Steel tube arch bridge segment hoisting butt joint positioning tool

Abstract

The utility model discloses a steel tube arch bridge segment hoisting butt joint positioning tool, and relates to the technical field of steel tube arch bridge construction equipment. Comprising a connecting frame used for being connected with a lifting frame and keeping vertical arrangement under the condition that the connecting frame is connected with the lifting frame; the clamping hoop rod is mounted at the lower part of the connecting frame, the opening end of the clamping hoop rod faces downwards, and the clamping hoop rod can be clamped outside the mounting end of the mounted steel tube arch bridge section; the guide frame is mounted at the lower part of the connecting frame, is positioned in the middle of the opening of the clamping hoop rod, and is of a V-shaped structure; the damping limiting assembly is installed on the connecting frame, and the damping limiting assembly is located at the initial end of the sliding path of the lifting frame; under the action of the dead weight of the steel tube arch bridge section, the mounting end of the steel tube arch bridge section can be clamped between the clamping hoop rod and the upper end of the guide frame, and the hanging frame can overcome damping of the damping limiting assembly to slide downwards relative to the connecting frame. According to the utility model, the hoisting frame can be automatically and quickly positioned.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe arch bridge construction equipment, in particular to a hoisting and butt-joint positioning tool for steel pipe arch bridge segments. Background Art

[0002] A steel pipe arch bridge refers to a concrete-filled steel tube arch bridge, and its arch part is spliced by steel pipe trusses. In the prior art, the hoisting and butt-joint joints of steel pipe arch ribs are connected in the form of bolt connection with inner flange plates and external welding of pipes, and self-compacting compensated shrinkage concrete is poured into the upper and lower chord steel pipes of the arch ribs. During construction, after the welding of the steel pipe arch bridge segments is completed, they are usually hoisted upward from the steel platform to the installation position through a pre-set cable hoisting system, and then installed. However, the cable hoisting cable crane can only achieve vertical lifting and longitudinal movement along the length direction of the cable. When the steel pipe arch bridge segment approaches the fixed end, it is often aligned by manual dragging, which not only has a large labor intensity and low butt-joint efficiency, but also has a high safety hazard. Content of the Utility Model

[0003] Aiming at the technical problem that manual dragging is required for alignment during the hoisting and butt-joint of existing steel pipe arch bridge segments; the utility model provides a hoisting and butt-joint positioning tool for steel pipe arch bridge segments, which can realize the automatic and rapid positioning of the hoisting frame through the relative movement and connection with the already installed steel pipe arch bridge segment when the hoisted steel pipe arch bridge segment approaches the fixed end, so as to reduce the labor intensity of hoisting the steel pipe arch bridge segment and improve the butt-joint efficiency and safety.

[0004] The utility model is realized through the following technical solutions:

[0005] The utility model provides a hoisting and butt-joint positioning tool for steel pipe arch bridge segments, including: a connecting frame, the connecting frame is used to connect the hoisting frame, and when the connecting frame is connected to the hoisting frame, the connecting frame is kept vertically arranged; a clamping hoop rod, the clamping hoop rod is installed at the lower part of the connecting frame, the opening end of the clamping hoop rod faces downward, and the clamping hoop rod can be clamped outside the installation end of the already installed steel pipe arch bridge segment; a guiding frame, the guiding frame is installed at the lower part of the connecting frame, the guiding frame is located in the middle of the opening of the clamping hoop rod, and the guiding frame is of a V-shaped structure; a damping limiting component, the damping limiting component is installed on the connecting frame, and the damping limiting component is located at the initial end of the sliding path of the hoisting frame; wherein, under the action of the self-weight of the steel pipe arch bridge segment, the installation end of the steel pipe arch bridge segment can be clamped between the clamping hoop rod and the upper end of the guiding frame, and the hoisting frame can slide downward relative to the connecting frame against the damping of the damping limiting component.

[0006] The segment hoisting and docking positioning tooling for a steel pipe arch bridge provided by the utility model comprises a connecting frame, a clamping hoop rod, a guiding frame and a damping limiting member. The connecting frame is used for connecting a hoisting frame. The clamping hoop rod is installed at the lower part of the connecting frame. The guiding frame is installed at the lower part of the connecting frame, and the guiding frame is located in the middle of the opening of the clamping hoop rod. The damping limiting component is installed on the connecting frame. During use, the hoisting frame is connected to the cable of the cable hoisting system, and the connecting frame is installed on the hoisting frame and the connecting frame is kept in a vertical state (by setting the position of the connection between the hoisting frame and the cable of the cable hoisting system, the hoisting frame after installing the connecting frame is kept flush so that the connecting frame is kept vertical). The segment of the steel pipe arch bridge to be installed is hoisted on the hoisting frame through the cable, and is vertically hoisted from the front of the connection end of the already installed segment of the steel pipe arch bridge through the cable hoisting system. The segment of the steel pipe arch bridge to be installed is hoisted to the upper front of the connection end of the already installed segment of the steel pipe arch bridge, and then the segment of the steel pipe arch bridge to be installed is hoisted to the upper part of the connection end of the already installed segment of the steel pipe arch bridge through the cable hoisting system, so that the lower part of the guiding frame faces the space between the two upper chord pipes of the connection end of the already installed segment of the steel pipe arch bridge, and the segment of the steel pipe arch bridge to be installed is lowered by the cable hoisting system.

[0007] Since the guiding frame is V-shaped, installed at the lower part of the connecting frame and located in the middle of the opening of the clamping hoop rod, during the process of lowering the segment of the steel pipe arch bridge to be installed by the cable hoisting system, the lower end of the guiding frame first inserts into the space between the two upper chord pipes of the connection end of the already installed segment of the steel pipe arch bridge, and as the lowering proceeds, the side wall of the guiding frame abuts against the inner side wall of the upper chord pipe of the connection end of the already installed segment of the steel pipe arch bridge, thus playing a guiding role and enabling the guiding frame to self-align and insert into the already installed segment of the steel pipe arch bridge until the clamping hoop rod is clamped outside the installation end of the segment of the steel pipe arch bridge, so that the connecting frame is clamped on the already installed segment of the steel pipe arch bridge through the clamping hoop rod and the lower end of the guiding frame, and the connecting frame is used to provide guidance for the downward movement of the hoisting frame. After the connecting frame is clamped on the already installed segment of the steel pipe arch bridge, the hoisting frame is continuously lowered. Under the action of the self-weight of the hoisting frame and the segment of the steel pipe arch bridge to be installed, it slides downward relative to the connecting frame against the damping of the damping limiting component and finally reaches the installation position.

[0008] Among them, during the process of lowering the connecting frame, since the guiding frame is of a V-shaped structure and its side wall abuts against the inner side wall of the upper chord pipe of the connection end of the already installed segment of the steel pipe arch bridge, the guiding frame self-aligns and inserts into the already installed segment of the steel pipe arch bridge, realizing the lateral rapid positioning of the hoisting frame, and reducing the workload of lateral attitude adjustment of the segment of the steel pipe arch bridge to be installed; moreover, the already installed segment of the steel pipe arch bridge is connected to the hoisting frame through the connecting frame, restricting the lateral and circumferential movement of the hoisting frame, avoiding the swinging of the cable of the cable hoisting system and making it difficult to align the docking joint when adjusting the attitude of the segment of the steel pipe arch bridge to be installed, thus reducing the labor intensity of hoisting the segment of the steel pipe arch bridge and improving the docking efficiency and safety.

[0009] In an alternative embodiment, the connecting frame is provided with: limiting sliding rails, two of which are provided, and the two limiting sliding rails are respectively arranged on both sides of the connecting frame; a connecting slider, which is slidably clamped outside the two limiting sliding rails, and the connecting slider is used to connect the hanging frame so that the hanging frame can only slide relative to the connecting frame, avoiding the hanging frame from moving in other directions when adjusting the attitude of the steel pipe arch bridge segment.

[0010] In an alternative embodiment, the upper end of the guiding frame is provided with: a first clamping rod, the upper end of which is hinged to the corresponding side of the lower end of the connecting frame; a second clamping rod, the upper end of which is hinged to the corresponding other side of the lower end of the connecting frame; a pressure telescopic rod, the two ends of which are respectively hinged to the lower ends of the first clamping rod and the second clamping rod; wherein, in the installation state, the pressure telescopic rod drives the lower ends of the first clamping rod and the second clamping rod to move away from each other relatively, so as to drive the first clamping rod and the second clamping rod to clamp the installed steel pipe arch bridge segment through the pressure telescopic rod, ensuring the stability of the connection between the connecting frame and the installed steel pipe arch bridge segment.

[0011] In an alternative embodiment, the pressure telescopic rod includes: a pressure sleeve, in which a compression spring is fitted; a first pressing rod, one end of which is hinged to one end of the first clamping rod opposite to the connecting frame and the other end of which is slidably inserted into the pressure sleeve; a second pressing rod, one end of which is hinged to one end of the second clamping rod opposite to the connecting frame and the other end of which is slidably inserted into the pressure sleeve. Wherein, in the positioning state, the compression spring is squeezed by the first pressing rod and the second pressing rod to ensure that the pressure telescopic rod can contract when being squeezed.

[0012] In an alternative embodiment, two compression springs are provided, and two pressure equalizing pistons are fitted in the pressure sleeve. The two pressure equalizing pistons are located between the two compression springs, and the cavity between the two pressure equalizing pistons is filled with hydraulic oil; the damping limiting assembly includes a damping hydraulic cylinder, a damping piston rod and a damping block. The piston section of the damping piston rod is inserted into the damping hydraulic cylinder, the damping block is installed at the outer end of the damping piston rod, and the side of the damping block away from the damping piston rod is a downward inclined plane, and the damping block is located on the sliding path of the connecting slider; wherein, the length direction of the damping piston rod is perpendicular to the length direction of the connecting frame, and the liquid outlet end of the damping hydraulic cylinder is communicated with the cavity between the two pressure equalizing pistons through a reversible one-way valve.

[0013] Thus, when the connecting frame is clamped on the installation end of the installed steel pipe arch bridge segment, the steel pipe arch bridge segment to be installed is lowered by a crane. Under the action of the self-weight of the steel pipe arch bridge segment to be installed, the hanging frame slides downward relative to the connecting frame, and at the same time squeezes the damping block, thereby squeezing the hydraulic oil in the damping hydraulic cylinder. At this time, the reversible one-way valve can damp the backflow of the hydraulic oil to pressurize the hydraulic oil in the sleeve, further compress the two compression springs, increase the extrusion force of the pressure expansion rod acting on the first clamping rod and the second clamping rod, and further improve the stability of the connection between the connecting frame and the installed steel pipe arch bridge segment, and avoid the hanging frame from shaking when adjusting the attitude of the steel pipe arch bridge segment to be installed.

[0014] In an optional embodiment, the reversible one-way valve includes: a reversing valve body provided with a communication channel; a reversing valve core provided with a one-way flow component, and the one-way flow component is arranged in the communication channel to switch the conduction direction of the one-way flow component by rotating the reversing valve core.

[0015] In an optional embodiment, the one-way flow component is a ball-type one-way valve to ensure sufficient reliability of the reversible one-way valve.

[0016] In an optional embodiment, the effective cross-sectional area of the pressure equalizing piston is larger than the effective cross-sectional area of the piston of the damping piston rod to amplify the gravity of the steel pipe arch bridge segment and the lifting frame acting on the pressure expansion rod, and further ensure the stability of the connection between the connecting frame and the installed steel pipe arch bridge segment.

[0017] In an optional embodiment, a sliding pad is arranged on the outer side wall of the guiding frame, and the sliding pad is made of polytetrafluoroethylene to reduce the friction between the guiding frame and the installed steel pipe arch bridge segment by utilizing the self-lubricating property of polytetrafluoroethylene.

[0018] In an optional embodiment, the clamping hoop rod is in a U-shape with the opening facing downward to further ensure the stability when the connecting frame clamps the installed steel pipe arch bridge segment.

[0019] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0020] The segment hoisting and docking positioning tooling for a steel pipe arch bridge provided by the present utility model includes a connecting frame, a clamping hoop rod, a guiding frame, and a damping limiting member. The connecting frame is used to connect the hoisting frame. The clamping hoop rod is installed at the lower part of the connecting frame. The guiding frame is installed at the lower part of the connecting frame, and the guiding frame is located in the middle of the opening of the clamping hoop rod. The damping limiting assembly is installed on the connecting frame. By abutting the inner side wall of the upper chord pipe at the connecting end of the already installed steel pipe arch bridge segment against the side wall of the guiding frame, the guiding frame is self-centered and inserted into the already installed steel pipe arch bridge segment, realizing the lateral rapid positioning of the hoisting frame, and being able to reduce the workload of adjusting the lateral attitude of the steel pipe arch bridge segment to be installed. Moreover, by connecting the already installed steel pipe arch bridge segment with the hoisting frame through the connecting frame, the lateral and circumferential movement of the hoisting frame is restricted, avoiding the swaying of the cables of the cable hoisting system and making it difficult to align the docking joints when adjusting the attitude of the steel pipe arch bridge segment to be installed, thereby reducing the labor intensity of hoisting the steel pipe arch bridge segment and improving the docking efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0022] In the drawings:

[0023] Figure 1 is a side view structural diagram of the segment hoisting and docking positioning tooling for a steel pipe arch bridge in an embodiment of the present utility model;

[0024] Figure 2 is a structural diagram of the pressure telescopic rod in an embodiment of the present utility model;

[0025] Figure 3 is a structural diagram of the damping limiting assembly in an embodiment of the present utility model;

[0026] Figure 4 is a structural diagram of the reversible one-way valve in an embodiment of the present utility model.

[0027] Marks in the drawings and corresponding component names:

[0028] 210 - connecting bracket, 211 - limiting slide rail, 212 - connecting slider, 220 - clamping hoop rod, 230 - guiding frame, 231 - first clamping rod, 232 - second clamping rod, 240 - pressure telescopic rod, 241 - pressure sleeve, 242 - compression spring, 243 - first pressing rod, 244 - second pressing rod, 245 - pressure equalizing piston, 250 - damping limiting component, 251 - damping hydraulic cylinder, 252 - damping piston rod, 253 - damping stop block, 260 - reversible one - way valve, 261 - reversing valve body, 262 - reversing valve core, 263 - one - way flow component. Specific embodiments

[0029] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing this application 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 to this application.

[0031] Meanwhile, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Embodiment:

[0033] Combined with Figure 1, this embodiment provides a segment hoisting and docking positioning tooling for a steel pipe arch bridge, including: a connecting frame 210, which is used to connect a hoisting frame, and when the connecting frame 210 is connected to the hoisting frame, the connecting frame 210 remains vertically arranged; a clamping hoop rod 220, which is installed at the lower part of the connecting frame 210, the open end of the clamping hoop rod 220 faces downward, and the clamping hoop rod 220 can be clamped outside the installation end of the installed steel pipe arch bridge segment; a guiding frame 230, which is installed at the lower part of the connecting frame 210, the guiding frame 230 is located in the middle of the opening of the clamping hoop rod 220, and the guiding frame 230 is a V-shaped structure; a damping limiting component 250, which is installed on the connecting frame 210, and the damping limiting component 250 is located at the initial end of the sliding path of the hoisting frame; wherein, under the action of the self-weight of the steel pipe arch bridge segment, the installation end of the steel pipe arch bridge segment can be clamped between the clamping hoop rod 220 and the upper end of the guiding frame 230, and the hoisting frame can slide downward relative to the connecting frame 210 against the damping of the damping limiting component 250.

[0034] Specifically, the connecting frame 210 is provided with: a limiting slide rail 211, and there are two limiting slide rails 211, and the two limiting slide rails 211 are respectively arranged on both sides of the connecting frame 210; a connecting slider 212, which can be slidably clamped outside the two limiting slide rails 211, and the connecting slider 212 is used to connect the hoisting frame, so that the hoisting frame can only slide relative to the connecting frame 210, avoiding the hoisting frame from moving in other directions when adjusting the attitude of the steel pipe arch bridge segment. It can be understood that there are only limiting parts at both ends of the limiting slide rail 211 to prevent the connecting slider 212 from slipping off the limiting slide rail 211.

[0035] For the clamping hoop rod 220, in this embodiment, the clamping hoop rod 220 is a U-shaped with the opening facing downward to ensure the stability when the connecting frame 210 clamps the installed steel pipe arch bridge segment.

[0036] Generally speaking, a sliding pad is arranged on the outer side wall of the guiding frame 230, and the sliding pad is made of polytetrafluoroethylene, so as to utilize the self-lubricating property of polytetrafluoroethylene to reduce the friction between the guiding frame 230 and the installed steel pipe arch bridge segment.

[0037] On this basis, the upper end of the guiding frame 230 is provided with: a first clamping rod 231, the upper end of the first clamping rod 231 is hinged to one side corresponding to the lower end of the connecting frame 210; a second clamping rod 232, the upper end of the second clamping rod 232 is hinged to the other side corresponding to the lower end of the connecting frame 210; a pressure telescopic rod 240, both ends of the pressure telescopic rod 240 are respectively hinged to the lower ends of the first clamping rod 231 and the second clamping rod 232; wherein, in the installed state, the pressure telescopic rod 240 drives the lower ends of the first clamping rod 231 and the second clamping rod 232 to move relatively away from each other, so as to drive the first clamping rod 231 and the second clamping rod 232 to clamp the installed steel tube arch bridge segment with the clamping hoop rod 220 through the pressure telescopic rod 240, ensuring the stability of the connection between the connecting frame 210 and the installed steel tube arch bridge segment.

[0038] Combined with Figure 2 , the pressure telescopic rod 240 includes: a pressure sleeve 241, a compression spring 242 is fitted in the pressure sleeve 241; a first pressing rod 243, one end of the first pressing rod 243 is hinged to one end of the first clamping rod 231 facing the connecting frame 210, and the other end is slidably inserted into the pressure sleeve 241; a second pressing rod 244, one end of the second pressing rod 244 is hinged to one end of the second clamping rod 232 facing the connecting frame 210, and the other end is slidably inserted into the pressure sleeve 241. Wherein, in the positioning state, the compression spring 242 is squeezed by the first pressing rod 243 and the second pressing rod 244 to ensure that the pressure telescopic rod 240 can contract when being squeezed.

[0039] Combined with Figure 2 and Figure 3 , to ensure the stability of the connection between the connecting frame 210 and the installed steel tube arch bridge segment, in this embodiment, two compression springs 242 are provided, and two pressure equalizing pistons 245 are fitted in the pressure sleeve 241. The two pressure equalizing pistons 245 are located between the two compression springs 242, and the cavity between the two pressure equalizing pistons 245 is filled with hydraulic oil; the damping limit assembly 250 includes a damping hydraulic cylinder 251, a damping piston rod 252 and a damping block 253. The piston section of the damping piston rod 252 is inserted into the damping hydraulic cylinder 251, the damping block 253 is installed at the outer end of the damping piston rod 252, the side of the damping block 253 away from the damping piston rod 252 is a downward inclined plane, and the damping block 253 is located on the sliding path of the connecting slider 212; wherein, the length direction of the damping piston rod 252 is perpendicular to the length direction of the connecting frame 210, and the liquid outlet end of the damping hydraulic cylinder 251 is communicated with the cavity between the two pressure equalizing pistons 245 through a reversible one-way valve 260.

[0040] Thus, when the connecting frame 210 is clamped on the installation end of the installed steel pipe arch bridge segment, the steel pipe arch bridge segment to be installed is lowered by a crane. Under the action of the self-weight of the steel pipe arch bridge segment to be installed, the hanging frame slides downward relative to the connecting frame 210, and at the same time squeezes the damping block 253, thereby squeezing the hydraulic oil in the damping hydraulic cylinder 251. And the hanging frame continues to slide downward. At this time, the reversible one-way valve 260 can damp the return flow of the hydraulic oil to pressurize the hydraulic oil in the sleeve, further compress the two compression springs 242, and increase the extrusion force of the pressure telescopic rod 240 acting on the first clamping rod 231 and the second clamping rod 232, further improving the stability of the connection between the connecting frame 210 and the installed steel pipe arch bridge segment, and avoiding the shaking of the hanging frame when adjusting the attitude of the steel pipe arch bridge segment to be installed.

[0041] Wherein, the effective cross-sectional area of the pressure equalizing piston 245 is larger than the effective cross-sectional area of the piston of the damping piston rod 252, so as to amplify the gravity of the steel pipe arch bridge segment and the lifting frame and act on the pressure telescopic rod 240, further ensuring the stability of the connection between the connecting frame 210 and the installed steel pipe arch bridge segment.

[0042] Combined with Figure 4 , the reversible one-way valve 260 includes: a reversing valve body 261, and the reversing valve body 261 is provided with a communication channel; a reversing valve core 262, and the reversing valve core 262 is provided with a one-way flow component 263, and the one-way flow component 263 is arranged in the communication channel to switch the conduction direction of the one-way flow component 263 by rotating the reversing valve core 262.

[0043] Preferably, the one-way flow component 263 is a ball-type one-way valve to ensure sufficient reliability of the reversible one-way valve 260.

[0044] It should be noted that when the steel pipe arch bridge segment hoisting and docking positioning tooling provided in this embodiment is used, the lifting frame is connected to the cable of the cable hoisting system, and the connecting frame 210 is installed on the hanging frame and the connecting frame 210 is kept vertical (by setting the position of the connection between the lifting frame and the cable of the cable hoisting system, the lifting frame after installing the connecting frame 210 is kept flush to make the connecting frame 210 vertical). The steel pipe arch bridge segment to be installed is hoisted on the lifting frame by the cable, and is vertically hoisted from the front of the connection end of the installed steel pipe arch bridge segment through the cable hoisting system, and the steel pipe arch bridge segment to be installed is hoisted to the upper front of the connection end of the installed steel pipe arch bridge segment, and then the steel pipe arch bridge segment to be installed is hoisted to the upper part of the connection end of the installed steel pipe arch bridge segment through the cable hoisting system, so that the lower part of the guiding frame 230 is directly opposite to the two upper chord pipes of the connection end of the installed steel pipe arch bridge segment, and the steel pipe arch bridge segment to be installed is lowered by the cable hoisting system.

[0045] Since the guide frame 230 is V-shaped, installed at the lower part of the connecting frame 210, and located in the middle of the opening of the clamping hoop rod 220, during the process of lowering the steel pipe arch bridge segment to be installed by the cable hoisting system, the lower end of the guide frame 230 first inserts between the two upper chord pipes at the connecting end of the already installed steel pipe arch bridge segment. As the lowering progresses, the side wall of the guide frame 230 abuts against the inner side wall of the upper chord pipe at the connecting end of the already installed steel pipe arch bridge segment, thus playing a guiding role and enabling the guide frame 230 to self-center and insert into the already installed steel pipe arch bridge segment.

[0046] Moreover, as the guide frame 230 moves downward, the first clamping rod 231 and the second clamping rod 232 are clamped between the two upper chord pipes at the connecting end of the already installed steel pipe arch bridge segment, and the upper ends of the first clamping rod 231 and the second clamping rod 232 rotate inward, compressing the pressure telescopic rod 240 by the gravity of the hanging frame and the steel pipe arch bridge segment to be installed. The spring in the pressure telescopic rod 240 provides a reaction force to output a top pressure to the first clamping rod 231 and the second clamping rod 232, and clamp the already installed steel pipe arch bridge segment with the side wall corresponding to the clamping hoop rod 220, ensuring the stability of the connection between the connecting frame 210 and the already installed steel pipe arch bridge segment until the bottom of the clamping hoop rod 220 is placed outside the installation end of the steel pipe arch bridge segment, restricting the further downward movement of the connecting frame 210. Thus, the connecting frame 210 is clamped on the already installed steel pipe arch bridge segment through the lower ends of the clamping hoop rod 220 and the guide frame 230, providing guidance for the downward movement of the hanging frame through the connecting frame 210.

[0047] After the connecting frame 210 is clamped on the already installed steel pipe arch bridge segment, continue to lower the hoisting frame. Under the action of the self-gravity of the hoisting frame and the steel pipe arch bridge segment to be installed, the hanging frame slides downward relative to the connecting frame 210, simultaneously squeezing the damping block 253, thus squeezing the hydraulic oil in the damping hydraulic cylinder 251, and the hanging frame continues to slide downward. At this time, the check valve 260 can damp the reflux of the hydraulic oil to pressurize the hydraulic oil in the sleeve (the hydraulic oil is pressed into the pressure sleeve 241, and the damping piston rod 252 cannot move back under the action of friction), thereby further compressing the two compression springs 242, increasing the extrusion force of the pressure telescopic rod 240 acting on the first clamping rod 231 and the second clamping rod 232, further improving the stability of the connection between the connecting frame 210 and the already installed steel pipe arch bridge segment, and avoiding the shaking of the hanging frame when adjusting the posture of the steel pipe arch bridge segment to be installed. When the steel pipe arch bridge segment to be installed reaches the installation position, the cable hoisting system stops lowering the hanging frame.

[0048] Among them, during the lowering process of the connecting frame 210, since the guiding frame 230 is of a V-shaped structure, its side wall abuts against the inner side wall of the upper chord pipe at the connecting end of the already installed steel tube arch bridge segment, causing the guiding frame 230 to be self-centered and inserted into the already installed steel tube arch bridge segment, achieving the lateral rapid positioning of the lifting frame, and reducing the workload of lateral attitude adjustment of the steel tube arch bridge segment to be installed; moreover, by connecting the already installed steel tube arch bridge segment with the lifting frame through the connecting frame 210, the lateral and circumferential movements of the lifting frame are restricted, avoiding the swaying of the cables of the cable hoisting system and making it difficult to align the docking joints when adjusting the attitude of the steel tube arch bridge segment to be installed, thereby reducing the labor intensity of steel tube arch bridge segment hoisting and improving the docking efficiency and safety.

[0049] After the docking is completed, the steel tube arch bridge segment is unloaded from the lifting frame, and then the lifting frame is pulled up by the cable hoisting system. Under the action of the pulling force, the lifting frame moves upward along the limiting slide rail 211. When the connecting slider 212 slides past the damping block 253, the upward pulling of the lifting frame is paused, and the flow direction of the reversible one-way valve 260 is switched. At this time, the hydraulic oil in the pressure sleeve 241 flows back into the damping hydraulic cylinder 251 under the action of the resilience of the two compression springs 242, driving the damping block 253 to reset and reducing the pressure acting on the first clamping rod 231 and the second clamping rod 232. Then, the lifting frame is pulled up continuously to pull up the connecting frame 210 through the lifting frame and remove the connecting frame 210 from the steel tube arch bridge segment for hoisting the next segment.

[0050] In summary, this embodiment can, when the lifted steel tube arch bridge segment approaches the fixed end, realize the automatic and rapid positioning of the lifting frame through relative movement and connection with the already installed steel tube arch bridge segment, so as to reduce the labor intensity of steel tube arch bridge segment hoisting and improve the docking efficiency and safety.

[0051] The specific implementation manners described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific implementation manners of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A segment hoisting and docking positioning tooling for a steel pipe arch bridge, characterized in that Comprising: A connecting frame (210), the connecting frame (210) is used to connect the suspension frame, and when the connecting frame (210) is connected to the suspension frame, the connecting frame (210) remains vertically arranged; A clamping hoop rod (220), the clamping hoop rod (220) is installed at the lower part of the connecting frame (210), the open end of the clamping hoop rod (220) faces downward, and the clamping hoop rod (220) can be clamped outside the installation end of the installed steel pipe arch bridge segment; A guiding frame (230), the guiding frame (230) is installed at the lower part of the connecting frame (210), the guiding frame (230) is located in the middle of the opening of the clamping hoop rod (220), and the guiding frame (230) is of a V-shaped structure; A damping and limiting assembly (250), the damping and limiting assembly (250) is installed on the connecting frame (210), and the damping and limiting assembly (250) is located at the initial end of the sliding path of the suspension frame; Wherein, under the action of the self-weight of the steel pipe arch bridge segment, the installation end of the steel pipe arch bridge segment can be clamped between the clamping hoop rod (220) and the lower end of the guiding frame (230), and the suspension frame can slide downward relative to the connecting frame (210) overcoming the damping of the damping and limiting assembly (250).

2. The segment hoisting and docking positioning tooling for a steel pipe arch bridge according to claim 1, wherein, The connecting frame (210) is provided with: Limit sliding rails (211), there are two limit sliding rails (211), and the two limit sliding rails (211) are respectively arranged on both sides of the connecting frame (210); Connecting sliders (212), the connecting sliders (212) can be slidably clamped outside the two limit sliding rails (211), and the connecting sliders (212) are used to connect the suspension frame.

3. The segment hoisting and docking positioning tooling for steel pipe arch bridges according to claim 2, wherein The upper end of the guiding frame (230) is provided with: A first clamping rod (231), the upper end of the first clamping rod (231) is hinged to the corresponding side of the lower end of the connecting frame (210); A second clamping rod (232), the upper end of the second clamping rod (232) is hinged to the corresponding other side of the lower end of the connecting frame (210) A pressure telescopic rod (240), both ends of the pressure telescopic rod (240) are respectively hinged to the lower ends of the first clamping rod (231) and the second clamping rod (232); Wherein, in the installation state, the pressure telescopic rod (240) drives the lower ends of the first clamping rod (231) and the second clamping rod (232) to move relatively away from each other.

4. The segment hoisting and docking positioning tooling for steel pipe arch bridges according to claim 3, characterized in that, The pressure telescopic rod (240) includes: A pressure sleeve (241), a compression spring (242) is fitted inside the pressure sleeve (241); A first pressing rod (243), one end of the first pressing rod (243) is hinged to one end of the first clamping rod (231) relative to the connecting frame (210), and the other end is slidably inserted into the pressure sleeve (241); A second pressing rod (244), one end of the second pressing rod (244) is hinged to one end of the second clamping rod (232) relative to the connecting frame (210), and the other end is slidably inserted into the pressure sleeve (241); Among them, in the positioning state, the compression spring (242) is squeezed by the first pressing rod (243) and the second pressing rod (244).

5. The segment hoisting and docking positioning tooling for a steel pipe arch bridge according to claim 4, characterized in that, There are two compression springs (242), and two pressure equalizing pistons (245) are fitted in the pressure sleeve (241). The two pressure equalizing pistons (245) are located between the two compression springs (242), and the cavity between the two pressure equalizing pistons (245) is filled with hydraulic oil; The damping limit component (250) includes a damping hydraulic cylinder (251), a damping piston rod (252) and a damping block (253). The piston section of the damping piston rod (252) is inserted into the damping hydraulic cylinder (251), and the damping block (253) is installed at the outer end of the damping piston rod (252). The side of the damping block (253) away from the damping piston rod (252) is an inclined surface sloping downward, and the damping block (253) is located on the sliding path of the connecting slider (212); Among them, the length direction of the damping piston rod (252) is perpendicular to the length direction of the connecting frame (210), and the liquid outlet end of the damping hydraulic cylinder (251) is communicated with the cavity between the two pressure equalizing pistons (245) through a reversible one-way valve (260).

6. The segment hoisting and butt joint positioning tooling for a steel pipe arch bridge according to claim 5, characterized in that, The reversible one-way valve (260) includes: A reversing valve body (261) provided with a communication channel; A reversing valve core (262) provided with a one-way flow component (263). The one-way flow component (263) is arranged in the communication channel to switch the conduction direction of the one-way flow component (263) by rotating the reversing valve core (262).

7. The segment hoisting and docking positioning tooling for a steel tube arch bridge according to claim 6, characterized in that, The one-way flow component (263) is a ball-type one-way valve.

8. The segment hoisting and butt joint positioning tooling for steel pipe arch bridges according to claim 5, characterized in that, The effective cross-sectional area of the pressure equalizing piston (245) is larger than the effective cross-sectional area of the piston of the damping piston rod (252).

9. The segment hoisting and docking positioning tooling for a steel pipe arch bridge according to any one of claims 3 to 8, characterized in that, A sliding pad is arranged on the outer side wall of the guiding frame (230), and the sliding pad is made of polytetrafluoroethylene.

10. The segment hoisting and docking positioning tooling for a steel pipe arch bridge according to any one of claims 1 to 8, characterized in that, The clamping hoop rod (220) is in a U-shape with the opening facing downward.

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