Device for preventing misgrounding and mispowering of electrified railway loading and unloading line

Abstract

The application discloses an electric railway loading and unloading line device for preventing misgrounding and mispower transmission, which comprises an isolating switch, a catenary support, a grounding wire rod, a locking pin, a connecting chain and an operating mechanism; one end of the catenary support is connected to the ground, and the other end of the catenary support is connected with the isolating switch; the grounding wire rod is arranged along the length direction of the catenary support and is connected to the catenary support; the locking pin is arranged along the width direction of the catenary support; one end of the locking pin is connected with the output end of the operating mechanism, and the other end of the locking pin is connected with one end of the connecting chain; the other end of the connecting chain is connected with the grounding wire rod. The device solves the problem of electric shock of operating personnel caused by misgrounding and mispower transmission in the long-term electric railway loading and unloading line operation. The technical effects of the device are that the grounding wire cannot be hung when there is power, power cannot be transmitted when the grounding wire is not removed, and power cannot be transmitted when personnel are not confirmed.

Description

Technical Field

[0001] This application relates to the field of electrified railway equipment technology, and in particular to a device for preventing accidental grounding and accidental power supply on an electrified railway loading and unloading line. Background Technology

[0002] In electrified railways, to meet safety requirements for loading and unloading goods or performing maintenance work on the roof of electric locomotives, it is necessary to de-energize the overhead contact line in the corresponding loading / unloading line or locomotive maintenance line section. This de-energized section typically consists of disconnecting switches and sectional insulators (such as...). Figure 1 (As shown).

[0003] However, two serious safety hazards exist in actual operation: First, there is the problem of accidental grounding. When the disconnecting switch is not disconnected, i.e., the contact network is still energized, the operator may mistakenly suspend the protective grounding wire on the contact network line, causing the energized contact network to directly ground and short-circuit. This will not only interrupt power supply and affect the normal operation of trains, but may also cause equipment damage or even personal injury accidents. Second, there is the problem of accidental energization causing electric shock to the operator. When the work is completed and power needs to be restored, if the operator fails to remove the protective grounding wire suspended on the contact network as required, and then mistakenly operates the disconnecting switch to close the circuit and restore power, this will also cause the contact network to short-circuit to ground through the grounding wire, resulting in power outages and train operation disruptions, accompanied by serious safety risks.

[0004] Existing technologies primarily rely on strict operating procedures and personnel operation standards to avoid the aforementioned risks, but human error is difficult to completely eliminate. Therefore, there is an urgent need for a device and method that can enforce operational sequences through physical mechanisms and electrical controls to effectively prevent accidental grounding and energization accidents. Utility Model Content

[0005] This application provides a device to prevent accidental grounding and energization on an electrified railway loading and unloading line, thus solving the problem of electric shock to workers caused by accidental grounding and energization during actual operation of electrified railways in the prior art.

[0006] This utility model provides a device for preventing accidental grounding and energization on an electrified railway loading and unloading line, including a disconnecting switch, a contact wire support, a grounding rod, a locking pin, and an operating mechanism; one end of the contact wire support is connected to the ground, and the other end of the contact wire support is connected to the disconnecting switch; the grounding rod is arranged along the length direction of the contact wire support and is connected to the contact wire support; the locking pin is arranged along the width direction of the contact wire support; one end of the locking pin is connected to the output end of the operating mechanism, and the other end of the locking pin is connected to the grounding rod.

[0007] In one possible implementation, the device for preventing accidental grounding and energization on an electrified railway loading and unloading line further includes a connecting chain and an upper fixing seat; the other end of the locking pin is connected to one end of the connecting chain; the other end of the connecting chain is connected to the grounding rod; the grounding rod is connected to the contact wire support near the disconnecting switch via the upper fixing seat.

[0008] In one possible implementation, the device for preventing accidental grounding and energization on an electrified railway loading and unloading line further includes a lower fixing seat; the other end of the grounding rod is connected to the contact wire support via the lower fixing seat.

[0009] In one possible implementation, the operating mechanism includes a housing and a micro switch; the micro switch is disposed within the housing; the micro switch can form a closed circuit with the locking pin; when the locking pin is inserted into the housing, the micro switch is in a closed state, the closing control circuit is connected, and the closing operation of the isolating switch can be performed; when the locking pin is pulled out from the housing, the micro switch is in an open state, the closing control circuit is disconnected, and the closing operation of the isolating switch cannot be performed.

[0010] In one possible implementation, an interlock button corresponding to each operator is provided inside the housing of the operating mechanism, and the interlock button is connected in series to the closing control circuit.

[0011] One or more technical solutions provided in this application have at least the following technical effects:

[0012] This utility model embodiment employs a device for preventing accidental grounding and energization on an electrified railway loading and unloading line, including a disconnecting switch, a contact wire support, a grounding wire pole, a locking pin, a connecting chain, and an operating mechanism;

[0013] One end of the contact wire support is connected to the ground, and the other end is connected to a disconnecting switch. A grounding rod is installed along the length of the contact wire support and connected to it. A locking pin is installed along the width of the contact wire support. One end of the locking pin is connected to the output end of the operating mechanism, and the other end is connected to one end of a connecting chain. The other end of the connecting chain is connected to the grounding rod. This application can completely prevent accidental grounding, i.e., prevent the operation of grounding while the contact wire is energized. When the disconnecting switch is in the closed position, the contact wire is energized, and the mechanical locking device in the operating mechanism forcibly locks the locking pin, preventing it from being pulled out of the housing. Because the locking pin is connected to the grounding rod through the connecting chain, the chain is in a taut state, and the grounding rod is firmly restricted to the fixed seat of the contact wire support, preventing it from being removed and hung on the contact wire. This fundamentally eliminates the possibility of accidental grounding while the contact wire is energized. This design ensures that the grounding rod can only be removed for connection operations after the contact network has been de-energized and the interlocking mechanism has been released. This prevents short-circuit grounding accidents and guarantees power supply continuity, equipment safety, and personnel safety. This application features a pre-operation interlocking mechanism. When the disconnecting switch is opened, the mechanical interlocking of the interlocking pin is released and it can be pulled out. Pulling out the interlocking pin triggers the microswitch inside the enclosure, immediately disconnecting the closing control circuit of the disconnecting switch, preventing the closing operation. When power needs to be restored, the grounding rod must first be hung back on the fixed base of the contact network support before the interlocking pin can be reinserted into the operating mechanism enclosure. Inserting the interlocking pin triggers the microswitch to close, connecting the closing control circuit, at which point the closing operation is permitted. This application has a mandatory sequence. If the grounding rod is not hung back on the support, the interlocking pin will not be fully inserted into the enclosure due to physical obstruction—that is, the grounding rod is not positioned correctly, causing the chain to be loose or jammed. In this case, the microswitch remains open, and the closing operation will be strictly blocked. This application mandates that the grounding wire must be removed before power can be restored, thus preventing serious accidents caused by closing the circuit with the grounding wire still attached. A mandatory operational sequence chain is established, from removing the grounding wire to inserting the locking pin and then allowing power to be restored. Through both physical and electrical constraints, it ensures that the grounding wire has been removed before power is restored, thereby guaranteeing power supply safety. This application includes locking buttons with locks and indicator lights, corresponding to each operator, installed within the operating mechanism housing. These buttons are connected in series to the power-closing control circuit. Before work begins, each operator must press and lock their own button; after work, each operator must unlock and reset their own button. This prevents accidental restoration of power before all operators have evacuated the work area or before safety has been confirmed. The power-closing control circuit is only ready to connect when all operators have reset their locking buttons. This adds a safety confirmation step for personnel status, further reducing the risk of accidental power restoration. This application solves the long-standing problem of electric shock to operators caused by accidental grounding and power restoration in electrified railway loading and unloading operations.This technology achieves the technical effect that ground wires cannot be hung when there is power, power cannot be supplied when ground wires are not removed, and power cannot be supplied when personnel are not confirmed. This significantly improves the inherent safety level of loading, unloading, and maintenance operations on electrified railways, effectively avoids accidents such as short circuits and grounding of the contact network, power outages, train operation obstruction, and electric shocks to workers caused by human error, and ensures the safe and efficient operation of railway transportation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of an existing overhead contact line provided for an embodiment of this application;

[0016] Figure 2 An isometric view of a device for preventing accidental grounding and accidental energization on an electrified railway loading and unloading line, provided in an embodiment of this application.

[0017] Figure 3 A front view of a device for preventing accidental grounding and accidental energization on an electrified railway loading and unloading line, provided in an embodiment of this application;

[0018] Figure 4 A circuit diagram of a device for preventing accidental grounding and accidental energization on an electrified railway loading and unloading line, provided in an embodiment of this application.

[0019] Icons: 1-Disconnecting switch; 2-Contact wire support; 3-Grounding pole; 4-Locking pin; 5-Connecting chain; 6-Operating mechanism; 61-Box; 62-Micro switch; 63-Locking button; 7-Upper mounting base; 8-Lower mounting base; 10-Segmented insulator. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0022] like Figure 1 As shown, when the disconnecting switch 1 is in the closed position, the contact network of the loading and unloading area is connected, so that the contact network of the loading and unloading area is energized, thereby meeting the normal operation of the electric locomotive; when the disconnecting switch 1 is in the open position, the power supply of the contact network of the loading and unloading area is disconnected, and the contact network of the loading and unloading area is electrically insulated from the energized contact network through the segmented insulators 10 at both ends, thereby meeting the requirement that the contact network of the loading and unloading area is de-energized. At this time, the grounding wire for protection can be connected for loading and unloading of goods or for maintenance work on the top of the electric locomotive.

[0023] This utility model provides a device for preventing accidental grounding and accidental energization on electrified railway loading and unloading lines, such as... Figure 1-3 As shown, the device includes a disconnecting switch 1, a contact wire support 2, a grounding rod 3, a locking pin 4, a connecting chain 5, and an operating mechanism 6. One end of the contact wire support 2 is connected to the ground, and the other end of the contact wire support 2 is connected to the disconnecting switch 1. The grounding rod 3 is installed along the length of the contact wire support 2 and is connected to the contact wire support 2. The locking pin 4 is installed along the width of the contact wire support 2. One end of the locking pin 4 is connected to the output end of the operating mechanism 6, and the other end of the locking pin 4 is connected to one end of the connecting chain 5. The other end of the connecting chain 5 is connected to the grounding rod 3.

[0024] For example, the operating mechanism 6 is electrically operated. When the disconnecting switch 1 is in the closed position, the locking pin 4 is mechanically locked and cannot be pulled out from the housing 61 of the electric operating mechanism 6. When the disconnecting switch 1 is in the open position, the locking pin 4 is mechanically unlocked in the housing 61 of the electric operating mechanism 6, and the locking pin 4 can be pulled out from the electric operating mechanism 6.

[0025] In the embodiments of this application, such as Figure 1-3 As shown, it also includes an upper fixed seat 7 and a lower fixed seat 8; one end of the grounding wire rod 3 is connected to the contact wire support 2 through the upper fixed seat 7, and the other end of the grounding wire rod 3 is connected to the contact wire support 2 through the lower fixed seat 8.

[0026] In the embodiments of this application, such as Figure 1-3 As shown, the operating mechanism 6 includes a housing 61 and a micro switch 62. The micro switch 62 is located inside the housing 61. The micro switch 62 can form a closed circuit with the locking pin 4. When the locking pin 4 is inserted into the housing 61, the micro switch 62 is in the closed state, the closing control circuit is connected, and the closing operation of the isolating switch 1 can be performed. When the locking pin 4 is pulled out from the housing 61, the micro switch 62 is in the open state, the closing control circuit is disconnected, and the closing operation of the isolating switch 1 cannot be performed.

[0027] For example, since the electrical control of the electric operating mechanism 6 is provided with a micro switch 62, when the locking pin 4 is inserted into the housing 61 of the electric operating mechanism 6, the micro switch 62 connects the control circuit, and the isolating switch 1 can perform the closing operation; when the locking pin 4 is pulled out from the housing 61 of the electric operating mechanism 6, the micro switch 62 disconnects the control circuit, and the isolating switch 1 cannot be closed.

[0028] In the embodiments of this application, such as Figure 1-4 As shown, the control box has interlock buttons 63 corresponding to each operator inside the control mechanism 6 housing 61, and each button is connected in series to the closing control circuit.

[0029] This utility model provides a method for preventing accidental grounding and energization on electrified railway loading and unloading lines, and a device for preventing accidental grounding and energization on electrified railway loading and unloading lines, such as... Figure 4 As shown, the steps to prevent accidental grounding include: inserting the locking pin 4 into the housing 61 of the operating mechanism 6. At this time, the disconnecting switch 1 is in the closed position, and the locking pin 4 is mechanically locked and cannot be pulled out from the housing 61 of the operating mechanism 6. At this time, the connecting chain 5 pulls the grounding rod 3 so that it cannot be removed from the contact wire support 2, thereby preventing accidental grounding.

[0030] For example, when the disconnecting switch 1 is in the closed position, the locking pin 4 cannot be pulled out of the housing 61 of the electric operating mechanism 6. Therefore, the grounding rod 3 is pulled by the connecting chain 5 and cannot be removed from the contact wire support. That is, it is impossible to hang the grounding rod 3 on the energized contact wire, thereby preventing the operation of accidentally hanging the grounding wire.

[0031] In the embodiments of this application, such as Figure 1-4As shown, preventing accidental power supply also includes the following steps: operating the disconnecting switch 1 to open, at which time the mechanical lock of the locking pin 4 is released, and the locking pin 4 can be pulled out from the housing 61 of the operating mechanism 6; pulling out the locking pin 4 causes the micro switch 62 to disconnect the closing control circuit, and at the same time, the grounding rod 3 is released so that it can be removed from the contact wire support 2.

[0032] In the embodiments of this application, such as Figure 1-4 As shown, preventing accidental power supply includes the following steps: When power needs to be restored, the grounding rod 3 must first be hung back on the fixed seat of the contact wire support 2, and then the locking pin 4 is inserted into the operating mechanism 6 housing 61; the insertion action triggers the micro switch 62 to connect the closing control circuit, and only then is the operation of the isolating switch 1 to close allowed; when the grounding rod 3 is not hung back on the support, the locking pin 4 cannot be inserted into the housing 61, and the micro switch 62 remains in the open state to block the closing operation and prevent accidental power supply.

[0033] For example, when the disconnecting switch 1 is in the open position, the locking pin 4 is released from the mechanical lock within the housing 61 of the electric operating mechanism 6, and can be pulled out from the electric operating mechanism 6. At this time, the grounding rod 3 can be removed from the contact wire support, thereby hanging the grounding rod 3 on the de-energized contact wire. If the grounding rod 3 is not removed from the contact wire and placed on the de-energized contact wire support, the locking pin 4 cannot be inserted into the housing 61 of the electric operating mechanism 6, and the closing operation of the disconnecting switch 1 cannot be performed, thus achieving the purpose of preventing electric shock to workers caused by accidental energization.

[0034] For example, the process of removing the grounding rod 3 includes: When the contact network in the loading and unloading area is normally energized, it can ensure the normal operation of the electric locomotive. In this state, to remove the grounding rod 3, it needs to be lifted upwards so that the hook of the grounding rod 3 can be removed from the upper fixed seat 7. At this time, the locking pin 4 is mechanically locked in the electric operating mechanism 6 box and cannot be pulled out. Therefore, the grounding rod 3 cannot be removed from the upper fixed seat 7 due to the pull of the locking pin 4 and the connecting chain 5, which can prevent accidental grounding.

[0035] In the embodiments of this application, such as Figure 1-4 As shown, before operation, the operator presses and locks their own interlock button 63. At this time, the button triggers the interlock state and the indicator light illuminates. After the operation is completed, the operator unlocks and resets the interlock button 63. At this time, the indicator light goes out. The closing control circuit is only allowed to be connected when all interlock buttons 63 are reset and the indicator lights go out.

[0036] For example, the electric operating mechanism 6 is equipped with a micro switch 62 that electrically interlocks with the locking pin 4. When the locking pin 4 is inserted, the micro switch 62 is turned on, the closing control circuit is connected, and the closing operation of the isolating switch 1 can be performed; when the locking pin 4 is pulled out, the micro switch 62 is turned off, the closing control circuit is disconnected, and the closing operation of the isolating switch 1 cannot be performed.

[0037] For example, to prevent workers from failing to evacuate the work area, each worker is also equipped with an electrical interlock button 63. The worker's electrical interlock button 63 is a non-resetting mushroom-shaped button with a protective cover for attaching a padlock and an indicator light. After the contact network in the work area is de-energized and the grounding wire is installed, the worker uses a key to open the protective cover of the corresponding electrical interlock button 63 in the electric operating mechanism box 6, presses the button, and locks it; at this time, the indicator light of the interlock button 63 illuminates. After the work is completed, the worker uses a key to open the protective cover of the corresponding interlock button 63 in the electric operating mechanism box 6, resets the button, and locks it; at this time, the indicator light of the interlock button 63 goes out. Only when all interlock buttons 63 are reset and their indicator lights are off can the closing operation of the isolating switch 1 be performed.

[0038] For example, this application solves the long-standing problem of electric shock to workers caused by accidental grounding and energization during loading and unloading operations on electrified railways. It achieves the technical effect that grounding wires cannot be hung when energized, power cannot be supplied when grounding wires are not removed, and power cannot be supplied without personnel confirmation. This significantly improves the inherent safety level of loading, unloading, and maintenance operations on electrified railways, effectively avoiding accidents such as short circuits in the overhead contact system, power outages, train disruptions, and electric shocks to workers caused by human error, thus ensuring the safe and efficient operation of railway transportation.

[0039] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0040] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. An electric railway loading and unloading line device for preventing misgrounding and mispowering, characterized in that, It includes a disconnecting switch (1), a contact wire support (2), a grounding wire pole (3), a locking pin (4), and an operating mechanism (6); One end of the contact wire support (2) is connected to the ground, and the other end of the contact wire support (2) is connected to the disconnecting switch (1); The grounding rod (3) is arranged along the length direction of the contact wire support (2), and the grounding rod (3) is connected to the contact wire support (2); The locking pin (4) is arranged along the width direction of the contact wire support (2); One end of the locking pin (4) is connected to the output end of the operating mechanism (6), and the other end of the locking pin (4) is connected to the grounding rod (3).

2. The device for preventing misgrounding and mispowering of the electrified railway loading and unloading track according to claim 1, characterized in that, It also includes a connecting chain (5) and an upper fixing seat (7); The other end of the locking pin (4) is connected to one end of the connecting chain (5); the other end of the connecting chain (5) is connected to the grounding rod (3); The grounding rod (3) is close to the disconnecting switch (1) and connected to the contact wire support (2) via the upper fixing seat (7).

3. The device for preventing misgrounding and mispowering of the electrified railway loading and unloading track according to claim 1, characterized in that, It also includes a lower fixing seat (8); The other end of the grounding rod (3) is connected to the contact wire support (2) via the lower fixing seat (8).

4. The device for preventing misgrounding and mispowering of the electrified railway loading and unloading track according to claim 1, characterized in that, The operating mechanism (6) includes a housing (61) and a micro switch (62); The micro switch (62) is disposed inside the housing (61); The micro switch (62) can form a closed circuit with the locking pin (4). When the locking pin (4) is inserted into the housing (61), the micro switch (62) is in the closed state, the closing control circuit is connected, and the closing operation of the isolating switch (1) can be performed. When the locking pin (4) is pulled out from the housing (61), the micro switch (62) is in the open state, the closing control circuit is disconnected, and the closing operation of the isolating switch (1) cannot be performed.

5. The device for preventing accidental grounding and accidental energization on an electrified railway loading and unloading line according to claim 4, characterized in that, An interlock button (63) corresponding to each operator is provided in the housing (61) of the operating mechanism (6), and the interlock button (63) is connected in series to the closing control circuit.

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