Inclination adjusting device for end mold of prefabricated box girder

Abstract

The invention relates to an inclination adjusting device for an end mold of a prefabricated box girder, and belongs to the technology of the end mold of the box girder, the inclination adjusting device comprises a mounting base, a transverse pushing strip block, a lateral adjusting assembly and an end mold body, the mounting base is provided with a limiting chute, and a transverse pushing assembly is mounted in the limiting chute; the transverse pushing strip block is fixed to the transverse moving pushing assembly, and the two ends of the transverse pushing strip block are slidably connected to a limiting frame installed at the top of the installation base in a sleeving mode. The lateral adjusting assembly is installed in a limiting installation groove formed in the transverse pushing strip block, only two upper push-pull air cylinders and only two lower push-pull air cylinders are rotationally installed on the lateral adjusting assembly, and the two upper push-pull air cylinders and the two lower push-pull air cylinders are symmetrically distributed on the lateral adjusting assembly. The inclination of the end mold body can be rapidly and accurately adjusted, preliminary positioning and stable push-pull are completed, push-pull is accurately controlled according to real-time feedback, connection is stable, disassembly and assembly are convenient, the box girder production quality and efficiency are improved, and manual errors are reduced.

Description

Technical Field

[0001] This invention relates to the field of box girder end mold technology, and in particular to a device for adjusting the inclination of precast box girder end mold. Background Technology

[0002] The end formwork of a precast box girder is a crucial template used to shape both ends of the precast box girder. Its function is to ensure that the concrete at the box girder ends is poured into the geometric shape and dimensions required by the design. Because the ends of the precast box girder undergo longitudinal compressive deformation during prestressing, inaccurate inclination of the end formwork can easily lead to quality problems such as misaligned surfaces, loose joints, or uneven thickness of the reinforcing steel protective layer. The inclination adjustment device for the precast box girder end formwork, through hydraulic or mechanical structures, can adjust the inclination angle of the end formwork to ensure that the end formwork is strictly perpendicular to the axis of the box girder, thereby guaranteeing the construction quality of the box girder ends and meeting the structural stress and durability requirements of the bridge.

[0003] However, there are many problems in the production of precast box girders. On the one hand, the positioning and adjustment of the end formwork relies on manual labor, making it difficult to guarantee accuracy. The large differences in operation among different workers lead to large dimensional deviations in the produced box girders, affecting the overall quality. On the other hand, the adjustment process is cumbersome and laborious, requiring multiple measurements and repeated adjustments, which is time-consuming and inefficient. Moreover, during the pouring process, it is impossible to monitor changes in the inclination of the end formwork in real time, making timely adjustments difficult and prone to quality defects in the box girder. Once the inclination of the end formwork becomes abnormal, it is difficult to adjust it in time, leading to quality defects such as local deformation and uneven stress in the box girder, which has certain drawbacks in its use. Summary of the Invention

[0004] To overcome the technical defects of the existing technology, the present invention provides a precast box girder end mold inclination adjustment device, which can quickly and accurately adjust the end mold inclination, realize initial positioning, smooth push-pull and push-pull adjustment at different positions, meet the lateral positioning requirements, provide a stable connection and convenient installation and disassembly, improve the production accuracy, quality and efficiency of precast box girders, and reduce human error.

[0005] The technical solution adopted in this invention is as follows: It includes a mounting base, a transverse propulsion block, a lateral adjustment component, and an end mold body. The mounting base has a limiting groove, in which the transverse propulsion component is installed. The transverse propulsion block is fixed to the transverse propulsion component, and both ends of the transverse propulsion block are slidably sleeved onto the limiting frame installed on the top of the mounting base. The lateral adjustment component is installed in a limiting mounting groove on the transverse propulsion block, and an upper push-pull cylinder and a lower push-pull cylinder are rotatably mounted on the lateral adjustment component. The number of the downward push-pull cylinders is only two, and the two upward push-pull cylinders and the two downward push-pull cylinders are symmetrically distributed in the lateral adjustment assembly. The end mold body is slidably connected to the telescopic ends of the upward push-pull cylinders and the downward push-pull cylinders through the positioning pin assembly. The angle sensor is installed on the end mold body, and the angle sensor is located at the four corners of the end mold body. The outer flexible partition frame and the inner flexible partition frame are fixedly installed on the inner wall of the end mold body. The end mold body is connected to the side mold through the outer flexible partition frame and the inner flexible partition frame.

[0006] Preferably, in order to move the push threaded block by controlling the rotation of the push threaded rod, thereby driving the lateral push block to move through the vertical positioning frame, the lateral push assembly includes the push threaded rod rotatably installed in the limiting slide groove, the push threaded rod being threadedly sleeved with the push threaded block, and the lateral push block being fixedly connected to the push threaded block through the vertical positioning frame.

[0007] Preferably, in order to be activated by the drive motor, the push threaded rod can be rotated in the limiting slide groove through the first rotary joint. The drive motor is fixedly installed at one end of the mounting base, one end of the push threaded rod is fixedly connected to the output shaft of the drive motor, and the other end of the push threaded rod is rotatably connected to one end of the limiting slide groove through the first rotary joint.

[0008] Preferably, in order to limit the movement of the push threaded block, the push threaded block is slidably engaged in the limiting groove.

[0009] Preferably, in order to control the rotation of the bidirectional lead screw so that the first lateral slider and the second lateral slider can move synchronously in opposite directions, thereby enabling lateral adjustment of the positions of the upper push-pull cylinders and the lower push-pull cylinders on both sides, the lateral adjustment assembly includes the bidirectional lead screw rotatably mounted in the limiting mounting groove. The reverse thread ends of the bidirectional lead screw are respectively threaded with the first lateral slider and the second lateral slider, which are symmetrically distributed. The adjusting connecting seat is fixedly mounted on both the first lateral slider and the second lateral slider. The upper push-pull cylinder and the lower push-pull cylinder are rotatably connected to the upper and lower ends of the adjusting connecting seat through the first rotating seat and the second rotating seat, respectively.

[0010] Preferably, in order to control the servo motor to turn on, the bidirectional lead screw can rotate in the limiting mounting groove through the second rotary joint. The servo motor is fixedly installed on the inner wall of one end of the limiting mounting groove, one end of the bidirectional lead screw is fixedly connected to the output shaft of the servo motor, and the other end of the bidirectional lead screw is rotatably connected to the inner wall of the other end of the limiting mounting groove through the second rotary joint.

[0011] Preferably, in order to allow the first lateral slider and the second lateral slider to slide within the limiting mounting groove, both the first lateral slider and the second lateral slider are slidably engaged within the limiting mounting groove.

[0012] Preferably, in order to enable the end mold body to be connected to the telescopic ends of the upper push-pull cylinder and the lower push-pull cylinder via the connecting pin block and the U-shaped locking seat, the positioning pin assembly includes the U-shaped locking seat fixed to the telescopic ends of the upper push-pull cylinder and the lower push-pull cylinder and the sliding seat fixed to the end mold body. The smooth connecting rod is fixedly installed on the inner wall of the sliding seat, and the connecting pin block is slidably sleeved on the smooth connecting rod. One end of the connecting pin block is inserted into the U-shaped locking seat.

[0013] Preferably, in order to fix the connecting pin block and the U-shaped locking seat through the positioning pin rod, an L-shaped mounting plate is fixedly installed on the outer wall of the U-shaped locking seat, the positioning pin rod is slidably inserted into the L-shaped mounting plate, one end of the positioning pin rod is inserted into the positioning pin hole correspondingly opened on the U-shaped locking seat and the connecting pin block, and the other end of the positioning pin rod is fixedly installed with the lifting handle.

[0014] Preferably, in order to enable the annular abutment plate to drive the positioning pin rod to be fixedly inserted into the positioning pin hole by means of the abutment spring, the annular abutment plate is fixedly sleeved on the positioning pin rod, and the annular abutment plate is elastically connected to the inner wall of the L-shaped mounting plate by means of the abutment spring.

[0015] The beneficial effects of this invention are as follows: the lateral movement pushing component enables the initial positioning of the end mold body and the overall smooth pushing and pulling; at the same time, the lateral adjustment component combined with the angle sensor enables the pushing and pulling adjustment at different positions based on real-time monitoring feedback data, meeting different lateral positioning requirements and accurately controlling the pushing and pulling position; the positioning pin component enables the end mold to be securely connected to the telescopic ends of the upper and lower pushing and pulling cylinders, facilitating easy installation and disassembly, and allowing for quick and accurate adjustment of the end mold inclination, improving the production accuracy and quality of precast box girders, reducing human error and workload, and increasing production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the transverse pushing component of the present invention; Figure 4 This is a schematic diagram of the structure of the lateral adjustment component of the present invention; Figure 5 This is a schematic diagram of the installation structure of the connecting pin block of the present invention; Figure 6 This is a schematic diagram of the positioning pin of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Mounting base; 2. Lateral pushing assembly; 201. Pushing threaded rod; 202. Pushing threaded block; 203. Vertical positioning frame; 204. Drive motor; 205. First rotary joint; 3. Lateral pushing block; 4. Limiting frame; 5. Lateral adjustment assembly; 501. Bidirectional lead screw; 502. First lateral slider; 503. Second lateral slider; 504. Adjustment connecting seat; 505. First rotating seat; 506. Second rotating seat; 50 7. Servo motor; 508. Second rotary joint; 6. Upper push-pull cylinder; 7. Lower push-pull cylinder; 8. End mold body; 9. Positioning pin assembly; 901. U-shaped snap-fit ​​seat; 902. Sliding seat; 903. Smooth connecting rod; 904. Connecting pin block; 905. L-shaped mounting plate; 906. Positioning pin rod; 907. Lifting handle; 908. Annular clamping plate; 909. Clamping spring; 10. Angle sensor; 11. Outer flexible partition frame; 12. Inner flexible partition frame. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-6As shown, this embodiment provides a precast box girder end formwork inclination adjustment device, including a mounting base 1, a transverse pushing block 3, a lateral adjustment component 5, and an end formwork body 8. The mounting base 1 has a limiting groove, in which a transverse pushing component 2 is installed; the transverse pushing block 3 is fixed on the transverse pushing component 2, and both ends of the transverse pushing block 3 are slidably sleeved on the limiting frame 4 installed on the top of the mounting base 1; the lateral adjustment component 5 is installed in the limiting mounting groove on the transverse pushing block 3, and an upper push-pull cylinder 6 and a lower push-pull cylinder 7 are rotatably installed on the lateral adjustment component 5. There are only two push-pull cylinders 6 and two lower push-pull cylinders 7, and the two upper push-pull cylinders 6 and the two lower push-pull cylinders 7 are symmetrically distributed on the lateral adjustment assembly 5. The end mold body 8 is slidably connected to the telescopic ends of the upper push-pull cylinders 6 and lower push-pull cylinders 7 through the positioning pin assembly 9. Angle sensors 10 are installed on the end mold body 8, and the angle sensors 10 are located at the four corners of the end mold body 8. An outer flexible partition frame 11 and an inner flexible partition frame 12 are fixedly installed on the inner wall of the end mold body 8. The end mold body 8 is connected to the side mold through the outer flexible partition frame 11 and the inner flexible partition frame 12. When using this precast box girder end mold tilt adjustment device, the lateral movement pushing assembly 2 drives the lateral advancement strip 3 to move laterally for initial positioning. During the pouring process, the tilt angle is monitored in real time by the angle sensors 10 at the four corners of the end mold body 8 for data feedback. The lateral adjustment assembly 5 is used to move the upper push-pull cylinders 6 and lower push-pull cylinders 7 laterally to accurately adjust the position. Next, by extending and retracting the upper push-pull cylinder 6 and the lower push-pull cylinder 7, the tilt of the end mold body 8 is adjusted. During the adjustment process, the tilt angle is detected by the angle sensor 10, and the push-pull position is precisely controlled. This allows for quick and accurate adjustment of the end mold tilt, improving the production accuracy and quality of precast box girders, reducing errors and workload from manual adjustments, and providing flexible usage to improve production efficiency. Furthermore, when adjusting the tilt of the end mold body 8, the outer flexible partition frame 11 and the inner flexible partition frame 12 are connected to the side mold, which can seal the space between the end mold body 8 and the side mold, preventing concrete leakage and ensuring construction quality.

[0019] As a technical optimization solution of the present invention, specifically as follows: Figure 3As shown, the transverse pushing assembly 2 includes a pushing threaded rod 201 rotatably mounted in a limiting slide groove. A pushing threaded block 202 is threadedly sleeved on the pushing threaded rod 201. The transverse pushing block 3 is fixedly connected to the pushing threaded block 202 via a vertical positioning frame 203. A drive motor 204 is fixedly mounted on one end of the mounting base 1. One end of the pushing threaded rod 201 is fixedly connected to the output shaft of the drive motor 204. The other end of the pushing threaded rod 201 is rotatably connected to one end of the limiting slide groove via a first rotating joint 205. The pushing threaded block 202 is slidably engaged in the limiting slide groove. In use, the drive motor 204 at one end of the mounting base 1 is turned on, and its output shaft drives the pushing threaded rod 201 to rotate within the limiting slide groove via the first rotating joint 205. Since the pushing threaded block 202 is threadedly sleeved on the pushing threaded rod 201 and slidably engaged in the limiting slide groove, the rotation of the pushing threaded rod 201 will drive the pushing threaded block 202 to move. The threaded block 202 drives the horizontally advancing strip 3 through the vertical positioning frame 203, so that it can move smoothly in the horizontal direction under the constraint of the limiting frame 4 at the top of the mounting base 1, thereby realizing the overall push and pull of the end mold body 8.

[0020] As a technical optimization solution of the present invention, specifically as follows: Figure 4 As shown, the lateral adjustment assembly 5 includes a bidirectional lead screw 501 rotatably mounted in a limiting mounting groove. The reverse threaded ends of the bidirectional lead screw 501 are respectively threaded with a first lateral slider 502 and a second lateral slider 503, which are symmetrically distributed. Adjusting connecting seats 504 are fixedly mounted on both the first lateral slider 502 and the second lateral slider 503. The upper push-pull cylinder 6 and the lower push-pull cylinder 7 are rotatably connected to the upper and lower ends of the adjusting connecting seat 504 via a first rotating seat 505 and a second rotating seat 506, respectively. A servo motor 507 is fixedly installed on the inner wall of one end of the mounting groove. One end of a bidirectional lead screw 501 is fixedly connected to the output shaft of the servo motor 507, and the other end of the bidirectional lead screw 501 is rotatably connected to the inner wall of the other end of the limiting mounting groove through a second rotary joint 508. The first lateral slider 502 and the second lateral slider 503 are both slidably engaged in the limiting mounting groove. In use, the servo motor 507 at one end of the limiting mounting groove is started, and its output shaft drives the bidirectional lead screw 501 to rotate in the limiting mounting groove through the second rotary joint 508. Because the bidirectional lead screw 501 has reverse threads, the first lateral slider 502 and the second lateral slider 503 will move synchronously in opposite directions, and the two are slidably engaged in the groove to ensure stability. They drive the adjusting connecting seat 504 to move, and then through the first rotating seat 505 and the second rotating seat 506, the upper push-pull cylinder 6 and the lower push-pull cylinder 7 are laterally adjusted to meet the lateral positioning requirements during the end mold tilt adjustment process.

[0021] As a technical optimization solution of the present invention, specifically as follows: Figure 5 and Figure 6As shown, the positioning pin assembly 9 includes a U-shaped locking seat 901 fixed to the telescopic ends of the upper push-pull cylinder 6 and the lower push-pull cylinder 7, and a sliding seat 902 fixed to the end mold body 8. A smooth connecting rod 903 is fixedly installed on the inner wall of the sliding seat 902. A connecting pin block 904 is slidably sleeved on the smooth connecting rod 903. One end of the connecting pin block 904 is inserted into the U-shaped locking seat 901. An L-shaped mounting plate 905 is fixedly installed on the outer wall of the U-shaped locking seat 901. A positioning pin rod 906 is slidably inserted into the L-shaped mounting plate 905. One end of the positioning pin rod 906 is inserted into the positioning pin holes corresponding to those on the U-shaped locking seat 901 and the connecting pin block 904. A lifting handle 907 is fixedly installed on the other end of the positioning pin rod 906. An annular abutment piece 908 is fixedly sleeved on the positioning pin rod 906. The annular abutment piece 908 is elastically connected to the inner wall of the L-shaped mounting plate 905 through a abutment spring 909. In use, the end mold body 8 is brought close to the upper push-pull cylinder 6 and the lower push-pull cylinder 7, pushing the connecting pin block 904 inside the sliding seat 902 to slide along the smooth connecting rod 903, so that one end of it is inserted into the U-shaped retaining seat 901. Next, the lifting handle 907 is pulled, allowing the positioning pin rod 906 to move outward against the elastic force of the clamping spring 909. After the connecting pin block 904 is inserted into place, the lifting handle 907 is released. Under the action of the clamping spring 909, the annular clamping plate 908 drives the positioning pin rod 906 to insert into the corresponding positioning pin hole of the U-shaped retaining seat 901 and the connecting pin block 904, realizing a stable connection between the end mold body 8 and the cylinder extension end, which facilitates subsequent adjustment of the tilt angle and makes installation and disassembly more convenient.

[0022] In use, the side mold is first fixedly connected to the outer flexible partition frame 11 and the inner flexible partition frame 12. The drive motor 204 at one end of the mounting base 1 is turned on, and its output shaft drives the push threaded rod 201 to rotate in the limiting groove via the first rotary joint 205. Because the push threaded block 202 is threadedly sleeved on the push threaded rod 201 and slidably engaged in the limiting groove, the rotation of the push threaded rod 201 drives the push threaded block 202 to move. The push threaded block 202 drives the horizontal push strip 3 through the vertical positioning frame 203, and moves horizontally smoothly under the constraint of the limiting frame 4 at the top of the mounting base 1, realizing the initial push-pull positioning of the end mold body 8. The servo motor 507 at one end of the limiting mounting groove is started, and its output shaft drives the bidirectional screw 501 to rotate in the limiting mounting groove via the second rotary joint 508. Because the bidirectional screw 501 has reverse threads, the first lateral slider 502 and the second lateral slider 502 rotate in opposite directions. Block 503 moves synchronously in opposite directions, driving the adjusting connecting seat 504 to move. This, in turn, through the first rotating seat 505 and the second rotating seat 506, causes the upper push-pull cylinder 6 and the lower push-pull cylinder 7 to adjust their positions laterally, meeting the lateral positioning requirements for adjusting the end mold tilt. The end mold body 8 approaches the upper push-pull cylinder 6 and the lower push-pull cylinder 7, pushing the connecting pin block 904 in the sliding seat 902 to slide along the smooth connecting rod 903 into the U-shaped snap-fit ​​seat 901. Pulling the lifting handle 907, the connecting pin block 904 is released after being inserted into place. Under the action of the clamping spring 909, the positioning pin rod 906 is inserted into the positioning pin hole, achieving a stable connection. During the pouring process, the angle sensors 10 at the four corners of the end mold body 8 monitor the tilt angle in real time and provide feedback data. By extending and retracting the upper push-pull cylinder 6 and the lower push-pull cylinder 7, the tilt of the end mold body 8 is adjusted, and the push-pull position is precisely controlled based on the detection data.

[0023] The foregoing has shown and described the basic principles, main features and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from the spirit and scope of this invention. All such changes and modifications fall within the scope of this invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for adjusting the inclination of the end formwork of a precast box girder, characterized in that, include: The mounting base (1) has a limiting slide groove, and a transverse pushing component (2) is installed in the limiting slide groove. The transverse pushing block (3) is fixed on the transverse pushing component (2), and the two ends of the transverse pushing block (3) are slidably sleeved on the limiting frame (4) installed on the top of the mounting base (1); The lateral adjustment component (5) is installed in the limiting installation groove opened on the transverse propulsion block (3). The lateral adjustment component (5) is rotatably mounted with an upper push-pull cylinder (6) and a lower push-pull cylinder (7). There are only two upper push-pull cylinders (6) and two lower push-pull cylinders (7), and the two upper push-pull cylinders (6) and the two lower push-pull cylinders (7) are symmetrically distributed on the lateral adjustment component (5). The end mold body (8) is slidably connected to the telescopic ends of the upper push-pull cylinder (6) and the lower push-pull cylinder (7) through the positioning pin assembly (9). An angle sensor (10) is installed on the end mold body (8). The angle sensor (10) is located at the four corners of the end mold body (8). An outer flexible partition frame (11) and an inner flexible partition frame (12) are fixedly installed on the inner wall of the end mold body (8). The end mold body (8) is connected to the side mold through the outer flexible partition frame (11) and the inner flexible partition frame (12).

2. The precast box girder end formwork inclination adjustment device according to claim 1, characterized in that: The transverse pushing assembly (2) includes a pushing threaded rod (201) rotatably installed in the limiting slide groove, a pushing threaded block (202) threadedly sleeved on the pushing threaded rod (201), and the transverse pushing strip (3) is fixedly connected to the pushing threaded block (202) through a vertical positioning frame (203).

3. The precast box girder end formwork inclination adjustment device according to claim 2, characterized in that: One end of the mounting base (1) is fixedly mounted with a drive motor (204), one end of the push thread rod (201) is fixedly connected to the output shaft of the drive motor (204), and the other end of the push thread rod (201) is rotatably connected to one end of the limiting slide groove through the first rotating joint (205).

4. The precast box girder end formwork inclination adjustment device according to claim 3, characterized in that: The push threaded block (202) is slidably engaged in the limiting groove.

5. The precast box girder end formwork inclination adjustment device according to claim 1, characterized in that: The lateral adjustment assembly (5) includes a bidirectional lead screw (501) rotatably mounted in the limiting mounting groove. The reverse thread ends of the bidirectional lead screw (501) are respectively threaded with a first lateral slider (502) and a second lateral slider (503) that are symmetrically distributed. An adjustment connecting seat (504) is fixedly mounted on both the first lateral slider (502) and the second lateral slider (503). The upper push-pull cylinder (6) and the lower push-pull cylinder (7) are rotatably connected to the upper and lower ends of the adjustment connecting seat (504) through the first rotating seat (505) and the second rotating seat (506), respectively.

6. The precast box girder end formwork inclination adjustment device according to claim 5, characterized in that: A servo motor (507) is fixedly installed on the inner wall of one end of the limiting installation groove. One end of the bidirectional lead screw (501) is fixedly connected to the output shaft of the servo motor (507), and the other end of the bidirectional lead screw (501) is rotatably connected to the inner wall of the other end of the limiting installation groove through a second rotary joint (508).

7. The precast box girder end formwork inclination adjustment device according to claim 6, characterized in that: Both the first lateral slider (502) and the second lateral slider (503) are slidably engaged in the limiting mounting groove.

8. The precast box girder end formwork inclination adjustment device according to claim 1, characterized in that: The positioning pin assembly (9) includes a U-shaped snap-fit ​​seat (901) fixed to the telescopic ends of the upper push-pull cylinder (6) and the lower push-pull cylinder (7) and a sliding seat (902) fixed to the end mold body (8). A smooth connecting rod (903) is fixedly installed on the inner wall of the sliding seat (902). A connecting pin block (904) is slidably sleeved on the smooth connecting rod (903). One end of the connecting pin block (904) is inserted into the U-shaped snap-fit ​​seat (901).

9. The precast box girder end formwork inclination adjustment device according to claim 8, characterized in that: An L-shaped mounting plate (905) is fixedly installed on the outer wall of the U-shaped connector (901). A positioning pin (906) is slidably inserted into the L-shaped mounting plate (905). One end of the positioning pin (906) is inserted into the positioning pin hole corresponding to the U-shaped connector (901) and the connecting pin block (904). The other end of the positioning pin (906) is fixedly installed with a lifting handle (907).

10. The precast box girder end formwork inclination adjustment device according to claim 9, characterized in that: An annular abutment piece (908) is fixedly sleeved on the positioning pin (906), and the annular abutment piece (908) is elastically connected to the inner wall of the L-shaped mounting plate (905) through a clamping spring (909).

Images