Box-type transformer substation with concentrated pressure release channel

Abstract

The utility model discloses a box-type transformer substation with a concentrated pressure release channel, relates to the technical field of box-type transformer substations, and aims to solve the problems that after the internal pressure of the current box-type transformer substation breaks through a pressure release valve for exhausting, a pressure plate can generate a suction effect when resetting under the elastic force of a spring, and the pressure plate cannot return. The box-type transformer substation comprises a box-type transformer substation body of which the top is provided with a top cover, and one side of the top of the top cover is detachably provided with a pressure release assembly which is in sealed connection with the interior of the box-type transformer substation body. The pressure release assembly comprises a pressure release structure with the top detachably provided with a reset structure, the pressure release structure comprises a lower valve seat with an exhaust pipe arranged on the outer edge face, a second flange plate is arranged at the end, away from the lower valve seat, of the exhaust pipe, and a non-return assembly is detachably installed in the second flange plate. The utility model has the advantage of reducing air backflow.

Description

Technical Field

[0001] The utility model relates to the technical field of box-type transformers, and more specifically to a box-type transformer with a centralized pressure release channel. Background Art

[0002] Box-type substation, also called prefabricated substation or prefabricated substation, is a high-voltage switchgear. It replaces the original civil power distribution room and substation, integrates transformer step-down, low-voltage power distribution and other functions, and is installed in a movable steel structure box. It is suitable for urban network construction and transformation, and is widely used in mines, factories, enterprises, oil and gas fields and wind power stations.

[0003] At present, the existing small box-type substations are usually required to be relatively sealed for objective factors such as dust prevention and prevention of small animals such as mice from entering. Once an arc fault occurs inside the medium-voltage cabinet in the box, a large amount of heat will be generated instantly, causing the pressure in the box to rise sharply, which is very likely to explode. Therefore, in order to eliminate the above risks, a pressure relief valve is usually installed on the side wall of the box-type substation to establish a pressure relief channel that opens according to pressure changes. After the internal pressure of the box-type substation breaks through the pressure relief valve to exhaust, the pressure plate will produce a suction effect when it resets under the elastic force of the spring, causing the air discharged from the box-type substation to carry external air and debris such as dust backflow, thereby affecting the operation of the internal equipment of the box-type substation. In view of this, we propose a box-type substation with a centralized pressure relief channel. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art, meet actual needs, and provide a box transformer with a centralized pressure release channel to solve the technical problem that after the internal pressure of the current box transformer breaks through the pressure release valve to exhaust, the pressure plate will produce a suction effect when it resets under the elastic force of the spring, causing the air discharged from the box transformer to carry external air and dust and other debris backflow, thereby affecting the operation of the internal equipment of the box transformer.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a box transformer with a centralized pressure release channel, comprising a box transformer body with a top cover arranged on the top structure;

[0006] A pressure release component sealed and connected to the inside of the box-type transformer body is detachably mounted on one side of the top of the top cover;

[0007] The pressure release assembly comprises a pressure release structure with a reset structure detachably mounted on the top;

[0008] The pressure release structure comprises a lower valve seat with an exhaust pipe arranged on the outer edge surface, a flange plate 2 is arranged at one end of the exhaust pipe away from the lower valve seat, and a check assembly is detachably installed inside the flange plate 2;

[0009] The non-return assembly includes a flow pipe detachably installed in the exhaust pipe, wherein one end of the flow pipe away from the exhaust pipe is provided with a conical non-return cylinder 1, and the inner structure of the end of the conical non-return cylinder 1 away from the flow pipe is provided with a hemispherical shell 1, and one side of the hemispherical shell 1 is provided with a conical non-return cylinder 2, and the inner structure of the end of the conical non-return cylinder 2 away from the hemispherical shell 1 is provided with a hemispherical shell 2, and the interiors of the hemispherical shells 1 and 2 are respectively provided with through holes 1 and 2, and the conical ends of the conical non-return cylinder 1 and the conical non-return cylinder 2 are arranged in opposite directions.

[0010] The utility model designs a check assembly, and when the internal pressure of the transformer body rises, the internal air enters the conical check cylinder one through the lower valve seat, and enters the conical check cylinder two through the through hole two along the conical inner wall of the conical check cylinder one and the conical outer wall of the conical check cylinder two, so that the air is discharged through the through hole one, and the pressure relief effect is achieved. When suction occurs after the pressure relief is completed, the gas tends to move toward the through hole one. By designing the conical check cylinder one and the conical check cylinder two as conical structures, and setting the conical ends of the conical check cylinder one and the conical check cylinder two in opposite directions, the path for the air to reflux into the lower valve seat is extended, thereby achieving the effect of reducing the air reflux. This solves the problem that after the internal pressure of the transformer breaks through the pressure relief valve to exhaust, the suction effect is generated when the pressure plate is reset under the elastic force of the spring, resulting in the air discharged from the transformer carrying external air and debris such as dust backflowing, thereby affecting the operation of the internal equipment of the transformer.

[0011] Preferably, the internal structure of the lower valve seat is provided with a pressure relief pipe, the top end structure of the pressure relief pipe is provided with a connecting pipe, and an arc chamfered structure is formed on the inner edge surface of the connection between the pressure relief pipe and the connecting pipe structure.

[0012] Preferably, the reset structure comprises an upper valve seat detachably connected to the lower valve seat, a push rod is detachably mounted on the top of the inner wall of the upper valve seat, and a receiving plate is arranged at the bottom end of the push rod.

[0013] Preferably, a spring is fixedly provided on the lower end surface of the receiving plate, the bottom end of the spring extends into the lower valve seat and is fixedly connected to a pressure plate, and a sealing sheet abutting and sealing against the top end of the connecting pipe is fixedly provided on the lower end surface of the pressure plate.

[0014] Preferably, the bottom end structure of the upper valve seat is provided with a connecting plate 2, and the top end structure of the lower valve seat is provided with a connecting plate 1, the connecting plate 1 and the connecting plate 2 are abutted against each other, and the connecting plate 1 and the connecting plate 2 are connected by bolts and nuts.

[0015] Preferably, the bottom end structure of the lower valve seat is provided with a flange plate 1, and the upper end surface of the flange plate 1 is provided with fixing bolts in a ring array, and one end of the fixing bolts is spirally passed through the flange plate 1 and is detachably threadedly connected to the top cover.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] When the pressure inside the valve body rises, the air inside the valve body enters the conical check cylinder 1 through the lower valve seat, and enters the conical check cylinder 2 through the through hole 2 along the conical inner wall of the conical check cylinder 1 and the conical outer wall of the conical check cylinder 2, thereby exhausting the air through the through hole 1 to achieve the effect of pressure relief. When suction occurs after the pressure relief is completed, the gas has a tendency to move toward the through hole 1. By designing the conical check cylinder 1 and the conical check cylinder 2 as conical structures, and setting the conical ends of the conical check cylinder 1 and the conical check cylinder 2 in opposite directions, the path for the air to flow back into the lower valve seat is extended, thereby achieving the effect of reducing the air backflow, solving the problem that after the internal pressure of the box transformer breaks through the pressure relief valve to exhaust, the pressure plate will produce a suction effect when it resets under the elastic force of the spring, causing the air discharged from the box transformer to carry external air and dust and other debris backflow, thereby affecting the operation of the internal equipment of the box transformer.

[0018] 2. The utility model also designs hemispherical shell one and hemispherical shell two. By designing hemispherical shell one and hemispherical shell two into spherical shell shapes, the surfaces relative to the air return direction form spherical curved surfaces, which conform to aerodynamics. In the process of return flow, the air is affected by the spherical curved surfaces of hemispherical shell one and hemispherical shell two and flows along their surfaces, so it is beneficial to reduce the amount of air return flow, and cooperates with the function of extending the return path of conical check cylinder one and conical check cylinder two to further reduce the effect of air return flow, further solving the problem that after the internal pressure of the box transformer breaks through the pressure release valve to exhaust, the pressure plate will produce a suction effect when it resets under the elastic force of the spring, causing the air discharged from the box transformer to carry external air and dust and other debris back, thereby affecting the operation of the internal equipment of the box transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the pressure release assembly of the utility model;

[0021] Figure 3 For this utility model Figure 3 sectional diagram of

[0022] Figure 4 It is a structural schematic diagram of the non-return assembly of the utility model.

[0023] Description of the numbers in the figure:

[0024] 1. Transformer body; 2. Top cover; 3. Pressure release assembly; 301. Lower valve seat; 302. Flange 1; 303. Fixing bolts; 304. Exhaust pipe; 305. Flange 2; 306. Pressure release pipe; 307. Connecting pipe; 308. Connecting plate 1; 309. Upper valve seat; 310. Connecting plate 2; 311. Push rod; 312. Receiver plate; 313. Spring; 314. Pressure plate; 315. Sealing sheet; 4. Check assembly; 401. Flow pipe; 402. Conical check cylinder 1; 403. Hemispherical shell 1; 404. Through hole 1; 405. Conical check cylinder 2; 406. Hemispherical shell 2; 407. Through hole 2. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 4 As shown, the utility model relates to a box transformer with a centralized pressure release channel, comprising a box transformer body 1 with a top cover 2 arranged on the top structure, a pressure release assembly 3 sealed and connected to the box transformer body 1 can be detachably installed on one side of the top of the top cover 2, the pressure release assembly 3 comprises a pressure release structure with a reset structure detachably installed on the top, the pressure release structure comprises a lower valve seat 301 with an exhaust pipe 304 arranged on the outer edge surface, a flange 2 305 is arranged on one end of the exhaust pipe 304 away from the lower valve seat 301, a check assembly 4 can be detachably installed inside the flange 205, and the check assembly 4 comprises a pressure release structure detachably installed on the exhaust pipe A flow pipe 401 in 304, one end of the flow pipe 401 away from the exhaust pipe 304 is structured with a conical check cylinder 1 402, the inner part of the end of the conical check cylinder 1 402 away from the flow pipe 401 is structured with a hemispherical shell 1 403, one side of the hemispherical shell 1 403 is structured with a conical check cylinder 2 405, the inner part of the end of the conical check cylinder 2 405 away from the hemispherical shell 1 403 is structured with a hemispherical shell 2 406, the interiors of the hemispherical shell 1 403 and the hemispherical shell 2 406 are respectively provided with a through hole 1 404 and a through hole 2 407, and the conical ends of the conical check cylinder 1 402 and the conical check cylinder 2 405 are arranged in opposite directions.

[0026] like Figure 2 and Figure 3 As shown, in the embodiment of the present utility model, the internal structure of the lower valve seat 301 is provided with a pressure relief pipe 306, the top end structure of the pressure relief pipe 306 is provided with a connecting pipe 307, and an arc chamfer structure is formed on the inner edge surface of the connection between the pressure relief pipe 306 and the connecting pipe 307.

[0027] like Figure 2 and Figure 3As shown, in an embodiment of the present utility model, the reset structure includes an upper valve seat 309 detachably connected to the lower valve seat 301, and a push rod 311 is detachably installed on the top of the inner wall of the upper valve seat 309, and the bottom end structure of the push rod 311 is provided with a receiving plate 312, and the lower end surface of the receiving plate 312 is fixedly provided with a spring 313, and the bottom end of the spring 313 extends into the lower valve seat 301 and is fixedly connected with a pressure plate 314, and the lower end surface of the pressure plate 314 is fixedly provided with a sealing sheet 315 abutting and sealing against the top end of the connecting pipe 307, the bottom end structure of the upper valve seat 309 is provided with a connecting plate 2 310, and the top structure of the lower valve seat 301 is provided with a connecting plate 1 308, the connecting plate 1 308 and the connecting plate 2 310 are abutted against each other, and the connecting plate 1 308 and the connecting plate 2 310 are connected by bolts and nuts.

[0028] like Figure 1-Figure 3 As shown, in the embodiment of the utility model, the bottom end structure of the lower valve seat 301 is provided with a flange 302, and the upper end surface of the flange 302 is provided with fixing bolts 303 in a ring array, and one end of the fixing bolt 303 is spirally passed through the flange 302 and is detachably threadedly connected to the top cover 2.

[0029] Working principle: This embodiment provides a box transformer with a centralized pressure release channel. When in use, the pressure release assembly 3 is first fixedly installed on the top cover 2 by the fixing bolts 303. When an arcing fault occurs inside the box transformer body 1 and causes the pressure to rise, the pressure acts on the sealing sheet 315 and the pressure plate 314 through the pressure release pipe 306 and the connecting pipe 307, thereby overcoming the elastic force of the spring 313 so that the pressure plate 314 and the sealing sheet 315 are lifted up, so that the air overflows through the gap between the sealing sheet 315 and the connecting pipe 307, so that the air enters the conical check cylinder 1 402, and enters the conical check cylinder 2 405 through the through hole 2 407 along the conical inner wall of the conical check cylinder 1 402 and the conical outer wall of the conical check cylinder 2 405, thereby discharging the air through the through hole 1 404 to achieve the pressure release effect. The pressure release is completed. When suction occurs, the gas tends to move toward the through hole 404. By designing the conical check cylinder 402 and the conical check cylinder 405 as conical structures, and setting the conical ends of the conical check cylinder 402 and the conical check cylinder 405 in opposite directions, the path of air reflux into the lower valve seat 301 is extended, thereby reducing the air reflux. By designing the hemispherical shell 403 and the hemispherical shell 406 as spherical shells, the surfaces relative to the air reflux direction form a spherical surface, which conforms to aerodynamics. In the process of reflux, the air is affected by the spherical surfaces of the hemispherical shell 403 and the hemispherical shell 406 and flows along their surfaces, so it is beneficial to reduce the amount of air reflux, and the function of extending the reflux path of the conical check cylinder 402 and the conical check cylinder 405 is combined to further reduce the effect of air reflux.

[0030] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A box transformer with a centralized pressure release channel, characterized in that: It comprises a box transformer body (1) whose top structure is provided with a top cover (2); A pressure release assembly (3) which is sealed and connected to the inside of the transformer body (1) is detachably mounted on one side of the top of the top cover (2); The pressure release assembly (3) comprises a pressure release structure with a reset structure detachably mounted on the top; The pressure release structure comprises a lower valve seat (301) having an exhaust pipe (304) arranged on the outer edge surface, a flange plate 2 (305) being arranged at one end of the exhaust pipe (304) away from the lower valve seat (301), and a check assembly (4) being detachably mounted inside the flange plate 2 (305); The non-return assembly (4) comprises a flow pipe (401) detachably mounted in an exhaust pipe (304); a conical non-return cylinder (402) is provided at one end of the flow pipe (401) away from the exhaust pipe (304); a hemispherical shell (403) is provided inside the end of the conical non-return cylinder (402) away from the flow pipe (401); a conical non-return cylinder (405) is provided on one side of the hemispherical shell (403); a hemispherical shell (406) is provided inside the end of the conical non-return cylinder (405) away from the hemispherical shell (403); a through hole (404) and a through hole (407) are respectively provided inside the hemispherical shell (403) and the hemispherical shell (406); the conical ends of the conical non-return cylinder (402) and the conical non-return cylinder (405) are arranged in opposite directions.

2. The box-type transformer with a centralized pressure release channel according to claim 1, characterized in that: The lower valve seat (301) is internally structured with a pressure relief pipe (306), the top end of the pressure relief pipe (306) is structured with a connecting pipe (307), and an arc chamfered structure is formed on the inner edge surface of the connection between the pressure relief pipe (306) and the connecting pipe (307).

3. The box-type transformer with a centralized pressure release channel according to claim 1, characterized in that: The reset structure comprises an upper valve seat (309) detachably connected to a lower valve seat (301), a push rod (311) is detachably mounted on the top of the inner wall of the upper valve seat (309), and a receiving plate (312) is arranged at the bottom end of the push rod (311).

4. The box-type transformer with a centralized pressure release channel according to claim 3 is characterized in that: A spring (313) is fixedly provided on the lower end surface of the receiving plate (312), the bottom end of the spring (313) extends into the lower valve seat (301) and is fixedly connected to a pressure plate (314), and a sealing sheet (315) is fixedly provided on the lower end surface of the pressure plate (314) for abutting and sealing against the top end of the connecting pipe (307).

5. The box-type transformer with a centralized pressure release channel according to claim 3, characterized in that: The bottom end structure of the upper valve seat (309) is provided with a connecting plate 2 (310), and the top end structure of the lower valve seat (301) is provided with a connecting plate 1 (308). The connecting plate 1 (308) and the connecting plate 2 (310) are abutted against each other, and the connecting plate 1 (308) and the connecting plate 2 (310) are connected by bolts and nuts.

6. The box-type transformer with a centralized pressure release channel according to claim 1, characterized in that: The bottom end structure of the lower valve seat (301) is provided with a flange plate 1 (302), and the upper end surface of the flange plate 1 (302) is provided with fixing bolts (303) in a ring array, and one end of the fixing bolt (303) is spirally passed through the flange plate 1 (302) and is detachably threadedly connected to the top cover (2).

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