Sealed circuit breaker operating mechanism

Abstract

An operating mechanism for a solid-sealed circuit breaker according to the present invention, a translation slot (201) and an arc-shaped slot (202) are formed on a mounting plate (104). The lower end of a first push plate (1.1) of the solid-sealed circuit breaker operation is hinged to a guide sleeve of a contact compression spring assembly (301) through a fifth shaft (2.5). The fifth shaft (2.5) is slidably arranged in the translation slot (201). The middle part of a second push plate (1.2) is hinged to the mounting plate (104) through a second shaft (2.2). The lower end of the second push plate (1.2) is connected to the mounting plate (104) through a tripping pull spring (3). The upper end of a third push plate (1.3) and the lower end of a fourth push plate (1.4) are hinged through a third shaft (2.3). The third shaft (2.3) is located in the arc-shaped slot (202). The middle part of the fourth push plate (1.4) is hinged to the mounting plate (104). The upper part of the fourth push plate (1.4) is hinged to the end of a push-pull rod (103). An operating mechanism for a solid-sealed circuit breaker according to the present invention has a reliable structure and a large pressure-bearing capacity.

Description

Technical Field

[0001] The present invention relates to an operating mechanism for a solid-sealed circuit breaker, belonging to the technical field of circuit breakers. Background Art

[0002] Currently, due to the usage requirements of small floor area and large transformer capacity in urban construction, box-type substations for wind power and photovoltaic projects, the application of solid-sealed circuit breakers is becoming more and more widespread; however, the mechanisms for operating the solid-sealed pole columns of conventional solid-sealed circuit breakers often have a single structure and poor pressure-bearing capacity; during the closing process of the circuit breaker, especially when pushing the compression overtravel opening spring, the required torque is relatively large, which places high requirements on the opening spring operating mechanism of the switch and increases the manufacturing cost of the mechanism; after closing, the conventional force conduction to the main shaft bears a large pressure and is prone to deformation during use, thus affecting its reliability and service life; moreover, the conventional structure is prone to large opening rebounds after opening, and the opening distance decreases after the arc is extinguished, which may cause the arc to reignite and affect the breaking of the circuit breaker; therefore, there is an urgent need for an operating mechanism for a solid-sealed circuit breaker that can solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above deficiencies and provide an operating mechanism for a solid-sealed circuit breaker with a reliable structure and large pressure-bearing capacity.

[0004] The purpose of the present invention is achieved as follows:

[0005] An operating mechanism for a solid-sealed circuit breaker, the operating mechanism of the solid-sealed circuit breaker is arranged on a mounting plate, and a translation groove and an arc groove are formed on the mounting plate. The lower end of the first push plate of the solid-sealed circuit breaker operation is hinged to the guide sleeve of the contact spring assembly through a fifth shaft, and the fifth shaft is slidably arranged in the translation groove. The upper end of the first push plate, the upper end of the second push plate, and the lower end of the third push plate are hinged at the same place through a first shaft. The middle part of the second push plate is hinged to the mounting plate through a second shaft, and the lower end of the second push plate is connected to the mounting plate through an opening spring. The upper end of the third push plate and the lower end of the fourth push plate are hinged through a third shaft, and the third shaft is located in the arc groove. The middle part of the fourth push plate is hinged to the mounting plate through a fourth shaft, and the upper part of the fourth push plate is hinged to the end of a push rod.

[0006] The working principle of the operating mechanism of the encapsulated circuit breaker of the present invention is as follows: During the closing process of the switch, the push plate four rotates around the shaft four as the center rotation point, and finally drives the shaft five to move to the left in the linear groove to complete the closing process; during the closing stroke, the push plate four uses half of the rotation angle of the rotation stroke to complete two-thirds of the closing stroke of the shaft five. At this time, as long as the switch overcomes the force of the opening spring, when the shaft five completes the remaining one-third of the closing stroke distance, the push plate four still has half of the rotation angle to complete. At this time, the switch has to bear a large torque of the contact compression spring; the push plate four uses a large rotation stroke to complete a small closing stroke, so as to ensure reliable closing even when a large torque of the contact compression spring needs to be borne, and reduce the requirements for the opening spring operating mechanism of the switch.

[0007] For the operating mechanism of the encapsulated circuit breaker of the present invention, after closing: The shaft one is near the connection line of the shaft two and the shaft five, and the shaft three is near the connection line of the shaft one and the shaft four.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] When in use, since the opening spring in the present invention is built into the operating mechanism of the encapsulated circuit breaker, it can be installed on all three phases. In the prior art, since one end of the spring is installed on the crank arm of the driving main shaft and the other end is fixed to the frame, only one spring can be installed and it cannot be installed on the three phases simultaneously; therefore, after the improvement of the structure, after the switch opens, the energy released by the stretching potential energy of the three opening springs can quickly act on the shaft four, making the switch opening more direct and reliable; moreover, the three-phase installation method also ensures the synchronization of the three-phase opening of the switch.

[0010] At the same time, the present invention uses an operating mechanism with two-stage transmission. At the initial stage of closing, a large closing torque is used to push a small closing stroke, reducing the closing force required by the main spring of the opening spring operating mechanism of the switch and reducing the cost of the opening spring operating mechanism of the switch; after closing, the two push plates in the mechanism that approach 180 degrees can not only ensure sufficient closing force but also reduce the force borne by the driving main shaft, so that neither the driving main shaft nor the switch frame needs to be specially strengthened to meet the closing operation; after opening, the built-in structure of the opening spring directly acts on the arc extinguishing chamber guide rod, improving the opening performance of the switch; the overall structure is more compact and ingenious. Through the linkage design of multiple push plates, it can bear greater pressure, is not easily deformed, has a longer service life and is more reliable. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the application state of the operating mechanism of the encapsulated circuit breaker of the present invention.

[0012] Figure 2 It is a schematic diagram of the structure of the operating mechanism of the encapsulated circuit breaker of the present invention.

[0013] Figure 3 For the present invention Figure 2 is the rear view.

[0014] Figure 4 For the present invention Figure 2 is the side view.

[0015] Figure 5 and Figure 6 are schematic diagrams of the positions between the respective shafts after the closing of the operating mechanism of a solid-sealed circuit breaker according to the present invention.

[0016] Figure 7 are schematic diagrams of the positions between the respective shafts after the opening of the operating mechanism of a solid-sealed circuit breaker according to the present invention.

[0017] Wherein:

[0018] frame 101, solid-sealed pole column 102, push-pull rod 103, mounting plate 104, driving main shaft 105

[0019] translation slot 201, arc slot 202;

[0020] contact compression spring assembly 301;

[0021] push plate one 1.1, push plate two 1.2, push plate three 1.3, push plate four 1.4;

[0022] shaft one 2.1, shaft two 2.2, shaft three 2.3, shaft four 2.4, shaft five 2.5;

[0023] opening draw spring 3. Specific embodiments

[0024] Referring to Figures 1 - 7 , a solid-sealed circuit breaker operating mechanism according to the present invention, a solid-sealed pole column 102 is correspondingly arranged at each upper part of the frame 101, and the contact compression spring assembly 301 connected to each solid-sealed pole column 102 is driven by a corresponding push-pull rod 103 after passing through a corresponding set of solid-sealed circuit breaker operating mechanisms;

[0025] The operating mechanism of the encapsulated circuit breaker is arranged on the mounting plate 104. The mounting plate 104 is provided with a translation groove 201 and an arc groove 202. The lower end of the first push plate 1.1 of the encapsulated circuit breaker operation is hinged to the guide sleeve of the contact spring assembly 301 through the fifth shaft 2.5, and the fifth shaft 2.5 is slidably arranged in the translation groove 201. The upper end of the first push plate 1.1, the upper end of the second push plate 1.2 and the lower end of the third push plate 1.3 are hinged to the same point through the first shaft 2.1. The middle part of the second push plate 1.2 is hinged to the mounting plate 104 through the second shaft 2.2, and the lower end of the second push plate 1.2 is connected to the mounting plate 104 through the opening spring 3. The upper end of the third push plate 1.3 and the lower end of the fourth push plate 1.4 are hinged through the third shaft 2.3, and the third shaft 2.3 is located in the arc groove 202. The middle part of the fourth push plate 1.4 is hinged to the mounting plate 104 through the fourth shaft 2.4. The upper part of the fourth push plate 1.4 is hinged to one end of the push rod 103, and the other end of the push rod 103 is hinged to the rocker arm sleeved on the driving main shaft 105.

[0026] Further, the center point of the fourth shaft 2.4 is located on the left side of the connection line between the hinge point of the fourth push plate 1.4 and the push rod 103 and the center point of the third shaft 2.3.

[0027] Further, the center point of the second shaft 2.2 is located on the right side of the connection line between the hinge point of the opening spring 3 and the second push plate 1.2 and the center point of the first shaft 2.1.

[0028] Further, after the switch is closed, the relationship between the various shafts of the operating mechanism of the encapsulated circuit breaker is as follows: the first shaft 2.1 is located near the connection line between the second shaft 2.2 and the fifth shaft 2.5 (that is, the included angle β shown in Figure 6 is about 180°), and the third shaft 2.3 is located near the connection line between the first shaft 2.1 and the fourth shaft 2.4 (that is, the included angle α shown in Figure 6 is about 180°); preferably, the first shaft 2.1 is located on the connection line between the second shaft 2.2 and the fifth shaft 2.5 (that is, the included angle β is 180°), and the third shaft 2.3 is located on the connection line between the first shaft 2.1 and the fourth shaft 2.4 (that is, the included angle α is 180°).

[0029] In addition, it should be noted that the above specific implementation manner is only an optimized solution of this patent. Any changes or improvements made by those skilled in the art based on the above conceptions are within the protection scope of this patent.

Claims

1. An operating mechanism for a solid-sealed circuit breaker, characterized in that: The operating mechanism of the encapsulated circuit breaker is arranged on the mounting plate (104). A translation slot (201) and an arc slot (202) are formed on the mounting plate (104). The lower end of the first push plate (1.1) of the encapsulated circuit breaker operation is hinged to the guide sleeve of the contact spring assembly (301) through the fifth shaft (2.5), and the fifth shaft (2.5) is slidably arranged in the translation slot (201). The upper end of the first push plate (1.1), the upper end of the second push plate (1.2) and the lower end of the third push plate (1.3) are hinged at the same place through the first shaft (2.1). The middle part of the second push plate (1.2) is hinged to the mounting plate (104) through the second shaft (2.2), and the lower end of the second push plate (1.2) is connected to the mounting plate (104) through the opening spring (3). The upper end of the third push plate (1.3) and the lower end of the fourth push plate (1.4) are hinged through the third shaft (2.3), and the third shaft (2.3) is located in the arc slot (202). The middle part of the fourth push plate (1.4) is hinged to the mounting plate (104) through the fourth shaft (2.4), and the upper part of the fourth push plate (1.4) is hinged to the end of the push-pull rod (103).

2. The operating mechanism of a hermetically sealed circuit breaker according to claim 1, characterized in that: After closing: The first shaft (2.1) is near the connection line of the second shaft (2.2) and the fifth shaft (2.5), and the third shaft (2.3) is near the connection line of the first shaft (2.1) and the fourth shaft (2.4).

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