Pantograph support with pressure detection function

Abstract

The invention discloses a pantograph support with a pressure detection function, and belongs to the technical field of pantographs, the pantograph support comprises a support main body and an integrated control system, the end part of a lower arm rod is fixedly provided with a connecting end seat, the end part of a rotating measurement support arm is provided with a pressure measurement turntable, and the two sides of the connecting end seat are provided with balance measurement shafts rotationally connected with the pressure measurement turntable; the outer side wall of the balance measuring shaft is connected with a pressure contact piston disc through a torsion connecting piece. By arranging the pressure measuring turntable and the balance measuring shaft at the rotating part of the lower arm rod and the upper frame, the lower arm rod and the upper frame can gradually generate an angle during pantograph rising, and the pantograph rising time can be accurately obtained in the pantograph rising stage, so that the purposes of accurately monitoring the pantograph rising time and avoiding equipment damage and operation risks are achieved; the pantograph rising distance of the sliding carbon plate after contact of the contact net is accurately controlled, so that the pressure between the sliding carbon plate and the contact net is not affected by abrasion of the carbon plate, the contact pressure is kept constant, the service life of the carbon plate is remarkably prolonged, and damage to the contact net is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pantographs, and in particular to a pantograph bracket with a pressure detection function. Background Art

[0002] The pantograph is a key device for electric locomotives and electric multiple units (such as high-speed railways, subways, trams, etc.) to obtain electricity from the overhead contact network. It is equivalent to a "bridge" between the train and the power grid. Its core task is to stably, reliably and with low loss transmit the high-voltage electric energy on the contact network to the train's electrical system under high-speed train operation and various environmental conditions. The pantograph is driven by a pantograph lifting device to unfold the upper and lower arms that were originally folded together to achieve current connection with the contact network. The conductive carbon plate set on the upper arm will be continuously worn with use, and the current pantograph structure does not have this function. The pressure detection function causes the conductive carbon plate to have a greater pressure against the contact network when it is thicker in the initial stage. After subsequent use, the carbon plate becomes thinner and the pressure is insufficient, affecting the actual use of the conductive carbon plate. In addition, the current pantograph bracket cannot intuitively determine the pantograph raising time when raising the pantograph, and the speed of the pantograph bracket raising the pantograph will affect the mechanical equipment and train operation. Furthermore, the pantograph bracket will vibrate due to structural failure and high-speed operation of the train during the train running. If the vibration cannot be detected in time, there will be a safety hazard. Based on this, a pantograph bracket with a pressure detection function is proposed. Summary of the Invention

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

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A pantograph support with a pressure detection function comprises a support body and an integrated control system, wherein the support body comprises a lower arm connected to a pantograph raising and lowering driving mechanism and an upper frame connected to a sliding carbon plate, rotational measurement arms are installed on both sides of the connection end of the upper frame, a connection end seat is fixedly provided at the end of the lower arm, a pressure measurement turntable is provided at the end of the rotational measurement arm, a balancing measurement shaft rotatably connected to the pressure measurement turntable is provided on both sides of the connection end seat, an arc-shaped pressure contact cavity is opened on the pressure measurement turntable, an outer wall of the balancing measurement shaft is connected to a pressure contact piston disc via a torsion connection piece, and the pressure contact piston disc is located in the arc-shaped pressure contact cavity, and when the upper frame and the lower arm rotate, a change in the rotation angle can be obtained; A thin-diameter measuring cavity connected to the arc-shaped pressure contact cavity is provided in the rotating measuring arm. An ultrasonic detection module and a capacitive liquid level detection module for measuring liquid level changes are provided in the thin-diameter measuring cavity. The ultrasonic detection module and the capacitive liquid level detection module work together to realize the detection of the pantograph pressure and vibration conditions.

[0005] As a preferred solution, a connecting shaft opening adapted to the balance measuring shaft is provided in the pressure measuring turntable, and an arc-shaped sliding opening communicating with the arc-shaped pressure contact cavity is provided on the inner wall of the connecting shaft opening.

[0006] As a preferred solution, the torsional connector includes a connecting ring fixedly connected to the outer wall of the balance measuring shaft, and the outer wall of the connecting ring is fixedly connected to a torsion rod in the arc-shaped sliding opening, and the torsion rod is connected to the pressure-touch piston disk by pushing the arc-shaped rod.

[0007] As a preferred solution, the ultrasonic detection module includes an ultrasonic sensor arranged at the top of the arc-shaped pressure contact cavity, a tested piston is slidably arranged in the thin-diameter measurement cavity, and the ultrasonic sensor is used to measure the distance change of the tested piston.

[0008] As a preferred solution, the capacitive liquid level detection module includes a plurality of capacitive sensors of different heights arranged on a side wall of a thin diameter measuring cavity, and the thin diameter measuring cavity is filled with a measured liquid that can trigger the capacitive sensors.

[0009] As a preferred solution, the inner diameter of the arc-shaped pressure contact cavity is much larger than the inner diameter of the thin-diameter measurement cavity.

[0010] As a preferred solution, the integrated control system includes an energized sensing device for measuring the sliding carbon plate connecting cable and a bow raising and lowering driving mechanism, as well as an ultrasonic detection module and a capacitive liquid level detection module.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a pressure measurement turntable and a balance measurement shaft at the rotating parts of the lower arm and the upper frame. When the bow is raised, the lower arm and the upper frame gradually form an angle, which can accurately obtain the bow raising time during the bow raising stage, thereby achieving accurate monitoring of the bow raising time and avoiding equipment damage and operation risks. When the sliding carbon plate contacts the contact network, the present invention connects the induction circuit by energizing the induction device, thereby accurately controlling the lifting distance of the sliding carbon plate after contacting the contact network, thereby ensuring that the pressure between the sliding carbon plate and the contact network is not affected by the wear of the carbon plate, maintaining a constant contact pressure, significantly extending the life of the carbon plate, and reducing damage to the contact network; The present invention can convert the tiny vibrations of the pantograph into significant liquid level fluctuations during the train operation phase, and combine the ultrasonic sensor and the capacitive dual sensor for mutual verification to monitor the vibration fluctuations of the pantograph to prevent mechanical failures and grid disconnection accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main assembly structure of a pantograph support with a pressure detection function proposed by the present invention; Figure 2This is a schematic diagram of the three-dimensional structure of a pantograph support with a pressure detection function proposed by the present invention; Figure 3 This is a schematic diagram of the internal structure of an arc-shaped pressure contact cavity and a thin-diameter measurement cavity in a pantograph support with a pressure detection function proposed by the present invention; Figure 4 This is a schematic diagram of the installation structure on the lower arm of a pantograph support with a pressure detection function proposed by the present invention; Figure 5 This is a schematic cross-sectional view of a pressure measuring turntable in a pantograph support with a pressure detection function proposed by the present invention; Figure 6 This is a flow chart of the pantograph pressure adjustment in a pantograph support with pressure detection function proposed by the present invention; Figure 7 This is a flow chart of vibration warning and timing monitoring of a pantograph support with pressure detection function proposed by the present invention; Figure 8 This is a framework diagram of the integrated control system in a pantograph support with pressure detection function proposed by the present invention.

[0013] In the figure: 1. Lower arm; 2. Upper frame; 3. Rotating measuring arm; 4. Connecting end seat; 5. Pressure measuring turntable; 6. Balance measuring shaft; 7. Arc-shaped pressure contact cavity; 8. Pressure contact piston disk; 9. Small diameter measuring cavity; 10. Connecting shaft opening; 11. Arc-shaped sliding opening; 12. Connecting collar; 13. Torsion rod; 14. Pushing arc rod; 15. Ultrasonic sensor; 16. Measured piston; 17. Capacitive sensor. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean 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, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0017] Example, see Figures 1 to 8 A pantograph support with a 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 prior art and will not be described in detail here. Rotational detection arms 3 are installed on both sides of the connection end of the upper frame 2. A connection end seat 4 is fixedly provided at the end of the lower arm 1. A pressure detection turntable 5 is provided at the end of the rotational detection arm 3. Balance measuring shafts 6 rotatably connected to the pressure measuring turntable 5 are provided on both sides of the connecting end seat 4. An arc-shaped pressure contact cavity 7 is provided on the pressure measuring turntable 5. The outer wall of the balance measuring shaft 6 is connected to the pressure contact piston disk 8 through a torsional connection. Furthermore, a connecting shaft opening 10 adapted to the balance measuring shaft 6 is provided in the pressure measuring turntable 5, and an arc-shaped sliding opening 11 connected to the arc-shaped pressure contact cavity 7 is provided on the inner wall of the connecting shaft opening 10; the setting of the arc-shaped sliding opening 11 can ensure that the torsion rod 13 can rotate in the arc-shaped sliding opening 11 when the balance measuring shaft 6 and the pressure measuring turntable 5 rotate.

[0018] Furthermore, the torsional connector includes a connecting ring 12 fixedly connected to the outer wall of the balancing measuring shaft 6, and the outer wall of the connecting ring 12 is fixedly connected to a torsion rod 13 in the arc-shaped sliding opening 11, and the torsion rod 13 is connected to the pressure-touch piston disk 8 by pushing the arc-shaped rod 14.

[0019] The pressure-touch piston disc 8 is located in the arc-shaped pressure-touch cavity 7. When the upper frame 2 and the lower arm 1 rotate, the change in the rotation angle can be obtained. The bow raising and lowering driving 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, rotation will occur between the lower arm 1 and the upper frame 2, 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 ring 12 will rotate, driving the arc-shaped rod 14 to drive the pressure-touch piston disc 8 in the arc-shaped pressure-touch cavity 7 to move. The pressure-touch piston disc 8 will squeeze the measured liquid in the arc-shaped pressure-touch cavity 7 into the thin-diameter measuring cavity 9, and effectively detect it through the ultrasonic detection module and the capacitive liquid level detection module, so as to obtain the change in the rotation angle.

[0020] The following are the effects of raising the pantograph too quickly or too slowly: raising the pantograph too quickly (<4 seconds) will cause impact damage, with the pantograph head hitting the contact network at high speed, causing the slide plate to deform, the carbon bars to break, and even damage to the contact network wires. It will also cause the suspension system to overload, and excessive acceleration during pantograph raising may damage the airbag / cylinder hinge or torsion spring mechanism. Raising the pantograph too slowly (>10 seconds) will cause arc erosion, as the slide plate and the contact network are not in full contact during the raising process, which can easily generate intermittent arcs and erode the slide plate and the surface of the contact wire.

[0021] A thin-diameter measuring cavity 9 connected to the arc-shaped pressure contact cavity 7 is provided in the rotating measuring arm 3. The inner diameter of the arc-shaped pressure contact cavity 7 is much larger than the inner diameter of the thin-diameter measuring cavity 9. Therefore, when the liquid in the arc-shaped pressure contact cavity 7 is transported to the thin-diameter measuring cavity 9, the measured piston 16 will move a greater distance, thereby achieving the effect of amplifying the angle fluctuation, meeting the detection requirements of the ultrasonic detection module and the capacitive liquid level detection module, and improving the detection accuracy.

[0022] An ultrasonic detection module and a capacitive liquid level detection module for measuring liquid level changes are provided in the fine-diameter measuring cavity 9. The ultrasonic detection module and the capacitive liquid level detection module work together to detect the pressure and vibration conditions of the pantograph. The ultrasonic detection module includes an ultrasonic sensor 15 arranged at the top of the arc-shaped pressure contact cavity 7. A measured piston 16 is slidingly provided in the fine-diameter measuring cavity 9. The ultrasonic sensor 15 is used to measure the distance change of the measured piston 16.

[0023] The capacitive liquid level detection module includes a plurality of capacitive sensors 17 of different heights arranged on a side wall of the thin-diameter measuring cavity 9 . The thin-diameter measuring cavity 9 is filled with a liquid to be tested that can trigger the capacitive sensors 17 .

[0024] The integrated control system includes an energized sensing device for measuring the sliding carbon plate connecting cable and a pantograph raising and lowering driving mechanism. The energized sensing device is used to measure the current in the cable. It is an existing technology and will not be described in detail here. It also includes an ultrasonic detection module and a capacitive liquid level detection module, which interact and verify each other to achieve the effect of detecting the liquid level changes in the thin-diameter measuring cavity 9. The integrated sensor is integrated inside the pantograph, with little change to the overall structure of the original pantograph, and adds the function of monitoring the pantograph-net contact force and vibration conditions during the actual operation of the train. The structural design ensures the strength and stiffness of the sensor, and realizes the integration of the structural functions of load bearing and monitoring.

[0025] When the bow raising and lowering driving mechanism of the present invention drives the sliding carbon plate to connect the circuit with the contact network, the bow raising and lowering driving mechanism will drive the lower arm 1 and the upper frame 2 to gradually rotate from the folded state to the "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. During the rotation, the torsion rod 13 connected to the balance measuring shaft 6 through the connecting ring 12 will rotate, driving the arc rod 14 to drive the pressure contact piston disk 8 in the arc pressure contact cavity 7 to move. The pressure contact piston disk 8 will squeeze the measured liquid in the arc pressure contact cavity 7 into the small diameter measuring cavity 9. The liquid will rise in the small diameter measuring cavity 9 and drive it to contact the capacitance sensor 17. Therefore, the time at different heights and the total time of connection when the bracket is unfolded can be obtained through the triggering time of the capacitance sensor 17 at different heights, thereby facilitating the monitoring of the use status of the pantograph. The energized sensing device installed at the connection cable of the sliding carbon plate will sense the flow of current at the moment the sliding carbon plate contacts the contact network. At this time, the bow raising and lowering driving mechanism is controlled by the integrated control system to slowly move a predetermined distance. By controlling the moving distance, the effect of controlling the pressure between the sliding carbon plate and the contact network is achieved. Compared with the traditional fixed pressure, the pressure can be controlled when the sliding carbon plate contacts the contact network. Therefore, even if the sliding carbon plate is worn and thinned, the pressure applied to the sliding carbon plate and the contact network can be guaranteed to be constant, thereby automatically realizing dynamic pressure compensation, thereby effectively avoiding the occurrence of insufficient pressure and unstable pressure caused by wear of the sliding carbon plate. During the operation of the train, when the train runs too fast or the pantograph is damaged, the pantograph will shake. At this time, the shaking pantograph will cause the lower arm 1 and the upper frame 2 at the rotating position to rotate continuously. At this time, the rotational displacement generated by the rotation will squeeze the tested liquid into the fine-diameter measuring cavity 9 through the arc-shaped pressure contact cavity 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 the train operation.

[0026] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pantograph support with a pressure detection function, comprising a support body and an integrated control system, wherein the support body comprises a lower arm (1) connected to a pantograph raising and lowering driving mechanism and an upper frame (2) connected to a sliding carbon plate, characterized in that: The upper frame (2) is provided with a rotating measuring support arm (3) on both sides of the connecting end, the lower arm (1) is fixedly provided with a connecting end seat (4), the end of the rotating measuring support arm (3) is provided with a pressure measuring turntable (5), the connecting end seat (4) is provided with a balancing measuring shaft (6) rotatably connected to the pressure measuring turntable (5) on both sides, the pressure measuring turntable (5) is provided with an arc-shaped pressure contact cavity (7), the outer wall of the balancing measuring shaft (6) is connected to a pressure contact piston disc (8) through a torsion connection, and the pressure contact piston disc (8) is located in the arc-shaped pressure contact cavity (7), and when the upper frame (2) and the lower arm (1) rotate, the change of the rotation angle can be obtained; A thin-diameter measuring cavity (9) communicating with the arc-shaped pressure contact cavity (7) is provided in the rotating measuring support arm (3). An ultrasonic detection module and a capacitive liquid level detection module for measuring liquid level changes are provided in the thin-diameter measuring cavity (9). The ultrasonic detection module and the capacitive liquid level detection module work together to detect the pressure and vibration conditions of the pantograph.

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

3. The pantograph support with pressure detection function according to claim 2, characterized in that: The torsion connecting member comprises a connecting collar (12) fixedly connected to the outer side wall of the balance measuring shaft (6); the outer side wall of the connecting collar (12) is fixedly connected to a torsion rod (13) located in the arc-shaped sliding opening (11); the torsion rod (13) is connected to the pressure-touch piston disc (8) by pushing the arc-shaped rod (14).

4. The pantograph support with pressure detection function according to claim 1, characterized in that: The ultrasonic detection module comprises an ultrasonic sensor (15) arranged at the top of the arc-shaped pressure contact cavity (7), a tested piston (16) is slidably arranged in the thin-diameter measurement cavity (9), and the ultrasonic sensor (15) is used to measure the distance change of the tested piston (16).

5. The pantograph support with pressure detection function according to claim 1, characterized in that: The capacitive liquid level detection module comprises a plurality of capacitive sensors (17) of different heights arranged on a side wall of a thin-diameter measuring cavity (9), and the thin-diameter measuring cavity (9) is filled with a measured liquid that can trigger the capacitive sensors (17).

6. The 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 thin-diameter measurement cavity (9).

7. The pantograph support with pressure detection function according to claim 1, characterized in that: The integrated control system includes an energized sensing device for measuring the sliding carbon plate connecting cable and a bow raising and lowering driving mechanism, and also includes an ultrasonic detection module and a capacitive liquid level detection module.

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