Pantograph lifting detection device

Abstract

The invention relates to the field of rail train inspection, in particular to a pantograph lifting detection device which comprises a wire spool, a pull box, a pull rope, an encoder, an electromagnetic clutch, a driving motor and a torque sensor. One end of the pull rope is wound on the wire spool, and the other end of the pull rope extends out of the pull box to be connected with a pantograph; the encoder and the electromagnetic clutch are connected to the two ends of the wire spool respectively. The driving motor is mounted on the pull box; the driving motor is in transmission connection with the electromagnetic clutch through the torque sensor. According to the invention, two-in-one detection of pantograph rising time and pressure re-checking is realized, pantograph rising time detection and pressure re-checking are completed by means of the structure of the device, and no manual operation is involved, so that the inconsistency caused by manual operation is avoided, the labor intensity is reduced, and the detection efficiency is improved. Detection can be carried out completely according to the number requirement in the collection time and the collection speed, it is guaranteed that detection can be carried out according to the same parameters every time, and the detection precision is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of rail train inspection, and in particular to a pantograph lifting and lowering detection device. Background Art

[0002] At present, the pantograph raising time collection and pantograph pressure verification in the railway field are mainly tested manually. The pantograph raising time collection is carried out by the detection personnel through telephone conversations, which are respectively the pantograph starter and the pantograph raising time recorder, recording the time from the pantograph raising start to the pantograph contacting the grounding grid. There are errors in the pantograph raising time record due to personnel operation factors, and personnel operation is inconvenient. According to the requirements, the pantograph pressure verification needs to detect the average pressure of the pantograph's descending stroke. At present, it is mainly manual operation using a spring scale to detect the descending stroke pressure, and the manual labor intensity is high. The collection speed and angle of the spring scale have a great influence on the pressure collection accuracy. The collection position, detection angle, and stretching speed are all factors that cause inaccurate pressure verification, so the manual operation method has a great influence on the pressure collection error. Summary of the invention

[0003] In view of this, the present invention provides a pantograph lifting and lowering detection device, which aims to complete the collection of the pantograph raising time and lowering pressure conditions by relying on the device itself, so as to avoid errors caused by manual operation.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A pantograph lifting and lowering detection device comprises a winding drum, a wire box, a pull rope, an encoder, an electromagnetic clutch, a drive motor and a torque sensor; the winding drum is rotatably arranged in the wire box; one end of the pull rope is wound on the winding drum, and the other end extends to the outside of the wire box for connection with the pantograph; the encoder is connected to one end of the winding drum, and the electromagnetic clutch is connected to the other end of the winding drum; the drive motor is installed on the wire box; the drive motor is transmission-connected to the electromagnetic clutch through the torque sensor.

[0006] In some optional embodiments, an angle correction mechanism is also included; the angle correction mechanism includes a limit frame, a translation plate, a guide cylinder, a joint bearing and an inclination sensor; the limit frame is connected to the wire pull box; the translation plate is arranged between the limit frame and the wire pull box and can slide freely in the horizontal direction; the upper end of the guide cylinder is connected to the translation plate through the joint bearing; the inclination sensor is installed on the guide cylinder; the pull rope passes through the limit frame, the translation plate and the guide cylinder.

[0007] In some optional embodiments, the angle correction mechanism also includes a sliding limit mechanism; a plurality of sliding limit mechanisms are respectively installed on the limit frame and the pull box; the sliding limit mechanism includes a pillar and a sliding body; the sliding body is rotatably engaged with one end of the pillar and abuts against the translation plate, and the other end of the pillar is connected to the limit frame / the pull box.

[0008] In some optional embodiments, the top of the wire pull box has a support plate extending toward one side; and the angle correction mechanism is installed on the support plate.

[0009] In some optional embodiments, a steering pulley is further included; the steering pulley is rotatably connected to the wire pulling box and is located below the guide cylinder; the pull rope wound on the winding drum passes through the steering pulley and enters into the guide cylinder.

[0010] In some optional embodiments, it also includes a wire outlet drum; the wire outlet drum is installed on the wire pull box and is located between the winding drum and the steering pulley; the length direction of the wire outlet drum is tangent to the circumference of the winding drum and the steering pulley; the pull rope wound on the winding drum passes through the wire outlet drum and then passes through the steering pulley and enters the guide cylinder.

[0011] In some optional embodiments, the angle correction mechanism further includes an anti-wear cylinder; the anti-wear cylinder is detachably disposed in the guide cylinder; the pull rope passes through the anti-wear cylinder, and the top of the anti-wear cylinder has a chamfer at a position for the pull rope to pass through.

[0012] In some optional embodiments, it also includes a first transmission gear, a second transmission gear, a third transmission gear and a fourth transmission gear; the first transmission gear is transmission-connected to the drive motor; the second transmission gear and the third transmission gear are respectively connected to the two ends of the torque sensor, and the second transmission gear is meshed with the first transmission gear; the fourth transmission gear is connected to the electromagnetic clutch, and the fourth transmission gear is meshed with the third transmission gear.

[0013] In some optional embodiments, the pull rope is wound on the winding drum in the form of a single-layer coil.

[0014] In some optional implementations, a computer system is further included; the encoder, electromagnetic clutch, drive motor and torque sensor are all electrically connected to the computer system.

[0015] In summary, compared with the prior art, the present invention has the following advantages and beneficial effects: the present invention realizes the two-in-one detection of pantograph raising time and pressure verification, and the pantograph raising time detection and pressure verification are completed by relying on the device's own structure without human intervention, thereby avoiding the inconsistency caused by manual operation and reducing labor intensity, and the collection time and speed can be detected in full accordance with the document number requirements, ensuring that the same parameters can be used for detection each time, greatly improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 for Figure 1 The schematic diagram of the structure after omitting the external structure such as the box, Figure 2 Mainly shows the internal structure of the present invention.

[0018] Figure 3 for Figure 2 Schematic diagram of the reverse direction structure.

[0019] Figure 4 for Figure 2 Schematic diagram of the structure after omitting the fixing frame and the pull ring.

[0020] Figure 5 for Figure 4 A schematic diagram of the structure after omitting the drive motor, the first transmission gear, the second transmission gear, the torque sensor and the third transmission gear.

[0021] Figure 6 for Figure 5 A schematic diagram of the front view of the structure shown.

[0022] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along the AA direction.

[0023] Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure along the BB direction.

[0024] Fig. 9 for Figure 5 Schematic diagram of the reverse direction structure.

[0025] Fig.10 The structures of the limiting frame 23, the translation plate 24 and the pull ring 21 are mainly shown in an exploded view.

[0026] Fig.11 It is a structural schematic diagram of the sliding limiting mechanism in the present invention.

[0027] The meanings of the numbers in the figure are: box 11, handle 12, computer system 13, operation button 14, power supply and communication interface 15, draw box 20, pull ring 21, pull rope 22, limit frame 23, translation plate 24, sliding limit mechanism 25, pillar 251, sliding body 252, joint bearing 26, guide cylinder 27, anti-wear cylinder 28, inclination sensor 29, steering pulley 210, outlet reel 211, winding reel 212, encoder 213, fixed frame 30, drive motor 31, first transmission gear 32, second transmission gear 33, torque sensor 34, third transmission gear 35, fourth transmission gear 36, electromagnetic clutch 37. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there are any descriptions of "first", "second" and the like, they are only used for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] like Figure 1-Figure 8 As shown, a pantograph lifting detection device described in an embodiment of the present application mainly includes a box 11 and a winding drum 212, a cable box 20, a cable 22, an encoder 213, an electromagnetic clutch 37, a drive motor 31 and a torque sensor 34 arranged in the box 11. For the convenience of description, the spatial rectangular coordinate system shown in the accompanying drawings is introduced to explain the relevant structure of the embodiment of the present application, wherein the direction shown by the X-axis is the right, the direction shown by the Y-axis is the rear, and the direction shown by the Z-axis is the top.

[0033] like Figure 7 and Figure 8As shown, the wire winding drum 212 is disposed in the wire pulling box 20 and can rotate freely around the X-axis in the wire pulling box 20.

[0034] like Figure 8 As shown, one end of the pull rope 22 is wound on the winding drum 212, and the other end extends out of the pull rope box 20 for connection with the pantograph.

[0035] like Figure 7 As shown, the encoder 213 is connected to the left end of the winding disk 212, and the electromagnetic clutch 37 is connected to the right end of the winding disk 212.

[0036] like Figure 2-Figure 4 As shown, an additional fixing bracket 30 may be installed on the wire drawing box 20 , and the driving motor 31 is installed on the fixing bracket 30 , so as to realize the installation of the driving motor 31 on the wire drawing box 20 .

[0037] like Figure 4 As shown, the torque sensor 34 is transmission-connected between the drive motor 31 and the electromagnetic clutch 37 , and the torque sensor 34 is mainly used to detect the torsional moment between the drive motor 31 and the electromagnetic clutch 37 .

[0038] The use process of the device described in the embodiment of the present application is as follows:

[0039] When the pantograph raising time detection is to be performed, the electromagnetic clutch 37 is disconnected, the drive motor 31 and the torque sensor 34 are not working, and the device is in a passive detection state. When the detection starts, the device is placed under the pantograph and fixed (for example, fixed on the roof), and the end of the pull rope 22 is connected to the pantograph support rod through a mechanism such as a hook and a pull ring 21 and tightened. When the train driver operates the pantograph to lift upward, the pull rope 22 on the winding drum 212 in the pull box 20 begins to be pulled out, and at the same time, the pull rope 22 drives the winding drum 212 to rotate. Since the encoder 213 is connected to one end of the winding drum 212, the rotation angle, number of rotations, and rotation time of the winding drum 212 can be reflected by the pulse change value of the encoder 213. The rotation angle and number of rotations of the winding drum 212 can correspond to the length of the pull rope 22 pulled out. Each rotation of the winding drum 212 is equivalent to the pull rope 22 pulling out a length as long as the circumference of the winding drum 212. Therefore, the distance and time of the pantograph lifting upward can finally be obtained by calculating the pulse change value of the encoder 213.

[0040] After the pantograph is raised to the right position, a certain pressure will be maintained between the pantograph and the grounding grid. We need to detect whether this pressure value meets the requirements, which is the pressure review. When the pressure review of the pantograph is to be carried out, the electromagnetic clutch 37 is energized, the drive motor 31 and the torque sensor 34 are also in the energized state, and the device is in the active detection state. At the beginning of the detection, the device is still placed under the pantograph and fixed, and the end of the pull rope 22 is still connected to the pantograph support rod through mechanisms such as hooks and pull rings 21 and tightened. At this time, the train driver is no longer required to operate the pantograph to descend. The drive motor 31 starts to rotate and drives the electromagnetic clutch 37 to rotate. Since the electromagnetic clutch 37 is connected to the winding drum 212, the drive motor 31 can eventually transmit power to the winding drum 212 and drive the winding drum 212 to rotate. When the winding drum 212 rotates, the pantograph will be pulled down through the pull rope 22. During the bow pulling process, the torque sensor 34 outputs the torque value in the process, and the tension value of the pantograph is obtained by converting the torque and the lever arm. This tension value and the pressure maintained between the pantograph and the grounding grid after the pantograph is raised into place are the relationship between action and reaction. Therefore, measuring this tension value is equivalent to obtaining the pressure value between the pantograph and the grounding grid after the pantograph is raised into place.

[0041] The device described in the embodiment of the present application realizes a two-in-one detection of the pantograph raising time and the pressure verification. The pantograph raising time detection and the pressure verification are completed by relying on the device's own structure without human intervention, thereby avoiding the inconsistency caused by manual operation and reducing labor intensity. The collection time and speed can be detected in full accordance with the document number requirements, ensuring that the same parameters can be used for detection each time, greatly improving the detection accuracy.

[0042] In addition, in order to ensure that the pull rope 22 is pulled out to a fixed length each time the winding drum 212 rotates one circle, as a preferred embodiment, the pull rope 22 is wound on the winding drum 212 in a single-layer coil, that is, the pull rope 22 is wound on the winding drum 212 at most one layer, because the length wound when the second layer is wound is not the same as the length of the first layer, and the turns of the pull rope 22 wound on the winding drum 212 are closely aligned with each other without crossing or stacking. In this way, it can be ensured that when the pull rope 22 is pulled out to the same length, the winding drum 212 rotates at the same angle, so as to facilitate the conversion of time.

[0043] Since the device is fixed in position during detection, when the pantograph is raised or pulled, the pull rope 22 between the pantograph and the draw box 20 may deviate from the vertical state and become tilted due to the connection position of the pull rope 22 on the pantograph and the different lifting and lowering trajectories of different pantographs. When the pull rope 22 is not in the vertical state, it cannot accurately reflect the tension value, which will affect the detection accuracy. In order to avoid this situation as much as possible, Figure 8-Figure 10As shown, the device described in the embodiment of the present application further includes an angle correction mechanism. The angle correction mechanism includes a limit frame 23, a translation plate 24, a guide cylinder 27, a joint bearing 26 and an inclination sensor 29.

[0044] The limit frame 23 is installed on the wire pulling box 20, for example, installed on the top of the wire pulling box 20. The limit frame 23 can be connected to the wire pulling box 20 through the four corner columns combined with bolts, so that there is a gap between the limit frame 23 and the surface of the wire pulling box 20 to accommodate the translation plate 24 to slide therein, and the four corner columns can prevent the translation plate 24 from sliding out. The middle part of the limit frame 23 has a through hole for the pull rope 22 to pass through.

[0045] The translation plate 24 is horizontally disposed between the limit frame 23 and the wire drawing box 20 and can slide freely in the horizontal direction.

[0046] The guide cylinder 27 is generally arranged vertically, and the upper end of the guide cylinder 27 may be rotatably connected to the translation plate 24 via a joint bearing 26, so that the guide cylinder 27 can swing with its upper end as the center.

[0047] The inclination sensor 29 is installed on the guide cylinder 27 , and is used to detect the swing inclination of the guide cylinder 27 .

[0048] The pull rope 22 coming out of the pull box 20 passes through the guide cylinder 27, the translation plate 24 and the limit frame 23, and then is connected to the pantograph.

[0049] After the pull rope 22 between the pantograph and the cable box 20 deviates from the vertical state, its component force in the vertical direction is the pantograph tension value that needs to be detected during the lowering process. The function of the angle correction mechanism is to obtain the angle at which the pull rope 22 deviates from the vertical state, so as to facilitate the calculation of its component force in the vertical direction.

[0050] The angle correction mechanism achieves the above purpose in the following way: when the pull rope 22 deviates from the vertical state, assuming that the pull rope 22 is deflected to the left from top to bottom, on the one hand, the component force of the pull rope 22 between the pantograph and the pull box 20 in the horizontal direction will drive the translation plate 24 to slide to the left, and on the other hand, the component force of the pull rope 22 between the pantograph and the pull box 20 in the horizontal direction will also drive the lower part of the guide cylinder 27 to swing to the left with the joint bearing 26 as the center, so that the guide cylinder 27 and the pull rope 22 are parallel to each other, so that the pull rope 22 between the pantograph and the pull box 20 is finally in a straight line and deflected to the left from top to bottom. At this time, the tension value transmitted to the winding drum 212 by the pull rope 22 and finally measured by the torque sensor 34 is not the tension value when the pantograph is pulled to be detected.

[0051] The inclination sensor 29 can reflect the swing angle of the guide cylinder 27, that is, it can reflect the angle at which the pull rope 22 between the pantograph and the pull box 20 deviates from the vertical direction. The tension value measured by the torque sensor 34 is combined with the angle measured by the inclination sensor 29 to convert the vertical component of the force, so as to accurately obtain the tension value of the pantograph to be tested when the bow is pulled.

[0052] In order to enable the translation plate 24 to slide smoothly between the limit frame 23 and the wire draw box 20, as an optional implementation, Figure 8 and Fig.10 As shown, the angle correction mechanism may further include a sliding limit mechanism 25. A plurality of sliding limit mechanisms 25 are respectively installed on the limit frame 23 and the wire pulling box 20. Fig.11 As shown, the sliding limit mechanism 25 includes a support 251 and a sliding body 252. The sliding body 252 is rotatably connected to one end of the support 251, that is, the sliding body 252 can roll freely in one end of the support 251, and at the same time, the sliding body 252 also abuts against the translation plate 24, and the sliding body 252 can be, for example, a ball. The other end of the support 251 is connected to the corresponding limit frame 23 / pull box 20. In this way, the top surface of the translation plate 24 is supported and limited by the sliding limit mechanism 25 installed on the limit frame 23, and the bottom surface of the translation plate 24 is supported and limited by the sliding limit mechanism 25 installed on the pull box 20, that is, the upper and lower parts of the translation plate 24 are both supported by the sliding limit mechanism 25, so it can only slide freely in the horizontal direction. The translation plate 24 and the sliding body 252 in the sliding limit mechanism 25 are in point contact, and the friction force is small, so it can slide smoothly.

[0053] The entire angle correction mechanism can be installed on the top of the cable box 20, so that it is located directly above the cable reel 212. However, this will make the height of the entire device higher. Considering that the device described in the embodiment of the present application needs to be placed under the pantograph during detection, the height of the device should not be too high. Therefore, as an optional implementation, if Figure 8 As shown, it is conceivable to extend the top of the wire draw box 20 toward one side to form a support plate, and then install the entire angle correction mechanism on the support plate. In this way, part of the angle correction mechanism, such as the lower half of the guide cylinder 27, can be located on one side of the wire draw box 20, and the height of the entire device can be effectively controlled.

[0054] Since the support plate is located diagonally above the winding drum 212, the angle deflection of the pull rope 22 may be relatively large when it passes through the angle correction mechanism on the support plate and then enters the pull box 20, and the guide cylinder 27 in the angle correction mechanism may not be able to produce such a large deflection. Therefore, a steering pulley 210 can be installed on the pull box 20. The steering pulley 210 is located below the guide cylinder 27, and it is best to set the position of the steering pulley 210 within the swingable range of the guide cylinder 27 so that the length direction of the guide cylinder 27 is tangent to the circumference of the steering pulley 210, so that the pull rope 22 can smoothly transition from the guide cylinder 27 to the steering pulley 210.

[0055] In order to make the pull rope 22 smoothly transition from the diverting pulley 210 to the guide cylinder 27, a wire outlet drum 211 may be provided between the winding drum 212 and the diverting pulley 210. The wire outlet drum 211 is installed on the wire pulling box 20, and the length direction of the wire outlet drum 211 is tangent to the circumference of the winding drum 212 and the diverting pulley 210. The pull rope 22 wound on the winding drum 212 passes through the wire outlet drum 211, then passes through the diverting pulley 210 and enters the guide cylinder 27. In this way, the magnitude of the tension value of the pull rope 22 between the winding drum 212, the diverting pulley 210 and the guide cylinder 27 will not change, thereby ensuring the accuracy of the tension value detection.

[0056] Since the pull rope 22 will repeatedly rub in the guide cylinder 27, in order to prevent the guide cylinder 27 from internal friction deformation, an anti-wear cylinder 28 can be detachably inserted into the guide cylinder 27. The top of the anti-wear cylinder 28 has a chamfer at the position where the pull rope 22 passes through, that is, the middle of the anti-wear cylinder 28 has a through hole for the pull rope 22 to pass through, and the top of the through hole has a chamfer. When the anti-wear cylinder 28 is deformed by friction, the deformed anti-wear cylinder 28 can be pulled out and replaced with a new anti-wear cylinder 28 for rapid use.

[0057] As an optional implementation, the drive motor 31, the torque sensor 34 and the electromagnetic clutch 37 can be connected to each other through the following structure: Figure 4 As shown, the first transmission gear 32 is connected to the driving motor 31. The torque sensor 34 can be installed on the fixing frame 30, and the second transmission gear 33 is connected to one end of the torque sensor 34, and the second transmission gear 33 is meshed with the first transmission gear 32. The third transmission gear 35 is connected to the other end of the torque sensor 34. The fourth transmission gear 36 is connected to the end of the electromagnetic clutch 37 away from the winding disk 212, and the fourth transmission gear 36 is meshed with the third transmission gear 35. The use of gears to transmit power is conducive to the driving motor 31 to transmit torque to the electromagnetic clutch 37, and the gear transmission is reliable and stable, and the later maintenance and overhaul are very convenient.

[0058] like Figure 1As shown, handles 12 can also be installed on other parts of the box 11 to facilitate the transportation of the entire device. A computer system 13 can also be installed on the box 11, and then the encoder 213, the electromagnetic clutch 37, the drive motor 31 and the torque sensor 34 are all electrically connected to the computer system 13, and the computer system 13 obtains the corresponding data signal and performs calculations, and can also display the corresponding values ​​thereon, so as to intuitively display the detection results. Some conventional operation buttons 14 and power and communication interfaces 15 can also be set on the box 11. The operation buttons 14 can be some corresponding buttons such as switches, start, pause, emergency stop, etc., and the power and communication interface 15 can realize the power supply and communication of the device. Obviously, batteries can also be set in the device for easy use.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above preferred embodiments shall not be regarded as limiting the present invention, and the protection scope of the present invention shall be subject to the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications shall also be regarded as the protection scope of the present invention.

Claims

1. A pantograph lifting detection device, characterized in that: It comprises a wire winding drum (212), a wire pulling box (20), a pull rope (22), an encoder (213), an electromagnetic clutch (37), a driving motor (31) and a torque sensor (34); The wire winding disc (212) is rotatably disposed in the wire pulling box (20); One end of the pull rope (22) is wound on the winding drum (212), and the other end extends outside the pull rope box (20) to be connected to the pantograph; The encoder (213) is connected to one end of the winding disk (212), and the electromagnetic clutch (37) is connected to the other end of the winding disk (212); The drive motor (31) is mounted on the wire draw box (20); the drive motor (31) is transmission-connected to the electromagnetic clutch (37) via the torque sensor (34).

2. A pantograph lifting detection device as claimed in claim 1, characterized in that: It also includes an angle correction mechanism; the angle correction mechanism includes a limit frame (23), a translation plate (24), a guide cylinder (27), a joint bearing (26) and an inclination sensor (29); The limiting frame (23) is connected to the wire drawing box (20); The translation plate (24) is arranged between the limit frame (23) and the wire drawing box (20) and can slide freely in the horizontal direction; The upper end of the guide cylinder (27) is connected to the translation plate (24) through the joint bearing (26); The inclination sensor (29) is mounted on the guide cylinder (27); The pull rope (22) passes through the limit frame (23), the translation plate (24) and the guide cylinder (27).

3. A pantograph lifting detection device as claimed in claim 2, characterized in that: The angle correction mechanism also includes a sliding limit mechanism (25); A plurality of sliding limit mechanisms (25) are respectively installed on the limit frame (23) and the wire draw box (20); The sliding limit mechanism (25) comprises a support (251) and a sliding body (252); the sliding body (252) is rotatably engaged with one end of the support (251) and abuts against the translation plate (24), and the other end of the support (251) is connected to the limit frame (23) / the wire draw box (20).

4. A pantograph lifting detection device as claimed in claim 2 or 3, characterized in that: The top of the wire pulling box (20) is provided with a support plate extending toward one side; the angle correction mechanism is installed on the support plate.

5. A pantograph lifting and lowering detection device as claimed in claim 4, characterized in that: Also includes a diverting pulley (210); The diverting pulley (210) is rotatably connected to the wire drawing box (20) and is located below the guide cylinder (27); The pull rope (22) wound on the winding drum (212) passes through the diverting pulley (210) and then enters the guide cylinder (27).

6. A pantograph lifting and lowering detection device as claimed in claim 5, characterized in that: Also includes a wire outlet barrel (211); The wire outlet drum (211) is installed on the wire pulling box (20) and is located between the wire winding drum (212) and the steering pulley (210); the length direction of the wire outlet drum (211) is tangent to the circumference of the wire winding drum (212) and the steering pulley (210); The pull rope (22) wound on the winding drum (212) passes through the outlet drum (211), then passes through the steering pulley (210) and enters the guide drum (27).

7. A pantograph lifting and lowering detection device as claimed in claim 2, characterized in that: The angle correction mechanism also includes an anti-wear cylinder (28); the anti-wear cylinder (28) is detachably arranged in the guide cylinder (27); the pull rope (22) passes through the anti-wear cylinder (28), and the top of the anti-wear cylinder (28) has a chamfer at the position where the pull rope (22) passes through.

8. A pantograph lifting and lowering detection device as claimed in claim 1, characterized in that: It also includes a first transmission gear (32), a second transmission gear (33), a third transmission gear (35) and a fourth transmission gear (36); The first transmission gear (32) is transmission-connected to the driving motor (31); The second transmission gear (33) and the third transmission gear (35) are respectively connected to two ends of the torque sensor (34), and the second transmission gear (33) is meshed with the first transmission gear (32); The fourth transmission gear (36) is connected to the electromagnetic clutch (37), and the fourth transmission gear (36) is meshed with the third transmission gear (35).

9. A pantograph lifting and lowering detection device as claimed in claim 1, characterized in that: The pull rope (22) is wound on the winding drum (212) in the form of a single-layer coil.

10. The pantograph lifting and lowering detection device according to claim 1, characterized in that: It also includes a computer system (13); the encoder (213), the electromagnetic clutch (37), the drive motor (31) and the torque sensor (34) are all electrically connected to the computer system (13).

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