Pantograph bracket with pressure detection function

Abstract

This invention discloses a pantograph bracket with pressure detection function, belonging to the field of pantograph technology. It includes a bracket body and an integrated control system. A connecting end seat is fixedly installed at the end of the lower arm, and a pressure-detecting turntable is installed at the end of the rotating support arm. Balance measuring shafts, rotatably connected to the pressure-detecting turntable, are installed on both sides of the connecting end seat. A pressure-contact piston disc is connected to the outer wall of the balance measuring shaft via a torsion connector. By installing the pressure-detecting turntable and balance measuring shaft at the rotating part of the lower arm and upper frame, the lower arm and upper frame gradually develop an angle during pantograph raising. This allows for precise acquisition of the pantograph raising time during the raising phase, achieving accurate monitoring of the raising time, avoiding equipment damage and operational risks, and precisely controlling the raising distance of the sliding carbon plate after contact with the contact wire. This ensures that the pressure between the sliding carbon plate and the contact wire is not affected by carbon plate wear, maintaining constant contact pressure, significantly extending the carbon plate life, and reducing contact wire damage.

Description

Technical Field

[0001] This invention relates to the field of pantograph technology, and more particularly to a pantograph bracket with pressure detection function. Background Technology

[0002] The pantograph is a key device for electric locomotives and electric multiple units (such as high-speed trains, subways, and trams) to obtain electrical energy from the overhead contact line. It acts as a "bridge" between the train and the power grid. Its core task is to stably, reliably, and with low loss transmit the high-voltage electrical energy from the contact line to the train's electrical system under high-speed operation and various environmental conditions. The pantograph is driven by a lifting mechanism to unfold the previously folded upper and lower arms, achieving current connection with the contact line. The conductive carbon plate on the upper arm wears down with use, and current pantograph structures do not have this feature. The pressure detection function allows for greater pressure between the conductive carbon plate and the contact network in the initial, thicker stage. However, as the carbon plate thins out during subsequent use, the pressure becomes insufficient, affecting the actual use of the conductive carbon plate. Furthermore, current pantograph supports cannot visually determine the pantograph raising time, and the raising speed of the pantograph support affects mechanical equipment and train operation. Moreover, during train operation, the pantograph support may vibrate due to structural faults or high-speed train operation. If the vibration is not detected in time, it will pose a safety hazard. Based on these considerations, a pantograph support with pressure detection function is proposed. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the prior art by proposing a pantograph bracket with pressure detection function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pantograph support with pressure detection function includes a support body and an integrated control system. The support body includes a lower arm connected to a pantograph raising and lowering drive mechanism and an upper frame connected to a sliding carbon plate. Rotating test arms are installed on both sides of the upper frame connection end. A connecting end seat is fixedly provided at the end of the lower arm. A pressure testing turntable is provided at the end of the rotating test arm. Balance measuring shafts that are rotatably connected to the pressure testing turntable are provided on both sides of the connecting end seat. An arc-shaped pressure contact cavity is opened on the pressure testing turntable. A pressure contact piston disk is connected to the outer wall of the balance measuring shaft through a torsion connector. The pressure contact piston disk is located in the arc-shaped pressure contact cavity. When the upper frame and the lower arm rotate, the change in rotation angle can be detected.

[0006] The pantograph arm has a narrow-diameter measuring cavity that communicates with the arc-shaped pressure contact cavity. The narrow-diameter measuring cavity is equipped with an ultrasonic detection module and a capacitor liquid level detection module for measuring liquid level changes. The ultrasonic detection module and the capacitor liquid level detection module work together to detect the pantograph pressure and vibration conditions.

[0007] As a preferred embodiment, the pressure testing turntable has a connecting shaft opening adapted to the balance measuring shaft, and the inner wall of the connecting shaft opening has an arc-shaped sliding opening that communicates with the arc-shaped pressure contact cavity.

[0008] As a preferred embodiment, the torsion connector includes a connecting collar fixedly connected to the outer wall of the balance measuring shaft, and a torsion rod fixedly connected to the outer wall of the connecting collar within an arc-shaped sliding opening. The torsion rod is connected to the pressure contact piston disc by pushing the arc-shaped rod.

[0009] As a preferred embodiment, the ultrasonic detection module includes an ultrasonic sensor disposed at the top of the arc-shaped pressure contact cavity, and a test piston is slidably disposed in the narrow diameter measuring cavity. The ultrasonic sensor is used to measure the distance change of the test piston.

[0010] As a preferred embodiment, the capacitive liquid level detection module includes multiple capacitive sensors at different heights disposed on one side wall of the narrow-diameter measuring chamber, and the narrow-diameter measuring chamber is filled with a test liquid that can trigger the capacitive sensors.

[0011] As a preferred embodiment, the inner diameter of the arc-shaped pressure contact cavity is much larger than the inner diameter of the fine-diameter measuring cavity.

[0012] As a preferred embodiment, the integrated control system includes an energizing induction device for measuring the energization of the sliding carbon plate connecting cable and a bow raising and lowering drive mechanism, as well as an ultrasonic detection module and a capacitive liquid level detection module.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] This invention incorporates a pressure testing turntable and a balance measuring shaft at the rotating parts of the lower boom and upper frame. During the raising of the bow, the lower boom and upper frame gradually develop an angle, allowing for precise acquisition of the bow raising time during the raising phase. This enables accurate monitoring of the bow raising time and avoids equipment damage and operational risks.

[0015] When the sliding carbon plate comes into contact with the contact wire, the present invention connects the sensing circuit through the energizing induction device, thereby precisely controlling the lifting distance of the sliding carbon plate after contact with the contact wire, so as to ensure that the pressure between the sliding carbon plate and the contact wire is not affected by the wear of the carbon plate, maintain constant contact pressure, significantly extend the life of the carbon plate, and reduce the damage to the contact wire.

[0016] This invention can convert the minute vibrations of the pantograph into significant liquid level fluctuations during train operation. By combining ultrasonic and capacitive dual sensors for mutual verification, the vibration and floating of the pantograph can be monitored to prevent mechanical failures and grid disconnection accidents. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main assembly structure of a pantograph support with pressure detection function proposed in this invention;

[0018] Figure 2 This is a three-dimensional structural diagram of a pantograph support with pressure detection function proposed in this invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the arc-shaped pressure contact cavity and the narrow-diameter measuring cavity in a pantograph support with pressure detection function proposed in this invention;

[0020] Figure 4 This is a schematic diagram of the mounting structure on the lower arm of a pantograph support with pressure detection function proposed in this invention;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the pressure measuring turntable in a pantograph support with pressure detection function proposed in this invention;

[0022] Figure 6 This is a flowchart illustrating the adjustment of the pantograph lifting pressure in a pantograph support with pressure detection function, as proposed in this invention.

[0023] Figure 7 This is a flowchart of a vibration early warning and timing monitoring system for a pantograph support with pressure detection function proposed in this invention;

[0024] Figure 8 This is a framework diagram of an integrated control system for a pantograph support with pressure detection function proposed in this invention.

[0025] In the diagram: 1. Lower arm; 2. Upper frame; 3. Rotary measuring arm; 4. Connecting end seat; 5. Pressure measuring turntable; 6. Balance measuring shaft; 7. Arc-shaped pressure contact cavity; 8. Pressure contact piston plate; 9. Fine diameter measuring cavity; 10. Connecting shaft port; 11. Arc-shaped sliding port; 12. Connecting collar; 13. Torsion rod; 14. Pushing arc-shaped rod; 15. Ultrasonic sensor; 16. Test piston; 17. Capacitive sensor. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," 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 invention 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example, refer to Figures 1 to 8 A pantograph support with pressure detection function includes a support body and an integrated control system. The support body includes a lower arm 1 connected to a pantograph raising and lowering drive mechanism and an upper frame 2 connected to a sliding carbon plate. The above connection methods are all existing technologies and will not be described in detail here. Rotating test arms 3 are installed on both sides of the connecting end of the upper frame 2. A connecting end seat 4 is fixedly provided at the end of the lower arm 1. A pressure test turntable 5 is provided at the end of the rotating test arm 3.

[0030] The connecting end seat 4 is provided with a balance measuring shaft 6 on both sides, which is rotatably connected to the pressure measuring turntable 5. The pressure measuring turntable 5 is provided with an arc-shaped pressure contact cavity 7. The outer wall of the balance measuring shaft 6 is connected to the pressure contact piston disc 8 through a torsion connector. Furthermore, the pressure measuring turntable 5 is provided with a connecting shaft port 10 that is adapted to the balance measuring shaft 6. The inner wall of the connecting shaft port 10 is provided with an arc-shaped sliding port 11 that communicates with the arc-shaped pressure contact cavity 7. The setting of the arc-shaped sliding port 11 can ensure that the torsion rod 13 can rotate within the arc-shaped sliding port 11 when the balance measuring shaft 6 and the pressure measuring turntable 5 rotate.

[0031] Furthermore, the torsion connector includes a connecting collar 12 fixedly connected to the outer wall of the balance measuring shaft 6, and a torsion rod 13 fixedly connected to the outer wall of the connecting collar 12 within the arc-shaped sliding opening 11. The torsion rod 13 is connected to the pressure contact piston disc 8 by pushing the arc-shaped rod 14.

[0032] The pressure-contact piston disc 8 is located inside the arc-shaped pressure-contact cavity 7. When the upper frame 2 and the lower arm 1 rotate, it can acquire the change in rotation angle. The lifting and lowering drive mechanism will drive the lower arm 1 and the upper frame 2 to gradually rotate from a folded state to a "V" shaped angle state. During this process, the lower arm 1 and the upper frame 2 will rotate, and the balance measuring shaft 6 set in the pressure measuring turntable 5 will rotate with it. The torsion rod 13 connected to the balance measuring shaft 6 through the connecting collar 12 will rotate, driving the pushing arc-shaped rod 14 to move the pressure-contact piston disc 8 inside the arc-shaped pressure-contact cavity 7. The pressure-contact piston disc 8 will squeeze the liquid to be tested inside the arc-shaped pressure-contact cavity 7 into the narrow diameter measuring cavity 9, which will be effectively detected by the ultrasonic detection module and the capacitance liquid level detection module, thereby acquiring the change in rotation angle.

[0033] The following are the effects of pantograph raising too fast and too slow: Raising the pantograph too fast (<4 seconds) will cause impact damage. The pantograph head hits the contact wire at high speed, causing the pantograph to deform, the carbon strip to break, and even damage the contact wire. It will also cause overload of the suspension system. Excessive pantograph raising acceleration may damage the airbag / cylinder hinge or torsion spring mechanism. Raising the pantograph too slowly (>10 seconds) will cause arc erosion. During the pantograph raising process, the pantograph and the contact wire do not make sufficient contact, which can easily generate intermittent arcs and burn the surface of the pantograph and the contact wire.

[0034] The rotating support arm 3 has a narrow-diameter measuring cavity 9 that is connected to the arc-shaped pressure contact cavity 7. The inner diameter of the arc-shaped pressure contact cavity 7 is much larger than the inner diameter of the narrow-diameter measuring cavity 9. This allows the tested piston 16 to move a greater distance when the liquid in the arc-shaped pressure contact cavity 7 is transported into the narrow-diameter measuring cavity 9, thus amplifying the angle fluctuation and meeting the detection requirements of the ultrasonic detection module and the capacitance liquid level detection module, thereby improving the detection accuracy.

[0035] The narrow-diameter measuring cavity 9 is equipped with an ultrasonic detection module and a capacitive liquid level detection module for measuring liquid level changes. The ultrasonic detection module and the capacitive liquid level detection module work together to detect the pantograph pressure and vibration conditions. The ultrasonic detection module includes an ultrasonic sensor 15 set at the top of the arc-shaped pressure contact cavity 7. The piston under test 16 is slidably set in the narrow-diameter measuring cavity 9. The ultrasonic sensor 15 is used to measure the distance change of the piston under test 16.

[0036] The capacitive liquid level detection module includes multiple capacitive sensors 17 at different heights disposed on one side wall of the narrow diameter measuring chamber 9. The narrow diameter measuring chamber 9 is filled with the liquid to be measured that can trigger the capacitive sensors 17.

[0037] The integrated control system includes an energizing induction device for measuring the current in the sliding carbon plate connecting cable and a pantograph raising and lowering drive mechanism. The energizing induction device is used to measure the current in the cable, which is existing technology and will not be described in detail here. It also includes an ultrasonic detection module and a capacitance liquid level detection module, which interact and corroborate each other to achieve the effect of detecting changes in the liquid level in the narrow-diameter measuring cavity 9. This integrated sensor is integrated inside the pantograph, with minimal changes to the original overall structure of the pantograph. It adds the function of monitoring the pantograph-catenary contact force and vibration conditions during actual train operation. Furthermore, through structural design, the strength and rigidity of the sensor are guaranteed, realizing the integration of load-bearing and monitoring functions.

[0038] When the pantograph raising and lowering drive mechanism drives the sliding carbon plate to connect the circuit with the contact network, the pantograph raising and lowering drive mechanism will drive the lower arm 1 and the upper frame 2 to gradually rotate from a folded state to a "V" shaped angle state. During this process, the lower arm 1 and the upper frame 2 will rotate, and the balance measuring shaft 6 set in the pressure measuring turntable 5 will rotate with it. When rotating, the torsion rod 13 connected to the balance measuring shaft 6 through the connecting collar 12 will rotate, driving the push arc rod 14 to move the pressure contact piston plate 8 in the arc-shaped pressure contact cavity 7. The pressure contact piston plate 8 will squeeze the liquid being tested in the arc-shaped pressure contact cavity 7 into the narrow diameter measuring cavity 9. The liquid rises in the narrow diameter measuring cavity 9 and will cause it to contact the capacitive sensor 17. Thus, by the trigger time of the capacitive sensor 17 located at different heights, the time at different heights when the support is unfolded and the total time when the connection is made can be obtained, which is convenient for monitoring the pantograph's usage status.

[0039] The energizing induction device installed at the connecting cable of the sliding carbon plate will sense the current flow the moment the sliding carbon plate contacts the contact wire. At this time, the integrated control system will control the lifting and lowering drive mechanism to move slowly a predetermined distance. By controlling the distance of movement, the pressure between the sliding carbon plate and the contact wire can be controlled. Compared with the traditional fixed pressure, it can control the pressure when the sliding carbon plate contacts the contact wire. Even if the sliding carbon plate wears and thins, it can ensure that the pressure supplied to the sliding carbon plate and the contact wire is constant, thereby automatically realizing dynamic pressure compensation and effectively avoiding insufficient pressure and unstable pressure caused by wear of the sliding carbon plate.

[0040] During train operation, if the train travels too fast or the pantograph is damaged, the pantograph will vibrate. At this time, the vibrating pantograph will cause the lower arm 1 and the upper frame 2 located at the rotating position to rotate continuously. The rotational displacement generated by this rotation will squeeze the liquid being tested into the narrow-diameter measuring chamber 9 through the arc-shaped pressure contact chamber 7 to amplify the change. The constantly fluctuating liquid will cause the tested piston 16 to fluctuate up and down. At this time, the ultrasonic sensor 15 can measure the displacement change of the tested piston 16 and issue an alarm when the displacement distance reaches the threshold, thereby ensuring the safety of train operation.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pantograph support with pressure detection function, comprising a support body and an integrated control system, wherein the support body includes a lower arm (1) connected to a pantograph raising / lowering drive mechanism and an upper frame (2) connected to a sliding carbon plate, characterized in that, The upper frame (2) is equipped with rotating support arms (3) on both sides of the connecting end. The lower arm (1) is fixedly provided with a connecting end seat (4). The rotating support arm (3) is provided with a pressure measuring turntable (5). The connecting end seat (4) is provided with a balance measuring shaft (6) that is rotatably connected to the pressure measuring turntable (5). The pressure measuring turntable (5) is provided with an arc-shaped pressure contact cavity (7). The outer wall of the balance measuring shaft (6) is connected to a pressure contact piston disc (8) through a torsion connector. The pressure contact piston disc (8) is located in the arc-shaped pressure contact cavity (7). When the upper frame (2) and the lower arm (1) rotate, the change in rotation angle can be obtained. The measuring arm (3) has a narrow diameter measuring cavity (9) that is connected to the arc-shaped pressure contact cavity (7). The narrow diameter measuring cavity (9) is equipped with an ultrasonic detection module for measuring liquid level changes and a capacitor liquid level detection module. The ultrasonic detection module and the capacitor liquid level detection module work together to detect the pantograph pressure and vibration conditions. The ultrasonic detection module includes an ultrasonic sensor (15) disposed at the top of the arc-shaped pressure contact cavity (7), and a test piston (16) is slidably disposed in the narrow diameter measuring cavity (9). The ultrasonic sensor (15) is used to measure the distance change of the test piston (16). The capacitive liquid level detection module includes multiple capacitive sensors (17) at different heights disposed on one side wall of the narrow diameter measuring chamber (9), and the narrow diameter measuring chamber (9) is filled with the liquid to be tested that can trigger the capacitive sensors (17).

2. The pantograph support with pressure detection function according to claim 1, characterized in that, The pressure testing turntable (5) has a connecting shaft opening (10) adapted to the balance measuring shaft (6), and the inner wall of the connecting shaft opening (10) has an arc-shaped sliding opening (11) that communicates with the arc-shaped pressure contact cavity (7).

3. A pantograph support with pressure detection function according to claim 2, characterized in that, The torsion connector includes a connecting collar (12) fixedly connected to the outer wall of the balance measuring shaft (6), and a torsion rod (13) fixedly connected to the outer wall of the connecting collar (12) in the arc-shaped sliding port (11). The torsion rod (13) is connected to the pressure contact piston disc (8) by pushing the arc-shaped rod (14).

4. A pantograph support with pressure detection function according to claim 1, characterized in that, The inner diameter of the arc-shaped pressure contact cavity (7) is much larger than the inner diameter of the fine diameter measuring cavity (9).

5. A pantograph support with pressure detection function according to claim 1, characterized in that, The integrated control system includes an energizing induction device for measuring the energization of the sliding carbon plate connecting cable and a bow raising and lowering drive mechanism, as well as an ultrasonic detection module and a capacitive liquid level detection module.

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