Conducting rod of arc extinguish chamber

Abstract

The utility model relates to the technical field of vacuum arc extinguish chambers, in particular to an arc extinguish chamber conducting rod which comprises a porcelain shell, a protective sleeve is installed on one side of the porcelain shell, and a limiting assembly is installed in the protective sleeve and used for restraining movement of a corrugated pipe. Compared with the prior art, the limiting assembly is arranged in the conducting rod of the arc extinguish chamber, when the expansion and contraction of the corrugated pipe exceed the preset range, the limiting assembly generates elastic restoring force through the synergistic effect of the matching plate, the connecting plate and the spring, further deformation of the corrugated pipe is limited, and the corrugated pipe is prevented from being damaged due to excessive stretching or compression; when the movable conducting rod stops moving or the expansion amount is reduced, the spring can automatically push the matching plate to reset, the moderate abutting state of the buffer block and the corrugated pipe is kept, rigid impact between the corrugated pipe and surrounding components is avoided, and therefore the durability and sealing reliability of the corrugated pipe and the whole arc extinguish chamber conducting rod device are effectively improved. And the electrical performance stability and the structure safety of the arc extinguish chamber in long-term operation are ensured.

Description

Technical Field

[0001] This utility model relates to the field of vacuum arc-extinguishing chamber technology, and in particular to a conductive rod for an arc-extinguishing chamber. Background Technology

[0002] In the field of high-voltage electrical switchgear, the arc-extinguishing chamber conductive rod is a key component that undertakes the important functions of current conduction and arc extinguishing. Its performance directly affects the operational stability and safety of the entire electrical system. Among them, the motion characteristics of the moving conductive rod during operation and the working state of the bellows that work with it are the key factors affecting the performance of the arc-extinguishing chamber conductive rod.

[0003] During the actual operation of the conductive rod in the arc-extinguishing chamber, the moving conductive rod will reciprocate according to the operation command to realize the opening and closing action of the switch. This movement process will inevitably drive the bellows to expand and contract. As a flexible element connecting the moving conductive rod and other components of the arc-extinguishing chamber, the bellows can not only adapt to the movement of the moving conductive rod, but also play a sealing role to prevent gas leakage in the arc-extinguishing chamber and maintain a specific pressure environment in the arc-extinguishing chamber, which is crucial to the arc-extinguishing effect.

[0004] However, in the existing arc-extinguishing chamber conductive rod structure, the bellows lacks an effective limitation and protection mechanism for its expansion and contraction. When the moving conductive rod moves too much or at an uneven speed, the bellows may undergo excessive expansion and contraction deformation. This excessive deformation can easily lead to the bellows being pulled apart or crushed. Once the bellows is damaged, the sealing performance of the arc-extinguishing chamber will be severely affected, and internal gas leakage will disrupt the pressure conditions required for arc extinguishing, thereby reducing the arc extinguishing effect and potentially causing electrical faults, threatening the stable operation of the entire power system.

[0005] Furthermore, during the expansion and contraction of the bellows, it often makes rigid contact with the limiting structure. When the moving conductive rod moves, the bellows collides directly with the limiting structure. This rigid impact generates a large mechanical impact force. Under this working condition for a long time, the bellows will wear down faster due to frequent mechanical impacts, and its structural strength and elasticity will gradually decrease, thus greatly shortening the service life of the bellows and increasing the maintenance cost and downtime of the equipment. Utility Model Content

[0006] In view of this, the purpose of this utility model is to propose an arc-extinguishing chamber conductive rod to solve the problem of the lack of effective limiting and buffer protection for bellows during expansion and contraction.

[0007] To achieve the above objectives, this utility model provides a conductive rod for an arc-extinguishing chamber, comprising: a ceramic shell, a protective sleeve installed on one side of the ceramic shell, a stationary cover plate installed on the other side of the ceramic shell, a stationary conductive rod installed on one side of the stationary cover plate, a stationary contact installed on one side of the stationary conductive rod, a movable conductive rod movably installed inside the protective sleeve, a bellows sleeved on the outer side of the movable conductive rod, a movable contact installed on one side of the movable conductive rod, the stationary contact abutting against the movable contact, and a limiting component installed inside the protective sleeve, the limiting component being used to constrain the movement of the bellows.

[0008] Preferably, a shielding chamber is provided inside the ceramic shell, the stationary conductive rod and the stationary contact are installed in the shielding chamber, a corrugated tube shield is installed inside the protective sleeve on the side near the ceramic shell, the moving conductive rod passes through the corrugated tube shield and extends into the shielding chamber, and the stationary conductive rod is disposed through the shielding chamber.

[0009] Preferably, the limiting component includes several support columns installed on one side of the corrugated pipe shield, the other side of the support columns installed on one side of the protective sleeve, several mating plates slidably installed between two of the support columns, and several buffer blocks fixedly installed on the mating plates near the corrugated pipe, the buffer blocks abutting against the corrugated pipe.

[0010] Preferably, the support column has symmetrical grooves on both sides, and the mating plate has sliders fixedly installed symmetrically on both sides, with the sliders slidably installed in the grooves.

[0011] Preferably, the support column has a sliding groove that penetrates the sliding groove, and a plurality of connecting plates are slidably installed in the sliding groove. The connecting plates are fixedly connected to the slider, and a spring is fixedly installed between two connecting plates.

[0012] Preferably, the mating plate is arc-shaped and is coaxially arranged with the corrugated pipe.

[0013] The beneficial effects of this utility model are:

[0014] 1. This type of arc-extinguishing chamber conductive rod, by setting a limit component, can effectively limit the expansion and contraction of the bellows during the movement of the moving conductive rod. When the bellows expands or contracts due to the movement of the moving conductive rod, the cooperating plate, buffer block, and bellows work together. Once the expansion or contraction of the bellows exceeds the predetermined range, the cooperating plate moves and drives the connecting plate to compress or stretch the spring. The elastic restoring force of the spring can limit the bellows from continuing to deform excessively, thereby preventing the bellows from being pulled apart or crushed. In addition, the spring can also automatically reset the cooperating plate when the expansion or contraction of the bellows weakens, keeping the buffer block and the bellows in proper contact, effectively preventing rigid impact, further protecting the bellows from damage, and improving the durability and reliability of the system.

[0015] 2. This type of arc-extinguishing chamber conductive rod is equipped with a buffer block, which is set on the mating plate and directly contacts the bellows. When the moving conductive rod moves, the bellows squeezes or pulls the buffer block instead of acting directly on the mating plate, thereby achieving soft contact. This can effectively transmit displacement action and also play a buffering role, preventing rigid collisions between the bellows and the limiting components, reducing mechanical impact, further reducing the risk of bellows wear or damage due to long-term movement, and extending the service life of the bellows. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the limiting component of this utility model;

[0021] Figure 5 This is a schematic diagram showing the disassembled structure of the mating plate, support column, and connecting plate of this utility model;

[0022] Figure 6 This is a cross-sectional structural diagram of the support column of this utility model.

[0023] The diagram is marked as follows:

[0024] 1. Ceramic shell; 2. Protective sleeve; 3. Moving conductive rod; 4. Stationary cover plate; 5. Shielding chamber; 6. Corrugated pipe shielding cover; 7. Corrugated pipe; 8. Stationary conductive rod; 9. Stationary contact; 10. Moving contact; 11. Support column; 12. Mating plate; 13. Buffer block; 14. Slider; 15. Connecting plate; 16. Spring; 17. Slide groove; 18. Sliding groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figures 1 to 6 As shown, the arc-extinguishing chamber conductive rod includes: a ceramic shell 1, a protective sleeve 2 installed on one side of the ceramic shell 1, a stationary cover plate 4 installed on the other side of the ceramic shell 1, a stationary conductive rod 8 installed on one side of the stationary cover plate 4, a stationary contact 9 installed on one side of the stationary conductive rod 8, a movable conductive rod 3 movably installed inside the protective sleeve 2, a bellows 7 sleeved on the outside of the movable conductive rod 3, a movable contact 10 installed on one side of the movable conductive rod 3, and the stationary contact 9 abutting against the movable contact 10. A limiting component is installed inside the protective sleeve 2 to constrain the movement of the bellows 7. A shielding chamber 5 is provided inside the ceramic shell 1, the stationary conductive rod 8 and the stationary contact 9 are installed inside the shielding chamber 5, a bellows shield 6 is installed inside the protective sleeve 2 near the ceramic shell 1, the movable conductive rod 3 passes through the bellows shield 6 and extends into the shielding chamber 5, and the stationary conductive rod 8 passes through the shielding chamber 5.

[0028] When the arc-extinguishing chamber conductive rod device is in operation, under normal closed state, the stationary contact 9 and the moving contact 10 abut against each other, and the current can flow smoothly through the stationary conductive rod 8, stationary contact 9, moving contact 10, and moving conductive rod 3 to realize the circuit conduction function. During this process, the stationary conductive rod 8 and stationary contact 9 are located in the shielding chamber 5 set inside the ceramic shell 1. The shielding chamber 5 can shield and homogenize the electric field, reduce electric field distortion, reduce local electric field intensity, prevent insulation breakdown caused by electric field concentration, and ensure the stability and safety of the electric field environment inside the device. At the same time, the corrugated pipe shielding cover 6 on the protective sleeve 2 can shield the electric field in the area where the corrugated pipe 7 is located and the surrounding area, further optimizing the electric field distribution, reducing the impact of the electric field on the corrugated pipe 7 and other components, and avoiding damage to the performance of the corrugated pipe 7 due to the electric field. The moving conductive rod 3 moves inside the protective sleeve 2, and its outer side The bellows 7 extends and retracts accordingly to accommodate the movement of the moving conductive rod 3, ensuring the internal sealing of the device when the moving conductive rod 3 is in motion. This prevents external impurities from entering and leakage of the internal arc-extinguishing medium. The limiting components installed inside the protective sleeve 2 restrict the movement of the bellows 7, preventing it from being excessively stretched or compressed during the movement of the moving conductive rod 3. This avoids damage to the bellows 7 due to exceeding its elastic limit, thus ensuring that the bellows 7 can always perform its sealing function normally and maintain a stable working environment inside the device. When it is necessary to disconnect the circuit, the moving conductive rod 3 moves under the action of the external driving mechanism, causing the moving contact 10 to separate from the stationary contact 9. An electric arc is generated during the separation process. At this time, the arc-extinguishing medium and the shielding chamber 5 and other structures inside the device work together to quickly extinguish the arc, preventing the arc from continuing to burn and causing damage to the device, and ensuring that the circuit is disconnected safely and reliably.

[0029] like Figures 2 to 6 As shown, the limiting assembly includes several support columns 11 installed on one side of the bellows shield 6, and the other side of the support columns 11 installed on one side of the protective sleeve 2. Several mating plates 12 are slidably installed between the two support columns 11. Several buffer blocks 13 are fixedly installed on the mating plates 12 near the bellows 7, and the buffer blocks 13 abut against the bellows 7. Sliding grooves 17 are symmetrically opened on both sides of the support columns 11. Sliding blocks 14 are symmetrically fixedly installed on both sides of the mating plates 12, and the sliding blocks 14 are slidably installed in the sliding grooves 17. Sliding grooves 18 are opened in the support columns 11, and the sliding grooves 18 and 17 are connected. Several connecting plates 15 are slidably installed in the sliding grooves 18, and the connecting plates 15 and the sliding blocks 14 are fixedly connected. A spring 16 is fixedly installed between the two connecting plates 15. The mating plates 12 are arc-shaped and are coaxially arranged with the bellows 7.

[0030] When the limiting component in the arc-extinguishing chamber's conductive rod is working, during the process of the moving conductive rod 3 driving the bellows 7 to extend and retract, since the mating plate 12 is coaxially arranged with the bellows 7 and the buffer block 13 abuts against the bellows 7, when the bellows 7 undergoes extension and retraction displacement due to the movement of the moving conductive rod 3, the bellows 7 will squeeze or pull the buffer block 13, thereby pushing the mating plate 12 to move. The sliders 14 on both sides of the mating plate 12 slide in the symmetrically opened grooves 17 on both sides of the support column 11, ensuring that the mating plate 12 moves stably in the set direction and preventing it from deviating. At the same time, the connecting plate 15 slides synchronously with the sliders 14 in the sliding groove 18 that penetrates the groove 17 in the support column 11, making the movement of the mating plate 12 smoother. When the bellows 7 excessively extends and retracts in a certain direction, the mating plate 12 on one side is squeezed and moves. The connecting plate 15 connected to the mating plate 12 will compress the spring 16, and the spring 16 will undergo elastic deformation and accumulate elastic potential energy. On the other side, the mating plate 12 is relatively far away due to the pulling effect of the bellows 7. The connecting plate 15 connected to it stretches the other end of the spring 16. The elastic restoring force of the spring 16 will hinder the further movement of the mating plate 12, thereby limiting the excessive extension and contraction of the bellows 7 and preventing the bellows 7 from exceeding its elastic limit. When the extension and contraction trend of the bellows 7 weakens or stops, the elastic potential energy accumulated by the spring 16 is released, pushing the connecting plate 15 to drive the slider 14 and the mating plate 12 to reset, so that the mating plate 12 and the buffer block 13 always maintain a moderate contact with the bellows 7. The buffer block 13 can also play a buffering role between the mating plate 12 and the bellows 7, avoiding direct rigid contact that could damage the bellows 7, ensuring that the bellows 7 extends and contracts within the normal working range, ensuring the internal sealing of the arc-extinguishing chamber conductive rod, preventing leakage of the arc-extinguishing medium and the entry of external impurities, maintaining a stable working environment inside the device, and ensuring the normal operation of the arc-extinguishing chamber conductive rod.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0032] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A conductive rod for an arc-extinguishing chamber, characterized in that, include: A ceramic shell (1) is provided with a protective sleeve (2) on one side and a stationary cover plate (4) on the other side. A stationary conductive rod (8) is provided on one side of the stationary cover plate (4) and a stationary contact (9) is provided on one side of the stationary conductive rod (8). A movable conductive rod (3) is movably installed inside the protective sleeve (2). A bellows (7) is sleeved on the outside of the movable conductive rod (3). A movable contact (10) is provided on one side of the movable conductive rod (3). The stationary contact (9) abuts against the movable contact (10). A limiting component is installed inside the protective sleeve (2). The limiting component is used to constrain the movement of the bellows (7).

2. The conductive rod for the arc-extinguishing chamber according to claim 1, characterized in that, A shielding chamber (5) is provided inside the ceramic shell (1). The static conductive rod (8) and the static contact (9) are installed inside the shielding chamber (5). A corrugated tube shield (6) is installed inside the protective sleeve (2) on the side close to the ceramic shell (1). The moving conductive rod (3) passes through the corrugated tube shield (6) and extends into the shielding chamber (5). The static conductive rod (8) is installed through the shielding chamber (5).

3. The arc-extinguishing chamber conductive rod according to claim 2, characterized in that, The limiting component includes several support columns (11) installed on one side of the corrugated pipe shield (6), and the other side of the support columns (11) is installed on one side of the protective sleeve (2). Several mating plates (12) are slidably installed between the two support columns (11). Several buffer blocks (13) are fixedly installed on the mating plate (12) near the corrugated pipe (7), and the buffer blocks (13) abut against the corrugated pipe (7).

4. The arc-extinguishing chamber conductive rod according to claim 3, characterized in that, The support column (11) has symmetrical grooves (17) on both sides, and the mating plate (12) has symmetrical sliders (14) fixedly installed on both sides. The sliders (14) are slidably installed in the grooves (17).

5. The arc-extinguishing chamber conductive rod according to claim 4, characterized in that, The support column (11) has a sliding groove (18) inside, the sliding groove (18) is connected to the sliding groove (17), and a number of connecting plates (15) are slidably installed in the sliding groove (18). The connecting plates (15) and the slider (14) are fixedly connected, and a spring (16) is fixedly installed between two connecting plates (15).

6. The arc-extinguishing chamber conductive rod according to claim 5, characterized in that, The mating plate (12) is arc-shaped and is coaxially arranged with the corrugated pipe (7).

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