Top cover pressure relief device with anti-dripping function

Abstract

The utility model relates to a top cover pressure relief device with an anti-dripping function, and belongs to the technical field of high-voltage switch cabinet production. The top cover plate assembly is provided with a miniature bus chamber anti-dripping cover, the miniature bus terminal assembly is arranged below the miniature bus chamber anti-dripping cover in a covering mode, the top cover plate assembly is further provided with a pressure relief device anti-dripping assembly, the pressure relief device anti-dripping assembly comprises a pressure relief device anti-dripping cover, and the pressure relief device anti-dripping cover is detachably arranged on the upper surface of the top cover plate assembly. A circuit breaker chamber ventilation opening, a bus chamber ventilation opening and a cable chamber ventilation opening which are arranged in parallel are formed in the pressure relief device anti-dripping cover; and a circuit breaker chamber anti-dripping cover plate, a bus chamber anti-dripping cover plate and a cable chamber anti-dripping cover plate are respectively arranged on the first air duct, the second air duct and the third air duct in a covering manner. The beneficial effects of the utility model are that the pressure of the switch cabinet can be released, the pressure in the switch cabinet is prevented from being too high, and water drops are prevented from entering the switch cabinet from the ventilation opening to cause safety accidents.

Description

Technical Field

[0001] The utility model relates to a top cover pressure relief device with a water-drip-proof function, belonging to the technical field of high-voltage switch cabinet production. Background Art

[0002] High-voltage switchgear refers to the electrical products used for switching, controlling or protecting in power generation, transmission, distribution, power conversion and consumption of power system; high-voltage switchgear is an electrical product with voltage level of 3.6kV~550kV.

[0003] Some existing DC switch cabinets have ventilation holes on the pressure relief device to solve the problem of poor air permeability of the pressure relief device. For example, the utility model with patent application number 201120458885.1 discloses a high-voltage switch cabinet pressure relief device. It includes a cabinet body, a pressure relief cover is provided above the busbar chamber of the cabinet body, the pressure relief cover is connected to the busbar chamber by metal screws, and a pressure relief hole is provided on the pressure relief cover. The high-voltage switch cabinet pressure relief device can not only ensure the safe operation of the high-voltage switch cabinet equipment, but also ensure the safety of the staff, and at the same time is conducive to the heat dissipation of the high-voltage switch cabinet.

[0004] Although the above patent can realize the heat dissipation function of high-voltage switch cabinet, the current technical considerations are not comprehensive and have the following disadvantages: for switch cabinets used in special occasions such as mines, there is a possibility of water leakage in the top environment of the switch cabinet, and water droplets dripping on the pressure relief device may enter the DC switch cabinet through the ventilation holes, causing safety accidents.

[0005] In order to solve one of the above problems, a top cover pressure relief device with an anti-drip function is urgently needed. Utility Model Content

[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: how to achieve that when water droplets fall from the top cover plate assembly, the circuit breaker chamber anti-drip cover plate, the busbar chamber anti-drip cover plate, and the cable chamber anti-drip cover plate will block the water droplets to prevent water droplets from entering the switch cabinet from the vent and causing safety accidents. For this purpose, a top cover pressure relief device with an anti-drip function is provided.

[0007] The top cover pressure relief device with anti-drip function described in the utility model comprises a top cover plate assembly and a small bus terminal assembly installed on the top cover plate assembly, characterized in that: the small bus terminal assembly cover is arranged below the anti-drip cover of the small bus chamber, the top cover plate assembly is also equipped with a pressure relief device anti-drip assembly, the pressure relief device anti-drip assembly comprises a pressure relief device anti-drip cover, the pressure relief device anti-drip cover is detachably installed on the upper surface of the top cover plate assembly, the pressure relief device anti-drip cover has a circuit breaker chamber vent, a bus chamber vent, and a cable chamber vent arranged in parallel, and also comprises a first air duct extending upward from the circuit breaker chamber vent, a second air duct extending upward from the bus chamber vent, and a third air duct extending upward from the cable chamber vent, and the first air duct, the second air duct and the third air duct are respectively covered with a circuit breaker chamber anti-drip cover plate, a bus chamber anti-drip cover plate, and a cable chamber anti-drip cover plate.

[0008] When an abnormality occurs inside the high-voltage switchgear, the high-temperature and high-pressure gas can open the corresponding circuit breaker chamber drip-proof cover, busbar chamber drip-proof cover, and cable chamber drip-proof cover to a certain angle, relieve the pressure of the switchgear, and prevent the pressure inside the switchgear from being too high. When water droplets fall from the top cover assembly, the circuit breaker chamber drip-proof cover, busbar chamber drip-proof cover, and cable chamber drip-proof cover will block the water droplets, preventing water droplets from entering the switchgear from the vents and causing safety accidents; compared with the existing technology, the switchgear has a higher level of protection and can be used in special occasions such as mines.

[0009] Preferably, the vent of the circuit breaker chamber is a rectangular hole, the first air duct is enclosed by a first side panel, a second side panel, a third side panel, and a fourth side panel, the anti-drip cover of the circuit breaker chamber is a rectangular plate, and its four sides are bent downward to form edge guards A, B, C, and D, respectively. The anti-drip cover of the circuit breaker chamber is located above the vent of the circuit breaker chamber, and the edge guard A is provided with a hinge B hinged to the anti-drip cover of the pressure relief device, and a pressure relief fixed bracket A is fixed on the third side panel, and the upper end of the pressure relief fixed bracket A is bent to form a bearing plate A for supporting the anti-drip cover of the circuit breaker chamber.

[0010] The anti-drip cover of the circuit breaker room can be flipped by hinge B. When an abnormality occurs in the circuit breaker room inside the high-voltage switch cabinet, the high-temperature and high-pressure gas will open the corresponding anti-drip cover of the circuit breaker room to a certain angle, relieve the pressure of the circuit breaker room of the switch cabinet, and prevent the pressure in the switch cabinet from being too high. In addition, the first air duct, the anti-drip cover of the circuit breaker room, and the four sets of edge guards are combined to block water droplets, preventing water droplets from entering the switch cabinet from the vent of the circuit breaker room and causing safety accidents.

[0011] Preferably, the busbar chamber vent is a rectangular hole, the second air duct is enclosed by the fifth side panel, the sixth side panel, the seventh side panel, and the eighth side panel, the busbar chamber anti-drip cover is a rectangular plate, and its four sides are bent downward to form edge guards E, F, G, and H, respectively. The busbar chamber anti-drip cover is located above the busbar chamber vent, and the edge guard E is provided with a hinge C hinged to the anti-drip cover of the pressure relief device. A pressure relief fixed bracket B is fixed on the seventh side panel, and the upper end of the pressure relief fixed bracket B is bent to form a bearing plate B for supporting the busbar chamber anti-drip cover.

[0012] The anti-drip cover of the busbar room can be flipped by hinge C. When an abnormality occurs in the busbar room inside the high-voltage switch cabinet, the high-temperature and high-pressure gas will open the corresponding anti-drip cover of the busbar room to a certain angle, relieve the pressure of the busbar room of the switch cabinet, and prevent the pressure in the switch cabinet from being too high. In addition, the second air duct, the anti-drip cover of the busbar room, and the four sets of edge guards are combined to block water droplets, preventing water droplets from entering the switch cabinet from the busbar room vents and causing safety accidents.

[0013] Preferably, the cable room vent is a rectangular hole, the third air duct is formed by enclosing the ninth side panel, the tenth side panel, the eleventh side panel and the twelfth side panel, the cable room drip-proof cover is a rectangular plate, which is bent downward on all sides to form edge guards J, K, M and N, respectively, the cable room drip-proof cover is located above the cable room vent, the edge guard J is provided with a hinge D hinged to the drip-proof cover of the pressure relief device, a pressure relief fixed bracket C is fixed on the eleventh side panel, and the upper end of the pressure relief fixed bracket C is bent to form a bearing plate C for supporting the cable room drip-proof cover.

[0014] The anti-drip cover of the cable room can be flipped by hinge D. When an abnormality occurs in the cable room inside the high-voltage switch cabinet, the high-temperature and high-pressure gas will open the corresponding anti-drip cover of the cable room to a certain angle, relieve the pressure in the cable room of the switch cabinet, and prevent the pressure in the switch cabinet from being too high. In addition, the third air duct, the anti-drip cover of the cable room, and the four sets of edge guards are combined to block water droplets, preventing water droplets from entering the switch cabinet from the vents of the cable room and causing safety accidents.

[0015] Preferably, the anti-drip cover of the pressure relief device is fixed to the top cover assembly by four sets of lifting bolts, so as to realize the detachable connection of the anti-drip cover of the pressure relief device and utilize the lifting of the cabinet.

[0016] Preferably, the small bus terminal assembly includes a small bus terminal, the small bus terminal is installed on the upper surface of the top cover plate assembly through a small bus terminal bracket, the small bus room anti-drip cover is above the small bus terminal, the top cover plate assembly also has a brow and a small bus room support frame, the small bus room support frame is installed with a hinge A hinged to the small bus room anti-drip cover, and the upper end of the brow is bent to form a bearing plate D for the small bus room anti-drip cover. The brow, the small bus room support frame and the small bus room anti-drip cover work together to block water droplets and prevent water droplets from affecting the small bus terminal assembly.

[0017] Preferably, the top cover plate assembly comprises a pressure relief top cover, a lighting lamp is mounted on the lower surface of the pressure relief top cover, and a travel switch is mounted via a travel switch bracket.

[0018] Preferably, the height of the pressure relief fixed shelf A is higher than the height of the first air duct.

[0019] Preferably, the first side, the second side and the third side of the drip-proof cover of the pressure relief device have water-retaining flanges.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The top cover pressure relief device with anti-drip function described in the utility model can release the pressure of the switch cabinet to prevent the pressure in the switch cabinet from being too high by using high-temperature and high-pressure gas to open the corresponding anti-drip cover plates of the circuit breaker chamber, the anti-drip cover plates of the busbar chamber and the anti-drip cover plates of the cable chamber to a certain angle when an abnormality occurs inside the high-voltage switch cabinet.

[0022] The top cover pressure relief device with anti-drip function described in the utility model can block the water drops when water drops fall from the top cover plate assembly, thereby preventing water drops from entering the switch cabinet from the vent and causing safety accidents. Compared with the prior art, the protection level of the switch cabinet is higher and can be applied to special occasions such as mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the utility model without the anti-drip component of the pressure relief device;

[0026] Figure 3 The structure of the drip shield for the small busbar room Figure 1 ;

[0027] Figure 4 The structure of the drip shield for the small busbar room Figure 2 ;

[0028] Figure 5 This is a structural diagram of the anti-drip assembly of the pressure relief device;

[0029] Figure 6 for Figure 5 CC cross-section diagram in;

[0030] Figure 7 This is the structural diagram of the drip cover of the pressure relief device;

[0031] Figure 8 for Figure 7 AA cross section in;

[0032] Fig. 9 for Figure 7 BB cross-section diagram in;

[0033] In the figure: 1, top cover assembly 1-1, eyebrow 1-2, small busbar terminal bracket 1-3, small busbar terminal 1-4, travel switch 1-5, travel switch bracket 1-6, lighting lamp 1-7, small busbar room support frame 1-8, hinge A 1-9, lifting bolt 1-10, pressure relief top cover 2, small busbar room drip cover 3, pressure relief device drip cover assembly 3-1, pressure relief device drip cover 3-2, hinge B 3-3, circuit breaker room drip cover 3-4, busbar room drip cover 3-5, cable room drip cover 3-6, pressure relief fixed frame A. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings: The utility model is further illustrated below through specific embodiments, but is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the invention should be included in the protection scope of the utility model.

[0035] Embodiment 1, as Figure 1-2As shown, the top cover pressure relief device with anti-drip function comprises a top cover plate assembly 1 with a pressure relief hole and a small busbar terminal assembly installed on the top cover plate assembly 1, the small busbar terminal assembly cover is arranged below the small busbar chamber anti-drip cover 2, and the top cover plate assembly 1 is also equipped with a pressure relief device anti-drip assembly 3, the pressure relief device anti-drip assembly 3 comprises a pressure relief device anti-drip cover 3-1, and the pressure relief device anti-drip cover 3-1 is detachably installed on the upper surface of the top cover plate assembly 1, The drip-proof cover 3-1 of the pressure relief device has circuit breaker chamber vents, busbar chamber vents, and cable chamber vents arranged in parallel, and also includes a first air duct extending upward from the circuit breaker chamber vents, a second air duct extending upward from the busbar chamber vents, and a third air duct extending upward from the cable chamber vents. The first air duct, the second air duct, and the third air duct are respectively covered with a circuit breaker chamber drip-proof cover plate 3-3, a busbar chamber drip-proof cover plate 3-4, and a cable chamber drip-proof cover plate 3-5.

[0036] When an abnormality occurs inside the high-voltage switch cabinet, the high-temperature and high-pressure gas can open the corresponding circuit breaker chamber anti-drip cover plate 3-3, busbar chamber anti-drip cover plate 3-4, and cable chamber anti-drip cover plate 3-5 to a certain angle, relieve the pressure of the switch cabinet, and prevent the pressure inside the switch cabinet from being too high. When water droplets fall from the top cover assembly 1, the circuit breaker chamber anti-drip cover plate 3-3, busbar chamber anti-drip cover plate 3-4, and cable chamber anti-drip cover plate 3-5 will block the water droplets to prevent water droplets from entering the switch cabinet from the vents and causing safety accidents; compared with the existing technology, the switch cabinet has a higher protection level and can be used in special occasions such as mines.

[0037] Embodiment 2, as Figure 1-2 As shown, the top cover pressure relief device with anti-drip function includes a top cover plate assembly 1 and a small busbar terminal assembly installed on the top cover plate assembly 1, the small busbar terminal assembly cover is arranged below the small busbar chamber anti-drip cover 2, and the top cover plate assembly 1 is also equipped with a pressure relief device anti-drip assembly 3, the pressure relief device anti-drip assembly 3 includes a pressure relief device anti-drip cover 3-1, and the pressure relief device anti-drip cover 3-1 is detachably installed on the upper surface of the top cover plate assembly 1, and the pressure relief device anti-drip cover 3-1 has a circuit breaker chamber vent, a busbar chamber vent, and a cable chamber vent arranged in parallel, and also includes a first air duct extending upward from the circuit breaker chamber vent, a second air duct extending upward from the busbar chamber vent, and a third air duct extending upward from the cable chamber vent, and the first air duct, the second air duct and the third air duct are respectively covered with a circuit breaker chamber anti-drip cover 3-3, a busbar chamber anti-drip cover 3-4, and a cable chamber anti-drip cover 3-5.

[0038] Furthermore, if Figure 5-9As shown, the vent of the circuit breaker chamber is a rectangular hole, the first air duct is formed by enclosing a first side panel, a second side panel, a third side panel, and a fourth side panel, the anti-drip cover plate 3-3 of the circuit breaker chamber is a rectangular plate, and its four sides are bent downward to form edge guards A, edge guards B, edge guards C, and edge guards D, respectively. The anti-drip cover plate 3-3 of the circuit breaker chamber is located above the vent of the circuit breaker chamber, and the edge guard A is provided with a hinge B3-2 hinged to the anti-drip cover 3-1 of the pressure relief device, and a pressure relief fixed bracket A3-6 is fixed on the third side panel, and the upper end of the pressure relief fixed bracket A3-6 is bent to form a bearing plate A for supporting the anti-drip cover plate 3-3 of the circuit breaker chamber.

[0039] The anti-drip cover plate 3-3 of the circuit breaker chamber can be turned over by the hinge B3-2. When an abnormality occurs in the circuit breaker chamber inside the high-voltage switch cabinet, the high-temperature and high-pressure gas will open the corresponding anti-drip cover plate 3-3 of the circuit breaker chamber to a certain angle, and the circuit breaker chamber of the switch cabinet will be depressurized to prevent the pressure inside the switch cabinet from being too high. In addition, the first air duct, the anti-drip cover plate 3-3 of the circuit breaker chamber, and the four sets of edge guards are combined to block water droplets, preventing water droplets from entering the switch cabinet from the vent of the circuit breaker chamber and causing safety accidents.

[0040] Furthermore, the busbar chamber vent is a rectangular hole, the second air duct is formed by the fifth side panel, the sixth side panel, the seventh side panel, and the eighth side panel, the busbar chamber anti-drip cover 3-4 is a rectangular plate, and its four sides are bent downward to form edge guards E, F, G, and H, respectively. The busbar chamber anti-drip cover 3-4 is located above the busbar chamber vent, and the edge guard E is provided with a hinge C hinged to the pressure relief device anti-drip cover 3-1. A pressure relief fixed bracket B is fixed on the seventh side panel, and the upper end of the pressure relief fixed bracket B is bent to form a bearing plate B for supporting the busbar chamber anti-drip cover 3-4.

[0041] The anti-drip cover plate 3-4 of the busbar room can be turned over by hinge C. When an abnormality occurs in the busbar room inside the high-voltage switch cabinet, the high-temperature and high-pressure gas will open the corresponding anti-drip cover plate 3-4 of the busbar room to a certain angle, and the busbar room of the switch cabinet will be depressurized to prevent the pressure inside the switch cabinet from being too high. In addition, the second air duct, the anti-drip cover plate 3-4 of the busbar room, and the four sets of edge guards are combined to block water droplets, preventing water droplets from entering the switch cabinet from the busbar room vents and causing safety accidents.

[0042] Furthermore, the cable room vent is a rectangular hole, the third air duct is formed by the ninth side panel, the tenth side panel, the eleventh side panel, and the twelfth side panel, the cable room anti-drip cover 3-5 is a rectangular plate, and its four sides are bent downward to form edge guards J, edge guards K, edge guards M, and edge guards N, respectively. The cable room anti-drip cover 3-5 is located above the cable room vent, and the edge guard J is provided with a hinge D hinged to the pressure relief device anti-drip cover 3-1. A pressure relief fixed bracket C is fixed on the eleventh side panel, and the upper end of the pressure relief fixed bracket C is bent to form a bearing plate C for supporting the cable room anti-drip cover 3-5.

[0043] The cable room anti-drip cover plate 3-5 can be flipped by hinge D. When an abnormality occurs in the cable room inside the high-voltage switch cabinet, the high-temperature and high-pressure gas will open the corresponding cable room anti-drip cover plate 3-5 to a certain angle, relieve the pressure in the cable room of the switch cabinet, and prevent the pressure in the switch cabinet from being too high. In addition, the third air duct, the cable room anti-drip cover plate 3-5, and the four sets of edge guards are combined to block water droplets, preventing water droplets from entering the switch cabinet from the cable room vents and causing safety accidents.

[0044] Furthermore, the anti-drip cover 3-1 of the pressure relief device is fixed to the top cover assembly 1 by four sets of lifting bolts 1-9. The detachable connection of the anti-drip cover 3-1 of the pressure relief device is realized, and the cabinet is hoisted.

[0045] Furthermore, if Figure 3-4 As shown, the small busbar terminal assembly includes a small busbar terminal 1-3, and the small busbar terminal 1-3 is installed on the upper surface of the top cover plate assembly 1 through the small busbar terminal bracket 1-2, and the small busbar room drip-proof cover 2 is located above the small busbar terminal 1-3. The top cover plate assembly 1 also has a brow 1-1 and a small busbar room support frame 1-7, and the small busbar room support frame 1-7 is equipped with a hinge A1-8 hinged to the small busbar room drip-proof cover 2, and the upper end of the brow 1-1 is bent to form a bearing plate D for the small busbar room drip-proof cover 2.

[0046] Through the coordinated action of the eyebrow 1-1, the small busbar room support frame 1-7 and the small busbar room drip-proof cover 2, water droplets are blocked to prevent the water droplets from affecting the small busbar terminal components.

[0047] Furthermore, the top cover plate assembly 1 includes a pressure relief top cover 1-10, a lighting lamp 1-6 is installed on the lower surface of the pressure relief top cover 1-10, and a travel switch 1-4 is installed through a travel switch bracket 1-5.

[0048] Furthermore, the height of the pressure relief fixed shelf A3-6 is higher than the height of the first air duct.

[0049] Furthermore, the first side, the second side and the third side of the anti-drip cover 3-1 of the pressure relief device have water-retaining flanges.

[0050] Furthermore, the pressure relief cover 1-10 is provided with corresponding pressure relief holes at positions corresponding to the vents of the circuit breaker chamber, the vents of the busbar chamber, and the vents of the cable chamber.

[0051] The top cover pressure relief device with anti-drip function described in the utility model can release the pressure of the switch cabinet to prevent the pressure in the switch cabinet from being too high by using high-temperature and high-pressure gas to open the corresponding anti-drip cover plates of the circuit breaker chamber, the anti-drip cover plates of the busbar chamber and the anti-drip cover plates of the cable chamber to a certain angle when an abnormality occurs inside the high-voltage switch cabinet.

[0052] The top cover pressure relief device with anti-drip function described in the utility model can block the water drops when water drops fall from the top cover plate assembly, thereby preventing water drops from entering the switch cabinet from the vent and causing safety accidents. Compared with the prior art, the protection level of the switch cabinet is higher and can be applied to special occasions such as mines.

[0053] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the present utility model is defined by the attached claims and their equivalents.

[0054] The details not described in the present invention are all known technologies to those skilled in the art.

Claims

1. A top cover pressure relief device with a drip-proof function, comprising a top cover plate assembly (1) and a small busbar terminal assembly mounted on the top cover plate assembly (1), characterized in that: The small busbar terminal assembly cover is arranged below the small busbar chamber anti-drip cover (2); a pressure relief device anti-drip assembly (3) is also installed on the top cover assembly (1); the pressure relief device anti-drip assembly (3) comprises a pressure relief device anti-drip cover (3-1); the pressure relief device anti-drip cover (3-1) is detachably installed on the upper surface of the top cover assembly (1); the pressure relief device anti-drip cover (3-1) has a circuit breaker chamber vent, a busbar chamber vent, and a cable chamber vent arranged in parallel; and further comprises a first air duct extending upward from the circuit breaker chamber vent, a second air duct extending upward from the busbar chamber vent, and a third air duct extending upward from the cable chamber vent; the first air duct, the second air duct, and the third air duct are respectively covered with a circuit breaker chamber anti-drip cover (3-3), a busbar chamber anti-drip cover (3-4), and a cable chamber anti-drip cover (3-5).

2. The top cover pressure relief device with anti-drip function according to claim 1, characterized in that: The circuit breaker chamber vent is a rectangular hole; the first air duct is formed by enclosing a first side plate, a second side plate, a third side plate, and a fourth side plate; the circuit breaker chamber anti-drip cover plate (3-3) is a rectangular plate, and its four sides are respectively bent downward to form edge guards A, edge guards B, edge guards C, and edge guards D; the circuit breaker chamber anti-drip cover plate (3-3) is located above the circuit breaker chamber vent; the edge guard A is provided with a hinge B (3-2) hinged to the pressure relief device anti-drip cover (3-1); a pressure relief fixed bracket A (3-6) is fixed to the third side plate; the upper end of the pressure relief fixed bracket A (3-6) is bent to form a bearing plate A for supporting the circuit breaker chamber anti-drip cover plate (3-3).

3. The top cover pressure relief device with anti-drip function according to claim 2, characterized in that: The busbar room vent is a rectangular hole; the second air duct is formed by enclosing a fifth side plate, a sixth side plate, a seventh side plate, and an eighth side plate; the busbar room anti-drip cover plate (3-4) is a rectangular plate, and its four sides are respectively bent downward to form edge guards E, edge guards F, edge guards G, and edge guards H; the busbar room anti-drip cover plate (3-4) is located above the busbar room vent; the edge guard E is provided with a hinge C hinged to the pressure relief device anti-drip cover (3-1); a pressure relief fixed frame B is fixed to the seventh side plate; the upper end of the pressure relief fixed frame B is bent to form a bearing plate B for supporting the busbar room anti-drip cover plate (3-4).

4. The top cover pressure relief device with anti-drip function according to claim 3, characterized in that: The cable room vent is a rectangular hole; the third air duct is formed by enclosing a ninth side panel, a tenth side panel, an eleventh side panel, and a twelfth side panel; the cable room anti-drip cover (3-5) is a rectangular plate, and its four sides are respectively bent downward to form edge guards J, edge guards K, edge guards M, and edge guards N; the cable room anti-drip cover (3-5) is located above the cable room vent; the edge guard J is provided with a hinge D hinged to the pressure relief device anti-drip cover (3-1); a pressure relief fixed frame C is fixed to the eleventh side panel; the upper end of the pressure relief fixed frame C is bent to form a bearing plate C for supporting the cable room anti-drip cover (3-5).

5. The top cover pressure relief device with anti-drip function according to claim 4, characterized in that: The pressure relief device anti-drip cover (3-1) is fixed to the top cover plate assembly (1) via four sets of lifting bolts (1-9).

6. The top cover pressure relief device with anti-drip function according to claim 5, characterized in that: The small busbar terminal assembly comprises a small busbar terminal (1-3); the small busbar terminal (1-3) is mounted on the upper surface of the top cover assembly (1) via a small busbar terminal bracket (1-2); the small busbar chamber drip-proof cover (2) is located above the small busbar terminal (1-3); the top cover assembly (1) also comprises a brow (1-1) and a small busbar chamber support frame (1-7); a hinge A (1-8) hinged to the small busbar chamber drip-proof cover (2) is mounted on the small busbar chamber support frame (1-7); the upper end of the brow (1-1) is bent to form a bearing plate D for the small busbar chamber drip-proof cover (2).

7. The top cover pressure relief device with anti-drip function according to claim 6, characterized in that: The top cover assembly (1) comprises a pressure relief top cover (1-10), a lighting lamp (1-6) is installed on the lower surface of the pressure relief top cover (1-10), and a travel switch (1-4) is installed via a travel switch bracket (1-5).

8. The top cover pressure relief device with anti-drip function according to claim 7, characterized in that: The height of the pressure relief fixed shelf A (3-6) is higher than the height of the first air duct.

9. The top cover pressure relief device with anti-drip function according to claim 8, characterized in that: The first side, the second side and the third side of the anti-drip cover (3-1) of the pressure relief device are provided with water-retaining flanges.

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