Transformer bushing with novel installation structure

Abstract

The utility model discloses a novel installation structure transformer bushing which comprises a porcelain bottle and a conducting rod arranged on the inner side of the middle of the porcelain bottle, the tail end of the upper side of the conducting rod is provided with a wiring terminal, the tail end of the lower side of the conducting rod is provided with a connecting nut, and the joint of the porcelain bottle and the tail end of the lower side of the conducting rod is provided with an American transformer flange. The bushing can automatically release overhigh air pressure in the bushing through an automatic deflation function, prevents a porcelain bottle from being broken due to overhigh pressure, avoids possible safety accidents such as electric leakage and short circuit, protects the safety of equipment and personnel, can adjust the internal pressure in time, can reduce the equipment fault probability caused by the pressure problem, and improves the working efficiency. According to the utility model, the operation of the transformer bushing is more stable and reliable, the continuity of power transmission is ensured, the damage of abnormal pressure to porcelain bottles and other parts is avoided, the service lives of the transformer bushing and the whole transformer equipment are prolonged, and the maintenance and replacement cost of the equipment is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of transformer bushings, specifically relating to a novel installation structure for transformer bushings. Background Technology

[0002] New-type transformer bushings, also known as transformer bushings, are an important component of power transformers. They are mainly used to connect the high-voltage windings inside the transformer to the external circuit, while ensuring insulation and sealing performance. With the development of power systems, transformer bushings are constantly being innovated in terms of materials, design, and manufacturing processes to improve their electrical performance, mechanical strength, and durability.

[0003] Existing bushings lack an effective automatic pressure release mechanism, requiring manual venting at regular intervals. When the internal gas pressure rises due to various reasons, the gas cannot be released in time, which can easily lead to bushing damage or even explosions and other safety accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of installation structure transformer bushing to solve the problem that the existing transformer bushings in the background art lack an effective automatic pressure release mechanism, require manual venting at regular intervals, and when the internal gas pressure rises for various reasons, the gas cannot be discharged in time, which can easily lead to bushing damage or even explosion and other safety accidents.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel installation structure transformer bushing, comprising a porcelain insulator and a conductive rod disposed on the inner side of the middle of the porcelain insulator;

[0006] The upper end of the conductive rod is provided with a terminal block, and the lower end of the conductive rod is provided with a connecting nut.

[0007] A variable flange is provided at the connection between the porcelain bottle and the lower end of the conductive rod, and a positioning ring is provided at the connection between the inner side of the porcelain bottle and the lower end of the conductive rod.

[0008] A venting hood body is provided on the upper side of the porcelain bottle and at the connection with the conductive rod, and a venting hood sealing gasket is provided at the connection between the venting hood body and the porcelain bottle.

[0009] The venting hood body has a venting bolt body inside on the right side.

[0010] The venting hood body has a through hole on the left side inside, and a valve body is provided on the right side of the through hole. An air inlet is provided on the middle inner side of the valve body. A valve core is provided on the middle inner side of the left side of the valve body. An air vent is provided on the middle inner side of the valve core. A connecting cylinder is provided on the left outer side of the valve core. A sealing ring is provided at the right connection between the valve core and the connecting cylinder. An air vent is provided on the middle inner side of the left side of the connecting cylinder, and a metal spring connected to the valve core is provided in the air vent.

[0011] Preferably, the valve body is connected to the through hole via a threaded connection, and the connecting cylinder is connected to the vent cover body via a thread.

[0012] Preferably, the two ends of the metal spring are fixedly connected to the valve core and the inner wall of the left side of the connecting cylinder, respectively. Under normal pressure, the valve core moves towards the air inlet under the elastic force of the metal spring.

[0013] Preferably, the gas can enter the vent in the valve core from the air inlet and be introduced into the vent chamber, and the connecting cylinder and the valve body are connected by a threaded connection.

[0014] Preferably, a connecting protrusion is provided at the middle position of the porcelain bottle, a pressure cap is provided on the upper outer side of the connecting protrusion, a welding flange is provided on the lower side of the pressure cap, and multiple bolts are threadedly connected to the connection between the pressure cap and the welding flange for fixing, and rectangular sealing gaskets are respectively provided at the connection between the pressure cap, the welding flange and the connecting protrusion for sealing.

[0015] Preferably, the connection between the vent bolt body and the vent cover body is sealed with a vent bolt sealing gasket, the outer diameter of the lower end of the transformer flange and the porcelain insulator is sealed with a sealing gasket, and the outer side of the transformer flange is provided with a grounding transformer hole for connecting to the external ground wire.

[0016] Compared with the prior art, this utility model provides a novel installation structure for transformer bushings, which has the following advantages:

[0017] 1. This bushing has an automatic venting function, which can automatically release excessive air pressure inside the bushing, preventing the porcelain insulator from rupturing due to excessive pressure, avoiding potential safety accidents such as leakage and short circuit, and protecting the safety of equipment and personnel.

[0018] In addition, timely adjustment of internal pressure can reduce the probability of equipment failure caused by pressure problems, making the operation of transformer bushings more stable and reliable, ensuring the continuity of power transmission, avoiding damage to porcelain insulators and other components due to abnormal pressure, helping to extend the service life of transformer bushings and the entire transformer equipment, and reducing equipment maintenance and replacement costs.

[0019] 2. The automatic venting function eliminates the need for frequent manual inspections and venting of the equipment, reducing the workload and frequency of maintenance personnel and improving maintenance efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the sleeve in this utility model.

[0021] Figure 2 In this utility model Figure 1 A magnified diagram of the central circular area.

[0022] Figure 3 This is a structural schematic diagram of the connecting cylinder and valve body from a side view in this utility model.

[0023] Figure 4 In this utility model Figure 3 A structural diagram from a frontal view.

[0024] Figure 5 This is a schematic diagram of the structure of the connecting cylinder and valve body after they are connected in this utility model.

[0025] In the diagram: 1. Positioning ring; 2. Variable flange; 3. Connecting nut; 4. Welding flange; 5. Conductive rod; 6. Porcelain insulator; 7. Vent cover gasket; 8. Vent cover body; 9. Vent bolt body; 10. Vent bolt gasket; 11. Gland; 12. Connecting protrusion; 13. Terminal block; 14. Rectangular gasket; 15. Valve body; 16. Air inlet; 17. Valve core; 18. Vent port; 19. Metal spring; 20. Vent chamber; 21. Connecting cylinder; 22. Sealing ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model provides, for example Figure 1-5 The transformer bushing with a novel installation structure shown includes a porcelain insulator 6 and a conductive rod 5 disposed on the inner side of the middle of the porcelain insulator 6.

[0028] A terminal block 13 is provided at the upper end of the conductive rod 5, and a connecting nut 3 is provided at the lower end of the conductive rod 5.

[0029] Optionally, the user can connect to an external circuit via terminal 13 to achieve power input or output; the connecting nut 3 at the lower end of the conductive rod 5 can be connected to conductive components in equipment such as transformers to ensure the stability of the conductive path.

[0030] A variable flange 2 is provided at the lower end connection between the porcelain bottle 6 and the conductive rod 5, and a positioning ring 1 is provided at the lower connection between the inner side of the porcelain bottle 6 and the conductive rod 5.

[0031] Optionally, users can install and position the transformer and other equipment through the transformer flange 2. The grounding transformer hole on the outside is connected to the external ground wire to ensure electrical safety. The connecting protrusion 12 in the middle of the porcelain insulator 6, together with the pressure cap 11 and the welding flange 4, is fixed with bolts to further secure the sleeve to the equipment. The rectangular sealing gasket 14 ensures the sealing of the connection.

[0032] A venting hood body 8 is provided on the upper side of the porcelain bottle 6 and at the connection point of the conductive rod 5, and a venting hood sealing gasket 7 is provided at the connection point of the venting hood body 8 and the porcelain bottle 6.

[0033] The porcelain insulator 6 serves as the main insulating component, isolating the conductive rod 5 from the external environment to prevent leakage. Various sealing gaskets, such as the sealing gasket between the transformer flange 2 and the outer diameter of the lower end of the porcelain insulator 6, and the sealing gasket 10 at the connection between the vent bolt body 9 and the vent cover body 8, prevent moisture, dust, and other impurities from entering, maintaining the internal insulating environment.

[0034] The positioning ring 1 fixes the conductive rod 5 inside the porcelain bottle 6, while preventing the wire from contacting the inner wall of the porcelain bottle and damaging the porcelain bottle 6.

[0035] The venting hood body 8 has a venting bolt body 9 inside on the right side. A connecting protrusion 12 is located in the middle of the porcelain insulator 6. A pressure cap 11 is located on the upper outer side of the connecting protrusion 12. A welding flange 4 is located on the lower side of the pressure cap 11. The connection between the pressure cap 11 and the welding flange 4 is fixed by multiple bolts connected by threads. Rectangular sealing gaskets 14 are provided at the connection between the pressure cap 11, the welding flange 4, and the connecting protrusion 12 for sealing. A venting bolt sealing gasket 10 is provided at the connection between the venting bolt body 9 and the venting hood body 8 for sealing. A sealing gasket is provided on the outer diameter of the lower end of the transformer flange 2 and the porcelain insulator 6 for sealing. A grounding transformer hole is provided on the outer side of the transformer flange 2 for connecting to the external ground wire.

[0036] Optionally, a reinforcing rib is provided on the outside of the transformer flange 2, and an adhesive resin is provided on the mating surface of the transformer flange 2 and the porcelain bottle 6. The sealant is applied to the resin to bond and fix the porcelain bottle 6 and the transformer flange 2. In addition, multiple umbrella-shaped protrusions are provided on the upper side of the porcelain bottle 6. Semi-conductive paint is applied to the mating surface of the porcelain bottle 6 from the last umbrella to the porcelain bottle 6, so that the lower end of the porcelain bottle 6 and the transformer flange 2 can conduct and balance the magnetic field.

[0037] Optionally, the upper opening of the porcelain bottle 6 and the main body of the vent hood 8 are both provided with an anti-ultraviolet coating for protection against ultraviolet rays.

[0038] like Figure 1-5 As shown, the valve body 15 is connected to the through hole via a threaded connection, and the connecting cylinder 21 is connected to the vent hood body 8 via a thread. The two ends of the metal spring 19 are fixedly connected to the valve core 17 and the inner wall of the left side of the connecting cylinder 21, respectively. Under normal pressure, the valve core 17 moves towards the air inlet 16 under the elastic force of the metal spring 19. Gas can enter the vent 18 inside the valve core 17 from the air inlet 16 and be introduced into the vent chamber 20. The connecting cylinder 21 and the valve body 15 are connected via a threaded connection.

[0039] Preferably, in this device, the valve body and the venting hood body are installed via a threaded connection. The connecting cylinder is connected to the venting hood body via a thread, and the valve body is also connected to the connecting cylinder via a threaded connection, thus securely mounting it on the venting hood body. Under normal operating conditions, the valve core moves towards the air inlet under the elastic force of the metal spring, remaining in a closed state at normal pressure. When the internal air pressure of the transformer bushing rises to a certain level, gas enters the vent port inside the valve core from the air inlet, and then flows into the venting chamber. At this point, the gas pressure overcomes the elastic force of the metal spring, pushing the valve core away from the air inlet, allowing the gas to be discharged through the one-way vent valve, thus achieving the automatic venting function.

[0040] This structure utilizes the interaction between the spring force and gas pressure. When the gas pressure inside the transformer bushing is greater than the spring force of the metal spring, the gas pushes the valve core to overcome the spring force, opening the gas outlet and allowing the gas to escape. When the internal pressure drops below the spring force, the spring pushes the valve core back to its original position, closing the gas outlet and preventing external gas from entering, thus achieving a unidirectional gas outlet function.

[0041] When used in bushings, this structure can release excessive air pressure in the bushing in a timely manner, effectively preventing safety accidents such as porcelain insulator rupture caused by excessive pressure, protecting the integrity of transformer bushings and related equipment, and avoiding power failures and safety hazards caused by equipment damage.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel installation structure transformer bushing, comprising a porcelain insulator (6) and a conductive rod (5) disposed on the inner side of the middle of the porcelain insulator (6). The upper end of the conductive rod (5) is provided with a terminal (13), and the lower end of the conductive rod (5) is provided with a connecting nut (3). A variable flange (2) is provided at the lower end connection of the porcelain bottle (6) and the conductive rod (5), and a positioning ring (1) is provided at the lower end connection of the porcelain bottle (6) and the conductive rod (5). A venting hood body (8) is provided on the upper side of the porcelain bottle (6) and at the connection point of the conductive rod (5), and a venting hood sealing gasket (7) is provided at the connection point of the venting hood body (8) and the porcelain bottle (6). The venting hood body (8) has a venting bolt body (9) inside on the right side. Its features are: The main body (8) of the vent has a through hole on the left side and a valve body (15) on the right side of the through hole. The valve body (15) has an air inlet (16) on the middle inner side. The valve core (17) is located on the middle inner side of the left side of the valve body (15). The valve core (17) has an air vent (18) on the middle inner side. The valve core (17) has a connecting cylinder (21) on the left outer side. The valve core (17) and the connecting cylinder (21) have a sealing ring (22) at the right connection. The connecting cylinder (21) has an air vent (20) on the middle inner side. The air vent (20) has a metal spring (19) connected to the valve core (17) inside the air vent (20).

2. The novel installation structure transformer bushing according to claim 1, characterized in that: The valve body (15) is connected to the through hole by a threaded connection, and the connecting cylinder (21) is connected to the vent hood body (8) by a thread.

3. The novel installation structure transformer bushing according to claim 2, characterized in that: The two ends of the metal spring (19) are fixedly connected to the valve core (17) and the inner wall of the left side of the connecting cylinder (21), respectively. Under normal pressure, the valve core (17) is moved towards the air inlet (16) by the elastic force of the metal spring (19).

4. A novel installation structure transformer bushing according to claim 3, characterized in that: Gas can enter the vent (18) inside the valve core (17) from the air inlet (16) and be introduced into the vent chamber (20). The connecting cylinder (21) and the valve body (15) are connected by a threaded connection.

5. A novel installation structure transformer bushing according to claim 1, characterized in that: A connecting protrusion (12) is provided at the middle position of the porcelain bottle (6). A pressure cap (11) is provided on the upper outer side of the connecting protrusion (12). A welding flange (4) is provided on the lower side of the pressure cap (11). Multiple bolts are threadedly connected to the connection between the pressure cap (11) and the welding flange (4) for fixing. Rectangular sealing gaskets (14) are provided at the connection between the pressure cap (11), the welding flange (4), and the connecting protrusion (12) for sealing.

6. The novel installation structure transformer bushing according to claim 1, characterized in that: The connection between the vent bolt body (9) and the vent cover body (8) is sealed with a vent bolt sealing gasket (10). The outer diameter of the lower end of the transformer flange (2) and the porcelain bottle (6) is sealed with a sealing gasket. The outer side of the transformer flange (2) is provided with a grounding transformer hole for connecting to the external ground wire.

Images