Integrated environmental protection cabinet composite bushing with current voltage sampling

Abstract

The utility model discloses a take current voltage sampling's integrated environmental protection cabinet composite sleeve pipe relates to electric property fitting technical field, and the scheme realizes current voltage sampling simultaneously through the integrated design of built -in copper bar, shielding copper screen layer and mutual -inductor coil, need not additional configuration independent mutual -inductor, and the equipment purchase cost is reduced greatly, and the mutual -inductor is integrated in the sleeve inside, spares the installation space of traditional rear -loaded mutual -inductor, adapts miniaturization power distribution demand, and shielding copper screen layer can shield internal electric field interference, reduces partial discharge risk, and cooperation embedded part one accurate lead -out voltage signal, and mutual -inductor fixing frame ensures the coupling accuracy of mutual -inductor coil and built -in copper bar, and extension frame and embedded part two stable transmission current signal, avoid the sampling error caused by the component deviation, and simultaneously, the corrugated dust -shielding fan blade and side magneticity attract strip composition protection structure, can effectively block the dust impurity accumulation of the rectangular assembly board surface of the hoop outer ring connection.

Description

Technical Field

[0001] This utility model relates to the field of electrical accessories technology, and in particular to an integrated environmental protection cabinet composite sleeve with current and voltage sampling. Background Technology

[0002] In power distribution systems, environmentally friendly gas ring main units are widely used in urban power distribution networks, industrial park power supply, and other scenarios due to their small size, excellent insulation performance, and adaptability to complex environments. Composite bushings, as the core component connecting the ring main unit to external lines, undertake the basic functions of insulation isolation, current transmission, and status monitoring. Their performance directly affects the operational stability and maintenance efficiency of the ring main unit.

[0003] A composite sleeve, patented in China (CN202454355U), primarily addresses the problems of inconvenient processing, easy detachment of copper rods, poor insulation performance, and susceptibility to puncture in existing sleeves. The composite sleeve comprises a conductor and a sleeve, wherein the sleeve is integrally injection molded between the two ends of the conductor on its outer surface. The conductor and the sleeve are made of glass fiber epoxy resin composite material. Furthermore, threaded portions are provided at both ends of the conductor.

[0004] Traditional composite bushings only have basic insulation and current transmission functions. They can only determine whether the power supply is connected through a simple live display device, and cannot accurately obtain the specific values ​​of voltage and current. If it is necessary to monitor these two core electrical parameters, separate voltage transformers and current transformers need to be configured, which not only increases the complexity of the equipment, but also requires reserving space for transformer installation in the ring main unit, resulting in insufficient adaptability. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an integrated environmental protection cabinet composite sleeve with current and voltage sampling, which solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an integrated environmental protection cabinet composite bushing with current and voltage sampling, comprising a composite bushing body, an inner copper rod fixedly connected to the inner end of the composite bushing body, a shielding copper mesh layer sleeved on the outer end of the inner copper rod, an insert fixedly connected to the upper left side of the composite bushing body, a current transformer fixing frame symmetrically fixedly connected to the front and rear sides of the left inner wall of the composite bushing body, a current transformer coil fixedly connected to the right end of the current transformer fixing frame, two current transformer coils respectively located on the front and rear sides of the shielding copper mesh layer, an extension frame fixedly connected to the left end of the current transformer fixing frame, an insert fixedly connected to the outer end of the extension frame, a plurality of epoxy resin fillers filling the inner end of the composite bushing body, and a clamp outer ring threadedly connected to the outer end of the composite bushing body.

[0007] As a further technical solution of this utility model, a rectangular assembly plate is fixedly connected to the outer end of the outer ring of the clamp, and the outer end of the rectangular assembly plate is provided with multiple threaded mounting holes.

[0008] As a further technical solution of this utility model, the multiple threaded mounting holes are arranged in a rectangular pattern, and the outer end of the outer ring of the clamp is threaded with a circular sliding rail.

[0009] As a further technical solution of this utility model, a pair of extension strips are provided at the outer end of the circular sliding rail, and the extension strips located on the rear side are fixedly connected to the circular sliding rail.

[0010] As a further technical solution of this utility model, the extension strip on the other side and the circular sliding rail are slidably connected, and a side magnetic suction strip is fixedly connected to the side end of the extension strip on the rear side.

[0011] As a further technical solution of this utility model, the two extension strips are magnetically connected by a side magnetic suction strip, and a corrugated dust-proof fan blade is fixedly connected between the two extension strips.

[0012] As a further technical solution of this utility model, the corrugated dust-proof fan blades cover the surface of the rectangular assembly plate, and the threaded mounting holes are threaded with bolt strip columns.

[0013] As a further technical solution of this utility model, several epoxy resin fillers are covered and hardened outside the built-in copper rod and the shielding copper mesh layer.

[0014] This utility model provides an integrated environmental protection cabinet composite sleeve with current and voltage sampling, which has the following advantages compared with the prior art:

[0015] This design features an integrated environmental protection cabinet composite bushing with current and voltage sampling. This solution achieves simultaneous current and voltage sampling through an integrated design of a built-in copper rod, a shielding copper mesh layer, and a current transformer coil. This eliminates the need for a separate current transformer, significantly reducing equipment procurement costs. Furthermore, the integration of the current transformer within the bushing saves installation space compared to traditional post-installed transformers, effectively reducing the size of the environmental protection cabinet's cable compartment and adapting to miniaturized power distribution needs. The shielding copper mesh layer protects against internal electric field interference, reducing the risk of partial discharge. Combined with insert one, it accurately extracts voltage signals. The current transformer mounting bracket ensures the coupling accuracy between the current transformer coil and the built-in copper rod. The extension bracket and insert two stably transmit current signals, avoiding sampling errors caused by component misalignment and ensuring the accuracy of voltage and current data. Simultaneously, the corrugated dust-proof fan and side magnetic suction strip form a protective structure that effectively prevents the accumulation of dust and impurities on the surface of the rectangular assembly plate connected to the outer ring of the clamp. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the composite sleeve body structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the composite sleeve body of this utility model;

[0018] Figure 3 For the present utility model Figure 2 A partially enlarged structural diagram of section A of the composite sleeve body;

[0019] Figure 4 This is a schematic diagram of the corrugated dust-proof fan blade in use according to this utility model.

[0020] In the picture:

[0021] 1. Composite bushing body; 2. Clamp outer ring; 3. Rectangular assembly plate; 4. Threaded mounting hole; 5. Shielding copper mesh layer; 6. Current transformer fixing bracket; 7. Current transformer coil; 8. Extension bracket; 9. Insert two; 10. Insert one; 11. Epoxy resin filler; 12. Extension strip plate; 13. Side magnetic suction strip; 14. Corrugated dustproof fan blade; 15. Built-in copper rod; 16. Circular sliding rail. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a composite bushing technology solution for an integrated environmental protection cabinet with current and voltage sampling: it includes a composite bushing body 1, an inner copper rod 15 fixedly connected to the inner end of the composite bushing body 1, a shielding copper mesh layer 5 sleeved on the outer end of the inner copper rod 15, an insert 10 fixedly connected to the upper left side of the composite bushing body 1, a transformer fixing frame 6 symmetrically fixedly connected to the front and rear sides of the left inner wall of the composite bushing body 1, a transformer coil 7 fixedly connected to the right end of the transformer fixing frame 6, two transformer coils 7 respectively located on the front and rear sides of the shielding copper mesh layer 5, an extension frame 8 fixedly connected to the left end of the transformer fixing frame 6, an insert 9 fixedly connected to the outer end of the extension frame 8, a plurality of epoxy resin fillers 11 filled the inner end of the composite bushing body 1, a clamp outer ring 2 threadedly connected to the outer end of the composite bushing body 1, and a plurality of epoxy resin fillers 11 covering and hardening the inner copper rod 15 and the shielding copper mesh layer 5.

[0024] Please see Figures 1-4A rectangular mounting plate 3 is fixedly connected to the outer end of the outer ring 2 of the clamp. The outer end of the rectangular mounting plate 3 has multiple threaded mounting holes 4, which are arranged in a rectangular pattern. A circular sliding rail 16 is threadedly connected to the outer end of the outer ring 2 of the clamp. A pair of extension strips 12 are provided at the outer end of the circular sliding rail 16. The extension strip 12 on the rear side is fixedly connected to the circular sliding rail 16, and the extension strip 12 on the other side is slidably connected to the circular sliding rail 16. A side magnetic suction strip 13 is fixedly connected to the side end of the extension strip 12 on the rear side. The two extension strips 12 are magnetically connected through the side magnetic suction strip 13. A corrugated dust-proof fan 14 is fixedly connected between the two extension strips 12. The corrugated dust-proof fan 14 covers the surface of the rectangular mounting plate 3. A bolt strip column is threadedly connected to the threaded mounting hole 4.

[0025] To achieve external protection, the outer end of the clamp outer ring 2 is threadedly connected to a circular sliding rail 16. A pair of extension strips 12 at the outer end of the circular sliding rail 16 form a protective frame. The extension strip 12 on the other side is slidably connected to the circular sliding rail 16 and can move along the circular sliding rail 16. The side magnetic suction strip 13 fixed to the side end of the rear extension strip 12 can magnetically attract the other extension strip 12, realizing the closure and fixation of the two extension strips 12. The corrugated dust-proof fan 14 fixedly connected between the two extension strips 12 covers the surface of the rectangular assembly plate 3 when the two extension strips 12 are closed, preventing dust and impurities from adhering to the rectangular assembly plate 3 and the threaded mounting hole 4, thus avoiding affecting subsequent maintenance or installation. When it is necessary to operate on the rectangular assembly plate 3 or the threaded mounting hole 4, the two extension strips 12 can be separated, and the corrugated dust-proof fan 14 can be folded to expose the rectangular assembly plate 3. After the operation is completed, it can be closed again by the side magnetic suction strip 13 to restore the protective state.

[0026] The working principle of this utility model is as follows: In this scheme, the composite bushing body 1 serves as the overall frame, and the internally fixed copper rod 15 is the core channel for primary current transmission, providing a basic carrier for current sampling. The shielding copper mesh layer 5, on the one hand, shields the internal electric field, reducing the risk of partial discharge, and on the other hand, assists in voltage sampling in conjunction with related components. The insert 10 fixed on the upper left side of the composite bushing body 1 serves as the lead-out end of the voltage sampling signal, forming a key node of the voltage sampling circuit with the shielding copper mesh layer 5. To achieve current sampling, transformer mounting brackets 6 are symmetrically fixed on the front and rear sides of the left inner wall of the composite bushing body 1. The transformer mounting brackets 6 not only provide stable support for the transformer coil 7, but also ensure the installation position accuracy of the transformer coil 7. Two current transformer coils 7 are located on the front and rear sides of the shielded copper mesh layer 5, respectively, forming an electromagnetic induction coupling relationship with the built-in copper rod 15. When current flows through the built-in copper rod 15, the current transformer coil 7 generates a secondary current. The extension frame 8 fixed to the left end of the current transformer mounting bracket 6 connects the current transformer coil 7 to the insert 9. The insert 9 serves as the lead-out terminal for the secondary signal of current sampling, transmitting the secondary current generated by the current transformer coil 7 to the external measuring instrument to complete the current sampling function. Several epoxy resin fillers 11 filled inside the composite bushing body 1 wrap and fix the internal components such as the built-in copper rod 15, the shielded copper mesh layer 5, the current transformer mounting bracket 6, and the current transformer coil 7, while ensuring the insulation performance between the components and preventing internal short circuits or leakage. Regarding the installation and adaptation with the environmental protection cabinet, the outer end of the composite sleeve body 1 is connected to the outer ring 2 of the clamp via a thread. The outer ring 2 serves as a transition structure for external assembly. The rectangular assembly plate 3, which is fixedly connected to its outer end, provides the installation foundation for fixing the sleeve to the environmental protection cabinet. Multiple threaded mounting holes 4 are opened at the outer end of the rectangular assembly plate 3. By screwing the bolt strip into the threaded mounting holes 4 and connecting it to the corresponding mounting position of the environmental protection cabinet, the sleeve can be fixed on the environmental protection cabinet. The multiple threaded mounting holes 4 are arranged in a rectangular shape to ensure stability after installation. For external protection, the outer end of the clamp outer ring 2 is connected to a circular sliding rail 16 via a thread. A pair of extension strips 12 set at the outer end of the circular sliding rail 16 form a protective frame. The extension strip 12 on the other side is connected to the circular sliding rail 16. The sliding rail 16 is slidably connected and can move along the circular sliding rail 16. The side magnetic suction strip 13 fixed to the side end of the extension strip 12 located on the rear side can magnetically attract the other side extension strip 12 to achieve the closed fixation of the two extension strips 12. The corrugated dust-proof fan 14 fixedly connected between the two extension strips 12 covers the surface of the rectangular assembly plate 3 when the two extension strips 12 are closed, preventing dust and impurities from adhering to the rectangular assembly plate 3 and the threaded mounting hole 4, thus avoiding affecting subsequent maintenance or installation. When it is necessary to operate on the rectangular assembly plate 3 or the threaded mounting hole 4, the two side extension strips 12 can be separated and the corrugated dust-proof fan 14 can be folded to expose the rectangular assembly plate 3. After the operation is completed, it can be closed again by the side magnetic suction strip 13 to restore the protective state.

[0027] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. An integrated environmental protection cabinet composite sleeve with current and voltage sampling, characterized in that, The composite bushing body (1) is provided with an inner copper rod (15) fixedly connected to its inner end. A shielding copper mesh layer (5) is provided on the outer end of the inner copper rod (15). An insert (10) is fixedly connected to the upper left side of the composite bushing body (1). A transformer fixing frame (6) is symmetrically fixedly connected to the front and rear sides of the left inner wall of the composite bushing body (1). A transformer coil (7) is fixedly connected to the right end of the transformer fixing frame (6). The two transformer coils (7) are located on the front and rear sides of the shielding copper mesh layer (5). An extension frame (8) is fixedly connected to the left end of the transformer fixing frame (6). An insert (9) is fixedly connected to the outer end of the extension frame (8). The inner end of the composite bushing body (1) is filled with several epoxy resin fillers (11). A clamp outer ring (2) is threadedly connected to the outer end of the composite bushing body (1).

2. The integrated environmental protection cabinet composite sleeve with current and voltage sampling according to claim 1, characterized in that, The outer end of the outer ring (2) of the clamp is fixedly connected to a rectangular assembly plate (3), and the outer end of the rectangular assembly plate (3) is provided with multiple threaded mounting holes (4).

3. The integrated environmental protection cabinet composite sleeve with current and voltage sampling according to claim 2, characterized in that, The multiple threaded mounting holes (4) are arranged in a rectangular pattern, and the outer end of the outer ring (2) of the clamp is threadedly connected to a circular sliding rail (16).

4. The integrated environmental protection cabinet composite sleeve with current and voltage sampling according to claim 3, characterized in that, The outer end of the circular sliding rail (16) is provided with a pair of extension plates (12), and the extension plates (12) located on the rear side are fixedly connected to the circular sliding rail (16).

5. The integrated environmental protection cabinet composite sleeve with current and voltage sampling according to claim 4, characterized in that, The extension strip (12) located on the other side is slidably connected to the circular sliding rail (16), and a side magnetic suction strip (13) is fixedly connected to the side end of the extension strip (12) located on the rear side.

6. The integrated environmental protection cabinet composite sleeve with current and voltage sampling according to claim 5, characterized in that, The two extension strips (12) are magnetically connected by a side magnetic suction strip (13), and a corrugated dust-proof fan blade (14) is fixedly connected between the two extension strips (12).

7. The integrated environmental protection cabinet composite sleeve with current and voltage sampling according to claim 6, characterized in that, The corrugated dust-proof fan blade (14) covers the surface of the rectangular assembly plate (3), and the threaded mounting hole (4) is internally threaded with a bolt bar column.

8. The integrated environmental protection cabinet composite sleeve with current and voltage sampling according to claim 1, characterized in that, Several of the epoxy resin fillers (11) cover and harden over the built-in copper rod (15) and the shielding copper mesh layer (5).

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