Oil-immersed light high-voltage test transformer

Abstract

The utility model discloses an oil-immersed light high-voltage test transformer which comprises a transformer body, a plurality of binding posts are installed at the top end of the transformer body, fixing plugs are inserted into the tops of the binding posts, electric connection rods are installed in the binding posts, electric connection sleeves are connected to the outer sides of the electric connection rods in a sliding mode, and the fixing plugs are inserted into the fixing plugs. A supporting ring is installed on the side wall of the power connection sleeve, a groove corresponding to the power connection sleeve is formed in the bottom of each fixing plug, and one side of each fixing plug is fixedly connected with an L-shaped linkage rod. The limiting block, the L-shaped linkage rod and the fixing plug are limited through rapid limiting and locking of the limiting wedge block on the limiting block, the stability of extrusion of the fixing plug and the supporting ring on the end of the connecting line is guaranteed, the improved connecting operation is simpler, more convenient and faster, compared with a traditional screwing mode, the time for connecting multiple lines is shortened, and the connecting efficiency is improved. The connection efficiency is improved, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to an oil-immersed lightweight high-voltage test transformer. Background Technology

[0002] With the continuous development of the power industry, the safe operation of electrical equipment is of paramount importance. Oil-immersed lightweight high-voltage test transformers, as a commonly used testing tool, play a crucial role in testing the insulation performance of electrical equipment. These transformers, due to their oil-immersed insulation, possess excellent insulation performance and are relatively lighter and easier to operate and transport than traditional equipment, thus gaining widespread application.

[0003] In the practical use of oil-immersed light-duty high-voltage test transformers, the electrical connection between the transformer and external equipment is a crucial aspect. Currently, the connecting posts on these transformers generally employ a connection structure where the posts are screwed onto the end plates of the connecting lines for secure clamping. However, because oil-immersed light-duty high-voltage test transformers often require the connection of multiple lines to meet different testing needs, operators must individually screw on each of the connecting posts to achieve this clamping and clamping effect. This traditional connection method has significant drawbacks. Firstly, screwing on multiple connecting posts is time-consuming, greatly reducing the efficiency of pre-test preparation and prolonging the entire testing cycle. Secondly, frequent screwing operations not only increase the labor intensity of operators but also, over time, can lead to wear on the connecting post threads, affecting the stability and reliability of the connection, which may adversely impact the accuracy of the test results.

[0004] Therefore, this utility model provides an oil-immersed lightweight high-voltage test transformer. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides an oil-immersed lightweight high-voltage test transformer to solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an oil-immersed lightweight high-voltage test transformer, comprising a transformer body, a plurality of terminals mounted on the top of the transformer body, each terminal having a fixing plug inserted into its top, a connecting rod installed inside each terminal, a connecting sleeve slidably connected to the outside of the connecting rod, a support ring mounted on the side wall of the connecting sleeve, a groove corresponding to the connecting sleeve being formed at the bottom of the fixing plug, and an L-shaped linkage rod fixedly connected to one side of each fixing plug. The unit is equipped with several fixed covers for guiding the L-shaped linkage rod. A limit block is installed at the bottom of the L-shaped linkage rod. The limit block is slidably connected to the inner wall of the corresponding fixed cover. An inclined surface is provided on one side of the limit block. A limiting wedge is provided on one side of each fixed cover to limit the limit block. A second return spring is installed inside each of the fixed covers to push the limit block upward. An unlocking lever is installed on one side of each of the limiting wedges. The unlocking levers are in the same direction, and a rotating wheel is installed at one end of each unlocking lever.

[0007] Preferably, a first reset spring is installed on the inner wall of the terminal block, and the first reset spring is installed at the bottom of the support ring.

[0008] Preferably, a clearance notch is provided on one side of the terminal block, a fixing ring is installed on the inner wall of the terminal block, the fixing ring corresponds to the position of the clearance notch, and the support ring contacts the top of the fixing ring.

[0009] Preferably, a fixed magnetic ring is installed on one side of each of the fixed covers, and a movable magnetic ring is installed on the side wall of the limiting wedge. The movable magnetic ring is magnetically attracted to the corresponding fixed magnetic ring, and two limiting rods are installed on one side of the fixed magnetic ring to limit the movable magnetic ring.

[0010] Preferably, a synchronous pressure rod is provided on one side of several of the fixed plugs, and a number of connecting rods are installed at the bottom of the synchronous pressure rods, the connecting rods being slidably connected to the inner wall of the corresponding L-shaped linkage rod.

[0011] Beneficial effects

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] (1) This utility model uses a limiting wedge to quickly limit and lock the limiting block, thereby limiting the limiting block, L-shaped linkage rod and fixing plug, ensuring the stability of the compression of the connecting wire end by the fixing plug and support ring. The improved connection operation of this utility model is simpler and faster. Compared with the traditional screwing method, the time to connect multiple lines is reduced, the connection efficiency is improved and the labor intensity of operators is reduced. At the same time, the tight connection structure ensures the stability and reliability of the connection, reduces the test error caused by poor contact, ensures the accuracy of the test results, and meets the actual needs of the power testing field for efficient and reliable connection.

[0014] (2) This utility model uses a combination of several unlocking levers and rotating wheels. The operator slides the levers in one direction and moves them away from the corresponding fixed cover to unlock the limit block. The second reset spring pushes the limit block, which causes the fixed plug to automatically release the pressure on the end of the connecting wire, thus completing the unlocking and further improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is the utility model Figure 1 A magnified view of the structure at point A in the middle;

[0017] Figure 3 This is an enlarged cross-sectional view of the terminal block in this utility model;

[0018] Figure 4 This is a three-dimensional enlarged cross-sectional structural diagram of components such as the L-shaped linkage rod in this utility model.

[0019] In the diagram: 1. Transformer body; 2. Terminal block; 21. Connecting rod; 22. Connecting bushing; 221. Support ring; 23. First return spring; 24. Clearance notch; 25. Fixing ring; 3. Fixing plug; 31. L-shaped linkage rod; 32. Fixing cover; 33. Limiting block; 331. Inclined surface; 34. Second return spring; 35. Fixing magnetic ring; 351. Limiting rod; 4. Limiting wedge; 41. Unlocking lever; 411. Rotating wheel; 42. Movable magnetic ring; 5. Synchronous pressure rod; 51. Connecting rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 An oil-immersed light high-voltage test transformer includes a transformer body 1, with several terminals 2 installed at the top of the transformer body 1, and a fixing plug 3 inserted into the top of each of the terminals 2.

[0022] Among them, several terminals 2 are equipped with a power receiving rod 21, and a power receiving sleeve 22 is slidably connected to the outside of the power receiving rod 21. A support ring 221 is installed on the side wall of the power receiving sleeve 22, and a groove corresponding to the power receiving sleeve 22 is opened at the bottom of the fixing plug 3.

[0023] It should be noted that, in this embodiment, the power connection sleeve 22 and the support ring 221 are connected to and support the end of the connecting wire, and the support ring 221 and the fixing plug 3 squeeze and fix the end of the connecting wire.

[0024] Several fixed plugs 3 are fixedly connected to one side of an L-shaped linkage rod 31. Several fixed covers 32 for guiding the L-shaped linkage rod 31 are installed on the top of the transformer body 1. Limiting blocks 33 are installed at the bottom of the L-shaped linkage rod 31. The limiting blocks 33 are slidably connected to the inner wall of the corresponding fixed cover 32. An inclined surface 331 is provided on one side of the limiting block 33. A limiting wedge 4 for limiting the limiting block 33 is provided on one side of each fixed cover 32. A second return spring 34 for pushing the limiting block 33 upward is installed inside each of the several fixed covers 32.

[0025] It should be noted that the positions of the several fixed covers 32 described in this embodiment correspond one-to-one with the positions of the several terminal posts 2.

[0026] Each of the several limit wedges 4 has an unlocking lever 41 installed on one side. The several unlocking levers 41 are in the same direction, and each of the several unlocking levers 41 has a rotating wheel 411 installed at one end.

[0027] Specifically, to address the issue of lengthy connection times required for multiple connection points when electrically connecting the transformer body 1 to external equipment, the connecting rod 21 inside the transformer terminal 2 is made of high-strength conductive metal to ensure good conductivity. Its surface is smoothed, reducing the coefficient of sliding friction with the connecting sleeve 22, allowing the connecting sleeve 22 to slide smoothly on the connecting rod 21. The groove at the bottom of the fixing plug 3 engages with the connecting sleeve 22, ensuring a tight and stable connection. During connection, the end of the connecting cable with the adapter interface is inserted between the fixing plug 3 and the connecting sleeve 22. The support ring 221 and the fixing plug 3 tightly press the end of the connecting cable, effectively preventing loosening. Simultaneously, when the L-shaped linkage rod 31 pushes the fixing plug 3 down, the limiting block 33 descends, compressing and shortening the second return spring 34. The limiting wedge 4 engages with the inclined surface 331, allowing the limiting wedge 4 to slide out and make room. Subsequently, the limiting wedge 4 passes over the limiting block 33, and the limiting wedge 4 is mounted on... The limiting block 33, L-shaped linkage rod 31, and fixing plug 3 are limited, ensuring the stability of the compression of the connecting wire end by the fixing plug 3 and support ring 221. The improved connection operation of this utility model is simpler and faster. Compared with the traditional screwing method, the time to connect multiple lines is reduced, the connection efficiency is improved, and the labor intensity of operators is reduced. At the same time, the tight connection structure ensures the stability and reliability of the connection, reduces test errors caused by poor contact, ensures the accuracy of test results, and meets the actual needs of the power testing field for efficient and reliable connection. When disconnecting the connection after the test, the operator slides the levers 41 in one direction to unlock the limiting block 33. The second reset spring 34 pushes the limiting block 33, so that the fixing plug 3 automatically releases the compression of the connecting wire end, completing the unlocking and further improving work efficiency.

[0028] In one embodiment of this utility model, such as Figures 1-4 As shown, a first reset spring 23 is installed on the inner wall of the terminal 2, and the first reset spring 23 is installed at the bottom of the support ring 221.

[0029] Specifically, in multiple tests simulating the insertion and removal of the connector end, the first return spring 23 always ensures that the support ring 221 returns to its initial position when no external force is applied, ensuring good contact between the support ring 221 and the top of the fixing ring 25, effectively resetting the support ring 221, and facilitating the placement and removal of the connector end when the fixing plug 3 is raised.

[0030] In one embodiment of this utility model, such as Figures 1-4 As shown, a clearance notch 24 is provided on one side of the terminal 2, and a fixing ring 25 is installed on the inner wall of the terminal 2. The fixing ring 25 corresponds to the clearance notch 24, and the support ring 221 contacts the top of the fixing ring 25.

[0031] It should be noted that the clearance notch 24 described in this embodiment provides lateral restriction to the end of the connecting line, and the fixing ring 25 restricts the support ring 221 from descending to its lowest position.

[0032] Specifically, when the connector end is inserted, the clearance notch 24 can precisely limit its lateral movement, preventing the connector end from coming off due to external traction during the connection process. The fixing ring 25 precisely limits the support ring 221 to its lowest position, ensuring that the squeezing force between the support ring 221 and the connector end is uniform each time, further improving the reliability of the connection, reducing the risk of electrical faults caused by unstable connection, and improving the safety and accuracy of power testing.

[0033] In one embodiment of this utility model, such as Figures 1-4 As shown, a number of fixed covers 32 are each equipped with a fixed magnetic ring 35 on one side, and a movable magnetic ring 42 is installed on the side wall of the limiting wedge block 4. The movable magnetic ring 42 is magnetically attracted to the corresponding fixed magnetic ring 35, and two limiting rods 351 are installed on one side of the fixed magnetic ring 35 to limit the movable magnetic ring 42.

[0034] It should be noted that the limiting rod 351 described in this embodiment slides and guides the movable magnetic ring 42 to prevent the limiting wedge block 4 from detaching from one side of the fixed cover 32.

[0035] Specifically, the fixed magnetic ring 35 is made of a strong neodymium iron boron magnet, while the movable magnetic ring 42 is made of a matching magnetic conductive metal material. By using the magnetic attraction between the two, after the limiting block 33 descends and passes the limiting wedge 4, the limiting wedge 4 can automatically slide above the limiting block 33 to complete the limiting.

[0036] In one embodiment of this utility model, such as Figures 1-4 As shown, a number of fixed plugs 3 are provided with a synchronous pressure rod 5 on one side, and a number of connecting rods 51 are installed at the bottom of the synchronous pressure rod 5. The connecting rods 51 are slidably connected to the inner wall of the corresponding L-shaped linkage rod 31.

[0037] It should be noted that the synchronous pressure rod 5 described in this embodiment simultaneously presses down on several L-shaped linkage rods 31.

[0038] Specifically, the synchronous pressure rod 5 is made of high-strength insulating material, which reduces its own weight while ensuring sufficient strength. The sliding fit between the connecting rod 51 and the inner wall of the L-shaped linkage rod 31 ensures that the synchronous pressure rod 5 can smoothly press down on several L-shaped linkage rods 31. In actual operation, the operator only needs to press the synchronous pressure rod 5 to move multiple L-shaped linkage rods 31 downwards at the same time, realizing the synchronous connection of multiple connection points. Compared with operating the connecting parts one by one, the operation efficiency is further improved, the connection steps are simplified, and the operation difficulty is reduced.

[0039] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0040] Working principle: When preparing for connection, place the end of the connecting cable with the adapter interface between the fixed plug 3 and the power sleeve 22. At this time, the power sleeve 22 and the support ring 221 are ready to connect with and support the end of the connecting cable. During the connection operation, press the synchronous pressure rod 5. The connecting rod 51 at the bottom of the synchronous pressure rod 5 slides on the inner wall of the L-shaped linkage rod 31, driving several L-shaped linkage rods 31 to move downward synchronously. The L-shaped linkage rods 31 drive the fixed plug 3 to press down, and the limiting block 33 descends accordingly, compressing and shortening the second return spring 34. During the descent of the limiting block 33, the inclined surface 331 connects with the limiting wedge 4, causing the limiting wedge 4 to slide out and make way. After the limiting block 33 continues to descend and passes the limiting wedge 4, the limiting wedge 4 automatically slides above the limiting block 33 under the magnetic attraction of the fixed magnetic ring 35 and the movable magnetic ring 42 and the guiding and limiting action of the limiting rod 351, completing the connection between the limiting block 33 and the L-shaped linkage rod. The fixed plug 3 and the support ring 221 tightly press the end of the connecting wire to achieve a stable connection and prevent loosening. At the same time, the clearance notch 24 provides lateral restraint to the end of the connecting wire. The fixed ring 25 ensures that the pressure of the support ring 221 on the end of the connecting wire is uniform each time, improving the reliability of the connection. After the test, the operator slides in one direction and slides several unlocking levers 41 away from the corresponding fixed cover 32. The unlocking levers 41 drive the limit wedge 4 to move, releasing the restraint on the limit block 33. The second return spring 34 pushes the limit block 33, causing the limit block 33 to rise. The L-shaped linkage rod 31 and the fixed plug 3 rise accordingly, automatically releasing the pressure on the end of the connecting wire. The support ring 221 returns to its initial position under the action of the first return spring 23, facilitating subsequent operation and completing the entire connection release process, improving work efficiency.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed light-duty high-voltage test transformer, comprising a transformer body (1), characterized in that, The transformer body (1) has several terminals (2) installed at its top, and each of the terminals (2) has a fixing plug (3) inserted into its top. A power receiving rod (21) is installed in each of the several terminals (2). A power receiving sleeve (22) is slidably connected to the outside of the power receiving rod (21). A support ring (221) is installed on the side wall of the power receiving sleeve (22). A groove corresponding to the power receiving sleeve (22) is opened at the bottom of the fixing plug (3). Each of the fixed plugs (3) is fixedly connected to one side with an L-shaped linkage rod (31). The transformer body (1) is equipped with a number of fixed covers (32) for guiding the L-shaped linkage rod (31). A limit block (33) is installed at the bottom of the L-shaped linkage rod (31). The limit block (33) is slidably connected to the inner wall of the corresponding fixed cover (32). An inclined surface (331) is provided on one side of the limit block (33). A limit wedge (4) is provided on one side of each fixed cover (32) for limiting the limit block (33). A second return spring (34) for pushing the limit block (33) upward is installed inside each of the fixed covers (32). Each of the limiting wedges (4) is equipped with an unlocking lever (41) on one side, the unlocking levers (41) are in the same direction, and each of the unlocking levers (41) is equipped with a rotating wheel (411) at one end.

2. The oil-immersed lightweight high-voltage test transformer according to claim 1, characterized in that, A first reset spring (23) is installed on the inner wall of the terminal block (2), and the first reset spring (23) is installed at the bottom of the support ring (221).

3. The oil-immersed lightweight high-voltage test transformer according to claim 1, characterized in that, A clearance notch (24) is provided on one side of the terminal block (2), and a fixing ring (25) is installed on the inner wall of the terminal block (2). The fixing ring (25) corresponds to the clearance notch (24), and the support ring (221) contacts the top of the fixing ring (25).

4. The oil-immersed lightweight high-voltage test transformer according to claim 1, characterized in that, A fixed magnetic ring (35) is installed on one side of each of the fixed covers (32), and a movable magnetic ring (42) is installed on the side wall of the limiting wedge (4). The movable magnetic ring (42) is magnetically attracted to the corresponding fixed magnetic ring (35), and two limiting rods (351) are installed on one side of the fixed magnetic ring (35) to limit the movable magnetic ring (42).

5. The oil-immersed lightweight high-voltage test transformer according to claim 1, characterized in that, A synchronous pressure rod (5) is provided on one side of several fixed plugs (3), and a number of connecting rods (51) are installed at the bottom of the synchronous pressure rod (5). The connecting rods (51) are slidably connected to the inner wall of the corresponding L-shaped linkage rod (31).

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