Lead screw type stepping pushing device

Abstract

The utility model relates to the technical field of steel bridge pushing construction, and discloses a lead screw type stepping pushing device which is composed of a stepping system, a deviation rectifying system and a jacking system. The deviation rectifying system is arranged above the stepping system, so that deviation rectifying in the transverse bridge direction can be effectively carried out while the beam body is guided in the bridge direction. The jacking system is installed on the upper portion of the deviation rectifying system through a deviation rectifying sliding table, and height adjustment of the jacking system is mainly completed through a jacking oil cylinder in the jacking system. An executing mechanism of the lead screw type stepping pushing device is mainly a stepping system, and a stepping sliding table is pushed through the stepping system so as to drive a beam body to move. The three systems work cooperatively, pushing construction is carried out in a reciprocating circulation mode according to the four steps of jacking, translation, beam falling and return stroke, independent movement, accurate adjustment and vertical jacking of a steel box beam in the bridge direction, the bridge transverse direction and the vertical direction can be achieved, and an efficient, accurate and safe solution is provided for pushing construction of a steel bridge.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bridge jacking construction, and in particular relates to a screw-type step-by-step jacking device. Background Art

[0002] The construction environment, technical requirements and construction control of the top-pushing method are very different from those of the support method, hoisting method, rotation method and cantilever method. There are two common top-pushing methods: the dragging method and the walking method, and they are used in more and more bridge structure types.

[0003] In bridge construction and other large-scale structural installation projects, walking jacking devices are widely used to push and position heavy objects, such as steel box girders. These devices achieve precise movement, adjustment and jacking of steel box girders in the longitudinal, transverse and vertical directions of the bridge through the coordinated work of the walking system, the correction system and the jacking system. However, existing walking jacking devices face challenges in precision control during construction. Any slight deviation may lead to inaccurate structural installation, which in turn affects the quality and safety of the entire project.

[0004] Therefore, in order to solve this problem, it is necessary to develop a new type of walking type jacking device, which can provide higher precision control and adjustment to ensure the accuracy of structural installation, improve engineering quality and construction safety. Such a utility model will help overcome the limitations of existing technologies and promote the advancement of bridge construction technology. Utility Model Content

[0005] The utility model provides a screw-type step-by-step jacking device, which realizes high-efficiency linear motion conversion through the rolling friction characteristics of the screw, and improves construction efficiency and precision. At the same time, through the coordinated work of the correction system and the jacking system, the precise control and adjustment of the beam body during the construction process is ensured, and the quality and safety of the project are improved; the design and application of this device is expected to overcome the limitations of the existing technology and promote the advancement of bridge construction technology. The specific technical solution is as follows:

[0006] A screw-type stepping jacking device, which consists of a stepping system, a correction system and a lifting system. The correction system is arranged above the stepping system, which can effectively correct the cross-bridge direction while guiding the beam body along the bridge. The lifting system is installed on the upper part of the correction system through a correction slide, and its height adjustment is mainly completed by the lifting cylinder inside it. The actuator of the screw-type stepping jacking device is mainly the stepping system, which pushes the stepping slide through the system, thereby driving the beam body to move.

[0007] The preferred embodiment of the screw-type stepping jacking device is that the stepping system is composed of a stepping platform, a stepping screw, a stepping nut, a stepping motor, a stepping guide rail and a stepping slide;

[0008] The top of the stepping platform is provided with a stepping guide rail and a stepping slide in sequence, and the stepping slide is arranged on the stepping guide rail, and the lower end surface of the stepping platform is fixedly connected to the upper end surface of the pier;

[0009] The stepping platform is provided with a stepping screw, a stepping nut and a stepping motor. The stepping motor drives the stepping screw to rotate, and through cooperation with the stepping nut, the rotational motion is converted into linear motion, thereby driving the stepping slide to move along the stepping guide rail, carrying and pushing the steel box girder to move along the bridge direction.

[0010] The preferred embodiment of the screw-type stepping push device is that the correction system includes a correction base, a correction screw, a correction nut, a correction motor, a correction guide rail and a correction slide;

[0011] The top of the deflection correction platform is provided with a deflection correction guide rail and a deflection correction slide in sequence, and the deflection correction slide is arranged on the deflection correction guide rail.

[0012] The lower end of the correction base is fixedly connected to the upper end surface of the stepping slide. The correction base is equipped with a correction screw, a correction nut and a correction motor. The correction motor drives the correction screw to rotate, and through cooperation with the correction nut, the rotational motion is converted into linear motion, thereby driving the correction slide to move along the correction guide rail, adjusting the upward position of the steel box girder on the cross bridge, and ensuring the accuracy of the jacking process.

[0013] The described screw-type step-by-step jacking device, its preferred embodiment is that the jacking system is mainly composed of a jacking pedestal and a jacking cylinder, the lower end surface of the jacking pedestal is fixedly connected to the upper end surface of the correction slide, the jacking cylinder is installed on the jacking pedestal, and the cylinder piston is pushed by hydraulic action to generate an upward thrust, thereby realizing the vertical lifting of the steel box girder.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model adopts synchronous balance control technology to ensure that the composite bridge steel structure is evenly stressed during the construction process, thereby significantly improving the jacking speed and construction efficiency.

[0016] 2. The sliding friction of the utility model is composed of a slide rail and a slide table, with a small friction coefficient and stable movement.

[0017] 3. The utility model is mainly used for the displacement of railway and highway bridges or similar beam-type heavy objects, and for low-height and short-distance forward propulsion along the bridge, transverse deviation correction and vertical jacking precise positioning. The jacking load is large, the displacement control accuracy is high, the operation is simple, and the degree of automation is high.

[0018] The device can provide higher precision control and adjustment to ensure the accuracy of structural installation, improve engineering quality and construction safety. The utility model will help to overcome the limitations of the prior art and promote the progress of bridge construction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a screw-type stepping jacking device;

[0020] Figure 2 It is a schematic diagram of the stepping system structure;

[0021] Figure 3 It is a schematic diagram of the lower structure of the correction system;

[0022] Figure 4 This is a schematic diagram of the upper structure of the correction system;

[0023] Figure 5 This is a schematic diagram of the jacking system structure.

[0024] In the figure: 1-stepping system, 2-correcting system, 3-lifting system, 101-stepping platform, 102-stepping guide rail, 103-stepping slide, 104-stepping motor, 105-stepping screw, 106-stepping nut, 201-correcting platform, 202-correcting guide rail, 203-correcting slide, 204-correcting motor, 205-correcting screw, 206-correcting nut, 301-lifting platform, 302-lifting cylinder. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the utility model;

[0026] like Figure 1-5As shown, a screw-type stepping jacking device includes a stepping system 1, a correction system 2 and a lifting system 3. The correction system 2 is fixedly connected to the stepping slide 203 through a correction platform 201 and arranged above the stepping system 1. While guiding the beam body along the bridge direction, it can also effectively correct the cross-bridge direction. The lifting system 3 is fixedly connected to the correction slide 203 through a lifting platform 301 and installed on the upper part of the correction system 2. The height adjustment is mainly completed by the lifting cylinder 302 inside it. The actuator of the screw-type stepping jacking device is mainly a stepping system 1, which is fixedly connected to the upper end surface of the pier or temporary pier through the lower end surface of the stepping pedestal 101. A stepping motor 104, a stepping screw 105 and a stepping nut 106 are arranged in the stepping pedestal 101. The stepping motor 104 drives the stepping screw 105 to rotate, and through cooperation with the stepping nut 106, the rotational motion is converted into linear motion, thereby driving the stepping stepping slide 103 to move along the stepping guide rail 102, carrying and pushing the steel box girder to move along the bridge direction.

[0027] The stepping platform 101 serves as the supporting structure of the stepping system 1 and provides a stable installation foundation for the entire system. A stepping guide rail 102 is arranged above the stepping platform 101 to guide the motion trajectory of the stepping slide 103 to ensure the linearity and stability of the motion. The stepping slide 103 is driven by the stepping motor 104 to rotate the stepping screw 105, and the stepping nut 106 moves along the spiral groove of the stepping screw 105 to convert the rotational motion into linear motion. The stepping nut 106 is fixedly connected to the stepping slide 103, thereby pushing the steel box girder to move.

[0028] The sliding direction of the correction system 2 is perpendicular to the stepping system 1. A correction guide rail 202 and a correction base 203 are arranged in sequence above the correction base 201. The correction motor 204 is horizontally placed in the correction base 201. The output end of the correction motor 204 is connected to the correction screw 205 through a gear. The correction motor 204 drives the correction screw 205 to rotate. A correction nut 206 is threadedly connected to the side wall of the correction screw 205. The correction nut 206 is connected to the lower end surface of the correction slide 203. When it is found that the position of the pushed steel beam has shifted, the correction system 2 can be started to make up for the offset.

[0029] A jacking system is provided on the correction system. The bottom of the jacking platform 301 is fixedly connected to the correction slide 203 so that the correction system 2 and the jacking system 3 are slidably connected. A jacking cylinder 302 is provided on the jacking platform 301, and the telescopic direction of the jacking cylinder 302 is the vertical direction.

[0030] The screw-type step-by-step jacking device of the utility model realizes bridge jacking construction by the coordinated work of the stepping system 1, the deviation correction system 2 and the jacking system 3 according to the reciprocating cycles of jacking, translation, beam dropping and return. First, the screw-type step-by-step jacking device and the cushion beam are set on the pier. The cushion beam is usually installed on both sides or in front and behind the screw-type step-by-step jacking device. The load of the beam structure is transmitted to the pier through the cushion beam; first, the jacking system 3 is started, and the height is adjusted by the jacking cylinder 302 so that it gradually separates from the cushion beam, and the beam body is raised to the designed position. The bridge structure is initially supported by the cushion beam and then supported by the screw-type step-by-step jacking device; then the stepping system is started 1, and the stepping screw 105 is driven to rotate by the stepping motor 104, and the stepping nut 106 moves along the spiral line of the stepping screw 105. Move, push the stepping slide 103 to move along the stepping guide rail 102, and then drive the beam body to move along the direction of the bridge; the vertical lifting cylinder 302 shrinks synchronously, so that the bridge structure falls back to the pad beam synchronously, and changes from the support of the screw-type stepping jacking device to the temporary pad beam support; then control the stepping motor 104 to rotate in the opposite direction, drive the stepping nut 106 to move in the opposite direction along the stepping screw 105, and push the stepping slide 103 to move in the opposite direction along the stepping guide rail 102 until the stepping slide returns to the starting position, and then circulates to the next station to continue the jacking construction.

[0031] The above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; obviously, the described embodiments are part of the embodiments of the utility model, but not all of them. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

[0032] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A screw-type stepping push device, characterized in that: Including stepping system, deviation correction system and lifting system; The deflection correction system is arranged above the stepping system, and the lifting system is installed on the upper part of the deflection correction system through the deflection correction slide. The stepping slide is pushed by the stepping system, thereby driving the beam body to move; The stepping system is composed of a stepping platform, a stepping lead screw, a stepping nut, a stepping motor, a stepping guide rail and a stepping slide; The top of the stepping platform is provided with a stepping guide rail and a stepping slide in sequence, and the stepping slide is arranged on the stepping guide rail, and the lower end surface of the stepping platform is fixedly connected to the upper end surface of the pier; The stepping platform is provided with a stepping screw, a stepping nut and a stepping motor. The stepping motor drives the stepping screw to rotate, and through cooperation with the stepping nut, the rotational motion is converted into a linear motion, thereby driving the stepping slide to move along the stepping guide rail, carrying and pushing the steel box girder to move along the bridge direction; The correction system comprises a correction platform, a correction screw, a correction nut, a correction motor, a correction guide rail and a correction slide; The top of the deflection correction seat is provided with a deflection correction guide rail and a deflection correction slide in sequence, and the deflection correction slide is arranged on the deflection correction guide rail, and the lower end surface of the deflection correction seat is fixedly connected to the upper end surface of the stepping slide; The deflection correction base is provided with a deflection correction screw, a deflection correction nut and a deflection correction motor. The deflection correction motor drives the deflection correction screw to rotate, and through cooperation with the deflection correction nut, the rotational motion is converted into linear motion, thereby driving the deflection correction slide to move along the deflection correction guide rail, adjusting the upward position of the steel box girder on the cross bridge, and ensuring the accuracy of the jacking process; The jacking system consists of a jacking pedestal and a jacking cylinder. The lower end surface of the jacking pedestal is fixedly connected to the upper end surface of the correction slide. The jacking cylinder is installed on the jacking pedestal and pushes the cylinder piston through hydraulic action to generate an upward thrust, thereby realizing the vertical lifting of the steel box girder.

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