Performance testing device and testing assembly for single-phase tulip contact

Abstract

A single-phase tulip contact performance testing device and testing assembly comprises a three-axis adjusting assembly and a contact containing cavity, and the contact containing cavity is provided with at least one opening; the three-axis adjusting assembly comprises a fixing piece and an adjusting piece which are connected with each other, the fixing piece is used for fixing the single-phase tulip contact, an opening faces the fixing piece, and the adjusting piece is used for achieving movement of the fixing piece in the three-axis direction of the space; the assembly comprises a single-phase tulip contact performance testing device, a single-phase tulip contact and a static contact. The static contact is fixedly arranged in the contact accommodating cavity, and the single-phase tulip contact is connected with the fixing piece; the single-phase tulip contact is in meshed connection with the static contact; the tulip contact is provided with a Rogowski coil, and the Rogowski coil is used for detecting the value of current flowing through the tulip contact. The centering degree between the tulip contact and the static contact is changed by controlling the three-axis adjusting assembly, and the through-flow in the tulip contact and the static contact is obtained through the Rogowski coil, so that the through-flow conditions of the tulip contact and the static contact under the condition of different centering degrees are analyzed.

Description

Technical Field

[0001] The invention relates to the field of circuit breakers, and in particular to a performance testing device and a testing assembly for a single-phase plum blossom contact. Background Art

[0002] At present, the current carrying capacity of the plum blossom contact in high-voltage circuit breakers can only be measured by measuring its overall current carrying capacity, and the temperature measurement method of the plum blossom contact mainly adopts a wireless temperature measurement device. The device installs a temperature sensor near the plum blossom contact, and then sends the temperature collected by the temperature sensor to the display device through a wireless transmission module.

[0003] As an existing technology, the temperature measuring device has the following limitations: it cannot measure the flow capacity of a single contact piece of the plum blossom contact when the plum blossom contact and the static contact have different eccentricities; and it cannot directly adjust the centering degree of the plum blossom contact; at the same time, due to being susceptible to high temperature and high pressure environment and interference during wireless transmission, there may be a certain deviation between the temperature data measured by the device and the actual value. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a performance test device and a test assembly for a single-phase plum blossom contact, so as to solve the problem of difficulty in testing the current-carrying capacity of the contact pieces when the plum blossom contact and the stationary contact have different alignment degrees.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A performance testing device for a single-phase plum blossom contact, comprising a three-axis adjustment assembly and a contact accommodating cavity, wherein the contact accommodating cavity is provided with at least one opening; The three-axis adjustment assembly includes a fixing member and an adjustment member connected to each other, the fixing member is used to fix the single-phase plum blossom contact, the opening faces the fixing member, and the adjustment member is used to enable the fixing member to move in three-axis directions in space.

[0006] In order to solve the above technical problems, another technical solution adopted by the present invention is: A performance testing assembly comprises a performance testing device for a single-phase plum blossom contact, a single-phase plum blossom contact and a stationary contact; the stationary contact is fixedly arranged in the contact accommodating cavity, and the single-phase plum blossom contact is connected to the fixing member; the single-phase plum blossom contact and the stationary contact are meshingly connected; a Rogowski coil is arranged on the plum blossom contact, and the Rogowski coil is used to detect the current value flowing through the plum blossom contact.

[0007] The beneficial effects of the present invention are at least that: a performance testing device and a testing assembly for a single-phase plum blossom contact are provided, a three-axis adjustment component is arranged to fix the plum blossom contact, and a static contact is fixed in a contact accommodating cavity, after the plum blossom contact and the static contact are meshed and connected, the degree of alignment between the plum blossom contact and the static contact is changed by manipulating the three-axis adjustment component, and the flow therein is obtained by a Rogowski coil, so as to analyze the flow of the plum blossom contact and the static contact under different degrees of alignment, the current density of the single-touch finger electrical contact, the heating condition and the degree of harm of the electrical contact under long-time rated current and short-time impulse current, the performance of the plum blossom contact is quickly understood, and adjustment is convenient in the use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Schematic diagram a of a performance test assembly of a single-phase plum blossom contact in an embodiment of the present invention; Figure 2 Schematic diagram b of a single-phase plum blossom contact performance test assembly in an embodiment of the present invention; Figure 3 is a schematic diagram of a three-axis adjustment assembly in an embodiment of the present invention; Figure 4 It is a schematic diagram of assembling the stylus finger and the Rogowski coil in an embodiment of the present invention; Figure 5 It is a schematic diagram of the assembly of the contact accommodating cavity in the embodiment of the present invention; Description of labels: 1. Performance test device; 11. Three-axis adjustment assembly; 111. Fixing piece; 1111. Insulating sleeve; 1112. Contact fixing part; 112. Adjusting piece; 1121. X-axis adjustment part; 1122. Y-axis adjustment part; 1123. Z-axis adjustment part; 1124. Connecting part; 12. Contact accommodating cavity; 121. Opening; 122. Transparent section; 123. Window; 2. Plum blossom contact; 21. Rogowski coil; 22. Contact arm; 23. Contact piece; 3. Stationary contact. DETAILED DESCRIPTION

[0009] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0010] Please refer to Figure 1 as well as Figure 2 , a single-phase plum blossom contact performance test device 1, comprising a three-axis adjustment component 11 and a contact accommodating cavity 12, wherein the contact accommodating cavity 12 is provided with at least one opening 121; The three-axis adjustment assembly 11 includes a fixing member 111 and an adjusting member 112 connected to each other. The fixing member 111 is used to fix the single-phase plum blossom contact 2. The opening 121 faces the fixing member 111. The adjusting member 112 is used to enable the fixing member 111 to move in three-axis directions in space.

[0011] Please refer to Figure 1 , Figure 2 and Figure 5 A performance testing assembly comprises a performance testing device 1 for the single-phase plum blossom contact 2, the single-phase plum blossom contact 2 and a static contact 3; the static contact 3 is fixedly arranged in the contact accommodating cavity 12, and the single-phase plum blossom contact 2 is connected to the fixing member 111; the single-phase plum blossom contact 2 and the static contact 3 are meshed and connected; a Rogowski coil 21 is provided on the plum blossom contact 2, and the Rogowski coil 21 is used to detect the current value flowing through the plum blossom contact 2.

[0012] It is understandable that the plum blossom contact 2 needs to be tested for alignment, mainly to evaluate the performance and reliability of the contact when it is not centered (i.e., deviating from the ideal center position). Among them, the multiple contact pieces 23 of the plum blossom contact 2 need to bear the current, and in the centered state, the current should be evenly distributed among the contact pieces 23. However, when the contact is not centered, some of the contact pieces 23 may share more current, resulting in local heating, increased loss, and even possible overload. Therefore, by testing the alignment, the change in current distribution under different alignment conditions can be confirmed, and the carrying capacity of the contact piece 23 can be evaluated. In order to obtain the specific state of the plum blossom contact 2 under the test environment, the present invention introduces a Rogowski coil 21, which is a coreless current sensor for measuring alternating current, and its working principle is based on electromagnetic induction. The Rogowski coil 21 is usually composed of a uniformly wound coil, which can surround the current conductor, but does not require a closed magnetic circuit or a magnetic core itself.

[0013] From the above description, it can be seen that the beneficial effect of the present invention is that: by setting a three-axis adjustment component 11 to fix the plum blossom contact 2, and fixing the static contact 3 in the contact accommodating cavity 12, after the plum blossom contact 2 and the static contact 3 are engaged and connected, by manipulating the three-axis adjustment component 11, the alignment between the plum blossom contact 2 and the static contact 3 is changed, and the flow therein is obtained through the Rogowski coil 21, so as to analyze the flow conditions of the plum blossom contact 2 and the static contact 3 under different alignment degrees, quickly understand the performance of the plum blossom contact 2, and facilitate adjustment in the use environment.

[0014] In an embodiment of the present invention, the fixing member 111 includes an insulating sleeve 1111 and a contact fixing portion 1112 connected to each other, the insulating sleeve 1111 is fixedly connected to the adjusting member 112 , and the contact fixing portion 1112 is used to fix the contact arm 22 of the single-phase plum blossom contact 2 .

[0015] From the above description, it can be seen that the design of the insulating sleeve 1111 and the contact fixing portion 1112 not only ensures the safety of the operator, but also prevents current leakage. The contact fixing portion 1112 can firmly support the contact arm 22, ensure the stability of the contact under various working conditions, and make the test results more consistent and reliable.

[0016] In an embodiment of the present invention, at least a portion of the surface of the insulating sleeve 1111 is provided with an annular protrusion.

[0017] From the above description, it can be seen that an annular protrusion is provided on the insulating sleeve 1111 to increase the surface area of ​​the insulating sleeve 1111, thereby increasing the creepage distance and further ensuring the safety when adjusting the centering degree of the equipment in the power-on state.

[0018] In the embodiment of the present invention, the contact accommodating cavity 12 includes at least one transparent section 122 , and the transparent section 122 is made of infrared-transmissive material.

[0019] From the above description, it can be seen that the transparent section 122 allows the internal situation of the device to be directly observed without opening the cavity during testing. At the same time, the transparent section 122 has infrared penetrability, that is, an infrared sensor can be used through the transparent area to perform non-contact temperature measurement, thereby ensuring the integrity of the test environment and reducing external interference, while meeting the requirements of voltage resistance, temperature rise and insulation performance.

[0020] In the embodiment of the present invention, the contact accommodating cavity 12 is provided with a window 123 , and the transparent section 122 is sealedly connected to the window 123 .

[0021] From the above description, it can be seen that the window 123 is sealed and connected to the transparent section 122, that is, the transparent section 122 and the cavity are not designed as an integral whole. During the manufacturing process, the cavity and the transparent section 122 can be sealed and connected by assembly connection, which reduces the manufacturing difficulty and ensures the airtightness of the device. It prevents the influence of the external environment on the test, thereby ensuring the consistency of the test conditions, providing a stable experimental environment for the test, and helping to obtain more accurate test results.

[0022] Please refer to Figure 3In an embodiment of the present invention, the adjusting member 112 includes an X-axis adjusting portion 1121, a Y-axis adjusting portion 1122, a Z-axis adjusting portion 1123 and a connecting portion 1124, and the connecting portion 1124 is connected to the fixing member 111; the X-axis adjusting portion 1121 is movably connected to the connecting portion 1124, and the X-axis adjusting portion 1121 is used to adjust the position of the connecting portion in the X-axis direction; the Y-axis adjusting portion 1122 is movably connected to the connecting portion 1124, and the Y-axis adjusting portion 1122 is used to adjust the position of the connecting portion in the Y-axis direction; the Z-axis adjusting portion 1123 is movably connected to the connecting portion 1124, and the Z-axis adjusting portion 1123 is used to adjust the position of the connecting portion in the Z-axis direction.

[0023] From the above description, it can be seen that the X, Y, and Z three-axis adjustment parts can accurately control the contact position so that its displacement in three directions can be adjusted independently. This design improves the control accuracy of the contact position during the test, provides convenient operation for misalignment testing, and helps to explore the performance of the contact at different offset angles. Specifically, the X-axis adjustment part 1121 includes an X-axis adjustment knob and an X-axis adjustment spring. The X-axis adjustment knob is crimped with the X-axis adjustment spring. When the X-axis adjustment knob is rotated, the position of the connecting part 1124 in the X-axis direction is adjusted by adjusting the tightness of the X-axis adjustment spring. The same is true for the Y-axis and Z-axis.

[0024] Please refer to Figure 4 In an embodiment of the present invention, the plum blossom contact 2 includes a contact arm 22 and a plurality of contact pieces 23 arranged in a ring array, the contact piece 23 is connected to the contact arm 22, and the contact arm 22 is connected to the fixing member 111; the Rogowski coil 21 is wound around the middle section of each of the contact pieces 23, and the Rogowski coil 21 is used to detect the current value flowing through each contact piece 23.

[0025] As can be seen from the above description, the Rogowski coil 21 is wound around the middle section of each contact piece 23, realizing accurate detection of the current. In the case of different alignments of the plum blossom contact 2 and the static contact 3, this design can measure the current load of each contact piece 23 respectively, which is convenient for analyzing the current distribution and flow state between the contacts 23.

[0026] In an embodiment of the present invention, the assembly further includes an information processing unit, which is communicatively connected to the Rogowski coil 21 and is used to process the electrical signal transmitted by the Rogowski coil 21. The information processing unit is connected to the Rogowski coil 21 and processes the electrical signal transmitted by it, thereby realizing real-time monitoring and analysis of data, timely reflecting and tracking the current changes on each contact piece 23, and providing efficient support for current distribution analysis under misalignment conditions.

[0027] In an embodiment of the present invention, the assembly further comprises a temperature measuring unit, which is located near the transparent section 122 of the contact accommodating cavity 12 and is used for real-time detection of temperature changes of the plum blossom contact 2 and the static contact 3 during the flow of current.

[0028] As can be seen from the above description, in order to measure the temperature more accurately and observe the eccentricity between the plum blossom contact 2 and the stationary contact 3 more effectively, the present invention uses infrared temperature measurement to obtain the contact temperature through the transparent section 122, and matches it with the flow state obtained by the Rogowski coil 21, which can not only ensure that the infrared temperature sensor measures the temperature inside the contact box, but also better observe the eccentricity of the plum blossom contact 2 and the stationary contact 3. The temperature measurement unit can detect the change of the contact temperature in real time through infrared technology, ensure that the temperature rise during the flow process can be accurately monitored, help evaluate the reliability of the contact under different temperature conditions, and provide a reference for optimizing the heat dissipation design.

[0029] The present invention provides a single-phase plum blossom contact performance test device 1 and a test assembly, which are mainly used for circuit breaker performance testing, and are specifically described below in conjunction with embodiments.

[0030] Please refer to Figures 1 to 5 , Embodiment 1 of the present invention is: A performance testing device 1 for a single-phase plum blossom contact comprises a three-axis adjustment component 11 and a contact accommodating chamber 12, wherein the contact accommodating chamber 12 is provided with at least one opening 121; the three-axis adjustment component 11 comprises a fixing member 111 and an adjusting member 112 connected to each other, the fixing member 111 is used to fix the single-phase plum blossom contact 2, the opening 121 faces the fixing member 111, and the adjusting member 112 is used to enable the fixing member 111 to move in three-axis directions in space.

[0031] A performance test assembly includes a performance test device 1 for a single-phase plum blossom contact 2, the single-phase plum blossom contact 2 and a static contact 3; the static contact 3 is fixedly arranged in a contact accommodating cavity 12, and the single-phase plum blossom contact 2 is connected to a fixing member 111; the single-phase plum blossom contact 2 and the static contact 3 are meshed and connected; a Rogowski coil 21 is provided on the plum blossom contact 2, and the Rogowski coil 21 is used to detect the current value flowing through the plum blossom contact 2.

[0032] That is, in the present embodiment, the plum blossom contact 2 is fixed by setting a three-axis adjustment component 11, and the stationary contact 3 is fixed in the contact accommodating cavity 12. After the plum blossom contact 2 and the stationary contact 3 are engaged and connected, the three-axis adjustment component 11 is manipulated to change the alignment between the plum blossom contact 2 and the stationary contact 3, and the flow therein is obtained through the Rogowski coil 21, so as to analyze the flow conditions of the plum blossom contact 2 and the stationary contact 3 under different alignment degrees, quickly understand the performance of the plum blossom contact 2, and facilitate adjustment in the use environment.

[0033] The plum blossom contact 2 includes a contact arm 22 and a plurality of contact pieces 23 arranged in a ring array, the contact piece 23 is connected to the contact arm 22, and the contact arm 22 is connected to the fixing member 111; the Rogowski coil 21 is wound around the middle section of each contact piece 23, and the Rogowski coil 21 is used to detect the current value flowing through each contact piece 23. In the case of different alignments of the plum blossom contact 2 and the static contact 3, this design can measure the current load of each contact piece 23 respectively, which is convenient for analyzing the current distribution and flow state between the contact pieces 23.

[0034] The assembly also includes an information processing unit, which is in communication connection with the Rogowski coil 21 and is used to process the electrical signal transmitted by the Rogowski coil 21. The information processing unit is connected to the Rogowski coil 21 and processes the electrical signal transmitted by it, thereby realizing real-time monitoring and analysis of data, timely reflecting and tracking the current changes on each contact piece 23, and providing efficient support for current distribution analysis under misalignment conditions.

[0035] Embodiment 2 of the present invention is: On the basis of the first embodiment, the fixing member 111 includes an insulating sleeve 1111 and a contact fixing portion 1112 connected to each other, the insulating sleeve 1111 is fixedly connected to the adjusting member 112, and the contact fixing portion 1112 is used to fix the contact arm 22 of the single-phase plum blossom contact 2. An annular protrusion is provided on at least part of the surface of the insulating sleeve 1111. The annular protrusion is provided on the insulating sleeve 1111 to increase the surface area of ​​the insulating sleeve 1111, thereby increasing the creepage distance, and further ensuring the safety when adjusting the centering degree of the equipment in the power-on state.

[0036] The contact accommodating chamber 12 includes at least one transparent section 122, which is made of infrared-transmissive material. The contact accommodating chamber 12 is provided with a window 123, and the transparent section 122 is sealed and connected to the window 123. The transparent section 122 allows the device to directly observe the internal situation without opening the cavity during testing. At the same time, the transparent section 122 has infrared transmissivity, that is, the infrared sensor can be used through the transparent area for non-contact temperature measurement, ensuring the integrity of the test environment, reducing external interference, and meeting the requirements of withstand voltage, temperature rise and insulation performance. The assembly also includes a temperature measurement unit, which is located near the transparent section 122 of the contact accommodating chamber 12 and is used to detect the temperature changes of the plum blossom contact 2 and the static contact 3 during the flow process in real time. The contact temperature is obtained by infrared temperature measurement through the transparent section 122, and matched with the flow state obtained by the Rogowski coil 21, which can not only ensure that the infrared temperature sensor measures the temperature inside the contact box, but also better observe the eccentricity of the plum blossom contact 2 and the static contact 3. The temperature measurement unit can detect the contact temperature changes in real time through infrared technology, ensuring that the temperature rise during the flow process can be accurately monitored, which helps to evaluate the reliability of the contact under different temperature conditions and provide a reference for optimizing the heat dissipation design.

[0037] Embodiment 3 of the present invention is: On the basis of the first embodiment, the adjusting member 112 includes an X-axis adjusting portion 1121, a Y-axis adjusting portion 1122, a Z-axis adjusting portion 1123 and a connecting portion 1124, wherein the connecting portion 1124 is connected to the fixing member 111; the X-axis adjusting portion 1121 is movably connected to the connecting portion 1124, and the X-axis adjusting portion 1121 is used to adjust the position of the connecting portion in the X-axis direction; the Y-axis adjusting portion 1122 is movably connected to the connecting portion 1124, and the Y-axis adjusting portion 1122 is used to adjust the position of the connecting portion in the Y-axis direction; the Z-axis adjusting portion 1123 is movably connected to the connecting portion 1124, and the Z-axis adjusting portion 1123 is used to adjust the position of the connecting portion in the Z-axis direction. Specifically, the X-axis adjusting portion 1121 includes an X-axis adjusting knob and an X-axis adjusting spring, wherein the X-axis adjusting knob is pressed against the X-axis adjusting spring, and when the X-axis adjusting knob is rotated, the position of the connecting portion 1124 in the X-axis direction is adjusted by adjusting the tightness of the X-axis adjusting spring, and the same is true for the Y-axis and the Z-axis.

[0038] In summary, the performance test device and test assembly of a single-phase plum blossom contact provided by the present invention have the following beneficial effects: Multi-axis adjustment design realizes high-precision centering test: By setting up the three-axis adjustment component, the plum blossom contact can be flexibly adjusted in the three-axis directions of X, Y, and Z, and the centering degree between the plum blossom contact and the static contact can be quickly changed, so as to more realistically simulate the contact state under different working conditions. This structure facilitates accurate performance testing under various eccentric conditions, ensuring the adaptability and adjustment flexibility of the equipment.

[0039] Rogowski coil accurately detects current distribution: Setting a Rogowski coil on the plum blossom contact can detect the current load of each contact piece separately, so that the current flow characteristics and current distribution of the contact under misalignment conditions can be clearly analyzed, which helps to find problems caused by uneven force on the contact piece and current distribution, thereby providing data support for equipment design and optimization.

[0040] Insulation structure enhances safety and electrical isolation: The insulating sleeve surface of the fixture is provided with an annular protrusion structure, which can effectively increase the insulation distance and prevent the contact from leaking current during the test, thereby ensuring the safety of the test. In addition, the annular protrusion design also increases the creepage distance, further improving the safety performance of the equipment.

[0041] Infrared penetrating transparent section facilitates temperature monitoring and observation: The transparent section of the contact accommodating cavity is made of infrared penetrating material, allowing the infrared temperature sensor to perform non-contact measurement of the temperature in the cavity, so that the temperature rise test process does not need to destroy the sealed environment. The temperature measurement unit can monitor the temperature rise of the contact in real time, ensure the accuracy of the test results, and help evaluate the reliability of the contact in a high temperature environment.

[0042] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A performance test device for a single-phase plum blossom contact, characterized in that: It comprises a three-axis adjustment assembly and a contact accommodating cavity, wherein the contact accommodating cavity is provided with at least one opening; The three-axis adjustment assembly includes a fixing member and an adjustment member connected to each other, the fixing member is used to fix the single-phase plum blossom contact, the opening faces the fixing member, and the adjustment member is used to enable the fixing member to move in three-axis directions in space.

2. The performance testing device for a single-phase plum blossom contact according to claim 1 is characterized in that: The fixing member comprises an insulating sleeve and a contact fixing portion which are connected to each other. The insulating sleeve is fixedly connected to the adjusting member, and the contact fixing portion is used to fix the contact arm of the single-phase plum blossom contact.

3. A performance testing device for a single-phase plum blossom contact according to claim 2, characterized in that: At least part of the surface of the insulating sleeve is provided with an annular protrusion.

4. The performance testing device for a single-phase plum blossom contact according to claim 1 is characterized in that: The contact accommodating cavity includes at least one transparent section, and the transparent section is made of infrared-transmissive material.

5. A performance testing device for a single-phase plum blossom contact according to claim 4, characterized in that: The contact accommodating cavity is provided with a window, and the transparent section is sealed and connected to the window.

6. A performance testing device for a single-phase plum blossom contact according to claim 1, characterized in that: The adjusting member includes an X-axis adjusting portion, a Y-axis adjusting portion, a Z-axis adjusting portion and a connecting portion, wherein the connecting portion is connected to the fixing member; the X-axis adjusting portion is movably connected to the connecting portion, and the X-axis adjusting portion is used to adjust the position of the connecting portion in the X-axis direction; the Y-axis adjusting portion is movably connected to the connecting portion, and the Y-axis adjusting portion is used to adjust the position of the connecting portion in the Y-axis direction; the Z-axis adjusting portion is movably connected to the connecting portion, and the Z-axis adjusting portion is used to adjust the position of the connecting portion in the Z-axis direction.

7. A performance test assembly, characterized in that: It comprises a performance testing device for a single-phase plum blossom contact as described in any one of claims 1 to 6, a single-phase plum blossom contact and a static contact; the static contact is fixed in the contact accommodating cavity, and the single-phase plum blossom contact is connected to the fixing piece; the single-phase plum blossom contact and the static contact are meshingly connected; a Rogowski coil is provided on the plum blossom contact, and the Rogowski coil is used to detect the current value flowing through the plum blossom contact.

8. A performance test assembly according to claim 7, characterized in that: The plum blossom contact includes a contact arm and a plurality of contact pieces arranged in a circular array, wherein the contact piece is connected to the contact arm, and the contact arm is connected to a fixing member; the Rogowski coil is wound around the middle section of each contact piece, and the Rogowski coil is used to detect the current value flowing through each contact piece.

9. A performance test assembly according to claim 8, characterized in that: The assembly further includes an information processing unit, which is communicatively connected to the Rogowski coil and is used for processing the electrical signal transmitted by the Rogowski coil.

10. A performance test assembly according to claim 7, characterized in that: The assembly also includes a temperature measuring unit, which is located near the transparent section of the contact accommodating cavity and is used to detect the temperature changes of the plum blossom contact and the static contact during the flow process in real time.

Images