Box-type transformer incoming and outgoing line cable sealing device

Abstract

The utility model discloses a box -type transformer incoming and outgoing line cable plugging device relates to electric power equipment sealing technical field. The device includes the first sealing plate and second sealing plate through the pivot articulates, and the both enclose and form the adaptation groove. The first sealing plate is equipped with the first arc -shaped hole with pivot as center, and the second sealing plate is equipped with corresponding second arc -shaped hole. The first arc -shaped hole end is equipped with fixed axle, and the sleeve set includes the clamping piece of U -shaped spring piece on it, and spring piece open end stretches into second arc -shaped hole. The inner wall of second arc -shaped hole is equipped with arc -shaped clamping tooth, and U -shaped spring piece both sides are equipped with the block and mesh with it, and constitute one -way locking mechanism: pinch sealing plate and reduce the block of adaptation groove when sliding through the clamping tooth, and the reverse is locked dead; pinch spring piece can remove the locking. The utility model realizes the quick clamping and reliable lock of cable, solves the problem of traditional plugging mode adjustment locking slow, inconvenient to dismount, and through optional anti -touch fixed assembly and U -shaped silica gel strip, further improves the operation safety and sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of power equipment sealing technology, specifically a sealing device for the incoming and outgoing cables of a box-type transformer. Background Technology

[0002] As a key piece of equipment in power systems, the reliable sealing of the incoming and outgoing cables of box-type transformers is a crucial aspect of ensuring the safe and stable operation of the equipment. Effective sealing can prevent small animals from entering, dust from accumulating, and moisture or water from seeping into the enclosure, thereby avoiding short circuits, corrosion, and electrical faults caused by these factors.

[0003] Currently, common cable sealing methods include using fireproof putty, epoxy resin casting, or modular sealing blocks. While fireproof putty sealing is simple to operate, it is prone to hardening, cracking, or detachment after long-term use, leading to seal failure. Epoxy resin casting, on the other hand, is difficult to disassemble and adjust after curing, causing difficulties for subsequent line maintenance or replacement. Existing modular mechanical sealing devices, although offering improvements in adjustability, often suffer from slow adjustment and locking mechanisms, making it difficult to balance installation efficiency with convenient maintenance. Therefore, a box-type transformer inlet and outlet cable sealing device is proposed. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a box-type transformer inlet and outlet cable sealing device, which has the advantages of quick adjustment and locking and easy maintenance, and solves the problems of slow adjustment and locking and inconvenient disassembly of traditional sealing methods.

[0005] (II) Technical Solution To achieve the aforementioned goals of rapid adjustment and locking while facilitating maintenance, this utility model provides the following technical solution: A box-type transformer inlet and outlet cable sealing device includes a first sealing plate and a second sealing plate hinged to each other by a rotating shaft. The first sealing plate and the second sealing plate together form an adapter groove for clamping the cable. The first sealing plate has a first arc-shaped hole with the rotating shaft as the center, and the second sealing plate has a second arc-shaped hole with the rotating shaft as the center. The first arc-shaped hole and the second arc-shaped hole are arranged opposite to each other. A fixed shaft is fixedly provided at the end of the first arc-shaped hole, and a snap-fit ​​component is fitted on the fixed shaft. The snap-fit ​​component includes a U-shaped spring sheet, which is partially accommodated in the first arc-shaped hole and its open end extends into the second arc-shaped hole. The two opposite inner walls of the second arc-shaped hole are provided with locking teeth arranged in an arc shape with the rotating shaft as the center; The U-shaped spring sheet has locking blocks on both sides that engage with the locking teeth, forming a one-way locking mechanism: when the first sealing plate and the second sealing plate rotate relative to each other to reduce the fitting groove, the locking blocks can slide past the locking teeth; when rotated in the opposite direction, the locking blocks engage and lock with the locking teeth; by pinching the open end of the U-shaped spring sheet, the locking blocks can be separated from the locking teeth to release the lock.

[0006] The first sealing plate and the second sealing plate are the same size.

[0007] The first sealing plate is located above the second sealing plate, and the bottom of the first sealing plate is provided with a foot pad that is at the same height as the bottom surface of the second sealing plate.

[0008] Both the first and second sealing plates have mounting holes.

[0009] A fixing component is installed on the first sealing plate above the first arc-shaped hole. The fixing component includes a fixing bracket and a locking screw. The fixing bracket is mounted above the first arc-shaped hole. The locking screw is threadedly connected to the fixing bracket, and its lower end can extend into the opening of the U-shaped spring sheet to restrict the U-shaped spring sheet from being pinched.

[0010] The inner wall of the adapter groove is provided with a U-shaped silicone strip for enhancing sealing and cushioning.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a box-type transformer inlet and outlet cable sealing device, which has the following beneficial effects: This box-type transformer inlet and outlet cable sealing device utilizes a first arc-shaped hole and a second arc-shaped hole centered on a rotating shaft, along with a one-way locking mechanism. The engagement of the U-shaped spring plate's side blocks with the teeth inside the arc-shaped holes enables rapid clamping and reliable locking of the cables. This design allows operators to lock the cable simply by rotating the sealing plate in one direction, effectively solving the problems of slow adjustment and easy loosening in traditional mechanical sealing devices. It significantly improves installation efficiency and sealing reliability. Furthermore, the U-shaped silicone strip within the groove further enhances the sealing effect and shock resistance.

[0012] This box-type transformer inlet and outlet cable sealing device achieves a balance between convenient maintenance and safe operation through an optimized U-shaped spring plate structure and optional anti-accidental contact fixing components. Operators can quickly release the locking state by simply squeezing the spring plate, facilitating cable maintenance and replacement. Simultaneously, tightening the locking screws in the fixing components effectively prevents accidental unlocking. Combined with the level foot pads at the bottom, it ensures both installation stability and long-term operational safety, effectively solving the problems of inconvenient disassembly and insufficient safety and reliability of traditional sealing devices. Attached Figure Description

[0013] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 This is a top view of the overall structure of this utility model; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the structure of the card connector in this utility model; Figure 5 This is an exploded view of the structure of sealing plate one and sealing plate two in this utility model.

[0014] In the diagram: 1. Sealing plate one; 101. First arc-shaped hole; 2. Sealing plate two; 201. Second arc-shaped hole; 202. Clamping tooth; 3. Rotating shaft; 4. Clamping component; 401. U-shaped spring sheet; 402. Clamping block; 5. Fixed shaft; 6. Fixed assembly; 601. Fixed bracket; 602. Locking screw; 7. U-shaped silicone strip; 8. Foot pad; 9. Adapter groove; 10. Mounting hole. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Please see Figure 1-5 A box-type transformer inlet and outlet cable sealing device includes a first sealing plate 1 and a second sealing plate 2 hinged together by a rotating shaft 3. The first sealing plate 1 and the second sealing plate 2 together form an adapter groove 9 for clamping the cable. The first sealing plate 1 has a first arc-shaped hole 101 with the rotating shaft 3 as the center, and the second sealing plate 2 has a second arc-shaped hole 201 with the rotating shaft 3 as the center. The first arc-shaped hole 101 and the second arc-shaped hole 201 are arranged opposite to each other. A fixed shaft 5 is fixedly provided at the end of the first arc-shaped hole 101. A snap-fit ​​member 4 is sleeved on the fixed shaft 5. The snap-fit ​​member 4 includes a U-shaped spring sheet 401. The U-shaped spring sheet 401 is partially housed in the first arc-shaped hole 101, and its open end extends into the second arc-shaped hole 201. The two opposite inner walls of the second arc-shaped hole 201 are provided with locking teeth 202 distributed in an arc shape with the rotating shaft 3 as the center; The U-shaped spring sheet 401 has locking blocks 402 on both sides that engage with the locking teeth 202, forming a one-way locking mechanism: when the first sealing plate 1 and the second sealing plate 2 rotate relative to each other to reduce the fitting groove 9, the locking blocks 402 can slide past the locking teeth 202; when rotated in the opposite direction, the locking blocks 402 engage and lock with the locking teeth 202; by pinching the open end of the U-shaped spring sheet 401, the locking blocks 402 can be separated from the locking teeth 202 to release the lock.

[0017] It should be noted that the first arc-shaped hole 101 and the second arc-shaped hole 201 provide the movement trajectory for the U-shaped spring plate 401, while the engagement of the locking teeth 202 and the locking block 402 constitutes a reliable mechanical lock. When clamping the cable, the locking block 402 slides along the inclined surface of the locking teeth 202, making a "clicking" sound, providing clear operational feedback; when an external force attempts to pry open the sealing plate, the locking block 402 will lock tightly against the vertical surface of the locking teeth 202, forming a self-locking mechanism. This design achieves a balance between rapid, stepless adjustment and secure locking.

[0018] In this embodiment, the first sealing plate 1 and the second sealing plate 2 are the same size.

[0019] It should be noted that designing the first sealing plate 1 and the second sealing plate 2 to be the same size simplifies the manufacturing process.

[0020] In this embodiment, the first sealing plate 1 is located above the second sealing plate 2, and the bottom of the first sealing plate 1 is provided with a foot pad 8 that is at the same height as the bottom surface of the second sealing plate 2.

[0021] It should be noted that the foot pads 8 are designed to improve the stability and flatness of the entire device after installation. By setting the foot pads 8 at the same height as the bottom surface of the second sealing plate 2, the first sealing plate 1 can form a stable support surface together with the second sealing plate 2 after closing, effectively preventing shaking caused by uneven force.

[0022] In this embodiment, both the first sealing plate 1 and the second sealing plate 2 are provided with mounting holes 10.

[0023] It should be noted that the mounting holes 10 are used to securely install the entire sealing device onto the tank wall of the box-type transformer using bolts or other fasteners. Mounting holes 10 are provided on both the first sealing plate 1 and the second sealing plate 2, forming a multi-point distributed fixing system. This greatly enhances the connection strength between the device and the tank, effectively preventing the entire sealing device from loosening due to cable stress or external vibration, and ensuring long-term operational reliability.

[0024] In this embodiment, a fixing component 6 is installed on the first sealing plate 1 above the first arc-shaped hole 101. The fixing component 6 includes a fixing bracket 601 and a locking screw 602. The fixing bracket 601 is mounted above the first arc-shaped hole 101. The locking screw 602 is threadedly connected to the fixing bracket 601, and its lower end can extend into the opening of the U-shaped spring sheet 401 to restrict the U-shaped spring sheet 401 from being pinched.

[0025] It should be noted that this fixing component 6 serves as a crucial safety mechanism. After the device is locked, screwing in the locking screw 602 so that its lower end abuts against the inside of the opening of the U-shaped spring plate 401 completely prevents the spring plate from being accidentally clamped, thus eliminating the risk of abnormal unlocking. This is essential for installations in vibrating environments or where preventing misoperation is required, significantly enhancing the safety level of the equipment.

[0026] In this embodiment, the inner wall of the adapter groove 9 is provided with a U-shaped silicone strip 7 for enhancing sealing and cushioning.

[0027] It should be noted that the U-shaped silicone strip 7 serves multiple purposes. First, its soft material allows it to closely conform to cables of different diameters and surface roughness, forming an elastic sealing barrier that effectively blocks moisture, dust, and small animals. Second, the silicone strip provides excellent cushioning and shock absorption, absorbing minor vibrations of the cable, protecting the cable insulation from mechanical damage, and also reducing the clamping force on the cable during tightening, preventing damage.

[0028] Working Principle: During installation, the cable is first placed in the adapter groove 9 enclosed by the two sealing plates. The operator pinches the first sealing plate 1 and the second sealing plate 2 in one direction, causing them to rotate relative to each other around the rotating shaft 3. The diameter of the adapter groove 9 then decreases to grip the cable tightly. During this process, the U-shaped spring plate 401 fixed on the first sealing plate 1 moves accordingly, and the locking blocks 402 on both sides slide across the inclined surface of the locking teeth 202 of the second arc-shaped hole 201, making a "clicking" sound, achieving rapid and stepless adjustment. When an external force attempts to open the sealing plate in the opposite direction, the locking blocks 402 will engage and lock with the vertical surface of the locking teeth 202, forming a reliable one-way self-locking mechanism to ensure that the cable is firmly clamped. Then, it is fixed to the box wall of the box-type transformer through the mounting hole 10. When disassembly is required, first loosen the bolts on the mounting hole 10, and then simply pinch the open end of the U-shaped spring plate 401 to disengage the locking blocks 402 from the locking teeth 202, and the sealing plate can be easily opened. In addition, tightening the locking screw 602 of the fixing component 6 can prevent accidental unlocking, while the U-shaped silicone strip 7 in the adapter groove 9 further enhances the sealing and cushioning effect.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sealing device for the incoming and outgoing cables of a box-type transformer, comprising a first sealing plate and a second sealing plate hinged together by a rotating shaft, wherein the first sealing plate and the second sealing plate together form an adapter groove for clamping the cable, characterized in that: The first sealing plate has a first arc-shaped hole centered on the rotating shaft, and the second sealing plate has a second arc-shaped hole centered on the rotating shaft. The first arc-shaped hole and the second arc-shaped hole are arranged opposite to each other. A fixed shaft is fixedly provided at the end of the first arc-shaped hole, and a snap-fit ​​component is fitted on the fixed shaft. The snap-fit ​​component includes a U-shaped spring sheet, which is partially accommodated in the first arc-shaped hole and its open end extends into the second arc-shaped hole. The two opposite inner walls of the second arc-shaped hole are provided with locking teeth arranged in an arc shape with the rotating shaft as the center; The U-shaped spring sheet has locking blocks on both sides that engage with the locking teeth, forming a one-way locking mechanism: when the first sealing plate and the second sealing plate rotate relative to each other to reduce the fitting groove, the locking blocks can slide past the locking teeth; when rotated in the opposite direction, the locking blocks engage and lock with the locking teeth; by pinching the open end of the U-shaped spring sheet, the locking blocks can be separated from the locking teeth to release the lock.

2. The sealing device for the incoming and outgoing cables of a box-type transformer according to claim 1, characterized in that: The first sealing plate and the second sealing plate are the same size.

3. The sealing device for the incoming and outgoing cables of a box-type transformer according to claim 1, characterized in that: The first sealing plate is located above the second sealing plate, and the bottom of the first sealing plate is provided with a foot pad that is at the same height as the bottom surface of the second sealing plate.

4. The sealing device for the incoming and outgoing cables of a box-type transformer according to claim 1, characterized in that: Both the first and second sealing plates have mounting holes.

5. The sealing device for the incoming and outgoing cables of a box-type transformer according to claim 1, characterized in that: A fixing component is installed on the first sealing plate above the first arc-shaped hole. The fixing component includes a fixing bracket and a locking screw. The fixing bracket is mounted above the first arc-shaped hole. The locking screw is threadedly connected to the fixing bracket, and its lower end can extend into the opening of the U-shaped spring sheet to restrict the U-shaped spring sheet from being pinched.

6. The sealing device for the incoming and outgoing cables of a box-type transformer according to claim 1, characterized in that: The inner wall of the adapter groove is provided with a U-shaped silicone strip for enhancing sealing and cushioning.

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