Base of low-voltage circuit breaker

Abstract

The utility model relates to a base of a low-voltage circuit breaker. The base comprises a first substrate and a second substrate, the first substrate and the second substrate can be in butt joint with each other to form a base, and groove bodies are formed in the butt joint faces respectively to form a cavity in a butt joint mode. The bases can be in butt joint with each other to form a base set. Compared with the prior art, on the premise that the positions of a driving mechanism and a contact system of the circuit breaker are not changed, the connection strength is increased, the insulativity between the two substrates is made up through the structural improvement of the attaching connection surfaces, the connection structure and the like on the substrates, and the strength and the operation reliability of the circuit breaker are enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to a base of a low-voltage circuit breaker. Background Art

[0002] Low-voltage frame circuit breakers are large-capacity low-voltage electrical equipment, mainly used in industrial power systems to ensure the normal connection and disconnection of circuits and automatically disconnect the circuits under abnormal circuit conditions (such as overload and short circuit).

[0003] During the opening and closing process of the circuit breaker, arcs and heat are generated in the contact cavity, and the release of energy will cause damage to the circuit breaker. In the existing frame circuit breakers, there is no arc isolation structure between the base plates, nor a relatively reliable connection structure. The release of energy causes the arc to escape and cause phase-to-phase short circuit, affecting the operating life of the circuit breaker and further damaging the load. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a base of a low-voltage circuit breaker to improve the connection reliability of the base structure.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A base of a low-voltage circuit breaker includes a first base plate and a second base plate;

[0007] The first base plate and the second base plate can be butt-jointed with each other to form a base, and groove bodies are respectively opened on the butting surfaces to form a cavity by butting; the bases can be butt-jointed with each other to form a base group;

[0008] A stepped groove is provided at the inner edge of the groove opening of the first base plate, and a rib is correspondingly provided at the inner edge of the groove opening of the second base plate. When the base plates are butted, the rib is embedded in the stepped groove;

[0009] Mounting holes are oppositely provided on the butting surfaces of the first base plate and the second base plate, and the butted mounting holes are connected by inserted pins;

[0010] Through holes are respectively opened on the outer walls of the first base plate and the second base plate along the direction of base plate butting, and the first base plate and the second base plate are installed and connected by a shaft passing through the through holes on both sides;

[0011] On the first base plate and the second base plate, a first limiting groove is opened between the outer wall and the butting surface of the base plate. The first limiting groove is constricted along the butting direction. When the base plates are butted, the first limiting grooves on both sides are communicated to form a funnel-shaped limiting groove, and are connected by a first tenon fittingly embedded in the funnel-shaped limiting groove;

[0012] On the first substrate and the second substrate, between the base docking surface and the outer wall, a second limiting groove is further provided. When the first substrate of the base is docked with the second substrate of another base, the second limiting groove is in a necking shape along the base docking direction. When the bases are docked, the second limiting grooves on both sides communicate to form a funnel-shaped limiting groove, and are connected by a second tenon fitting conformally in the funnel-shaped limiting groove.

[0013] Furthermore, docking slots are respectively provided on the outer walls of the first substrate and the second substrate corresponding to each other. The docking slots extend and communicate to the docking surface, and are connected by a connecting plate inserted between the two docking slots on both sides;

[0014] At the inner edge of the opening of the docking slot on the outer wall, a limiting flange is further provided, and a section of the connecting plate is limited in the docking slot.

[0015] Furthermore, a cross beam is further provided between adjacent bases. When the bases are docked, both ends of the cross beam are riveted to the connecting plates on the corresponding bases respectively.

[0016] Furthermore, the first limiting groove or the second limiting groove includes a dovetail groove section with an opening towards the corresponding docking direction, and a straight groove section connecting the necking of the dovetail groove section and the corresponding docking surface;

[0017] Correspondingly, the first tenon or the second tenon includes dovetail limiting blocks arranged oppositely on both sides and a straight connecting block connecting the two dovetail limiting blocks on both sides;

[0018] During docking, the dovetail limiting blocks are limited and embedded in the dovetail groove section, and the straight connecting block is embedded in the straight groove section.

[0019] Furthermore, the first limiting groove or the second limiting groove includes a first straight groove section, and a second straight groove section connecting the first straight groove section and the corresponding docking surface; the width of the first straight groove section perpendicular to the docking direction is greater than the width of the second straight groove section;

[0020] Correspondingly, the first tenon or the second tenon includes straight limiting blocks arranged oppositely on both sides and a straight connecting block connecting the two straight limiting blocks on both sides; the width of the straight limiting block perpendicular to the docking direction is greater than the width of the straight connecting block;

[0021] During docking, the straight limiting blocks are embedded in the first straight groove section, and the straight connecting block is embedded in the straight groove section.

[0022] Furthermore, the first limiting groove or the second limiting groove is a dovetail groove section with an opening towards the corresponding docking direction; correspondingly, the first tenon or the second tenon includes dovetail limiting blocks connected oppositely;

[0023] During docking, the dovetail limiting blocks are limited and embedded in the dovetail groove section.

[0024] Further, wiring grooves are respectively formed on the butt joint surfaces of the bases of the first substrate and the second substrate.

[0025] When the bases are butted, the wiring grooves are butted to form a wiring channel.

[0026] Further, through holes are respectively formed on the outer walls of the first substrate and the second substrate, at the sides and bottoms of the groove body, and are installed and connected through corresponding shafts.

[0027] Further, when the bases are butted, the shafts penetrate through and connect the through holes on adjacent bases.

[0028] Further, mounting holes are respectively formed on the outer walls of the first substrate and the second substrate, at the sides and bottoms of the groove body, and the butted mounting holes are connected through corresponding inserted pins.

[0029] The utility model aims to design a base of a low-voltage circuit breaker. The left and right substrates are spliced and combined into a base, and multiple bases are spliced and combined into a multi-pole structure. Multiple mother-daughter grooves and tenon-mortise structures are arranged between the substrates, and are positioned by cylindrical pins. At the same time, screw nuts are arranged for fastening connection, which can be used to carry larger currents and prevent electric arcs from escaping. Small tenon-mortise connections are arranged between the left and right substrates, large tenon-mortise connections are arranged between multiple bases, and are fixed by long shafts and cross beams to ensure the phase synchronization and connection reliability of the circuit breaker. And wiring grooves are arranged on the side surfaces of the bases.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] Without changing the positions of the driving mechanism and the contact system of the circuit breaker, the utility model improves the connection strength by improving the structures such as the fitting joint surface and the connection structure on the substrate, makes up for the insulation between the two substrates, and enhances the strength and operation reliability of the circuit breaker. Description of the Drawings

[0032] Figure 1 It is a schematic assembly structure diagram of a bipolar base in the utility model;

[0033] Figure 2 It is a schematic assembly structure diagram of a bipolar base (one of the second substrates is not shown) in the utility model;

[0034] Figure 3 It is a schematic structure diagram of the base in the utility model;

[0035] Figure 4 、 Figure 5 It is a schematic structure diagram of the first substrate;

[0036] Figure 6 、 Figure 7Schematic structural diagram of the second substrate;

[0037] Figure 8 , Figure 9 , Figure 10 Schematic diagram of the second tenon;

[0038] Explanation of the markings in the figure:

[0039] 1 - First substrate, 111 - Step groove, 171 - Through hole, 2 - Second substrate, 211 - Rib, 3 - Cross beam, 4 - Second tenon, 5 - First tenon, 6 - Shaft, 7 - Connecting plate, 8 - Pin, 10 - Base. Specific implementation mode

[0040] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are implemented on the premise of the above technical solutions of the present utility model, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0041] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] Some implementation manners of the present utility model will be described in detail below in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0043] Embodiment:

[0044] A base of a low - voltage circuit breaker includes a first substrate 1 and a second substrate 2. The first substrate 1 and the second substrate 2 can be docked with each other to form a base 10, and groove bodies are respectively provided on the docking surfaces to dock and form a cavity; the bases 10 can be docked with each other to form a base group;

[0045] To ensure the docking and installation stability between the substrates, in this embodiment, a first docking structure is formed by the insertion and cooperation of convex ribs and grooves, specifically including: a step groove 111 is provided on the inner edge of the opening of the groove body of the first substrate 1, and a rib 211 is correspondingly provided on the inner edge of the opening of the groove body of the second substrate 2. When the substrates are docked, the rib 211 is embedded in the step groove 111; preferably, the rib 211 and the step groove 111 are distributed on the periphery of the groove body, including both sides and the bottom of the groove body, so as to improve the docking effect from different directions;

[0046] This embodiment also constitutes another docking structure through pin hole cooperation, specifically including: mounting holes are relatively provided on the substrate docking surfaces of the first substrate 1 and the second substrate 2, and the docking mounting holes are connected by inserted pins 8; the length of the pin 8 is equivalent to the total length of the mounting holes on both sides, so that there is no gap after the first substrate 1 and the second substrate 2 are docked. Preferably, mounting holes are respectively provided on the outer walls of the first substrate 1 and the second substrate 2, at the sides and bottoms of the groove body, and the docking mounting holes are connected by corresponding inserted pins 8. The pins 8 distributed around the groove body improve the docking effect between the first substrate 1 and the second substrate 2 from different directions; at the same time, ensure the uniqueness of the up-down, front-back positions and the synchronism of the contacts;

[0047] In some specific embodiments, the pin 8 is a cylindrical pin.

[0048] This embodiment also constitutes another docking structure through shaft hole insertion and connection, specifically including: through holes 171 are respectively provided on the outer walls of the first substrate 1 and the second substrate 2 along the substrate docking direction, and the first substrate 1 and the second substrate 2 are installed and connected through a shaft 6 passing through the through holes 171 on both sides. Preferably, through holes 171 are respectively provided on the outer walls of the first substrate 1 and the second substrate 2, at the sides and bottoms of the groove body, and are installed and connected through corresponding shafts 6.

[0049] This embodiment also constitutes another docking structure through a plug-in structure, specifically including: docking slots are respectively provided on the outer walls of the first substrate 1 and the second substrate 2, the docking slots extend and communicate to the docking surface, and the two docking slots on both sides are connected by an inserted connection plate 7; a limiting flange is also provided at the inner edge of the opening of the docking slot on the outer wall, and a section of the connection plate 7 is limited in the docking slot. In addition, the connection plate 7 can be installed and connected to the first substrate 1 and the second substrate 2 through a rivet structure.

[0050] This embodiment also constitutes another docking structure through tenon and mortise insertion and connection, specifically including: a first limiting groove is provided between the outer wall and the substrate docking surface on the first substrate 1 and the second substrate 2, the first limiting groove is constricted along the docking direction, and the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove when the substrates are docked, and are connected by a first tenon 5 conformally embedded in the funnel-shaped limiting groove.

[0051] In some specific embodiments, the first substrate 1 and the second substrate 2 are fastened by multiple screws.

[0052] To ensure the docking and installation stability between the bases, on the one hand, this embodiment also passes a shaft 6 through and connects the through holes 171 on adjacent bases 10 to connect multiple bases 10 in series to ensure the reliability of the connection between the bases 10.

[0053] On the other hand, in this embodiment, a cross beam 3 is further provided between adjacent bases 10. When the bases 10 are butted, both ends of the cross beam 3 are riveted to the connection plates 7 on the corresponding bases 10 respectively.

[0054] In addition, this embodiment can also adopt the insertion and cooperation of tenons and mortises, specifically including: on the first substrate 1 and the second substrate 2, between the butt joint surface and the outer wall of the base, a second limiting groove is further opened. When the first substrate 1 of the base 10 is butted with the second substrate 2 of another base 10, the second limiting groove is in a necking shape along the butt joint direction of the base. When the bases are butted, the second limiting grooves on both sides are communicated to form a funnel-shaped limiting groove, and are connected by a second tenon 4 fittingly embedded in the funnel-shaped limiting groove.

[0055] More specifically, the first limiting groove or the second limiting groove includes a dovetail groove section with an opening facing the corresponding butting direction, and a straight groove section connecting the necking of the dovetail groove section and the corresponding butting surface;

[0056] Correspondingly, the first tenon 5 or the second tenon 4 includes dovetail limiting blocks arranged oppositely on both sides and a straight connecting block connecting the dovetail limiting blocks on both sides;

[0057] When butting, the dovetail limiting blocks are limited and embedded in the dovetail groove section, and the straight connecting block is embedded in the straight groove section.

[0058] The shape of the tenon is not unique. When the shape of the tenon changes, the corresponding mortise on the base also changes synchronously, and it can be Figure 9 or Figure 10 in shape, or other shapes with a narrow middle and wide ends that can ensure reliable connection of the substrate or the base.

[0059] Such as Figure 9 shown, the first limiting groove or the second limiting groove includes a first straight groove section, and a second straight groove section connecting the first straight groove section and the corresponding butting surface; the width of the first straight groove section perpendicular to the butting direction is greater than the width of the second straight groove section;

[0060] Correspondingly, the first tenon 5 or the second tenon 4 includes straight limiting blocks arranged oppositely on both sides and a straight connecting block connecting the straight limiting blocks on both sides; the width of the straight limiting block perpendicular to the butting direction is greater than the width of the straight connecting block;

[0061] When butting, the straight limiting blocks are embedded in the first straight groove section, and the straight connecting block is embedded in the straight groove section.

[0062] Such as Figure 10 shown, the first limiting groove or the second limiting groove is a dovetail groove section with an opening facing the corresponding butting direction; correspondingly, the first tenon 5 or the second tenon 4 includes dovetail limiting blocks connected relatively;

[0063] When butting, the dovetail limiting blocks are limited and embedded in the dovetail groove section.

[0064] In some specific embodiments, wiring grooves 101 are respectively formed on the butt joint surfaces of the bases of the first substrate 1 and the second substrate 2. When the bases are butted, the wiring grooves 101 are butted to form a wiring channel, facilitating wire threading.

[0065] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the utility model. It is obvious that those who are familiar with the technology in this field can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A base of a low-voltage circuit breaker, characterized in that, It includes a first substrate (1) and a second substrate (2); The first substrate (1) and the second substrate (2) can be docked with each other to form a base (10), and grooves are respectively formed on the docking surfaces to form a cavity by docking; the bases (10) can be docked with each other to form a base group; A stepped groove (111) is provided at the inner edge of the groove opening of the first substrate (1), and a rib (211) is correspondingly provided at the inner edge of the groove opening of the second substrate (2). When the substrates are docked, the rib (211) is embedded in the stepped groove (111); Mounting holes are oppositely provided on the substrate docking surfaces of the first substrate (1) and the second substrate (2), and the docked mounting holes are connected by inserted pins (8); Through holes (171) are respectively formed on the outer walls of the first substrate (1) and the second substrate (2) along the substrate docking direction, and the first substrate (1) and the second substrate (2) are installed and connected by a shaft (6) passing through the through holes (171) on both sides; On the first substrate (1) and the second substrate (2), a first limiting groove is formed between the outer wall and the substrate docking surface. The first limiting groove is constricted along the docking direction. When the substrates are docked, the first limiting grooves on both sides are connected to form a funnel-shaped limiting groove, and are connected by a first tenon (5) conformally embedded in the funnel-shaped limiting groove; On the first substrate (1) and the second substrate (2), a second limiting groove is further formed between the base docking surface and the outer wall. When the first substrate (1) of the base (10) is docked with the second substrate (2) of another base (10), the second limiting groove is constricted along the base docking direction. When the bases are docked, the second limiting grooves on both sides are connected to form a funnel-shaped limiting groove, and are connected by a second tenon (4) conformally embedded in the funnel-shaped limiting groove; 2. The base of the low-voltage circuit breaker according to claim 1, characterized in that Docking slots are respectively formed on the outer walls of the first substrate (1) and the second substrate (2). The docking slots extend and communicate to the base docking surface, and the two docking slots on both sides are connected by an inserted connecting plate (7); A limiting flange is further provided at the inner edge of the opening of the docking slot on the outer wall, and a section of the connecting plate (7) is limited in the docking slot; 3. The base of the low-voltage circuit breaker according to claim 2, characterized in that A cross beam (3) is further provided between adjacent bases (10). When the bases (10) are docked, the two ends of the cross beam (3) are respectively riveted to the connecting plates (7) on the corresponding bases (10); 4. The base of the low-voltage circuit breaker according to claim 1, characterized in that, The first limiting groove or the second limiting groove includes a dovetail groove section with an opening facing the corresponding docking direction, and a straight groove section connecting the constriction of the dovetail groove section and the corresponding docking surface; Correspondingly, the first tenon (5) or the second tenon (4) includes dovetail limiting blocks oppositely provided on both sides and a straight connecting block connecting the two dovetail limiting blocks; During docking, the dovetail limiting blocks are limited and embedded in the dovetail groove section, and the straight connecting block is embedded in the straight groove section; 5. The base of the low-voltage circuit breaker according to claim 1, characterized in that The first limiting groove or the second limiting groove includes a first straight groove section, and a second straight groove section connecting the first straight groove section and the corresponding docking surface; the width of the first straight groove section perpendicular to the docking direction is greater than the width of the second straight groove section; Correspondingly, the first tenon (5) or the second tenon (4) includes straight limiting blocks oppositely arranged on both sides and a straight connecting block connecting the two straight limiting blocks on both sides; the width of the straight limiting block perpendicular to the docking direction is greater than the width of the straight connecting block; During docking, the straight limiting block is embedded in the first straight groove section, and the straight connecting block is embedded in the straight groove section.

6. The base of the low-voltage circuit breaker according to claim 1, characterized in that, The first limiting groove or the second limiting groove is a dovetail groove section with an opening facing the corresponding docking direction; correspondingly, the first tenon (5) or the second tenon (4) includes dovetail limiting blocks connected relatively; During docking, the dovetail limiting block is limit-embedded in the dovetail groove section.

7. The base of the low-voltage circuit breaker according to claim 1, characterized in that, Wire grooves (101) are respectively formed on the base docking surfaces of the first substrate (1) and the second substrate (2), When the bases are docked, the wire grooves (101) are docked with each other to form a wire channel.

8. The base of the low-voltage circuit breaker according to claim 1, characterized in that Through holes (171) are respectively formed on the outer walls of the first substrate (1) and the second substrate (2) at the side and bottom of the groove body, and are installed and connected through corresponding shafts (6).

9. The base of the low-voltage circuit breaker according to claim 1, characterized in that, When the bases (10) are docked, the shaft (6) penetrates and connects the through holes (171) on adjacent bases (10).

10. The base of the low-voltage circuit breaker according to claim 1, characterized in that, Mounting holes are respectively formed on the outer walls of the first substrate (1) and the second substrate (2) at the side and bottom of the groove body, and the docked mounting holes are connected through corresponding inserted pins (8).

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