Pantograph practical training device and circuit

Abstract

The utility model relates to a pantograph practical training device and circuit, and the circuit comprises a transformer which is connected with 220V alternating current; the control circuit comprises a first branch circuit, a second branch circuit and a third branch circuit, the first ends of the first branch circuit, the second branch circuit and the third branch circuit are connected with the live wire output end of the transformer, and the second ends of the first branch circuit, the second branch circuit and the third branch circuit are connected with the zero wire output end of the transformer; the first branch is sequentially provided with a pantograph rising switch and a coil of a pantograph rising relay from the first end to the second end; the second branch is sequentially provided with a pantograph descending switch and a coil of a pantograph descending relay from the first end to the second end; and the third branch is sequentially provided with a first normally open contact of the pantograph rising relay and a pantograph rising electromagnetic valve of the air supply unit from the first end to the second end. A worker can observe each part of the pantograph and the working principle of the pantograph more visually on the ground and observe circuit connection and gas circuit connection of the pantograph.

Description

Technical Field

[0001] This disclosure relates to the field of subway vehicles and rail vehicles, specifically to a pantograph training device and control circuit. Background Technology

[0002] As the power source for subway vehicles, the pantograph allows them to obtain electrical energy from the overhead contact line. Therefore, it is crucial for employees to understand its working principles, daily operation, maintenance procedures, and troubleshooting. The pantograph is also included as a skill competition item, and can be used in these competitions. However, because the pantograph is installed on the roof of the vehicle, this presents significant difficulties for employees in learning and understanding it directly. For example, rooftop operations pose safety hazards, and insufficient air supply from the vehicle itself often prevents the competition from proceeding normally. Utility Model Content

[0003] To overcome the problem that the existing pantograph is installed on the top of the vehicle, which makes it very difficult for employees to learn and intuitively understand the pantograph, this utility model provides a pantograph training device.

[0004] To achieve the above objectives, this disclosure provides a pantograph training circuit, comprising:

[0005] Transformer, connected to 220V AC power; and

[0006] The control circuit includes a first branch, a second branch, and a third branch. The first terminals of the first, second, and third branches are connected to the live wire output terminal of the transformer, and the second terminals of the first, second, and third branches are connected to the neutral wire output terminal of the transformer.

[0007] The coils of the pantograph lifting switch and the pantograph lifting relay are installed sequentially from the first end to the second end of the first branch.

[0008] The coils of the pantograph lowering switch and the pantograph lowering relay are installed sequentially from the first end to the second end in the second branch.

[0009] The third branch is installed sequentially from the first end to the second end with the first normally open contact of the lifting relay and the lifting solenoid valve of the air supply unit.

[0010] Optionally, the control circuit further includes a fourth branch and a fifth branch, the first ends of the fourth branch and the fifth branch being connected to the first end of the first branch, and the second ends of the fourth branch and the fifth branch being connected to the second end of the first branch.

[0011] The fourth branch is installed sequentially from the first end to the second end with the second normally open contact of the raising relay, the normally closed contact of the lowering relay, and the raising indicator light. The wire between the normally closed contact of the lowering relay and the raising indicator light is connected to the wire between the coil of the raising switch and the raising relay through a wire.

[0012] The fifth branch is equipped with the normally open contact of the pantograph lowering relay, the normally closed contact of the pantograph raising relay, and the pantograph lowering indicator light sequentially from the first end to the second end. The wire between the normally closed contact of the pantograph raising relay and the pantograph lowering indicator light is connected to the wire between the pantograph lowering switch and the coil of the pantograph lowering relay through a wire.

[0013] Optionally, the pantograph training circuit also includes an emergency stop switch, an air switch, and a battery switch;

[0014] The emergency stop switch is located between the battery switch and the transformer. The emergency stop switch and the battery switch are connected in series and installed between the live wire output terminal of the transformer and the first terminal of the first branch.

[0015] Secondly, this embodiment provides a pantograph training device, comprising:

[0016] Base;

[0017] The bracket consists of two brackets, which are installed at intervals on the base.

[0018] The connecting rod has two ends connected to two brackets respectively;

[0019] A pantograph, mounted on a base, wherein the horizontal structure of the pantograph's contact plates is perpendicular to the extension direction of the connecting rod; and

[0020] The air supply unit is connected to the pantograph and controls the pantograph's raising and lowering through the pantograph training circuit of any of the above embodiments, so that the pantograph can contact or move away from the connecting rod.

[0021] Optionally, the height of the bracket is 2000 mm to 1600 mm.

[0022] Optionally, the height of the bracket is 1700 mm.

[0023] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0024] By designing a control circuit that includes a pantograph raising switch, a pantograph raising relay, a pantograph lowering switch, a pantograph lowering relay, a normally open contact of the pantograph raising relay, and a pantograph raising solenoid valve for the air supply unit, the pantograph raising and lowering function control and its linkage with the air supply unit were realized. These components are connected in parallel to the live and neutral wires of the transformer, forming a closed circuit. Based on operator commands or automatic control signals, the corresponding components are activated to achieve the pantograph raising and lowering action, while ensuring coordinated operation between the pantograph raising process and the air supply unit. Workers can more intuitively observe the various components of the pantograph and their working principles, as well as the pantograph circuit connections and air circuit connections, from the ground. Attached Figure Description

[0025] Figure 1 This is a pantograph training circuit diagram illustrated according to an exemplary embodiment of the present disclosure.

[0026] Figure 2 This is a front view of a pantograph training device according to an exemplary embodiment of the present disclosure.

[0027] Figure 3 This is a side view of a pantograph training device according to an exemplary embodiment of the present disclosure.

[0028] Explanation of icon numbers

[0029] 11. First branch; 111. Pantograph raising switch; 112. Pantograph raising relay coil; 12. Second branch; 121. Pantograph lowering relay coil; 122. Pantograph lowering switch; 13. Third branch; 131. First normally open contact of the pantograph raising relay; 132. Pantograph raising solenoid valve of the air supply unit; 14. Fourth branch; 141. Second normally open contact of the pantograph raising relay; 142. Normally closed contact of the pantograph lowering relay; 143. Pantograph raising indicator light; 15. Fifth branch; 151. Normally open contact of the pantograph lowering relay; 152. Normally closed contact of the pantograph raising relay; 153. Pantograph lowering indicator light; 20. Transformer; 31. Emergency stop switch; 32. Air switch; 33. Battery switch; 100. Base; 200. Bracket; 300. Connecting rod; 400. Pantograph; 500. Distribution cabinet. Detailed Implementation

[0030] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "front," "rear," "left," and "right" are used for ease of description based on the drawing orientations of the corresponding figures, while "inner" and "outer" are defined based on the contours of the corresponding components themselves. Terms such as "first" and "second" used in this disclosure are used to distinguish one element from another and do not have sequential or importance implications. Furthermore, when the following description refers to the figures, unless otherwise indicated, the same numbers in different figures represent the same or similar elements.

[0032] Please see Figure 1 In a first aspect, this disclosure provides a pantograph training circuit, including a transformer 20 and a control circuit. The transformer 20 can be connected to 220V AC power. The control circuit may include a first branch 11, a second branch 12, and a third branch 13. The first ends of the first branch 11, second branch 12, and third branch 13 can be connected to the live wire output terminal of the transformer 20, and the second ends of the first branch 11, second branch 12, and third branch 13 can be connected to the neutral wire output terminal of the transformer 20. A pantograph raising switch 111 and a pantograph raising relay coil 112 can be sequentially installed from the first end to the second end of the first branch 11. A pantograph lowering switch 122 and a pantograph lowering relay coil 121 can be sequentially installed from the first end to the second end of the second branch 12. A first normally open contact 131 of the pantograph raising relay and a pantograph raising solenoid valve 132 of the air supply unit can be sequentially installed from the first end to the second end of the third branch 13.

[0033] Understandably, by designing a control circuit that includes a pantograph raising switch 111, a pantograph raising relay, a pantograph lowering switch 122, a pantograph lowering relay, a normally open contact of the pantograph raising relay, and a pantograph raising solenoid valve for the air supply unit, the raising and lowering function of the pantograph 400 and its linkage with the air supply unit are realized. These components are connected in parallel to the live and neutral wires of the transformer 20, forming a closed circuit. Based on operator instructions or automatic control signals, the corresponding components are activated to achieve the raising and lowering action of the pantograph 400, while ensuring coordinated operation between the pantograph raising process and the air supply unit. Workers can more intuitively observe the various components of the pantograph 400 and their working principles from the ground, and observe the circuit and air connections of the pantograph 400.

[0034] In one implementation, please refer to Figure 1The control circuit also includes a fourth branch 14 and a fifth branch 15. The first ends of the fourth branch 14 and the fifth branch 15 are connected to the first end of the first branch 11, and the second ends of the fourth branch 14 and the fifth branch 15 are connected to the second end of the first branch 11. The fourth branch 14, from its first end to its second end, is sequentially equipped with the second normally open contact 141 of the raising relay, the normally closed contact 142 of the lowering relay, and the raising indicator light 143. The wire between the normally closed contact 142 of the lowering relay and the raising indicator light 143 is connected via a wire to the wire between the raising switch 111 and the coil 112 of the raising relay. The fifth branch 15, from its first end to its second end, is sequentially equipped with the normally open contact 151 of the lowering relay, the normally closed contact 152 of the raising relay, and the lowering indicator light 153. The wire between the normally closed contact 152 of the raising relay and the lowering indicator light 153 is connected via a wire to the wire between the lowering switch 122 and the coil 121 of the lowering relay.

[0035] Understandably, this technical solution achieves the raising and lowering control function of the pantograph 400 by designing multiple control circuit branches. Specifically, the first branch 11 controls the raising of the pantograph 400 via the raising switch 111 and the raising relay; the second branch 12 controls the lowering of the pantograph 400 via the lowering switch 122 and the lowering relay; and the third branch 13 controls the operation of the raising solenoid valve 132 of the air supply unit via the contacts of the raising relay. Furthermore, the fourth branch 14 and the fifth branch 15 indicate the raising and lowering status of the pantograph via interconnected contacts and indicator lights, and are linked to the circuits of the raising switch 111 and the lowering switch 122 to ensure safer and more reliable operation.

[0036] In one implementation, please refer to Figure 1 The pantograph training circuit also includes an emergency stop switch 31, an air switch 32, and a battery switch 33. The emergency stop switch 31 is located between the battery switch 33 and the transformer 20, connected in series, and installed between the live wire output of the transformer 20 and the first terminal of the first branch 11. The transformer 20 converts the mains power to the required voltage. Through the multiplexer and relays in the control circuit, the actual operation of the pantograph 400 can be easily simulated. Specifically, the raising switch 111 and lowering switch 122 control the raising and lowering processes of the pantograph, respectively. The raising and lowering relays are connected in a loop, enabling more precise control and indication. Furthermore, the four-branch and five-branch connection modes, combined with indicator lights, clearly and intuitively display the operating status of the pantograph 400 and provide necessary protection functions. For example, the emergency stop switch 31 and air switch 32 can cut off the power supply to ensure user safety.

[0037] Please see Figures 1 to 3Here's an example of the working principle and process: First, connect the mobile air compressor to the air inlet of the distribution cabinet 500 and the air outlet to the pantograph 400. Turn on the power to the air compressor to start supplying air to the system. When the pressure gauge on the air supply unit reaches 0.45MPa, turn on the power to the distribution cabinet 500. The operator turns the emergency stop button on and off the air switch 32. The power indicator light illuminates. Press the pantograph raising button once, and the pantograph raising relay is energized. The pantograph raising indicator light 143 illuminates, and the normally open contact of the relay closes. Together with the normally closed contact of the pantograph lowering relay, they form a self-locking circuit. Even if the operator releases the pantograph raising button, the pantograph raising relay coil remains energized. After the normally open contact of the pantograph raising relay closes, the pantograph raising solenoid valve is energized, supplying air pressure to the pantograph 400, causing it to rise within 8 seconds. When the operator presses the pantograph lowering button, the pantograph lowering relay coil is energized, the lowering indicator light 153 illuminates, the normally closed contact of the lowering relay opens, the pantograph raising relay coil is de-energized, and the pantograph raising solenoid valve stops supplying air to the pantograph 400. After the system has vented, the pantograph 400 slowly lowers within 8 seconds. Simultaneously, the normally open contact 151 of the lowering relay closes. Similarly, when the operator releases the lowering button, the lowering circuit forms a self-locking mechanism, keeping the lowering relay coil energized while the raising relay coil is de-energized. This prevents the pantograph 400 from suddenly springing up due to system malfunction, thus avoiding injury. Because the emergency stop button is installed at the very beginning of the main circuit, the operator can press the emergency stop button in case of an accident requiring the pantograph raising or lowering operation to be stopped. This disconnects the entire circuit, improving safety. When not in use, the entire module can be disassembled and stored.

[0038] Please see Figures 1 to 3 Secondly, this embodiment provides a pantograph training device, including a base 100, a bracket 200, a connecting rod 300, a pantograph 400, and an air supply unit. Two brackets 200 are installed at intervals on the base 100. The two ends of the connecting rod 300 are connected to the two brackets 200 respectively. The pantograph 400 is mounted on the base 100, and the horizontal structure of the contact plate of the pantograph 400 is perpendicular to the extension direction of the connecting rod 300. The air supply unit is connected to the pantograph 400, and the pantograph 400 is raised and lowered by the pantograph training circuit of any of the above embodiments, allowing the pantograph 400 to contact or move away from the connecting rod 300. The pantograph training device is independent of the vehicle body and installed on the ground. This device ensures high safety during competitions, eliminates the need to impound the vehicle, eliminates the need for power outage reporting, is located away from real 1500V high-voltage lines, allows for timely ground testing, facilitates evaluation, and can also be used for future training and teaching.

[0039] In one embodiment, the height of the support 200 is 2000 mm to 1600 mm.

[0040] In one embodiment, the height of the bracket 200 is 1700 mm.

[0041] Understandably, to ensure the pantograph 400 is grounded and easily moved, we designed a load-bearing base 100 for it, covered with an insulating rubber sheet for both insulation and slip resistance. A long steel pipe (connecting rod 300) is used to simulate the overhead contact line. Two steel pipes 200, 1700mm high, are placed at both ends of the load-bearing base as supports (the maximum working height of the pantograph 400 is 2300mm, but the actual operating height is 1700-1800mm), ensuring both the normal working height of the pantograph 400 and its suitability for daily operation. A steel pipe approximately 1500mm long is connected to the support columns at both ends via an aluminum alloy elbow, simulating the main contact line; this "main line" has no voltage. To best simulate the operation of the pantograph 400 on a subway vehicle, we have installed a distribution cabinet 500, which contains a transformer 20, an air switch 32, a pantograph lifting relay, a ventilation unit, and terminal blocks. The front of the enclosure features a pantograph raising indicator light 153, a power indicator light, a pantograph raising switch 122, a battery switch, an emergency stop button, and an enclosure lock. Each side of the enclosure has a connection port for easy connection of the air inlet and outlet pipes. This design facilitates operator operation and provides a clear understanding of wiring and pneumatic control. It allows for pantograph raising time adjustment, simulation of related faults, and pressure adjustment. Operators can visually observe the components and working principles of the pantograph 400 from the ground, as well as its circuit and pneumatic connections. The pantograph 400 raising and lowering time can be independently controlled, along with fault simulation and pressure adjustment, without site restrictions, allowing for testing of the same equipment at various maintenance sites. For example, workers can adjust the height of the pantograph 400 to adjust the pressure between the pantograph 400 and the connecting rod 300.

[0042] This invention has been described through embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this invention.

Claims

1. A pantograph training circuit, characterized in that, include: Transformer (20) is connected to 220V AC power; as well as The control circuit includes a first branch (11), a second branch (12), and a third branch (13). The first ends of the first branch (11), the second branch (12), and the third branch (13) are connected to the live wire output terminal of the transformer (20), and the second ends of the first branch (11), the second branch (12), and the third branch (13) are connected to the neutral wire output terminal of the transformer (20). The first branch (11) is equipped with a lifting switch (111) and a lifting relay coil (112) in sequence from the first end to the second end. The second branch (12) is installed with the pantograph lowering switch (122) and the pantograph lowering relay coil (121) sequentially from the first end to the second end. The third branch (13) is installed with the first normally open contact (131) of the lifting relay and the lifting solenoid valve (132) of the air supply unit in sequence from the first end to the second end.

2. The pantograph training circuit according to claim 1, characterized in that, The control circuit further includes a fourth branch (14) and a fifth branch (15), the first ends of the fourth branch (14) and the fifth branch (15) being connected to the first end of the first branch (11), and the second ends of the fourth branch (14) and the fifth branch (15) being connected to the second end of the first branch (11). The fourth branch (14) is installed with the second normally open contact (141) of the raising relay, the normally closed contact (142) of the lowering relay and the raising indicator light (143) in sequence from the first end to the second end. The wire between the normally closed contact (142) of the lowering relay and the raising indicator light (143) is connected to the wire between the raising switch (111) and the coil (112) of the raising relay through a wire. The fifth branch (15) is installed with the normally open contact (151) of the lowering relay, the normally closed contact (152) of the raising relay, and the lowering indicator light (153) in sequence from the first end to the second end. The wire between the normally closed contact (152) of the raising relay and the lowering indicator light (153) is connected to the wire between the lowering switch (122) and the coil (121) of the lowering relay through a wire.

3. The pantograph training circuit according to claim 2, characterized in that, The pantograph training circuit also includes an emergency stop switch (31), an air switch (32), and a battery switch (33). The emergency stop switch (31) is located between the battery switch (33) and the transformer (20). The emergency stop switch (31) and the battery switch (33) are connected in series and installed between the live wire output terminal of the transformer (20) and the first terminal of the first branch (11).

4. A pantograph training device, characterized in that, include: Base (100); The bracket (200) is two in number and is installed at intervals on the base (100); A connecting rod (300) is provided, with its two ends connected to the two brackets (200) respectively. A pantograph (400) is mounted on the base (100), and the horizontal structure of the contact piece of the pantograph (400) is perpendicular to the extension direction of the connecting rod (300). as well as An air supply unit is connected to the pantograph (400) and controls the pantograph (400) to rise and fall through the pantograph training circuit according to any one of claims 1 to 3, so that the pantograph (400) can contact or move away from the connecting rod (300).

5. The pantograph training device according to claim 4, characterized in that, The height of the bracket (200) is 2000 mm to 1600 mm.

6. The pantograph training device according to claim 5, characterized in that, The height of the bracket (200) is 1700 mm.

Images