Auxiliary device for 3D printing of high-toughness fiber concrete material structural member

Abstract

The invention is suitable for the technical field of concrete structural members, and provides an auxiliary device for 3D printing of a high-toughness fiber concrete material structural member, the auxiliary device comprises a bottom inverted arch block, two side curved wall blocks and a top arc-shaped block, and bottom limiting blocks are arranged on two planes of the upper side of the bottom inverted arch block; movable cavities are formed in the left side and the right side of the top arc-shaped block, a first inserting cavity is formed in the bottom of the side curved wall block, a communicating groove communicating with the first inserting cavity is formed in the lower surface of the side curved wall block, the bottom limiting block is inserted into the first inserting cavity through the communicating groove, and a locking structure is arranged on the bottom limiting block; a movable cavity is formed in the bottom inverted arch block, a movable top limiting block is arranged in the movable cavity, and the lower side of the top limiting block slidably penetrates out of the lower side plane of the top arc-shaped block, so that the bottom inverted arch block, the side curved wall block and the top arc-shaped block can be quickly assembled, and the mounting steps of the concrete structural member are reduced; and the mounting efficiency and speed of the concrete structural member are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete structural members, and more specifically, it relates to an auxiliary device for 3D printing high-strength and tough fiber concrete material structural members. Background Art

[0002] Compared with traditional concrete processes, the existing concrete 3D printing technology has advantages such as high efficiency and high precision, and is more suitable for the processing and manufacturing of complex concrete structural members. It is widely used in tunnel precast lining structures. For example, the required concrete structural members are prefabricated and processed in the factory through 3D printing technology, and the prefabricated concrete structural members are transported to the tunnel by vehicles for installation. However, due to factors such as structural stress and lifting capacity of concrete structural members, they are generally prefabricated in a segmented manner. When most existing concrete structural members are assembled in the tunnel, in order to ensure the installation strength between structural members, fixing structures such as bolts are generally screwed between structural members to strengthen the connection strength between structural members. However, this method increases the installation steps of concrete structural members, thereby reducing the installation efficiency of concrete structural members in the tunnel. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an auxiliary device for 3D printing high-strength and tough fiber concrete material structural members.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: An auxiliary device for 3D printing high-strength and tough fiber concrete material structural members, including a bottom invert block, two side curved wall blocks, and a top arc block. Bottom limiting blocks are arranged on both planes on the upper side of the bottom invert block. Activity cavities are opened on the left and right sides of the top arc block. A first insertion cavity is opened at the bottom of the side curved wall block, and a communication groove communicating with the first insertion cavity is opened on the lower surface of the side curved wall block. The bottom limiting block is inserted into the first insertion cavity through the communication groove. A locking structure is arranged on the bottom limiting block. A movable top limiting block is arranged in the activity cavity. The lower side of the top limiting block slides through the lower plane of the top arc block. A second insertion cavity is opened at the top of the side curved wall block, and an insertion groove communicating with the second insertion cavity is opened on the upper surface of the side curved wall block. The lower side of the top limiting block extends into the second insertion cavity through the insertion groove. A transmission structure for controlling the operation of the locking structure is arranged in the second insertion cavity. A contraction structure for controlling the contraction of the top limiting block is arranged on the lower side of the arc surface of the top arc block.

[0005] The present invention is further arranged as follows: A fixed anti-seepage block is arranged on the rear surface of the bottom invert block, and a fixed anti-seepage groove adapted to the fixed anti-seepage block is opened on the front surface of the bottom invert block.

[0006] The present invention is further configured as follows: The locking structure includes two rotating disks, which are respectively arranged on the left and right sides above the bottom limiting block. Rotating grooves are provided on the left and right sides above the bottom limiting block. The rotating disks rotate in the rotating grooves. Two transmission cavities communicating with the two rotating grooves are provided in the bottom limiting block. The bottom wall of the transmission cavity is rotatably connected with a worm. A number of worm gear teeth arranged in a circumferential array are provided on the outer surface of the rotating disk. The worm gear teeth extend into the transmission cavity through the rotating groove and are meshed with the worm. The spiral teeth on the two worms are arranged in opposite directions. A pressing plate is provided on the outer surface of the rotating disk. The pressing plate extends out of the bottom limiting block through the rotating groove. After the rotating disk rotates close to 90 degrees, the side of the pressing plate away from the rotating disk contacts the bottom of the first insertion cavity.

[0007] The present invention is further configured as follows: The transmission structure includes a third gear, which is rotatably connected in the second insertion cavity. A rack is meshed with the right side of the third gear. A movable plate is provided on the lower side of the rack. A tooth groove extending out of its lower surface is provided on the side of the top limiting block facing the third gear. A transmission wire is provided on the lower side of the movable plate. The lower end of the transmission wire slides through the first insertion cavity. A guiding wheel is rotatably connected in the first insertion cavity. One end of the transmission wire located in the first insertion cavity is arranged on the outer surface of the guiding wheel. The upper end of the worm rotates through the upper surface of the bottom limiting block. A first gear is sleeved on the upper end of the worm. A sleeve plate is provided on the inner wall of the first insertion cavity. A transmission shaft is rotatably sleeved on the sleeve plate. A second gear meshed with the first gear is provided at the lower end of the transmission shaft. An installation plate is provided at the lower end of the transmission wire. A twist rod is rotatably connected to the lower surface of the installation plate. A twist groove adapted to the twist rod is provided on the upper surface of the transmission shaft. A first tension spring movably sleeved on the outer surface of the twist rod is provided between the installation plate and the upper surface of the sleeve plate.

[0008] The present invention is further configured as follows: A contraction cavity is provided at the top of the side curved wall block. A limiting plate is provided in the contraction cavity. One side of the limiting plate slides through the insertion groove. The side of the limiting plate close to the insertion groove is an isosceles triangle. An inner plate sliding in the contraction cavity is provided on the side of the limiting plate located in the contraction cavity. A first spring movably sleeved on the outer surface of the limiting plate is provided between the inner plate and the inner wall of the contraction cavity. A trigger rod with its upper end sliding through the contraction cavity is provided in the second insertion cavity. The lower side of the trigger rod can contact the upper surface of the movable plate. A first rotating plate is hinged between the upper end of the trigger rod and the inner plate. A limiting groove adapted to the insertion groove is provided on the side of the top limiting block close to the contraction cavity.

[0009] The present invention is further configured as follows: the contraction structure includes a lifting plate, the lifting plate is arranged on the lower side of the curved surface of the top arc block, the lower surface of the top arc block is provided with a lifting groove, the outer surface of the lifting plate is in contact with the inner wall of the lifting groove and slides in the lifting groove, the upper surface of the lifting plate is provided with a pushing rod, and the top arc block is provided with a pushing cavity located on the upper side of the lifting groove, the upper end of the pushing rod slides into the pushing cavity, and a second spring movably sleeved on the outer surface of the pushing rod is provided between the lifting plate and the top wall of the lifting groove, and the pushing rod is located in the pushing cavity. The left and right side surfaces of the pushing rod are also provided with a transmission line, and the pushing cavity is also rotatably connected with two directional wheels, the transmission line located in the pushing cavity contacts the lower surface of the directional wheel, and the other end of the transmission line slides into the active cavity, and one end of the transmission line located in the active cavity is provided with a built-in limiting plate sliding in the active cavity, the built-in limiting plate is connected to the upper side of the top limiting block, and a second tension spring movably sleeved on the outer surface of the top limiting block is provided between the built-in limiting plate and the bottom wall of the active cavity.

[0010] The present invention is further configured as follows: a control cavity is provided in the middle section of the two side curved wall blocks, and two control cavities are also provided in the top arc block, and the transmission line slides through the control cavity, and the control cavities on the side curved wall blocks and the top arc block are provided with a movable anti-seepage structure controlled by the transmission line, and the movable anti-seepage structure includes two parallel control rods, and the two control rods are rotatably connected between the front and rear inner walls of the control cavity, and the outer surfaces of the two control rods are sleeved with two transmission wheels, and the transmission line is arranged in an S-shaped bending in a section of the control cavity, and is respectively connected to the outer surfaces of the two transmission wheels for transmission, and the front sides of the side curved wall blocks and the top arc block are provided with movable anti-seepage grooves, and the rear surfaces of the side curved wall blocks and the top arc block are provided with storage grooves, and movable anti-seepage blocks adapted to the movable anti-seepage grooves are slidably connected in the storage grooves, and the outer surfaces of the movable anti-seepage blocks The surface is also fitted with the inner wall of the storage groove, and the rear ends of the two control rods are rotated to pass through the storage groove, and two swing plates are arranged at the rear ends of the two control rods, and two fixed plates arranged parallel to each other are arranged on the front inner wall of the storage groove, and the two swing plates are located between the two fixed plates, and a connecting slide bar is arranged between the two fixed plates, and the outer surface sliding sleeve of the connecting slide bar is provided with two connecting slide sleeves, and two second rotating plates are hinged between the two connecting slide sleeves and the movable anti-seepage block, and two transverse slide plates are arranged on the front side of the two connecting slide sleeves, and a movable column is arranged on the side of the swing plate away from the control rod, and a limiting slide groove is opened on the surface of the transverse slide facing the movable column, and the vertical cross-section of the limiting slide groove is a combination of a circle and a square, and the end of the movable column away from the swing plate extends into the limiting slide groove, and the movable column is located in the limiting slide groove. A sliding ball sliding in the circular groove of the limiting slide groove is arranged at one end.

[0011] The advantages of the present invention are: First, the present invention can quickly assemble the bottom inverted arch block, the side curved wall block, and the top arc block, reducing the installation steps of the concrete structural members and improving the installation efficiency and speed of the concrete structural members.

[0012] Second, by setting the bottom locking structure, the bottom locking structure between the side curved wall block and the bottom inverted arch block is arranged inside and will not be exposed outside, reducing the problem of corrosion of the bottom locking structure. At the same time, the bottom locking structure is driven by a worm, and the worm drive has a self-locking effect. Therefore, after the top pressing plate presses against the bottom of the side curved wall block, there will be no problem of reverse rotation of the top pressing plate, further improving the firmness of the installation between the side curved wall block and the bottom inverted arch block.

[0013] Third, by setting the transmission structure, after the top arc block is installed on the side curved wall block, the locking structure can be automatically controlled to operate without manual control, reducing the efficiency and speed during the assembly of the concrete structural members.

[0014] Fourth, after the top limiting block is inserted into the second insertion cavity, the right side of the limiting plate is inserted into the limiting groove to complete the fixation of the top limiting block, minimizing the problem of loosening of the top limiting block and further ensuring the firm connection between the top arc block and the side curved wall block.

[0015] Fifth, by setting the movable anti-seepage structure, after the concrete structural members are assembled and installed, the displacement of the movable anti-seepage block can be automatically controlled, increasing the connection tightness and seepage path between adjacent concrete structural members and further improving the anti-seepage effect after the installation of the concrete structural members. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the auxiliary device for the 3D printing of high-strength and tough fiber concrete material structural members of the present invention; Figure 2 is the main view plan of the internal structure of the concrete material structural members of the present invention; Figure 3 is Figure 2 the enlarged view at A in Figure 4 is Figure 2 the enlarged view at B in Figure 5 is Figure 2 the enlarged view at C in Figure 6 is the side view plan of the movable anti-seepage structure of the present invention; Figure 7 is the cross-sectional view schematic diagram of the transverse sliding plate of the present invention; Figure 8 is Figure 4Enlarged view at position D in the [Chinese context].

[0017] In the figure: 1. Bottom inverted arch block; 11. Bottom limiting block; 12. First insertion cavity; 13. Rotation groove; 14. Rotation disk; 15. Tightening plate; 16. Transmission cavity; 17. Worm; 18. Worm gear teeth; 19. First gear; 110. Sleeve plate; 111. Transmission shaft; 112. Second gear; 113. Mounting plate; 114. Twisted rod; 115. First tension spring; 2. Side curved wall block; 21. Second insertion cavity; 22. Insertion groove; 23. Movable plate; 24. Rack; 25. Shrinkage cavity; 26. Limiting plate; 27. Built-in plate; 28. Trigger rod; 29. First rotating plate; 210. First spring; 211. Third gear; 3. Top arc block; 31. Movable cavity; 32. Top limiting block; 33. Built-in limiting plate; 34. Second tension spring; 35. Pushing cavity; 36. Lifting groove; 37. Pushing rod; 38. Second spring; 39. Tooth groove; 310. Limiting groove; 311. Lifting plate 4. Fixed anti-seepage groove; 5. Fixed anti-seepage block; 6. Movable anti-seepage structure; 61. Control cavity; 62. Control rod; 63. Transmission wheel; 64. Storage groove; 65. Movable anti-seepage block; 66. Movable anti-seepage groove; 67. Swing plate; 68. Fixed plate; 69. Connecting slide bar; 610. Connecting sliding sleeve; 611. Second rotating plate; 612. Movable column; 613. Horizontal sliding plate; 614. Limiting sliding groove; 615. Sliding ball; 7. Transmission line; 8. Directional wheel. Detailed implementation method

[0018] Please refer to Figures 1-8 , the present invention provides the following technical solutions: Specifically, it refers to an auxiliary device for 3D printing high-strength and tough fiber concrete material structural components, including a bottom inverted arch block 1, two side curved wall blocks 2, and a top arc block 3. At the same time, the bottom inverted arch block 1, the two side curved wall blocks 2, and the top arc block 3 are all made of high-strength and tough fiber concrete material by 3D printing. The structural components made of high-strength and tough fiber concrete material have the characteristics of high strength and high toughness. After being prefabricated in the factory, they are sent to the tunnel for assembly. The bottom of the bottom inverted arch block 1 is provided with a slot for the forklift to insert. Therefore, during the assembly process, the bottom inverted arch block 1 is first installed on the ground of the tunnel by the forklift, and expansion bolts for fixing are arranged between the ground and the bottom inverted arch block 1. Then, the two side curved wall blocks 2 are sequentially installed on the bottom inverted arch block 1. Finally, the top arc block 3 is installed on the two side curved wall blocks 2 by a lifting device to complete the assembly of the tunnel lining structure.

[0019] A fixed anti-seepage block 5 is provided on the rear side surface of the bottom invert block 1, and a fixed anti-seepage groove 4 adapted to the fixed anti-seepage block 5 is provided on the front side surface of the bottom invert block 1. Therefore, when multiple bottom invert blocks 1 are sequentially installed on the tunnel floor, the fixed anti-seepage blocks 5 on adjacent two bottom invert blocks 1 extend into the fixed anti-seepage groove 4, which increases the contact surface between the two bottom invert blocks 1, thereby increasing the anti-seepage path between the two bottom invert blocks 1 and ensuring the anti-seepage effect of the joint between the bottom invert blocks 1.

[0020] Bottom locking structures for fixing the side curved wall blocks 2 are provided on both of the two flat surfaces on the upper side of the bottom invert block 1. The bottom locking structure includes a bottom limiting block 11. The bottom limiting block 11 is arranged on the upper flat surface of the bottom invert block 1. A first insertion cavity 12 is provided at the bottom of the side curved wall block 2, and a communication groove communicating with the first insertion cavity 12 is provided on the lower surface of the side curved wall block 2. When the side curved wall block 2 is installed on the bottom invert block 1, the bottom limiting block 11 is inserted into the first insertion cavity 12 through the communication groove. Rotation grooves 13 are provided on the left and right sides on the upper side of the bottom limiting block 11. A rotating disk 14 is rotatably connected in the rotation groove 13. Two transmission cavities 16 respectively communicating with the two rotation grooves 13 are provided in the bottom limiting block 11. A worm 17 is rotatably connected to the bottom wall of the transmission cavity 16. A number of worm gear teeth 18 arranged in a circumferential array are provided on the outer surface of the rotating disk 14. The worm gear teeth 18 extend into the transmission cavity 16 through the rotation groove 13 and are meshed with the worm 17. At the same time, the spiral teeth on the two worms 17 are arranged in opposite directions. Therefore, when the two worms 17 rotate in the same direction, the two rotating disks 14 can be driven to rotate in opposite directions. A pressing plate 15 is provided on the outer surface of the rotating disk 14. The pressing plate 15 extends out of the bottom limiting block 11 through the rotation groove 13. When the two rotating disks 14 rotate to the left and right sides respectively, the pressing plate 15 rotates synchronously with the rotating disk 14. When the rotating disk 14 rotates close to 90 degrees, the side of the pressing plate 15 away from the rotating disk 14 contacts the bottom of the first insertion cavity 12, so that a downward pressure can be applied to the bottom of the side curved wall block 2, making the contact surface between the side curved wall block 2 and the bottom invert block 1 fit tightly. After the rotating disk 14 rotates to 90 degrees, the surface of the pressing plate 15 fits with the bottom wall of the first insertion cavity 12, thereby completing the fixation between the side curved wall block 2 and the bottom invert block 1. Using the above structure, the bottom locking structure between the side curved wall block 2 and the bottom invert block 1 is arranged inside and will not be exposed outside, reducing the problem of corrosion of the bottom locking structure. At the same time, the bottom locking structure is in the form of worm drive, and the worm drive has a self-locking effect. Therefore, after the pressing plate 15 presses the bottom of the side curved wall block 2 tightly, the problem of reverse rotation of the pressing plate 15 will not occur, further improving the firmness after installation between the side curved wall block 2 and the bottom invert block 1.

[0021] Activity cavities 31 are provided on both the left and right sides of the top arc-shaped block 3. A top locking structure is arranged in the activity cavity 31. The top locking structure includes a top limiting block 32. The top limiting block 32 is arranged in the activity cavity 31. The lower side of the top limiting block 32 slides through the lower plane of the top arc-shaped block 3. A second insertion cavity 21 is provided at the top of the side curved wall block 2. An insertion groove 22 communicating with the second insertion cavity 21 is provided on the upper surface of the side curved wall block 2. The lower side of the top limiting block 32 extends into the second insertion cavity 21 through the insertion groove 22, thus completing the fixation between the top arc-shaped block 3 and the side curved wall block 2.

[0022] A transmission structure for controlling the rotation of the control worm 17 is provided in the second insertion cavity 21. The transmission structure includes a third gear 211 which is rotatably connected in the second insertion cavity 21. A rack 24 is meshed and connected to the right side of the third gear 211. A movable plate 23 is provided on the lower side of the rack 24. A tooth groove 39 extending out of its lower surface is formed on the side of the top limiting block 32 facing the third gear 211. A transmission wire 7 is provided on the lower side of the movable plate 23. The lower end of the transmission wire 7 slidably penetrates into the first insertion cavity 12. A guiding wheel 8 is rotatably connected in the first insertion cavity 12. One end of the transmission wire 7 located in the first insertion cavity 12 is laid on the outer surface of the guiding wheel 8. The upper end of the worm 17 rotatably penetrates out of the upper surface of the bottom limiting block 11. A first gear 19 is sleeved on the upper end of the worm 17. A sleeve plate 110 is provided on the inner wall of the first insertion cavity 12. A transmission shaft 111 is rotatably sleeved on the sleeve plate 110. A second gear 112 meshing with the first gear 19 is provided at the lower end of the transmission shaft 111. When the bottom limiting block 11 is inserted into the first insertion cavity 12, the first gear 19 will mesh with the second gear 112. An installation plate 113 is provided at the lower end of the transmission wire 7. A twist rod 114 is rotatably connected to the lower surface of the installation plate 113. A twist groove adapted to the twist rod 114 is formed on the upper surface of the transmission shaft 111. A first tension spring 115 movably sleeved on the outer surface of the twist rod 114 is provided between the installation plate 113 and the upper surface of the sleeve plate 110. When the first tension spring 115 is not affected by tension, the first tension spring 115 will form a tension on the installation plate 113, so that the initial position of the installation plate 113 is on the side close to the sleeve plate 110. Therefore, the initial position of the twist rod 114 is that most of it extends into the twist groove, and the transmission wire 7 pulls the movable plate 23 to the bottom of the second insertion cavity 21. When the top limiting block 32 extends into the second insertion cavity 21 through the insertion slot 22, the tooth groove 39 on the top limiting block 32 meshes with the third gear 211 and drives the third gear 211 to rotate counterclockwise. At this time, the third gear 211 synchronously meshes and pulls the rack 24 to move upward. At the same time, the movable plate 23 moves synchronously with the rack 24. Therefore, the transmission wire 7 pulls the installation plate 113 to move upward, so that the twist rod 114 moves in the twist groove. Due to the characteristics of the structure of the twist rod 114, it will drive the transmission shaft 111 to rotate. Therefore, the second gear 112 rotates. At this time, the second gear 112 meshes and drives the first gear 19 to rotate, so as to achieve the purpose of controlling the rotation of the worm 17. With the above structure, the bottom locking structure can be automatically controlled after the top arc-shaped block 3 is installed on the side curved wall block 2, without manual control, reducing the efficiency and speed during the assembly of the concrete structural member.

[0023] A contraction cavity 25 is formed at the top of the side curved wall block 2. A limiting plate 26 is arranged in the contraction cavity 25. One side of the limiting plate 26 slides through the insertion groove 22. The side of the limiting plate 26 close to the insertion groove 22 is an isosceles triangle. A built-in plate 27 that slides in the contraction cavity 25 is arranged on the side of the limiting plate 26 in the contraction cavity 25. A first spring 210 that is movably sleeved on the outer surface of the limiting plate 26 is arranged between the built-in plate 27 and the inner wall of the contraction cavity 25. When the first spring 210 is not squeezed, the first spring 210 will exert a thrust on the built-in plate 27, so that the initial position of the limiting plate 26 is retracted into the contraction cavity 25, and thus it will not affect the insertion of the top limiting block 32. A trigger rod 28 whose upper end slides through the contraction cavity 25 is arranged in the second insertion cavity 21. The lower side of the trigger rod 28 can contact the upper surface of the movable plate 23. A first rotating plate 29 is hinged between the upper end of the trigger rod 28 and the built-in plate 27. A limiting groove 310 adapted to the insertion groove 22 is formed on the side of the top limiting block 32 close to the contraction cavity 25. When the top limiting block 32 is inserted into the second insertion cavity 21, it can drive the movable plate 23 to move upward, so that the movable plate 23 can contact the lower end of the trigger rod 28. Since the top limiting block 32 continues to be inserted into the second insertion cavity 21, the movable plate 23 can exert an upward thrust on the trigger rod 28, so that the trigger rod 28 pushes the first rotating plate 29 to move upward. At this time, the first rotating plate 29 will exert a thrust on the built-in plate 27, so that the built-in plate 27 moves toward the side of the insertion groove 22, and at the same time the limiting plate 26 moves into the insertion groove 22. Since the side of the limiting plate 26 close to the insertion groove 22 is an isosceles triangle, the sharp end of the limiting plate 26 is inserted into the limiting groove 310 first, so that the limiting plate 26 will not form a limiting effect on the top limiting block 32 at the beginning, and the top limiting block 32 can move downward by a certain distance. When the bottom of the top limiting block 32 completely extends into the second insertion cavity 21, the right side of the limiting plate 26 is inserted into the limiting groove 310, thereby completing the fixation of the top limiting block 32, and minimizing the problem of loosening of the top limiting block 32, and further ensuring the firm connection between the top arc block 3 and the side curved wall block 2.

[0024] In the present invention, since the lower end of the top limiting block 32 extends out of the lower surface of the top arc-shaped block 3, and the installation position at the top of the tunnel generally fits the top arc-shaped block 3, the protruding top limiting block 32 will affect the installation of the top arc-shaped block 3. Therefore, a contraction structure is provided on the lower side of the arc surface of the top arc-shaped block 3. The contraction structure includes a lifting plate 311. The lifting plate 311 is arranged on the lower side of the arc surface of the top arc-shaped block 3. A lifting groove 36 is formed on the lower surface of the top arc-shaped block 3. The outer surface of the lifting plate 311 fits the inner wall of the lifting groove 36 and slides in the lifting groove 36. A push rod 37 is arranged on the upper surface of the lifting plate 311. A push cavity 35 located above the lifting groove 36 is formed in the top arc-shaped block 3. The upper end of the push rod 37 slides through and penetrates into the push cavity 35. A second spring 38 is arranged between the lifting plate 311 and the top wall of the lifting groove 36 and is movably sleeved on the outer surface of the push rod 37. When the second spring 38 is not affected by tensile force, the second spring 38 will form a tensile force on the lifting plate 311, causing the lifting plate 311 to extend into the lifting groove 36, and its lower surface is flush with the inner arc surface of the top arc-shaped block 3. Transmission lines 7 are also arranged on the left and right side surfaces of the push rod 37 located in the push cavity 35. Two directional wheels 8 are also rotatably connected in the push cavity 35. The transmission line 7 located in the push cavity 35 contacts the lower surface of the directional wheel 8. The other end of the transmission line 7 slides through and penetrates into the movable cavity 31. One end of the transmission line 7 located in the movable cavity 31 is provided with an internal limiting plate 33 that slides in the movable cavity 31. The internal limiting plate 33 is connected to the upper side of the top limiting block 32. A second tension spring 34 is arranged between the internal limiting plate 33 and the bottom wall of the movable cavity 31 and is movably sleeved on the outer surface of the top limiting block 32.

[0025] At the top of the lifting surface of the existing lifting equipment, a docking block adapted to the lifting groove 36 can be provided. Therefore, when the lifting equipment lifts the top arc-shaped block 3, the docking block on the lifting equipment contacts the lifting plate 311. Thus, the docking block will form a thrust on the lifting plate 311, causing the lifting plate 311 to displace upward in the lifting groove 36. At the same time, the push rod 37 displaces upward and the second spring 38 is stressed and contracts. During the upward displacement of the push rod 37, a tensile force will be formed on the transmission line 7. Therefore, the transmission line 7 will form a tensile force on the top limiting block 32, causing the top limiting block 32 to contract into the movable cavity 31. Therefore, when the lifting equipment lifts the top arc-shaped block 3, the top limiting block 32 can contract into the movable cavity 31. Therefore, when the top arc-shaped block 3 is installed on the side curved wall block 2, the top limiting block 32 will not affect the installation of the top arc-shaped block 3, ensuring the installation efficiency of the top arc-shaped block 3. At the same time, when the lifting equipment lifts the top arc-shaped block 3, since the docking block extends into the lifting groove 36, a limiting effect can be formed on the top arc-shaped block 3, minimizing the problem of the top arc-shaped block 3 moving during the lifting process and also ensuring the accuracy during the installation of the top arc-shaped block 3.

[0026] Control cavities 61 are provided in the middle sections of both side curved wall blocks 2. At the same time, two control cavities 61 are also provided in the top arc-shaped block 3. The transmission line 7 slides through the control cavity 61. An active anti-seepage structure 6 controlled by the transmission line 7 is provided in the control cavity 61 of the side curved wall block 2 and the top arc-shaped block 3. Since the active anti-seepage structures 6 are completely the same, the following mainly describes the active anti-seepage structure 6 on the side curved wall block 2. The active anti-seepage structure 6 includes two control rods 62 arranged in parallel. Both control rods 62 are rotatably connected between the front and rear inner walls of the control cavity 61. Two transmission wheels 63 are sleeved on the outer surfaces of the two control rods 62. The section of the transmission line 7 located in the control cavity 61 is arranged in an S shape and is respectively connected to the outer surfaces of the two transmission wheels 63 in a transmission manner. In this way, when the transmission line 7 pulls the structure to displace, the transmission line 7 can drive the two transmission wheels 63 to rotate in opposite directions respectively.

[0027] At the same time, a friction layer can be provided on the outer surface of the transmission wheel 63 and the outer surface of the section of the transmission line 7 located in the control cavity 61. In this way, the friction between the transmission wheel 63 and the transmission line 7 is increased, and the problem that the transmission line 7 cannot drive the transmission wheel 63 to rotate is avoided as much as possible.

[0028] The front surfaces of the side curved wall blocks 2 and the top arc blocks 3 are both provided with movable anti-seepage grooves 66, and the rear surfaces of the side curved wall blocks 2 and the top arc blocks 3 are both provided with storage grooves 64. A movable anti-seepage block 65 adapted to the movable anti-seepage groove 66 is slidably connected in the storage groove 64. At the same time, the outer surface of the movable anti-seepage block 65 also fits with the inner wall of the storage groove 64. The rear ends of the two control rods 62 both rotatably penetrate into the storage groove 64. Two swing plates 67 are arranged at the rear ends of the two control rods 62. Two fixing plates 68 arranged parallel up and down are arranged on the front inner wall of the storage groove 64, and the two swing plates 67 are both located between the two fixing plates 68. A connecting slide rod 69 is arranged between the two fixing plates 68. Two connecting sliding sleeves 610 are slidably sleeved on the outer surface of the connecting slide rod 69. Two second rotating plates 611 are hinged between the two connecting sliding sleeves 610 and the movable anti-seepage block 65. Two transverse sliding plates 613 are arranged on the front sides of the two connecting sliding sleeves 610. An activity column 612 is arranged on the side of the swing plate 67 away from the control rod 62. A limiting sliding groove 614 is opened on the surface of the transverse sliding plate 613 facing the activity column 612. The vertical cross-section of the limiting sliding groove 614 is a combined shape of a circle and a square. One end of the activity column 612 away from the swing plate 67 extends into the limiting sliding groove 614. A sliding ball 615 that slides in the circular groove of the limiting sliding groove 614 is arranged at one end of the activity column 612 located in the limiting sliding groove 614. Therefore, when the two transmission wheels 63 rotate in opposite directions, the two control rods 62 rotate synchronously with the two transmission wheels 63, so as to drive the two swing plates 67 to rotate. At this time, the activity column 612 will form a thrust on the transverse sliding plate 613, and the two connecting sliding sleeves 610 displace in opposite directions or in opposite directions on the connecting slide rod 69. At the same time, when the transmission line 7 displaces the control structure, the two transmission wheels 63 can be driven to rotate 180 degrees, so that the distance between the two connecting sliding sleeves 610 is the shortest or the longest. When the two connecting sliding sleeves 610 displace in opposite directions, the second rotating plate 611 will form a thrust on the movable anti-seepage block 65, so that the movable anti-seepage block 65 displaces out of the storage groove 64 and displaces into the movable anti-seepage groove 66 of the installed concrete structural member. By adopting the above structure, after the concrete structural member is assembled and installed, the displacement of the movable anti-seepage block 65 can be automatically controlled, which increases the connection tightness and the seepage path between adjacent concrete structural members, and further improves the anti-seepage effect after the installation of the concrete structural member.

[0029] In this solution, the initial position of the movable anti-seepage block 65 on the top arc block 3 is to extend out of the top arc block 3. Therefore, when the transmission line 7 pulls the top limiting block 32 to contract, the movable anti-seepage block 65 also contracts into the storage groove 64.

[0030] The working principle of the auxiliary device for the 3D printing high-strength and tough fiber concrete material structural member provided by the present invention is as follows: Step 1: Install the bottom invert block 1 on the ground of the tunnel by a forklift, and set expansion bolts for fixation between the ground and the bottom invert block 1. Then, sequentially install the two side curved wall blocks 2 on the bottom invert block 1. During the installation of the side curved wall block 2, the bottom limiting block 11 is inserted into the first insertion cavity 12 through the communication groove, and the first gear 19 meshes with the second gear 112; Step 2: Finally, install the top arc block 3 on the two side curved wall blocks 2 by a lifting device. When the lifting device lifts the top arc block 3, the docking block on the lifting device contacts the lifting plate 311. Thus, the docking block will exert a thrust on the lifting plate 311, causing the lifting plate 311 to displace upward in the lifting groove 36. At the same time, the push rod 37 displaces upward and the second spring 38 is stressed and contracts. During the upward displacement of the push rod 37, a pulling force is exerted on the transmission line 7. Therefore, the transmission line 7 exerts a pulling force on the top limiting block 32, causing the top limiting block 32 to contract into the movable cavity 31; Step 3: After the installation of the top arc block 3 is completed, the lifting device controls the lifting surface to move downward. At this time, the docking block displaces out of the lifting groove 36. Thus, the lifting plate 311 is displaced to the initial position under the push of the second spring 38 (if the lifting plate 311 does not move downward, it means that the installation position of the top arc block 3 is incorrect. Therefore, the position of the top arc block 3 needs to be adjusted by the lifting device). At this time, the push rod 37 no longer pulls the transmission line 7. Therefore, the second tension spring 34 pulls the lower end of the top limiting block 32 to extend into the second insertion cavity 21 through the insertion groove 22. During the insertion process, the tooth groove 39 on the top limiting block 32 meshes with the third gear 211 and drives the third gear 211 to rotate counterclockwise. At this time, the third gear 211 synchronously meshes and pulls the rack 24 to displace upward. At the same time, the movable plate 23 displaces synchronously with the rack 24. Therefore, the transmission line 7 pulls the mounting plate 113 to displace upward, and thus the twist rod 114 displaces in the twist groove. Due to the characteristics of the structure of the twist rod 114, it will drive the transmission shaft 111 to rotate. Therefore, the second gear 112 rotates. At this time, the second gear 112 meshes and drives the first gear 19 to rotate, causing the worm 17 to rotate synchronously. The spiral teeth on the two worms 17 are arranged in opposite directions. Therefore, when the two worms 17 rotate in the same direction, the two rotating disks 14 can be driven to rotate in opposite directions, so that the side of the pressing plate 15 away from the rotating disk 14 contacts the bottom of the first insertion cavity 12, thereby applying a downward pressure to the bottom of the side curved wall block 2; Fourth step: The movable plate 23 moves upward, so that the movable plate 23 can contact the lower end of the trigger rod 28. Since the top limiting block 32 continues to be inserted into the second insertion cavity 21, the movable plate 23 can apply an upward thrust to the trigger rod 28, causing the trigger rod 28 to push the first rotating plate 29 upward. At this time, the first rotating plate 29 will form a thrust on the built-in plate 27, causing the built-in plate 27 to move toward one side of the insertion groove 22. At the same time, the limiting plate 26 moves into the insertion groove 22. Since the side of the limiting plate 26 close to the insertion groove 22 is an isosceles triangle, the sharp end of the limiting plate 26 first inserts into the limiting groove 310. In this way, the limiting plate 26 does not form a limiting effect on the top limiting block 32 at the beginning, allowing the top limiting block 32 to move downward a certain distance. When the bottom of the top limiting block 32 completely extends into the second insertion cavity 21, the right side of the limiting plate 26 inserts into the limiting groove 310, thus completing the fixation of the top limiting block 32; Fifth step: When the transmission line 7 pulls the mounting plate 113 upward and the top limiting block 32 pulls another transmission line 7, the two transmission wheels 63 rotate in opposite directions, and the two control rods 62 rotate synchronously with the two transmission wheels 63, thereby driving the two swing plates 67 to rotate. At this time, the movable column 612 will form a thrust on the transverse slide plate 613, causing the two connecting sliding sleeves 610 to move in opposite directions. The second rotating plate 611 will form a thrust on the movable anti-seepage block 65, causing the movable anti-seepage block 65 to move out of the storage groove 64 and move into the movable anti-seepage groove 66 of the installed concrete structural member.

Claims

1. An auxiliary device for 3D printing a high-strength fiber concrete material structural member, comprising a bottom inverted arch block (1), two side curved wall blocks (2) and a top curved block (3), characterized in that: The bottom limiting blocks (11) are arranged on two planes on the upper side of the bottom inverted arch block (1), the left and right sides of the top arc-shaped block (3) are provided with movable cavities (31), the bottom of the side curved wall block (2) is provided with a first insertion cavity (12), the lower surface of the side curved wall block (2) is provided with a connecting groove connected to the first insertion cavity (12), the bottom limiting block (11) is inserted into the first insertion cavity (12) through the connecting groove, the bottom limiting block (11) is provided with a locking structure, a movable top limiting block (32) is provided in the movable cavity (31), and the top The lower side of the limiting block (32) slides through the lower plane of the top arc block (3); a second insertion cavity (21) is provided at the top of the side curved wall block (2); an insertion groove (22) communicating with the second insertion cavity (21) is provided on the upper surface of the side curved wall block (2); the lower side of the top limiting block (32) extends into the second insertion cavity (21) through the insertion groove (22); a transmission structure for controlling the operation of the locking structure is provided in the second insertion cavity (21); and a contraction structure for controlling the contraction of the top limiting block (32) is provided on the lower side of the arc surface of the top arc block (3).

2. The auxiliary device for 3D printing high-strength and tough fiber concrete material structural parts according to claim 1, characterized in that: A fixed anti-seepage block (5) is arranged on the rear side surface of the bottom inverted arch block (1), and a fixed anti-seepage groove (4) adapted to the fixed anti-seepage block (5) is opened on the front side surface of the bottom inverted arch block (1).

3. The auxiliary device for 3D printing high-strength and tough fiber concrete material structural parts according to claim 2, characterized in that: The locking structure comprises two rotating disks (14), the two rotating disks (14) being respectively arranged on the left and right sides of the upper side of the bottom limiting block (11), the left and right sides of the upper side of the bottom limiting block (11) being provided with rotating grooves (13), the rotating disks (14) rotating in the rotating grooves (13), the bottom limiting block (11) being provided with two transmission chambers (16) respectively connected to the two rotating grooves (13), the bottom wall of the transmission chamber (16) being rotatably connected to a worm (17), the outer surface of the rotating disk (14) being provided with a plurality of circumferentially The worm gear teeth (18) are arranged in an array, and the worm gear teeth (18) extend into the transmission cavity (16) through the rotating groove (13) and mesh with the worm (17). The spiral teeth on the two worms (17) are arranged in opposite directions. The outer surface of the rotating disk (14) is provided with a tightening plate (15), and the tightening plate (15) extends out of the bottom limiting block (11) through the rotating groove (13). After the rotating disk (14) rotates nearly ninety degrees, the side of the tightening plate (15) away from the rotating disk (14) contacts the bottom of the first insertion cavity (12).

4. The auxiliary device for 3D printing high-strength and tough fiber concrete material structural parts according to claim 3, characterized in that: The transmission structure comprises a third gear (211), the third gear (211) is rotatably connected in the second insertion cavity (21), the right side of the third gear (211) is meshedly connected with a rack (24), a movable plate (23) is arranged on the lower side of the rack (24), a top limiting block (32) is provided with a tooth groove (39) extending from its lower surface on the side facing the third gear (211), a transmission line (7) is arranged on the lower side of the movable plate (23), the lower end of the transmission line (7) slides through the first insertion cavity (12), a directional wheel (8) is rotatably connected in the first insertion cavity (12), the outer surface of one end of the transmission line (7) located in the first insertion cavity (12) is laid on the outer surface of the directional wheel (8), the upper end of the worm (17) rotates through the bottom The upper surface of the limiting block (11) and the upper end of the worm (17) are sleeved with a first gear (19); a sleeve plate (110) is provided on the inner wall of the first insertion cavity (12); a transmission shaft (111) is rotatably sleeved on the sleeve plate (110); a second gear (112) meshing with the first gear (19) is provided at the lower end of the transmission shaft (111); a mounting plate (113) is provided at the lower end of the transmission line (7); a twisted rod (114) is rotatably connected to the lower surface of the mounting plate (113); a twisted groove matching the twisted rod (114) is provided on the upper surface of the transmission shaft (111); and a first tension spring (115) movably sleeved on the outer surface of the twisted rod (114) is provided between the mounting plate (113) and the upper surface of the sleeve plate (110).

5. The auxiliary device for 3D printing high-strength and tough fiber concrete material structural parts according to claim 4, characterized in that: The top of the side curved wall block (2) is provided with a contraction cavity (25), and a limiting plate (26) is arranged in the contraction cavity (25). One side of the limiting plate (26) slides into the insertion groove (22), and the side of the limiting plate (26) close to the insertion groove (22) is an isosceles triangle. The side of the limiting plate (26) located in the contraction cavity (25) is provided with an internal plate (27) that slides in the contraction cavity (25), and a movable sleeve is arranged between the internal plate (27) and the inner wall of the contraction cavity (25). A first spring (210) is disposed on the outer surface of the limiting plate (26); a trigger rod (28) is disposed in the second insertion cavity (21) and the upper end of the trigger rod (28) is slidably inserted into the contraction cavity (25); the lower side of the trigger rod (28) can contact the upper surface of the movable plate (23); a first rotating plate (29) is hinged between the upper end of the trigger rod (28) and the built-in plate (27); and a limiting groove (310) adapted to the insertion groove (22) is provided on one side of the top limiting block (32) close to the contraction cavity (25).

6. The auxiliary device for 3D printing high-strength and tough fiber concrete material structural parts according to claim 5, characterized in that: The retracting structure comprises a lifting plate (311), the lifting plate (311) being arranged on the lower side of the arc surface of the top arc block (3), the lower surface of the top arc block (3) being provided with a lifting groove (36), the outer surface of the lifting plate (311) being in contact with the inner wall of the lifting groove (36) and sliding in the lifting groove (36), the upper surface of the lifting plate (311) being provided with a pushing rod (37), the top arc block (3) being provided with a pushing cavity (35) located on the upper side of the lifting groove (36), the upper end of the pushing rod (37) slidingly passing through the pushing cavity (35), a second spring (38) being movably sleeved on the outer surface of the pushing rod (37) being provided between the lifting plate (311) and the top wall of the lifting groove (36), the pushing rod (37) being provided with a pushing cavity (35) located on the upper side of the lifting groove (36), The left and right surfaces of the rod (37) located in the push chamber (35) are also provided with transmission lines (7). The push chamber (35) is also rotatably connected with two directional wheels (8). The transmission line (7) located in the push chamber (35) contacts the lower surface of the directional wheels (8). The other end of the transmission line (7) slides through the movable chamber (31). One end of the transmission line (7) located in the movable chamber (31) is provided with a built-in limiting plate (33) that slides in the movable chamber (31). The built-in limiting plate (33) is connected to the upper side of the top limiting block (32). A second tension spring (34) that is movably sleeved on the outer surface of the top limiting block (32) is provided between the built-in limiting plate (33) and the bottom wall of the movable chamber (31).

7. The auxiliary device for 3D printing high-strength and tough fiber concrete material structural parts according to claim 6, characterized in that: The middle sections of the two side curved wall blocks (2) are each provided with a control cavity (61), and the top arc block (3) also has two control cavities (61). The transmission line (7) slides through the control cavity (61). The control cavities (61) on the side curved wall blocks (2) and the top arc block (3) are each provided with a movable anti-seepage structure (6) controlled by the transmission line (7). The movable anti-seepage structure (6) comprises two parallel control rods (62). The two control rods (62) are both rotatably connected between the front and rear inner walls of the control cavity (61). The outer surfaces of the two control rods (62) are sleeved with two transmission wheels (63). The transmission line (7) is located in a section of the control cavity (61) and is arranged to be bent in an S shape, and is respectively transmission-connected to the outer surfaces of the two transmission wheels (63).

8. The auxiliary device for 3D printing high-strength and toughness fiber concrete material structural parts according to claim 7, characterized in that: The front surfaces of the side curved wall blocks (2) and the top arc-shaped blocks (3) are provided with movable anti-seepage grooves (66), and the rear surfaces of the side curved wall blocks (2) and the top arc-shaped blocks (3) are provided with storage grooves (64). A movable anti-seepage block (65) adapted to the movable anti-seepage groove (66) is slidably connected in the storage groove (64). The outer surface of the movable anti-seepage block (65) is also in contact with the inner wall of the storage groove (64). The rear ends of the two control rods (62) are rotated to penetrate into the storage groove (64). The rear ends of the two control rods (62) are provided with two swing plates (67). Two fixed plates (68) arranged in parallel up and down are provided on the front inner wall of the storage groove (64). The two swing plates (67) are located between the two fixed plates (68). A connecting slide rod (69) is provided between the two fixed plates (68). The outer surface sliding sleeve of the sliding rod (69) is provided with two connecting sliding sleeves (610), and two second rotating plates (611) are hinged between the two connecting sliding sleeves (610) and the movable anti-seepage block (65). Two transverse sliding plates (613) are provided on the front sides of the two connecting sliding sleeves (610). A movable column (612) is provided on the side of the swing plate (67) away from the control rod (62). A limiting sliding groove (614) is provided on the surface of the transverse sliding plate (613) facing the movable column (612). The vertical cross-section of the limiting sliding groove (614) is a combination of a circle and a square. One end of the movable column (612) away from the swing plate (67) extends into the limiting sliding groove (614), and one end of the movable column (612) located in the limiting sliding groove (614) is provided with a sliding ball (615) sliding in the circular groove of the limiting sliding groove (614).

9. The auxiliary device for 3D printing high-strength and tough fiber concrete material structural parts according to claim 8, characterized in that: A friction layer may be provided on the outer surface of the transmission wheel (63) and a section of the outer surface of the transmission line (7) located in the control chamber (61).

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