Turnout sleeper electric service equipment installation pre-burying structure

Abstract

This utility model discloses a pre-embedded structure for installing electrical equipment on a turnout sleeper, belonging to the technical field of turnout equipment. It includes a connecting plate and at least three nut assemblies. The nut assemblies are used to mate with the mounting bolts of the turnout sleeper electrical equipment. The connecting plate is used to connect and fix the nut assemblies. The axis of each nut assembly is perpendicular to the connecting plate, and the nut assemblies are distributed along the contour of the connecting plate so that the connecting lines between adjacent nut assemblies form a polygon. The polygonal arrangement of the multiple nut assemblies formed by the connecting plate in this application enables the uniform distribution of force on each nut, avoiding the problem of localized stress concentration in the concrete caused by independent force on a single nut. This effectively reduces the risk of cracking and damage to the concrete around the nuts, and improves the durability and service life of the overall turnout sleeper structure.

Description

Technical Field

[0001] This utility model relates to the field of turnout equipment technology, specifically to the pre-embedded structure for the installation of turnout sleeper electrical equipment. Background Technology

[0002] To ensure the safe and stable operation of the turnout system, dedicated concrete sleepers must be laid in the turnout area. As a crucial foundational component of the track system in the turnout section, the sleeper primarily serves to support the track structure, transmit train loads, and maintain track gauge and directional stability. Especially in ballastless track systems, the sleeper not only needs to meet the basic load-bearing requirements of the track structure but also needs to serve as the installation foundation for ancillary facilities such as electrical and signaling equipment. Therefore, the structural performance and construction techniques of the sleeper directly affect the installation accuracy and subsequent operational reliability of the turnout.

[0003] Existing concrete turnout sleepers are generally cast monolithically from reinforced concrete. To meet the installation requirements of electrical equipment, turnout switching equipment, signaling equipment, and other facilities, auxiliary installation structures such as nuts, steel pipes, and base plates are pre-embedded inside the sleepers. These structures are mainly exposed on the surface of the sleepers through electrical control holes or mounting holes, facilitating the subsequent fastening of electrical equipment to the sleepers with bolts, achieving precise positioning and stable fixation of the equipment. The electrical control holes and their pre-embedded structural components are typically in the form of nut assemblies or steel pipe assemblies, pre-embedded and fixed using molds during the sleeper production stage, forming an integral part of the sleeper during concrete pouring. A well-designed pre-embedded structure not only needs to meet the space requirements for subsequent bolt installation of electrical equipment but also needs to ensure the installation accuracy and connection strength of the bolts and nuts to prevent damage or loosening of the equipment installation structure due to dynamic loads caused by train operation, thereby affecting the normal operation of the turnout.

[0004] Existing concrete turnout sleepers typically have multiple electrical control holes at both ends for installing electrical equipment. These holes are connected to the turnout's electrical equipment via pre-embedded nuts. Patent application number CN201320501888 discloses a pre-embedded bolt positioning device for a non-prestressed turnout sleeper, comprising a base plate with bolt mounting holes on both sides. Pre-embedded bolts are inserted into these holes, and a support tube is fitted under the pre-embedded bolts via nuts and washers.

[0005] In the above-mentioned scheme, the use of power tools during on-site installation of the electrical control hole bolts makes precise torque control difficult. Since the embedded parts for the electrical control holes are made of metal, excessive torque may cause cracks around the electrical control holes on the turnout sleepers, posing a potential danger to the normal operation of the turnout. Utility Model Content

[0006] This utility model provides a pre-embedded structure for installing electrical equipment on turnout sleepers, in order to solve the technical problem that existing solutions are prone to causing cracks around the electrical bolt holes on the turnout sleepers when installing electrical bolts.

[0007] According to one aspect of the present invention, a pre-embedded structure for installing turnout sleeper electrical equipment is provided, including a connecting plate and at least three nut assemblies. The nut assemblies are used to cooperate with the mounting bolts of the turnout sleeper electrical equipment. The connecting plate is used to connect and fix the nut assemblies. The axis of the nut assemblies is perpendicular to the connecting plate. The nut assemblies are distributed along the contour of the connecting plate so that the connecting lines between adjacent nut assemblies form a polygon.

[0008] Optionally, the connecting plate is in the shape of an isosceles triangle, and three nut assemblies are respectively disposed at the three vertices of the connecting plate. Optionally, the connecting plate is provided with nut mounting holes, the top of the nut assembly is inserted into the nut mounting holes, and is fixedly connected to the connecting plate, so that the upper surface of the connecting plate and the upper surface of the nut are flush.

[0009] Optionally, the nut assembly includes a nut body and a connecting tube, with the nut body inserted into the connecting hole and the connecting tube located at the end of the nut body away from the connecting plate.

[0010] Optionally, a sealing element is provided at the end of the connecting tube away from the nut body to close the opening at that end of the connecting tube away from the nut body.

[0011] Optionally, the diameter of the connecting pipe is larger than the inner diameter of the nut body.

[0012] Optionally, the connecting plate has a hollowed-out center, forming a frame structure consisting of three connecting sides with the same width.

[0013] Optionally, the sealing element is a base plate.

[0014] Optionally, the sealing element is conical, with the tip of the cone facing away from the connecting plate.

[0015] Optionally, the connecting plate, nut body, connecting pipe and base plate are all made of carbon steel or alloy steel, and the nut assembly is fixedly connected to the connecting plate by full welding.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] This design employs a structural design including a connecting plate and at least three nut assemblies. The nut assemblies mate with the mounting bolts of the turnout sleeper electrical equipment, while the connecting plate connects and secures each nut assembly. The axes of the nut assemblies are perpendicular to the connecting plate and distributed along its contour, creating a polygonal layout between adjacent nut assemblies. This design significantly optimizes the structure and enhances functionality. Integrating multiple nut assemblies into a single structure via the connecting plate allows for overall positioning and fixation during turnout sleeper pouring, ensuring precise and consistent spatial relative positions of the nut assemblies. This avoids installation deviations caused by individual positioning, improves the fitting accuracy of the electrical equipment mounting bolts, and ensures efficient and convenient subsequent installation operations. Furthermore, the polygonal arrangement of the multiple nut assemblies via the connecting plate ensures even stress distribution among the nuts, preventing localized stress concentration in the concrete caused by individual nuts bearing excessive force. This effectively reduces the risk of cracking and damage to the concrete around the nuts, improving the overall durability and service life of the turnout sleeper structure.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the pre-embedded structure for the installation of the turnout sleeper electrical equipment of this utility model;

[0021] Figure 2 This is a cross-sectional view of the pre-embedded structure for the installation of the turnout sleeper electrical equipment of this utility model.

[0022] Legend:

[0023] 1. Connecting plate; 2. Nut body; 3. Connecting pipe; 4. Sealing component; 5. Fork sleeper. Detailed Implementation

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0026] This application discloses a pre-embedded structure for installing turnout sleeper electrical equipment.

[0027] Reference Figure 1The pre-embedded structure for the turnout sleeper electrical equipment installation includes a connecting plate 1 and at least three nut assemblies. The nut assemblies mate with the mounting bolts of the turnout sleeper electrical equipment. The connecting plate 1 connects and fixes the nut assemblies. The axis of the nut assemblies is perpendicular to the connecting plate 1, and the nut assemblies are distributed along the contour of the connecting plate 1, forming a polygonal connection between adjacent nut assemblies. By fixing at least three nut assemblies together with the connecting plate 1 and forming a polygonal structure along the contour of the connecting plate 1, overall positioning can be achieved during the pre-embedding process of the turnout sleeper 5, ensuring accurate positioning of the nut assemblies and standard hole spacing, thus improving the fitting accuracy of the electrical equipment installation. This structure, with the connecting plate 1 bearing the overall force, effectively disperses the stress caused by bolt tightening or train operation, reducing the risk of localized stress concentration in the concrete around the nuts and preventing cracking of the turnout sleeper 5 due to excessive stress. Simultaneously, the polygonal arrangement improves the stability and overall rigidity of the pre-embedded structure, enhances the pull-out and torsional resistance of the nut assemblies, and makes the connection of the turnout sleeper electrical equipment more robust and reliable, meeting the high-requirement requirements of conditions such as ballastless track.

[0028] The structural form of the connecting plate 1 can be configured as polygonal, circular, honeycomb, or reinforced frame, depending on different mechanical requirements and application scenarios. Polygonal structures are suitable for arranging multiple nut assemblies and achieving multi-point uniform force distribution. Circular structures offer good symmetry and uniformity. Honeycomb structures can reduce overall weight while improving structural strength and compressive resistance. Reinforced frame structures further enhance the rigidity, bending, and shear resistance of the connecting plate 1 through the addition of reinforcing ribs. In this embodiment, the connecting plate 1 is preferably an isosceles triangular structure, which is the optimal choice after comprehensively considering processing technology, mechanical properties, installation space, and material utilization. The isosceles triangular structure possesses good geometric stability, and its three-point layout forms a stable spatial force-bearing system, ensuring the precise relative positions of the three nut assemblies during pre-embedding and pouring, avoiding nut hole offset due to construction errors, thereby improving the fitting accuracy of electrical equipment installation.

[0029] In this embodiment, three nut assemblies are respectively set at the three vertices of the connecting plate 1, which ensures a stable and balanced geometric arrangement among the nut assemblies. This allows for precise positioning during the pre-embedding process of the turnout sleeper 5, effectively guaranteeing the spatial accuracy of the bolt mounting holes, thereby improving the installation accuracy and reliability of the electrical equipment. Simultaneously, this three-point distribution method, through the connecting plate 1, fixes each nut assembly as a whole, forming a reasonable mechanical transmission path under stress. This evenly distributes the tensile and torque forces generated by bolt tightening or train operation, reducing the risk of localized stress concentration in the concrete surrounding a single nut, preventing cracking or damage to the turnout sleeper 5 structure, further enhancing the overall rigidity and pull-out resistance of the pre-embedded structure, and improving the durability and service life of the turnout sleeper 5.

[0030] Reference Figure 2The connecting plate 1 is provided with nut mounting holes. The top of the nut assembly is inserted into the nut mounting holes and fixedly connected to the connecting plate 1, making the upper surface of the connecting plate 1 and the upper surface of the nut flush. This design ensures that the nut assembly is positioned more accurately and firmly on the connecting plate 1, effectively preventing inaccurate mounting hole positions due to displacement or angular deviation of the nut during concrete pouring, and ensuring the alignment and assembly accuracy of the bolts during subsequent installation of the electrical equipment. At the same time, the upper surface of the nut is flush with the surface of the connecting plate 1, so that it can be consistent with the surface of the turnout sleeper 5 after casting, avoiding the impact of nut protrusion or depression on the normal installation and stress state of the electrical equipment.

[0031] The connecting plate 1 has a hollow center, forming a frame structure with three equally wide connecting edges. This effectively reduces the weight of the connecting plate 1 while maintaining structural strength and rigidity, thus reducing material usage and improving economy. Simultaneously, the hollow structure allows concrete to more fully enclose and fill the area around the connecting plate 1 during pouring, enhancing the bond between the connecting plate 1 and the concrete, and improving the overall stability and pull-out resistance of the embedded parts. The frame structure, with its three equally wide connecting edges, creates a mechanical balance, helping the nut assembly achieve uniform stress distribution under external forces, reducing localized stress concentration, and lowering the risk of cracking in the forklift sleeper 5.

[0032] The nut assembly includes a nut body 2 and a connecting tube 3. The nut body 2 is inserted into the connecting hole, and the connecting tube 3 is located at the end of the nut body 2 furthest from the connecting plate 1. The nut body 2, inserted into the mounting hole of the connecting plate 1, serves to engage with the mounting bolts for fastening. It is a key component for ensuring reliable connection of the electrical equipment, guaranteeing sufficient thread engagement strength and positioning accuracy during bolt tightening. The connecting tube 3, located at the end of the nut body 2 furthest from the connecting plate 1, primarily functions to create a channel for bolt installation during the pouring of the turnout sleeper 5, preventing concrete slurry from entering the nut and keeping the through hole unobstructed. It also guides the bolt installation direction, stabilizes the nut position, and further enhances the overall pull-out and torsional resistance of the embedded parts, ensuring the connection's firmness and long-term stability after the electrical equipment is installed.

[0033] Common methods for connecting and fixing the nut body 2 and the connecting plate 1 include full welding, spot welding, threaded connection, riveting, and snap-fit ​​connection, each with its own characteristics in terms of structural strength, manufacturing difficulty, and applicable scenarios. In this embodiment, full welding is preferred for fixing the nut body 2 and the connecting plate 1. The main reason is that full welding can achieve complete fusion of the welding area, forming a continuous and seamless connection interface, effectively improving the overall rigidity and structural strength between the nut body 2 and the connecting plate 1. This ensures that under the action of vibration and impact loads caused by the casting of the turnout sleeper 5, bolt tightening, and train operation, the structure will not fail due to local loosening or detachment. Full welding can also significantly improve the pull-out resistance and torsional resistance of the embedded structure, preventing the nut assembly from displacing or rotating due to uneven stress or fatigue damage, thereby ensuring the installation accuracy and long-term stability of the electrical equipment. Furthermore, compared to other connection methods, full welding is more controllable and consistent in mass production, which is beneficial to improving product quality stability and manufacturing efficiency. Therefore, in this embodiment, using full welding as the fixing method between the nut body 2 and the connecting plate 1 is the optimal choice after comprehensively considering structural strength, production process and performance.

[0034] To ensure the overall performance and service life of the pre-embedded structure for the turnout electrical equipment installation in this embodiment, CO2 gas shielded welding or submerged arc welding is used in the welding process to ensure continuous and full welds without slag inclusions, porosity, or other welding defects. Before welding, the connecting surfaces are cleaned and derusted to remove oil and oxide layers, improving the strength and stability of the welded joint. After welding, weld flaw detection is performed, such as ultrasonic testing or magnetic particle testing, to ensure the welding quality meets standards. The welding of the connecting pipe 3 to the nut body 2 and the welding of the sealing component 4 to the connecting pipe 3 also employs a full welding process to ensure a tight, sealed structure, preventing concrete slurry from seeping in during subsequent pouring. After welding, the entire pre-embedded assembly is dimensionally inspected to ensure that the axis of the nut assembly is perpendicular to the connecting plate 1, avoiding angular errors that could affect the verticality and stability of the equipment installation.

[0035] A sealing element 4 is installed at the end of the connecting pipe 3 furthest from the nut body 2. Its main function is to seal the lower opening of the connecting pipe 3 during the pouring of the turnout sleeper 5, preventing concrete slurry from entering the connecting pipe 3. This ensures the cleanliness and unobstructed flow of the bolt installation holes, preventing bolt installation difficulties due to concrete blockage. Furthermore, the sealing element 4 structurally enhances the sealing and rigidity of the end of the connecting pipe 3, providing effective sealing and support, preventing deformation or damage to the end due to vibration or pressure during pouring, and further improving the overall stability and construction quality of the embedded structure. Simultaneously, the presence of the sealing element 4 creates a complete bolt insertion guide channel, ensuring precise bolt insertion during electrical equipment installation, reducing installation difficulty, and improving construction efficiency and connection reliability.

[0036] In one specific embodiment, the sealing component 4 is a flat base plate, which is simple in structure and easy to manufacture. It can be fixed to the connecting pipe 3 by full welding to form a closed end, ensuring the sealing effect. It is suitable for the pre-embedded construction process of standard turnout sleeper 5, which is convenient for mass production and reduces manufacturing and assembly costs. In another specific embodiment, the sealing component 4 is conical, with the tip of the cone facing away from the connecting plate 1. The advantage of this conical structure design is that when the pre-embedded component is placed in the turnout sleeper 5 mold, the conical end can be more easily inserted into the mold positioning hole or concrete, which helps to quickly and accurately complete the pre-embedded positioning, improves construction efficiency, and ensures the stability and verticality of the pre-embedded component during the concrete pouring process. It prevents the pre-embedded component from shifting or tilting due to improper operation, thereby ensuring the accuracy of the installation hole position and structural stability of the turnout sleeper electrical equipment.

[0037] The diameter of the connecting pipe 3 is larger than the inner diameter of the nut body 2. This is to ensure that the bolt can pass smoothly through the nut and continue to penetrate into the connecting pipe 3 during installation, avoiding jamming or interference caused by the nut threads engaging. This ensures that the bolt can be smoothly screwed into the predetermined position and reliably tightened. In addition, the larger inner diameter of the connecting pipe 3 provides a certain amount of guiding space for the bolt, reducing the difficulty of alignment during installation, improving the efficiency and accuracy of bolt installation, and avoiding connection difficulties or damage caused by poor bolt insertion, thus ensuring the normal installation and long-term stable operation of electrical equipment.

[0038] In one specific embodiment, the connecting plate 1, the nut body 2, the connecting pipe 3, and the base plate are all made of carbon steel or alloy steel. This material selection has several advantages. First, carbon steel and alloy steel have excellent mechanical properties, especially high strength and high hardness, which can significantly improve the overall load-bearing capacity and deformation resistance of the embedded structure. This ensures that the embedded parts remain structurally stable and are not prone to loosening or damage under the tensile, torque, and vibration loads generated during bolt tightening and train operation.

[0039] The pre-embedded structure for the switch sleeper electrical equipment installation in this embodiment is specifically designed for the complex operating conditions of railway systems, particularly to meet the requirements of ballastless track switch systems for adapting to high dynamic loads and strong vibration environments. Due to frequent train switching, speed changes, and impact loads during train passage, the switch sleeper 5 and electrical equipment are subjected to significant axial, longitudinal, and torsional forces, resulting in substantial dynamic load effects. This solution uses connecting plate 1 to connect at least three nut assemblies into a stable polygonal arrangement, dispersing the concentrated stress generated by the electrical equipment and preventing localized cracking of the concrete due to single-point stress. Simultaneously, the isosceles triangular or polygonal structure forms a rigid overall frame, improving overall stiffness and torsional resistance. During train operation, the nut assemblies bear alternating longitudinal and vertical loads; the fully welded structure achieves uniform force transmission and absorption, preventing fatigue damage. Furthermore, the channel structure designed for connecting pipe 3 and sealing component 4 not only ensures the guiding accuracy of bolt installation but also reduces minor vibrations and fatigue wear of the bolts during operation, ensuring long-term reliable fastening of the bolts and nuts. The overall structure can withstand repeated stress under long-term dynamic loads, exhibiting excellent fatigue resistance and extending the service life of electrical equipment and turnout sleepers 5. Dynamic load testing simulations have verified that the embedded structure maintains stable bolt connections without loosening under high-frequency, high-amplitude vibration conditions, fully meeting the dynamic load performance requirements of high-standard rail transit systems such as high-speed railways and heavy-haul railways.

[0040] The implementation principle of this scheme is as follows: A pre-embedded structure for the turnout sleeper electrical equipment, composed of components such as connecting plate 1, nut body 2, connecting pipe 3, and sealing element 4, is integrated and pre-embedded during the pouring of turnout sleeper 5, ensuring accurate positioning and secure fixation of the nut assembly inside turnout sleeper 5. During the pre-embedding process, the nut body 2 is pre-fixed into the nut mounting hole of connecting plate 1 by full welding, with its axis perpendicular to connecting plate 1. Simultaneously, connecting pipe 3 is positioned at the end of nut body 2 furthest from connecting plate 1 and is fixedly connected to nut body 2 by full welding, forming a bolt installation channel. A sealing element 4 is provided at the lower end of connecting pipe 3 to prevent concrete slurry from entering the pipe. After the entire pre-embedded structure is fixed in the turnout sleeper 5 mold by a positioning device, concrete is poured and vibrated for molding. The upper surface of connecting plate 1 is flush with the top surface of turnout sleeper 5, and the nut assembly is stably embedded inside turnout sleeper 5, forming a unified whole with the concrete. After pouring and curing, when installing the electrical equipment on turnout sleeper 5, the installation bolts are directly inserted through the pre-drilled threaded nut holes. The bolts first engage with the threads of the nut body 2, and then are further inserted into the channel of the connecting pipe 3 to achieve precise fixation of the electrical equipment. Through the overall support of the connecting plate 1, the tensile, torque, and vibration loads generated by the electrical equipment during operation are effectively distributed, enhancing the pull-out and torsional resistance of the nut assembly, preventing localized concrete cracking or structural damage to turnout sleeper 5, ensuring the electrical equipment is installed stably and reliably, and meeting the strength and durability requirements of high-standard railway systems such as ballastless track.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An embedded structure for installing electrical equipment on a turnout sleeper, used for embedding within the turnout sleeper (5), characterized in that: It includes a connecting plate (1) and at least three nut assemblies. The nut assemblies are used to mate with the mounting bolts of the turnout sleeper electrical equipment. The connecting plate (1) is used to connect and fix the nut assemblies. The axis of the nut assemblies is perpendicular to the connecting plate (1). The nut assemblies are distributed along the contour of the connecting plate (1) so that the connecting lines between adjacent nut assemblies form a polygon.

2. The pre-embedded structure for installing turnout sleeper electrical equipment according to claim 1, characterized in that: The connecting plate (1) is in the shape of an isosceles triangle, and three nut assemblies are respectively located at the three vertices of the connecting plate (1).

3. The pre-embedded structure for installing turnout sleeper electrical equipment according to claim 1, characterized in that: The connecting plate (1) is provided with a nut mounting hole. The top of the nut assembly is inserted into the nut mounting hole and fixedly connected to the connecting plate (1), so that the upper surface of the connecting plate (1) and the upper surface of the nut are flush.

4. The pre-embedded structure for installing turnout sleeper electrical equipment according to claim 3, characterized in that: The nut assembly includes a nut body (2) and a connecting tube (3). The nut body (2) is inserted into the connecting hole, and the connecting tube (3) is located at the end of the nut body (2) away from the connecting plate (1).

5. The pre-embedded structure for installing electrical equipment on turnout sleepers according to claim 4, characterized in that: The end of the connecting pipe (3) away from the nut body (2) is provided with a sealing element (4) to close the opening of the connecting pipe (3) away from the nut body (2).

6. The pre-embedded structure for installing turnout sleeper electrical equipment according to claim 4, characterized in that: The diameter of the connecting pipe (3) is larger than the inner diameter of the nut body (2).

7. The pre-embedded structure for installing turnout sleeper electrical equipment according to claim 6, characterized in that: The connecting plate (1) has a hollow center, so that the connecting plate (1) forms a frame structure composed of three connecting sides, and the width of the three connecting sides is the same.

8. The pre-embedded structure for installing electrical equipment on turnout sleepers according to claim 5, characterized in that: The sealing component (4) is a base plate.

9. The pre-embedded structure for installing turnout sleeper electrical equipment according to claim 5, characterized in that: The sealing element (4) is conical, with the tip of the cone facing away from the connecting plate (1).

10. The pre-embedded structure for installing turnout sleeper electrical equipment according to claim 8, characterized in that: The connecting plate (1), nut body (2), connecting pipe (3) and base plate are all made of carbon steel or alloy steel. The nut assembly is fixedly connected to the connecting plate (1) by full welding.

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