Modified polytetrafluoroethylene nozzle for circuit breaker

Abstract

The utility model discloses a modified polytetrafluoroethylene nozzle for a circuit breaker, which comprises a nozzle main body, the nozzle main body is made of a modified polytetrafluoroethylene material, one end of the nozzle main body is provided with a thread structure for connection, the thread structure is in threaded connection with a buckle structure, and the buckle structure is provided with a buckle. According to the modified polytetrafluoroethylene nozzle for the circuit breaker, the nozzle body is made of modified polytetrafluoroethylene materials, and the connection mode that the thread structure and the buckle structure are combined is combined, so that compared with traditional single thread connection, the modified polytetrafluoroethylene nozzle for the circuit breaker has the advantages that the nozzle body is made of modified polytetrafluoroethylene materials, and the service life of the nozzle body is prolonged; the connection stability and reliability are greatly enhanced, the problem of performance reduction caused by connection looseness is reduced, the connection stability is further enhanced through the design of the sleeving piece, the clamping part, the clamping hook and the like in the buckle structure, and vibration and impact can be effectively resisted.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely is a kind of for the modified polytetrafluoroethylene nozzle of circuit breaker. BACKGROUND

[0002] In circuit breaker equipment, arc extinguishing device is the key component to ensure its safe and stable operation, and nozzle as the core component of arc extinguishing device plays an important role. The traditional modified polytetrafluoroethylene nozzle for circuit breaker usually only adopts threaded connection mode, and single connection mode is prone to loose connection due to vibration, impact and other factors in long-term use, thereby affecting the arc extinguishing performance of nozzle, and even causing circuit breaker failure. Moreover, the traditional nozzle is insufficient in optimizing internal fluid mechanics performance in structural design, which is not conducive to efficient arc extinguishing. In addition, its dimensional accuracy and structural stability are difficult to meet the performance requirements of modern circuit breaker which is continuously improved.

[0003] With the increasing requirements of power system on reliability and stability of circuit breaker, the defects of existing modified polytetrafluoroethylene nozzle in connection structure and performance optimization are increasingly prominent, and there is an urgent need for an improved nozzle structure to improve the arc extinguishing effect and overall reliability of circuit breaker in breaking process. SUMMARY

[0004] The embodiment of the utility model provides a kind of modified polytetrafluoroethylene nozzle for circuit breaker, to solve the problem pointed out in the above background technology.

[0005] To achieve the above object, the utility model provides a kind of modified polytetrafluoroethylene nozzle for circuit breaker, including nozzle main part, the nozzle main part is made of modified polytetrafluoroethylene material, one end of the nozzle main part is equipped with threaded structure for connection, the threaded structure is threadedly connected with buckle structure, and the nozzle main part is used for arc extinguishing when circuit breaker breaks.

[0006] As a preferred scheme of the utility model, the overall length of the nozzle main part is 270mm in axial dimension, and the other end is provided with a specific part with a length of 71±0.20mm.

[0007] As a preferred scheme of the utility model, the threaded structure is arranged at one end of the nozzle main part, and the thread specification of the threaded structure is M90X4.

[0008] As a preferred scheme of the utility model, the buckle structure includes a sleeve piece, one end of the sleeve piece is threadedly connected with the threaded structure, the other end of the sleeve piece is provided with a wedge-shaped surface clamping portion outside, one side of the clamping portion is provided with a clamping hook opened outside the sleeve piece, and the clamping hook has a width of 5+0.50mm.

[0009] As a preferred scheme of the utility model, the spout body is provided with a specific inner hole section with a diameter of φ35±00.10 and a length of 4 mm, and an inner hole part with a diameter of φ90 in transition connection therewith.

[0010] As a preferred scheme of the utility model, the other end of the spout body is internally provided with a fillet structure for optimizing the internal fluid mechanics performance of the spout.

[0011] As a preferred scheme of the utility model, the other end of the spout body is externally provided with a groove structure with a width of 20 mm and a depth of 13 mm.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1) The modified polytetrafluoroethylene spout for circuit breaker of the utility model adopts the modified polytetrafluoroethylene material for the spout body, and combines the connecting mode of the thread structure and the buckle structure, greatly enhances the stability and reliability of the connection compared with the traditional single thread connection, and reduces the performance decline problem caused by loose connection. The design of the sleeve piece, the clamping part and the clamping hook in the buckle structure further strengthens the stability of the connection, and can effectively resist vibration and impact.

[0014] 2) The modified polytetrafluoroethylene spout for circuit breaker of the utility model optimizes the internal fluid mechanics performance through the specific inner hole section size design and the fillet structure of the spout body, so that the flow of arc extinguishing gas in the spout is more smooth, the arc extinguishing efficiency is significantly improved, and at the same time, the size accurate design of the groove structure and other structures on the spout body further enhances the stability of the spout and other components, thereby improving the reliability and safety of the overall operation of the circuit breaker, and meeting the high performance demand of modern power system on the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a schematic view of the overall structure of the utility model;

[0016] Fig. 2 It is a sectional view of the utility model;

[0017] Fig. 3 It is a schematic view of the buckle structure of the utility model.

[0018] In the drawing: 1, spout body; 11, specific part; 12, specific inner hole section; 13, inner hole part; 14, fillet structure; 15, groove structure; 2, thread structure; 3, buckle structure; 31, sleeve piece; 32, clamping part; 33, clamping hook. DETAILED DESCRIPTION

[0019] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0020] Embodiment 1

[0021] Please refer to Figs. 1-3 The utility model provides a kind of modified polytetrafluoroethylene nozzle for circuit breaker, including nozzle main body 1, nozzle main body 1 is made of modified polytetrafluoroethylene material, one end of nozzle main body 1 is equipped with threaded structure 2 for connection, threaded structure 2 is threadedly connected with buckle structure 3, nozzle main body 1 is used for arc extinguishing when circuit breaker opens.

[0022] Specifically, nozzle main body 1 is made of modified polytetrafluoroethylene material, so that nozzle main body 1 has excellent corrosion resistance, high temperature resistance and low friction coefficient and other characteristics, when circuit breaker works, when circuit fault needs to be opened, strong arc will be generated, nozzle main body 1 is in arc extinguishing critical position, at this time, threaded structure 2 and buckle structure 3 jointly act, and nozzle main body 1 is stably connected on the relevant components of circuit breaker, threaded structure 2 preliminarily fixes the position of nozzle main body 1, and provides certain pre-tightening force;Buckle structure 3 further locks, to prevent nozzle main body 1 from loosening under the working conditions such as vibration and impact generated by frequent opening of circuit breaker, in the arc extinguishing process, nozzle main body 1 guides high-speed ejection of arc extinguishing medium such as gas, and uses the high-speed flow of medium to rapidly cool and extinguish arc, to ensure that circuit breaker safely and reliably completes opening action, and avoids problems such as equipment damage caused by the existence of arc.

[0023] In the embodiment, the overall length of nozzle main body 1 is 270mm in axial dimension, and the other end is provided with a specific part 11 with a length of 71±0.20mm.

[0024] Specifically, in the circuit breaker, the arc extinguishing process needs enough space for the arc extinguishing gas to accelerate and fully act on the arc, and the specific part 11 with a length of 71±0.20mm is located at one end of the nozzle main body 1, which can preliminarily guide and accelerate the gas when the arc extinguishing gas flows, after the arc is generated by the opening of the circuit breaker, the arc extinguishing gas flows into the nozzle main body 1, and the gas flow rate starts to increase and the pressure gradually decreases when passing through the specific part 11 due to the limitation of its size, forming a high-speed airflow, which can quickly lengthen and cool the arc, thereby weakening the energy of the arc, and finally achieving arc extinguishing, and the precise size control ensures the consistency and stability of gas flow in each arc extinguishing process, improving the reliability of arc extinguishing effect.

[0025] In the embodiment, the threaded structure 2 is arranged outside one end of the nozzle body 1, and the thread specification of the threaded structure 2 is M90X4.

[0026] Specifically, when installing the nozzle, first, the nozzle body 1 is screwed with the corresponding threaded interface on the circuit breaker through the threaded structure 2. The helix angle and the tooth profile of the thread are designed to generate a certain axial force during the screwing process, so that the nozzle body 1 is gradually tightened to achieve preliminary fixation. The threaded connection method has the characteristics of simple structure and reliable connection, and the installation position of the nozzle body 1 can be accurately controlled by the number of rotations. During the operation of the circuit breaker, the threaded structure 2 continuously bears various forces received by the nozzle body 1, including the reaction force generated by the gas during arc extinguishing. Due to the self-locking property of the thread and sufficient thread tooth strength, it can be ensured that the nozzle body 1 will not loosen or fall off under normal working conditions, maintaining the relative position stability between the nozzle and other components of the circuit breaker, thereby ensuring the normal implementation of the arc extinguishing function.

[0027] In the embodiment, the buckle structure 3 includes a sleeve piece 31, one end of the sleeve piece 31 is internally connected with the threaded structure 2, and the other end of the sleeve piece 31 is externally provided with a wedge-shaped clamping part 32. One side of the clamping part 32 is provided with a clamping hook 33 opened outside the sleeve piece 31, and the width of the clamping hook 31 is 5+0.50mm.

[0028] Specifically, the other end of the sleeve piece 31 is externally provided with a wedge-shaped clamping part 32. When it is necessary to further lock the nozzle body 1, the clamping part 32 can cooperate with the corresponding clamping groove or clamping part on the circuit breaker. Through the design of the wedge surface, external force such as pressing can be used to smoothly clamp the clamping part 32 into the corresponding part during installation. After clamping, due to the self-locking effect of the wedge surface, the clamping part 32 can be prevented from easily falling out. The clamping hook 33 can cooperate with another corresponding clamping hook or blocking part to further limit the axial movement of the sleeve piece 31. During the operation of the circuit breaker, the buckle structure 3 and the threaded structure 2 work together to resist external forces generated by factors such as gas impact during arc extinguishing and equipment vibration, ensuring that the nozzle body 1 is always firmly connected to the circuit breaker, and ensuring the stability and reliability of the arc extinguishing process.

[0029] In the embodiment, the nozzle body 1 is provided with a specific inner hole section 12 with a diameter of φ35±0.10 and a length of 4mm, and an inner hole part 13 with a diameter of φ90 connected thereto.

[0030] Specifically, during the arc extinguishing process, the arc extinguishing gas first enters the inner hole part 13 of the nozzle body 1. Since the inner hole part 13 has a relatively large diameter, the gas has a certain buffer space here and can flow relatively smoothly. When the gas flows through the specific inner hole section 12, the diameter suddenly decreases, and according to the principle of fluid mechanics, the gas flow rate will rapidly increase. The sudden change in flow rate enables the gas to be sprayed out of the nozzle body 1 at high speed, fully contacting the arc generated during the breaking of the circuit breaker. The high-speed airflow can quickly carry away the heat of the arc, rapidly reducing the temperature of the arc, thereby inhibiting the further development of the arc. At the same time, the airflow parameters during each arc extinguishing are basically the same, improving the repeatability and reliability of the arc extinguishing effect and ensuring the accurate execution of the breaking action of the circuit breaker.

[0031] In this embodiment: the other end of the nozzle body 1 is internally provided with a fillet structure 14 for optimizing the internal fluid mechanics of the nozzle.

[0032] Specifically, during the flow of arc extinguishing gas, when the gas flows inside the nozzle body 1, the fillet structure 14 enables the gas to flow more smoothly at the turning point, reducing the generation of turbulence and vortex flow. The fillet structure 14 can make the gas boundary layer more stable, reducing gas separation phenomena. The arc extinguishing gas can flow more efficiently inside the nozzle body 1, reaching the arc area more quickly and enhancing the cooling and extinguishing effect on the arc. At the same time, the fillet structure 14 can also reduce internal wear of the nozzle body 1 caused by gas impact, prolonging the service life of the nozzle and ensuring the stability of the arc extinguishing performance of the circuit breaker during long-term operation.

[0033] In this embodiment: the other end of the nozzle body 1 is externally provided with a groove structure 15 with a width of 20mm and a depth of 13mm.

[0034] Specifically, during the actual assembly of the circuit breaker, the groove structure 15 can cooperate with the corresponding protrusions or positioning components during assembly, serving as a precise positioning function. Through this positioning cooperation, the installation position of the nozzle body 1 in the circuit breaker can be ensured to be accurate and error-free, ensuring that the jet direction and angle of the arc extinguishing gas meet the design requirements, thereby improving the arc extinguishing effect. During the operation of the circuit breaker, the groove structure 15 can provide installation space for some auxiliary components such as seals, effectively preventing the leakage of arc extinguishing gas and ensuring that the arc extinguishing gas can flow along the predetermined path, enhancing the effectiveness of arc extinguishing. In addition, the groove structure 15 can also reduce the weight of the nozzle body 1 to some extent, optimizing the overall weight distribution of the circuit breaker, while not affecting the structural strength and arc extinguishing performance of the nozzle body 1.

[0035] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A modified polytetrafluoroethylene nozzle for use in circuit breakers, characterized in that, The nozzle body (1) is made of modified polytetrafluoroethylene. One end of the nozzle body (1) is provided with a threaded structure (2) for connection. The threaded structure (2) is threadedly connected with a snap-fit ​​structure (3). The nozzle body (1) is used to extinguish the arc when the circuit breaker is broken.

2. The modified polytetrafluoroethylene nozzle for a circuit breaker according to claim 1, characterized in that, The nozzle body (1) has an overall length of 270 mm in axial dimension, and a specific part (11) with a length of 71 ± 0.20 mm is provided at the other end.

3. A modified polytetrafluoroethylene nozzle for a circuit breaker according to claim 1, characterized in that, The threaded structure (2) is located on the outside of one end of the nozzle body (1), and the thread specification of the threaded structure (2) is M90X4.

4. A modified polytetrafluoroethylene nozzle for a circuit breaker according to claim 1, characterized in that, The buckle structure (3) includes a sleeve (31), one end of which is internally threaded to the threaded structure (2), and the other end of which is externally provided with a wedge-shaped snap-fit ​​part (32). One side of the snap-fit ​​part (32) is provided with a hook (33) opened on the outside of the sleeve (31), and the width of the hook (33) is 5+0.50mm.

5. A modified polytetrafluoroethylene nozzle for a circuit breaker according to claim 1, characterized in that, The nozzle body (1) has a specific inner hole section (12) with a diameter of φ35±0.10 and a length of 4mm, and an inner hole section (13) with a diameter of φ90 that is transitionally connected to it.

6. A modified polytetrafluoroethylene nozzle for a circuit breaker according to claim 1, characterized in that, The other end of the nozzle body (1) is provided with a rounded corner structure (14) for optimizing the internal hydrodynamic performance of the nozzle.

7. A modified polytetrafluoroethylene nozzle for a circuit breaker according to claim 1, characterized in that, The other end of the nozzle body (1) is provided with a groove structure (15) with a width of 20 mm and a depth of 13 mm.

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