Unlocking device for residual-current circuit breaker

Abstract

The utility model belongs to the field of circuit breakers, and particularly relates to an unlocking device for a residual-current circuit breaker, which comprises a shell, the shell is provided with a left cavity and a right cavity, a movable groove is arranged in the left cavity, the movable groove is communicated with the right cavity, and a mounting groove is arranged in the right cavity; through the structural design of the tripping needle, the supporting rod and the rotating rod, the unlocking process is simplified to be completed only through direct linkage of the coil iron core and the rotating rod, a complex multi-component linkage structure in a traditional unlocking mechanism is removed, the number of parts is reduced, the assembling difficulty is lowered, the overall structure is more compact, and the reliability is improved. According to the electric leakage circuit breaker, miniaturization of the whole size is achieved, installation and maintenance are convenient, due to the fact that an intermediate transmission link is omitted, precision loss caused by matching errors among components is reduced in the unlocking process, the coil iron core directly drives the rotating rod to rotate, accuracy and timeliness of tripping action are ensured, and the protection performance of the electric leakage circuit breaker is improved.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to an unlocking device for a leakage circuit breaker. Background Art

[0002] In the power system, the importance of leakage circuit breaker as a key safety protection device is self-evident. It can quickly cut off the circuit when it detects that the leakage current exceeds the preset threshold, thereby protecting the safety of personnel and equipment. However, the existing leakage circuit breaker often has problems such as complex structure and inconvenient operation during operation, especially the unlocking and tripping link.

[0003] Specifically, the traditional release mechanism of leakage circuit breakers is usually composed of multiple parts, which need to be precisely linked to each other to achieve the release action. This design not only increases the manufacturing cost and difficulty, but may also lead to inaccurate and untimely release due to component wear or inaccurate matching during long-term use. In addition, the complex structure also means more maintenance workload, increasing operation and maintenance costs. Utility Model Content

[0004] In order to overcome the problem that the components of the tripping mechanism in the prior art need precise linkage to achieve unlocking action, which is not accurate enough and inconvenient, the utility model proposes an unlocking device for a leakage circuit breaker.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an unlocking device for a leakage circuit breaker, comprising a shell, the shell having a left chamber and a right chamber, a movable groove is opened in the left chamber, the movable groove is communicated with the right chamber, the right chamber has a mounting groove, a toggle piece is rotatably connected in the mounting groove, one end of the toggle piece is connected to a tripping pin, and one end of the tripping pin extends into the left chamber through the movable groove.

[0006] A support rod is arranged in the movable groove, the outer wall of the support rod is rotatably connected with a rotating rod, and a resisting piece for resisting the tripping pin is arranged on the rotating rod.

[0007] Preferably, a coil core is fixedly connected in the left chamber, a push rod and a core spring for causing the push rod to reset are arranged on the coil core, and the push rod cooperates with the rotating rod.

[0008] Preferably, the rotating rod is in an "L" shape, and a circular hole is provided on the rotating rod to fit with the support rod in a clearance.

[0009] Preferably, a U-shaped groove is provided at the top of the rotating rod, and the top rod is in a "T" shape. The top rod passes through the U-shaped groove and cooperates with the rotating rod.

[0010] Preferably, the abutment member comprises an abutment block arranged at the bottom of the rotating rod, an annular groove for abutting against the tripping pin is formed on the abutment block, and a second gasket is arranged on the inner wall of the annular groove.

[0011] Preferably, the second gasket is made of elastic material.

[0012] Preferably, a first gasket is provided on the inner wall of the movable groove, and the first gasket is made of elastic material.

[0013] Preferably, a mounting groove is provided on the top of the shell, a switch lever is arranged in the mounting groove, and one end of the toggle piece is connected to the switch lever.

[0014] The utility model is beneficial in that:

[0015] 1. The utility model simplifies the unlocking process to be completed only by the direct linkage of the coil core and the rotating rod through the structural design of the tripping pin, the support rod and the rotating rod, and removes the complex multi-component linkage structure in the traditional unlocking mechanism, which not only reduces the number of parts, but also reduces the difficulty of assembly, making the overall structure more compact, realizing the miniaturization of the overall volume, and facilitating installation and maintenance. Since the intermediate transmission link is reduced, the device reduces the accuracy loss caused by the matching error between components during the unlocking process. The coil core directly drives the rotating rod to rotate, ensuring the accuracy and timeliness of the tripping action, and improving the protection performance of the leakage circuit breaker;

[0016] 2. The utility model ensures that the rotating rod can firmly contact the tripping needle during the rotation process through the structural design of the resistance block, the annular groove and the second gasket, effectively preventing the occurrence of slipping, improving the stability of the tripping operation, and significantly extending the service life of the device, reducing the failure rate and maintenance cost caused by slipping.

[0017] 3. The utility model arranges a first gasket at one end of the inner wall of the movable groove. When the rotating rod rotates and contacts the tripping pin, the first gasket can effectively absorb the vibration generated by the contact between the tripping pin and the inner wall of the movable groove, thereby protecting other precision parts from vibration damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is the overall structural schematic diagram of the leakage circuit breaker;

[0020] Figure 2 Schematic diagram of the internal structure of the leakage circuit breaker;

[0021] Figure 3 It is a schematic diagram of the right side structure of the shell;

[0022] Figure 4 It is a schematic diagram of the left side structure of the shell;

[0023] Figure 5 is a schematic diagram of the structure of the unlocking device;

[0024] Figure 6 It is a schematic diagram of the matching structure of the rotating rod and the tripping pin;

[0025] Figure 7 It is a structural schematic diagram of the rotating rod.

[0026] In the figure: 1, shell; 101, left chamber; 102, right chamber; 1020, installation groove; 103, assembly groove; 104, movable groove; 1040, first gasket; 2, switch lever; 3, toggle plate; 301, tripping pin; 4, support rod; 5, rotating rod; 501, U-shaped groove; 6, resistance block; 601, annular groove; 602, second gasket; 7, coil core; 701, top rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The following is combined with Figure 1 —7 further details of this application,

[0029] The present application embodiment discloses an unlocking device for a leakage circuit breaker. Figure 1 - Figure 7 An unlocking device for a leakage circuit breaker includes a shell 1, the shell 1 has a left chamber 101 and a right chamber 102, the left chamber 101 is provided with a movable groove 104, the movable groove 104 is communicated with the right chamber 102, the right chamber 102 has a mounting groove 1020, a toggle piece 3 is rotatably connected in the mounting groove 1020, one end of the toggle piece 3 is connected to a tripping pin 301, and one end of the tripping pin 301 extends into the left chamber 101 through the movable groove 104.

[0030] A support rod 4 is disposed in the movable groove 104 . A rotating rod 5 is rotatably connected to the outer wall of the support rod 4 . A resisting piece for resisting the tripping pin 301 is disposed on the rotating rod 5 .

[0031] Furthermore, a mutual inductor and a leakage detection circuit board are also provided in the housing 1.

[0032] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7 The left chamber 101 is fixedly connected with a coil core 7 , and the coil core 7 is provided with a push rod 701 and a core spring for causing the push rod 701 to return to its original position, and the push rod 701 cooperates with the rotating rod 5 .

[0033] By arranging the coil core 7 to cooperate with the rotating rod 5, after the coil core 7 receives the signal, it can be attracted, so that the top rod 701 descends to drive the rotating rod 5 to rotate, thereby realizing the tripping operation.

[0034] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7 The shape of the rotating rod 5 is "L"-shaped, and a circular hole is opened on the rotating rod 5 to match the clearance of the supporting rod 4.

[0035] By designing the rotating rod 5 into an “L” shape, one end can be linked to the coil core 7 , and the other end can be linked to the tripping pin 301 .

[0036] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7 A U-shaped groove 501 is formed at the top of the rotating rod 5 , and the top rod 701 is in a “T” shape. The top rod 701 passes through the U-shaped groove 501 and cooperates with the rotating rod 5 .

[0037] The U-shaped groove 501 is provided to facilitate the assembly of the rotating rod 5 , and cooperates with the top rod 701 to complete the release operation.

[0038] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7 The resisting member includes a resisting block 6 arranged at the bottom of the rotating rod 5, and the resisting block 6 is provided with an annular groove 601 for resisting the tripping pin 301. The inner wall of the annular groove 601 is provided with a second gasket 602, and the second gasket 602 is made of elastic material.

[0039] By providing the abutment, it is ensured that the rotating rod 5 can firmly abut the tripping pin 301 during the rotation process, effectively preventing the occurrence of slipping, improving the stability of the tripping operation, and significantly extending the service life of the device, reducing the failure rate and maintenance cost caused by slipping.

[0040] Reference Figure 4 A first gasket 1040 is disposed on the inner wall of the movable groove 104 , and the first gasket 1040 is made of elastic material.

[0041] By providing the first gasket 1040 , the vibration generated by the contact between the tripping pin 301 and the inner wall of the movable groove 104 can be effectively absorbed, thereby protecting other precision components from being damaged by the vibration.

[0042] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A mounting groove 103 is formed on the top of the housing 1 , a switch lever 2 is disposed in the mounting groove 103 , and one end of the toggle piece 3 is connected to the switch lever 2 .

[0043] The movement of the tripping pin 301 drives the toggle plate 3 to rotate, and the rotation of the toggle plate 3 drives the switch lever 2 to rotate, thereby realizing a short-circuit operation.

[0044] Working principle: When leakage occurs in the circuit breaker, the mutual inductor gives a signal to the leakage detection circuit board, thereby controlling the coil core to be attracted, causing the top rod 701 to descend, which can drive the rotating rod 5 to rotate. The rotating rod 5 rotates toward the tripping pin 301 and causes the resistance block 6 to push the tripping pin 301. The movement of the tripping pin 301 causes the toggle plate to rotate and then the switch toggle rod 2 to rotate, thereby achieving a tripping effect.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An unlocking device for a residual current circuit breaker, comprising a housing (1), characterized in that: The housing (1) comprises a left chamber (101) and a right chamber (102); a movable groove (104) is provided in the left chamber (101); the movable groove (104) is communicated with the right chamber (102); a mounting groove (1020) is provided in the right chamber (102); a toggle plate (3) is rotatably connected in the mounting groove (1020); one end of the toggle plate (3) is connected to a tripping pin (301); one end of the tripping pin (301) extends into the left chamber (101) through the movable groove (104); A support rod (4) is arranged in the movable groove (104), and the outer wall of the support rod (4) is rotatably connected to a rotating rod (5), and a resisting piece for resisting a tripping pin (301) is arranged on the rotating rod (5).

2. The unlocking device for a leakage circuit breaker according to claim 1, characterized in that: A coil core (7) is fixedly connected inside the left chamber (101), a push rod (701) and a core spring for causing the push rod (701) to return to its original position are provided on the coil core (7), and the push rod (701) cooperates with the rotating rod (5).

3. The unlocking device for a leakage circuit breaker according to claim 2, characterized in that: The rotating rod (5) is in an "L" shape, and is provided with a circular hole which is gap-matched with the support rod (4).

4. The unlocking device for a leakage circuit breaker according to claim 2, characterized in that: A U-shaped groove (501) is provided at the top of the rotating rod (5), and the top rod (701) is in a "T" shape. The top rod (701) passes through the U-shaped groove (501) and then cooperates with the rotating rod (5).

5. The unlocking device for a leakage circuit breaker according to claim 1, characterized in that: The resisting member comprises a resisting block (6) arranged at the bottom of the rotating rod (5), the resisting block (6) being provided with an annular groove (601) for resisting the tripping pin (301), and a second gasket (602) being provided on the inner wall of the annular groove (601).

6. The unlocking device for a leakage circuit breaker according to claim 5, characterized in that: The second gasket (602) is made of elastic material.

7. The unlocking device for a leakage circuit breaker according to claim 1, characterized in that: The inner wall of the movable groove (104) is provided with a first gasket (1040), and the first gasket (1040) is made of elastic material.

8. The unlocking device for a leakage circuit breaker according to claim 1, characterized in that: The top of the housing (1) is provided with an assembly groove (103), a switch lever (2) is arranged in the assembly groove (103), and one end of the toggle piece (3) is connected to the switch lever (2).

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