A pressure relief structure for high voltage switch cabinet

Abstract

The utility model provides a high-voltage switch cabinet pressure relief structure, including a switch cabinet body, a pressure relief port protruding from the top of the switch cabinet body, the pressure relief port is a conical port with a large opening facing upward, the pressure relief port is matched with a cover, the cover is a conical structure corresponding to the pressure relief port, the cover is inserted into the pressure relief port, and its conical side surface and the inner surface of the pressure relief port are fitted to form a seal, and a reset structure and a guide structure are provided between the cover and the switch cabinet body. The utility model has a simple structure, and the sealing position of the cover and the pressure relief port is a conical side surface, which avoids the impact of high-pressure gas, ensures the sealing of the cover to the pressure relief port, and improves the use performance of the high-voltage switch cabinet.

Description

Technical Field

[0001] The utility model belongs to the field of high-voltage switch cabinet production, in particular to a high-voltage switch cabinet pressure relief structure. Background Art

[0002] High-voltage switchgear is an electrical device used to receive and distribute electrical energy, and to control and protect circuits. During the operation of the high-voltage switchgear, in order to prevent the high-temperature and high-pressure gas generated by sudden circuit short-circuit faults from damaging the high-voltage switchgear, a pressure relief structure is usually installed on the top of the high-voltage switchgear to timely relieve the high-pressure gas generated instantly in the cabinet.

[0003] At present, the pressure relief structure of high-voltage switch cabinets mostly includes a pressure relief port and a flat plate. The flat plate adopts a thin plate structure and covers the top surface of the pressure relief port to prevent dust from entering. When an emergency occurs in the switch cabinet, the high-pressure gas generated in time impacts the flat plate, the flat plate moves up, the pressure relief port opens, and the high-pressure gas in the cabinet is discharged from the pressure relief port, which relieves the pressure of the cabinet in time. However, this pressure relief structure has the following problems:

[0004] The flat plate is directly impacted during pressure relief. Under the action of high-pressure airflow, the flat plate sometimes deforms, resulting in a decrease in flatness, which affects its sealing performance on the pressure relief port. A loose seal on the pressure relief port causes dust to enter the cabinet. Utility Model Content

[0005] In view of this, the utility model aims to propose a high-voltage switch cabinet pressure relief structure to achieve timely pressure relief of the high-voltage switch cabinet and ensure the sealing of the pressure relief port.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A high-voltage switch cabinet pressure relief structure comprises a switch cabinet body, wherein a pressure relief port is protruding from the top of the switch cabinet body, wherein the pressure relief port is a conical port with a large opening facing upward, wherein the pressure relief port is matched with a cover, wherein the cover is a conical structure corresponding to the pressure relief port, wherein the cover is inserted into the pressure relief port, wherein the conical side surface thereof is fitted with the inner surface of the pressure relief port to form a seal, and a reset structure and a guide structure are provided between the cover and the switch cabinet body.

[0008] Furthermore, the reset structure includes a plurality of springs arranged around the pressure relief port on the top surface of the switch cabinet body, the top of the cover is higher than the pressure relief port, the top of the cover is provided with an outer edge, and the outer edge is connected to the switch cabinet body through springs.

[0009] Furthermore, the guide structure includes a guide rod disposed with the cover facing downward, and a guide sleeve installed in the pressure relief port through a connecting frame, and the guide rod passes through the guide sleeve.

[0010] Furthermore, a linear bearing is provided between the guide rod and the guide sleeve.

[0011] Furthermore, a limit block is provided at the bottom end of the guide rod.

[0012] Furthermore, a barrier is provided on the top surface of the switch cabinet body around the pressure relief port, and a top end of the barrier is higher than the pressure relief port.

[0013] Compared with the prior art, the high-voltage switch cabinet pressure relief structure described in the utility model has the following advantages:

[0014] (1) The utility model has a simple structure. The sealing position of the cover and the pressure relief port is a conical side surface. The sealing position avoids the impact of high-pressure gas, ensures the sealing performance of the cover to the pressure relief port, and improves the performance of the high-voltage switch cabinet.

[0015] (2) In the present invention, a conical exhaust duct is formed between the cover and the pressure relief port after the cover is moved upward, and the high-pressure airflow is discharged obliquely upward rather than horizontally, thereby preventing the high-pressure airflow from harming the human body.

[0016] (3) In the present invention, the setting of the enclosure further prevents the discharged high-pressure airflow from harming the human body, thereby improving the safety performance of the high-voltage switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of a pressure relief structure of a high-voltage switch cabinet described in this embodiment;

[0019] Figure 2 This is a schematic diagram of a high-voltage switch cabinet pressure relief structure in an open pressure relief state according to this embodiment.

[0020] Description of reference numerals:

[0021] 1- switch cabinet body; 2- pressure relief port; 3- cover; 31- outer eaves; 4- linear bearing; 5- guide sleeve; 6- connecting frame; 7- spring; 8- guide rod; 9- enclosure; 10- limit block. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] like Figure 1As shown, a high-voltage switch cabinet pressure relief structure includes a switch cabinet body 1, and a pressure relief port 2 is protruding from the top surface of the switch cabinet body 1. The pressure relief port 2 is a conical port with a large opening facing upward, that is, the pressure relief port 2 is a conical opening with a large opening at the top and a small opening at the bottom. The pressure relief port 2 is matched with a cover 3, and the cover 3 is a conical structure corresponding to the pressure relief port 2. The cover 3 is inserted into the pressure relief port 2, and the conical side of the cover 3 and the inner surface of the pressure relief port 2 are fitted to form a wedge-shaped sealing structure to prevent dust from entering the switch cabinet body 1 through the pressure relief port, thereby ensuring the performance of the switch cabinet body 1. In this structure, the bottom surface of the cover 3 bears the impact force of the high-pressure gas, rather than its conical side surface, to ensure the sealing of the cover to the pressure relief port.

[0024] The top of the cover 3 is higher than the pressure relief port, and an outer eaves 31 is provided on the top of the cover 3. At this time, the outer eaves 31 is radially located outside the pressure relief port 2, that is, the diameter of the outer eaves 31 is larger than the diameter of the large end of the pressure relief port 2. A plurality of springs 7 are provided downward in the circumferential direction of the outer eaves 31, and the outer eaves 31 are connected to the switch cabinet body 1 through the springs 7.

[0025] When a short circuit fault generates high-pressure gas inside the switch cabinet body 1, the high-pressure gas impacts the cover 3, the cover 3 is lifted upward, and an exhaust passage is formed between the cover 3 and the pressure relief port 2. Figure 2 As shown, the high-pressure gas in the cabinet is discharged outward from the exhaust duct to achieve pressure relief. After the pressure relief is completed, the cover 3 is reset and the pressure relief port 2 is resealed under the action of the spring 7. In the utility model, the exhaust duct formed between the cover 3 and the pressure relief port 2 is a ring-conical airway structure, and the high-pressure gas is discharged obliquely upward rather than horizontally, so as to prevent the high-pressure airflow from impacting and injuring the human body and ensure human safety.

[0026] In the utility model, a guide structure is also provided between the cover 3 and the switch cabinet body 1. The guide structure includes a guide rod 8 and a guide sleeve 5. The guide rod 8 is vertically arranged and installed at the center of the bottom surface of the cover 3. The guide sleeve 5 is arranged in the pressure relief port 2 through a connecting frame 6. The connecting frame 6 is preferably a frame structure, such as at least two crossbar structures. A linear bearing 4 is provided in the guide sleeve 5, and the guide rod 8 passes through the linear bearing 4. A limit block 10 is provided at the bottom end of the guide rod 8. This structure ensures the linearity of the up and down movement of the cover 3, enables it to be quickly assembled with the pressure relief port 2, and ensures its sealing effect on the pressure relief port.

[0027] In the present invention, a baffle 9 is provided around the pressure relief port 2 on the top surface of the switch cabinet body 1. The baffle 9 adopts a metal baffle structure, and the upper edge of the baffle 9 is higher than the upper edge of the pressure relief port 2. When the cover 3 moves upward, the pressure relief port 2 is opened, and the high-pressure gas in the switch cabinet body 1 is relieved, since the upper edge of the baffle 9 is higher than the upper edge of the pressure relief port 2, the upper edge of the baffle 9 guides the high-pressure gas flow, so that the gas is discharged obliquely upward to prevent it from hurting the human body, and further improve the safety of the high-voltage switch cabinet.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage switch cabinet pressure relief structure, characterized in that: The device is installed on a switch cabinet body (1), wherein a pressure relief port (2) is protruding from the top of the switch cabinet body (1), wherein the pressure relief port (2) is a conical port with a large opening facing upward, and the pressure relief port (2) is matched with a cover (3), wherein the cover (3) is a conical structure corresponding to the pressure relief port (2), and the cover (3) is inserted into the pressure relief port (2), and its conical side surface is fitted with the inner surface of the pressure relief port (2) to form a seal, and a reset structure and a guide structure are provided between the cover (3) and the switch cabinet body (1).

2. A high-voltage switch cabinet pressure relief structure according to claim 1, characterized in that: The reset structure comprises a plurality of springs (7) arranged around the pressure relief port on the top surface of the switch cabinet body (1); the top of the cover (3) is higher than the pressure relief port (2); the top of the cover (3) is provided with an outer edge (31); and the outer edge (31) is connected to the switch cabinet body (1) via the springs (7).

3. A high-voltage switch cabinet pressure relief structure according to claim 1, characterized in that: The guide structure comprises a guide rod (8) arranged downwardly on the cover (3), and a guide sleeve (5) installed in the pressure relief port (2) through a connecting frame (6), and the guide rod (8) passes through the guide sleeve (5).

4. A high-voltage switch cabinet pressure relief structure according to claim 3, characterized in that: A linear bearing (4) is provided between the guide rod (8) and the guide sleeve (5).

5. A high-voltage switch cabinet pressure relief structure according to claim 3, characterized in that: A limiting block (10) is provided at the bottom end of the guide rod (8).

6. A high-voltage switch cabinet pressure relief structure according to claim 1, characterized in that: The top surface of the switch cabinet body (1) is provided with a baffle (9) around the pressure relief port (2), and the top of the baffle (9) is higher than the pressure relief port (2).

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