Portable switch contact pressure detection device

Abstract

The utility model discloses a portable switch contact pressure detection device which comprises a pressure sensor, a fixing base, an upper pressing plate, a shifting fork A, a shifting fork B and a lower pressing plate, the lower pressing plate is installed at the upper end of the pressure sensor through a fixing bolt a, and the fixing base is installed at the lower end of the pressure sensor through a fixing bolt b. The fixed base is fixed with the shifting fork B through a positioning fixing pin a; the upper pressing plate is fixed with the shifting fork A through a positioning fixing pin b; the shifting fork A and the shifting fork B are connected together through a fixing pin and only rotate relatively in the vertical direction. The beneficial effects of the utility model are that the pressure of the disconnecting switch blade can be detected through the contact pressure detection device, and accidents such as equipment burnout or sudden power failure caused by small pressure can be avoided; and performing problem analysis according to the statistical knife switch pressure condition of the separated knife switch, and performing corresponding maintenance aiming at problem equipment. Therefore, the user personnel cost and the equipment maintenance cost are reduced; and the accident rate of outdoor separation can be reduced by 60%.

Description

TECHNICAL FIELD

[0001] The utility model belongs to railway power supply technical field, especially relates to a portable switch contact pressure detection device. BACKGROUND

[0002] At present, most high-voltage disconnectors used in electrified railway power supply system bear the task of normal power supply for vehicle operation, power cut-off and circuit conversion in case of failure, and are important equipment for ensuring normal operation of traction power supply system. Outdoor disconnector is a kind of electrical equipment that is completely exposed to atmospheric working environment and is most directly and seriously affected by environmental and climatic conditions. Due to the structural form of the disconnector, the contact finger is a relatively sliding structure, and the contact part is easy to be eroded by dust and harmful gas, resulting in poor contact and heating. The pressure spring provides sufficient pressure, and the contact finger has self-cleaning ability to reduce the failure rate caused by the environment. However, the pressure spring will also cause the spring pressure to decay over time due to its own creep characteristics, resulting in insufficient self-cleaning ability, poor contact of the contact finger and heating, and ultimately leading to the ablation of the blade. Whether the blade contact is good or not is determined by the loop resistance and the feeler gauge during the maintenance of the disconnector. Due to the indirect measurement and operation method, it is difficult to effectively detect whether the blade pressure meets the design requirements. SUMMARY

[0003] The utility model discloses a portable switch contact pressure detection device can realize the measurement of outdoor line apart from the contact pressure of switch, through the statistical measurement analysis the change trend of disconnector contact pressure, predict the failure development trend, namely make the initiative maintenance decision before the disconnector failure will occur, guarantee its state level.

[0004] In order to achieve the above object, the utility model adopts the technical scheme: a portable switch contact pressure detection device, including pressure sensor, sensor lower pressing plate, fixed position pin, sensor fixed base, fixed bolt, sensor upper pressing plate, yoke fixed pin, yoke adjusting bolt, yoke A, yoke B, pressure sensor, pressure sensor is arranged in the recess of sensor fixed base and the upper end surface is higher than sensor fixed base, and the wire of pressure sensor passes through the wire hole of sensor fixed base, sensor lower pressing plate is connected with the upper end surface of pressure sensor and is fixed through fixed bolt, yoke A, yoke B are movably connected through yoke fixed pin and are fixed to sensor fixed base, sensor upper pressing plate respectively.

[0005] Yoke A and yoke B all include U-shaped head and handle connected with the U-shaped head, yoke A and yoke B are provided with the corresponding insertion ring and insertion ring connected through yoke fixed pin, the hole of yoke A is connected to the fixed pin hole of sensor fixed base through fixed position pin, and yoke B is connected to sensor upper pressing plate through fixed position pin.

[0006] The shift fork A and the shift fork B rotate relative to the shift fork fixing pin as the center; when the shift fork A and the shift fork B rotate towards the inner side, the distance between the sensor lower pressing plate and the outermost side of the sensor upper pressing plate becomes larger, and vice versa.

[0007] The shift fork A is provided with a threaded hole, the shift fork adjusting bolt is connected with the shift fork A through the threaded hole, the distance between the sensor lower pressing plate and the sensor upper pressing plate is changed by adjusting the depth of the shift fork adjusting bolt screwed into the threaded hole.

[0008] The fixing bolt is embedded into the sensor upper pressing plate, and the relative rotation between the sensor upper pressing plate and the sensor fixing base is limited.

[0009] The beneficial effects of the utility model are as follows: the contact pressure detection device can detect the pressure of the disconnecting switch blade, can avoid the accidents caused by small pressure, such as equipment burning or sudden power failure; the blade pressure of the disconnecting switch is counted, the problem is analyzed, and the corresponding maintenance is carried out on the problem equipment, so as to reduce the personnel cost and equipment maintenance cost of users; and the accident rate of outdoor disconnecting switch is reduced by 60%. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is an assembly schematic view of the portable switch contact pressure detection device of the utility model;

[0011] Fig. 2 It is an assembly schematic view of the pressure sensor of the pressure detection device of the utility model;

[0012] Fig. 3 It is a relative installation schematic view of the sensor upper pressing plate and the sensor fixing base of the pressure detection device of the utility model;

[0013] Fig. 4 It is an assembly schematic view of the shift fork A, the shift fork B, the adjusting bolt and the fixing pin of the pressure detection device of the utility model;

[0014] Fig. 5 It is a switch contact schematic view;

[0015] Fig. 6 It is a schematic view of the pressure detection device measuring the contact pressure.

[0016] In the drawing:

[0017] 1. Sensor lower pressing plate 2. Positioning fixing pin

[0018] 3. Sensor fixing base 4a. Fixing bolt a

[0019] 4b. Fixing bolt b 5. Sensor upper pressing plate

[0020] 6. Shift fork fixing pin 7. Shift fork adjusting bolt

[0021] 8. Fork A 9. Fork B

[0022] 10. Sensor 11. Fixed pin hole

[0023] 12. Wire hole 14. Fork B insertion ring

[0024] 15. Fork A insertion ring 16. Fork A hole

[0025] 19. Switch contact 20. Switch contact knife switch

[0026] 21. Fork adjustment bolt hole 22. Sensor wire DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in connection with the drawings and specific embodiments:

[0028] As Figs. 1 to 4 shown, the utility model discloses a portable switch contact pressure detection device, including sensor lower pressing plate 1, positioning fixed pin 2, sensor fixed base 3, fixed bolt 4, sensor upper pressing plate 5, fork fixed pin 6, fork adjustment bolt 7, fork A, fork B, fixed pin hole 11, wire hole 12, fork B insertion ring 14, fork A insertion ring 15, fork A hole 16, fork adjustment bolt hole 21, sensor wire 22, sensor lower pressing plate 1 is installed on the upper end of pressure sensor 10 through fixed bolt a, sensor fixed base 3 is installed at the lower end of pressure sensor through fixed bolt b, and sensor fixed base 3 is fixed with fork B through positioning fixed pin, the sensor upper pressing plate 5 is fixed with fork A through positioning fixed pin, the fork A, fork B are connected together through fork fixed pin 6, when making relative rotation to the inside in the two sides of fork A, fork B, fork A, fork B make relative rotation with fork fixed pin as center.

[0029] Figs. 5-6 As shown in the measurement schematic diagram of the utility model discloses a portable switch contact pressure detection device, according to the width after the closing of the knife switch 20, adjusts fork adjustment bolt 7, makes the pressure detection device consistent with the knife switch width when the maximum size of expansion, then inserts sensor lower pressing plate 1 and sensor upper pressing plate 5 of pressure detection device into the middle of the knife switch, and presses fork A / B from the outside, and the distance of sensor upper and lower pressing plate becomes larger until contacting the knife switch and making the knife switch reach the closing state, and the pressure of switch contact 19 is measured.

Claims

1. A portable switch contact pressure detection device, characterized by: The pressure sensor (10), sensor lower pressing plate (1), positioning fixing pin (2), sensor fixing base (3), fixing bolt (4), sensor upper pressing plate (5), yoke fixing pin (6), yoke adjusting bolt (7), yoke A (8), yoke B (9), pressure sensor (10), the pressure sensor (10) is arranged in the recess of the sensor fixing base (3) and the upper end surface is higher than the sensor fixing base (3), the wire (22) of the pressure sensor (10) passes through the wire hole (12) of the sensor fixing base (3), the sensor lower pressing plate (1) is connected with the upper end surface of the pressure sensor (10) and is fixed through the fixing bolt (4), the yoke A (8) and the yoke B (9) are movably connected through the yoke fixing pin (6) and are fixed on the sensor fixing base (3) and the sensor upper pressing plate (5) respectively.

2. The portable switch contact pressure detection device of claim 1, wherein: The yoke A (8) and the yoke B (9) each include a U-shaped head and a handle connected thereto, the yoke A (8) and the yoke B (9) are provided with a yoke B insertion ring (14) and a yoke A insertion ring (15) connected through the yoke fixing pin (6), the hole (16) of the yoke A is connected to the fixing pin hole (11) of the sensor fixing base (3) through the positioning fixing pin (2), and the yoke B is connected to the sensor upper pressing plate through the positioning fixing pin (2).

3. A portable switch contact pressure detection device according to claim 2, characterized in that: The yoke A and the yoke B relatively rotate with the yoke fixing pin (6) as the center; when the yoke A and the yoke B rotate inward on both sides, the distance between the sensor lower pressing plate (1) and the outermost side of the sensor upper pressing plate (5) becomes larger, and vice versa.

4. The portable switch contact pressure detection device of claim 2, wherein: The yoke A is provided with a yoke adjusting bolt hole (21), the yoke adjusting bolt (7) is connected to the yoke A through the yoke adjusting bolt hole (21), the distance between the sensor lower pressing plate (1) and the sensor upper pressing plate (5) is changed by adjusting the depth of the yoke adjusting bolt (7) screwed into the yoke adjusting bolt hole (21).

5. The portable switch contact pressure detection device of claim 1, wherein: The fixing bolt (4) is embedded into the sensor upper pressing plate (5), so that the relative rotation of the sensor upper pressing plate (5) and the sensor fixing base (3) is limited.

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