Slideway device for continuous beam pushing

Abstract

The utility model discloses a slideway device for continuous beam pushing, and relates to the technical field of bridge pushing construction. Comprising a stainless steel plate slide way embedded in the bottom of a box girder body, and the inner wall of the stainless steel plate slide way makes contact with a polytetrafluoroethylene sliding block; the bearing steel plate box body structure is used for bearing the polytetrafluoroethylene slide block; the cavity carriers are embedded in the two sides of the polytetrafluoroethylene sliding block; the pressure sensors are arranged in the corresponding cavity carriers and are connected with the microprocessor; the first electromagnets are respectively arranged on two sides of the bottom of the stainless steel plate slideway; the second electromagnets are arranged on the two sides of the top of the bearing steel plate box body structure respectively, and the first electromagnet or the second electromagnet on the same side is connected with the microprocessor. By arranging the electromagnet and adjusting the current of the electromagnet, the strength of electromagnetic force can be controlled, so that the stainless steel plate is lifted, the friction force between the stainless steel plate slideway and the polytetrafluoroethylene sliding block is reduced, and the abrasion of the sliding block is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge pushing construction technical field, concretely relates to a slide device for continuous beam pushing. BACKGROUND

[0002] With the wide application of bridge pushing method in bridge construction, the forward movement of pushing structure in the construction process must overcome the frictional resistance generated when advancing. The existing patent CN102071642B discloses an improved method of slide for steel truss girder pushing construction: the upper slide is composed of stainless steel plates butt-jointed at the head and tail, and the lower slide is fixed with main body steel plates and polytetrafluoroethylene sliding plates on the supporting pier in turn. The device is designed for the upper and lower slides of the beam body bottom surface and the supporting pier top surface, has the advantages of suitable length, smooth surface, large rigidity, simple structure, convenient disassembly, and firm connection with the pushing structure and the supporting pier.

[0003] However, due to the small contact area of the main longitudinal beam bottom surface of the steel truss girder and the supporting pier slide, the polytetrafluoroethylene sliding plate is easy to deviate from the track during pushing, and it is difficult to control and adjust the moving direction. Although the smooth surface of the polytetrafluoroethylene sliding plate can reduce the frictional resistance with the stainless steel plate, it is easy to wear, which affects the sliding effect, resulting in low construction efficiency and unable to ensure rapid and continuous pushing construction. In order to improve the construction efficiency, reduce the frictional resistance and avoid the slide from derailing, a more convenient, safe and efficient pushing slide device needs to be used. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a slide device for continuous beam pushing, which can reduce the friction between the stainless steel plate slide and the polytetrafluoroethylene sliding block, reduce the wear of the sliding block, realize the effect of continuous pushing, and ensure the construction efficiency.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a slide device for continuous beam pushing, comprising:

[0006] A stainless steel plate slide is pre-buried at the bottom of the box girder beam body, and the inner wall of the stainless steel plate slide is in contact with the polytetrafluoroethylene sliding block;

[0007] A load-bearing steel plate box structure is used to bear the polytetrafluoroethylene sliding block;

[0008] A cavity carrier is embedded on both sides of the polytetrafluoroethylene sliding block;

[0009] A pressure sensor is installed in the corresponding cavity carrier and connected to the microprocessor;

[0010] A first electromagnet is arranged on both sides of the bottom of the stainless steel plate slide;

[0011] Second electromagnet, respectively, set in the bearing steel plate box structure top two sides, the same side first electromagnet or second electromagnet is connected with microprocessor.

[0012] As a preferred scheme of the utility model, the same side first electromagnet, second electromagnet are oppositely arranged and same magnetic pole.

[0013] As a preferred scheme of the utility model, the top surface and both side surfaces of the polytetrafluoroethylene sliding block are smooth surfaces, which are in contact with the inner walls of the stainless steel plate slide.

[0014] As a preferred scheme of the utility model, the stainless steel plate slide is provided with a sliding groove on both sides, and the bearing steel plate box structure top is arranged in the sliding groove.

[0015] As a preferred scheme of the utility model, the bearing steel plate box structure is provided with a sliding block baffle at both ends, which is used for limiting the polytetrafluoroethylene sliding block.

[0016] As a preferred scheme of the utility model, the pressure sensors on both sides are symmetrically arranged, and the microprocessor controls the first electromagnet or the second electromagnet on the corresponding side through the collected pressure.

[0017] As a preferred scheme of the utility model, the outer wall of the cavity carrier is tightly bonded with the polytetrafluoroethylene sliding block, and the gas pressure in the cavity carrier changes when the stainless steel plate slide moves.

[0018] As a preferred scheme of the utility model, the bearing steel plate box structure is connected with a front baffle and a rear baffle at the bottom end respectively, the front baffle and the rear baffle are in contact with the support cushion stone, and the bearing steel plate box structure is fixed on the support cushion stone through temporary anchor bolts.

[0019] As a preferred scheme of the utility model, the cavity carrier is made of polyester material with resilience and air-tightness, and the cavity carrier can quickly return to the initial state after being compressed.

[0020] As a preferred scheme of the utility model, the stainless steel plate slide is embedded in the bottom of the box girder beam body through shear nails.

[0021] The utility model discloses a bearing steel plate box structure, which comprises a bearing steel plate box structure, a first electromagnet and a second electromagnet, and a microprocessor. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0023] Figure 1 Front view of slide device for continuous beam pushing;

[0024] Figure 2 Sectional view of force bearing steel plate box structure;

[0025] Figure 3 Side view of slide device for continuous beam pushing;

[0026] Figure 4 Sectional view of slide device for continuous beam pushing;

[0027] Figure 5 Telecommunication signal connection schematic diagram involved in the present application.

[0028] Sequence number explanation in the figure: 1-sliding block baffle, 2-cavity carrier, 3-pressure sensor, 4-stainless steel plate slide, 5-first electromagnet, 6-polytetrafluoroethylene sliding block, 7-force bearing steel plate box structure, 8-front baffle, 9-rear baffle, 10-microprocessor, 11-box girder body, 12-supporting cushion stone, 13-temporary anchor bolt, 14-supporting pier. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] In addition, the terms "first", "second" are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited. The meaning of "several" is one or more than one, unless otherwise specifically limited.

[0032] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Embodiment 1

[0035] Please refer to Figures 1-4 , the embodiment provides a sliding device for continuous beam pushing, comprising a sliding block baffle 1, a cavity carrier 2, a pressure sensor 3, a stainless steel plate sliding way 4, a first electromagnet 5, a second electromagnet, a polytetrafluoroethylene sliding block 6, a bearing steel plate box structure 7; the top surface and the two side surfaces of the polytetrafluoroethylene sliding block are smooth surfaces, which are in contact with the inner walls of the stainless steel plate sliding way, and the stainless steel plate sliding way is pre-buried in the bottom of the box girder body through shear nails; the polytetrafluoroethylene sliding block is placed on the bearing steel plate box structure and is limited by the sliding block baffles at both ends of the bearing steel plate box structure; a cavity carrier is embedded on both sides of the polytetrafluoroethylene sliding block, and a pressure sensor is arranged in each cavity carrier; the pressure sensor 3 collects the interaction force between the stainless steel plate sliding way 4 and the polytetrafluoroethylene sliding block 6, converts the signal into an electric signal through a signal conversion circuit and a filter amplification circuit, and transmits the electric signal to a microprocessor 10, and the microprocessor 10 controls the current of the first electromagnet 5 or the second electromagnet, as shown in Figure 5 ; a first electromagnet is arranged on each side of the bottom of the stainless steel plate sliding way, a second electromagnet is arranged on each side of the top of the bearing steel plate box structure, and the first electromagnet and the second electromagnet on the same side are oppositely arranged and have the same magnetic pole;

[0036] In the embodiment, the stainless steel plate slide way is provided with a sliding groove on both sides, the top of the bearing steel plate box structure is placed in the sliding groove, the pushing sliding direction is maintained and the fixed position of the polytetrafluoroethylene sliding block is maintained, and the pushing efficiency is ensured. The traditional slide way is prone to derailment, and the position of the slide way and the polytetrafluoroethylene sliding block must be checked frequently. If deformation and sliding are found, the jacking must be stopped immediately, and the slide way needs to be adjusted again, which will delay the construction progress. The bearing steel plate box structure is preferably welded by Q345D steel plate.

[0037] In the embodiment, the bottom end of the bearing steel plate box structure 7 is respectively provided with a front baffle 8 and a rear baffle 9, the front baffle and the rear baffle are in contact with the support cushion stone, the bearing steel plate box structure 7 is fixedly connected with the support cushion stone 12 through a plurality of temporary anchor bolts 13 to prevent sliding in the jacking direction, and the support cushion stone 12 is placed on a support pier 14.

[0038] Embodiment 2

[0039] The embodiment provides a method for using a slide way device for continuous beam jacking, comprising the following steps:

[0040] When the box girder body is not jacked or is not jacked to the middle of the support pier, the stainless steel plate slide way is not in contact with the polytetrafluoroethylene sliding block, and the pressure sensor does not sense pressure change;

[0041] When the box girder body is jacked to the stainless steel plate slide way and is just attached to the top surface of the cavity carrier, the gas in the cavity carrier is preliminarily extruded, the pressure sensors on both sides sense pressure change, the interaction force collected at this time is set as a preset value F0, and when the microprocessor receives an electrical signal with the preset value F0, the first electromagnet or the second electromagnet starts to generate magnetism.

[0042] The box girder body continuously advances, the contact area between the stainless steel plate slide way and the polytetrafluoroethylene sliding block slowly increases to the maximum in the process, the pressure F sensed by the pressure sensors on both sides gradually increases and then tends to be stable, the size of the electrical signal received by the microprocessor 10 is affected, and the first electromagnet 5 or the second electromagnet on both sides is controlled by the size of the current to generate the required magnetism, so that the jacking force that can jack up the stainless steel plate slide way is generated. Specifically, when the pressure F is greater than the preset value F0, the current flowing through the first electromagnet or the second electromagnet is increased, so that the electromagnetic force generated is increased to jack up the stainless steel plate slide way and reduce the friction between the stainless steel plate slide way and the polytetrafluoroethylene sliding block. During the jacking process, when the pressure F is less than the preset value F0, the current flowing through the first electromagnet or the second electromagnet is reduced, so that stable jacking is realized.

[0043] In the embodiment, the box girder body has a beam body width of 5 m and a height of 1.5 m, and Q234q steel is used. The slide way has a length of 6 m and a width of 4 m. The pressure F received by the microprocessor is 312.57 kN, the surface area S1 of the pressure sensor 3 is 0.1 m2 The contact area S2 between the pressure sensor 3 and the stainless steel plate 4 is 0.3m 2 The pressure of the stainless steel plate slide 4 According to Maxwell electromagnetic theory, the current n is the number of turns of the electromagnet coil, which is 50000, μ0 is the magnetic permeability, which is 4π×10 -7 N / A 2 S0 is the air gap area, which is 2×10 -3 m 2 σ0 is the air gap thickness, which can be 1.5×10 -3 m When the electromagnetic force is equal to 937.71kN, i.e. the current I=0.16A, the electromagnetic force generated is equal to the pressure, the first electromagnet 5 generates magnetism to lift the stainless steel plate slide 4, reduce the contact area between the stainless steel plate slide 4 and the polytetrafluoroethylene slide block 6, and reduce the abrasion, so as to achieve the purpose of reducing the slide friction, prolong the service life, and ensure the construction efficiency; when the pressure signal sensed by the pressure sensor 3 is the same as the initial state, the microprocessor makes the first electromagnet 5 or the second electromagnet be powered off.

[0044] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; 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 present application.

Claims

1. A launching device for the launching of a continuous beam, characterized in that, The utility model relates to a box girder sliding device, comprising: a stainless steel plate slide embedded in the bottom of the box girder beam body, with the inner wall of the stainless steel plate slide in contact with the polytetrafluoroethylene slider; a load-bearing steel plate box structure for bearing the polytetrafluoroethylene slider; a cavity carrier embedded on both sides of the polytetrafluoroethylene slider; a pressure sensor installed in the corresponding cavity carrier and connected to the microprocessor; a first electromagnet arranged on both sides of the bottom of the stainless steel plate slide; a second electromagnet arranged on both sides of the top of the load-bearing steel plate box structure, with the first electromagnet or the second electromagnet on the same side connected to the microprocessor.

2. The launching ramp device for continuous beam launching according to claim 1, wherein, The first electromagnet and the second electromagnet on the same side are oppositely arranged and have the same magnetic pole.

3. The launching ramp device for continuous beam launching according to claim 1, wherein The top surface and the two side surfaces of the polytetrafluoroethylene slider are smooth surfaces, which are in contact with the inner wall of the stainless steel plate slide.

4. The launching ramp device for continuous beam launching according to claim 1, wherein The stainless steel plate slide is provided with a sliding groove on both sides, and the load-bearing steel plate box structure is placed in the sliding groove.

5. The launching ramp device for continuous beam launching according to claim 1, wherein The load-bearing steel plate box structure is provided with a slider baffle at both ends for limiting the polytetrafluoroethylene slider.

6. The launching ramp device for continuous beam launching according to claim 1, wherein The pressure sensors on both sides are symmetrically arranged, and the microprocessor controls the first electromagnet or the second electromagnet on the corresponding side through the collected pressure.

7. The launching ramp device for continuous beam launching according to claim 1, wherein The outer wall of the cavity carrier is tightly bonded to the polytetrafluoroethylene slider, and the gas pressure in the cavity carrier changes when the stainless steel plate slide moves.

8. The launching ramp device for continuous beam launching according to claim 1, wherein The load-bearing steel plate box structure is connected with a front baffle and a rear baffle at the bottom end, and the front baffle and the rear baffle are in contact with the support cushion stone, and the load-bearing steel plate box structure is fixed on the support cushion stone through temporary anchor bolts.

9. The launching ramp device for continuous beam launching according to claim 1, wherein The cavity carrier is made of polyester material with resilience and no air leakage.

10. The launching ramp device for continuous beam launching according to claim 1, wherein, The stainless steel plate slide is embedded in the bottom of the box girder beam body through shear nails.

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