Transformer shell cable inlet and outlet packaging structure

Abstract

The utility model relates to the technical field of transformers, in particular to a transformer shell cable inlet and outlet packaging structure. Comprising a transformer shell, a conductive column, a sealing cover, a limiting mechanism and two rotating rods; the transformer shell is communicated with a threaded pipe; an insulating sleeve is arranged at the periphery of the conductive column; the sealing cover is arranged at the bottom end of the insulating sleeve, and threads matched with the threaded pipe are arranged on the inner wall of the sealing cover; a sealing assembly is arranged inside the sealing cover; rotating shafts are mounted at the end parts of the two rotating rods; the rotating rods are rotationally mounted on the sealing cover through the rotating shafts; the limiting mechanism comprises a mounting shell, a first limiting ring, a movable rod, a spring, a conical block and a second limiting ring. The sealing structure has the advantages of being good in sealing performance and convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer housing cable inlet and outlet encapsulation structure. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, secondary coil, and iron core. The main functions of a transformer include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization. Currently, the cable inlets and outlets on the transformer casing are connected to external cables via insulating sleeves. These sleeves enclose the cable inlets and outlets on the transformer casing. Transformer oil is added inside the transformer during operation, serving a cooling function.

[0003] In the existing technology, the connection between the insulating bushing and the transformer shell is usually made by multiple bolts, which makes disassembly and assembly difficult and requires specialized equipment. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing a transformer housing cable inlet and outlet encapsulation structure.

[0005] The technical solution of this utility model is a transformer housing cable inlet and outlet encapsulation structure, comprising:

[0006] Transformer casing, with a threaded pipe connected to the transformer casing;

[0007] Conductive post, with an insulating sleeve installed around its outer perimeter;

[0008] A sealing cap is located at the bottom of the insulating sleeve, and a conductive post penetrates the sealing cap. The inner wall of the sealing cap is provided with threads that are compatible with the threaded tube. A sealing component is provided on the inner side of the sealing cap.

[0009] Two rotating rods, each with a rotating shaft at its end, are mounted on the sealing cover via the rotating shafts.

[0010] The limiting mechanism includes a mounting housing, a first limiting ring, a movable rod, a spring, a conical block, and a second limiting ring. The mounting housing is connected to the side wall of the sealing cover. The movable rod moves through the mounting housing. The conical block is connected to the upper end of the movable rod. The second limiting ring is mounted on the movable rod. The spring is sleeved on the movable rod. Both the spring and the second limiting ring are located inside the mounting housing. The first limiting ring is mounted on the outer wall of the transformer housing.

[0011] Preferably, the two rotating rods are symmetrically arranged, and the limiting mechanism is located on the side adjacent to the rotating shaft, with the limiting mechanism situated between the two rotating shafts.

[0012] Preferably, the rotating shaft is fixed on the sealing cover, the rotating rod is rotatably connected to the rotating shaft, and an elastic reset mechanism is installed on both rotating rods. The elastic reset mechanism includes a measuring tape spring and a measuring tape spring mounting housing. The measuring tape spring mounting housing is fixed to the end of the rotating rod, the measuring tape spring is installed inside the measuring tape spring mounting housing, and the end of the rotating shaft extends into the measuring tape spring mounting housing and is connected to the measuring tape spring.

[0013] Preferably, the sealing assembly includes a first sealing ring and a second sealing ring. The first sealing ring is located at the upper end of the inner wall of the sealing cover, and the second sealing ring is located at the lower end of the first sealing ring. The second sealing ring is in clearance fit with the inner side of the threaded pipe.

[0014] Preferably, the cone-shaped block has an inverted cone structure.

[0015] Preferably, the rotating rod has a circular arc structure.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] 1. Because a threaded pipe is connected to the upper end of the transformer casing, the opening at the upper end of the transformer casing is located above its top surface, which reduces the probability of water seepage at the top of the transformer casing; at the same time, because the sealing component is located above the top of the transformer casing, rainwater is less likely to come into contact with the surface of the sealing component, which can improve the service life of the sealing component.

[0018] 2. By turning the lever outward to rotate the sealing cover, the increased power arm can save effort.

[0019] 3. The limiting mechanism can limit the horizontal movement of the sealing cap, preventing the connection between the sealing cap and the threaded pipe from becoming loose. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure after the sealing cap and the threaded tube are separated in this utility model.

[0022] Figure 3 This is a schematic diagram of the bottom structure of the sealing cap in this utility model.

[0023] Figure 4 This is a schematic diagram of the inner structure of the mounting housing in this utility model.

[0024] Figure 5 This is a schematic diagram of the rotating rod and the elastic reset mechanism in this utility model.

[0025] Reference numerals in the attached drawings: 1. Transformer casing; 2. Conductive post; 3. Insulating sleeve; 4. Sealing cover; 5. Threaded tube; 6. Rotating rod; 61. Rotating shaft; 7. Mounting housing; 8. First limiting ring; 9. Movable rod; 10. Spring; 11. Conical block; 12. Second limiting ring; 13. Thread; 141. First sealing ring; 142. Second sealing ring; 15. Measuring tape spring mounting housing; 16. Measuring tape spring. Detailed Implementation

[0026] Example 1

[0027] like Figures 1-4 As shown in the figure, the transformer housing cable inlet and outlet encapsulation structure proposed in this embodiment includes a transformer housing 1, a conductive post 2, a sealing cover 4, a limiting mechanism, and two rotating rods 6.

[0028] A threaded tube 5 is connected to the transformer casing 1; an insulating sleeve 3 is installed on the outer periphery of the conductive post 2; a sealing cover 4 is located at the bottom end of the insulating sleeve 3, the conductive post 2 passes through the sealing cover 4, and the inner wall of the sealing cover 4 is provided with a thread 13 that is compatible with the threaded tube 5; a sealing component is provided on the inner side of the sealing cover 4.

[0029] Both rotating rods 6 are mounted on a rotating shaft 61 at their ends, and the rotating rods 6 are rotatably mounted on the sealing cover 4 via the rotating shaft 61. The two rotating rods 6 are symmetrically arranged, and the limiting mechanism is located on the side adjacent to the rotating shaft 61, and the limiting mechanism is located between the two rotating shafts 61. The rotating rods 6 have an arc structure, which ensures that when the rotating rods 6 are reset to their initial state, they will not exceed the edge of the sealing cover 4.

[0030] The limiting mechanism includes a mounting housing 7, a first limiting ring 8, a movable rod 9, a spring 10, a conical block 11, and a second limiting ring 12. The mounting housing 7 is connected to the side wall of the sealing cover 4. The movable rod 9 moves through the mounting housing 7. The conical block 11 is connected to the upper end of the movable rod 9. The conical block 11 has an inverted conical structure. The second limiting ring 12 is set on the movable rod 9. The spring 10 is sleeved on the movable rod 9. Both the spring 10 and the second limiting ring 12 are located inside the mounting housing 7. The first limiting ring 8 is set on the outer wall of the transformer housing 1. The movable rod 9 can also be driven manually.

[0031] Specifically, during installation, the bottom end of the conductive post 2 is passed through the threaded pipe 5 and extended into the transformer housing 1. The sealing component is then pressed onto the upper end of the threaded pipe 5. Because the threaded pipe 5 is connected to the upper end of the transformer housing 1, the opening at the upper end of the transformer housing 1 is located above its top surface, thereby reducing the probability of water seepage at the top of the transformer housing 1. At the same time, since the sealing component is located above the top of the transformer housing 1, rainwater is less likely to come into contact with the surface of the sealing component, which can improve the service life of the sealing component.

[0032] The technical solution replaces the traditional bolt and nut connection by using a threaded connection between the sealing cap 4 and the threaded pipe 5, which makes the disassembly and assembly speed faster.

[0033] When the sealing cover 4 needs to be disassembled, the movable end of the corresponding rotating rod 6 is turned so that the rotating rod 6 contacts the conical block 11. As the rotating rod 6 continues to rotate, the rotating rod 6 presses against the inclined surface of the conical block 11, causing the conical block 11 to move upward. At this time, the bottom end of the conical block 11 moves out from the inside of the first limiting ring 8, thereby releasing the horizontal limiting work of the sealing cover 4. When the rotating rod 6 rotates to the limited position, the movable rod 9 realizes the limiting of the rotating rod 6. When the rotating rod 6 is turned, the sealing cover 4 is driven to rotate. By turning the rotating rod 6 outward to drive the sealing cover 4 to rotate, the increased power arm can save effort and facilitate the rotation of the sealing cover 4. When tightening the sealing cover 4 to the threaded tube 5, it is only necessary to drive the rotating rod 6 on the other side to rotate.

[0034] Example 2

[0035] like Figure 1 as well as Figure 5 As shown in the figure, the transformer housing cable inlet and outlet encapsulation structure proposed in this embodiment differs from that in Embodiment 1. In this embodiment, the rotating shaft 61 is fixed on the sealing cover 4, and the rotating rod 6 is rotatably connected to the rotating shaft 61. Both rotating rods 6 are equipped with elastic reset mechanisms. The elastic reset mechanism includes a measuring tape spring 16 and a measuring tape spring mounting housing 15. The measuring tape spring mounting housing 15 is fixed to the end of the rotating rod 6, and the measuring tape spring 16 is installed inside the measuring tape spring mounting housing 15. The end of the rotating shaft 61 extends into the measuring tape spring mounting housing 15 and is connected to the measuring tape spring 16. The installed measuring tape spring 16 can drive the rotating rod 6 to automatically reset. After the rotating rod 6 is released by hand, the rotating rod 6 is driven to rotate and reset under the elastic force of the measuring tape spring 16.

[0036] Example 3

[0037] like Figure 3 As shown in the figure, the transformer housing cable inlet and outlet encapsulation structure proposed in this embodiment, compared with the first embodiment, the sealing component in this embodiment includes a first sealing ring 141 and a second sealing ring 142. The first sealing ring 141 is disposed at the upper end of the inner wall of the sealing cover 4, and the second sealing ring 142 is disposed at the lower end of the first sealing ring 141. The second sealing ring 142 is clearance-fitted with the inner side of the threaded tube 5. By adding the second sealing ring 142, it can contact the inner wall of the threaded tube 5, thereby increasing the contact area between the sealing component and the threaded tube 5, and thus improving the sealing effect.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A transformer housing cable inlet and outlet encapsulation structure, characterized in that, include: A transformer casing (1) is provided with a threaded pipe (5) connected to the transformer casing (1); Conductive post (2), with an insulating sleeve (3) installed on the outer periphery of the conductive post (2); A sealing cap (4) is located at the bottom of the insulating sleeve (3). A conductive post (2) passes through the sealing cap (4). The inner wall of the sealing cap (4) is provided with a thread (13) that is compatible with the threaded tube (5). A sealing component is provided on the inner side of the sealing cap (4). Two rotating rods (6), each with a rotating shaft (61) installed at its end, and the rotating rods (6) are rotatably mounted on the sealing cover (4) via the rotating shafts (61); The limiting mechanism includes a mounting housing (7), a first limiting ring (8), a movable rod (9), a spring (10), a conical block (11), and a second limiting ring (12). The mounting housing (7) is connected to the side wall of the sealing cover (4). The movable rod (9) moves through the mounting housing (7). The conical block (11) is connected to the upper end of the movable rod (9). The second limiting ring (12) is set on the movable rod (9). The spring (10) is sleeved on the movable rod (9). The spring (10) and the second limiting ring (12) are both located inside the mounting housing (7). The first limiting ring (8) is set on the outer wall of the transformer casing (1).

2. The transformer housing cable inlet and outlet encapsulation structure according to claim 1, characterized in that, The two rotating rods (6) are symmetrically arranged, and the limiting mechanism is located on the side adjacent to the rotating shaft (61), and the limiting mechanism is located between the two rotating shafts (61).

3. The transformer housing cable inlet and outlet encapsulation structure according to claim 1, characterized in that, The rotating shaft (61) is fixed on the sealing cover (4), and the rotating rod (6) is rotatably connected to the rotating shaft (61). Both rotating rods (6) are equipped with elastic reset mechanisms. The elastic reset mechanism includes a measuring tape spring (16) and a measuring tape spring mounting housing (15). The measuring tape spring mounting housing (15) is fixed to the end of the rotating rod (6), and the measuring tape spring (16) is installed inside the measuring tape spring mounting housing (15). The end of the rotating shaft (61) extends into the measuring tape spring mounting housing (15) and is connected to the measuring tape spring (16).

4. The transformer housing cable inlet and outlet encapsulation structure according to claim 1, characterized in that, The sealing assembly includes a first sealing ring (141) and a second sealing ring (142). The first sealing ring (141) is located on the upper end of the inner wall of the sealing cover (4), and the second sealing ring (142) is located on the lower end of the first sealing ring (141). The second sealing ring (142) is in clearance fit with the inner side of the threaded pipe (5).

5. The transformer housing cable inlet and outlet encapsulation structure according to claim 1, characterized in that, The conical block (11) has an inverted cone structure.

6. The transformer housing cable inlet and outlet encapsulation structure according to claim 1, characterized in that, The rotating rod (6) has a circular arc structure.

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