Signal protection device for independent area of locomotive inspection pit

Abstract

The utility model relates to the technical field of locomotive inspection, in particular to a signal protection device for an independent area of a locomotive inspection pit, which comprises a track arranged at the top of a hardened track bed and a cable which is buried and laid and is used for transmitting a control signal and a power supply, a first contact net strut and a second contact net strut are fixedly mounted at the left end and the right end, in front of the track, of the top of the hardened track bed respectively. Through mutual interlocking action of the auxiliary switch, the electrified flasher, the grounding notice board and the annunciator circuit, the device has the advantages of preventing a locomotive from mistakenly entering an independent area and preventing personnel from electric shock casualty accidents, and improving operation safety guarantee through safety equipment, and solves the problem that in similar daily operation, the safety of the locomotive is influenced. The problems that an electric locomotive enters a non-power area and common C-type accidents of railway traffic are caused when an isolation switch operator forgets to supply power to an independent area, and maintenance personnel climbing on the roof get electric shock and casualties are caused when the isolation switch operator often forgets to supply power to the independent area are solved.

Description

Technical Field

[0001] This utility model relates to the field of locomotive inspection technology, specifically a protective signal device for an independent area of ​​a locomotive inspection pit. Background Technology

[0002] Locomotive inspection refers to the regular or irregular comprehensive inspection of locomotives to ensure that all components operate stably and reliably in good condition, thus extending their service life. After a certain period of use, locomotive components may experience abnormal changes, necessitating planned inspections and maintenance. Domestic railway locomotive depots (turnaround depots, maintenance depots) are equipped with locomotive inspection pits. To facilitate inspections on the top of the locomotive, insulated barriers are installed at both ends of the overhead contact line within the pit area. This isolated area can be called an "independent zone," designed to prevent personnel from being electrocuted during rooftop inspections.

[0003] Currently, when an electric locomotive needs to enter the inspection pit area, the isolating switch operator must first remove the auxiliary ground wire, then close the isolating switch to supply power to the independent zone, and then give the locomotive a hand signal to allow entry into the independent zone before the electric locomotive can proceed. Only after obtaining power in the independent zone can the locomotive enter the inspection pit area. After entering the independent zone, the isolating switch operator disconnects the isolating switch, de-energizes the independent zone, and connects the ground wire in the independent zone, putting the locomotive into a waiting-for-maintenance state. However, in similar operations, the following safety accidents occasionally occur:

[0004] 1. The operator of the disconnect switch forgot to energize the independent zone, causing the electric locomotive to enter the de-energized zone and triggering a Class C railway traffic accident;

[0005] 2. Operators of disconnect switches often forget to disconnect the power to the independent zone, resulting in electric shock injuries and fatalities to maintenance personnel who climb onto the roof of the vehicle.

[0006] To address the problems mentioned above, we propose a protective signal device for the independent area of ​​the locomotive inspection pit. Utility Model Content

[0007] The purpose of this utility model is to provide a protective signal device for the independent zone of a locomotive inspection pit, which has the advantages of preventing locomotives from accidentally entering the independent zone and preventing electric shock injuries and deaths of personnel. It improves the safety of operations by using safety equipment, and solves the problems that occur in daily similar operations, such as the occasional occurrence of the isolating switch operator forgetting to supply power to the independent zone, causing electric locomotives to enter the unpowered zone and causing general Class C railway traffic accidents, and the frequent occurrence of the isolating switch operator forgetting to disconnect the power to the independent zone, resulting in electric shock injuries and deaths of maintenance personnel climbing on the roof.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a protective signal device for an independent area of ​​a locomotive inspection pit, comprising a track installed on top of a hardened track bed and a cable laid underground for transmitting control signals and power. A first contact wire support and a second contact wire support are fixedly installed at the left and right ends of the top of the hardened track bed in front of the track, respectively. A contact wire is installed at the upper end of the first and second contact wire supports. Both ends of the upper part of the contact wire are equipped with catenary insulators, and both ends of the lower part of the contact wire are equipped with segmented insulators. A disconnecting switch is installed at the top of the second contact wire support. The outer side of the second contact wire support... The surface is equipped with three clamps, one at the top, one at the middle, and one at the bottom. A live flasher is fixedly installed on the top of the clamp located in the middle of the outer surface of the second contact wire support. A grounding indicator sign is fixedly installed on the outer surface of the second contact wire support between the middle and bottom clamps. An auxiliary switch box is fixedly installed at the bottom of the bottom clamp. A grounding lead connected to a disconnecting switch is provided on the left side of the second contact wire support. A vertical rotating rod with the disconnecting switch in contact at the top is provided on the right side of the second contact wire support. A disconnecting switch operating handle is welded to the lower end of the vertical rotating rod. A control box and a battery box are provided on the right end of the top of the hardened track bed.

[0009] Preferably, a locomotive inspection pit is provided at the corresponding position of the hardened track bed within the center of the track and the independent area.

[0010] Preferably, the contact wire has an independent zone between the two catenary insulators and the segment insulators.

[0011] Preferably, the grounding warning sign is an LED blue font display screen.

[0012] Preferably, the auxiliary switch box contains an auxiliary switch body and an auxiliary switch flange connection plate.

[0013] Preferably, two symmetrically arranged shunting signals are fixedly installed on the top of the hardened track bed behind the track.

[0014] Preferably, a box support is provided between the lower end of the outer side of the control box and the battery box and the top of the hardened track bed.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Based on the original "human defense" measures, this utility model adopts the "technical defense" facilities of this device, which has a significant effect on preventing accidents and is an effective measure to manage the hidden dangers of accidents in the independent area of ​​locomotive inspection pit.

[0017] 2. This utility model adopts a protective device based on a similar principle to the independent area of ​​the current locomotive inspection pit, filling a market gap and having great significance for promotion. At the same time, it has high safety in use. Based on the existing disconnecting switch catenary insulator and segmented insulator, it adds a switch position circuit inspection function and can provide switch status prompts and alarms. It also adds a protective signal machine and interlocks with the switch position. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the installation effect of this utility model;

[0019] Figure 2 This utility model Figure 1 Another perspective structural diagram;

[0020] Figure 3 This utility model Figure 1 A partial diagram of the exploded structure;

[0021] Figure 4 This is a schematic diagram of the circuit principle of this utility model.

[0022] In the diagram: 1. Catenary insulator; 2. Segment insulator; 3. First contact wire support post; 4. Shunting signal; 5. Locomotive inspection pit; 6. Cable; 7. Control box; 8. Disconnecting switch; 9. Independent zone; 10. Disconnecting switch operating handle; 11. Vertical rotating rod; 12. Auxiliary switch box; 13. Battery box; 14. Grounding lead; 15. Live flasher; 16. Grounding warning sign; 17. Second contact wire support post; 18. Track; 19. Hardened track bed; 20. Box support; 21. Hoop frame; 22. Contact wire. 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] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The components of this application, including the catenary insulator 1, segment insulator 2, first contact wire support 3, shunting signal 4, locomotive inspection pit 5, cable 6, control box 7, disconnecting switch 8, independent zone 9, disconnecting switch operating handle 10, vertical rotating rod 11, auxiliary switch box 12, battery box 13, grounding lead 14, live flasher 15, grounding warning sign 16, second contact wire support 17, track 18, hardened track bed 19, box support 20, clamp frame 21, and contact wire 22, are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Example

[0027] Please see Figures 1-4As shown, this utility model provides a technical solution: a protective signal device for an independent zone of a locomotive inspection pit, including a track 18 set on top of a hardened track bed 19 and a cable 6 laid underground for transmitting control signals and power. Two symmetrically arranged shunting signals 4 are fixedly installed on the top of the hardened track bed 19 behind the track 18. A locomotive inspection pit 5 is set at the center of the track 18 and within the independent zone 9, at a corresponding position on the hardened track bed 19. A first contact wire support 3 and a second contact wire support 17 are fixedly installed on the left and right ends of the top of the hardened track bed 19 in front of the track 18, respectively. A contact wire 22 is set at the upper end of the first contact wire support 3 and the second contact wire support 17. Both ends of the upper part of the contact wire 22 are provided with catenary insulators 1, and both ends of the lower part of the contact wire 22 are provided with segmented insulators 2. An independent zone 9 is set between the two catenary insulators 1 and the segmented insulators 2. A disconnecting switch 8 is set at the top of the second contact wire support 17. The outer surface of the support column 17 is provided with three clamps 21, one at the top, one at the middle, and one at the bottom. A live flasher 15 is fixedly installed on the top of the clamp 21 located in the middle of the outer surface of the second contact network support column 17. A grounding indicator 16 is fixedly installed on the outer surface of the second contact network support column 17 located between the middle and bottom clamps 21. The grounding indicator 16 is an LED blue font display screen. An auxiliary switch box 12 is fixedly installed at the bottom of the bottom clamp 21. The auxiliary switch box 12 contains an auxiliary switch body and an auxiliary switch flange connection plate. A grounding lead 14 connected to the disconnecting switch 8 is provided on the left side of the second contact network support column 17. A vertical rotating rod 11 with the disconnecting switch 8 in contact at the top is provided on the right side of the second contact network support column 17. A disconnecting switch operating handle 10 is welded to the lower end of the vertical rotating rod 11. A control box 7 and a battery box 13 are provided on the right end of the top of the hardened track bed 19. A box bracket 20 is provided between the lower outer end of the control box 7 and the battery box 13 and the top of the hardened track bed 19.

[0028] This technical solution: The catenary insulator 1 primarily serves as insulation and isolation; the segmented insulator 2 provides insulation and isolation between the contact wires on both sides, while ensuring the smooth passage of the locomotive pantograph; the first contact wire support 3 and the second contact wire support 17 support the upper structure of the contact wire 22; the shunting signal 4 protects the independent zone 9 and displays train signal instructions to the locomotive driver, with the signal display meaning and installation limits complying with the relevant requirements of the "Railway Technical Management Specifications"; and the locomotive inspection pit 5 provides a space passage for maintenance personnel when inspecting the bottom of the locomotive. For ease of maintenance, the control box 7 houses the control equipment, and its installation limits comply with the relevant requirements of the "Railway Technical Management Specifications." The independent zone 9 provides a safe, power-free space for electric locomotives to climb and inspect, while also providing power to the locomotive when it enters or exits. The isolating switch 8 (which has a grounding function) allows power to be supplied to and disconnected from the independent zone 9, and provides grounding protection to prevent electric shock from induced current. The vertical rotating rod 11 connects and drives the upper contact blade, the isolating switch operating handle 10, and the lower auxiliary switch shaft to rotate. When the disconnector switch operating handle 10 is used, the horizontal rotational force of the operator is transmitted to the vertical rotating rod 11 through the handle when the disconnector switch 8 needs to be operated, thus driving the top contact blade of the disconnector switch 8 into the corresponding position. The auxiliary switch box 12 provides rain and dust protection for the auxiliary switch body and auxiliary switch flange connection plate inside. The battery box 13 provides dust and rain protection for the battery inside the box. The installation clearance complies with the relevant requirements of the "Railway Technical Management Specifications". The grounding lead 14 is connected at both ends to the earth and the grounding contact of the disconnector switch 8, and is tied to the grounding wire. The side of the second contact wire support 17 is designed to discharge induced current from independent zone 9 into the ground and trigger overcurrent protection in case of incorrect energization. The live flasher 15 emits a red flashing signal when independent zone 9 is energized, i.e., when disconnector switch 8 is in the energized position, as a reminder. The grounding indicator 16 displays "Grounding Confirmation" when independent zone 9 is de-energized, i.e., when disconnector switch 8 is in the grounded position, reminding personnel to confirm that the disconnector switch is in the grounded position before locomotive maintenance. The box bracket 20 provides protection against foreign object collisions on the outside of control box 7 and battery box 13.

[0029] Appendix Figure 4 Component description:

[0030] 2-1: Fuse assembly, installed in control box 7, including RD1-RD8, of which RD4 is installed in battery box 13, to provide overcurrent protection for their respective downstream circuits;

[0031] 2-2: Isolation transformer, installed in control box 7, is used to isolate the single-stage grounded (N) 220V power supply and convert it into an ungrounded 220V to prevent circuit malfunction caused by grounding in the downstream circuit.

[0032] 2-3: Silicon rectifier transformer, installed in control box 7, provides DC24V power to the subsequent circuits;

[0033] 2-4: Safety relay, installed in control box 7, is used to control the signal lights, flashing lights (2-6), and provide corresponding displays for the "grounding confirmation" sign. It adopts gravity-type railway signal relay. In the event of a circuit fault, the relay loses its magnetism and falls, which is a safe state to prevent circuit malfunction. SDJ (energizing relay) checks whether the isolating switch is in the energized position according to the contact conditions of 2-5 (auxiliary switch). JDJ (energizing relay) checks whether the isolating switch is in the grounded position according to the contact conditions of 2-5 (auxiliary switch).

[0034] 2-5: Auxiliary switch, installed and connected to the lower end of the vertical rotating rod 11 and placed in the auxiliary switch box 12. Its function is to check the contact position of the disconnecting switch contacts. It adopts a multi-angle, multi-position switch and selects the contact group that best matches the disconnecting switch stroke during installation and commissioning to ensure that the auxiliary switch stroke and the disconnecting switch position are precisely matched.

[0035] 2-6: Live flasher 15: When the disconnect switch is in the energized position, the flasher emits a red flashing light, which means that the contact wire in the independent area is energized and roof work is prohibited.

[0036] 2-7: Grounding indicator sign 16 uses an LED display screen. When the disconnecting switch 8 is in the grounding position, the grounding indicator sign 16 displays the blue text "Grounding Confirmation", indicating to the workers that the non-energized area is not live and has been grounded. After the workers confirm that the grounding protection measures are reliable, they can carry out rooftop work.

[0037] 2-8: Signal transformer, installed inside shunting signal 4, converts 220V power to the voltage level required by signal bulb 2-9;

[0038] 2-9: Signal bulb, installed in the signal light room, its function is to convert electrical energy into light energy to provide a light source for the signal lens assembly;

[0039] 2-10: Battery pack, the security system is located inside the battery box 13. Its function is to provide power to SDJ and JDJ after a power outage. The critical circuit can still check the position of the isolating switch, and the live flasher 15 and the grounding indicator 16 can still function.

[0040] Circuit operating principle:

[0041] Scenario 1: The isolating switch 8 is rotated, which in turn rotates the auxiliary switch 2-5. The SDJ energizing contact inside the auxiliary switch 2-5 is disconnected. After rotating to the grounding position, the corresponding inspection grounding contact inside the auxiliary switch 2-5 is connected. The SDJ is de-energized and falls down, while the JDJ is energized and picks up. The rear contacts of the 3rd and 4th groups of the SDJ and the front contacts of the 3rd and 4th groups of the JDJ are connected to the 220V power supply of the blue light of signal A. The rear contacts of the 5th and 6th groups of the JDJ and the front contacts of the 5th and 6th groups of the JDJ are connected to the 220V power supply of the blue light of signal B. Signals A and B display blue lights, indicating that the locomotive is prohibited from entering the independent area 9 of the inspection pit.

[0042] At the same time, the front contacts of JDJ groups 1 and 7 are connected to the 24V power supply of grounding indicator 16 (2-7). The indicator displays a blue "Grounding Confirmation", reminding the operator to confirm the grounding before proceeding with the roof inspection.

[0043] Scenario 2: The isolating switch 8 is rotated, causing auxiliary switch 2-5 to rotate as well. Auxiliary switch 2-5 disconnects the JDJ energizing contact. After rotating to the power supply position, the corresponding inspection energizing contact inside auxiliary switch 2-5 is activated. JDJ de-energizes and falls, SDJ energizes and rises. The 3rd and 4th group front contacts of SDJ connect to the 220V power supply for the white light of signal A; the 5th and 6th group front contacts of SDJ connect to the 220V power supply for the white light of signal B. Signals A and B display white lights, indicating that the locomotive is moving forward into the independent inspection pit area 9.

[0044] At the same time, the front contacts of groups 1 and 7 of SDJ are connected to the 24V power supply of the energized flasher 15 (2-6), and the flasher emits a red strobe light, prohibiting operators from inspecting the vehicle roof.

[0045] Scenario 3: When the 220V power supply fails, the shunting signal 4 loses its 220V power supply and the signal is off. The locomotive moves according to the manual hand signal. The 2-10 battery pack provides 24V power to the 2-6 live flasher 15 and the 2-7 grounding warning sign 16 in the control circuit and execution circuit. The other circuit principles are the same as those described in Scenario 1 and 2.

[0046] Scenario 4: The probability of this scenario occurring is extremely low. If the 2-6 live flasher 15 and 2-7 grounding warning sign 16 fail to display due to some reason, the corresponding next step of the operation can only be carried out after the disconnecting switch 8 is manually confirmed to be in a safe position. The equipment maintenance personnel should be notified in a timely manner to repair it as soon as possible.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A protective signal device for an independent area of ​​a locomotive inspection pit, comprising a track (18) installed on top of a hardened track bed (19) and a cable (6) laid underground for transmitting control signals and power supply, characterized in that: The top of the hardened track bed (19) is fixedly installed with a first contact wire support (3) and a second contact wire support (17) at the left and right ends in front of the track (18). A contact wire (22) is provided at the upper end of the first contact wire support (3) and the second contact wire support (17). A catenary insulator (1) is provided at both ends of the upper part of the contact wire (22), and a segmented insulator (2) is provided at both ends of the lower part of the contact wire (22). A disconnecting switch (8) is provided at the top of the second contact wire support (17). Three clamps (21) are provided on the outer surface of the second contact wire support (17). The clamp (21) located in the middle of the outer surface of the second contact wire support (17) is located at the top. A live flasher (15) is fixedly installed. A grounding warning sign (16) is fixedly installed on the outer surface of the second contact wire support (17) located between the middle and lower clamps (21). An auxiliary switch box (12) is fixedly installed at the bottom of the lower clamps (21). A grounding lead (14) connected to the disconnecting switch (8) is provided on the left side of the second contact wire support (17). A vertical rotating rod (11) with the disconnecting switch (8) in contact with the upper end is provided on the right side of the second contact wire support (17). A disconnecting switch operating handle (10) is welded to the lower end of the vertical rotating rod (11). A control box (7) and a battery box (13) are provided at the right end of the top of the hardened track bed (19).

2. The locomotive inspection pit independent zone protection signal device according to claim 1, characterized in that: Locomotive inspection pits (5) are provided at the center of the track (18) and within the independent area (9), at the corresponding position of the hardened track bed (19).

3. The locomotive inspection pit independent zone protection signal device according to claim 1, characterized in that: The contact wire (22) has an independent zone (9) between the two catenary insulators (1) and the segment insulators (2).

4. The locomotive inspection pit independent zone protection signal device according to claim 1, characterized in that: The grounding warning sign (16) is an LED blue font display screen.

5. A protective signal device for an independent area of ​​a locomotive inspection pit according to claim 1, characterized in that: The auxiliary switch box (12) contains an auxiliary switch body and an auxiliary switch flange connection plate.

6. The locomotive inspection pit independent zone protection signal device according to claim 1, characterized in that: The top of the hardened track bed (19) is fixedly installed with two symmetrically arranged shunting signals (4) behind the track (18).

7. The locomotive inspection pit independent zone protection signal device according to claim 1, characterized in that: A box support (20) is provided between the lower end of the outer side of the control box (7) and the battery box (13) and the top of the hardened track bed (19).

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