A device for rapid and accurate positioning of prestressed pipes of cast-in-place continuous box girder

Abstract

The application discloses a device for fast and accurate positioning of cast-in-place continuous box girder prestressed pipes, and relates to the related technical field of bridge construction.The device comprises a bottom plate, left and right parts of the upper side of the bottom plate are fixed with supporting plates, the upper side of the bottom plate between the two supporting plates is symmetrically provided with positioning plates, the front parts of the opposite side walls of the two supporting plates are fixed with L-shaped plates, the lower side of the L-shaped plate is fixed with an inclined curved rod, and the end parts of the inclined curved rod away from the L-shaped plate are fixed with T-shaped blocks;the upper side of the bottom plate is provided with T-shaped slits corresponding to the positions of the T-shaped blocks, and the opposite side wall positions of the two positioning plates consistent in left and right directions are provided with buffer plates.The device is used by the positioning plates and the buffer plates, and the positioning and placing functions are realized, so that subsequent installation is facilitated, the device has certain buffering capacity, the pipes can be stably and quickly positioned, the inclined curved rod and the T-shaped blocks are arranged, the surface is blocked, and the probability of pipe position deviation is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of bridge construction, and in particular relates to a device for rapid and accurate positioning of prestressed ducts in cast-in-place continuous box girders. Background Technology

[0002] The installation of prestressed ducts is an extremely important part of the construction of prestressed box girders. The accuracy of its installation and positioning directly affects the effect of prestressing tension and may even reduce the overall safety and service life of the beam. Therefore, in order to improve the installation of ducts, it is necessary to use a corresponding rapid positioning device to facilitate the rapid installation of prestressed ducts.

[0003] Existing publicly available documents, such as CN114032774A, disclose a device for positioning prestressed ducts in cast-in-place continuous box girders. This device includes two connecting angle steels, with multiple adjusting angle steels fixedly connected to the rear sides of the two connecting angle steels. This invention adjusts and positions the prestressed ducts before fixing the web reinforcement. This approach facilitates the adjustment of the prestressed ducts, reducing adjustment time and avoiding the problem of fixing the web reinforcements first, which can lead to deformation of the prestressed ducts during installation due to the smaller spacing between the reinforcements and difficulty in adjustment, resulting in positional deviations. It also facilitates the fixing of the prestressed ducts, avoiding the need to fix the positioning reinforcements after fixing the web reinforcements, as the interference of the internal reinforcements prevents the prestressed ducts from contacting the positioning reinforcements, thus affecting the accuracy of the prestressed duct position. However, this invention still has the following drawbacks in practical use:

[0004] 1. When installing pipelines using rapid positioning, the pipelines are usually placed directly. This positioning method cannot guarantee the accuracy of the pipeline positioning. At the same time, when the pipeline slides down, it will have a large impact without a buffer, which may lead to damage to the pipeline during the positioning and installation process.

[0005] 2. When quickly locating a pipeline, the positioning device uses a variety of structures that can easily cause obstructions, resulting in a significant shift in the pipeline's position during the positioning process.

[0006] Therefore, the existing devices for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders cannot meet the needs of actual use, so there is an urgent need for improved technologies to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a device for rapid and accurate positioning of prestressed ducts in cast-in-place continuous box girders. By setting and using a positioning plate and a buffer plate, the device completes the positioning and placement function to facilitate subsequent installation. It also has a certain buffering capacity to ensure that the duct can be stably and quickly positioned. At the same time, the setting of the inclined curved rod and T-shaped block can achieve surface obstruction and reduce the probability of duct position deviation.

[0008] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0009] The present invention is a device for rapid and accurate positioning of prestressed ducts in cast-in-place continuous box girders. It includes a base plate, with support plates fixed on the left and right sides of the upper part of the base plate. Positioning plates are symmetrically arranged on the upper part of the base plate between the two support plates, and multiple positioning plates are linearly and evenly distributed along the sides of the support plates.

[0010] An L-shaped plate is fixed to the front part of the opposite side wall of the two support plates. An inclined curved rod is fixed to the lower side of the L-shaped plate. A T-shaped block is fixed to the end of the inclined curved rod away from the L-shaped plate.

[0011] T-shaped slots are provided on the upper side of the base plate at the positions corresponding to the T-shaped blocks, and the T-shaped blocks slide inside the T-shaped slots;

[0012] A support cylinder is installed on the upper part between two positioning plates with the same square shape at the front and back. A weight sensor is fixed to the piston end of each support cylinder, and the support cylinder is fixedly connected to the adjacent support plate.

[0013] Two positioning plates, one on the left and one on the right, are equipped with buffer plates on their opposite sidewalls, and buffer springs are fixed between the buffer plates and the adjacent positioning plates.

[0014] Inclined plates are fixed to the upper parts of the opposite side walls of the two support plates, and the two inclined plates on the left and right sides are inclined inward relative to each other, with the inclined plates positioned above the positioning plate.

[0015] Furthermore, hook-shaped sliding plates are fixed to the lower side of the buffer plate, and the hook-shaped sliding plates are all arranged with their curved surfaces facing upwards.

[0016] Furthermore, U-shaped plates are fixed at the positions of the positioning plates on the opposite side walls of the two support plates, with the positioning plates located on the inner side of the adjacent U-shaped plates.

[0017] Furthermore, a rotating block is fixed to the rear side of the positioning plate, located inside the U-shaped plate, and a connecting rotating hole is passed through the front side of each rotating block.

[0018] Furthermore, a rotating rod is fixed to the inner side of each U-shaped plate, and a torsion spring is rotatably sleeved on the outer side of each rotating rod. One end of the torsion spring is fixedly connected to the outer side of the adjacent rotating rod, and the other end of the torsion spring is fixedly connected to the inner side of the corresponding connecting rotating hole.

[0019] Furthermore, a vertical plate is provided at the rear position between the two support plates, and the vertical plate is fixedly connected to the base plate.

[0020] Furthermore, a progressive plate is fixed to the rear side wall of the support plate at the position corresponding to the U-shaped plate, and a progressive motor is fixed to the rear side of the upright plate at the position corresponding to the progressive plate.

[0021] Furthermore, each of the shaft ends of the progressive motor passing through the vertical plate is fixed with a progressive screw, and each progressive plate is rotatably connected to the ball bearing seat of the corresponding progressive screw.

[0022] Furthermore, the U-shaped plate has through holes at the positions corresponding to the advancing lead screws, and the side wall of the L-shaped plate has through holes at the positions corresponding to the advancing lead screws. The front end of the advancing lead screw passes through the corresponding through holes and through holes.

[0023] The present invention has the following beneficial effects:

[0024] 1. This invention, by setting up positioning plates and buffer plates, moves the entire device to the edge of the corresponding installation position. Then, by placing the pipe at the position of the inclined plate, the pipe will slide directly from the inclined plate to the position between the left and right positioning plates. Therefore, the pipe will connect with the weight sensor, which will detect the presence of the pipe and support the cylinder to retract, causing the pipe to continue to fall downward. At this time, the pipe will connect with the buffer plate, so the buffer plate and the buffer spring will push the pipe in the opposite direction, thus cushioning the pipe. At the same time, the pipe will continue to move downward, pushing the left and right positioning plates, so that the positions under the two positioning plates on the left and right sides are opened in opposite directions. At the same time, the pipe slides out from the position between the left and right positioning plates, thus completing the positioning and placement function for subsequent installation. It also has a certain buffering capacity to ensure that the pipe can be stably and quickly positioned.

[0025] 2. This invention is equipped with an inclined curved rod and a T-shaped block. Since the T-shaped block is located behind the support plate, when the T-shaped block moves to the front end of the T-shaped strip, the support plate will move completely out from the top of the bottom plate. As a result, the positioning plate between the two support plates will also move completely from the top of the bottom plate to the front of the bottom plate. At this time, after the pipe falls downward between the positioning plates, the pipe will not be blocked by the bottom plate. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure;

[0028] Figure 2 This is a structural diagram of the support plate and positioning plate;

[0029] Figure 3 Here is a structural diagram of the positioning plate;

[0030] Figure 4 Structural diagram of the U-shaped plate and the base plate;

[0031] Figure 5 This is a structural diagram of the support plate and the U-shaped plate;

[0032] Figure 6 This is a structural diagram of the base plate;

[0033] Figure 7 This is a structural diagram of a U-shaped plate.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Base plate; 101. Vertical plate; 102. Progressive motor; 103. Progressive lead screw; 104. T-shaped slot; 2. Support plate; 201. Inclined plate; 202. Progressive plate; 203. Support cylinder; 2031. Weight sensor; 204. L-shaped plate; 2041. Through hole; 3. Positioning plate; 301. Buffer plate; 302. Buffer spring; 303. Rotating block; 304. Connecting rotating hole; 305. Hook-shaped sliding plate; 4. U-shaped plate; 401. Rotating rod; 402. Torsion spring; 403. Through hole; 5. Inclined crank; 6. T-shaped block. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] Please see Figures 1 to 7 As shown, the present invention is a device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders. It includes a base plate 1, with support plates 2 fixed on the left and right sides of the upper side of the base plate 1. Positioning plates 3 are symmetrically arranged on the upper side of the base plate 1 between the two support plates 2, and multiple positioning plates 3 are linearly and evenly distributed along the sides of the support plates 2. An L-shaped plate 204 is fixed to the front part of the opposite sidewall of the two support plates 2. An inclined curved rod 5 is fixed to the lower side of the L-shaped plate 204. A T-shaped block 6 is fixed to the end of the inclined curved rod 5 away from the L-shaped plate 204. A T-shaped slot 104 is opened on the upper side of the base plate 1 corresponding to the position of the T-shaped block 6. The T-shaped block 6 is slidably placed inside the T-shaped slot 104.

[0038] With the above structure set up, as shown in the attached figure, the T-shaped block 6 is located behind the support plate 2. Therefore, when the T-shaped block 6 moves to the front end of the T-shaped slot 104, the support plate 2 will move out completely from the top of the bottom plate 1. As a result, the positioning plate 3 between the two support plates 2 will also move completely from the top of the bottom plate 1 to the front of the bottom plate 1. At the same time, after the T-shaped block 6 is limited to the inside of the T-shaped slot 104, the T-shaped block 6 can also support the inclined curved rod 5, thereby supporting the support plate 2.

[0039] A support cylinder 203 is provided on the upper part between the two identical square positioning plates 3. A weight sensor 2031 is fixed to the piston end of the support cylinder 203. The support cylinder 203 is fixedly connected to the adjacent support plate 2. A buffer plate 301 is provided on the opposite side wall of the two identical left and right positioning plates 3. A buffer spring 302 is fixed between the buffer plate 301 and the adjacent positioning plate 3. An inclined plate 201 is fixed on the upper part of the opposite side wall of the two support plates 2. The two inclined plates 201 on the left and right are inclined inwards relative to each other. The inclined plate 201 is located above the positioning plate 3.

[0040] With the above-described structure, when positioning and installing the pipe, the entire device is moved to the edge of the corresponding installation position. Then, by placing the pipe on the inclined plate 201, the pipe will slide directly from the inclined plate 201 to the position between the left and right positioning plates 3. Therefore, the pipe will connect with the weight sensor 2031, which is connected to the external control system. The weight sensor 2031 detects the presence of the pipe, thereby supporting the retraction of the cylinder 203 and causing the pipe to continue falling downwards. At this time, the pipe will connect with the buffer plate 301. Therefore, the buffer plate 301 and the buffer spring 302 will push the pipe in the opposite direction, thereby cushioning the pipe. At the same time, the pipe will continue to move downwards, thus pushing the left and right positioning plates 3. At this time, the positions below the left and right positioning plates 3 will be opened in opposite directions, and the pipe will slide out from the position between the left and right positioning plates 3, thereby completing the positioning and placement function for subsequent installation.

[0041] Among them, such as Figures 1 to 3 As shown, hook-shaped sliding plates 305 are fixed to the lower side of the buffer plate 301. The hook-shaped sliding plates 305 are all set upwards. U-shaped plates 4 are fixed to the opposite side walls of the two support plates 2 at the positions corresponding to the positioning plates 3. The positioning plates 3 are located inside the adjacent U-shaped plates 4. Since the positioning plates 3 are in an inverted V-shape before being pushed by the pipe, when the pipe slides down, it will push the positioning plates 3 on the left and right sides, so that the positioning plates 3 will rotate in the position of the U-shaped plates 4.

[0042] Among them, such as Figure 3 , 7As shown, a rotating block 303 is fixed to the rear side of the positioning plate 3, located inside the U-shaped plate 4. Each rotating block 303 has a connecting rotating hole 304 penetrating its front side. A rotating rod 401 is fixed to the inner side of the U-shaped plate 4. When the positioning plate 3 rotates, it drives the rotating block 303 to rotate within the U-shaped plate 4. Consequently, the rotating block 303 rotates through the connecting rotating hole 304 on the surface of the rotating rod 401. A torsion spring 402 is rotatably sleeved on the surface of each rotating rod 401. One end of the torsion spring 402 is connected to a nearby... The rotating rod 401 is fixedly connected to the surface. When the positioning plate 3 rotates, the positioning plate 3 will push the torsion spring 402. Thus, after the pipe leaves the position between the positioning plates 3, the torsion spring 402 will push the positioning plate 3. At the same time, the setting of the torsion spring 402 makes the left and right positioning plates 3 stably in an inverted V shape. The other end of the torsion spring 402 is fixedly connected to the inner side of the corresponding connecting rotating hole 304. A vertical plate 101 is set at the rear position between the two support plates 2, and the vertical plate 101 is fixedly connected to the base plate 1.

[0043] Among them, such as Figures 4 to 6 As shown, a progressive plate 202 is fixed at the position of the U-shaped plate 4 on the rear side wall of the support plate 2, and a progressive motor 102 is fixed at the position of the progressive plate 202 on the rear side of the upright plate 101. A progressive screw 103 is fixed at the end of the rotating shaft of the progressive motor 102 passing through the upright plate 101. The progressive plate 202 is rotatably connected to the ball seat of the corresponding progressive screw 103. A through hole 403 is opened at the position of the U-shaped plate 4 corresponding to the position of the progressive screw 103. A through hole 2041 is opened at the position of the L-shaped plate 204 corresponding to the position of the progressive screw 103. The front end of the progressive screw 103 passes through the corresponding through hole 403 and through hole 2041.

[0044] With the above structure, the advance motor 102 is controlled to work, which in turn drives the advance screw 103 to rotate. The advance screw 103 then drives the advance plate 202 to move back and forth through the ball bearing seat. Therefore, the advance plate 202 directly drives the support plate 2 to move on the upper side of the base plate 1. When both support plates 2 are completely removed from the upper side of the base plate 1, the pipe falls downward between the positioning plates 3, and the pipe will not be blocked by the base plate 1.

[0045] The above are merely preferred embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present invention.

Claims

1. A device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders, comprising a base plate (1), characterized in that: Support plates (2) are fixed on the left and right sides of the upper side of the base plate (1). Positioning plates (3) are symmetrically arranged on the upper side of the base plate (1) between the two support plates (2). Multiple positioning plates (3) are evenly distributed linearly along the sides of the support plates (2). U-shaped plates (4) are fixed on the opposite sidewalls of the two support plates (2) at the positions corresponding to the positioning plates (3). The positioning plates (3) are located inside the adjacent U-shaped plates (4). An L-shaped plate (204) is fixed to the front part of the opposite side wall of the two support plates (2), and an inclined curved rod (5) is fixed to the lower side of the L-shaped plate (204). A T-shaped block (6) is fixed to the end of the inclined curved rod (5) away from the L-shaped plate (204). The upper side of the base plate (1) is provided with T-shaped slots (104) corresponding to the position of the T-shaped block (6), and the T-shaped block (6) is slidably placed inside the T-shaped slots (104); A support cylinder (203) is provided on the upper part between the two positioning plates (3) that are consistent in front and back. A weight sensor (2031) is fixed on the piston end of the support cylinder (203), and the support cylinder (203) is fixedly connected to the adjacent support plate (2). Two positioning plates (3) that are consistent on the left and right sides are provided with buffer plates (301) at opposite side wall positions, and buffer springs (302) are fixed between the buffer plates (301) and the adjacent positioning plates (3). An inclined plate (201) is fixed to the upper part of the opposite side wall of each of the two support plates (2), and the two inclined plates (201) on the left and right sides are inclined inward relative to each other. The inclined plate (201) is located above the positioning plate (3).

2. The device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders according to claim 1, characterized in that: The buffer plate (301) is fixed with a hook-shaped sliding plate (305) on its lower side, and the hook-shaped sliding plate (305) has its hook-shaped arc surface facing upward.

3. The device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders according to claim 1, characterized in that: A rotating block (303) is fixed on the rear side of the positioning plate (3) located inside the U-shaped plate (4), and a connecting rotating hole (304) is passed through the front side of the rotating block (303).

4. The device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders according to claim 3, characterized in that: The inner side of each U-shaped plate (4) is fixed with a rotating rod (401), and the outer side of each rotating rod (401) is rotatably sleeved with a torsion spring (402). One end of the torsion spring (402) is fixedly connected to the outer side of the adjacent rotating rod (401), and the other end of the torsion spring (402) is fixedly connected to the inner side of the corresponding connecting rotating hole (304).

5. The device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders according to claim 4, characterized in that: A vertical plate (101) is provided at the rear position between the two support plates (2), and the vertical plate (101) is fixedly connected to the base plate (1).

6. The device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders according to claim 5, characterized in that: The rear side wall of the support plate (2) is fixed with a progressive plate (202) at the position corresponding to the U-shaped plate (4), and the rear side of the upright plate (101) is fixed with a progressive motor (102) at the position corresponding to the progressive plate (202).

7. The device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders according to claim 6, characterized in that: The advancing motor (102) has an advancing screw (103) fixed at the shaft end passing through the vertical plate (101), and the advancing plate (202) is rotatably connected to the ball bearing seat corresponding to the advancing screw (103).

8. The device for rapid and precise positioning of prestressed ducts in cast-in-place continuous box girders according to claim 7, characterized in that: The U-shaped plate (4) is provided with through holes (403) at the position corresponding to the progressive screw (103), and the side wall of the L-shaped plate (204) is provided with through holes (2041) at the position corresponding to the progressive screw (103). The front end of the progressive screw (103) passes through the corresponding through holes (403) and through holes (2041).

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