Positioning device for bridge pier column hoisting

Abstract

The invention provides a positioning device for bridge pier column hoisting, and belongs to the technical field of pier column construction. Comprising a foundation and a positioning auxiliary mechanism, a reinforcement cage is arranged at the top of the foundation, a plurality of stand columns are arranged in the reinforcement cage at equal intervals, the stand columns are arranged with the axis of the reinforcement cage as the center, and the positioning auxiliary mechanism is installed at the tops of the stand columns. According to the positioning device for bridge pier column hoisting, the stand column is installed in the reinforcement cage, the positioning auxiliary mechanism is installed on the stand column, and a steel mold is prevented from being downwards hoisted to make contact with the top of the reinforcement cage through the top cover; then the air cylinder is started, the positioning wheel is attached to the inner wall of the steel mold, the steel mold is positioned and hoisted, and the steel mold can be prevented from making contact with the reinforcement cage in the whole process; in the whole process, a worker only needs to climb to the reinforcement cage for operation when the positioning auxiliary mechanism is mounted and dismounted, the worker does not need to support the steel mold in the hoisting process, and the safety of the hoisting process is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pier construction, and particularly relates to a positioning device for hoisting of a bridge pier. BACKGROUND

[0002] The formwork construction technology is a common type of bridge construction technology, mainly composed of early design, mid-term formwork and support work processes and late-stage introduction of steel binding work. The success or failure of the formwork construction technology will directly affect the stability of the structure of the bridge pier, and also has a certain influence on the smoothness of the appearance of the pier. Therefore, good construction application of the formwork technology is the key link of the bridge pier construction technology. Since there are differences between the south force and the north force of the bridge pier structure in China, it is necessary to conduct on-site research on the environmental factors of the bridge engineering before the formwork technology, from the topography and geomorphology to the hydrogeology, which are the objects of investigation of the relevant staff. Good exploration work can ensure the construction of the formwork technology without any loss, so as to ensure the quality problem of the appearance of the bridge pier.

[0003] A positioning device for hoisting of a bridge hollow pier is provided in Chinese Patent No. CN221919029U. The pier enters the positioning device and contacts the buffer pad, which can greatly alleviate the impact of the pier and make the pier no longer shake, facilitating the positioning of the clamping plate. Then, under the drive of the telescopic rod, the clamping plates on both sides clamp and position the pier, aligning it with the pier support seat. Two telescopic rods are provided on each clamping frame to improve the positioning ability of the pier. During the descent of the pier, it is ensured that the pier moves in the vertical direction. The existing bridge pier hoisting mostly adopts hoisting of a steel mold on a steel reinforcement cage, and then pouring concrete to make a pier. The above-mentioned device is installed on the top of the foundation, which causes the device to only be able to position when the bottom of the steel mold is close to the foundation. When the steel mold is hoisted on the outside of the steel reinforcement cage, it is easy to collide with the top and side wall of the steel reinforcement cage. In reality, workers often need to go up to the steel reinforcement cage to hold it, which is dangerous and inconvenient for automatic positioning of the hoisting of the steel mold. SUMMARY

[0004] In order to solve the problem that the steel mold cannot avoid collision with the reinforcement cage during hoisting in the prior art, the application provides a positioning device for hoisting of a bridge pier column, which adopts a positioning auxiliary mechanism combined with a stand to avoid collision between the steel mold and the reinforcement cage, and the specific technical scheme is as follows: a positioning device for hoisting of a bridge pier column, comprising: a foundation and a positioning auxiliary mechanism, the top of the foundation is provided with a reinforcement cage, a plurality of stands are equidistantly arranged in the reinforcement cage, the plurality of stands are arranged around the axis of the reinforcement cage, and the top of the plurality of stands is provided with the positioning auxiliary mechanism; the positioning auxiliary mechanism comprises: an auxiliary mounting table, a positioning part and a top cover, the top of the plurality of stands is provided with the auxiliary mounting table, the bottom of the auxiliary mounting table is provided with the positioning part, and the top of the auxiliary mounting table is provided with the top cover, and the cross section of the top cover is matched with the cross section of the reinforcement cage.

[0005] Preferably, a plurality of connecting arms are equidistantly arranged on the side wall of the auxiliary mounting table, the number of the connecting arms is the same as that of the stands, the bottom of the connecting arm is provided with a base, the base corresponds to the stand one by one, and a connecting and fixing part is arranged between the base and the stand.

[0006] Preferably, the connecting and fixing part comprises: a screw rod, a limiting ring, an internal thread bracket and a locking nut, the top of the stand is provided with the screw rod, the limiting ring is fixedly sleeved on the outer wall between the stand and the screw rod, the top of the limiting ring is provided with the internal thread bracket, the internal thread bracket is threadedly connected with the screw rod, and the internal thread bracket is used for supporting the base; and the surface of the screw rod is threadedly provided with the locking nut, and the locking nut is used for fixing the base.

[0007] Preferably, the top of the base is provided with a plug hole matched with the screw rod.

[0008] Preferably, a plurality of mounting grooves are equidistantly arranged on the outer wall of the auxiliary mounting table, the number of the mounting grooves is the same as that of the connecting arms, the mounting grooves correspond to the connecting arms one by one, the top of the connecting arm is inserted into the mounting groove, and the connecting arm is fixedly installed in the mounting groove through a fixed pin.

[0009] Preferably, the positioning part comprises: a connecting table, a fixed plate, a connecting box, an internal sliding box, a mounting seat and a positioning wheel, the bottom of the auxiliary mounting table is provided with the connecting table, a plurality of fixed plates are equidistantly arranged on the side wall of the connecting table, the fixed plate is fixedly provided with the connecting box, the number of the connecting box is the same as that of the connecting arm, the connecting box and the connecting arm are staggered arranged, the internal sliding box is slidably connected in the connecting box, the extension end of the internal sliding box away from the fixed plate extends out of the connecting box, the extension end of the internal sliding box is fixedly provided with the mounting seat, and the mounting seat is rotationally connected with the positioning wheel.

[0010] Preferably, the auxiliary mounting table is connected with the connecting table through a first flange connector, and the auxiliary mounting table is connected with the top cover through a second flange connector.

[0011] Preferably, the connecting box is fixedly provided with a mounting connecting plate, and a cylinder is fixedly provided on the mounting connecting plate, and an output end of the cylinder is connected with the inner sliding box.

[0012] Preferably, the cylinder is respectively provided with an exhaust pipe joint and an air inlet pipe joint, and the connecting box is provided with a partition joint.

[0013] In addition, the positioning device for hoisting the bridge pier column in the above technical solution can further have the following features: a limiting block is fixedly provided on the inner wall of the connecting box, and a sliding block is fixedly provided on the outer wall of the inner sliding box.

[0014] In the above technical solution, the sliding block is in sliding fit with the inner wall of the connecting box.

[0015] Compared with the prior art, the positioning device for hoisting the bridge pier column has the following beneficial effects: 1. The positioning device for hoisting the bridge pier column can avoid the contact between the steel mold and the steel reinforcement cage during the hoisting process by installing a stand in the steel reinforcement cage, installing a positioning auxiliary mechanism on the stand, and avoiding the contact between the steel mold and the top of the steel reinforcement cage by the top cover. Then, the positioning wheel is in fit with the inner wall of the steel mold by starting the cylinder, and the steel mold is positioned and hoisted, so that the contact between the steel mold and the steel reinforcement cage can be avoided during the whole hoisting process. Only when the positioning auxiliary mechanism is installed and dismounted, the worker needs to work on the steel reinforcement cage, and the worker does not need to support the steel mold during the hoisting process, so that the safety of the hoisting process is improved. 2. The positioning device for hoisting the bridge pier column can ensure the stability of the positioning auxiliary mechanism during the positioning process by pre-placing an inner threaded seat on the screw rod to support the base, and then pressing the base on the inner threaded seat by the locking nut, so that the positioning auxiliary mechanism is not prone to inaccurate positioning of the steel mold due to unstable installation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure diagram of the steel reinforcement cage and the positioning auxiliary mechanism is provided. Figure 2 The structure diagram of the auxiliary mounting table is provided. Figure 3 The structure diagram of the positioning component is provided. Figure 4 The explosion structure diagram of the connecting and fixing component is provided. Figure 5A cross-sectional view of the connection box provided by the present application is shown in the figure; Wherein, Figures 1 to 5 The reference signs in the figure and the component names are as follows: 1, base, 2, reinforcement cage, 3, stand, 4, auxiliary mounting table, 5, positioning component, 6, top cover, 7, connecting arm, 8, connecting fixing component, 9, first flange connector, 10, second flange connector, 11, base, 12, insertion hole, 13, mounting connecting plate, 14, air cylinder, 15, limiting block, 16, sliding block, 17, exhaust pipe joint, 18, air inlet pipe joint, 19, partition joint, 31, screw rod, 32, limiting ring, 33, internally threaded holder, 34, locking nut, 41, mounting groove, 42, fixing pin, 51, connecting table, 52, fixing plate, 53, connecting box, 54, inner sliding box, 55, mounting seat, 56, positioning wheel. DETAILED DESCRIPTION

[0017] The specific implementation cases and the accompanying Figures 1-5 The present application is further described, but the present application is not limited to these embodiments, and the present application provides a technical solution: a positioning device for hoisting a bridge pier column, comprising: a base 1 and a positioning auxiliary mechanism, the top of the base 1 is provided with a reinforcement cage 2, and the reinforcement cage 2 is connected with the base reinforcement at the top of the base 1 by welding; four stands 3 are equidistantly arranged in the inside of the reinforcement cage 2, the bottom of the stand 3 is fixed on the base 1 by bolts, and an anti-inclination support rod is arranged between the stand 3 and the base 1 to avoid the shaking of the stand 3; the top of the stand 3 extends over the top of the reinforcement cage 2, the four stands 3 are arranged with the axis of the reinforcement cage 2 as the center, and the top of the four stands 3 is provided with the positioning auxiliary mechanism; The positioning auxiliary mechanism comprises: an auxiliary mounting table 4, a positioning component 5 and a top cover 6, the top of the four stands 3 is provided with the auxiliary mounting table 4, the bottom of the auxiliary mounting table 4 is provided with the positioning component 5, and the top of the auxiliary mounting table 4 is provided with the top cover 6, the top surface of the top cover 6 is an arc surface structure, and the cross section of the top cover 6 is not less than the cross section of the reinforcement cage 2; when hoisting the steel mold is lowered, the steel mold will first contact the top cover 6, and will automatically slide downward due to the arc surface structure of the top cover 6, so as to sleeve the steel mold outside the reinforcement cage 2.

[0018] As a preferred solution, further, four connecting arms 7 are equidistantly arranged on the side wall of the auxiliary mounting table 4, the number of the connecting arms 7 is the same as that of the stands 3, the bottom of the connecting arm 7 is welded with a base 11, the base 11 corresponds to the stand 3 one by one, and a connecting fixing component 8 is arranged between the base 11 and the stand 3.

[0019] As a preferred scheme, further, the connecting fixing component 8 comprises a screw rod 31, a limiting ring 32, an internally-threaded bracket 33 and a locking nut 34, the screw rod 31 is welded and installed at the top of the stand column 3, the limiting ring 32 is welded and installed on the outer wall of the stand column 3, the top surface of the limiting ring 32 is flush with the top surface of the stand column 3, the internally-threaded bracket 33 is arranged at the top of the limiting ring 32, the internally-threaded bracket 33 is threadedly connected with the screw rod 31, when the internally-threaded bracket 33 is installed, the internally-threaded bracket 33 is rotated and screwed into the top of the screw rod 31 until the internally-threaded bracket 33 is attached to and supported by the limiting ring 32; the internally-threaded bracket 33 is used for supporting the base 11; the locking nut 34 is threadedly installed on the surface of the screw rod 31, the locking nut 34 is also rotated and screwed into the top end of the screw rod 31, the locking nut 34 is used for fixing the base 11, and the locking nut 34 presses the base 11 against the internally-threaded bracket 33; when installed, the internally-threaded bracket 33, the base 11 and the locking nut 34 are installed from top to bottom in sequence.

[0020] As a preferred scheme, further, the top of the base 11 is provided with a bushing 12, the bushing 12 is matched with the screw rod 31, and the cross-sectional size of the bushing 12 is not less than the cross-sectional size of the screw rod 31.

[0021] As a preferred scheme, further, four installation grooves 41 are equidistantly arranged on the outer wall of the auxiliary installation table 4, the number of the installation grooves 41 is the same as that of the connecting arms 7, the installation grooves 41 correspond to the connecting arms 7 one by one, the top of the connecting arm 7 is inserted into the installation groove 41, the connecting arm 7 is fixedly installed in the installation groove 41 through a fixing pin 42, the top of the connecting arm 7 is provided with an installation hole matched with the fixing pin 42, and the fixing pin 42 passes through the installation hole to fixedly install the connecting arm 7.

[0022] As a preferred scheme, further, the positioning component 5 comprises a connecting table 51, a fixing plate 52, a connecting box 53, an inner sliding box 54, a mounting seat 55 and a positioning wheel 56, the connecting table 51 is installed at the bottom of the auxiliary installation table 4, four fixing plates 52 are equidistantly installed on the side wall of the connecting table 51, the fixing plates 52 are installed on the connecting table 51 through screws, the connecting box 53 is fixedly installed on the fixing plate 52, the connecting box 53 is a hollow structure, the number of the connecting box 53 is the same as that of the connecting arms 7, the connecting box 53 and the connecting arms 7 are staggered, and each connecting box 53 passes between two connecting arms 7; the inner sliding box 54 is slidably connected in the connecting box 53, the connecting box 53 and the inner sliding box 54 are square structures, the inner sliding box 54 is a hollow structure, one end of the inner sliding box 54 away from the fixing plate 52 extends out of the connecting box 53, the mounting seat 55 is fixedly installed at the extending end of the inner sliding box 54, and the positioning wheel 56 is rotatably connected to the mounting seat 55 through a connecting shaft and is arranged along the steel die hoisting direction.

[0023] As a preferred solution, further, the auxiliary mounting platform 4 and the connecting platform 51 are connected by a first flange connector 9, and the first flange connector 9 is connected to the auxiliary mounting platform 4 and the connecting platform 51 by bolts. The auxiliary mounting platform 4 and the top cover 6 are connected by a second flange connector 10, and the second flange connector 10 is also connected to the auxiliary mounting platform 4 and the top cover 6 by bolts.

[0024] As a preferred solution, further, an installation connecting plate 13 is fixedly installed in the connecting box 53, and the installation connecting plate 13 is close to the tail end of the connecting box 53. A pipe hole is opened on the surface of the installation connecting plate 13, and a cylinder 14 is fixedly installed on the installation connecting plate 13. The output end of the cylinder 14 is fixedly connected to the inner wall of the inner sliding box 54 away from the connecting platform 51, and the inner sliding box 54 covers the outside of the cylinder 14; a magnetostrictive displacement sensor or a photoelectric encoder is used to monitor the cylinder position, and the intake volume is adjusted by the PID control algorithm so that the four cylinders 14 reach the target position synchronously, and a turbine flow sensor or a differential transformer speed sensor is used to detect the speed deviation, and the intake speed is adjusted by the control algorithm to ensure that the speed is consistent. The four cylinders 14 extend and retract simultaneously and at the same speed. Therefore, when the four positioning wheels 56 are all in contact with the inner wall of the steel mold, the axial position of the steel mold coincides with the axial position of the steel cage 2, completing the positioning and lifting of the steel mold.

[0025] As a preferred solution, further, the cylinder 14 is respectively provided with an exhaust pipe joint 17 and an intake pipe joint 18, and a partition joint 19 is installed on the connecting box 53; a power supply and a solenoid valve are provided inside the connecting platform 51, and the solenoid valve uses a two-position three-way solenoid valve, whose structure includes an air inlet and an air outlet, and the air outlet is connected to the air inlet of the cylinder, and the air inlet simultaneously undertakes the air inlet and outlet functions. When the solenoid valve is energized, the air inlet takes in air and the cylinder 14 extends. After the solenoid valve is de-energized, the air inlet is exhausted and the cylinder 14 retracts; the power supply controls the air inlet and exhaust of the solenoid valve by controlling the on and off of the electromagnet to realize the valve state switching, and the power supply uses a DC power supply, and the switch is controlled by an external control system; a pipe fitting is connected between the solenoid valve and the outer end of the partition joint 19, and the inner end of the partition joint 19 is respectively connected to the exhaust pipe joint 17 and the intake pipe joint 18 and the pipe fitting.

[0026] As a preferred solution, further, a limit block 15 is fixedly installed on the inner wall of the connecting box 53, and the limit block 15 is located on the inner wall close to the opening of the connecting box 53. A slider 16 is fixedly installed on the outer wall of the inner sliding box 54, and the slider 16 is located between the limit block 15 and the installation connecting plate 13. The slider 16 slides and fits with the inner wall of the connecting box 53, and the limit block 15 is used to limit the moving distance of the inner sliding box 54.

[0027] The foundation, the reinforcement cage, the first flange connecting piece, the second flange connecting piece and the air cylinder are prior art, and can be any type as long as they meet the requirements of the present application and are not limited to a single type.

[0028] The specific type or specific circuit structure of the controller of the electrical element, the circuit connection relationship between the electrical elements, and the accurate cooperative control of the plurality of power elements are all prior art, and therefore are not described in detail in the present application.

[0029] Working principle: The electrical elements appearing in the present application are all externally connected to a power supply and a control switch when in use. After the present application is installed, first check the installation and fixation of the present application and the safety protection, and then it can be used. When in use, the reinforcement cage 2 is hoisted to the foundation 1, the reinforcement cage 2 is welded to the foundation reinforcement on the foundation 1, and four columns 3 are installed in the reinforcement cage 2, so that the four columns 3 are arranged in a square with the center of the reinforcement cage 2 as the center.

[0030] Then brush a layer of release agent on the inside of the steel mold, and assemble the steel mold into a complete cylinder. After assembly, place it aside for use. Then the workers go to the top of the reinforcement cage 2 and install the positioning auxiliary mechanism on the column 3. The installation process is as follows: first, the worker rotates the internal thread seat 33 and installs it on the screw rod 31, so that the bottom of the internal thread seat 33 is in close contact with the limiting ring 32. Then the worker inserts the four sockets 12 on the base 11 into the corresponding screw rods 31, so that the base 11 falls on the internal thread seat 33 and is supported by the internal thread seat 33. Then the worker screws on the locking nut 34 to fix the base 11 on the screw rod 31. Then the worker uses the hoisting car to hoist the steel mold from top to bottom to the reinforcement cage 2. During hoisting, the steel mold is preferentially in contact with the top cover 6 to avoid direct contact between the steel mold and the reinforcement cage 2, and the steel mold can be directly sleeved on the outside of the reinforcement cage 2. Finally, when the steel mold is sleeved on the outside of the reinforcement cage 2, the air cylinder 14 is started to drive the inner sliding box 54 to move outward synchronously. When the air cylinder 14 is started, the magnetic strain displacement sensor or the photoelectric encoder is used to monitor the position of the air cylinder, the intake amount is adjusted by the PID control algorithm, the four air cylinders 14 are synchronized to the target position, the turbo flow sensor or the differential transformer type speed sensor is used to detect the speed deviation, the intake speed is adjusted by the control algorithm to ensure consistent speed, and the positioning wheel 56 is in close contact with the inner wall of the steel mold. When the four positioning wheels 56 are in close contact with the inner wall of the steel mold and stop, the steel mold is evenly sleeved on the outside of the reinforcement cage 2, thereby positioning the hoisting process of the steel mold.

[0031] After the steel mold is positioned and installed, the wind cable is used to fix the steel mold to prevent accidents from happening; finally, the concrete is poured into the mold through the conduit, and the internal staff uses the vibrating rod to vibrate the concrete, so that the concrete is not honeycombed; after the mold is removed, the bridge pier is sprayed and maintained to prevent the bridge pier from cracking.

[0032] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application; therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims and not by the above description, and therefore all changes falling within the meaning and range of equivalency of the elements of the claims are intended to be embraced therein; any reference signs in the claims should not be considered as limiting the claims involved.

[0033] In the description of the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited, and the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; the terms "connection", "installation", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like described in the description of the embodiments or examples mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning device for hoisting a bridge pier, comprising: A foundation (1) and a positioning auxiliary mechanism, characterized in that a steel cage (2) is provided on the top of the foundation (1), a plurality of columns (3) are equidistantly provided inside the steel cage (2), the plurality of columns (3) are arranged with the axis of the steel cage (2) as the center, and the positioning auxiliary mechanism is installed on the top of the plurality of columns (3); The positioning auxiliary mechanism comprises: an auxiliary mounting platform (4), a positioning component (5) and a top cover (6); the top of the plurality of columns (3) is provided with an auxiliary mounting platform (4); the bottom of the auxiliary mounting platform (4) is provided with a positioning component (5); the top of the auxiliary mounting platform (4) is provided with a top cover (6); the cross section of the top cover (6) is adapted to the cross section of the steel cage (2).

2. The positioning device for lifting bridge piers according to claim 1, characterized in that: A plurality of connecting arms (7) are equidistantly mounted on the side wall of the auxiliary mounting platform (4), the number of the connecting arms (7) being the same as the number of the columns (3), a base (11) being mounted on the bottom of the connecting arms (7), the base (11) corresponding to the columns (3) on a one-to-one basis, and a connecting and fixing component (8) being provided between the base (11) and the columns (3).

3. The positioning device for lifting bridge piers according to claim 2, characterized in that: The connecting and fixing component (8) includes: a screw (31), a limiting ring (32), an internal thread bracket (33) and a locking nut (34), the screw (31) is installed on the top of the column (3), the limiting ring (32) is fixedly sleeved on the outer wall between the column (3) and the screw (31), the top of the limiting ring (32) is provided with an internal thread bracket (33), the internal thread bracket (33) is threadedly connected to the screw (31), and the internal thread bracket (33) is used to support the base (11); the surface of the screw (31) is threadedly installed with a locking nut (34), and the locking nut (34) is used to fix the base (11).

4. The positioning device for lifting bridge piers according to claim 3, characterized in that: A socket (12) is opened on the top of the base (11), and the socket (12) is adapted to fit the screw (31).

5. The positioning device for hoisting bridge piers according to claim 2, characterized in that: A plurality of mounting grooves (41) are equidistantly formed on the outer wall of the auxiliary mounting platform (4), the number of the mounting grooves (41) being the same as the number of the connecting arms (7), the mounting grooves (41) corresponding to the connecting arms (7) on a one-to-one basis, the top of the connecting arm (7) being inserted into the mounting groove (41), and the connecting arm (7) being fixedly mounted in the mounting groove (41) via a fixing pin (42).

6. The positioning device for lifting bridge piers according to claim 1, characterized in that: The positioning component (5) includes: a connecting platform (51), a fixed plate (52), a connecting box (53), an inner sliding box (54), a mounting seat (55) and a positioning wheel (56). The bottom of the auxiliary mounting platform (4) is installed with a connecting platform (51), a plurality of fixed plates (52) are equidistantly installed on the side wall of the connecting platform (51), a connecting box (53) is fixedly installed on the fixed plate (52), the number of the connecting boxes (53) is the same as that of the connecting arms (7), the connecting boxes (53) and the connecting arms (7) are arranged in an alternating manner, the inner sliding box (54) is slidably connected to the connecting box (53), the inner sliding box (54) extends out of the connecting box (53) at one end away from the fixed plate (52), the extended end of the inner sliding box (54) is fixedly installed with a mounting seat (55), and the middle part of the mounting seat (55) is rotatably connected to the positioning wheel (56).

7. The positioning device for hoisting bridge piers according to claim 6, characterized in that: The auxiliary mounting platform (4) and the connecting platform (51) are connected via a first flange connecting piece (9), and the auxiliary mounting platform (4) and the top cover (6) are connected via a second flange connecting piece (10).

8. The positioning device for hoisting bridge piers according to claim 6, characterized in that: A mounting connection plate (13) is fixedly installed in the connection box (53), a cylinder (14) is fixedly installed on the mounting connection plate (13), and an output end of the cylinder (14) is connected to the inner sliding box (54).

9. The positioning device for hoisting bridge piers according to claim 8, characterized in that: An exhaust pipe joint (17) and an intake pipe joint (18) are respectively provided on the cylinder (14), and a partition joint (19) is installed on the connection box (53).

10. The positioning device for hoisting bridge piers according to claim 8, characterized in that: A limit block (15) is fixedly mounted on the inner wall of the connection box (53), and a slider (16) is fixedly mounted on the outer wall of the inner sliding box (54). The slider (16) is slidably fitted with the inner wall of the connection box (53).

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