Flexible closing knife switch for primary and secondary deep fusion circuit breaker

Abstract

The utility model relates to the field of circuit breaker control technology, especially the elastic closing knife switch of a primary and secondary deep fusion circuit breaker, including a main assembly seat, a first column, a second column and a third column, a lateral connection frame for installing the second column is fixedly mounted on the side wall of the main assembly seat, and the first column is fixedly mounted on the upper end of the main assembly seat. The elastic closing knife switch of the utility model applied to the primary and secondary deep fusion circuit breaker adopts a movable extrusion method to strengthen the assembly firmness of the knife switch and the contact end connection plate, which can not only improve the conductive stability, but also extend the service life; by adopting the method of separating the two sides first and then the top, the resistance during separation can be reduced, and the difficulty of operation can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker control, in particular to an elastic closing knife switch applied to a primary and secondary deep fusion circuit breaker. Background Art

[0002] The primary and secondary fusion circuit breaker is a protection device composed of primary protection, secondary protection, fuses and electrical operating mechanisms. It can realize primary and secondary protection of the circuit at the same time, and can be flexibly set according to needs. Its main working principle is that when a circuit fault is found, the primary protection uses a protection relay to detect the fault signal, and cuts off the disconnector, grounding switch and other equipment through the electrical operating mechanism. For the secondary protection, it will be protected by various methods such as automatic protection, power failure protection, circuit breaker thermal protection, circuit breaker overload protection and short circuit protection.

[0003] In order to improve safety, the current primary and secondary fusion circuit breakers mostly use lateral control rods to control all isolation switches. However, the current isolation switches are mainly connected through contact springs at the connection ends. This connection method is easy to cause deformation of the springs after long-term use, resulting in reduced contact firmness, thereby affecting the connection stability. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the current isolation knife switch is mainly connected by a contact spring at the connection end. After long-term use, this connection method is easy to cause the contact firmness to decrease due to the deformation of the spring, thereby affecting the connection stability.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an elastic closed knife switch applied to a primary and secondary deep fusion circuit breaker, comprising a main assembly seat, a first column, a second column and a third column, a lateral connecting frame for installing the second column is fixedly mounted on the side wall of the main assembly seat, the first column is fixedly mounted on the upper end of the main assembly seat, a transverse control shaft controlled by a lateral control rod is mounted inside the lateral connecting frame, a rotation control seat for controlling the third column is axially sleeved on the transverse control shaft, and an elastic flip knife switch for connecting the first column and the second column is movably mounted on the third column.

[0006] A lateral connecting seat for movably mounting an elastic flip knife switch is fixedly mounted on the side wall of the first column.

[0007] A first control bracket for connecting to a return spring and a second control bracket for connecting to the bottom end of the third column are staggered and fixedly mounted on the outer side surface of the rotation control seat.

[0008] The elastic flip knife gate includes a flip knife with a side shaft movably mounted on a lateral connecting seat, an arc-shaped external clamping piece fixedly mounted on the two side walls of the flip knife, an external extrusion frame sleeved on the outside of the flip knife, and a lateral limiting shaft installed inside the external extrusion frame.

[0009] A longitudinal adjustment opening matched with the transverse limiting shaft is provided inside the flip gate knife and the arc-shaped external clamping piece.

[0010] A first lateral connecting plate is fixedly mounted on the top of the first column, and a second lateral connecting plate matched with the arc-shaped external clamping piece is fixedly mounted on the top of the second column.

[0011] The beneficial effects of the utility model are:

[0012] (1) The elastic closing knife switch of the utility model applied to the primary and secondary deep fusion circuit breaker adopts the active extrusion method to strengthen the assembly firmness of the knife switch and the contact end connecting plate, which can not only improve the conductive stability but also prolong the service life;

[0013] (2) By separating the two sides first and then the top, the resistance during separation can be reduced and the difficulty of operation can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a side view of the utility model.

[0017] Figure 3 It is a schematic diagram of the internal structure of the elastic flip knife switch in the utility model. DETAILED DESCRIPTION

[0018] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Figure 1, Figure 2 and Figure 3 The elastic closing knife switch shown in the figure for primary and secondary deep fusion circuit breakers includes a main assembly seat 1, a first column 2, a second column 3 and a third column 4. A lateral connecting frame 5 for installing the second column 3 is fixedly mounted on the side wall of the main assembly seat 1. The first column 2 is fixedly mounted on the upper end of the main assembly seat 1. A transverse control shaft 7 controlled by a lateral control rod 6 is mounted inside the lateral connecting frame 5. A rotation control seat 8 for controlling the third column 4 is axially sleeved on the transverse control shaft 7. An elastic flip knife switch 9 for connecting the first column 2 and the second column 3 is movably mounted on the third column 4.

[0021] In order to cooperate with the lateral connection, a lateral connection seat 10 for movably mounting the elastic flip knife switch 9 is fixedly mounted on the side wall of the first column 2.

[0022] In order to cooperate with the elastic rotation reset and flip extrusion control, a first control bracket 12 for connecting the reset spring 11 and a second control bracket 13 for connecting the bottom end of the third column 4 are staggered and fixedly assembled on the outer side of the rotation control seat 8.

[0023] In order to cooperate with the control, the elastic flip knife gate 9 includes a flip knife gate 91 movably mounted on a side shaft on a lateral connecting seat 10, an arc-shaped external clamping piece 92 fixedly mounted on the two side walls of the flip knife gate 91, an external extrusion frame 93 sleeved on the outside of the flip knife gate 91 and a transverse limit shaft 94 installed inside the external extrusion frame 93.

[0024] In order to facilitate assembly and limiting, a longitudinal adjustment opening 95 that matches the transverse limiting shaft 94 is provided inside the flip gate 91 and the arc-shaped external clamping piece 92 .

[0025] For the purpose of cooperative connection, a first lateral connecting plate 14 is fixedly mounted on the top of the first column 2 , and a second lateral connecting plate 15 matched with the arc-shaped external clamping piece 92 is fixedly mounted on the top of the second column 3 .

[0026] The first lateral connecting plate 14 at the top of the first column 2 and the second lateral connecting plate 15 at the top of the second column 3 are both used for external connection lines. The upper end of the second lateral connecting plate 15 also has a connector that matches the arc-shaped external clamping piece 92. The third column 4 is pulled downward, and the external extrusion frame 93 at the top of the third column 4 squeezes the arc-shaped external clamping pieces 92 on both sides downward, and the gap between the arc-shaped external clamping pieces 92 on both sides is reduced. Then the transverse limiting shaft 94 squeezes the longitudinal adjustment port 95 downward, driving the flip knife 91 to flip downward, and the arc-shaped external clamping piece 92 with the reduced gap is firmly fixed on the connector at the upper end of the second lateral connecting plate 15;

[0027] When separating, the third column 4 is squeezed upward, controlling the external extrusion frame 93 to separate from the arc-shaped external clamping pieces 92 on both sides, and the gap between the arc-shaped external clamping pieces 92 on both sides becomes larger. Then the transverse limiting shaft 94 squeezes the longitudinal adjustment port 95 upward, driving the flip gate 91 to flip upward, and separating the arc-shaped external clamping piece 92 with the enlarged gap from the connecting head at the upper end of the second lateral connecting plate 15.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An elastic closing knife switch used in a primary and secondary deep fusion circuit breaker, comprising a main assembly seat (1), a first column (2), a second column (3) and a third column (4), characterized in that: A lateral connection frame (5) for mounting a second column (3) is fixedly mounted on the side wall of the main assembly seat (1); the first column (2) is fixedly mounted on the upper end of the main assembly seat (1); a transverse control shaft (7) controlled by a lateral control rod (6) is mounted inside the lateral connection frame (5); a rotation control seat (8) for controlling a third column (4) is axially sleeved on the transverse control shaft (7); and an elastic flip knife switch (9) for connecting the first column (2) and the second column (3) is movably mounted on the third column (4).

2. The elastic closing knife switch applied to the primary and secondary deep fusion circuit breaker according to claim 1 is characterized in that: A lateral connecting seat (10) for movably mounting an elastic flip knife switch (9) is fixedly mounted on the side wall of the first upright column (2).

3. The elastic closing knife switch applied to the primary and secondary deep fusion circuit breaker according to claim 1 is characterized in that: A first control bracket (12) for connecting to a return spring (11) and a second control bracket (13) for connecting to the bottom end of a third column (4) are staggered and fixedly mounted on the outer side surface of the rotation control seat (8).

4. The elastic closing knife switch applied to the primary and secondary deep fusion circuit breaker according to claim 2 is characterized in that: The elastic flip knife gate (9) comprises a flip knife gate (91) movably mounted on a lateral connecting seat (10) via a rotating shaft on one side, an arc-shaped external clamping piece (92) fixedly mounted on two side walls of the flip knife gate (91), an external extrusion frame (93) sleeved on the outside of the flip knife gate (91), and a transverse limit shaft (94) mounted inside the external extrusion frame (93).

5. The elastic closing knife switch applied to the primary and secondary deep fusion circuit breaker according to claim 4 is characterized in that: The flip gate blade (91) and the arc-shaped external clamping piece (92) are provided with a longitudinal adjustment opening (95) that matches the transverse limit axis (94).

6. The elastic closing knife switch applied to the primary and secondary deep fusion circuit breaker according to claim 4 is characterized in that: A first lateral connecting plate (14) is fixedly mounted on the top of the first column (2), and a second lateral connecting plate (15) matching with the arc-shaped external clamping plate (92) is fixedly mounted on the top of the second column (3).

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