Electronic metering circuit breaker with pressure relief function

Abstract

The utility model discloses an electronic metering circuit breaker with a pressure relief function, which comprises a base and an end cover, a plurality of arc extinguish chambers are formed by the end cover and a box cover of the base, a plurality of first pressure relief holes are formed in the arc extinguish chambers of the end cover, and a plurality of second pressure relief holes are formed in the end cover. A pressure relief plate is sequentially arranged at an inlet of the arc extinguish chamber, pressure relief cavities are arranged on two sides of the pressure relief plate, inclined flow guide portions are arranged on two sides of the middle of each pressure relief cavity, second pressure relief holes are arranged on two sides of each pressure relief cavity, and a plurality of staggered blocking portions are arranged between the second pressure relief holes and the flow guide portions. According to the utility model, the pressure relief cavity directly bears the impact of high-pressure gas, the tassel of the high-pressure gas is slowed down, the advancing distance of the high-pressure gas is prolonged through the blocking part, the flow velocity of the high-pressure gas is further slowed down, and the high-pressure gas in the arc extinguish chamber is quickly guided and discharged out of the arc extinguish chamber in order through the flow guide part and the drainage part. And the product has the advantages of pressure relief function and guiding function.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an electronic metering circuit breaker with a pressure relief function. Background Art

[0002] An electronic metering circuit breaker is a device that integrates the functions of an electronic leakage circuit breaker and an intelligent circuit breaker. It uses advanced electronic technology and intelligent control to achieve accurate circuit metering, leakage protection, overload and short-circuit protection.

[0003] Electronic metering circuit breakers primarily consist of a zero-sequence current transformer, an electronically controlled residual current release, and a circuit breaker with overload and short-circuit protection. When leakage or electric shock occurs in the protected circuit, the secondary winding of the zero-sequence current transformer outputs a signal as soon as the leakage current reaches the designed operating current value. This triggers the residual current release to operate the circuit breaker, thereby cutting off the power supply and providing protection against leakage and electric shock. Furthermore, these devices possess the characteristics of intelligent circuit breakers, such as fast response and precise control, effectively protecting circuits and equipment from overload and short-circuit damage.

[0004] Existing electronic metering circuit breakers include an arc extinguishing chamber equipped with multiple arc extinguishing grids. When the moving and stationary contacts disconnect, an arc is generated. This is due to the voltage difference and current between the contacts, which causes the air to be broken down by the high electric field, forming a conductive path. During this process, the contacts vibrate and weld, the air between the moving and stationary contacts is broken down by the high electric field, and the electrode material softens, melts, and evaporates. As the arcing progresses and spreads, the high-temperature arc gradually melts and even vaporizes the contact metal. This process is accompanied by the conversion and release of energy, forming high-pressure gas. Currently, the arc extinguishing chamber lacks effective guidance for this high-pressure gas, causing it to carry high-temperature, scorching particles and spray onto other components within the arc extinguishing chamber, reducing the service life of these components. Therefore, the applicant has developed a beneficial design and found a solution to this problem. The technical solution described below was developed in this context. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned traditional electronic metering circuit breaker design and provide a product with pressure relief function and guiding effect.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions.

[0007] An electronic metering circuit breaker with a pressure relief function comprises a base and an end cover, wherein the end cover and the base box cover form a plurality of arc extinguishing chambers, the arc extinguishing chamber of the end cover is provided with a plurality of first pressure relief holes, pressure relief plates are sequentially provided at the entrance of the arc extinguishing chamber, pressure relief cavities are provided on both sides of the pressure relief plates, inclined guide portions are provided on both sides of the middle of the pressure relief cavity, second pressure relief holes are provided on both sides of the pressure relief cavity, a plurality of mutually staggered blocking portions are provided between the second pressure relief holes and the guide portions, the arc extinguishing chamber is provided with a plurality of equally spaced arc extinguishing grids from top to bottom, a first arc baffle and a second arc baffle are sequentially provided above the arc extinguishing grid, the first arc baffle is provided with an inclined diversion portion for diverting high-pressure gas to the first pressure relief hole, and the diversion portion is arranged above the second arc baffle.

[0008] Preferably, the first arc baffle plate and the second arc baffle plate are provided with a plurality of third pressure relief holes, which are staggered with each other.

[0009] Preferably, the second arc blocking plate is provided with a curved arc blocking portion and is arranged at the entrance of the first pressure relief hole, and the arc blocking portion is provided with a fourth pressure relief hole.

[0010] Preferably, an arc blocking plate is further provided at the entrance of the arc extinguishing chamber, wherein the arc blocking plate is provided with a plurality of through holes and is arranged at the entrance of the pressure relief cavity.

[0011] Preferably, protrusions are provided on both sides of the pressure relief plate, the pressure relief cavity is arranged in the protrusions, and inclined reinforcement parts are provided on both sides of the pressure relief cavity.

[0012] Beneficial effects:

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The utility model directly bears the impact of high-pressure gas through the pressure relief chamber, slows down the flow rate of high-pressure gas, extends the travel distance of high-pressure gas through multiple blocking parts arranged in an interlaced manner, further slows down the flow rate of high-pressure gas, and discharges it through the second pressure relief hole. At the same time, the first pressure relief hole also plays a role in accelerating the discharge of high-pressure gas, so that the product has the advantage of pressure relief function.

[0015] (2) The utility model divides the high-pressure gas into two streams through the guide part, and discharges the gas in an orderly manner through the blocking part to the second pressure relief hole, thereby preventing the high-pressure gas from impacting the pressure relief chamber and generating turbulence; the high-pressure gas is guided to the first pressure relief hole in an orderly manner through the guide part, and the above design prevents the high-pressure gas from accumulating in the arc extinguishing chamber, so that the product has the advantage of a guiding function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic side cross-sectional view of the structure of an electronic metering circuit breaker with a pressure relief function according to the present invention;

[0017] Figure 2 For this utility model Figure 1 A partial enlarged diagram of an electronic metering circuit breaker with a pressure relief function;

[0018] Figure 3 This is a structural schematic diagram of a pressure relief plate of an electronic metering circuit breaker with a pressure relief function according to the present invention;

[0019] Figure 4 This is a schematic side cross-sectional structural diagram of a pressure relief plate of an electronic metering circuit breaker with a pressure relief function according to the present invention;

[0020] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0021] Figure numerals: 1. base; 2. end cover; 3. arc extinguishing chamber; 4. arc blocking plate; 5. pressure relief plate; 6. first arc blocking plate; 7. second arc blocking plate; 8. third pressure relief hole; 21. first pressure relief hole; 31. arc extinguishing grid; 41. through hole; 51. pressure relief cavity; 52. flow guide; 53. second pressure relief hole; 54. blocking portion; 55. reinforcement portion; 56. bump; 61. flow guide; 71. arc blocking portion; 72. fourth pressure relief hole. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0025] Reference example Figures 1 to 4An electronic metering circuit breaker with a pressure relief function includes a base 1 and an end cover 2. The end cover 2 and the base 1 cover form a plurality of arc extinguishing chambers 3. The arc extinguishing chamber 3 of the end cover 2 is provided with a plurality of first pressure relief holes 21. Pressure relief plates 5 are provided at the entrance of the arc extinguishing chamber 3 in sequence. Pressure relief cavities 51 are provided on both sides of the pressure relief plate 5. Inclined guide portions 52 are provided on both sides of the middle of the pressure relief cavity 51. Second pressure relief holes 53 are provided on both sides of the pressure relief cavity 51. Several interlaced blocking portions 54 are provided between the second pressure relief holes 53 and the guide portions 52. The arc extinguishing chamber 3 is provided with a plurality of equally spaced arc extinguishing grids 31 from top to bottom. A first arc baffle 6 and a second arc baffle 7 are provided above the arc extinguishing grid 31 in sequence. The first arc baffle 6 is provided with an inclined guide portion. 61, used for guiding high-pressure gas to the first pressure relief hole 21, the drainage portion 61 is arranged above the second arc baffle 7, when the moving contact is disconnected, high-pressure gas is generated at the moment, and the pressure relief chamber 51 will be directly subjected to the impact of the high-pressure gas, thereby slowing down the flow rate of the high-pressure gas in the pressure relief chamber 51, and the slowed high-pressure gas is transported to the blocking portion 54 through the guide portion 52. The travel path of the high-pressure gas is bent by the multiple blocking portions 54, which not only further reduces the flow rate of the high-pressure gas, but also extends the travel distance of the high-pressure gas. Finally, it is discharged through the second pressure relief hole 53, and the drainage portion 61 guides the high-pressure gas to the first pressure relief hole 21 in an orderly manner, cooperating with the second pressure relief hole 53 to accelerate the discharge speed of the high-pressure gas in the arc extinguishing chamber 3;

[0026] It is worth mentioning that the first arc baffle plate 6 and the second arc baffle plate 7 are provided with a plurality of third pressure relief holes 8, which are arranged in a staggered manner. The staggered third pressure relief holes 8 extend the travel path of the high-pressure gas and slow down the flow rate of the high-pressure gas flowing into the drainage portion 61. In addition, the first arc baffle plate 6 and the second arc baffle plate 7 also play a role in quickly extinguishing the arc that has not been extinguished by the arc quenching grid 31, thereby preventing the arc from flying out of the arc quenching chamber 3.

[0027] It is worth mentioning that the second arc-blocking plate 7 is provided with a curved arc-blocking portion 71 and is arranged at the entrance of the first pressure relief hole 21. The arc-blocking portion 71 is provided with a fourth pressure relief hole 72. The arc-blocking portion 71 prevents arcing from flying out of the arc-extinguishing chamber 3, and high-pressure gas can also be discharged to the first pressure relief hole 21 through the fourth pressure relief hole 72.

[0028] It is worth mentioning that an arc-blocking plate 4 is provided at the entrance of the arc-extinguishing chamber 3. The arc-blocking plate 4 has a plurality of through holes 41 and is arranged at the entrance of the pressure relief chamber 51. The arc-blocking plate 4 directly withstands arcing and high-temperature hot particles. High-pressure gas enters the pressure relief chamber 51 through the through holes 41.

[0029] It is worth mentioning that protrusions 56 are provided on both sides of the pressure relief plate 5, the pressure relief chamber 51 is arranged in the protrusion 56, and inclined reinforcement parts 55 are provided on both sides of the pressure relief chamber 51. Since the pressure relief chamber 51 directly bears the impact of high-pressure gas, the structural strength of the protrusion 56 and the pressure relief plate 5 is increased by the reinforcement part 55.

[0030] The above design scheme can enable the product to achieve the advantages of having pressure relief function and guiding effect.

[0031] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. An electronic metering circuit breaker with a pressure relief function, comprising a base (1) and an end cover (2), characterized in that: The end cover (2) and the base (1) box cover form a plurality of arc extinguishing chambers (3), the arc extinguishing chamber (3) of the end cover (2) is provided with a plurality of first pressure relief holes (21), pressure relief plates (5) are sequentially provided at the entrance of the arc extinguishing chamber (3), pressure relief cavities (51) are provided on both sides of the pressure relief plates (5), inclined guide portions (52) are provided on both sides of the middle of the pressure relief cavity (51), second pressure relief holes (53) are provided on both sides of the pressure relief cavity (51), and the second pressure relief holes (53) are provided on both sides of the pressure relief cavity (51). 3) and a plurality of mutually staggered blocking portions (54) are provided between the arc extinguishing chamber (3) and the guide portion (52); the arc extinguishing chamber (3) is provided with a plurality of equally spaced arc extinguishing grids (31) from top to bottom; a first arc baffle (6) and a second arc baffle (7) are sequentially provided above the arc extinguishing grids (31); the first arc baffle (6) is provided with an inclined guide portion (61) for guiding high-pressure gas to the first pressure relief hole (21); the guide portion (61) is provided above the second arc baffle (7).

2. The electronic metering circuit breaker with pressure relief function according to claim 1, characterized in that: The first arc baffle plate (6) and the second arc baffle plate (7) are provided with a plurality of third pressure relief holes (8), which are arranged in an interlaced manner.

3. The electronic metering circuit breaker with pressure relief function according to claim 2, characterized in that: The second arc blocking plate (7) is provided with a curved arc blocking portion (71) and is arranged at the entrance of the first pressure relief hole (21); the arc blocking portion (71) is provided with a fourth pressure relief hole (72).

4. The electronic metering circuit breaker with pressure relief function according to claim 3, characterized in that: An arc blocking plate (4) is also provided at the entrance of the arc extinguishing chamber (3). The arc blocking plate (4) is provided with a plurality of through holes (41) and is arranged at the entrance of the pressure relief cavity (51).

5. The electronic metering circuit breaker with pressure relief function according to claim 3 or 4, characterized in that: The pressure relief plate (5) is provided with protrusions (56) on both sides, the pressure relief cavity (51) is arranged in the protrusions (56), and the pressure relief cavity (51) is provided with inclined reinforcement parts (55) on both sides.

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