A ring main unit with easy installation and expandable structure

Abstract

The application relates to the technical field of power equipment, and provides a ring net cabinet with an easy-to-install and expandable structure, which comprises a cabinet body and a cabinet door; limit structures are arranged at the outer ends of the two sides of the cabinet body; locking structures are arranged at the middle positions of the two sides of the cabinet body; fixing structures are arranged at the top and the bottom of the outer side of the cabinet body; the limit structures comprise linkage shafts arranged at the two ends of one side of the cabinet body. The locking structure is arranged, so that when splicing is performed, the locking groove and the base of the cabinet body are only needed to be correspondingly pushed in, the convex block is clamped into the transverse position, and the splicing is completed; meanwhile, the clamping groove of the fixing structure is inserted into the connecting base, the clamping block is automatically clamped into the hole of the clamping groove under the action of the spring, vertical locking is synchronously completed, the whole process does not need bolt fastening and hole alignment operation, compared with the complicated operation of traditional bolt connection mode which needs two persons to cooperate and fasten a large number of bolts one by one, the splicing efficiency of the application is obviously improved, and the labor cost and the time cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a ring main unit with an easy-to-install and expandable structure. Background Technology

[0002] A ring main unit is an electrical device consisting of a set of power transmission and distribution equipment housed in a metal or non-metal insulated cabinet or assembled into a modular ring network power supply unit. Its core components use load switches and fuses. It has advantages such as simple structure, small size, low price, and the ability to improve power supply parameters and performance as well as power supply safety. It is widely used in distribution substations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories. Modular ring main units usually adopt a modular design, with each unit being an independent module that can be freely combined and assembled as needed, facilitating flexible expansion and maintenance. Traditional modular ring main units are typically assembled using bolts for splicing and fixing. The use of a large number of bolts makes the process cumbersome, resulting in low assembly efficiency. In addition, since modular ring main units are generally large in size, at least two people are usually required to work together when fixing them with bolts. One person moves the ring main unit while the other aligns the holes, and then two people are needed to tighten the bolts. The operation is very inconvenient. Furthermore, the large number of bolts makes maintenance time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of this invention is to provide a ring main unit with an easy-to-install and expandable structure to solve the problem of inconvenient assembly of existing ring main units.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a ring main unit with an easy-to-install and expandable structure, including a cabinet body and a cabinet door; the outer ends of both sides of the cabinet body are provided with limiting structures, the middle positions of both sides of the cabinet body are provided with locking structures, and the top and bottom of the outer side of the cabinet body are provided with fixing structures; the limiting structure includes a linkage shaft installed at both ends of one side of the cabinet body, and the upper and lower ends of the linkage shaft are provided with outer pressure blocks, the inner sides of the outer pressure blocks are provided with slide rails, the top of the linkage shaft is provided with a support platform, and the other side of the cabinet body at the bottom of the outer pressure blocks is provided with inner pressure blocks.

[0005] Preferably, the locking structure includes a base fixed to one side of the cabinet, and the bases are respectively located at the top, middle and bottom of the side wall of the cabinet. Each base has a locking tongue installed inside, and each locking tongue has a protrusion on one side.

[0006] Preferably, a lock groove is fixed on the other side of the cabinet at the bottom of the lock tongue, and a groove is provided on one side of the lock groove, and the protrusion and the groove form an engaging structure.

[0007] Preferably, the linkage shaft and the outer pressure block are symmetrically distributed about the vertical center line of the cabinet, the linkage shaft and the outer pressure block are threaded together, the bottom of the outer pressure block is angled, and the top of the inner pressure block is angled.

[0008] Preferably, a handle is installed at the top of the linkage shaft, and a ratchet is fixed at the top of the linkage shaft.

[0009] Preferably, a locking block is installed on the top of the support platform on one side of the ratchet, and the locking block and the ratchet form an engaging structure, and an elastic piece is provided on one side of the locking block.

[0010] Preferably, the fixing structure includes a connecting seat installed on one side of the cabinet, and the connecting seats are symmetrically distributed about the vertical center line of the cabinet. The other side wall of the cabinet corresponding to the connecting seat is equipped with a slot.

[0011] Preferably, each of the connecting seats has a pin installed inside, and each pin is fitted with a spring, forming a sliding structure between the pin and the connecting seat.

[0012] Preferably, each pin has a pull ring fixed to its outer end and a connecting piece provided at its inner end.

[0013] Preferably, each of the connecting pieces has a locking block at its front end, and one side of the locking block is angled, and the outer side of the locking groove is angled.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the easily installable and expandable ring main unit has a locking structure that enables the cabinet to quickly engage and position itself, and a fixing structure that automatically locks itself, improving splicing efficiency; the limiting structure corrects longitudinal offset and locks through pressure blocks, and works with ratchet anti-rotation to form a three-dimensional locking system, ensuring long-term reliability. 1. By incorporating a locking structure, during assembly, simply align the locking groove of one cabinet with the base of another and push it in. The locking tongue returns to its original position by gravity, causing the protrusion to engage with the groove, thus completing the lateral positioning. Simultaneously, the locking groove of the fixing structure is inserted into the connecting seat, and under the action of the spring, the locking block automatically engages with the hole in the locking groove, completing the vertical locking simultaneously. The entire process requires no bolt tightening or hole alignment, allowing a single person to complete the assembly of cabinets. Compared to the cumbersome operation of traditional bolt connection methods, which requires two people to tighten a large number of bolts one by one, the assembly efficiency of this invention is significantly improved, reducing labor and time costs. Furthermore, after the locking structure is assembled, when the cabinet is subjected to an outward pulling force, the wedge effect of the inclined surface makes the engagement between the protrusion and the groove tighter and tighter, achieving mechanical self-locking. This transforms the vibration and external force that may be generated during the operation of the ring main unit into locking force, effectively avoiding problems such as fastener loosening and busbar connection fault alarm caused by long-term vibration in traditional bolt connections, and ensuring the connection stability and power supply reliability of the ring main unit during long-term operation. 2. By setting a limiting structure, the beveled surfaces of the upper and lower pressure blocks contact each other to generate misalignment and compression. This process can automatically correct and align the longitudinal offset position between the two sets of cabinets, ensuring that the splicing surfaces are aligned and completing the longitudinal locking. This structure, together with the transverse locking of the locking structure and the vertical locking of the fixing structure, constitutes the three-dimensional locking system of the ring main unit, effectively eliminating the assembly gap between the splicing surfaces and ensuring the tight fit of the splicing surfaces of the two cabinets. Furthermore, a ratchet is fixed at the top of the linkage shaft to effectively prevent the linkage shaft from rotating due to vibration, thereby avoiding the outer pressure block from retracting and loosening. This anti-loosening design further enhances the durability and reliability of the ring main unit's three-dimensional locking, ensuring that the entire splicing structure maintains a stable connection throughout the ring main unit's entire life cycle. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the cabinet door in the unfolded state of the present invention; Figure 3 For the present invention Figure 2 A magnified view of the structure at point A in the middle; Figure 4 This is a frontal three-dimensional structural diagram of the outer pressure block of the present invention; Figure 5 This is a rear view three-dimensional structural diagram of the outer pressure block of the present invention; Figure 6 This is a three-dimensional structural diagram of the connector of the present invention; Figure 7 This is a three-dimensional structural diagram of the connector seat of the present invention in a cross-sectional state; Figure 8 This is a three-dimensional structural diagram of the card slot of the present invention; Figure 9 This is a three-dimensional structural diagram of the base of the present invention; Figure 10 This is a three-dimensional structural diagram of the base of the present invention in a cut-out state; Figure 11 This is a top-view three-dimensional structural diagram of the lock groove of the present invention; Figure 12 This is a three-dimensional structural diagram of the locking groove of the present invention, viewed from below.

[0016] The following are the annotations in the diagram: 1. Cabinet body; 2. Locking structure; 21. Base; 22. Lock tongue; 23. Lock groove; 24. Protrusion; 25. Groove; 3. Limiting structure; 31. Link shaft; 311. Handle; 312. Ratchet; 313. Locking block; 314. Elastic piece; 32. Outer pressure block; 33. Slide rail; 34. Inner pressure block; 35. Support platform; 4. Cabinet door; 5. Fixing structure; 51. Connecting seat; 52. Slot; 53. Pin; 531. Pull ring; 532. Connecting piece; 533. Locking block; 54. Spring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-12 The present invention provides an easily installable and expandable ring main unit, including a cabinet body 1 and a cabinet door 4; the outer ends of both sides of the cabinet body 1 are provided with limiting structures 3, the middle positions of both sides of the cabinet body 1 are provided with locking structures 2, and the top and bottom of the outer side of the cabinet body 1 are provided with fixing structures 5; the locking structure 2 includes a base 21 fixed to one side of the cabinet body 1, and the base 21 is located at the top, middle and bottom of the side wall of the cabinet body 1 respectively. The inside of the base 21 is provided with a locking tongue 22, and one side of the locking tongue 22 is provided with a protrusion 24. The other side of the cabinet body 1 at the bottom of the locking tongue 22 is fixed with a locking groove 23, and one side of the locking groove 23 is provided with a groove 25. The protrusion 24 and the groove 25 form an engaging structure. Reference Figure 2 and Figures 9-12 As shown, when the device is assembled, the locking groove 23 on the left side of one ring network cabinet is aligned with the base 21 on the right side of another ring network cabinet and inserted. The corresponding positions of the locking groove 23 and the locking tongue 22 are both at an angle. During the insertion of the locking groove 23, the locking tongue 22 is pushed upward, and then the locking groove 23 is pushed in. When the groove 25 reaches the inside of the protrusion 24, the locking tongue 22 returns to its original position under its own weight, so that when the protrusion 24 reaches the inside of the groove 25, when a pulling force is applied to the cabinet 1 to one side, due to the inclined design of the protrusion 24 and the groove 25, a self-locking effect is achieved as it is pulled tighter, so that the ring network cabinet is locked in the horizontal position and achieves the initial positioning effect. The fixed structure 5 includes a connecting seat 51 installed on one side of the cabinet 1, and the connecting seats 51 are symmetrically distributed about the vertical center line of the cabinet 1. The other side wall of the cabinet 1 corresponding to the connecting seat 51 is equipped with a slot 52. The connecting seat 51 is equipped with a pin 53 inside, and the pin 53 is fitted with a spring 54. The pin 53 and the connecting seat 51 form a sliding structure. The outer end of the pin 53 is fixed with a pull ring 531. The inner end of the pin 53 is provided with a connecting piece 532. The front end of the connecting piece 532 is provided with a locking block 533. One side of the locking block 533 is beveled, and the outer side of the slot 52 is beveled. Reference Figures 6-8 As shown, while the lock slot 23 is inserted, the slot 52 on the left side of cabinet 1 is simultaneously inserted into the connecting seat 51 on the right side of another cabinet 1. The slot 52 and the corresponding position of the block 533 are at an angle. When the block 533 is squeezed by the slot 52, the block 533 will slide and retract towards the side wall of the connecting seat 51, so that the slot 52 can be smoothly inserted into the interior of the connecting seat 51. When the slot 52 is inserted to the designated position, the block 533 loses its obstruction. Under the tension of the spring 54, the connecting piece 532 is pushed to drive the block 533 into the hole of the slot 52, thereby realizing the vertical locking of the ring main unit. When disassembly is required, the pull ring 531 is pulled to drive the block 533 out of the hole of the slot 52. The limiting structure 3 includes a linkage shaft 31 installed at both ends of one side of the cabinet 1. Both ends of the linkage shaft 31 are equipped with outer pressure blocks 32. The inner side of the outer pressure blocks 32 is equipped with a slide rail 33. The top of the linkage shaft 31 is equipped with a support platform 35. The bottom of the outer pressure blocks 32 is equipped with an inner pressure block 34 on the other side of the cabinet 1. The linkage shaft 31 and the outer pressure blocks 32 are symmetrically distributed about the vertical center line of the cabinet 1. The linkage shaft 31 and the outer pressure blocks 32 are threaded together. The bottom of the outer pressure blocks 32 is angled. The top of the inner pressure blocks 34 is angled. The top of the linkage shaft 31 is equipped with a handle 311. The top of the linkage shaft 31 is fixed with a ratchet 312. The top of the support platform 35 on one side of the ratchet 312 is equipped with a locking block 313. The locking block 313 and the ratchet 312 form an engaging structure. The side of the locking block 313 is equipped with a spring piece 314. Reference Figures 1-5As shown, when the horizontal and vertical fixing between the ring main units is completed, the rotating handle 311 drives the linkage shaft 31 to rotate. The outer pressure block 32 and the linkage shaft 31 are threaded together. When the linkage shaft 31 rotates, it drives the outer pressure block 32 to slide down along the slide rail 33. The corresponding positions of the outer pressure block 32 and the inner pressure block 34 are at an angle. When the outer pressure block 32 moves down, the angles come into contact and are misaligned and squeezed, which drives the longitudinal offset position between the two sets of cabinets to be corrected. When the outer pressure block 32 moves down to the position of overlapping with the inner pressure block 34, the longitudinal locking between the ring main units is completed. The top of the linkage shaft 31 is equipped with a ratchet 312. After locking, the linkage shaft 31 is prevented from rotating by the locking block 313 against the ratchet 312, ensuring the locking effect is firm. When disassembly is required, press the end of the locking block 313 to make the front end move away from the teeth of the ratchet 312, and then rotate the linkage shaft 31 in the opposite direction to make the outer pressure block 32 move away from the inner pressure block 34.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ring main unit with an easy-to-install and expandable structure, comprising a cabinet body (1) and a cabinet door (4); Its features are: Limiting structures (3) are provided at the outer ends of both sides of the cabinet (1), locking structures (2) are installed at the middle position of both sides of the cabinet (1), and fixing structures (5) are provided at the top and bottom of the outer side of the cabinet (1). The limiting structure (3) includes a linkage shaft (31) installed at both ends of one side of the cabinet (1), and an outer pressure block (32) is installed at both the upper and lower ends of the linkage shaft (31). A slide rail (33) is installed on the inner side of the outer pressure block (32). A support platform (35) is provided on the top of the linkage shaft (31). An inner pressure block (34) is provided on the other side of the cabinet (1) at the bottom of the outer pressure block (32).

2. The ring main unit with an easy-to-install and expandable structure according to claim 1, characterized in that: The locking structure (2) includes a base (21) fixed to one side of the cabinet (1), and the base (21) is located at the top, middle and bottom of the side wall of the cabinet (1). The base (21) is equipped with a locking tongue (22), and a protrusion (24) is provided on one side of the locking tongue (22).

3. The ring main unit with an easy-to-install and expandable structure according to claim 2, characterized in that: The other side of the cabinet (1) at the bottom of the latch (22) is fixed with a lock groove (23), and a groove (25) is provided on one side of the lock groove (23). The protrusion (24) and the groove (25) form a locking structure.

4. The ring main unit with an easy-to-install and expandable structure according to claim 1, characterized in that: The linkage shaft (31) and the outer pressure block (32) are symmetrically distributed about the vertical center line of the cabinet (1). The linkage shaft (31) and the outer pressure block (32) are threaded together. The bottom of the outer pressure block (32) is angled and the top of the inner pressure block (34) is angled.

5. A ring main unit with an easy-to-install and expandable structure according to claim 4, characterized in that: A handle (311) is installed at the top of the linkage shaft (31), and a ratchet (312) is fixed at the top of the linkage shaft (31).

6. A ring main unit with an easy-to-install and expandable structure according to claim 5, characterized in that: A locking block (313) is installed on the top of the support platform (35) on one side of the ratchet (312), and the locking block (313) and the ratchet (312) form an engaging structure. An elastic piece (314) is provided on one side of the locking block (313).

7. The ring main unit with an easy-to-install and expandable structure according to claim 1, characterized in that: The fixed structure (5) includes a connecting seat (51) installed on one side of the cabinet (1), and the connecting seats (51) are symmetrically distributed about the vertical center line of the cabinet (1). The other side wall of the cabinet (1) corresponding to the connecting seat (51) is equipped with a slot (52).

8. A ring main unit with an easy-to-install and expandable structure according to claim 7, characterized in that: Each of the connecting seats (51) has a pin (53) installed inside, and each of the pins (53) is fitted with a spring (54). The pins (53) and the connecting seats (51) form a sliding structure.

9. A ring main unit with an easy-to-install and expandable structure according to claim 8, characterized in that: Each of the pins (53) has a pull ring (531) fixed to its outer end, and a connecting piece (532) is provided at the inner end of each pin (53).

10. A ring main unit with an easy-to-install and expandable structure according to claim 9, characterized in that: Each of the connecting pieces (532) has a locking block (533) at its front end, and one side of the locking block (533) is angled, and the outer side of the slot (52) is angled.

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