A sealing structure of a ring main unit maintenance opening

Abstract

The utility model provides a kind of sealing structure of ring main unit maintenance opening, comprising: mounting frame, first sealing plate and second sealing plate;The mounting frame one end is fixedly connected to the outer wall surface of ring main unit and has with the installation cavity of the inner cavity of ring main unit communication, the installation cavity is equipped with to connect the ring plate of first sealing plate, the mounting frame end away from ring main unit is equipped with the plug-in frame, the plug-in frame has the plug-in slot for the second sealing plate plug-in, the upper surface of the mounting frame is equipped with to lock the locking mechanism of second sealing plate fixedly.The thus, by the double sealing of first sealing plate and second sealing plate pair, dust, water vapor and other sundries outside can be effectively prevented from entering the inner cavity of ring main unit through installation cavity, ensure the insulation performance and safety of electrical equipment.

Description

Technical Field

[0001] This utility model belongs to the field of ring main unit technology, and in particular relates to a sealing structure for the inspection port of a ring main unit. Background Technology

[0002] Ring main units (RMS) are crucial equipment in power distribution systems, widely used in urban power grids, industrial parks, and residential communities. RMS units typically offer advantages such as small size, minimal footprint, and ease of installation and maintenance. Internally, they contain circuit breakers, disconnect switches, busbars, and other components to distribute and control electrical energy. Because RMS units contain high-voltage electrical components, their operation demands high safety and reliability; therefore, stringent requirements are placed on the sealing performance of the enclosure during design.

[0003] In ring main unit structures, the access port serves as a crucial passageway, primarily used for equipment installation, routine maintenance, and troubleshooting. However, existing technologies often employ traditional mechanical covers or rubber sealing rings for the sealing of access ports. These are susceptible to leaks due to prolonged use, environmental temperature variations, and aging, allowing dust and moisture to enter the cabinet and negatively impacting the insulation performance of internal electrical equipment. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a sealing structure for the inspection port of a ring main unit, so as to solve the problem in the prior art where the inspection port is not sealed properly, causing dust and moisture to enter the cabinet and affecting the insulation performance of the internal electrical equipment.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A sealing structure for the maintenance port of a ring main unit includes: a mounting frame, a first sealing plate, and a second sealing plate;

[0007] One end of the mounting frame is fixed to the outer wall of the ring main unit and has a mounting cavity communicating with the inner cavity of the ring main unit. The mounting cavity is provided with a ring plate for connecting the first sealing plate. The end of the mounting frame away from the ring main unit is provided with a plug-in frame. The plug-in frame has a plug-in groove for the second sealing plate to be plugged in. The upper surface of the mounting frame is provided with a locking mechanism for locking and fixing the second sealing plate.

[0008] Furthermore, the ring plate is provided with a threaded post, and the first sealing plate is provided with a through hole for the threaded post to pass through.

[0009] Furthermore, the ring plate is provided with an annular boss, and the first sealing plate is provided with an annular groove corresponding to the annular boss. Both the annular boss and the annular groove are provided with rubber sealing gaskets.

[0010] Furthermore, the first sealing plate is provided with a first handle.

[0011] Furthermore, the locking mechanism includes a locking frame, a locking spring, a locking rod, a locking block, a locking plate, and a stop bar;

[0012] The locking frame is fixed to the upper surface of the mounting frame and has a receiving cavity for accommodating the locking spring and the locking plate. One end of the locking spring is fixed to the bottom surface of the receiving cavity, and the other end is fixed to the locking plate. The locking frame also has a through-hole communicating with the receiving cavity. The locking rod is fixed to the end of the locking plate away from the locking spring, and the locking rod extends out of the receiving cavity through the through-hole. The locking block is fixed to the end of the locking rod away from the locking plate. The second sealing plate has a first locking groove corresponding to the locking block. The insertion frame has a second locking groove corresponding to the locking block, and the second locking groove communicates with the insertion groove. The locking frame also has a guide groove communicating with the receiving cavity. The stop rod is fixed to the locking plate and extends out of the receiving cavity through the guide groove.

[0013] Furthermore, the locking mechanism also includes a pull plate, and the end of the stop bar opposite to the locking plate is fixed to the pull plate.

[0014] Furthermore, there are multiple storage cavities, each of which is equipped with a locking spring and a locking plate. Adjacent storage cavities are connected by a connecting slot, and adjacent locking plates are connected by a connecting guide rod, which is slidably connected to the connecting slot.

[0015] Furthermore, the second sealing plate is provided with a third locking groove corresponding to the locking block;

[0016] The second sealing plate has a sealed state and a maintenance state. When the second sealing plate is in the sealed state, the locking block extends into the first locking slot after passing through the second locking slot.

[0017] When the second sealing plate is in the maintenance state, the locking block extends into the third locking slot after passing through the second locking slot.

[0018] Furthermore, the second sealing plate is provided with a limiting plate and the upper surface of the limiting plate is provided with a second handle.

[0019] Through the above technical solution, the second sealing plate is set at the end of the mounting frame away from the ring main unit, and is used to directly seal the opening of the mounting cavity, forming the first barrier; the first sealing plate is installed inside the mounting cavity through the ring plate, forming the second barrier. The first sealing plate and the second sealing plate cooperate with each other to form a double-layer sealing structure, which significantly improves the overall sealing effect of the inspection port; specifically, one end of the mounting frame is fixed to the outer wall of the ring main unit and has a mounting cavity that communicates with the inner cavity of the ring main unit, wherein the mounting cavity is provided with a ring plate for installing the first sealing plate, and the end of the mounting frame away from the ring main unit is provided for installing the second sealing plate. The plug-in frame has a plug-in slot that provides a convenient and precise plug-in position for the second sealing plate. The locking mechanism on the upper surface of the mounting frame is used to lock and fix the second sealing plate inserted into the plug-in slot. The second sealing plate is used to seal the opening of the mounting cavity, which can resist external dust and mechanical impact, and reduce the aging rate of the first sealing plate located in the mounting cavity directly exposed to the external environment. The first sealing plate located in the mounting cavity acts as an airtight barrier and a watertight barrier, effectively preventing external dust, water vapor and other debris from entering the inner cavity of the ring main unit through the mounting cavity, and ensuring the insulation performance and safety of the electrical equipment. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 This is a schematic diagram of the sealing structure provided in an exemplary embodiment of this disclosure;

[0022] Figure 2 This is a schematic diagram of the sealing structure provided in an exemplary embodiment of this disclosure from another angle, wherein the outer wall surface of the ring main unit is not shown;

[0023] Figure 3 This is a schematic diagram of the structure of the first sealing plate installed on the ring plate according to an exemplary embodiment of this disclosure;

[0024] Figure 4 This is a schematic diagram of the structure of the ring plate provided in an exemplary embodiment of this disclosure;

[0025] Figure 5 This is a schematic diagram of the locking mechanism provided in an exemplary embodiment of this disclosure;

[0026] Figure 6 This is a schematic diagram of the structure of the mounting frame provided in an exemplary embodiment of this disclosure;

[0027] Figure 7 This is a cross-sectional structural schematic diagram of the locking mechanism provided in an exemplary embodiment of this disclosure;

[0028] Figure 8 This is a schematic diagram of the structure of the second sealing plate provided in an exemplary embodiment of this disclosure;

[0029] Figure 9 This is a schematic diagram of the structure of the first sealing plate provided in an exemplary embodiment of this disclosure.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Mounting frame; 101. Mounting cavity; 2. First sealing plate; 201. Through hole; 202. Annular groove; 203. First handle; 3. Second sealing plate; 301. First locking groove; 302. Third locking groove; 4. Ring plate; 401. Annular boss; 5. Insertion frame; 501. Insertion groove; 6. Locking mechanism; 601. Locking frame; 6011. Receiving cavity; 6012. Second locking groove; 6013. Guide groove; 6014. Connecting groove; 602. Locking spring; 603. Locking rod; 604. Locking block; 605. Locking plate; 606. Stop bar; 607. Pull plate; 608. Connecting guide rod; 7. Threaded post; 8. Limiting plate; 9. Second handle. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] In the specific embodiments provided in this disclosure, a sealing structure for the inspection port of a ring main unit is provided, with reference to... Figures 1 to 9 As shown, the sealing structure of the inspection port of the ring main unit includes: a mounting frame 1, a first sealing plate 2, and a second sealing plate 3. The mounting frame 1 is fixed to the outer wall of the ring main unit at one end and has a mounting cavity 101 that communicates with the inner cavity of the ring main unit. The mounting cavity 101 is provided with a ring plate 4 for connecting the first sealing plate 2. The end of the mounting frame 1 away from the ring main unit is provided with a plug-in frame 5. The plug-in frame 5 has a plug-in groove 501 for the second sealing plate 3 to be plugged in. The upper surface of the mounting frame 1 is provided with a locking mechanism 6 for locking and fixing the second sealing plate 3.

[0037] Through the above technical solution, the second sealing plate 3 is set at the end of the mounting frame 1 away from the ring main unit, and is used to directly seal the opening of the mounting cavity 101, forming the first barrier; the first sealing plate 2 is installed inside the mounting cavity 101 through the ring plate 4, forming the second barrier. The first sealing plate 2 and the second sealing plate 3 cooperate with each other to form a double-layer sealing structure, which significantly improves the overall sealing effect of the inspection port; specifically, one end of the mounting frame 1 is fixed to the outer wall of the ring main unit and has a mounting cavity 101 that communicates with the inner cavity of the ring main unit. The mounting cavity 101 is provided with a ring plate 4 for installing the first sealing plate 2, and the end of the mounting frame 1 away from the ring main unit is provided with an insert for installing the second sealing plate 3. The insertion slot 501 of the insertion frame 5 provides a convenient and precise insertion position for the second sealing plate 3. The locking mechanism 6 on the upper surface of the mounting frame 1 is used to lock and fix the second sealing plate 3 inserted into the insertion slot 501. The second sealing plate 3 is used to seal the opening of the mounting cavity 101, which can resist external dust and mechanical impact, and reduce the aging rate of the first sealing plate 2 located in the mounting cavity 101 directly exposed to the external environment. The first sealing plate 2 located in the mounting cavity 101 serves as an airtight barrier and a watertight barrier, effectively preventing external dust, water vapor and other debris from entering the inner cavity of the ring main unit through the mounting cavity 101, and ensuring the insulation performance and safety of the electrical equipment.

[0038] In some implementations, reference Figure 3 , Figure 4 and Figure 9 As shown, the ring plate 4 is provided with a threaded post 7, and the first sealing plate 2 is provided with a through hole 201 for the threaded post 7 to pass through. By having the threaded post 7 pass through the through hole 201 and cooperate with the nut, the first sealing plate 2 can be firmly fixed in the mounting cavity 101, thereby ensuring that the first sealing plate 2 will not shift or loosen during long-term use, and improving the stability and reliability of the seal.

[0039] In some implementations, reference Figure 4 and Figure 9 As shown, in order to improve the sealing effect of the first sealing plate 2, the ring plate 4 is provided with an annular boss 401, and the first sealing plate 2 is provided with an annular groove 202 corresponding to the annular boss 401. Both the annular boss 401 and the annular groove 202 are provided with rubber sealing gaskets. Specifically, when the first sealing plate 2 is installed on the ring plate 4, the boss and the groove can be accurately fitted together to form a stable limiting fit relationship, making the connection between the first sealing plate 2 and the ring plate tighter and preventing displacement due to force or vibration during operation. At the same time, the rubber sealing gasket is compressed during the fitting process of the annular boss 401 and the annular groove 202, which can effectively fill the gap between the two. The rubber sealing gasket not only improves the sealing performance of the first sealing plate 2, but also plays a role in shock absorption and buffering, reducing the impact of mechanical impact and temperature changes on the sealing performance.

[0040] In some implementations, reference Figure 3 As shown, the first sealing plate 2 is provided with a first handle 203, which allows personnel to easily disassemble or install the first sealing plate 2 into the mounting cavity 101.

[0041] In some implementations, reference Figure 5 and Figure 9 As shown, the locking mechanism 6 includes a locking frame 601, a locking spring 602, a locking rod 603, a locking block 604, a locking plate 605, and a stop rod 606. The locking frame 601 is fixed to the upper surface of the mounting frame 1 and has a receiving cavity 6011 for receiving the locking spring 602 and the locking plate 605. One end of the locking spring 602 is fixed to the bottom surface of the receiving cavity 6011, and the other end is fixed to the locking plate 605. By utilizing the elasticity of the spring, the locking plate 605 can always be in contact with the bottom surface of the storage cavity 6011. Furthermore, the locking frame 601 also has a through-hole that communicates with the storage cavity 6011. Through this through-hole, a locking rod 603 is fixedly connected to the end of the locking plate 605 away from the locking spring 602, and the locking rod 603 extends out of the storage cavity 6011 through the through-hole. A locking block 604 is fixedly connected to the end of the locking rod 603 away from the locking plate 605.

[0042] The second sealing plate 3 is provided with a first locking slot 301 corresponding to the locking block 604, and the plug frame 5 is provided with a second locking slot 6012 corresponding to the locking block 604. The second locking slot 6012 is connected to the plug groove 501. Under the elastic force of the locking spring 602, the locking block 604 can be inserted into the first locking slot 301 located in the plug groove 501 through the second locking slot 6012, thereby realizing the locking and fixing of the second sealing plate 3.

[0043] In addition, the locking frame 601 is also provided with a guide groove 6013 communicating with the storage cavity 6011. The stop rod 606 fixes the locking plate 605 and extends out of the storage cavity 6011 through the guide groove 6013. That is, the stop rod 606 is slidably connected to the guide groove 6013, thereby guiding the movement of the locking plate 605 and ensuring that the movement of the locking plate 605 in the storage cavity 6011 is smooth and stable.

[0044] In some implementations, reference Figure 5 and Figure 7 As shown, the locking mechanism 6 also includes a pull plate 607. The end of the stop rod 606 opposite to the locking plate 605 is fixed to the pull plate 607. The pull plate 607 allows the operator to easily move the locking plate 605 smoothly within the receiving cavity 6011 by pulling the pull plate 607, thereby locking and releasing the second sealing plate 3. The pull plate 607, connected to the stop rod 606, allows the operator to push the locking plate 605 along the guide groove 6013. Specifically, by pulling the pull plate 607, the operator can easily release the locking of the second sealing plate 3, disassemble or replace the second sealing plate 3, improving the convenience and efficiency of maintenance.

[0045] In some implementations, reference Figure 5 and Figure 7 As shown, there are multiple storage cavities 6011, each of which is equipped with a locking spring 602 and a locking plate 605. Adjacent storage cavities 6011 are connected by a connecting groove 6014, and adjacent locking plates 605 are connected by a connecting guide rod 608, which is slidably connected to the connecting groove 6014. The arrangement of multiple storage cavities 6011 enables the locking mechanism 6 to effectively control multiple locking plates 605 in one structure, thereby achieving a more uniform and distributed locking effect and enhancing the overall fixing stability of the second sealing plate 3.

[0046] Specifically, adjacent storage cavities 6011 are connected by a connecting groove 6014 and adjacent locking plates 605 are connected by a connecting guide rod 608, so that the locking plates 605 can work together in their respective storage cavities 6011. Under the elastic force of multiple locking springs 602, the second sealing plate 3 can always be in a stable locking state.

[0047] For example, refer to Figure 7 As shown, the locking frame 601 has two storage cavities 6011. Each of these two storage cavities 6011 is equipped with a locking spring 602 and a locking plate 605. The two locking plates 605 are connected to a locking block 604 by their respective locking rods 603. Based on this, with the help of the elastic force of the two locking springs 602, the locking block 604 can be more stably and firmly inserted into the first locking slot 301.

[0048] In some implementations, reference Figure 2 , Figure 6 and Figure 8 As shown, the second sealing plate 3 is provided with a third locking groove 302 corresponding to the locking block 604, wherein the third locking groove 302 and the first locking groove 301 are arranged opposite to each other along the length direction of the second sealing plate 3.

[0049] For example, the second sealing plate 3 has a sealed state and a maintenance state. When the second sealing plate 3 is in the sealed state, the locking block 604 extends into the first locking slot 301 after passing through the second locking slot 6012. When the second sealing plate 3 is in the maintenance state, the locking block 604 extends into the third locking slot 302 after passing through the second locking slot 6012.

[0050] When it is necessary to switch the second sealing plate 3 from the self-maintenance state to the sealed state, the operator can pull the pull plate 607, causing the locking plate 605 to gradually compress the locking spring 602. As the locking spring 602 is compressed, the locking block 604 will gradually disengage from the third locking slot 302. After it is completely disengaged, the second sealing plate 3 will fall. At this time, the falling process is the insertion process of the second sealing plate 3 into the insertion frame 5 through the insertion slot 501. After the insertion is completed, under the elastic force of the locking spring 602, the locking plate 605 drives the locking rod 603 and the locking block 604 to move synchronously, so that the locking block 604 can extend into the first locking slot 301 after passing through the second locking slot 6012. This completes the switch from the self-maintenance state to the sealed state.

[0051] In some implementations, reference Figure 8 As shown, the second sealing plate 3 is provided with a limiting plate 8 and a second handle 9 on the upper surface of the limiting plate 8. The limiting plate 8 helps to provide stable positioning support during the installation and disassembly of the second sealing plate 3, ensuring that the second sealing plate 3 will not shift or move when fixed, thus effectively improving the sealing effect. Furthermore, the second handle 9 allows the operator to pull the second sealing plate 3 more conveniently, especially when switching between maintenance and sealing states, providing a more flexible and safer operating method.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for the inspection port of a ring main unit, characterized in that, include: Mounting frame (1), first sealing plate (2), and second sealing plate (3); The mounting frame (1) is fixed to the outer wall of the ring main unit at one end and has a mounting cavity (101) communicating with the inner cavity of the ring main unit. The mounting cavity (101) is provided with a ring plate (4) for connecting the first sealing plate (2). The mounting frame (1) is provided with a plug-in frame (5) at the end away from the ring main unit. The plug-in frame (5) has a plug-in groove (501) for the second sealing plate (3) to be plugged in. The upper surface of the mounting frame (1) is provided with a locking mechanism (6) for locking and fixing the second sealing plate (3).

2. The sealing structure of the inspection port of a ring main unit according to claim 1, characterized in that: The ring plate (4) is provided with a threaded post (7), and the first sealing plate (2) is provided with a through hole (201) for the threaded post (7) to pass through.

3. The sealing structure of the inspection port of a ring main unit according to claim 1, characterized in that: The ring plate (4) is provided with an annular boss (401), and the first sealing plate (2) is provided with an annular groove (202) corresponding to the annular boss (401). Both the annular boss (401) and the annular groove (202) are provided with rubber sealing gaskets.

4. The sealing structure of the inspection port of a ring main unit according to claim 1, characterized in that: The first sealing plate (2) is provided with a first handle (203).

5. The sealing structure of the inspection port of a ring main unit according to claim 1, characterized in that: The locking mechanism (6) includes a locking frame (601), a locking spring (602), a locking rod (603), a locking block (604), a locking plate (605), and a stop bar (606); The locking frame (601) is fixed to the upper surface of the mounting frame (1) and has a receiving cavity (6011) for receiving the locking spring (602) and the locking plate (605). One end of the locking spring (602) is fixed to the bottom surface of the receiving cavity (6011), and the other end is fixed to the locking plate (605). The locking frame (601) also has an opening communicating with the receiving cavity (6011). The locking rod (603) is fixed to the end of the locking plate (605) away from the locking spring (602), and the locking rod (603) extends out of the receiving cavity (6011) through the opening. The locking block (604) is fixedly connected to one end of the locking plate (605). The second sealing plate (3) is provided with a first locking groove (301) corresponding to the locking block (604). The plug frame (5) is provided with a second locking groove (6012) corresponding to the locking block (604). The second locking groove (6012) is connected to the plug groove (501). The locking frame (601) is also provided with a guide groove (6013) connected to the receiving cavity (6011). The stop bar (606) is fixedly connected to the locking plate (605) and extends out of the receiving cavity (6011) through the guide groove (6013).

6. The sealing structure of the inspection port of a ring main unit according to claim 5, characterized in that: The locking mechanism (6) further includes a pull plate (607), and the end of the stop bar (606) opposite to the locking plate (605) is fixed to the pull plate (607).

7. The sealing structure of the inspection port of a ring main unit according to claim 5, characterized in that: There are multiple storage cavities (6011), and each storage cavity (6011) is provided with a locking spring (602) and a locking plate (605). Adjacent storage cavities (6011) are connected by a connecting groove (6014), and adjacent locking plates (605) are connected by a connecting guide rod (608), and the connecting guide rod (608) is slidably connected to the connecting groove (6014).

8. The sealing structure of the inspection port of a ring main unit according to claim 5, characterized in that: The second sealing plate (3) is provided with a third locking groove (302) corresponding to the locking block (604); The second sealing plate (3) has a sealing state and a maintenance state. When the second sealing plate (3) is in the sealing state, the locking block (604) extends into the first locking slot (301) after passing through the second locking slot (6012). When the second sealing plate (3) is in the maintenance state, the locking block (604) extends into the third locking slot (302) after passing through the second locking slot (6012).

9. The sealing structure of the inspection port of a ring main unit according to claim 1, characterized in that: The second sealing plate (3) is provided with a limiting plate (8) and the upper surface of the limiting plate (8) is provided with a second handle (9).

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