Safety door for quick cable insertion and ring main unit

Abstract

The utility model belongs to the technical field of electrical equipment, and particularly relates to a safety door for quick cable insertion and a ring main unit. The safety door comprises a door plate of an inverted-L-shaped structure, a plurality of cable channels are formed in the bottom end of the lower portion of the door plate, a fast-inserting cable is clamped in each cable channel, a plurality of guide studs are fixed to the two ends of the rear side of the lower portion of the door plate respectively, and limiting pressing plates are arranged in parallel in a clearance mode through the guide studs; a baffle is slidably connected between the inner side of the limiting pressing plate and the rear side of the lower portion of the door plate through a guide stud, and the baffle slidably blocks the rear side of the cable channel through the guide stud and the limiting pressing plate. According to the utility model, the access of the quick-plug cable can be realized without using the original cabinet door of the ring main unit, the problem of inconvenient operation is solved, the problem of safe operation of the ring main unit caused by the exposure of other electrical components is also solved, the quick-plug cable can be sealed in the ring main unit, and the aesthetic degree of the ring main unit can also be ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrical equipment, specifically relating to a safety door for quick-connect cables and a ring main unit. Background Technology

[0002] Electrical equipment is a general term for equipment such as generators, transformers, power lines, and circuit breakers in a power system. Among them, a ring main unit (RNB) is a set of high-voltage switchgear housed in a steel plate metal cabinet or assembled into a modular ring network power supply unit. Its core components use load switches and fuses, offering advantages such as simple structure, small size, low price, and the ability to improve power supply parameters, performance, and safety. However, in actual construction, RNBs need to be connected to a bypass system to expand their operational efficiency. Currently, to allow the bypass system's cables to connect to the RNB, a conversion cable is used. This connection method has poor connection performance and is easily loosened by external forces (pulling or vibration), thus affecting the normal operation of both the RNB and the bypass system.

[0003] Existing technologies address the poor connection performance of ring main units (RNBs) when connected to bypass systems. For example, patent application CN209642086U describes a RNB with a quick-plug interface. This solution uses quick-plug connectors within the cabinet to enable rapid cable connection, resolving the poor connection performance issue associated with conversion cable installation. However, existing quick-plug cables can only connect to the existing RNB door. Since the existing RNB door is relatively large, opening it is extremely inconvenient. Furthermore, the door cannot be closed after the quick-plug cable is connected, exposing other electrical components inside the RNB, compromising the safety of its operation. Therefore, a new technical solution is needed to address these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a safety door for quick-connect cables and a ring main unit, in order to solve the problems mentioned in the background art, such as the current quick-connect cables can only be connected to the quick-plug connectors using the original cabinet door of the ring main unit, which is extremely inconvenient to operate. Moreover, the cabinet door cannot be closed after the quick-connect cable is connected to the quick-plug connector, and other electrical components inside the ring main unit will be exposed when the cabinet door is opened, which cannot guarantee the safety of the ring main unit operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety door for quick-connect cables, comprising a door panel, the door panel being configured with an inverted L-shaped structure, the lower bottom end of the door panel having several cable channels, each cable channel having a quick-connect cable clamped inside, the lower rear side of the door panel having several guide studs fixed at each end, the guide studs being spaced out and parallel to limit plates, the inner side of the limit plates being slidably connected to the lower rear side of the door panel through the guide studs, the baffles being slidably sealed to the rear side of the cable channels through the guide studs and the limit plates.

[0006] Furthermore, the cable channel is configured as an inverted U-shaped structure, the width of the cable channel is greater than the diameter of the quick-connect cable, the height of the cable channel is lower than the height of the baffle, the upper end of the baffle is provided with a limiting groove, and the lower end of the baffle is bent to have a limiting block that is limited and set with the limiting pressure plate, and is sealed to the rear side of the cable channel through a waist-shaped hole and guide bolts.

[0007] Furthermore, each of the left and right ends of the baffle has a slotted hole that mates with a guide bolt. The baffle slides between the lower rear side of the door panel and the inner side of the limiting pressure plate through the slotted hole and the guide bolt. One side of the baffle slides tightly against the lower rear side of the door panel, and the other side of the baffle slides tightly against the inner side of the limiting pressure plate. A nut is fixedly connected to the outer side of the limiting pressure plate by a guide bolt. The nut is fixed to one end of the guide bolt, and the other end of the guide bolt passes from the outer side of the limiting pressure plate to the inner side of the limiting pressure plate, and at the same time passes through the slotted hole and extends to be fixed to the lower rear side of the door panel.

[0008] Furthermore, a handle is fixed to the top of one side of the upper part of the door panel, and a positioning groove is provided on the other side of the upper part of the door panel. A positioning pin is fixed to each side of the bottom of the positioning groove and the positioning pin is set perpendicular to the upper part of the door panel. A limiting plate is fixed to the top of the lower rear side of the door panel and is set to limit the position of the baffle. A locking plate is fixed to the bottom of the limiting plate and is set to lock the position of the limiting groove. The locking plate is suspended from the top of the lower rear side of the door panel through the limiting plate.

[0009] In addition to the above technical solutions, there is also a ring main unit with a safety door for the quick-connect cable, wherein the safety door is installed at the opening of the quick-connect compartment of the ring main unit.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This utility model adopts an inverted L-shaped safety door, which allows the quick-connect cable to be sealed inside the ring main unit after being connected to the quick-plug connector. This eliminates the need for the original cabinet door, effectively avoiding the inconvenience caused by the large size of the original cabinet door. It also effectively prevents other electrical components from being exposed, thus ensuring the safe operation of the ring main unit. The cable channel at the bottom of the door panel allows for easier and faster sealing of the quick-connect cable inside the ring main unit, effectively preventing safety issues caused by the inability to close the cabinet door after the quick-connect cable connection. This significantly improves the safety and stability of the connection between the ring main unit and the bypass system, enhances the connection effect of the quick-connect cable, and improves the aesthetics of the ring main unit. The guide studs and limiting plates slide to seal the back of the cable channel, ensuring the cable channel maintains its integrity and extending its service life.

[0012] 2. This utility model adopts an inverted U-shaped cable channel and a cable channel width greater than the diameter of the quick-connect cable. This allows the quick-connect cable to be quickly and smoothly clamped in the cable channel without affecting the connection with the quick-connect connector. This effectively improves the connection effect and efficiency of the quick-connect cable. As a result, the quick-connect cable can be sealed inside the ring main unit under the clamping of the cable channel. This effectively avoids the safety problem caused by the inability to close the cabinet door due to the access of the quick-connect cable, which would lead to the exposure of the connection point. This effectively improves the safety and stability of the connection between the ring main unit and the bypass system, and ensures the aesthetics of the ring main unit.

[0013] 3. This utility model adopts a combination of a waist-shaped hole and a guide bolt, which not only allows the baffle to slide upward under the cable channel clamp quick-connect cable, ensuring the safety and stability of the connection between the ring main unit and the bypass system, but also allows the baffle to slide downward under its own weight after the cable channel leaves the quick-connect cable, ensuring the service life of the cable channel.

[0014] 4. This utility model uses a limiting plate to suspend the locking plate at the lower rear top of the door panel, which allows the baffle to maintain its balance when sliding upwards, effectively improving the reliability and stability of the baffle's sliding. By setting a positioning pin at the bottom upper part of the door panel, the safety door can be installed more conveniently and quickly at the quick-connect compartment opening of the ring main unit, effectively improving the installation effect and efficiency of the safety door and ensuring the aesthetics of the ring main unit. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the ring main unit of this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the side cross-section structure;

[0017] Figure 3 for Figure 1 Schematic diagram of the front structure;

[0018] Figure 4 This is a schematic diagram of the cable channel of the safety door of this utility model in the closed state (taking three cable channels as an example).

[0019] Figure 5 for Figure 4 A schematic diagram of the front structure;

[0020] Figure 6 for Figure 4 A schematic diagram of the rear structure;

[0021] Figure 7 for Figure 4 A schematic diagram of the side structure;

[0022] Figure 8 This is a schematic diagram of the cable channel of the safety door of this utility model in the open state (taking three cable channels as an example).

[0023] Figure 9 for Figure 8 A schematic diagram of the front structure;

[0024] Figure 10 for Figure 8 A schematic diagram of the rear structure;

[0025] Figure 11 for Figure 8 A schematic diagram of the side structure.

[0026] The components include: 1. Ring main unit; 2. Quick-connect cable; 3. Door panel; 4. Cable channel; 5. Quick-connect connector; 6. Guide stud; 7. Limiting pressure plate; 8. Baffle; 9. Waist-shaped hole; 10. Nut; 11. Limiting groove; 12. Locking plate; 13. Limiting plate; 14. Handle; 15. Positioning groove; 16. Positioning pin; 17. Cable clamp; 18. Lock cylinder; 19. Quick-connect chamber; 20. Limiting block. Detailed Implementation

[0027] The following embodiments are used to further illustrate the content of this utility model, and do not limit the application of this utility model. Example 1:

[0028] Please see Figures 1-11A safety door for quick-connect cables includes an inverted L-shaped door panel 3 for sealing a quick-connect cable 2 inside a ring main unit 1. The bottom of the door panel 3 has several cable channels 4 for clamping and fixing the quick-connect cable 2. Each cable channel 4 has a quick-connect cable 2 clamped inside for connecting to a quick-connect connector 5. At each end of the lower rear side of the door panel 3, several guide studs 6 are fixed, perpendicular to the door panel 3, for supporting and guiding the sliding of a limiting pressure plate 7 and a baffle 8. Limiting pressure plates 7 are intermittently and parallelly arranged through the guide studs 6 to prevent the baffle 8 from sliding or tilting. A baffle 8 is slidably connected between the inner side of the limiting pressure plate 7 and the lower rear side of the door panel 3 via the guide studs 6 to ensure the service life of the cable channel 4. The baffle 8 is slidably sealed to the rear side of the cable channel 4 by the guide studs 6 and the limiting pressure plates 7.

[0029] Please see Figures 4-11 Each of the left and right ends of the baffle 8 is provided with a waist-shaped hole 9 for driving the baffle 8 to slide. The waist-shaped hole 9 is connected to the guide bolt 6 through the waist-shaped hole 9 and the guide bolt 6. The baffle 8 slides between the lower rear side of the door panel 3 and the inner side of the limiting pressure plate 7 through the waist-shaped hole 9 and the guide bolt 6.

[0030] One side of the baffle 8 slides tightly against the lower rear side of the door panel 3, and the other side of the baffle 8 slides tightly against the inner side of the limiting pressure plate 7. The outer side of the limiting pressure plate 7 is fixedly connected to the nut 10 by the guide bolt 6. The nut 10 is fixed to one end of the guide bolt 6, and the other end of the guide bolt 6 passes from the outer side of the limiting pressure plate 7 to the inner side of the limiting pressure plate 7 and passes through the waist-shaped hole 9 and extends to be fixed to the lower rear side of the door panel 3.

[0031] The lower end of the baffle 8 is bent with a limiting block 20 to limit the sliding range of the baffle 8 (the limiting block 20 can be set as a double-layer folded edge, which solves the problem of damage caused by the quick-connect cable 2 being stuck in the cable channel 4). The limiting block 2 is wedge-shaped and abuts against the groove of the limiting pressure plate 7. The lower end of the baffle 8 is also sealed to the rear side of the cable channel 4 through the waist-shaped hole 9 and the guide bolt 6. The cable channel 4 is set as an inverted U-shaped structure. The width of the cable channel 4 is greater than the diameter of the quick-connect cable 2 and its height is lower than the height of the baffle 8.

[0032] The upper end of the baffle 8 is provided with a limiting groove 11 for limiting the position. The bottom edge of the limiting groove 11 is locked with a locking plate 12 for locking the baffle 8 to slide upward. The lower rear top of the door panel 3 is fixed with a limiting plate 13 for limiting the sliding range of the baffle 8. The middle bottom of the limiting plate 13 is fixedly connected to the locking plate 12. The locking plate 12 is suspended from the lower rear top of the door panel 3 through the limiting plate 13.

[0033] A handle 14 is fixed at the top of one side of the upper part of the door panel 3 to facilitate the installation of the door panel 3. A positioning groove 15 for the installation and positioning of the door panel 3 is provided on the other side of the upper part of the door panel 3. A positioning pin 16 for fixing the position of the door panel 3 is fixed on each side of the bottom of the positioning groove 15, and the positioning pin 16 is set vertically relative to the upper part of the door panel 3.

[0034] The working principle and usage process of this utility model are as follows: Figures 1-11 As shown, after the safety door of the quick-connect cable is assembled, the operator installs the entire safety door onto the ring main unit 1. The purpose is to seal the quick-connect cable 2 inside the ring main unit 1 under the clamps of the cable channel 4, solving the safety problem caused by the exposed joint due to the inability to close the cabinet door when the quick-connect cable 2 is connected. This improves the connection effect and efficiency of the quick-connect cable 2, and also improves the safety and stability of the connection between the ring main unit 1 and the bypass system (the functions and structures of conventional equipment such as bypass systems are well known in the field, and the connection settings are also common knowledge, so they will not be explained here and are not shown in the attached drawings), thereby ensuring the aesthetics of the ring main unit 1.

[0035] When the ring main unit 1 does not need to be connected to the bypass system, the initial state of the safety door is that it is installed on the ring main unit 1 and the baffle 8 on the lower rear side of its door panel 3 is in the closed state. Therefore, when the ring main unit 1 needs to be connected to the bypass system, and since the safety door is fixed to the ring main unit by a lock cylinder, the operator first unlocks the safety door using the lock cylinder 18 on the ring main unit 1, then removes the entire safety door from the ring main unit 1 using the handle 14, and then connects the quick-connect cable 2 through the cable clamp 17 fixed to the ring main unit 1 and the quick-connect connector 5. After the connection is completed, the operator uses the handle 14 to align the bottom of the cable channel 4 with the quick-connect cable 2, and then applies a downward force. At this time, the baffle 8 will slide downwards towards the upper part of the door panel 3 using the slotted hole 9 and the guide bolt 6, until the upper limit groove 11 of the baffle 8 is locked inside the locking plate 12 and its lower limit block 20 is engaged and abuts against the groove of the limit pressure plate 7, so that the cable channel 4 is cleared for clamping the quick-connect cable 2 as the baffle 8 slides towards the upper part of the door panel 3 (e.g., Figures 4-7 As shown), thus clamping the quick-connect cable 2 onto the cable channel 4 (as shown). Figure 2 As shown), at the same time, the positioning groove 15 will be aligned with the lock cylinder 18 on the ring main unit 1 under the clamping of the quick-connect cable 2 by the cable channel 4, so that the positioning pin 16 is placed on both sides of the lock cylinder 18 and fixed on both sides of the lock cylinder 18 under the rotation of the lock cylinder 18, thereby locking the safety door, thus completing the docking of the ring main unit 1 with the bypass system.

[0036] After the ring main unit 1 finishes docking with the bypass system, the operator first rotates the lock cylinder 18 to release the fixing pin 16 from the lock cylinder 18, thus unlocking the safety door. Then, the operator lifts the entire safety door using the handle 14, causing the entire safety door to move away from the ring main unit 1. This allows the cable channel 4 to leave the quick-connect cable 2 as the safety door moves away. Simultaneously, the baffle 8 slides downwards towards the door panel 3 using the sliding action of the slotted hole 9 and guide bolt 6, as well as its own weight, until its bottom is level with the bottom of the door panel 3. This blocks the cable channel 4 as the baffle 8 slides downwards towards the door panel 3 (e.g., ...). Figures 8-11 (As shown), then the quick-connect cable 2 is removed from the quick-connect connector 5. Then the operator uses the handle 14 to install the safety door onto the ring main unit 1 and rotates the lock cylinder 18 to fix the positioning pin 16 onto the lock cylinder 18, thereby locking the safety door. Example 2:

[0037] Please see Figures 1-11 As another objective of this utility model, a ring main unit is provided, wherein the quick-connect chamber 19 of the ring main unit is provided with a safety door for quick-connect cables as described above. Therefore, the ring main unit can obtain any of the beneficial effects of the safety door for quick-connect cables described above, which will not be repeated here.

Claims

1. A safety door for quick-connect cables, comprising a door panel, characterized in that, The door panel is configured with an inverted L-shaped structure. Several cable channels are provided at the bottom of the door panel. Each cable channel is clamped with a quick-connect cable. Several guide studs are fixed at both ends of the lower rear side of the door panel, which are perpendicular to the door panel. Limiting plates are arranged in parallel with the guide studs through gaps. A baffle is slidably connected between the inner side of the limiting plate and the lower rear side of the door panel through the guide studs. The baffle is slidably sealed to the rear side of the cable channel by the guide studs and the limiting plate.

2. A safety door for quick-connect cables according to claim 1, characterized in that, The cable channel is configured with an inverted U-shape, the width of the cable channel is greater than the diameter of the quick-connect cable, and the height of the cable channel is less than the height of the baffle.

3. A safety door for quick-connect cables according to claim 2, characterized in that, The baffle has a waist-shaped hole at each of its left and right ends that mates with a guide bolt, and slides between the lower rear side of the door panel and the inner side of the limiting pressure plate through the waist-shaped hole and the guide bolt.

4. A safety door for quick-connect cables according to claim 3, characterized in that, The upper end of the baffle has a limiting groove, and the lower end of the baffle is bent to have a limiting block that is limited by the limiting pressure plate and is sealed to the rear side of the cable channel through a waist-shaped hole and guide bolts.

5. A safety door for quick-connect cables according to claim 3, characterized in that, One side of the baffle slides tightly against the lower rear side of the door panel, and the other side of the baffle slides tightly against the inner side of the limiting pressure plate.

6. A safety door for quick-connect cables according to claim 5, characterized in that, The outer side of the limiting pressure plate is fixedly connected to a nut by a guide bolt, and the nut is fixed to one end of the guide bolt.

7. A safety door for quick-connect cables according to claim 6, characterized in that, The other end of the guide bolt passes from the outside of the limiting pressure plate to the inside of the limiting pressure plate, and at the same time passes through the waist-shaped hole and extends to be fixed to the lower rear side of the door panel.

8. A safety door for quick-connect cables according to claim 7, characterized in that, A limiting plate that is positioned relative to the baffle is fixed at the top rear side of the lower part of the door panel. A locking plate that is locked in place with the limiting groove is fixed at the bottom middle part of the limiting plate. The locking plate is suspended from the top rear side of the lower part of the door panel by the limiting plate.

9. A safety door for quick-connect cables according to claim 8, characterized in that, A handle is fixed to the top of one side of the upper part of the door panel, and a positioning groove is provided on the other side of the upper part of the door panel. A positioning pin is fixed on each side of the bottom of the positioning groove, and the positioning pin is set perpendicular to the upper part of the door panel.

10. A ring main unit, characterized in that, The device includes a safety door for a quick-connect cable as described in any one of claims 1-9, wherein the safety door is installed at the opening of the quick-connect compartment of the ring main unit.

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