Voltage transformer

Abstract

The utility model belongs to the technical field of electrical equipment, and particularly relates to a voltage transformer which comprises a transformer body and further comprises an insulating column arranged at the top of the transformer body. The locking assembly comprises a locking plate arranged at the bottom of the insulating column, a plurality of locking arms arranged at the bottom of the locking plate, a locking clamping groove matched with the locking arms and formed in the top of the mutual inductor body, a pressing plate arranged at the top of the locking plate, and a limiting column arranged at the bottom of the pressing plate and capable of being inserted into the locking clamping groove; the limiting column and the locking clamping groove are matched to form a limiting cavity used for restraining the locking arm. Wherein the locking plate and the pressing plate are detachably connected with the mutual inductor body through fasteners. According to the utility model, the locking assembly comprising the locking plate, the locking arm, the locking clamping groove, the pressing plate and the limiting column is arranged and is matched with the fastener to realize the detachable connection of the insulating column and the transformer body, so that the stability of the detachable connection of the insulating column of the voltage transformer is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and specifically refers to a voltage transformer. Background Technology

[0002] Voltage transformers are important devices used in power systems to transform voltage. Their main function is to convert high voltage to low voltage proportionally to enable operations such as power metering, relay protection, and voltage monitoring, thereby ensuring the safe and stable operation of the power system. They are widely used in various stages of power generation, transmission, and distribution.

[0003] In existing technologies, the insulating columns of some voltage transformers are fixedly connected to the transformer body and cannot be disassembled. When the insulating column is damaged or internal components need to be repaired, the entire device must be replaced, increasing maintenance costs and workload. On the other hand, the few detachable insulating columns rely on a simple fixing method, often using bolts for direct tightening. This requires specific tools for installation and disassembly, and long-term use can lead to loosening due to vibration, affecting connection stability and equipment reliability. Therefore, there is an urgent need for a voltage transformer structure with easily detachable insulating columns and a stable and reliable fixing method. Utility Model Content

[0004] This utility model solves the problems mentioned in the background art by setting a locking assembly including a locking plate, locking arm, locking slot, pressure plate and limiting post, and using fasteners to achieve a detachable connection between the insulating post and the transformer body.

[0005] The purpose of this utility model is achieved as follows: a voltage transformer, including a transformer body, and further comprising:

[0006] An insulating post is provided on the top of the transformer body;

[0007] The locking assembly includes a locking plate disposed at the bottom of the insulating post, a plurality of locking arms disposed at the bottom of the locking plate, a locking slot that matches the locking arms and is disposed at the top of the transformer body, a pressure plate disposed at the top of the locking plate, and a limiting post disposed at the bottom of the pressure plate and insertable into the locking slot. The limiting post and the locking slot cooperate to form a limiting cavity for restraining the locking arms.

[0008] The locking plate and the pressure plate are detachably connected to the transformer body via fasteners.

[0009] The present invention is further configured such that the fastener is a fastening bolt, which is sequentially inserted through the pressure plate and the locking plate and threadedly connected to the top of the transformer body.

[0010] The present invention is further configured such that the locking slot forms an accommodating space that allows the locking arm to rotate therein.

[0011] The present invention is further configured such that the bottom end of the locking arm is provided with a side-protruding engaging portion, and the side wall of the locking groove is provided with a limiting step that matches the engaging portion.

[0012] The present invention is further configured such that the engaging part of the locking arm and the limiting step of the locking groove form a slidingly connected guide rail structure.

[0013] The present invention is further configured such that the top end of the limiting post protrudes from the top surface of the pressure plate, forming an operating part that is easy to install and disassemble.

[0014] The present invention is further configured such that the top of the current transformer body is provided with a receiving groove for accommodating the locking plate and the pressure plate, and the top surface of the pressure plate is flush with the surface of the current transformer body after installation.

[0015] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0016] 1. By setting a locking plate at the bottom of the insulating column and a locking slot at the top of the transformer body, and by matching the locking arm with the locking slot, the insulating column and the transformer body can be detachably connected, thus solving the problem of non-detachable insulating columns in some voltage transformers.

[0017] 2. By leveraging the synergistic effect of the locking arm, locking slot, limiting post, and pressure plate in the locking assembly, combined with fastener fixation, a multi-layered fixing structure is formed, solving the problem of a single fixing method for detachable insulating posts.

[0018] 3. By rotating the locking arm within the locking slot and constraining the locking arm through the limiting cavity formed by the limiting post and the locking slot, the connection stability is enhanced, solving the problem of loosening due to vibration in existing detachable structures. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is an exploded view of the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0022] The reference numerals in the figure are as follows: 1. Transformer body; 2. Insulating column; 3. Locking assembly; 30. Locking plate; 31. Locking arm; 32. Locking slot; 33. Pressure plate; 34. Limiting column; 4. Limiting cavity; 5. Fastener; 50. Fastening bolt; 6. Accommodating space; 7. Engaging part; 8. Limiting step; 9. Guide rail structure; 10. Operating part; 11. Receiving groove. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 :

[0024] Example 1:

[0025] This embodiment provides a voltage transformer, including a transformer body, and further comprising:

[0026] An insulating post is provided on the top of the transformer body;

[0027] The locking assembly includes a locking plate disposed at the bottom of the insulating post, a plurality of locking arms disposed at the bottom of the locking plate, a locking slot that matches the locking arms and is disposed at the top of the transformer body, a pressure plate disposed at the top of the locking plate, and a limiting post disposed at the bottom of the pressure plate and insertable into the locking slot. The limiting post and the locking slot cooperate to form a limiting cavity for restraining the locking arms.

[0028] The locking plate and the pressure plate are detachably connected to the transformer body via fasteners.

[0029] The transformer body is used to carry components such as insulating columns, iron cores and windings. It is mostly a rectangular or cylindrical shell structure, which can be fixed to the mounting surface by bolts, and the top is connected to the insulating column by a locking assembly.

[0030] The insulating column provides electrical insulation, isolates the transformer body from external high-voltage components to ensure operational safety, and supports external wiring components. It is constructed as a solid or hollow column, mostly cylindrical in shape, and can be detachably connected to the top of the transformer body via a locking assembly. External wiring terminals can be connected to the top of the insulating column.

[0031] The locking assembly is used to achieve a detachable connection between the insulating column and the transformer body. Through mechanical structure cooperation, the insulating column can be easily disassembled and stably fixed. Its structure is composed of a locking plate, locking arm, locking slot, pressure plate, and limit post.

[0032] The locking plate connects the insulating column and the locking arm, evenly transferring the load of the insulating column to multiple locking arms and serving as the mounting carrier for the locking arms. It is mostly a circular plate structure, integrally formed with the insulating column, and fixed to the locking arm by welding.

[0033] The locking arm and the locking slot cooperate to achieve mechanical connection. By inserting into the locking slot and cooperating with rotation and locking, a preliminary fixation is formed. It is generally a long strip-shaped straight rod structure, evenly distributed along the bottom edge of the locking plate and extending downward. When inserted into the locking slot, it can move within the locking slot.

[0034] The locking slot is used to accommodate and cooperate with the locking arm, providing a space for the locking arm and restricting its displacement through cooperation. Its structure is a groove opened on the top of the current transformer body with a cross section matching the locking arm. It is evenly distributed along the top edge of the current transformer body and corresponds one-to-one with the locking arm, and is integrally formed with the current transformer body.

[0035] The pressure plate is used to press the locking plate and provide an installation carrier for the limit post. The locking plate is pressed tightly against the body by the tension of the fasteners to enhance the connection stability. It has a flat plate structure with through holes for the fasteners to pass through. It is similar in shape to the locking plate, is placed horizontally on top of the locking plate and its lower surface is in contact with the locking plate. It is detachably connected to the locking plate and the transformer body by fasteners. The bottom can be fixedly connected to the limit post by welding.

[0036] The limiting cavity restricts the range of motion of the locking arm. Its function is to constrain the locking arm within a closed space to prevent displacement during operation. It is the gap space formed between the limiting post and the locking groove wall after the limiting post is inserted into the locking groove. Its shape matches the cross-sectional shape of the locking arm and is naturally formed by the insertion of the limiting post into the locking groove.

[0037] The fasteners are bolts, which are sequentially inserted through the pressure plate and the locking plate, and threaded onto the top of the transformer body. The purpose of this design is to achieve a stable connection between the pressure plate, the locking plate, and the transformer body using bolts. During connection, the bolts first pass through the through holes on the pressure plate, then through the corresponding through holes on the locking plate, and finally threaded into the threaded holes on the top of the transformer body. The axial pressure generated by tightening the bolts causes the pressure plate to tightly press against the locking plate, thereby firmly fixing the insulating column to the transformer body via the locking assembly, while also facilitating subsequent disassembly.

[0038] The locking slot forms an accommodating space that allows the locking arm to rotate within it. The purpose of this design is to provide movable space for the locking arm, enabling it to rotate after being inserted into the locking slot. This rotation allows the locking arm to engage with the inner wall or limiting step of the locking slot, achieving initial locking and fixation. Furthermore, when disassembly is required, rotating the locking arm in the opposite direction disengages it from the locked state, facilitating the separation of the insulating column from the transformer body.

[0039] The bottom end of the locking arm has a side-protruding engaging portion, and the side wall of the locking groove has a limiting step that matches the engaging portion. The purpose of this design is to enhance the connection stability between the locking arm and the locking groove through the cooperation of the engaging portion and the limiting step. The engaging portion is a block-shaped structure that protrudes sideways from the bottom end of the locking arm, and the limiting step is a step-shaped structure formed by the inward indentation of the side wall of the locking groove. The two shapes are compatible with each other. When the locking arm is inserted into the locking groove and rotated to a specific position, the engaging portion will engage with the limiting step, forming a mechanically limited connection that restricts the locking arm from axially disengaging from the groove, thereby improving the reliability of the connection between the insulating column and the transformer body.

[0040] The locking arm's engaging portion and the locking groove's limiting step form a sliding connection guide rail structure. The purpose of this design is to guide the engagement process between the engaging portion and the limiting step through the guide rail structure. The side of the engaging portion and the surface of the limiting step form a smooth sliding contact surface. When the locking arm rotates within the locking groove, the engaging portion can move smoothly along the guide rail trajectory of the limiting step, ensuring precise alignment and reducing frictional resistance. This avoids jamming during engagement and ensures consistent positioning after engagement, making the connection between the locking arm and the locking groove more stable.

[0041] The top of the limiting post protrudes from the top surface of the pressure plate, forming an operating part that facilitates assembly and disassembly. The purpose of this design is to facilitate the assembly and disassembly of the limiting post and pressure plate through the operating part. The operating part is a columnar or polygonal block structure with the top of the limiting post protruding from the top surface of the pressure plate; its construction is adapted to hand grip or tool operation. In terms of connection, the operating part is integrally formed with the limiting post. By gripping or rotating the operating part with the aid of a tool, the limiting post and pressure plate can be moved synchronously, facilitating the alignment of the limiting post with the locking slot for insertion or removal, thus simplifying the assembly and disassembly process.

[0042] The top of the current transformer body is provided with a receiving groove for accommodating the locking plate and the pressure plate. After installation, the top surface of the pressure plate is flush with the surface of the current transformer body. The purpose of the above design is to achieve concealed installation of the locking plate and the pressure plate through the receiving groove. The receiving groove is a recessed structure formed by the downward indentation of the top of the current transformer body. Its shape matches the contour of the locking plate and the pressure plate, and its depth is adapted to the sum of the thicknesses of the two. In terms of connection, the receiving groove is integrally formed with the current transformer body. After the locking plate and the pressure plate are placed in the groove, the top surface of the pressure plate is flush with the surface of the body. This avoids the risk of collision caused by protruding components, makes the overall structure more regular, and reduces the impact of external debris accumulation on the connection parts.

[0043] During installation, align the locking plate and locking arm at the bottom of the insulating column with the locking slot in the receiving groove at the top of the transformer body. Insert the locking arm into the slot. The locking part protruding to the side at the bottom of the locking arm engages with the limiting step on the side wall of the locking slot through a sliding guide rail structure. Rotate the locking arm until the locking part engages with the limiting step. Place the pressure plate on top of the locking plate, so that the limiting post at the bottom of the pressure plate is inserted into the locking slot. It engages with the slot to form a limiting cavity that constrains the locking arm. The top of the limiting post protrudes from the operating part on the top surface of the pressure plate for easy operation. Fastening bolts are passed through the pressure plate and the locking plate in sequence and threaded to the top of the transformer body, so that the top surface of the pressure plate is flush with the surface of the transformer body. When disassembly is required, loosen the fastening bolts, remove the pressure plate and limiting post through the operating part, and rotate the locking arm in the opposite direction to disengage the locking part from the limiting step, thus separating the insulating column from the transformer body.

[0044] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A voltage transformer, comprising a transformer body, characterized in that, Also includes: An insulating post is provided on the top of the transformer body; The locking assembly includes a locking plate disposed at the bottom of the insulating post, a plurality of locking arms disposed at the bottom of the locking plate, a locking slot that matches the locking arms and is disposed at the top of the transformer body, a pressure plate disposed at the top of the locking plate, and a limiting post disposed at the bottom of the pressure plate and insertable into the locking slot. The limiting post and the locking slot cooperate to form a limiting cavity for restraining the locking arms. The locking plate and the pressure plate are detachably connected to the transformer body via fasteners.

2. A voltage transformer according to claim 1, characterized in that, The fastener is a fastening bolt, which is sequentially inserted through the pressure plate and the locking plate, and threadedly connected to the top of the transformer body.

3. A voltage transformer according to claim 1, characterized in that, The locking slot forms an accommodating space that allows the locking arm to rotate therein.

4. A voltage transformer according to claim 1, characterized in that, The bottom end of the locking arm is provided with a side-protruding engagement part, and the side wall of the locking groove is provided with a limiting step that matches the engagement part.

5. A voltage transformer according to claim 4, characterized in that, The locking arm's engaging portion and the locking groove's limiting step form a slidingly connected guide rail structure.

6. A voltage transformer according to claim 1, characterized in that, The top of the limiting post protrudes from the top surface of the pressure plate, forming an operating part that is easy to install and disassemble.

7. A voltage transformer according to claim 1, characterized in that, The top of the current transformer body is provided with a receiving groove for accommodating the locking plate and the pressure plate. After the pressure plate is installed, its top surface is flush with the surface of the current transformer body.

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