Pressure relief device for 10kV environment-friendly gas switch cabinet

Abstract

The utility model discloses a pressure relief device for a 10kV environment-friendly gas switch cabinet, which is characterized by comprising a cabinet body, a pressure relief cavity is arranged on the side wall of the cabinet body, a ventilation assembly is arranged inside the cabinet body, an exhaust assembly is arranged outside the cabinet body, the ventilation assembly and the exhaust assembly are both hinged with the cabinet body, and the pressure relief cavity is arranged in the cabinet body. And an air cylinder is arranged in the ventilation assembly, and the output end of the air cylinder penetrates through the pressure relief cavity to be movably connected with the exhaust assembly. According to the utility model, the air cylinder drives the ball head to move so as to jack up the exhaust plate along the moving direction of the hinge II, so that the pressure relief control of the cabinet body is carried out when arcing occurs in the cabinet body, and the use safety of the cabinet body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief protection of electrical cabinets, in particular to a pressure relief device for a 10kV environmentally friendly gas switch cabinet. Background Art

[0002] Environmentally friendly gas switchgear is a new type of switchgear. Its biggest feature is that it uses environmentally friendly gas as the insulating medium instead of traditional oil or air. This environmentally friendly gas is usually a gas with excellent insulation performance and environmental protection characteristics, such as SF6 or other new insulating gases. The structure of the environmentally friendly gas switchgear is similar to that of the traditional switchgear, but it is filled with this environmentally friendly gas inside, thus achieving higher insulation performance and smaller volume. At the same time, due to the use of environmentally friendly gas, this switchgear also has better environmental performance and lower maintenance costs. Environmentally friendly gas switchgear is widely used in power generation, transmission, distribution and other links in the power system, and can be used to control, protect and monitor circuits. Compared with traditional switchgear, environmentally friendly gas switchgear has higher reliability, longer service life and lower operating costs, so it has been widely used in modern power systems.

[0003] The pressure relief protection of 10kV environmentally friendly gas switchgear is an important safety protection measure. Since the switchgear may encounter internal short circuits and arcing faults during operation, the gas pressure in the cabinet will increase, and may even cause an explosion. In order to prevent this from happening, a pressure relief device needs to be installed inside the switchgear so that the gas in the cabinet can be discharged in time when necessary to protect the safety of equipment and personnel.

[0004] The patent with announcement number CN212435192U discloses a pressure relief device for a 10kV environmentally friendly gas switch cabinet. The patent specifically discloses that "the utility model relates to the technical field of power system switch cabinets, and in particular to a pressure relief device for a 10kV environmentally friendly gas switch cabinet. The 10kV environmentally friendly gas switch cabinet is provided with a pressure relief hole, and the pressure relief hole is covered with a pressure relief cover. A plurality of notches are cut on the pressure relief cover, and the notches can clamp the edge of the pressure relief hole to fix the pressure relief cover." The technical solution realizes "When an arcing accident occurs in the 10kV environmentally friendly gas switch cabinet, the pressure relief cover is popped open to relieve the pressure in the cabinet in time. Prevent the accident from affecting the electrical components in the cabinet. The utility model has good pressure relief effect, simple structure, convenient processing and easy promotion."

[0005] However, the pressure relief control rate of this patent cannot be adjusted freely during actual use, and its pressure relief effect is not good for high-volume arcing phenomenon, so there is room for improvement. Utility Model Content

[0006] The purpose of the utility model is to provide a pressure relief device for a 10kV environmentally friendly gas switch cabinet to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure relief device for a 10kV environmentally friendly gas switch cabinet, characterized in that it includes a cabinet body, a pressure relief chamber is opened at the side wall of the cabinet body, a ventilation component is arranged inside the cabinet body, an exhaust component is arranged outside the cabinet body, the ventilation component and the exhaust component are both hinged to the cabinet body, a cylinder is arranged inside the ventilation component, and the output end of the cylinder passes through the pressure relief chamber and is movably connected to the exhaust component.

[0008] As a further solution of the utility model: a pressure relief device for a 10kV environmentally friendly gas switch cabinet, characterized in that the ventilation component includes a connecting cabinet and a hinge, and the connecting cabinet is hinged to the cabinet body through the hinge.

[0009] As a further solution of the utility model: a pressure relief device for a 10kV environmentally friendly gas switch cabinet, characterized in that the exhaust assembly includes an exhaust plate and a second hinge, and the exhaust plate is hinged to the cabinet body through the second hinge.

[0010] As a further solution of the utility model: a pressure relief device for a 10kV environmentally friendly gas switch cabinet, characterized in that a rotating plate is arranged inside the connecting cabinet, a motor frame is fixedly connected to one side of the connecting cabinet, a servo motor can be fixedly installed on one side of the motor frame, and the output end of the servo motor can pass through the motor frame and the connecting cabinet and be fixedly connected to the rotating shaft of the rotating plate.

[0011] As a further solution of the utility model: a pressure relief device for a 10kV environmentally friendly gas switch cabinet, characterized in that the cylinder is fixedly installed on a side of the rotating plate close to the exhaust component, and a ball head is fixedly installed at the output end of the cylinder.

[0012] As a further solution of the utility model: a pressure relief device for a 10kV environmentally friendly gas switch cabinet, characterized in that a door panel is hinged on one side of the cabinet.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The exhaust plate can be lifted up along the movable direction of the hinge 2 by driving the ball head through the cylinder, so as to control the pressure relief of the cabinet when arcing occurs inside the cabinet, thereby ensuring the safe use of the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a pressure relief device for a 10kV environmentally friendly gas switch cabinet according to the utility model;

[0016] Figure 2 This is a structural schematic diagram of a ventilation component in a pressure relief device for a 10kV environmentally friendly gas switch cabinet according to the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of an exhaust component in a pressure relief device for a 10kV environmentally friendly gas switch cabinet according to the utility model;

[0018] Figure 4 This utility model is a pressure relief device for 10kV environmentally friendly gas switch cabinet Figure 2 The enlarged view of point A in the middle;

[0019] In the figure: 1. cabinet body; 2. door panel; 3. pressure relief chamber; 4. ventilation assembly; 41. connecting cabinet; 42. rotating plate; 43. motor frame; 44. cylinder; 45. hinge; 46. ball head; 5. exhaust assembly; 51. exhaust plate; 52. hinge 2. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following is an explanation of the embodiments of the present utility model based on the overall structure of the present utility model.

[0022] In an embodiment of the utility model, a pressure relief device for a 10kV environmentally friendly gas switch cabinet includes a cabinet body 1, a pressure relief chamber 3 is opened at the side wall of the cabinet body 1, a ventilation component 4 is arranged inside the cabinet body 1, an exhaust component 5 is arranged outside the cabinet body 1, the ventilation component 4 and the exhaust component 5 are both hinged to the cabinet body 1, a cylinder 44 is arranged inside the ventilation component 4, and the output end of the cylinder 44 is movably connected to the exhaust component 5 through the pressure relief chamber 3.

[0023] Among them, arcing refers to the phenomenon that arc discharge occurs at the contact point when current passes through equipment such as circuit breakers or contactors in electrical equipment due to the presence of a certain voltage and current between the contact points. Arcing will produce high temperature and strong energy release, which may cause fire, damage to electrical equipment and personal injury. Arcing usually occurs in the process of opening or closing the circuit. When the circuit is opened, the current gradually decreases, but the electric vacuum between the contact points does not disappear immediately, resulting in the generation of an arc. When the circuit is closed, the current will suddenly increase, causing the voltage between the contact points to increase, thereby triggering an arc. The arcing process releases a large amount of energy and generates high temperature, which can even reach more than several thousand degrees, so it is very dangerous. In addition, the arcing phenomenon may also increase the loss of the pantograph slide and contact wire, and burn equipment such as segmented insulators, electrical connecting wires and wire clamps. For the arcing defects of the contact network, they can be divided into indicators such as arcing rate, maximum arcing time and arcing number according to the type of defect, and can also be divided into segmented insulator arcing, insulation anchor segment joint arcing and conductor hard bending and twisting arcing according to the location of occurrence.

[0024] In order to reduce the occurrence and harm of arcing, some measures can be taken, such as optimizing circuit design, improving the quality of contact points, using appropriate circuit breakers and contactors, and strengthening equipment maintenance and overhaul. At the same time, in actual operation, it is also necessary to pay attention to safety and avoid manual intervention when arcing occurs to avoid personal injury.

[0025] Therefore, please refer to Figure 1 , Figure 2 and Figure 4 The cylinder 44 drives the ball head 46 to move, so that the exhaust plate 51 can be lifted up along the moving direction of the hinge 2 52, so that the pressure relief of the cabinet 1 can be controlled when arcing occurs inside the cabinet 1, thereby ensuring the safety of the cabinet 1.

[0026] As another embodiment of the utility model: the ventilation assembly 4 includes a connection cabinet 41 and a hinge 45 , and the connection cabinet 41 is hinged to the cabinet body 1 through the hinge 45 .

[0027] As another embodiment of the present utility model: the exhaust assembly 5 includes an exhaust plate 51 and a second hinge 52 , and the exhaust plate 51 is hinged to the cabinet 1 through the second hinge 52 .

[0028] As other embodiments of the utility model: a rotating plate 42 is arranged inside the connecting cabinet 41, and a motor frame 43 is fixedly connected to one side of the connecting cabinet 41. A servo motor can be fixedly installed on one side of the motor frame 43, and the output end of the servo motor can pass through the motor frame 43 and the connecting cabinet 41 and be fixedly connected to the rotating shaft of the rotating plate 42.

[0029] As another embodiment of the utility model: the cylinder 44 is fixedly mounted on a side of the rotating plate 42 close to the exhaust assembly 5 , and a ball head 46 is fixedly mounted at the output end of the cylinder 44 .

[0030] As another embodiment of the present invention: a door panel 2 is hinged on one side of the cabinet body 1 .

[0031] The working principle of the utility model is: the cylinder 44 drives the ball head 46 to move so as to lift the exhaust plate 51 along the moving direction of the hinge 2 52, so as to control the pressure relief of the cabinet 1 when arcing occurs inside the cabinet 1, thereby ensuring the safety of the cabinet 1.

[0032] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure relief device for a 10kV environmentally friendly gas switch cabinet, characterized in that: The cabinet (1) comprises a cabinet body (1), a pressure relief chamber (3) is provided at a side wall of the cabinet body (1), a ventilation assembly (4) is provided inside the cabinet body (1), an exhaust assembly (5) is provided outside the cabinet body (1), the ventilation assembly (4) and the exhaust assembly (5) are both hinged to the cabinet body (1), a cylinder (44) is provided inside the ventilation assembly (4), and an output end of the cylinder (44) passes through the pressure relief chamber (3) and is movably connected to the exhaust assembly (5).

2. A pressure relief device for a 10kV environmentally friendly gas switch cabinet according to claim 1, characterized in that: The ventilation assembly (4) comprises a connection cabinet (41) and a hinge (45); the connection cabinet (41) is hingedly connected to the cabinet body (1) via the hinge (45).

3. A pressure relief device for a 10kV environmentally friendly gas switch cabinet according to claim 2, characterized in that: The exhaust assembly (5) comprises an exhaust plate (51) and a second hinge (52); the exhaust plate (51) is hingedly connected to the cabinet (1) via the second hinge (52).

4. A pressure relief device for a 10kV environmentally friendly gas switch cabinet according to claim 3, characterized in that: A rotating plate (42) is arranged inside the connection cabinet (41), and a motor frame (43) is fixedly connected to one side of the connection cabinet (41). A servo motor can be fixedly mounted on one side of the motor frame (43), and an output end of the servo motor can pass through the motor frame (43) and the connection cabinet (41) and then be fixedly connected to a rotating shaft of the rotating plate (42).

5. A pressure relief device for a 10kV environmentally friendly gas switch cabinet according to claim 4, characterized in that: The cylinder (44) is fixedly mounted on a side of the rotating plate (42) close to the exhaust assembly (5), and a ball head (46) is fixedly mounted at the output end of the cylinder (44).

6. A pressure relief device for a 10kV environmentally friendly gas switch cabinet according to claim 5, characterized in that: A door panel (2) is hingedly connected to one side of the cabinet body (1).

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