Exhaust structure and circuit breaker
By designing the exhaust structure and insert structure and adjusting the internal pressure of the circuit breaker, the problem of shell damage and arc extinguishing effect of the circuit breaker when the circuit breaker is broken down during high current is solved, and a more efficient arc extinguishing and protection level is achieved.
Patent Information
- Application Number
- CN202411721813.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2024-12-31
AI Technical Summary
When the existing circuit breaker is disconnected with high current, the size of the arc extinguishing device is fixed, which cannot meet the needs of different short-circuit currents, resulting in damage to the outer shell by internal high-pressure gas and making it difficult to achieve the optimal air-blow arc extinguishing effect.
An exhaust structure is designed, including a base, a shell, an arc extinguishing device and an exhaust component. By setting up structures such as partitions, inserts and fixing buckles, the internal pressure is adjusted, and damage to the outer shell is reduced, and through different The insert structure improves the protection level.
It effectively reduces damage to the shell by internal pressure, ensures the optimal air blowing and arc extinguishing effect, and improves the product's protection level.
Smart Images
Figure CN119230354A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of circuit breakers, and in particular to an exhaust structure and a circuit breaker. Background Art
[0002] The rapid development of new energy, photovoltaic and energy storage industries has also led to the favorable development of low-voltage power distribution systems. Due to the particularity of the use environment of the above-mentioned industries, low-voltage power distribution systems are required to be used in a wider range and harsher environment, which puts higher requirements on low-voltage components. Due to the working characteristics of the product, the internal high-pressure gas needs to be ejected at the arc spray port when large currents are interrupted. Limited by the size of the switch cabinet, the circuit breaker must meet the requirements of zero arcing or short arcing to reduce the impact of arcing during short-circuit interruption. Different breaking currents have different energies. At present, the size of the arc extinguishing device of most circuit breakers is fixed. Different exhaust pressures are required for different short-circuit currents. A single size cannot achieve the maximum arc extinguishing effect.
[0003] Therefore, the present invention needs to provide a device that can reduce the damage of the internal pressure to the outer shell by adjusting the internal pressure of the arc extinguishing cavity when large current is interrupted, thereby ensuring the optimal air-blowing arc extinguishing effect. In addition, selecting different plug structures can improve the protection level of the product. Summary of the invention
[0004] The object of the present invention is to provide an exhaust structure and a circuit breaker, so as to solve the above-mentioned problems existing in the prior art.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: An exhaust structure comprises a base and a shell, wherein the shell is located at the upper part of the base, a receiving cavity is provided at the line inlet end of the shell, an arc extinguishing device is provided in the receiving cavity, at least one installation cavity is provided at one end of the shell close to the arc extinguishing device, an exhaust component is provided in the installation cavity, the exhaust component is used to reduce the pressure in the shell, a partition is also provided between the arc extinguishing device and the exhaust component, a first channel is provided on the partition, the exhaust component comprises a first plug, a sealing buckle and a second plug, the sealing buckle is located between the first plug and the second plug, the second plug is provided on a side close to the arc extinguishing device, and a plurality of ventilation holes are provided on the first plug and the second plug.
[0006] Furthermore, the exhaust assembly also includes a third plug-in sheet, and the third plug-in sheet is located on a side of the first plug-in sheet away from the sealing buckle.
[0007] Furthermore, the first plug-in piece includes a first plug-in piece body, first fixing blocks are provided on both sides of the first plug-in piece body, and first installation grooves are provided on both sides of the sealing buckle for installing the first plug-in piece.
[0008] Furthermore, the third plug-in piece includes a third plug-in piece body, and first fixing blocks are provided on both sides of the third plug-in piece body, and second claws are provided on both sides of the sealing buckle for installing the third plug-in piece and reserved for installing the third plug-in piece.
[0009] Furthermore, the sealing buckle includes a fixing plate, side plates are provided on both sides of the fixing plate, a top plate is provided at the upper end of the fixing plate, a bottom plate is provided at the lower end of the fixing plate, and at least one second channel is provided on the fixing plate.
[0010] Furthermore, a first clamping claw is provided at the lower part of the bottom plate, and a mounting hole is provided at the bottom of the mounting cavity corresponding to the mounting of the first clamping claw, and the first clamping claw cooperates with the mounting hole.
[0011] Furthermore, the first plug-in piece and the second plug-in piece are made of insulating material or metal material, and the third plug-in piece is made of insulating material.
[0012] Furthermore, slots for installing the exhaust assembly are provided on both sides of the installation cavity, and both sides of the exhaust assembly are installed in the slots.
[0013] Furthermore, the top plate of the sealing buckle is fixed to the upper part of the installation cavity by a fixing member.
[0014] The present invention also includes a circuit breaker, wherein the circuit breaker includes the exhaust assembly.
[0015] The beneficial effects of the present invention are: Since the present invention is provided with an exhaust assembly, the exhaust assembly can effectively reduce the damage of the internal pressure to the shell, ensuring the optimal air-blowing arc-extinguishing effect. In addition, selecting different insert structures can improve the protection level of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the installation of the exhaust structure and the housing of the present invention; Figure 2 It is a structural diagram of the housing of the present invention; Figure 3 is a cross-sectional view of the exhaust structure of the present invention; Figure 4 It is a structural diagram of the sealing buckle of the present invention; Figure 5 is an assembly diagram of the sealing buckle and the second insert of the present invention; Figure 6 The sealing buckle and the third insert of the present invention; Figure 7 This is a structural diagram of the first insert of the present invention; Figure 8 is a structural diagram of the third insert of the present invention; Fig. 9 It is another structural diagram of the sealing buckle of the present invention.
[0017] Reference numerals: Seat 1, housing 2, arc extinguishing device 3, mounting cavity 4, mounting hole 41, exhaust assembly 5, first passage 6; The first plug piece 51 , the exhaust hole 511 , the sealing buckle 52 , the first mounting groove 521 , the second claw 522 , the side plate 523 , the top plate 524 , the first claw 526 , the second channel 525 , the second plug piece 53 , the vent hole 531 , the third plug piece 54 , and the first fixing block 541 . DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.
[0019] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0021] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0022] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.
[0023] like Figures 1 to 9 As shown, an exhaust structure includes a base 1 and a shell 2, wherein the shell 2 is located at the upper part of the base and the base 1 and the shell 2 are fixedly connected by fixing screws, a receiving cavity is provided at the incoming line end of the shell 2, and an arc extinguishing device 3 is provided in the receiving cavity, and at least one installation cavity 4 is provided at one end of the shell 2 close to the arc extinguishing device 3, and an exhaust component 5 is provided in the installation cavity, and the exhaust component 5 is used to reduce the pressure in the shell 2, and a partition is also provided between the arc extinguishing device 3 and the exhaust component 5, and a first channel 6 is provided on the partition, and the exhaust component includes a first plug 51, a sealing buckle 52 and a second plug 53, the sealing buckle 52 is located between the first plug 51 and the second plug 53, and the second plug 53 is arranged close to the side of the arc extinguishing device 3, and a plurality of ventilation holes 531 are provided on the first plug 51 and the second plug 53. In this embodiment, the first plug and the second plug have the same shape and are equal in size.
[0024] From the above method, it can be known that due to the provision of the exhaust component 5, the exhaust component 5 can effectively reduce the damage of the internal pressure to the housing 2, ensuring the optimal air-blowing arc-extinguishing effect. In addition, selecting different insert structures can improve the protection level of the product.
[0025] Specifically, Figure 7 As shown, the first plug-in piece 51 includes a first plug-in piece body, which is rectangular. In actual use, the shape of the first plug-in piece body can also be other shapes, which are not limited to the specific ones. The first plug-in piece is also provided with a plurality of exhaust holes 511, and the two sides of the first plug-in piece body corresponding to the two sides of the sealing buckle 52 for installing the first plug-in piece 51 are also provided with first installation grooves 521. During assembly, the two sides of the first plug-in piece 51 are inserted into the first installation grooves 521 to ensure that the first plug-in piece 51 can be firmly installed in the installation. In this embodiment, the first plug-in piece 51 plays the role of support, exhaust and arc extinguishing.
[0026] In addition, it is worth noting that Figure 8 As shown, the exhaust assembly also includes a third plug 54, and the main function of the third plug 54 is insulation and sealing. In actual use, the third plug 54 can be installed or not according to actual needs. When the third plug 54 needs to be installed, in this embodiment, the third plug is located on the side of the first plug away from the sealing buckle. Specifically, the third plug 54 includes a third plug body, and first fixing blocks 541 are provided on both sides of the third plug body. Second claws 522 are reserved for installing the third plug on both sides of the sealing buckle 52 where the third plug 54 is installed, and the third plug 54 is firmly fixed to the sealing buckle 52 by the second claws 522.
[0027] like Figure 4 As shown, the sealing buckle 52 includes a fixing plate, side plates 523 are provided on both sides of the fixing plate, a top plate 524 is provided on the upper end of the fixing plate, and a bottom plate is provided on the lower end of the fixing plate. The side plates, the top plate and the bottom plate are fixed to the fixing plate by an integral molding method. At least one second channel 525 is provided on the fixing plate. In this embodiment, when there is only one second channel 525, the inner diameter of the second channel 525 is set as Fig. 9 As shown, the second passage 525 is enlarged, thereby increasing the cross-section of the second passage 525. When the pressure inside the shell 2 is too high, the gas can quickly enter the exhaust assembly 5 through the second passage 525, ensuring that the shell 2 will not be damaged due to excessive internal air pressure.
[0028] In order to ensure that the sealing buckle 52 can be firmly fixed, a first claw 526 is further provided at the lower part of the base plate, and a mounting hole is further provided at the bottom of the mounting cavity corresponding to the first claw 526. The first claw 526 cooperates with the mounting hole 41, so that the sealing buckle can be firmly installed in the mounting cavity, avoiding deformation due to external force and extending the service life.
[0029] In addition, in this embodiment, the first plug 51 and the second plug 53 are made of insulating material or metal material, and the third plug 54 is made of insulating material. The materials of the first plug 51 and the second plug 53 are set according to actual needs, and can be both insulating materials or both metal materials, or one can be insulating material and the other can be metal material, and the specific requirements are not limited.
[0030] In addition, it should be noted that in order to firmly install the sealing buckle 52 in the installation cavity 4, in this embodiment, the two sides of the installation cavity 4 are also provided with a slot for installing the exhaust component, and the two sides of the exhaust component 5 are installed in the slot, and the top plate of the sealing buckle 52 is fixed to the upper part of the installation cavity by a fixing part.
[0031] During actual assembly, first insert the first plug piece 51 into the first installation groove of the sealing buckle, insert the third plug piece 54 on the outside of the first plug piece 51, and insert the second plug piece 53 on the other side of the sealing buckle 52. Install the exhaust component 5 along the shell slot so that the side panels on both sides of the sealing buckle 52 are installed in the shell slot, and continue to install along the slot until the first claw 526 of the sealing buckle 52 is inserted into the installation hole 41. At this point, the exhaust component 5 is installed in place.
[0032] In normal working state, the pressure inside the cavity where the arc extinguishing device 3 of the housing 2 is located is the same as the pressure outside, and the pressure on both sides of the third plug 54 is the same. When a large current is interrupted, the internal pressure at the position of the arc extinguishing device 3 increases due to the arc, and a pressure difference is formed on both sides of the third plug 54. When the pressure reaches a certain level, the third plug 54 is deformed by force, and the limiting effect of the second claw 522 on the third plug 54 fails. The third plug 54 is separated from the sealing buckle 52, and the exhaust channel is opened. The high-pressure gas at the position of the arc extinguishing device 3 is verified, and the first channel 6 and the second channel 5255 are discharged. When part of the arc flies out, it passes through the second plug 53 (made of metal at this time) and the first plug 51 (made of metal at this time) in sequence, and the arc is gradually extinguished.
[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.
Claims
1. An exhaust structure, characterized in that: It includes a base and a shell, the shell is located at the upper part of the base, the line inlet end of the shell is provided with a accommodating cavity, the accommodating cavity is provided with an arc extinguishing device, at least one installation cavity is opened at one end of the shell close to the arc extinguishing device, an exhaust component is arranged in the installation cavity, the exhaust component is used to reduce the pressure in the shell, a partition is also provided between the arc extinguishing device and the exhaust component, a first channel is opened on the partition, the exhaust component includes a first plug, a sealing buckle and a second plug, the sealing buckle is located between the first plug and the second plug, the second plug is arranged close to the side of the arc extinguishing device, and a plurality of ventilation holes are provided on the first plug and the second plug.
2. The exhaust structure according to claim 1, characterized in that: The exhaust assembly also includes a third plug-in sheet, and the third plug-in sheet is located on a side of the first plug-in sheet away from the sealing buckle.
3. The exhaust structure according to claim 2, characterized in that: The first plug-in piece comprises a first plug-in piece body, first fixing blocks are provided on both sides of the first plug-in piece body, and first mounting grooves are provided on both sides of the sealing buckle for mounting the first plug-in piece.
4. The exhaust structure according to claim 2, characterized in that: The third plug-in piece comprises a third plug-in piece body, and first fixing blocks are arranged on both sides of the third plug-in piece body. Second claws are arranged on both sides of the sealing buckle for installing the third plug-in piece and reserved for installing the third plug-in piece.
5. The exhaust structure according to claim 4, characterized in that: The sealing buckle includes a fixing plate, side plates are provided on both sides of the fixing plate, a top plate is provided at the upper end of the fixing plate, a bottom plate is provided at the lower end of the fixing plate, and at least one second channel is provided on the fixing plate.
6. The exhaust structure according to claim 5, characterized in that: A first clamping claw is also provided at the lower part of the bottom plate, and a mounting hole is also provided at the bottom of the mounting cavity corresponding to the mounting of the first clamping claw, and the first clamping claw cooperates with the mounting hole.
7. The exhaust structure according to claim 1, characterized in that: The first plug-in piece and the second plug-in piece are made of insulating material or metal material, and the third plug-in piece is made of insulating material.
8. The exhaust structure according to claim 1, characterized in that: The two sides of the installation cavity are also provided with slots for installing the exhaust assembly, and the two sides of the exhaust assembly are installed in the slots.
9. The exhaust structure according to claim 5, characterized in that: The top plate of the sealing buckle is fixed to the upper part of the installation cavity through a fixing member.
10. A circuit breaker, comprising an exhaust structure, characterized in that: The exhaust structure is the same as the exhaust structure described in any one of claims 1 to 9.