the magnetic attraction unit is powered off, and the elastic clamping unit restores to a natural state and is clamped and matched with the lifting unit, so that disassembly and hoisting of the upper box body are completed at the same time; after the lifting unit descends for even times and presses the lower point contact button, the magnetic attraction unit is powered on, the magnetic attraction unit attracts the elastic clamping unit through magnetic force, the elastic clamping unit is separated from the lifting unit, and therefore lifting releasing and inverted installation of the upper box body are completed at the same time. According to the invention, the loading test efficiency of the duct piece can be improved.

Description

Technical Field

[0001] This application relates to the technical field of segment loading tests, and in particular to a flipping device for a segment loading support in a shield tunnel and testing equipment having the same. Background Technology

[0002] In recent years, shield tunneling technology has been widely used in subway tunnel engineering in China. Shield segments are the main assembly components in shield tunneling, bearing the responsibility of resisting soil pressure, groundwater pressure, and other special loads. The quality of shield segments and their mechanical properties under load are related to the overall quality and safety of the tunnel. Specifically, under the influence of their large self-weight and complex underground load conditions, shield segments are prone to cracking, damage, and excessive deformation, which will reduce their durability and load-bearing capacity, thus affecting the operational life and structural reliability of the subway tunnel. Therefore, conducting experimental verification of the mechanical properties of shield tunnel lining segments using reasonable test settings is of great significance for ensuring the safety of shield tunnel engineering.

[0003] A search revealed Chinese Patent Publication No. CN117949196A, which discloses a test device for multi-dimensional loading and installation of shield tunnel lining segments. This test device includes a side wing support structure, a lower pressure structure, and a lower support component. The side wing structure also includes a base plate and an axial pressure measuring sensor. A limiting device is also provided on one side of the lower housing of the support to drive the lower housing to move left and right. The lower pressure structure includes a secondary distribution beam, a secondary reinforcing beam, a secondary beam extension frame, and a main distribution beam. When a negative bending moment is applied, the negative bending moment loading transport vehicle support is located above the bracket. When a horizontal force is applied, the axial pressure measuring sensor is located inside the upper housing of the support. A spoke-type sensor is installed on one side of the horizontal force loading hydraulic cylinder. This invention has a reasonable structural design and can simultaneously realize a dual-purpose loading device for shield tunnel segments under both positive and negative bending moments. It can also achieve composite loading of bending moment and axial pressure on the shield tunnel segments, making it more practical.

[0004] The aforementioned technologies have the following drawbacks: When converting the segment test from a positive bending moment test to a negative bending moment test, workers need to first disassemble the upper support box from the lower support box, then hoist the upper support box to a specified height and rotate it 180°, then lower the upper support box back to its original position and release the hoisting, and finally invert the upper support box onto the lower support box. That is, the upper support box needs to undergo multiple steps in sequence: disassembly, hoisting, lifting, rotation, lowering back to its original position, releasing the hoisting, and inverting installation. The above operation steps are cumbersome and seriously affect the efficiency of the segment loading test, so improvements are needed. Summary of the Invention

[0005] To improve the efficiency of segment loading tests, this application provides a flipping device for shield tunnel segment loading supports and testing equipment having the same.

[0006] Firstly, the overturning device for the shield tunnel segment loading support provided in this application adopts the following technical solution: the overturning device for the shield tunnel segment loading support includes: The flexible snap-fit ​​unit is rotatably connected to the upper housing; The lifting unit, through its engagement with the elastic snap-fit ​​unit, causes the upper housing to rise. The flipping unit is used to flip the upper box in the vertical plane; A magnetic unit with a lower touch button for magnetically attaching to the upper housing and a flexible snap-fit ​​unit; After the lifting unit touches the button an odd number of times it descends, the magnetic unit will be de-energized, and the elastic snap-fit ​​unit will return to its natural state and snap into the lifting unit. After the lifting unit presses the button an even number of times, the magnetic unit will be energized. The magnetic unit will then magnetically attract the elastic locking unit, causing the elastic locking unit to separate from the lifting unit.

[0007] Optionally, the resilient snap-fit ​​unit includes: The lifting cylinder is rotatably connected to the upper housing via a rotating shaft; The locking post slides through the lifting cylinder and can be magnetically attracted and fixed by the magnetic attraction unit; The spring, which connects the locking pin and the lifting cylinder, will cause the locking pin to engage with the lifting unit in its natural state.

[0008] Optionally, the lifting unit includes: The lifting column can be vertically inserted into the lifting cylinder, and its side wall is provided with a slot for horizontal engagement of the column. The first hydraulic cylinder has a piston rod that extends vertically and is connected to the lifting column.

[0009] Optionally, the magnetic attraction unit includes: The first electromagnetic plate is located on the lower housing and is used to magnetically attract the upper housing. The second electromagnetic plate is used for magnetically attached pins.

[0010] Optionally, the flipping unit includes: The turbine is coaxially connected to the rotating shaft; The worm gear rotates around its own axis and is connected to the lifting cylinder and meshes with the turbine. The gear is coaxially connected to the worm. A rack, which is set vertically and is used to mesh with a gear, allows the upper housing to rotate 180°; The second hydraulic cylinder has a piston rod connected to a rack to cause the rack to be in or out of the gear's motion trajectory.

[0011] Optionally, it also includes a processor, and the lower touch button, the first hydraulic cylinder, and the second hydraulic cylinder are all coupled to the processor; When the lower touch button is pressed an odd number of times, it will send a flip signal to the processor. The processor will control the movement of the first hydraulic cylinder and the second hydraulic cylinder. The first hydraulic cylinder will drive the upper box to rise through the lifting column, and the second hydraulic cylinder will drive the rack to extend, so that the rack is in the upward trajectory of the gear.

[0012] Optionally, an upper touch button coupled to the processor may also be included; After the lifting cylinder rises and disengages from the rack, the upper touch button will be pressed. The upper touch button will send a reset signal to the processor, which will control the movement of the first and second hydraulic cylinders. The first hydraulic cylinder will drive the upper housing to descend and reset via the lifting column, and the second hydraulic cylinder will drive the rack to retract, causing the rack to disengage from the downward trajectory of the gear.

[0013] Optionally, a limiting unit may also be included, which includes: The slide rail is vertically arranged, and the lifting cylinder slides along the vertical direction in conjunction with the slide rail; The guide column is located on the upper housing and is located on the left and right sides of the upper housing, respectively, along with the rotating shaft; The guide rail is used to guide the column to slide during the flipping process of the upper box.

[0014] Optionally, it also includes a plug-in unit, which includes: The inserts are multiple and are located on the upper and lower sides of the upper housing; Slots, having multiple slots, are located on the upper surface of the lower housing; When the magnetic unit magnetically fixes the upper housing, the pins on the lower side of the upper housing will be inserted into the slots.

[0015] Secondly, the testing equipment provided in this application adopts the following technical solution: the testing equipment includes: Base; The gantry frame is mounted on a base; The main body of the testing machine is mounted on a gantry frame; The lower housing has two units mounted on the base; The upper housing has two parts, which are respectively located on the corresponding lower housing; A flipping device for the segment loading support of a shield tunnel, used to flip the upper box body.

[0016] In summary, this application includes the following beneficial technical effects: 1. This application simplifies the multiple operation steps of the prior art into a single press of the processor's start button by using the snap-fit ​​cooperation of the magnetic suction unit and the elastic snap-fit ​​unit, as well as the triggering logic of odd and even times, thereby greatly improving the efficiency of the loading test of the tube segment; 2. This application enables the upper housing to accurately complete a 180° rotation while rising through the composite transmission of the flipping unit, saving vertical travel space and avoiding errors caused by motor transmission. 3. This application controls the state switching of the elastic snap-fit ​​unit through the magnetic suction unit, realizing automatic locking and unlocking of the physical connection, thereby greatly improving the assembly and disassembly efficiency of the upper box, and ensuring the stability of the upper box on the lower box through the cooperation of the limit frame, the insert post and the magnetic suction unit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the test equipment in Embodiment 1 of this application; Figure 2 This is a structural schematic diagram of the crane, lifting platform, and upper box body in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the hoisting structure on the front and rear sides of the upper box in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the front side of the upper box in Embodiment 1 of this application; Figure 5 This is a schematic diagram of the structure of the test equipment in Embodiment 1 of this application after the upper box has been flipped over; Figure 6 This is a schematic diagram of the structure of the test equipment in Embodiment 2 of this application; Figure 7 This is a structural schematic diagram of the upper box and the flipping unit in Embodiment 3 of this application; Figure 8 This is a schematic diagram of the structure after the upper and lower boxes of Embodiment 3 of this application are separated; Figure 9 This is a schematic diagram of the structure of the elastic snap-fit ​​unit and the lifting unit in Embodiment 3 of this application; Figure 10 This is a schematic diagram of the structure of the flipping unit and the magnetic suction unit in Embodiment 3 of this application; Figure 11 This is a schematic diagram of the upper and lower touch buttons in Embodiment 3 of this application; Figure 12 This is a schematic diagram of the structure of the box in Embodiment 3 of this application.

[0018] Reference numerals: 1. Base; 2. Gantry frame; 3. Main body of the testing machine; 4. Lower housing; 41. Groove; 5. Upper housing; 6. Elastic snap-fit ​​unit; 61. Lifting cylinder; 62. Locking column; 63. Spring; 64. Rotating shaft; 7. Lifting unit; 71. Lifting column; 72. First hydraulic cylinder; 73. Slot; 8. Tilting unit; 81. Turbine; 82. Worm gear; 83. Gear; 84. Rack; 85. Second hydraulic cylinder; 86. Horizontal track; 9. Magnetic suction unit; 91. Lower touch button; 92. First electromagnetic plate; 93. Second electromagnetic plate; 10. Processor; 101. Upper touch button; 11. Plug-in unit; 111. Insert post; 112. Slot; 113. Limit frame; 12. Limit unit; 121. Slide rail; 122. Guide post; 123. Guide rail; 13. Crane; 131. Lifting frame; 132. Chain; 14. Lifting plate; 141. Vertical rail; 142. Bracket; 143. Stepper motor; 144. Reducer; 145. Rear shaft; 146. First bearing seat; 15. Connector; 151. Connecting plate; 152. Second bearing seat; 153. Front shaft. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0020] Example 1 This application provides a testing device. For example... Figure 1 and Figure 2 As shown, the testing equipment includes a base 1, a gantry frame 2, a testing machine body 3, a crane 13, a lower housing 4, and an upper housing 5. The gantry frame 2 is bolted to the upper surface of the base 1, and the testing machine body 3 is bolted to the gantry frame 2. There are two cranes 13, which are installed on the gantry frame 2. A lifting frame 131 is mounted on the crane 13, and chains 132 are connected to both ends of the lifting frame 131. There are two lower housings 4 and two upper housings 5. The lower housing 4 is bolted to the upper surface of the base 1, and the upper housing 5 is bolted to the upper surface of the lower housing 4.

[0021] like Figure 2 and Figure 3 As shown, lifting plates 14 are spaced apart on the rear side of the upper box 5. Vertical rails 141 are provided at both ends of the lifting plates 14. The vertical rails 141 are installed on the gantry frame 2 through brackets 142. The lifting plates 14 slide in the vertical direction and are engaged with the two vertical rails 141 so that the lifting plates 14 can only move up and down.

[0022] like Figure 3 and Figure 4As shown, a stepper motor 143 is installed on the lifting plate 14. A reducer 144 is driven to the output shaft of the stepper motor 143. A rear rotating shaft 145 is driven to the output shaft of the reducer 144. The rear rotating shaft 145 is installed at the center of the rear side of the upper housing 5.

[0023] The lifting plate 14 is also equipped with a first bearing seat 146, in which a bearing is installed. The bearing is tightly connected to the rear rotating shaft 145 to ensure the stability of the rear rotating shaft 145 during rotation.

[0024] A connector 15 is welded to the lower front side of the upper housing 5. The connector 15 is detachably connected to a connecting plate 151 by bolts. The upper end of the connecting plate 151 can be bolted to the upper front side of the upper housing 5 to ensure a stable connection between the connecting plate 151 and the upper housing 5. A second bearing seat 152 is provided on the front side of the connecting plate 151. A bearing is also installed in the second bearing seat 152. A front rotating shaft 153 is installed on the connecting plate 151. The front rotating shaft 153 is tightly inserted and fitted with the bearing to ensure the stability of the front rotating shaft 153 during rotation.

[0025] like Figures 3 to 5 As shown, before flipping the upper box 5, the upper box 5 is first removed from the lower box 4. Then, the connecting plate 151 is connected to the joint 15 and the upper box 5. Then, the two chains 132 on the lifting frame 131 are respectively connected to the lifting rings on the first bearing seat 146 and the second bearing seat 152. Then, the crane 13 will drive the upper box 5 to rise through the lifting frame 131. The stepper motor 143 will drive the upper box 5 to flip on the vertical plane through the reducer 144 and the rear rotating shaft 145. The front rotating shaft 153 will cooperate with the rear rotating shaft 145 to ensure the stability of the upper box 5 during the flipping process.

[0026] During the flipping process, the upper box 5 will rise on the track 141 via the lifting plate 14 to obtain sufficient flipping space. The flipping speed and flipping angle of the upper box 5 can be adjusted by controlling the stepper motor 143. After the upper box 5 flips 180°, the stepper motor 143 will stop, and then the upper box 5 will fall back to its original position and reconnect with the lower box 4. Then, the locking chain 132 and the connecting plate 151 will be removed, and the segment loading test can continue.

[0027] Example 2 This application also provides a testing device. For example... Figure 6As shown, the testing equipment includes a base 1, a gantry frame 2, a testing machine body 3, a lower housing 4, an upper housing 5, and a flipping device for the shield tunnel segment loading support. The gantry frame 2 is bolted to the upper surface of the base 1, and the testing machine body 3 is bolted to the gantry frame 2. There are two lower housings 4 and two upper housings 5. The lower housing 4 is bolted to the upper surface of the base 1, and the upper housing 5 is magnetically fixed to the lower housing 4 by a magnetic unit 9.

[0028] After the main body 3 of the testing machine completes the positive bending moment test on the tunnel segment, the flipping device of the shield tunnel segment loading support can flip the upper box 5 180° so that the upper box 5 can conduct a negative bending moment test on the subsequent tunnel segments of the same batch.

[0029] Example 3 This application discloses a flipping device for the loading support of shield tunnel segments. For example... Figure 6 and Figure 7 As shown, the flipping device of the shield tunnel segment loading support includes an elastic snap-fit ​​unit 6, a lifting unit 7, a flipping unit 8, and a magnetic suction unit 9. The elastic snap-fit ​​unit 6 is rotatably connected to the upper housing 5, and the magnetic suction unit 9 has a lower touch button 91.

[0030] During the segment loading test, the magnetic suction unit 9 will be energized, so that the magnetic suction unit 9 magnetically fixes the upper box 5 to the lower box 4 to ensure the stability of the upper box 5. When a negative bending moment test is required on the segment, the lifting unit 7 will descend and press the lower touch button 91. At this time, the lower touch button 91 is pressed an odd number of times, which will control the magnetic suction unit 9 to de-energize. The magnetic suction unit 9 will no longer magnetically attach the upper box 5 and the elastic snap-fit ​​unit 6. The elastic snap-fit ​​unit 6 will return to its natural state and snap-fit ​​with the lifting unit 7, so that the lifting unit 7 can drive the upper box 5 to rise through the elastic snap-fit ​​unit 6. That is, this application simultaneously completes the disassembly of the upper box 5 on the lower box 4 and the hoisting of the upper box 5 on the lifting unit 7.

[0031] Afterwards, the lifting unit 7 will lift the upper box 5, and the flipping unit 8 will rotate the upper box 5 180° on the vertical plane. Then, the lifting unit 7 will lower the upper box 5 to reset. The lifting unit 7 will press the lower touch button 91 again. At this time, the lower touch button 91 will be pressed an even number of times, which will control the magnetic suction unit 9 to be energized. The magnetic suction unit 9 will magnetically fix the upper box 5 and the elastic snap-fit ​​unit 6. The upper box 5 can continue to carry out the negative bending moment test of the tunnel segment. The elastic snap-fit ​​unit 6 will separate from the lifting unit 7. That is, this application simultaneously completes the installation of the upper box 5 on the lower box 4 and the release and hoisting of the upper box 5, thereby improving the efficiency of the tunnel segment loading test.

[0032] Because the upper housing 5 receives a large loading force during the loading test, this application also provides a plug-in unit 11 to improve the stability of the upper housing 5. This unit includes plugs 111 and slots 112. There are eight plugs 111 in total, with four plugs welded to the four corners of the upper surface of the upper housing 5 and the other four plugs welded to the four corners of the lower surface of the upper housing 5. There are four slots 112, located at the four corners of the upper surface of the lower housing 4. When the magnetic unit 9 magnetically fixes the upper housing 5 to the lower housing 4, the four plugs 111 on the lower side of the upper housing 5 will be plugged into the four slots 112. The plugging and engaging of the plugs 111 and slots 112 improves the stability of the upper housing 5 on the lower housing 4.

[0033] like Figure 7 and Figure 8 As shown, to further improve the stability of the upper housing 5, the insertion unit 11 also includes a limiting frame 113, which is welded to the upper surface of the lower housing 4. When the magnetic unit 9 magnetically fixes the upper housing 5 to the lower housing 4, the lower part of the upper housing 5 will be inserted into the limiting frame 113, and the side of the upper housing 5 away from the tube segment will be blocked and limited by the limiting frame 113, so that the limiting frame 113 can further limit and fix the upper housing 5.

[0034] like Figure 9 As shown, the elastic locking unit 6 includes a lifting cylinder 61, a locking pin 62, and a spring 63. The lifting cylinder 61 is rotatably connected to the upper housing 5 via a rotating shaft 64. The locking pin 62 slides horizontally through the lifting cylinder 61. The two ends of the spring 63 are fixedly connected to the locking pin 62 and the lifting cylinder 61, respectively. When the magnetic attraction unit 9 magnetically fixes the locking pin 62, the spring 63 will be in a deformed state. When the magnetic attraction unit 9 is de-energized, the spring 63 will return to its natural state and cause the locking pin 62 to engage with the lifting unit 7, thereby simultaneously realizing the disassembly of the upper housing 5 onto the lower housing 4 and the hoisting of the upper housing 5.

[0035] It is worth noting that there are two locking posts 62, which are located on both sides of the lifting cylinder 61. The two locking posts 62 are engaged with the lifting unit 7, thereby improving the stability of the connection between the elastic locking unit 6 and the lifting unit 7.

[0036] like Figure 9 and Figure 10As shown, the lifting unit 7 includes a lifting column 71 and a first hydraulic cylinder 72. Both side walls of the lifting column 71 are provided with slots 73 for horizontal engagement with the locking pin 62. The first hydraulic cylinder 72 is mounted on the gantry frame 2, and its piston rod extends vertically and connects to the lifting column 71. When the first hydraulic cylinder 72 lowers the lifting column 71, the lifting column 71 vertically inserts into the lifting cylinder 61, and the touch button 91 is pressed. The locking pin 62 engages in the slots 73, thus achieving the engagement between the lifting unit 7 and the elastic locking unit 6.

[0037] It is worth noting that the insertion and connection between the lifting column 71 and the lifting cylinder 61 improves the stability of the connection between the lifting unit 7 and the elastic snap-fit ​​unit 6.

[0038] like Figure 8 and Figure 9 As shown, the magnetic suction unit 9 includes a first electromagnetic plate 92 and a second electromagnetic plate 93. The upper surface of the lower housing 4 is provided with a groove 41. The first electromagnetic plate 92 is fixedly installed in the groove 41. There are two second electromagnetic plates 93, both of which are installed on the base 1. When the first electromagnetic plate 92 and the second electromagnetic plate 93 are energized, the first electromagnetic plate 92 will magnetically fix the bottom of the upper housing 5 to the upper surface of the lower housing 4 to ensure the stability of the upper housing 5. The two second electromagnetic plates 93 will magnetically fix the corresponding locking pins 62, so that the locking pins 62 are disengaged from the inside of the lifting cylinder 61, so that the lifting column 71 can be vertically inserted into the lifting cylinder 61 and the touch button 91 can be pressed.

[0039] like Figure 7 and Figure 10 As shown, the tilting unit 8 includes a turbine 81, a worm 82, a gear 83, a rack 84, and a second hydraulic cylinder 85. The turbine 81 is fixedly mounted on the rotating shaft 64. The worm 82 rotates around its own axis and is connected to the lifting cylinder 61 and meshes with the turbine 81. There are two gears 83, which are fixedly mounted on both ends of the worm 82. There are two racks 84, which are arranged vertically. There are two second hydraulic cylinders 85, and their piston rods are connected to the racks 84. As the lifting unit 7 drives the upper housing 5 to rise, the second hydraulic cylinder 85 will drive the rack 84 to move, so that the rack 84 moves to the rising trajectory of the gear 83. During the rising process, the gear 83 will mesh with the rack 84, so that the gear 83 drives the turbine 81 to rotate through the worm 82. The turbine 81 will drive the upper housing 5 to flip through the rotating shaft 64. By pre-designing the length of the rack 84 and the size of the gear 83, worm 82 and turbine 81, the upper housing 5 can be accurately flipped 180°. Compared with the prior art where the upper housing 5 is driven to rotate by a motor, this application avoids the generation of rotation error, so that the upper housing 5 can be accurately docked with the lower housing 4 after flipping.

[0040] To ensure the stability of the rack 84 during movement and when it meshes with the gear 83, horizontal rails 86 fixed on the gantry 2 are provided on both the upper and lower sides of the rack 84. The upper and lower ends of the rack 84 are slidably engaged with the two horizontal rails 86 respectively. The rack 84 and the horizontal rails 86 are slidably engaged to improve the stability of the rack 84.

[0041] It is worth noting that the turbine 81 and worm gear 82 have a self-locking function. When the gear 83 is not engaged with the rack 84, the gear 83 will not be subjected to external force, so that the upper housing 5 can remain stable on the lifting cylinder 61.

[0042] like Figure 7 As shown, the rotating shaft 64 is located at the center of the side of the upper housing 5, thereby minimizing the space required for the upper housing 5 to flip. This allows the upper housing 5 to be flipped by simply rising to a lower height. Furthermore, the upper housing 5 flips while rising, and the rising and flipping are carried out simultaneously, which shortens the time required for the upper housing 5 to flip, thereby further improving the efficiency of the segment loading test.

[0043] like Figures 10 to 12 As shown, in order to improve the stability of the upper box 5 during the flipping process, this application also provides a limiting unit 12. The limiting unit 12 includes a slide rail 121, a guide post 122, and a guide rail 123. The slide rail 121 is vertically arranged, and the lifting cylinder 61 slides and cooperates with the slide rail 121 in the vertical direction, which improves the stability of the lifting cylinder 61 and the upper box 5 during the lifting process. There are two guide posts 122, which are welded to the upper and lower ends of the side of the upper box 5 respectively. The guide posts 122 and the rotating shaft 64 are respectively located on the left and right sides of the upper box 5. During the flipping process of the upper box 5, both guide posts 122 will slide on the guide rail 123. The groove on the guide rail 123 is designed according to the simulated motion trajectory of the two guide posts 122. The cooperation between the guide posts 122 and the guide rail 123 realizes the support of the side of the upper box 5, thereby improving the stability of the upper box 5 during the flipping process.

[0044] It is worth noting that the slide rail 121 limits the movement trajectory of the lifting cylinder 61; the guide rail 123 and the guide column 122 cooperate to limit the flipping trajectory of the upper box 5; the gear 83 and the rack 84 cooperate to limit the flipping angle of the upper box 5; through the above multiple limiting, it is ensured that the upper box 5 will move along the specified trajectory, so that the upper box 5 can accurately dock with the lower box 4 after flipping.

[0045] like Figure 6 and Figure 10As shown, in order to improve the smoothness of the upper housing 5 during the flipping process and thus improve the loading test efficiency of the tube segments, this application also provides a processor 10, and the lower touch button 91, the first hydraulic cylinder 72 and the second hydraulic cylinder 85 are all coupled to the processor 10.

[0046] When a negative bending moment test of the tunnel segments is required, the worker controls the first hydraulic cylinder 72 to lower the lifting column 71. The lifting column 71 will then be inserted into the lifting cylinder 61, and the lower touch button 91 will be pressed. At this time, the lower touch button 91 will be pressed an odd number of times, which will de-energize the first electromagnetic plate 92 and the second electromagnetic plate 93. The first electromagnetic plate 92 will no longer magnetically attract the upper housing 5, and the second electromagnetic plate 93 will no longer magnetically attract the locking column 62. The spring 63 will return to its natural state and cause the locking column 62 to engage in the locking groove 73 of the lifting column 71, thus realizing the connection between the lifting column 71 and the lifting cylinder 61. The two cylinders engage in a snap-fit ​​mechanism. Simultaneously, the lower touch button 91 sends a flip signal to the processor 10. The processor 10 controls the movement of the first hydraulic cylinder 72 and the second hydraulic cylinder 85. The first hydraulic cylinder 72 drives the lifting column 71 to rise, and the lifting column 71 drives the upper housing 5 to rise through the lifting cylinder 61. The second hydraulic cylinder 85 drives the rack 84 to extend, so that the rack 84 is located on the rising trajectory of the gear 83. During the rising process, the upper housing 5 drives the gear 83 to mesh with the rack 84. The rack 84 drives the upper housing 5 to flip 180° through the flip unit 8, so that the upper housing 5 flips while rising.

[0047] like Figure 10 and Figure 11 As shown, in order to further improve the smoothness of the upper housing 5 during the flipping process and improve the loading test efficiency of the tube segment, this application also provides an upper touch button 101, which is coupled to the processor 10.

[0048] After the upper housing 5 has completed its flip, the gear 83 will disengage from the rack 84, and the lifting cylinder 61 will press the upper touch button 101. The upper touch button 101 will send a reset signal to the processor 10, and the processor 10 will control the movement of the first hydraulic cylinder 72 and the second hydraulic cylinder 85. The first hydraulic cylinder 72 will drive the lifting column 71 to descend, and the lifting column 71 will drive the upper housing 5 to descend and reset through the lifting cylinder 61. The second hydraulic cylinder 85 will drive the rack 84 to retract, so that the rack 84 will disengage from the descent trajectory of the gear 83. That is, the upper housing 5 will no longer flip during the descent process, so as to ensure that the upper housing 5 can be accurately inverted onto the lower housing 4.

[0049] After the upper housing 5 and the lower housing 4 are accurately aligned, the insert 111 of the upper housing 5 will be inserted into the slot 112 of the lower housing 4, and the lower part of the upper housing 5 will be embedded in the limiting frame 113. The lifting column 71 will press the lower touch button 91 again. At this time, the lower touch button 91 will be pressed an even number of times. The lower touch button 91 will control the first electromagnetic plate 92 and the second electromagnetic plate 93 to be energized. The first electromagnetic plate 92 will magnetically fix the upper housing 5 to the lower housing 4, and the second electromagnetic plate 93 will magnetically fix the locking column 62. The locking column 62 will disengage from the locking slot 73. At the same time, the lower touch button 91 will send a return signal to the processor 10. The processor 10 will control the first hydraulic cylinder 72 to move. The first hydraulic cylinder 72 will drive the lifting column 71 to rise and reset, so that the lifting column 71 can continue to flip the upper housing 5 in the subsequent process.

[0050] The implementation principle of the overturning device for the shield tunnel segment loading support in this embodiment is as follows: When a negative bending moment test of the segment is required, the worker will press the start button on the processor 10. The processor 10 will control the first hydraulic cylinder 72 to drive the lifting column 71 to descend. The lifting column 71 will be inserted downward into the lifting cylinder 61 and the lower touch button 91 will be pressed. At this time, the lower touch button 91 will be pressed an odd number of times. The lower touch button 91 will control the first electromagnetic plate 92 and the second electromagnetic plate 93 to be de-energized. The first electromagnetic plate 92 will no longer magnetically attract the upper housing 5, and the second electromagnetic plate 93 will no longer magnetically attract the locking column 62. The spring 63 will return to its natural state and cause the locking column 62 to engage with the lifting cylinder 61. Within the slot 73 of the lifting column 71, the lifting column 71 is connected to the lifting cylinder 61. Simultaneously, the lower touch button 91 sends a flip signal to the processor 10, which controls the movement of the first hydraulic cylinder 72 and the second hydraulic cylinder 85. The first hydraulic cylinder 72 drives the lifting column 71 to rise, and the lifting column 71 drives the upper housing 5 to rise through the lifting cylinder 61. The second hydraulic cylinder 85 drives the rack 84 to extend, so that the rack 84 is located on the rising trajectory of the gear 83. During the rising process, the upper housing 5 drives the gear 83 to mesh with the rack 84. The rack 84 drives the upper housing 5 to flip 180° through the flip unit 8, so that the upper housing 5 flips while rising.

[0051] After the upper housing 5 completes its flip, gear 83 will disengage from rack 84, and lifting cylinder 61 will press upper touch button 101. Upper touch button 101 will send a reset signal to processor 10. Processor 10 will control the movement of first hydraulic cylinder 72 and second hydraulic cylinder 85. First hydraulic cylinder 72 will drive lifting column 71 to descend. Lifting column 71 will drive upper housing 5 to descend and reset via lifting cylinder 61. Second hydraulic cylinder 85 will drive rack 84 to retract, so that rack 84 disengages from the descent trajectory of gear 83, ensuring that upper housing 5 does not flip during descent, so that upper housing 5 can be accurately inverted onto lower housing 4.

[0052] After the upper housing 5 and the lower housing 4 are accurately aligned, the insert 111 of the upper housing 5 will be inserted into the slot 112 of the lower housing 4, and the lower part of the upper housing 5 will be embedded in the limiting frame 113. The lifting column 71 will press the lower touch button 91 again. At this time, the lower touch button 91 will be pressed an even number of times. The lower touch button 91 will control the first electromagnetic plate 92 and the second electromagnetic plate 93 to be energized. The first electromagnetic plate 92 will magnetically fix the upper housing 5 to the lower housing 4, and the second electromagnetic plate 93 will magnetically fix the locking column 62. The locking column 62 will disengage from the locking slot 73. At the same time, the lower touch button 91 will send a return signal to the processor 10. The processor 10 will control the first hydraulic cylinder 72 to move. The first hydraulic cylinder 72 will drive the lifting column 71 to rise and reset, so that the lifting column 71 can continue to flip the upper housing 5 in the subsequent process.

[0053] In summary, the worker only needs to press the start button on the processor 10 once, and this application can automatically and continuously complete the compound action triggered by odd and even number of presses, thereby significantly improving the test loading efficiency of the tube segments. In addition, this application controls the state switching of the elastic snap-fit ​​unit 6 through the magnetic suction unit 9 to realize the automatic locking and unlocking of the physical connection, thereby greatly improving the disassembly and assembly efficiency of the upper housing 5 and ensuring the stability of the upper housing 5 on the lower housing 4. Moreover, this application, through the compound transmission of the flipping unit 8, enables the upper housing 5 to accurately complete a 180° flip while rising, saving vertical travel space and avoiding errors caused by motor transmission.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flipping device for the loading support of shield tunnel segments, characterized in that: include: The flexible snap-fit ​​unit (6) is rotatably connected to the upper housing (5); The lifting unit (7) drives the upper box (5) to rise by engaging with the elastic snap-fit ​​unit (6); The flipping unit (8) is used to drive the upper box (5) to flip in the vertical plane; A magnetic unit (9) has a lower touch button (91) and is used to magnetically attach the upper housing (5) and the flexible snap-fit ​​unit (6). After the lifting unit (7) touches the button (91) during an odd number of downward presses, the magnetic unit (9) will be de-energized, and the elastic snap-fit ​​unit (6) will return to its natural state and snap into the lifting unit (7). After the lifting unit (7) presses the button (91) an even number of times, the magnetic unit (9) will be energized, and the magnetic unit (9) will magnetically attract the elastic snap-fit ​​unit (6), causing the elastic snap-fit ​​unit (6) to separate from the lifting unit (7).

2. The flipping device for the shield tunnel segment loading support according to claim 1, characterized in that: The elastic snap-fit ​​unit (6) includes: The lifting cylinder (61) is rotatably connected to the upper box (5) via a rotating shaft (64); The locking post (62) slides through the lifting cylinder (61) and can be magnetically fixed by the magnetic unit (9); A spring (63), which is connected to the locking post (62) and the lifting cylinder (61), will cause the locking post (62) to engage with the lifting unit (7) in its natural state.

3. The flipping device for the shield tunnel segment loading support according to claim 2, characterized in that: The lifting unit (7) includes: The lifting column (71) can be vertically inserted into the lifting cylinder (61), and its side wall is provided with a slot (73) for the horizontal engagement of the locking column (62). The first hydraulic cylinder (72) has a piston rod that extends vertically and is connected to the lifting column (71).

4. The flipping device for the shield tunnel segment loading support according to claim 2, characterized in that: The magnetic attraction unit (9) includes: The first electromagnetic plate (92) is located on the lower box (4) and is used to magnetically attract the upper box (5). The second electromagnetic plate (93) is used for magnetically attached pins (62).

5. The flipping device for the shield tunnel segment loading support according to claim 3, characterized in that: The flipping unit (8) includes: Turbine (81), which is coaxially connected to rotating shaft (64); The worm (82) rotates about its own axis and is connected to the lifting cylinder (61) and meshes with the turbine (81). Gear (83), which is coaxially connected to worm (82); A rack (84) is arranged vertically and is used to mesh with a gear (83) so that the upper housing (5) is rotated 180°; The second hydraulic cylinder (85) has a piston rod connected to the rack (84) to cause the rack (84) to be in or out of the motion trajectory of the gear (83).

6. The flipping device for the shield tunnel segment loading support according to claim 5, characterized in that: It also includes a processor (10), a lower touch button (91), a first hydraulic cylinder (72), and a second hydraulic cylinder (85), all of which are coupled to the processor (10). When the lower touch button (91) is pressed an odd number of times, it will send a flip signal to the processor (10). The processor (10) will control the first hydraulic cylinder (72) and the second hydraulic cylinder (85) to move. The first hydraulic cylinder (72) will drive the upper box (5) to rise through the lifting column (71). The second hydraulic cylinder (85) will drive the rack (84) to extend, so that the rack (84) is located on the rising trajectory of the gear (83).

7. The flipping device for the shield tunnel segment loading support according to claim 6, characterized in that: It also includes an upper touch button (101), which is coupled to the processor (10). After the gear (83) rises and disengages from the rack (84), the lifting cylinder (61) will press the upper touch button (101). The upper touch button (101) will send a reset signal to the processor (10). The processor (10) will control the first hydraulic cylinder (72) and the second hydraulic cylinder (85) to move. The first hydraulic cylinder (72) will drive the upper box (5) to descend and reset through the lifting column (71). The second hydraulic cylinder (85) will drive the rack (84) to retract, so that the rack (84) disengages from the descending trajectory of the gear (83).

8. The flipping device for the shield tunnel segment loading support according to claim 2, characterized in that: It also includes a limiting unit (12), which includes: The slide rail (121) is vertically arranged, and the lifting cylinder (61) slides and engages with the slide rail (121) in the vertical direction. The guide column (122) is located on the upper box (5) and is located on the left and right sides of the upper box (5) respectively with the rotating shaft (64); The guide rail (123) is used to slide the guide column (122) during the flipping process of the upper box (5).

9. The flipping device for the shield tunnel segment loading support according to claim 1, characterized in that: It also includes a plug-in unit (11), which includes: Insertion post (111), which has multiple ones and is located on the upper and lower sides of the upper box (5); Slots (112), having multiple slots disposed on the upper surface of the lower housing (4); When the magnetic unit (9) magnetically fixes the upper box (5), the plug (111) on the lower side of the upper box (5) will be inserted into the slot (112).

10. The testing equipment, characterized in that: include: Base (1); Gantry frame (2), which is mounted on base (1); The main body of the testing machine (3) is mounted on the gantry (2); The lower housing (4) has two units mounted on the base (1); The upper box (5) has two parts, which are respectively located on the corresponding lower box (4); The flipping device of the shield tunnel segment loading support as described in any one of claims 1-9 is used to flip the upper box (5).

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