A multifunctional forced attraction tool for a motor train unit relay

Abstract

The utility model discloses a kind of EMU relay multifunctional forced attraction tools, it is related to EMU application maintenance technical field, including three type car module, one type car module and Fuxinghao module, each module is set customized plug (a-h), and relay is forced to be turned on by "pressing-inserting-fixing" standardization process realization.The module adopts POM insulating material, Y shape / double-sided structure adapts different vehicle type, and lock ring design can be connected with the ring buckle of four corner keys of vehicle mechanic's personal tool Y-shaped structure. Compared with traditional foreign matter forced attraction mode, maintenance efficiency is improved by 60%, and relay damage rate is reduced from 18% to 2%, the utility model makes maintenance operation convenient, maintenance process standardization, significantly improves the maintenance efficiency and maintenance quality of EMU emergency disposal, electrical debugging operation, applicable to CRH1, CRH3 and Fuxinghao full series EMU.

Description

Technical Field

[0001] This utility model relates to the field of EMU operation and maintenance technology, and in particular to a multi-functional tool that achieves forced relay engagement through a modular customized plug. Background Technology

[0002] With the rapid development of high-speed railways in my country, the operation and maintenance of EMUs, as the foundation of railway development, has also entered a stage of rapid development. At present, the Shanghai EMU Depot is mainly equipped with CRH1, CRH3 and Fuxing platform EMUs. With a large number of EMU models and a large number of train sets, maintenance and operation personnel are required to have high-level capabilities in EMU operation, maintenance, repair, emergency response and diagnosis.

[0003] The various functional systems of high-speed trains extensively utilize various types of electromagnetic relays and contactors to achieve functions such as logic control, low-power load connection, low-voltage control of high-voltage, signal transmission, and safety monitoring and protection. These, in conjunction with the microcomputer control unit, enable intelligent control of the high-speed train. However, traditional electromagnetic relays and contactors are susceptible to environmental factors and, due to their mechanical contacts, have limited lifespans. This leads to frequent relay and contactor failures during high-speed train operation, becoming a major factor contributing to train malfunctions and significantly impacting the reliability of high-speed train operation.

[0004] During the operation of high-speed trains, when a relay malfunctions and cannot operate, and the conditions for replacing the relay are not available, external force is generally used to force the relay to engage in order to ensure the normal operation of the train until it reaches the next station or maintenance depot, where ground maintenance personnel will diagnose and handle the fault. Simultaneously, during maintenance of high-speed trains, it is often necessary to force the relay to engage to screen for circuit faults, or to force engagement to achieve conduction and perform functional tests when the high-speed train cannot control the relay engagement via the SIMIT control console.

[0005] The current operating method involves using hard objects such as toothpicks, cable ties, or pins to wedge into the status indicator head of the relay, forcing the relay into an engaged state. This method carries the following risks: 1. Low maintenance efficiency. Using hard objects such as toothpicks, cable ties, and pins, which are not suitable for the size and shape of relays, usually requires repeated manual attempts to force the relay to engage, which directly affects the efficiency of handling and leads to problems such as long processing time and equipment not responding.

[0006] 2. Easily damages the relay. Using inappropriate tools to force the relay to engage can cause misalignment or deformation of the relay contacts, further leading to unreliability of the relay and intermittent failures after it is put into operation.

[0007] 3. Safety hazards exist. Using foreign objects to jam the relay status indicator head is not reliable, especially when the train is running on the track and there is a lot of vibration, which can easily cause it to loosen. This not only increases the possibility of secondary failures, but also poses personal safety hazards such as electric shock.

[0008] Existing tools require repeated attempts due to size mismatch (averaging 5-10 minutes), and the lack of a fixed structure leads to a loosening rate as high as 30%. This utility model shortens the operation time to less than 2 minutes and reduces the loosening rate to less than 5% by using a customized plug and a standardized "press-insert-fix" process. Summary of the Invention

[0009] The purpose of this utility model is to provide a multi-functional forced engagement tool for high-speed train relays to solve the problems mentioned in the background art. It can be used for online emergency response and in-depot maintenance and debugging, providing professional tooling to avoid relay damage caused by improper tooling during maintenance. When using this utility model for forced engagement of relays, simply select the corresponding plug according to the different relay models, and achieve forced conduction of the relay through the method of "pressing, inserting, and fixing," making maintenance work convenient and standardized, significantly improving the efficiency and quality of high-speed train emergency response and electrical debugging. According to data statistics from a 3-month trial at the Shanghai High-Speed ​​Train Depot, after using this tool, the relay failure rate decreased from 18% to 2%, emergency response efficiency increased by 60%, and the risk of electric shock caused by loose foreign objects was eliminated. The three-type vehicle module, the one-type vehicle module, and the Fuxing bullet train module together constitute a modular plug assembly; the locking ring is a ring-shaped slot structure that can lock the four corner key rings of the onboard mechanic; the overall material of the tool is POM material with insulation ≥20MΩ and wear resistance ≤0.05mg / 1000 times.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a multi-functional forced engagement tool for EMU relays, wherein the three-type vehicle module, the one-type vehicle module and the Fuxing Hao module are respectively equipped with plugs a to h, wherein the external structure of plugs a to h is customized according to the forced engagement requirements of the corresponding relays, and the hollow structure of plug a is nested with a Cr12MoV steel wire with a diameter of 1.2mm, and the two ends of the steel wire extend to the end of the plug to form a bending support.

[0011] Specifically, the three-type vehicle module and the one-type vehicle module are Y-shaped structures with two branches at an angle of 60°-120°, and anti-slip textures are provided at the ends of the branches; the Fuxing module is a double-sided rectangular plate structure, with plug g and plug h on the front and back sides respectively, and anti-slip ridges on the edges.

[0012] Specifically, the three-type vehicle module (1), the one-type vehicle module (2), and the Fuxing Hao module (3) can be combined into a whole through a screw structure, and the locking ring is a ring-shaped slot structure that can be connected to the ring buckle of the four corner key of the onboard mechanic's personal tools, so as to realize the integrated carrying of tools and key strings.

[0013] Specifically, the end of the plug b (1-2) is circumferentially distributed with three sets of trapezoidal friction teeth, with a tooth height of 0.5 mm and a tooth pitch of 1.2 mm. After insertion, it forms an interference fit with the internal slot of the relay housing, providing an axial holding force of not less than 5 N. Beneficial effects

[0014] The above technical solution has the following beneficial effects: Standardize work procedures. Improve and fill tool gaps in the forced engagement of relays, avoid the use of non-compliant tools and incorrect operating methods. At the same time, this set of tools significantly reduces the difficulty of operations and effectively improves work efficiency.

[0015] Reduced operational risks. It provides a safer operating method, reducing the need for operators or onboard mechanics to use other tools for forced engagement when no tools are available, thereby significantly reducing the risk of train malfunctions or electric shock to operators.

[0016] It features high convenience and integration. By using this tool kit, the forced engagement tool requirements of various relay models on the train sets assigned to the Shanghai EMU Depot can be met at this stage. At the same time, the integrated design allows it to be combined with the four-corner key carried by maintenance personnel, making it less likely to be lost and readily available. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the combined structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0019] Figure 3 This is a structural schematic diagram of the three-type vehicle module of this utility model, which is equipped with plug a (1-1), plug b (1-2), plug c (1-3), and connecting screw (1-4). Figure 4 This is a structural schematic diagram of a vehicle module of this utility model.

[0020] Figure 5 This is a structural schematic diagram of the Fuxing bullet train module of this utility model.

[0021] Figure 6 This is a schematic diagram of the combination of the present invention and the four corner keys of the vehicle mechanic.

[0022] Explanation of reference numerals in the attached diagram: 1. Type III vehicle module; 2. Type I vehicle module; 3. Fuxing bullet train module; 1-1. Plug a; 1-2. Plug b; 1-3. Plug c; 1-4. Connecting screw; 2-1. Plug d; 2-2. Plug e; 2-3. Plug f; 3-1. Plug g; 3-2. Plug h Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Embodiment 1, by... Figure 1-6 As shown, this utility model includes a three-type vehicle module (1), a one-type vehicle module (2), and a Fuxing bullet train module (3). The three-type vehicle module is provided with plug a (1-1), plug b (1-2), plug c (1-3), and connecting screw (1-4). The one-type vehicle module is provided with plug d (2-1), plug e (2-2), and plug f (2-3). The Fuxing bullet train module is provided with plug g (3-1) and plug h (3-2).

[0026] The three-type vehicle module (1), the one-type vehicle module (2), and the Fuxing Hao module (3) can be assembled into a whole by connecting screws (1-4) and are equipped with locking rings. They can be combined with the key rings of the four corner keys of existing EMUs to improve portability.

[0027] The overall structure of the three-type vehicle module (1) and the one-type vehicle module (2) is Y-shaped. The Fuxing Hao module (3) is double-sided. All three modules are made of POM, which has good insulation, wear resistance and fatigue resistance, and meets the special working conditions of forced relay engagement.

[0028] The plug a (1-1) has a hollow structure with a φ1.2mm Cr12MoV steel wire nested inside. The two ends of the steel wire extend to the plug insertion end to form a bending support, ensuring that no deformation occurs when inserted.

[0029] In this embodiment, when the EMU needs to perform forced engagement operation, the maintenance personnel first take it off from their waist and open it for use. Then, they determine the specific module required by checking the model of the EMU. Next, they select the appropriate relay forced engagement plug by observing the brand, appearance, or surface model markings of the relay. They then perform the forced engagement operation according to the structural characteristics of different plug models. Finally, after self-checking that the forced engagement operation is completed, the tool is securely installed, and there is no risk of loosening, they proceed with subsequent maintenance work.

[0030] Among them, plug a (1-1) on the three-type vehicle module (1) is particularly important. It is applicable to Siemens 3RT1016-2AF04 relays for CRH380B(L) and CR400AF / BF platform EMUs. The specific usage method is to insert it vertically. The self-test method is to check that the circular marks on both sides are completely submerged inside the housing.

[0031] Among them, plug b (1-2) on the three-car module (1) is particularly important. It is applicable to the Siemens 3RH2122 / 3RH2131 auxiliary relay of the CRH380B(L) platform EMU. The specific usage method is to press the relay indicator head until it is submerged in the relay housing, and then insert it vertically. The self-test method is: the friction teeth of plug b (1-2) are completely submerged in the housing.

[0032] Among them, plug c (1-3) on the three-type vehicle module (1) is particularly important. It is applicable to Siemens 3RH1122-2JC40 / 3RH1131-2JC40 relays of CRH380B(L) platform EMU. The specific usage method is to insert it vertically and then rotate it 90°. The self-test method is: after rotation, the plug cannot be pulled out of the housing at any angle.

[0033] Among them, plug d (2-1) on the first type of vehicle module (2) is particularly important. It is applicable to the AB brand 100-CRFBA04 relay of CRH1A platform EMU. The specific usage method is to insert it vertically and then rotate it 90°. The self-test method is: after rotation, the plug cannot be pulled out of the housing at any angle.

[0034] Among them, plug e (2-2) on module (2) of type 1 vehicle is particularly important. It is applicable to ABB brand A26D-30-10 / 0126A contactors of CRH1A platform EMU. The specific usage method is to press the contactor indicator head until it is submerged in the relay housing, and then hang it in from the top downwards. The self-test method is: plug e (2-2) is particularly important. It should fit tightly with the edge structure of the contactor indicator head without any looseness.

[0035] Among them, plug f (2-3) on module (2) of type 1 vehicle is particularly important. It is applicable to the AB brand 700-K222 contactor of CRH1A platform EMU. The specific usage method is to insert it vertically. The self-test method is to check that plug f (2-3) has been inserted into the deepest position inside the housing. This plug is an interference fit.

[0036] Among them, plug g (3-1) on the Fuxing module (3) is particularly important. It is applicable to the Siemens 3RT2015-2BB42 contactor of the CR400AF / BF platform EMU. The specific usage method is to push and press the contactor indicator head housing inside, and then hang it from the top down. The self-test method is: plug g (3-1) fits tightly with the edge structure of the contactor indicator head without looseness.

[0037] Among them, the plug h (3-2) on the Fuxing module (3) is particularly important. It is applicable to Siemens 3RH1131-2BB40 relays of CRH380B(L) and CR400AF / BF platform EMUs. The specific usage method is to push and press the contactor indicator head housing into the housing, and then hang it from the top down. The self-test method is: the plug h (3-2) fits tightly with the edge structure of the contactor indicator head, and there is no looseness.

[0038] Among them, the plug g (3-1) and plug h (3-2) on the Fuxing module (3) have limit plates with fixed trigger positions on both sides to ensure that the movement trajectory of the plug will not deviate.

[0039] Example 2: When only the Fuxing EMU needs to be inspected and repaired, the Fuxing module can be removed and carried separately. Its double-sided plug g / h can cover more than 80% of the relay models of the CR400AF / BF platform. The module is only 15mm thick and weighs about 80g, further reducing the burden on the operators.

[0040] Working principle: When the power supply conditions of the relay are met but an unknown fault occurs in the line, the exposed status indicator head of the faulty relay housing is jammed by the relay forced engagement tool, thereby forcibly engaging the relay, temporarily eliminating the relay fault, and prioritizing the operation of the EMU or providing access conditions for the EMU maintenance and debugging.

[0041] Implementation steps: 1. Confirm the train set model and relay model; 2. Disassemble and reassemble the relay forced engagement tool and select the corresponding module and plug; 3. Clean the surface dust of the relay; 4. During the operation of the EMU, confirm again that the relay cannot be activated, or under advanced maintenance conditions, confirm again that the function cannot be controlled through the SIMIT control console; 5. Use different methods to insert and secure the plug depending on its type; 6. The self-test relay is forced to activate, completing the operation; 7. During the operation of the EMU, carry out subsequent emergency handling, or operate the equipment to conduct functional tests under advanced maintenance conditions; 8. When the EMU arrives at the station to replace the undercarriage or enter the depot for maintenance, or under advanced maintenance conditions, after all the work is completed, the tooling shall be removed and reassembled for storage.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-functional forced engagement tool for a high-speed train relay, characterized in that, The modular plug assembly consists of a three-type vehicle module (1), a one-type vehicle module (2), and a Fuxing Hao module (3) adapted to CRH1, CRH3, and Fuxing Hao models. The plug assembly achieves forced relay engagement by cooperating with the relay status indicator head through a customized shape structure. The three-type vehicle module (1), one-type vehicle module (2), and Fuxing Hao module (3) are detachably assembled by connecting screws. The tool is equipped with an annular slot-type locking ring, which can be matched and buckled with the four corner key rings of the EMU.

2. The multi-functional forced engagement tool for a high-speed train relay according to claim 1, characterized in that, The three-type vehicle module (1), the one-type vehicle module (2), and the Fuxing bullet train module (3) are respectively equipped with plug a (1-1) to plug h (3-2). The external structure of plug a (1-1) to plug h (3-2) is customized according to the corresponding relay forced engagement requirements. The hollow structure of plug a (1-1) is nested with a steel wire with a diameter of 1.2mm. The two ends of the steel wire extend to the end of the plug to form a bending support.

3. The multi-functional forced engagement tool for a high-speed train relay according to claim 1, characterized in that, The three-type vehicle module (1) and the one-type vehicle module (2) are in the shape of a Y-shaped structure with two branches at an angle of 60°-120°, and anti-slip textures are provided at the ends of the branches; the Fuxing module (3) is a double-sided rectangular plate structure, with plug g (3-1) and plug h (3-2) on the front and back sides respectively, and anti-slip ridges on the edges.

4. The multi-functional forced engagement tool for a high-speed train relay according to claim 1, characterized in that, The three-type vehicle module (1), the one-type vehicle module (2), and the Fuxing Hao module (3) can be combined into a whole through a screw structure. The locking ring is designed with a ring slot, which can be connected to the ring buckle of the four corner key of the mechanic's personal tools, so as to realize the integrated carrying of tools and key chain.

5. A multi-functional forced engagement tool for a high-speed train relay according to claim 1, characterized in that, The plug b (1-2) has three sets of trapezoidal friction teeth circumferentially distributed at its end. The teeth are 0.5 mm high and 1.2 mm apart. After insertion, they form an interference fit with the internal slot of the relay housing, providing an axial holding force of not less than 5 N.

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