Anti-deformation ring main unit

Abstract

The utility model discloses a kind of anti-deformation ring main unit of technical field, including cabinet skeleton, the inside of cabinet skeleton is provided with sealed inner shell, first inner groove is formed between cabinet skeleton and sealed inner shell, the outside of cabinet skeleton is provided with several groups of second inner groove, the inside of the opening of cabinet skeleton is provided with third inner groove, the top of cabinet skeleton is also installed with cabinet door component, the ring main unit is used in cooperation between telescopic adjusting groove, anti-collision cabinet board, adjusting baffle and compression spring, can play the role of soft contact when ring main unit is handled or subjected to external impact, it can reduce the damage caused by the rigid contact of anti-collision cabinet board and external, simultaneously still can be elastically stored and reset to anti-collision cabinet board, by the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design of the structure design

Description

Technical Field

[0001] This utility model relates to the field of ring main unit technology, and in particular to a deformation-resistant ring main unit. Background Technology

[0002] A ring main unit (RMN) is a high-voltage switchgear used in urban power distribution networks, typically in 10kV or 35kV ring network power supply systems. Its main functions are power distribution, control, protection, and monitoring. A RMN generally consists of load switches, disconnect switches, grounding switches, fuses, and cable entry / exit ports, enabling a ring power supply structure with multiple cable connections. When a fault occurs on one line, the faulty section can be quickly disconnected, and power can continue from other lines, thus ensuring the continuity and reliability of the power grid operation.

[0003] Currently, most existing ring main units (RMUs) are designed with a single-layer shell. While these meet electrical safety and sealing requirements, the exterior of the cabinet is susceptible to structural stress from external impacts or handling during operation, which can easily lead to deformation of the outer shell. Furthermore, because RMUs lack pressure relief structures, when internal components generate high temperatures during operation, high pressure accumulates inside the sealed environment. This causes the single-layer metal enclosure to slightly expand and deform under the combined effects of thermal expansion stress and gas pressure stress. Therefore, existing RMUs still have certain limitations in their use.

[0004] Based on this, we propose a deformation-resistant ring main unit to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide a deformation-resistant ring main unit that can solve the problems of existing single-layer shell ring main units being easily deformed by external impacts or bumps during use, as well as slight expansion and deformation caused by high pressure generated by the sealed environment during high-temperature operation.

[0007] To solve the above technical problems, this utility model provides an anti-deformation ring main unit, which adopts the following technical solution: it includes a cabinet frame, a sealed inner shell is provided inside the cabinet frame, a first embedded groove is formed between the cabinet frame and the sealed inner shell, several sets of second embedded grooves are opened on the outer side of the cabinet frame, a third embedded groove is opened on the inner side of the opening of the cabinet frame, and a cabinet door assembly is also installed on the top of the cabinet frame.

[0008] The cabinet door assembly includes a pressure relief box, a pressure relief valve connected to the top of the pressure relief box, a cabinet door frame connected to one side of the bottom of the pressure relief box, a sealed cabinet door hinged inside the cabinet door frame, an inner cavity frame provided on the outside of the cabinet door frame, and a sealed outer shell provided at the bottom of the pressure relief box.

[0009] Optionally, the inner cavity frame and the third inner groove are in a transition fit, and the sealing outer shell and the first inner groove are in a plug-in fit.

[0010] Optionally, the sealed outer shell is provided with telescopic adjustment grooves on all four sides. The telescopic adjustment grooves are connected to anti-collision cabinet plates. An adjustment baffle is installed on one side of the anti-collision cabinet plates. The adjustment baffle matches the structure of the telescopic adjustment grooves. Multiple sets of compression springs are also connected between the adjustment baffle and the telescopic adjustment grooves.

[0011] Optionally, the anti-collision cabinet panel is matched with the second inner groove structure, and the anti-collision cabinet panel and the second inner groove are in a snap-fit ​​fit.

[0012] Optionally, a buffer cavity is provided in the middle of both the anti-collision cabinet panel and the sealed cabinet door, and a reinforcing rib is also provided inside the buffer cavity.

[0013] Optionally, the pressure relief valve includes a pressure relief cylinder, a valve port is installed at the top of the pressure relief cylinder, an annular valve plate is arranged around the middle of the pressure relief cylinder, a circular valve plate is connected to the middle of the annular valve plate, and a tension spring is connected between the circular valve plate and the bottom of the pressure relief cylinder.

[0014] Optionally, the circular valve plate and the annular valve plate are structurally matched, and the circular valve plate and the annular valve plate are in a transition fit.

[0015] Optionally, the bottom of the pressure relief cylinder has multiple sets of air inlets arranged at equal intervals along the periphery, and the air inlets are connected to the gas in the sealed inner shell through the pressure relief box.

[0016] In summary, this utility model has at least one of the following beneficial effects:

[0017] 1. In this utility model, by setting a telescopic adjustment groove inside the sealed outer shell, installing a collision protection cabinet plate and an adjustment baffle in the groove, and forming an elastic connection through a compression spring, the ring main unit is effectively protected against external impacts. The compression spring plays a soft contact role when the ring main unit is transported or subjected to external impacts, which can reduce the damage caused by the collision protection cabinet plate to hard contact with the outside. At the same time, it can also achieve elastic storage and reset of the collision protection cabinet plate. Through the snap-fit ​​design between the collision protection cabinet plate and the second inner groove, the collision protection cabinet plate can automatically return to its original position after the external force is applied, thereby ensuring the integrity of the collision protection structure and improving the stability of the connection between the sealed outer shell and the sealed inner shell.

[0018] 2. In this utility model, by using the pressure relief valve and the circular valve plate, the annular valve plate and the tension spring in combination, when the gas inside the sealed inner shell is under pressure due to high temperature expansion, the high temperature pressure can be automatically discharged through the valve port, and when the gas pressure decreases, the circular valve plate can be reset by the tension spring to restore the sealing state, thereby realizing the automatic adjustment and release of internal pressure, thus preventing the ring main unit from expanding and deforming under the superposition of thermal expansion stress and gas pressure stress, while maintaining the sealing of the inner shell and the safe operation of the internal components. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the cabinet frame structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the pressure relief box structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the sealed outer shell structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the pressure relief valve structure of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Cabinet frame; 2. Sealed inner shell; 3. First recessed groove; 4. Second recessed groove; 5. Third recessed groove; 6. Cabinet door assembly; 61. Pressure relief box; 62. Pressure relief valve; 621. Pressure relief cylinder; 622. Valve port; 623. Annular valve plate; 624. Circular valve plate; 625. Tension spring; 626. Air inlet; 63. Cabinet door frame; 64. Sealed cabinet door; 65. Inner cavity frame; 66. Sealed outer shell; 661. Telescopic adjustment groove; 662. Anti-collision cabinet plate; 6621. Buffer cavity; 6622. Reinforcing rib; 663. Adjustment baffle; 664. Compression spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: Refer to Figures 1 to 5 This utility model provides an embodiment of an anti-deformation ring main unit, including a cabinet frame 1, a sealed inner shell 2 inside the cabinet frame 1, a first embedded groove 3 between the cabinet frame 1 and the sealed inner shell 2, several sets of second embedded grooves 4 on the outer side of the cabinet frame 1, a third embedded groove 5 on the inner side of the opening of the cabinet frame 1, and a cabinet door assembly 6 installed on the top of the cabinet frame 1. The cabinet door assembly 6 includes a pressure relief box 61, a pressure relief valve 62 connected to the top of the pressure relief box 61, and a cabinet door frame 63 connected to one side of the bottom of the pressure relief box 61. The cabinet door frame 63 is internally hinged with... The sealed cabinet door 64 and the outer side of the cabinet door frame 63 are also provided with an inner cavity frame 65. The bottom of the pressure relief box 61 is also provided with a sealed outer shell 66. By adding a cabinet door assembly 6 to the top of the cabinet frame 1, and setting a pressure relief box 61, pressure relief valve 62, cabinet door frame 63, sealed cabinet door 64, inner cavity frame 65 and sealed outer shell 66 in the cabinet door assembly 6, the ring main unit can realize automatic pressure relief when the internal temperature or pressure is abnormal, while ensuring the sealing performance and safe operation of internal components. It realizes the dual protection function of the ring main unit during use, which can withstand external impact and prevent internal expansion and deformation.

[0028] The inner frame 65 and the third inner groove 5 are in a transition fit, while the sealed outer shell 66 and the first inner groove 3 are in a plug-in fit. This structural design, through the transition fit between the inner frame 65 and the third inner groove 5, and the plug-in fit between the sealed outer shell 66 and the first inner groove 3, allows the inner frame 65 to be flexibly positioned during installation or disassembly, ensuring ease of assembly and maintenance / replacement. It also ensures the stability and airtightness of the connection between the sealed outer shell 66 and the cabinet frame 1. The sealed outer shell 66 has telescopic adjustment grooves 661 on all four sides. Anti-collision cabinet plates 662 are connected inside the telescopic adjustment grooves 661. An adjustment baffle 663 is installed on one side of the anti-collision cabinet plate 662, and the adjustment baffle 663 is structurally matched with the telescopic adjustment groove 661. In addition, multiple sets of compression springs 664 are connected between the adjusting baffle 663 and the telescopic adjusting groove 661. The sealed outer shell 66, through the cooperation of the telescopic adjusting groove 661, the anti-collision cabinet plate 662, the adjusting baffle 663, and the compression springs 664, can reduce the damage caused by the anti-collision cabinet plate 662 to hard contact with the outside. At the same time, it can enable the anti-collision cabinet plate 662 to automatically retract and reset after impact. The anti-collision cabinet plate 662 is structurally matched with the second inner groove 4. The anti-collision cabinet plate 662 and the second inner groove 4 are in a snap-fit ​​fit. Through the snap-fit ​​fit structure between the anti-collision cabinet plate 662 and the second inner groove 4, the anti-collision cabinet plate 662 can be firmly positioned on the inner shell when the ring main unit is subjected to external impact or handling force, and automatically reset after the external force disappears.

[0029] Both the anti-collision cabinet plate 662 and the sealed cabinet door 64 have a buffer cavity 6621 in the middle. The buffer cavity 6621 also has a reinforcing rib 6622 inside. Through the cooperation of the buffer cavity 6621 and the reinforcing rib 6622, the anti-collision cabinet plate 662 and the sealed cabinet door 64 can enhance their rigidity and deformation resistance. This effectively prevents the anti-collision cabinet plate 662 and the sealed cabinet door 64 from undergoing inward deformation during ring main unit handling or external impact. The pressure relief valve 62 includes a pressure relief cylinder 621. A valve port 622 is installed at the top of the pressure relief cylinder 621. An annular valve plate 623 is arranged around the middle of the pressure relief cylinder 621, and a circular valve plate is connected to the middle of the annular valve plate 623. A tension spring 625 is connected between the circular valve plate 624 and the bottom of the pressure relief cylinder 621. The pressure relief valve 62, through the cooperative structure between the pressure relief cylinder 621, valve port 622, annular valve plate 623, circular valve plate 624 and tension spring 625, can allow the internal gas to be conducted through the pressure relief cylinder 621 to the valve port 622 when the internal gas pressure rises, and push the circular valve plate 624 to move along the tension spring 625, thereby opening the valve port 622 to realize the automatic release of overpressure gas. When the internal gas pressure returns to the safe range, the tension spring 625 drives the circular valve plate 624 to automatically reset under the action of elasticity and re-close the valve port 622, thereby realizing the dynamic adjustment and automatic reset control of the internal gas pressure of the ring main unit.

[0030] The circular valve plate 624 and the annular valve plate 623 are structurally matched, with a transition fit between them. Through this structural matching and transition fit design, a tight-fitting sealing interface can be formed between the two when the pressure relief valve 62 is closed, effectively preventing gas leakage inside the ring main unit in the non-pressure relief state. Simultaneously, during pressure relief, the transition fit allows the circular valve plate 624 to open smoothly under air pressure and undergo slight displacement along the valve port direction, avoiding jamming or damage to the sealing surface during opening and closing. This achieves a balance between the flexibility of the circular valve plate 624's opening and closing action and the reliability of its sealing. The bottom of the pressure relief cylinder 621 has an opening... Multiple sets of air inlets 626 are arranged at equal intervals along the periphery. The air inlets 626 are connected to the sealed inner shell 2 through the pressure relief box 61. By opening multiple sets of air inlets 626 at equal intervals along the periphery at the bottom of the pressure relief cylinder 621 and connecting the air inlets 626 to the sealed inner shell 2 through the pressure relief box 61, the internal gas can be evenly introduced into the pressure relief cylinder 621 through the air inlets 626 when the internal gas pressure of the ring main unit increases. This ensures that the gas pressure is evenly distributed in the bottom area of ​​the pressure relief valve 62. At the same time, the equally spaced arrangement of the structure can avoid the phenomenon of concentrated airflow impact caused by single-point air intake, thereby realizing the smooth introduction of pressure relief airflow and pressure dispersion transmission, ensuring that the pressure relief valve 62 can open quickly and stably in response to high-pressure gas.

[0031] Working Principle: The anti-deformation ring main unit designed in this scheme, through the transition fit between the inner frame 65 and the third inner groove 5, and the plug-in fit between the sealed outer shell 66 and the first inner groove 3, not only facilitates disassembly and maintenance, but also improves the airtightness between the sealed inner shell 2 and the sealed outer shell 66. The telescopic adjustment groove 661 set inside the sealed outer shell 66, and the anti-collision plate 662 and adjustment baffle 663 installed within the telescopic adjustment groove 661, are elastically connected by a compression spring 664. When the ring main unit is handled or subjected to external impact, the compression spring 664 provides soft contact, reducing damage caused by hard contact of the anti-collision plate 662. It also allows for elastic storage and reset of the anti-collision plate 662. The snap-fit ​​fit between the anti-collision plate 662 and the second inner groove 4 ensures that it can return to its original position after external force, thereby improving the stability of the connection between the sealed outer shell 66 and the sealed inner shell 2.

[0032] The anti-deformation ring main unit designed in this scheme can automatically adjust and release internal pressure when the gas inside the sealed inner shell 2 expands due to high temperature and the pressure exceeds the elastic force of the tension spring 625. The circular valve plate 624 can be pushed open from the middle of the annular valve plate 623, detaching from the annular valve plate 623 and forming a gap. The high-temperature gas can be discharged outward through the gap and the valve port 622, thus releasing the pressure. When the internal gas pressure is less than the elastic force of the tension spring 625, the tension spring 625 resets the circular valve plate 624 through its own elastic tension. The reset circular valve plate 624 can restore the sealing state with the annular valve plate 623. Through the cooperation of the above pressure relief structure, the ring main unit can automatically adjust and release internal pressure during high-temperature operation, which can prevent the ring main unit from expanding and deforming under the superposition of thermal expansion stress and gas pressure stress, while maintaining the sealing of the inner shell and the safe operation of the internal components.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A deformation-resistant ring main unit, comprising a cabinet frame (1), characterized in that: The cabinet frame (1) is provided with a sealed inner shell (2) inside. A first inner groove (3) is formed between the cabinet frame (1) and the sealed inner shell (2). Several sets of second inner grooves (4) are opened on the outside of the cabinet frame (1). A third inner groove (5) is opened on the inside of the opening of the cabinet frame (1). A cabinet door assembly (6) is also installed on the top of the cabinet frame (1). The cabinet door assembly (6) includes a pressure relief box (61), a pressure relief valve (62) is connected to the top of the pressure relief box (61), a cabinet door frame (63) is connected to one side of the bottom of the pressure relief box (61), a sealed cabinet door (64) is hinged inside the cabinet door frame (63), an inner cavity frame (65) is also provided on the outside of the cabinet door frame (63), and a sealed outer shell (66) is also provided at the bottom of the pressure relief box (61).

2. The anti-deformation ring main unit according to claim 1, characterized in that: The inner cavity frame (65) and the third inner groove (5) are in a transition fit, and the sealed outer shell (66) and the first inner groove (3) are in a plug fit.

3. The anti-deformation ring main unit according to claim 2, characterized in that: The sealed outer shell (66) has telescopic adjustment grooves (661) on all four sides. The telescopic adjustment grooves (661) are connected to the inside of the anti-collision cabinet plate (662). An adjustment baffle (663) is installed on one side of the anti-collision cabinet plate (662). The adjustment baffle (663) matches the structure of the telescopic adjustment groove (661). Multiple sets of compression springs (664) are also connected between the adjustment baffle (663) and the telescopic adjustment groove (661).

4. The anti-deformation ring main unit according to claim 3, characterized in that: The anti-collision cabinet plate (662) is structurally matched with the second inner groove (4), and the anti-collision cabinet plate (662) and the second inner groove (4) are in a snap-fit ​​fit.

5. The anti-deformation ring main unit according to claim 4, characterized in that: Both the anti-collision cabinet panel (662) and the sealed cabinet door (64) have a buffer cavity (6621) in the middle, and the buffer cavity (6621) is also provided with a reinforcing rib (6622).

6. The anti-deformation ring main unit according to claim 1, characterized in that: The pressure relief valve (62) includes a pressure relief cylinder (621), a valve port (622) is installed on the top of the pressure relief cylinder (621), an annular valve plate (623) is arranged around the middle of the pressure relief cylinder (621), a circular valve plate (624) is connected to the middle of the annular valve plate (623), and a tension spring (625) is connected between the circular valve plate (624) and the bottom of the pressure relief cylinder (621).

7. The anti-deformation ring main unit according to claim 6, characterized in that: The circular valve plate (624) and the annular valve plate (623) are structurally matched, and there is a transition fit between the circular valve plate (624) and the annular valve plate (623).

8. The anti-deformation ring main unit according to claim 7, characterized in that: The bottom of the pressure relief cylinder (621) has multiple sets of air inlets (626) arranged at equal intervals along the periphery. The air inlets (626) are in gas communication with the sealed inner shell (2) through the pressure relief box (61).

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