Lower door interlocking device of ring main unit

Abstract

The utility model relates to a ring main unit lower door interlocking device comprising an interlocking plate which is arranged in a mechanism chamber, and the front end of the interlocking plate is provided with an interlocking rod; the sliding plate moves back and forth in the mechanism chamber, and when the sliding plate is located at the front position and the interlocking plate is located at the upper position, the sliding plate is located below the interlocking plate and limits the interlocking plate to move downwards; a first through hole and two second through holes are formed in the front end of the mechanism chamber, the interlocking rod penetrates out of the first through hole, and the two second through holes correspond to the two sides of the front end of the sliding plate respectively; and the cabinet door is provided with a hanging hole and a pair of top plates. The network cabinet lower door interlocking device is installed in the cabinet body of the ring main unit, when the cabinet door is hung on the cabinet body, no gap exists between the cabinet door and the cabinet body, external dust is prevented from entering the ring main unit to cause pollution, the protection grade of the ring main unit is improved, and the service life of the ring main unit is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a switchgear technical field, concretely relates to a ring main unit lower door interlocking device. BACKGROUND

[0002] According to five prevent interlocking requirements, when the lower door opens, the grounding switch is in the on state, the circuit breaker is in the off state, and all cannot be operated again, thereby guaranteeing the personal safety of the operation installation personnel. The existing SF6 gas insulation ring main unit lower door interlocking device still has a certain gap between the lower door plate, which causes dust and sundries to enter the inside and cause pollution, and the protection level is low.

[0003] The installation structure of the current SF6 gas insulation ring main unit lower door interlocking device usually needs to set a groove for installing the interlocking rod on the upper end of the lower door plate, referring to the prior patent CN210224668U - switchgear door interlocking. Since there is still a certain interval distance between the upper door plate and the lower door plate, in the use process, the dust in the air or other sundries will enter the ring main unit inside from the gap between the interlocking rod and the groove, causing pollution to the internal structure, and reducing the protection level of the ring main unit. The single interlocking rod cannot guarantee that the interlocking and the lower door plate remain horizontal, so that the interlocking and the lower door plate cannot be smoothly, continuously and effectively locked. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, provide a ring main unit lower door interlocking device, and solve the technical problem that the current ring main unit door interlocking exists a gap on the cabinet door after hanging, which causes external pollution to enter the cabinet body through the gap, thereby affecting the protection level of the ring main unit.

[0005] The technical scheme adopted by the utility model to solve the technical problem is:

[0006] Provide a ring main unit lower door interlocking device, which comprises

[0007] The interlocking plate is located in the mechanism chamber, the interlocking rod is arranged at the front end of the interlocking plate, the interlocking plate is connected with the mechanism lock plate, and the mechanism lock plate is suitable for driving the interlocking plate to move up and down in the mechanism chamber;

[0008] The sliding plate moves forward and backward in the mechanism chamber, when the sliding plate is located at the front position and the interlocking plate is located at the upper position, the sliding plate is located below the interlocking plate at this time, and the interlocking plate is limited to move downward;

[0009] A first perforation and two second perforations are formed at the front end of the mechanism chamber, the interlocking rod passes out from the first perforation, and the two second perforations correspond to the two sides of the front end of the sliding plate respectively;

[0010] The cabinet door is provided with a hanging hole and a pair of top plates.

[0011] When the cabinet door is hung, the cabinet door is first translated, the interlocking rod is inserted into the hanging hole, the two top plates are inserted from the second perforation and abut against the two sides of the sliding plate, the sliding plate is driven to move from the front position to the rear position, at this time, the interlocking plate is unlocked, then the cabinet door drives the interlocking plate to move downward to the lower position, at this time, the interlocking plate shields the first perforation, and the cabinet door shields the second perforation.

[0012] Further, a fixed limiting plate is arranged in the mechanism chamber, the fixed limiting plate is in a U-shaped structure, the fixed limiting plate is fixed on the bottom plate of the mechanism chamber, the sliding plate passes through the U-shaped groove of the fixed limiting plate, a tension spring is arranged between the fixed plate limiting plate and the rear end of the sliding plate, and the tension spring pulls the sliding plate to make the sliding plate keep a tendency of moving forward.

[0013] Further, a avoiding groove is arranged in the middle of the front end of the sliding plate, when the sliding plate is in the rear position, the interlocking plate passes through the avoiding groove;

[0014] Abutting plates are formed on the sliding plate on the two sides of the avoiding groove, and the abutting plates correspond to the front and rear of the second perforation;

[0015] A pair of connecting plates are arranged at the rear end of the sliding plate, the connecting plates are upwardly arranged, and the connecting plates are suitable for being connected with the tension spring.

[0016] Further, a pair of guide grooves are arranged on the interlocking plate, a pair of limiting screws are arranged at the front end of the mechanism chamber, the two limiting screws are located on the two sides of the first perforation, and the limiting screws pass through the guide grooves to guide the interlocking plate to move up and down.

[0017] Further, a limiting switch is arranged on the interlocking plate.

[0018] Further, the interlocking rod is located at the middle position of the cabinet body.

[0019] The net cabinet lower door interlocking device has the advantages that:

[0020] The net cabinet lower door interlocking device is installed in the cabinet body of the ring net cabinet, when the cabinet door is hung on the cabinet body, no gap exists between the cabinet door and the cabinet body, dust in the outside world is prevented from entering the ring net cabinet to cause pollution, the protection level of the ring net cabinet is improved, and the service life of the ring net cabinet is prolonged.

[0021] The interlocking device can prevent the staff from operating in the live state, improves the safety of the whole ring net cabinet, meets the interlocking requirement of the cabinet door of the SF6 gas insulated alternating current metal enclosed switch device under the condition of live and grounding, has good locking performance, is simple to operate, simple in manufacturing process, low in processing cost and convenient to assemble. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model is further illustrated below with reference to the drawings.

[0023] Figure 1 Is the schematic diagram of ring main unit;

[0024] Figure 2 Is the schematic diagram of cabinet door;

[0025] Figure 3 It is the structure diagram between three position mechanism, door interlock device and bottom plate;

[0026] Figure 4 It is the schematic diagram of three position mechanism and interlock plate;

[0027] Figure 5 It is the structure diagram of bottom plate, upper crossbeam and lower crossbeam;

[0028] Figure 6 It is the schematic diagram of interlock plate;

[0029] Figure 7 It is the schematic diagram of sliding plate;

[0030] Figure 8 It is the schematic diagram of fixed limiting plate;

[0031] Figure 9 It is the schematic diagram of interlock plate moving down from the front end of sliding plate avoiding groove;

[0032] Figure 10 It is the schematic diagram of sliding plate abutting interlock plate lower end;

[0033] Figure 11 It is the schematic diagram of cabinet door translating to cabinet body;

[0034] Figure 12 It is the schematic diagram of cabinet door hanging on cabinet body;

[0035] Wherein, 11, mechanism chamber, 12, cable chamber, 13, bottom plate, 14, lower crossbeam, 15, upper crossbeam, 16, first perforation, 17, second perforation;

[0036] 2, cabinet door, 21, hanging hole, 22, top plate;

[0037] 3, sliding plate, 31, avoiding groove, 32, abutment plate, 33, connecting plate;

[0038] 4, fixed limiting plate, 41, tension spring;

[0039] 5, interlock plate, 51, interlock rod, 52, guide groove, 53, limiting screw;

[0040] 6, three position mechanism, 61, mechanism lock plate, 62, limiting rod, 63, reset spring, 64, limit switch. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the utility model will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0042] The application provides a ring main unit lower door interlocking device, which is described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the application. Moreover, the description of each embodiment in the following embodiments has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0043] To solve the technical problem that the gap exists on the cabinet body after the door 2 interlocking of the ring main unit is hung, so that external pollution can enter the cabinet body through the gap, thereby affecting the protection grade of the ring main unit, an embodiment of the application provides a ring main unit lower door interlocking device. The following is described in detail.

[0044] As shown in Figure 1 The ring main unit includes a cabinet body and a door 2, the cabinet body includes an upper mechanism chamber 11 and a lower cable chamber 12, a three-position mechanism 6 is installed in the mechanism chamber 11, and a circuit breaker mechanism is installed in the cable chamber 12 and connected with external cables, and the door 2 is hung and installed in front of the cable chamber 12.

[0045] A bottom plate 13 is arranged below the mechanism chamber 11 to separate the mechanism chamber 11 from the cable chamber 12.

[0046] The three-position mechanism 6 is provided with a mechanism lock plate 61 and a limiting rod 62, the mechanism lock plate 61 moves up and down elastically, a return spring 63 is arranged between the mechanism lock plate 61 and the three-position mechanism 6, the spring is compressed under stress when the mechanism lock plate 61 moves downward, the limiting rod 62 rotates, the mechanism lock plate 61 and the limiting rod 62 are linked, the limiting rod 62 cooperates with a grounding operating shaft in the three-position mechanism 6, when the grounding operating shaft is in a grounding opening position, a buckle on the grounding operating shaft abuts against the limiting rod 62, so as to limit the rotation of the limiting rod 62, that is, to limit the up-and-down movement of the mechanism lock plate 61. For specific principles, please refer to the prior patent CN210224668U-switch cabinet door 2 interlocking.

[0047] The ring main unit lower door interlocking device of the present patent application is introduced below.

[0048] As shown in Figures 1 to 11 A ring main unit lower door interlocking device includes

[0049] An interlocking plate 5 is arranged in the mechanism chamber 11, and an interlocking rod 51 is arranged at the front end of the interlocking plate 5. The interlocking plate 5 is connected with a mechanism lock plate 61, and the mechanism lock plate 61 is adapted to drive the interlocking plate 5 to move up and down in the mechanism chamber 11;

[0050] A sliding plate 3 is arranged in the mechanism chamber 11 and moves forward and backward. When the sliding plate 3 is located at the front position and the interlocking plate 5 is located at the upper position, the sliding plate 3 is located below the interlocking plate 5 and limits the downward movement of the interlocking plate 5;

[0051] A first through hole 16 and two second through holes 17 are arranged at the front end of the mechanism chamber 11. The interlocking rod 51 passes through the first through hole 16, and the two second through holes 17 correspond to the two sides of the front end of the sliding plate 3, respectively;

[0052] A cabinet door 2 is arranged, and a hanging hole 21 and a pair of top plates 22 are arranged on the cabinet door 2;

[0053] As shown in Figure 2 , the upper beam of the cabinet door 2 is provided with the hanging hole 21 and the riveted top plate 22. The hanging hole 21 is located at the top, and the top plate 22 is located at the bottom.

[0054] Specifically, as an optional embodiment in the embodiment, as shown in Figures 6 to 10 , a fixed limiting plate 4 is arranged in the mechanism chamber 11. The fixed limiting plate 4 has a U-shaped structure, and is fixed to the bottom plate 13 of the mechanism chamber 11. The sliding plate 3 passes through the U-shaped groove of the fixed limiting plate 4. A tension spring 41 is arranged between the fixed limiting plate and the rear end of the sliding plate 3. The tension spring 41 pulls the sliding plate 3 to make the sliding plate 3 keep a tendency of moving forward.

[0055] In the embodiment, the number of the tension spring 41 is two, and the two tension springs 41 are connected to the two sides of the rear end of the sliding plate 3, respectively.

[0056] Specifically, as an optional embodiment in the embodiment, as shown in Figure 7 , an avoiding groove 31 is arranged at the middle part of the front end of the sliding plate 3. When the sliding plate 3 is located at the rear position, the interlocking plate 5 passes through the avoiding groove 31;

[0057] The avoiding groove 31 is formed with an abutting plate 32 on the two sides of the sliding plate 3. The abutting plate 32 corresponds to the front and rear of the second through hole 17.

[0058] A pair of connecting plates 33 are arranged at the rear end of the sliding plate 3. The connecting plates 33 are arranged upward, and are adapted to connect the tension spring 41.

[0059] When the connecting plate 33 moves forward with the sliding plate 3, the connecting plate 33 abuts against the rear end of the fixed limiting plate 4, and the sliding plate 3 stops moving forward. At this time, the sliding plate 3 is in the front position.

[0060] In this embodiment, as Figure 7 As shown, the abutment plate 32 is long and narrow, and a corresponding groove is opened on the bottom plate 13. The lower end of the abutment plate 32 passes through the groove and extends into the cable chamber 12. The length of the abutment plate 32 corresponds to the length of the second through hole 17. When the cabinet door 2 moves the top plate 22 up and down, the front end of the top plate 22 is always in contact with the abutment plate.

[0061] Specifically, as an optional implementation method in this embodiment, such as Figure 6 As shown, a pair of guide grooves 52 are provided on the interlocking plate 5, and a pair of limiting screws 53 are provided at the front end of the mechanism chamber 11. The two limiting screws 53 are located on both sides of the first through hole 16. The limiting screws 53 pass through the guide grooves 52, thereby guiding the interlocking plate 5 to move up and down.

[0062] Specifically, as an optional implementation method in this embodiment, such as Figure 3 As shown, a limit switch 64 is provided on the locking plate 61 of the mechanism.

[0063] Specifically, the limit switch 64 is connected to the mechanism lock plate 61 through the mounting plate. When the interlock plate 5 moves the mechanism lock plate 61 to the lower position, it drives the limit switch 64 to cooperate with the base plate 13, triggering the limit switch 64 to provide an electrical signal for the lower door to be closed in place, which facilitates the later addition of electrical signal points.

[0064] Specifically, as an optional implementation method in this embodiment, such as Figure 5 As shown, the interlocking rod 51 is located in the middle of the cabinet. This structure ensures that the cabinet door 2 is closed with uniform force and smooth closure.

[0065] In this embodiment, as Figure 5 As shown, the bottom of the mechanism chamber 11 is a base plate 13, and a lower crossbeam 14 is provided at the front end of the base plate 13. The top of the cable chamber 12 is a base plate 13, and an upper crossbeam 15 is provided at the front end of the cable chamber 12.

[0066] The limiting screw 53 is provided on the lower crossbeam 14. The first through hole 16 is opened in the lower crossbeam 14. The upper part of the second through hole 17 is opened in the lower crossbeam 14, and the lower part of the second through hole 17 is opened in the upper crossbeam 15.

[0067] The first perforation 16 is located above the middle of the two second perforations 17, and the upper end of the second perforation 17 is basically flush with the lower end of the first perforation 16.

[0068] The following describes the working process of the bottom door interlocking device of the ring main unit:

[0069] When the cabinet door 2 is hung, the cabinet door 2 is translated towards the cable chamber 12, the interlocking rod 51 is inserted into the hanging hole 21, the two top plates 22 are inserted from the second perforation 17 and abut against the two abutment plates 32 of the sliding plate 3, and the sliding plate 3 is driven to move from the front position to the rear position, as shown in Figure 10 The front end of the sliding plate 3 abuts against the lower end of the interlocking plate 5, and as the sliding plate 3 moves to the rear position, the interlocking plate 5 is unlocked, and then the cabinet door 2 drives the interlocking plate 5 to move downwards to the lower position, as shown in Figure 9 At this time, the interlocking plate 5 shields the first perforation 16, and the cabinet door 2 shields the second perforation 17.

[0070] When the cabinet door 2 is hung, the cabinet door 2 is translated towards the cable chamber 12, the interlocking rod 51 is inserted into the hanging hole 21, the two top plates 22 are inserted from the second perforation 17 and abut against the two abutment plates 32 of the sliding plate 3, and the sliding plate 3 is driven to move from the front position to the rear position, as shown in

[0071] When the cabinet door 2 is hung, the cabinet door 2 is translated towards the cable chamber 12, the interlocking rod 51 is inserted into the hanging hole 21, the two top plates 22 are inserted from the second perforation 17 and abut against the two abutment plates 32 of the sliding plate 3, and the sliding plate 3 is driven to move from the front position to the rear position, as shown in

[0072] The ring main unit lower door interlocking device is installed in the cabinet body of the ring main unit, when the cabinet door 2 is hung on the cabinet body, there is no gap between the cabinet door 2 and the cabinet body, dust in the outside is prevented from entering the ring main unit to cause pollution, the protection level of the ring main unit is improved, and the service life of the ring main unit is prolonged.

[0073] In the present application, each device (parts without specific structure) is a general standard part or a part known to those skilled in the art, and its structure and principle can be known by technical personnel through a technical manual or through a conventional experimental method.

[0074] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] In the description of the utility model, it is necessary to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0076] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interface, device or unit, which can be electrical, mechanical or other forms.

[0077] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0078] In addition, the functional units in each embodiment of the utility model can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0079] Based on the above ideal embodiments according to the utility model, through the above description, relevant staff can make various changes and modifications without deviating from the scope of the technical idea of the utility model. The technical scope of the utility model is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A ring main unit lower door interlocking device, characterized in that, The invention relates to a lower door interlocking device of a ring main unit, which comprises: an interlocking plate (5) located in a mechanism chamber (11), the front end of the interlocking plate (5) is provided with an interlocking rod (51), the interlocking plate (5) is connected with a mechanism lock plate (61) which is adapted to drive the interlocking plate (5) to move up and down in the mechanism chamber (11); a sliding plate (3) which moves forward and backward in the mechanism chamber (11), when the sliding plate (3) is located at the front position and the interlocking plate (5) is located at the upper position, the sliding plate (3) is located below the interlocking plate (5) and limits the downward movement of the interlocking plate (5); a first through hole (16) and two second through holes (17) are formed at the front end of the mechanism chamber (11), the interlocking rod (51) passes through the first through hole (16), and the two second through holes (17) correspond to the two sides of the front end of the sliding plate (3) respectively; a cabinet door (2) which is provided with a hanging hole (21) and a pair of top plates (22); when the cabinet door (2) is hung, the cabinet door (2) moves first, the interlocking rod (51) is inserted into the hanging hole (21), the two top plates (22) are inserted into the second through holes (17) and abut against the two sides of the sliding plate (3), thereby driving the sliding plate (3) to move from the front position to the rear position, at this time, the interlocking plate (5) is unlocked, and then the cabinet door (2) drives the interlocking plate (5) to move downward to the lower position, at this time, the interlocking plate (5) blocks the first through hole (16), and the cabinet door (2) blocks the second through hole (17).

2. The lower door interlocking device of a ring main unit according to claim 1, characterized in that: a fixed limiting plate (4) is arranged in the mechanism chamber (11), the fixed limiting plate (4) has a U-shaped structure, the fixed limiting plate (4) is fixed on the bottom plate (13) of the mechanism chamber (11), the sliding plate (3) passes through the U-shaped groove of the fixed limiting plate (4), a tension spring (41) is arranged between the fixed limiting plate (4) and the rear end of the sliding plate (3), the tension spring (41) drives the sliding plate (3) to keep the tendency of moving forward.

3. The lower door interlocking device of a ring main unit according to claim 1, characterized in that: an avoiding groove (31) is arranged at the front end of the sliding plate (3), when the sliding plate (3) is at the rear position, the interlocking plate (5) passes through the avoiding groove (31); abutment plates (32) are formed on the sliding plate (3) on both sides of the avoiding groove (31), the abutment plates (32) correspond to the front and rear of the second through hole (17); a pair of connecting plates (33) are arranged at the rear end of the sliding plate (3), the connecting plates (33) are arranged upward, and the connecting plates (33) are adapted to connect the tension spring (41).

4. The lower door interlocking device of a ring main unit according to claim 1, characterized in that: a pair of guide grooves (52) are formed on the interlocking plate (5), a pair of limiting screws (53) are arranged at the front end of the mechanism chamber (11), the two limiting screws (53) are located on both sides of the first through hole (16) respectively, and the limiting screws (53) pass through the guide grooves (52), thereby guiding the interlocking plate (5) to move up and down.

5. The lower door interlocking device of a ring main unit according to claim 1, characterized in that: The limit switch is arranged on the mechanism lock plate (61).

6. The interlocking device for the lower door of the ring main unit according to claim 1, characterized in that, The interlocking rod (51) is located at the middle position of the cabinet.

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