A device for measuring the travel of a switch contact.

Abstract

A device for measuring the contact travel of a switch includes a measuring plate with multiple extensions evenly distributed around its center. The measuring plate also includes a level and multiple distance measuring structures, and an adjustable support structure at its bottom. This structure enhances the overall anti-interference capability, effectively eliminating human error and tilting errors inherent in traditional tools. The quick-assembly and disassembly design shortens assembly and storage time, improving maintenance efficiency. The modular design allows for disassembly and storage of components, reducing space requirements and facilitating handling in complex environments such as power plant sites.

Description

Technical Field

[0001] This utility model relates to the field of hydropower engineering equipment maintenance technology, and in particular to a device for measuring the contact travel of a switch. Background Technology

[0002] Currently, in the overhaul of gas circuit breaker equipment in river basin power plants, the measurement of switch contact stroke is a key link affecting the performance of the arc-extinguishing chamber, and its measurement accuracy and efficiency directly determine the quality of maintenance. Existing measurement methods generally rely on traditional tools such as vernier calipers and rulers, which have the following significant drawbacks: Traditional measuring tools lack dedicated support structures and are only fixed by simple brackets or handheld devices, making them susceptible to operational posture, leading to measurement benchmark shifts and introducing systematic errors. This is especially true in complex maintenance environments where variations in ground flatness exacerbate support instability and further amplify measurement deviations. The horizontal calibration of existing equipment largely depends on manual visual adjustment, lacking a structured horizontal adjustment mechanism, making it difficult to quickly achieve high-precision horizontal positioning. Horizontal deviations directly cause the distance measurement direction to be non-perpendicular to the contact movement trajectory, resulting in distorted travel data. Traditional tools are mostly single-point distance measurements, failing to cover the travel characteristics of switch contacts in different orientations. Since contact movement may involve radial offset or multi-angle displacement, single-point measurements are prone to missing key data, leading to incomplete assessments of contact travel. The height and horizontal adjustment of existing support structures are mostly split designs, requiring point-by-point adjustments and making synchronous linkage difficult. This is time-consuming and inconsistent, severely impacting maintenance efficiency, especially in field or complex maintenance scenarios.

[0003] The aforementioned problems make it difficult for existing measurement methods to meet the high-precision maintenance requirements of gas circuit breaker (GCB) equipment arc-extinguishing chambers. There is an urgent need for a dedicated measurement device with multi-dimensional measurement capabilities, adaptive support adjustment, and high-precision level calibration to address the shortcomings of traditional tools in terms of stability, comprehensiveness, and convenience, and improve the standardization level of GCB maintenance. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a device for measuring the contact travel of a switch, which further improves the anti-interference capability of the overall structure and effectively eliminates the human error and tilting error of traditional tools; the quick disassembly and assembly design shortens the assembly and storage time of the device and improves maintenance efficiency; the modular design allows each component to be disassembled and stored, reducing the space occupied and facilitating transportation in complex environments such as power plant sites.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a device for measuring the contact stroke of a switch, including a measuring plate, wherein the measuring plate is provided with a plurality of extensions evenly distributed around the center position of the measuring plate, the measuring plate is provided with a level and a plurality of distance measuring structures, and the bottom of the measuring plate is an adjustable support structure.

[0006] The adjustable support structure includes a base located at the center of the bottom of the measuring plate. A threaded rod and multiple limiting grooves corresponding to the extension are fixedly connected to the base. The limiting grooves are fixedly connected to the bottom of the base. A limiting slide head that cooperates with the limiting slide head is provided in the limiting groove. A support cylinder is provided at the bottom of the limiting slide head. A first connecting seat is provided on the support cylinder. The first connecting seat is hinged to one end of the adjusting arm. The other end of the adjusting arm is hinged to a second connecting seat provided on the outer ring of the bearing. The outer ring of the bearing is installed in conjunction with the inner ring of the bearing through multiple sets of bearing rollers. The inner ring of the bearing is threadedly engaged with the threaded rod. An operating sleeve is fixedly connected to the bottom of the inner ring of the bearing.

[0007] In a preferred embodiment, the ranging structure includes multiple first laser ranging sensors, which are evenly distributed in a ring around the level on the measuring plate.

[0008] In a preferred embodiment, the ranging structure includes multiple second laser ranging sensors, which are correspondingly coupled with multiple extensions and disposed at the ends of the corresponding extensions.

[0009] In a preferred embodiment, the bottom of the support cylinder is provided with a telescopic rod that is sleeved thereon, and the telescopic rod is fixed in conjunction with a fastening sleeve provided at the end of the support cylinder.

[0010] In a preferred embodiment, the inner wall of the support cylinder is provided with guide protrusions distributed along its length, and the outer wall of the telescopic rod is provided with guide grooves that cooperate with the guide protrusions.

[0011] In a preferred embodiment, the bottom of the telescopic rod is a pointed bottom.

[0012] In a preferred embodiment, the bottom of the operating sleeve is provided with an anti-slip toothed sleeve.

[0013] In a preferred embodiment, there are at least three extensions.

[0014] In a preferred embodiment, the level is provided with a transparent protective cover, which is detachably connected to the measuring plate, and the edge of the protective cover is provided with a sealing ring.

[0015] In the preferred embodiment, the outer ring of the bearing, the multiple sets of bearing rollers, and the inner ring of the bearing are all made of wear-resistant alloy material, and the surfaces of the multiple sets of bearing rollers are coated with lubricating grease.

[0016] The device for measuring the travel of a switch contact provided by this utility model has the following advantages by adopting the above-described structure:

[0017] (1) Further enhance the anti-interference capability of the overall structure and effectively eliminate the human error and tilting error of traditional tools;

[0018] (2) Quick disassembly and assembly design shortens the assembly and storage time of the device and improves maintenance efficiency;

[0019] (3) The modular design allows each component to be disassembled and stored, reducing space occupation and facilitating handling in complex environments such as power plant sites. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the adjustable support structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the bearing part of this utility model.

[0025] In the figure: measuring plate 1, extension 2, level 3, first laser rangefinder 4, second laser rangefinder 5, base 6, limiting groove 7, threaded rod 8, limiting slide head 9, support cylinder 10, telescopic rod 11, fastening sleeve 12, first connecting seat 13, adjusting arm 14, bearing outer ring 15, second connecting seat 16, bearing roller 17, bearing inner ring 18, operating sleeve 19, anti-slip toothed sleeve 20. Detailed Implementation

[0026] Example 1:

[0027] like Figure 1-4 Among them, a device for measuring the contact stroke of a switch includes a measuring plate 1, which is made of aluminum alloy plate with a thickness of 5mm and has an overall equilateral triangular structure. Three extensions 2 are provided around the center of the measuring plate 1 at its edge. The included angle between adjacent extensions is 120° to ensure the overall force balance of the device. A level 3 is embedded in the center of the upper surface of the measuring plate 1, and multiple distance measuring structures are installed on the outside of the level 3 and on the extensions 2. An adjustable support structure is fixed to the bottom of the measuring plate 1 by bolts to realize the height adjustment and level calibration of the device.

[0028] The adjustable support structure includes a base 6 welded and fixed to the center of the bottom of the measuring plate 1. The base is made of steel plate with a thickness of 8mm. An M16 threaded rod 8 is vertically welded to the center of the upper surface of the base 6. Three limiting grooves 9, corresponding one-to-one with the extension 2, are evenly distributed along the circumference of the base 6. The grooves are made of Q235 steel and bent, with a groove width of 3cm. The limiting grooves 7 are fixedly connected to the bottom of the base 6 by bolts. A support cylinder 10 made of aluminum alloy round tube with a diameter of 5cm is mounted on the limiting slide head 9 on the limiting groove 7. The middle of the outer wall of the support cylinder 10 is welded The first connecting seat 13 is made of cast steel. The first connecting seat 13 is hinged to one end of the adjusting arm 14, which is a 4mm thick spring steel sheet, via a pin. The other end of the adjusting arm 14 is hinged to the second connecting seat 16, which is set on the outer ring 15 of the bearing, via a pin. The outer ring 15 of the bearing is installed with the inner ring 18 of the bearing via 6 sets of bearing rollers 17, each set consisting of 3 rollers with a diameter of 8mm. The inner wall of the inner ring 18 of the bearing is machined with internal threads, which are threaded to the threaded rod 8. The bottom of the inner ring 18 of the bearing is fixed with an operating sleeve 19, which is made of PVC material and injection molded, with a height of 6cm.

[0029] like Figure 1 and 2 In the preferred embodiment, the ranging structure includes three first laser ranging sensors 4, model LDM4X, with a measuring range of 0.05-30m and an accuracy of ±0.1mm. The multiple first laser ranging sensors 4 are evenly distributed in a ring around the level 3 along a circle with a radius of 10cm on the measuring plate 1. The sensors are fixed to the measuring plate 1 by M4 screws, and the detection direction is perpendicular to the surface of the measuring plate 1.

[0030] like Figure 1 and 2 In the preferred embodiment, the ranging structure includes three second laser ranging sensors 5 of the same model as the first laser ranging sensor 4. The multiple second laser ranging sensors 5 are matched one-to-one with the three extensions 2 and are fixed to the end positions of the corresponding extensions 2 by a special bracket. Their detection direction is parallel to that of the first laser ranging sensor 4, and can cover the edge area of ​​the contact movement.

[0031] like Figure 3 In a preferred embodiment, the bottom of the support cylinder 10 is provided with a telescopic rod 11 that is sleeved with it. The telescopic rod 11 is made of aluminum alloy round tube with a diameter of 4.8cm and a length of 30cm. The telescopic rod 11 is fixed with a fastening sleeve 12 made of nylon material at the end of the support cylinder 10. The inner wall is provided with anti-slip texture. The height of the telescopic rod 11 can be locked by tightening the fastening sleeve 12.

[0032] like Figure 3In the preferred embodiment, the inner wall of the support cylinder 10 is provided with three guide protrusions distributed along its length direction, the cross-section of which is an isosceles triangle and the height is 3mm. The outer wall of the telescopic rod 11 is provided with a guide groove that cooperates with the guide protrusions to ensure that the telescopic rod 11 does not rotate relative to the guide protrusions when it extends or retracts.

[0033] like Figure 3 In the preferred embodiment, the bottom of the telescopic rod 11 is a pointed bottom made of 45 steel with a quenching treatment and a cone angle of 30°, which can be inserted into the gap of the ground or maintenance platform to enhance the stability of the device placement.

[0034] like Figure 4 In the preferred embodiment, the bottom of the operating sleeve 19 is provided with an anti-slip toothed sleeve 20 made of nitrile rubber with a thickness of 3mm. The surface of the toothed sleeve is machined with anti-slip teeth with a depth of 2mm and a spacing of 5mm, which can increase the friction of the hand and facilitate rotation operation.

[0035] like Figure 1 and 2 In the preferred embodiment, there are no fewer than three extensions 2. In this embodiment, three extensions 2 are used. Each extension 2 is 20cm long and 5cm wide. They are integrally formed with the measuring plate 1 to form a stable triangular support structure and improve the overall rigidity of the device.

[0036] like Figure 1 In the preferred embodiment, the level 3 is provided with a transparent protective cover made of 2mm thick acrylic sheet. The protective cover is detachably connected to the measuring plate 1 by 4 stainless steel screws. The edge of the protective cover is provided with a silicone rubber sealing ring with a cross-sectional diameter of 3mm, which can achieve an IP54 dustproof and waterproof rating, protecting the level from the influence of the maintenance environment.

[0037] like Figure 4 In the preferred embodiment, the outer bearing ring 15, the multiple sets of bearing rollers 17, and the inner bearing ring 18 are all made of wear-resistant alloy material. The surfaces of the multiple sets of bearing rollers 17 are coated with molybdenum disulfide grease with a temperature range of -40~120℃, which can reduce the coefficient of friction and ensure the long-term stable operation of the bearing assembly.

[0038] Example 2:

[0039] like Figure 1-4The working principle of this utility model is as follows: After the device is placed, the rotating operating sleeve 19 drives the inner ring 18 of the bearing to rise and fall along the threaded rod 8. The inner ring 18 drives the outer ring 15 of the bearing to move synchronously through the bearing roller 17, thereby causing the adjusting arm 14 to push the limiting slide head 9 on the support cylinder 10 to slide along the limiting slide groove 7, realizing the synchronous extension and retraction of multiple support points. With the help of the level 3 on the measuring plate 1, the device can be quickly adjusted to a horizontal state to ensure that the distance measuring direction is perpendicular to the movement trajectory of the contact. The pointed design at the bottom of the telescopic rod 11 enhances the ground grip, and its outer wall guide groove cooperates with the inner wall guide protrusion of the support cylinder 10 to prevent rotation during extension and retraction, ensuring the stability of the support.

[0040] During measurement, the first laser rangefinder 4 is arranged in a ring around the level 3, collecting distance data in real time at different radial positions of the contact and capturing radial offset; the second laser rangefinder 5 is located at the end of the extension 2, focusing on the axial motion trajectory and accurately measuring the axial travel. The two types of sensors work synchronously, and by integrating the data, they reconstruct the three-dimensional motion state of the contact, overcoming the limitations of traditional single-point measurement.

[0041] After calibration, the sensor is aligned with the contact measurement point. When the switch is operated to open or close, the first laser ranging sensor 4 and the second laser ranging sensor 5 record the distance change at a high frequency and calculate the travel value by "initial distance - real-time distance".

[0042] The beneficial effects of this utility model are: further enhancing the anti-interference capability of the overall structure and effectively eliminating human error and tilting error of traditional tools; the quick disassembly and assembly design shortens the assembly and storage time of the device and improves maintenance efficiency; the modular design allows each component to be disassembled and stored, reducing the space occupied and facilitating transportation in complex environments such as power plant sites.

Claims

1. A device for measuring the travel of a switch contact comprising a measuring plate (1), characterised in that: The measuring plate (1) It is provided with multiple extensions (2) evenly distributed around the center of the measuring plate (1), and the measuring plate (1) is provided with a level (3) and multiple distance measuring structures, and the bottom of the measuring plate (1) is an adjustable support structure. The adjustable support structure includes a base (6) located at the middle of the bottom of the measuring plate (1). A threaded rod (8) and multiple limiting grooves (7) corresponding to the extension (2) are fixedly connected to the base (6). The limiting grooves (7) are fixedly connected to the bottom of the base (6). A limiting slide head (9) is provided in the limiting groove (7) to cooperate with it. A support cylinder (10) is provided at the bottom of the limiting slide head (9). A first connecting seat (13) is provided on the support cylinder (10). One end of the first connecting seat (13) is hinged to one end of the adjusting arm (14). The other end of the adjusting arm (14) is hinged to a second connecting seat (16) provided on the outer ring (15) of the bearing. The outer ring (15) of the bearing is installed with the inner ring (18) of the bearing through multiple sets of bearing rollers (17). The inner ring (18) of the bearing is threadedly engaged with the threaded rod (8). An operating sleeve (19) is fixedly connected to the bottom of the inner ring (18).

2. A device for measuring the travel of a switch contact according to claim 1, characterized in that: The ranging structure includes multiple first laser ranging sensors (4), which are evenly distributed in a ring around the level (3) on the measuring plate (1).

3. A device for measuring the throw of a switch contact according to claim 1, characterized in that: The ranging structure includes multiple second laser ranging sensors (5), which are correspondingly matched with multiple extensions (2) and are located at the end of the corresponding extensions (2).

4. A device for measuring the throw of a switch contact according to claim 1, characterized in that: The bottom of the support cylinder (10) is provided with a telescopic rod (11) that is sleeved thereon, and the telescopic rod (11) is fixed in conjunction with the fastening sleeve (12) provided at the end of the support cylinder (10).

5. A device for measuring the throw of a switch contact according to claim 1, characterized in that: The inner wall of the support cylinder (10) is provided with guide protrusions distributed along its length, and the outer wall of the telescopic rod (11) is provided with guide grooves that cooperate with the guide protrusions.

6. A device for measuring the travel of a switch contact according to claim 4, characterized in that: The bottom of the telescopic rod (11) is a pointed bottom.

7. A device for measuring the throw of a switch contact according to claim 1, characterized in that: The bottom of the operating sleeve (19) is provided with an anti-slip toothed sleeve (20).

8. A device for measuring the throw of a switch contact according to claim 1, characterized in that: The plurality of extensions (2) shall be no less than three.

9. A device for measuring the throw of a switch contact according to claim 1, characterized in that: The level (3) is provided with a transparent protective cover, which is detachably connected to the measuring plate (1), and the edge of the protective cover is provided with a sealing ring.

10. The device for measuring the travel of a switch contact according to claim 1, characterized in that: The outer bearing ring (15), multiple sets of bearing rollers (17) and the inner bearing ring (18) are all made of wear-resistant alloy material, and the surfaces of the multiple sets of bearing rollers (17) are coated with lubricating grease.

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