Pressure relief mechanism for ring main unit

Abstract

The utility model discloses a pressure relief mechanism for a ring main unit, which is mounted on a cabinet body, a first pressure relief hole is formed in the cabinet body, a second pressure relief hole communicated with the first pressure relief hole is formed in the middle of a fixed seat, and a groove is formed in the free end of the fixed seat; the opening and closing plates are arranged in a split mode and used for opening and closing the second pressure relief holes, and the opening and closing plates are arranged in the radial direction of the fixing base in a sliding mode; the sliding rod is fixedly connected to the opening and closing plate. The fluted disc is rotationally installed on the groove, a second sliding groove in sliding fit with the sliding rod is formed in the fluted disc, the second sliding groove is an arc-shaped groove which rotates in the axial direction of the fluted disc and extends outwards, and a third pressure relief hole communicated with the second pressure relief hole is formed in the fluted disc. According to the utility model, through mechanical linkage and a control system, effective management and timely adjustment of the internal air pressure of the ring main unit are realized, and safe operation of equipment is ensured.

Description

Technical Field

[0001] This utility model relates to the field of ring main unit technology, and in particular to a pressure relief mechanism for ring main units. Background Technology

[0002] A ring main unit is a facility specifically designed for storing, protecting, and managing telecommunications equipment. It is suitable for indoor or outdoor environments and features waterproof, dustproof, and corrosion-resistant properties to ensure stable operation of the internal equipment. To enhance insulation, the inside of a ring main unit is usually filled with a highly efficient insulating gas.

[0003] However, due to the sealed design of the ring main unit, excessive pressure may be generated inside the ring main unit during the operation of electrical equipment and under the influence of external environmental factors. If this high pressure is not relieved in time, it may lead to equipment damage or even an explosion accident. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure relief mechanism for ring main units in order to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pressure relief mechanism for a ring main unit is installed on the cabinet body, and a first pressure relief hole is provided on the cabinet body, comprising:

[0007] The fixed base has a second pressure relief hole in the middle that communicates with the first pressure relief hole, and a groove is provided at the free end of the fixed base;

[0008] Two sets of hinged plates are arranged in a split configuration to open and close the second pressure relief hole. The hinged plates are slidably arranged along the radial direction of the fixed base.

[0009] The sliding rod is fixedly connected to the opening and closing plate;

[0010] The gear disc is rotatably mounted on the groove. A second sliding groove is provided on the gear disc to slide with the slide rod. The second sliding groove is an arc-shaped groove that extends outward along the axial direction of the gear disc. A third pressure relief hole is provided on the gear disc to communicate with the second pressure relief hole.

[0011] As a further description of the above technical solution:

[0012] Also includes:

[0013] The servo motor is fixedly mounted on a mounting bracket.

[0014] The gear is fixedly mounted on the output shaft of the servo motor, and the gear meshes with the gear plate.

[0015] As a further description of the above technical solution:

[0016] Also includes:

[0017] The bracket is fixedly connected to the second pressure relief hole;

[0018] The air pressure sensor is fixedly mounted on the bracket and extends into the cabinet through the first pressure relief hole;

[0019] The controller is fixedly mounted on a mounting base and is electrically connected to the pressure sensor and servo motor.

[0020] As a further description of the above technical solution:

[0021] Also includes:

[0022] The slot penetrates the fixed base radially. The opening and closing plate slides into the slot, and the contact surface between the opening and closing plate and the slot is a smooth surface.

[0023] As a further description of the above technical solution:

[0024] Also includes:

[0025] The first slide groove connects the slot and the groove along the axial direction of the fixed seat, and the slide rod passes through the first slide groove and the second slide groove.

[0026] As a further description of the above technical solution:

[0027] Also includes:

[0028] Bolts are used to connect the mounting base and the cabinet.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0030] 1. In this utility model, the air pressure sensor is responsible for monitoring the air pressure inside the cabinet in real time. When the air pressure inside the cabinet exceeds the set safety threshold, the air pressure sensor will transmit this signal to the controller. The controller is electrically connected to the air pressure sensor and the servo motor. When the controller receives the high-pressure signal from the air pressure sensor, it starts the servo motor. The servo motor drives the gear to start rotating, and the gear drives the gear plate to rotate. The rotation of the gear plate drives the slide rod to move along the first slide groove and the second slide groove, pushing the opening and closing plate to slide in the slot. The sliding action of the opening and closing plate opens or closes the connecting path composed of the first pressure relief hole, the second pressure relief hole and the third pressure relief hole. The excessive pressure inside the cabinet can be released through this path, thereby reducing the air pressure inside the cabinet and avoiding damage caused by overpressure.

[0031] 2. In this utility model, the air pressure sensor continuously monitors the air pressure inside the cabinet and feeds back the real-time data to the controller. The controller calculates the appropriate opening area of ​​the second pressure relief hole according to the preset safe air pressure range, and then controls the servo motor to adjust the position of the opening and closing plate. By precisely controlling the opening size of the second pressure relief hole, it can more effectively deal with various degrees of overpressure, avoid the risks caused by excessive or insufficient pressure relief, and greatly improve the safety of equipment operation. Attached Figure Description

[0032] Figure 1 A three-dimensional structural schematic diagram of a pressure relief mechanism for a ring main unit according to an embodiment of the present utility model is shown;

[0033] Figure 2 An exploded structural diagram of a pressure relief mechanism for a ring main unit according to an embodiment of the present invention is shown.

[0034] Figure 3 A front view schematic diagram of a pressure relief mechanism for a ring main unit according to an embodiment of the present utility model is shown;

[0035] Figure 4 It shows Figure 3 Schematic sectional view along the AA direction.

[0036] Legend:

[0037] 1. Cabinet; 101. First pressure relief hole; 2. Fixing base; 201. Second pressure relief hole; 202. Slot; 203. First slide rail; 204. Groove; 3. Bolt; 4. Gear plate; 401. Third pressure relief hole; 402. Second slide rail; 5. Servo motor; 6. Gear; 7. Controller; 8. Slide rod; 9. Air pressure sensor; 10. Opening and closing plate; 11. Bracket. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0039] Example 1:

[0040] Please see Figure 1-4This utility model provides a technical solution: a pressure relief mechanism for a ring main unit, installed on a cabinet 1. The cabinet 1 has a first pressure relief hole 101. A fixing seat 2 is fixed to the cabinet 1 by several bolts 3. A second pressure relief hole 201 communicating with the first pressure relief hole 101 is opened in the middle of the fixing seat 2. A third pressure relief hole 401 communicating with the second pressure relief hole 201 is opened on the gear plate 4. A slot 202 is opened in the radial direction of the fixing seat 2. An opening plate 10 slides in the slot 202. The contact surface between the opening plate 10 and the slot 202 is a smooth surface. The sliding action opens or closes the communication path formed by the first pressure relief hole 101, the second pressure relief hole 201, and the third pressure relief hole 401. Excessive pressure inside the cabinet 1 can be released through this path, thereby reducing the air pressure inside the cabinet 1 and preventing damage caused by overpressure. The free end of the fixed base 2 has a groove 204, and the gear plate 4 is rotatably mounted on the groove 204. The gear plate 4 has a second sliding groove 402 that slides with the slide rod 8. The second sliding groove 402 is an arc-shaped groove that extends outward along the axial direction of the gear plate 4. A communication slot 2 is provided along the axial direction of the fixed base 2. 02 and the first slide groove 203 of the groove 204, a slide rod 8 is fixedly connected to the opening and closing plate 10, the slide rod 8 passes through the first slide groove 203 and the second slide groove 402, the gear plate 4 rotates, driving the slide rod 8 to move along the first slide groove 203 and the second slide groove 402, pushing the opening and closing plate 10 to slide in the slot 202; the servo motor 5 is fixedly installed on the fixed base 2, the gear 6 is fixedly sleeved on the output shaft of the servo motor 5, the gear 6 is meshed with the gear plate 4, the bracket 11 is fixedly connected to the second pressure relief hole 201, the air pressure sensor 9 is fixedly installed on the bracket 11, the air pressure sensor The pressure sensor 9 extends into the cabinet 1 through the first pressure relief hole 101; the pressure sensor 9 is responsible for monitoring the air pressure inside the cabinet 1 in real time. The controller 7 is fixedly installed on the mounting base 2. When the air pressure inside the cabinet 1 exceeds the set safety threshold, the pressure sensor 9 will transmit this signal to the controller 7. The controller 7 is electrically connected to the pressure sensor 9 and the servo motor 5. When the controller 7 receives the high-pressure signal from the pressure sensor 9, it starts the servo motor 5. The servo motor 5, as a power source, drives the gear 6, which is fixedly connected to its output shaft, to start rotating. The gear 6 drives the gear disk 4 to rotate.

[0041] When the air pressure inside cabinet 1 returns to normal, the air pressure sensor 9 sends a signal to the controller 7 again. The controller 7 controls the servo motor 5 to reverse or stop, causing the gear plate 4 to rotate, which drives the opening and closing plate 10 to re-close the connecting path formed by the pressure relief holes, completing the entire pressure relief process and restoring the system to its initial state.

[0042] This device, through mechanical linkage and control system, achieves effective management and timely adjustment of the internal air pressure of the ring main unit, ensuring the safe operation of the equipment.

[0043] Example 2:

[0044] Unlike Embodiment 1, the pressure sensor 9 continuously monitors the air pressure inside the cabinet and feeds back the real-time data to the controller 7. The controller 7 calculates the appropriate opening area of ​​the second pressure relief hole 201 based on a preset safe air pressure range, and then controls the servo motor 5 to adjust the position of the opening and closing plate 10. For example, when a slight overpressure is detected, the second pressure relief hole 201 only needs to be opened slightly; while in the case of severe overpressure, the second pressure relief hole 201 is fully opened to quickly release the pressure. By precisely controlling the opening size of the second pressure relief hole 201, various degrees of overpressure can be dealt with more effectively, avoiding the risks caused by excessive or insufficient pressure relief, and greatly improving the safety of equipment operation.

[0045] Working principle: During use, the air pressure sensor 9 is responsible for monitoring the air pressure inside the cabinet 1 in real time. When the air pressure inside the cabinet 1 exceeds the set safety threshold, the air pressure sensor 9 will transmit this signal to the controller 7. The controller 7 is electrically connected to the air pressure sensor 9 and the servo motor 5. When the controller 7 receives the high pressure signal from the air pressure sensor 9, it starts the servo motor 5. The servo motor 5 drives the gear 6 to start rotating. The gear 6 drives the gear plate 4 to rotate. The rotation of the gear plate 4 drives the slide rod 8 to move along the first slide groove 203 and the second slide groove 402, pushing the opening and closing plate 10 to slide in the slot 202. The sliding action of the opening and closing plate 10 opens or closes the connecting path composed of the first pressure relief hole 101, the second pressure relief hole 201 and the third pressure relief hole 401. The excessive pressure inside the cabinet 1 can be released through this path, thereby reducing the air pressure inside the cabinet 1 and avoiding damage caused by overpressure.

[0046] When the air pressure inside cabinet 1 returns to normal, the air pressure sensor 9 sends a signal to the controller 7 again. The controller 7 controls the servo motor 5 to reverse or stop, causing the gear plate 4 to rotate, which drives the opening and closing plate 10 to re-close the connecting path formed by the pressure relief holes, completing the entire pressure relief process and restoring the system to its initial state.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure relief mechanism for a ring main unit, installed on a cabinet body (1), wherein a first pressure relief hole (101) is formed in the cabinet body (1), characterized in that, The utility model relates to a cabinet pressure relief device, including: Fixed seat (2), the middle part is equipped with second pressure relief hole (201) with first pressure relief hole (101) intercommunication, the free end of fixed seat (2) is equipped with recess (204); Two groups of open-close board (10) of open type arrangement are used for realizing the opening and closing of second pressure relief hole (201), and open-close board (10) is arranged along the radial direction of fixed seat (2) and slides; Slide rod (8) is fixedly connected on open-close board (10); Gear disc (4) is rotatably installed on recess (204), gear disc (4) is equipped with second sliding slot (402) with slide rod (8) sliding cooperation, and second sliding slot (402) is the arc slot extending outward along the axial rotation of gear disc (4), and gear disc (4) is equipped with third pressure relief hole (401) with second pressure relief hole (201) intercommunication.

2. The pressure relief mechanism for ring main unit according to claim 1, characterized in that, Further including: Servo motor (5) is fixedly installed on fixed seat (2); Gear (6) is fixedly sleeved on the output shaft of servo motor (5), and gear (6) is meshed with gear disc (4).

3. The pressure relief mechanism for ring main unit according to claim 2, characterized in that, Further including: Support (11) is fixedly connected on second pressure relief hole (201); Air pressure sensor (9) is fixedly installed on support (11), and air pressure sensor (9) extends into cabinet body (1) through first pressure relief hole (101); Controller (7) is fixedly installed on fixed seat (2), and controller (7) is electrically connected with air pressure sensor (9) and servo motor (5).

4. The pressure relief mechanism for ring main unit according to claim 3, characterized in that, Further including: Slot (202) penetrates fixed seat (2) along the radial direction of fixed seat (2), and open-close board (10) is slidingly matched with slot (202), and the contact surface of open-close board (10) and slot (202) is smooth surface.

5. The pressure relief mechanism for ring main unit according to claim 4, characterized in that, Further including: First sliding slot (203) is communicated slot (202) and recess (204) along the axial direction of fixed seat (2), and slide rod (8) passes through first sliding slot (203) and second sliding slot (402).

6. The pressure relief mechanism for ring main unit according to claim 5, characterized in that, Further including: Bolt (3) is used for connecting fixed seat (2) and cabinet body (1).

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