Five-prevention interlocking ring main unit

Abstract

The utility model relates to a five-prevention interlocking ring main unit, which comprises a cabinet body, a circuit breaker closing button, an isolation operation hole and a grounding operation hole are arranged on the cabinet body, and the five-prevention interlocking ring main unit is characterized by further comprising a circuit breaker closing cam, an isolation rotating baffle plate, a grounding rotating baffle plate and an interlocking mechanism, the circuit breaker closing cam is in transmission connection with an opening and closing main shaft of the circuit breaker, the isolation rotating baffle plate and the grounding rotating baffle plate are rotatably mounted on the cabinet body, the isolation rotating baffle plate corresponds to the isolation operation hole, and the grounding rotating baffle plate corresponds to the grounding operation hole; the interlocking mechanism is provided with a circuit breaker linkage end which is in linkage cooperation with the circuit breaker closing cam, an isolation operation linkage end which is in linkage cooperation with the isolation rotation baffle plate, and a grounding operation linkage end which is in linkage cooperation with the grounding rotation baffle plate. According to the five-prevention interlocking ring main unit, linkage interlocking indication can be carried out according to the power-off operation sequence of the circuit breaker, the disconnecting switch and the grounding switch, and potential electrical safety hazards possibly existing in the power-off operation of the ring main unit are eradicated.

Description

Technical Field

[0001] The utility model relates to a ring network cabinet, in particular to a five-protection interlocking ring network cabinet. Background Art

[0002] The ring main unit needs to meet the "five protection" functions in electrical operation, namely, preventing the circuit breaker from opening / closing by mistake, preventing the disconnector from opening / closing with load, preventing the grounding wire (grounding switch) from being hung (closed) with power on, preventing the circuit breaker from being closed with the grounding wire (grounding switch), and preventing the circuit breaker from being closed with the grounding wire (grounding switch), and preventing the circuit breaker from being mistakenly entered into the live compartment. However, in actual operation, since the isolation operation holes and grounding operation holes on the ring main unit are directly exposed on the cabinet body, if the markings are not clear, some operation errors may still occur, such as closing the disconnector or grounding switch when the circuit breaker is closed, or closing the disconnector and grounding switch at the same time, which poses a serious electrical safety hazard. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a five-protection interlocking ring main unit, which can provide linkage interlocking instructions according to the power-off operation sequence of the circuit breaker, the isolating switch, and the grounding switch, so that the ring main unit has a stable five-protection function and eliminates the electrical safety hazards that may exist in the power-off operation of the ring main unit. The technical solution adopted is as follows:

[0004] A five-protection interlocking ring network cabinet comprises a cabinet body, on which a circuit breaker closing button for opening and closing a circuit breaker, an isolating operation hole for operating an isolating switch, and a grounding operation hole for operating an grounding switch are provided, characterized in that: the cabinet body is also provided with a circuit breaker closing cam, an isolating rotating baffle, a grounding rotating baffle and an interlocking mechanism; the circuit breaker closing cam is drivingly connected to the opening and closing main shaft of the circuit breaker, the isolating rotating baffle and the grounding rotating baffle can be rotatably mounted on the cabinet body, the isolating rotating baffle corresponds to the position of the isolating operation hole, and the grounding rotating baffle corresponds to the position of the grounding operation hole; the interlocking mechanism is provided with a circuit breaker linkage end, an isolating operation linkage end and a grounding operation linkage end, the circuit breaker linkage end is linked to the circuit breaker closing cam, the isolating operation linkage end is linked to the isolating rotating baffle, and the grounding operation linkage end is linked to the grounding rotating baffle.

[0005] Usually, on a general ring main unit, the circuit breaker is installed on the upper part of the ring main unit, the isolating switch and the grounding switch are installed in the middle part of the ring main unit, the circuit breaker closing button is located at the upper part of the ring main unit, the isolating operation hole and the grounding operation hole are located in the middle part of the ring main unit and are arranged on the left and right sides below the circuit breaker closing button.

[0006] The circuit breaker closing cam is drivingly connected to the circuit breaker opening and closing main shaft. When the circuit breaker closing button is pressed or released, the circuit breaker opening and closing main shaft is triggered to rotate accordingly, causing the circuit breaker closing cam to rotate accordingly.

[0007] The above-mentioned linkage of the circuit breaker linkage end with the circuit breaker closing button, the linkage of the isolation operation linkage end with the isolation rotating baffle, and the linkage of the grounding operation linkage end with the grounding rotating baffle refer to that in the actual operation process, according to the power-off operation process of the ring network cabinet, the opening and closing conditions of the circuit breaker and the operation conditions of the isolation switch and the grounding switch are mutually restrained, specifically:

[0008] (1) First, open the circuit breaker: When the circuit breaker closing button is pressed, the circuit breaker closing cam rotates, and the circuit breaker linkage end of the interlocking mechanism changes. The interlocking mechanism drives the isolation operation linkage end and the grounding operation linkage end to respectively cooperate with the isolation rotating baffle and the grounding rotating baffle, so that the isolation rotating baffle blocks the isolation operation hole and the grounding rotating baffle blocks the grounding operation hole, making it impossible to operate the isolation switch and the grounding switch;

[0009] (2) Secondly, disconnecting the disconnector: When the circuit breaker is disconnected and the disconnector is to be disconnected, the disconnecting rotary baffle is turned, and the disconnecting rotary baffle cooperates with the disconnecting operation linkage end, and the circuit breaker linkage end and the grounding operation linkage end are driven by the interlocking mechanism to cooperate with the circuit breaker closing cam and the grounding rotary baffle respectively, so that the circuit breaker closing cam cannot rotate, and then the circuit breaker closing button cannot be pressed to close the circuit breaker. At the same time, the grounding rotary baffle blocks the grounding operation hole, and the closing operation of the grounding switch cannot be performed;

[0010] (3) Finally, close the earthing switch: When the circuit breaker is opened and the isolating switch has been opened, and the earthing switch is to be closed, turn the earthing rotary baffle, which will work in conjunction with the earthing operation linkage end. Through the interlocking mechanism, the circuit breaker linkage end and the isolating operation linkage end will respectively work in conjunction with the circuit breaker closing cam and the isolating rotary baffle, so that the circuit breaker closing cam cannot rotate, and the circuit breaker closing button cannot be pressed to close the circuit breaker. At the same time, the isolating rotary baffle blocks the isolating operation hole, making it impossible to close the isolating switch.

[0011] As a preferred embodiment of the utility model, the interlocking mechanism includes a first interlocking piece, which can be moved up and down and installed on the cabinet; the upper end of the first interlocking piece serves as the circuit breaker linkage end and contacts and cooperates with the convex portion of the circuit breaker closing cam; the lower end of the first interlocking piece is located between the isolation operation hole and the grounding operation hole, the lower left portion of the first interlocking piece serves as the isolation operation linkage end and contacts and cooperates with the isolation rotating baffle, and the lower right portion of the first interlocking piece serves as the grounding operation linkage end and contacts and cooperates with the grounding rotating baffle; the rotation axis of the isolation rotating baffle is located between the isolation operation hole and the lower left portion of the first interlocking piece, and the rotation axis of the grounding rotating baffle is located between the grounding operation hole and the lower right portion of the first interlocking piece.

[0012] When the circuit breaker closing button is pressed, the main shaft of the circuit breaker rotates to close the circuit, and at the same time drives the circuit breaker closing cam to rotate and press down the upper end of the first interlocking member, so that the first interlocking member moves downward; in the process of the lower end of the first interlocking member moving downward, it presses down the isolating rotating baffle and the grounding rotating baffle, thereby causing the isolating rotating baffle to rotate toward one side of the isolating operating hole, and the grounding rotating baffle to rotate toward one side of the grounding operating hole, and finally respectively block the isolating operating hole and the grounding operating hole, so that the operator cannot perform manual opening operations of the isolating switch and the grounding switch.

[0013] As a further preferred embodiment of the present invention, the interlocking mechanism also includes a second interlocking member and a third interlocking member, the second interlocking member can be moved up and down and installed on the cabinet; the upper end of the second interlocking member is linked with the circuit breaker closing button, and the lower part of the second interlocking member is connected to the transmission shaft of the isolating switch; the third interlocking member can be swingably installed on the cabinet and is located between the isolating rotating baffle and the grounding rotating baffle.

[0014] When the circuit breaker is opened and the isolating switch opening operation is to be performed, the isolating rotating baffle is pushed to open the isolating operation hole. While the isolating rotating baffle swings, the third interlocking member is driven to swing toward the grounding operation hole. The swing of the third interlocking member pushes the grounding rotating baffle to swing toward the grounding operation hole, and finally blocks the grounding operation hole, making it impossible for the operator to manually close the grounding switch.

[0015] After opening the isolation operation hole, the operator performs the opening operation of the isolation switch. At this time, the transmission shaft of the isolation switch drives the second interlocking member to move upward, and finally the upper end of the second interlocking member jams the circuit breaker closing button, making the circuit breaker unable to perform the closing operation.

[0016] When the opening operation of the isolating switch is completed and the grounding switch is to be closed, the grounding rotating baffle is turned to open the grounding operating hole, and the grounding rotating baffle swings to one side of the isolating operating hole, driving the swing of the third interlocking member to push the isolating rotating baffle to one side of the isolating operating hole, and finally blocking the isolating operating hole, making it impossible for the operator to manually close the isolating switch.

[0017] As a further preferred solution of the utility model, the third interlocking member includes a position indicator and a toggle lever, the position indicator can be swingably mounted on the cabinet, and the toggle lever is arranged on the rear side of the position indicator and between the isolation rotating baffle and the grounding rotating baffle. The toggle lever is used as an interlocking member between the isolation rotating baffle and the grounding rotating baffle, and the position indicator can indicate the position of the current operation, further reminding the operator of the current state of the ring main unit.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The utility model discloses a five-protection interlocking ring network cabinet, and a circuit breaker closing cam, an isolating rotating baffle, a grounding rotating baffle and an interlocking mechanism are added to the cabinet body, and the interlocking mechanism is provided with a circuit breaker linkage end, an isolating operation linkage end and a grounding operation linkage end. Through the linkage cooperation of each linkage end of the interlocking mechanism with the circuit breaker closing cam, the isolating rotating baffle and the grounding rotating baffle, the ring network cabinet has an operation linkage interlocking indication, and thus has a stable five-protection function. The operator must strictly operate in accordance with the power-off sequence of the circuit breaker, the isolating switch and the grounding switch, and eliminates the electrical safety hazards that may exist in the power-off operation of the ring network cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of a preferred embodiment of the utility model;

[0021] Figure 2 for Figure 1 Side view (the main body of the cabinet is omitted);

[0022] Figure 3 It is a schematic diagram of the status of the isolating rotating baffle and the grounding rotating baffle when the circuit breaker is closed;

[0023] Figure 4 It is a schematic diagram of the state when the circuit breaker is opened and the disconnector is opened;

[0024] Figure 5 for Figure 4 Side view of

[0025] Figure 6 This is a schematic diagram of the state when the circuit breaker and the isolating switch are opened and the grounding switch is closed;

[0026] Among them, the markings are: 1-cabinet, 2-circuit breaker closing button, 3-isolation operation hole, 4-grounding operation hole, 5-circuit breaker closing cam, 6-isolation rotating baffle, 7-grounding rotating baffle, 8-first interlocking member, 9-second interlocking member, 10-position indicator plate, 11-toggle lever. DETAILED DESCRIPTION

[0027] The following is a further description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0028] like Figures 1 to 6 As shown, a five-protection interlocking ring network cabinet comprises a cabinet body 1, on which a circuit breaker closing button 2 for opening and closing the circuit breaker, an isolating operation hole 3 for operating the isolating switch, a grounding operation hole 4 for operating the grounding switch, a circuit breaker closing cam 5, an isolating rotating baffle 6, a grounding rotating baffle 7 and an interlocking mechanism are provided; in the prior art, the circuit breaker is installed on the upper part of the ring network cabinet, the isolating switch and the grounding switch are installed in the middle part of the ring network cabinet, the circuit breaker closing button 2 is correspondingly located at the upper part of the ring network cabinet, the isolating operation hole 3, the grounding operation hole 4 are provided on the cabinet body 1, and the circuit breaker closing cam 5, the isolating rotating baffle 6, the grounding rotating baffle 7 and the interlocking mechanism are provided; in the prior art, the circuit breaker is installed on the upper part of the ring network cabinet, the isolating switch and the grounding switch are installed in the middle part of the ring network cabinet, the circuit breaker closing button 2 is correspondingly located at the upper part of the ring network cabinet, the isolating operation hole 3, the grounding operation hole 4 are provided on the cabinet body 1, and ... cam 5, the isolating rotating baffle 6, the grounding rotating baffle 7 and the interlocking mechanism are provided on the cabinet body 1; 4 are respectively located in the middle of the ring network cabinet and are arranged on the left and right sides below the circuit breaker closing button 2; the circuit breaker closing cam 5 is transmission-connected with the circuit breaker's opening and closing main shaft (not shown in the figure), and when the circuit breaker closing button 2 is pressed or released, the circuit breaker's opening and closing main shaft is triggered to rotate accordingly, so that the circuit breaker closing cam 5 rotates accordingly; the isolation rotating baffle 6 and the grounding rotating baffle 7 can be rotatably mounted on the cabinet body 1, the isolation rotating baffle 6 corresponds to the position of the isolation operating hole 3, and the grounding rotating baffle 7 corresponds to the position of the grounding operating hole 4.

[0029] like Figures 1 to 6As shown, the interlocking mechanism includes a first interlocking member 8, a second interlocking member 9 and a third interlocking member. In this embodiment, the third interlocking member includes a position indicator 10 and a toggle lever 11; the first interlocking member 8 can be installed on the cabinet 1 in an upward and downward manner, and the upper end of the first interlocking member 8 is in contact with the convex part of the circuit breaker closing cam 5 as a circuit breaker linkage end; the lower end of the first interlocking member 8 is located between the isolation operation hole 3 and the grounding operation hole 4, the left part of the lower end of the first interlocking member 8 is in contact with the isolation rotating baffle 6 as an isolation operation linkage end, and the right part of the lower end of the first interlocking member 8 is in contact with the grounding rotating baffle as a grounding operation linkage end. 7 contact cooperation; the rotation axis of the isolation rotary baffle 6 is located between the isolation operation hole 3 and the lower left part of the first interlocking member 8, and the rotation axis of the grounding rotary baffle 7 is located between the grounding operation hole 4 and the lower right part of the first interlocking member 8; the second interlocking member 9 can be installed on the cabinet 1 for vertical movement, the upper end of the second interlocking member 9 is linked with the circuit breaker closing button 2, and the lower part of the second interlocking member 9 is connected with the transmission shaft of the isolating switch; the position indicator 10 can be swingably installed on the cabinet 1, and the toggle rod 11 is arranged on the rear side of the position indicator 10 and is located between the isolation rotary baffle 6 and the grounding rotary baffle 7.

[0030] When operating in the power-off sequence of the circuit breaker, disconnector, and earthing switch, specifically, the following processes are included:

[0031] (1) Opening circuit breaker: Figure 3 As shown, when the circuit breaker closing button 2 is pressed, the main shaft of the circuit breaker rotates to close the circuit, and at the same time drives the circuit breaker closing cam 5 to rotate and press down the upper end of the first interlocking member 8, so that the first interlocking member 8 moves downward; in the process of the lower end of the first interlocking member 8 moving downward, it presses down the isolation rotating baffle 6 and the grounding rotating baffle 7, thereby causing the isolation rotating baffle 6 to rotate toward one side of the isolation operating hole 3 and the grounding rotating baffle 7 to rotate toward one side of the grounding operating hole 4, and finally respectively cover the isolation operating hole 3 and the grounding operating hole 4, so that the operator cannot perform corresponding operations on the isolation switch and the grounding switch;

[0032] (2) Disconnector: Figure 4 and Figure 5As shown, when the circuit breaker is opened and the disconnector is to be opened, the isolation rotating baffle 6 is toggled to open the isolation operation hole 3. When the isolation rotating baffle 6 swings, the position indicator 10 is driven to swing toward the grounding operation hole 4. The toggle lever 11 on the rear side of the position indicator 10 is used to make the toggle lever 11 push the grounding rotating baffle 7 to swing toward the grounding operation hole 4 during the swinging of the position indicator 10, and finally make the grounding rotating baffle 7 cover the grounding operation hole 4, so that the operator cannot perform the manual closing operation of the grounding switch; after opening the isolation operation hole 3, the operator performs the opening operation of the disconnector again. At this time, the transmission shaft of the disconnector is driven to drive the second interlocking member 9 to move upward, and finally make the upper end of the second interlocking member 9 clamp the circuit breaker closing button 2, so that the circuit breaker cannot be closed;

[0033] (3) Closing earthing switch: Figure 6 As shown, when the circuit breaker is opened and the isolating switch has been opened, and the grounding switch closing operation is to be performed, the grounding rotating baffle 7 is toggled to open the grounding operation hole 4, and the position indicator 10 is driven to swing toward the side of the isolating operation hole 3 while the grounding rotating baffle 7 swings. The toggle rod 11 on the rear side of the position indicator 10 is used to make the toggle rod 11 push the isolating rotating baffle 6 to swing toward the side of the isolating operation hole 3 during the swinging of the position indicator 10, and finally the isolating rotating baffle 6 blocks the isolating operation hole 3, so that the operator cannot perform the manual closing operation of the isolating switch.

[0034] The five-protection interlocking ring network cabinet of the utility model is additionally provided with a circuit breaker closing cam 5, an isolating rotating baffle 6, a grounding rotating baffle 7 and an interlocking mechanism on a cabinet body 1, and the first interlocking member 8, the second interlocking member 9, the position indicator plate 10 and the toggle lever 11 of the interlocking mechanism are coordinated with the circuit breaker closing cam 5, the isolating rotating baffle 6 and the grounding rotating baffle 7, so that the ring network cabinet has a linkage interlocking indication of power-off operation, thereby having a stable five-protection function. The operator must strictly operate in the power-off sequence of the circuit breaker, the isolating switch and the grounding switch to eliminate the electrical safety hazards that may exist in the power-off operation of the ring network cabinet.

[0035] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. The technical personnel of the technical field to which the utility model belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A five-protection interlocking ring main unit, comprising a cabinet body, on which a circuit breaker closing button for opening and closing the circuit breaker, an isolation operation hole for operating an isolation switch, and a grounding operation hole for operating a grounding switch are provided, characterized in that: The cabinet is also provided with a circuit breaker closing cam, an isolation rotating baffle, a grounding rotating baffle and an interlocking mechanism; the circuit breaker closing cam is drivingly connected with the opening and closing main shaft of the circuit breaker, the isolation rotating baffle and the grounding rotating baffle can be rotatably installed on the cabinet, the isolation rotating baffle corresponds to the position of the isolation operation hole, and the grounding rotating baffle corresponds to the position of the grounding operation hole; the interlocking mechanism is provided with a circuit breaker linkage end, an isolation operation linkage end and a grounding operation linkage end, the circuit breaker linkage end is linked with the circuit breaker closing cam, the isolation operation linkage end is linked with the isolation rotating baffle, and the grounding operation linkage end is linked with the grounding rotating baffle.

2. The five-protection interlocking ring main unit according to claim 1 is characterized in that: The interlocking mechanism includes a first interlocking member, which can be installed on the cabinet body in an upward and downward manner; the upper end of the first interlocking member serves as the circuit breaker linkage end and contacts and cooperates with the convex portion of the circuit breaker closing cam; the lower end of the first interlocking member is located between the isolation operation hole and the grounding operation hole, the lower left portion of the first interlocking member serves as the isolation operation linkage end and contacts and cooperates with the isolation rotating baffle, and the lower right portion of the first interlocking member serves as the grounding operation linkage end and contacts and cooperates with the grounding rotating baffle; the rotation axis of the isolation rotating baffle is located between the isolation operation hole and the lower left portion of the first interlocking member, and the rotation axis of the grounding rotating baffle is located between the grounding operation hole and the lower right portion of the first interlocking member.

3. The five-protection interlocking ring main unit according to claim 2 is characterized in that: The interlocking mechanism also includes a second interlocking member and a third interlocking member. The second interlocking member can be installed on the cabinet body in an upward and downward manner. The upper end of the second interlocking member is linked with the circuit breaker closing button, and the lower part of the second interlocking member is connected to the transmission shaft of the isolating switch. The third interlocking member can be swingably installed on the cabinet body and is located between the isolating rotating baffle and the grounding rotating baffle.

4. The five-protection interlocking ring main unit according to claim 3 is characterized in that: The third interlocking member comprises a position indicator and a toggle rod. The position indicator is swingably mounted on the cabinet. The toggle rod is arranged on the rear side of the position indicator and between the isolation rotating baffle and the grounding rotating baffle.

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