Deionization structure of arc extinguish chamber

Abstract

The utility model relates to a deionization structure of an arc extinguish chamber. A gas speed reduction channel is arranged at an exhaust port of the arc extinguish chamber. One side of the exhaust port of the arc extinguish chamber is provided with a gradually expanded hole plate for increasing the effective heat exchange area of the hot fluid and the silk screen; meanwhile, the partition plate and the silk screen are arranged in the protective cover, so that hot fluid flowing out of the arc extinguish chamber is shunted through the partition plate, the defects that the fluid only flows out of the top cover, the local flow speed is large, and the flashover distance is long are overcome, and the cooling effect is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, specifically relates to an arc-extinguishing chamber ionization elimination structure. 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 the circuit fails, the circuit breaker monitors that the current value exceeds the set predetermined protection current value, triggers the operating mechanism to act, and rapidly disconnects the moving and static contacts, thereby disconnecting the circuit. However, during the disconnecting process, the voltage and current values are too large, causing the moving and static contacts to generate arc during the disconnecting 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 ionized metal ions. If these ionized 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 ionization 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. The high-speed hot fluid has a limited contact area with the wire mesh after passing through the hole plate, the effective heat exchange area is reduced, and the cooling effect is poor. In order to ensure zero arc flying, several layers of hole plates and wire meshes are often arranged, but too many hole plates and wire meshes will cause the gas pressure in the arc-extinguishing chamber to be too high, affecting the breaking performance of the circuit breaker product. In addition, 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 flying effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at the defects of the existing arc-extinguishing chamber ionization elimination structure, and provides an arc-extinguishing chamber ionization elimination structure. A gradually expanding hole plate is arranged on one side of the exhaust port of the arc-extinguishing chamber to increase the effective heat exchange area of the hot fluid and the wire mesh. A partition plate and a wire mesh are arranged in the protective cover, so that the hot fluid flowing out of the arc-extinguishing chamber passes through the partition plate, avoiding the defects that the fluid only flows out from the top cover, the local flow rate is large, and the arc flying distance is long, and further improving the cooling effect.

[0006] TECHNICAL SCHEME

[0007] In order to achieve the above technical purpose, the utility model provides an arc-extinguishing chamber ionization elimination structure, characterized in that: a gas speed reduction channel is arranged at the exhaust port of the arc-extinguishing chamber.

[0008] The gas speed-reducing channel is at least one hole on at least one orifice plate, the at least one hole penetrates the at least one orifice plate, the at least one orifice plate is stacked side by side outside the exhaust port of the arc extinguishing chamber, and the aperture of the at least one hole on the at least one orifice plate close to one side of the exhaust port of the arc extinguishing chamber is smaller than the aperture of the at least one hole away from the other side of the exhaust port of the arc extinguishing chamber.

[0009] In one of the embodiments, a first heat exchange wire net is connected at the gas outlet of the gas speed-reducing channel, and a protective cover is arranged outside the first heat exchange wire net.

[0010] In one of the embodiments, a partition plate is arranged in the protective cover, the partition plate divides the inner cavity of the protective cover into no less than two gas channels, so that the gas after heat exchange by the first heat exchange wire net can be discharged from the exhaust port of the protective cover.

[0011] In one of the embodiments, the at least one hole is a gradually expanding hole.

[0012] In one of the embodiments, the cross section of the gradually expanding hole is trapezoidal.

[0013] In one of the embodiments, at least one gas collecting hole is arranged on the orifice plate corresponding to the at least one hole close to the exhaust port.

[0014] In one of the embodiments, the at least one gas collecting hole is a gradually shrinking hole.

[0015] In one of the embodiments, a second heat exchange wire net is further arranged at the exhaust port of the inner side of the protective cover to further cool the gas discharged from the protective cover.

[0016] In one of the embodiments, the number of the partition plates is two, the partition plates divide the inner cavity of the protective cover into vertical gas channels arranged in a shape of river in horizontal direction, the partition plates divide the protective cover into a middle gas channel from which the gas is discharged from the top surface and / or the rear end surface, a left gas channel from which the gas is discharged from the top surface and / or the left side surface and / or the rear end surface, and a right gas channel from which the gas is discharged from the top surface and / or the right side surface and / or the rear end surface.

[0017] In one of the embodiments, the number of the partition plates is two, the partition plates are arc-shaped, the partition plates divide the protective cover into a middle gas channel from which the gas is discharged from the top surface and / or the rear end surface, a left gas channel from which the gas is discharged from the left side surface and / or the rear end surface, and a right gas channel from which the gas is discharged from the right side surface and / or the rear end surface, and the middle gas channel is in a shape of being wide at the top and narrow at the bottom. Advantageous effects

[0018] The utility model provides a kind of arc extinguishing chamber extinction structure, the exhaust port of arc extinguishing chamber is provided with gas speed reduction channel.In the exhaust port side of arc extinguishing chamber, gradually expanding orifice plate is arranged to increase the effective heat exchange area of hot fluid and silk screen, and at the same time, partition plate and silk screen are arranged in protective cover, so that hot fluid flowing out from arc extinguishing chamber is shunted by partition plate, to avoid the defects that fluid only flows out from top cover, local flow rate is larger, and arc distance is far, 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 following will be briefly introduced to the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying creative labor, other related drawings can also be obtained according to these drawings.

[0020] ATTACHMENT Figure 1 It is the arc extinguishing chamber extinction structure schematic diagram in prior art;

[0021] ATTACHMENT Figure 2 It is the arc extinguishing chamber extinction structure schematic diagram in the utility model embodiment 1 Figure 1 ;

[0022] ATTACHMENT Figure 3 It is the arc extinguishing chamber extinction structure schematic diagram in the utility model embodiment 1 Figure 2 ;

[0023] ATTACHMENT Figure 4 It is the arc extinguishing chamber extinction structure schematic diagram in the utility model embodiment 2. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantage 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, 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 ordinary skilled person in the art without making creative labor belong to the scope of the present application.

[0025] It should be noted that when the component is referred to as "fixed to" or "provided with" 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 indicate the only implementation.

[0026] Furthermore, the terms "first", "second", etc. are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicating a recited technical feature to the exclusion of the other. It is therefore explicitly acknowledged that, within the scope of the present application, any of the features described "first", "second", etc., can be replaced by "second", "first" etc., or left out altogether.

[0027] In the present application, unless specifically stated and defined otherwise, a first feature "on", "under", "above" or "over" a second feature can mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature via an intermediate medium. Also, the first feature "above", "over" or "on" 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" or "underneath" 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.

[0028] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The use of the terms "and / or" in the description of the present application is intended to encompass the inclusion of either, or both, of the items in the list. Embodiments

[0029] As shown in the accompanying drawings, Figure 1 In the prior art, the ion elimination structure is directly combined with the use of a hole plate and a wire mesh, but this traditional structure has low heat exchange efficiency and serious arc flying. The contact area of the high-speed hot fluid with the wire mesh is limited after passing through the hole plate, the effective heat exchange area is reduced, and the cooling effect is poor. In order to ensure zero arc flying, several layers of hole plates and wire meshes are often arranged, but too many hole plates and wire meshes will cause the gas pressure in the arc extinguishing chamber to be too high, which affects the breaking performance of the circuit breaker product. In addition, 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 flying effect.

[0030] In order to solve the above problems, as shown in the accompanying drawings, Figure 2 and 3As shown, the present embodiment provides an arc-extinguishing chamber deionization structure, the arc-extinguishing chamber 1 is provided with a gas speed reduction channel at the exhaust port 101. The gas outlet of the gas speed reduction channel is connected with a first heat exchange wire mesh 2, and a protective cover 3 is arranged outside the first heat exchange wire mesh 2. Specifically, the gas speed reduction channel is at least one hole 501 on at least one hole plate 5, the at least one hole 501 penetrates the at least one hole plate 5, the at least one hole plate 5 is arranged side by side and stacked outside the exhaust port 101 of the arc-extinguishing chamber 1, and the aperture of the at least one hole 501 on the at least one hole plate 5 close to one side of the exhaust port 101 of the arc-extinguishing chamber 1 is smaller than the aperture of the at least one hole 501 away from the other side of the exhaust port 101 of the arc-extinguishing chamber 1. The at least one hole 501 is a gradually expanding hole. In the present embodiment, the at least one hole 501 is a gradually expanding hole gradually expanding from one side of the exhaust port 101 to the first heat exchange wire mesh 2 on the hole plate 5. The cross section of the gradually expanding hole is trapezoidal.

[0031] The protective cover 3 is provided with a partition plate 4, which divides the inner cavity of the protective cover 3 into not less than two gas channels, so that the gas after heat exchange by the first heat exchange wire mesh 2 can be discharged from the exhaust port 101 of the protective cover 3. Generally, the number of the partition plate 4 is 2, and the two ends of the partition plate 4 are connected to the top surface and the bottom surface of the protective cover 3, thereby dividing the inner cavity of the protective cover 3 into vertical gas channels arranged in a shape of river in horizontal direction. The partition plate 4 divides the protective cover 3 into a middle gas channel 3a discharging gas from the top surface and / or the rear end surface, a left gas channel 3b discharging gas from the top surface and / or the left side surface and / or the rear end surface, and a right gas channel 3c discharging gas from the top surface and / or the right side surface and / or the rear end surface. Further specifically, as shown in the drawings, the partition plate 4 is arranged in a shape of river in horizontal direction, and the partition plate 4 divides the protective cover 3 into a middle gas channel 3a discharging gas from the top surface and / or the rear end surface, a left gas channel 3b discharging gas from the left side surface and / or the rear end surface, and a right gas channel 3c discharging gas from the right side surface and / or the rear end surface. Figure 3 As shown, in the present embodiment, the number of the partition plate 4 is 2, one end of the partition plate 4 is connected to the bottom surface of the protective cover 3, and the other end is connected to the left side surface and the right side surface of the protective cover 3 respectively. The partition plate 4 is arc-shaped, and the partition plate 4 divides the protective cover 3 into a middle gas channel 3a discharging gas from the top surface and / or the rear end surface, a left gas channel 3b discharging gas from the left side surface and / or the rear end surface, and a right gas channel 3c discharging gas from the right side surface and / or the rear end surface. The middle gas channel 3a is in a shape of wide at the top and narrow at the bottom. The inner side of the protective cover 3 is further provided with a second heat exchange wire mesh 6 to further cool the gas discharged from the protective cover 3. The protective cover can be applied to the case that each single pole of the switch includes one arc-extinguishing chamber, and the arc-extinguishing chamber is provided with a protective cover on the upper side. The protective cover can also be applied to the case that each single pole of the switch includes at least two arc-extinguishing chambers arranged side by side, and each arc-extinguishing chamber is provided with a protective cover on the upper side.

[0032] The arc after breaking is extinguished by the arc-extinguishing grid 1a in the arc-extinguishing chamber 1 and discharged from the exhaust port 101 of the arc-extinguishing chamber 1, and then passes through the deionization structure in the present embodiment to realize zero flying arc. Example

[0033] As attached Figure 4 As shown, at least one gas collecting hole 502 is provided on the orifice plate 5 on the side close to the exhaust port 101 corresponding to the at least one hole 501. The at least one gas collecting hole 502 is a tapered hole on the orifice plate 5 that gradually shrinks from the exhaust port 101 side to the first heat exchange screen 2 side. In this embodiment, after the disconnected arc passes through the arc extinguishing grid 1a in the arc extinguishing chamber 1 and is extinguished, it is discharged from the exhaust port 101 of the arc extinguishing chamber 1, collects gas through the gas collecting hole 502, and then decelerates through the gradually expanding hole, passes through the first heat exchange screen 2 for heat exchange, and then enters the protective cover. In this embodiment, an exhaust channel 102 can also be provided between the gradually expanding hole and the gas collecting hole 502 to further facilitate gas cooling. The other structures are the same as those in Example 1.

[0034] This embodiment provides an arc extinguishing chamber deionization structure, wherein a gas deceleration channel is provided at the exhaust port 101 of the arc extinguishing chamber 1. A gradually expanding plate is provided on one side of the exhaust port of the arc extinguishing chamber to increase the effective heat exchange area between the hot fluid and the wire mesh. A partition plate and wire mesh are also provided within the protective cover to divert the hot fluid flowing out of the arc extinguishing chamber through the partition plate, thereby avoiding the drawbacks of the fluid flowing only out of the top cover, resulting in high local flow velocity and long arcing distance, and further improving the cooling effect.

[0035] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An arc- extinguishing chamber deionization structure, characterized by: The exhaust port (101) of the arc extinguishing chamber (1) is provided with a gas speed reduction channel. The gas speed reduction channel is at least one hole (501) on at least one orifice plate (5), the at least one hole (501) penetrates the at least one orifice plate (5), the at least one orifice plate (5) is arranged side by side and stacked outside the exhaust port (101) of the arc extinguishing chamber (1), and the aperture of the at least one hole (501) on the at least one orifice plate (5) close to one side of the exhaust port (101) of the arc extinguishing chamber (1) is smaller than the aperture of the at least one hole (501) away from the other side of the exhaust port (101) of the arc extinguishing chamber (1).

2. The structure of the arc extinguishing chamber and the ionization structure according to claim 1, characterized in that: The gas outlet of the gas speed reduction channel is connected with a first heat exchange wire mesh (2), and a protective cover (3) is arranged outside the first heat exchange wire mesh (2).

3. The structure of the arc extinguishing chamber and the ionization structure according to claim 2, characterized in that: A partition plate (4) is arranged in the protective cover (3), the partition plate (4) divides the inner cavity of the protective cover (3) into no less than two gas channels, so that the gas after heat exchange by the first heat exchange wire mesh (2) can be discharged from the exhaust port of the protective cover (3).

4. The structure of the arc extinguish chamber and the ionization structure of claim 1, wherein: The at least one hole (501) is a gradually expanding hole.

5. The structure of the arc extinguishing chamber and the ionization structure according to claim 4, characterized in that: The cross section of the gradually expanding hole is trapezoidal.

6. The structure of the arc extinguish chamber and the ionization structure as claimed in claim 1, wherein: At least one gas collecting hole (502) is arranged on the orifice plate (5) corresponding to the at least one hole (501) close to the exhaust port (101).

7. The structure of the arc extinguishing chamber and the ionization structure according to claim 6, characterized in that: The at least one gas collecting hole (502) is a gradually tapering hole.

8. The structure of the arc extinguish chamber and the ionization structure as claimed in claim 3, wherein: A second heat exchange wire mesh (6) is further arranged at the exhaust port of the inner side of the protective cover (3) to further cool the gas discharged from the protective cover (3).

9. The structure of the arc extinguish chamber and the ionization structure as claimed in claim 3, wherein: The number of the partition plates (4) is two, the partition plates (4) divide the inner cavity of the protective cover (3) into vertical gas channels arranged in a shape of river in the horizontal direction, the partition plates (4) divide the protective cover (3) into a middle gas channel (3a) from which the gas is discharged from the top surface and / or the rear end surface, a left gas channel (3b) from which the gas is discharged from the top surface and / or the left side surface and / or the rear end surface, and a right gas channel (3c) from which the gas is discharged from the top surface and / or the right side surface and / or the rear end surface.

10. The structure of the arc extinguish chamber and the ionization structure as claimed in claim 3, wherein: The number of the partition plates (4) is two, the partition plates (4) are arc-shaped, the partition plates (4) divide the protective cover (3) into a middle gas channel (3a) from which the gas is discharged from the top surface and / or the rear end surface, a left gas channel (3b) from which the gas is discharged from the left side surface and / or the rear end surface, and a right gas channel (3c) from which the gas is discharged from the right side surface and / or the rear end surface, and the middle gas channel (3a) is in the shape of being wide at the top and narrow at the bottom.

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