Shell of circuit breaker and direct current circuit breaker
By designing the first arc plate and the second arc plate of the circuit breaker case directly to the arc extinguishing component, the problem of the DC circuit breaker shell is damaged in the arc extinguishing channel, and the larger arc extinguishing channel is achieved. And higher product safety.
Patent Information
- Application Number
- CN202420849433.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The housing of the DC circuit breaker is prone to burning in the arc extinguishing channel, resulting in limited creepage distance, which may lead to arcing or burning of the product.
The shell of the circuit breaker is designed, and the relative interval settings of the first arc board and the second arc plate are set to form the bottom and top wall of the arc extinguishing channel. To avoid the ablation of the shell structure in the arc extinguishing channel.
Effectively avoid the ablation of the shell structure in the arc extinguishing channel, increase the size of the arc extinguishing channel, reduce the probability of being obscured by the shell, and improve the safety and reliability of the product.
Smart Images
Figure CN222421816U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a housing of a circuit breaker and a DC circuit breaker. Background Art
[0002] There is a critical disconnect current or small current in the DC power system. Since DC does not have the characteristic of zero current like AC, the arc is not easy to extinguish.
[0003] An arc extinguishing channel is usually provided in the shell of a DC circuit breaker. One end of the arc extinguishing channel is arranged in the contact area of the contact and the other end is adjacent to the arc extinguishing component. Since the arc is not easy to extinguish in the DC power system, it is easy to cause the shell to burn. In some cases, if the creepage distance is not enough, it may even cause the product to arc or burn directly.
[0004] like Figure 8 and Fig. 9 As shown, the shell is composed of a base and a cover body, the arc extinguishing channel is usually composed of arc isolation plates forming the top wall and the bottom wall, and the side walls are usually composed of convex ribs on the base and the cover body, and at the position where the arc extinguishing channel is adjacent to the arc extinguishing component installation area, the base and the cover body are respectively provided with arc isolation plate limiting ribs 211 for limiting the arc isolation plate, however, the arc isolation plate limiting rib 211 is located in the arc striking channel and adjacent to the arc extinguishing component, and therefore, the arc isolation plate limiting rib 211 is easily severely burned.
[0005] In addition, since the arc isolation plate needs to be positioned, in order to adapt to the positioning structure, the size of the arc isolation plate is subject to design restrictions, resulting in the creepage distance of the arc extinguishing channel being relatively limited. Utility Model Content
[0006] The utility model aims to overcome the defects of the prior art and provide a circuit breaker housing and a DC circuit breaker.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] A housing of a circuit breaker comprises: a base, a cover, a first arc isolation plate and a second arc isolation plate, the base and the cover are buckled relative to each other to form a circuit breaker cavity, the first arc isolation plate and the second arc isolation plate are arranged relatively and spaced apart between the base and the cover, and the base, the first arc isolation plate, the second arc isolation plate and the cover are arranged in sequence in the thickness direction of the circuit breaker;
[0009] The housing is provided with an arc extinguishing component installation position and an arc extinguishing channel, and the arc extinguishing channel is arranged adjacent to the arc extinguishing component installation position;
[0010] The first arc isolation plate and the second arc isolation plate are arranged relatively and spaced apart to form the bottom wall and the top wall of the arc extinguishing channel respectively;
[0011] A first convex edge extending toward the base in the thickness direction is provided at a position where the first arc isolation plate abuts against the arc extinguishing assembly installation position, and after the arc extinguishing assembly is installed at the arc extinguishing assembly installation position, the first convex edge abuts against the arc extinguishing assembly;
[0012] A second convex edge extending toward the cover body in the thickness direction is provided at the position where the second arc isolation plate abuts against the arc extinguishing assembly installation position. After the arc extinguishing assembly is installed at the arc extinguishing assembly installation position, the second convex edge abuts against the arc extinguishing assembly.
[0013] Preferably, the base and / or the cover body are provided with convex ribs to form a lower side wall of the arc extinguishing channel, and the lower side wall is provided with a notch leading to the outside of the shell.
[0014] Preferably, the lower side wall includes a first convex rib provided on the base and a second convex rib provided on the cover body, and the notch includes a first notch provided on the first convex rib and a second notch provided on the second convex rib.
[0015] Preferably, convex ribs are provided on the base and the cover to form an upper side wall of the arc extinguishing channel, and the upper side wall includes a third convex rib on the base and a fourth convex rib on the cover.
[0016] Preferably, a fifth convex edge extending toward the base in the thickness direction is provided at the position where the first arc isolation plate abuts the first convex rib; a sixth convex edge extending toward the cover in the thickness direction is provided at the position where the second arc isolation plate abuts the second convex rib.
[0017] Preferably, a seventh convex edge extending toward the base in the thickness direction is provided at the position where the first arc isolation plate abuts the third convex rib; an eighth convex edge extending toward the cover body in the thickness direction is provided at the position where the second arc isolation plate abuts the fourth convex rib.
[0018] Preferably, the first arc isolation plate comprises a first bottom plate, the side edge of the first bottom plate extending toward the base in the thickness direction is sequentially provided with the first convex edge, the first connecting convex edge, the fifth convex edge, the second connecting convex edge, the third connecting convex edge and the seventh convex edge, the fifth convex edge is arranged obliquely relative to the first convex edge, the seventh convex edge is L-shaped and cooperates with the third convex rib, the third connecting convex edge is in an arc shape, the first convex edge, the first connecting convex edge, the fifth convex edge, the second connecting convex edge, the third connecting convex edge and the seventh convex edge are sequentially connected and surround the side edge of the first bottom plate to form a first spacing groove between the first bottom plate and the base;
[0019] The second arc isolation plate includes a second base plate, and the side of the second base plate extends toward the cover body in the thickness direction and is sequentially provided with the second flange, the eighth flange, the fourth flange, the third flange, the sixth flange and the fourth connecting flange, the eighth flange is L-shaped and cooperates with the fourth flange, the fourth flange and the third flange are L-shaped and correspond to the opening end of the arc extinguishing channel with the arc-shaped third connecting flange, the second flange, the eighth flange, the fourth flange, the third flange, the sixth flange and the fourth connecting flange are sequentially connected and surround the side of the second base plate to form a second spacing groove between the second base plate and the cover body.
[0020] Preferably, a first limiting step is provided at a position corresponding to the first flange within the arc extinguishing assembly installation position of the base for abutting the first flange, and the height of the first limiting step is smaller than the height of the first flange; a second limiting step is provided at a position corresponding to the second flange within the arc extinguishing assembly installation position of the cover body for abutting the second flange, and the height of the second limiting step is smaller than the height of the second flange.
[0021] Preferably, a plurality of first limiting convex ribs are arranged in parallel and relatively perpendicular to the first convex edge on the first limiting step, and ends of the plurality of first limiting convex ribs are flush with the limiting surface of the first limiting step and abut against the first convex edge, and the sum of the heights of the first limiting step and the first limiting convex ribs is less than the height of the first convex edge;
[0022] A plurality of second limiting ribs are arranged in parallel and relatively perpendicular to the second convex edge on the second limiting step, and the ends of the plurality of second limiting ribs are flush with the limiting surface of the second limiting step and abut against the second convex edge. The sum of the heights of the second limiting step and the second limiting ribs is less than the height of the second convex edge.
[0023] Preferably, a fifth limiting rib is provided in the area of the base corresponding to the arc extinguishing channel for positioning the first convex edge and the fifth convex edge from the inner side, and the fifth limiting rib is located in the first spacing groove to position the first convex edge and the fifth convex edge;
[0024] The cover body is provided with a sixth limiting rib in the area corresponding to the arc extinguishing channel for positioning the second convex edge and the sixth convex edge from the inner side, and the sixth limiting rib is located in the second spacing groove for positioning the second convex edge and the sixth convex edge.
[0025] Preferably, a first positioning hole is provided in the middle area of the first arc isolation plate, and a first positioning column for inserting into the first positioning hole is provided at a corresponding position of the base;
[0026] A second positioning hole is disposed in the middle area of the second arc isolation plate, and a second positioning column for inserting into the second positioning hole is disposed at a corresponding position of the cover body.
[0027] Preferably, the second arc isolation plate is provided with a third convex edge and a fourth convex edge on one side corresponding to the opening end of the arc extinguishing channel, and the cover body is provided with a third limiting convex rib and a fourth limiting convex rib for limiting the third convex edge and the fourth convex edge.
[0028] The utility model also provides a DC circuit breaker, comprising: a shell, a contact system arranged in the shell, and an arc extinguishing assembly arranged in the shell, wherein the shell is the shell of any of the above-mentioned DC circuit breakers.
[0029] The housing of the circuit breaker of the present invention is provided with a first convex edge at the position where the first arc isolation plate abuts against the arc extinguishing assembly installation position, and the second arc isolation plate abuts against the arc extinguishing assembly installation position. The first arc isolation plate and the second arc isolation plate can directly abut against the arc extinguishing assembly without the existence of a housing structure therebetween, thereby avoiding the problem of the housing structure being burned in the arc extinguishing channel and further protecting the safety of the housing.
[0030] Furthermore, a second limiting step is provided at a position of the arc extinguishing assembly installation position in the cover body corresponding to the second convex edge for abutting the second convex edge, and a first limiting step is provided at a position of the arc extinguishing assembly installation position in the base corresponding to the first convex edge for abutting the first convex edge, so as to limit the first convex edge and the second convex edge of the first arc isolation plate and the second arc isolation plate to stabilize the position of the first arc isolation plate and the second arc isolation plate to avoid shaking or excessive squeezing pressure on the arc extinguishing assembly.
[0031] Furthermore, the second arc-isolating plate is provided with a third convex edge and a fourth convex edge on one side corresponding to the opening end of the arc-extinguishing channel, and the cover body is provided with a third limiting convex rib and a fourth limiting convex rib for limiting the third convex edge and the fourth convex edge. In this way, it is not necessary to provide a limiting rib on the position of the cover body corresponding to the opening end of the arc-extinguishing channel to limit the edge of the second arc-isolating plate. The second arc-isolating plate can be limited by the third convex edge and the fourth convex edge and the characteristic ribs (i.e., the third limiting convex rib and the fourth limiting convex rib) that can be provided on the shell itself, thereby increasing the overall structure of the second arc-isolating plate and improving the coverage of the second arc-isolating plate, thereby further increasing the size of the arc-extinguishing channel and reducing the probability of the shell being burned.
[0032] Furthermore, a notch leading to the outside of the shell is provided below the contact mounting area on the lower side wall of the arc extinguishing channel, and the notch leads to the outside of the shell so that the arc can be led downward during the electrical life test to prevent the arc from stagnating between the moving and static contacts and causing serious burning of the moving and static contacts. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 It is a structural schematic diagram of a circuit breaker base according to an embodiment of the utility model;
[0034] Figure 2 This is a schematic diagram of the structure of the first arc isolation plate of the embodiment of the utility model;
[0035] Figure 3 This is a schematic diagram of the installation structure of the first arc isolation plate in the embodiment of the utility model;
[0036] Figure 4 This is a schematic diagram of the structure of the cover body of the utility model embodiment;
[0037] Figure 5 This is a schematic diagram of the structure of the second arc isolation plate of the embodiment of the utility model;
[0038] Figure 6 This is a schematic diagram of the structure of the second arc isolation plate of the utility model embodiment (from another perspective)
[0039] Figure 7 It is a schematic diagram of the installation structure of the second arc isolation plate in the embodiment of the utility model;
[0040] Figure 8 It is a structural schematic diagram of an existing cover body;
[0041] Fig. 9 It is a structural schematic diagram of an existing base.
[0042] In the figure:
[0043] Base 110, first limiting step 111, first convex rib 112, first limiting convex rib 113, fifth limiting convex rib 116, third convex rib 117, first notch 118, first positioning column 119;
[0044] Cover body 120, second limiting step 121, second convex rib 122, second limiting convex rib 123, third limiting convex rib 125, fourth limiting convex rib 124, sixth limiting convex rib 126, fourth convex rib 127, second notch 128, second positioning column 129;
[0045] The first arc isolation plate 130, the first bottom plate 1300, the first protrusion 131, the fifth protrusion 135, the seventh protrusion 137, the first positioning hole 139, the first connecting protrusion 1301, the second connecting protrusion 1302, and the third connecting protrusion 1303;
[0046] The second arc isolation plate 140, the second bottom plate 1400, the second protrusion 141, the third protrusion 143, the fourth protrusion 144, the sixth protrusion 146, the eighth protrusion 148, the second positioning hole 149, and the fourth connecting protrusion 1404;
[0047] Arc extinguishing assembly installation position 150;
[0048] Arc extinguishing channel 160;
[0049] Arc isolation plate limiting rib 211. DETAILED DESCRIPTION
[0050] The following is a further description of the specific implementation of the circuit breaker of the present utility model in conjunction with the embodiments given in the accompanying drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.
[0051] The specific implementation scheme of the utility model is further described below in conjunction with the accompanying drawings:
[0052] A DC circuit breaker generally includes a housing, a contact system, an arc extinguishing assembly, a release and an operating mechanism. The contact system is generally composed of a moving contact and a static contact. The contact and disengagement of the moving contact and the static contact are controlled by the operating mechanism. The release is used to drive the operating mechanism to trip in time when an abnormality occurs in the circuit system, thereby disconnecting the moving contact and the static contact. The arc extinguishing assembly is usually an arc extinguishing chamber, which is used to extinguish the arc generated when the moving contact and the static contact are disconnected.
[0053] like Figure 1 , 3 As shown in Figures 4 and 7, a housing of a circuit breaker of this embodiment is applied to the above-mentioned DC circuit breaker, and the housing includes: a base 110, a cover 120, a first arc isolation plate 130 and a second arc isolation plate 140. The base 110 and the cover 120 are relatively buckled to form a circuit breaker cavity. The first arc isolation plate 130 and the second arc isolation plate 140 are relatively spaced and located between the base 110 and the cover 120. The base 110, the first arc isolation plate 130, the second arc isolation plate 140 and the cover 120 are sequentially arranged in the thickness direction of the circuit breaker. The shell is provided with an arc extinguishing component installation position 150 and an arc extinguishing channel 160, and the arc extinguishing channel 160 is arranged adjacent to the arc extinguishing component installation position 150; the arc extinguishing component is installed in the arc extinguishing component installation position 150, and the first arc isolation plate 130 and the second arc isolation plate 140 are relatively spaced apart to respectively form the bottom wall and the top wall of the arc extinguishing channel 160; the base 110 and / or the cover body 120 are provided with convex ribs to form the side walls of the arc extinguishing channel 160, and of course, the convex ribs forming the side walls can also be formed by convex ribs on a single-sided base 110 or a single-sided cover body 120.
[0054] In this embodiment, combined with Figure 2 , 5As shown in , 6, the first arc isolation plate 130 is provided with a first convex edge 131 extending in the thickness direction at the position where it abuts against the arc extinguishing assembly installation position 150, and a first limiting step 111 is provided in the arc extinguishing assembly installation position 150 in the base 110 at a position corresponding to the first convex edge 131 for abutting against the first convex edge 131. After the arc extinguishing assembly is installed to the arc extinguishing assembly installation position 150, the first convex edge 131 abuts against the arc extinguishing assembly; the second arc isolation plate 140 is provided with a second convex edge 141 extending in the thickness direction at the position where it abuts against the arc extinguishing assembly installation position 150, and a second limiting step 121 is provided in the arc extinguishing assembly installation position 150 in the cover body 120 at a position corresponding to the second convex edge 141 for abutting against the second convex edge 141. After the arc extinguishing assembly is installed to the arc extinguishing assembly installation position 150, the second convex edge 141 abuts against the arc extinguishing assembly. In this way, the first arc isolation plate 130 and the second arc isolation plate 140 can be directly abutted against the arc extinguishing assembly by extending the structure at this position, and there is no shell structure between the two, thereby avoiding the problem of the shell structure being burned in the arc extinguishing channel and further protecting the safety of the shell.
[0055] In this embodiment, ribs are provided on the base 110 and / or the cover body 120 to form the upper side wall and the lower side wall of the arc extinguishing channel 160. In this embodiment, the upper side wall is respectively composed of a third rib 117 on the base 110 and a fourth rib 127 on the cover body 120, and a notch leading to the outside of the shell is provided below the contact installation area corresponding to the lower side wall. The notch leads to the outside of the shell, so that during the electrical life test, the arc is led downward to avoid the arc stagnation between the moving and static contacts, which may cause serious burning of the moving and static contacts.
[0056] Furthermore, the lower side wall includes a first convex rib 112 disposed on the base 110 and a second convex rib 122 disposed on the cover 120 , and the notch includes a first notch 118 disposed on the first convex rib 112 and a second notch 128 disposed on the second convex rib 122 .
[0057] In this embodiment, convex ribs are provided on the base 110 and the cover 120 to form an upper side wall of the arc extinguishing channel 160 , and the upper side wall includes a third convex rib 117 on the base 110 and a fourth convex rib 127 on the cover 120 .
[0058] Furthermore, a first limiting step 111 is provided at a position corresponding to the first flange 131 at an edge within the arc extinguishing assembly installation position 150 of the base 110 for abutting the first flange 131, and a height of the first limiting step 111 is smaller than a height of the first flange 131; a second limiting step 121 is provided at a position corresponding to the second flange 141 at an edge within the arc extinguishing assembly installation position 150 of the cover body 120 for abutting the second flange 141, and a height of the second limiting step 121 is smaller than a height of the second flange 141. The first limiting step 111 and the second limiting step 121 are located in the arc extinguishing assembly installation position 150. After the arc extinguishing assembly is installed in the arc extinguishing assembly installation position 150, the first limiting step 111, the arc extinguishing assembly, and the second limiting step 121 are stacked in the thickness direction of the circuit breaker, that is, the arc extinguishing assembly is provided to shield the first limiting step 111 and the second limiting step 121, and there is no shell structure between the arc extinguishing assembly and the first convex edge 131 and the second convex edge 141. The arc enters the arc extinguishing chamber of the arc extinguishing assembly from the first arc isolation plate 130 and the second arc isolation plate 140, and will not burn the first limiting step 111 and the second limiting step 121, further protecting the safety of the shell; the first limiting step 111 and the second limiting step 121 play a role in positioning the arc extinguishing assembly before safety. Obviously, the first limiting step 111 and the second limiting step 121 may not be provided as needed.
[0059] In this embodiment, a plurality of first limiting ribs 113 arranged in parallel and relatively perpendicular to the first convex edge 131 are further arranged on the first limiting step 111. The ends of the plurality of first limiting ribs 113 are flush with the limiting surface of the first limiting step 111 and abut against the first convex edge 131. The sum of the heights of the first limiting step 111 and the first limiting ribs 113 is less than the height of the first convex edge 131. The plurality of first limiting ribs 113 arranged in parallel can further improve the positioning effect of the first arc isolation plate 130. The height of the first limiting step 111 is relatively low, and the first arc isolation plate 130 is easy to slide out during assembly, so as to prevent the first arc isolation plate 130 from directly squeezing the arc extinguishing assembly. At the same time, the plurality of first limiting ribs 113 arranged in parallel can disperse the stress in the area of the arc extinguishing assembly installation position 150, so as to strengthen the structural strength of the area.
[0060] Similarly, for the same reason, a plurality of second limiting ribs 123 are arranged in parallel and relatively perpendicular to the second flange 141 on the second limiting step 121, and the ends of the plurality of second limiting ribs 123 are flush with the limiting surface of the second limiting step 121 and abut against the second flange 141, and the sum of the heights of the second limiting step 121 and the second limiting ribs 123 is less than the height of the second flange 141.
[0061] In this embodiment, Figure 5 As shown, the second arc isolation plate 140 is provided with a third convex edge 143 and a fourth convex edge 144 at one side corresponding to the opening end of the arc extinguishing channel 160. Figure 4 As shown, the cover body 120 is provided with a third limiting rib 125 and a fourth limiting rib 124 for limiting the third convex edge 143 and the fourth convex edge 144. Figure 6 As shown, and with Figure 8 In comparison, there is no need to set a limiting rib on the side of the cover body corresponding to the opening end of the arc extinguishing channel to limit the edge of the second arc isolation plate 140. The second arc isolation plate 140 can be limited by the third ridge 143 and the fourth ridge 144 as well as the characteristic ribs (i.e., the third limiting rib 123 and the fourth limiting rib 124) that can be set on the shell itself, thereby increasing the overall structure of the second arc isolation plate 140 and improving the coverage of the second arc isolation plate 140, thereby further increasing the size of the arc extinguishing channel and reducing the chance of the shell being burned.
[0062] In this example, the first arc isolation plate 130 includes a first bottom plate 1300, and the side of the first bottom plate extends toward the base 110 in the thickness direction and is sequentially provided with the first flange 131, the first connecting flange 1301, the fifth flange 135, the second connecting flange 1302, the third connecting flange 1303 and the seventh flange 137, the fifth flange 135 is inclined relative to the first flange 131, the seventh flange 137 is L-shaped and cooperates with the third rib 117, the third connecting flange 1303 is in an arc shape, the first flange 131, the first connecting flange 1301, the fifth flange 135, the second connecting flange 1302, the third connecting flange 1303 and the seventh flange 137 are sequentially connected and surround the side of the first bottom plate 1300 to form a first spacing groove between the first bottom plate 1300 and the base 110. Each convex edge not only positions the first arc isolation plate 130 , but also strengthens the structure of the first arc isolation plate 130 . At the same time, a first spacing groove is formed between the first bottom plate 1300 and the base 110 , further protecting the base.
[0063] Similarly, the second arc isolation plate 140 includes a second base plate 1400, and the side of the second base plate 1400 extends toward the cover body 120 in the thickness direction and is sequentially provided with the second flange 141, the eighth flange 148, the fourth flange 144, the third flange 143, the sixth flange 146 and the fourth connecting flange 1404, the eighth flange 148 is L-shaped and cooperates with the fourth rib 127, the fourth flange 144 and the third flange 143 are L-shaped and correspond to the opening end of the arc extinguishing channel 160 with the arc-shaped third connecting flange 1303, the second flange 141, the eighth flange 148, the fourth flange 144, the third flange 143, the sixth flange 146 and the fourth connecting flange 1404 are sequentially connected and surround the side of the second base plate 1400 to form a second spacing groove between the second base plate 1400 and the cover body 120.
[0064] In this embodiment, the third limiting ribs 123 are arranged in parallel in a plurality, and the fourth limiting ribs 124 are arranged in parallel in a plurality. The method of arranging in parallel in a plurality of ribs can reduce the local stress concentration of the housing and realize the combined effect of positioning and structural reinforcement.
[0065] In this embodiment, a fifth convex edge 135 is further provided at the edge of the first arc isolation plate 130 corresponding to the side wall, and a fifth limiting rib 116 for positioning the first convex edge 131 and the fifth convex edge 135 from the inside is provided at the area of the base 110 corresponding to the arc extinguishing channel 160, and the fifth limiting rib 116 is located in the first spacing groove to position the first convex edge 131 and the fifth convex edge 135; in this way, multi-directional positioning of the first arc isolation plate 130 can be achieved, ensuring the installation accuracy and reliability of the first arc isolation plate 130, thereby effectively ensuring the safety of the shell.
[0066] Furthermore, the second arc isolation plate 140 is also provided with a sixth convex edge 146 at the edge corresponding to the side wall, and the cover body 120 is provided with a sixth limiting rib 126 in the area corresponding to the arc extinguishing channel 160 for positioning the second convex edge 141 and the sixth convex edge 146 from the inside, and the sixth limiting rib 126 is located in the second spacing groove for positioning the second convex edge 141 and the sixth convex edge 146.
[0067] In this embodiment, a first positioning hole 139 is provided in the middle area of the first arc isolation plate 130, and a first positioning column 119 for inserting into the first positioning hole 139 is provided at a corresponding position of the base 110; a second positioning hole 149 is provided in the middle area of the second arc isolation plate 140, and a second positioning column 129 for inserting into the second positioning hole 149 is provided at a corresponding position of the cover body 120. The first positioning column 119 and the first positioning hole 139, and the second positioning column 129 and the second positioning hole 149 can be fastened and assembled by interference fit.
[0068] The utility model also provides a DC circuit breaker, comprising: a shell, a contact system arranged in the shell, and an arc extinguishing assembly arranged in the shell, wherein the shell is the shell of any of the above-mentioned DC circuit breakers.
[0069] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.
[0070] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A housing of a circuit breaker, comprising: A base (110), a cover (120), a first arc-isolating plate (130) and a second arc-isolating plate (140); the base (110) and the cover (120) are relatively buckled to form a circuit breaker cavity; the first arc-isolating plate (130) and the second arc-isolating plate (140) are relatively spaced and arranged between the base (110) and the cover (120); the base (110), the first arc-isolating plate (130), the second arc-isolating plate (140) and the cover (120) are arranged in sequence in the thickness direction of the circuit breaker; the shell is provided with an arc-extinguishing component installation position (150) and an arc-extinguishing channel (160); the arc-extinguishing channel (160) is arranged adjacent to the arc-extinguishing component installation position (150); the first arc-isolating plate (130) and the second arc-isolating plate (140) are relatively spaced and arranged to respectively form the bottom wall and the top wall of the arc-extinguishing channel (160); the characteristics are: A first convex edge (131) extending toward the base (110) in the thickness direction is provided at a position where the first arc isolation plate (130) abuts against the arc extinguishing assembly installation position (150); after the arc extinguishing assembly is installed at the arc extinguishing assembly installation position (150), the first convex edge (131) abuts against the arc extinguishing assembly; A second convex edge (141) extending toward the cover body (120) in the thickness direction is provided at the position where the second arc isolation plate (140) abuts against the arc extinguishing assembly installation position (150); after the arc extinguishing assembly is installed at the arc extinguishing assembly installation position (150), the second convex edge (141) abuts against the arc extinguishing assembly.
2. The housing of the circuit breaker according to claim 1, characterized in that: The base (110) and / or the cover (120) are provided with convex ribs for forming the lower side wall of the arc extinguishing channel (160), and the lower side wall is provided with a notch leading to the outside of the shell.
3. The housing of the circuit breaker according to claim 2, characterized in that: The lower side wall includes a first convex rib (112) arranged on the base (110) and a second convex rib (122) arranged on the cover body (120), and the notch includes a first notch (118) arranged on the first convex rib (112) and a second notch (128) arranged on the second convex rib (122).
4. The housing of the circuit breaker according to claim 3, characterized in that: The base (110) and the cover (120) are provided with convex ribs for forming an upper side wall of the arc extinguishing channel (160), and the upper side wall comprises a third convex rib (117) on the base (110) and a fourth convex rib (127) on the cover (120).
5. The housing of the circuit breaker according to claim 4, characterized in that: A fifth convex edge (135) extending toward the base (110) in the thickness direction is provided at a position where the first arc isolation plate (130) abuts against the first convex rib (112); and a sixth convex edge (146) extending toward the cover body (120) in the thickness direction is provided at a position where the second arc isolation plate (140) abuts against the second convex rib (122).
6. The housing of the circuit breaker according to claim 5, characterized in that: A seventh convex edge (137) extending toward the base (110) in the thickness direction is provided at a position where the first arc isolation plate (130) abuts against the third convex rib (117); and an eighth convex edge (148) extending toward the cover body (120) in the thickness direction is provided at a position where the second arc isolation plate (140) abuts against the fourth convex rib (127).
7. The housing of the circuit breaker according to claim 6, characterized in that: The first arc isolation plate (130) comprises a first bottom plate (1300), the side edge of the first bottom plate extending in the thickness direction toward the base (110) is provided with the first convex edge (131), the first connecting convex edge (1301), the fifth convex edge (135), the second connecting convex edge (1302), the third connecting convex edge (1303) and the seventh convex edge (137) in sequence, the fifth convex edge (135) is arranged obliquely with respect to the first convex edge (131), the seventh convex edge (137) is arranged ) is L-shaped and cooperates with the third rib (117); the third connecting ridge (1303) is in an arc shape; the first ridge (131), the first connecting ridge (1301), the fifth ridge (135), the second connecting ridge (1302), the third connecting ridge (1303) and the seventh ridge (137) are sequentially connected around the side of the first bottom plate (1300) to form a first spacing groove between the first bottom plate (1300) and the base (110); The second arc isolation plate (140) comprises a second bottom plate (1400), and the side edge of the second bottom plate (1400) extends toward the cover body (120) in the thickness direction and is provided with the second convex edge (141), the eighth convex edge (148), the fourth convex edge (144), the third convex edge (143), the sixth convex edge (146) and the fourth connecting convex edge (1404) in sequence, the eighth convex edge (148) is L-shaped and cooperates with the fourth convex rib (127), the fourth convex edge (144) is L-shaped and cooperates with the fourth convex rib (127), and the fourth convex edge (144) is L-shaped and cooperates with the fourth convex rib (127). The three convex edges (143) are arranged in an L shape and correspond to the opening end of the arc extinguishing channel (160) with the arc-shaped third connecting convex edge (1303); the second convex edge (141), the eighth convex edge (148), the fourth convex edge (144), the third convex edge (143), the sixth convex edge (146) and the fourth connecting convex edge (1404) are sequentially connected to surround the side of the second bottom plate (1400) to form a second spacing groove between the second bottom plate (1400) and the cover body (120).
8. The housing of the circuit breaker according to claim 7, characterized in that: A first limiting step (111) is provided at a position corresponding to the first convex edge (131) of the arc extinguishing assembly installation position (150) of the base (110) for abutting against the first convex edge (131), and the height of the first limiting step (111) is less than the height of the first convex edge (131); and a second limiting step (121) is provided at a position corresponding to the second convex edge (141) of the arc extinguishing assembly installation position (150) of the cover body (120) for abutting against the second convex edge (141), and the height of the second limiting step (121) is less than the height of the second convex edge (141).
9. The housing of the circuit breaker according to claim 8, characterized in that: A plurality of first limiting ribs (113) are arranged in parallel and relatively perpendicular to the first convex edge (131) on the first limiting step (111), the ends of the plurality of first limiting ribs (113) are flush with the limiting surface of the first limiting step (111) and abut against the first convex edge (131), and the sum of the heights of the first limiting step (111) and the first limiting ribs (113) is less than the height of the first convex edge (131); A plurality of second limiting ribs (123) are arranged in parallel and relatively perpendicular to the second convex edge (141) on the second limiting step (121); ends of the plurality of second limiting ribs (123) are flush with the limiting surface of the second limiting step (121) and abut against the second convex edge (141); and the sum of the heights of the second limiting step (121) and the second limiting ribs (123) is less than the height of the second convex edge (141).
10. The housing of the circuit breaker according to claim 7, characterized in that: A fifth limiting rib (116) for positioning the first convex edge (131) and the fifth convex edge (135) from the inside is provided in the area of the base (110) corresponding to the arc extinguishing channel (160); the fifth limiting rib (116) is located in the first spacing groove to position the first convex edge (131) and the fifth convex edge (135); A sixth limiting rib (126) for positioning the second convex edge (141) and the sixth convex edge (146) from the inside is provided in the area of the cover body (120) corresponding to the arc extinguishing channel (160); the sixth limiting rib (126) is located in the second spacing groove to position the second convex edge (141) and the sixth convex edge (146).
11. The housing of the circuit breaker according to claim 1, characterized in that: A first positioning hole (139) is provided in a middle area of the first arc isolation plate (130), and a first positioning column (119) for inserting into the first positioning hole (139) is provided at a corresponding position of the base (110); A second positioning hole (149) is provided in the middle area of the second arc isolation plate (140), and a second positioning column (129) for inserting into the second positioning hole (149) is provided at a corresponding position of the cover body (120).
12. The housing of the circuit breaker according to claim 1, characterized in that: The second arc isolation plate (140) is provided with a third convex edge (143) and a fourth convex edge (144) on one side of the opening end corresponding to the arc extinguishing channel (160), and the cover body (120) is provided with a third limiting convex rib (125) and a fourth limiting convex rib (124) for limiting the third convex edge (143) and the fourth convex edge (144).
13. A DC circuit breaker, comprising: A shell, a contact system arranged in the shell, and an arc extinguishing assembly arranged in the shell, characterized in that the shell is the shell of the circuit breaker according to any one of claims 1-12.