An integrated testing device and method for elastic contact finger parameter characteristics

Abstract

The present invention discloses an integrated testing device and method for elastic contact finger parameter characteristics, which relates to the field of simulation and experimental testing technology of electrical contact elastic contact fingers. The testing device includes a contact finger mounting part, a pressure component, and a direct resistance component. The contact finger mounting part has an installation station for adapting the contact finger; the pressure component includes a pressure sensor, a pressure head, and a mounting seat. The detection end of the pressure sensor is connected to the pressure head, and the fixed end of the pressure sensor is connected to the mounting seat; the direct resistance component includes a first conductive end and a second conductive end. When the contact finger is installed at the installation station, the contact finger, the first conductive end, and the second conductive end form a series current-carrying path. The testing method applies the testing device. The testing device and method can obtain pressure indicators and resistance indicators after pressure deformation of the contact finger to be tested by arranging the pressure component and the direct resistance component, thereby achieving the purpose of analyzing the parameter characteristics of the contact finger based on these test indicators.

Description

Technical Field

[0001] The present invention relates to the technical field of simulation and experimental testing of elastic contacts of electric contacts of a valve-side bushing of an ultra-high voltage converter transformer, and in particular to an integrated testing device and method suitable for parameter characteristics of elastic contacts. Background Art

[0002] UHV converter substations are a critical component of power transmission. Their safe and reliable operation is crucial for the normal operation of my country's power system. Since the first UHVDC project in China, all current-carrying connections in the valve-side riser area (from the valve-side winding lead to the valve-side bushing) of the UHV converter transformer have utilized elastic electrical contact components (different types of spring strap contacts). A single UHV converter transformer has as many as eight strap contact connections in the riser area, making the quality of these contacts crucial to the normal operation of the converter substation.

[0003] In practice, the main problem is severe connection failure of the elastic electrical contact components (elastic strap contacts) in the valve-side raised seat area of ​​the valve-side sleeve. Specifically, after long-term operation, the DC resistance of the elastic strap contacts, after pressure deformation, exceeds the specified value. However, existing technologies lack the ability to test the parameter characteristics of used and unused contacts.

[0004] In view of this, this application is hereby filed. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated testing device and method suitable for the parameter characteristics of elastic contact fingers. The testing device and method can obtain pressure indicators and resistance indicators after pressure deformation of the contact finger to be tested by arranging a pressure-applying component and a direct resistance component, thereby achieving the purpose of analyzing the parameter characteristics of the contact finger based on these test indicators.

[0006] The embodiment of the present invention is achieved as follows:

[0007] In a first aspect, an integrated testing device suitable for parameter characteristics of elastic contact fingers includes a contact finger mounting member, a pressure-applying assembly, and a direct resistance assembly. The contact finger mounting member has an installation station for adapting the contact finger; the pressure-applying assembly includes a pressure sensor, a pressure head, and a mounting seat. The detection end of the pressure sensor is connected to the pressure head, and the fixed end of the pressure sensor is connected to the mounting seat. The direct resistance assembly includes a first conductive end and a second conductive end. When the contact finger is installed at the installation station, the contact finger, the first conductive end, and the second conductive end together form a series current-carrying path. The mounting seat can move toward or away from the installation station so that the pressure head can squeeze close to or away from the contact finger in the installation station.

[0008] In an optional embodiment, a shape-variable component is further included, wherein the shape-variable component has an elongated end connected to the mounting seat.

[0009] In an optional embodiment, the deformation variable component includes a micrometer and a fixed plate, the measuring end and the fixed end of the micrometer are respectively located on both sides of the fixed plate, and the measuring end of the micrometer forms an extended end.

[0010] In an optional embodiment, a test seat is further included, which includes a base and a back plate mounted on the base, the finger mounting member is mounted on the base, and a sliding assembly is mounted on the back plate. The sliding end of the sliding assembly is connected to the mounting seat and / or the extension end so that the mounting seat can move toward or away from the installation station.

[0011] In an optional embodiment, the sliding assembly includes a guide rail and a slider slidably engaged with the guide rail, and the slider is connected between the mounting seat and the elongated end.

[0012] In an optional embodiment, the contact finger mounting member includes a contact finger base, a contact finger axis and two sets of contact finger end covers, the contact finger base and the base are fixed to each other, the two sets of contact finger end covers are arranged side by side on the contact finger base, the contact finger axis is installed between the two sets of contact finger end covers, and the contact finger axis and the two sets of contact finger end covers form an installation station; the first conductive end, the contact finger end cover, the contact finger axis, the contact finger and the second conductive end together form a series current-carrying path.

[0013] In an optional embodiment, the contact finger is rotatably mounted on the contact finger axis.

[0014] In an optional embodiment, the movement direction of the pressure head and the axial direction of the contact finger are perpendicular to each other.

[0015] In an optional embodiment, a conductive sheet is provided on the mounting base, and the conductive sheet is electrically connected to the pressure head to form a first conductive end.

[0016] In a second aspect, an integrated testing method for elastic contact finger parameter characteristics is provided, using the above-mentioned integrated testing device for elastic contact finger parameter characteristics. The testing method includes the following steps:

[0017] S1: Install the contact finger to be tested at the installation station; control the movement of the extended end of the deformation variable component so that the pressure head and the contact finger are close to each other and squeezed, record the movement displacement of the extended end at this time and read the pressure reading of the pressure sensor at this time; connect a DC resistance tester between the first conductive end and the second conductive end, and read the resistance reading of the DC resistance tester at this time;

[0018] S2: After performing step S1 multiple times, the displacement, pressure reading and resistance reading in each test are recorded as a set of data, and the multiple sets of data are analyzed to obtain parameter characteristics of the touch finger.

[0019] The beneficial effects of the embodiments of the present invention are:

[0020] An integrated testing device for elastic contact finger parameter characteristics provided by an embodiment of the present invention utilizes a contact finger mounting member to provide a contact finger installation station. A pressure-applying assembly is disposed on a side opposite the installation station. The pressure-applying assembly can apply pressure to the contact finger within the installation station and display a corresponding pressure reading. A first conductive end and a second conductive end are disposed near the installation station. The first conductive end and the second conductive end can form a series current-carrying path with the contact finger, thereby facilitating the formation of a detection loop with a resistance tester, displaying a corresponding resistance reading, and ultimately obtaining the DC resistance value of the contact finger under a certain pressure deformation. This facilitates analysis or calculation of parameter characteristic indicators such as the performance life and failure resistance of the contact finger, thereby providing component evaluation assurance for the normal operation of the converter substation.

[0021] The integrated testing method for elastic touch finger parameter characteristics provided by an embodiment of the present invention utilizes the above-mentioned testing device. By being able to test the DC resistance value of the touch finger under a certain pressure deformation, it is also possible to test the value of the deformation variable, thereby facilitating the acquisition of the relationship between the deformation variable, pressure, and DC resistance, and comprehensively analyzing the relationship between the pressure and deformation of the touch finger and the influence of the deformation on the DC resistance, thereby providing a more reliable data analysis basis for the evaluation of the parameter characteristic indicators of the touch finger.

[0022] In general, the integrated testing device and method for elastic contact finger parameter characteristics provided by the embodiments of the present invention can fill the gaps in the current existing technology by performing at least pressure deformation and DC resistance-related tests on the contact finger to be tested, and analyzing the parameter characteristics of the contact finger based on the test data obtained, thereby providing reliable evaluation and analysis guarantees for whether the elastic electrical contact component in the valve-side raised seat area of ​​the valve-side sleeve has failed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of an integrated testing device provided in an embodiment of the present invention;

[0025] Figure 2 A schematic front view of an integrated testing device provided in an embodiment of the present invention.

[0026] Icon: 1-base; 2-contact finger base; 3-back plate; 4-contact finger end cover; 5-contact finger; 6-conductive sheet; 7-pressure sensor; 8-reinforcement rib; 9-slider; 10-guide rail; 11-fixing plate; 12-micrometer; 13-bolt; 14-mounting seat; 15-pressure head; 16-second conductive end; 17-contact finger axis. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0031] Furthermore, the terms "parallel" and "perpendicular" do not necessarily mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that the direction is more parallel than "perpendicular," not that the structure must be completely parallel, but rather that it can be slightly tilted.

[0032] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] Example

[0035] See also Figure 1 and Figure 2 This embodiment provides an integrated testing device for elastic contact finger parameter characteristics, including a contact finger mounting member, a pressure-applying assembly, and a DC resistance assembly. The contact finger mounting member is used to provide space for contact finger installation, the pressure-applying assembly is used to apply pressure to the contact finger and cause pressure deformation of the contact finger, and the DC resistance assembly is used to test the DC resistance value of the contact finger under the pressure deformation. In this way, the above method can be used to simulate or test whether the contact finger meets normal use standards or has failed, so as to determine whether the converter substation can continue to operate normally and provide data analysis support.

[0036] Specifically, the stylus mounting member has an installation position for adapting the stylus 5, enabling the stylus 5 to be adapted and installed before or after use. The pressure-applying assembly includes a pressure sensor 7, a pressure head 15, and a mounting base 14. The detection end (probe) of the pressure sensor 7 is connected to the pressure head 15, so that the pressure sensor 7 reading can be read based on the action of the pressure head 15. The fixed end (housing) of the pressure sensor 17 is connected to the mounting base 14, which serves as the basis for stable detection of the pressure sensor 17.

[0037] The DC resistance component includes a first conductive end and a second conductive end 16, where a conductive end refers to a terminal that can form a current loop. When the contact finger is installed at the installation station, the contact finger 5, the first conductive end, and the second conductive end 16 together form a series current-carrying path, thus providing the circuit foundation for DC resistance testing.

[0038] The mounting base 14 is capable of moving toward or away from the mounting station, so that the pressure head 15 can move toward or away from the contact finger 5 in the mounting station. This means that the movement of the mounting base 14 causes the pressure head 15 to be displaced, thereby causing pressure deformation on the surface of the contact finger 5 when the two contact fingers approach each other, thereby simulating the pressure deformation that the contact finger 5 may experience under actual working conditions. The degree of pressure deformation can be adjusted as needed, such as by using deformation parameters obtained through testing of actual working conditions, or by using limit deformation parameters in theoretical calculations. This only provides a method for generating pressure deformation and does not limit the degree of deformation required. By testing the DC resistance of the contact finger 5 under different pressure deformation conditions, it is possible to determine whether the contact finger 5 can normally flow a required current or have a required resistance under these pressure deformation conditions, thereby providing a data analysis basis for determining whether the contact finger 5 has failed.

[0039] Through the above technical solution, the testing device can be used to test and analyze the parameter characteristics of the used or unused contact fingers 5, so as to obtain a judgment result on whether the contact fingers 5 are capable of normal and continuous operation, thereby filling the gap in the existing technology that the failure of key components in whether the converter substation can operate normally cannot be effectively evaluated.

[0040] In some embodiments, a conductive sheet 6 is provided on the mounting seat 14, and the conductive sheet 6 is electrically connected to the pressure head 15 to form the first conductive end, that is, the first conductive end includes the conductive sheet 6 and the pressure head 15, and the conductive sheet 6 is mainly used to form a conductive joint and is interconnected with the remaining conductive joints. The pressure head 15 can also serve as a part of the series current-carrying path, the purpose of which is to allow current to flow through the pressure head 15, and the pressure head 15 serves as a key component for generating deformation of the contact finger 5, so that the most direct and effective correlation data between pressure deformation and DC resistance can be obtained, that is, DC resistance data is test data that can be directly obtained based on the pressure deformation point, avoiding the situation where the DC resistance test loop is too far away from the pressure deformation point, resulting in reduced data reliability.

[0041] Furthermore, to further detect the direct resistance output of the stylus 5 under a certain pressure deformation, and to also detect the deformation generated under that pressure that produces the corresponding direct resistance output, the testing device also includes a deformation component having an extended end connected to the mounting base 14. This indicates that the deformation component itself has a deformation (displacement) measurement function, such as a calibration scale or an auxiliary accessory that can display movement distance. By connecting the extended end of the deformation component to the mounting base 14, the specific displacement of the mounting base 14 can be measured, thereby obtaining the direct resistance output data corresponding to the pressure deformation under the specific deformation. In other words, the three types of data (pressure, deformation, and direct resistance) are obtained, providing a basis for analyzing these three types of data, thereby achieving the goal of further accurately analyzing the parameter characteristics of the stylus 5.

[0042] In this embodiment, the deformation variable assembly includes a micrometer 12 and a fixed plate 11. The fixed plate 11 can be fixed to the external platform. The measuring end and fixed end of the micrometer 12 are located on either side of the fixed plate 11, respectively. The measuring end of the micrometer 12 forms the extended end and is connected to the mounting base 14. The displacement of the measuring end of the micrometer 12 is used to obtain a specific displacement reading. For example, one rotation of the micrometer 12 represents a 0.5 mm movement of the measuring end. Through the above technical solution, the deformation variable displacement of the mounting base 14 and the indenter 15 can be accurately and in real time, requiring only an initial calibration of the position of the indenter 15.

[0043] On the basis of the above scheme, in order to facilitate the installation of the finger mounting member, the pressure-applying assembly, and the direct resistance assembly, so that the finger 5 test operation can be conveniently performed with each other, the test device also includes a test socket, that is, all components are integrated on the test socket. On the one hand, a high degree of structural integration is achieved to facilitate operations such as transfer, installation, and placement. On the other hand, it can easily form an interactive positional relationship between the various components, thereby ensuring that the entire test operation obtains more reliable data. Specifically, the test socket includes a base 1 and a back plate 3 mounted on the base 1. The back plate 3 is vertically mounted on the base 1 and is firmly connected by a reinforcing rib 8. The finger mounting member is mounted on the base 1, so that the finger 5 can also be mounted on the base 1.

[0044] A sliding assembly is mounted on the back plate 3. The sliding end of the sliding assembly is connected to the mounting seat 14 and / or the extension end, enabling the mounting seat 14 to move toward or away from the installation station. This means that the sliding end of the sliding assembly is connected to at least one of the mounting seat 14 and the extension end, and either the sliding end of the sliding assembly drives the mounting seat 14 and the pressure head 15 toward one side of the installation station, or the extension end drives the mounting seat 14 and the pressure head 15 toward one side of the installation station. This provides the entire deformation variable assembly with the foundation for driving the mounting seat 14 and the pressure head 15 to slide, thereby accurately obtaining data on the deformation variable of the pressure head 15.

[0045] To ensure the deformation component accurately displays deformation data, in this embodiment, the sliding end of the sliding component is connected between the mounting base 14 and the extended end, providing stable support and sliding functionality. Specifically, the sliding component includes a guide rail 10 and a slider 9 that slidably engages with the guide rail 10. The slider 9 is connected between the mounting base 14 and the extended end, for example, by bolts 13. The extended end of the deformation component is integrated into a groove on the upper surface of the slider 9, thereby achieving stable support for the upper and lower components.

[0046] Based on the above scheme, the deformation amount and the installation accuracy and movement accuracy of the pressure-applying component are guaranteed. In order to form a stable assembly for the contact finger 5 and facilitate high-precision testing of each component, the contact finger mounting component includes a contact finger base 2, a contact finger axis 17, and two sets of contact finger end caps 4. The contact finger base 2 is fixed to the base 1 and is located vertically below the slider 9. The two sets of contact finger end caps 4 are arranged side by side on the contact finger base to provide space for the contact finger 5. The contact finger axis 17 is installed between the two sets of contact finger end caps 4, and the contact finger axis 17 and the two sets of contact finger end caps 4 form the installation station; that is, the contact finger 5 is installed between the two contact finger end caps 4 to limit the axial displacement of the contact finger 5, and the contact finger 5 is mounted on the contact finger axis 17 to limit the radial displacement of the contact finger 5, thereby achieving the purpose of stable assembly.

[0047] The first conductive end, (at least one side of) the contact finger end cap 4, the contact finger axis 17, the contact finger 5, and the second conductive end 16 collectively form the serial current-carrying path. The serial current-carrying path, encompassing all of the above components, allows the serial current-carrying path to traverse from one surface to the axis and then to the other surface, thereby matching the path of current passing through the contact finger 5 in actual operating conditions and achieving a high degree of simulation matching. Based on the above scheme, the contact finger 5 is rotatably mounted on the contact finger axis 17, facilitating the simulation of a current-carrying path from any measuring surface of the contact finger 5 to the other surface. This allows for multiple rounds of testing at different locations to comprehensively determine the parameter characteristics of the contact finger 5, providing the basis for high-precision analysis of the results. Furthermore, the direction of motion of the indenter 15 is perpendicular to the axis of the contact finger, meaning that the indenter 15 acts in a normal direction on the surface of the contact finger 5. This is done to match actual operating conditions and directly obtain valid correlation data, eliminating the need for more complex calculations due to deflection.

[0048] This embodiment also provides an integrated testing method for elastic contact finger parameter characteristics, which applies the above-mentioned integrated testing device for elastic contact finger parameter characteristics. It should be noted that, in this embodiment, the integrated testing device for elastic contact finger parameter characteristics refers to an integrated testing device including a contact finger mounting part, a pressure-applying component, a direct resistance component, and a deformation variable component, so that correlation testing of the three aspects of pressure-deformation-direct resistance data can be performed.

[0049] Specifically, the test method includes the following steps:

[0050] S1: Install the contact finger 5 to be tested at the installation station; control the movement of the extended end of the deformation component so that the pressure head 15 and the contact finger 5 are close to each other and squeezed, record the displacement of the extended end at this time and read the pressure reading of the pressure sensor 7 at this time; connect a DC resistance tester between the first conductive end and the second conductive end 16, and read the resistance reading of the DC resistance tester at this time; this step means that the test-related components are installed and put into place, so as to obtain the displacement, pressure and resistance readings displayed in each round of testing. Then proceed to S2: After performing step S1 multiple times, the displacement, pressure reading and resistance reading in each test are recorded as a set of data, and the multiple sets of data are analyzed to obtain the parameter characteristics of the contact finger. Through the above technical solution, the relationship between the pressure and deformation of the contact finger 5 under different simulation conditions can be obtained, and the DC resistance value can be measured, thereby providing a data basis for analyzing the relationship between the three.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and that descriptions of known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the present invention.

Claims

1. An integrated testing device for elastic contact finger parameter characteristics, characterized in that: include: A contact finger mounting member having a mounting position for adapting the contact finger; A pressure-applying assembly, comprising a pressure sensor, a pressure head, and a mounting base, wherein a detection end of the pressure sensor is connected to the pressure head, and a fixed end of the pressure sensor is connected to the mounting base; a direct resistance component, the direct resistance component comprising a first conductive end and a second conductive end, wherein when a contact finger is installed at the installation station, the contact finger, the first conductive end, and the second conductive end together form a series current-carrying path; The mounting seat is capable of moving toward or away from the mounting station so that the pressing head and the contact fingers in the mounting station can be pressed toward or away from each other. A conductive sheet is provided on the mounting seat, and the conductive sheet is electrically connected to the pressing head to form the first conductive end. The contact finger mounting member includes a contact finger base, a contact finger axis, and two sets of contact finger end covers. The contact finger base and the base are fixed to each other. The two sets of contact finger end covers are arranged side by side on the contact finger base. The contact finger axis is installed between the two sets of contact finger end covers, and the contact finger axis and the two sets of contact finger end covers form the installation station. The first conductive end, the contact finger end cap, the contact finger axis, the contact finger and the second conductive end together form a series current-carrying path from one side surface of the elastic contact finger to the axis and then to the other side surface.

2. The integrated testing device for elastic contact finger parameter characteristics according to claim 1, characterized in that: Also included is a shape-changing component having an elongated end connected to the mounting seat.

3. The integrated testing device for elastic contact finger parameter characteristics according to claim 2, characterized in that: The deformation variable component includes a micrometer and a fixed plate, the measuring end and the fixed end of the micrometer are respectively located on both sides of the fixed plate, and the measuring end of the micrometer forms the extended end.

4. The integrated testing device for elastic contact finger parameter characteristics according to claim 2 or 3, characterized in that: It also includes a test seat, which includes a base and a back plate installed on the base, the contact finger mounting member is installed on the base, and a sliding assembly is installed on the back plate. The sliding end of the sliding assembly is connected to the mounting seat and / or the extension end so that the mounting seat can move toward or away from the installation station.

5. The integrated testing device for elastic contact finger parameter characteristics according to claim 4, characterized in that: The sliding assembly includes a guide rail and a slider that is slidably matched with the guide rail, and the slider is connected between the mounting seat and the elongated end.

6. The integrated testing device for elastic contact finger parameter characteristics according to claim 1, characterized in that: The contact finger is rotatably mounted on the contact finger axis.

7. The integrated testing device for elastic contact finger parameter characteristics according to claim 2 or 6, characterized in that: The movement direction of the pressure head is perpendicular to the axial direction of the contact finger.

8. An integrated testing method for elastic contact finger parameter characteristics, characterized in that: The integrated testing device for elastic contact finger parameter characteristics according to any one of claims 2 to 7 is used, and the testing method comprises the following steps: S1: Installing the contact finger to be tested at the installation station; controlling the movement of the extended end of the deformation variable component so that the pressure head and the contact finger are close to each other and pressing each other, recording the movement displacement of the extended end at this time and reading the pressure reading of the pressure sensor at this time; connecting a DC resistance tester between the first conductive end and the second conductive end, and reading the resistance reading of the DC resistance tester at this time; S2: After performing step S1 multiple times, the displacement, pressure reading and resistance reading in each test are recorded as a set of data, and the multiple sets of data are analyzed to obtain parameter characteristics of the touch finger.

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