Arc extinguishing structure of switch and switch

Abstract

The utility model relates to an arc extinguishing structure of a switch and the switch, and relates to the technical field of electrical equipment. And the arc extinguishing structure is arranged at the side part of the contact structure. The arc extinguishing structure comprises two magnetic conductive plates and / or two gas production sheets. The two magnetic conductive plates are oppositely arranged, and the contact structure is located between the two magnetic conductive plates. The two gas generating pieces are oppositely arranged, and the contact structure is located between the two gas generating pieces. Wherein the two magnetic conductive plates are arranged at an angle, and the two gas production sheets are arranged at an angle. The arc extinguishing structure provided by the utility model can solve the problem of poor arc extinguishing effect of a magnetic quenching structure and an air quenching structure in the prior art.

Description

Technical Field

[0001] This application relates to the technical field of electrical equipment, and more specifically, to an arc extinguishing structure and a switch of a switch. Background Art

[0002] In switchgear, a high-temperature arc will be generated between the moving contact and the static contact during the opening and closing process of the switch contacts. The high-temperature arc will not only damage the contacts but also affect the normal operation of the switch.

[0003] In the prior art, an arc extinguishing structure is usually provided at the closing position of the moving contact and the static contact, which generally includes a magnetic blow arc extinguishing structure or a gas blow arc extinguishing structure. Among them, the magnetic blow arc extinguishing structure generally has two relatively arranged magnetic conductors, and the magnetic field generated by the magnetic conductors pulls the arc towards the arc extinguishing chamber for arc extinguishing. The gas blow arc extinguishing structure is generally set as a gas generating piece, and the gas generating piece generates gas under the action of the high-temperature arc, and the arc is blown during the process of gas flow for arc extinguishing.

[0004] However, when the above arc extinguishing structure is used, due to the space limitation between the contact structure and the arc extinguishing chamber, there is usually a certain distance between the contact structure and the arc extinguishing chamber. When the magnetic field generated by the magnetic conductor pulls the arc, the pulling distance is limited. In order to increase the electrodynamic force of the magnetic field, a special magnetic blow coil usually needs to be set, and the setting of the magnetic blow coil not only occupies the space inside the switch but also increases the cost. At the same time, when the gas generating piece is used, the gas flow directions are inconsistent, resulting in a poor blowing effect on the arc, and thus a poor arc extinguishing effect. Summary of the Utility Model

[0005] The purpose of this application is to provide an arc extinguishing structure and a switch of a switch, and this arc extinguishing structure can solve the problem of poor arc extinguishing effect of the magnetic blow arc extinguishing structure and the gas blow arc extinguishing structure in the prior art.

[0006] To achieve the above purpose, according to the first aspect of this application, an embodiment of this application provides an arc extinguishing structure of a switch, and this arc extinguishing structure is arranged on the side of the contact structure. The arc extinguishing structure includes two magnetic conductor plates and / or two gas generating pieces. The two magnetic conductor plates are arranged relatively, and the contact structure is located between the two magnetic conductor plates. The two gas generating pieces are arranged relatively, and the contact structure is located between the two gas generating pieces. Among them, the two magnetic conductor plates are arranged at an angle, and the two gas generating pieces are arranged at an angle.

[0007] Based on the above embodiments of the present application, the arc extinguishing structure is arranged on both sides of the contact structure to extinguish the arc when the contact structure is switched on and off. Specifically, a magnetic blowout arc extinguishing structure is formed by arranging two magnetic conduction plates, and a gas blowout arc extinguishing structure is formed by arranging two gas generating sheets. In use, the magnetic blowout arc extinguishing structure and the gas blowout arc extinguishing structure can be arranged alternatively, or can be arranged simultaneously. By arranging the two magnetic conduction plates at an angle, compared with the way of arranging the two magnetic conduction plates in parallel, when the two magnetic conduction plates are arranged at an angle, they gradually approach each other, and the magnetic induction lines have the property of shortening the length with force. When the magnetic induction lines pass through the magnetic conduction structure, the magnetic induction lines become shorter. Therefore, by arranging the two magnetic conduction plates to approach each other, the magnetic induction lines can be guided to form at one end where the two magnetic conduction plates approach each other, thereby pulling the arc towards one end where the two magnetic conduction plates approach each other, thus enhancing the pulling ability for the arc. In addition, by arranging the two gas generating sheets at an angle, the two gas generating sheets form a structure similar to a funnel shape, which can play a role in collecting and guiding the flow direction of the gas, thereby enhancing the gas blowout arc extinguishing effect.

[0008] In some embodiments, the arc extinguishing structure includes two magnetic conduction plates and two gas generating sheets. The two magnetic conduction plates form a first funnel structure, and the two gas generating sheets form a second funnel structure. The opening directions of the first funnel structure and the second funnel structure are opposite.

[0009] Based on the above embodiments of the present application, when the magnetic conduction plate and the gas generating sheet are arranged simultaneously, the magnetic blowout arc extinguishing structure formed by the two magnetic conduction plates can pull the arc towards the direction where the two magnetic conduction plates approach each other, that is, the side opposite to the opening direction of the first funnel structure. The gas blowout arc extinguishing structure formed by the two gas generating sheets can blow the arc towards the direction where the two gas generating sheets are away from each other, that is, the opening direction of the second funnel structure. Therefore, by arranging the opening directions of the first funnel structure and the second funnel structure to be opposite, the pushing directions of the magnetic blowout arc extinguishing structure and the gas blowout arc extinguishing structure on the arc can be the same, thereby improving the arc extinguishing effect.

[0010] In some embodiments, the arc extinguishing structure further includes an arc extinguishing chamber.

[0011] Based on the above embodiments of the present application, through the arrangement of the arc extinguishing chamber, the arc extinguishing effect can be further enhanced.

[0012] In some embodiments, the opening direction of the first funnel structure faces away from the arc extinguishing chamber.

[0013] Based on the above embodiments of the present application, when the magnetic blowout arc extinguishing structure formed by the two magnetic conduction plates pulls the arc, it pulls the arc towards the side opposite to the opening direction of the first funnel structure. By setting the opening direction of the first funnel structure to face away from the arc extinguishing chamber, the arc can be pulled towards the arc extinguishing chamber, and the arc completes the extinguishing process in the arc extinguishing chamber, thereby improving the arc extinguishing effect.

[0014] In some embodiments, the opening direction of the second funnel structure faces towards the arc extinguishing chamber.

[0015] Based on the above embodiments of the present application, when the air-blowing arc extinguishing structure composed of two gas-generating sheets blows the arc, the arc is blown towards the side in the opening direction of the second funnel structure. By setting the opening direction of the second funnel structure towards the arc extinguishing chamber, the arc can be blown towards the arc extinguishing chamber, and the arc extinguishing process is completed in the arc extinguishing chamber, thereby improving the arc extinguishing effect.

[0016] In some embodiments, the arc extinguishing structure includes two magnetic conductive plates and two gas-generating sheets, and the two gas-generating sheets are arranged between the two magnetic conductive plates.

[0017] Based on the above embodiments of the present application, by arranging the two gas-generating sheets between the two magnetic conductive plates, since the magnetic conductive plates rely on the formed magnetic field to pull the arc, arranging the gas-generating sheets between the two magnetic conductive plates will not affect the pulling effect of the magnetic-blowing arc extinguishing structure on the arc. At the same time, arranging the two gas-generating sheets between the two magnetic conductive plates can make full use of the space inside the switch, improve the space utilization rate, thereby reducing the volume of the switch and lowering the cost.

[0018] In some embodiments, the included angle formed by the two magnetic conductive plates is α1, and α1 ≤ 90°.

[0019] Based on the above embodiments of the present application, by restricting the angles of the two magnetic conductive plates, when the dimension in the length direction of the magnetic conductive plates is certain, the larger the included angle between the two magnetic conductive plates, the wider the overall width of the first funnel structure formed by the two magnetic conductive plates will be, which will further affect the overall width of the switch, resulting in an increase in the volume of the switch and an increase in cost.

[0020] In some embodiments, the included angle formed by the two gas-generating sheets is α2, and α2 ≤ 90°.

[0021] Based on the above embodiments of the present application, when the included angle between the two gas-generating sheets is too large, it will not only affect the width of the second funnel structure and thus affect the overall volume of the switch structure, but also when the included angle between the two gas-generating sheets is too large, the current-collecting effect of the second funnel structure formed by the two gas-generating sheets will become worse, thereby reducing the blowing effect on the arc and affecting the overall arc extinguishing effect of the arc extinguishing structure.

[0022] According to the second aspect of the present application, a switch is provided, which includes a housing, a contact structure, and the above-mentioned arc extinguishing structure. The contact structure is arranged inside the housing, the arc extinguishing structure is arranged inside the housing, and the arc extinguishing structure is located on both sides of the contact structure.

[0023] Based on the above embodiments of the present application, the switch provided by the present application includes the arc extinguishing structure of the above-mentioned switch, and the arc extinguishing effect on the arc generated at the opening and closing positions of the contact structure inside the switch is improved through the setting of the above-mentioned arc extinguishing structure.

[0024] In some embodiments, the contact structure includes a moving contact and a stationary contact. The open end of the first funnel structure is located on both sides of the closing position of the moving contact and the stationary contact, and the contracting end of the second funnel structure is located on both sides of the closing position of the moving contact and the stationary contact.

[0025] Based on the above embodiments of the present application, the magnetic blowout arc extinguishing structure formed by the magnetic conduction plate and the gas blowout arc extinguishing structure formed by the gas generating sheet cooperate with each other to improve the arc extinguishing effect.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments section. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application, but do not constitute a limitation to the present application. In the drawings:

[0028] Figure 1 is a schematic structural diagram of a switch contact in the prior art.

[0029] Figure 2 is in the prior art Figure 1 a schematic diagram of the magnetic induction lines and the gas blowing direction in area A.

[0030] Figure 3 is in the prior art Figure 1 a schematic diagram of the magnetic induction lines and the gas blowing direction in area B.

[0031] Figure 4 is a schematic structural diagram of a switch provided by an embodiment of the present application.

[0032] Figure 5 is a schematic internal structure diagram of a switch provided by an embodiment of the present application.

[0033] Figure 6 is provided by an embodiment of the present application Figure 5 a schematic diagram of the magnetic induction lines and the gas blowing direction in area C.

[0034] Figure 7 is provided by an embodiment of the present application Figure 5 a schematic diagram of the magnetic induction lines and the gas blowing direction in area D.

[0035] DESCRIPTION OF THE REFERENCE NUMERALS

[0036] 1. Magnetic conduction plate; 11. First funnel structure; 2. Gas generating sheet; 21. Second funnel structure; 3. Contact structure; 31. Moving contact; 32. Stationary contact; 4. Arc extinguishing chamber; 5. Magnetic conductor; 6. Gas generating structure; 7. Housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Usually, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0039] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present application, it should be noted that unless otherwise stated, the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] In a switching device, during the opening and closing process of the switch contacts, a high-temperature arc will be generated between the moving contact and the static contact. The high-temperature arc will not only damage the contacts, but also affect the normal operation of the switch.

[0044] In the prior art, as shown in reference Figure 1 As shown in Figure 1 , an arc extinguishing structure is usually provided at the closing position of the moving contact and the static contact. Specifically, it generally includes a magnetic blow arc extinguishing structure or a gas blow arc extinguishing structure. Among them, the magnetic blow arc extinguishing structure generally includes two oppositely arranged magnetic conductors 5, and the magnetic field generated by the magnetic conductors 5 pulls the arc towards the arc extinguishing chamber for arc extinguishing. The gas blow arc extinguishing structure is generally set as a gas generating structure 6, and the gas generating structure 6 generates gas under the erosion of the high-temperature arc, and the arc is blown during the flow of the gas for arc extinguishing.

[0045] However, when the above arc extinguishing structure is used, due to the space limitation between the contact structure and the arc extinguishing chamber, there is usually a certain distance between the contact structure and the arc extinguishing chamber. When the magnetic field generated by the magnetic conductor 5 pulls the arc, the pulling distance is limited. In order to increase the electrodynamic force of the magnetic field, a special magnetic blow coil usually needs to be set, and the setting of the magnetic blow coil not only occupies the space inside the switch, but also increases the cost. At the same time, when the gas generating structure 6 is used, the gas flow directions are inconsistent, resulting in a poor blowing effect on the arc and a poor arc extinguishing effect.

[0046] Specifically, as shown in reference Figure 2 and Figure 3 As shown in Figure 3 , among them, Figure 2 Figure 2 shows the schematic diagram of the magnetic induction lines between the two magnetic conductors 5 at the closing and opening positions near the contact mechanism, that is, at the position of area A in Figure 1 , and at the same time shows the gas blowing directions of the two gas generating structures 6 at the position of area A. Figure 1 Figure 1 shows the schematic diagram of the magnetic induction lines between the two magnetic conductors 5 at the closing and opening positions near the contact mechanism, that is, at the position of area A in Figure 1 , and at the same time shows the gas blowing directions of the two gas generating structures 6 at the position of area A. Figure 3 Figure 3 shows the schematic diagram of the magnetic induction lines between the two magnetic conductors 5 at the middle position of the arc extinguishing structure, that is, at the position of area B in Figure 1 , and at the same time shows the gas blowing directions of the two gas generating structures 6 at the position of area B. Figure 1 Figure 1 shows the schematic diagram of the magnetic induction lines between the two magnetic conductors 5 at the middle position of the arc extinguishing structure, that is, at the position of area B in Figure 1 , and at the same time shows the gas blowing directions of the two gas generating structures 6 at the position of area B.

[0047] Referring to the above schematic diagram, it can be seen that since the magnetic induction lines will become shorter when passing through the magnetic conductor 5, and the magnetic induction lines tend to shorten their own lengths, the magnetic field will pull the arc towards the direction close to the two magnetic conductors 5 at the closing and opening positions near the magnetic conductor 5. However, when the arc is pulled to the middle position between the two magnetic conductors 5, the distance between the two magnetic conductors 5 remains constant at this time, so the magnetic induction lines also tend to be constant, and the pulling effect of the magnetic field on the arc weakens. At the same time, since the distance between the two gas generating structures 6 remains constant, the gas generated by the two gas generating structures 6 can flow in all directions, so the blowing effect on the arc is also weak.

[0048] To solve the above problems in the prior art, according to the first aspect of the present application, the embodiments of the present application provide an arc extinguishing structure for a switch, as shown in reference Figures 4 to 7As shown, the arc extinguishing structure is arranged on the side of the contact structure 3. The arc extinguishing structure includes two magnetic conduction plates 1 and / or two gas generating sheets 2. The two magnetic conduction plates 1 are arranged oppositely, and the contact structure 3 is located between the two magnetic conduction plates 1. The two gas generating sheets 2 are arranged oppositely, and the contact structure 3 is located between the two gas generating sheets 2. Among them, the two magnetic conduction plates 1 are arranged at an angle, and the two gas generating sheets 2 are arranged at an angle.

[0049] Based on the above embodiments of the present application, the arc extinguishing structure is arranged on both sides of the contact structure 3 to perform arc extinguishing treatment when the contact structure 3 is switched on and off. Specifically, by arranging two magnetic conduction plates 1 to form a magnetic blow arc extinguishing structure and two gas generating sheets 2 to form a gas blow arc extinguishing structure, in use, the magnetic blow arc extinguishing structure and the gas blow arc extinguishing structure can be selectively arranged or arranged simultaneously.

[0050] By arranging the two magnetic conduction plates 1 at an angle, compared with the way of arranging the two magnetic conduction plates 1 in parallel, when the two magnetic conduction plates 1 are arranged at an angle, they gradually approach each other. And since the magnetic induction lines have the property of shortening the length with force, when the magnetic induction lines pass through the magnetic conduction structure, the magnetic induction lines become shorter. Therefore, by arranging the two magnetic conduction plates 1 to gradually approach each other, the magnetic induction lines can be guided to form at the end where the two magnetic conduction plates 1 approach each other, thereby pulling the arc towards the end where the two magnetic conduction plates 1 approach each other, thus enhancing the pulling ability for the arc.

[0051] In addition, by arranging the two gas generating sheets 2 at an angle, the two gas generating sheets 2 form a structure similar to a funnel shape, which can play a role in collecting and guiding the flow direction of the gas, thereby enhancing the gas blow arc extinguishing effect.

[0052] Specifically, since the magnetic blow arc extinguishing structure formed by the two magnetic conduction plates 1 and the gas blow arc extinguishing structure formed by the two gas generating sheets 2 can be independent of each other, when arranging, the magnetic blow arc extinguishing structure and the gas blow arc extinguishing structure can be selected to be arranged simultaneously.

[0053] Furthermore, referring to Figure 6 and Figure 7 As shown, in some embodiments of the present application, when the arc extinguishing structure simultaneously includes two magnetic conduction plates 1 and two gas generating sheets 2, that is, when the magnetic blow arc extinguishing structure and the gas blow arc extinguishing structure are arranged simultaneously, at this time, the two magnetic conduction plates 1 form a first funnel structure 11, and the two gas generating sheets 2 form a second funnel structure 21, and the opening directions of the first funnel structure 11 and the second funnel structure 21 are opposite.

[0054] Based on the above-mentioned embodiments of the present application, when the magnetic conductive plate 1 and the gas generating plate 2 are provided at the same time, the magnetic blow-out arc extinguishing structure formed by the two magnetic conductive plates 1 can pull the electric arc in the direction in which the two magnetic conductive plates 1 are close to each other, that is, the side opposite to the opening direction of the first funnel structure 11. The gas blow-out arc extinguishing structure formed by the two gas generating plates 2 can blow the electric arc in the direction in which the two gas generating plates 2 are away from each other, that is, the opening direction of the second funnel structure 21. Therefore, by setting the opening directions of the first funnel structure 11 and the second funnel structure 21 in opposite directions, the magnetic blow-out arc extinguishing structure and the gas blow-out arc extinguishing structure can push the electric arc in the same direction, thereby improving the arc extinguishing effect.

[0055] refer to Figure 5 As shown in , in some embodiments of the present application, the arc extinguishing structure may further include an arc extinguishing chamber 4 .

[0056] Based on the above-mentioned embodiments of the present application, through the setting of the arc extinguishing chamber 4, the magnetic blowing arc extinguishing structure composed of two magnetic conductive plates 1 and the gas blowing arc extinguishing structure composed of two gas producing plates 2 can push the arc toward the direction close to the arc extinguishing chamber 4, thereby completing the arc extinguishing in the arc extinguishing chamber 4.

[0057] Furthermore, in the present application, the arc extinguishing chamber 4 can be specifically configured as any suitable structure. For example, the arc extinguishing chamber 4 can be configured as a glass vacuum arc extinguishing chamber or a ceramic vacuum arc extinguishing chamber, etc., which can be configured specifically according to the structural requirements of the switch, and the present application does not impose any specific restrictions on this.

[0058] In some embodiments of the present application, the opening direction of the first funnel structure 11 may be away from the arc extinguishing chamber 4 .

[0059] Based on the above-mentioned embodiments of the present application, the magnetic blowing arc extinguishing structure composed of two magnetic conductive plates 1 pulls the arc toward the side away from the opening direction of the first funnel structure 11 when pulling the arc. By setting the opening direction of the first funnel structure 11 away from the arc extinguishing chamber 4, the arc can be pulled toward the arc extinguishing chamber 4, and the arc completes the extinguishing process in the arc extinguishing chamber 4, thereby improving the arc extinguishing effect.

[0060] Similarly, in some embodiments of the present application, the opening direction of the second funnel structure 21 may be toward the arc extinguishing chamber 4 .

[0061] Based on the above-mentioned embodiments of the present application, the gas-blowing arc extinguishing structure composed of two gas-producing sheets 2 blows the arc toward one side of the opening direction of the second funnel structure 21 when blowing the arc. By setting the opening direction of the second funnel structure 21 toward the arc extinguishing chamber 4, the arc can be blown toward the arc extinguishing chamber 4, and the arc completes the extinguishing process in the arc extinguishing chamber 4, thereby improving the arc extinguishing effect.

[0062] In summary, in the present application, the magnetic conductive plates 1 and the gas generating sheets 2 are both arranged from the contact structure 3 to the arc extinguishing chamber 4. During the specific production and processing, they can be arranged according to the relative positions of the contact structure 3 and the arc extinguishing chamber 4, and the present application does not make specific limitations on this.

[0063] In addition, it should also be noted that in the present application, the magnetic conductive plates 1 and the gas generating sheets 2 can be made of any suitable materials. For example, the magnetic conductive plates 1 can be made of copper plates, and at the same time, the gas generating sheets 2 can be made of polyamide (PA) material. The polyamide material has the advantages of large gas generation amount, high breakdown voltage, less residual carbon, high mechanical properties, and excellent temperature resistance. When in use, it can not only generate a large amount of gas under arc erosion, but also the generated gas has good thermal conductivity, which is convenient for quickly cooling the arc.

[0064] In some other embodiments of the present application, the magnetic conductive plates 1 and the gas generating sheets 2 can also be made of other suitable materials, and the present application does not make specific limitations on this.

[0065] Reference Figure 6 and Figure 7 As shown in

[0066] Based on the above embodiments of the present application, by arranging the two gas generating sheets 2 between the magnetic conductive plates 1, since the magnetic conductive plates 1 rely on the formed magnetic field to pull the arc, arranging the gas generating sheets 2 between the two magnetic conductive plates 1 will not affect the pulling effect of the magnetic blow arc extinguishing structure on the arc. At the same time, arranging the two gas generating sheets 2 between the two magnetic conductive plates 1 can make full use of the space inside the switch, improve the space utilization rate, thereby reducing the volume of the switch and lowering the cost.

[0067] Specifically, when arranging, the magnetic conductive plates 1 are arranged on the inner wall of the housing 7 of the switch, and then the two gas generating sheets 2 are arranged between the two magnetic conductive plates 1 and are directly or indirectly connected to the magnetic conductive plates 1 to complete the fixation.

[0068] In addition, in order to reduce the space occupied by the magnetic conductive plates 1 and the gas generating sheets 2 inside the switch, in some embodiments of the present application, the magnetic conductive plates 1 and the gas generating sheets 2 can also be partially staggered, so as to reduce the overall space occupied by the magnetic conductive plates 1 and the gas generating sheets 2 in the width direction of the switch, thereby reducing the volume of the switch.

[0069] Furthermore, in the present application, when the two magnetic conductive plates 1 form the first funnel structure 11, the included angle formed by the two magnetic conductive plates 1 is α1, where α1 ≤ 90°.

[0070] Based on the above embodiments of the present application, by restricting the angles of the two magnetic conduction plates 1, when the dimension in the length direction of the magnetic conduction plate 1 is fixed, the larger the included angle between the two magnetic conduction plates 1, the wider the overall width of the first funnel structure 11 formed by the two magnetic conduction plates 1, which in turn affects the overall width of the switch, resulting in an increase in the volume of the switch and an increase in cost.

[0071] Specifically, the two magnetic conduction plates 1 are symmetrically arranged, and the included angle between the two magnetic conduction plates 1 can be specifically set to specific angles such as 10°, 20°, 30°, and 60°. The present application does not make specific restrictions on this.

[0072] Meanwhile, in the present application, when the two gas generating sheets 2 form the second funnel structure 21, the included angle formed by the two gas generating sheets 2 is α2, and α2 ≤ 90°.

[0073] Based on the above embodiments of the present application, when the included angle between the two gas generating sheets 2 is too large, it will not only affect the width of the second funnel structure 21 and thus the overall volume of the switch structure, but also, when the included angle between the two gas generating sheets 2 is too large, it will cause the current collecting effect of the second funnel structure 21 formed by the two gas generating sheets 2 to deteriorate, thereby reducing the blowing effect on the arc and affecting the overall arc extinguishing effect of the arc extinguishing structure.

[0074] Specifically, when the two gas generating sheets 2 are arranged in parallel, the gas generated by the gas generating sheets 2 under arc erosion moves in a direction away from the gas generating sheets 2, which in turn causes the gas between the two gas generating sheets 2 to collide, affecting the arc blowing effect. When the two gas generating sheets 2 are arranged at an angle, for example, the included angle between the two gas generating sheets 2 is 10°, on the one hand, the two gas generating sheets 2 form a funnel-shaped structure, causing the generated gas to flow towards the open end of the funnel-shaped structure, and on the other hand, it can also reduce the possibility of the gas generated by the two gas generating sheets 2 colliding. As the included angle formed by the two gas generating sheets 2 further increases, the possibility of the two gas generating sheets 2 colliding further decreases, but at this time, the open end of the second funnel structure 21 gradually increases, so the current collecting effect of the second funnel structure 21 on the air flow decreases, and thus the flow rate of the air flow will decrease, resulting in a decrease in the blowing effect of the air flow on the arc. Therefore, the angle between the gas generating sheets 2 needs to be controlled within a certain range.

[0075] Specifically, during actual production and assembly, the two gas generating sheets 2 are symmetrically arranged, and the included angle between the two gas generating sheets 2 can be specifically set to specific angles such as 10°, 20°, 30°, and 60°. The present application does not make specific restrictions on this.

[0076] In addition, it should be noted that the thicknesses of the magnetic conductive plate 1 and the gas generating sheet 2 are not limited in this application. In actual use, any appropriate setting can be made according to the space inside the switch under the condition of meeting the requirements of magnetic field strength and gas generation. This application does not make specific restrictions on this.

[0077] In summary, referring to Figures 5 to 7 as shown, based on the above settings of this application, the specific arc extinguishing process of the arc extinguishing structure of the switch in this application is as follows: First, the contact structure 3 is in the closing position, that is, Figure 5 the C area in, which also corresponds to the A area in the prior art. An arc will be generated in the C area during the opening and closing processes. At this time, the open end of the first funnel structure 11 formed by the two magnetic conductive plates 1 is close to the C area, and the magnetic field formed between the two magnetic conductive plates 1 pulls the arc, and uses the characteristic that the magnetic induction line tries to shorten its own length to pull the arc to the middle position of the magnetic conductive plate 1, that is, to Figure 5 the position of the D area in, while Figure 5 the D area in corresponds to the B area in the prior art. After the arc reaches the D area, the arc is further pulled towards the contraction end of the first funnel structure 11 by the characteristics of the magnetic field itself, and finally the arc is pulled into the arc extinguishing chamber 4 located at the contraction end of the first funnel structure 11 to complete arc extinguishing.

[0078] Similarly, the contraction end of the second funnel structure 21 formed by the two gas generating sheets 2 is close to the C area, and the two gas generating sheets 2 generate gas under the erosion of the arc to blow the arc. At this time, the second funnel structure 21 guides the air flow, so as to guide the air flow towards the direction close to the open end of the second funnel structure 21, so as to vertically direct the arc to the D area, and then further blow the arc into the arc extinguishing chamber 4 located at the open end of the second funnel structure 21 to complete arc extinguishing.

[0079] According to the second aspect of this application, a switch is provided. The switch includes a housing 7, a contact structure 3, and the above-mentioned arc extinguishing structure. The contact structure 3 is arranged in the housing 7, the arc extinguishing structure is arranged in the housing 7, and the arc extinguishing structure is located on both sides of the contact structure 3.

[0080] Based on the above embodiments of this application, the switch provided by this application includes the arc extinguishing structure of the above-mentioned switch, and the arc extinguishing effect of the arc generated at the opening and closing positions of the contact structure 3 in the switch is improved through the setting of the above arc extinguishing structure.

[0081] In some embodiments, the contact structure 3 includes a moving contact 31 and a static contact 32. The open end of the first funnel structure 11 is located on both sides of the closing position of the moving contact 31 and the static contact 32, and the contraction end of the second funnel structure 21 is located on both sides of the closing position of the moving contact 31 and the static contact 32.

[0082] Based on the above embodiments of the present application, the magnetic blowout arc extinguishing structure formed by the magnetic conduction plate 1 and the gas blowout arc extinguishing structure formed by the gas generating sheet 2 cooperate with each other to improve the arc extinguishing effect.

[0083] Specifically, an arc is generated when the moving contact 31 and the static contact 32 are in the opening and closing positions. The arc is pushed into the arc extinguishing chamber 4 for arc extinguishing through the magnetic blowout arc extinguishing formed by two magnetic conduction plates 1 and the gas blowout arc extinguishing structure formed by two gas generating sheets 2.

[0084] The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0085] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present application will not separately describe various possible combination methods.

[0086] Furthermore, any combination can be made between various different embodiments of the present application as long as it does not violate the idea of the present application, and it should also be regarded as the content disclosed by the present application.

Claims

1. An arc extinguishing structure of a switch, which is arranged on the side of the contact structure, and is characterized in that, The arc extinguishing structure includes: Two magnetic conductive plates, which are arranged oppositely, and the contact structure is located between the two magnetic conductive plates; and / or, Two gas generating sheets, which are arranged oppositely, and the contact structure is located between the two gas generating sheets; Wherein, the two magnetic conductive plates are arranged at an angle, and the two gas generating sheets are arranged at an angle.

2. The arc extinguishing structure of the switch according to claim 1, characterized in that, The arc extinguishing structure includes two magnetic conductive plates and two gas generating sheets. The two magnetic conductive plates form a first funnel structure, and the two gas generating sheets form a second funnel structure. The opening directions of the first funnel structure and the second funnel structure are opposite.

3. The arc extinguishing structure of the switch according to claim 2, characterized in that, The arc extinguishing structure further includes an arc extinguishing chamber.

4. The arc extinguishing structure of the switch according to claim 3, characterized in that, The opening direction of the first funnel structure faces away from the arc extinguishing chamber.

5. The arc extinguishing structure of the switch according to claim 3, characterized in that, The opening direction of the second funnel structure faces towards the arc extinguishing chamber.

6. The arc extinguishing structure of the switch according to claim 1, characterized in that, The arc extinguishing structure includes two magnetic conductive plates and two gas generating sheets, and the two gas generating sheets are arranged between the two magnetic conductive plates.

7. The arc extinguishing structure of the switch according to any one of claims 1-6, characterized in that, The included angle formed by the two magnetic conductive plates is α1, and α1 ≤ 90°.

8. The arc extinguishing structure of the switch according to any one of claims 1-6, characterized in that, The included angle formed by the two gas generating sheets is α2, and α2 ≤ 90°.

9. A switch, characterized in that, The switch includes: A housing; A contact structure, which is arranged in the housing; and, The arc extinguishing structure of the switch according to any one of claims 1-8, the arc extinguishing structure is arranged in the housing, and the arc extinguishing structure is located on both sides of the contact structure.

10. The switch according to claim 9, characterized in that, The contact structure includes a moving contact and a static contact. The open end of the first funnel structure is located on both sides of the closing position of the moving contact and the static contact, and the contracting end of the second funnel structure is located on both sides of the closing position of the moving contact and the static contact.

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