Ballastless track base plate pre-embedding positioning tool

Abstract

A ballastless track base plate pre-embedded positioning tool comprises a cross beam support, a magnetic attraction support and a pre-embedded positioning structure, the cross beam support is connected with the pre-embedded positioning structure in a suspended mode through a positioning screw, the pre-embedded positioning structure is arranged in a base plate pouring space S, and the top face of the pre-embedded positioning structure is not higher than the top face of the pouring space S. The base plate pre-embedded positioning device is of an independent structure, can be compatible with a traditional track base plate pouring forming tool for use, and is simple in overall structure, convenient to disassemble and assemble due to the connection mode of magnetic attraction and bolts, high in practicability and convenient to popularize and use. And the use of the spherical hinge pressure plate in the positioning device enables the pre-embedded positioning device of the base plate to be simultaneously suitable for the same and different track routes of a linear section and a curved section. In addition, the arrangement position of the embedded positioning structure is adjusted to the top face of the base plate, and limiting and fixing of the buckling and pressing tool are conveniently achieved in a bolt fixed connection mode.

Description

Technical Field

[0001] The utility model relates to the technical field of CRTSIII type slab ballastless track construction, in particular to a ballastless track base plate pre-embedded positioning device. Background Art

[0002] The pouring of self-compacting concrete is a key step in the CRTSIII slab track laying operation. Reasonable clamping tooling limit method is the key to ensuring the quality of ballastless track construction and improving construction efficiency. Figure 1 As shown, during the pouring process of self-compacting concrete (the pouring area is Figure 1 ), the track plate 1 will have a slight floating deformation, and the elevation control of the track support platform 11 is difficult to directly meet the engineering requirements. The non-standard fasteners of the track support platform 11 need to be adjusted to meet the engineering acceptance requirements in the future, which will not only reduce the construction efficiency, but also increase the construction cost. During the concrete pouring process, the buckling tool 2 needs to be installed above the track plate 1 to apply the buckling force to offset the floating deformation of the track plate 1. The buckling tool 2 needs to set a horizontal limit groove on the side of the base plate 3 as the local force point of the buckling tool 2 during the self-compacting concrete pouring process. When the buckling force is applied, it is impossible to ensure that the track plate 1 is uniformly stressed. Excessive adjustment of the buckling force of the buckling tool 2 will cause local tensile damage in the horizontal limit groove of the base plate 3. In addition, the hinged form between the steel bar and the vertical pull rod in the horizontal limit groove is prone to stress concentration, which is not conducive to the overall stability of the buckling tool 2 structure. In order to improve the buckling effect of the track plate 1 and ensure the engineering quality of the base plate 3, it is necessary to develop a pre-embedded positioning device for the base plate 3 with better control effect.

[0003] Through searching, patent documents on construction tools for ballastless track base plates have been disclosed in the prior art. For example, the utility model patent with the publication number "CN207314062U" and the name "A complete set of tools for the construction of CRTSⅢ type slab-type ballastless track base plates" is disclosed. A complete set of tools for the construction of CRTSⅢ type slab-type ballastless track base plates is disclosed. The core of this technical solution is to optimize and improve the template complete set of tools in the construction of the base plate, which can accurately control the slope of the drainage slope on both sides of the base plate and the flatness of the top surface. However, there is no obvious difference in the layout position and form of the embedded sleeve of the base plate in the existing technical solution, and the specific embedded sleeve design scheme has not been disclosed. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a pre-embedded positioning tool for a ballastless track base plate, comprising a crossbeam bracket, a magnetic support and a pre-embedded positioning structure. The magnetic support is adsorbed on the inner side of the casting template, the crossbeam bracket is placed on the magnetic support, and the pre-embedded positioning structure is suspended and connected to the crossbeam bracket through a screw rod. The pre-embedded positioning structure is placed in the casting space S of the base plate, and the top surface of the pre-embedded positioning structure is not higher than the top surface of the casting space S.

[0005] Furthermore, pre-embedded positioning structure through holes are opened at both ends of the beam bracket, and the positioning screw is connected through the pre-embedded positioning structure through hole of the positioning beam to the specified position through the ranging sleeve. The pre-embedded positioning structure is placed at a specified elevation within the concrete pouring space S of the base plate by adjusting the positioning screw.

[0006] Furthermore, the middle of the cross beam support is a thick-walled hollow square structure, and the two ends are partially solid structures. Nut sleeves are provided at both ends of the cross beam support.

[0007] Furthermore, it also includes a ball-jointed pressure plate, which is connected to the two ends of the beam bracket through threads and nut sleeves.

[0008] Alternatively, the embedded positioning structure is an embedded screw, the beam bracket is suspended and connected via the embedded screw, and the embedded screw is fixed to the beam bracket via a distance measuring sleeve.

[0009] Furthermore, the crossbeam supports have five groups, and each group is connected to two pre-embedded positioning structures.

[0010] Compared with the prior art, the technical solution of the present application has the following beneficial effects: the base plate embedded positioning device involved in the utility model is an independent structure, which can be used in a compatible manner with the traditional rail base plate casting and molding tooling. Since the spatial positions of the embedded positioning structure and the beam bracket relative to the base plate have been determined, the three-dimensional spatial positioning and installation and fixation of the base plate embedded positioning structure can be achieved by accurately adjusting and positioning the spatial position of the beam bracket. After the base plate is cast and formed, the embedded positioning structure can provide a fixed load-bearing point for the installation of the subsequent limit buckling tooling. The overall structure of the base plate embedded positioning device is simple, and the connection form of magnetic attraction and bolts is convenient for the disassembly and assembly of the device. In addition, the use of the ball joint pressure plate in the positioning device and the adjustability of the beam bracket length make the base plate embedded positioning device suitable for the same type of different track routes in straight sections and curved sections. In addition, the layout position of the embedded positioning structure is adjusted to the top surface of the base plate, which is convenient for the limit fixation of the buckling tooling in the form of bolt fixed connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 : Schematic diagram of track slab pouring construction;

[0012] Figure 2 : Top view of the structural diagram of the positioning tooling;

[0013] Figure 3 : A cross-sectional view of the positioning tool in the first embodiment;

[0014] Figure 4 : Cross-sectional view of the positioning tooling in Example 2. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 2~Figure 4 As shown, a pre-embedded positioning device for a ballastless track base plate includes a crossbeam bracket 7, a magnetic support 6 and a pre-embedded positioning structure 8, wherein the crossbeam bracket 7 is suspended and connected to the pre-embedded positioning structure 8 by a positioning screw 81, the magnetic support 6 is adsorbed on the inner side of the casting template 4, the crossbeam bracket 7 is placed on the magnetic support 6, and the pre-embedded positioning structure 8 is placed in the casting space S of the base plate, and the top surface of the pre-embedded positioning structure is not higher than the top surface of the casting space S. Since the spatial positions of the pre-embedded positioning structure 8 and the crossbeam bracket 7 relative to the base plate 3 have been determined, this embodiment can achieve three-dimensional spatial positioning and fixed installation of the pre-embedded positioning structure 8 of the base plate by accurately adjusting and positioning the spatial position of the crossbeam bracket 7. Since the spatial position between the pre-embedded positioning structure 8 and the crossbeam bracket 7 is determined and fixed, the position of the pre-embedded positioning structure 8 during the casting process of the base plate is also uniquely determined. In order to facilitate the subsequent installation of the limit buckling tool 2, the top surface of the pre-embedded positioning structure 8 should not exceed the top surface of the base plate 3.

[0017] Example 1 Figure 3 As shown: the embedded positioning structure of the embedded positioning structure 8 is an embedded sleeve 83, and the crossbeam bracket 7 is vertically connected to the positioning screw 81. The embedded sleeve 83 and the positioning screw 81 are interlocked and penetrate into the concrete pouring space S of the base plate, and the top surface of the pouring space is slightly higher than the top surface of the embedded sleeve 83. The spatial position of the embedded sleeve 83 is determined by the distance measuring sleeve 82 on the positioning screw 81. After the concrete pouring is completed, the embedded sleeve 83 is retained in the base plate 3, and the positioning screw 81 can be reversed and disassembled. The larger size of the bottom surface of the embedded sleeve 83 is to increase the contact area between the concrete and the bottom surface of the embedded sleeve 83, optimize the force performance of the adjacent area of ​​the embedded hole, and also avoid the occurrence of unfavorable situations such as the embedded sleeve 83 being separated from the base plate 3 due to excessive pulling force.

[0018] In this embodiment, the two ends of the beam bracket 7 are connected to the ball joint pressure plate 5 through bolts and the nut sleeves at the ends of the beam bracket 7. The angle adjustment function of the ball joint pressure plate 5 makes the embedded positioning device of the base plate 3 suitable for both the straight and curved sections of the track. The straight section casting template 4 is perpendicular to the beam bracket 7, and the curved section casting template 4 is not perpendicular to the beam bracket 7. The deflection angle of the ball joint pressure plate 5 is adaptive to the lateral inclination of the base plate 3. The specific use process is to first determine the fixed elevation of the beam bracket 7 by laying out the line, and adjust the length of the entire beam bracket 7 by changing the spacing between the ball joint pressure plates 5 at both ends of the beam bracket 7 through the threaded fit of the ball joint pressure plate 5. The beam bracket 7 is placed in the casting template 4, and the ball joint pressure plate 5 is continuously rotated so that it is in close contact with the inner side wall of the casting template 4 at the aforementioned elevation position. After the position of the beam bracket 7 is determined by the ball joint pressure plate 5, the magnetic support 6 is placed below the ball joint pressure plate 5 and adsorbed on the inner side wall of the casting template 4, which further supports the beam bracket 7 and prevents it from loosening and falling.

[0019] In this embodiment, the distance measuring sleeve 82 is provided with millimeter-level scales, the positioning screw 81 is provided with a positioning line, and a non-through partial opening is provided in the middle of the distance measuring sleeve 82 to facilitate observation of the elevation of the positioning screw, thereby determining the precise position of the embedded device.

[0020] Example 2 Figure 4 As shown: the embedded positioning structure of the embedded positioning structure 8 is an embedded screw 84, which is vertically connected to the crossbeam bracket 7 and penetrates the crossbeam bracket 7. One end of the embedded screw 84 that penetrates the crossbeam bracket 7 is locked with a distance measuring sleeve 82. The embedded screw 84 can also be used as an embedded positioning structure to provide a fixed force point for the limit buckling fixture, but it has certain defects compared with the above-mentioned implementation method. The connection form of the embedded screw 84 determines that it is bound to be higher than the top surface of the base plate casting space S. After the concrete is poured, the base plate 3 will not be a flat surface. After the subsequent track plate 1 is poured, the limit fixture 2 is removed, and the embedded screw 84 that exceeds the top surface of the base plate 3 needs to be cut, which increases the workload of on-site construction.

[0021] The fixing method between the positioning screw 81 and the beam bracket 7 is a detachable fixing method. Specifically, the positioning screw 81 passes through the through hole opened in the beam bracket 7 and is fixed to the distance measuring sleeve 82. The positioning screw 81 and the distance measuring sleeve 82 cooperate to pass through the beam bracket 7 and are fixed.

[0022] In order to meet the positioning and fixing requirements of the buckling and limiting tooling, the beam bracket 7 has five groups corresponding to the required buckling and limiting tooling, and two embedded positioning structures 8 are connected to each group.

[0023] The pre-embedded positioning tooling of the base plate can be disassembled as an independent component, and the bolt and magnetic connection method improves the disassembly efficiency of the device. It can be installed when needed, which greatly improves the applicability and feasibility of application and promotion of the utility model patent.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ballastless track base plate pre-embedded positioning tool, characterized in that: The invention comprises a crossbeam support (7), a magnetic support (6) and a pre-embedded positioning structure (8), wherein the magnetic support (6) is adsorbed on the inner side of a casting template (4), the crossbeam support (7) is placed on the magnetic support (6), the pre-embedded positioning structure (8) is suspended on the crossbeam support (7) via a positioning screw (81), the pre-embedded positioning structure (8) is placed in a casting space S of a base plate, and the top surface of the pre-embedded positioning structure (8) is not higher than the top surface of the casting space S.

2. The ballastless track base plate pre-embedded positioning tool as claimed in claim 1, characterized in that: The embedded positioning structure (8) is an embedded sleeve (83), the crossbeam support (7) is suspended and connected to the embedded sleeve (83) via a positioning screw (81), the embedded sleeve (83) is placed in the casting space S of the base plate, and the top surface of the embedded sleeve (83) is not higher than the top surface of the casting space S.

3. The ballastless track base plate pre-embedded positioning tool as claimed in claim 2, characterized in that: Pre-embedded positioning structure through holes are provided at both ends of the cross beam support (7), and the positioning screw (81) is connected and connected through the pre-embedded positioning structure through hole of the cross beam support (7) to a specified position via a distance measuring sleeve (82), and the pre-embedded positioning structure (8) is placed at a specified elevation in the concrete pouring space S of the base plate by adjusting the positioning screw (81).

4. The ballastless track base plate pre-embedded positioning tool as claimed in claim 3, characterized in that: The cross beam support (7) has a thick-walled square structure with a central hole in the middle, and has two ends that are partially solid structures. Nut sleeves are provided at both ends of the cross beam support (7).

5. The pre-embedded positioning tool for the ballastless track base plate according to claim 4, characterized in that: It also includes a ball hinge pressure plate (5), which is connected to the two ends of the crossbeam bracket (7) through the cooperation of threads and nut sleeves.

6. The pre-embedded positioning tool for the ballastless track base plate according to claim 1, characterized in that: The embedded positioning structure (8) is an embedded screw (84), and the crossbeam support (7) is suspended and connected via the embedded screw. The embedded screw (84) is fixed to the crossbeam support (7) via a distance measuring sleeve (82).

7. The ballastless track base plate pre-embedded positioning tool as claimed in any one of claims 1 to 6, characterized in that: The crossbeam supports (7) have five groups, and each group is connected to two pre-buried positioning structures (8).

Images