Overload alarm indication mechanism and oil-immersed circuit breaker thereof

Abstract

The utility model discloses an overload alarm indicating mechanism and an oil-immersed circuit breaker thereof, which comprise a mounting seat fixed on the cylinder wall of an oil tank, an alarm indicating lamp arranged on the mounting seat, an alarm circuit connected with the alarm indicating lamp, and an overload trigger structure arranged on the circuit breaker and used for controlling the connection or disconnection of the alarm circuit, the alarm circuit comprises a conducting rod which is arranged on the mounting base and electrically connected with the alarm indicator lamp and an alarm wire connected with the conducting rod, the conducting rod and the alarm wire are in pluggable connection through a plug-in structure, mounting and connection are convenient, and excellent electrical performance and mechanical performance are achieved; a traditional welding or crimping mode is avoided, the installation structure is simplified, modular connection is realized, the installation efficiency is improved, a user can observe the lighting of the alarm indicating lamp from the outside of the oil tank so as to remind the user of a circuit overload fault, and thus the overload alarm function of the oil immersed circuit breaker is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field, concretely relates to a circuit breaker overload alarm mechanism and oil immersed circuit breaker thereof. BACKGROUND

[0002] Oil immersed circuit breaker is a kind of power switch device using high insulation oil as medium.In power system, oil immersed circuit breaker is mainly used for the protection and control of power transmission and distribution network, can cut off and isolate fault current in circuit, protect power equipment and personal safety.When overload, voltage loss, under voltage or short circuit fault occurs in circuit, circuit breaker can automatically cut off circuit, avoid endangering the safety of staff and normal operation of equipment due to circuit fault.

[0003] The existing oil immersed circuit breaker has overload protection function, and the overload protection is realized by the overload tripping mechanism of the circuit breaker to trip and open the circuit breaker, since the oil immersed circuit breaker is installed in the transformer oil tank, the outside does not know what causes the circuit breaker to trip, especially in some important workplaces, if the circuit breaker is automatically disconnected due to overload in the circuit, it will often cause heavy economic loss, therefore, the circuit breaker needs to give a warning in advance when overload occurs in the circuit to remind the user to remove the circuit fault as soon as possible, the existing method is to set alarm indicator lamp cooperating with the circuit breaker on the oil tank barrel, the overload triggering structure of the circuit breaker is used to connect or disconnect the alarm loop of the alarm indicator lamp, only when the circuit breaker is overloaded, the alarm indicator lamp will be triggered to turn on, the alarm indicator lamp has a conductive rod connected with the wire of the alarm loop, the wire and the conductive rod are connected by direct welding or wiring nose crimping, so the installation and disassembly are relatively inconvenient, and it is very inconvenient for subsequent maintenance, the whole installation process is complex, and the installation efficiency is low. SUMMARY

[0004] Therefore, the utility model solves the technical problem that the wire and the conductive rod are connected by direct welding or wiring nose crimping in the prior art, the installation and disassembly are relatively inconvenient, and it is very inconvenient for subsequent maintenance, the whole installation process is complex, and the installation efficiency is low.

[0005] In order to solve the above technical problems, the utility model provides an overload alarm indication mechanism, including the mounting seat fixed on the oil tank cylinder wall and the alarm indicator lamp set on the mounting seat, and the alarm circuit connected with the alarm indicator lamp, and the overload trigger structure set in the circuit breaker for controlling the alarm circuit is connected or disconnected, the alarm circuit includes the electrically conductive rod set on the mounting seat and electrically connected with the alarm indicator lamp, and the alarm wire connected with the electrically conductive rod, the electrically conductive rod and the alarm wire are connected through the plug structure and form the pluggable connection, the plug structure includes the connector part set on the electrically conductive rod, and the plug part is correspondingly set on the alarm wire and is inserted with the connector part.

[0006] In the overload alarm indication mechanism, the connector part is the spring structure set on the electrically conductive rod, the plug part is the spring terminal set on the alarm wire, and the spring structure has the spring hole suitable for the insertion of the spring terminal.

[0007] In the overload alarm indication mechanism, the spring structure includes the spring bottom plate and the two elastic lock holding parts formed by the opposite bending of the two sides of the spring bottom plate, and the two elastic lock holding parts are connected with the spring bottom plate to form the spring hole of M-shaped structure.

[0008] In the overload alarm indication mechanism, the spring terminal has the spring sheet suitable for being inserted into the spring hole, and the locking hole is arranged on the spring sheet, and the spring bottom plate is provided with the locking block in the spring hole, which is locked with the locking hole.

[0009] In the overload alarm indication mechanism, the connector part is the bullet type female connector set on the electrically conductive rod, the plug part is the bullet type male plug set on the alarm wire, the female connector includes the connector insertion hole formed by the embracing of the arc spring sheet, and the male plug is inserted into the connector insertion hole and is tightly held by the arc spring sheet.

[0010] In the overload alarm indication mechanism, the mounting seat is provided with the mounting through hole for mounting the alarm indicator lamp and the electrically conductive rod, the alarm indicator lamp is screw connected at one end of the mounting through hole, and the electrically conductive rod is connected with the alarm wire at the other end of the mounting through hole.

[0011] In the overload alarm indication mechanism, the mounting seat is screw connected with the sealing lamp shade covering the alarm indicator lamp, and the electrically conductive rod is provided with the sealing sleeve sealed in the other end of the mounting through hole between the electrically conductive rod and the mounting through hole.

[0012] The overload alarm indicating mechanism has the advantages that the overload triggering structure includes two wiring terminals arranged on one side of the circuit breaker and in series in the alarm circuit, and a spring conducting piece arranged in the circuit breaker and used for connecting the two wiring terminals, the alarm wire is connected with the wiring terminals, one elastic contact of the spring conducting piece is in contact with one of the wiring terminals, and the other elastic contact of the spring conducting piece extends to connect the alarm tripping piece, the alarm tripping piece has a locking state in which the alarm tripping piece is positioned with the overload tripping structure of the circuit breaker, and a tripping state in which the alarm tripping piece is separated from the overload tripping structure and rotates.

[0013] The overload alarm indicating mechanism has the advantages that the mounting seat is fixedly connected with the circuit breaker through the support structure, the support structure includes a general support fixedly connected with the mounting seat, and side supports arranged on two sides of the circuit breaker and fixedly connected with the general support, the side supports are connected with the wiring terminals, and at least one wire clamping ring is arranged on the side supports.

[0014] The utility model discloses still provide a kind of oil-immersed circuit breaker, including shell, contact mechanism, overload tripping structure, short-circuit tripping structure and any one of the overload alarm indicating mechanism described above.

[0015] The utility model technical scheme has the following advantages compared with prior art:

[0016] 1. The overload alarm indicating mechanism provided by the utility model has the advantages that the joint part is arranged on the conducting rod, and the plug part that cooperates with the joint part is arranged on the alarm wire, so that the conducting rod and the alarm wire are connected through the cooperation of the joint part and the plug part, realizing the circuit connection between the alarm indicating lamp and the alarm wire. Therefore, when the circuit breaker fails due to overload, the alarm circuit is connected through the overload triggering structure, so as to control the lighting of the alarm indicating lamp. The plug-in connection between the alarm indicating lamp and the alarm wire is realized through the plug-in connector, which is convenient to install and connect, has excellent electrical and mechanical properties, can realize circuit connection between the alarm wire and the alarm indicating lamp, avoids traditional welding or crimping, simplifies the installation structure, facilitates subsequent installation and maintenance, is more compact, realizes modular connection, and improves installation efficiency.

[0017] 2. In the overload alarm indicator mechanism provided by this utility model, the connector component is preferably a spring-loaded structure disposed on the conductive rod, and the plug component is preferably a spring-loaded terminal disposed on the alarm wire. With this structure, the conductive rod and the alarm wire are electrically connected through the insertion and engagement of the spring-loaded structure and the spring-loaded terminal. When the spring-loaded terminal is inserted into the spring-loaded hole, the two elastic locking parts of the spring-loaded structure are compressed and elastically deformed, thus elastically locking the spring-loaded terminal, thereby maintaining a tight and stable electrical contact between the spring-loaded structure and the spring-loaded terminal. This connection between the conductive rod and the alarm wire using a spring-loaded structure has the characteristics of high reliability, gentle pull-out force, low contact resistance, shock resistance, and impact resistance.

[0018] 3. In the overload alarm indicator mechanism provided by this utility model, the alarm indicator light is threadedly connected to one end of the mounting through hole, and the conductive rod passes through the mounting through hole and is electrically connected to the alarm indicator light. By setting a sealing sleeve between the conductive rod and the mounting through hole, sealing the other end of the mounting through hole, and threading a sealing lamp cover covering the alarm indicator light onto the connecting boss, and by sealing the mounting through hole with the sealing lamp cover, the two ends of the mounting through hole are sealed through the sealing lamp cover and the sealing sleeve, thereby ensuring the sealing performance of the conductive rod and the alarm indicator light, preventing leakage accidents at the installation positions of the conductive rod and the alarm indicator light, providing good sealing effect, safety and reliability, extending service life, and improving the protection level and performance of the product.

[0019] 4. In the overload alarm indication mechanism provided by this utility model, the wire is fixed to the side bracket by passing the cable tie through the wire clamp, so that the wire can be routed and wired along the side bracket, ensuring neat and standardized wiring and avoiding messy wiring.

[0020] 5. In the overload alarm indication mechanism provided by this utility model, when the circuit breaker is overloaded, the overload tripping structure separates from the alarm tripping component to release the positioning engagement. This causes the alarm tripping component to rotate under the force of the spring conductive component and switch from the locked state to the tripping state. At this time, after the spring conductive component recovers its deformation, it connects to the two terminals, thereby connecting the alarm circuit and triggering the alarm indicator light to illuminate, thus realizing the overload alarm function. The advantage of this technical solution is that when the circuit breaker is overloaded, the alarm indicator light is triggered by the cooperation of the spring conductive component and the two terminals to indicate the alarm function, so as to remind the user that there is a circuit overload fault. This allows the user to judge and choose whether to disconnect the circuit or to eliminate the circuit fault as soon as possible, thereby avoiding major losses caused by the sudden disconnection of the circuit. This realizes the overload alarm function of the oil-immersed circuit breaker. Attached Figure Description

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 The structure schematic diagram of the oil-immersed circuit breaker provided by the present application is shown in the figure.

[0023] Figure 2 The structure schematic diagram of the overload alarm indication mechanism of the present application is shown in the figure.

[0024] Figure 3 The cross-sectional structure schematic diagram of the overload alarm indication mechanism shown in the figure is shown in the figure. Figure 2

[0025] The cross-sectional structure schematic diagram of the overload alarm indication mechanism shown in the figure is shown in the figure. Figure 4

[0026] The cross-sectional structure schematic diagram of another mode of the plug-in structure of the present application is shown in the figure. Figure 5

[0027] The cross-sectional structure schematic diagram of the plug-in structure shown in the figure is shown in the figure. Figure 6 Figure 5 The cross-sectional structure schematic diagram of the plug-in structure shown in the figure is shown in the figure.

[0028] Figure 7 The structure schematic diagram of the overload triggering structure and the overload tripping structure of the present application is shown in the figure.

[0029] The figure mark explanation: 1, mounting seat; 11, mounting through hole; 2, alarm indication lamp; 3, conductive rod; 31, insulating sheath; 4, alarm wire; 5, plug-in structure; 51, plug-in spring structure; 511, plug-in spring bottom plate; 512, elastic locking part; 513, plug-in spring hole; 514, locking block; 52, plug-in spring terminal; 521, plug-in spring piece; 522, locking hole; 53, female terminal; 54, male plug; 6, sealing lampshade; 7, sealing sleeve; 8, overload triggering structure; 81, wiring terminal; 82, spring conductive part; 83, alarm tripping part; 9, overload tripping structure; 91, double gold structure; 92, elastic relocking part; 100, circuit breaker; 101, oil tank wall; 102, total support; 103, side support; 104, wire clamping ring; 105, accommodation gap. Specific embodiments

[0030] ​The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Embodiment

[0034] The present embodiment provides an overload alarm indicating mechanism as shown in Figures 1-7 The present embodiment provides an overload alarm indicating mechanism as shown in

[0035] The above embodiment is the core technical scheme of the present embodiment. By arranging the connector part on the conductive rod 3 and arranging the plug part on the alarm wire 4 to be plugged into the connector part, the conductive rod 3 and the alarm wire 4 are connected through the cooperation of the connector part and the plug part, thereby realizing the circuit connection between the alarm indicator lamp 2 and the alarm wire 4. Therefore, when the circuit breaker 100 fails due to overload, the alarm circuit is connected through the overload triggering structure 8, thereby controlling the lighting of the alarm indicator lamp 2. The advantages of the present technical scheme are that the alarm indicator lamp 2 is connected to the alarm wire 4 through the plug-in connection of the conductive rod 3, which is convenient to install and has excellent electrical and mechanical properties, can realize the circuit connection between the alarm wire 4 and the alarm indicator lamp 2, avoid the use of traditional welding or pressure connection, simplify the installation structure, facilitate subsequent installation and maintenance, make the structure more compact, realize modular connection, and improve the installation efficiency.

[0036] The following will be described in detail Figures 1-6 The arrangement of the plug-in structure will be described in detail.

[0037] As a preferred embodiment, referring to Figures 1-4 The connector part is a spring structure 51 arranged on the conductive rod 3, and the plug part is a spring terminal 52 arranged on the alarm wire 4. The spring structure 51 has a spring hole 513 suitable for the insertion of the spring terminal 52, that is, the spring structure 51 and the spring terminal 52 constitute the plug-in structure 5 connecting the alarm wire 4 and the conductive rod 3. Specifically, the spring structure 51 includes a spring bottom plate 511 and two elastic locking parts 512 formed by bending the side edges of the spring bottom plate 511 on both sides. The two elastic locking parts 512 are connected with the spring bottom plate 511 to form an M-shaped spring hole 513. With this structure, the conductive rod 3 and the alarm wire 4 are electrically connected through the plug-in cooperation of the spring structure 51 and the spring terminal 52. When the spring terminal 52 is inserted into the spring hole 513, the two elastic locking parts 512 of the spring structure 51 are elastically deformed and elastically locked to the spring terminal 52, so that the spring structure 51 and the spring terminal 52 maintain close and stable electrical contact. This plug-in connection of the conductive rod and the alarm wire has the characteristics of high reliability, soft pulling force, small contact resistance, shock resistance, and impact resistance.

[0038] In order to improve the reliability of the connection between the spring structure 51 and the spring terminal 52, as Figure 4As shown, the spring insertion terminal 52 has a spring insertion piece 521 suitable for insertion into the spring insertion hole 513, and a locking hole 522 arranged on the spring insertion piece 521, the spring insertion bottom plate 511 is provided with a locking block 514 in the spring insertion hole 513, which forms a locking fit with the locking hole 522, the spring insertion piece 521 is in contact with the spring insertion bottom plate 511, increasing the contact area and having good conductivity, when the spring insertion piece 521 is inserted into the spring insertion hole 513, the locking block 514 is clamped into the locking hole 522, so that the spring insertion structure 51 and the spring insertion terminal 52 play a locking connection role, preventing the spring insertion terminal 52 from being loose in position, and having good installation stability.

[0039] As an alternative to the above-mentioned plug-in structure, referring to Figures 5-6 As shown, the connector component is a bullet-shaped female connector 53 arranged on the conductive rod 3, and the plug component is a bullet-shaped male plug 54 arranged on the alarm wire 4, the female connector 53 includes a connector insertion hole formed by a circular arc spring ring, and the male plug 54 is inserted into the connector insertion hole and held tightly by the circular arc spring, with a holding force greater than 5N, increasing the contact surface to keep the male plug 54 and the female connector 53 in close contact. This structure is arranged such that when installing, as long as the male plug 54 is inserted into the insertion hole of the female connector 53, the plug-in connection of the male plug 54 and the female connector 53 is achieved to realize the electrical connection relationship between the alarm wire 4, the conductive rod 3 and the alarm indicator lamp 2, and keep the male plug 54 and the female connector 53 in close contact. As can be seen, the bullet-shaped plug-in component can also achieve quick plug-in connection between the alarm wire 4 and the conductive rod 3. Those skilled in the art can choose the specific arrangement of the plug-in structure 5 according to the above description, and other equivalent embodiments will not be described here.

[0040] In this embodiment, the mounting seat 1 is provided with a mounting through hole 11 for mounting the alarm indicator lamp 2 and the conductive rod 3, the alarm indicator lamp 2 is threadedly connected to one end of the mounting through hole 11, the conductive rod 3 is connected to the alarm wire 4 by passing through the other end of the mounting through hole 11, and an insulating sheath is sleeved on the conductive rod, only the two ends of the conductive rod are connected to the alarm indicator lamp and the plug-in structure as conductive points, which design makes the conductive rod insulated from the mounting seat and the oil tank cylinder wall through the insulating sheath.

[0041] In order to ensure the installation sealing of the alarm indicator 2, the mounting seat 1 is threadedly connected with a sealing lamp cover 6 covering the alarm indicator 2, and a sealing sleeve 7 is arranged between the conductive rod 3 and the other end of the mounting through hole 11. Through the above structure, the conductive rod 3 is arranged in the mounting through hole 11 and electrically connected with the alarm indicator 2, the sealing connection between the conductive rod 3 and the mounting through hole 11 is realized through the sealing sleeve 7, the other end of the mounting through hole 11 is sealed, and the sealing lamp cover 6 seals and covers one end of the mounting through hole 11. Thus, the two ends of the mounting through hole 11 are sealed through the sealing lamp cover 6 and the sealing sleeve 7, so as to ensure the sealing of the installation of the conductive rod 3 and the alarm indicator 2, prevent leakage accidents at the installation positions of the conductive rod 3 and the alarm indicator 2, have good sealing effect, be safe and reliable, prolong the service life, and be beneficial to improving the product protection level and use performance.

[0042] The specific setting mode of the overload triggering structure will be described in detail below. Figure 1 and Figure 7 The specific setting mode of the overload triggering structure will be described in detail below.

[0043] The overload triggering structure 8 includes two wiring terminals 81 arranged on one side of the circuit breaker 100 and in series on the alarm circuit, a spring conducting piece 82 arranged in the circuit breaker 100 for connecting the two wiring terminals 81, and an alarm tripping piece 83 arranged in the circuit breaker 100 and driven by the overload tripping structure 9, one end of the wiring terminal 81 is inserted into the circuit breaker 100, and the other end is extended out of the side surface of the circuit breaker 100, the alarm wire 4 is connected with the wiring terminal 81, one elastic contact of the spring conducting piece 82 is in contact with the wiring terminal 81, and the other elastic contact extends to connect the alarm tripping piece 83, the alarm tripping piece 83 has a locking state in position with the overload tripping structure 9 of the circuit breaker 100, and a tripping state of being separated from the overload tripping structure 9 and rotating. The structure is arranged, when the circuit breaker 100 works normally, the alarm tripping piece 83 is in the locking state and presses the spring conducting piece 82, so that the spring conducting piece 82 is elastically deformed under pressure and away from one of the wiring terminals 81, that is, the alarm circuit is disconnected; in the case of overload of the circuit breaker 100, the alarm tripping piece 83 is separated from the overload tripping structure 9 to release the position matching, so that the alarm tripping piece 83 rotates under the action of the spring conducting piece 82 and switches from the locking state to the tripping state, and the spring conducting piece 82 is connected with the two wiring terminals 81 after restoring the deformation, so as to connect the alarm circuit and trigger the alarm indicator lamp 2 to light, realizing the overload alarm function. The advantage of the technical scheme is that when the circuit breaker is overloaded, the alarm indication function of the alarm indicator lamp 2 is triggered by the cooperation of the spring conducting piece 82 and the two wiring terminals 81, to prompt the user that there is a circuit overload fault, so that the user can artificially judge and select whether to cut off the circuit, or make the user quickly eliminate the circuit fault, thereby avoiding significant losses caused by sudden disconnection of the circuit, and realizing the overload alarm function of the oil immersed circuit breaker.

[0044] As shown in Figure 1 The mounting seat 1 is fixedly connected with the circuit breaker 100 through a support structure, the support structure includes a total support 102 fixedly connected with the mounting seat 1, and side supports 103 arranged on both sides of the circuit breaker 100 and fixedly connected with the total support 102, the side support 103 is connected with the wiring terminal 81, at least one wire clamping ring 104 is arranged on the side support 103, and a gap 105 is arranged on the top of the side of the circuit breaker, which can be passed through by the wire; the wire is fixed on the side support 103 by passing through the wire clamping ring 104, so that the wire can be wired along the side support 103, ensuring that the wiring is neat and standard, and avoiding disordered wiring.

[0045] In the embodiment, the mounting seat 1, the total bracket 102 and the side bracket 103 are metal pieces, and the circuit of the alarm indicator lamp 2 is connected in two ways. In one way, the positive pole of the alarm indicator lamp 2 is electrically connected with one of the wire terminals 81 through the conductive rod 3 and the alarm wire 4. According to the threaded connection of the alarm indicator lamp 2 on the mounting seat 1, the negative pole is electrically connected with the other wire terminal 81 through the mounting seat 1, the total bracket 102 and the side bracket 103, so as to form an alarm circuit connected with the alarm indicator lamp 2. In another way of connecting the alarm indicator lamp 2, the positive pole and the negative pole of the alarm indicator lamp 2 are connected with two wire terminals 81 through the alarm wire 4, so as to form an alarm circuit connected with the alarm indicator lamp 2.

[0046] Embodiment 2

[0047] The embodiment provides an oil-immersed circuit breaker as shown in Figure 1 and Figure 7 The oil-immersed circuit breaker comprises a shell, a contact mechanism, an overload tripping structure 9, a short-circuit tripping structure and the overload alarm indicating mechanism described in the embodiment 1. The overload tripping structure 9 mainly comprises a double-gold structure 91 and an elastic re-docking part 92. The elastic re-docking part 92 is rotationally arranged in the shell and abuts against the double-gold structure 91 and the alarm tripping part 83 respectively. The elastic re-docking part 92 positions and holds the alarm tripping part 83 in a locked state. The double-gold structure 91 is connected to a main circuit of the circuit breaker 100. When an overload fault occurs in a circuit, the double-gold structure 91 is heated and bent to push the elastic re-docking part 92 to rotate away from one side of the alarm tripping part 83, so that the elastic re-docking part 92 is separated from the alarm tripping part 83, that is, the positioning and cooperation between the overload tripping structure 9 and the alarm tripping part 83 is released. At this time, the alarm tripping part 83 is rotated under the action of the spring conductive part 82, so that the spring conductive part 82 is connected to the two wire terminals 81 after the spring conductive part 82 restores the deformation, thereby connecting the alarm circuit to realize the overload alarm function. A user can observe the lighting of the alarm indicator lamp 2 from the outside of the oil tank, so as to prompt the user that an overload fault occurs in the circuit, and the user can artificially judge and select whether to cut off the circuit, thereby avoiding a significant loss caused by the sudden disconnection of the circuit, and thus the overload alarm function of the oil-immersed circuit breaker 100 is realized.

[0048] Obviously, the above embodiment is only an example for clearly illustrating, but not a limitation of the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. An overload alarm indication mechanism, comprising a mounting base (1) fixed on the wall (101) of an oil tank and an alarm indicator light (2) disposed on the mounting base (1), an alarm circuit connected to the alarm indicator light (2), and an overload triggering structure (8) disposed on a circuit breaker (100) for controlling the connection or disconnection of the alarm circuit, characterized in that: The alarm circuit comprises a conductive rod (3) electrically connected with the alarm indicator (2) on the mounting base (1), and an alarm wire (4) connected with the conductive rod (3), the conductive rod (3) and the alarm wire (4) are connected through a plug structure (5), the plug structure (5) comprises a connector part arranged on the conductive rod (3) and a plug part arranged on the alarm wire (4) and matched with the connector part.

2. An overload warning indicating mechanism according to claim 1, wherein: The connector part is a spring structure (51) arranged on the conductive rod (3), and the plug part is a spring terminal (52) arranged on the alarm wire (4), the spring structure (51) has a spring hole (513) suitable for the spring terminal (52) to be inserted.

3. An overload warning indicating mechanism according to claim 2, wherein: The spring structure (51) comprises a spring bottom plate (511) and two elastic locking parts (512) formed by bending the side edges on both sides of the spring bottom plate (511), the two elastic locking parts (512) and the spring bottom plate (511) form an M-shaped spring hole (513).

4. An overload warning indicating mechanism according to claim 3, wherein: The spring terminal (52) has a spring piece (521) suitable for being inserted into the spring hole (513), and a locking hole (522) arranged on the spring piece (521), the spring bottom plate (511) is provided with a locking block (514) in the spring hole (513) and forms a locking fit with the locking hole (522).

5. An overload warning indicating mechanism according to claim 1, wherein: The connector part is a bullet-shaped female connector (53) arranged on the conductive rod (3), and the plug part is a bullet-shaped male plug (54) arranged on the alarm wire (4), the female connector (53) comprises a connector insertion hole formed by a circular arc spring ring, and the male plug (54) is inserted into the connector insertion hole and is tightly held by the circular arc spring.

6. An overload warning indicating mechanism according to any one of claims 1 to 5, wherein: The mounting base (1) is provided with a mounting through hole (11) for mounting the alarm indicator (2) and the conductive rod (3), the alarm indicator (2) is threadedly connected at one end of the mounting through hole (11), the conductive rod (3) passes through the other end of the mounting through hole (11) and is connected with the alarm wire (4), and the conductive rod (3) is sleeved with an insulating sheath (31).

7. An overload warning indicating mechanism according to claim 6, wherein: The mounting base (1) is threadedly connected with a sealing lampshade (6) covering the alarm indicator (2), and a sealing sleeve (7) is arranged between the conductive rod (3) and the mounting through hole (11) and is sealed in the other end of the mounting through hole (11).

8. An overload warning indicating mechanism according to claim 1, wherein: The overload trigger structure (8) comprises two connection terminals (81) arranged on one side of the circuit breaker (100) and in series on the alarm circuit, and a spring conducting piece (82) arranged in the circuit breaker (100) for connecting the two connection terminals (81), the alarm wire (4) is connected with the connection terminals (81), one elastic contact of the spring conducting piece (82) is in contact with one of the connection terminals (81), and the other elastic contact of the spring conducting piece (82) extends to connect an alarm tripping piece (83), the alarm tripping piece (83) has a locking state in position cooperation with the overload tripping structure (9) of the circuit breaker (100), and a tripping state in which the alarm tripping piece (83) is separated from the overload tripping structure (9) and rotates.

9. An overload warning indicating mechanism according to claim 8, wherein: The mounting seat (1) is fixedly connected with the circuit breaker (100) through a support structure, the support structure comprises a total support (102) fixedly connected with the mounting seat (1), and side supports (103) arranged on both sides of the circuit breaker (100) and fixedly connected with the total support (102), one of the side supports (103) is connected with one of the connection terminals (81), and at least one wire clamping ring (104) is arranged on the side support (103).

10. An oil immersed circuit breaker characterized by, The circuit breaker comprises a housing, a contact mechanism, an overload tripping structure (9), a short-circuit tripping structure and the overload alarm indication mechanism according to any one of claims 1-9.

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