A mobile testing vehicle for clamping force of disconnecting switches

Abstract

This invention discloses a mobile testing cart for disconnecting switch clamping force. The cart includes a movable frame and a clamping force testing device connected to the movable frame. The clamping force testing device includes a rotatable base, a connecting frame, a rotary joint, and multiple clamping force testing rods. The connecting frame is connected to the movable frame via the rotatable base and has an upper mounting end and a lower mounting end. A space for mounting the clamping force testing rods is formed between the upper and lower mounting ends. One end of each clamping force testing rod is connected to the upper mounting end, and the other end is connected to the lower mounting end via the rotary joint. This mobile testing cart for disconnecting switch clamping force facilitates testing of different models of disconnecting switches on the same device. Different clamping force testing rods are used to test different models of disconnecting switches and can deflect at any angle as the disconnecting switch clamps hold the switch, eliminating the need to change the testing device.

Description

Technical Field

[0001] This invention relates to the field of disconnector switch technology, and in particular to a disconnector switch clamping force movement test vehicle. Background Technology

[0002] With the rapid development of power systems, the requirements for power grid safety, reliability, and the automation level of electrical switchgear are constantly increasing. High-voltage disconnect switches, as important high-voltage transmission equipment, are widely used in power systems. Their failure can cause incalculable losses to the power system. Therefore, the testing of high-voltage disconnect switches is particularly important. The control of key quality points in high-voltage disconnect switches directly affects the safe operation of the entire power grid, and clamping force is one of the important quality parameters of high-voltage disconnect switches.

[0003] Currently, the clamping force test of high-voltage disconnect switches is conducted using either handheld testing or fixed-position testing. Handheld testing involves manually inserting the testing rod into the clamping position of the disconnect switch, and then performing the test, reading, and recording after closing the switch. Fixed-position testing involves fixing the clamping force testing equipment in the corresponding position.

[0004] Handheld testing relies too heavily on operator experience, placing excessive demands on new operators. Consistent clamping positions are difficult to guarantee, leading to decreased production efficiency and a loss of crucial stability in product testing. Inaccurate clamping force data can result in two scenarios: 1. Excessive clamping force: This causes the silver plating at the contact point between the switch and the stationary contact to wear off at a rate far exceeding the designed lifespan. Failure of the silver plating will affect the current flow and heating of the high-voltage disconnector. 2. Insufficient clamping force: This can lead to poor contact between the switch and the stationary contact after closing. Unlike household appliances, poor contact is extremely dangerous in high-voltage circuits, potentially causing the contact area to break down directly into air, releasing excessive heat and burning out the switch and stationary contact. Furthermore, the handheld clamping force test requires one operator to hold the test rod, while the closing operation of the high-voltage disconnector requires another, making the testing complex and cumbersome, resulting in low actual production efficiency and hindering the widespread adoption of this assembly method.

[0005] The fixed-station testing method suffers from the problem that the clamping jaws of the disconnector switch cannot be basically perpendicular to the clamping force test rod, resulting in overly large test data and low test accuracy. Moreover, the clamping force test rod in the fixed station needs to be replaced every time the product is changed, or a dedicated area needs to be set up for each product model. This solution is costly, has poor adaptability, and is not conducive to industry promotion. Therefore, a new solution is needed that avoids the disadvantages of the two methods as much as possible.

[0006] In view of this, it is necessary to propose a test vehicle for the clamping force of disconnecting switches to solve the above-mentioned defects. Summary of the Invention

[0007] The main objective of this invention is to provide a mobile testing vehicle for the clamping force of disconnecting switches, which aims to solve the problems of complex operation, low testing accuracy, and poor adaptability of existing testing solutions.

[0008] To achieve the above objectives, the present invention provides a mobile testing vehicle for the clamping force of disconnecting switches, comprising a movable frame and a clamping force testing device connected to the movable frame. The clamping force testing device includes a rotatable base, a connecting frame, a rotary joint, and a plurality of clamping force testing rods. The connecting frame is connected to the movable frame via the rotatable base. The connecting frame has an upper mounting end and a lower mounting end, and an installation space for mounting the clamping force testing rods is formed between the upper mounting end and the lower mounting end at an interval. Each clamping force testing rod is respectively disposed at a plurality of positions on the connecting frame, and one end of each clamping force testing rod is connected to the upper mounting end, and the other end is connected to the lower mounting end via the rotary joint.

[0009] Preferably, the connecting frame includes an upper crossbar and a lower crossbar spaced apart, and a support rod fixedly connected between the upper crossbar and the lower crossbar, with both ends of each clamping force test rod connected to the upper crossbar and the lower crossbar respectively.

[0010] Preferably, the rotatable base includes a connector connected to the movable frame, a screw connected to the connector, and a nut, with one end of the screw away from the connector passing through the lower crossbar, and the nut being fastened to the screw.

[0011] Preferably, the connector is a flange.

[0012] Preferably, there are two clamping force testing rods, which are respectively located on both sides of the support rod.

[0013] Preferably, one end of the rotary joint is fixed to the upper crossbar by a pin, one end of the clamping force test rod is provided with a mounting hole, and the other end of the rotary joint is inserted into the mounting hole and connected to the clamping force test rod.

[0014] Preferably, the rotary joint is a universal joint or a fisheye joint.

[0015] Preferably, the movable frame includes a working platform, a fixed support, and rolling wheels disposed under the fixed support. The working platform is disposed on the fixed support, and the clamping force testing device is fixed on the working platform.

[0016] Preferably, the clamping force testing rod includes a pressing plate, a pressure guide plate, and a pressure sensor. The pressing plate and the pressure guide plate can be assembled into one unit, and the pressure sensor is located between the pressing plate and the pressure guide plate.

[0017] Preferably, the clamping force testing device further includes an elastic buffer ring, which is sleeved on one end of the clamping force testing rod connected to the lower crossbar, and the clamping force testing rod and the lower crossbar are connected by the elastic buffer ring to mitigate the impact force.

[0018] Compared with the prior art, the disconnector clamping force moving test vehicle provided by the present invention has the following beneficial effects:

[0019] The present invention provides a mobile testing cart for disconnector clamping force. By mounting the clamping force testing device on a movable frame, the entire testing cart can be moved freely according to the testing location, greatly improving testing efficiency, eliminating the need for manual handling, and reducing labor costs. The rotatable base drives the connecting frame to rotate, adapting to the positions of disconnectors at various angles, facilitating the testing of different models of disconnectors on the same testing cart. With multiple clamping force testing rods positioned on the connecting frame, only the corresponding angle needs to be rotated when testing different models of disconnectors, making operation convenient. The clamping force testing rods are connected to the connecting frame via a rotary joint, allowing them to deflect freely as the disconnector clamps hold them during testing, resulting in high testing accuracy. This solves the problem of low testing accuracy caused by the difficulty in ensuring the test rod is perpendicular to the clamp jaws in fixed-position testing methods compared to handheld testing methods. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the disconnector switch clamping force moving test vehicle provided by the present invention for testing disconnector switches;

[0022] Figure 2 for Figure 1 The diagram shows the structure of the test vehicle for moving the clamping force of the disconnector switch.

[0023] Figure 3 for Figure 2 The diagram shows the structure of the clamping force testing device.

[0024] Figure 4 for Figure 3 The diagram shows a partial structural diagram of the clamping force test rod.

[0025] Figure 5 for Figure 3 The diagram shown is an exploded view of the clamping force test rod.

[0026] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0031] Please see Figure 1 and Figure 2This invention provides a mobile testing vehicle for the clamping force of disconnecting switches. This mobile testing vehicle is used to test high-voltage disconnecting switches 100. The mobile testing vehicle includes a movable frame 1 and a clamping force testing device 3 connected to the movable frame 1. The clamping force testing device 3 includes a rotatable base 31, a connecting frame 33, a rotary joint 35, and a clamping force testing rod 37. The connecting frame 33 is connected to the movable frame 1 via the rotatable base 31. The connecting frame 33 has an upper mounting end 32 and a lower mounting end 34. An installation space for mounting the clamping force testing rod 37 is formed between the upper mounting end 32 and the lower mounting end 34. Each clamping force testing rod 37 is installed at multiple positions on the connecting frame 33, with one end of each rod connected to the upper mounting end 32 and the other end connected to the lower mounting end 34 via the rotary joint 35. By installing the clamping force testing device 3 on the movable frame 1, the entire test vehicle can be moved freely according to the test location, greatly improving testing efficiency. It eliminates the need for manual handling and the need for multiple personnel to cooperate in testing, as required by handheld testing solutions, thus reducing labor costs. The rotatable base 31 drives the connecting frame 33 to rotate, accommodating disconnecting switches located in different positions. This facilitates testing different models of disconnecting switches on the same test vehicle. Furthermore, clamping force testing rods 37 are installed at multiple positions on the connecting frame 33. Different clamping force testing rods 37 are used to test different models of disconnecting switches. When testing different disconnecting switches, only the corresponding angle needs to be rotated to assemble the disconnecting switch with the clamping force testing rod 37, eliminating the need to change the test vehicle and making it more convenient to use. The rotating joint 35 connects the clamping force testing rod 37 to the connecting frame 33, allowing the clamping force testing rod 37 to deflect. It can deflect at any angle as the disconnecting switch clamps hold it, resulting in high testing accuracy. This solves the problem of low testing accuracy caused by the fixed platform solution failing to ensure the test rod is perpendicular to the clamp jaws.

[0032] Please see Figure 2 Specifically, in this embodiment, the movable frame 1 includes a working platform 11, a fixed support 13, and rolling wheels 15 disposed under the fixed support 13. The working platform 11 is mounted on the fixed support 13, and the clamping force testing device 3 is fixed to the working platform 11. The rolling wheels 15 drive the fixed support 13 to move, allowing the entire testing vehicle to be moved freely according to the testing location, which greatly improves testing efficiency. It eliminates the need for manual handling and the need for multiple personnel to cooperate in testing, as required by handheld testing solutions, thus reducing labor costs and making it convenient to use.

[0033] Please see Figure 3Specifically, in this embodiment, the connecting frame 33 is I-shaped and includes an upper crossbar 331 and a lower crossbar 333 arranged parallel and spaced apart, and a support rod 335 fixedly connected between the upper crossbar 331 and the lower crossbar 333. The support rod 335 is located at the middle position of the upper crossbar 331 and the lower crossbar 333. The two ends of the clamping force testing rod 37 are respectively connected to the upper crossbar 331 and the lower crossbar 333. The clamping force testing rod 37 is located on both sides of the support rod 335. The support rod 335 consists of two vertically arranged rods, vertically arranged between the upper crossbar 331 and the lower crossbar 333. Further, there are two clamping force testing rods 37, with the two clamping force testing rods 37 respectively located on both sides of the support rod 335. Driven by the rotatable base 31, the clamping force test rod 37 can change its angle to adapt to different positions and different models of disconnecting switches.

[0034] It should be noted that in this embodiment, the connecting frame 33 is in the shape of an I-beam. Of course, in other embodiments, the connecting frame 33 can also be in the shape of a cross or a star, which can accommodate more disconnector switch models.

[0035] Specifically, in this embodiment, the rotatable base 31 includes a connector 311 connected to the movable frame 1, a screw 313 connected to the connector 311, and a nut 315 mounted on the screw 313. One end of the screw 313 away from the connector 311 passes through the lower crossbar 333, and the nut 315 is securely connected to the screw 313. Preferably, the connector 311 is a flange. One end of the screw 313 is connected to the flange, and the other end of the screw 313 passes through the bottom of the lower crossbar 333 to connect the connecting frame 33 to the rotatable base 31. Loosening the nut 315 allows adjustment and rotation of the direction of the connecting frame 33. After determining the position, tightening the nut 315 secures the connecting frame 33.

[0036] It is worth mentioning that the rotatable base 31 can be equipped with an electrical slip ring structure, so that all the clamping force test rods 37 can be clustered at the position of the screw 313, without being exposed on the outside and with a sufficiently long test line to ensure that the tester does not move when rotating. This allows for the design of hidden wiring, resulting in a more aesthetically pleasing overall appearance.

[0037] In other embodiments, the rotatable base 31 can be a cylinder or a hydraulic cylinder, or a structure such as a plane bearing can be added to further eliminate the height deviation caused by the threaded structure. The clamping position deviation of 1 to 2 thread pitches is much smaller than the detection standard value. The screw 313 selected in this embodiment can fully achieve the test accuracy.

[0038] Please see Figure 4 Furthermore, one end of the rotary joint 35 is fixed to the upper crossbar 331 by a pin 5, and one end of the clamping force testing rod 37 has a mounting hole. The other end of the rotary joint 35 is inserted into the mounting hole and connected to the clamping force testing rod 37. The rotary joint 35 is either a universal joint or a fisheye joint. Preferably, in this embodiment, the rotary joint 35 is a fisheye joint. Specifically, the pin 5 is horizontally mounted on the upper crossbar 331, and the pin 5 passes through the fisheye of the fisheye joint. The fisheye joint can rotate a certain angle around the centerline of the pin 5. Thus, the clamping force testing rod 37 connected to the fisheye joint can be driven to rotate by the required angle in the axial and radial directions, thereby adjusting the deflection angle of the clamping force testing rod 37 to adapt to the position of the disconnecting switch.

[0039] The rotary joint 35 can also be made of a flexible material, such as a rope. One end of the rope is connected to the upper crossbar 331, and the other end is connected to the clamping force testing rod 37. The rope can also change its angle to adapt to the testing direction. Of course, this method is suitable for situations where manufacturing costs are low and testing accuracy requirements are low.

[0040] Please see Figure 5 Specifically, in this embodiment, the clamping force testing rod 37 includes a compression plate 371, a pressure guide plate 373, and a pressure sensor 375. The compression plate 371 and the pressure guide plate 373 can be assembled into one unit, and the pressure sensor 375 is disposed between the compression plate 371 and the pressure guide plate 373. The compression plate 371 and the pressure guide plate 373 are two semi-cylinders with one side flat, formed by splitting the clamping force testing rod 37 in two. The two flat surfaces of the compression plate 371 and the pressure guide plate 373 are joined together and assembled into one unit by a height-equal sleeve 377. The pressure sensor 375 is disposed between the two flat surfaces. When the compression plate 371 and the pressure guide plate 373 are subjected to external compressive force, the pressure sensor 375 is deformed by the compression, and the clamping force value is transmitted to the isolating switch pressure tester through a signal line.

[0041] The clamping force testing device 3 further includes an elastic buffer ring 7, which is sleeved on one end of the clamping force testing rod 37 connected to the lower crossbar 333. The clamping force testing rod 37 and the lower crossbar 333 are connected by the elastic buffer ring to mitigate the impact force. The elastic buffer ring isolates the clamping force testing rod 37 and the lower crossbar 333. When the clamp of the high-voltage disconnecting switch clamps the clamping force testing rod 37, a certain impact force is generated, and the clamping force testing rod 37 and the lower crossbar 333 will collide. The elastic buffer ring 7 mitigates the force between the clamping force testing rod 37 and the lower crossbar 333 through its own elasticity, thereby forming a flexible connection between the clamping force testing rod 37 and the lower crossbar 333.

[0042] It should be noted that the elastic buffer ring is made of a flexible and elastic material, specifically a rubber ring or a ring formed by compressing cotton.

[0043] The mobile test vehicle for disconnecting switch clamping force provided by the present invention can move the entire test vehicle at will according to the test location by setting the clamping force test device 3 on the movable frame 1, which can greatly improve the test efficiency, eliminate the need for manual handling, and eliminate the need for multiple personnel to cooperate in testing as required by handheld testing solutions, thereby reducing labor costs. The rotatable base 31 drives the connecting frame 33 to rotate, accommodating disconnecting switches in different positions and facilitating testing of different models of disconnecting switches on the same equipment. Furthermore, multiple clamping force test rods 37 are positioned on the connecting frame 33, with different rods used to test different models of disconnecting switches. When testing different disconnecting switches, simply rotating the rod by the corresponding angle aligns the disconnecting switch with the clamping force test rod 37, eliminating the need to change equipment and making it more convenient. The rotating joint 35 connects the clamping force test rod 37 to the connecting frame 33, allowing it to deflect at any angle as the disconnecting switch clamps hold it, resulting in high testing accuracy. This solves the problem of low testing accuracy caused by the fixed platform design failing to ensure the test rod is perpendicular to the clamp jaws.

[0044] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. An isolating switch clamping force movement test car, characterized by, The device comprises a movable frame and a clamping force testing device connected to the movable frame, the clamping force testing device comprises a rotatable base, a connecting frame, a rotary joint and a plurality of clamping force testing rods, the connecting frame is connected to the movable frame through the rotatable base, the connecting frame has an upper mounting end and a lower mounting end, an installation space for mounting the clamping force testing rods is formed between the upper mounting end and the lower mounting end, each clamping force testing rod is arranged at a plurality of positions of the connecting frame, and one end of each clamping force testing rod is connected to the lower mounting end, and the other end is connected to the upper mounting end through the rotary joint.

2. The disconnector contact force movement test car according to claim 1, characterized in that The connecting frame comprises an upper cross bar and a lower cross bar arranged at intervals, and a support rod fixedly connected between the upper cross bar and the lower cross bar, and two ends of each clamping force testing rod are connected to the upper cross bar and the lower cross bar respectively.

3. The disconnector contact force movement test car according to claim 2, characterized in that The rotatable base comprises a connecting piece connected to the movable frame, a screw rod connected to the connecting piece, and a nut, one end of the screw rod away from the connecting piece penetrates through the lower cross bar, and the nut is fastened to the screw rod.

4. The disconnector contact force movement test car according to claim 3, characterized in that The connecting piece is a flange.

5. The isolating switch clamp force movement test car of claim 2, wherein, The clamping force testing rods are two, and the two clamping force testing rods are arranged on both sides of the support rod respectively.

6. The disconnector grip force movement test car according to claim 2, characterized in that One end of the rotary joint is fixed to the upper cross bar through a pin shaft, one end of the clamping force testing rod is provided with a mounting hole, and the other end of the rotary joint is inserted into the mounting hole to be connected to the clamping force testing rod.

7. The isolating switch clamp force movement test car of claim 1, wherein, The rotary joint is a universal joint or a fish eye joint.

8. The isolating switch clamp force movement test car of claim 1, wherein, The movable frame comprises a working platform, a fixed support and a rolling wheel arranged under the fixed support, the working platform is arranged on the fixed support, and the clamping force testing device is fixed to the working platform.

9. The isolating switch clamp force movement test car of claim 1, wherein, The clamping force testing rod comprises an extrusion plate, a pressure guide plate and a pressure sensor, the extrusion plate and the pressure guide plate can be assembled into one body, and the pressure sensor is arranged between the extrusion plate and the pressure guide plate.

10. The disconnector contact force movement test car according to any one of claims 2-6, characterized in that, The clamping force testing device further comprises an elastic buffer ring, the elastic buffer ring is sleeved on one end of the clamping force testing rod connected to the lower cross bar, and the clamping force testing rod and the lower cross bar are relieved from impact force through the elastic buffer ring.

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