Arc extinguish chamber protection cover

Abstract

The utility model provides an arc extinguish chamber protection cover which is located above an arc extinguish chamber of one pole of a circuit breaker, at least one partition plate is arranged in the protection cover, and the partition plate divides an inner cavity of the protection cover into at least two gas channels. Therefore, gas in an arc extinguish chamber of one pole of the circuit breaker can be shunted in the protective cover by the partition plate. A partition plate and a silk screen are arranged in the protection cover, and the cooling effect is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of low-voltage circuit breaker, specifically relates to an arc-extinguishing chamber protective cover. BACKGROUND

[0002] In the industrial low-voltage power system, the circuit breaker is an important component in the distribution network, used to distribute power, connect and disconnect the current in the power grid circuit and protect the line and power supply equipment from the damage of overload, under-voltage, short circuit, single-phase grounding and other faults, and is an important component of the power supply system.

[0003] When a fault occurs in the circuit, the circuit breaker monitors that the current value exceeds the set predetermined protection current value, triggers the operating mechanism to act, and makes the moving and static contacts break quickly, thereby disconnecting the circuit. However, during the breaking process, the voltage and current values are too large, causing the moving and static contacts to generate arc during the breaking process, and the electric field is too strong, causing the internal gas of the circuit breaker to be highly ionized, generating a large amount of free metal ions. If these free metal particles fly out of the circuit breaker, they may cause short circuit and burning of the surrounding lines, thereby causing disaster.

[0004] In the prior art, the ion elimination structure is directly combined by using a hole plate and a wire mesh, but this traditional structure has low heat exchange efficiency and serious arc flying. After the high-speed hot fluid passes through the hole plate, the contact area with the wire mesh is limited, the effective heat exchange area is reduced, and the cooling effect is poor. At the same time, the fluid in the cavity of the protective cover mainly flows out from both sides of the top cover, the hot fluid cannot be fully cooled, and the zero arc flying effect is reduced. UTILITY MODEL CONTENTS

[0005] The utility model aims at the defect that the fluid in the cavity of the protective cover in the existing arc-extinguishing chamber ion elimination structure mainly flows out from both sides of the top cover, the hot fluid cannot be fully cooled, and the zero arc flying effect is reduced, and provides an arc-extinguishing chamber protective cover, which is provided with a partition plate and a wire mesh in the protective cover to further improve the cooling effect.

[0006] TECHNICAL SCHEME

[0007] In order to achieve the above technical purpose, the utility model provides an arc-extinguishing chamber protective cover, characterized in that: the protective cover is located above the arc-extinguishing chamber of one pole of the circuit breaker, at least one partition plate is arranged in the protective cover, and the partition plate divides the inner cavity of the protective cover into not less than two gas passages, so that the gas of the arc-extinguishing chamber of one pole of the circuit breaker can be shunted in the protective cover by the partition plate.

[0008] In one embodiment, the partition plate divides the inner cavity of the protective cover into not less than two gas passages, so that the gas of the arc-extinguishing chamber of one pole of the circuit breaker can be discharged from the gas outlet of the protective cover after being shunted by the partition plate.

[0009] In one of the embodiments, the gas passage is provided with a gas outlet, and a second heat exchange wire mesh is arranged at the gas outlet inside the protective cover to further cool the gas discharged from the protective cover.

[0010] In one of the embodiments, the number of the partition plates is two, and the two ends of the partition plates are connected to the top surface and the bottom surface of the protective cover to divide the inner cavity of the protective cover into vertically arranged vertical gas passages in the shape of a river.

[0011] In one of the embodiments, the number of the partition plates is two, and one end of the partition plates is connected to the bottom surface of the protective cover, and the other end of the partition plates is connected to the left side surface and the right side surface of the protective cover respectively, the partition plates divide the protective cover into a middle gas passage from which gas is discharged from the top surface and / or the rear end surface, a left gas passage from which gas is discharged from the left side surface and / or the rear end surface, and a right gas passage from which gas is discharged from the right side surface and / or the rear end surface, and the middle gas passage is in the shape of being wide at the top and narrow at the bottom.

[0012] In one of the embodiments, the partition plates are arc-shaped.

[0013] In one of the embodiments, the top surface and / or the rear end surface of the gas passage in the inner cavity of the protective cover is provided with a first gas outlet, the left and right side surfaces of the gas passage in the inner cavity of the protective cover are provided with a second gas outlet, and a second heat exchange wire mesh is arranged at the first gas outlet and the second gas outlet inside the protective cover to further cool the gas discharged from the protective cover.

[0014] In one of the embodiments, a first heat exchange wire mesh is arranged at the exhaust port of the arc-extinguishing chamber, and the gas inlet of the protective cover is installed outside the first heat exchange wire mesh.

[0015] In one of the embodiments, a gas speed reduction passage is arranged at the exhaust port of the arc-extinguishing chamber, and a first heat exchange wire mesh is connected to the gas outlet of the gas speed reduction passage.

[0016] In one of the embodiments, the gas speed reduction passage is in the shape of being wide at the top and narrow at the bottom.

[0017] Advantages

[0018] The utility model provides a kind of arc-extinguishing chamber protective cover, the protective cover is located the arc-extinguishing chamber above one pole of circuit breaker, at least one partition is provided in the protective cover, the partition separates the cavity in the protective cover into no less than two gas passages, so that the gas of the arc-extinguishing chamber of one pole of circuit breaker can be shunted by partition in the protective cover. Partition and wire mesh are arranged in the protective cover, to further improve cooling effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments will be simply introduced below, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0020] FIG. Figure 1 It is the arc-extinguishing chamber deionization structure schematic diagram in prior art;

[0021] FIG. Figure 2 It is the arc-extinguishing chamber deionization structure schematic diagram in the embodiments of the utility model Figure One ;

[0022] FIG. Figure 3 It is the arc-extinguishing chamber deionization structure schematic diagram in the embodiments of the utility model Figure Two ; DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely explained below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on another component or there can be a middle component. When a component is considered "connected" to another component, it can be directly connected to another component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the specification of the present application are for illustrative purposes only and do not represent the only implementation.

[0025] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered sequence. Thus, features referring to "first", "second" etc. can include at least one of the features, explicitly or implicitly.

[0026] In the present application, unless specifically stated and limited otherwise, the terms "on", "under", "above" and "below" are used in relation to the first feature "on", "under", "above" and "below" the second feature, which means that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature "on", "above" and "below" the second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature "under", "below" and "below" the second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0028] Embodiments

[0029] As shown in the accompanying drawings, Figure 1 In the prior art, the arc extinguishing structure is directly combined with the orifice plate and the wire mesh, but this traditional structure has low heat exchange efficiency and serious arc flight. The contact area of the high-speed hot fluid with the wire mesh is limited after passing through the orifice plate, the effective heat exchange area is reduced, and the cooling effect is poor. At the same time, the fluid in the cavity of the protective cover mainly flows out from both sides of the top cover, and the hot fluid cannot be fully cooled, which reduces the zero arc flight effect.

[0030] To solve this problem, the present embodiment provides an arc extinguishing chamber protective cover, which is located above the arc extinguishing chamber a of one pole of the circuit breaker, and at least one partition plate 2 is arranged in the protective cover 1. The partition plate 2 divides the inner cavity of the protective cover 1 into not less than two gas passages, so that the gas of the arc extinguishing chamber a of one pole of the circuit breaker can be shunted by the partition plate 2 in the protective cover 1. Further, the partition plate 2 divides the inner cavity of the protective cover 1 into not less than two gas passages, so that the gas of the arc extinguishing chamber a of one pole of the circuit breaker can be shunted by the partition plate 2 and discharged from the gas outlet of the protective cover 1.

[0031] Specifically, when one of the poles of the circuit breaker has one arc-extinguishing chamber, the protective cover 1 is located above the arc-extinguishing chamber a, so that the gas of the arc-extinguishing chamber a can be discharged from the protective cover 1 after being divided by the partition plate 2.

[0032] When one of the poles of the circuit breaker has multiple arc-extinguishing chambers, the protective cover 1 is located above the pole, so that the gas of the multiple arc-extinguishing chambers a of the pole can be discharged from the protective cover 1 after being divided by the partition plate 2.

[0033] When one of the poles of the circuit breaker is a pole formed by multiple poles in series or parallel, the protective cover 1 is located above one of the multiple poles, so that the gas of the multiple arc-extinguishing chambers a of the pole can be discharged from the protective cover 1 after being divided by the partition plate 2.

[0034] The components will be described in detail below in combination with the accompanying drawings:

[0035] The gas passage is provided with a gas outlet, and the second heat exchange wire mesh 3 provided at the gas outlet on the inner side of the protective cover 1 can further cool the gas discharged from the protective cover 1. Specifically, the top surface and / or the rear end surface of the gas passage in the inner cavity of the protective cover 1 are provided with a first gas outlet 101a, the left and right side surfaces of the gas passage in the inner cavity of the protective cover 1 are provided with a second gas outlet 102a, and the first gas outlet 101a and the second gas outlet 102a on the inner side of the protective cover 1 are provided with the second heat exchange wire mesh 3 to further cool the gas discharged from the protective cover 1. The number of the partition plates 2 is at least two. In this embodiment, the number of the partition plates 2 is two. The two ends of the partition plate 2 are connected to the top surface and the bottom surface of the protective cover 1, so as to divide the inner cavity of the protective cover 1 into vertical gas passages arranged in a horizontal direction and in the shape of a river.

[0036] Based on the principle of dividing by the partition plate 2, as shown in the accompanying drawings, Figure 2 The number of the partition plates 2 is two, and one end of the partition plate 2 is connected to the bottom surface of the protective cover 1, and the other end is connected to the left side surface and the right side surface of the protective cover 1, and the partition plate 2 is arc-shaped. The partition plate 2 divides the protective cover 1 into the middle gas passage 1a from which the gas is discharged from the top surface and / or the rear end surface, the left gas passage 1b from which the gas is discharged from the left side surface and / or the rear end surface, and the right gas passage 1c from which the gas is discharged from the right side surface and / or the rear end surface. The middle gas passage 1a is in the shape of being wide at the top and narrow at the bottom. As shown in the accompanying drawings, Figure 3As shown, the broken arc is extinguished by the arc extinguishing grid a2 in the arc extinguishing chamber a and is discharged from the exhaust port a1 of the arc extinguishing chamber a. The exhaust port a1 of the arc extinguishing chamber a is provided with a gas speed reduction channel 5, and the gas outlet of the gas speed reduction channel 5 is connected with a first heat exchange wire mesh 4. The gas inlet of the protective cover 1 is installed outside the first heat exchange wire mesh 4. The gas speed reduction channel is in the shape of wide at the top and narrow at the bottom, and specifically, the gas speed reduction channel 5 is a gradually expanding hole on the hole plate b provided at the exhaust port a1 of the arc extinguishing chamber a.

[0037] The utility model provides a kind of arc extinguishing chamber protective cover, the protective cover 1 is located the arc extinguishing chamber a of one of circuit breaker above, at least one partition plate 2 is provided in the protective cover 1, the partition plate 2 divides the cavity in protective cover 1 into no less than two gas passages, so that the gas of the arc extinguishing chamber a of one of circuit breaker can be shunted by partition plate 2 in protective cover 1.

[0038] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0039] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A protective cover for an arc-extinguishing chamber, characterized in that: The protective cover (1) is located above the arc-extinguishing chamber (a) of one pole of the circuit breaker. At least one partition plate (2) is provided inside the protective cover (1). The partition plate (2) divides the inner cavity of the protective cover (1) into no less than two gas channels, so that the gas in the arc-extinguishing chamber (a) of one pole of the circuit breaker can be diverted by the partition plate (2) inside the protective cover (1) and discharged from the gas outlet of the protective cover (1). The gas channel is provided with an air outlet, and a second heat exchange mesh (3) is provided at the air outlet inside the protective cover (1) to further cool the gas discharged from the protective cover (1).

2. The arc-extinguishing chamber protective cover as described in claim 1, characterized in that: There are two partition plates (2). The two ends of the partition plates (2) are connected to the top and bottom surfaces of the protective cover (1) to divide the inner cavity of the protective cover (1) into vertical gas channels arranged in a horizontal direction in a zigzag shape. The partition plates (2) divide the protective cover (1) into a middle gas channel (1a) from which gas is discharged from the top surface and / or the rear end surface, a left gas channel (1b) from which gas is discharged from the top surface and / or the left side and / or the rear end surface, and a right gas channel (1c) from which gas is discharged from the top surface and / or the right side and / or the rear end surface.

3. The arc-extinguishing chamber protective cover as described in claim 1, characterized in that: There are two partition plates (2). One end of each partition plate (2) is connected to the bottom surface of the protective cover (1), and the other end is connected to the left side and right side of the protective cover (1) respectively. The partition plate (2) divides the protective cover (1) into a middle gas channel (1a) from which gas is discharged from the top surface and / or the rear end surface, a left gas channel (1b) from which gas is discharged from the left side and / or the rear end surface, and a right gas channel (1c) from which gas is discharged from the right side and / or the rear end surface. The middle gas channel (1a) is wider at the top and narrower at the bottom.

4. The arc-extinguishing chamber protective cover as described in claim 3, characterized in that: The partition plate (2) is arc-shaped.

5. The arc-extinguishing chamber protective cover as described in claim 1, characterized in that: The top and / or rear end face of the gas channel inside the protective cover (1) are provided with a first air outlet (101a), and the left and right sides of the gas channel inside the protective cover (1) are provided with a second air outlet (102a). A second heat exchange mesh (3) is provided at the first air outlet (101a) and the second air outlet (102a) inside the protective cover (1) to further cool the gas discharged from the protective cover (1).

6. The arc-extinguishing chamber protective cover as described in claim 1, characterized in that: A first heat exchange wire mesh (4) is provided at the exhaust port (a1) of the arc-extinguishing chamber, and the gas inlet of the protective cover (1) is installed on the outside of the first heat exchange wire mesh (4).

7. The arc-extinguishing chamber protective cover as described in claim 6, characterized in that: A gas deceleration channel is provided at the exhaust port (a1) of the arc-extinguishing chamber (a), and a first heat exchange wire mesh (4) is connected to the gas outlet of the gas deceleration channel.

8. The arc-extinguishing chamber protective cover as described in claim 7, characterized in that: The gas deceleration channel is wider at the top and narrower at the bottom.

Images