Distribution transformer with explosion-proof structure

Abstract

The utility model relates to the technical field of distribution transformers, in particular to a distribution transformer with an explosion-proof structure, which comprises a distribution transformer shell, a fixing component, a restraining component and a plug-in component, an explosion-proof safety tube is arranged on one side of the distribution transformer shell, a flange plate is arranged on one side of the explosion-proof safety tube, and a pressure release valve shell is arranged on one side of the flange plate. A pressing fixing groove is formed in the inner side of the pressure release valve shell, a plurality of ball moving grooves are formed in the inner side of the pressure release valve shell, each ball moving groove communicates with the pressing fixing groove, the fixing assemblies are arranged on the inner sides of the ball moving grooves, the fixing assemblies comprise a plurality of balls, preliminary fixing is conducted through the inserting-connecting assemblies and the restraining assemblies, and then the fixing assemblies enable the interior to be connected. The external part is fixed through the fixing nut, and the device can perform internal connection more tightly while flange connection is performed, so that the reliability of overall connection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution transformers, in particular to a distribution transformer with an explosion-proof structure. Background Art

[0002] The explosion-proof structure design of the distribution transformer is to ensure that when a fault occurs inside the transformer, it can effectively prevent the occurrence of explosion and fire, protect the environment and personnel safety. Generally, when the transformer is in use, the internal temperature is too high, which produces gas, causing the internal pressure to be too high, which may cause the distribution transformer to explode.

[0003] Existing distribution transformers usually use explosion-proof pressure relief valves to discharge the gas accumulated inside so that it does not reach the pressure required for explosion, thereby protecting the distribution transformer;

[0004] However, the connection parts of the explosion-proof pressure relief valve during installation need to have good sealing performance and stable and reliable connections. Therefore, a better connection component is designed to install the explosion-proof pressure relief valve to reduce the possibility of problems at the connection. Utility Model Content

[0005] The purpose of the present utility model is to provide a distribution transformer with an explosion-proof structure to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A distribution transformer with an explosion-proof structure, the distribution transformer with the explosion-proof structure comprising:

[0008] A distribution transformer housing, wherein an explosion-proof safety tube is provided on one side of the distribution transformer housing, a flange is provided on one side of the explosion-proof safety tube, a pressure relief valve housing is provided on one side of the flange, a pressing and fixing groove is provided on the inner side of the pressure relief valve housing, and a plurality of ball movable grooves are provided on the inner side of the pressure relief valve housing, each ball movable groove is connected to the pressing and fixing groove;

[0009] A fixing assembly, the fixing assembly being arranged inside the ball movable groove and comprising a plurality of balls;

[0010] The constraint assembly is arranged inside the pressing and fixing groove, and the constraint assembly includes a pressing and restraining plate, a fixing sleeve, a return spring, a connecting restraining plate, and an unlocking pressing block;

[0011] The plug-in assembly is arranged on one side of the flange, and the plug-in assembly includes a sealing fixing tube and a fixing constraint groove.

[0012] Preferably, a ball is provided on the inner side of each ball movable groove, a pressing constraint plate is provided on the inner side of the pressing and fixing groove, and a fixing sleeve is provided on one side of the pressing and constraining plate.

[0013] Preferably, one end of each ball movable groove abuts against the fixed sleeve, a plug-in fixing groove is provided on the inner side of the pressure relief valve housing, the plug-in fixing groove is communicated with the ball movable groove, and a sealing fixing tube is provided on one side of the flange.

[0014] Preferably, one end of the sealing fixing tube is plugged into the inner side of the plug-in fixing groove, a fixing constraint groove is provided on the sealing fixing tube, and one end of each ball is plugged into the inner side of the fixing constraint groove.

[0015] Preferably, a return spring is provided inside the pressing and fixing groove, one end of the return spring is connected to the pressing and restraining plate, and two connecting restraining plates are provided at one end of the pressing and restraining plate.

[0016] Preferably, one end of each of the connection constraint plates is arranged on the inner side of the pressure relief valve housing, and one side of each connection constraint plate is provided with an unlocking pressing block, which is arranged on the outer side of the pressure relief valve housing.

[0017] Preferably, a plurality of fixing screws are provided on one side of the pressure relief valve housing, one end of each fixing screw passes through the flange and is suspended in the air, and a fixing nut is sleeved on each fixing screw.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The initial fixation is performed through the plug-in component and the constraint component, and then the internal connection is made by the fixing component, and the external connection is fixed by the fixing nut. The device can perform a tighter internal connection while the flange connection is performed, thereby improving the reliability of the overall connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the fixing assembly of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the plug-in assembly of the utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the housing of the pressure relief valve of the present invention;

[0024] Figure 5 This is a schematic diagram of the inner structure of the pressure relief valve housing of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the constraint component of the utility model.

[0026] In the figure: distribution transformer housing 1, explosion-proof safety tube 2, flange 3, sealing fixing tube 4, pressure relief valve housing 5, pressing fixing groove 6, plug-in fixing groove 8, ball movable groove 9, ball 10, pressing constraint plate 11, fixing sleeve 12, return spring 13, connecting constraint plate 14, fixing constraint groove 15, unlocking pressing block 16, fixing screw 17, fixing nut 18. DETAILED DESCRIPTION

[0027] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figures 1-6 The utility model provides three technical solutions: a distribution transformer with an explosion-proof structure includes:

[0029] An explosion-proof safety tube 2 is provided on one side of the distribution transformer housing 1, a flange 3 is provided on one side of the explosion-proof safety tube 2, a pressure relief valve housing 5 is provided on one side of the flange 3, a pressing and fixing groove 6 is provided on the inner side of the pressure relief valve housing 5, a plurality of ball movable grooves 9 are provided on the inner side of the pressure relief valve housing 5, each ball movable groove 9 is connected to the pressing and fixing groove 6, a fixing assembly is provided on the inner side of the ball movable groove 9, the fixing assembly includes a plurality of balls 10, each ball movable groove 9 is provided with a ball 10, a pressing and restraining plate 11 is provided on the inner side of the pressing and restraining groove 6, and a fixing sleeve 12 is provided on one side of the pressing and restraining plate 11;

[0030] One end of each ball movable groove 9 is in contact with the fixed sleeve 12, and a plug-in fixing groove 8 is provided on the inner side of the pressure relief valve housing 5. The plug-in fixing groove 8 is connected to the ball movable groove 9. A sealing fixing tube 4 is provided on one side of the flange 3, and external fixation is performed by connecting the flange 3 with the fixing screw 17.

[0031] Embodiment 2: Based on embodiment 1, the constraint assembly is arranged inside the pressing and fixing groove 6. The constraint assembly includes a pressing and restraining plate 11, a fixing sleeve 12, a return spring 13, a connecting and restraining plate 14, and an unlocking and pressing block 16. One end of the sealing and fixing tube 4 is plugged into the inner side of the plug-in fixing groove 8. A fixed restraining groove 15 is provided on the sealing and fixing tube 4. One end of each ball 10 is plugged into the inner side of the fixed restraining groove 15. When the pressing and restraining plate 11 releases the limit on the ball 10, the ball 10 can move inside the ball movable groove, thereby releasing the fixation of the sealing and fixing tube 4.

[0032] A return spring 13 is provided on the inner side of the pressing and fixing groove 6, one end of the return spring 13 is connected to the pressing and restraining plate 11, and two connecting restraining plates 14 are provided at one end of the pressing and restraining plate 11. The return spring 13 can reset the pressing and restraining plate 11, so that the fixing sleeve 12 can restrain the ball 10 again.

[0033] Example three: On the basis of Example two, the plug-in assembly is arranged on one side of the flange 3, and the plug-in assembly includes a sealing fixing tube 4 and a fixing constraint groove 15. One end of each connecting constraint plate 14 is arranged on the inner side of the pressure relief valve housing 5, and one side of each connecting constraint plate 14 is provided with an unlocking pressing block 16. The unlocking pressing block 16 is arranged on the outer side of the pressure relief valve housing 5. One side of the pressure relief valve housing 5 is provided with multiple fixing screws 17. One end of each fixing screw 17 passes through the flange 3 and is suspended in the air. A fixing nut 18 is sleeved on each fixing screw 17. When installing the pressure relief valve housing 5, it is initially fixed by the plug-in assembly and the constraint assembly, and then the fixing assembly is used to connect the inside, and the outside is fixed by the fixing nut 18 to complete the entire installation.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distribution transformer with an explosion-proof structure, characterized in that: The explosion-proof distribution transformer comprises: A distribution transformer housing (1), wherein an explosion-proof safety tube (2) is provided on one side of the distribution transformer housing (1), a flange (3) is provided on one side of the explosion-proof safety tube (2), a pressure relief valve housing (5) is provided on one side of the flange (3), a pressing and fixing groove (6) is provided on the inner side of the pressure relief valve housing (5), and a plurality of ball movable grooves (9) are provided on the inner side of the pressure relief valve housing (5), and each ball movable groove (9) is connected to the pressing and fixing groove (6); A fixing assembly, the fixing assembly being arranged inside the ball movable groove (9), and comprising a plurality of balls (10); A constraint assembly, the constraint assembly being arranged inside the pressing and fixing groove (6), the constraint assembly comprising a pressing and restraining plate (11), a fixing sleeve (12), a return spring (13), a connecting and restraining plate (14), and an unlocking and pressing block (16); A plug-in assembly is provided on one side of a flange (3), and the plug-in assembly comprises a sealing fixing tube (4) and a fixing restraining groove (15).

2. The distribution transformer with an explosion-proof structure according to claim 1, characterized in that: A ball (10) is provided inside each ball movable groove (9), a pressing constraint plate (11) is provided inside the pressing fixed groove (6), and a fixing sleeve (12) is provided on one side of the pressing constraint plate (11).

3. The distribution transformer with an explosion-proof structure according to claim 2, characterized in that: One end of each ball movable groove (9) is in contact with a fixed sleeve (12); a plug-in fixed groove (8) is provided on the inner side of the pressure relief valve housing (5); the plug-in fixed groove (8) is communicated with the ball movable groove (9); and a sealing fixed tube (4) is provided on one side of the flange (3).

4. The distribution transformer with an explosion-proof structure according to claim 3, characterized in that: One end of the sealing fixing tube (4) is plugged into the inner side of the plug-in fixing groove (8), a fixing constraint groove (15) is provided on the sealing fixing tube (4), and one end of each ball (10) is plugged into the inner side of the fixing constraint groove (15).

5. The distribution transformer with an explosion-proof structure according to claim 4, characterized in that: A return spring (13) is provided inside the pressing fixing groove (6), one end of the return spring (13) is connected to the pressing constraint plate (11), and one end of the pressing constraint plate (11) is provided with two connecting constraint plates (14).

6. The distribution transformer with an explosion-proof structure according to claim 5, characterized in that: One end of each connection constraint plate (14) is arranged on the inner side of the pressure relief valve housing (5), and one side of each connection constraint plate (14) is provided with an unlocking pressing block (16), which is arranged on the outer side of the pressure relief valve housing (5).

7. The distribution transformer with an explosion-proof structure according to claim 6, characterized in that: A plurality of fixing screws (17) are provided on one side of the pressure relief valve housing (5), one end of each fixing screw (17) passes through the flange (3) and is suspended in the air, and a fixing nut (18) is sleeved on each fixing screw (17).

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