Adjustable vacuum circuit breaker arc chamber structure

Abstract

The utility model relates to an adjustable arc extinguishing chamber structure of pole vacuum circuit breaker, aims at solving the current through manual adjustment first contact and second contact distance, because the distance of second contact movement is fixed, and then needs to carry out energization when power off, still needs personnel manual first contact to adjust to the position that can contact with second contact, the technical problem that is more inconvenient, including: the insulating shell, the upper insulating end cover and lower insulating end cover are sealed and installed on the both ends opening, the upper insulating end cover and lower insulating end cover middle part all slide and penetrate fixed electrically conductive rod and movable electrically conductive rod, and the opposite end of two rods is fixedly connected first contact and second contact respectively, the utility model passes through the synchronous drive screw rod rotation of double-shaft motor, makes fixed electrically conductive rod and movable electrically conductive rod with the moving speed of uniform speed synchronous axial relative or opposite movement, can realize the dynamic calibration of contact spacing without manual intervention, solves the problem that traditional manual adjustment is inconvenient and precision is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breaker arc-extinguishing chamber technology, specifically an adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure. Background Technology

[0002] The pole-mounted vacuum circuit breaker is named for its high vacuum nature, which is both the arc-extinguishing medium and the insulating medium between the contacts after arc extinguishing. It has the advantages of small size, light weight, and suitability for frequent operation, and is widely used in power distribution networks.

[0003] According to publicly available patent CN222775226U, an adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure includes an insulating shell, an upper insulating end cover fixed to the upper end of the insulating shell, a fixed conductive rod extending into the insulating shell on the upper insulating end cover, an up-and-down adjustment mechanism for driving the fixed conductive rod to move up and down on the upper insulating end cover, a first contact fixed to the bottom of the fixed conductive rod, a lower insulating end cover fixed to the lower end of the insulating shell, a stainless steel bellows fixed to the upper side of the lower insulating end cover, a movable conductive rod penetrating the stainless steel bellows installed on the lower insulating end cover, the movable conductive rod slidingly contacting the lower insulating end cover and the stainless steel bellows respectively, an opening and closing mechanism for driving the movable conductive rod to move up and down on the lower insulating end cover, and a second contact fixed to the upper end of the movable conductive rod. In the process of realizing this utility model, the inventor... The existing technology has at least the following unresolved problems: When power is off, the opening and closing mechanism moves the moving conductive rod downwards, separating the second contact from the first contact; when power is on, the opening and closing mechanism moves the moving conductive rod upwards, bringing the second contact into contact with the first contact. However, when the fire extinguishing effect is insufficient, rotating the handle rotates the threaded sleeve, which in turn moves the fixed conductive rod up and down, thus moving the first contact up and down to adjust the maximum distance between the first and second contacts. In practice, this is done manually. Since the distance the second contact moves is fixed, when power is restored after a power outage, personnel still need to manually adjust the first contact to a position where it can contact the second contact, which is inconvenient. Therefore, a new technical solution is needed to address these issues. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide an adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure to solve the technical problem that the current method of manually adjusting the distance between the first and second contacts is inconvenient because the distance the second contact moves is fixed. As a result, when power is restored after a power outage, personnel still need to manually adjust the first contact to a position where it can contact the second contact.

[0005] To achieve the objective of this utility model, the technical solution adopted is as follows: An adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure is designed, comprising:

[0006] An insulating shell has an upper insulating end cap and a lower insulating end cap sealed at its two ends. A fixed conductive rod and a movable conductive rod slide through the middle of the upper insulating end cap and the opposite ends of the two rods are respectively fixedly connected to the first contact and the second contact.

[0007] An adjustment mechanism, disposed outside the insulating housing, is used to drive the fixed conductive rod and the movable conductive rod to perform axial relative movement. The adjustment mechanism includes:

[0008] A dual-axis motor is fixedly installed on the outer middle part of an insulating housing, and both drive ends of the dual-axis motor are connected to lead screws via couplings.

[0009] Two fixed disks are respectively fixedly connected to one side of the fixed conductive rod and the moving conductive rod, and the two fixed disks are respectively threaded onto the outside of the lead screw.

[0010] Preferably, a first telescopic corrugated tube is sleeved on the outer side of both the fixed conductive rod and the movable conductive rod, and the two ends of the first telescopic corrugated tube are welded to the fixed plate and the end cap, respectively.

[0011] Preferably, a slide rod is fixedly connected to the side of the insulating housing away from the dual-axis motor via a connecting rod, and the slide rod and the lead screw are symmetrically distributed, with both fixed discs slidably sleeved on the outside of the slide rod.

[0012] Preferably, both ends of the slide rod and the ends of the two lead screws away from the dual-axis motor are fixedly connected to a limiting plate, and the size of the limiting plate is larger than the size of the slide rod and the lead screw.

[0013] Preferably, a second telescopic bellows is sleeved on the outer side of both the slide rod and the lead rod, and the inner diameter of the second telescopic bellows is larger than the outer diameter of the slide rod and the lead rod.

[0014] Preferably, the first telescopic corrugated pipe is made of stainless steel by spinning, and the wall thickness of the first telescopic corrugated pipe is 0.1-0.5mm, and the crest height is 5-15mm.

[0015] Preferably, the second telescopic corrugated tube is made of silicone rubber and manufactured by injection molding. The second telescopic corrugated tube has a Shore hardness of 50-80HA, a wall thickness of 1-3mm, and a crest height of 8-20mm.

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

[0017] 1. Automatic calibration: The lead screw is synchronously driven by a dual-axis motor to rotate, so that the fixed conductive rod and the moving conductive rod move synchronously in opposite directions at a uniform speed. Dynamic calibration of the contact gap can be achieved without manual intervention, solving the problems of inconvenience and insufficient accuracy of traditional manual adjustment.

[0018] 2. Dynamic optimization of arc extinguishing performance: The spacing between the contacts can be adjusted in real time through the adjustment mechanism. When the arc extinguishing effect is not good, the distance between the first and second contacts is increased. Since the first and second contacts move in opposite directions synchronously, the speed of contact spacing adjustment is increased, which further improves the rapid breaking capability of the vacuum arc extinguishing chamber, shortens the arc burning time, significantly improves arc extinguishing reliability, and reduces contact erosion loss. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0021] Figure 3 This is an enlarged view of section A of this utility model.

[0022] In the diagram: 1. Insulating shell; 11. Upper insulating end cap; 12. Lower insulating end cap; 2. Dual-axis motor; 21. Lead screw; 22. Fixed plate; 3. Sliding rod; 31. Limiting plate; 4. First telescopic bellows; 5. Fixed conductive rod; 51. First contact; 6. Moving conductive rod; 62. Second contact; 7. Second telescopic bellows. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Example 1: An adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure, see [link to example]. Figures 1 to 3 ,include:

[0025] An insulating shell 1 has an upper insulating end cap 11 and a lower insulating end cap 12 sealed at its two ends. A fixed conductive rod 5 and a movable conductive rod 6 are slidably passed through the middle of the upper insulating end cap 11 and the lower insulating end cap 12, and the opposite ends of the two rods are respectively fixedly connected to the first contact 51 and the second contact 62.

[0026] An adjustment mechanism, disposed outside the insulating housing 1, is used to drive the fixed conductive rod 5 and the movable conductive rod 6 to perform axial relative movement. The adjustment mechanism includes:

[0027] A dual-axis motor 2 is fixedly installed on the outer middle part of the insulating housing 1, and both drive ends of the dual-axis motor 2 are connected to lead screws 21 through couplings.

[0028] Two fixed disks 22 are respectively fixedly connected to one side of the fixed conductive rod 5 and the movable conductive rod 6, and the two fixed disks 22 are respectively threaded onto the outside of the lead screw 21.

[0029] This device, through its adjustable mechanism, achieves the following during use:

[0030] Automatic calibration: The lead screw 21 is synchronously driven to rotate by the dual-axis motor 2, so that the fixed conductive rod 5 and the moving conductive rod 6 move synchronously in opposite directions at a uniform speed. Dynamic calibration of the contact gap can be achieved without manual intervention, solving the problems of inconvenience and insufficient accuracy of traditional manual adjustment.

[0031] Dynamic optimization of arc extinguishing performance: The spacing between contacts can be adjusted in real time through the adjustment mechanism. When the arc extinguishing effect is not good, the distance between the first contact 51 and the second contact 62 is increased. Since the first contact 51 and the second contact 62 move synchronously and in opposite directions, the speed of contact spacing adjustment is increased, which further improves the rapid breaking capability of the vacuum arc extinguishing chamber, shortens the arc burning time, significantly improves the arc extinguishing reliability, and reduces contact erosion loss.

[0032] For details, see Figure 1 Both the fixed conductive rod 5 and the moving conductive rod 6 are fitted with a first telescopic bellows 4 on their outer sides. The two ends of the first telescopic bellows 4 are welded to the fixed plate 22 and the end cap, respectively. The first telescopic bellows 4 is made of stainless steel by spinning. The wall thickness of the first telescopic bellows 4 is 0.1-0.5mm and the crest height is 5-15mm. The first telescopic bellows 4 can extend and retract when it moves axially with the fixed plate 22. The welding and sealing of the two ends with the end cap and the fixed plate 22 ensures that the high vacuum inside the insulating shell 1 is not affected by the adjustment movement. In addition, the stainless steel first telescopic bellows 4 improves corrosion resistance and extends service life.

[0033] Further, see Figure 2 The insulating shell 1 is fixedly connected to a slide rod 3 on the side away from the dual-axis motor 2 via a connecting rod. The slide rod 3 and the lead screw 21 are symmetrically distributed. Both fixed discs 22 are slidably sleeved on the outside of the slide rod 3. The slide rod 3 not only guides the movement of the fixed discs 22 and improves the stability of the movement, but also bears the radial load during the adjustment process, reduces the lateral force on the lead screw 21, reduces the wear rate of the lead screw 21, and further extends the service life of the lead screw 21 structure.

[0034] It is worth noting that, see Figure 2Both ends of the slide rod 3 and the ends of the two lead screws 21 away from the dual-axis motor 2 are fixedly connected to the limiting plate 31. The size of the limiting plate 31 is larger than the size of the slide rod 3 and the lead screw 21. By setting the limiting plate 31, the distance that the fixed plate 22 can move can be limited, and the fixed plate 22 can be prevented from moving away from the lead screw 21, thus affecting the adjustment of the contact spacing.

[0035] It is worth noting that, see Figure 3 The outer sides of both the slide rod 3 and the lead screw 21 are fitted with second telescopic bellows 7. The inner diameter of the second telescopic bellows 7 is larger than the outer diameter of the slide rod 3 and the lead screw 21. The second telescopic bellows 7 is made of silicone rubber and is manufactured by injection molding. The second telescopic bellows 7 has a Shore hardness of 50-80HA, a wall thickness of 1-3mm, and a crest height of 8-20mm. The second telescopic bellows 7 can extend and retract as the fixed plate 22 moves axially, thereby protecting the slide rod 3 and the lead screw 21 from all sides. This not only extends the service life of the slide rod 3 and the lead screw 21, but also prevents impurities from sticking to the surface of the lead screw 21 and affecting the position adjustment of the fixed plate 22. In addition, the silicone rubber second telescopic bellows 7 has strong corrosion resistance, further extending the service life of the second telescopic bellows 7.

[0036] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0037] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. An adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure, characterized in that, include: An insulating shell (1) has an upper insulating end cap (11) and a lower insulating end cap (12) sealed at its two ends. A fixed conductive rod (5) and a movable conductive rod (6) slide through the middle of the upper insulating end cap (11) and the lower insulating end cap (12), and the opposite ends of the two rods are respectively fixedly connected to the first contact (51) and the second contact (62). An adjustment mechanism, disposed outside the insulating housing (1), is used to drive the fixed conductive rod (5) and the movable conductive rod (6) to perform axial relative movement. The adjustment mechanism includes: A dual-axis motor (2) is fixedly installed on the outer middle part of the insulating shell (1). Both drive ends of the dual-axis motor (2) are connected to lead screws (21) through couplings. Two fixed disks (22) are respectively fixedly connected to one side of the fixed conductive rod (5) and the moving conductive rod (6), and the two fixed disks (22) are respectively threaded onto the outside of the lead screw (21).

2. The adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure as described in claim 1, characterized in that, The outer sides of both the fixed conductive rod (5) and the moving conductive rod (6) are fitted with a first telescopic corrugated tube (4), and the two ends of the first telescopic corrugated tube (4) are welded to the fixed plate (22) and the end cap, respectively.

3. The adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure as described in claim 1, characterized in that, The insulating shell (1) is fixedly connected to a slide rod (3) on the side away from the dual-axis motor (2) by a connecting rod, and the slide rod (3) and the lead screw (21) are symmetrically distributed. The two fixed discs (22) are slidably sleeved on the outside of the slide rod (3).

4. The adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure as described in claim 3, characterized in that, Both ends of the slide rod (3) and the ends of the two lead screws (21) away from the dual-axis motor (2) are fixedly connected to a limiting plate (31), and the size of the limiting plate (31) is larger than the size of the slide rod (3) and the lead screw (21).

5. The adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure as described in claim 4, characterized in that, The outer sides of both the slide rod (3) and the lead screw (21) are fitted with a second telescopic bellows (7), the inner diameter of which is larger than the outer diameter of the slide rod (3) and the lead screw (21).

6. The adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure as described in claim 2, characterized in that, The first telescopic corrugated pipe (4) is made of stainless steel by spinning. The wall thickness of the first telescopic corrugated pipe (4) is 0.1-0.5mm and the peak height is 5-15mm.

7. The adjustable pole-mounted vacuum circuit breaker arc-extinguishing chamber structure as described in claim 5, characterized in that, The second telescopic corrugated tube (7) is made of silicone rubber by injection molding. The Shore hardness of the second telescopic corrugated tube (7) is 50-80HA, the wall thickness is 1-3mm, and the crest height is 8-20mm.

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