Solid-sealed polar pole for medium-voltage vacuum circuit breaker

Abstract

The utility model discloses a solid-sealed polar pole for a medium-voltage vacuum circuit breaker, which relates to the technical field of vacuum circuit breakers and comprises a bottom plate, a polar pole body is arranged above the bottom plate, a clamping groove is formed in one side of the polar pole body, an installation groove is formed in the top of the bottom plate, and a through groove is formed in the side face of the installation groove. A trapezoidal clamping block is slidably connected to the interior of the through groove, the trapezoidal clamping block is connected with the clamping groove in an inserted mode, an operating rod is fixedly connected to the side, away from the clamping groove, of the trapezoidal clamping block, and a round cap is fixedly connected to one side of the operating rod; according to the utility model, through the plug-in design of the trapezoidal clamping block and the clamping groove, the complicated bolt tightening operation by using a tool is not needed, and the connection between the pole and the bottom plate can be realized by only pressing the pole body, so that the installation time is shortened, the installation efficiency is improved, and only the round cap needs to be pulled to enable the trapezoidal clamping block to be separated from the clamping groove during disassembly; and the maintenance cost caused by damage of connecting parts is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breaker technology, specifically a solid-sealed pole for a medium-voltage vacuum circuit breaker. Background Technology

[0002] Medium-voltage vacuum circuit breakers are widely used in power systems. Solid-sealed poles, as key components, require stable and reliable operation during installation and maintenance. Traditionally, solid-sealed poles are connected to circuit breakers via bolts or welding. Bolted connections are cumbersome to install and disassemble, consuming time and manpower. Furthermore, repeated disassembly can lead to loose bolts and damage to welded joints, affecting the circuit breaker's performance and lifespan. Welded connections, on the other hand, are difficult to disassemble and prone to damaging components.

[0003] To address this issue, we designed a solid-sealed pole for a medium-voltage vacuum circuit breaker. Utility Model Content

[0004] The purpose of this invention is to provide a solid-sealed pole for a medium-voltage vacuum circuit breaker to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a solid-sealed pole for a medium-voltage vacuum circuit breaker, including a base plate, a pole body on the top of the base plate, a slot on one side of the pole body, an installation groove on the top of the base plate, a through groove on the side of the installation groove, a trapezoidal block slidably connected inside the through groove, the trapezoidal block being inserted into the slot, an operating rod fixedly connected to the side of the trapezoidal block away from the slot, a round cap fixedly connected to one side of the operating rod, and a return spring fixedly connected between the round cap and one side of the pole body.

[0006] Furthermore, a sealing collar is fixedly connected to the top of the base plate, and the sealing collar is slidably connected to the pole body.

[0007] Furthermore, a vacuum interrupter is installed inside the pole body, a conductive rod is fixedly connected to the bottom wall of the mounting groove, a plug is fixedly connected to the top of the conductive rod, a connection hole is opened at the bottom of the vacuum interrupter, a guide tube is sleeved outside the connection hole, the guide tube is fixedly installed at the bottom of the vacuum interrupter, and the plug is inserted into the vacuum interrupter.

[0008] Furthermore, the bottom of the mounting groove is connected to a sliding groove, a support ring is slidably connected to the side wall of the sliding groove, the bottom of the pole body contacts the top of the support ring, and a buffer spring is fixedly connected between the sliding groove and the support ring.

[0009] Furthermore, both the slide groove and the support ring are annular, and the buffer springs are arranged in a circular array on the bottom wall of the slide groove, with a quantity of four.

[0010] Furthermore, the outer material of the pole body is epoxy resin, and the support ring is made of polytetrafluoroethylene.

[0011] Furthermore, the bottom of the pole body is symmetrically connected with guide rods, and the top of the support ring is provided with a guide groove that cooperates with the guide rods, and the guide groove is inserted into the guide rods.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. With the trapezoidal locking block and slot insertion design, there is no need to use tools for tedious bolt tightening operations. The connection between the pole and the base plate can be achieved simply by pressing down on the pole body, which shortens the installation time and improves the installation efficiency. When disassembling, simply pull the round cap to make the trapezoidal locking block disengage from the slot, which reduces maintenance costs caused by damage to the connecting parts.

[0014] 2. By cooperating with the guide rod and guide groove, the positional accuracy of the pole body is improved, preventing lateral or rotational displacement and enhancing the overall stability of the solidified pole body structure. The epoxy resin material on the outside of the pole body insulates the internal conductive rod and vacuum interrupter from the outside, preventing leakage and ensuring the safety and stability of the electrical system. The sealing collar seals the connection between the base plate and the pole body, preventing external dust, moisture, and contaminants from entering the solidified pole body and reducing damage to key components such as the vacuum interrupter and conductive rod. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a diagram showing the pole body and base plate of this utility model not being engaged.

[0017] Figure 3 This is a partial sectional view of the pole body and the base plate of this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged diagram of point A in the middle.

[0019] In the diagram: 1. Pole post body; 2. Base plate; 3. Sealing collar; 4. Support ring; 5. Slide groove; 6. Buffer spring; 7. Conductive rod; 8. Vacuum interrupter; 9. Guide tube; 10. Connecting hole; 11. Plug; 12. Through groove; 13. Operating rod; 14. Slot; 15. Trapezoidal block; 16. Round cap; 17. Return spring; 18. Guide groove; 19. Guide rod; 20. Mounting groove. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a solid-sealed pole for a medium-voltage vacuum circuit breaker, including a base plate 2, a pole body 1 above the base plate 2, a slot 14 on one side of the pole body 1, an installation groove 20 on the top of the base plate 2, a through groove 12 on the side of the installation groove 20, a trapezoidal block 15 slidably connected inside the through groove 12, the side of the trapezoidal block 15 near the pole body 1 being inclined, the trapezoidal block 15 being inserted into the slot 14, an operating rod 13 being fixedly connected to the side of the trapezoidal block 15 away from the slot 14, a round cap 16 being fixedly connected to one side of the operating rod 13, and a return spring 17 being fixedly connected between the round cap 16 and one side of the pole body 1.

[0022] In practice, align the bottom of the pole body 1 with the mounting groove 20, and then press down on the pole body 1. At this time, the outer side of the pole body 1 slides against the trapezoidal locking block 15, causing the trapezoidal locking block 15 to slide towards the round cap 16 inside the through groove 12. At this time, the return spring 17 is compressed and contracted until the slot 14 moves to a position flush with the trapezoidal locking block 15. The trapezoidal locking block 15 is no longer obstructed, and the return spring 17 will use its own elasticity to make the trapezoidal locking block 15 lock into the inside of the slot 14. The pole body 1 can be installed without the need for the operator to use tools. When the operator needs to remove the pole body 1, pull the round cap 16 outward. At this time, the trapezoidal locking block 15 will no longer be located inside the slot 14, and the operator can then remove the pole body 1.

[0023] See Figure 2 As shown, a sealing ring 3 is fixedly connected to the top of the base plate 2. The sealing ring 3 is slidably connected to the pole body 1. By setting the sealing ring 3, the connection between the base plate 2 and the pole body 1 is sealed to prevent external dust, moisture, pollutants and other contaminants from entering the solidified pole body. This reduces the damage caused by impurities to key components such as the vacuum interrupter 8 and the conductive rod 7, thereby ensuring the normal operation of the medium-voltage vacuum circuit breaker.

[0024] See Figure 3The electrode body 1 houses a vacuum interrupter 8. A conductive rod 7 is fixedly connected to the bottom wall of the mounting groove 20. The external circuit forms a closed loop through the conductive rod 7 and the contacts, allowing for normal power transmission. A plug 11 is fixedly connected to the top of the conductive rod 7. A connection hole 10 is provided at the bottom of the vacuum interrupter 8. A guide tube 9 is fitted over the connection hole 10 and is fixedly installed at the bottom of the vacuum interrupter 8. The guide tube 9 provides guidance when the plug 11 is inserted into the connection hole 10 and also provides a certain degree of protection for the connection structure between the connection hole 10 and the plug 11, preventing damage to the connection structure due to uneven force or external forces during the connection process. The plug 11 is inserted into the vacuum interrupter 8 through the connection hole 10. When plug 11 is inserted into connection hole 10, current flows through conductive rod 7, through the contact interface between plug 11 and connection hole 10, and is conducted to conductive components such as electrodes inside vacuum interrupter 8. When the medium-voltage vacuum circuit breaker is working normally, when the circuit needs to be cut off, an electric arc is generated momentarily when the contacts connected in series with the circuit separate. Since the vacuum interrupter 8 is a high vacuum environment, electrons will move from one electrode to another in the high vacuum environment. Charged particles in the arc will rapidly diffuse and be adsorbed by the metal shield in the vacuum environment, so that the arc is extinguished in a very short time. This can effectively cut off the circuit, prevent long-term arc discharge when the circuit is faulty, and protect the safety of the power system.

[0025] See Figure 3 The bottom of the mounting groove 20 is connected to a sliding groove 5. A support ring 4 is slidably connected to the side wall of the sliding groove 5. The bottom of the pole body 1 contacts the top of the support ring 4. A buffer spring 6 is fixedly connected between the sliding groove 5 and the support ring 4. When the pole body 1 is installed on the top of the base plate 2, the bottom of the pole body 1 contacts the top of the support ring 4 and drives the support ring 4 to slide inside the sliding groove 5. At this time, the buffer spring 6 is compressed and contracted. When the pole body 1 is subjected to external impact force or vibration during operation, the buffer spring 6 can absorb and buffer this energy. When the pole body 1 is disassembled, since the trapezoidal locking block 15 is released from the restriction of the locking groove 14, the buffer spring 6 releases elastic potential energy and bounces the pole body 1 upward, completing the disassembly of the pole body 1.

[0026] See Figure 3 Both the slide groove 5 and the support ring 4 are annular. The annular design can provide stable support in all directions, avoiding tilting or displacement of the pole body 1 due to uneven force, and improving the stability and reliability of the overall structure of the solidified pole. The buffer springs 6 are arranged in a ring array on the bottom wall of the slide groove 5, and there are four of them. This is beneficial for buffering the impact force and vibration in different directions, and providing balanced buffering and support for the pole body 1.

[0027] See Figure 3The outer material of the pole body 1 is epoxy resin, which has insulating properties and insulates the internal conductive rod 7 and vacuum interrupter 8 from the outside world, preventing leakage and ensuring the safety and stability of the electrical system. At the same time, epoxy resin also has a certain mechanical strength and can withstand the mechanical stress of the external environment and the force of the internal components. The support ring 4 is made of polytetrafluoroethylene, whose insulating properties prevent leakage at the location of the support ring 4. The low coefficient of friction of polytetrafluoroethylene ensures the smooth sliding of the support ring 4 in the slide groove 5, reduces friction loss, and improves the performance and service life of the overall structure.

[0028] See Figure 2 The bottom of the pole body 1 is symmetrically connected with guide rods 19, and the top of the support ring 4 is provided with a guide groove 18 that cooperates with the guide rods 19. The guide groove 18 is inserted into the guide rods 19. During the installation, disassembly or operation of the pole body 1, the movement of the guide rods 19 along the guide groove 18 can ensure the positional accuracy of the pole body 1, prevent it from shifting laterally or rotating, and improve the accuracy and stability of the overall structure.

[0029] Working principle:

[0030] Align the bottom of the pole body 1 with the mounting groove 20 on the base plate 2, and slowly press down the pole body 1. At this time, the guide rod 19 is inserted into the guide groove 18, and the outer side of the pole body 1 contacts the inclined surface of the trapezoidal locking block 15. As the pole body 1 continues to be pressed down, the trapezoidal locking block 15 will slide towards the round cap 16 inside the through groove 12. The return spring 17 is compressed and contracted. When the pole body 1 is pressed down and the locking groove 14 moves to a position flush with the trapezoidal locking block 15, the trapezoidal locking block 15 is no longer blocked by the outer side of the pole body 1. Under the elastic force of the return spring 17, the trapezoidal locking block 15 quickly locks into the locking groove 14, thereby fixing the pole body 1 and the base plate 2 in the horizontal direction. The sealing ring 3 at the top of the base plate 2 seals the connection between the base plate 2 and the pole body 1 to prevent external dust, moisture, pollutants, etc. from entering the solidified pole body.

[0031] Meanwhile, the bottom of the pole body 1 contacts the top of the support ring 4. Due to the downward pressure of the pole body 1, the support ring 4 slides inside the slide groove 5, and the buffer spring 6 is compressed and contracted. When the buffer spring 6 reaches the equilibrium state, it provides an upward support force to the pole body 1 through its elastic force. Together with the snap-fit ​​fixation of the trapezoidal clip 15, it ensures the stable installation of the pole body 1. During the installation of the pole body 1, the plug 11 at the top of the conductive rod 7 on the bottom wall of the mounting groove 20 is inserted into the connection hole 10 at the bottom of the vacuum interrupter 8. During the insertion process, the guide tube 9 outside the connection hole 10 provides guidance for the plug 11 to ensure that the plug 11 is accurately inserted.

[0032] After the plug 11 is inserted into the connection hole 10, the current passes through the conductive rod 7, through the contact interface between the plug 11 and the connection hole 10, and is conducted to the electrodes and other conductive components inside the vacuum interrupter 8, completing the electrical connection. This allows the external circuit to form a closed loop through the conductive rod 7 and the contacts inside the vacuum interrupter 8, preparing for the normal transmission of electrical energy.

[0033] When the staff needs to disassemble the pole body 1, they first manually pull the round cap 16. The round cap 16 drives the operating rod 13, causing the trapezoidal locking block 15 to slide away from the slot 14 in the through groove 12 until the trapezoidal locking block 15 is completely disengaged from the slot 14. This releases the horizontal fixation between the pole body 1 and the base plate 2. The previously compressed buffer spring 6 releases its elastic potential energy, causing the pole body 1 to spring upward. The plug 11 at the top of the conductive rod 7 is pulled out from the connection hole 10 at the bottom of the vacuum interrupter 8, disconnecting the electrical connection. The pole body 1 and the base plate 2 are completely separated, thus completing the disassembly.

Claims

1. A solid-sealed pole for a medium-voltage vacuum circuit breaker, comprising a base plate (2), wherein a pole body (1) is disposed above the base plate (2), characterized in that, The pole body (1) has a slot (14) on one side, the base plate (2) has an installation slot (20) on the top, the installation slot (20) has a through slot (12) on the side, a trapezoidal block (15) is slidably connected inside the through slot (12), the trapezoidal block (15) is inserted into the slot (14), an operating rod (13) is fixedly connected to the side of the trapezoidal block (15) away from the slot (14), a round cap (16) is fixedly connected to one side of the operating rod (13), and a return spring (17) is fixedly connected between the round cap (16) and one side of the pole body (1).

2. The solid-sealed pole for a medium-voltage vacuum circuit breaker as described in claim 1, characterized in that: A sealing ring (3) is fixedly connected to the top of the base plate (2), and the sealing ring (3) is slidably connected to the pole body (1).

3. A solid-sealed pole for a medium-voltage vacuum circuit breaker as described in claim 1, characterized in that: The pole body (1) is equipped with a vacuum interrupter (8). A conductive rod (7) is fixedly connected to the bottom wall of the mounting groove (20). A plug (11) is fixedly connected to the top of the conductive rod (7). A connection hole (10) is opened at the bottom of the vacuum interrupter (8). A guide tube (9) is sleeved on the outside of the connection hole (10). The guide tube (9) is fixedly installed at the bottom of the vacuum interrupter (8). The plug (11) is inserted into the vacuum interrupter (8).

4. A solid-sealed pole for a medium-voltage vacuum circuit breaker as described in claim 3, characterized in that: The bottom of the mounting groove (20) is connected to a sliding groove (5), and a support ring (4) is slidably connected to the side wall of the sliding groove (5). The bottom of the pole body (1) is in contact with the top of the support ring (4), and a buffer spring (6) is fixedly connected between the sliding groove (5) and the support ring (4).

5. A solid-sealed pole for a medium-voltage vacuum circuit breaker as described in claim 4, characterized in that: Both the slide groove (5) and the support ring (4) are annular, and the buffer springs (6) are arranged in a circular array on the bottom wall of the slide groove (5) in four quantities.

6. A solid-sealed pole for a medium-voltage vacuum circuit breaker as described in claim 4, characterized in that: The outer material of the pole body (1) is epoxy resin, and the support ring (4) is made of polytetrafluoroethylene.

7. A solid-sealed pole for a medium-voltage vacuum circuit breaker as described in claim 6, characterized in that: The bottom of the pole body (1) is symmetrically connected with guide rods (19), and the top of the support ring (4) is provided with a guide groove (18) that cooperates with the guide rods (19). The guide groove (18) is inserted into the guide rods (19).

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