An inner-surface anodized aluminum outlet block and method of use thereof

Abstract

This invention relates to an aluminum terminal block with an anodized inner surface and its usage method, comprising an insulating tube and a horizontally arranged aluminum base. One end of the aluminum base has a circular countersunk hole, which is connected to a stationary support by bolts. The other end of the aluminum base has a positioning countersunk hole. One end of the insulating tube is fixedly connected to a support tube inserted into the positioning countersunk hole. Multiple base vent holes are formed on the circumferential surface of the aluminum base. An inner sleeve is axially connected to the circular countersunk hole. Multiple sleeve vent holes are formed on the inner sleeve, which are arranged radially inclined. A filter screen is fixedly connected to the inner wall of the inner sleeve. An impurity discharge hole connecting the positioning countersunk hole and the circular countersunk hole is formed on the aluminum base. An oxide film is formed on the outer surface of the filter screen and the inner wall of the inner sleeve. By forming an oxide film, high-temperature gas damage to the aluminum terminal block is avoided, and debris generated during contact separation and bonding can be collected to prevent it from affecting the insulation of surrounding components.

Description

Technical Field

[0001] This invention relates to the field of circuit breakers, specifically to an aluminum terminal block with an anodized inner surface and its usage method. Background Technology

[0002] Circuit breakers, with their arc-extinguishing chambers at their core, involve a comprehensive understanding of multiple disciplines, including gas dynamics, mechanical transmission control, and high-voltage insulation. Currently, the vast majority of mainstream high-voltage SF6 circuit breakers on the market utilize variable-pitch arc-extinguishing chambers. These chambers are broadly categorized into self-energized and compressed-air types. Compressed-air type arc-extinguishing chambers have high breaking capacity but require a large operating mechanism, relying on mechanical compression to establish arc-extinguishing pressure, resulting in high costs. Self-energized arc-extinguishing chambers, when interrupting large currents, primarily rely on arc energy to establish arc-extinguishing pressure, employing the principles of thermal expansion and auxiliary compressed air. Therefore, they require less operating power, making the use of lightweight spring operating mechanisms feasible.

[0003] When an electric arc burns, the arc temperature is very high (the arc column temperature can reach 6000℃ and above). Under the influence of high temperature, gas molecules collide with each other due to intense thermal motion and become ionized. During the arc blowing process, the high-temperature gas often affects the surrounding aluminum alloy components, and the debris generated during the contact separation and reconnection process is blown out with the gas, affecting the insulation of surrounding components. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an aluminum terminal block with an anodized inner surface and its usage method.

[0005] This invention is achieved through the following technical solution: providing an aluminum outlet seat with an anodized inner surface, comprising a fixed insulating tube and a horizontally arranged aluminum base. One end of the aluminum base has a circular countersunk hole, which is connected to a stationary support via bolts, and the circular countersunk hole communicates with the vent hole of the stationary support. The other end of the aluminum base has a positioning countersunk hole. One end of the insulating tube is fixedly connected to a support tube inserted into the positioning countersunk hole. Multiple base vent holes are formed on the circumferential surface of the aluminum base. An inner sleeve is axially connected to the circular countersunk hole. Multiple sleeve vent holes are formed on the inner sleeve, which are arranged radially inclined. A filter screen is fixedly connected to the inner wall of the inner sleeve. An impurity discharge hole communicating with the positioning countersunk hole and the circular countersunk hole is formed on the aluminum base. The impurity discharge hole is adapted to the lower edge of the filter screen. An oxide film is formed on the outer surface of the filter screen and the inner wall of the inner sleeve.

[0006] The oxide film in this design is a dense anodic oxide film, which greatly improves the surface hardness, corrosion resistance, and wear resistance of the filter ring and inner sleeve. When the circuit breaker is tripped, the high-speed, high-temperature SF6 gas jet from the nozzle leaves the outlet seat. Due to the presence of the anodic oxide film, the high-temperature gas avoids damaging the aluminum outlet seat. When the gas passes through the sleeve exhaust hole, the impurity powder is filtered by the filter ring and remains inside the filter ring. The gas passes through the inclined sleeve exhaust hole, thereby driving the inner sleeve to rotate, causing the impurity powder attached to the filter ring to fall to the lower layer of the filter ring. Some of the gas is blown into the positioning countersink through the impurity discharge hole and carries the impurity powder from the lower layer of the filter ring into the positioning countersink.

[0007] As an optimization, a flow guide cone is fixed to the bottom of the circular countersunk hole of the aluminum base. The flow guide cone diverts the high-temperature SF6 gas, preventing the high-speed, high-temperature SF6 gas flow from directly and vertically impacting the bottom surface of the circular countersunk hole.

[0008] As an optimization, a mounting flange is provided between the insulating tube and the aluminum base. The mounting flange has a countersunk hole at the end facing the insulating tube, and an annular support flange is fixedly connected within the countersunk hole. The insulating tube is inserted between the support flange and the countersunk hole, and the support tube is fixed to the side of the mounting flange facing the aluminum base. The connection between the insulating tube and the aluminum base is achieved through the support flange and the mounting flange.

[0009] As an optimization, an impurity retention slit is left between the end of the support tube and the bottom of the positioning countersunk hole, and a filter screen is installed inside the support tube. The impurity retention slit and filter screen in this design retain the impurity powder blown out of the impurity discharge hole at the impurity retention slit and filter screen.

[0010] As an optimization, a baffle plate covering the outer ring of the mounting flange is fixedly connected to the mounting flange. In this design, the baffle plate protects the mounting flange.

[0011] As an optimization, the inner sleeve is equipped with a pneumatic plate covering at least one sleeve exhaust hole. One end of the pneumatic plate is fixed to a swing block, which is hinged to the inner sleeve. A plug shaft is fixed to the side of the swing block away from the pneumatic plate. The stationary support has a plug hole for inserting the plug shaft. The device also includes an elastic device for driving the pneumatic plate to swing away from the inner sleeve so that the plug shaft can be inserted into the plug hole.

[0012] When the gas passes through the exhaust port of the sleeve, the flow of the gas drives the pneumatic plate to swing towards the inner sleeve, causing the insert shaft to be pulled out of the insertion hole, thus realizing the rotation of the inner sleeve. After the arc blowing is completed, the airflow that drives the pneumatic plate to swing weakens, and the elastic device drives the pneumatic plate to swing away from the inner sleeve, thereby causing the insert shaft to move towards the insertion hole. At this time, since the inner sleeve is rotating, the insert shaft cannot be inserted into the insertion hole. When the insert shaft rotates with the inner sleeve until it is aligned with the insertion hole, the insert shaft is inserted into the insertion hole, and the inner sleeve suddenly stops rotating. This vibration causes the impurity powder attached to the filter screen to separate from the filter screen and fall off, making it easier to blow the impurity powder into the positioning sink hole through the impurity discharge hole.

[0013] As an optimization, the diameter of the insertion hole is 1.5 to 2.5 times the diameter of the insertion shaft, and the end of the insertion shaft is rounded. In this solution, the diameter of the insertion hole is 1.5 to 2.5 times the diameter of the insertion shaft, which facilitates the insertion of the insertion shaft into the insertion hole.

[0014] As an optimization, the elastic device includes a spring disposed between the pneumatic plate and the inner sleeve. In this design, the spring drives the pneumatic plate to swing away from the inner sleeve, causing the insertion shaft to insert into the insertion hole.

[0015] A method for using an aluminum cable outlet socket includes the following steps: a. When the circuit breaker is tripped and the arc is blown, the gas enters the circular countersunk hole of the aluminum base through the vent hole of the static support, and is blown out from the sleeve vent hole on the inner sleeve, and then exits through the base vent hole of the aluminum base. b. When the gas passes through the sleeve exhaust hole, the impurity powder is filtered by the filter ring and remains in the filter ring. The gas passes through the inclined sleeve exhaust hole, thereby driving the inner sleeve to rotate, causing the impurity powder attached to the filter ring to fall to the lower layer of the filter ring. Some gas is blown into the positioning sink hole through the impurity discharge hole and carries the impurity powder on the lower layer of the filter ring into the positioning sink hole. c. When the gas passes through the exhaust hole of the sleeve, the flow of the gas drives the pneumatic plate to swing towards the inner sleeve, causing the insertion shaft to be pulled out of the insertion hole, thereby realizing the rotation of the inner sleeve. d. After the arc blowing is completed, the airflow that drives the pneumatic plate to swing weakens. The elastic device drives the pneumatic plate to swing away from the inner sleeve, thereby moving the insert shaft in the direction of insertion into the insertion hole. At this time, since the inner sleeve is rotating, the insert shaft cannot be inserted into the insertion hole. When the insert shaft rotates with the inner sleeve until it is aligned with the insertion hole, the insert shaft is inserted into the insertion hole. The inner sleeve suddenly stops rotating, thereby causing the impurity powder attached to the filter screen to separate from the filter screen and fall off through vibration, making it easier to blow the impurity powder into the positioning sink hole through the impurity discharge hole.

[0016] The beneficial effects of the present invention are as follows: The aluminum lead-out socket with an inner surface anodized and its usage method of the present invention avoid damage to the aluminum lead-out socket by high temperature gas by setting an oxide film, and can collect the debris generated during the contact separation and bonding process to prevent it from affecting the insulation of surrounding components. The present invention has a simple structure, is easy to use, safe and reliable, has a low cost, and stable performance, and overcomes the problem of lead-out socket damage during arc blowing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 2 This is a schematic cross-sectional view of the present invention without the inner sleeve; Figure 3 For the present invention Figure 1 Sectional view of plane AA; Figure 4 For the present invention Figure 1 Enlarged view of a portion of the image; Figure 5 For the present invention Figure 1 A magnified view of another location in the image; Figure 6 This is a schematic diagram of the external structure of the present invention; Figure 7 This is a schematic diagram of the air baffle structure of the present invention; As shown in the figure: 1. Aluminum base; 2. Insulating tube; 3. Support flange; 4. Mounting flange; 5. Air baffle; 6. Terminal block; 7. Shielding cover; 8. Support rod; 9. Static support; 10. Static arc contact; 11. Guide cone; 12. Inner sleeve; 13. Base vent hole; 14. Sleeve vent hole; 15. Filter ring; 16. Support tube; 17. Filter plate; 18. Impurity discharge hole; 19. Pneumatic plate; 20. Swing block; 21. Insert shaft; 22. Insertion hole; 23. Spring. Detailed Implementation

[0018] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0019] like Figures 1-7 As shown, an aluminum terminal block with an anodized inner surface according to the present invention includes a fixed insulating tube 2 and a horizontally arranged aluminum base 1. The aluminum base 1 is made of cast aluminum alloy ZL101A-T6. The cast aluminum alloy ZL101A-T6 uses high-purity raw materials, reduces impurity content, and adds trace elements to refine the structure, resulting in high casting performance and corrosion resistance. The insulating tube 2 is fixedly installed inside the circuit breaker housing, thereby achieving the fixed installation of the aluminum base 1 through the insulating tube 2 and the static support 9. A terminal block 6 is provided at the upper right corner of the aluminum base 1.

[0020] One end of the aluminum base 1 has a circular countersunk hole. The end of the aluminum base 1 with the circular countersunk hole is connected to the stationary support 9 by bolts, and the circular countersunk hole is connected to the vent hole of the stationary support 9. A stationary arc contact 10 is fixedly connected inside the stationary support 9. Multiple base vent holes 13 are opened on the circumferential surface of the aluminum base 1. The base vent holes 13 are evenly distributed along the circumference and are transverse elongated holes.

[0021] A flow guide cone 11 is fixed to the bottom of the circular countersunk hole of the aluminum base 1. The flow guide cone 11 diverts the high-temperature SF6 gas to prevent the high-speed, high-temperature SF6 gas flow from directly and vertically impacting the bottom surface of the circular countersunk hole.

[0022] An inner sleeve 12 is connected to the inner shaft of the circular countersunk hole. The inner sleeve 12 is made of cast aluminum alloy ZL101A-T6. The length of the inner sleeve 12 covers the circumference of the circular countersunk hole. The inner sleeve 12 rotates in the circular countersunk hole and is connected by a bearing to reduce friction.

[0023] The inner sleeve 12 has multiple sleeve vent holes 14, which are evenly distributed around the circumference and have more than 10 vertical vent holes. The sleeve vent holes 14 are horizontal elongated holes with a width smaller than the width of the base vent holes 13. Each base vent hole 13 corresponds to at least three sleeve vent holes 14.

[0024] The sleeve exhaust hole 14 is arranged radially inclined, so that when the airflow flows through the sleeve exhaust hole 14, it will drive the inner sleeve 12 to rotate.

[0025] The inner sleeve 12 is equipped with a pneumatic plate 19 covering at least one sleeve exhaust hole 14. In this embodiment, the pneumatic plate 19 covers three sleeve exhaust holes 14. Figure 4 As shown, one end of the pneumatic plate 19 is fixed to the swing block 20, and the swing block 20 is hinged to the inner sleeve 12, with the hinge axis perpendicular to the axis of the circular countersunk hole. This allows the pneumatic plate 19 to swing up and down.

[0026] A shaft 21 is fixed to the side of the swing block 20 away from the wind-driven plate 19. The stationary support 9 has a hole 22 for inserting the shaft 21. The diameter of the hole 22 is 1.5 to 2.5 times the diameter of the shaft 21. The end of the shaft 21 is rounded to facilitate insertion of the shaft 21 into the hole 22.

[0027] It also includes an elastic device that drives the pneumatic plate 19 to swing away from the inner sleeve 12, causing the insertion shaft 21 to be inserted into the insertion hole 22. The elastic device includes a spring 23 disposed between the pneumatic plate 19 and the inner sleeve 12. When gas passes through the sleeve exhaust hole 14, the gas flow drives the pneumatic plate 19 to swing towards the inner sleeve 12, overcoming the elastic force of the spring 23, causing the insertion shaft 21 to be pulled out of the insertion hole 22, thereby achieving the rotation of the inner sleeve 12. After the arc blowing is completed, the airflow that drives the pneumatic plate 19 to swing weakens. The spring 23 drives the pneumatic plate 19 to swing away from the inner sleeve 12, thereby causing the insertion shaft 21 to move towards the insertion hole 22. At this time, since the inner sleeve 12 is in a rotating state, the insertion shaft 21 cannot be inserted into the insertion hole 22. When the insertion shaft 21 rotates with the inner sleeve 12 until it is aligned with the insertion hole 22, the insertion shaft 21 is inserted into the insertion hole 22, and the inner sleeve 12 suddenly stops rotating.

[0028] A filter ring 15 is fixed to the inner wall of the inner sleeve 12. An impurity discharge hole 18 is opened on the aluminum base 1, which connects the positioning countersunk hole and the circular countersunk hole. The impurity discharge hole 18 is adapted to the lower edge of the filter ring 15. The impurity powder on the lower edge of the filter ring 15 enters the positioning countersunk hole through the impurity discharge hole 18.

[0029] An oxide film is provided on the outer surface of the filter ring 15 and the inner wall of the inner sleeve 12. The oxide film thickness is 25-150 μm, and it is a dense anodic oxide film, which greatly improves the surface hardness, corrosion resistance, and wear resistance of the aluminum base. When the high-speed, high-temperature SF6 gas jet from the nozzle enters the outlet base, the arc decomposition products of the SF6 gas, with the participation of water, will produce many corrosive and toxic substances, thereby corroding the circuit breaker aluminum base and threatening the safety of maintenance personnel. Excessive water content will cause condensation, wetting the insulating surface and reducing its insulation strength, threatening the safe operation of the switch. However, due to the presence of an anodic oxide film, the gas will not damage the outer surface of the filter ring 15 or the inner wall of the inner sleeve 12.

[0030] The other end of the aluminum base 1 has a countersunk hole for positioning. One end of the insulating tube 2 is fixedly connected to a support tube 16 that is inserted into the countersunk hole. The support tube 16 and the insulating tube 2 are connected. Figure 5 As shown, a gap for impurity retention is left between the end of the support tube 16 and the bottom of the positioning counterhole, and a filter screen 17 is installed inside the support tube 16. The impurity powder blown out of the impurity discharge hole is retained in the impurity retention gap and the filter screen.

[0031] An installation flange 4 is provided between the insulating tube 2 and the aluminum base 1. The end of the installation flange 4 facing the insulating tube 2 has a flange countersunk hole. An annular support flange 3 is fixedly connected in the flange countersunk hole. The insulating tube 2 is inserted between the support flange 3 and the flange countersunk hole. The support tube 16 is fixedly connected to the side of the installation flange 4 facing the aluminum base 1.

[0032] An air baffle 5, covering the outer ring of the mounting flange 4, is fixedly connected to the mounting flange 4. The air baffle 5 is mounted on the mounting surface of the mounting flange 4 using hexagonal head bolts.

[0033] The aluminum base 1 is installed inside the shield 7 via the support rod 8. After the high-speed, high-temperature SF6 airflow leaves the aluminum base 1, it enters the shield 7 and is diverted a second time at the air baffle 5, which prevents the gas from being blown directly onto the outer surface of the insulating tube 2.

[0034] A method for using an aluminum cable outlet socket includes the following steps: a. When the circuit breaker is tripped and the arc is blown, the gas enters the circular countersunk hole of the aluminum base 1 through the gas outlet hole of the static support 9, and is blown out from the sleeve exhaust hole 14 on the inner sleeve 12, and then exits through the base exhaust hole 13 of the aluminum base 1. b. When the gas passes through the sleeve exhaust hole 14, the impurity powder is filtered by the filter ring 15 and remains in the filter ring 15. The gas passes through the inclined sleeve exhaust hole 14, thereby driving the inner sleeve 12 to rotate, causing the impurity powder attached to the filter ring 15 to fall to the lower layer of the filter ring 15. Some of the gas is blown into the positioning sink hole through the impurity discharge hole 18 and carries the impurity powder in the lower layer of the filter ring 15 into the positioning sink hole. c. When the gas passes through the sleeve exhaust hole 14, the flow of the gas drives the pneumatic plate 19 to swing towards the inner sleeve 12, causing the insertion shaft 21 to be pulled out of the insertion hole 22, thereby realizing the rotation of the inner sleeve 12. d. After the arc blowing is completed, the airflow that drives the pneumatic plate 19 to swing weakens. The elastic device drives the pneumatic plate 19 to swing away from the inner sleeve 12, thereby moving the insertion shaft 21 toward the insertion hole 22. At this time, since the inner sleeve 12 is rotating, the insertion shaft 21 cannot be inserted into the insertion hole 22. When the insertion shaft 21 rotates with the inner sleeve 12 until it is aligned with the insertion hole 22, the insertion shaft 21 is inserted into the insertion hole 22. The inner sleeve 12 suddenly stops rotating, thereby causing the impurity powder attached to the filter screen ring 15 to separate from the filter screen ring 15 and fall off, so that the impurity powder can be blown into the positioning sink hole through the impurity discharge hole 18.

[0035] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. An aluminum cable outlet with an anodized inner surface, characterized in that: The system includes a fixed insulating tube (2) and a horizontally arranged aluminum base (1). One end of the aluminum base (1) has a circular countersunk hole. The end of the aluminum base (1) with the circular countersunk hole is connected to a stationary support (9) by bolts, and the circular countersunk hole is connected to the vent hole of the stationary support (9). The other end of the aluminum base (1) has a positioning countersunk hole. One end of the insulating tube (2) is fixedly connected to a support tube (16) inserted into the positioning countersunk hole. Multiple base vent holes (13) are opened on the circumferential surface of the aluminum base (1). The circular countersunk hole is axially connected to... There is an inner sleeve (12), and multiple sleeve exhaust holes (14) are opened on the inner sleeve (12). The sleeve exhaust holes (14) are arranged radially inclined. A filter mesh ring (15) is fixed to the inner wall of the inner sleeve (12). An impurity discharge hole (18) connecting the positioning countersunk hole and the circular countersunk hole is opened on the aluminum base (1). The impurity discharge hole (18) is adapted to the lower edge of the filter mesh ring (15). An oxide film is provided on the outer surface of the filter mesh ring (15) and the inner wall of the inner sleeve (12). The inner sleeve (12) is equipped with a pneumatic plate (19) covering at least one sleeve exhaust hole (14). One end of the pneumatic plate (19) is fixed to the swing block (20). The swing block (20) is hinged to the inner sleeve (12). A plug shaft (21) is fixed to the side of the swing block (20) away from the pneumatic plate (19). The static support (9) has a plug hole (22) for inserting the plug shaft (21). The device also includes an elastic device that drives the pneumatic plate (19) to swing away from the inner sleeve (12) so that the plug shaft (21) is inserted into the plug hole (22).

2. The aluminum cable outlet holder with an anodized inner surface according to claim 1, characterized in that: A flow guide cone (11) is fixed to the bottom of the circular countersunk hole of the aluminum base (1).

3. The aluminum cable outlet holder with an anodized inner surface according to claim 1, characterized in that: An installation flange (4) is provided between the insulating tube (2) and the aluminum base (1). The installation flange (4) has a flange countersunk hole at one end facing the insulating tube (2). An annular support flange (3) is fixed in the flange countersunk hole. The insulating tube (2) is inserted between the support flange (3) and the flange countersunk hole. The support tube (16) is fixed on the side of the installation flange (4) facing the aluminum base (1).

4. The aluminum cable outlet holder with an anodized inner surface according to claim 3, characterized in that: A gap for impurities is left between the end of the support tube (16) and the bottom of the positioning counterhole, and a filter screen (17) is installed inside the support tube (16).

5. The aluminum cable outlet holder with an anodized inner surface according to claim 3, characterized in that: An air baffle (5) covering the outer ring of the mounting flange (4) is fixedly attached to the mounting flange (4).

6. The aluminum cable outlet holder with an anodized inner surface according to claim 1, characterized in that: The diameter of the insertion hole (22) is 1.5 to 2.5 times the diameter of the insertion shaft (21), and the end of the insertion shaft (21) is provided with rounded corners.

7. The aluminum cable outlet holder with an anodized inner surface according to claim 1, characterized in that: The elastic device includes a spring (23) disposed between the pneumatic plate (19) and the inner sleeve (12).

8. A method of using the aluminum cable outlet socket according to claim 1, characterized in that, Includes the following steps: a. When the circuit breaker is tripped and the arc is blown, the gas enters the circular countersunk hole of the aluminum base (1) through the gas outlet of the static support (9), and is blown out from the sleeve exhaust hole (14) on the inner sleeve (12), and then passes through the base exhaust hole (13) of the aluminum base (1) to be discharged. b. When the gas passes through the sleeve exhaust hole (14), the impurity powder is filtered by the filter ring (15) and remains in the filter ring (15). The gas passes through the inclined sleeve exhaust hole (14), thereby driving the inner sleeve (12) to rotate, causing the impurity powder attached to the filter ring (15) to fall to the lower layer of the filter ring (15). Some of the gas is blown into the positioning sink hole through the impurity discharge hole (18) and carries the impurity powder in the lower layer of the filter ring (15) into the positioning sink hole. c. When the gas passes through the sleeve exhaust hole (14), the flow of gas drives the pneumatic plate (19) to swing towards the inner sleeve (12), causing the insertion shaft (21) to be pulled out from the insertion hole (22), thereby realizing the rotation of the inner sleeve (12); d. After the arc blowing is completed, the airflow that drives the pneumatic plate (19) to swing weakens. The elastic device drives the pneumatic plate (19) to swing away from the inner sleeve (12), so that the insertion shaft (21) moves towards the insertion hole (22). At this time, since the inner sleeve (12) is in a rotating state, the insertion shaft (21) cannot be inserted into the insertion hole (22). When the insertion shaft (21) rotates with the inner sleeve (12) to be aligned with the insertion hole (22), the insertion shaft (21) is inserted into the insertion hole (22). The inner sleeve (12) suddenly stops rotating, so that the impurity powder attached to the filter screen (15) is separated from the filter screen (15) and falls down through vibration, so that the impurity powder can be blown into the positioning sink hole through the impurity discharge hole (18).

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