Front upper and lower door interlocking device for CGIS

Abstract

The utility model discloses a front upper and lower door interlocking device for a CGIS. The front upper and lower door interlocking device comprises a mounting frame, an interlocking guide rod, an interlocking connecting rod, an interlocking connecting rod and a stop assembly, the mounting rack is mounted in a CGIS equipment low-voltage control room, and the interlocking guide rod is movably mounted on the mounting rack and moves up and down along the mounting rack; the middle section of the interlocking guide rod is movably connected with one end of an interlocking connecting rod, the other end of the interlocking connecting rod is fixed with one end of an interlocking connecting rod, and the other end of the interlocking connecting rod is fixed with an interlocking rod on the three-position switch; the stop assembly comprises a first stop piece and a second stop piece, the second stop piece is installed on the cable chamber door, and a limiting hole is formed in the second stop piece; the first blocking piece is movably installed on a door frame of the cable chamber, and the first blocking piece is connected with an elastic piece which is used for clamping the first blocking piece in a limiting groove of the interlocking guide rod. The cable chamber door is provided with an ejector pin abutting against the first separation blade. The utility model has the advantages of simple structure, simple and reliable operation and the like.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of gas metal-enclosed switchgear, specifically to a front and rear door interlocking device for CGIS. Background Technology

[0002] During the use of switchgear, serious accidents can occur due to improper operation or use. To address this, the power sector has compiled statistics on the five most common types of misoperation and stipulated that switchgear must be equipped with reliable interlocking and locking devices to ensure the correctness of operating procedures and prevent misoperation. Therefore, without a safe and reliable mechanical five-proof interlocking device, the safety of equipment use cannot be guaranteed.

[0003] Gas-enclosed metal switchgear (CGIS) seals critical and important primary components within gas-filled chambers, preventing the impact of external environmental factors (condensation, dust, chemicals, etc.). Furthermore, gas insulation facilitates miniaturization. Therefore, the market size of CGIS equipment is expected to grow at an astonishing rate year after year. Figure 1 This is a compact CGIS device using nitrogen as the insulating gas. Its upper front compartment is the low-voltage control room, and its lower front compartment is the cable room. To ensure personnel safety during operation, a reliable mechanical interlock is required between the low-voltage control room and the cable room. This interlock ensures that the cable room door can only be opened when the three-position switch is in the grounded position and the circuit breaker is in the closed position, and that the grounding switch can only be opened or closed after the cable room door is closed. Currently, there are very few mechanical five-proof interlock solutions on the market that meet these functions for compact CGIS devices, and their structures are often quite complex. Complex structures can lead to system-wide problems due to errors in one component, increasing the difficulty of troubleshooting. Furthermore, they reduce operability when transferred to other CGIS devices, lacking versatility and universality. Therefore, the requirements for mechanical five-proof interlock devices are generally simple structure, but accurate and reliable transmission. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model provides a CGIS front and rear door interlocking device that is simple in structure, easy to install, and simple and reliable to operate.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0006] A front and rear door interlocking device for CGIS includes a mounting frame, an interlocking guide rod, an interlocking connecting rod, an interlocking connecting rod, and a stop assembly. The mounting frame is installed in the low-voltage control room of the CGIS equipment. The interlocking guide rod is movably mounted on the mounting frame and moves along the vertical direction of the mounting frame. The middle section of the interlocking guide rod is movably connected to one end of the interlocking connecting rod, the other end of the interlocking connecting rod is fixed to one end of the interlocking connecting rod, and the other end of the interlocking connecting rod is fixed to the interlocking rod on a three-position switch.

[0007] The stop assembly includes a first stop plate and a second stop plate. The second stop plate is installed on the cable compartment door and has a limiting hole. The first stop plate is movably installed on the door frame of the cable compartment and is connected to an elastic element for locking the first stop plate in the limiting groove of the interlocking guide rod. The cable compartment door is provided with a pin that abuts against the first stop plate.

[0008] As a further improvement to the above technical solution:

[0009] The mounting bracket is provided with a sliding groove, and a pin is provided in the sliding groove. The pin is connected to the interlocking guide rod.

[0010] The pin is threadedly connected to the interlocking guide rod.

[0011] The ejector pin is installed on the cable compartment door via an interference fit.

[0012] The middle section of the interlocking guide rod is connected to one end of the interlocking connecting rod by a pin, and the other end of the interlocking connecting rod is fixed to one end of the interlocking connecting rod by a stud.

[0013] The other end of the interlocking connecting rod is connected to the interlocking rod on the three-position switch via a stud.

[0014] The elastic element is a compression spring.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] This utility model, through the above-described mechanical five-way interlocking structure system, enables the following: When the circuit breaker is closed, the three-position switch cannot be operated; when the three-position switch is operated to the grounding position and the circuit breaker is in the closed position, the cable compartment door can be opened; when the three-position switch is not in the grounding position, the circuit breaker is not allowed to open; only after the cable compartment door is closed can the grounding switch be operated. This mechanical interlocking structure is simple, easy to install, simple and reliable to operate, and accurate in transmission, thus improving the safety of CGIS equipment during use. Attached Figure Description

[0017] Figure 1 This is a diagram showing the overall structure of the existing CGIS equipment.

[0018] Figure 2 This is a front view of the interlocking device of this utility model in a specific application.

[0019] Figure 3 This is a side view of the interlocking device of this utility model in a specific application.

[0020] Figure 4 This is a perspective view of the interlocking device of this utility model in a specific application.

[0021] Figure 5 This is one of the three-dimensional structural diagrams of the interlocking device of this utility model in an embodiment.

[0022] Figure 6 This is the second perspective structural diagram of the interlocking device of this utility model in an embodiment.

[0023] Figure 7 This is a front view structural diagram of the interlocking device of this utility model in a specific application.

[0024] Figure 8 This is a three-dimensional structural diagram of the interlocking device of this utility model in a specific application.

[0025] Figure 9 This is a diagram illustrating an embodiment of the top rod of this utility model in a specific application.

[0026] Legend: 1. Mounting bracket; 2. Interlocking guide rod; 201. Pin; 3. Interlocking connecting rod; 4. Interlocking connecting rod; 5. Stop assembly; 501. First stop plate; 502. Second stop plate; 503. Spring; 6. Ejector pin; 7. Interlocking rod. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 2-3 The diagram shown is an overall installation structure diagram of the CGIS front and rear door interlocking device of this utility model.

[0029] like Figure 4As shown, the CGIS front and rear door interlocking device of this utility model embodiment includes a mounting frame 1, an interlocking guide rod 2, an interlocking connecting rod 3, an interlocking connecting rod 4, and a stop assembly 5. The mounting frame 1 is installed in the low-voltage control room of the CGIS equipment. The interlocking guide rod 2 is movably installed on the mounting frame 1 and moves along the vertical direction of the mounting frame 1. The middle section of the interlocking guide rod 2 is movably connected to one end of the interlocking connecting rod 3, and the other end of the interlocking connecting rod 3 is fixed to one end of the interlocking connecting rod 4. The other end of the interlocking connecting rod 4 is fixed to the interlocking rod 7 on the three-position switch. The stop assembly includes a first baffle 501 and a second baffle 502. The second baffle 502 is installed on the cable compartment door and has a limiting hole. The first baffle 501 is movably installed on the door frame of the cable compartment and is connected to an elastic element for locking the first baffle 501 in the limiting groove of the interlocking guide rod 2. The cable compartment door is provided with a pin 6 for compressing the elastic element.

[0030] like Figures 5-6 As shown, the mounting bracket 1 is assembled from multiple mounting plates by welding into a single unit, which is then installed on the front door of the CGIS equipment. The interlocking pin 201 is threaded onto the interlocking guide rod 2. The middle section of the interlocking guide rod 2 is connected to one end of the interlocking connecting rod 3 by a pin. The other end of the interlocking connecting rod 3 is fixed to one end of the interlocking connecting rod 4 by a stud, thus restricting the rotational freedom of the interlocking connecting rod 4. The other end of the interlocking connecting rod 4 is connected to the interlocking rod 7 on the three-position switch by a stud, connecting the output of the three-position switch to the external interlocking device.

[0031] like Figures 7-9 As shown, the first baffle 501 is installed on the cable compartment door via the lower door mounting plate. Similarly, the second baffle 502 is also installed on the top component plate of the lower frame of the cable compartment door. The interlocking pin 6 is installed on the cable compartment door via an interference fit. One side of the first baffle 501 is fixed by bolts and nuts, without restricting its rotational freedom. The other side is fixed by a compression spring 503 and a pin through a hole. In this way, the first baffle 501 can move and has a certain rebound capability with the help of the compression spring 503, which cooperates with the slot (limiting slot) on the interlocking guide rod 2.

[0032] The specific working process is as follows: The three-position switch drives the interlocking rod 7 to rotate. The interlocking rod 7 is connected to the interlocking connecting rod 4. Through the interlocking connecting rod 4, the interlocking guide rod 2 moves downward and inserts into the limiting hole of the second stop plate 502. Since the second stop plate 502 is installed on the lower door (cable compartment door), the cable compartment door cannot be opened at this time. At this time, the tripping stop plate will block the tripping button, and the tripping button cannot be pressed. Tripping is not allowed at this time. Only when the grounding switch is closed, driving the interlocking rod 7 and the interlocking connecting rod 4 to rotate, causing the interlocking guide rod 2 to move upward and lift up above the second stop plate 502, can the lower door be opened, and the tripping button can be pressed at this time.

[0033] When the cable compartment door is opened, the interlocking pin 6 mounted on the lower door moves away from its position against the first baffle. As the interlocking guide rod 2 moves upward, the first baffle is subjected to the force of the compression spring 503. When it reaches the position of the limiting groove in the interlocking guide rod 2, the first baffle will be locked into the limiting groove in the interlocking guide rod 2 under the force of the spring 503, preventing the interlocking guide rod 2 from moving up and down. At this time, the interlocking connecting rod 4 also cannot rotate. Only when the lower door of the cable compartment is closed, and the interlocking pin 6 presses against the compression spring 503 of the first baffle, creating space for the interlocking guide rod 2 to move, can the interlocking guide rod 2 continue to move, and the three-position switch can be operated.

[0034] This utility model, through the above-described mechanical five-way interlocking structure system, enables the following: When the circuit breaker is closed, the three-position switch cannot be operated; when the three-position switch is operated to the grounding position and the circuit breaker is in the closed position, the cable compartment door can be opened; when the three-position switch is not in the grounding position, the circuit breaker is not allowed to open; only after the cable compartment door is closed can the grounding switch be operated. This mechanical interlocking structure is simple, easy to install, simple and reliable to operate, and accurate in transmission, thus improving the safety of CGIS equipment during use.

[0035] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A front and rear door interlocking device for CGIS, characterized in that, It includes a mounting frame (1), an interlocking guide rod (2), an interlocking connecting rod (3), an interlocking connecting rod (4), and a stop assembly (5); the mounting frame (1) is installed in the low-voltage control room of the CGIS equipment, the interlocking guide rod (2) is movably installed on the mounting frame (1) and moves up and down along the mounting frame (1); the middle section of the interlocking guide rod (2) is movably connected to one end of the interlocking connecting rod (3), the other end of the interlocking connecting rod (3) is fixed to one end of the interlocking connecting rod (4), and the other end of the interlocking connecting rod (4) is fixed to the interlocking rod (7) on the three-position switch; The stop assembly (5) includes a first stop plate (501) and a second stop plate (502). The second stop plate (502) is installed on the cable compartment door and has a limiting hole. The first stop plate (501) is movably installed on the door frame of the cable compartment and is connected to an elastic element for locking the first stop plate (501) in the limiting groove of the interlocking guide rod (2). The cable compartment door is provided with a pin (6) that abuts against the first stop plate (501).

2. The CGIS front and rear door interlocking device according to claim 1, characterized in that, The mounting bracket (1) is provided with a sliding groove, and a pin (201) is provided in the sliding groove. The pin (201) is connected to the interlocking guide rod (2).

3. The CGIS front and rear door interlocking device according to claim 2, characterized in that, The pin (201) is threadedly connected to the interlocking guide rod (2).

4. The CGIS front and rear door interlocking device according to claim 1, 2, or 3, characterized in that, The ejector pin (6) is installed on the cable compartment door by interference fit.

5. The CGIS front upper and lower door interlocking device according to claim 1, 2, or 3, characterized in that, The middle section of the interlocking guide rod (2) is connected to one end of the interlocking connecting rod (3) by a pin, and the other end of the interlocking connecting rod (3) is fixed to one end of the interlocking connecting rod (4) by a stud.

6. The CGIS front and rear door interlocking device according to claim 5, characterized in that, The other end of the interlocking connecting rod (4) is connected to the interlocking rod (7) on the three-position switch by a stud.

7. The CGIS front upper and lower door interlocking device according to claim 1, 2, or 3, characterized in that, The elastic element is a compression spring (503).

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