High-speed pantograph contact pressure fault early warning device

Abstract

The invention discloses a high-speed pantograph contact pressure fault early warning device which comprises an arm rod, a pantograph head assembly is installed at the arm rod, a sleeve body is arranged at one end of the pantograph head assembly, an elastic piece is installed at the sleeve body, a plurality of sets of through holes are formed in the arm rod, a plurality of sets of hook bodies are placed at the arm rod in an attached mode, and the hook bodies are arranged in the through holes. Multiple groups of insertion rods movably penetrate through the multiple groups of hook bodies, the multiple groups of insertion rods penetrate through the corresponding through holes, pressure sensors are arranged at the multiple groups of hook bodies, springs are in clearance fit with the outer walls of the multiple groups of insertion rods, one ends of the multiple groups of springs are connected with the corresponding insertion rods, and the other ends of the multiple groups of springs are connected with the corresponding through holes. And the other ends of the plurality of groups of springs are connected with the corresponding hook bodies. According to the invention, the insertion rods are moved out of the corresponding through holes, and the hook body can drive the pressure sensor to be quickly separated from the arm rod, so that if the rest time at a station is short, the pressure sensor needs to be replaced, the operation is relatively time-saving and quick, and the maintenance is relatively simple.

Description

Technical Field

[0001] The present invention relates to the technical field related to pantographs, and in particular to a high-speed pantograph contact pressure fault early warning device. Background Art

[0002] The high-speed pantograph is a key component for electric traction locomotives to obtain electric energy from the fixed power supply contact network. It is installed on the top of electric locomotives or electric vehicles. Its main function is to maintain reliable sliding contact with the contact network when the train is running at high speed, introduce high-voltage AC on the contact network into the train's electrical system, provide power for the train's traction motor, lighting, air conditioning and other equipment, and ensure the normal operation of the train. In order to detect the pressure generated by the pantograph when it is in contact with the contact network and avoid damage to the pantograph due to excessive pressure, a pressure sensor will be installed at the pantograph to detect the pressure when the pantograph is in contact. Although the existing pressure fault warning device can detect the contact pressure of the pantograph, the general pressure sensor is usually installed on the pantograph using bolts and other connectors. If the rest time at the station is short, the pressure sensor needs to be replaced, which is relatively time-consuming and difficult to maintain. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a high-speed pantograph contact pressure fault warning device.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A high-speed pantograph contact pressure fault warning device comprises an arm, a bow head assembly is installed on the arm, a sleeve is provided at one end of the bow head assembly, an elastic sheet is installed on the sleeve, a plurality of groups of through holes are provided on the arm, a plurality of groups of hooks are placed in close contact on the arm, a plurality of groups of plug rods are movably penetrated by the plurality of groups of hooks, the plurality of groups of plug rods respectively penetrate the corresponding through holes, pressure sensors are provided on the plurality of groups of hooks, springs are gap-fitted on the outer walls of the plurality of groups of plug rods, one end of the plurality of groups of springs is connected to the corresponding plug rod, and the other end of the plurality of groups of springs is connected to the corresponding hook body.

[0005] Preferably, two groups of first baffles are connected to the arm rod, the two groups of the first baffles are attached with the same second baffle, and the second baffle is connected to the plurality of groups of the hook bodies.

[0006] Preferably, a plurality of groups of the insertion rods are respectively connected to corresponding blocks.

[0007] Preferably, a first rubber pad is adhered to the joints between the plurality of groups of the hook bodies and the arm rods.

[0008] Preferably, second rubber pads are adhered to the joints of multiple groups of the first baffles and the second baffles.

[0009] Preferably, the sleeve body is connected to the bow head assembly via bolts.

[0010] Preferably, a plurality of groups of the hook bodies are connected to the pressure sensors via bolts.

[0011] A warning method for a high-speed pantograph contact pressure fault warning device comprises the following steps: Data collection: using an elastic sheet (4) mounted on a sleeve (3) at one end of a pantograph head assembly (2), when the pantograph contacts the contact network, the elastic sheet (4) can sense contact pressure; the elastic sheet (4) contacts a pressure sensor (6) to convert the contact pressure into an electrical signal; Signal transmission: The pressure sensor (6) transmits the sensed pressure signal to the train control system; Data processing and analysis: The train control system receives the pressure signal and analyzes it according to the preset pressure threshold to determine whether the contact pressure is within the normal range; Fault warning: If the contact pressure exceeds the preset threshold, the control system will issue a fault warning signal to prompt the driver or maintenance personnel to conduct inspection and maintenance; Rapid maintenance: when the pressure sensor (6) needs to be replaced, the plug rod (8) is pulled out from the through hole (7), and the hook body (5) drives the pressure sensor (6) to be quickly separated from the arm (1), thereby achieving rapid replacement; The block (10) and the insert rod (8) cooperate with each other, and the rubber pads (13) and (14) between the hook body (5) and the arm rod (1) provide protection and buffering, thereby ensuring that the replacement process is simple and quick.

[0012] System reset: After replacing the pressure sensor (6), reinstall and test to ensure that the contact pressure monitoring system returns to normal working condition.

[0013] The beneficial effects of the present invention are: 1. Through the coordination between the arm, hook, through hole, pressure sensor, spring and block, the hook can drive the pressure sensor to separate quickly from the arm by moving the plug rod out of the corresponding through hole. In this way, if the rest time at the site is short, the pressure sensor needs to be replaced, which is relatively time-saving and fast, and the maintenance is relatively simple; 2. Through the cooperation between the first baffle and the second baffle, when the pressure sensor is installed on the arm, the second baffle will be placed in close contact with the two groups of first baffles, so that the second baffle and multiple groups of first baffles can constitute a certain range of protection, reducing the probability of damage to the pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a structural schematic diagram of a high-speed pantograph contact pressure fault warning device proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the middle plug rod, the block and the first baffle; Figure 3 for Figure 1 Schematic diagram of the structure of the middle casing, elastic sheet and pressure sensor; Figure 4 for Figure 1 Schematic diagram of the structure of the pressure sensor, the plunger and the block; Figure 5 for Figure 1 Schematic diagram of the structure of the middle arm rod, bow head assembly and sleeve body.

[0015] In the figure: 1, arm; 2, bow head assembly; 3, sleeve; 4, elastic sheet; 5, hook body; 6, pressure sensor; 7, through hole; 8, plug rod; 9, spring; 10, block; 11, first baffle; 12, second baffle; 13, first rubber pad; 14, second rubber pad. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0017] Example 1, reference Figures 1 to 5A high-speed pantograph contact pressure fault warning device includes an arm 1, a bow head assembly 2 is installed at the arm 1, a sleeve 3 is provided at one end of the bow head assembly 2, an elastic sheet 4 is installed at the sleeve 3, and the elastic sheet 4 is installed at the sleeve 3. The elastic sheet 4 is installed at the sleeve 3 and is made of a spring steel sheet with good elasticity, and can contact the pressure sensor 6 when the bow head assembly 2 swings. When the bow head assembly 2 is in continuous contact with the external contact network and performs adaptive swinging, if the swing amplitude is too large, the bow head assembly 2 will drive the elastic sheet 4 to move synchronously, so that the free end of the elastic sheet 4 contacts the pressure sensor 6. The surface of the elastic sheet 4 is finely polished and has low roughness to reduce the friction when in contact with the pressure sensor 6 and ensure the accuracy of pressure transmission. The arm 1 is provided with multiple sets of through holes 7, and multiple sets of hooks 5 are placed in close contact with the arm 1. Multiple sets of hooks 5 are movably penetrated by multiple sets of plug rods 8, and multiple sets of plug rods 8 are respectively penetrated by corresponding through holes 7. Pressure sensors 6 are provided at multiple sets of hooks 5. The pressure sensor 6 adopts a high-precision piezoelectric sensor, which can accurately measure the pressure applied by the elastic sheet 4 and convert the pressure signal into an electrical signal to transmit to the control system of the train. The measurement range of the pressure sensor 6 is 0-100N, and the accuracy can reach ±0.5N, which can meet the requirements of high-speed pantograph contact pressure monitoring. The housing of the pressure sensor 6 needs to be made of engineering plastics with a high protection level, with good waterproof, dustproof and impact resistance, to ensure stable operation in harsh operating environments. The outer walls of multiple groups of plug rods 8 are all fitted with springs 9, one end of multiple groups of springs 9 is connected to the corresponding plug rods 8, and the other end of multiple groups of springs 9 is connected to the corresponding hook body 5. By moving the plug rods 8 out of the corresponding through holes 7, the hook body 5 can be separated from the arm 1, which is convenient for rapid disassembly and replacement when the pressure sensor 6 is damaged. When a fault occurs or regular maintenance is required during the operation of the train, the operator can operate quickly and conveniently, reducing the downtime of the train and improving operational efficiency.

[0018] In this embodiment, two groups of first baffles 11 are connected to the arm 1, and the same second baffle 12 is attached to the two groups of first baffles 11. The first baffle 11 and the second baffle 12 are made of metal sheets. The two groups of first baffles 11 are symmetrically mounted on the arm 1 and fixed to the arm 1 by welding or bolting. The main function of the first baffle 11 and the second baffle 12 is to provide lateral protection for the hook body 5 and the pressure sensor 6 to prevent foreign objects from colliding or interfering with the normal operation of the pressure sensor 6 during the operation of the train. The edges of the first baffle 11 and the second baffle 12 can be curled to avoid scratching the operator or other parts. The second baffle 12 is connected to multiple groups of hook bodies 5, and multiple groups of plug rods 8 are respectively connected to corresponding blocks 10. The joints of multiple groups of hook bodies 5 and arm rods 1 are adhered with first rubber pads 13. The first rubber pads 13 can increase the friction between the hook body 5 and the arm rod 1 to prevent the hook body 5 from being displaced during operation, and at the same time play a role of buffering and shock absorption to protect the surface of the arm rod 1 and the hook body 5. The joints of multiple groups of first baffles 11 and second baffles 12 are adhered with second rubber pads 14. The second rubber pads 14 can fill the gap between the first baffle 11 and the second baffle 12 to further enhance the protection effect, and at the same time play a role of buffering and sealing to prevent dust, moisture and other impurities from entering the installation area of ​​the pressure sensor 6, thereby reducing the probability of damage to the pressure sensor 6. The sleeve 3 is connected to the bow head assembly 2 by bolts, and the multiple groups of hook bodies 5 are connected to the pressure sensor 6 by bolts. The second baffle 12 and the hook body 5 are fixed by bolt connection or riveting. The connection is firm and reliable, ensuring that the second baffle 12 will not loosen or move during the operation of the train.

[0019] The present invention also relates to an early warning method of a high-speed pantograph contact pressure fault early warning device, comprising the following steps: Data collection: using an elastic sheet (4) mounted on a sleeve (3) at one end of a pantograph head assembly (2), when the pantograph contacts the contact network, the elastic sheet (4) can sense contact pressure; the elastic sheet (4) contacts a pressure sensor (6) to convert the contact pressure into an electrical signal; Signal transmission: The pressure sensor (6) transmits the sensed pressure signal to the train control system; Data processing and analysis: The train control system receives the pressure signal and analyzes it according to the preset pressure threshold to determine whether the contact pressure is within the normal range; Fault warning: If the contact pressure exceeds the preset threshold, the control system will issue a fault warning signal to prompt the driver or maintenance personnel to conduct inspection and maintenance; Rapid maintenance: when the pressure sensor (6) needs to be replaced, the plug rod (8) is pulled out from the through hole (7), and the hook body (5) drives the pressure sensor (6) to be quickly separated from the arm (1), thereby achieving rapid replacement; The block (10) and the insert rod (8) cooperate with each other, and the rubber pads (13) and (14) between the hook body (5) and the arm rod (1) provide protection and buffering, thereby ensuring that the replacement process is simple and quick.

[0020] System reset: After replacing the pressure sensor (6), reinstall and test to ensure that the contact pressure monitoring system returns to normal working condition.

[0021] The working principle of this embodiment: when in use, when the high-speed pantograph is in operation, the bow head assembly 2 is in constant contact with the contact network and performs adaptive swinging. Under normal circumstances, the swing amplitude of the bow head assembly 2 is within a certain range, and the elastic sheet 4 will not contact the pressure sensor 6. When the swing amplitude of the bow head assembly 2 is too large, for example, due to uneven contact network or changes in the running state of the train, the bow head assembly 2 will drive the elastic sheet 4 to move synchronously, so that the free end of the elastic sheet 4 contacts the pressure sensor 6. The elastic sheet 4 applies pressure to the pressure sensor 6, and the pressure sensor 6 measures the pressure value in real time and converts it into an electrical signal to transmit to the control system of the train. The control system makes a judgment based on the preset pressure threshold. If the measured pressure exceeds the threshold, it is determined that the contact pressure is abnormal, and there may be a risk of pantograph failure. At this time, the control system will issue a fault warning signal to remind the operator to check and handle it. When the pressure sensor 6 is damaged, the block 10 is used to drive the multiple groups of plug rods 8 to pull out the corresponding through holes 7, so that the hook body 5 can be separated from the arm 1, and the pressure sensor 6 can be disassembled and then replaced.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-speed pantograph contact pressure fault warning device, comprising an arm (1), characterized in that: A bow head assembly (2) is installed at the arm (1), a sleeve (3) is provided at one end of the bow head assembly (2), an elastic sheet (4) is installed at the sleeve (3), a plurality of groups of through holes (7) are provided at the arm (1), a plurality of groups of hook bodies (5) are placed in close contact with the arm (1), a plurality of groups of hook bodies (5) are movably penetrated by a plurality of groups of insertion rods (8), a plurality of groups of insertion rods (8) respectively penetrate the corresponding through holes (7), a plurality of groups of hook bodies (5) are provided with pressure sensors (6), a plurality of groups of insertion rods (8) are gap-fitted on the outer walls of the plurality of groups of insertion rods (8), one end of the plurality of groups of springs (9) is connected to the corresponding insertion rod (8), and the other end of the plurality of groups of springs (9) is connected to the corresponding hook body (5).

2. A high-speed pantograph contact pressure fault warning device according to claim 1, characterized in that: Two groups of first baffles (11) are connected to the arm (1), the two groups of the first baffles (11) are attached with the same second baffle (12), and the second baffle (12) is connected to a plurality of groups of the hook bodies (5).

3. A high-speed pantograph contact pressure fault warning device according to claim 1, characterized in that: A plurality of groups of the insertion rods (8) are respectively connected to corresponding blocks (10).

4. A high-speed pantograph contact pressure fault warning device according to claim 1, characterized in that: A first rubber pad (13) is adhered to the joints between the plurality of groups of hook bodies (5) and the arm rods (1).

5. The high-speed pantograph contact pressure fault warning device according to claim 1, characterized in that: Second rubber pads (14) are bonded to the joints between the plurality of groups of the first baffles (11) and the second baffles (12).

6. A high-speed pantograph contact pressure fault warning device according to claim 1, characterized in that: The sleeve body (3) is connected to the bow head assembly (2) via bolts.

7. A high-speed pantograph contact pressure fault warning device according to claim 1, characterized in that: A plurality of groups of the hook bodies (5) are connected to the pressure sensors (6) via bolts.

8. An early warning method based on the high-speed pantograph contact pressure fault early warning device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Data collection: using an elastic sheet (4) mounted on a sleeve (3) at one end of a pantograph head assembly (2), when the pantograph contacts the contact network, the elastic sheet (4) can sense contact pressure; the elastic sheet (4) contacts a pressure sensor (6) to convert the contact pressure into an electrical signal; Signal transmission: The pressure sensor (6) transmits the sensed pressure signal to the train control system; Data processing and analysis: The train control system receives the pressure signal and analyzes it according to the preset pressure threshold to determine whether the contact pressure is within the normal range; Fault warning: If the contact pressure exceeds the preset threshold, the control system will issue a fault warning signal to prompt the driver or maintenance personnel to conduct inspection and maintenance; Rapid maintenance: when the pressure sensor (6) needs to be replaced, the plug rod (8) is pulled out from the through hole (7), and the hook body (5) drives the pressure sensor (6) to be quickly separated from the arm (1), thereby achieving rapid replacement; The block (10) and the plug rod (8) are matched, and the rubber pads (13) and (14) between the hook body (5) and the arm rod (1) provide protection and buffering, thereby ensuring that the replacement process is simple and quick; System reset: After replacing the pressure sensor (6), reinstall and test to ensure that the contact pressure monitoring system returns to normal working condition.

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