Wiring fixing device, electrical equipment and transformer low-voltage side wiring method
By using the arc-shaped clamping piece and insulating pad design of the wiring fixing device, the problems of strong construction dependence and wire damage in the traditional binding method are solved, and fast, reliable wire installation and long-term stable connection are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-03-13
AI Technical Summary
The traditional binding method for connecting transformer low-voltage side outgoing lines to overhead lines or cables relies on the skills of construction personnel for construction quality, is difficult to standardize, and is prone to damaging the insulation layer of the conductors, posing potential risks of loosening and mechanical failure.
The wiring fixing device includes a first fixing part, a second fixing part, a connecting component and a limiting component. It achieves radial self-locking and uniform clamping through arc-shaped snap-fit pieces and an insulating pad layer, and uses threaded connections and snap-fit connections to ensure reliable fixing.
It enables fast and reliable wire installation, avoids wire damage, improves installation efficiency, and reduces the risk of mechanical failure.
Smart Images
Figure CN121663382A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power equipment technology, and in particular to a wiring fixing device, electrical equipment, and a wiring method for the low-voltage side of a transformer. Background Technology
[0002] In power distribution systems, the traditional binding method is commonly used for the connection between the low-voltage side outgoing line of a transformer and overhead lines or cables, such as the terminal fixing of 0.4kV conductors. This method uses aluminum tape or the same type of single-strand wire to tightly wrap and bind the conductor to a butterfly insulator, wire clamp, or terminal fixing plate.
[0003] However, this traditional method has many inherent drawbacks. Its construction quality is highly dependent on the skill and experience of the workers; the tightness, number of turns, and uniformity of the binding are difficult to standardize. Furthermore, excessively tight binding can damage the conductors, while excessively loose binding can easily lead to loose connections. Simultaneously, during the binding process, the metal binding wire may generate sharp friction or pressure with the conductors, especially insulated conductors, easily scratching or damaging the insulation layer. Bare conductors may also develop tiny dents, which could become potential sources of electrical faults or mechanical breakage over long-term operation. Summary of the Invention
[0004] This application proposes a wiring fixing device to effectively solve the technical problems in related technologies, such as low wiring efficiency on the low-voltage side of transformers and easy damage to conductors.
[0005] This application also proposes an electrical device including the above-mentioned wiring fixing device.
[0006] This application also proposes a method for wiring the low-voltage side of a transformer.
[0007] The first aspect of this application provides a wiring fixing device, including: a first fixing part, a second fixing part, a connecting component, and a limiting component;
[0008] The first fixing part and the second fixing part are used to cooperate to form a fixed cavity with an opening;
[0009] One end of the limiting component is disposed on the first fixing part, and the other end of the limiting component is used to be disposed on the second fixing part when the first fixing part and the second fixing part are engaged, so as to close the opening of the fixing cavity.
[0010] The connecting component is used to connect and fix the first fixing part and the second fixing part.
[0011] Furthermore, a limiting groove is formed on the second fixing part, and the other end of the first fixing part is used to be embedded in the limiting groove when the first fixing part and the second fixing part cooperate.
[0012] Furthermore, the first fixing part and the second fixing part are arc-shaped, the limiting groove is an arc-shaped slot formed along the contour of the second fixing part, and the limiting component is set as an arc-shaped snap-fit piece.
[0013] Furthermore, the surfaces of the first fixing part and the second fixing part used to form the fixing cavity are provided with anti-slip structures.
[0014] Furthermore, the anti-slip structure includes an anti-slip toothed structure and an insulating pad layer. The anti-slip toothed structure is formed on the surfaces of the first fixing part and the second fixing part, and the insulating pad layer is disposed on the anti-slip toothed structure.
[0015] Furthermore, the anti-slip tooth structure consists of staggered diamond-shaped protrusions or wavy protrusions;
[0016] And / or, the tips of the anti-slip toothed structure are smoothly transitioned;
[0017] And / or, the insulating liner layer is a rubber layer.
[0018] Furthermore, one end of the first fixing part is provided with a first connecting part, and one end of the second fixing part is provided with a second connecting part. The connecting component passes through the first connecting part and the second connecting part respectively and is pre-tightened by threads.
[0019] Furthermore, the other end of the first fixing part and the other end of the second fixing part are fixed by a snap-fit connection;
[0020] And / or, the connecting assembly includes a bolt, a first washer, a second washer, and a nut, the bolt being disposed through the first washer, the first connecting portion, the second connecting portion, and the second washer, and the nut being threaded pre-tightened onto the bolt.
[0021] A second aspect of this application provides an electrical device, including a wiring fixing device as described in the first aspect of this application.
[0022] A third aspect of this application provides a method for wiring the low-voltage side of a transformer, using a wiring fixing device as described in the first aspect of this application, including the following steps:
[0023] Determine the installation position on the low-voltage side terminal block of the transformer, and initially fix the first fixing part;
[0024] Place the ends of the three-phase low-voltage overhead conductors into the first fixing part of the corresponding phase, connect the other end of the second fixing part with the other end of the first fixing part, and set the limiting component on the second fixing part to achieve radial self-locking.
[0025] The connecting component is installed by passing through one end of the first fixing part and one end of the second fixing part, and then the subsequent electrical connection is completed.
[0026] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects: by assembling and fixing the wire with the first fixing part and the second fixing part, the limiting component can be gradually set on the second fixing part and put into place during the assembly process, so that the limiting component, the first fixing part and the second fixing part can form a fixed cavity with an adjustable size and achieve reliable radial self-locking of the wire. Finally, the first fixing part and the second fixing part are fixed by the connecting component, so as to achieve fast and reliable installation, improve installation efficiency, and prevent damage to the wire.
[0027] It is easy to understand that the electrical equipment in the second aspect embodiment of this application and the transformer low-voltage side wiring method in the third aspect embodiment of this application both have the same technical effects as the wiring fixing device in the first aspect embodiment, and therefore will not be described again.
[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of a structure provided for one embodiment of this application.
[0031] Figure label:
[0032] 100. First fixing part; 110. First connecting part;
[0033] 200. Second fixing part; 210. Second connecting part;
[0034] 300. Connecting assembly; 310. Bolt; 320. Second washer; 330. Nut;
[0035] 400, Limiting component; 410, Limiting groove. Detailed Implementation
[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0037] See Figure 1 As shown, an embodiment of the first aspect of this application discloses a wiring fixing device, including a first fixing part 100, a second fixing part 200, a connecting component 300, and a limiting component 400;
[0038] The first fixing part 100 and the second fixing part 200 are used to cooperate to form a fixed cavity with an opening; one end of the limiting member 400 is disposed on the first fixing part 100, and the other end of the limiting member 400 is used to be disposed on the second fixing part 200 when the first fixing part 100 and the second fixing part 200 are cooperated, so as to close the opening of the fixed cavity; the connecting assembly 300 is used to connect and fix the first fixing part 100 and the second fixing part 200.
[0039] In the embodiments of this application, the wire is fixed by assembling the first fixing part 100 and the second fixing part 200. The limiting part 400 can be gradually set on the second fixing part 200 and put into place during the assembly process, so that the limiting part 400, the first fixing part 100 and the second fixing part 200 can form a fixed cavity of adjustable size and achieve reliable radial self-locking of the wire. Finally, the first fixing part 100 and the second fixing part 200 are fixed by the connecting component 300, so as to achieve fast and reliable installation, improve installation efficiency and prevent damage to the wire.
[0040] Understandably, the wire is placed in the first fixing part 100, and the second fixing part 200 is assembled with the first fixing part 100 to form a fixed cavity with an opening. One end of the limiting member 400 is fixed to the first fixing part 100, and the other end is gradually set on the second fixing part 200 as the first fixing part 100 and the second fixing part 200 are assembled, thereby achieving the effect of closing the cavity opening to prevent the wire from coming out. When the connecting component 300 tightens the first fixing part 100 and the second fixing part 200, the adjustable fixed cavity shrinks radially to form a uniform clamping force on the wire, achieving the effect of ensuring the reliability of the fixation while avoiding excessive local pressure that could damage the wire.
[0041] In some embodiments, one end of the limiting member 400 is disposed on the first fixing part 100, and the other end gradually contacts and is disposed on the second fixing part 200 as the first fixing part 100 and the second fixing part 200 are engaged. The disposal method can be embedded, abutted, or slidably connected, so that the opening of the fixing cavity is closed when it contacts the second fixing part 200, and the size of the fixing cavity is adjusted during the disposal process until the wire can be radially limited, thereby achieving fast, reliable, non-destructive and standardized installation and fixing of wires of different diameters.
[0042] Furthermore, the first fixing part 100 and the second fixing part 200 can be initially fitted together to form a fixing cavity through threaded connection, snap-fit connection, or pin connection, and then the first fixing part 100 and the second fixing part 200 are fixedly connected by the connecting assembly 300 to ensure the reliability of the connection. Specifically, the connecting assembly 300 can also fix the first fixing part 100 and the second fixing part 200 through common mechanical connections. For example, a threaded connection is used to achieve fixation and provide sufficient thread preload, thereby further improving the quality of the connection.
[0043] The following will combine Figure 1 The wiring fixing device disclosed in the embodiments of this application will be explained and described in detail.
[0044] In some embodiments of this application, a limiting groove 410 is formed on the second fixing part 200, and the other end of the first fixing part 100 is used to be embedded in the limiting groove 410 when the first fixing part 100 and the second fixing part 200 are engaged. It can be understood that the limiting groove 410 of the second fixing part 200 provides an embedding reference for the first fixing part 100. By guiding and limiting the setting of the first fixing part 100, it is ensured that the first fixing part 100 and the second fixing part 200 are quickly aligned and without offset when assembled. Then, the two fixing parts are fastened by the connecting component 300, so that the fixing cavity shrinks uniformly in the radial direction, generating a stable radial self-locking force, which not only ensures the assembly accuracy, but also enhances the clamping reliability and avoids damage to the wires.
[0045] In some embodiments, after the first fixing part 100 is embedded in the limiting groove 410, the first fixing part 100 and the second fixing part 200 form a preliminary positioning, thereby facilitating the locking operation of the connecting component 300 and improving the operation efficiency.
[0046] In some embodiments, for example, the first fixing part 100 and the second fixing part 200 are arc-shaped, the limiting groove 410 is an arc-shaped slot formed along the contour of the second fixing part 200, and the limiting component 400 is set as an arc-shaped snap-fit piece. It can be understood that the first fixing part 100 and the second fixing part 200 adopt an arc-shaped structure to adapt to the circular contour of the wire. With the arc-shaped limiting groove 410 along the contour of the second fixing part 200, the first fixing part 100 forms a smooth arc-shaped guide when it is inserted, quickly aligns and forms an arc-shaped fixing cavity that fits the wire. The arc-shaped snap-fit piece, as the limiting component 400, fits the contour of the second fixing part 200 and snaps in during the assembly process, closing the cavity opening. When the connecting component 300 is locked, the arc-shaped cavity shrinks evenly in the radial direction, generating a circumferential clamping force to ensure the reliability of the fixation.
[0047] In some embodiments, the arc-shaped snap-fit piece is a rectangular protrusion, the first fixing part 100 and the second fixing part 200 are respectively a first U-shaped ring and a second U-shaped ring, the second U-shaped ring is a movable fastener, its shape matches the first U-shaped ring, and the inner arc surface is machined with a groove that complements the shape of the arc-shaped snap-fit piece at the corresponding position; when the second U-shaped ring is fastened onto the first U-shaped ring and gradually locked, the arc-shaped snap-fit piece can be accurately embedded into the groove, effectively resisting the radial shear force caused by the tension of the wire, preventing the two rings from being misaligned laterally, and ensuring uniform pressure transmission.
[0048] It is understandable that the wiring fixing components in related technologies are prone to wire wear after long-term use, resulting in low durability. To address this, in some embodiments of this application, the surfaces of the first fixing part 100 and the second fixing part 200 used to form the fixing cavity are provided with anti-slip structures (not shown in the figures).
[0049] It is understandable that the arc-shaped cavity surfaces of the first fixing part 100 and the second fixing part 200 are provided with anti-slip structures such as anti-slip textures, protrusions or anti-slip layers. When they fully fit with the circular outline of the wire, the contact stability is enhanced by increasing the coefficient of friction. This effectively resists axial slippage caused by wire pulling or vibration after installation or during use. Furthermore, the anti-slip friction force and the radial self-locking force are superimposed, which can further improve the fixation stability for long-term use.
[0050] In some embodiments, for example, the anti-slip structure includes an anti-slip serrated structure and an insulating pad layer. The anti-slip serrated structure is formed on the surfaces of the first fixing part 100 and the second fixing part 200, and the insulating pad layer is disposed on the anti-slip serrated structure. It is understood that the anti-slip serrated structure, through the elastic fit of the insulating pad layer, forms mechanical engagement points to increase the sliding resistance of the conductor; the high coefficient of friction of the insulating pad layer itself further enhances the anti-slip effect, and the insulating pad layer, such as being made of rubber or silicone, has elastic deformation capability, which can buffer the local pressure of the anti-slip serrations and prevent direct compression by the serrations from causing damage to the conductor insulation layer or deformation of the conductor.
[0051] For example, in some embodiments, the anti-slip serration structure consists of staggered diamond-shaped or wavy protrusions. It is understood that the staggered diamond-shaped or wavy protrusions form staggered engagement points, preventing wire displacement in multiple directions, including axial and radial directions, thus improving the anti-slip effect. Specifically, the staggered distribution means that the serrations are not simply parallel lines, but rather staggered like fish scales or waves. This layout achieves multi-directional anti-slip; the diamond or wavy shape provides a larger effective friction area and better stress distribution than a straight line.
[0052] Furthermore, the anti-slip tooth structure features a smooth transition at the tooth tips; it can be understood that a smooth transition at the tooth tips refers to rounding the metal tooth tips during machining and subsequent pre-curing treatment, for example, to R0.2mm, to ensure that even if the rubber pad wears in extreme cases, the metal tooth tips will not form a cutting edge.
[0053] In some embodiments, the insulating gasket layer is a rubber layer. It is understood that the insulating gasket is a rubber layer firmly bonded to the first fixing part 100 and the second fixing part 200 through a high-temperature vulcanization process. In some embodiments, the thickness of the rubber layer is 1.5-3 mm.
[0054] Furthermore, the specific steps of the high-temperature vulcanization process are as follows: 1) The inner walls of the first fixing part 100 and the second fixing part 200 are sandblasted, cleaned, and coated with a special adhesive primer; 2) The unvulcanized compounded rubber sheet is pre-formed and wrapped around the treated inner walls of the first fixing part 100 and the second fixing part 200; 3) It is placed in a high-temperature vulcanization mold and kept at a temperature of 150-180°C and a pressure of 10-15MPa for a certain period of time to allow the rubber to undergo a cross-linking reaction, and at the same time, it forms a strong chemical-physical bond with the first fixing part 100 and the second fixing part 200 of the metal matrix through the adhesive. This process results in high bonding strength and the gasket is not easy to fall off. Among them, a thickness of 1.5-3mm is the optimal range verified by experiments. When the thickness is <1.5mm, the buffering and protection capacity is insufficient; when the thickness is >3mm, the rubber is too soft and may undergo excessive creep under long-term pressure, affecting the long-term clamping force.
[0055] Furthermore, the outer surface of the insulating pad is laminated with a peelable protective film. This protective film, made of polyethylene (PE) or polyester (PET), is adhered to the surface of the vulcanized insulating pad using a low-tack pressure-sensitive adhesive. Its function is to prevent dust and oil contamination of the rubber surface (contamination reduces the coefficient of friction) before storage, transportation, and installation, and to avoid mechanical scratches during handling. During installation, workers simply peel it off to expose a clean, high-friction rubber working surface.
[0056] It should be noted that the anti-slip serrations and insulating pads are the core components for achieving reliable clamping and conductor protection. Dense and continuous anti-slip serrations are machined on the inner arc surfaces of the first and second U-shaped rings. Before the pads are installed, these serrations are sharp metal teeth. Then, through a high-temperature vulcanization process, a layer of rubber material is firmly wrapped around the entire inner arc surface and the serrations to form an insulating pad. After vulcanization, the rubber fills the tooth valleys, and the tooth tips are wrapped by the rubber, making the metal serrations a skeleton that strengthens the internal structure of the pad, while the outer surface is a complete and smooth rubber layer. This allows the device to adapt to different conductor diameters and protect the conductors through the elastic deformation of the rubber layer, while also providing an ultimate anti-slip friction force far exceeding that of a pure rubber pad through the internal serration skeleton.
[0057] In some embodiments of this application, one end of the first fixing part 100 is provided with a first connecting part 110, and one end of the second fixing part 200 is provided with a second connecting part 210. The connecting component 300 passes through the first connecting part 110 and the second connecting part 210 respectively and is pre-tightened by threads. It can be understood that the first connecting part 110 and the second connecting part 210 are mated, and the threaded pre-tightening member passes through the first connecting part 110 and the second connecting part 210. An adjustable pre-tightening force is applied by tightening the threads, driving the first fixing part 100 and the second fixing part 200 to contract synchronously, so that the fixing cavity clamps the wire evenly in the radial direction. At the same time, the limiting component 400 is embedded in the arc-shaped limiting groove 410 to ensure that the assembly is not offset. The clamping force is precisely controlled by rotating the threaded pre-tightening member, which can adapt to wires of different diameters and materials, avoid slippage due to excessive looseness or insulation damage due to excessive tightness, and greatly improve the versatility of the device.
[0058] In some embodiments, the other end of the first fixing part 100 and the other end of the second fixing part 200 are fixed by a snap-fit connection; it can be understood that one end of the first fixing part 100 and the second fixing part 200 are controlled by a threaded pre-tightening assembly, and the other end is quickly snapped and fixed by a snap-fit connection, thereby achieving the effect of ensuring installation efficiency.
[0059] In some embodiments, the other end of the first fixing part 100 and the other end of the second fixing part 200 are fixed by a snap-fit connection, and after one end is locked by the connecting component 300, the connection between the other end of the first fixing part 100 and the other end of the second fixing part 200 can be further reinforced and anti-loosening treated, so as to meet the needs of long-term use while ensuring appropriate radial limiting of the wire.
[0060] In some embodiments, the connecting assembly 300 includes a bolt 310, a first washer (not shown), a second washer 320, and a nut 330. The bolt 310 passes through the first washer, the first connecting portion 110, the second connecting portion 210, and the second washer 320. The nut 330 is threadedly pre-tightened onto the bolt 310. It is understood that the two washers respectively conform to the surfaces of the first connecting portion 110 and the second connecting portion 210, dispersing the pre-tightening pressure to prevent deformation of the connecting portion; the threaded engagement provides an adjustable radial clamping force, driving the other end of the first fixing portion 100 and the other end of the second fixing portion 200 to contract synchronously, and the snap-fit connection at one end ensures the closure of the fixing cavity; simultaneously, the pre-tightening force is transmitted through the first fixing portion 100 and the second fixing portion 200 to the anti-slip teeth and the insulating liner, allowing them to elastically engage the wire, ensuring clamping reliability while preventing damage to the wire and the connecting portion.
[0061] In some embodiments, the connecting assembly 300 serves as a fastening assembly, including an extended bolt 310, a flat washer, and a lock nut 330; the extended bolt 310 passes sequentially through the concentric mounting holes of the second U-ring and the first U-ring; when the lock nut 330 is tightened, it drives the second U-ring to move closer to the first U-ring, compressing the insulating gasket in the middle to hold the wire tightly; the tail of the bolt 310 is designed with an extended end, which still protrudes beyond the nut 330 after tightening.
[0062] In some embodiments, the extended end of the extended bolt 310 is at least 50 mm long, and its surface is provided with a color ring mark to indicate that it is properly tightened, thereby achieving low-cost and efficient visual quality control. Furthermore, the length of at least 50 mm ensures sufficient length for reliable binding of the drain line after the main line is tightened, typically requiring more than 5 turns or the installation of a small clamp. The color ring mark is a permanent colored ring, such as green, sprayed or printed at a specific location after the bolt 310 is machined; its position is determined based on the calculated tightening torque. When the nut 330 is tightened until the color ring is fully exposed, it indicates that the bolt elongation has reached the predetermined value, indirectly indicating that the tightening torque has met the standard.
[0063] The second aspect of this application discloses an electrical device, which may be an electrical device used on the low-voltage side of a transformer in a power distribution system. The electrical device includes: the wiring fixing device of the first aspect of this application.
[0064] The transformer low-voltage side wiring method according to the third aspect of this application, using the wiring fixing device according to the first aspect of this application, includes the following steps:
[0065] Determine the installation position on the low-voltage side terminal block of the transformer, and initially fix the first fixing part 100;
[0066] The ends of the three-phase low-voltage overhead conductors are placed in the first fixing part 100 of the corresponding phase, the other end of the second fixing part 200 is mated with the other end of the first fixing part 100, and the limiting part 400 is set on the second fixing part 200 to achieve radial self-locking.
[0067] The connecting component 300 is installed by passing through one end of the first fixing part 100 and one end of the second fixing part 200, and then the subsequent electrical connection is completed.
[0068] It is easy to understand that the electrical equipment in the second aspect embodiment of this application and the transformer low-voltage side wiring method in the third aspect embodiment of this application both have the same technical effects as the wiring fixing device in the first aspect embodiment, and therefore will not be described again.
[0069] The wiring fixing device, electrical equipment, and transformer low-voltage side wiring method of this application are described in detail below with a specific embodiment. It should be noted that the following embodiment is only an exemplary description and should not be construed as limiting the embodiments of this application.
[0070] See Figure 1 As shown in the figure, the wiring fixing device, electrical equipment and transformer low-voltage side wiring method of this embodiment, the wiring fixing device specifically relates to a wiring and fixing device for the low-voltage side outgoing line of the distribution transformer or the terminal conductor of the low-voltage overhead line, including a first fixing part 100, a second fixing part 200 and a connecting component 300.
[0071] The first fixing part 100 is a first U-shaped ring, and the second fixing part 200 is a second U-shaped ring. The top of the first U-shaped ring is provided with an integrally formed connecting piece as a first connecting part 110, and the top of the second U-shaped ring is provided with an integrally formed connecting structure as a second connecting part 210. The connecting piece and the connecting structure are provided with mounting holes for connection. The first U-shaped ring and the second U-shaped ring are detachably connected, and the first U-shaped ring is provided with a snap-fit part, and the second U-shaped ring is provided with a slot that matches the snap-fit part. When the first U-shaped ring and the second U-shaped ring are circumferentially aligned, the snap-fit part is embedded in the slot, thereby forming a radial limit.
[0072] Furthermore, continuous anti-slip serrations are provided on the inner arc surfaces of the first U-ring and the second U-ring, which are arranged opposite to each other; the insulating pad covers the inner arc surfaces and anti-slip serrations of the first U-ring and the second U-ring, thereby forming an insulating protective layer that contacts the conductor.
[0073] In some embodiments, one end of the first U-ring and the second U-ring are fastened together, and the other end is detachably connected by a connecting assembly 300. The connecting assembly 300 includes an extension bolt 310, two flat washers, and a nut 330. The extension bolt 310 passes sequentially through the mounting hole of the connecting piece in the first U-ring, the mounting hole of the mounting structure in the second U-ring, and the two flat washers, and is locked in place by the nut 330. The end of the extension bolt 310 is provided with a head end for tool operation, and the part of the extension bolt 310 extending out of the lock nut 330 constitutes the extension end.
[0074] In the specific implementation process, the following steps are described:
[0075] Step 1: Preparation. Construction personnel should bring at least three wiring fixing devices according to this application (corresponding to phases A, B, and C respectively), as well as matching socket wrenches, electric wrenches, fixing bolts 310, etc. Inspect the devices; the protective film on the surface of the insulating pad should be intact.
[0076] Step Two: Pre-fixing the Devices. First, determine the installation positions on the low-voltage side terminal blocks of the transformer. Initially fix the first U-ring of each device to the terminal block.
[0077] Step 3: Place the conductors and engage the locking clips. Place the ends of the three-phase low-voltage overhead conductors into the corresponding arc grooves of the first U-ring. Then, pick up the second U-ring and press it down, aligning it with the first U-ring. At the moment of engagement, you can clearly feel the aluminum alloy forged locking part on the first U-ring inserting into the groove of the second U-ring, producing a slight clicking sound, indicating that the device achieves radial self-locking.
[0078] Step Four: Insert Bolt 310 and Tighten via Visual Inspection. Insert the extended bolt 310 from above the second U-ring, passing it sequentially through the flat washer, the second U-ring, the first U-ring, the connecting piece, and then place the flat washer again. Finally, screw on the lock nut 330. Connect the socket wrench to the electric wrench and place it over the head of the bolt 310 to begin tightening. The operator observes the extended end of the bolt 310 and stops immediately when the green ring mark is fully exposed from the upper edge of the lock nut 330. This indicates that the tightening torque has reached the preset standard and the wire has been reliably clamped. The high-temperature vulcanized insulating gasket is evenly compressed, and the internal wavy anti-slip serrations provide significant static friction through the rubber layer.
[0079] Step 5: Connecting and Finalizing the Lead-in Wires. After the main line is fixed, the extended ends of all three phase conductors should be exposed by approximately 60mm. The installers will tightly wrap the prefabricated copper lead-in wires (used to connect to the next-level switchgear) around the corresponding phase's extended end and tighten the ends with pliers to complete the electrical connection. Finally, all pre-installed fixing bolts 310 will be fully tightened to securely connect the entire device to the terminal block.
[0080] After construction was completed, an inspection revealed that the three-phase wiring was neat and uniform, with no damage to the wire insulation. Compared with the traditional binding method, installation time was reduced by more than 70%. Subsequent year-long monitoring, including regular inspections using an infrared thermal imager, showed that the temperature of all connection points was normal and the three phases were balanced, with no loosening or overheating observed. The drain wire connections were also stable and reliable.
[0081] It is understood that the wiring fixing device in this application adopts a modular mechanical structure, and the installation process is simplified to three standardized steps: placing the wire, engaging the clips, and tightening the bolts 310. Compared with the hard contact between the traditional metal binding wire and the wire, this application sets an integrally vulcanized insulating rubber pad between the wire and the metal clip. This pad acts as an elastic buffer medium, evenly distributing the tightening force and avoiding any local sharp pressure. Secondly, the anti-slip serrations on the inner wall of the U-shaped ring are designed as smoothly transitioned protrusions. Their function is to increase friction through the pad, ensuring the tightening effect while achieving non-destructive installation of the wire insulation layer and even the metal body, thus optimizing the hidden defects such as scratches and indentations generated during the installation process.
[0082] It should be noted that traditional binding methods are prone to loosening due to metal creep and vibration. This device ensures reliability through a dual design: first, the anti-slip toothed pattern and insulating pad system provides anti-slip static friction to prevent the wires from being pulled out; second, the unique radial limiting structure of the snap-fit part and the slot effectively ensures that the pressure is always applied evenly, giving the connection point the ability to resist wind vibration and thermal expansion and contraction, and ensuring stable contact resistance under long-term operation, reducing the risk of overheating caused by loosening.
[0083] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0084] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. It should be noted that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Similarly, at least one of A or B can also represent: A alone, A and B simultaneously, or B alone.
[0085] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0086] In the foregoing description of this specification, references to terms such as "one embodiment," "another embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
Claims
1. A wiring fixing device, characterized in that, include: First fixing part, second fixing part, connecting assembly and limiting component; The first fixing part and the second fixing part are used to cooperate to form a fixed cavity with an opening; One end of the limiting component is disposed on the first fixing part, and the other end of the limiting component is used to be disposed on the second fixing part when the first fixing part and the second fixing part are engaged, so as to close the opening of the fixing cavity. The connecting component is used to connect and fix the first fixing part and the second fixing part.
2. The wiring fixing device according to claim 1, characterized in that: A limiting groove is formed on the second fixing part, and the other end of the first fixing part is used to be embedded in the limiting groove when the first fixing part and the second fixing part cooperate.
3. The wiring fixing device according to claim 2, characterized in that: The first fixing part and the second fixing part are arc-shaped, the limiting groove is an arc-shaped slot formed along the contour of the second fixing part, and the limiting component is set as an arc-shaped snap-fit piece.
4. The wiring fixing device according to claim 1, characterized in that: The surfaces of the first fixing part and the second fixing part that form the fixing cavity are provided with anti-slip structures.
5. The wiring fixing device according to claim 4, characterized in that: The anti-slip structure includes an anti-slip toothed structure and an insulating pad layer. The anti-slip toothed structure is formed on the surfaces of the first fixing part and the second fixing part, and the insulating pad layer is disposed on the anti-slip toothed structure.
6. The wiring fixing device according to claim 5, characterized in that: The anti-slip toothed structure consists of staggered diamond-shaped protrusions or wavy protrusions; And / or, the tips of the anti-slip toothed structure are smoothly transitioned; And / or, the insulating liner layer is a rubber layer.
7. The wiring fixing device according to claim 1, characterized in that: One end of the first fixing part is provided with a first connecting part, and one end of the second fixing part is provided with a second connecting part. The connecting component passes through the first connecting part and the second connecting part respectively and is pre-tightened by threads.
8. The wiring fixing device according to claim 7, characterized in that: The other end of the first fixing part and the other end of the second fixing part are fixed by a snap-fit connection; And / or, the connecting assembly includes a bolt, a first washer, a second washer, and a nut, the bolt being disposed through the first washer, the first connecting portion, the second connecting portion, and the second washer, and the nut being threaded pre-tightened onto the bolt.
9. An electrical device, characterized in that, include: The wiring fixing device as described in any one of claims 1 to 8.
10. A method for connecting the low-voltage side of a transformer, characterized in that, Using the wiring fixing device as described in any one of claims 1 to 8 includes the following steps: Determine the installation position on the low-voltage side terminal block of the transformer, and initially fix the first fixing part; Place the ends of the three-phase low-voltage overhead conductors into the first fixing part of the corresponding phase, connect the other end of the second fixing part with the other end of the first fixing part, and set the limiting component on the second fixing part to achieve radial self-locking. The connecting component is installed by passing through one end of the first fixing part and one end of the second fixing part, and then the subsequent electrical connection is completed.