Multifunctional lower disconnect switch performance testing fixture

Abstract

This utility model relates to the field of power equipment testing technology, and in particular to a multifunctional performance testing fixture for disconnecting switches. It includes a mounting plate, side plates, reinforcing ribs, a guide rail fixing mounting plate, a first guide rail, a second guide rail, a slider, a slider fixing plate, a switch support plate, a third guide rail, and a disconnecting switch. The mounting plate is welded to the side plates and reinforcing ribs to enhance structural rigidity. The first and second guide rails are arranged parallel to each other to guide the slider to move horizontally. The slider is connected to the switch support plate via the slider fixing plate, forming the bottom support structure of the disconnecting switch. The upper end of the disconnecting switch passes through the third guide rail and can slide axially, forming a cross constraint with the lower guide rail to effectively prevent horizontal swinging or torsion. This utility model has a stable structure, is easy to install, and can improve the positioning accuracy and testing efficiency during disconnecting switch testing. It is suitable for performance testing needs of disconnecting switches of various specifications.

Description

Technical Field

[0001] This utility model relates to the field of power equipment testing technology, and in particular to a multifunctional lower disconnector performance testing fixture. Background Technology

[0002] A disconnector switch is a high-voltage electrical device commonly used in power systems. It is primarily used to isolate and connect circuits when there is no load current. Due to its complex operating environment, high voltage level, and stringent insulation requirements, it must undergo rigorous performance testing before leaving the factory to ensure its mechanical stability, electrical reliability, and installation accuracy.

[0003] Currently, most testing methods for disconnecting switches rely on manual assistance or the use of general-purpose fixtures for clamping and movement. These fixtures often have poor versatility, are cumbersome to install, and the disconnecting switch is prone to swaying or twisting during testing, affecting the accuracy and repeatability of the test. In addition, the existing tooling structure lacks sufficient rigidity, making it difficult to ensure stable support and high-precision guidance of the disconnecting switch during testing, especially in simulated multi-directional load or displacement tests, where positioning deviations are prone to occur, affecting the measurement results.

[0004] Therefore, there is an urgent need for a multifunctional testing fixture that is structurally stable, has high guiding accuracy, is easy to operate, and is highly adaptable, in order to improve the efficiency and accuracy of performance testing of lower disconnect switches. Summary of the Invention

[0005] The purpose of this invention is to provide a multifunctional testing fixture for the performance of disconnect switches, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a multifunctional lower disconnect switch performance testing fixture, including a mounting plate, a guide rail fixing seat mounting plate, a first guide rail, a second guide rail, a slider, a slider fixing plate, a switch support plate, a third guide rail, and a disconnect switch.

[0007] According to the above technical solution, the first guide rail and the second guide rail are arranged in parallel and fixedly installed between the guide rail fixing seats on the guide rail fixing seat mounting plate, which is used to support and guide the slider to move in the horizontal direction.

[0008] According to the above technical solution, the slider is sleeved on the first guide rail and the second guide rail. The upper end of the slider is fixedly connected to the slider fixing plate by bolts, and the lower part of the slider fixing plate is locked to the switch support plate by a flat keyway.

[0009] According to the above technical solution, the switch plate is used to install the disconnect switch. The top of the switch plate is provided with a mounting groove that matches the housing of the disconnect switch, and the disconnect switch is fixed to the plate with screws.

[0010] According to the above technical solution, the upper end of the disconnecting switch is inserted into the third guide rail and can slide along the axial direction of the third guide rail.

[0011] According to the above technical solution, the lower part of the disconnecting switch forms a cross constraint with the first guide rail and the second guide rail to prevent the disconnecting switch from swinging or twisting in the horizontal direction, thereby improving the stability and repeatability of the positioning during the test.

[0012] According to the above technical solution, one end of the first guide rail and the second guide rail are connected to the guide rail fixing seat by bolts and flat keys, and the other end is inserted into the slide rail hole of the mounting plate and positioned. The fit tolerance between the slide rail hole and the outer diameter of the guide rail is controlled within the range of H7 / f7 to ensure the positioning accuracy of the guide rail.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model, through the combination of a first guide rail, a second guide rail, and a third guide rail sliding constraint structure, achieves stable positioning and multi-directional restriction of the disconnecting switch during the testing process, effectively preventing its swing or torsion in the horizontal direction, and improving testing accuracy and safety; the modular connection structure between the slider, the slider fixing plate, and the switch support plate makes the installation and disassembly of the switch more convenient, facilitating quick replacement of the test object and improving testing efficiency; the overall rigid frame design of the mounting plate, reinforcing ribs, and guide rail fixing seat mounting plate enhances the structural stability and service life of the tooling, and can adapt to the installation and performance testing requirements of disconnecting switches of different models; the overall structure of this utility model is reasonable, easy to assemble, and highly compatible, suitable for various disconnecting switch performance testing needs in field and laboratory environments, and has good prospects for promotion and application. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the connection structure between the disconnector and its main components in the multifunctional lower disconnector performance testing fixture proposed in this utility model; Figure 2 This is a schematic diagram of the overall structure of the multifunctional lower disconnector performance testing fixture proposed in this utility model; Figure 3 This is a schematic diagram of the overall structure of the multifunctional lower disconnector performance testing fixture proposed in this utility model from another angle.

[0015] In the diagram: 1 Mounting plate, 2 Side plate, 3 Reinforcing rib, 4 Guide rail fixing seat mounting plate, 41 Guide rail fixing seat, 42 Slider, 43 First guide rail, 44 Second guide rail, 45 Slider fixing plate, 5 Switch support plate, 6 Third guide rail, 7 Isolating switch. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0017] Reference Figure 1-3 A multifunctional performance testing fixture for a lower disconnect switch includes a mounting plate 1, a side plate 2, a reinforcing rib 3, a guide rail fixing base mounting plate 4, a first guide rail 43, a second guide rail 44, a slider 42, a slider fixing plate 45, a switch support plate 5, a third guide rail 6, and a disconnect switch 7. The mounting plate 1 is formed by stamping steel plate, and one side of it is fixedly connected to the side plate 2 by welding. A reinforcing rib 3 is welded to the bottom surface at the lower end of this side to form a fixed connection. This fixed connection is rigid to enhance the spatial rigidity between the side and bottom surfaces of the fixture. Mounting plate 1 has a pair of slide rail holes at its connection with the bottom surface. The diameter of the slide rail holes matches the outer diameter of the first guide rail 43 and the second guide rail 44, with the tolerance controlled within the range of H7 / f7 to ensure the positioning accuracy of the guide rails. The other end of the bottom mounting plate 1 is welded to the guide rail fixing seat mounting plate 4 to form a fixed connection. Two guide rail fixing seats 41 are welded on the guide rail fixing seat mounting plate 4, and the distance between them matches the width of the disconnect switch support plate 5. Each guide rail fixing seat 41 has a through hole that matches the outer diameter of the first guide rail 43 and the second guide rail 44. One end of the guide rail is locked to the guide rail fixing seat 41 by bolt and flat key connection. The other end of the guide rail is respectively inserted into the slide rail hole on the side of the mounting plate 1 and fixed.

[0018] The first guide rail 43 and the second guide rail 44 are arranged parallel to each other to support the reciprocating linear motion of the slider 42 in the horizontal direction. The upper end of the slider 42 is fixedly connected to the slider fixing plate 45 by bolts, and the bottom surface of the slider fixing plate 45 is locked to the switch support plate 5 by a keyway, forming the bottom support structure of the disconnect switch 7. The top of the switch support plate 5 is provided with a mounting groove corresponding to the housing of the disconnect switch 7, and the disconnect switch 7 is fixed by screws.

[0019] The upper end of the disconnect switch 7 is mounted on the third guide rail 6. The disconnect switch 7 can slide left and right along the axis on the third guide rail 6. At the same time, its lower part forms a cross constraint with the first guide rail 43 and the second guide rail 44 to prevent it from swinging or twisting in the horizontal direction. This allows the disconnect switch 7 to make a linear motion with a single degree of freedom in the horizontal direction, thereby ensuring the motion accuracy during the test.

[0020] When using the fixture, first, the disconnector switch 7 to be tested is placed stably in the pre-set mounting groove on the top of the switch support plate 5, ensuring a good fit with the groove, and then locked in place with screws. The upper part of the disconnector switch 7 is guided through the third guide rail 6, and the lower part is connected to the first guide rail 43 and the second guide rail 44 in sequence through the switch support plate 5, the slider fixing plate 45, and the slider 42, forming a horizontal limit for the disconnector switch. After confirming that the horizontal posture of the disconnector switch is stable and there is no back-and-forth or up-and-down swaying, a stroke detection element is installed at the operating part or transmission linkage of the disconnector switch 7 to monitor the extreme positions and process stroke of the switch opening / closing. A force measuring element is installed at the switch support plate 5 or the drive part to record the magnitude of the applied force. All sensor signals are led to the data acquisition terminal through interface cables. After zeroing and debugging, and confirming that the numerical response is normal, the device enters the test state.

[0021] By manually pulling or using an auxiliary drive device, an upward force is applied to the operating end of the disconnecting switch 7 to simulate its breaking action. Under the constraints of the first guide rail 43 and the second guide rail 44, the disconnecting switch 7 maintains a fixed horizontal position, allowing only vertical freedom to move along the support plate 5 to achieve upward breaking. The stroke sensor records the specific position and response time of the switch contact separation, and the force sensor monitors the change in the required force value during the pulling process in real time. The system automatically collects relevant data.

[0022] After the disconnection test is completed, the reverse operation causes the disconnector 7 to fall back to the closed state. Under the constraint of the guide rail system, the disconnector remains horizontally positioned in the support structure. Through the sliding of the first guide rail 43 and the second guide rail 44, in conjunction with the third guide rail 6, a complete guide is formed to ensure that it returns to the initial position along the set trajectory. The stroke and torque signals are collected by the sensor again to ensure that the closing action is smooth and accurate, and to verify the repeatable closing performance of the switch structure.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multifunctional disconnector performance testing fixture, comprising a mounting plate (1), a guide rail fixing base mounting plate (4), a first guide rail (43), a second guide rail (44), a slider (42), a slider fixing plate (45), a switch support plate (5), a third guide rail (6), and a disconnector switch (7), characterized in that: The first guide rail (43) and the second guide rail (44) are arranged in parallel and fixed between the guide rail fixing seat (41) on the guide rail fixing seat mounting plate (4); The slider (42) is sleeved on the first guide rail (43) and the second guide rail (44) and can slide along the horizontal direction. The slider (42) is connected to the switch support plate (5) through the slider fixing plate (45). The switch support plate (5) is used to install the disconnect switch (7), and the upper end of the disconnect switch (7) passes through the third guide rail (6) and can slide along its axial direction. Its lower part is limited by the first guide rail (43) and the second guide rail (44) to form a lateral constraint.

2. The multifunctional lower disconnector performance testing fixture according to claim 1, characterized in that: The mounting plate (1) is fixedly connected to the side plate (2) by welding, and is rigidly connected to the bottom surface by welding with reinforcing ribs (3).

3. The multifunctional lower disconnector performance testing fixture according to claim 1, characterized in that: The guide rail mounting plate (4) is provided with two guide rail fixing seats (41). The guide rail fixing seats (41) have through holes that cooperate with the first guide rail (43) and the second guide rail (44). One end of the guide rail is locked to the guide rail fixing seat (41) by bolt and key connection.

4. The multifunctional lower disconnector performance testing fixture according to claim 1, characterized in that: The bottom surface of the slider fixing plate (45) is locked to the switch support plate (5) by a flat keyway snap-fit.

5. The multifunctional lower disconnector performance testing fixture according to claim 1, characterized in that: The top of the switch plate (5) is provided with a mounting groove that matches the housing of the disconnect switch (7), and the disconnect switch (7) is fixed by screws.

6. The multifunctional lower disconnector performance testing fixture according to claim 1, characterized in that: When the disconnecting switch (7) slides axially on the third guide rail (6), its lower part forms a cross constraint with the second guide rail (44) through the first guide rail (43) to prevent the disconnecting switch from swinging or twisting in the horizontal direction.

7. The multifunctional lower disconnector performance testing fixture according to claim 1, characterized in that: The fit tolerance between the first guide rail (43), the second guide rail (44) and the slide rail hole is controlled within the range of H7 / f7.

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