Non-polarity magnetic blowing device of switch electric appliance

Abstract

The utility model discloses a kind of non-polarity magnetic blowing devices of switch device, including isolating switch shell, isolating switch shell is equipped with movable static contact assembly, arc-extinguishing chamber one, arc-extinguishing chamber two, permanent magnet one and permanent magnet two, arc-extinguishing chamber one and arc-extinguishing chamber two are respectively distributed in the outside of two places symmetric arc position generated by movable static contact assembly, permanent magnet one is located in the outside of arc-extinguishing chamber one, permanent magnet two is located in the outside of arc-extinguishing chamber two.The utility model is designed by permanent magnet and arc-extinguishing chamber, not only can realize the longitudinal or transverse quick insertion assembly of permanent magnet, and permanent magnet shape is not limited by arc-extinguishing chamber internal structure;A variety of arc-extinguishing chamber grid shapes are designed, effectively improve arc-extinguishing chamber heat capacity while further reduce arc-extinguishing chamber volume;Permanent magnet generates magnetic field, when arc is generated between movable static contact, the ampere force formed by cutting magnetic induction line will arc be pulled to movable contact left side or right side arc-extinguishing chamber grid piece, to reach the purpose of quick extinguishing arc.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary disconnector arc extinguishing systems, and in particular to a non-polar magnetic blowout device for switching electrical appliances. Background Technology

[0002] Installing permanent magnets in rotary disconnect switches is beneficial for quickly extinguishing electric arcs. However, the current permanent magnet installation structure in rotary disconnect switches is unreasonable: 1. The permanent magnet and the arc-extinguishing chamber are usually designed as a single unit, meaning the permanent magnet is typically installed within the arc-extinguishing chamber component and housed together with it within the disconnect switch casing; 2. The shape of the permanent magnet is limited by the internal volume and shape of the arc-extinguishing chamber, making it impossible to maximize the utilization of the Ampere force generated by the magnetic field on the arc; 3. The arc-extinguishing grids of the disconnect switch are typically thin sheet structures, offering limited cooling effect on the arc. Utility Model Content

[0003] The purpose of this invention is to solve the technical problems existing in the background art. To this end, a non-polar magnetic blow-out device for switching electrical appliances is provided.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A non-polar magnetic blowout device for a switching electrical appliance includes a disconnecting switch housing. The disconnecting switch housing is equipped with a moving and stationary contact assembly, an arc-extinguishing chamber one, an arc-extinguishing chamber two, a permanent magnet one, and a permanent magnet two. The arc-extinguishing chamber one and the arc-extinguishing chamber two are respectively distributed on the outside of the two symmetrical arc positions generated by the moving and stationary contact assembly. The permanent magnet one is located on the outside of the arc-extinguishing chamber one, and the permanent magnet two is located on the outside of the arc-extinguishing chamber two.

[0006] The following is a further defined technical solution of this utility model: the first arc-extinguishing chamber and the second arc-extinguishing chamber are symmetrically arranged with respect to the axis of rotation of the moving contact in the moving and stationary contact assembly, and the first permanent magnet and the second permanent magnet are symmetrically arranged with respect to the axis of rotation of the moving contact in the moving and stationary contact assembly.

[0007] The following is a further defined technical solution of this utility model: the line connecting the positions of the first arc-extinguishing chamber and the second arc-extinguishing chamber coincides with the line connecting the positions of the first permanent magnet and the second permanent magnet.

[0008] The following is a further defined technical solution of this utility model: the disconnector housing is provided with a permanent magnet first mounting groove and a permanent magnet second mounting groove in the longitudinal direction, wherein the longitudinal direction of the disconnector housing is the thickness direction of the disconnector housing, the permanent magnet first is inserted into the permanent magnet first mounting groove in the longitudinal direction, and the permanent magnet second is inserted into the permanent magnet second mounting groove in the longitudinal direction.

[0009] The following is a further defined technical solution of this utility model: the arc-extinguishing chamber one and the arc-extinguishing chamber two have the same structure. The arc-extinguishing chamber one includes an arc-extinguishing chamber grid plate. The arc-extinguishing chamber grid plate is configured as a C-shaped metal plate with a hollow center. The thickness of one end of the C-shaped metal plate is less than the thickness of the other end.

[0010] The following is a further defined technical solution of this utility model: the middle hollow of the arc-extinguishing chamber grid plate faces the arc position.

[0011] The following is a further defined technical solution of this utility model: the arc-extinguishing chamber one and the arc-extinguishing chamber two have the same structure. The arc-extinguishing chamber one includes an arc-extinguishing chamber grid plate, which is configured as a metal column.

[0012] The following is a further defined technical solution of this utility model: the arc-extinguishing chamber further includes an arc-extinguishing chamber shell, the arc-extinguishing chamber shell includes an upper plate, a lower plate and a support column, the support column is located between the upper plate and the lower plate, the arc-extinguishing chamber grids are laid at intervals on the upper plate and the lower plate, and the axis of the arc-extinguishing chamber grids points to the position of the electric arc.

[0013] The following is a further defined technical solution of this utility model: a baffle plate is provided on the side of the arc-extinguishing chamber shell away from the arc position, so that the arc-extinguishing chamber shell forms a C-shaped semi-enclosed structure.

[0014] The following is a further defined technical solution of this utility model: the disconnector housing is provided with a permanent magnet first mounting groove and a permanent magnet second mounting groove in the horizontal direction, wherein the horizontal direction of the disconnector housing is the length direction or the width direction of the disconnector housing, the permanent magnet first is inserted into the permanent magnet first mounting groove in the horizontal direction, and the permanent magnet second is inserted into the permanent magnet second mounting groove in the horizontal direction.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] This invention, through a separate design of the permanent magnet and the arc-extinguishing chamber, not only enables rapid longitudinal or transverse insertion and assembly of the permanent magnet, but also ensures that the shape of the permanent magnet is not limited by the internal structure of the arc-extinguishing chamber. It also designs various arc-extinguishing chamber grid shapes, effectively increasing the heat capacity of the arc-extinguishing chamber while further reducing its volume. The permanent magnet generates a magnetic field, and when an electric arc is generated between the moving and stationary contacts, the Ampere force formed by cutting the magnetic field lines pulls the arc towards the left or right side of the moving contact's arc-extinguishing chamber grid, thereby achieving the purpose of rapidly extinguishing the arc.

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the magnetic blowout arc extinguishing principle;

[0020] Figure 2 This is a schematic diagram illustrating the principle of an electric arc cutting magnetic field lines under a rightward Ampere force.

[0021] Figure 3 This is a schematic diagram illustrating the principle of an electric arc cutting magnetic field lines under a leftward Ampere force.

[0022] Figure 4 This is a schematic diagram of the structure of the present invention, which includes a first mounting slot for permanent magnets and a second mounting slot for permanent magnets.

[0023] Figure 5 This is a front view schematic diagram of the structure of the present invention with permanent magnet one and permanent magnet two installed;

[0024] Figure 6 This is a schematic diagram of the structure of the present invention, showing the longitudinally mounted permanent magnet one and permanent magnet two;

[0025] Figure 7 This is a structural schematic diagram of Example 1;

[0026] Figure 8 This is a front view structural diagram of Embodiment 1.

[0027] Figure 9 This is a structural schematic diagram of Example 2;

[0028] Figure 10 This is a schematic diagram of the arc-extinguishing grid in Example 2;

[0029] Figure 11 This is a schematic diagram of the structure of the arc-extinguishing grid plate and the moving contact in Embodiment 2;

[0030] Figure 12 yes Figure 11 A front view structural diagram;

[0031] Figure 13 This is a schematic diagram of the structure of Example 3;

[0032] Figure 14 This is a diagram illustrating the assembly process of the arc-extinguishing chamber in Example 3;

[0033] Figure 15 This is a structural schematic diagram of Example 4.

[0034] Reference numerals in the attached drawings: 1. Mounting slot for permanent magnet one; 2. Mounting slot for permanent magnet two; 3. Mounting slot for moving contact shaft; 4. Permanent magnet one; 5. Permanent magnet two; 6. Moving contact shaft; 7. Disconnecting switch housing; 8. Arc-extinguishing chamber one; 9. Arc-extinguishing chamber two; 10. Moving contact; 11. Stationary contact; 12. Arc-extinguishing chamber grid. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, it should be understood that the terms "a" and "b" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "a" or "b" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0039] like Figure 1As shown, the principle of magnetic blowout arc extinguishing is as follows: The magnetic field generated by a permanent magnet within the switching cavity attracts the electric arc into the arc-extinguishing chamber through the Ampere force generated by cutting magnetic field lines, accelerating arc extinguishing. When the arc passes through the magnetic field, it cuts magnetic field lines, generating an Ampere force. Influenced by this force, the arc moves downwards according to the left-hand rule. Placing arc-extinguishing grids below the arc accelerates its extinguishing. Figure 1 The blue arrows in the image indicate the changing trend of the Ampere force on the electric arc. Figure 1 The overlapping squares in the middle represent arc-extinguishing grids.

[0040] Note: Left-hand rule: Extend your left hand so that your thumb and four fingers are perpendicular and in the same plane. Let the magnetic field lines pass perpendicularly through your palm, with your palm facing the N pole of the magnetic field and your four fingers pointing in the direction of the current. The direction your thumb points is the direction of the force on the current-carrying conductor in the magnetic field.

[0041] like Figure 2 and 3 As shown, the non-polar magnetic blowout effect is achieved by placing a permanent magnet above the arc-extinguishing chamber. During the switch-off process, the generated arc is perpendicular to the magnetic field lines. The arc cuts the magnetic field lines and is subjected to an Ampere force to the left or right. The arc will inevitably deflect to one side of the arc-extinguishing grid, accelerating the extinguishing of the arc, thus achieving the non-polar magnetic blowout effect. Figure 2 and Figure 3 In the diagram, the red arrow indicates the direction of the Ampere force; the blue arrow indicates the direction of the current.

[0042] like Figure 4 , 5 As shown in Figure 6, a non-polar magnetic blowout device for a switching device is provided, including a disconnecting switch housing 7. The disconnecting switch housing 7 is equipped with a moving and stationary contact assembly, an arc-extinguishing chamber 8, an arc-extinguishing chamber 9, a permanent magnet 4, and a permanent magnet 5. Arc-extinguishing chambers 8 and 9 are respectively distributed outside the two symmetrical arc-generating positions of the moving and stationary contact assembly. Permanent magnet 4 is located outside arc-extinguishing chamber 8, and permanent magnet 5 is located outside arc-extinguishing chamber 9. Arc-extinguishing chambers 8 and 9 are symmetrically arranged with respect to the axis of the moving contact shaft 6 in the moving and stationary contact assembly, and permanent magnets 4 and 5 are also symmetrically arranged with respect to the axis of the moving contact shaft 6 in the moving and stationary contact assembly. The line connecting the positions of arc-extinguishing chambers 8 and 9 coincides with the line connecting the positions of permanent magnets 4 and 5. Figure 4-6 As shown, the disconnector housing 7 has a longitudinally formed permanent magnet mounting groove 1 and a permanent magnet mounting groove 2, wherein the longitudinal direction of the disconnector housing 7 is the thickness direction of the disconnector housing 7. Permanent magnet 4 is inserted longitudinally into permanent magnet mounting groove 1, and permanent magnet 5 is inserted longitudinally into permanent magnet mounting groove 2. The disconnector housing 7 also has a moving contact shaft mounting groove 3, and the moving contact shaft 6 is mounted in the moving contact shaft mounting groove 3.

[0043] Example 1

[0044] like Figure 7 As shown, permanent magnet 4 and permanent magnet 5 are assembled longitudinally by inserting them into the pre-reserved mounting slot on the outside of the disconnector switch housing 7. This generates a magnetic field within the cavity of the disconnector switch housing 7. When an arc is generated between the moving and stationary contacts 11, the Ampere force generated by cutting the magnetic field lines pulls the arc towards the arc-extinguishing chamber grid 12 on one side of the moving contact 10. During the switch opening and closing process, the specific direction of the arc depends on the relationship between the actual magnetic pole direction and the current direction. However, under the action of the Ampere force, the arc will inevitably enter one of the arc-extinguishing chambers to achieve the purpose of quickly extinguishing the arc. Figure 7 In the diagram, the red dashed arrow at point A indicates the tendency of the electric arc to move under the influence of the Ampere force.

[0045] like Figure 8 As shown, the arc-extinguishing chamber grid 12 is configured through the shell features. Through the action of Ampere force, the arc is pulled to the left or right side of the shell of the moving contact 10. The arc moves along the shell features on both sides, which effectively increases the arc movement path and increases the arc voltage, so as to extinguish the arc.

[0046] Example 2

[0047] like Figure 9 As shown, permanent magnet 4 and permanent magnet 5 are assembled longitudinally by inserting them into the pre-reserved mounting slot on the outside of the disconnector housing 7. This generates a magnetic field within the cavity of the disconnector housing 7. When an arc is generated between the moving and stationary contacts 11, the Ampere force formed by cutting the magnetic field lines pulls the arc towards the left or right side of the arc-extinguishing chamber grid 12 of the moving contact 10, thereby achieving the purpose of quickly extinguishing the arc. Figure 9 In the image, the red dashed arrow at point B indicates the tendency of the electric arc to move under the influence of the Ampere force.

[0048] like Figure 10 As shown, the arc-extinguishing chamber grid plate 12 is a C-shaped metal sheet with a hollow center. The thickness of one end of the C-shaped metal sheet is less than the thickness of the other end. The hollow center of the arc-extinguishing chamber grid plate 12 faces the arc position. Through the action of Ampere force, the arc is pulled to the left or right side of the grid plate to achieve the purpose of cutting the arc, increasing the arc voltage, and accelerating the extinction of the arc.

[0049] like Figure 11 and 12 As shown, when the switch is closed or opened, during the movement of the moving contact 10, the trajectory of the moving contact 10 head is located between the legs of the arc-extinguishing chamber grid plate 12 (i.e., the two ends of the C-shaped metal plate). When an electric arc is generated between the moving and stationary contacts 11, the electric arc can quickly move to the left or right side of the arc-extinguishing chamber grid plate 12 under the action of Ampere force.

[0050] Example 3

[0051] like Figure 13As shown, permanent magnet 4 and permanent magnet 5 are assembled longitudinally by inserting them into the pre-reserved mounting slot on the outside of the disconnector housing 7. This generates a magnetic field within the cavity of the disconnector housing 7. When an arc is generated between the moving and stationary contacts 11, the Ampere force formed by cutting the magnetic field lines pulls the arc towards the left or right side of the arc-extinguishing chamber grid 12 of the moving contact 10, thereby achieving the purpose of quickly extinguishing the arc. Figure 13 In the diagram, the red dashed arrow at point C indicates the tendency of the electric arc to move under the influence of the Ampere force.

[0052] like Figure 14 As shown, the arc-extinguishing chamber grid 12 is configured as a metal column. The arc-extinguishing chamber shell includes an upper plate, a lower plate, and a support column. The support column is located between the upper and lower plates. The arc-extinguishing chamber grid 12 is laid at intervals on the upper and lower plates, and the axis of the arc-extinguishing chamber grid 12 points towards the arc position. During the assembly of the arc-extinguishing chamber, ① represents the arc-extinguishing chamber grid 12; ② represents the arc-extinguishing chamber shell; ③ represents inserting the arc-extinguishing chamber grid 12 into the arc-extinguishing chamber shell; ④ represents securing the assembled arc-extinguishing chamber shell to the shell using the interference fit feature on the wall of the isolating switch shell 7; ⑤ represents the support columns of the arc-extinguishing chamber cooperating to form the arc-extinguishing chamber cavity when the switch is closed; ⑥ represents the arc-extinguishing chamber shell can also be designed as a C-shaped semi-enclosed structure to increase air blocking; ⑦ represents the C-shaped semi-enclosed structure of the arc-extinguishing chamber cooperating to form the arc-extinguishing chamber cavity when the switch is closed. The specific structural settings of ⑥ and ⑦ are as follows: an air blocking plate is provided on the side of the arc-extinguishing chamber shell away from the arc position, so that the arc-extinguishing chamber shell forms a C-shaped semi-enclosed structure.

[0053] Therefore, through the action of Ampere force, the electric arc is pulled to the left or right columnar grid plate to achieve the purpose of cutting the electric arc, increasing the arc voltage, and accelerating the extinction of the arc. The columnar grid plate can be designed with volume according to actual needs to increase heat capacity. At the same time, the columnar grid plate is not limited to being designed as a cylinder, elliptical cylinder, cuboid, etc.

[0054] Example 4

[0055] like Figure 15 As shown, the disconnector housing 7 has a permanent magnet first mounting slot 1 and a permanent magnet second mounting slot 2 horizontally. The horizontal direction of the disconnector housing 7 is the length or width direction of the disconnector housing 7. The permanent magnet first 4 is horizontally inserted into the permanent magnet first mounting slot 1, and the permanent magnet second 5 is horizontally inserted into the permanent magnet second mounting slot 2.

[0056] Therefore, permanent magnet 4 and permanent magnet 5 are assembled by being horizontally inserted into the pre-reserved mounting slots on the outside of the disconnector housing 7. This generates a magnetic field within the cavity of the disconnector housing 7. When an electric arc is generated between the moving and stationary contacts 11, the Ampere force generated by cutting the magnetic field lines pulls the arc towards the left or right side of the arc-extinguishing chamber grid 12 of the moving contact 10, thereby achieving the purpose of quickly extinguishing the arc. The permanent magnets 4 and 5 can be inserted from either side in the direction of the black arrow or the white arrow.

[0057] The arc-extinguishing chamber grid 12 is provided in the form of, but is not limited to, metal sheets or metal columns.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. A non-polar magnetic blow-out device for a switching electrical appliance, characterized in that, The device includes a disconnector housing, which is equipped with a moving and stationary contact assembly, an arc-extinguishing chamber I, an arc-extinguishing chamber II, a permanent magnet I, and a permanent magnet II. The arc-extinguishing chamber I and the arc-extinguishing chamber II are respectively distributed on the outside of the two symmetrical arc positions generated by the moving and stationary contact assembly. The permanent magnet I is located on the outside of the arc-extinguishing chamber I, and the permanent magnet II is located on the outside of the arc-extinguishing chamber II.

2. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 1, characterized in that, The first and second arc-extinguishing chambers are symmetrically arranged with respect to the axis of rotation of the moving contact in the moving and stationary contact assembly, and the first and second permanent magnets are symmetrically arranged with respect to the axis of rotation of the moving contact in the moving and stationary contact assembly.

3. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 2, characterized in that, The line connecting the positions of arc-extinguishing chamber one and arc-extinguishing chamber two coincides with the line connecting the positions of permanent magnet one and permanent magnet two.

4. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 1, characterized in that, The disconnector switch housing has a longitudinally formed permanent magnet first mounting slot and a permanent magnet second mounting slot, wherein the longitudinal direction of the disconnector switch housing is the thickness direction of the disconnector switch housing, the permanent magnet first is inserted longitudinally into the permanent magnet first mounting slot, and the permanent magnet second is inserted longitudinally into the permanent magnet second mounting slot.

5. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 4, characterized in that, The arc-extinguishing chamber one and arc-extinguishing chamber two have the same structure. The arc-extinguishing chamber one includes an arc-extinguishing chamber grid plate, which is set as a C-shaped metal plate with a hollow center, wherein the thickness of one end of the C-shaped metal plate is less than the thickness of the other end.

6. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 5, characterized in that, The central cutout of the arc-extinguishing chamber grid faces the arc position.

7. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 4, characterized in that, The arc-extinguishing chamber one and arc-extinguishing chamber two have the same structure. Arc-extinguishing chamber one includes an arc-extinguishing chamber grid plate, which is configured as a metal column.

8. The non-polar magnetic blow-out device for a switching electrical appliance as described in claim 7, characterized in that, The arc-extinguishing chamber also includes an arc-extinguishing chamber shell, which includes an upper plate, a lower plate, and a support column. The support column is located between the upper plate and the lower plate. The arc-extinguishing chamber grids are laid at intervals on the upper plate and the lower plate, and the axis of the arc-extinguishing chamber grids points to the position of the electric arc.

9. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 8, characterized in that, A baffle plate is provided on the side of the arc-extinguishing chamber shell away from the electric arc position, so that the arc-extinguishing chamber shell forms a C-shaped semi-enclosed structure.

10. The non-polar magnetic blowout device for a switching electrical appliance as described in claim 1, characterized in that, The disconnector switch housing has a horizontally opened permanent magnet first mounting slot and a permanent magnet second mounting slot, wherein the horizontal direction of the disconnector switch housing is the length direction or the width direction of the disconnector switch housing, the permanent magnet first is horizontally inserted into the permanent magnet first mounting slot, and the permanent magnet second is horizontally inserted into the permanent magnet second mounting slot.

Images