Electronic small signal debugging tool
By designing an electronic small-signal debugging fixture, the problems of unstable equipment detection and high cost in the existing technology are solved. It provides a portable and low-cost equipment debugging solution that can adapt to the needs of different current transformers and improve the stability and flexibility of equipment connection.
Patent Information
- Application Number
- CN202422867654.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-25
AI Technical Summary
In the existing technology, the measured values of relay protection instruments fluctuate greatly and are unstable. Small signal generators are expensive and inconvenient to carry and transport, which makes it difficult to debug, calibrate and test primary and secondary equipment.
An electronic small-signal debugging fixture was designed, including a housing, a first bracket, and a second bracket. A current transformer is installed on the bracket and connected to the housing through a locking unit. The bracket is detachable for easy carrying and transportation. The height of the bracket is adjustable, and the type of current transformer can be replaced. Elastic baffles and limit blocks are used for fixing to ensure stable connection.
It enables easy-to-carry and transport equipment debugging, reduces costs, improves the stability and flexibility of equipment connection, and adapts to the needs of current transformers of different sizes and types.
Smart Images
Figure CN223538901U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of signal debugging equipment technology, specifically to an electronic small signal debugging fixture. Background Technology
[0002] In the large-scale construction and renovation of power distribution networks, a technical solution for the integration of primary and secondary power distribution equipment is proposed to address the mismatch between primary high-voltage switches and secondary intelligent feeder terminal equipment. This solution aims to improve the joint commissioning and testing mechanism and requirements for primary and secondary equipment, thereby enhancing the operational level, maintenance quality, and efficiency of power distribution equipment.
[0003] Existing technologies for debugging, calibrating, and testing primary and secondary equipment terminals generally use relay protection devices for testing. However, the values detected by relay protection devices fluctuate greatly and are unstable. Existing technologies also use small signal generators for testing, but small signal generators are expensive and inconvenient to carry and transport. Utility Model Content
[0004] To address the technical problems existing in the background art, this utility model provides an electronic small signal debugging fixture.
[0005] The technical solution of this utility model is as follows:
[0006] An electronic small signal debugging fixture includes a housing, a first support is provided inside the housing, and the lower parts at both ends of the first support are detachably connected to the bottom plate of the housing through locking units.
[0007] The first bracket has a second bracket along its length on its inner side. Both ends of the second bracket along its length are detachably connected to the first bracket. The height of the second bracket inside the first bracket is adjustable. Both the upper end face of the second bracket and the upper end face of the first bracket are provided with current transformers. The outer side of the housing is provided with an inlet socket and an outlet socket. The inlet socket is electrically connected to the inlet lead of the current transformer, and the outlet socket is electrically connected to the outlet lead of the current transformer.
[0008] The locking unit includes a positioning post and an elastic stop plate that is elastically set on one side. The positioning post is vertically set on the base plate. The lower part of the first bracket is provided with a through hole that is adapted to the positioning post. The positioning post and the elastic stop plate are both inserted into the through hole, and the outer side of the elastic stop plate can abut against the inner wall of the through hole.
[0009] The first and second brackets are used to install different types of current transformers. Each current transformer is electrically connected to the inlet and outlet sockets on both sides of the enclosure. The current transformers and the enclosure form a debugging fixture for debugging and testing primary and secondary equipment. The enclosure-type debugging fixture is easy to carry and has a lower cost compared to testing instruments such as small signal generators. The second bracket can be adjusted up and down to install current transformers of different sizes. The first bracket is easy to disassemble from the enclosure, allowing for quick disassembly and replacement of the entire row of current transformers.
[0010] Regarding the connection structure between the elastic baffle and the positioning post, there are two elastic baffles, which are symmetrically arranged on both sides of the positioning post. The positioning post has a first receiving groove on both sides that can accommodate the elastic baffles. When installing the first bracket, the through hole of the first bracket is fitted onto the positioning post, and the elastic baffle is pressed inward to make it fit tightly with the first receiving groove of the positioning post. After the through hole passes through the elastic baffle, the elastic baffle returns to its original position, and its upper part presses against the through hole, which can limit the first bracket and prevent the first bracket from shaking.
[0011] This utility model is a box-type debugging fixture, which is easy to carry and transport. During carrying or transport, the box is subjected to frequent vibrations, and the elastic baffles will often deform under the action of external forces, affecting the limiting position of the first support. This will cause the current transformer on it to shake, affecting the stability of the connection between the current transformer and the box circuit. To address this, a limiting block is movably provided between the inner side of each elastic baffle and the adjacent first storage slot. The limiting block has a triangular structure, with the tip of the triangle facing down and inserted into the lower part between the elastic baffle and the first storage slot. The limiting block can limit the elastic baffle when the locking unit locks the first support, preventing it from elastically deforming.
[0012] When disassembling the first bracket, in order to facilitate the quick lifting of the limiting block and ensure that the limiting block does not affect the elastic deformation of the elastic stop plate, a second storage slot is provided on the positioning post along the diameter direction, connecting the two first storage slots. A vertical through hole is provided along the axial direction, connecting the second storage slot. The upper part of the hole is open, and a lifting rod connected to the limiting block is inserted into the vertical through hole. The upper end of the lifting rod extends upward to form an opening.
[0013] To facilitate the movement of the two limiting blocks to the second storage slot when the lifting rod is lifted, without affecting the deformation of the elastic baffle towards the first storage slot or the disassembly of the first bracket, the lifting rod is connected to the two limiting blocks via a telescopic rod. When the two limiting blocks move to the position of the second storage slot, they can retract inward. The telescopic rod includes a sleeved thick tube and a thin tube, and the lower end of the lifting rod is connected to the outer surface of the thick tube.
[0014] The opening diameter of the vertical through hole is larger than the width of the lifting rod, allowing the lifting rod to move laterally within the opening, driving the thick tube to move, and working with the telescopic tube to store the two limiting blocks into the second storage slot.
[0015] In order to utilize the elasticity of the elastic baffle to press against the inner wall of the through hole and achieve a better limiting and fixing effect on the first bracket, the connection between the elastic baffle and the positioning post is located below the upper end face of the through hole. The lower end of the elastic baffle is connected to the lower part of the positioning post, and the upper part of the elastic baffle is an outwardly inclined baffle with elasticity. The upper outer surface of the elastic baffle presses against the through hole.
[0016] Regarding the specific structure of the first and second supports, both the first and second supports are U-shaped structures. The lower ends of both ends of the first support are bent outward to form support parts, and through holes are set on the support parts.
[0017] The structure of the second bracket that enables height adjustment within the first bracket is as follows: the first bracket has vertical sliding grooves on both sides along its length, and the two ends of the second bracket along its length are detachably connected to the vertical sliding grooves via connectors.
[0018] The beneficial effects of this utility model are as follows:
[0019] Multiple current transformers are installed side-by-side on both the first and second brackets. The current transformers in the same row are either current transformers or voltage transformers. The types of current transformers on the first and second brackets are different, and the current transformers on the first and second brackets are respectively connected to the corresponding inlet and outlet sockets. The current transformers and the enclosure form a debugging fixture. Through the inlet and outlet sockets on the outside of the enclosure, it is electrically connected to the terminals of primary and secondary equipment. It is possible to debug, calibrate, and test the terminals of primary and secondary equipment. The enclosure is easy to carry and transport, and is relatively portable.
[0020] The lower part of the first bracket is detachably connected to the bottom plate of the box through a locking unit, which facilitates the overall replacement or disassembly of the first bracket and the current transformer on it. The deformation of the elastic baffle acts to tighten the through hole of the first bracket, thereby fixing the first bracket. The operation is relatively simple due to the fixing method of the elastic baffle.
[0021] When the locking unit restricts the first bracket, the deformation of the elastic baffle is restricted by the limit block, which can prevent the box from shaking frequently during carrying or transportation, resulting in a large gap between the first bracket and the locking unit, and prevent the current transformer from shaking, affecting the stability of its connection with the socket.
[0022] The distance between the first and second supports can be adjusted, and current transformers of different heights or types can be installed on the second support. The adjustment method of the second support is relatively convenient. Attached Figure Description
[0023] In the attached diagram:
[0024] Figure 1 This is a structural diagram;
[0025] Figure 2 for Figure 1 Internal structure diagram;
[0026] Figure 3 A schematic diagram of the installation structure of the first bracket, the second bracket, and the current transformer;
[0027] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;
[0028] Figure 5 This is a schematic diagram of the locking unit structure;
[0029] Figure 6 for Figure 5 The front view;
[0030] Figure 7 This is a cross-sectional view of the locking unit.
[0031] The components represented by the various reference numerals in the diagram are:
[0032] 1. Housing; 11. Base plate; 12. Inlet socket; 13. Outlet socket; 2. First bracket; 21. Through hole; 22. Support part; 23. Vertical slide groove; 3. Second bracket; 4. Current transformer; 5. Positioning post; 51. First storage slot; 52. Second storage slot; 53. Vertical through hole; 531. Opening; 6. Elastic baffle; 7. Lifting rod; 8. Telescopic rod; 9. Limiting block. Detailed Implementation
[0033] See Figure 1 , Figure 2 and Figure 3 As shown, an electronic small signal debugging fixture includes a housing 1, and a first bracket 2 is provided inside the housing 1. The lower parts of both ends of the first bracket 2 are detachably connected to the bottom plate 11 of the housing 1 through locking units.
[0034] See Figure 2 and Figure 3 As shown, a second bracket 3 is provided on the inner side of the first bracket 2 along its length direction. Both ends of the second bracket 3 along its length direction are detachably connected to the first bracket 2. The height of the second bracket 3 inside the first bracket 2 is adjustable. Both the upper end face of the second bracket 3 and the upper end face of the first bracket 2 are provided with current transformers 4. An inlet socket 12 and an outlet socket 13 are provided on the outer side of the housing 1. The inlet socket 12 is electrically connected to the inlet lead of the current transformer 4, and the outlet socket 13 is electrically connected to the outlet lead of the current transformer 4.
[0035] In this embodiment, both the first bracket 2 and the second bracket 3 are U-shaped structures. This structure is easy to manufacture, has low operating costs, and can accommodate multiple current transformers. The lower ends of both ends of the first bracket 2 are bent outwards to form support portions 22, and through holes 21 are provided on the support portions 22. The structure that allows the second bracket 3 to achieve height adjustment within the first bracket 2 is as follows: vertical grooves 23 are provided on both sides of the first bracket 2 along its length, and both ends of the second bracket 3 along its length are detachably connected to the vertical grooves 23 via connectors.
[0036] In this embodiment, multiple current transformers 4 are installed side by side on both the first bracket 2 and the second bracket 3. The current transformers 4 in the same row are either current transformers 4 or voltage transformers 4. The current transformers 4 on the first bracket 2 and the second bracket 3 are of different types, and the current transformers 4 on the first bracket 2 and the second bracket 3 are respectively connected to the corresponding inlet socket 12 and outlet socket 13 by wires. The current transformers 4 and the housing 1 form a debugging fixture. Through the inlet socket 12 and outlet socket 13 on the outside of the housing 1, it is electrically connected to the primary and secondary equipment terminals outside, which can be used to debug, calibrate and test the primary and secondary equipment terminals. The housing 1 is easy to carry and transport.
[0037] See Figure 3 , Figure 4 and Figure 5 As shown, the locking unit includes a positioning post 5 and an elastic stop plate 6 elastically disposed on one side. The positioning post 5 is vertically disposed on the bottom plate 11 of the housing 1. The lower part of the first bracket 2 is provided with a through hole 21 adapted to the positioning post 5. Both the positioning post 5 and the elastic stop plate 6 are disposed in the through hole 21, and the outer side of the elastic stop plate 6 can abut against the inner wall of the through hole 21. In this embodiment, there are two elastic stop plates 6, which are symmetrically disposed on both sides of the positioning post 5. The positioning post 5 is symmetrically provided with a first storage groove 51 on both sides to accommodate the elastic stop plates 6. When the two elastic stop plates 6 of the same locking unit are pressed into the first storage groove 51, they can be located in the first storage groove 51 without affecting the locking and disassembly of the first bracket 2. In this embodiment, one end of the first bracket 2 is provided with two through holes 21, and the bottom plate 11 of the housing 1 is provided with locking units corresponding to the through holes 21. That is, this embodiment is provided with four sets of locking units.
[0038] See Figure 5 , Figure 6 and Figure 7As shown, this utility model is a box-type debugging fixture, which is easy to carry and transport. During carrying or transport, the box 1 is subjected to frequent vibrations, and the elastic baffle 6 will often deform under the action of external force, affecting the limiting of the first support 2, which in turn will cause the current transformer 4 on it to shake, affecting the stability of the circuit connection between the current transformer 4 and the box 1. To this end, a limiting block 9 is movably provided between the inner side of each elastic baffle 6 and the adjacent first storage slot 51. The limiting block 9 has a triangular structure, with the tip of the triangular structure pointing downwards and inserted into the lower part between the elastic baffle 6 and the first storage slot 51. The limiting block 9 can limit the elastic baffle 6 when the locking unit locks the first support 2, so as to prevent it from elastically deforming.
[0039] When disassembling the first bracket 2, to facilitate the quick lifting of the limiting block 9 and ensure that the limiting block 9 does not affect the elastic deformation of the elastic stop plate 6, a second storage groove 52 connecting the two first storage grooves 51 is provided along the diameter direction of the positioning post 5, and a vertical through hole 53 connecting the second storage groove 52 is provided along the axial direction. The vertical through hole 53 extends upward and has an opening 531 at its upper part. A lifting rod 7 connected to the limiting block 9 passes through the vertical through hole 53, and the upper end of the lifting rod 7 extends upward out of the opening 531. The diameter of the opening 531 of the vertical through hole 53 is larger than the width of the lifting rod 7, so that the lifting rod 7 can move laterally within the opening 531, driving the thick tube to move, and cooperating with the telescopic tube to store the two limiting blocks 9 into the second storage groove 52.
[0040] To facilitate the movement of the two limiting blocks 9 to the second storage slot 52 when the lifting rod 7 is lifted, without affecting the deformation of the elastic baffle 6 towards the side closer to the first storage slot 51, and without affecting the disassembly of the first bracket 2, the lifting rod 7 is connected to the two limiting blocks 9 through the telescopic rod 8. When the two limiting blocks 9 move up to the position of the second storage slot 52, they can retract inward. The telescopic rod 8 is existing technology and includes a sleeved thick tube and a thin tube. The lower end of the lifting rod 7 is connected to the outer surface of the thick tube.
[0041] In this embodiment, when installing the first bracket 2, the multiple through holes 21 of the first bracket 2 are sequentially fitted onto the corresponding positioning posts 5. The lifting rod 7 is lifted up, so that the limiting block 9 is lifted to the second storage groove 52. The elastic baffles 6 are pressed inward one by one, so that they are tightly attached to the first storage groove 51 of the corresponding positioning post 5. After the through hole 21 passes through the elastic baffle 6, the elastic baffle 6 is reset and its upper part is pressed against the through hole 21. The lifting rod 7 is pushed down, so that the tip of the limiting block 9 is inserted between the elastic baffle 6 and the positioning post 5, which plays the role of preventing the elastic baffle 6 from deforming.
[0042] When disassembling the first bracket 2, lift the lifting rod 7 to raise the limiting block 9 to the second storage groove 52. The two limiting blocks 9 of the same locking unit can move into the second storage groove 52 without affecting the pressing of the elastic stop plate 6 inward. Press the elastic stop plate 6 into the first storage groove 51 so that the first bracket 2 moves upward away from the positioning post 5 and the elastic stop plate 6.
[0043] In order to utilize the elasticity of the elastic baffle 6 to press against the inner wall of the through hole 21 and achieve better limiting and fixing of the first bracket 2, the connection between the elastic baffle 6 and the positioning post 5 is located below the upper end face of the through hole 21. The lower end of the elastic baffle 6 is connected to the lower part of the positioning post 5. The upper part of the elastic baffle 6 is an outwardly inclined baffle with elasticity. The upper outer surface of the elastic baffle 6 presses against the through hole 21.
Claims
1. An electronic small-signal debugging fixture, characterized in that, Includes a housing (1), inside which is provided a first support (2), and the lower parts at both ends of the first support (2) are detachably connected to the bottom plate (11) of the housing (1) via locking units; The first bracket (2) has a second bracket (3) along its length direction on its inner side. Both ends of the second bracket (3) along its length direction are detachably connected to the second bracket (3). The height of the second bracket (3) inside the first bracket (2) is adjustable. Both the upper end face of the second bracket (3) and the upper end face of the first bracket (2) are provided with current transformers (4). The outer side of the box (1) is provided with an inlet socket (12) and an outlet socket (13). The inlet socket (12) is electrically connected to the inlet lead of the current transformer (4), and the outlet socket (13) is electrically connected to the outlet lead of the current transformer (4). The locking unit includes a positioning post (5) and an elastic baffle (6) elastically set on one side. The positioning post (5) is vertically set on the base plate (11). The lower part of the first bracket (2) is provided with a through hole (21) adapted to the positioning post (5). The positioning post (5) and the elastic baffle (6) are both inserted into the through hole (21), and the outer side of the elastic baffle (6) can abut against the inner wall of the through hole (21).
2. The electronic small-signal debugging fixture according to claim 1, characterized in that, Two elastic baffles (6) are provided, and the two elastic baffles (6) are symmetrically arranged on both sides of the positioning post (5). The positioning post (5) is symmetrically provided with a first storage groove (51) that can accommodate the elastic baffles (6).
3. The electronic small-signal debugging fixture according to claim 2, characterized in that, Each of the elastic baffles (6) has a movable limiting block (9) between its inner side and the adjacent first storage groove (51). The limiting block (9) is a triangular structure with its tip pointing downwards and inserted into the lower part between the elastic baffle (6) and the first storage groove (51).
4. The electronic small-signal debugging fixture according to claim 3, characterized in that, The positioning post (5) has a second storage groove (52) that connects the two first storage grooves (51) along the diameter direction, and a vertical through hole (53) that connects the second storage groove (52) along the axial direction. The upper part of the hole is an opening (531). A lifting rod (7) connected to the limiting block (9) is inserted in the vertical through hole (53). The upper end of the lifting rod (7) extends upward to the opening (531).
5. The electronic small-signal debugging fixture according to claim 4, characterized in that, The lifting rod (7) is connected to two limiting blocks (9) via a telescopic rod (8).
6. The electronic small-signal debugging fixture according to claim 5, characterized in that, The opening diameter of the vertical through hole (53) is greater than the width of the lifting rod (7).
7. The electronic small-signal debugging fixture according to claim 1, characterized in that, The connection between the elastic baffle (6) and the positioning post (5) is located below the upper end face of the through hole (21).
8. The electronic small-signal debugging fixture according to claim 1, characterized in that, The first bracket (2) and the second bracket (3) are both gate-shaped structures. The lower ends of both ends of the first bracket (2) are bent outward to form a support part (22) along the length direction, and the through hole (21) is set on the support part (22).
9. An electronic small-signal debugging fixture according to claim 1 or 8, characterized in that, The first bracket (2) has vertical grooves (23) on both sides along the length direction, and the second bracket (3) is detachably connected to the vertical grooves (23) at both ends along the length direction through connectors.