Beam erection system and method

Abstract

The disclosed beam erecting system comprises upper and lower hoops connected by rigid chains, an upper connecting seat wrapped outside the upper hoop, the upper connecting seat being provided with an upper plane and a groove recessed downward from the upper plane, wherein the groove depth is greater than the height of the mechanical hoop. In the beam erecting system, the load bearing task of the beam is borne by the upper plane of the upper connecting seat, and the load bearing task of the mechanical hoop is borne by the groove, and the two do not contact or only partially contact during transportation. The horizontal inclination of the beam only depends on the level of the upper connecting seat, so it is easier to meet the horizontal requirements of the beam. The application provides a beam erecting method, wherein the beam is transported to a first transportation height higher than the target erecting position of the upper end of the pier, and after locking the mechanical hoop, the beam is dropped onto the mechanical hoop through the falling of the upper connecting seat.

Description

Technical Field

[0001] This invention relates to the technical field of bridge erection or assembly, and more particularly to a beam erection system and method. Background Technology

[0002] Currently, the construction methods for cap beams are relatively primitive, mainly including ground-mounted scaffolding construction, clamp scaffolding construction, and embedded part / steel bar scaffolding construction. All of these are completed by manual labor in conjunction with engineering machinery. The operation methods are relatively primitive and backward, posing significant safety hazards. The construction period is greatly affected by the weather, and the quality of products made on-site is inconsistent. As the workforce ages, the labor shortage problem is becoming increasingly serious.

[0003] To make the construction of the cap beam more convenient, faster, more economical and safer, China Railway Bridge Bureau Group Co., Ltd. proposed an automatic lifting clamp system in its patent document CN208594486U, and Sichuan Topda Machinery Technology Co., Ltd. provided a stepping climbing machine in its patent document CN216663832U. Both of them complete the climbing and pushing of the crossbeam to the top of the beam column by the cooperation of two clamps and a linear output device.

[0004] In the patent CN216663832U, the stepping climbing machine 1 used for cap beam construction has an outward-turned platform 61 at the upper end of the annular box-shaped outer casing 6. This platform can support the temporary cap beam support system, including the lower clamp 03, 110t jack 04 (or 100-ton jack), upper clamp 05, main beam 06, distribution beam 07, cap beam bottom formwork 08, and cap beam construction work platform 09, used in the prior art cap beam construction using the clamp method. Because the lower clamp 03, 110t jack 04, upper clamp 05, main beam 06, distribution beam 07, cap beam bottom formwork 08, and cap beam construction work platform 09 are stacked layer by layer, they are prone to tilting during transportation. After being transported to the upper end of the bridge pier, the level of the structures used for cap beam construction must be adjusted, increasing the construction difficulty. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a beam erection system and method, which can at least solve the problem that the structure used in cap beam construction is prone to tilting during transportation.

[0006] The invention aims to achieve its objective through the following technical solutions.

[0007] A beam erection system is provided, characterized in that it comprises: An upper clamp and a lower clamp, which are connected by several rigid chains; The upper connecting seat is wrapped around the upper clamp; the upper connecting seat is provided with an upper surface and a groove, the groove being formed by the downward indentation of the upper surface, the upper surface supporting the crossbeam, and the groove supporting the mechanical clamp; The groove depth is greater than the height of the mechanical clamp.

[0008] Preferably, the upper connecting seat has a cavity, the upper clamp is located in the cavity of the upper connecting seat, and the vertical height of the cavity of the upper connecting seat is greater than the vertical thickness of the upper clamp.

[0009] Preferably, one end of each of the two semi-annular arms of the upper clamp is hinged by a pin. The upper wall and / or lower wall of the cavity of the upper connecting seat are provided with upper clamp positioning holes, which position the pin of the upper clamp.

[0010] Preferably, the connecting lug of the mechanical clamp rests on the bottom of the groove, and the bottom of the groove is provided with a through hole.

[0011] Preferably, the beam erection system further includes: The lower connecting seat is wrapped around the lower clamp. A cavity is provided inside the lower connecting seat. The lower clamp is located inside the cavity of the lower connecting seat. The vertical height of the cavity of the lower connecting seat is greater than the vertical thickness of the lower clamp.

[0012] Preferably, one end of each of the two semi-annular arms of the lower clamp is hinged by a pin. The cavity of the lower connecting seat is provided with a lower clamp positioning hole on the upper and / or lower wall surface, and the lower clamp positioning hole positions the pin of the lower clamp.

[0013] A method for erecting a crossbeam is provided, implemented using the crossbeam erection system described above. The method includes: The crossbeam is transported to a first transport height above the target erection position at the top of the bridge pier; Tighten the upper clamp and the lower clamp; Lock the mechanical clamp; The upper clamp is loosened, the rigid chain retracts into the chain box, and the crossbeam falls onto the mechanical clamp.

[0014] Preferably, when the crossbeam is at the first transport height, the lower clamp and the upper clamp are spaced apart in the vertical direction.

[0015] Preferably, the mechanical clamps comprise at least two; during the transport from the ground to the first transport height position, a plurality of the mechanical clamps are vertically stacked in the groove.

[0016] Preferably, when the crossbeam is transported from the top of the pier back to the ground, the rigid chain extends out of the chain box, and the upper connecting seat is used to determine whether it bears the weight of the crossbeam by detecting the torque or current of the drive motor of the rigid chain.

[0017] The beam erection system disclosed in this invention includes an upper clamp and a lower clamp, which are connected by several rigid chains. An upper connecting seat is placed around the upper clamp. The upper connecting seat has an upper surface and a groove, the groove being formed by a downward indentation of the upper surface. The upper surface supports the beam, and the groove supports the mechanical clamp. The groove depth is greater than the height of the mechanical clamp. By setting the upper connecting seat with a groove depth greater than the height of the mechanical clamp, the load-bearing capacity of the beam is borne by the upper surface of the upper connecting seat, and the load-bearing capacity of the mechanical clamp is borne by the groove. During transportation, the two components do not contact or only partially contact each other. The horizontal inclination angle of the beam depends only on the levelness of the upper connecting seat, thus making it easier to meet the horizontal requirements of the beam.

[0018] Furthermore, this application provides a method for erecting a crossbeam, implemented using the crossbeam erection system described above. In this method, the crossbeam is transported to a first transport height above the target erection position at the top of the bridge pier. After the mechanical clamp is locked, the crossbeam is lowered onto the mechanical clamp by the descent of the upper connecting seat. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the beam erection system provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram illustrating the direction of the rigid chain in Embodiment 1 of the present invention; Figure 3 and Figure 4 This is a schematic diagram of the upper connecting seat in the beam erection system provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the lower connecting seat in the beam erection system provided in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the upper or lower clamp in the beam erection system provided in Embodiment 1 of the present invention; Figure 7 This is a flowchart illustrating the rising process in the beam erection method provided in Embodiment 2 of the present invention; Figure 8 This is a flowchart illustrating the lowering process in the beam erection method provided in Embodiment 2 of the present invention. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The principles and features of the present invention are described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0021] In bridge construction, crossbeams are erected on top of bridge piers using mechanical clamps, and cap beams are then constructed on top of the crossbeams. Crossbeam erection refers to fixing the crossbeams to the top of the bridge piers using mechanical clamps. The embodiments provided by this invention can be used for crossbeam erection in bridge construction.

[0022] Example 1 This embodiment provides a beam erection system, referring to... Figure 1 ,Include: An upper clamp and a lower clamp, which are connected by several rigid chains 402; Upper connecting seat 401, wrapped around the upper clamp; combined Figure 3 and 4 The upper connecting seat 401 is equipped with an upper surface 4015 and a groove 4013. The groove 4013 is formed by the upper surface 4015 being recessed downwards. The upper surface 4013 supports the crossbeam 200, and the groove 4013 supports the mechanical clamp 300. Among them, the groove depth of groove 4013 is greater than the height of mechanical clamp 300.

[0023] Figure 1 The lower clamp is enclosed by the lower connecting seat 403. The chain box of the rigid chain 402 is installed on the lower connecting seat 403. The head of the rigid chain 402 is connected to the upper connecting seat 401. The upper clamp and the lower clamp are connected by several rigid chains 402 through the upper connecting seat 401 and the lower connecting seat 403.

[0024] In this embodiment, by setting an upper connecting seat 401 with a groove depth 4013 greater than the height of the mechanical clamp 300, the load-bearing task of the crossbeam 200 is borne by the upper surface 4015 of the upper connecting seat 401, and the load-bearing task of the mechanical clamp 300 is borne by the groove 4013. This ensures that the crossbeam 200 and the mechanical clamp 300 do not contact or only partially contact each other during transportation. In this structure, the horizontal inclination angle of the crossbeam 200 depends only on the levelness of the upper connecting seat 401, thus making it easier to meet the level requirements of the crossbeam 401.

[0025] In this embodiment, for the transmission between the upper connecting seat 401 and the lower connecting seat 403, the technical method is to arrange several rigid chains 402 between the upper connecting seat 401 and the lower connecting seat 403. Unlike the existing technology where rigid chains are only used to lift or lower heavy objects above them, in this application, the rigid chain is also used to pull up or lower heavy objects below it, providing a new way to use the rigid chain. To illustrate the feasibility of this embodiment, the load-bearing characteristics of the rigid chain are explained below. In the prior art, rigid chains are mostly used for stage lifting. During stage lifting, the internal force of the rigid chain outside the chain box is compressive stress, and the internal force of the rigid chain outside the chain box is tensile stress. Therefore, it shows that the rigid chain can withstand both tensile and compressive forces, and can withstand both alternately. The technical solution in this embodiment, which is used to pull up or lower heavy objects below it, utilizes the load-bearing characteristics of the rigid chain to provide a new application scenario and method for the rigid chain. Compared to the technical solution of using jacks and hydraulic cylinders as transmission devices, rigid chains are used as transmission devices in lifting subsystems. Driven by motors, they are easier to synchronize between different rigid chains, the control process is more precise and simple, the cost is low, and there is no need to set up hydraulic stations on the upper or lower connecting seats, meaning that the rigid chain drive device occupies less space.

[0026] One or more rigid chains 402 can be installed between the upper connecting seat 401 and the lower connecting seat 403 on a bridge pier. When two or more rigid chains 402 are installed, their bending directions are different, namely clockwise and counterclockwise. Clockwise or counterclockwise refers to the direction viewed along the length of the rigid chain. (See reference...) Figure 2 The rigid chain 402 can be bent in the direction of S. The rigid chain 402 can only be bent towards the side of the chain plate 4021 where the shoulder 4021b and shoulder groove 4021a are provided. The direction of bending is the bending direction of the rigid chain 402.

[0027] When a rigid chain 402 is installed between the upper connecting seat 401 and the lower connecting seat 403 on a bridge pier, the bendable direction S of the rigid chain 402 on different bridge piers is different, namely clockwise and counterclockwise. The resistance between the rigid chains 402 with different bendable directions S ensures that the rigid chain 402 is not subject to bending moment, thereby ensuring the safety of the crossbeam 200 during transportation.

[0028] Continue to refer to Figure 3 and 4Regarding the structure of the upper connecting seat 401, this embodiment provides an implementation method. The upper connecting seat 401 is formed by connecting a first upper seat sub-unit 4011 and a second upper seat sub-unit 4012. When on the ground, after the upper clamp 404 clamps the pier 100, the first upper seat sub-unit 4011 and the second upper seat sub-unit 4012 are fitted onto its outer side. For the mechanical clamp 300, it can be locked onto the pier 100 before fitting the first upper seat sub-unit 4011 and the second upper seat sub-unit 4012, and then the mechanical clamp 300 can be loosened after the upper connecting seat 401 is installed. Alternatively, the mechanical clamp 300 can be placed into the upper connecting seat 401 after it is installed. Whether the upper connecting seat 401 is connected and then placed in place or is fixed to the pier 100 before the upper connecting seat 401, the mechanical clamp 300 does not grip the pier 100 tightly during the climbing subsystem's ascent. However, the fastening bolts of the mechanical clamp 300 are loosely locked on the mechanical clamp 300.

[0029] In the prior art, there are usually more than two mechanical clamps 300 used on a bridge pier 100. During transportation, the fastening bolts of the mechanical clamps 300 are loosely locked on the mechanical clamps 300. Under such circumstances, the mechanical clamps 300 stacked on top of each other will inevitably shift or tilt. When the crossbeam 200 is transported to the upper end of the bridge pier 100 and needs to be fixed, the groove 4013 of the upper connecting seat 401 is deeper than the height of the mechanical clamp 300, which provides the mechanical clamp 300 with the necessary adjustment space.

[0030] The upper and lower clamps can adopt the same structure. Regarding the structure of the upper and lower clamps, this embodiment provides an implementation method to achieve automatic loosening or tightening of the upper and lower clamps on the pier 100: Reference Figure 6 The automatic clamp 404 includes two clamping arms 4041, each clamping arm 4041 having a first end and a second end. The first ends of the two clamping arms 4041 are connected by a pin 4042. When the end faces of the second ends of the two clamping arms 4041 contact each other, the automatic clamp 404 closes. The second ends of the two clamping arms 4041 are connected by a locking device 4043. The locking device 4043 is powered by a motor 40431 to make the second ends of the two clamping arms 4041 contact or separate, thereby loosening or clamping the pier 100.

[0031] In this embodiment, both the upper and lower clamps can be adopted. Figure 6 The structure of the automatic clamp 404 shown is illustrated.

[0032] Based on the above beam erection system: Reference Figure 7 During the ascent: U1: The contactor controls the frequency converter to connect to the locking motor of the upper clamp, and the frequency converter controls the locking motor of the upper clamp to work, so that the upper clamp clamps the pier 100; then, the contactor controls the frequency converter to connect to the locking motor of the lower clamp, and the frequency converter controls the locking motor of the lower clamp to work, so that the lower clamp releases the pier 100; then, the contactor controls the frequency converter to connect to the drive motor of the rigid chain 402, and the frequency converter controls the drive motor of the rigid chain 402 to work, so that the drive wheel of the rigid chain 402 rotates, the rigid chain 402 retracts into the chain box, and the lower clamp moves closer to the upper clamp; U2: The contactor controls the frequency converter to connect to the locking motor of the lower clamp, and the frequency converter controls the locking motor of the lower clamp to work, so that the lower clamp clamps the pier 100; then, the contactor controls the frequency converter to connect to the locking motor of the upper clamp, and the frequency converter controls the locking motor of the upper clamp to work, so that the upper clamp releases the pier 100; then, the contactor controls the frequency converter to connect to the drive motor of the rigid chain 402, and the frequency converter controls the drive motor of the rigid chain 402 to work, so that the drive wheel of the rigid chain 402 rotates, the rigid chain 402 extends out of the chain box, and the upper clamp moves away from the lower clamp; U1 and U2 are performed alternately to complete the climbing process; Reference Figure 8 During descent: D1: The contactor controls the frequency converter to connect to the locking motor of the upper clamp, and the frequency converter controls the locking motor of the upper clamp to work, so that the upper clamp clamps the pier 100; then, the contactor controls the frequency converter to connect to the locking motor of the lower clamp, and the frequency converter controls the locking motor of the lower clamp to work, so that the lower clamp releases the pier 100; then, the contactor controls the frequency converter to connect to the drive motor of the rigid chain 402, and the frequency converter controls the drive motor of the rigid chain 402 to work, so that the drive wheel of the rigid chain 402 rotates, the rigid chain 402 extends out of the chain box, and the lower clamp moves away from the upper clamp; D2: The contactor controls the frequency converter to connect to the locking motor of the lower clamp, and the frequency converter controls the locking motor of the lower clamp to work, so that the lower clamp clamps the pier 100; then, the contactor controls the frequency converter to connect to the locking motor of the upper clamp, and the frequency converter controls the locking motor of the upper clamp to work, so that the upper clamp releases the pier 100; then, the contactor controls the frequency converter to connect to the drive motor of the rigid chain 402, and the frequency converter controls the drive motor of the rigid chain 402 to work, so that the drive wheel of the rigid chain 402 rotates, the rigid chain 402 retracts into the chain box, and the upper clamp moves closer to the lower clamp; D1 and D2 are performed alternately to complete the descent process.

[0033] The lifting and lowering processes are achieved by controlling the sequence of motion between the upper clamp, the lower clamp, and the rigid chain 402.

[0034] To improve the safety of the crossbeam erection system, the upper clamp, lower clamp, and rigid chain 402 are controlled by the same frequency converter. The frequency converter can only drive one of the three at a time, thus preventing the risk of the upper and lower clamps simultaneously loosening and causing the pier 100 to fall, and also preventing overload caused by the upper and lower clamps simultaneously tightening and the rigid chain 402 changing length. Ensuring that the operating ranges of the upper clamp, lower clamp, and rigid chain 402 do not overlap improves the safety of the climbing or descending process. Furthermore, since only one frequency converter controls all the moving mechanisms, the control cost of the entire crossbeam erection system is reduced, saving costs, and the control logic and control system are simplified.

[0035] This embodiment provides a preferred implementation method; please continue to refer to... Figure 3 and 4 A cavity 4014 is provided inside the upper connecting seat 401. The upper clamp (which adopts the structure of the aforementioned automatic clamp 404) is located inside the cavity 4014 of the upper connecting seat 401. The vertical height of the cavity 4014 of the upper connecting seat 401 is greater than the vertical thickness of the upper clamp. This preferred embodiment can also be used on the lower clamp, specifically: Reference Figure 1 and Figure 5 The beam erection system further includes: The lower connecting seat 403 is wrapped around the lower clamp (which adopts the structure of an automatic clamp 404). A cavity is provided inside the lower connecting seat 403, and the lower clamp is located inside the cavity of the lower connecting seat 403. The vertical height of the cavity of the lower connecting seat 403 is greater than the vertical thickness of the lower clamp.

[0036] In this preferred embodiment, in steps U1, U2, D1, and D2 described above: During the climb: When the upper clamp bears the weight of the upper connecting seat 401, lower connecting seat 403 and crossbeam 200, the pier 100 is loosened; since the vertical height of the cavity of the upper connecting seat 401 is greater than the vertical thickness of the upper clamp, the upper clamp will fall onto the upper connecting seat 401 after it is loosened from the pier 100. When the weight of the upper clamp is supported by the upper connecting seat 401, the pier 100 is tightened.

[0037] When the lower clamp bears the weight of the lower connecting seat 403, the upper connecting seat 401, and the crossbeam 200, the pier 100 is loosened. Since the vertical height of the cavity of the lower connecting seat 403 is greater than the vertical thickness of the lower clamp, the upper clamp will fall onto the upper connecting seat 401 after the pier 100 is loosened. When the weight of the lower clamp is supported by the lower connecting seat 403, the pier 100 is tightened.

[0038] Similarly, during descent: When the upper clamp bears the weight of the upper connecting seat 401, the lower connecting seat 403 and the crossbeam 200, the pier 100 is loosened; when the weight of the upper clamp is borne by the upper connecting seat 401, the pier 100 is tightened.

[0039] When the lower clamp bears the weight of the lower connecting seat 403, the upper connecting seat 401 and the crossbeam 200, the pier 100 is loosened; when the weight of the lower clamp is borne by the lower connecting seat 403, the pier 100 is tightened.

[0040] By setting the height of the cavity to be greater than the thickness of the upper or lower clamp, a gap is left in the height. During the locking process of the upper or lower clamp, the friction between the upper or lower clamp and the upper or lower connecting seat is reduced. Minimizing the friction can prevent the upper connecting seat 401 and the lower connecting seat 403 from turning relative to the pier 100. Turning will interfere with the strength of the rigid chain, thus affecting the instability of the entire beam erection system.

[0041] In order to fix the position between the upper clamp and the upper connecting seat 401, in a preferred embodiment: one end of the two semi-annular clamp arms of the upper clamp is hinged by a pin; the upper clamp positioning hole is provided on the upper wall and / or lower wall of the cavity of the upper connecting seat 401, and the upper clamp positioning hole positions the pin of the upper clamp.

[0042] Similarly, one end of the two semi-annular arms of the lower clamp is hinged by a pin; a lower clamp positioning hole is provided on the upper and / or lower wall of the cavity of the lower connecting seat 403, and the lower clamp positioning hole positions the pin of the lower clamp.

[0043] In a preferred embodiment, refer to Figure 3 The connecting ear 301 of the mechanical clamp 300 rests on the bottom of the groove 4013. The bottom of the groove 4013 is equipped with a through hole to minimize the instability of the mechanical clamp 300 during transportation.

[0044] Example 2 This embodiment provides a method for erecting a crossbeam, implemented using the crossbeam erection system provided in Embodiment 1. The method includes: Transport the crossbeam 200 to the first transport height above the target erection position above the top of the pier 100; Tighten the upper clamp and the lower clamp; Locking mechanical clamp 300; When the upper clamp is loosened, the rigid chain 402 retracts into the chain box, and the crossbeam 200 falls onto the mechanical clamp 300.

[0045] By transporting the crossbeam 200 to a first transport height above the target erection position above the pier 100, the mechanical clamp 300 can be installed at its target position.

[0046] When the crossbeam 200 is at the first transport height, there is a vertical gap between the lower clamp and the upper clamp, which allows space for the upper connecting seat 401 to descend after the upper clamp is relaxed.

[0047] Among them, the mechanical clamps 300 include at least two; during the transportation from the ground to the first transportation height, several mechanical clamps 300 are vertically stacked in the groove 4013 for transportation.

[0048] When the crossbeam 200 is transported from the upper end of the pier 100 back to the ground, the rigid chain 402 first extends out of the chain box. At this time, the torque or current of the drive motor of the rigid chain 402 is detected to determine whether the upper connecting seat 401 bears the weight of the crossbeam 200.

[0049] Example 3 The beam erection system provided in Example 1 is configured with the number of upper clamps, lower clamps and rigid chains, etc., according to the number of piers 100 or the number of mechanical clamps to be transported as needed. Multiple sets of structures work together to support the beam 200.

[0050] To ensure that the crossbeam 200 remains horizontal during transportation, the crossbeam erection method provided in Example 2 also includes: The height difference between different groups of structures is detected, and the speed of the drive motor of the rigid chain in a certain group is adjusted according to the height difference; When the height difference exceeds the threshold, the beam erection system is controlled to stop and an alarm is triggered.

[0051] This embodiment provides a specific implementation method for detecting the height difference between different groups of structures and adjusting the speed of the drive motor of the rigid chain within a certain group of structures based on the height difference; by Figure 1 For example, during the ascent, after step U2, the height difference between different groups of structures is detected or collected. If the upper clamp on the left is detected to be higher than the upper clamp on the right, then in the next step U1, the drive wheel output of the rigid chain 402 in the two groups of structures is determined according to the distance between the upper and lower clamps on the right. In the next step U2, the output of the rigid chain 402 on the left is set to be less than the output of the rigid chain 402 on the right. The difference between the two outputs corresponds to the difference between the two in the previous step U2, so that the height of the upper clamp on the left is equal to the height of the upper clamp on the right.

[0052] by Figure 1Taking the example shown, during descent: After step D2, the height difference between different groups of structures is detected or collected. If it is detected that the upper clamp on the left is higher than the upper clamp on the right, then in the next step D1, the output of the rigid chain 402 on the left is greater than the output of the rigid chain 402 on the right. The difference between the two outputs corresponds to the difference detected after step D2 that the upper clamp on the left is higher than the upper clamp on the right. In the subsequent step D2, the drive wheel output of the rigid chain in the two groups of structures is determined according to the distance between the upper and lower clamps on the right, so that the height of the upper clamp in the right climbing system is the same as the height of the upper clamp in the left climbing system.

[0053] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A beam erection system, characterized in that, Include: An upper clamp and a lower clamp, which are connected by several rigid chains; The upper connecting seat is wrapped around the upper clamp; the upper connecting seat is provided with an upper surface and a groove, the groove being formed by the downward indentation of the upper surface, the upper surface supporting the crossbeam, and the groove supporting the mechanical clamp; Wherein, the groove depth is greater than the height of the mechanical clamp; The upper connecting seat is provided with a cavity, and the upper clamp is located in the cavity of the upper connecting seat. The vertical height of the cavity of the upper connecting seat is greater than the vertical thickness of the upper clamp. The rigid chain is connected to the upper connecting seat, and the upper clamp and the lower clamp are connected by a plurality of the rigid chains through the upper connecting seat.

2. The beam erection system according to claim 1, characterized in that, The two semi-circular arms of the upper clamp are hinged at one end by a pin. The upper wall and / or lower wall of the cavity of the upper connecting seat are provided with upper clamp positioning holes, which position the pin of the upper clamp.

3. The beam erection system according to claim 1, characterized in that, The connecting lug of the mechanical clamp rests on the bottom of the groove, and the bottom of the groove is provided with a through hole.

4. The beam erection system according to claim 1, characterized in that, Also includes: The lower connecting seat is wrapped around the lower clamp. A cavity is provided inside the lower connecting seat. The lower clamp is located inside the cavity of the lower connecting seat. The vertical height of the cavity of the lower connecting seat is greater than the vertical thickness of the lower clamp.

5. The beam erection system according to claim 4, characterized in that, The two semi-circular arms of the lower clamp are hinged at one end by a pin. The cavity of the lower connecting seat is provided with a lower clamp positioning hole on the upper and / or lower wall surface, and the lower clamp positioning hole positions the pin of the lower clamp.

6. A method for erecting crossbeams, characterized in that, Implemented using the beam erection system according to any one of claims 1-5, the beam erection method comprises: The crossbeam is transported to a first transport height above the target erection position at the top of the bridge pier; Tighten the upper clamp and the lower clamp; Tighten the mechanical clamp; The upper clamp is loosened, the rigid chain retracts into the chain box, and the crossbeam falls onto the mechanical clamp.

7. The method for erecting a crossbeam according to claim 6, characterized in that, When the crossbeam is at the first transport height, there is a vertical gap between the lower clamp and the upper clamp.

8. The method for erecting a crossbeam according to claim 6, characterized in that, The mechanical clamps comprise at least two; during the transport from the ground to the first transport height position, a plurality of the mechanical clamps are vertically stacked in the groove.

9. The method for erecting a crossbeam according to claim 6, characterized in that, When the crossbeam is transported from the top of the pier back to the ground, the rigid chain extends out of the chain box. The torque or current of the drive motor of the rigid chain is detected to determine whether the upper connecting seat bears the weight of the crossbeam.

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