A precast beam end mold installation precision calibration device

Abstract

This utility model belongs to the field of precast concrete component production technology, and in particular, it is a device for calibrating the installation accuracy of precast beam end molds. It includes two transverse reference rods and two longitudinal reference rods used for calibrating the installation of precast beam end molds. An adjustment mechanism is provided between the transverse and longitudinal reference rods, and several mounting seats are detachably mounted on the longitudinal reference rods. This utility model has a reasonable structural design. The two adjustable transverse and two longitudinal reference rods provide a stable measurement benchmark, and with the help of a scale and fine-tuning bolts, high-precision quantitative adjustment is achieved. The addition of a laser line projector further improves the accuracy of verticality calibration. The convenient assembly and disassembly mechanism, screws, and loosening nuts allow for quick assembly and adjustment, greatly shortening the calibration time. Furthermore, the spacing between the two transverse and two longitudinal reference rods is adjustable, demonstrating the device's versatility.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete component production technology, and in particular to a device for calibrating the installation accuracy of precast beam end molds. Background Technology

[0002] In the precast beam production process, the end mold is a key mold for forming the beam ends. Its installation accuracy directly determines the flatness of the precast beam end face, the deviation of the end dimensions, and the compatibility with subsequent components (such as adjacent precast beams and supports). If the end mold is installed off-center, it can easily lead to exposed reinforcement at the beam ends, out-of-tolerance dimensions, and even affect the overall load-bearing performance of the bridge.

[0003] Existing end formwork calibration methods mostly rely on manual operation. Workers measure the distance between the end formwork and the pedestal baseline with a tape measure and use a level or plumb bob to check the verticality of the end formwork. The calibration process requires repeated adjustments and multiple measurements, resulting in low efficiency and long time consumption. Moreover, the measurement results are easily affected by human factors, making it difficult to guarantee the overall flatness, verticality, and relative position accuracy of the end formwork. Therefore, we propose a precast beam end formwork installation accuracy calibration device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings mentioned above by proposing a device for calibrating the installation accuracy of precast beam end molds.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A device for calibrating the installation accuracy of precast beam end formwork includes two transverse reference rods and two longitudinal reference rods for calibrating the installation of precast beam end formwork. An adjustment mechanism is provided between the transverse and longitudinal reference rods. Several mounting seats are detachably provided on the longitudinal reference rods. A calibration mechanism is provided on the top of the mounting seats. A convenient disassembly and assembly mechanism is provided between the mounting seats and the longitudinal reference rods. The calibration mechanism includes a scale rod, a fine-tuning bolt, and a contact head for abutting the end formwork.

[0006] In a preferred embodiment of this invention, the adjusting mechanism has a sliding hole at the top of the transverse reference rod and an upper sliding hole at the top of the two longitudinal reference rods. A screw is movably fitted at the intersection of the sliding hole and the upper sliding hole. An anti-loosening nut is threaded on the outer side of the screw and the anti-loosening nut is movably abutting against the bottom of the transverse reference rod.

[0007] As a preferred embodiment of this utility model, an anti-slip pad is movably fitted on the outer side of the screw, and the anti-slip pad movably abuts against the anti-loosening nut and the transverse reference rod.

[0008] As a preferred embodiment of this utility model, the convenient disassembly and assembly mechanism includes two card seats and a bidirectional lead screw rotatably connected to the inner walls of both sides of the mounting base, as well as two elastic claws fixedly connected to the bottom of the mounting base. The two card seats are respectively fixedly connected to both sides of the longitudinal reference rod, and the two elastic claws are respectively movably engaged with the outer side of the corresponding card seats. The outer side of the bidirectional lead screw is threaded with two drive plates, and the bottom of each drive plate is fixedly connected with a connecting arm. Both sides of each connecting arm are fixedly connected with a pressing block, and the two pressing blocks are respectively movably abutting against the outer side of the corresponding elastic claw.

[0009] As a preferred embodiment of this invention, a handwheel is fixedly connected to one end of the bidirectional lead screw.

[0010] As a preferred embodiment of this invention, the calibration mechanism further includes a fixed frame movably placed on top of the mounting base. Two screws are threaded onto the bottom inner wall of the fixed frame, and the fixed frame is fixedly connected to the top of the mounting base by the two screws. The fine-tuning bolt is threaded onto one side of the fixed frame, the contact head is fixedly connected to one end of the fine-tuning bolt, and the scale rod is fixedly connected to the inner wall of one side of the fixed frame.

[0011] As a preferred embodiment of this invention, a lower scale is fixedly connected to the outer side of the transverse reference rod, and an upper scale is fixedly connected to one side of the longitudinal reference rod.

[0012] As a preferred embodiment of this invention, the device further includes a laser line projector for measuring verticality, wherein a suction cup is fixedly connected to the bottom of the laser line projector, and the suction cup can be adsorbed and fixedly installed on the horizontal reference rod or the vertical reference rod.

[0013] In this utility model, a precast beam end mold installation accuracy calibration device is described. Two transverse reference rods and two longitudinal reference rods are assembled into a rectangular frame. Based on the dimensions of the end mold to be calibrated, the anti-loosening nuts are loosened so that they do not firmly abut against the bottom of the transverse reference rods, thus not limiting or fixing the transverse and longitudinal reference rods. At this point, the spacing between the two transverse reference rods and the two longitudinal reference rods can be adjusted along the guide holes of the upper and lower sliding holes, so that the rectangular frame formed is approximately aligned with the outer contour of the end mold. Then, all locking anti-loosening nuts are tightened to firmly abut against the transverse reference rods. To the bottom of the reference rod, anti-slip pads are used to increase friction and make it more secure. According to the key control points on the end mold design drawings, the corresponding calibration mechanism is installed at the corresponding position on the longitudinal reference rod through a convenient disassembly and assembly mechanism. During installation, according to the indication of the upper scale, the two elastic claws under the mounting base can be accurately engaged with the corresponding brackets, thereby achieving the purpose of precise positioning of the mounting base. Finally, by rotating the double-acting screw through the handwheel, the double-acting screw drives the two drive plates, connecting arms and extrusion blocks to move closer to each other and firmly abut against the outer side of the elastic claws, thereby stably fixing the mounting base. In this utility model, a precast beam end mold installation accuracy calibration device is described. Using the top surface of the transverse reference rod as a reference, a scale rod is used to measure the exposed length of the fine-tuning bolt, ensuring all contact points are in the same plane. If there is a deviation, the end mold is pushed by rotating the fine-tuning bolt until the readings of all points are consistent, thus achieving the calibration purpose. A laser projector is attached to the transverse reference rod via a suction cup, projecting a vertical laser line. It is observed whether the laser line coincides with the edge of the end mold or a specific marking line. If there is a deviation, it is corrected by adjusting the support components at the bottom or side of the end mold. Simultaneously, the scales of the upper and lower scales are used to accurately measure the position of embedded parts, reserved holes, etc., on the end mold relative to the beam centerline or edge, ensuring they meet design requirements. After completing all calibration work, the handwheel is rotated in the opposite direction, causing the two pressing blocks to move away from each other and not press against the elastic claw. Pulling the elastic claw outward allows the mounting base and calibration mechanism to be removed from the longitudinal reference rod. Then, the anti-loosening nut is loosened, and the entire device is removed from the end mold. This utility model has a reasonable structural design. With two adjustable horizontal reference rods and two adjustable vertical reference rods, it can provide a stable measurement reference. With the help of scale and fine adjustment bolts, it can achieve high-precision quantitative adjustment. The addition of laser line projector further improves the accuracy of verticality calibration. The convenient assembly and disassembly mechanism, screw and loosening nut settings make the device quick to assemble and adjust, which greatly shortens the calibration time. Moreover, the distance between the two horizontal reference rods and the two vertical reference rods is adjustable, which enhances the versatility of the device. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of a precast beam end mold installation accuracy calibration device proposed in this utility model; Figure 2 This is a cross-sectional view of the adjustment mechanism of a precast beam end mold installation accuracy calibration device proposed in this utility model. Figure 3 This is a cross-sectional view of the mounting base of a precast beam end mold installation accuracy calibration device proposed in this utility model; Figure 4 for Figure 3 A schematic diagram of the structure of part A.

[0015] In the diagram: 1. Horizontal reference rod; 2. Longitudinal reference rod; 3. Adjustment mechanism; 4. Upper scale; 5. Lower scale; 6. Mounting base; 7. Convenient disassembly and assembly mechanism; 8. Calibration mechanism; 9. Suction cup; 10. Laser projector; 31. Sliding hole; 32. Upper sliding hole; 33. Screw; 34. Anti-loosening nut; 35. Anti-slip pad; 71. Two-way lead screw; 72. Handwheel; 73. Drive plate; 74. Connecting arm; 75. Extrusion block; 76. Elastic claw; 77. Card seat; 81. Fixing bracket; 82. Screw; 83. Scale rod; 84. Fine adjustment bolt; 85. Contact head. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figures 1-4 A device for calibrating the installation accuracy of precast beam end formwork includes two transverse reference rods 1 and two longitudinal reference rods 2 used for calibrating the installation of precast beam end formwork. An adjustment mechanism 3 is provided between the transverse reference rods 1 and the longitudinal reference rods 2. Several mounting seats 6 are detachably provided on the longitudinal reference rods 2. A calibration mechanism 8 is provided on the top of the mounting seat 6. A convenient disassembly and assembly mechanism 7 is provided between the mounting seat 6 and the longitudinal reference rods 2. The calibration mechanism 8 includes a scale rod 83, a fine-tuning bolt 84, and a contact head 85 for abutting the end formwork.

[0018] Furthermore, refer to Figure 1 and Figure 2 The adjusting mechanism 3 has a sliding hole 31 at the top of the transverse reference rod 1 and an upper sliding hole 32 at the top of the two longitudinal reference rods 2. A screw 33 is movably fitted at the intersection of the sliding hole 31 and the upper sliding hole 32. An anti-loosening nut 34 is threaded on the outside of the screw 33. The anti-loosening nut 34 is movably abutted against the bottom of the transverse reference rod 1. An anti-slip washer 35 is movably fitted on the outside of the screw 33. The anti-slip washer 35 is movably abutted against the anti-loosening nut 34 and the transverse reference rod 1.

[0019] The above scheme is adopted as follows: two transverse reference rods 1 and two longitudinal reference rods 2 are assembled into a rectangular frame. According to the size of the end mold to be calibrated, the anti-loosening nuts 34 are loosened so that the anti-loosening nuts 34 do not firmly abut against the bottom of the transverse reference rods 1, and thus do not limit or fix the transverse reference rods 1 and the two longitudinal reference rods 2. At this time, along the guide of the upper sliding hole 32 and the lower sliding hole 31, the distance between the two transverse reference rods 1 and the distance between the two longitudinal reference rods 2 can be adjusted so that the rectangular frame formed by them is roughly aligned with the outer edge contour of the end mold. Then, all the locking anti-loosening nuts 34 are tightened so that they firmly abut against the bottom of the transverse reference rods 1. The anti-slip pads 35 are set to increase the friction and make the fixation more secure.

[0020] Furthermore, refer to Figures 1-4 The convenient disassembly and assembly mechanism 7 includes two card seats 77 and a bidirectional lead screw 71 rotatably connected to the inner walls of both sides of the mounting base 6, as well as two elastic claws 76 fixedly connected to the bottom of the mounting base 6. The two card seats 77 are respectively fixedly connected to both sides of the longitudinal reference rod 2, and the two elastic claws 76 are respectively movably engaged with the outer side of the corresponding card seat 77. The outer side of the bidirectional lead screw 71 is threaded with two drive plates 73, and the bottom of each drive plate 73 is fixedly connected with a connecting arm 74. Both sides of each connecting arm 74 are fixedly connected with a pressing block 75, and the two pressing blocks 75 are respectively movably abutting against the outer side of the corresponding elastic claw 76.

[0021] Using the above scheme: During installation, according to the indication of the upper scale 4, the two elastic claws 76 under the mounting base 6 can be accurately engaged with the corresponding claws 77, thereby achieving the purpose of accurately positioning the mounting base 6. Finally, by rotating the double-acting screw 71 through the handwheel 72, the double-acting screw 71 drives the two drive plates 73, the connecting arm 74 and the pressing block 75 to move closer to each other and firmly abut against the outside of the elastic claws 76, thereby stably fixing the mounting base 6 securely.

[0022] Furthermore, a handwheel 72 is fixedly connected to one end of the bidirectional lead screw 71 to facilitate rotation of the bidirectional lead screw 71.

[0023] Furthermore, refer to Figures 1-4 The calibration mechanism 8 also includes a mounting bracket 81 that is movably placed on top of the mounting base 6. Two screws 82 are threadedly connected to the bottom inner wall of the mounting bracket 81. The mounting bracket 81 is fixedly connected to the top of the mounting base 6 by the two screws 82. A fine-tuning bolt 84 is threadedly connected to one side of the mounting bracket 81. A contact head 85 is fixedly connected to one end of the fine-tuning bolt 84. A scale rod 83 is fixedly connected to the inner wall of one side of the mounting bracket 81.

[0024] The above scheme is adopted: taking the top surface of the transverse reference rod 1 as the reference, the exposed length of the fine adjustment bolt 84 is measured using the scale rod 83 to ensure that all contact points are in the same plane. If there is a deviation, the end mold is pushed by rotating the fine adjustment bolt 84 until the readings of all points are consistent, thereby achieving the purpose of calibration.

[0025] Furthermore, a lower scale 5 is fixedly connected to the outer side of the transverse reference rod 1, and an upper scale 4 is fixedly connected to one side of the longitudinal reference rod 2. By using the scales of the upper and lower scales, the position of the embedded parts and reserved holes on the end mold relative to the center line or edge of the beam can be accurately measured to ensure that they meet the design requirements.

[0026] Furthermore, the device also includes a laser line projector 10 for measuring verticality. The bottom of the laser line projector 10 is fixedly connected to a suction cup 9, which can be adsorbed and fixedly installed on the horizontal reference rod 1 or the vertical reference rod 2. The laser line projector 10 is adsorbed onto the horizontal reference rod 1 through the suction cup 9, so that it projects a vertical laser line. It is observed whether the laser line coincides with the edge of the end mold or a specific marking line. If there is a deviation, it is corrected by adjusting the support components at the bottom or side of the end mold.

[0027] In this invention, during use, two transverse reference rods 1 and two longitudinal reference rods 2 are assembled into a rectangular frame. Based on the dimensions of the end mold to be calibrated, the anti-loosening nuts 34 are loosened so that they do not firmly abut against the bottom of the transverse reference rods 1, thus not limiting or fixing the transverse reference rods 1 and the two longitudinal reference rods 2. At this point, following the guide of the upper sliding hole 32 and the lower sliding hole 31, the distance between the two transverse reference rods 1 and the distance between the two longitudinal reference rods 2 can be adjusted so that the rectangular frame formed is roughly aligned with the outer contour of the end mold. Then, all the locking anti-loosening nuts 34 are tightened so that they firmly abut against the bottom of the transverse reference rods 1, preventing slippage. The setting of the gasket 35 increases the friction and makes it more secure. According to the key control points on the end mold design drawings, the corresponding calibration mechanism 8 is installed at the corresponding position on the longitudinal reference rod 2 through the convenient disassembly and assembly mechanism 7. During installation, according to the indication of the upper scale 4, the two elastic claws 76 under the mounting seat 6 can be accurately engaged with the corresponding claws 77, thereby achieving the purpose of precise positioning of the mounting seat 6. Finally, by rotating the double-acting screw 71 through the handwheel 72, the double-acting screw 71 drives the two drive plates 73, the connecting arm 74 and the extrusion block 75 to move closer to each other and firmly abut against the outside of the elastic claws 76, thereby stably fixing the mounting seat 6.

[0028] Using the top surface of the transverse reference rod 1 as a reference, the exposed length of the fine-tuning bolt 84 is measured using the scale rod 83 to ensure that all contact points are in the same plane. If there is a deviation, the end mold is pushed by rotating the fine-tuning bolt 84 until the readings of all points are consistent, thereby achieving the purpose of calibration. The laser projector 10 is attached to the transverse reference rod 1 by the suction cup 9, so that it projects a vertical laser line. Observe whether the laser line coincides with the edge of the end mold or a specific marking line. If there is a deviation, it is corrected by adjusting the support of the bottom or side of the end mold. At the same time, the scale of the upper and lower scales can be used to accurately measure the position of the embedded parts, reserved holes, etc. on the end mold relative to the center line or edge of the beam, ensuring that they meet the design requirements. After completing all calibration work, the handwheel 72 is rotated in the opposite direction so that the two pressing blocks 75 move away from each other and do not press the elastic claw 76. Pull the elastic claw 76 outward to remove the mounting base 6 and calibration mechanism 8 from the longitudinal reference rod 2. Then loosen the anti-loosening nut 34 and remove the entire device from the end mold.

Claims

1. A precast beam end form installation accuracy calibration device, characterized by, The system includes two transverse reference rods (1) and two longitudinal reference rods (2) used for the installation and calibration of the precast beam end formwork. An adjustment mechanism (3) is provided between the transverse reference rods (1) and the longitudinal reference rods (2). Several mounting seats (6) are detachably provided on the longitudinal reference rods (2). A calibration mechanism (8) is provided on the top of the mounting seat (6). A convenient disassembly and assembly mechanism (7) is provided between the mounting seat (6) and the longitudinal reference rods (2). The calibration mechanism (8) includes a scale rod (83), a fine-tuning bolt (84), and a contact head (85) for abutting the end formwork.

2. The precast beam end formwork installation accuracy calibration device according to claim 1, characterized in that, The adjustment mechanism (3) has a sliding hole (31) at the top of the transverse reference rod (1) and an upper sliding hole (32) at the top of the two longitudinal reference rods (2). A screw (33) is movably fitted at the intersection of the sliding hole (31) and the upper sliding hole (32). A lock nut (34) is threaded on the outer side of the screw (33). The lock nut (34) movably abuts against the bottom of the transverse reference rod (1).

3. The precast beam end formwork installation accuracy calibration device according to claim 2, characterized in that, The screw (33) is movably fitted with an anti-slip pad (35) on its outer side, and the anti-slip pad (35) is movably abutted between the anti-loosening nut (34) and the transverse reference rod (1).

4. The precast beam end formwork installation accuracy calibration device according to claim 1, characterized in that, The convenient disassembly and assembly mechanism (7) includes two card seats (77) and a bidirectional screw rod (71) rotatably connected to the inner walls of both sides of the mounting base (6), and two elastic claws (76) fixedly connected to the bottom of the mounting base (6). The two card seats (77) are respectively fixedly connected to both sides of the longitudinal reference rod (2), and the two elastic claws (76) are respectively movably engaged with the outer side of the corresponding card seat (77). The outer side of the bidirectional screw rod (71) is threaded with two drive plates (73). The bottom of the two drive plates (73) is fixedly connected with a connecting arm (74). The two sides of the two connecting arms (74) are fixedly connected with a pressing block (75). The two pressing blocks (75) are respectively movably abutting against the outer side of the corresponding elastic claw (76).

5. The precast beam end formwork installation accuracy calibration device according to claim 4, characterized in that, A handwheel (72) is fixedly connected to one end of the bidirectional lead screw (71).

6. The precast beam end formwork installation accuracy calibration device according to claim 1, characterized in that, The calibration mechanism (8) also includes a fixed frame (81) that is movably placed on top of the mounting base (6). Two screws (82) are threaded on the bottom inner wall of the fixed frame (81). The fixed frame (81) is fixedly connected to the top of the mounting base (6) by the two screws (82). The fine adjustment bolt (84) is threaded on one side of the fixed frame (81). The contact head (85) is fixedly connected to one end of the fine adjustment bolt (84). The scale rod (83) is fixedly connected to the inner wall of one side of the fixed frame (81).

7. The precast beam end formwork installation accuracy calibration device according to claim 1, characterized in that, A lower scale (5) is fixedly connected to the outer side of the transverse reference rod (1), and an upper scale (4) is fixedly connected to one side of the longitudinal reference rod (2).

8. The precast beam end formwork installation accuracy calibration device according to claim 1, characterized in that, The device also includes a laser line projector (10) for measuring verticality. The bottom of the laser line projector (10) is fixedly connected to a suction cup (9), which can be adsorbed and fixedly installed on the horizontal reference rod (1) or the vertical reference rod (2).

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