A new type of OCS voltage detecting and grounding device

Abstract

The present invention discloses a novel pantograph inspection and grounding device, which relates to the technical field of rail transit detection. The key points of its technical solution are as follows: It further includes a second driving component and a grounding component; the first driving component, the inspection component, the second driving component, and the grounding component are all installed on the installation base; after the first driving component responds to the inspection signal output by the controller, it drives the inspection hook in the inspection component to contact the pantograph; after the second driving component responds to the grounding signal output by the controller, it drives the grounding hook in the grounding component to conduct with the grounding terminal; the controller detects the voltage value of the pantograph through the voltage transformer in the inspection component, adjusts the voltage value of the pantograph to the safe grounding voltage value by means of the secondary side discharge of the voltage transformer, and generates a grounding signal after the voltage value adjustment is completed. The present invention integrates inspection, discharge, and grounding, can be remotely operated, has a high degree of automation, perfect functions, convenient operation, and ensures the reliability of inspection.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit detection, and more specifically, it relates to a novel pantograph electro - testing and grounding device. Background Art

[0002] After each run of a locomotive on a section of track, it needs to return to the depot for maintenance operations. To ensure the safety of maintenance personnel on top of the power EMU, after the catenary power is cut off at the operation position in the maintenance depot, a grounding wire needs to be hung to discharge the residual voltage. Currently, the method of manual electro - testing and hanging the grounding wire is usually adopted. Since the grounding point of the catenary is relatively high from the ground, there are problems such as high labor intensity, low operation efficiency, and easy occurrence of incorrect hanging and removal. In addition, the current electro - testing methods are mostly non - contact electro - testing, which have problems such as inaccurate electro - testing results and low electro - testing efficiency, posing a threat to the safety of catenary operations in the power - off section. To solve the current situation, a novel pantograph electro - testing and grounding device is proposed. Summary of the Invention

[0003] To solve the deficiencies in the prior art, the purpose of the present invention is to provide a novel pantograph electro - testing and grounding device, which can realize the integration of electro - testing, discharging, and grounding of the railway catenary, and ensure the accuracy and precision of the electro - testing results.

[0004] The above technical objective of the present invention is achieved through the following technical solutions: A novel pantograph electro - testing and grounding device includes a controller, a first driving component, an electro - testing component, and a mounting base, and further includes a second driving component and a grounding component;

[0005] The first driving component, the electro - testing component, the second driving component, and the grounding component are all installed on the mounting base;

[0006] After the first driving component responds to the electro - testing signal output by the controller, it drives the electro - testing hook in the electro - testing component to contact the catenary;

[0007] After the second driving component responds to the grounding signal output by the controller, it drives the grounding hook in the grounding component to conduct with the grounding end;

[0008] The controller detects the voltage value of the catenary through the voltage transformer in the electro - testing component, adjusts the voltage value of the catenary to the safe grounding voltage value by the discharging method on the secondary side of the voltage transformer, and generates a grounding signal after the voltage value adjustment.

[0009] Furthermore, the first driving component further includes an electro - testing rod, an electro - testing crank arm, an epoxy pipe hoop assembly, a bearing seat, and an electro - testing speed reducer fixedly installed on the mounting base;

[0010] The output shaft of the electro - testing speed reducer is installed on the bearing seat through a bearing;

[0011] The end of the output shaft of the voltage-checking speed reducer is connected to the epoxy pipe hoop assembly;

[0012] The epoxy pipe hoop assembly is sleeved on the voltage-checking toggle arm;

[0013] The voltage-checking toggle arm is fixedly connected to the end of the voltage-checking rod;

[0014] The grounding hook is installed at the free end of the voltage-checking rod.

[0015] Furthermore, the voltage-checking speed reducer is provided with a limit switch, a travel switch, and a plug-in port for connecting a manual rocker;

[0016] The travel switch is used to detect whether the plug-in port inserts the manual rocker and outputs a limit signal after detecting the manual rocker;

[0017] The limit switch is used to adjust the maximum rotation limit of the voltage-checking speed reducer in a mechanical structure driving or program control manner after responding to the limit signal.

[0018] Furthermore, the voltage-checking speed reducer is configured with a manual reducer locking assembly; after the reducer locking assembly is started, it prevents grounding operations before voltage checking and grounding operations before the disconnection of the catenary disconnector.

[0019] Furthermore, the output shaft of the voltage-checking speed reducer is connected to the epoxy pipe hoop assembly through a worm and worm gear structure.

[0020] Furthermore, the mounting base is installed with a contact busbar through a composite insulator, and the contact busbar is grounded through a wire; after the grounding hook contacts the contact busbar, grounding discharge is carried out.

[0021] Furthermore, the voltage-checking assembly further includes a high-voltage current-limiting fuse and a voltage transmitter;

[0022] The voltage transformer is connected to the grounding hook through a wire;

[0023] The secondary coil of the voltage transformer outputs a 0-100V low-voltage signal to the voltage transmitter;

[0024] The voltage transmitter converts the AC analog voltage signal into a 4-20mA or 0-5V signal and transmits it to the controller to complete voltage acquisition.

[0025] Furthermore, the voltage-checking assembly is configured with at least two voltage transformers connected in parallel;

[0026] The controller is used to compare the voltage difference collected by the two voltage transformers or the voltage difference value collected by multiple voltage sensors with a standard threshold; if the voltage difference or voltage difference value exceeds the standard threshold, a fault signal and a locking signal for controlling the locking of the grounding hook and the grounding terminal for closing are output.

[0027] Furthermore, the first driving component is also provided with a follow-up device for adaptively adjusting the live-line checking hook along with the movement of the catenary;

[0028] The follow-up device includes a slider, a slide rail and a spring;

[0029] The slide rail is arranged at the edge of the main body part of the live-line checking hook. The slider is sleeved on the slide rail, and the slider is connected to the live-line checking rod in the live-line checking component through a pin;

[0030] One end of the spring is connected to the end part of the main body part of the live-line checking hook, and the other end is connected to the outer wall of the live-line checking rod.

[0031] Furthermore, the grounding hook is provided with a first fiber optic sensor and a second fiber optic sensor;

[0032] The first fiber optic sensor is used for outputting a first detection signal after detecting that the grounding hook contacts the catenary;

[0033] The second fiber optic sensor is used for outputting a second detection signal when detecting that there is an interaction force of 50 - 60 N between the grounding hook and the catenary;

[0034] The controller starts the live-line checking work after receiving the first detection signal and the second detection signal simultaneously.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. A novel catenary live-line checking and grounding device provided by the present invention integrates live-line checking, discharging and grounding, can be remotely operated, has a relatively high degree of automation, perfect functions and convenient operation; the contact type live-line checking ensures the reliability of live-line checking to the greatest extent;

[0037] 2. Through the dual-redundancy live-line checking design of the present invention, the voltage difference is directly calculated by directly subtracting the voltage values collected by two voltage transformers, or the voltage difference values are calculated in ways such as variance and mean square deviation for the voltage values collected by multiple parallel voltage transformers. By comparing with the standard threshold value, the error rate of the live-line checking result can be reduced;

[0038] 3. The follow-up device is adopted in the present invention to make the grounding hook and the catenary in stable contact, avoiding the separation of the catenary and the grounding hook caused by the shaking of the catenary, and improving the accuracy of the live-line checking result;

[0039] 4. The first fiber optic sensor and the second fiber optic sensor are adopted in the present invention for multi-level detection to verify the contact effectiveness, and the novel catenary live-line checking and grounding device can improve the efficiency and safety in actual operation.

[0040] 5. The present invention also performs the operations of voltage verification and grounding through multiple methods including manual and automated program control, enhancing the flexibility of the operations. Moreover, through the settings of the reducer locking component, travel switch, and limit switch, the safety of the grounding operation can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0042] Figure 1 is the schematic diagram of the overall structure in the embodiment of the present invention;

[0043] Figure 2 is the working principle diagram in the embodiment of the present invention;

[0044] Figure 3 is the partial structure schematic diagram of the first driving component in the embodiment of the present invention;

[0045] Figure 4 is the structure schematic diagram of the follower device in the embodiment of the present invention;

[0046] Figure 5 is the structure schematic diagram from another perspective in the embodiment of the present invention.

[0047] Reference numerals in the drawings and corresponding component names:

[0048] 101, mounting base; 102, first driving component; 103, voltage verification hook; 104, voltage transformer; 105, high-voltage current-limiting fuse; 106, voltage verification rod; 107, voltage verification reducer; 108, reducer locking component; 109, voltage verification crank arm; 110, epoxy pipe hoop component; 201, second driving component; 202, grounding hook; 203, contact busbar; 204, composite insulator; 205, manual rocker; 301, slide rail; 302, slider; 303, spring; 304, first fiber optic sensor; 305, second fiber optic sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and do not constitute a limitation to the present invention.

[0050] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0051] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0053] Embodiment: A new type of catenary voltage detecting and grounding device, as Figure 1 shown, includes a controller, a first driving component 102, a voltage detecting component, and a mounting base 101, and further includes a second driving component 201 and a grounding component. The first driving component 102, the voltage detecting component, the second driving component 201, and the grounding component are all mounted on the mounting base 101. After the first driving component 102 responds to the voltage detecting signal output by the controller, it drives the voltage detecting hook 103 in the voltage detecting component to contact the catenary. After the second driving component 201 responds to the grounding signal output by the controller, it drives the grounding hook 202 in the grounding component to conduct with the grounding terminal. The controller detects the voltage value of the catenary through the voltage transformer 104 in the voltage detecting component, adjusts the voltage value of the catenary to the safe grounding voltage value by means of the secondary side discharge of the voltage transformer 104, and generates a grounding signal after the voltage value adjustment is completed.

[0054] The present invention integrates voltage detection, discharging, and grounding, can be remotely operated, has a relatively high degree of automation, perfect functions, and is convenient to operate; the contact type voltage detection maximally guarantees the reliability of voltage detection.

[0055] As Figure 2 shown, QS1 and QS2 are isolating switches, and the opening and closing of the switches are realized by the rising and falling of the voltage detecting rod 106 in the first driving component 102 and the grounding rod in the second driving component 201. TV1 and TV2 are voltage transformers 104, and their function is to convert high voltage into low voltage for collecting voltage during voltage detection. FU1 and FU2 are high voltage fuses for protecting the voltage transformer 104.

[0056] Only QS1 is closed during voltage detection and discharging to connect the voltage transformer 104 circuit to realize contact type voltage detection. The hanging / removing of the grounding wire is realized by closing / opening QS1 and QS2 simultaneously.

[0057] In this embodiment, the controller can adopt a PLC, and the PLC can receive remote control signals to achieve remote operation.

[0058] As Figure 1 shown in Figure 3 Figure, the first driving component 102 further includes a live-line checking rod 106, a live-line checking elbow 109, an epoxy pipe hoop assembly 110, a bearing seat, and a live-line checking speed reducer 107 fixedly installed on the mounting base 101; the output shaft of the live-line checking speed reducer 107 is installed on the bearing seat through a bearing; the end of the output shaft of the live-line checking speed reducer 107 is connected to the epoxy pipe hoop assembly 110; the epoxy pipe hoop assembly 110 is sleeved with the live-line checking elbow 109; the live-line checking elbow 109 is fixedly connected to the end of the live-line checking rod 106; the grounding hook 202 is installed at the free end of the live-line checking rod 106.

[0059] In addition, the live-line checking speed reducer 107 is provided with a limit switch, a travel switch, and a plug-in port for connecting the manual rocker 205; the travel switch is used to detect whether the manual rocker 205 is inserted, and outputs a limit signal after detecting the manual rocker 205; the limit switch is used to adjust the maximum rotation limit of the live-line checking speed reducer 107 in a mechanical structure driving or program control manner after responding to the limit signal. For example, after the manual rocker 205 is inserted into the plug-in port, the travel switch is triggered, and then the controller controls the limit switch to move along the circumferential direction of the output shaft of the live-line checking speed reducer 107 according to the output signal of the travel switch. The movement of the limit switch can adopt the cooperation of a sliding track and a sliding sleeve.

[0060] As Figure 1 shown in Figure 5 Figure, the live-line checking speed reducer 107 is configured with a manual reducer locking component 108; after the reducer locking component 108 is started, it prevents grounding operations before live-line checking and grounding operations before the catenary disconnector is disconnected.

[0061] In addition, the output shaft of the live-line checking speed reducer 107 is provided with a worm and gear structure, which can effectively prevent the live-line checking speed reducer 107 from self-reversing and causing the live-line checking rod 106 to drop.

[0062] It should be noted that the working logic and method of the second driving component 201 are generally the same as those of the first driving component 102, and corresponding plug-in ports, travel switches, limit switches, and reducer locking components 108 are also provided.

[0063] In this embodiment, the motors in the power verification speed reducer 107 and the second drive assembly 201 are both stepper motors. The rotation of the stepper motor is controlled by a pulse command. The rotation speed of the motor is proportional to the pulse frequency. By controlling the pulse frequency, precise speed regulation can be achieved, and by controlling the number of pulses, precise positioning can be achieved. By setting a determined number of pulses and combining it with an external position detection signal, the effect of accurately positioning and stopping the motor can be achieved.

[0064] As Figure 5 shown, the mounting base 101 is provided with a contact busbar 203 through a composite insulator 204, and the contact busbar 203 is grounded through a wire; after the grounding hook 202 contacts the contact busbar 203, grounding discharge is carried out.

[0065] The power verification assembly further includes a high-voltage current-limiting fuse 105 and a voltage transmitter; the voltage transformer 104 is connected to the grounding hook 202 through a wire; the secondary coil of the voltage transformer 104 outputs a low-voltage signal of 0-100V to the voltage transmitter; the voltage transmitter converts the AC analog voltage signal into a 4-20mA or 0-5V signal and transmits it to the controller to complete voltage acquisition.

[0066] As Figure 1 With Figure 2 shown, the power verification assembly is configured with two voltage transformers 104 connected in parallel. The controller is used to compare the voltage difference collected by the two voltage transformers 104 with a standard threshold; if the voltage difference and the voltage difference value exceed the standard threshold, a fault signal and a locking signal for controlling the grounding hook 202 to be locked and closed with the grounding end are output. If three or more voltage transformers 104 are connected in parallel, the voltage difference value collected by multiple voltage sensors is compared with the standard threshold. Through the dual-redundancy power verification design of the present invention, the voltage difference is directly calculated by directly subtracting the voltage values collected by the two voltage transformers 104, or the voltage difference value is calculated by means of variance, mean square deviation, etc. for the voltage values collected by multiple parallel voltage transformers 104. By comparing with the standard threshold, the error rate of the power verification result can be reduced.

[0067] As Figure 4As shown in the figure, the first driving component 102 is further provided with a follow-up device for controlling the electroscope hook 103 to adaptively adjust as the catenary moves; the follow-up device includes a slider 302, a slide rail 301 and a spring 303; the slide rail 301 is arranged on the edge of the main body part of the electroscope hook 103, the slider 302 is sleeved with the slide rail 301, and the slider 302 is connected to the electroscope rod 106 in the electroscope assembly through a pin; one end of the spring 303 is connected to the end of the main body part of the electroscope hook 103, and the other end is connected to the outer wall of the electroscope rod 106. The present invention uses a follow-up device to stably contact the grounding hook 202 and the catenary. When the catenary shakes up and down, the spring 303 is in a deformed state and can provide an adaptive pressure between the grounding hook 202 and the catenary, so as to keep the grounding hook 202 and the catenary in contact all the time, avoiding the separation of the catenary and the grounding hook 202 caused by the shaking of the catenary, and improving the accuracy of the electroscope result. The spring 303 needs to ensure that there is a force of 50 - 60N between the grounding hook 202 and the catenary.

[0068] Through experimental analysis: after installing the follow-up device, the accuracy of the electroscope voltage is improved by 1%, and after removing the follow-up device, the accuracy of the electroscope is 2%. At present, for the electroscope devices on the market, whether it is non-contact electroscope or manual contact electroscope, the accuracy is greater than 15%.

[0069] As Figure 4 shown in the figure, the grounding hook 202 is provided with a first fiber optic sensor 304 and a second fiber optic sensor 305; the first fiber optic sensor 304 is used to output a first detection signal after detecting the contact between the grounding hook 202 and the catenary; the second fiber optic sensor 305 is used to output a second detection signal when detecting that there is an interaction force of 50 - 60N between the grounding hook 202 and the catenary; the controller starts the electroscope work after receiving the first detection signal and the second detection signal at the same time. The first fiber optic sensor 304 and the second fiber optic sensor 305 are used for multi-level detection to verify the contact effectiveness, and this new type of catenary electroscope grounding device can improve the efficiency and safety in actual operation.

[0070] In this embodiment, the model of the first fiber optic sensor 304 is FS-N41N; the model of the second fiber optic sensor 305 is FU-67. It should be noted that the first fiber optic sensor 304 and the second fiber optic sensor 305 can also adopt other models that can achieve the above functions, which are not limited here.

[0071] The specific embodiments described above further elaborate on the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel catenary voltage detection and grounding device, comprising a controller, a first driving assembly (102), a voltage detection assembly and a mounting base (101), characterized in that, It further includes a second driving component (201) and a grounding component; The first driving component (102), the power verification component, the second driving component (201) and the grounding component are all installed on the mounting base (101); After the first driving component (102) responds to the power verification signal output by the controller, it drives the power verification hook (103) in the power verification component to contact the catenary; After the second driving component (201) responds to the grounding signal output by the controller, it drives the grounding hook (202) in the grounding component to conduct with the grounding end; The controller detects the voltage value of the catenary through the voltage transformer (104) in the power verification component, adjusts the voltage value of the catenary to the safe grounding voltage value by means of the secondary side discharge of the voltage transformer (104), and generates a grounding signal after the voltage value is adjusted; The first driving component (102) is also provided with a follow-up device for adaptively adjusting the power verification hook (103) as the catenary moves; The follow-up device includes a slider (302), a slide rail (301) and a spring (303); The slide rail (301) is arranged on the edge of the main body part of the power verification hook (103), the slider (302) is sleeved on the slide rail (301), and the slider (302) is connected to the power verification rod (106) in the power verification component through a pin; One end of the spring (303) is connected to the end of the main body part of the power verification hook (103), and the other end is connected to the outer wall of the power verification rod (106); The power verification hook (103) is provided with a first fiber optic sensor (304) and a second fiber optic sensor (305); The first fiber optic sensor (304) is used to output a first detection signal after detecting that the power verification hook (103) contacts the catenary; The second fiber optic sensor (305) is used to output a second detection signal when detecting that there is an interaction force of 50-60 N between the power verification hook (103) and the catenary; The controller starts the power verification work after receiving the first detection signal and the second detection signal at the same time; The mounting base (101) is installed with a contact busbar (203) through a composite insulator (204), and the contact busbar (203) is grounded through a wire; after the grounding hook (202) contacts the contact busbar (203), grounding discharge is carried out; The power verification component further includes a high-voltage current-limiting fuse (105) and a voltage transmitter; The voltage transformer (104) is connected to the grounding hook (202) through a wire; The secondary coil of the voltage transformer (104) outputs a 0-100 V low-voltage signal to the voltage transmitter; The voltage transmitter converts the AC analog voltage signal into a 4-20 mA or 0-5 V signal and transmits it to the controller to complete voltage acquisition.

2. The novel OCS (Overhead Contact System) voltage detection and grounding device according to claim 1, characterized in that, The first driving component (102) further includes a power verification rod (106), a power verification crank arm (109), an epoxy pipe hoop assembly (110), a bearing seat and a power verification speed reducer (107) fixedly installed on the mounting base (101); The output shaft of the power verification speed reducer (107) is installed on the bearing seat through a bearing; The end of the output shaft of the power verification speed reducer (107) is connected to the epoxy pipe hoop assembly (110); The epoxy pipe hoop assembly (110) is sleeved with the live-line checking crank arm (109). The live-line checking crank arm (109) is fixedly connected to the end of the live-line checking rod (106). The grounding hook (202) is installed at the free end of the live-line checking rod (106).

3. A novel overhead catenary voltage detector and grounding device according to claim 2, characterized in that, The live-line checking speed reducer (107) is provided with a limit switch, a travel switch and a plug-in port for connecting a manual rocker (205). The travel switch is used to detect whether the manual rocker (205) is inserted into the plug-in port, and outputs a limit signal after detecting the manual rocker (205). The limit switch is used to adjust the maximum rotation limit of the live-line checking speed reducer (107) in a mechanical structure driving or program control manner after responding to the limit signal.

4. A novel catenary voltage detecting and grounding device according to claim 2, characterized in that, The live-line checking speed reducer (107) is configured with a manual reducer locking assembly (108); after the reducer locking assembly (108) is started, it prevents grounding operations from occurring before live-line checking and grounding operations from occurring before the catenary disconnector is disconnected.

5. A novel catenary voltage detection and grounding device according to claim 2, characterized in that, The output shaft of the live-line checking speed reducer (107) is connected to the epoxy pipe hoop assembly (110) through a worm and worm gear structure.

6. A novel catenary voltage detecting and grounding device according to claim 1, characterized in that, The live-line checking assembly is configured with at least two voltage transformers (104) arranged in parallel. The controller is used to compare the voltage difference collected by the two voltage transformers (104) or the voltage difference values collected by multiple voltage sensors with a standard threshold; if the voltage difference or voltage difference values exceed the standard threshold, a fault signal and a locking signal for controlling the grounding hook (202) to be locked and closed with the grounding end are output.

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