Steel tube arch bridge segment hoisting posture circumferential adjusting mechanism

Abstract

The utility model discloses a circumferential adjusting mechanism for hoisting postures of steel tube arch bridge sections, and relates to the technical field of steel tube arch bridge construction equipment. Comprising a hanging connection assembly, the hanging connection assembly comprises a hanging connection frame and a circumferential adjustment linear driver, the upper side of the hanging connection frame is used for being fixedly connected with one transverse side of a hanging connection frame, and the lower side of the hanging connection frame is used for being hinged to an upper chord pipe of a to-be-installed steel pipe arch bridge section; one end of the cycle adjustment linear driver is used for being hinged to the other transverse side of the hanging frame, and the other end of the cycle adjustment linear driver is used for hanging another upper chord tube of the steel tube arch bridge section to be installed; the limiting tool is used for being connected with one longitudinal side of the lifting frame, and the limiting tool can limit transverse movement of the lifting frame; wherein in the process that the hoisting frame hoists the to-be-mounted steel tube arch bridge section to move downwards to the mounting station, the limiting tool is clamped to the connecting end of the mounted steel tube arch bridge section. According to the utility model, the circumferential posture of the steel tube arch bridge section can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe arch bridge construction equipment, and particularly relates to a circumferential adjustment mechanism for the hoisting attitude of steel pipe arch bridge segments. Background Technique

[0002] A steel pipe arch bridge refers to a concrete-filled steel pipe arch bridge, and its arch part is spliced by steel pipe trusses. In the prior art, the butt joints of the steel pipe arch ribs are connected in the form of bolt connection with internal flange plates and external welding of pipes, and self-compacting shrinkage-compensating 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.

[0003] During the butt joint process of the steel pipe arch bridge segments, it is required that the four ports at the connection end of the installed steel pipe arch bridge segment correspond to the four ports at the connection end of the steel pipe arch bridge segment to be installed one by one, that is, circumferential alignment is required. However, the cable hoisting crane of the cable hoisting system can only achieve vertical lifting and longitudinal movement along the length direction of the cable. Circumferential alignment is often achieved by manual dragging. Moreover, during the dragging process, after the circumferential adjustment of the steel pipe arch bridge segment, the center of gravity of the steel pipe arch bridge segment is deflected. This not only has a high labor intensity and low personnel safety (after the center of gravity of the steel pipe arch bridge segment is deflected, corresponding pulling force or supporting force needs to be provided to keep the steel pipe arch bridge segment in the adjusted attitude), but also has a low docking efficiency. Content of the Utility Model

[0004] Aiming at the technical problem that circumferential alignment needs to be carried out by manual dragging during the hoisting and butt joint of the existing steel pipe arch bridge segments; the utility model provides a circumferential adjustment mechanism for the hoisting attitude of steel pipe arch bridge segments, which can automatically adjust the circumferential attitude of the steel pipe arch bridge segments, so as to reduce the labor intensity of hoisting the steel pipe arch bridge segments, and improve the docking efficiency and safety.

[0005] The utility model is realized through the following technical solutions:

[0006] The utility model provides a circumferential adjustment mechanism for the hoisting attitude of steel pipe arch bridge segments, including: a hoisting component, the hoisting component includes a hoisting frame and a circumferential adjustment linear driver. The upper side of the hoisting frame is used for fixedly connecting with one side of the hoisting frame transversely, and the lower side is used for hingedly connecting with an upper chord pipe of the steel pipe arch bridge segment to be installed. One end of the circumferential adjustment linear driver is used for hingedly connecting with the other side of the hoisting frame transversely, and the other end is used for hoisting the other upper chord pipe of the steel pipe arch bridge segment to be installed; a limiting tooling, the limiting tooling is used for connecting with one side of the hoisting frame longitudinally, and the limiting tooling can limit the transverse movement of the hoisting frame; wherein, during the process that the hoisting frame hoists the steel pipe arch bridge segment to be installed and moves downward to the installation position, the limiting tooling can be clamped at the connection end of the installed steel pipe arch bridge segment.

[0007] The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment provided by the present utility model includes a hoisting assembly and a limiting tooling. The hoisting assembly includes a hoisting frame and a circumferential adjustment linear driver. During use, the hoisting frame is connected to the cable of the cable hoisting system, the upper side of the hoisting frame is fixedly connected to one side of the hoisting frame transversely, the upper end of the circumferential adjustment linear driver is hinged to the other side of the hoisting frame transversely, one upper chord tube of the steel pipe arch bridge segment to be installed is hinged to the lower side of the hoisting frame, and the other upper chord tube is hoisted at the lower end of the circumferential adjustment linear driver. Then, the steel pipe arch bridge segment to be installed is hoisted above the connection end of the already installed steel pipe arch bridge segment by the cable hoisting system, so that the lower part of the limiting tooling is directly opposite to the space between the two upper chord tubes at the connection end of the already installed steel pipe arch bridge segment. The steel pipe arch bridge segment to be installed is lowered by the cable hoisting system, so that the limiting tooling is clamped at the connection end of the already installed steel pipe arch bridge segment, so as to horizontally limit the hoisting frame through the limiting tooling.

[0008] Since the circumferential adjustment linear driver can automatically adjust the distance between the lower side and the hoisting frame, when it is necessary to adjust the circumferential attitude of the steel pipe arch bridge segment to be installed, by the telescopic movement of the circumferential adjustment linear driver, the steel pipe arch bridge segment rotates circumferentially around the lower side of the hoisting frame, so as to adjust the circumferential attitude of the steel pipe arch bridge segment to be installed. During the adjustment process, the limiting tooling provides a horizontal pulling force or supporting force, so that the steel pipe arch bridge segment maintains the adjusted attitude, thereby 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 steel pipe arch bridge segment to be installed, reducing the labor intensity of the hoisting of the steel pipe arch bridge segment, and improving the docking efficiency and safety.

[0009] In an optional embodiment, two hoisting hoops are arranged on the lower side of the hoisting frame, and the two hoisting hoops are arranged at intervals longitudinally. The upper end of the hoisting hoop is hinged to the hoisting frame, and the lower end is used to connect the end of the corresponding upper chord tube of the steel pipe arch bridge segment to be installed, so as to facilitate the hinging of the steel pipe arch bridge segment to be installed and the hoisting frame.

[0010] In an optional embodiment, the hoisting frame includes a first hoisting rod and a second hoisting rod arranged vertically. The upper ends of the first hoisting rod and the second hoisting rod are both used to be fixedly connected to the hoisting frame, and the lower ends are respectively connected to the corresponding hoisting hoops. Moreover, the length of the second hoisting rod can be adjusted, so as to adjust the longitudinal attitude of the steel pipe arch bridge segment to be installed by adjusting the second hoisting rod, and at the same time, it can also be adapted to the steel pipe arch bridge segments with different inclination angles / radian, ensuring that all segments in the middle of the steel pipe arch bridge can be hoisted.

[0011] In an optional embodiment, a turnbuckle is arranged in the middle of the second hoisting rod, so as to adjust the length of the second hoisting rod by rotating the turnbuckle cable, so as to facilitate the rapid and accurate control of the length of the second hoisting rod.

[0012] In an alternative embodiment, the weekly-adjusted linear actuator is a hydraulic cylinder.

[0013] In an alternative embodiment, the limit tooling includes: a connecting frame for connecting the lifting frame, and when the connecting frame is connected to the lifting frame, the connecting frame remains vertically arranged; a clamping hoop rod installed at the lower part of the connecting frame, with the open end of the clamping hoop rod facing downwards, and the clamping hoop rod can be clamped outside the installation end of the installed steel pipe arch bridge segment; a guiding frame installed at the lower part of the connecting frame, located in the middle of the opening of the clamping hoop rod, and the guiding frame is a V-shaped structure; a damping limit component installed on the connecting frame and located at the initial end of the sliding path of the lifting 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 lower end of the guiding frame, and the lifting frame can slide downward relative to the connecting frame against the damping of the damping limit component.

[0014] During use, the lifting frame is connected to the cable of the cable hoisting system, the connecting frame is installed on the lifting frame, and the connecting frame is kept in a vertical state (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 is kept in a level state so that the connecting frame remains vertical). The steel pipe arch bridge segment to be installed is hoisted onto the lifting frame through 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. 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 faces the space between 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.

[0015] Since the guide frame is V-shaped, installed at the bottom of the connecting frame and located in the middle of the opening of the clamping hoop rod, during the process of lowering the steel tube arch bridge segment to be installed by the cable lifting system, the lower end of the guide frame is first inserted between the two upper chord tubes of the connecting end of the installed steel tube arch bridge segment, and as the lowering proceeds, the side wall of the guide frame contacts the inner wall of the upper chord tube of the connecting end of the installed steel tube arch bridge segment, thereby playing a guiding role, so that the guide frame is self-centeringly inserted into the installed steel tube arch bridge segment until the clamping hoop rod is clamped outside the installation end of the steel tube arch bridge segment, thereby clamping the connecting frame on the installed steel tube arch bridge segment through the clamping hoop rod and the lower end of the guide frame, so as to provide guidance for the downward movement of the lifting frame through the connecting frame. After the connecting frame is clamped on the installed steel tube arch bridge segment, the hoisting frame is lowered further. Under the action of the gravity of the hoisting frame and the steel tube arch bridge segment to be installed, the connecting frame slides downward relative to the connecting frame, overcoming the damping of the damping limit assembly, and finally reaches the installation position.

[0016] Among them, during the process of lowering the connecting frame, since the guide frame is a V-shaped structure, its side wall conflicts with the inner wall of the upper chord tube of the connecting end of the installed steel tube arch bridge segment, so that the guide frame is self-centeringly inserted into the installed steel tube arch bridge segment, realizing the lateral rapid positioning of the lifting frame, which can reduce the workload of lateral posture adjustment of the steel tube arch bridge segment to be installed.

[0017] In an optional embodiment, the connecting frame is provided with: a limiting slide rail, two limiting slide rails are provided, and the two limiting slide rails are arranged on both sides of the connecting frame; a connecting slider, the connecting slider can be slidably clamped outside the two limiting slide 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, thereby avoiding the hanging frame from moving in other directions when adjusting the posture of the steel tube arch bridge segment.

[0018] In an optional embodiment, the upper end of the guide frame is provided with: a first clamping rod, the upper end of the first clamping rod is hinged to one side corresponding to the lower end of the connecting frame; a second clamping rod, the upper end of the second clamping rod is hinged to the other side corresponding to the lower end of the connecting frame, and the two ends of the pressure telescopic rod are respectively hinged to the lower ends of the first clamping rod and the second clamping rod; wherein, in the installed state, the pressure telescopic rod drives the lower ends of the first clamping rod and the second clamping rod to move relatively apart, so as to drive the first clamping rod and the second clamping rod and the clamping hoop rod to clamp the installed steel tube arch bridge segment through the pressure telescopic rod, thereby ensuring the stability of the connection between the connecting frame and the installed steel tube arch bridge segment.

[0019] 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 the first pressing rod is hinged to one end of the first clamping rod to the connecting frame, and the other end is slidably inserted into the pressure sleeve; a second pressing rod, one end of the second pressing rod is hinged to one end of the second clamping rod to the connecting frame, and the other end 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.

[0020] 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 and 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, the side of the damping block away from the damping piston rod is an inclined surface sloping downward, 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.

[0021] Thus, when the connecting frame is clamped on the installation end of the already installed steel tube arch bridge section, the steel tube arch bridge section to be installed is lowered by a crane. Under the action of the self-weight of the steel tube arch bridge section 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 prevent the hydraulic oil from flowing back, so as to pressurize the hydraulic oil in the sleeve, further compress the two compression springs, increase the squeezing force of the pressure telescopic rod on the first clamping rod and the second clamping rod, and further improve the stability of the connection between the connecting frame and the already installed steel tube arch bridge section, and avoid the hanging frame from shaking when adjusting the posture of the steel tube arch bridge section to be installed.

[0022] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0023] The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment provided by the utility model includes a hoisting assembly and a limiting tooling. The hoisting assembly includes a hoisting frame and a circumferential adjustment linear actuator. The upper side of the hoisting frame is used for fixedly connecting with one side of the hoisting frame transversely, and the lower side is used for hingedly connecting with an upper chord pipe of the steel pipe arch bridge segment to be installed. One end of the circumferential adjustment linear actuator is used for hingedly connecting with the other side of the hoisting frame transversely, and the other end is used for hoisting the other upper chord pipe of the steel pipe arch bridge segment to be installed. The limiting tooling is used for connecting with one side of the hoisting frame longitudinally, and the limiting tooling can limit the transverse movement of the hoisting frame. When it is necessary to adjust the circumferential attitude of the steel pipe arch bridge segment to be installed, through the telescopic movement of the circumferential adjustment linear actuator, the steel pipe arch bridge segment rotates circumferentially around the lower side of the hoisting frame, so as to adjust the circumferential attitude of the steel pipe arch bridge segment to be installed. During the adjustment process, the limiting tooling provides a transverse pulling force or supporting force, so that the steel pipe arch bridge segment maintains the adjusted attitude. Furthermore, when adjusting the attitude of the steel pipe arch bridge segment to be installed, the cables of the cable hoisting system are prevented from swinging and it is difficult to align the docking joints. Therefore, the utility model reduces the labor intensity of hoisting the steel pipe arch bridge segment, and improves the docking efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0025] In the drawings:

[0026] Figure 1 is the front view structure diagram after the circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment of the embodiment of the present utility model is connected with the hoisting frame;

[0027] Figure 2 is the side view structure diagram of the limiting tooling of the embodiment of the present utility model;

[0028] Figure 3 is the structural schematic diagram of the pressure telescopic rod of the embodiment of the present utility model;

[0029] Figure 4 is the structural schematic diagram of the damping limiting component of the embodiment of the present utility model;

[0030] Figure 5 is the structural schematic diagram of the reversible one-way valve of the embodiment of the present utility model.

[0031] Marks in the drawings and corresponding component names:

[0032] 100 - Suspension frame, 200 - Positioning tooling, 210 - Connecting frame, 211 - Positioning slide rail, 212 - Connecting slider, 220 - Clamping hoop rod, 230 - Guide frame, 231 - First clamping rod, 232 - Second clamping rod, 240 - Pressure expansion rod, 241 - Pressure sleeve, 242 - Compression spring, 243 - First pressing rod, 244 - Second pressing rod, 245 - Pressure equalizing piston, 250 - Damping positioning component, 251 - Damping hydraulic cylinder, 252 - Damping piston rod, 253 - Damping block, 260 - Reversible one - way valve, 261 - Reversing valve body, 262 - Reversing valve core, 263 - One - way flow component, 511 - Suspension hoop, 512 - First suspension rod, 513 - Second suspension rod, 520 - Circumferential adjustment linear actuator. Detailed implementation manners

[0033] 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. Obviously, 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.

[0034] 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 accompanying drawings, or the orientation or positional relationship in which the product of this application is usually 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, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0035] At the same time, the terms "set", "installed", "connected" and "connected" 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 it can be the communication inside 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 situations.

[0036] Embodiment:

[0037] Combined with Figure 1, this embodiment provides a circumferential adjustment mechanism for the hoisting attitude of a steel pipe arch bridge segment, including: a hoisting assembly, the hoisting assembly includes a hoisting frame and a circumferential adjustment linear actuator 520. The upper side of the hoisting frame is used for fixedly connecting with one side of the hoisting frame 100 in the transverse direction, and the lower side is used for hinging with an upper chord pipe of the steel pipe arch bridge segment to be installed. One end of the circumferential adjustment linear actuator 520 is used for hinging with the other side of the hoisting frame 100 in the transverse direction, and the other end is used for hoisting the other upper chord pipe of the steel pipe arch bridge segment to be installed; a limiting tooling 200, the limiting tooling 200 is used for connecting with one side of the hoisting frame 100 in the longitudinal direction, and the limiting tooling 200 can limit the transverse movement of the hoisting frame 100; wherein, during the process of the hoisting frame 100 hoisting the steel pipe arch bridge segment to be installed and moving downward to the installation station, the limiting tooling 200 can be clamped at the connection end of the already installed steel pipe arch bridge segment.

[0038] To facilitate the connection between the hoisting frame and the hoisting hoop 511, two hoisting hoops 511 are arranged on the lower side of the hoisting frame. The two hoisting hoops 511 are arranged at intervals longitudinally. The upper end of the hoisting hoop 511 is hinged with the hoisting frame, and the lower end is used for connecting the end of the corresponding upper chord pipe of the steel pipe arch bridge segment to be installed, so as to facilitate the hinging of the steel pipe arch bridge segment to be installed with the hoisting frame.

[0039] In this embodiment, the hoisting frame includes a first hoisting rod 512 and a second hoisting rod 513 arranged vertically. The upper ends of the first hoisting rod 512 and the second hoisting rod 513 are both used for fixedly connecting with the hoisting frame 100, and the lower ends are respectively connected with the corresponding hoisting hoops 511. And the length of the second hoisting rod 513 can be adjusted to adjust the longitudinal attitude of the steel pipe arch bridge segment to be installed by adjusting the second hoisting rod 513. At the same time, it can also be adapted to steel pipe arch bridge segments with different inclination angles / radian, ensuring that all segments in the middle of the steel pipe arch bridge can be hoisted.

[0040] For the adjustment of the length of the second hoisting rod 513, the second hoisting rod 513 can be divided into two sections and realized by the way of screwing the two sections. In this embodiment, a turnbuckle is arranged in the middle of the second hoisting rod 513 to adjust the length of the second hoisting rod 513 by rotating the turnbuckle cable, so as to quickly and accurately control the length of the second hoisting rod 513.

[0041] For the circumferential adjustment linear actuator 520, a hydraulic cylinder is usually adopted to ensure that the circumferential adjustment linear actuator 520 can provide sufficient torque.

[0042] Combined with Figure 2, in this embodiment, the limit tooling 200 includes: a connecting frame 210 for connecting the hanging frame 100, and when the connecting frame 210 is connected to the hanging frame 100, the connecting frame 210 is kept vertically arranged; a clamping hoop rod 220 installed at the lower part of the connecting frame 210, with the open end of the clamping hoop rod 220 facing downwards, and the clamping hoop rod 220 can be clamped outside the installation end of the installed steel tube arch bridge segment; a guiding frame 230 installed at the lower part of the connecting frame 210, with the guiding frame 230 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 limit assembly 250 installed on the connecting frame 210, and the damping limit assembly 250 is located at the initial end of the sliding path of the hanging frame 100; wherein, under the action of the self-weight of the steel tube arch bridge segment, the installation end of the steel tube arch bridge segment can be clamped between the clamping hoop rod 220 and the upper end of the guiding frame 230, and the hanging frame 100 can slide downward relative to the connecting frame 210 against the damping of the damping limit assembly 250.

[0043] Specifically, the connecting frame 210 is provided with: two limit sliding rails 211, which are arranged on both sides of the connecting frame 210; a connecting slider 212 that can be slidably clamped outside the two limit sliding rails 211, and the connecting slider 212 is used to connect the hanging frame 100, so that the hanging frame 100 can only slide relative to the connecting frame 210, avoiding the hanging frame 100 moving in other directions when adjusting the attitude of the steel tube arch bridge segment. It can be understood that there are only limit parts at both ends of the limit sliding rail 211 to prevent the connecting slider 212 from slipping off the limit sliding rail 211.

[0044] For the clamping hoop rod 220, in this embodiment, the clamping hoop rod 220 is in a U-shape with the open end facing downwards to ensure the stability when the connecting frame 210 clamps the installed steel tube arch bridge segment.

[0045] Generally, a sliding pad is arranged on the outer side wall of the guiding frame 230, and the sliding pad is made of polytetrafluoroethylene to utilize the self-lubricating property of polytetrafluoroethylene to reduce the friction between the guiding frame 230 and the installed steel tube arch bridge segment.

[0046] On this basis, the upper end of the guide 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 expansion rod 240, both ends of the pressure expansion 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 expansion 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 section with the clamping hoop rod 220 through the pressure expansion rod 240, ensuring the stability of the connection between the connecting frame 210 and the installed steel tube arch bridge section.

[0047] Combined with Figure 3 , the pressure expansion 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 expansion rod 240 can contract when being squeezed.

[0048] Combined with Figure 3 and Figure 4 , to ensure the stability of the connection between the connecting frame 210 and the installed steel tube arch bridge section, 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 an inclined surface sloping downward, 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.

[0049] 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 100 slides downward relative to the connecting frame 210, and at the same time presses the damping block 253, thereby squeezing the hydraulic oil in the damping hydraulic cylinder 251. As the hanging frame 100 continues to slide downward, the normally-reversing check valve 260 can prevent the hydraulic oil from flowing back, so as to pressurize the hydraulic oil in the sleeve, further compress the two compression springs 242, and increase the extrusion force exerted by the pressure telescopic rod 240 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 100 when adjusting the attitude of the steel pipe arch bridge segment to be installed.

[0050] 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 magnify 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.

[0051] Combined with Figure 5 , the normally-reversing check 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.

[0052] Preferably, the one-way flow component 263 is a ball check valve to ensure sufficient reliability of the normally-reversing check valve 260.

[0053] It should be noted that for the circumferential adjustment mechanism of the lifting attitude of the steel pipe arch bridge segment provided in this embodiment, during use, the hanging frame 100 is connected to the cable of the cable hoisting system, the upper side of the hanging frame is fixedly connected to one side of the hanging frame 100 transversely, the upper end of the circumferential adjustment linear actuator 520 is hinged to the other side of the hanging frame 100 transversely, and one upper chord tube of the steel pipe arch bridge segment to be installed is hinged to the lower side of the hanging frame, and the other upper chord tube is hoisted at the lower end of the circumferential adjustment linear actuator 520. Then, the steel pipe arch bridge segment to be installed is hoisted above the connection end of the installed steel pipe arch bridge segment by the cable hoisting system, so that the lower part of the limit tooling 200 is directly opposite to the space between the two upper chord tubes at the connection end of the installed steel pipe arch bridge segment. The steel pipe arch bridge segment to be installed is lowered by the cable hoisting system, so as to clamp the limit tooling 200 on the connection end of the installed steel pipe arch bridge segment, so as to horizontally limit the hanging frame 100 through the limit tooling 200.

[0054] 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 clamp rod 220, in the process of the cable lifting system lowering the steel tube arch bridge segment to be installed, the lower end of the guide frame 230 is first inserted between the two upper chord tubes of the connecting end of the installed steel tube arch bridge segment, and as the lowering proceeds, the side wall of the guide frame 230 contacts the inner wall of the upper chord tube of the connecting end of the installed steel tube arch bridge segment, thereby playing a guiding role, so that the guide frame 230 is self-centeringly inserted into the installed steel tube arch bridge segment.

[0055] Furthermore, 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 tubes at the connecting end of the installed steel tube arch bridge segment, and the upper ends of the first clamping rod 231 and the second clamping rod 232 rotate inward, and the pressure telescopic rod 240 is compressed by the gravity of the hanging frame 100 and the steel tube arch bridge segment to be installed, so that the spring in the pressure telescopic rod 240 provides a reaction force, outputs a top pressure to the first clamping rod 231 and the second clamping rod 232, and clamps the installed steel tube 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 installed steel tube arch bridge segment, until the bottom of the clamping hoop rod 220 is built outside the installation end of the steel tube arch bridge segment, limiting the connection frame 210 from continuing to move downward. Thus, the connecting frame 210 is clamped on the installed steel pipe arch bridge segment through the clamping hoop rod 220 and the lower end of the guide frame 230, so as to provide guidance for the downward movement of the hanging frame 100 through the connecting frame 210.

[0056] After the connecting frame 210 is clamped on the installed steel pipe arch bridge segment, the hoisting frame is further lowered. Under the gravity of the hoisting frame and the steel pipe arch bridge segment to be installed, the hoisting frame 100 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 hoisting frame 100 continues to slide downward. At this time, the reversible one-way valve 260 can damp the hydraulic oil backflow 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 squeezing force of the pressure telescopic rod 240 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 hoisting frame 100 when adjusting the posture of the steel pipe arch bridge segment to be installed. When the steel tube arch bridge segment to be installed reaches the installation position, the cable hoisting system stops lowering the hoisting frame 100.

[0057] When the circumferential posture of the steel tube arch bridge segment to be installed needs to be adjusted, the circumferential adjustment linear drive 520 is extended and retracted to make the steel tube arch bridge segment rotate circumferentially around the lower side of the hanging frame, thereby adjusting the circumferential posture of the steel tube arch bridge segment to be installed.

[0058] 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 pipe arch bridge segment, enabling the guiding frame 230 to be self-centered and inserted into the already installed steel pipe arch bridge segment, achieving the lateral rapid positioning of the lifting frame, and reducing the workload of adjusting the lateral attitude of the steel pipe arch bridge segment to be installed.

[0059] In addition, during the adjustment process, a lateral pulling force or supporting force is provided by the limiting tooling 200, enabling the steel pipe arch bridge segment to maintain the adjusted attitude, thereby 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, thus reducing the labor intensity of hoisting the steel pipe arch bridge segment and improving the docking efficiency and safety.

[0060] After the docking is completed, the steel pipe arch bridge segment is unloaded from the lifting frame 100, and then the lifting frame 100 is pulled up by the cable hoisting system. Under the action of the pulling force, the lifting frame 100 moves upward along the limiting slide rail 211. When the connecting slider 212 slides past the damping block 253, the pulling up of the lifting frame 100 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 100 is pulled up continuously to pull up the connecting frame 210 through the lifting frame 100, and the connecting frame 210 is removed from the steel pipe arch bridge segment for the hoisting of the next segment.

[0061] In summary, the circumferential attitude adjustment mechanism for hoisting the steel pipe arch bridge segment provided in this embodiment can automatically adjust the circumferential attitude of the steel pipe arch bridge segment, reducing the labor intensity of hoisting the steel pipe arch bridge segment and improving the docking efficiency and safety.

[0062] The specific implementation manners described above further elaborate 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 principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circumferential adjustment mechanism for the hoisting attitude of a steel pipe arch bridge segment, characterized in that Comprising: A suspension connection assembly, the suspension connection assembly including a suspension connection frame and a circumferential adjustment linear drive (520), the upper side of the suspension connection frame being used for fixedly connecting to one side of the suspension connection frame (100) transversely, and the lower side being used for hingedly connecting to an upper chord tube of a steel pipe arch bridge segment to be installed. One end of the circumferential adjustment linear drive (520) is used for hingedly connecting to the other side of the suspension connection frame (100) transversely, and the lower end is used for suspending another upper chord tube of the steel pipe arch bridge segment to be installed; A limit tooling (200), the limit tooling (200) being used for connecting to one side of the suspension connection frame (100) longitudinally, and the limit tooling (200) being able to limit the transverse movement of the suspension connection frame (100); Wherein, during the process of the suspension connection frame (100) lifting the steel pipe arch bridge segment to be installed and moving downward to the installation station, the limit tooling (200) can be clamped to the connection end of the already installed steel pipe arch bridge segment.

2. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 1, wherein Two suspension connection hoops (511) are provided on the lower side of the suspension connection frame. The two suspension connection hoops (511) are arranged at intervals longitudinally. The upper end of the suspension connection hoop (511) is hingedly connected to the suspension connection frame, and the lower end is used for connecting to the end of the corresponding upper chord tube of the steel pipe arch bridge segment to be installed.

3. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 2, wherein The suspension connection frame includes a vertically arranged first suspension connection rod (512) and a second suspension connection rod (513). The upper ends of the first suspension connection rod (512) and the second suspension connection rod (513) are both used for fixedly connecting to the suspension connection frame (100), and the lower ends are respectively connected to the corresponding suspension connection hoops (511). Moreover, the length of the second suspension connection rod (513) can be adjusted.

4. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 3, characterized in that, A turnbuckle is arranged in the middle of the second suspension connection rod (513) to adjust the length of the second suspension connection rod (513) by rotating the turnbuckle cable.

5. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 1, characterized in that, The circumferential adjustment linear drive (520) is a hydraulic cylinder.

6. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 1, wherein The limit tooling (200) includes: A connection frame (210), the connection frame (210) being used for connecting the suspension connection frame (100), and when the connection frame (210) is connected to the suspension connection frame (100), the connection frame (210) remains vertically arranged; A clamping hoop rod (220), the clamping hoop rod (220) being installed at the lower part of the connection 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 already installed steel pipe arch bridge segment; A guide frame (230), the guide frame (230) being installed at the lower part of the connection frame (210). The guide frame (230) is located in the middle of the opening of the clamping hoop rod (220), and the guide frame (230) is a V-shaped structure; A damping limit assembly (250), the damping limit assembly (250) being installed on the connection frame (210), and the damping limit assembly (250) being located at the initial end of the sliding path of the suspension connection frame (100); Among them, 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 lower ends of the clamping hoop rod (220) and the guiding frame (230), and the hanging frame (100) can slide downward relative to the connecting frame (210) overcoming the damping of the damping limiting component (250).

7. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 6, characterized in that, 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 hanging frame (100).

8. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 7, characterized in that, 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), the two 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); Among them, 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.

9. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 8, characterized in that, 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 the 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 the end of the second clamping rod (232) facing 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).

10. The circumferential adjustment mechanism for the hoisting attitude of the steel pipe arch bridge segment according to claim 9, 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). The damping block (253) is installed at the outer end of the damping piston rod (252). One side of the damping block (253) away from the damping piston rod (252) is an inclined plane 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 equalizing pistons (245) through a reversible one-way valve (260).

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