Circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker which comprises a circuit breaker shell, a conductive feeler lever is rotatably arranged on the inner wall of the circuit breaker shell, and an electromagnetic release is arranged on the inner wall of the circuit breaker shell and located at the conductive feeler lever. The electromagnetic tripper is used for forcing the conductive feeler lever to move so as to enable a circuit to be connected or disconnected, a supporting plate is arranged on the inner wall of the circuit breaker shell, a buffering assembly is arranged on the supporting plate, a reciprocating assembly is arranged on the buffering assembly, and the reciprocating assembly forces the buffering assembly to return to the original position. An energy absorption assembly is arranged on the supporting plate. In conclusion, according to the circuit breaker, the motion strength of the conductive feeler lever can be slowed down, the motion amplitude of the two ends of the conductive feeler lever is reduced, the conductive feeler lever is greatly buffered, the situation that the conductive feeler lever collides with parts in the short-circuiter to cause damage is avoided, protection of the circuit breaker is facilitated, and the service life of the circuit breaker is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker. Background Art

[0002] Circuit breaker refers to a switch device that can close, carry and interrupt the current under normal or abnormal circuit conditions. It is an important electrical device for the protection and operation of the power system. It can be used to distribute electric energy, start asynchronous motors infrequently, and protect power lines and motors. There are many structures and types of circuit breakers, but they are basically composed of a conductive main circuit, an insulating support, an arc extinguishing chamber and an operating mechanism.

[0003] In the existing patent 202010957940.5, an operating mechanism of a circuit breaker is disclosed, including a pushing handle rotatably connected to the outer shell and a handle auxiliary mechanism connected to the pushing handle and used to assist in fixing the pushing handle. An energy storage shaft is installed at the center position of the pushing handle, and a deflection hole for accommodating the movement of the pushing handle is provided on the outer shell. An electromagnetic release connected to the outer shell is provided on the side of the energy storage shaft away from the deflection hole, and a contact conductive sheet connected to the outer shell is provided at one end of the electromagnetic release. The present invention can perform multi-stage snap-in operation with a stronger snap-in effect, and also has a safety function, thereby avoiding the phenomenon of separation after closing.

[0004] In the above structure, since the conductive contacts of the operating mechanism will rebound, but no buffer structure is provided, the conductive contacts of the operating mechanism will collide with the internal components of the circuit breaker and cause damage, which is not conducive to the protection of the circuit breaker and reduces the service life of the circuit breaker. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a circuit breaker to solve the problem that when there is no buffer structure, the conductive contacts of the operating mechanism will collide with the internal components of the circuit breaker and cause damage, which is not conducive to the protection of the circuit breaker and reduces the service life of the circuit breaker.

[0006] Based on the above purpose, the utility model provides a circuit breaker, including a circuit breaker housing, an inner wall of the circuit breaker housing is rotatably provided with a conductive contact rod, the inner wall of the circuit breaker housing is provided with an electromagnetic release at the conductive contact rod, the electromagnetic release is used to force the conductive contact rod to move so as to connect or disconnect the circuit, the inner wall of the circuit breaker housing is provided with a support plate, a buffer assembly is provided on the support plate, a reciprocating assembly is provided on the buffer assembly, the reciprocating assembly forces the buffer assembly to return to its original position, and an energy absorbing assembly is provided on the support plate, the energy absorbing assembly is used to absorb the energy stored in the reciprocating assembly.

[0007] Preferably, the buffer assembly includes a cylinder body arranged on the support plate, the cylinder body is filled with hydraulic oil, a sliding rod is slidably arranged on the cylinder body, a piston matched with the cylinder body is arranged at the end of the sliding rod, and a top plate is arranged at the other end of the sliding rod. When the power is off, the conductive contact rod hits the top plate.

[0008] Preferably, the reciprocating assembly includes a spring arranged between the cylinder body and the top plate, and the spring is sleeved on the outer ring of the sliding rod.

[0009] Preferably, the energy absorbing assembly includes a storage tube arranged on the support plate, and a connecting tube is arranged on the cylinder body, and the other end of the connecting tube is connected to the storage tube.

[0010] Preferably, the diameter of the connecting pipe communicating with the cylinder body is larger than the diameter of the connecting pipe communicating with the storage pipe.

[0011] Preferably, a buffer belt is provided on the top plate, and the buffer belt is in direct contact with the head of the conductive contact rod to protect the top plate.

[0012] The beneficial effects of the utility model are as follows: when encountering a circuit fault, the electromagnetic releaser is activated to cause the conductive contact rod to rotate, thereby forming a circuit break. At this time, the conductive contact rod will separate from the contact, and the head of the conductive contact rod will hit the buffer component. The buffer component buffers the conductive contact rod, forcing the movement amplitude of the conductive contact rod to be reduced, and the reciprocating component forces the buffer component to return to its original position. The energy absorption component absorbs the stored energy of the reciprocating component, thereby forcing the buffer component to slowly return to its original position, reducing the rebound height of the conductive contact rod, and reducing the possibility of free contact between the conductive contact rod and the contact. In summary, a circuit breaker of the present application can slow down the movement force of the conductive contact rod, reduce the movement amplitude of both ends of the conductive contact rod, greatly buffer the conductive contact rod, and avoid the conductive contact rod from hitting the internal components of the short-circuit breaker and causing damage, which is beneficial to the protection of the circuit breaker and improves the service life of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or 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 in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a front view of the utility model;

[0015] Figure 2 It is a physical diagram of the internal structure of the utility model;

[0016] Figure 3It is a partial structural entity diagram of the utility model;

[0017] Figure 4 For the utility model Figure 3 A three-dimensional half-section view of .

[0018] The markings in the figure are: 1. Circuit breaker housing; 2. Conductive contact rod; 3. Electromagnetic release; 4. Support plate; 5. Buffer assembly; 501. Cylinder body; 502. Sliding rod; 503. Piston; 504. Top plate; 6. Reciprocating assembly; 601. Spring; 7. Energy absorption assembly; 701. Storage tube; 702. Connecting tube; 8. Buffer belt. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a circuit breaker comprises a circuit breaker housing 1, the inner wall of the circuit breaker housing 1 is rotatably provided with a conductive contact rod 2, the inner wall of the circuit breaker housing 1 is provided with an electromagnetic release 3 located at the conductive contact rod 2, the electromagnetic release 3 is a prior art, and acts simultaneously with the conductive contact rod 2, the electromagnetic release 3 is used to force the conductive contact rod 2 to move so as to make the circuit conductive or disconnected, the inner wall of the circuit breaker housing 1 is provided with a support plate 4, the support plate 4 is provided with a buffer assembly 5, the buffer assembly 5 is provided with a reciprocating assembly 6, the reciprocating assembly 6 forces the buffer assembly 5 to return to its original position, the support plate 4 is provided with an energy absorbing assembly 7, and the energy absorbing assembly 7 is used to absorb the energy stored in the reciprocating assembly 6.

[0021] Working principle: When encountering a circuit fault, the electromagnetic release 3 is activated to cause the conductive contact rod 2 to rotate, thereby forming a circuit break. At this time, the conductive contact rod 2 will be separated from the contact, and the head of the conductive contact rod 2 hits the buffer component 5. The buffer component 5 buffers the conductive contact rod 2, forcing the movement amplitude of the conductive contact rod 2 to be reduced, and the reciprocating component 6 forces the buffer component 5 to return to its original position. The energy absorption component 7 absorbs the stored energy of the reciprocating component 6, thereby forcing the buffer component 5 to slowly return to its original position, reducing the rebound height of the conductive contact rod 2, and reducing the possibility of free contact between the conductive contact rod 2 and the contact; in summary, a circuit breaker of the present application can slow down the movement force of the conductive contact rod 2, reduce the movement amplitude of both ends of the conductive contact rod 2, greatly buffer the conductive contact rod 2, and avoid the conductive contact rod 2 from hitting the internal components of the short-circuit breaker and causing damage, which is beneficial to the protection of the circuit breaker and improves the service life of the circuit breaker.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a circuit breaker, the buffer assembly 5 includes a cylinder body 501 arranged on a support plate 4, the cylinder body 501 is filled with hydraulic oil, a slide rod 502 is slidably arranged on the cylinder body 501, the slide rod 502 penetrates the cylinder body 501, a piston 503 adapted to the cylinder body 501 is arranged at the end of the slide rod 502, the piston 503 is located inside the cylinder body 501, and a top plate 504 is arranged at the other end of the slide rod 502. When the power is off, the conductive contact rod 2 hits the top plate 504.

[0023] Working principle: when the power is off, the head of the conductive contact rod 2 hits the top plate 504, and the top plate 504 is subjected to force, forcing the sliding rod 502 to slide inside the cylinder 501, and the sliding rod 502 drives the piston 503 to move inside the cylinder 501, so that the piston 503 pushes the hydraulic oil to move, and the hydraulic oil enters the energy absorption component 7. When the conductive contact rod 2 returns to the position at the time of impact, the hydraulic oil will enter the cylinder 501 from the energy absorption component 7, forcing the piston 503 to move in the opposite direction, and the piston 503 drives the sliding rod 502 to move in the opposite direction inside the cylinder 501, so that the top plate 504 drives the conductive contact rod 2 to move to the position at the time of impact. The setting of the buffer component 5 is convenient for reducing the impact force of the conductive contact rod 2, buffering the conductive contact rod 2, reducing the movement amplitude of the conductive contact rod 2, and preventing the conductive contact rod 2 from colliding with the internal components of the short circuit breaker and causing damage, which is beneficial to the protection of the circuit breaker and prolonging the service life of the circuit breaker.

[0024] like Figure 2 and Figure 3 As shown, a circuit breaker, the reciprocating assembly 6 includes a spring 601 arranged between a cylinder body 501 and a top plate 504, the spring 601 is sleeved on the outer ring of a slide bar 502, two ends of the spring 601 respectively abut against the cylinder body 501 and the top plate 504, and the spring 601 is arranged along the length direction of the slide bar 502.

[0025] Working principle: when the top plate 504 is subjected to force, the top plate 504 drives the slide bar 502 to slide in the cylinder body 501. As the top plate 504 slowly approaches the cylinder body 501, the spring 601 is compressed. At this time, the spring 601 stores energy. When the conductive contact rod 2 is separated from the top plate 504, the spring 601 will rebound due to its elasticity, forcing the slide bar 502 to slide out of the cylinder body 501, so that the head of the conductive contact rod 2 returns to the position at the time of impact. At the same time, hydraulic oil is introduced into the cylinder body 501 from the energy absorption component 7, forcing the piston 503 to drive the slide bar 502 to move. The setting of the reciprocating component 6 facilitates the conductive contact rod 2 to return to the position at the time of impact, improves the function of the buffer component 5, and improves the flexibility and stability of the device. The setting of the spring 601 can store energy and facilitate the retreat of the slide bar 502.

[0026] like Figure 3 and Figure 4As shown, a circuit breaker, the energy absorption assembly 7 includes a storage tube 701 arranged on the support plate 4, a connecting tube 702 is arranged on the cylinder body 501, and the other end of the connecting tube 702 is connected to the storage tube 701.

[0027] Working principle: Since the spring 601 is elastic and can store energy, it can avoid that the spring 601 generates a large rebound force on the head of the conductive feeler rod 2 when it rebounds. The hydraulic oil in the storage tube 701 is introduced into the cylinder body 501 through the action of the connecting tube 702. The hydraulic oil pushes the piston 503 to move slowly, forcing the slide rod 502 to move slowly, so that the spring 601 slowly returns to its original state. The setting of the energy absorption component 7 is conducive to absorbing the energy stored in the spring 601, so that the spring 601 slowly returns to its original state, avoids that the spring 601 generates a large rebound force, reduces the force of the top plate 504 on the conductive feeler rod 2, improves stability, and at the same time cooperates with the friction between the piston 503 and the inner wall of the cylinder body 501 to further slowly return the spring 601 to its original state.

[0028] like Figure 4 As shown, in a circuit breaker, the diameter of the connecting pipe 702 communicating with the cylinder 501 is larger than the diameter of the connecting pipe 702 communicating with the storage pipe 701.

[0029] Working principle: When the connecting pipe 702 is connected, the caliber of the connection between the connecting pipe 702 and the cylinder body 501 is larger than the caliber of the connection between the connecting pipe 702 and the storage pipe 701, so that the flow rate of the hydraulic oil in the cylinder body 501 introduced into the storage pipe 701 is greater than the flow rate of the hydraulic oil in the storage pipe 701 introduced into the cylinder body 501, so that the hydraulic oil slowly flows into the cylinder body 501, slowing down the speed of the piston 503 moving in the cylinder body 501, so that the sliding rod 502 moves slowly, forcing the spring 601 to move slowly, and further making the spring 601 slowly return to its original state, reducing the kinetic energy of the spring 601 rebound, and improving stability.

[0030] like Figure 3 and Figure 4 As shown, a circuit breaker is provided with a buffer strip 8 on the top plate 504 , and the buffer strip 8 is in direct contact with the head of the conductive contact rod 2 to protect the top plate 504 .

[0031] Working principle: When the conductive contact rod 2 hits the top plate 504, it directly contacts the buffer belt 8 to avoid the conductive contact rod 2 directly hitting the top plate 504. The setting of the buffer belt 8 avoids the direct force of the conductive contact rod 2 on the top plate 504, which is beneficial to the protection of the top plate 504 and improves the service life of the top plate 504.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A circuit breaker, characterized in that: The invention comprises a circuit breaker housing (1), wherein a conductive contact rod (2) is rotatably arranged on the inner wall of the circuit breaker housing (1), an electromagnetic release (3) is arranged on the inner wall of the circuit breaker housing (1) at the conductive contact rod (2), and the electromagnetic release (3) is used to force the conductive contact rod (2) to move so as to make the circuit conductive or disconnected, a support plate (4) is arranged on the inner wall of the circuit breaker housing (1), a buffer component (5) is arranged on the support plate (4), a reciprocating component (6) is arranged on the buffer component (5), and the reciprocating component (6) forces the buffer component (5) to return to its original position, and an energy absorption component (7) is arranged on the support plate (4), and the energy absorption component (7) is used to absorb the energy stored in the reciprocating component (6).

2. A circuit breaker according to claim 1, characterized in that: The buffer assembly (5) comprises a cylinder body (501) arranged on the support plate (4), the cylinder body (501) is filled with hydraulic oil, a slide rod (502) is slidably arranged on the cylinder body (501), a piston (503) adapted to the cylinder body (501) is arranged at the end of the slide rod (502), and a top plate (504) is arranged at the other end of the slide rod (502), and when power is off, the conductive contact rod (2) hits the top plate (504).

3. A circuit breaker according to claim 2, characterized in that: The reciprocating assembly (6) comprises a spring (601) arranged between the cylinder body (501) and the top plate (504), and the spring (601) is sleeved on the outer ring of the sliding rod (502).

4. A circuit breaker according to claim 3, characterized in that: The energy absorbing assembly (7) comprises a storage pipe (701) arranged on the support plate (4); a connecting pipe (702) is arranged on the cylinder body (501); the other end of the connecting pipe (702) is connected to the storage pipe (701).

5. A circuit breaker according to claim 4, characterized in that: The diameter of the connection pipe (702) communicating with the cylinder (501) is larger than the diameter of the connection pipe (702) communicating with the storage pipe (701).

6. A circuit breaker according to claim 5, characterized in that: A buffer belt (8) is provided on the top plate (504), and the buffer belt (8) is in direct contact with the head of the conductive contact rod (2) to protect the top plate (504).

Images