Automatic In-air Turning Device and Turning Method for Prefabricated Bridge Pier Columns

Abstract

The present invention relates to the technical field of bridge construction, and specifically refers to an automatic in-air turning device and turning method for precast bridge piers. It includes a boom, a first lifting trolley, a second lifting trolley, a first suspension rod, a second suspension rod and a tensioning structure; the first lifting trolley is used to lift the upper end of the precast pier; the second lifting trolley is used to lift the lower end of the precast pier; a first turning bracket is connected to the first suspension rod, and a first automatic buckle is arranged on the first turning bracket; a second turning bracket is connected to the second suspension rod, and a second automatic buckle is arranged on the second turning bracket; the tensioning structure is arranged on the second lifting trolley and is used to limit the sway of the second suspension rod, the second turning bracket and the second automatic buckle during the process of the second turning bracket clamping and disengaging from the precast pier. The turning device of the present application has a simple structure and is convenient to operate, greatly improving the turning efficiency of the precast pier.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly to an automatic in-air turning device and turning method for precast bridge piers. Background Art

[0002] With the gradual popularization of precast bridges in China, precast piers are widely used in bridge projects. During transportation, precast piers are usually transported horizontally and will be turned over after being transported to the construction site, that is, turned from the horizontal state to the vertical state for construction. At present, the turning-over schemes for precast piers generally adopt the sliding method and the rotating method. The sliding method means that during the turning-over process of the precast pier, the precast pier slides and the lifting equipment does not rotate but only lifts. The rotating method means that during the turning-over process of the precast pier, the lifting equipment rotates while lifting to adjust the lifting center of gravity.

[0003] When using the sliding method for hoisting, the precast pier will be vibrated during the sliding process and is extremely prone to the phenomenon of oblique pulling and slanting lifting, which is very unfavorable to the precast pier itself and the on-site safety. However, the sliding method has relatively low requirements for the mobility of the hoisting machinery and only requires one action of the lifting hook to rise. When using the rotating method for hoisting, the precast pier is less vibrated during the hoisting process and has higher production efficiency, but it also has higher requirements for the mobility performance of the lifting equipment. And both of the above two methods can only be applied to flat ground and are not applicable when the ground is uneven, or the site is the sea or a tidal flat. In fact, both of the above two methods have the following problems:

[0004] 1) The turning-over operation is difficult, time-consuming, and greatly affected by environmental and site factors;

[0005] 2) The wire rope is very likely to be inclined during the turning-over process of the pier column, affecting the service life of the wire rope;

[0006] 3) When the turning-over of the pier column is carried out on the ground, it causes great damage to the bottom of the column. When carried out in the air, it is dangerous, prone to oscillation, and a test of the energy and physical strength of personnel, with high labor intensity;

[0007] 4) The edge protection during the turning-over of the pier column is generally lacking, with great construction safety risks;

[0008] 5) The degree of automation is low and the labor cost of manual operation is high.

[0009] Therefore, it is very necessary to design a new turning-over method for precast piers to solve the problems existing in the existing turning-over methods. Summary of the Invention

[0010] The purpose of the present invention is to solve the deficiencies of the above background art and provide an automatic in-air turning device and turning method for precast bridge piers.

[0011] The technical solution of the present invention is as follows: An automatic in-air turning device for precast bridge piers, comprising,

[0012] A jib, the jib is a truss structure arranged horizontally along the X direction;

[0013] A first hoisting trolley, the first hoisting trolley is slidably connected to the jib along the X direction and is used for hoisting the upper end of the precast pier;

[0014] A second hoisting trolley, the second hoisting trolley is slidably connected to the jib along the X direction and is used for hoisting the lower end of the precast pier;

[0015] A first hanging rod, the first hanging rod is fixed at the lower end of the first suspension rope of the first hoisting trolley. A first turning support is connected to the first hanging rod. The first turning support is hingedly connected to the first hanging rod so as to be rotatable about the Y-axis. A first automatic buckle for clamping and fixing the upper part of the precast pier is arranged on the first turning support;

[0016] A second hanging rod, the second hanging rod is fixed at the lower end of the second suspension rope of the second hoisting trolley. A second turning support is connected to the second hanging rod. The second turning support is hingedly connected to the second hanging rod so as to be rotatable about the Y-axis. A second automatic buckle for clamping and fixing the lower part of the precast pier is arranged on the second turning support;

[0017] A tensioning structure, the tensioning structure is arranged on the second hoisting trolley and is used for restricting the swaying of the second hanging rod, the second turning support and the second automatic buckle during the process of the second turning support clamping and disengaging from the precast pier.

[0018] According to an automatic in-air turning device for precast bridge piers provided by the present application, the first hanging rod comprises,

[0019] A first base, the first base is fixed at the lower end of the first suspension rope;

[0020] A first connector, the upper end of the first connector is hingedly connected to the first base so as to be rotatable about the Y-axis;

[0021] A first support plate, the first support plate is hingedly connected to the lower end of the first connector so as to be rotatable about the X-axis.

[0022] According to an automatic in-air turning device for precast bridge piers provided by the present application, the upper end of the first turning support is hingedly connected to the first support plate so as to be rotatable about the Y-axis. The lower end of the first turning support is provided with a U-shaped opening for clamping both sides of the precast pier in the Y direction; The first automatic buckle comprises two groups of first telescopic motors arranged opposite to each other in the U-shaped opening; A first bolt arranged along the Y direction is arranged on the first telescopic motor; The first bolt is driven by the first telescopic motor to telescopically insert into the upper hanging hole on the side of the upper end of the precast pier along the Y direction.

[0023] A kind of automatic in-air turning device for precast bridge piers provided by the present application, the second suspension rod includes,

[0024] A second base, which is fixed at the lower end of the second suspension rope;

[0025] A second connector, the upper end of which is hingedly connected to the second base so as to be rotatable about the Y-axis;

[0026] A second support plate, the lower end of which is hingedly connected to the second connector so as to be rotatable about the X-axis.

[0027] A kind of automatic in-air turning device for precast bridge piers provided by the present application, the upper end of the second turning bracket is hingedly connected to the second support plate so as to be rotatable about the Y-axis, and a U-shaped opening for clamping the two sides in the Y-direction of the precast pier is arranged at the lower end of the second turning bracket; the second automatic buckle includes two groups of second telescopic motors arranged opposite to each other in the U-shaped opening; a second bolt arranged along the Y-direction is arranged on the second telescopic motor; the second bolt is driven by the second telescopic motor to telescopically enter the lower suspension hole at the side part of the lower end of the precast pier along the Y-direction.

[0028] A kind of automatic in-air turning device for precast bridge piers provided by the present application, a fixing frame is arranged on the second turning bracket; the fixing frame is a triangular bracket structure with the side fixed on the side of the second turning bracket facing the first hoisting trolley and the bottom closely attached to the side part of the precast pier.

[0029] A kind of automatic in-air turning device for precast bridge piers provided by the present application, the tensioning structure includes,

[0030] An upper bracket, which is a triangular bracket installed on the side of the second hoisting trolley facing the first hoisting trolley and extending outward along the X-direction;

[0031] A lower bracket, which is a triangular bracket installed on the side of the fixing frame facing away from the second turning bracket;

[0032] An electric hoist, which is installed on the upper bracket, and the electric hoist is fixedly connected with the lower bracket in a tensioned manner through a steel wire rope.

[0033] A kind of automatic in-air turning device for precast bridge piers provided by the present application, a slide rail along the X-direction is arranged at the upper end of the boom; a first pulley slidably connected to the slide rail is arranged at the lower end of the first hoisting trolley; a second pulley slidably connected to the slide rail is arranged at the lower end of the second hoisting trolley.

[0034] The present application also provides a turning method, which adopts the above-mentioned turning device and is carried out according to the following steps:

[0035] S1. Adjust the positions of the first lifting trolley and the second lifting trolley on the boom. After the first lifting trolley and the second lifting trolley are respectively aligned with the upper end and the lower end of the precast pier column placed horizontally below, lower the first lifting rope so that the first automatic buckle clamps the upper position of the precast pier column, and lower the second lifting rope so that the second automatic buckle clamps the lower position of the precast pier column;

[0036] S2. The first lifting trolley and the second lifting trolley vertically lift the precast pier column. After reaching the height required for turning over, keep the position of the second lifting trolley on the boom and maintain the length of the second lifting rope unchanged. The first lifting trolley continues to vertically lift the upper end of the precast pier column, and at the same time, the first lifting trolley moves along the X direction towards the second lifting trolley until the precast pier column is turned over to the vertical state;

[0037] S3. Disconnect the second automatic buckle from the precast pier column, and the tensioning structure tensions the second suspension rod. The first lifting trolley hoists the precast pier column to the construction position.

[0038] According to a turning-over method provided by the present application, in the step S3, the method for the tensioning structure to tension the second suspension rod includes: installing an upper bracket on the second lifting trolley, installing a lower bracket on the second turning-over bracket, the electric hoist on the upper bracket is connected to the lower bracket through a steel wire rope. During the process of connecting the second automatic buckle to the precast pier column and disconnecting the second automatic buckle from the precast pier column, the electric hoist tensions the steel wire rope so that the steel wire rope is always in a taut state.

[0039] The advantages of the present application are as follows: 1. The present turning-over device can realize the automatic turning-over operation of the precast pier column. The entire turning-over process is extremely simple, the turning-over operation efficiency of the precast pier column is extremely high, and during the entire turning-over process, the precast pier column has no vibration, the safety of the turning-over operation is extremely high, the turning-over construction is extremely stable, and the turning-over operation of the present application is completely based on the boom in the air for construction, not affected by the ground, and has a very wide application range;

[0040] 2. The first suspension rod of the present application includes a first base, a first connector and a first support plate. The first suspension rod is a bracket structure that can rotate along the X-axis and the Y-axis. During the process of the first lifting trolley hoisting the precast pier column, the first suspension rod can adaptively change the angle according to the change of the center of gravity of the precast pier column, so that the acting force applied by the first lifting rope can be efficiently transmitted, greatly improving the safety of hoisting;

[0041] 3. The structure of the first automatic buckle of the present application is extremely simple. The first automatic buckle drives the first bolt to insert into the upper suspension holes on both sides of the precast pier column through the first telescopic motor, and then the first suspension rod can be conveniently connected to the precast pier column. After the hoisting of the precast pier column is completed, the first telescopic bolt is withdrawn from the upper suspension hole to complete the disconnection of the first suspension rod from the precast pier column. The entire connection and disconnection process is extremely simple and the operation is extremely convenient, greatly reducing the labor cost;

[0042] 4. The second suspension rod of the present application includes a second base, a second connector and a second support plate. The second suspension rod is a bracket structure that can rotate along the X-axis and the Y-axis. During the process of the second lifting trolley lifting the prefabricated pier column, the second suspension rod can adaptively change the angle according to the change of the center of gravity of the prefabricated pier column, so that the force applied by the second lifting rope can be efficiently transmitted, which greatly improves the safety of the lifting;

[0043] 5. The second automatic buckle structure of the present application is extremely simple. The second automatic buckle drives the second pin to be inserted into the upper hanging holes on both sides of the prefabricated pier column through the second telescopic motor, so that the second hanging rod can be conveniently connected to the prefabricated pier column. After the turning operation of the prefabricated pier column is completed, the second telescopic pin is pulled out from the upper hanging hole to complete the separation of the second hanging rod from the prefabricated pier column. The whole connection and separation process is extremely simple and the operation is extremely convenient, which greatly reduces the labor cost.

[0044] 6. The present application provides a fixing frame on the second turning bracket, the bottom surface of which is always attached to the outside of the prefabricated pier column, and cooperates with the U-shaped structure of the second turning bracket to increase the contact area between the second turning bracket and the prefabricated pier column, and the connection stability between the second turning bracket and the prefabricated pier column is enhanced. The prefabricated pier column does not vibrate during the turning process, and the safety is excellent;

[0045] 7. The tensioning structure of the present application includes an upper bracket, a lower bracket and an electric hoist. The electric hoist tightens the wire rope so that the second suspension rod and the second turning bracket are stably connected to the second suspension rope and the wire rope, thereby avoiding the shaking of the second suspension rod and the second turning bracket, effectively avoiding the friction and collision of the suspension rope, reducing the damage of the suspension rope, and effectively avoiding the vibration of the prefabricated pier column during the turning process;

[0046] 8. The first lifting trolley and the second lifting trolley of the present application are slidably connected to the slide rail through the first pulley and the second pulley, and an automatically controlled motor structure can be configured to drive the movement of the first pulley and the second pulley to achieve linear movement of the first lifting trolley and the second lifting trolley, which greatly improves the construction efficiency and reduces the construction difficulty;

[0047] 9. The turning method of the prefabricated pier column of the present application is extremely simple, with a high degree of automation and a high overall construction efficiency. The turning operation of the prefabricated pier column can be quickly performed without a large number of construction workers. The prefabricated pier column does not vibrate during the turning process, and has excellent safety. The entire construction process is stable and smooth, and has great promotion value.

[0048] 10. During the turnover process of the precast pier column and after the turnover is completed, the second suspension rod and the second turnover support of this application will be tensioned to avoid sliding during this process, effectively reducing the damage of the suspension rope, improving the construction safety, and reducing the oscillation of the precast pier column during the turnover process.

[0049] The turnover device of this application has a simple structure and is easy to operate, greatly improving the turnover efficiency of the precast pier column. Moreover, the entire turnover construction process is extremely stable and smooth, without oscillation of the precast pier column, and has extremely high safety, with great popularization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 : Front view of the turnover device of this application;

[0051] Figure 2 : Side view of the first suspension rod and the first turnover support of this application;

[0052] Figure 3 : Front view of the first suspension rod and the first turnover support of this application;

[0053] Figure 4 : Side view of the second suspension rod and the second turnover support of this application;

[0054] Figure 5 : Front view of the second suspension rod and the second turnover support of this application;

[0055] Figure 6 : Schematic diagram of the installation structure of the electric hoist of this application;

[0056] Figure 7 : Schematic diagram of hoisting the precast pier column of this application to the turnover height;

[0057] Figure 8 : Schematic diagram of the precast pier column of this application starting to turnover;

[0058] Figure 9 : Schematic diagram of the precast pier column of this application being flipped to the vertical state;

[0059] Figure 10 : Schematic diagram of the second turnover support of this application being disengaged from the precast pier column;

[0060] Wherein: 1 - boom;

[0061] 11 - first lifting trolley; 12 - first suspension rope; 13 - first turnover support; 14 - first base; 15 - first connector; 16 - first support plate; 17 - first telescopic motor; 18 - first bolt; 19 - first pulley;

[0062] 21 - Second lifting trolley; 22 - Second suspension rope; 23 - Second turning bracket; 24 - Second base; 25 - Second connector; 26 - Second support plate; 27 - Second telescopic motor; 28 - Second bolt; 29 - Fixing frame; 210 - Upper bracket; 211 - Lower bracket; 212 - Electric hoist; 213 - Steel wire rope; 214 - Second pulley;

[0063] 2 - Slide rail. Detailed implementation mode

[0064] The embodiments of the present invention will be described in detail below, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0066] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0068] This application relates to an automatic in-air turning device for precast bridge piers, which is used to turn the precast bridge piers so that the horizontally transported precast bridge piers are flipped to the vertical state, facilitating subsequent installation construction. During the turning process of the precast bridge piers, two sets of lifting equipment are used in cooperation. One set of lifting equipment applies a vertical force to the upper end of the precast bridge pier, and the other set of lifting equipment applies a vertical force to the lower end of the precast bridge pier, and they cooperate with each other to flip the horizontally placed precast bridge pier to the vertical state.

[0069] Specifically, the turning device of this application includes a boom 1, a first lifting trolley 11, a second lifting trolley 21, a first suspension rod, a second suspension rod and a tensioning structure, as Figures 1 to 10As shown, the boom 1 is a truss structure horizontally arranged along the X direction. The boom 1 is a truss structure suspended above the precast pier column. The turning operation of the precast pier column is realized based on the boom 1. The whole operation has no direct relation with the ground and is not interfered by ground factors, and the applicable range is extremely wide.

[0070] The first lifting trolley 11 is slidably connected to the boom 1 along the X direction (as Figure 1 shown, the X direction refers to the left - right direction in the figure), and is used to lift the upper end of the precast pier column. The first lifting trolley 11 itself can slide along the boom 1. The movement of the first lifting trolley 11 in the X direction is to cooperate with the position of the precast pier column. A first lifting rope 12 is arranged on the first lifting trolley 11, and the first lifting rope 12 is connected to the precast pier column for hoisting the precast pier column.

[0071] The second lifting trolley 21 is slidably connected to the boom 1 along the X direction. The second lifting trolley 21 and the first lifting trolley 11 are arranged at intervals along the X direction on the boom 1. The second lifting trolley 21 is at the rear and the first lifting trolley 11 is at the front, corresponding to the upper and lower ends of the precast pier column respectively. The second lifting trolley 21 is used to lift the lower end of the precast pier column. A second lifting rope 22 is arranged on the second lifting trolley 21, and the second lifting rope 22 is connected to the precast pier column for hoisting the precast pier column.

[0072] A slide rail 2 along the X direction is arranged at the upper end of the boom 1. A first pulley 19 which is slidably connected to the slide rail 2 is arranged at the lower end of the first lifting trolley 11. A second pulley 214 which is slidably connected to the slide rail 2 is arranged at the lower end of the second lifting trolley 21. The first pulley 19 and the second pulley 214 can be driven by a motor, so that the movement of the first lifting trolley 11 and the second lifting trolley 21 along the X direction can be controlled through a control system.

[0073] The first lifting rod is fixed at the lower end of the first lifting rope 12 of the first lifting trolley 11. A first turning support 13 is connected to the first lifting rod. The first turning support 13 is hingedly connected to the first lifting rod and can rotate along the Y - axis. A first automatic buckle for clamping and fixing the upper end part of the precast pier column is arranged on the first turning support 13. The first automatic buckle is a structure directly connected to the upper end position of the precast pier column, and the first automatic buckle can automatically clamp, fix and release the precast pier column. The matching structure of the first turning support 13 and the first lifting rod is convenient for the connection between the first lifting rope 12 and the precast pier column, adapts to the change of the center - of - gravity force during the turning process of the precast pier column, and ensures that the acting force exerted by the first lifting rope 12 on the precast pier column is stable.

[0074] The second suspension rod is fixed to the lower end of the second suspension rope 22 of the second hoisting trolley 21. A second turning support 23 is connected to the second suspension rod. The second turning support 23 is hingedly connected to the second suspension rod and can rotate along the Y-axis. A second automatic buckle for clamping and fixing the lower part of the precast pier is provided on the second turning support 23. Similarly, the second automatic buckle is a structure directly connected to the lower position of the precast pier, and the second automatic buckle can automatically clamp, fix and release the precast pier. The matching structure of the second turning support 23 and the second suspension rod facilitates the connection between the second suspension rope 2 and the precast pier, adapts to the change of the center-of-gravity force during the turning process of the precast pier, and ensures that the acting force applied by the second suspension rope 22 to the precast pier is stable.

[0075] A tensioning structure is arranged on the second hoisting trolley 21 to limit the sway of the second suspension rod, the second turning support 23 and the second automatic buckle during the process of the second turning support 23 clamping and disengaging from the precast pier. The tensioning structure restricts the second suspension rod, the second turning support 23 and the second automatic buckle to avoid swaying before and after the completion of the turning process of the precast pier. The tensioning structure can avoid the oscillation during the turning process of the precast pier, reduce the damage of the second suspension rope 22, and avoid the collision of the second suspension rod, the second turning support 23 and the second automatic buckle.

[0076] As Figures 7 to 10 shown, the specific steps for turning the precast pier are as follows:

[0077] S1. Adjust the positions of the first hoisting trolley 11 and the second hoisting trolley 21 on the boom 1. After the first hoisting trolley 11 and the second hoisting trolley 21 are respectively aligned with the upper end and the lower end of the horizontally placed precast pier below, lower the first suspension rope 12 so that the first automatic buckle clamps the upper position of the precast pier, and lower the second suspension rope 22 so that the second automatic buckle clamps the lower position of the precast pier.

[0078] S2. The first hoisting trolley 11 and the second hoisting trolley 21 vertically lift the precast pier. After reaching the height required for turning, keep the position of the second hoisting trolley 21 on the boom 1 and maintain the length of the second suspension rope 22 unchanged. The first hoisting trolley 11 continues to vertically lift the upper end of the precast pier, and at the same time, the first hoisting trolley 11 moves along the X-axis towards the second hoisting trolley 21 until the precast pier is turned to the vertical state.

[0079] S3. Disconnect the second automatic buckle from the precast pier, the tensioning structure tensions the second suspension rod, and the first hoisting trolley hoists the precast pier to the construction position.

[0080] In some embodiments of the present application, this embodiment optimizes the above-mentioned first suspension rod structure. Specifically, as Figures 2 to 3As shown in the figure, the first suspension rod of this embodiment includes a first base 14, a first connector 15, and a first support plate 16. The first base 14 is fixed to the lower end of the first suspension rope 12. In fact, the lower end of the first suspension rope 12 is fixed to the first base 14. The upper end of the first connector 15 is hingedly connected to the first base 14 so as to be rotatable about the Y-axis, and the first support plate 16 is hingedly connected to the lower end of the first connector 15 so as to be rotatable about the X-axis.

[0081] Actually, the upper half of the first suspension rod can perform adaptive adjustment by rotating about the Y-axis, and the lower half can perform adaptive adjustment by rotating about the X-axis. This adjustment method of the first suspension rod is to adapt to the change of the center of gravity during the overturning process of the precast pier column, avoid the deviation of the force angle between the first suspension rope 12 and the connection structure of the precast pier column, and enable the first suspension rope 12 to always stably lift the precast pier column.

[0082] Adjusting cylinders are provided on the first base 14, the first connector 15, and the first support plate 16. The angle deviation between adjacent two components is adjusted by the adjusting cylinders, which can cooperate with the control system and monitoring equipment to adjust the hoisting process and realize intelligent and automatic operation control.

[0083] Similarly, the structure of the second suspension rod is similar to that of the first suspension rod. As Figures 4 to 5 shown, the second suspension rod includes a second base 24, a second connector 25, and a second support plate 26. The second base 24 is fixed to the lower end of the second suspension rope 22. The upper end of the second connector 25 is hingedly connected to the second base 24 so as to be rotatable about the Y-axis, and the second support plate 26 is hingedly connected to the lower end of the second connector 25 so as to be rotatable about the X-axis.

[0084] Actually, the upper half of the second suspension rod can perform adaptive adjustment by rotating about the Y-axis, and the lower half can perform adaptive adjustment by rotating about the X-axis. This adjustment method of the second suspension rod is to adapt to the change of the center of gravity during the overturning process of the precast pier column, avoid the deviation of the force angle between the second suspension rope 22 and the connection structure of the precast pier column, and enable the second suspension rope 22 to always stably lift the precast pier column.

[0085] Adjusting cylinders are provided on the second base 24, the second connector 25, and the second support plate 26. The angle deviation between adjacent two components is adjusted by the adjusting cylinders, which can cooperate with the control system and monitoring equipment to adjust the hoisting process and realize intelligent and automatic operation control.

[0086] In a further embodiment of the present application, this embodiment optimizes the above-mentioned first automatic buckle structure. Specifically, as Figures 2 to 3As shown, the upper end of the first turning bracket 13 in this embodiment is hingedly connected to the first support plate 16 so as to be rotatable about the Y-axis. The lower end of the first turning bracket 13 is provided with a U-shaped opening that clamps the two sides of the precast pier column in the Y-direction, and the U-shaped opening at the lower end of the first turning bracket 13 just clamps the two sides of the precast pier column in the Y-direction.

[0087] The first automatic buckle includes two groups of first telescopic motors 17 arranged oppositely in pairs within the U-shaped opening. A first bolt 18 arranged along the Y-direction is provided on the first telescopic motor 17, and the first bolt 18 is driven by the first telescopic motor 17 to telescopically insert into the upper hanging holes on the side parts of the upper end of the precast pier column along the Y-direction.

[0088] During use, the first telescopic motor 17 drives the first bolt 18 to contract away from the first bolt 18 on the other side, and then the first turning bracket 13 is moved so that the U-shaped opening of the first turning bracket 13 is clamped to the two sides of the precast pier column in the Y-direction. The first telescopic motor 17 drives the first bolt 18 to extend towards the first bolt 18 on the other side, and the first bolt 18 is inserted into the upper hanging holes on the two sides of the precast pier column in the Y-direction, thus completing the connection and fixation of the first turning bracket 13 and the precast pier column; when the hoisting of the precast pier column is completed, the first telescopic motor 17 drives the first bolt 18 to contract away from the first bolt 18 on the other side, and the first bolt 18 is withdrawn from the upper hanging hole, completing the detachment of the first turning bracket 13 and the precast pier column.

[0089] Similarly, as Figures 4 to 5 shown, the upper end of the second turning bracket 23 is hingedly connected to the second support plate 26 so as to be rotatable about the Y-axis. The lower end of the second turning bracket 23 is provided with a U-shaped opening that clamps the two sides of the precast pier column in the Y-direction, and the U-shaped opening at the lower end of the second turning bracket 23 just clamps the two sides of the precast pier column in the Y-direction.

[0090] The second automatic buckle includes two groups of second telescopic motors 27 arranged oppositely in pairs within the U-shaped opening. A second bolt 28 arranged along the Y-direction is provided on the second telescopic motor 27, and the second bolt 28 is driven by the second telescopic motor 27 to telescopically enter the lower hanging holes on the side parts of the lower end of the precast pier column along the Y-direction.

[0091] During use, the second telescopic motor 27 drives the second bolt 28 to contract away from the second bolt 28 on the other side, and then the second turning bracket 23 is moved so that the U-shaped opening of the second turning bracket 23 is clamped to the two sides of the precast pier column in the Y-direction. The second telescopic motor 27 drives the second bolt 28 to extend towards the second bolt 28 on the other side, and the second bolt 28 is inserted into the upper hanging holes on the two sides of the precast pier column in the Y-direction, thus completing the connection and fixation of the second turning bracket 23 and the precast pier column; when the turning operation of the precast pier column is completed, the second telescopic motor 27 drives the second bolt 28 to contract away from the second bolt 28 on the other side, and the second bolt 28 is withdrawn from the upper hanging hole, completing the detachment of the second turning bracket 23 and the precast pier column.

[0092] In some embodiments of the present application, as Figure 5 shown, in this embodiment, a fixing frame 29 is provided on the second turning support 23. The fixing frame 29 is a triangular support structure that is fixed to the side of the second turning support 23 facing the first hoisting trolley 11 on the side and whose bottom surface is closely attached to the side of the precast pier column.

[0093] The fixing frame 29 is a right-angled triangular frame. One right-angled side of the fixing frame 29 is fixed to the side of the second turning support 23, and the other right-angled side is closely attached to the side of the precast pier column during the hoisting of the precast pier column. During the connection of the second turning support 23 with the precast pier column, the fixing frame 29 can increase the contact area between the second turning support 23 and the precast pier column, improve the connection stability between the two, and prevent shaking during the hoisting process.

[0094] In some other embodiments of the present application, the above-mentioned tensioning structure is optimized. Specifically, as Figures 5 to 6 shown, the tensioning structure includes an upper support 210, a lower support 211, and an electric hoist 212. The upper support 210 is a triangular support installed on the side of the second hoisting trolley 21 facing the first hoisting trolley 11 and extending outward along the X direction. The lower support 211 is a triangular support installed on the side of the fixing frame 29 facing away from the second turning support 23. Both the upper support 210 and the lower support 211 are triangular frames extending towards the first hoisting trolley 11. Such a setting is to reserve a distance from the second lifting rope 22.

[0095] The electric hoist 212 is installed on the upper support 210, and the electric hoist 212 is fixedly connected to the lower support 211 in a tensioned manner through a steel wire rope 213.

[0096] During actual use, when the second lifting rope 22 vertically tensions the precast pier column, the electric hoist 212 tensions the steel wire rope 213, so that the steel wire rope 213 between the upper support 210 and the lower support 211 is in a tensioned state. After the turning operation of the precast pier column is completed and the connection between the second automatic buckle and the precast pier column is released, the electric hoist 212 maintains the tensioned state of the steel wire rope 213, so that the second suspension rod, the second turning support 23, and the second automatic buckle are stably connected to the lower ends of the second lifting rope 22 and the steel wire rope 213, preventing shaking of these structural components, reducing wear of the second lifting rope 22. In addition, there is a gap between the second lifting rope 22 and the steel wire rope 213, and the two will not collide and rub against each other, improving the service life of the second lifting rope 22 and the steel wire rope 213.

[0097] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic in-air turning device for precast bridge piers, characterized in that: including, a boom (1), the boom (1) being a truss structure horizontally arranged along the X direction; a first hoisting trolley (11), the first hoisting trolley (11) being slidably connected to the boom (1) along the X direction for hoisting the upper end of a precast pier column; a second hoisting trolley (21), the second hoisting trolley (21) being slidably connected to the boom (1) along the X direction for hoisting the lower end of a precast pier column; a first suspension rod, the first suspension rod being fixed to the lower end of a first suspension rope (12) of the first hoisting trolley (11), a first turning bracket (13) being connected to the first suspension rod, the first turning bracket (13) being hingedly connected to the first suspension rod so as to be rotatable about the Y-axis, and a first automatic buckle for clamping and fixing the upper end part of the precast pier column being arranged on the first turning bracket (13); a second suspension rod, the second suspension rod being fixed to the lower end of a second suspension rope (22) of the second hoisting trolley (21), a second turning bracket (23) being connected to the second suspension rod, the second turning bracket (23) being hingedly connected to the second suspension rod so as to be rotatable about the Y-axis, and a second automatic buckle for clamping and fixing the lower end part of the precast pier column being arranged on the second turning bracket (23); a tensioning structure, the tensioning structure being arranged on the second hoisting trolley (21) for restricting the swaying of the second suspension rod, the second turning bracket (23) and the second automatic buckle during the process of the second turning bracket (23) clamping and disengaging from the precast pier column; a fixing bracket (29) being arranged on the second turning bracket (23); the fixing bracket (29) being a triangular bracket structure with its side fixed to the side of the second turning bracket (23) facing the first hoisting trolley (11) and its bottom closely fitting the side part of the precast pier column; the tensioning structure includes, an upper bracket (210), the upper bracket (210) being a triangular bracket installed on the side of the second hoisting trolley (21) facing the first hoisting trolley (11) and extending outward along the X direction; a lower bracket (211), the lower bracket (211) being a triangular bracket installed on the side of the fixing bracket (29) facing away from the second turning bracket (23); a electric hoist (212), the electric hoist (212) being installed on the upper bracket (210), and the electric hoist (212) being tensioned and fixedly connected to the lower bracket (211) through a steel wire rope (213).

2. The automatic in-air turning device for precast bridge piers according to claim 1, wherein: the first suspension rod includes, a first base (14), the first base (14) being fixed to the lower end of the first suspension rope (12); a first connector (15), the upper end of the first connector (15) being hingedly connected to the first base (14) so as to be rotatable about the Y-axis; a first support plate (16), the first support plate (16) being hingedly connected to the lower end of the first connector (15) so as to be rotatable about the X-axis.

3. The automatic in-air turning device for precast bridge piers according to claim 2, characterized in that: The upper end of the first turning support (13) is hingedly connected to the first support plate (16) so as to be rotatable about the Y-axis. The lower end of the first turning support (13) is provided with a U-shaped opening that clamps the two sides of the precast pier column in the Y-direction. The first automatic buckle includes two groups of first telescopic motors (17) arranged opposite to each other within the U-shaped opening. The first telescopic motor (17) is provided with a first bolt (18) arranged in the Y-direction. The first bolt (18) is driven by the first telescopic motor (17) to telescopically insert into the upper hanging hole on the side of the upper end of the precast pier column in the Y-direction.

4. The automatic in-air turning device for precast bridge piers according to claim 2, wherein: The second suspension rod includes a second base (24), and the second base (24) is fixed to the lower end of the second suspension rope (22); a second connector (25), and the upper end of the second connector (25) is hingedly connected to the second base (24) so as to be rotatable about the Y-axis; a second support plate (26), and the second support plate (26) is hingedly connected to the lower end of the second connector (25) so as to be rotatable about the X-axis.

5. The automatic in-air turning device for precast bridge piers according to claim 4, wherein: The upper end of the second turning support (23) is hingedly connected to the second support plate (26) so as to be rotatable about the Y-axis. The lower end of the second turning support (23) is provided with a U-shaped opening that clamps the two sides of the precast pier column in the Y-direction. The second automatic buckle includes two groups of second telescopic motors (27) arranged opposite to each other within the U-shaped opening. The second telescopic motor (27) is provided with a second bolt (28) arranged in the Y-direction. The second bolt (28) is driven by the second telescopic motor (27) to telescopically enter the lower hanging hole on the side of the lower end of the precast pier column in the Y-direction.

6. The automatic in-air turning device for precast bridge piers according to claim 1, wherein: A slide rail (2) in the X-direction is arranged at the upper end of the jib (1). A first pulley (19) that is slidably connected to the slide rail (2) is provided at the lower end of the first hoisting trolley (11). A second pulley (214) that is slidably connected to the slide rail (2) is provided at the lower end of the second hoisting trolley (21).

7. A turning-over method, characterized in that: An automatic in-air turning device for a bridge precast pier column as described in any one of claims 1 to 6 is adopted and is carried out according to the following steps: S1. Adjust the positions of the first hoisting trolley (11) and the second hoisting trolley (21) on the jib (1). After the first hoisting trolley (11) and the second hoisting trolley (21) are respectively aligned with the upper end and the lower end of the precast pier column placed horizontally below, lower the first suspension rope (12) so that the first automatic buckle clamps the upper end position of the precast pier column, and lower the second suspension rope (22) so that the second automatic buckle clamps the lower end position of the precast pier column. S2. The first hoisting trolley (11) and the second hoisting trolley (21) vertically lift the precast pier column. After reaching the height required for turning, keep the position of the second hoisting trolley (21) on the jib (1) and maintain the length of the second suspension rope (22) unchanged. The first hoisting trolley (11) continues to vertically lift the upper end of the precast pier column, and at the same time, the first hoisting trolley (11) moves along the X-direction towards the side of the second hoisting trolley (21) until the precast pier column is turned to a vertical state. S3. Disconnect the connection between the second automatic buckle and the precast pier column, and the tensioning structure tensions the second suspension rod. The first hoisting trolley hoists the precast pier column to the construction position.

8. The turning method according to claim 7, characterized in that: In the step S3, the method for the tensioning structure to tension the second suspension rod includes: installing an upper bracket (210) on the second hoisting trolley (21), installing a lower bracket (211) on the second turning-over bracket (23), connecting the electric hoist (212) on the upper bracket (210) to the lower bracket (211) through a steel wire rope (213), and during the process of connecting the second automatic buckle to the precast pier column and disconnecting the second automatic buckle from the precast pier column, the electric hoist (212) tensions the steel wire rope (213) so that the steel wire rope (213) is always in a taut state.

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