Ring main unit

Abstract

The utility model provides a ring main unit, which relates to the field of power switch equipment and particularly comprises a cabinet body and an interlocking device. When the three conditions that the test door is closed, the cable door is closed and the cable door moves along the first direction are met, the second sliding assembly extends into the operating mechanism chamber and partially moves along the direction opposite to the first direction and avoids the first sliding assembly. The part, extending into the test chamber, of the first sliding assembly is unlocked by an unlocking piece arranged on the test door, so that the first sliding assembly can move in the second direction, and the operation hole is exposed. That is to say, on the basis of the arrangement that the operation shaft needs to be exposed when the test door and the cable door are both closed, the ring main unit provided by the utility model not only realizes interlocking between the test chamber and the cable chamber, but also meets the safety requirement of five-prevention connection.

Description

Technical Field

[0001] The utility model relates to the field of power switch equipment, in particular to a ring network cabinet. Background Art

[0002] In the application scenario of high-voltage cabinets, the five-protection interlock is an essential requirement for product safety. It is extremely important to design a reasonable, economical, easy-to-install and produce mechanical interlock. Currently, most interlocks on the market are a set of mechanisms controlling an operating room. For example, a set of mechanisms controls the five-protection safety of the cable room, that is, to prevent the lower door of the cable room from being opened while energized.

[0003] Among the products of inflatable ring main unit, there is a new type of ring main unit. In addition to the cable room, it is also designed with a test room for testing the on-off status of the cables and the entire circuit of the product. Generally, two sets of safety interlocks are designed to meet the use requirements to prevent live electricity from accidentally entering the test room and cable room.

[0004] However, the two sets of safety interlocks cannot achieve the interlocking between the test room and the cable room. Utility Model Content

[0005] The utility model aims to provide a ring network cabinet, which can not only realize the interlocking between the test room and the cable room, but also meet the safety requirements of five-protection connection.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides a ring main unit, comprising a cabinet body and an interlocking device;

[0008] The cabinet includes an operating mechanism room arranged along a first direction, a test room equipped with a test door, and a cable room equipped with a cable door, and an operating shaft for controlling the grounding switch is arranged in the operating mechanism room;

[0009] The interlocking device includes a first sliding assembly, a second sliding assembly, an unlocking member, a locking member and a locking member, wherein the first sliding assembly is slidably connected to a connecting wall disposed between the operating mechanism chamber and the test chamber, and the first sliding assembly partially extends into the test chamber, the locking member is slidably connected to the connecting wall, the unlocking member extends along a third direction, and the unlocking member is connected to the test door; the second sliding assembly is disposed in the cable chamber, and the second sliding assembly partially extends into the operating mechanism chamber in the opposite direction of the first direction, and the locking member is connected to the cable door;

[0010] When the test door is closed, the cable door is closed and the cable door moves along the first direction, the unlocking member can act on the locking member to unlock the part of the first sliding assembly extending into the test chamber, and the locking member can lock the second sliding assembly to enable the part of the second sliding assembly extending into the operating mechanism chamber to move in the opposite direction of the first direction to avoid the first sliding assembly, thereby enabling the first sliding assembly to move along the second direction to expose the operating shaft;

[0011] Furthermore, there is an angle between the first direction and the second direction, there is an angle between the third direction and the first direction, and there is an angle between the third direction and the second direction.

[0012] In an optional embodiment, the locking member includes a mounting plate and a hanging rod, one side of the mounting plate is connected to the cable door, and the other side is connected to the hanging rod, and the hanging rod is used to lock the second sliding assembly.

[0013] In an optional embodiment, the second sliding assembly includes a first connecting rod, a second connecting rod and a third connecting rod connected in sequence, and the first connecting rod has an end away from the second connecting rod and a slot that cooperates with the hanging rod, and the third connecting rod extends into the operating mechanism chamber in the opposite direction of the first direction.

[0014] In an optional embodiment, the second sliding assembly further includes a blocking member, which is connected to the third connecting rod and is located in the operating mechanism chamber.

[0015] In an optional embodiment, the first sliding assembly includes a fixing plate and a first fixing pin, the fixing plate is provided with a first sliding groove extending along the second direction, and the first fixing pin sets the fixing plate on the connecting wall through the first sliding groove.

[0016] In an optional embodiment, the fixing plate includes a first folded edge portion extending in the opposite direction of the first direction, and the first folded edge portion can cover or expose the operating shaft.

[0017] In an optional embodiment, the fixed plate further includes a second folded edge portion extending in the opposite direction of the first direction, and the second folded edge portion and the first folded edge portion are spaced apart along the second direction, and the first sliding assembly further includes a pressure rod, which is arranged on the second folded edge portion.

[0018] In an optional embodiment, the operating mechanism chamber also includes a baffle, and the baffle, the fixed plate and the operating shaft are arranged in sequence along the third direction. The baffle is provided with an operating hole corresponding to the operating shaft and a second slide groove extending along the second direction. The first sliding assembly also includes a sliding rod, one end of the sliding rod cooperates with the second slide groove, and the other end is connected to the first folded edge portion.

[0019] In an optional embodiment, the first sliding assembly further includes a push rod, the connecting wall is provided with a third slide groove cooperating with the push rod, and the third slide groove extends along the second direction, one end of the push rod is connected to the fixing plate, and the other end passes through the third slide groove and extends into the test chamber, and the unlocking member is provided with a fourth slide groove extending along the second direction;

[0020] When the test door is opened, the locking member can lock the push rod; when the test door is closed, the unlocking member can resist the locking member to move along the third direction and make the push rod cooperate with the fourth sliding groove.

[0021] In an optional embodiment, a reset member and a second fixing pin are also provided in the test chamber, the locking member is provided with a fifth sliding groove, and the second fixing pin sets the locking member on the connecting wall through the fifth sliding groove, and one end of the reset member is connected to the locking member, and the other end is connected to the second fixing pin.

[0022] The beneficial effects of the embodiments of the utility model include:

[0023] The utility model provides a ring network cabinet, which includes a cabinet body and an interlocking device. Among them, when the three conditions of the test door closing, the cable door closing and the cable door moving along the first direction are all met, the second sliding component extends to the part of the operating mechanism room and moves in the opposite direction of the first direction and avoids the first sliding component, and the part of the first sliding component extending to the test room is unlocked by the unlocking member arranged on the test door, so that the first sliding component can move along the second direction to expose the operating hole. That is to say, the test room and the cable room are interlocked with the operating mechanism room through the unlocking member and the locking member arranged on their respective doors. In addition, it can also be understood that based on the above-mentioned record that the ring network cabinet needs to expose the operating shaft when the test door and the cable door are both closed, the ring network cabinet provided by the present application not only realizes the interlocking between the test room and the cable room, but also meets the safety requirements of the five-protection connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the overall structure of a ring main unit provided by an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the structure of the interlocking device provided in the embodiment of the utility model;

[0027] Figure 3The second sliding assembly and the locking member provided in the embodiment of the utility model;

[0028] Figure 4 A first sliding assembly provided by an embodiment of the utility model;

[0029] Figure 5 The locking member and unlocking member provided by the embodiment of the utility model;

[0030] Figure 6 This is a schematic diagram of the interlocking device and baffle structure provided in an embodiment of the utility model.

[0031] Icons: 10-ring main unit; 20-cabinet; 30-interlocking device; 100-operating mechanism room; 110-operating shaft; 130-baffle; 131-operating hole; 133-second slide; 200-test room; 210-test door; 300-cable room; 310-cable door; 400-first sliding assembly; 410-fixed plate; 420-first slide; 430-first folding part; 440-second folding part; 450-pressure rod; 460-slide rod; 4 70-push rod; 500-second sliding assembly; 510-first connecting rod; 511-slot; 520-second connecting rod; 530-third connecting rod; 540-blocking member; 600-unlocking member; 610-fourth slide groove; 700-locking member; 710-resetting member; 730-second fixing pin; 750-fifth slide groove; 800-locking member; 810-mounting plate; 830-hanging rod; 910-first direction; 930-second direction; 950-third direction. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Figure 1 The overall structural diagram of the ring main unit 10 provided in the embodiment of the utility model is as follows: Figure 2 This is a schematic diagram of the structure of the interlocking device 30 provided in the embodiment of the utility model. Figure 1 and Figure 2 The utility model provides a ring main unit 10 , which includes a cabinet body 20 and an interlocking device 30 .

[0039] The cabinet 20 includes an operating mechanism chamber 100 arranged along a first direction 910, a test chamber 200 equipped with a test door 210, and a cable chamber 300 equipped with a cable door 310, and an operating shaft 110 for controlling the grounding switch is arranged in the operating mechanism chamber 100;

[0040] The interlocking device 30 includes a first sliding assembly 400, a second sliding assembly 500, an unlocking member 600, a locking member 700 and a locking member 800. The first sliding assembly 400 is slidably connected to a connecting wall disposed between the operating mechanism chamber 100 and the test chamber 200, and the first sliding assembly 400 partially extends into the test chamber 200. The locking member 700 is slidably connected to the connecting wall. The unlocking member 600 extends along a third direction 950, and the unlocking member 600 is connected to the test door 210. The second sliding assembly 500 is disposed in the cable chamber 300, and the second sliding assembly 500 partially extends into the operating mechanism chamber 100 in the opposite direction of the first direction 910, and the locking member 800 is connected to the cable door 310.

[0041] When the test door 210 is closed, the cable door 310 is closed and the cable door 310 moves along the first direction 910, the unlocking member 600 can act on the locking member 700 to unlock the first sliding component 400 extending into the test chamber 200, and the locking member 800 can lock the second sliding component 500, so that the second sliding component 500 extends to the part of the operating mechanism chamber 100 and moves in the opposite direction of the first direction 910 to avoid the first sliding component 400, so that the first sliding component 400 can move along the second direction 930 to expose the operating shaft 110; and, there is an angle between the first direction 910 and the second direction 930, there is an angle between the third direction 950 and the first direction 910, and there is an angle between the third direction 950 and the second direction 930.

[0042] Based on the above arrangement, when the test door 210 is closed and the cable door 310 is opened, the first sliding assembly 400 is partially unlocked by extending into the test chamber 200. However, the movement of the first sliding assembly 400 in the second direction 930 is resisted by the partial resistance of the second sliding assembly 500 extending into the operating mechanism chamber 100. The first sliding assembly 400 cannot move along the second direction 930, so that the operating shaft 110 cannot be exposed.

[0043] When the cable door 310 is closed and moves along the first direction 910 and the test door 210 is opened, the second sliding assembly 500 avoids, however, the first sliding assembly 400 extending into the test chamber 200 is locked by the locking member 700, and the first sliding assembly 400 still cannot move along the second direction 930, and the operating shaft 110 still cannot be exposed.

[0044] Therefore, when the three conditions of the test door 210 being closed, the cable door 310 being closed, and the cable door 310 moving along the first direction 910 are all met, the second sliding assembly 500 extending to the part inside the operating mechanism chamber 100 moves in the opposite direction of the first direction 910 and avoids the first sliding assembly 400, and the part of the first sliding assembly 400 extending to the test chamber 200 is unlocked by the unlocking member 600 provided on the test door 210, so that the first sliding assembly 400 can move along the second direction 930 to expose the operating hole 131.

[0045] It can be understood that the test chamber 200 and the cable chamber 300 are interlocked with the operating mechanism chamber 100 through the unlocking member 600 and the locking member 800 respectively provided on their respective doors. In addition, it can also be understood that based on the above-mentioned record that the ring main unit 10 needs to expose the operating shaft 110 when both the test door 210 and the cable door 310 are closed, the ring main unit 10 provided in the present application not only realizes the interlocking between the test chamber 200 and the cable chamber 300, but also meets the safety requirements of the five-protection connection. In addition, the ring main unit 10 provided in the present application also has the technical advantages of simple structure, few parts, easy installation and high production efficiency.

[0046] See also Figure 3 In order to facilitate the locking and unlocking of the locking member 800 and the second sliding assembly 500, the locking member 800 includes a mounting plate 810 and a hanging rod 830. One side of the mounting plate 810 is connected to the cable door 310, and the other side is connected to the hanging rod 830, and the hanging rod 830 is used to lock the second sliding assembly 500. Specifically, the second sliding assembly 500 may have a hole, a groove or a hook to achieve the cooperation with the locking member 800, so as to achieve the unlocking and locking between the two.

[0047] Further, the second sliding assembly 500 includes a first link 510, a second link 520, and a third link 530 connected in sequence, and a notch 511 cooperating with the hanging rod 830 is provided at one end of the first link 510 away from the second link 520, and the third link 530 extends into the operating mechanism chamber 100 in the opposite direction of the first direction 910. It can be understood that the first link 510, the second link 520, and the third link 530 connected in sequence form a link structure to transmit the driving external force received by the first link 510 to the third link 530.

[0048] In some embodiments, in order to avoid interference or friction between the connecting rod structure and other structures in the ring main unit 10 during the transmission process, the first connecting rod 510 is hinged with the second connecting rod 520, and the second connecting rod 520 is fixedly connected with the third connecting rod 530, so that the first connecting rod 510 moves along the first direction 910 while the third connecting rod 530 moves in the opposite direction of the first direction 910. In other embodiments, the first connecting rod 510, the second connecting rod 520, and the third connecting rod 530 connected in sequence are all fixedly connected or integrally formed, and the lever-like principle is used to make the first connecting rod 510 move along the first direction 910 while the third connecting rod 530 moves in the opposite direction of the first direction 910.

[0049] Please refer again Figure 2 and Figure 3 In order to increase the limiting effect of the second sliding assembly 500 on the first blocking member 540, the second sliding assembly 500 further includes a blocking member 540, which is connected to the third connecting rod 530 and is located in the operating mechanism chamber 100. Based on this, when the blocking member 540 and the first sliding assembly 400 are both in the same plane, the movement of the first sliding assembly 400 in the second direction 930 is limited by the blocking member 540.

[0050] See also Figure 4 In order to facilitate the first sliding assembly 400 to move along the second direction 930, as an optional embodiment, the first sliding assembly 400 includes a fixing plate 410 and a first fixing pin, the fixing plate 410 is provided with a first slide groove 420 extending along the second direction 930, and the first fixing pin sets the fixing plate 410 on the connecting wall through the first slide groove 420. Based on the above configuration, it is explained that the first slide groove 420 can move relative to the first fixing pin along the second direction 930 or in the reverse direction of the second direction 930 without interfering with the connecting wall or other structures.

[0051] Please refer again Figure 4 and Figure 5 The first sliding assembly 400 further includes a push rod 470, a third slide groove cooperating with the push rod 470 is provided on the connecting wall, and the third slide groove extends along the second direction 930, one end of the push rod 470 is connected to the fixing plate 410, and the other end passes through the third slide groove and extends into the test chamber 200, and the unlocking member 600 is provided with a fourth slide groove 610 extending along the second direction 930;

[0052] When the test door 210 is opened, the locking member 700 can lock the push rod 470 ; when the test door 210 is closed, the unlocking member 600 can push the locking member 700 to move along the third direction 950 and make the push rod 470 cooperate with the fourth slide groove 610 .

[0053] Based on the above arrangement, it can be understood that since the fourth slide groove 610 extends along the second direction 930, when the push rod 470 is engaged into the fourth slide groove 610, the push rod 470 can move along the second direction 930 or in the opposite direction of the second direction 930, consistent with the movement direction of the fixed plate 410, that is, the first sliding component is released from the unlocked state as a whole.

[0054] In order to facilitate the reset of the locking member 700, a reset member 710 and a second fixing pin 730 are further provided in the test chamber 200. The locking member 700 is provided with a fifth slide slot 750, and the second fixing pin 730 sets the locking member 700 on the connecting wall through the fifth slide slot 750, and one end of the reset member 710 is connected to the locking member 700, and the other end is connected to the second fixing pin 730. Based on this, when the test door 210 is opened, the locking member 700 is reset to the position of the locking push rod 470, thereby locking the first sliding assembly 400 to prevent it from moving to expose the operating shaft 110, thereby protecting the staff.

[0055] Please refer again Figure 2 and 4 As an optional embodiment, in order to cover or expose the operating shaft 110, the fixing plate 410 includes a first folding portion 430 extending in the opposite direction of the first direction 910, and the first folding portion 430 can cover or expose the operating shaft 110. It can be understood that the first folding portion 430 can move with the fixing plate 410.

[0056] like Figure 4 As shown, the fixed plate 410 also includes a second folding portion 440 extending in the opposite direction of the first direction 910, and the second folding portion 440 and the first folding portion 430 are spaced apart along the second direction 930. The first sliding assembly 400 also includes a pressure rod 450, which is arranged on the second folding portion 440.

[0057] It can be understood that the two second folded edge portions 440 together form a plane for stably placing the pressure rod 450. Based on the above arrangement, when the blocking member 540 connected to the third connecting rod moves in the opposite direction of the first direction 910 and the second folded edge portion 440 moves in the second direction 930, the pressure rod 450 disposed on the second folded edge portion 440 and the blocking member 540 undergo rolling friction, thereby effectively preventing the rigid second folded edge portion 440 from colliding with the rigid blocking member 540, so that the two are deformed.

[0058] Please refer to Figure 6In order to facilitate manual control of the movement of the first sliding component 400, the operating mechanism chamber 100 also includes a baffle 130. The baffle 130, the fixing plate 410 and the operating shaft 110 are arranged in sequence along the third direction 950. The baffle 130 is provided with an operating hole 131 corresponding to the operating shaft 110 and a second slide groove 133 extending along the second direction 930. The first sliding component 400 also includes a slide rod 460. One end of the slide rod 460 cooperates with the second slide groove 133, and the other end is connected to the first folding portion 430.

[0059] In detail, when the staff pushes the slide bar 460 to move along the second direction 930 and moves to the end of the second slide groove 133, the first folded edge portion 430 exposes the operating hole 131; when the staff does not push the slide bar 460 to move in the opposite direction of the second direction 930 and moves to the other end of the second slide groove 133, the second folded edge portion 440 blocks the operating hole 131.

[0060] Taking this embodiment as an example, the working process and working principle of the ring main unit 10 provided in this application are as follows:

[0061] When the test door 210 is closed, the cable door 310 is closed and the cable door 310 moves along the first direction 910, the unlocking member 600 can act on the locking member 700 to make the push rod 470 cooperate with the fifth sliding groove 750, the hanging rod 830 can lock the first connecting rod, and make the third connecting rod move in the opposite direction of the first direction 910 to avoid the first sliding assembly 400, so that the first sliding assembly 400 can move along the second direction 930 to expose the operating shaft 110;

[0062] When the test door 210 is opened and the cable door 310 is opened, the hanging rod 830 is separated and unlocked from the slot 511, and the blocking member 540 falls back and abuts against the first sliding assembly 400 to make the first sliding assembly 400 move in the opposite direction of the second direction 930. The locking member 700 is reset and the locking push rod 470 is also reset to the initial position, so that the first sliding assembly 400 is double locked, and the first folded edge portion 430 blocks the operating shaft 110.

[0063] In summary, the utility model provides a ring main unit 10, which includes a cabinet body 20 and an interlocking device 30. Among them, when the three conditions of the test door 210 being closed, the cable door 310 being closed, and the cable door 310 moving along the first direction 910 are all met, the second sliding assembly 500 extends to the part of the operating mechanism chamber 100 and moves in the opposite direction of the first direction 910 and avoids the first sliding assembly 400, and the first sliding assembly 400 extends to the part of the test chamber 200 and is unlocked by the unlocking member 600 provided on the test door 210, so that the first sliding assembly 400 can move along the second direction 930 to expose the operating hole 131. That is to say, the test chamber 200 and the cable chamber 300 are interlocked with the operating mechanism chamber 100 through the unlocking member 600 and the locking member 800 provided on their respective doors. Furthermore, it can also be understood that, based on the above-mentioned record that the ring main unit 10 needs to expose the operating shaft 110 when both the test door 210 and the cable door 310 are closed, the ring main unit 10 provided in the present application not only realizes the interlocking between the test room 200 and the cable room 300, but also meets the safety requirements of the five-protection connection.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ring main unit, It is characterized in that It comprises a cabinet (20) and an interlocking device (30); The cabinet (20) comprises an operating mechanism chamber (100) arranged along a first direction (910), a test chamber (200) equipped with a test door (210), and a cable chamber (300) equipped with a cable door (310), and an operating shaft (110) for controlling an earthing switch is arranged in the operating mechanism chamber (100); The interlocking device (30) comprises a first sliding component (400), a second sliding component (500), an unlocking member (600), a locking member (700) and a locking member (800); the first sliding component (400) is slidably connected to a connecting wall arranged between the operating mechanism chamber (100) and the test chamber (200), and the first sliding component (400) partially extends into the test chamber (200); the locking member (700) is slidably connected to the connecting wall; the unlocking member (600) extends along a third direction (950) and the unlocking member (600) is connected to the test door (210); the second sliding component (500) is arranged in the cable chamber (300), and the second sliding component (500) partially extends into the operating mechanism chamber (100) in the opposite direction of the first direction (910), and the locking member (800) is connected to the cable door (310); When the test door (210) is closed, the cable door (310) is closed and the cable door (310) moves along the first direction (910), the unlocking member (600) can act on the locking member (700) to unlock the portion of the first sliding component (400) extending into the test chamber (200), and the locking member (800) can lock the second sliding component (500) to enable the portion of the second sliding component (500) extending into the operating mechanism chamber (100) to move in the opposite direction of the first direction (910) to avoid the first sliding component (400), thereby enabling the first sliding component (400) to move along the second direction (930) to expose the operating shaft (110); Furthermore, there is an angle between the first direction (910) and the second direction (930), there is an angle between the third direction (950) and the first direction (910), and there is an angle between the third direction (950) and the second direction (930).

2. The ring main unit according to claim 1, It is characterized in that The locking member (800) comprises a mounting plate (810) and a hanging rod (830), one side of the mounting plate (810) is connected to the cable door (310), and the other side is connected to the hanging rod (830), and the hanging rod (830) is used to lock the second sliding assembly (500).

3. The ring main unit according to claim 2, It is characterized in that The second sliding assembly (500) includes a first connecting rod (510), a second connecting rod (520) and a third connecting rod (530) which are connected in sequence, and a slot (511) cooperating with the hanging rod (830) is provided at one end of the first connecting rod (510) away from the second connecting rod (520), and the third connecting rod (530) extends into the operating mechanism chamber (100) in the opposite direction of the first direction (910).

4. The ring main unit according to claim 3, It is characterized in that The second sliding assembly (500) further comprises a blocking member (540), wherein the blocking member (540) is connected to the third connecting rod (530), and the blocking member (540) is located in the operating mechanism chamber (100).

5. The ring main unit according to claim 1, It is characterized in that The first sliding assembly (400) includes a fixing plate (410) and a first fixing pin, the fixing plate (410) is provided with a first sliding groove (420) extending along the second direction (930), and the first fixing pin sets the fixing plate (410) on the connecting wall through the first sliding groove (420).

6. The ring main unit according to claim 5, It is characterized in that The fixing plate (410) comprises a first folded edge portion (430) extending in the opposite direction of the first direction (910), and the first folded edge portion (430) is capable of covering or exposing the operating shaft (110).

7. The ring main unit according to claim 6, It is characterized in that The fixed plate (410) further includes a second folded edge portion (440) extending in the opposite direction of the first direction (910), and the second folded edge portion (440) and the first folded edge portion (430) are spaced apart along the second direction (930), and the first sliding assembly (400) further includes a pressure rod (450), and the pressure rod (450) is arranged on the second folded edge portion (440).

8. The ring main unit according to claim 6, It is characterized in that The operating mechanism chamber (100) also includes a baffle (130), and the baffle (130), the fixed plate (410) and the operating shaft (110) are arranged in sequence along the third direction (950). The baffle (130) is provided with an operating hole (131) corresponding to the operating shaft (110) and a second slide groove (133) extending along the second direction (930). The first sliding component (400) also includes a slide rod (460), one end of the slide rod (460) cooperates with the second slide groove (133), and the other end is connected to the first folding portion (430).

9. The ring main unit according to claim 5, It is characterized in that The first sliding assembly (400) further includes a push rod (470), the connecting wall is provided with a third slide groove cooperating with the push rod (470), and the third slide groove extends along the second direction (930), one end of the push rod (470) is connected to the fixing plate (410), and the other end passes through the third slide groove and extends into the test chamber (200), and the unlocking member (600) is provided with a fourth slide groove (610) extending along the second direction (930); When the test door (210) is opened, the locking member (700) can lock the push rod (470); when the test door (210) is closed, the unlocking member (600) can resist the locking member (700) to move along the third direction (950) and enable the push rod (470) to cooperate with the fourth slide groove (610).

10. The ring main unit according to claim 5, It is characterized in that The test chamber (200) is also provided with a reset member (710) and a second fixing pin (730); the locking member (700) is provided with a fifth sliding groove (750), and the second fixing pin (730) sets the locking member (700) on the connecting wall through the fifth sliding groove (750); one end of the reset member (710) is connected to the locking member (700), and the other end is connected to the second fixing pin (730).

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