Arc isolating device
By designing an arc-separating device including arc-separating parts and energy storage parts, the problem of excessive arc residence time in electrical products is solved, the arc separation and arc extinguishing are achieved, and the reliability and life of the product are improved.
Patent Information
- Application Number
- CN202420913037.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-28
AI Technical Summary
When the static contacts and the moving contacts are separated, the arc stays for too long or too large and cannot be extinguished in time, resulting in the static contacts being easily burned.
An arc-insulation device is designed, including a moving contact, a static contact and an arc-insulation assembly. The arc-separating assembly consists of an even number of arc-separating parts and an energy storage part. The arc-separating parts are driven to move relative to each other. When the arc-separating parts abut each other, an arc-separating effect is formed to achieve arc-separating and arc-extinguishing.
Effectively prevent the arc from being in the arc-pulled state, avoiding the burning of dynamic and static contacts, achieving the effect of arc isolation and arc extinguishing, and improving the reliability and life of electrical products.
Smart Images
Figure CN222462662U_ABST
Abstract
Description
Technical Field
[0001] The utility model specifically relates to an arc isolation device. Background Art
[0002] Conventional electrical products, such as dual power conversion switches, isolating switches, knife switches, etc., have clamping grooves on the moving contact. The moving contact moves so that the clamping grooves match the corresponding static contacts, thereby achieving an electrical connection between the moving contact and the static contact. However, when the electrical product needs to be switched, the static contact and the moving contact are separated, which will generate an arc. The arc stays too long or is too large to be extinguished in time, causing the moving and static contacts to be easily burned. Utility Model Content
[0003] The main technical problem solved by the utility model is to provide an arc isolation device.
[0004] The technical solution adopted by the utility model to solve the technical problem is: an arc isolation device, which includes:
[0005] A moving contact, wherein the moving contact is provided with a contact portion, and the contact portion is provided with a clamping groove;
[0006] A stationary contact, which cooperates with the moving contact, and the number of the stationary contacts is at least two;
[0007] The arc isolation assembly is connected to the moving contact. The arc isolation assembly is provided with an arc isolation piece. The number of arc isolation pieces is an even number. Two arc isolation pieces form a group of arc isolation structures. The arc isolation structure is located on one side of the clamping groove. The two arc isolation pieces in the same group move relative to each other. The two arc isolation pieces are attached to form a contact area. The arc isolation assembly is also provided with an energy storage piece. The energy storage piece drives the arc isolation piece to move toward the corresponding arc isolation piece in the same group.
[0008] In the first state, the static contact abuts against the abutting area to drive the arc-isolating member to move in the opposite direction, and the static contact extends into the clamping groove and cooperates with the clamping groove;
[0009] In the second state, the stationary contact is separated from the clamping groove, the stationary contact has no force acting on the arc-isolating member, and the energy storage member drives the two arc-isolating members to move relative to each other.
[0010] With this structural setting, when the static contact and the moving contact are separated, the two arc-isolating parts move relative to each other. When the two arc-isolating parts abut against each other, an arc-isolating effect is formed to prevent the arc from being in an arc-pulling state, thereby achieving the effect of arc isolation and arc extinguishing. This structure is simple and practical. This structure can be applied to dual power conversion switches, isolating switches, knife switches, etc.
[0011] The arc isolation assembly includes an even number of arc isolation modules, each arc isolation module is independently arranged, and each arc isolation module includes an arc isolation component and an energy storage component.
[0012] By setting the arc isolation module, a modular installation is formed, which makes the arc isolation module easy to disassemble and replace, thereby improving the convenience of operation.
[0013] Among them, the arc isolation module also includes a fixing part, which is connected to the contact part, and the fixing part is provided with a fixed cavity. The arc isolation part is accommodated in the fixed cavity and slides relative to the fixed cavity. The energy storage part is accommodated in the fixed cavity, one end of the energy storage part is against the inner wall of the fixed cavity, and the other end of the energy storage part is against the arc isolation part.
[0014] The fixing part, arc-isolating part and energy storage part form an arc-isolating module, which can be assembled independently and then cooperate with the moving contact to form an assembly effect. Here, two arc-isolating modules cooperate, so that two arc-isolating parts cooperate to form a set of arc-isolating structures. The setting of the fixing cavity better realizes the fixation between the arc-isolating part and the energy storage part, and gives the arc-isolating part a certain driving force, thereby ensuring a better arc-isolating effect.
[0015] Wherein, one of the fixing piece and the contact part is provided with a fixing groove, and the other of the fixing piece and the contact part is provided with a fixing part matched with the fixing groove.
[0016] The cooperation between the fixing groove and the fixing portion forms a guiding and fixing effect, thereby better achieving a connection and fixing effect between the fixing piece and the contact portion.
[0017] The fixing groove is in a 7-shape, and the fixing portion is in a U-shape with a transverse opening.
[0018] This structural setting forms a limiting and fixing effect in both the Y-axis and Z-axis directions, so that the fixing member and the contact part are firmly fixed.
[0019] Among them, one of the fixing member and the arc-isolating member is provided with a guide groove, and the other of the fixing member and the arc-isolating member is provided with a guide portion matched with the guide groove.
[0020] The cooperation between the guide groove and the guide part forms a guiding sliding effect, so that the arc isolation piece can realize movement better. At the same time, the cooperation between the guide part and the guide groove also plays a role in connecting and fixing the fixing piece and the arc isolation piece, so that the fixing piece and the arc isolation piece can better form a module and will not fall off.
[0021] When two arc-isolating members of the same group abut against each other, a gap is provided between the guide portion and the inner wall of the guide groove.
[0022] This structural setting forms a certain margin control to ensure that the two arc-isolating parts in the same group are against each other. When the two arc-isolating parts are against each other, the sealing effect is good and the arc cannot pass through easily. Moreover, during the installation process, the arc-isolating parts and the energy storage parts are against each other to form the maximum stroke, thereby achieving the fixing effect. During the assembly process between the module and the moving contact, the two arc-isolating parts are against each other, which further improves the fixing strength of the arc-isolating parts and prevents the arc-isolating parts from falling off.
[0023] Among them, one of the fixing piece and the contact part is provided with a card slot, and the other of the fixing piece and the contact part is provided with a buckle matched with the card slot.
[0024] The combination of the slot and the buckle forms a locking effect in the X-axis direction, further improving the connection and fixation between the entire module and the moving contact. Moreover, the combination of the buckle and the slot allows for quick installation without tools.
[0025] The fixing piece is provided with a positioning protrusion, and the positioning protrusion is fitted with the contact part.
[0026] The setting of the positioning protrusion forms a limiting and fixing effect, thereby improving the convenience of installation.
[0027] The arc-isolating member is provided with an arc surface, and the arc surfaces of two arc-isolating members in the same group form a contact area.
[0028] The setting of the arc surface can better achieve the cooperation between the static contact and the arc isolation member, making the driving smoother. In addition, the arc isolation member can also be a triangular tip abutting against each other. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0030] Figure 2 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0031] Figure 3 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0032] Figure 4 yes Figure 3 Side view of
[0033] Figure 5 It is a structural schematic diagram of the arc isolation module in Embodiment 1 of the present utility model;
[0034] Figure 6 It is an exploded view of the arc isolation module in Embodiment 1 of the present utility model;
[0035] Figure 7 is a cross-sectional view of the arc isolation module in Example 1 of the utility model;
[0036] Figure 8 is a cross-sectional view of the arc isolation module in Example 1 of the utility model;
[0037] Fig. 9 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;
[0038] Fig.10 It is a structural schematic diagram of embodiment 1 of the utility model. DETAILED DESCRIPTION
[0039] Embodiment 1:
[0040] An arc isolation device, such as the attached Figure 1-10 As shown, including:
[0041] The moving contact 11, the number of the moving contacts 11 can be three, corresponding to three-phase electricity, and the number of the moving contacts 11 here can be adjusted according to actual needs. In this embodiment, only one moving contact 11 is described. The arc isolation device in this embodiment can be applied to dual power conversion switches, disconnectors, knife switches, etc. For example, when the arc isolation device is applied to the disconnector, the moving contact 11 is provided with two contact parts 111, and the number of the static contacts 12 is two. The moving contact 11 is driven to move by the operating mechanism to achieve electrical coordination between the two contact parts 111 and the corresponding static contacts 12. When the arc isolation device is applied to the dual power conversion switch, the moving contact 11 is provided with a contact part 111, and the number of the contact parts 111 can also be adjusted according to actual needs. For example, the contact part 111 can be one, and the other end of the moving contact 11 is connected to one of the static contacts 12 by a soft copper wire, and the other two static contacts 12 are located on the movement trajectory of the contact part 111. By rotating the moving contact 11, a switching effect between the common circuit and the standby circuit is formed. When the number of the contact parts 111 is two, the static contact 12 located in the middle of the three static contacts 12 is a common end, and the two contact parts 111 cooperate with one of the static contacts 12 and the common end to form a common circuit. By rotating the moving contact 11, the two contact parts 111 cooperate with the other static contact 12 and the common end to form a standby circuit. In this embodiment, two contact parts 111 are described as an example. The contact part 111 is provided with a clamping groove 1113, and the clamping groove 1113 is used to cooperate with the static contact 12 to achieve an electrical connection effect. The structures of the two contact parts 111 here are consistent. In this embodiment, the imaginary central axes of the two clamping grooves 1113 are vertically arranged, that is, one clamping groove 1113 extends horizontally to the right, and the other clamping groove 1113 extends vertically downward. The positions of the three static contacts 12 are: one of the static contacts 12 is located directly above the moving contact 11, one of the static contacts 12 is located on the horizontal right side of the moving contact 11, and the other static contact 12 is located directly below the moving contact 11. The three static contacts 12 are all located on the rotation track of the moving contact 11. Here, the moving contact 11 specifically cooperates with the operating mechanism inside the dual power conversion switch, and the rotation effect is achieved through the square shaft. In this embodiment, only the arc isolation device is described for use in the dual power conversion switch. Based on this embodiment, those skilled in the art should be able to think of how to use it on the isolating switch and the knife switch.
[0042] The static contact 12 cooperates with the moving contact 11, and there are three static contacts 12. For better description, in this embodiment, the static contact 12 located directly above the moving contact 11 is the first static contact 121, the static contact 12 located on the horizontal right side of the moving contact 11 is the second static contact 122, and the static contact 12 located directly below the moving contact 11 is the third static contact 123.
[0043] Arc-isolating assembly, the arc-isolating assembly is connected to the moving contact 11, and the connection here is specifically connected and fixed. The arc-isolating assembly is provided with an arc-isolating piece 13, and the number of arc-isolating pieces 13 is an even number. Two arc-isolating pieces 13 form a group of arc-isolating structures. The arc-isolating structure is located on one side of the clamping groove 1113. Specifically, when the static contact 12 moves relative to the moving contact 11, the static contact 12 pushes the arc-isolating structure to enter the clamping groove 1113, or the static contact 12 pushes the arc-isolating structure to separate from the contact part 111. The two arc-isolating pieces 13 in the same group move relative to each other, and the two arc-isolating pieces 13 are attached to form a friction area; the arc-isolating assembly is also provided with an energy storage piece 14, and the energy storage piece 14 drives the arc-isolating piece 13 to move toward the corresponding arc-isolating piece 13 in the same group. Under normal conditions, due to the action of the energy storage piece 14, the arc-isolating piece 13 moves toward another corresponding arc-isolating piece 13, so that the two are against each other, forming a friction area. In the first state, when the static contact 12 moves relative to the moving contact 11, the static contact 12 abuts against the abutting area, and the static contact 12 generates a force to push the arc-isolating member 13 to move in the opposite direction, so that the two arc-isolating members 13 are separated, and the static contact 12 passes through the two arc-isolating members 13 and enters the clamping groove 1113. Here, the static contact 12 is in a static state. In order to better describe and facilitate the understanding of those skilled in the art, it will be described as the process of the static contact 12 moving, which is specifically relative movement here. When the static contact 12 cooperates with the clamping groove 1113, the static contact 12 can pass over the arc-isolating member 13 as a whole. At this time, the arc-isolating member 13 is abutted against each other again under the action of the energy storage member 14. When the static contact 12 cooperates with the clamping groove 1113, the static contact 12 can partially cooperate with the clamping groove 1113, and the rest of the static contact 12 is located between the two arc-isolating members 13, forming a clamping and fixing effect. In the second state, when the moving contact 11 moves in the opposite direction, the static contact 12 also pushes the arc isolation piece 13 to move in the opposite direction. When the force applied by the static contact 12 on the arc isolation piece 13 disappears, the arc isolation piece 13 quickly resets, and the two arc isolation pieces 13 resist each other to form an isolation and closure effect. At this time, the arc generated by the static contact 12 and the contact part 111 will be cut off by the arc isolation piece 13, thereby achieving the effect of arc isolation and arc extinguishing.
[0044] When the number of the contact parts 111 is one, one set of arc isolation structures can achieve the effect of arc isolation and arc extinguishing. When the number of the contact parts 111 is one, one set of arc isolation structures can also be respectively provided on both sides of the clamping groove 1113, so as to improve the effect of arc isolation and arc extinguishing. When the number of the contact parts 111 is two, one contact part 111 is correspondingly provided with one set of arc isolation structures. When the number of the contact parts 111 is two, one contact part 111 is also correspondingly provided with two sets of arc isolation structures, and the two sets of arc isolation structures are respectively provided on both sides of the clamping groove 1113. In this embodiment, the two contact parts 111 are respectively the first contact part 1111 and the second contact part 1112, the first static contact 121 and the second static contact 122 are located on the movement trajectory of the first contact part 1111, and the second static contact 122 and the third static contact 123 are located on the movement trajectory of the second contact part 1112. One arc isolation structure is located on the side of the first contact part 1111 close to the first static contact 121, and the other arc isolation structure is located on the side of the second contact part 1112 close to the third static contact 123. It can also be considered that the two arc isolation structures are both located outside the two contact parts 111.
[0045] With this structural arrangement, when the static contact 12 is separated from the moving contact 11, the two arc-isolating members 13 move relative to each other. When the two arc-isolating members 13 abut against each other, an arc-isolating effect is formed to prevent the arc from being in an arc-pulling state, thereby achieving the arc-isolating and arc-extinguishing effects. This structure is simple and highly practical.
[0046] Specifically, as attached Figure 1-10 As shown, the angle formed by the first contact part 1111 and the second contact part 1112 can be an acute angle or an obtuse angle, which is specifically defined by the positional relationship between the first static contact 121, the second static contact 122, and the third static contact 123. For example, when the size of the second static contact 122 is large, it is sufficient to meet the electrical connection effect. At this time, the angle formed by the first contact part 1111 and the second contact part 1112 can be an obtuse angle; when the sizes of the three static contacts are small, resulting in a smaller creepage standard, the angle formed by the first contact part 1111 and the second contact part 1112 can be an acute angle. Those skilled in the art can adjust according to actual needs. In this embodiment, the angle formed by the first contact part 1111 and the second contact part 1112 specifically refers to the angle formed by the imaginary center line of the clamping groove of the first contact part 1111 and the imaginary center line of the clamping groove of the second contact part 1112.
[0047] Specifically, as attached Figure 9-10 As shown, the static contact 12 located directly above the moving contact 11 is a common end contact, specifically the second static contact 122, and the first static contact 121 and the third static contact 123 are respectively arranged on the horizontal left and right sides of the moving contact 11. In addition, those skilled in the art can also adjust the relationship between the three static contacts according to actual needs.
[0048] Specifically, as attached Figure 1-4 As shown, the arc isolation assembly includes an even number of arc isolation modules 15, each arc isolation module 15 is independently arranged, and each arc isolation module 15 includes an arc isolation component 13 and an energy storage component 14. The number of arc isolation modules 15 is adjusted according to actual needs. In this embodiment, four arc isolation modules 15 are described as an example, and the four arc isolation modules 15 are grouped in pairs to form two groups of arc isolation structures. Through the arrangement of the arc isolation modules 15, a modular installation is formed, so that the arc isolation modules 15 are easy to disassemble and replace, and the convenience of operation is improved. The entire contact module is assembled with the contact part 111, so as to achieve an overall assembly effect. In addition, the arc isolation module 15 can also include two arc isolation components 13 and an energy storage component 14. The only difference is that one arc isolation module 15 accommodates one arc isolation component 13 and one energy storage component 14, which is more convenient to process, simpler to install, and can also reduce production costs.
[0049] Specifically, as attached Figure 3-10 As shown, the arc-isolating module 15 also includes a fixing member 16, which is connected to the contact part 111. The fixing member 16 is provided with a fixing cavity 161. The arc-isolating member 13 is accommodated in the fixing cavity 161 and slides relative to the fixing cavity 161. The energy storage member 14 is accommodated in the fixing cavity 161, and one end of the energy storage member 14 abuts against the inner wall of the fixing cavity 161, and the other end of the energy storage member 14 abuts against the arc-isolating member 13. The fixing member 16, the arc-isolating member 13, and the energy storage member 14 cooperate to form an arc-isolating module 15. This arc-isolating module 15 can be assembled independently and connected and fixed to the contact part 111 by the fixing member 16 to form an assembly effect. Here, two arc-isolating modules 15 cooperate so that two arc-isolating members 13 cooperate to form a group of arc-isolating structures. In this embodiment, four arc-isolating modules 15 are grouped in pairs to form two groups of arc-isolating structures, forming a convenient and detachable structure. When the internal energy storage component 14 fails, it can be replaced by replacing the arc isolation module 15, thereby ensuring the normal use of the entire moving contact 11, without disassembling the entirety. The setting of the fixed cavity 161 better realizes the fixation between the arc isolation component 13 and the energy storage component 14, giving the arc isolation component 13 a certain driving force, thereby ensuring a better arc isolation effect. In this embodiment, the fixed cavity 161 has only one opening, and the arc isolation component 13 only extends from this opening to the interior of the fixed cavity 161.
[0050] Specifically, as attached Figure 3-10As shown, one of the fixing member 16 and the contact part 111 is provided with a fixing groove 17, and the other of the fixing member 16 and the contact part 111 is provided with a fixing part 18 that cooperates with the fixing groove 17. The cooperation between the fixing groove 17 and the fixing part 18 forms a guiding fixing effect, and better realizes the connection and fixing effect between the fixing member 16 and the contact part 111. In this embodiment, the fixing groove 17 is located on the fixing member 16, and the fixing part 18 is located on the outside of the contact part 111, forming a sleeve effect.
[0051] Specifically, as attached Figure 3-10 As shown, the fixing groove 17 is in a 7-shape, and the fixing portion 18 is in a U-shape with a transverse opening. This structural arrangement forms a limiting fixing effect in the Y-axis and Z-axis directions, so that the fixing member 16 and the contact portion 111 are firmly fixed. That is, during the installation process, the entire arc isolation module 15 slides along the X-axis direction, that is, along the outer wall of the contact portion 111, thereby achieving a matching effect between the fixing groove 17 and the fixing portion 18, thereby achieving locking in two directions.
[0052] Specifically, as attached Figure 3-10 As shown, one of the fixing member 16 and the contact part 111 is provided with a slot 19, and the other of the fixing member 16 and the contact part 111 is provided with a buckle 20 that cooperates with the slot 19. The cooperation between the slot 19 and the buckle 20 forms a locking effect in the X-axis direction, further improving the connection and fixation between the entire module and the moving contact 11. Moreover, by cooperating with the buckle 20 and the slot 19, quick installation can be achieved without tools. In this embodiment, the slot 19 is located on the outside of the contact part 111, and the buckle 20 is located on the fixing member 16, where the buckle 20 is specifically located in the extension direction of the X-axis of the fixing member 16. In addition, the fixing part 18 and the fixing slot 17 are interference fit, thereby achieving a connection and fixation effect. However, the disadvantage of this structure is that it is inconvenient to disassemble.
[0053] Specifically, as attached Figure 3-10 As shown, the fixing member 16 is provided with a positioning protrusion 162, and the positioning protrusion 162 is fitted with the contact part 111. The setting of the positioning protrusion 162 forms a limiting fixing effect, which improves the convenience of installation. Here, the positioning protrusion 162 is located above the fixing member 16, extends to the contact part 111, and fits with the top surface of the contact part 111 to form a positioning and fixing effect, thereby facilitating the matching of the fixing part 18 with the fixing groove 17, and finally, through the matching of the buckle 20 with the card groove 19, the connection and fixation between the entire arc isolation module 15 and the contact part 111 is realized. Furthermore, the number of the positioning protrusions 162 is two, and the two positioning protrusions 162 form a clamping and positioning effect.
[0054] In this embodiment, two arc-isolating modules 15 form a group. When the two arc-isolating modules 15 are installed, the arc-isolating members 13 will be pressed against each other due to the action of the energy storage member 14, that is, it can be understood that the arc-isolating members 13 reciprocate in the Y-axis direction. The two arc-isolating members 13 are pressed against each other, so that the arc-isolating members 13 are firmly fixed and not easy to fall off.
[0055] Specifically, as attached Figure 3-10 As shown, one of the fixing member 16 and the arc-isolating member 13 is provided with a guide groove 21, and the other of the fixing member 16 and the arc-isolating member 13 is provided with a guide portion 22 that cooperates with the guide groove 21. The cooperation between the guide groove 21 and the guide portion 22 forms a guiding sliding effect, so that the arc-isolating member 13 can better realize movement. At the same time, the cooperation between the guide portion 22 and the guide groove 21 also plays a role in the connection and fixation between the fixing member 16 and the arc-isolating member 13, so that the fixing member 16 and the arc-isolating member 13 can better form a module, and the two will not fall off. In this embodiment, the guide groove 21 is located on the fixing member 16. Specifically, the fixing member 16 is provided with a fixed support leg, which extends outward in the Y-axis direction, and the guide groove 21 is located on the fixed support leg. It should be noted here that the guide groove 21 is a long strip, and its short side surface is a limiting surface, that is, the guide portion 22 slides to the short side surface, that is, it cannot slide, and the guide portion 22 can only slide between the two short side surfaces. The guide portion 22 is located on the arc-isolating member 13. The energy storage component 14 is first installed in the fixed cavity 161, and then the arc isolation component 13 enters into the fixed cavity 161 through the opening part of the fixed cavity 161. At this time, the guide part 22 is also embedded in the guide groove 21. After the installation is completed, due to the action of the energy storage component 14, the arc isolation component 13 will move outward along the Y-axis direction. At this time, the guide part 22 is against the short side surface of the outer side of the guide groove 21 (the short side surface away from the fixed cavity 161), thereby achieving a fixing effect. At this time, the arc isolation component 13, the fixed component 16, and the energy storage component 14 are assembled to form an arc isolation module 15, which is not easy to fall off.
[0056] Specifically, as attached Figure 3-10 As shown, when two arc-isolating members 13 of the same group abut against each other, a gap is provided between the guide portion 22 and the inner wall of the guide groove 21. The gap here specifically refers to the distance between the guide portion 22 and the outer short side surface of the guide groove 21 (the short side surface away from the fixed cavity 161). This structural setting is adopted to form a certain margin control to ensure that the two arc-isolating members 13 of the same group abut against each other. When the two arc-isolating members 13 abut against each other, the sealing effect is good and the arc cannot pass through easily. Moreover, during the installation process, the arc-isolating member 13 abuts against the energy storage member 14 to form the maximum stroke, thereby achieving a fixing effect. During the assembly process between the module and the moving contact 11, the two arc-isolating members 13 abut against each other, thereby further improving the fixing strength of the arc-isolating member 13 and preventing the arc-isolating member 13 from falling off.
[0057] Specifically, the number of the energy storage component 14 may be one or more. In this embodiment, the number of the energy storage component 14 is one, and the energy storage component 14 is a spring.
[0058] Specifically, as attached Figure 3-10 As shown, in order to better position and fix the energy storage member 14, a first protrusion 1611 is provided in the fixing cavity 161, and a second protrusion 131 is provided in the arc-isolating member 13. One end of the energy storage member 14 is sleeved on the first protrusion 1611 and abuts against the inner wall of the fixing cavity 161, and the other end of the energy storage member 14 is sleeved on the second protrusion 131 and abuts against one side of the arc-isolating member 13. This structural arrangement makes it easier to install the energy storage member 14.
[0059] Specifically, as attached Figure 3-10 As shown, the arc-isolating member 13 is provided with an arc surface 132, and the arc surfaces 132 of the same group of two arc-isolating members 13 form a contact area. The setting of the arc surface 132 can better achieve the cooperation between the static contact 12 and the arc-isolating member 13, making the drive smoother. In addition, the arc-isolating member 13 can also be a triangular tip that abuts against each other. The difference is that the gap where the arc surface 132 fits is smaller, which can better achieve arc-isolating sealing. In this embodiment, the arc surfaces 132 of the two arc-isolating members 13 are symmetrically arranged, and the matching connection between the two is located on the same horizontal plane as the imaginary center line of the clamping groove 1113.
[0060] Specifically, the arc-isolating member 13 may be made of an insulating material or an insulating gas-generating material. When the electric arc contacts the arc-isolating member 13 , arc-extinguishing gas is generated, thereby further enhancing the arc-extinguishing effect.
Claims
1. An arc isolation device, characterized in that: include: A moving contact, wherein the moving contact is provided with a contact portion, and the contact portion is provided with a clamping groove; A stationary contact, which cooperates with the moving contact, and the number of the stationary contacts is at least two; The arc isolation assembly is connected to the moving contact. The arc isolation assembly is provided with an arc isolation piece. The number of arc isolation pieces is an even number. Two arc isolation pieces form a group of arc isolation structures. The arc isolation structure is located on one side of the clamping groove. The two arc isolation pieces in the same group move relative to each other. The two arc isolation pieces are attached to form a contact area. The arc isolation assembly is also provided with an energy storage piece. The energy storage piece drives the arc isolation piece to move toward the corresponding arc isolation piece in the same group. In the first state, the static contact abuts against the abutting area to drive the arc-isolating member to move in the opposite direction, and the static contact extends into the clamping groove and cooperates with the clamping groove; In the second state, the stationary contact is separated from the clamping groove, the stationary contact has no force acting on the arc-isolating member, and the energy storage member drives the two arc-isolating members to move relative to each other.
2. An arc isolation device according to claim 1, characterized in that: The arc isolation assembly comprises an even number of arc isolation modules, each arc isolation module is independently arranged, and each arc isolation module comprises an arc isolation part and an energy storage part.
3. An arc isolation device according to claim 2, characterized in that: The arc isolation module also includes a fixing part, which is connected to the contact part. The fixing part is provided with a fixed cavity. The arc isolation part is accommodated in the fixed cavity and slides relative to the fixed cavity. The energy storage part is accommodated in the fixed cavity. One end of the energy storage part is against the inner wall of the fixed cavity, and the other end of the energy storage part is against the arc isolation part.
4. An arc isolation device as claimed in claim 3, characterized in that: One of the fixing piece and the contact part is provided with a fixing groove, and the other of the fixing piece and the contact part is provided with a fixing part matched with the fixing groove.
5. An arc isolation device as claimed in claim 4, characterized in that: The fixing groove is in a 7-shape, and the fixing portion is in a U-shape with a transverse opening.
6. An arc isolation device as claimed in claim 3, characterized in that: One of the fixing piece and the arc-isolating piece is provided with a guide groove, and the other of the fixing piece and the arc-isolating piece is provided with a guide portion matched with the guide groove.
7. An arc isolation device according to claim 6, characterized in that: When two arc-isolating members of the same group abut against each other, a gap is provided between the guide portion and the inner wall of the guide groove.
8. An arc isolation device as claimed in claim 3, characterized in that: One of the fixing piece and the contact part is provided with a card slot, and the other of the fixing piece and the contact part is provided with a buckle matched with the card slot.
9. An arc isolation device as claimed in claim 3, characterized in that: The fixing piece is provided with a positioning protrusion, and the positioning protrusion is fitted with the contact part.
10. An arc isolation device according to claim 1, characterized in that: The arc-isolating member is provided with an arc surface, and the arc surfaces of two arc-isolating members in the same group form a contact area.