Mechanical interlocking device of upper isolating ring main unit operating mechanism

Abstract

The utility model discloses a mechanical interlocking device of an upper isolating ring main unit operating mechanism. The mechanical interlocking device comprises a first sliding piece, a second sliding piece and a first supporting piece, the first supporting piece is installed on the circuit breaker operating mechanism, and a strip-shaped hole is formed in the side edge of the first supporting piece. One end of the first sliding sheet is connected with a triangular plate at the tail end of a rotating shaft of the three-station operating mechanism; and the second sliding piece penetrates through the strip-shaped hole of the first supporting piece, one end of the second sliding piece is connected with the other end of the first sliding piece, and the other end of the second sliding piece is close to a closing crow bar on the circuit breaker operating mechanism. According to the mechanical interlocking device of the upper isolating ring main unit operating mechanism, the functions of preventing mistaken opening and closing of a circuit breaker, preventing on-load opening and closing of an isolating switch, grounding interlocking of a cable chamber door, maintaining of a grounding loop and the like are realized through corresponding structures, and the mechanical interlocking device is reliable in interlocking, high in stability, high in safety and simple in structure.

Description

Technical Field

[0001] This utility model mainly relates to the field of ring main unit technology, specifically to a mechanical interlocking device for the operating mechanism of an upper isolation ring main unit. Background Technology

[0002] like Figure 1 As shown, one design scheme for an inflatable ring main unit requires placing the isolating / grounding three-position switch above the circuit breaker, i.e., close to the main busbar, with the circuit breaker below. When grounding the feeder circuit, the grounding switch in the three-position switch must be closed first, followed by closing the circuit breaker to achieve grounding. However, in a scheme where the three-position switch is below the circuit breaker, grounding the feeder circuit only requires closing the grounding switch directly, without needing to close the circuit breaker again. Comparing the two schemes, this scheme transfers the equipment grounding closing capability from the grounding switch to the circuit breaker. While this improves the reliability of equipment grounding closing, it also complicates the operation of the equipment's operating mechanism, making the mechanical interlocks of the operating mechanism more complex. Utility Model Content

[0003] To address the technical problems existing in the prior art, this utility model provides a simple mechanical interlocking device for the operating mechanism of an upper isolation ring main unit.

[0004] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0005] A mechanical interlocking device for the operating mechanism of an upper-isolated ring main unit, the ring main unit including a circuit breaker operating mechanism, on which an isolating / grounding three-position switch operating mechanism is installed, the mechanical interlocking device including a first sliding plate, a second sliding plate, and a first support member; the first support member is installed on the circuit breaker operating mechanism and has a strip-shaped hole on its side; one end of the first sliding plate is connected to a triangular plate at the tail end of the rotating shaft of the three-position operating mechanism; the second sliding plate passes through the strip-shaped hole of the first support member, one end of which is connected to the other end of the first sliding plate, and the other end is close to the closing pry bar on the circuit breaker operating mechanism; when the three-position switch is in the open position, the triangular plate is horizontal, and the first and second sliding plates hang naturally, interfering with the closing pry bar on the circuit breaker operating mechanism; when the three-position switch is in the closed position, the triangular plate rotates, causing the first and second sliding plates to move upward in the strip-shaped hole of the first support member, and the second sliding plate no longer interferes with the closing pry bar.

[0006] As a further improvement to the above technical solution:

[0007] The circuit breaker auxiliary switch end is provided with a circuit breaker rotating shaft piece, and the circuit breaker rotating shaft piece is connected with a baffle connecting piece; when the circuit breaker is closed, the circuit breaker auxiliary switch drives the circuit breaker rotating shaft piece to rotate, drives the baffle connecting piece and the baffle of the three-position switch operating mechanism to move upward, and shields the operating hole of the three-position operating mechanism.

[0008] The three-position switch operating mechanism is provided with a limiting pressing plate on a grounding operating shaft, and the circuit breaker operating mechanism is movably provided with a lower cabinet door pressing rod, and the upper end of the lower cabinet door pressing rod is sequentially provided with a first connecting piece and a third sliding piece from bottom to top, and the upper end of the third sliding piece abuts against the limiting pressing plate.

[0009] The third sliding piece is slidably arranged at one end of the second supporting piece, and the other end of the second supporting piece is fixed to the three-position switch operating mechanism.

[0010] The first connecting piece is fixed at one end of the second connecting piece, the other end of the second connecting piece is slidably arranged in a strip-shaped hole of the third supporting piece, and the third supporting piece is fixed to the circuit breaker operating mechanism.

[0011] The lower cabinet door pressing rod is sleeved with a stretching piece.

[0012] The stretching piece is a spring.

[0013] The other end of the second connecting piece is close to the disconnecting lever, and the second connecting piece moves upward under the stretching of the stretching piece and interferes with the disconnecting lever.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The mechanical interlocking device of the upper isolation ring network cabinet operating mechanism of the utility model realizes the functions of preventing misoperation of the circuit breaker, preventing the isolation switch and the cable room door from being operated under load, cable room door grounding interlocking, grounding loop retention and the like through corresponding structures, is reliable in interlocking, strong in stability, high in safety and simple in structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a circuit principle diagram of the prior art.

[0017] Figure 2 It is a structure diagram of the circuit breaker operating mechanism and the three-position switch operating mechanism in the utility model.

[0018] Figure 3 It is one of the structure diagrams of the mechanical interlocking device in the embodiment of the utility model.

[0019] Figure 4 It is the second structure diagram of the mechanical interlocking device in the embodiment of the utility model.

[0020] Figure 5The utility model discloses a ring main unit in the embodiment structure diagram of example.

[0021] Figure 6 For Figure 5 The utility model discloses a ring main unit in the partial close -up of example.

[0022] Figure 7 The utility model discloses a ring main unit in the lower structure diagram of example.

[0023] Figure 8 The utility model discloses a ring main unit in the cable chamber door structure diagram of example.

[0024] Figure 9 For Figure 8 The utility model discloses a ring main unit in the partial close -up of example.

[0025] Legend: 1, circuit breaker operating mechanism;101, closing lever;102, closing pivot;103, auxiliary switch of circuit breaker;104, circuit breaker pivot piece;105, closing button;106, opening button;107, opening pivot;108, opening lever;2, three-position switch operating mechanism;201, three-position operating mechanism pivot;202, grounding operating shaft;203, triangular plate;204, three-position switch baffle;205, baffle connecting piece;3, first sliding piece;4, second sliding piece;5, third sliding piece;6, first support;7, second support;8, third support;9, limiting pressing plate;10, linkage pressing plate;11, first connecting piece;12, second connecting piece;13, lower cabinet door pressing rod;14, spring;15, cable chamber door;16, side plate;17, square hole;18, U-shaped hole;19, hook. DETAILED DESCRIPTION

[0026] The utility model will be further described below in connection with the drawings and specific embodiments.

[0027] As Figures 2-3 The utility model discloses a ring main unit in the embodiment of isolation ring main unit operating mechanism's mechanical interlock device is provided, wherein the ring main unit includes circuit breaker operating mechanism 1, and the circuit breaker operating mechanism 1 is installed with isolation / grounding three-position switch operating mechanism 2;

[0028] Mechanical interlock device includes first sliding piece 3, second sliding piece 4 and first support 6;First support 6 is installed on circuit breaker operating mechanism 1, and the side edge is opened with strip hole;The one end of first sliding piece 3 is connected with the triangular plate 203 of three-position operating mechanism pivot 201 tail end;Second sliding piece 4 is arranged in the strip hole of first support 6, and one end is connected with the other end of first sliding piece 3, and the other end is close to closing lever 101 on circuit breaker operating mechanism 1.In the operation of ring main unit equipment, isolation knife needs to be closed first, and then circuit breaker can be closed. Figure 3As shown, when the three-position switch is in the open position, the triangular plate 203 is in a horizontal state, at this time, the first sliding piece 3 and the second sliding piece 4 naturally fall, and interfere with the closing lever 101 on the circuit breaker operating mechanism 1. When the closing button 105 is pressed, the closing lever 101 cannot drive the closing shaft 102 to rotate, so that the closing action cannot be completed.

[0029] When the three-position mechanism is closed, the triangular plate 203 rotates, driving the first sliding piece 3 and the second sliding piece 4 to stably move upward in the strip-shaped hole of the first support 6, and the second sliding piece 4 no longer interferes with the closing lever 101; after the installation button is pressed, the closing lever 101 drives the closing shaft 102 to rotate, completing the closing action.

[0030] The circuit breaker auxiliary switch 103 is provided with a circuit breaker shaft piece 104 at the end, and the circuit breaker shaft piece 104 is connected with a baffle connecting piece 205; when the circuit breaker is closed, the circuit breaker auxiliary switch 103 drives the circuit breaker shaft piece 104 to rotate, driving the baffle connecting piece 205 and the baffle of the three-position switch operating mechanism 2 to move upward, shielding the operation hole of the three-position operating mechanism. Specifically, because the disconnecting switch does not have the ability to load switching, when the circuit breaker is in the closed state, the disconnecting switch is not allowed to be operated. When the circuit breaker is in the open state, the circuit breaker shaft piece 104 is in a horizontal state as shown, when the circuit breaker is closed, the circuit breaker auxiliary switch 103 drives the circuit breaker shaft piece 104 to rotate, and when the circuit breaker shaft piece 104 rotates, the baffle connecting piece 205 and the three-position switch baffle 204 move upward, shielding the operation hole of the three-position operating mechanism, so that the operation tool cannot be inserted into the operation hole, avoiding the load operation of the three-position switch. Figure 3 The circuit breaker auxiliary switch 103 is provided with a circuit breaker shaft piece 104 at the end, and the circuit breaker shaft piece 104 is connected with a baffle connecting piece 205; when the circuit breaker is closed, the circuit breaker auxiliary switch 103 drives the circuit breaker shaft piece 104 to rotate, driving the baffle connecting piece 205 and the baffle of the three-position switch operating mechanism 2 to move upward, shielding the operation hole of the three-position operating mechanism. Specifically, because the disconnecting switch does not have the ability to load switching, when the circuit breaker is in the closed state, the disconnecting switch is not allowed to be operated. When the circuit breaker is in the open state, the circuit breaker shaft piece 104 is in a horizontal state as shown, when the circuit breaker is closed, the circuit breaker auxiliary switch 103 drives the circuit breaker shaft piece 104 to rotate, and when the circuit breaker shaft piece 104 rotates, the baffle connecting piece 205 and the three-position switch baffle 204 move upward, shielding the operation hole of the three-position operating mechanism, so that the operation tool cannot be inserted into the operation hole, avoiding the load operation of the three-position switch.

[0031] In addition, in order to prevent mistaken entry into the live interval, only when the power supply equipment once the feeder circuit is in a reliable grounding state, the cable room door 15 of the switch device can be opened.

[0032] As shown in Figures 3-4 The grounding operation shaft 202 of the three-position operating mechanism is provided with a limit pressing plate 9; the lower cabinet door pressing rod 13 is movably arranged on the circuit breaker operating mechanism 1, and the upper end of the lower cabinet door pressing rod 13 is sequentially provided with a first connecting piece 11 and a third sliding piece 5 from bottom to top, and the upper end of the third sliding piece 5 abuts against the limit pressing plate 9.

[0033] As shown in Figure 7 The side plate 16 of the cable room is provided with a rectangular hole 17. As shown in Figures 8-9 The two sides of the cable room door 15 are provided with hooks 19, and the upper end of the cable room door 15 is provided with a U-shaped hole 18.

[0034] As shown in Figures 5-6As shown, the cable chamber door 15 is installed on the cabinet, and due to the design of the hook 19 and the oblong hole 17 of the cable chamber side plate 16, the cable door cannot be pulled out horizontally, and can only be pulled out horizontally after being pulled up first. The U-shaped hole 18 at the upper end of the cable chamber door 15 is clamped with the lower cabinet door pressing rod 13, and when the three-position switch is in the open state, the limiting pressing plate 9 on the grounding operating shaft 202 is pressed on the third sliding piece 5, so that the third sliding piece 5 cannot act upward. When the circuit breaker is in the open state, the connecting pressing plate 10 connected with the circuit breaker rotating shaft piece 104 is pressed on the first connecting piece 11, so that the first sliding piece 3 cannot act upward. Therefore, when the circuit breaker switch or the three-position switch is in the open state, the assembly formed by the third sliding piece 5, the first connecting piece 11 and the lower cabinet door pressing rod 13 cannot act upward, and the cable chamber door 15 cannot be pulled up. When the circuit breaker and the grounding switch are closed, the limiting pressing plate 9 and the connecting pressing plate 10 are rotated to avoid, allowing the assembly formed by the third sliding piece 5, the first connecting piece 11 and the lower cabinet door pressing rod 13 to act upward, so that the cable chamber door 15 can be taken out.

[0035] When the circuit breaker and the grounding switch are in the closed state and the cable chamber door 15 is in the closed state, the lower cabinet door pressing rod 13 is not pulled by the cable chamber door 15, and under the action of the upper spring 14, the assembly formed by the third sliding piece 5, the first connecting piece 11 and the lower cabinet door pressing rod 13 acts upward, drives the second connecting piece 12 to act upward in the square hole 17 of the third supporting piece 8 side plate 16, and the second connecting piece 12 interferes with the disconnection lever 108, so as to avoid the disconnection of the circuit breaker in the case of not installing the cable chamber door 15, thereby avoiding the safety hazard of breaking the grounding loop.

[0036] The mechanical interlocking device of the upper isolation ring network cabinet operating mechanism has the advantages of simple structure, reliable and comprehensive interlocking, high stability and safety.

[0037] In the description of the utility model, it should be understood that the directions or position relations indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model.

[0038] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically defined.

[0039] In the present application, unless otherwise specifically defined and limited, the terms "assembly", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the scope of the present application is within the protection scope of the present application. It should be noted that, for those skilled in the art, some improvements and decorations without departing from the principles of the present application are considered to be within the protection scope of the present application.

Claims

1. A mechanical interlocking device for the operating mechanism of an upper-isolated ring main unit, the ring main unit including a circuit breaker operating mechanism (1), wherein an isolating / grounding three-position switch operating mechanism (2) is installed on the circuit breaker operating mechanism (1), characterized in that, The mechanical interlocking device includes a first sliding plate (3), a second sliding plate (4), and a first support member (6); the first support member (6) is mounted on the circuit breaker operating mechanism (1) and has a strip-shaped hole on its side; one end of the first sliding plate (3) is connected to the triangular plate (203) at the tail end of the rotating shaft (201) of the three-position operating mechanism; the second sliding plate (4) passes through the strip-shaped hole of the first support member (6), one end of which is connected to the other end of the first sliding plate (3), and the other end is close to the circuit breaker operating mechanism (1). The closing pry bar (101); when the three-position switch is in the open position, the triangular plate (203) is in a horizontal state, and the first sliding piece (3) and the second sliding piece (4) hang down naturally, interfering with the closing pry bar (101) on the circuit breaker operating mechanism (1); when the three-position switch is in the closed position, the triangular plate (203) rotates and drives the first sliding piece (3) and the second sliding piece (4) to move upward in the strip hole of the first support (6), and the second sliding piece (4) no longer interferes with the closing pry bar (101).

2. The mechanical interlocking device for the operating mechanism of the upper isolation ring main unit according to claim 1, characterized in that, The circuit breaker auxiliary switch (103) is provided with a circuit breaker rotating shaft (104) at its end. The circuit breaker rotating shaft (104) is connected to a baffle connecting piece (205). When the circuit breaker is closed, the circuit breaker auxiliary switch (103) drives the circuit breaker rotating shaft (104) to rotate, which drives the baffle connecting piece (205) and the baffle of the three-position switch operating mechanism (2) to move upward, blocking the operating hole of the three-position operating mechanism.

3. The mechanical interlocking device for the operating mechanism of the upper isolation ring main unit according to claim 1 or 2, characterized in that, The grounding operating shaft (202) of the three-position switch operating mechanism (2) is provided with a limiting pressure plate (9), and the circuit breaker operating mechanism (1) is provided with a lower cabinet door pressure rod (13). The upper end of the lower cabinet door pressure rod (13) is provided with a first connecting piece (11) and a third sliding piece (5) from bottom to top. The upper end of the third sliding piece (5) abuts against the limiting pressure plate (9).

4. The mechanical interlocking device for the operating mechanism of the upper isolation ring main unit according to claim 3, characterized in that, The third sliding piece (5) is slidably disposed at one end of the second support member (7), and the other end of the second support member (7) is fixed on the three-position switch operating mechanism (2).

5. The mechanical interlocking device for the operating mechanism of the upper isolation ring main unit according to claim 3, characterized in that, The first connecting piece (11) is fixed to one end of the second connecting piece (12), and the other end of the second connecting piece (12) is slidably disposed in the strip hole of the third support member (8). The third support member (8) is fixed on the circuit breaker operating mechanism (1).

6. The mechanical interlocking device for the operating mechanism of the upper isolation ring main unit according to claim 5, characterized in that, A tensioning element is fitted onto the lower cabinet door pressure rod (13).

7. The mechanical interlocking device for the operating mechanism of the upper isolation ring main unit according to claim 6, characterized in that, The tensioning element is a spring (14).

8. The mechanical interlocking device for the operating mechanism of the upper isolation ring main unit according to claim 6, characterized in that, The other end of the second connecting piece (12) is close to the trip lever (108); the second connecting piece (12) moves upward under the tension of the tensioning member and interferes with the trip lever (108).

Images