Device and method for preventing mistaken grounding and mistaken power transmission of electrified railway loading and unloading line
By using disconnecting switches, contact wire supports, grounding wire poles, locking pins, and operating mechanisms on electrified railway loading and unloading lines, both mechanical and electrical constraints are achieved, solving the problems of accidental grounding and accidental energization, ensuring operational safety, and improving the safety level of loading, unloading, and maintenance on electrified railways.
Patent Information
- Application Number
- CN202511137026.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-14
- Publication Date
- 2025-11-07
AI Technical Summary
In existing technologies, there are problems of accidental grounding and accidental power supply in electrified railway operations, which lead to safety hazards and equipment damage. Existing methods, relying on regulations and standards, cannot completely avoid human error.
By employing disconnecting switches, contact wire supports, grounding wire poles, locking pins, connecting chains, and operating mechanisms, the system ensures the mandatory nature of the operating sequence through both mechanical and electrical constraints, preventing accidental grounding and energization.
Completely prevent accidental grounding and energization, ensure power supply continuity and equipment and personnel safety, improve operational safety, and avoid short circuits, grounding, and electric shock accidents.
Smart Images
Figure CN120902608A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electrified railway devices, in particular to a device and method for preventing misgrounding and misfeeding of an electrified railway loading and unloading line. BACKGROUND
[0002] In an electrified railway, in order to meet the safety requirements of loading and unloading goods or performing maintenance work on the top of an electric locomotive, the contact net needs to be powered off and isolated in the corresponding loading and unloading line or locomotive preparation line section. The powered-off section is usually composed of a disconnector and a sectional insulator (as shown in FIG. 1). Figure 1
[0003] However, in actual operation, there are two serious safety hazards: first, the problem of misgrounding. When the disconnector is not disconnected, that is, the contact net is still live, the operator mistakenly suspends the protective grounding line on the contact net line, resulting in a direct grounding short circuit of the live contact net. This not only interrupts the power supply and affects the normal operation of the train, but also may cause equipment damage and even personal safety accidents; second, the problem of misfeeding. When the operation is completed and the power needs to be restored, if the operator does not remove the protective grounding line suspended on the contact net as required, he may mistakenly operate the disconnector to close the switch and feed power. This will also cause the contact net to be short-circuited to ground through the grounding line, resulting in power interruption and train operation obstruction, accompanied by serious safety risks.
[0004] The existing technology mainly relies on strict operation procedures and personnel operation specifications to avoid the above risks, but human errors are difficult to completely eliminate. Therefore, there is an urgent need for a device and method that can physically and electrically control the operation sequence and effectively prevent misgrounding and misfeeding to cause electric shock accidents of the operator. SUMMARY
[0005] The present application provides a device and method for preventing misgrounding and misfeeding of an electrified railway loading and unloading line, which solves the problem of electric shock of the operator caused by misgrounding and misfeeding in the actual operation of the electrified railway in the prior art.
[0006] In the first aspect, the present application provides a device for preventing misgrounding and misfeeding of an electrified railway loading and unloading line, comprising a disconnector, a contact line support, a grounding line rod, a locking pin, a connecting chain and an operating mechanism; one end of the contact line support is connected to the ground, and the other end of the contact line support is connected with the disconnector; the grounding line rod is arranged along the length direction of the contact line support, and the grounding line rod is connected to the contact line support; the locking pin is arranged along the width direction of the contact line 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 line rod.
[0007] In combination with the first aspect, in a possible implementation manner, the grounding wire rod is connected to the contact wire support through the upper fixing seat at one end and connected to the contact wire support through the lower fixing seat at the other end.
[0008] In combination with the first aspect, in a possible implementation manner, the operating mechanism comprises a box body and a micro switch; the micro switch is arranged in the box body; the micro switch can form a closed loop with the locking pin; when the locking pin is inserted into the box body, the micro switch is in a closed state, a closing control loop is connected, and closing operation of the disconnecting switch can be performed; when the locking pin is pulled out of the box body, the micro switch is in an open state, the closing control loop is disconnected, and the closing operation of the disconnecting switch cannot be performed.
[0009] In combination with the first aspect, in a possible implementation manner, a locking button corresponding to each operator is arranged in the box body of the operating mechanism, and the locking button is connected in series in the closing control loop.
[0010] The second aspect provides a method for preventing misconnection of a grounding wire and misfeeding of power for an electrified railway loading and unloading line, which uses the device for preventing misconnection of a grounding wire and misfeeding of power for an electrified railway loading and unloading line according to the first aspect or any possible implementation manner in combination with the first aspect, and the method for preventing misconnection of a grounding wire comprises the following steps: inserting the locking pin into the box body of the operating mechanism, at this time, the disconnecting switch is in a closing position, and the locking pin is mechanically locked and cannot be pulled out of the box body of the operating mechanism; at this time, the connecting chain pulls the grounding wire rod so that the grounding wire rod cannot be removed from the contact wire support, thereby preventing misconnection of the grounding wire.
[0011] In combination with the second aspect, in a possible implementation manner, the method for preventing misfeeding of power comprises the following steps: operating the disconnecting switch to open, at this time, the mechanical locking of the locking pin is released, and the locking pin can be pulled out of the box body of the operating mechanism; pulling out the locking pin to disconnect the micro switch from the closing control loop, and releasing the grounding wire rod so that the grounding wire rod can be removed from the contact wire support.
[0012] In combination with the second aspect, in a possible implementation manner, the method for preventing misfeeding of power further comprises the following steps: when power needs to be restored, the grounding wire rod must be hung back on the fixing seat of the contact wire support, and then the locking pin is inserted into the box body of the operating mechanism; the insertion operation triggers the micro switch to connect the closing control loop, and at this time, the disconnecting switch is allowed to be closed; when the grounding wire rod is not hung back on the support, the locking pin cannot be inserted into the box body, the micro switch remains in a disconnected state to block the closing operation, and misfeeding of power is prevented.
[0013] With reference to the second aspect, in a possible implementation manner, before the work, all workers press their own locking buttons and lock, at this time the locking button triggers the locking state and the indicator light is on; after the work is completed, all workers unlock and reset the locking button, and the indicator light is off; only when all the locking buttons are reset and the indicator light is off, the closing control circuit allows the closing.
[0014] The one or more technical solutions provided in the application have at least the following technical effects:
[0015] The application adopts a device for preventing misgrounding and misfeeding of electric railway loading and unloading line, which comprises an isolating switch, a contact line support, a grounding wire rod, a locking pin, a connecting chain and an operating mechanism; one end of the contact line support is connected to the ground, and the other end of the contact line support is connected with the isolating switch; the grounding wire rod is arranged along the length direction of the contact line support and is connected to the contact line support; the locking pin is arranged along the width direction of the contact line 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 application can completely prevent the misgrounding, i.e. prevent the operation of hanging the grounding wire when the contact network is electrified; when the isolating switch is in the closed position, the contact network is electrified, and the mechanical locking device in the operating mechanism forcibly locks the locking pin, so that the locking pin cannot be pulled out of the box. Since the locking pin is connected with the grounding wire rod through the connecting chain, the chain is in a tension state, and the grounding wire rod is firmly limited on the fixed seat of the contact line support and cannot be taken down to be hung on the contact network. This fundamentally eliminates the possibility of misgrounding in the electrified state of the contact network. It is ensured that only when the contact network has been de-energized and the lock is released, the grounding wire rod can be taken down for hanging operation, thereby preventing the short-circuit grounding accident and ensuring the continuity of power supply, equipment and personnel safety. The application is locked before operation, and when the isolating switch is opened, the mechanical lock of the locking pin is released and can be pulled out. Pulling out the locking pin will trigger the microswitch in the box to act, immediately disconnecting the closing control loop of the isolating switch, so that the closing operation cannot be performed. When the power needs to be restored, the grounding wire rod must be hung back on the fixed seat of the contact line support, and then the locking pin can be inserted into the operating mechanism box again. Inserting the locking pin will trigger the microswitch to close and connect the closing control loop, and at this time, the closing operation is allowed. The application sets a forced sequence, and if the grounding wire rod is not hung back on the support, the locking pin cannot be completely inserted into the box due to physical obstruction, i.e. the grounding wire rod position is not correct, causing the chain to relax or be blocked, at this time, the microswitch remains disconnected, and the closing operation will be strictly blocked. It is strictly required that the grounding wire must be removed before the power supply operation is restored, thereby preventing the vicious accident of closing with the grounding wire. A forced operation sequence chain of removing the grounding wire, inserting the locking pin and allowing the closing is established, and through physical and electrical double constraints, it is ensured that the grounding wire has been removed before the power supply, thereby ensuring the safety of power supply. The application sets locking buttons with locks and indicator lights in the operating mechanism box corresponding to each operator, and these buttons are connected in series in the closing control loop. Before the operation starts, each operator needs to press and lock his own button; after the operation is completed, each operator needs to unlock and reset his own button. Thus, the power supply is prevented from being restored by mistake when the operators have not all left the operation area or have not confirmed the safety, and the closing control loop has the condition of being connected only when all the operators have reset their locking buttons. This increases the safety confirmation link of the personnel state, further reducing the risk of misfeeding.The application solves the problem of electric shock of operation personnel caused by misgrounding and mispowering in electrified railway loading and unloading operation. The technical effects of ungrounding when there is power, unpowering when the ground wire is not removed and unpowering when personnel are not confirmed are realized, thereby significantly improving the intrinsic safety level of electrified railway loading and unloading and maintenance operation, effectively avoiding the accidents of catenary short circuit grounding, power supply interruption, train operation obstruction and electric shock of operation personnel caused by human error, and ensuring the safe and efficient operation of railway transportation. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings described in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0017] Figure 1 The schematic diagram of the existing catenary provided by the embodiments of the present application is shown in the figure.
[0018] Figure 2 The isometric view of the device for preventing misgrounding and mispowering of electrified railway loading and unloading line provided by the embodiments of the present application is shown in the figure.
[0019] Figure 3 The front view of the device for preventing misgrounding and mispowering of electrified railway loading and unloading line provided by the embodiments of the present application is shown in the figure.
[0020] Figure 4 The circuit diagram of the device for preventing misgrounding and mispowering of electrified railway loading and unloading line provided by the embodiments of the present application is shown in the figure.
[0021] Figure legend: 1-disconnector; 2-contact line support; 3-grounding wire rod; 4-locking pin; 5-connecting chain; 6-operating mechanism; 61-box body; 62-micro switch; 63-locking button; 7-upper fixed seat; 8-lower fixed seat; 10-section insulator. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0023] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0024] As shown in Figure 1 When the isolating switch 1 is in the closed position, the contact net of the loading and unloading area is turned on, so that the contact net of the loading and unloading area is electrified, thereby meeting the normal operation of the electric locomotive; when the isolating switch 1 is in the open position, the power supply of the contact net of the loading and unloading area is disconnected, and the contact net of the loading and unloading area and the electrified contact net are electrically insulated through the two-end sectional insulator 10, thereby meeting the requirement that the contact net of the loading and unloading area is not electrified, at this time, the grounding wire for protection can be connected, and the loading and unloading of goods or the top maintenance operation of the electric locomotive can be carried out.
[0025] Mis-sending of electricity can cause two results, one of which is that the grounding wire is not removed, resulting in failure to send electricity; the other is that the grounding wire is removed, and the operator is not removed, at this time, the mis-sending of electricity will cause electric shock.
[0026] The embodiment of the present application provides a device for preventing mis-grounding wire and mis-sending of electricity for electrified railway loading and unloading line, as shown in Figures 1-3 The device comprises an isolating switch 1, a contact wire support 2, a grounding wire 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 with the isolating switch 1; the grounding wire rod 3 is arranged along the length direction of the contact wire support 2, and the grounding wire 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 with the output end of the operating mechanism 6, and the other end of the locking pin 4 is connected with one end of the connecting chain 5; the other end of the connecting chain 5 is connected with the grounding wire rod 3.
[0027] Exemplarily, the operating mechanism 6 adopts an electric form, when the isolating switch 1 is in the closed position, the locking pin 4 is mechanically locked, at this time, the locking pin 4 cannot be pulled out from the box 61 of the electric operating mechanism 6; when the isolating switch 1 is in the open position, the locking pin 4 is mechanically unlocked in the box 61 of the electric operating mechanism 6, at this time, the locking pin 4 can be pulled out from the electric operating mechanism 6.
[0028] In the embodiment of the present application, as shown in Figures 1-3 the upper fixing seat 7 and the lower fixing seat 8 are further included; one end of the grounding wire rod 3 is connected to the contact wire support 2 through the upper fixing seat 7, and the other end of the grounding wire rod 3 is connected to the contact wire support 2 through the lower fixing seat 8.
[0029] In the embodiment of the present application, as shown in Figures 1-3 the operating mechanism 6 includes the box 61 and the micro switch 62; the micro switch 62 is arranged in the box 61; the micro switch 62 can form a closed loop with the locking pin 4, when the locking pin 4 is inserted into the box 61, the micro switch 62 is in a closed state, the closed control loop is connected, and the closing operation of the isolating switch 1 can be performed; when the locking pin 4 is pulled out from the box 61, the micro switch 62 is in an open state, the closed control loop is disconnected, and the closing operation of the isolating switch 1 cannot be performed.
[0030] Exemplarily, since the electric control in the electric operating mechanism 6 is provided with the micro switch 62, when the locking pin 4 is inserted into the box 61 of the electric operating mechanism 6, the micro switch 62 connects the control loop, and the isolating switch 1 can perform the closing operation; when the locking pin 4 is pulled out from the box 61 of the electric operating mechanism 6, the micro switch 62 disconnects the control loop, and the closing operation of the isolating switch 1 cannot be performed.
[0031] In the embodiment of the present application, as shown in Figures 1-4 the operating box is provided with the locking buttons 63 corresponding to each operator in the box 61 of the operating mechanism 6, and each button is connected in series into the closed control loop.
[0032] The embodiment of the present application provides a method for preventing misconnection of a grounding wire and misfeeding of electricity on an electrified railway loading and unloading line, and a device for preventing misconnection of a grounding wire and misfeeding of electricity on an electrified railway loading and unloading line, as shown in Figure 4 the method for preventing misconnection of a grounding wire includes the following steps: inserting the locking pin 4 into the box 61 of the operating mechanism 6, at this time, the isolating switch 1 is in the closed position, the locking pin 4 is mechanically locked and cannot be pulled out from the box 61 of the operating mechanism 6; at this time, the connecting chain 5 pulls the grounding wire rod 3 so that the grounding wire rod 3 cannot be taken off from the contact wire support 2, thereby preventing misconnection of the grounding wire.
[0033] For example, when the isolating switch 1 is in the closed position, the locking pin 4 cannot be pulled out of the box 61 of the electric operating mechanism 6, and thus the grounding rod 3 cannot be pulled off the overhead line support, i.e. it is impossible to hang the grounding rod 3 on the live overhead line, thereby preventing the operation of mistakenly hanging the grounding wire.
[0034] As shown in the embodiment of the present application, Figures 1-4 Preventing the mistaken power supply further includes the following steps: operating the isolating switch 1 to open, at this time, the mechanical locking of the locking pin 4 is released, and the locking pin 4 can be pulled out of the box 61 of the operating mechanism 6; pulling out the locking pin 4 to disconnect the micro switch 62 from the closed control circuit, and at the same time, releasing the grounding rod 3 to enable it to be pulled off the overhead line support 2.
[0035] As shown in the embodiment of the present application, Figures 1-4 Preventing the mistaken power supply includes the following steps: when the power supply needs to be restored, the grounding rod 3 must be hung back on the fixed seat of the overhead line support 2, and then the locking pin 4 is inserted into the box 61 of the operating mechanism 6; the insertion action triggers the micro switch 62 to connect the closed control circuit, and at this time, the isolating switch 1 is allowed to be closed; when the grounding rod 3 is not hung back on the support, the locking pin 4 cannot be inserted into the box 61, and the micro switch 62 remains disconnected to block the closing operation and prevent the mistaken power supply.
[0036] For example, when the isolating switch 1 is in the open position, the mechanical locking of the locking pin 4 in the box 61 of the electric operating mechanism 6 is released, and the locking pin 4 can be pulled out of the electric operating mechanism 6, at this time, the grounding rod 3 can be pulled off the overhead line support, and thus the grounding rod 3 can be hung on the live overhead line. If the grounding rod 3 is not pulled off the overhead line and placed on the live overhead line support, the locking pin 4 cannot be inserted into the box 61 of the electric operating mechanism 6, and the closing operation of the isolating switch 1 cannot be performed, thereby achieving the purpose of preventing the mistaken power supply.
[0037] For example, the process of pulling off the grounding rod 3 includes: the overhead line in the loading and unloading area is live under normal conditions to ensure the normal operation of electric locomotives. In this state, the grounding rod 3 needs to be pulled off, and the grounding rod 3 needs to be lifted upwards so that the hook of the grounding rod 3 can be pulled out of the upper fixed seat 7. At this time, the mechanical locking of the locking pin 4 in the box of the electric operating mechanism 6 is in the locked state and cannot be pulled out, and thus the grounding rod 3 cannot be pulled out of the upper fixed seat 7 of the grounding rod 3 due to the pulling of the locking pin 4 and the connecting chain 5, and the mistaken grounding can be prevented.
[0038] As shown in the embodiment of the present application, Figures 1-4As shown, before work, all workers press their own locking buttons 63 and lock, at which time the button triggers the locking state and the indicator light is on; after work, all workers unlock and reset the locking button 63, at which time the indicator light is off; only when all locking buttons 63 are reset and the indicator light is off, the closing control circuit allows to be turned on.
[0039] For example, the electric operating mechanism 6 box is provided with a micro switch 62 for realizing electrical locking of the locking pin 4. When the locking pin 4 is inserted, the micro switch 62 is turned on, the closing control circuit is turned on, and the closing operation of the disconnector 1 can be performed; when the locking pin 4 is pulled out, the micro switch 62 is turned off, the closing control circuit is turned off, and the closing operation of the disconnector 1 cannot be performed.
[0040] For example, in order to prevent workers from not leaving the work area, each worker is also provided with a corresponding electrical locking button 63. The electrical locking button 63 of the worker is a non-reset mushroom head button, which is provided with a protective cover that can be locked with a padlock, and has an indicator light. After the overhead contact line of the work area is powered off and the grounding wire is hung, the worker takes the key to open the protective cover of the corresponding locking button 63 in the electric operating mechanism 6 box, presses the button and locks, at which time the locking button 63 indicator light is on. After work is completed, the worker takes the key to open the protective cover of the corresponding locking button 63 in the electric operating mechanism 6 box, resets the button and locks, at which time the locking button 63 indicator light is off. When all locking buttons 63 are reset and the indicator light is off, the closing operation of the disconnector 1 can be performed.
[0041] For example, the present application solves the problem of electric shock caused by misgrounding and misfeeding in the electrified railway loading and unloading operation. The technical effects of not being able to hang the grounding wire when there is electricity, not being able to feed electricity when the grounding wire is not removed, and not being able to feed electricity when the personnel are not confirmed are achieved, thereby significantly improving the intrinsic safety level of electrified railway loading and unloading and maintenance work, effectively avoiding accidents such as overhead contact line short circuit grounding, power interruption and train operation obstruction caused by human error, and ensuring the safe and efficient operation of railway transportation.
[0042] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.
[0043] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features thereof can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.
Claims
1. An electric railway loading and unloading line device for preventing misgrounding and mispowering, characterized in that, The device comprises an isolating switch (1), a contact wire support (2), a ground wire 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 with the isolating switch (1); The ground wire rod (3) is arranged along the length direction of the contact wire support (2), and the ground wire 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 with the output end of the operating mechanism (6), and the other end of the locking pin (4) is connected with one end of the connecting chain (5); the other end of the connecting chain (5) is connected with the ground wire 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, The device further comprises an upper fixing seat (7) and a lower fixing seat (8); One end of the ground wire rod (3) is connected to the contact wire support (2) through the upper fixing seat (7), and the other end of the ground wire rod (3) is connected to the contact wire support (2) through the lower fixing seat (8).
3. 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) comprises a box body (61) and a micro switch (62); The micro switch (62) is arranged in the box body (61); The micro switch (62) can form a closed loop with the locking pin (4); when the locking pin (4) is inserted into the box body (61), the micro switch (62) is in a closed state, the closing control loop is connected, and the closing operation of the isolating switch (1) can be performed; when the locking pin (4) is pulled out of the box body (61), the micro switch (62) is in an open state, the closing control loop is disconnected, and the closing operation of the isolating switch (1) cannot be performed.
4. The device for preventing misconnection of ground wire and misoperation of power supply of electrified railway loading and unloading line according to claim 3, wherein, A locking button (63) corresponding to each operator is arranged in the box body (61) of the operating mechanism (6), and the locking button (63) is connected in series in the closing control loop.
5. A method for preventing misgrounding and mispowering of an electrified railway loading and unloading track, characterized in that, The device for preventing misconnection of ground wire and misoperation of power supply of electrified railway loading and unloading line according to any one of claims 1-4, Preventing misconnection of ground wire comprises the following steps: Insert the locking pin (4) into the box body (61) of the operating mechanism (6); at this time, the isolating switch (1) is in the closing position, and the locking pin (4) is mechanically locked and cannot be pulled out of the box body (61) of the operating mechanism (6); at this time, the connecting chain (5) pulls the ground wire rod (3) so that the ground wire rod (3) cannot be removed from the contact wire support (2), thereby preventing misconnection of ground wire.
6. The method of claim 5, wherein the method further comprises: Preventing misoperation of power supply comprises the following steps: Operate the isolating switch (1) to open; at this time, the mechanical locking of the locking pin (4) is released, and the locking pin (4) can be pulled out of the box body (61) of the operating mechanism (6); pull out the locking pin (4) to disconnect the micro switch (62) from the closing control loop, and release the ground wire rod (3) so that the ground wire rod (3) can be removed from the contact wire support (2).
7. The method of claim 6, wherein the method further comprises the steps of: connecting the first and second ground wires to the first and second ground terminals, respectively, of the first and second ground switches, respectively; and connecting the first and second power wires to the first and second power terminals, respectively, of the first and second power switches, respectively. Preventing misoperation of power supply further comprises the following steps: When the grounding wire pole (3) is hung back to the fixed seat of the contact wire support (2), the locking pin (4) is inserted into the box (61) of the operating mechanism (6); the insertion action triggers the micro switch (62) to turn on the closing control circuit, and only then is the closing of the isolating switch (1) allowed; When the grounding wire pole (3) is not hung back to the support, the locking pin (4) cannot be inserted into the box (61), and the micro switch (62) remains in the off state to block the closing operation and prevent misfeeding of electricity.
8. The method for preventing misgrounding and misfeeding of electricity in an electrified railway loading and unloading line according to claim 5, characterized in that, Before operation, all operating personnel press their own locking buttons (63) and lock them, at which time the locking buttons (63) trigger the locking state and the indicator lights are on; After the operation is completed, all operating personnel unlock and reset the locking buttons (63), and the indicator lights are off; Only when all the locking buttons (63) are reset and the indicator lights are off, the closing control circuit is allowed to be turned on.