Secondary power supply electrical isolation device for high voltage system

Abstract

The utility model discloses a secondary power supply electrical isolation device used for a high voltage system, comprising a motor packaging body, the motor packaging body is connected with an insulation connecting shaft, one end of the insulation connecting shaft far away from the motor packaging body is connected with a generator packaging body, and an epoxy insulation cylinder is connected between the generator packaging body and the motor packaging body. The insulating connecting shaft is positioned in the center of the epoxy insulating cylinder; a concentric shaft limiting device is fixed at the center of the epoxy insulating cylinder, and the insulating connecting shaft vertically and movably penetrates through the center of the concentric shaft limiting device. The secondary power supply electrical isolation equipment for the high-voltage system provided by the utility model can realize electrical isolation between an input power supply and an output power supply, ensures that the power utilization requirement of power system equipment is met, and ensures the stability and safety of the system.

Description

Technical Field

[0001] The utility model belongs to the technical field of power equipment, and particularly relates to an electrical isolation device for secondary power supply in a high-voltage system. Background Art

[0002] With the continuous development of China's economy and the increasing economic scale, the scale of the power grid supporting China's economic development is also expanding continuously. There are more and more electrical equipment put into operation in the power grid, with more complex types, and higher requirements for the stability of the power grid system. In order to improve the safety and reliability of electrical equipment, a device capable of isolating high and low voltage power supplies - an isolation transformer is needed to electrically isolate the input power supply and output power supply of electrical equipment, improve the insulation level and safety of electrical equipment, and ensure the personal safety of operators. However, the current simple and ordinary power supply devices can no longer meet the requirements of the power system. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an electrical isolation device for secondary power supply in a high-voltage system, which can achieve electrical isolation between the input power supply and the output power supply, ensure meeting the power consumption requirements of power system equipment, and ensure the stability and safety of the system.

[0004] The technical solution adopted by the utility model is that an electrical isolation device for secondary power supply in a high-voltage system includes a motor encapsulation body, the motor encapsulation body is connected with an insulating connecting shaft, one end of the insulating connecting shaft far away from the motor encapsulation body is connected with a generator encapsulation body, and an epoxy insulating cylinder is also commonly connected between the generator encapsulation body and the motor encapsulation body. The insulating connecting shaft is located at the center of the epoxy insulating cylinder;

[0005] A concentric shaft limiting device is fixed at the center of the epoxy insulating cylinder, and the insulating connecting shaft vertically and movably penetrates through the center of the concentric shaft limiting device.

[0006] The characteristics of the utility model also lie in that:

[0007] The motor encapsulation body includes a motor box body, the motor box body is connected with the epoxy insulating cylinder through a first connecting flange, a motor support bending plate is arranged in the motor box body, a motor module is arranged on the motor support bending plate, and the output end of the motor module is connected with the insulating connecting shaft through a first coupler;

[0008] A motor control unit is also arranged in the motor box body, and the motor control unit is electrically connected with the motor module;

[0009] A power input end is also arranged on the outer side wall of the motor box body.

[0010] The generator enclosure includes a generator box body, which is connected to an epoxy insulating cylinder through a second connecting flange. A generator module support plate is provided inside the generator box body, and a generator module is provided on the generator module support plate. The generator module is connected to an insulating connecting shaft through a second coupler.

[0011] A generator control unit is also provided inside the generator box body, and the generator control unit is electrically connected to the generator module.

[0012] A power output terminal is also provided on the outer side wall of the generator box body.

[0013] Both between the motor box body and the first connecting flange and between the generator box body and the second connecting flange are fixed by a plurality of fastening bolts.

[0014] The generator module support plate is arranged on the inner wall of the generator box body at the end far from the insulating connecting shaft, and the motor support bent plate is arranged on the inner wall of the motor box body at the end far from the insulating connecting shaft.

[0015] One end of the first coupler is connected to the output end of the motor module, and the other end passes through the first connecting flange to connect to the insulating connecting shaft. One end of the second coupler is connected to the generator module, and the other end passes through the second connecting flange to connect to the insulating connecting shaft.

[0016] The coaxial shaft limiting device includes a coaxial rotating shaft, which is movably sleeved outside the insulating connecting shaft. Three support rods are evenly connected outside the coaxial rotating shaft, and the other ends of the three support rods are respectively connected to the inner wall of the epoxy insulating cylinder. An activity joint is respectively provided on each support rod.

[0017] The beneficial effects of the present utility model are:

[0018] (1) The secondary power electrical isolation device for high-voltage systems of the present utility model is mainly composed of five modules mainly including a generator module, a coupler, an insulating connecting shaft, an epoxy insulating cylinder, and a motor module, realizing the electrical isolation between the high-voltage power supply and the low-voltage power supply, greatly improving the reliability and safety of electrical equipment, and at the same time ensuring the personal safety of operators;

[0019] (2) The secondary power electrical isolation device for high-voltage systems of the present utility model can realize the electrical isolation between the input power supply and the output power supply, ensure to meet the power consumption requirements of power system equipment, and ensure the stability and safety of the system; at the same time, compared with traditional isolation transformers, the design scheme of the present utility model has better anti-interference performance. Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of the electrical isolation device of the present utility model;

[0021] Figure 2It is a schematic structural diagram of the concentric shaft limiting device of the electrical isolation device of the present utility model;

[0022] Figure 3 It is a schematic structural diagram of the movable joint on the support rod in the concentric shaft limiting device of the electrical isolation device of the present utility model.

[0023] In the figure, 1. Generator module support plate, 2. Generator module, 3. Generator box body, 4. First coupler, 5. Insulating connecting shaft, 6. Epoxy insulating cylinder, 7. Motor box body, 8. Motor module, 9. Motor control unit, 10. Power input terminal, 11. First connection flange, 12. Generator control unit, 13. Power output terminal, 14. Fastening bolt, 15. Motor support bent plate, 16. Motor encapsulation body, 17. Generator encapsulation body, 18. Concentric shaft limiting device, 1801. Concentric rotating shaft, 1802. Support rod, 19. Second coupler, 20. Second connection flange. Specific embodiments

[0024] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] A secondary power electrical isolation device for a high-voltage system, such as Figure 1 shown, includes a motor encapsulation body 16. The motor encapsulation body 16 is connected with an insulating connecting shaft 5. One end of the insulating connecting shaft 5 far away from the motor encapsulation body 16 is connected with a generator encapsulation body 17. An epoxy insulating cylinder 6 is also commonly connected between the generator encapsulation body 17 and the motor encapsulation body 16. The insulating connecting shaft 5 is located at the center of the epoxy insulating cylinder 6.

[0026] Among them, the motor encapsulation body 16 includes a motor box body 7. The motor box body 7 is connected with the epoxy insulating cylinder 6 through a first connection flange 11. Among them, the motor box body 7 and the first connection flange 11 are fixed through a plurality of fastening bolts 14. A motor support bent plate 15 is arranged inside the motor box body 7. The motor support bent plate 15 is arranged on the inner wall of the motor box body 7 at the end far away from the insulating connecting shaft 5. A motor module 8 is arranged on the motor support bent plate 15. The output end of the motor module 8 is connected with the insulating connecting shaft 5 through a first coupler 4. The specific structure is: one end of the first coupler 4 is connected with the output end of the motor module 8, and the other end penetrates through the first connection flange 11 to connect with the insulating connecting shaft 5.

[0027] A motor control unit 9 is also arranged inside the motor box body 7. The motor control unit 9 is electrically connected with the motor module 8; a power input terminal 10 is also arranged on the outer side wall of the motor box body 7, and an external power supply can be connected.

[0028] The generator encapsulation body 17 includes a generator box body 3. The generator box body 3 is connected to the epoxy insulating cylinder 6 through a second connecting flange 20. Among them, the generator box body 3 and the second connecting flange 20 are fixed by a number of fastening bolts 14. Inside the generator box body 3, there is a generator module support plate 1. The generator module support plate 1 is arranged on the inner wall of the generator box body 3 at the end far from the insulating connecting shaft 5. On the generator module support plate 1, there is a generator module 2. The generator module 2 is connected to the insulating connecting shaft 5 through a second coupler 19. The specific structure is: one end of the second coupler 19 is connected to the generator module 2, and the other end passes through the second connecting flange 20 to connect to the insulating connecting shaft 5.

[0029] Inside the generator box body 3, there is also a generator control unit 12. The generator control unit 12 is electrically connected to the generator module 2. On the outer side wall of the generator box body 3, there is also a power output terminal 13, which can supply power to external electrical equipment.

[0030] As Figure 2 shown, a concentric shaft limiting device 18 is fixed at the center of the epoxy insulating cylinder 6. The insulating connecting shaft 5 vertically and movably penetrates through the center of the concentric shaft limiting device 18. The specific structure is: the concentric shaft limiting device 18 includes a concentric rotating shaft 1801. The concentric rotating shaft 1801 is movably sleeved outside the insulating connecting shaft 5. Three support rods 1802 are evenly connected outside the concentric rotating shaft 1801. The other ends of the three support rods 1802 are respectively connected to the inner wall of the epoxy insulating cylinder 6. An activity joint is respectively arranged on each support rod 1802. As Figure 3 shown, similar to a threaded pipe structure, it can carry out micro activities to avoid rigid damage. The concentric shaft limiting device 18 is assembled (or cast) together with the epoxy insulating cylinder 6. Through the activity joints on the support rods 1802, rigid collisions of the insulating connecting shaft 5 during high-speed rotation are avoided, improving the reliability and service life of the insulating connecting shaft 5.

[0031] Its working principle is: the input power supply enters the motor module through the power input terminal 10. The motor module starts, and the free control of the motor speed is realized through the motor control unit 9 to meet the actual requirements. The motor module 8 and the generator module 2 are fixed to the insulating connecting shaft 5 through the first coupler 4 and the second coupler 19. Thus, the rotation of the motor module 8 drives the insulating connecting shaft 5 to rotate, and then drives the generator module 2 to start. Through the internal working mechanism of the generator and the control of the generator control unit 12, the AC-DC 220V power supply output is realized. The output power supply supplies power to electrical equipment through the power output terminal 13. The epoxy insulating cylinder 6 and the insulating connecting shaft 5 play an electrical isolation role between high voltage and low voltage in the whole device, thus ensuring the personal safety of the operator.

[0032] Embodiment 1

[0033] The secondary power electrical isolation device for a high-voltage system, such as Figure 1 As shown, it includes a motor encapsulation body 16. The motor encapsulation body 16 is connected with an insulating connecting shaft 5. One end of the insulating connecting shaft 5 away from the motor encapsulation body 16 is connected with a generator encapsulation body 17. An epoxy insulating cylinder 6 is also commonly connected between the generator encapsulation body 17 and the motor encapsulation body 16. The insulating connecting shaft 5 is located at the center of the epoxy insulating cylinder 6.

[0034] Among them, the motor encapsulation body 16 includes a motor box body 7. The motor box body 7 is connected with the epoxy insulating cylinder 6 through a first connecting flange 11. A motor support bent plate 15 is arranged in the motor box body 7. A motor module 8 is arranged on the motor support bent plate 15. The output end of the motor module 8 is connected with the insulating connecting shaft 5 through a first coupler 4. The specific structure is: one end of the first coupler 4 is connected with the output end of the motor module 8, and the other end passes through the first connecting flange 11 to connect with the insulating connecting shaft 5.

[0035] A motor control unit 9 is also arranged in the motor box body 7. The motor control unit 9 is electrically connected with the motor module 8; a power input end 10 is also arranged on the outer side wall of the motor box body 7, and an external power supply can be connected.

[0036] The generator encapsulation body 17 includes a generator box body 3. The generator box body 3 is connected with the epoxy insulating cylinder 6 through a second connecting flange 20. A generator module support plate 1 is arranged in the generator box body 3. A generator module 2 is arranged on the generator module support plate 1. The generator module 2 is connected with the insulating connecting shaft 5 through a second coupler 19. The specific structure is: one end of the second coupler 19 is connected with the generator module 2, and the other end passes through the second connecting flange 20 to connect with the insulating connecting shaft 5.

[0037] A generator control unit 12 is also arranged in the generator box body 3. The generator control unit 12 is electrically connected with the generator module 2; a power output end 13 is also arranged on the outer side wall of the generator box body 3, and it can supply power to external electrical equipment.

[0038] Such as Figure 2 As shown, a concentric shaft limiting device 18 is fixed at the center of the epoxy insulating cylinder 6. The insulating connecting shaft 5 vertically and movably passes through the center of the concentric shaft limiting device 18.

[0039] Embodiment 2

[0040] The secondary power electrical isolation device for a high-voltage system, such as Figure 1 As shown, it includes a motor encapsulation body 16. The motor encapsulation body 16 is connected with an insulating connecting shaft 5. One end of the insulating connecting shaft 5 away from the motor encapsulation body 16 is connected with a generator encapsulation body 17. An epoxy insulating cylinder 6 is also commonly connected between the generator encapsulation body 17 and the motor encapsulation body 16. The insulating connecting shaft 5 is located at the center of the epoxy insulating cylinder 6.

[0041] As Figure 2 shown, a concentric shaft limiting device 18 is fixed at the center of the epoxy insulating cylinder 6, and the insulating connecting shaft 5 vertically and movably penetrates through the center of the concentric shaft limiting device 18. The specific structure is as follows: The concentric shaft limiting device 18 includes a concentric rotating shaft 1801, and the concentric rotating shaft 1801 is movably sleeved outside the insulating connecting shaft 5. Three support rods 1802 are evenly connected outside the concentric rotating shaft 1801. The other ends of the three support rods 1802 are respectively connected to the inner wall of the epoxy insulating cylinder 6. An activity joint is respectively arranged on each support rod 1802. As Figure 3 shown, it is similar to a threaded pipe structure and can perform micro movements to avoid rigid damage. The concentric shaft limiting device 18 is assembled (or cast) together with the epoxy insulating cylinder 6. The activity joints on the support rods 1802 prevent rigid collisions of the insulating connecting shaft 5 during high-speed rotation, improving the reliability and service life of the insulating connecting shaft 5.

[0042] Embodiment 3

[0043] Its working principle is as follows: The input power supply enters the motor module through the power input terminal 10. The motor module starts, and the free control of the motor speed is realized through the motor control unit 9 to meet the actual requirements. The motor module 8 and the generator module 2 are fixed together with the insulating connecting shaft 5 through the first coupler 4 and the second coupler 19. Thus, the rotation of the motor module 8 drives the rotation of the insulating connecting shaft 5, and then drives the generator module 2 to start. Through the working mechanism inside the generator and the control of the generator control unit 12, the AC-DC 220V power supply output is realized. The output power supply supplies power to electrical equipment through the power output terminal 13. The epoxy insulating cylinder 6 and the insulating connecting shaft 5 play an electrical isolation role between high voltage and low voltage in the whole device, thus ensuring the personal safety of the operator.

Claims

1. Secondary power electrical isolation device for high-voltage system, characterized in that, It includes a motor encapsulation body (16), an insulating connecting shaft (5) is connected to the motor encapsulation body (16), one end of the insulating connecting shaft (5) far from the motor encapsulation body (16) is connected to a generator encapsulation body (17), an epoxy insulating cylinder (6) is also commonly connected between the generator encapsulation body (17) and the motor encapsulation body (16), and the insulating connecting shaft (5) is located at the center of the epoxy insulating cylinder (6); A concentric shaft limiting device (18) is fixed at the center of the epoxy insulating cylinder (6), and the insulating connecting shaft (5) vertically and movably penetrates through the center of the concentric shaft limiting device (18).

2. The secondary power electrical isolation device for a high-voltage system according to claim 1, wherein The motor encapsulation body (16) includes a motor box body (7), the motor box body (7) is connected to the epoxy insulating cylinder (6) through a first connecting flange (11), a motor support bent plate (15) is arranged in the motor box body (7), a motor module (8) is arranged on the motor support bent plate (15), and the output end of the motor module (8) is connected to the insulating connecting shaft (5) through a first coupler (4); A motor control unit (9) is also arranged in the motor box body (7), and the motor control unit (9) is electrically connected to the motor module (8); A power input terminal (10) is also arranged on the outer side wall of the motor box body (7).

3. The secondary power electrical isolation device for a high-voltage system according to claim 2, characterized in that, The generator encapsulation body (17) includes a generator box body (3), the generator box body (3) is connected to the epoxy insulating cylinder (6) through a second connecting flange (20), a generator module support plate (1) is arranged in the generator box body (3), a generator module (2) is arranged on the generator module support plate (1), and the generator module (2) is connected to the insulating connecting shaft (5) through a second coupler (19); A generator control unit (12) is also arranged in the generator box body (3), and the generator control unit (12) is electrically connected to the generator module (2); A power output terminal (13) is also arranged on the outer side wall of the generator box body (3).

4. The secondary power electrical isolation device for a high-voltage system according to claim 3, characterized in that, Both between the motor box body (7) and the first connecting flange (11) and between the generator box body (3) and the second connecting flange (20) are fixed by a plurality of fastening bolts (14).

5. The secondary power electrical isolation device for a high-voltage system according to claim 3, characterized in that, The generator module support plate (1) is arranged on the inner wall of the generator box body (3) at the end far from the insulating connecting shaft (5), and the motor support bent plate (15) is arranged on the inner wall of the motor box body (7) at the end far from the insulating connecting shaft (5).

6. The secondary power electrical isolation device for a high-voltage system according to claim 3, characterized in that, One end of the first coupler (4) is connected to the output end of the motor module (8), and the other end penetrates through the first connecting flange (11) to connect to the insulating connecting shaft (5), and one end of the second coupler (19) is connected to the generator module (2), and the other end penetrates through the second connecting flange (20) to connect to the insulating connecting shaft (5).

7. The secondary power electrical isolation device for a high-voltage system according to claim 1, characterized in that, The concentric shaft limiting device (18) includes a concentric rotating shaft (1801), the concentric rotating shaft (1801) is movably sleeved outside the insulating connecting shaft (5), three support rods (1802) are evenly connected outside the concentric rotating shaft (1801), the other ends of the three support rods (1802) are respectively connected to the inner wall of the epoxy insulating cylinder (6), and each support rod (1802) is respectively provided with a movable joint.

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