An isolating switch with equipotential structure

Abstract

The present invention provides an isolating switch with an equipotential structure, comprising an outer shell, an inlet terminal, a moving contact assembly connected to the inlet terminal, an outlet terminal and a stationary contact assembly connected to the outlet terminal are arranged in the outer shell; a first action terminal connected to the inlet terminal and having the same potential as the moving contact of the moving contact assembly is also formed in the outer shell; the stationary contact assembly has a second action terminal having the same potential as the stationary contact of the stationary contact assembly; the first action terminal and the second action terminal correspond to each other and are arranged at a certain interval, and the interval between the first action terminal and the second action terminal is smaller than the distance between the moving contact and the stationary contact when the moving contact assembly completes the opening; an arc extinguishing device is arranged between the first action terminal and the second action terminal. When the moving contact and the stationary contact are completely disconnected, the arc will transfer from the position between the moving contact and the stationary contact to the position between the first action terminal and the second action terminal, and will be extinguished by the arc extinguishing device at the same time, thereby achieving the purpose of protecting the contacts and other devices.

Description

Technical Field

[0001] The present invention relates to the field of electrical switches, in particular to the field of isolating switches; more particularly, to an isolating switch with an equipotential structure. Background Art

[0002] Isolating switch is a widely used electrical appliance in switchgear, which plays an isolating role in the circuit. Isolating switch is mainly composed of insulating part, conductive part, supporting base or frame, closing mechanism and operating mechanism (drive module). Among them, the operating mechanism is used to control the closing, opening and testing status of the isolating switch. The closing mechanism receives the torque of the operating mechanism and transmits the motion to the moving contact to complete the opening and closing actions of the isolating switch.

[0003] In order to make the disconnector have arc extinguishing capability, an arc extinguishing device is installed near the static contact. However, the arc extinguishing capability of such a simple addition of an arc extinguishing device is average, and it is difficult to break through the bottleneck and achieve a significant improvement. Summary of the invention

[0004] To this end, the present invention provides an isolating switch with an equipotential structure, which transfers the arc generated by the opening of the switch through the equipotential structure and then performs centralized arc extinguishing, thereby greatly improving the arc extinguishing capability.

[0005] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0006] A disconnector with an equipotential structure comprises an outer shell, in which an incoming line terminal, a moving contact assembly connected to the incoming line terminal, an outgoing line terminal and a stationary contact assembly connected to the outgoing line terminal are arranged; a first action terminal connected to the incoming line terminal and having the same potential as the moving contact of the moving contact assembly is also formed in the outer shell; the stationary contact assembly has a second action terminal having the same potential as the stationary contact of the stationary contact assembly; the first action terminal and the second action terminal correspond to each other and are arranged at a certain interval, and the interval between the first action terminal and the second action terminal is smaller than the distance between the moving contact and the stationary contact when the moving contact assembly completes opening; an arc extinguishing device is arranged between the first action terminal and the second action terminal.

[0007] Furthermore, the position where the moving contact and the static contact perform opening and closing actions is defined as the opening and closing action position, and the position between the first action end and the second action end is defined as the arc extinguishing position. An air flow channel is also formed in the outer shell, and the opening and closing action position and the arc extinguishing position are both located in the air flow channel, and the arc extinguishing position is located downstream of the opening and closing action position.

[0008] Furthermore, the arc extinguishing position is located below the opening and closing action position, and an air outlet is provided at the bottom of the outer shell.

[0009] Furthermore, the moving contact assembly is located above the stationary contact assembly, and the second acting end extends from top to bottom.

[0010] Furthermore, the stationary contact assembly comprises a stationary contact bracket and a stationary contact arranged on the stationary contact bracket, and the second acting end is formed by extending downward from the stationary contact bracket.

[0011] Furthermore, the first action end and the second action end are both straight sections and are arranged in parallel.

[0012] Furthermore, a conductive plate connected to the incoming line end is provided in the outer shell, and the first active end is formed on the conductive plate.

[0013] Furthermore, the conductive plate has a "U"-shaped structure, having a middle arc section located in the middle position and a first end and a second end located at both ends. The middle arc section of the conductive plate is fixed in the outer shell, and its first end is connected to the incoming line end, and the second end forms a first acting end with the same potential as the moving contact of the moving contact assembly. The U-shaped cavity of the conductive plate is used to make way for the layout of the moving contact assembly.

[0014] Furthermore, it also includes an incoming line connection plate, which is directly connected to the incoming line end; the moving contact assembly and the conductive plate are both connected to the incoming line connection plate, thereby indirectly connecting to the incoming line end.

[0015] Furthermore, the arc extinguishing device is an arc extinguishing grid.

[0016] The technical solution provided by the present invention has the following beneficial effects:

[0017] A first acting end with the same potential as the moving contact of the moving contact assembly and a second acting end with the same potential as the static contact of the static contact assembly are added. When the switch is disconnected under load (i.e., when the switch is opened), an arc is generated between the moving contact and the static contact. When the moving contact and the static contact are completely disconnected, due to the close proximity between the first acting end and the second acting end, the arc will be transferred from the position between the moving contact and the static contact to the position between the first acting end and the second acting end, and will be extinguished by the arc extinguishing device at the same time, thereby achieving the purpose of protecting the contacts and other devices; the arc extinguishing ability is greatly improved; and the structure is simple, especially it can be well applied to small isolating switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure shows a front view of a hidden front housing of an isolating switch with an equipotential structure in an embodiment;

[0019] Figure 2 Shown Figure 1 Schematic diagram of the structure;

[0020] Figure 3The figure shows a schematic diagram of the structural decomposition of the isolating switch with equipotential structure in the embodiment at a three-dimensional angle;

[0021] Figure 4 Shown Figure 1 Schematic diagram of the structural breakdown of the structure;

[0022] Figure 5 The figure shows a schematic diagram of the exploded structure of the isolating switch with equipotential structure in the embodiment from a top view;

[0023] Figure 6 The figure shows the internal structure of the isolating switch with equipotential structure in the embodiment. Figure 1 ;

[0024] Figure 7 Shown Figure 6 A schematic diagram of the structure at another angle;

[0025] Figure 8 The figure shows the internal structure of the isolating switch with equipotential structure in the embodiment. Figure 2 ;

[0026] Fig. 9 Shown is a schematic structural diagram of a conductive plate in an embodiment;

[0027] Fig.10 Shown is a schematic structural diagram of a stationary contact assembly in an embodiment;

[0028] Fig.11 Shown is a schematic structural diagram of the incoming line connection plate in the embodiment. DETAILED DESCRIPTION

[0029] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0030] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0031] Reference Figures 1 to 11As shown, this embodiment provides an isolating switch with an equipotential structure, including an outer shell 10, in which an incoming line terminal (not shown), a moving contact assembly 20 connected to the incoming line terminal, an outgoing line terminal (not shown) and a stationary contact assembly 30 connected to the outgoing line terminal are arranged; specifically, the outer shell 10 includes a front shell 11 and a rear shell 12, and the front shell 11 and the rear shell 12 are covered to form an installation cavity, and the incoming line terminal, the moving contact assembly 20 connected to the incoming line terminal, the outgoing line terminal and the stationary contact assembly 30 connected to the outgoing line terminal are all assembled in the installation cavity.

[0032] The moving contact assembly 20 performs opening and closing actions under the drive of the operating mechanism. Specifically, the moving contact assembly 20 adopts a structure in the prior art. For example, in this embodiment, a structure that can achieve rapid closing in the prior art is adopted, and its specific composition structure and operation actions are not described in detail here. Of course, in other embodiments, the structure of the moving contact assembly is not limited to this.

[0033] A first acting end 41 connected to the incoming line end and having the same potential as the moving contact 21 of the moving contact assembly 20 is also formed in the outer shell 10; the static contact assembly 30 has a second acting end 33 having the same potential as the static contact 32 of the static contact assembly 30; the first acting end 41 and the second acting end 33 correspond to each other and are arranged at a certain interval, and the interval between the first acting end 41 and the second acting end 33 is smaller than the distance between the moving contact 21 and the static contact 32 when the moving contact assembly 20 completes the opening; an arc extinguishing device 50 is arranged between the first acting end 41 and the second acting end 33. Specifically, in the present embodiment, the arc extinguishing device 50 is an arc extinguishing grid, but of course, it is not limited to the arc extinguishing grid.

[0034] When the switch is disconnected under load (i.e., when the switch is opened), an arc is generated between the moving contact 21 and the stationary contact 32. When the moving contact 21 and the stationary contact 32 are completely disconnected, due to the close proximity between the first action end 41 and the second action end 33, the arc will be generated between the moving contact 21 and the stationary contact 32 (such as Figure 1 Position A) in the middle is transferred to a position between the first action end 41 and the second action end 33, and is extinguished by the arc extinguishing device 50 at the same time, thereby achieving the purpose of protecting the contacts and other devices; the arc extinguishing ability is greatly improved; and the structure is simple, especially it can be well applied to small isolating switches.

[0035] Furthermore, the implementation structure of the first action end 41 is as follows: an incoming line connection plate 61 and a conductive plate 40 are provided in the outer shell 10; the incoming line connection plate 61 is connected to the incoming line end; the moving contact assembly 20 and the conductive plate 40 are both connected to the incoming line connection plate 61 to implement the introduction of current from the incoming line end. Specifically, the conductive plate 40 is in a "U"-shaped structure, having a middle arc section located in the middle position and a first end and a second end located at both ends. The middle arc section of the conductive plate 40 is fixed in the outer shell 10, and its first end is connected to the incoming line end. In this specific embodiment, it is directly connected to the incoming line connection plate 61, and the second end forms the first action end 41 with the same potential as the moving contact 21 of the moving contact assembly 20. The first action end 41 is simple to implement, and the U-shaped cavity of the conductive plate 40 is used to make way for the layout of the spring 22 of the moving contact assembly 20, and the structure is compact.

[0036] Of course, in other embodiments, the molding structure of the first acting end 41 is not limited thereto. For example, the first acting end 41 may also be directly an independent plate-like structure, and then connected to the incoming line connection plate 61 through a wire; or the incoming line connection plate 61 is not provided, and the moving contact assembly 20 and the first acting end 41 are directly connected to the incoming line end through a wire, and so on.

[0037] Furthermore, the first action end 41 and the second action end 33 are both straight sections. In this embodiment, the first action end 41 and the second action end 33 are substantially parallel to each other. The substantially parallel arrangement includes the first action end 41 and the second action end 33 being parallel to each other, and allowing the first action end 41 and the second action end 33 to deviate slightly from each other on the basis of being parallel to each other, such as within 10 degrees.

[0038] Specifically, in order to further improve the arc extinguishing capability, in this embodiment, the position where the moving contact 21 and the static contact 32 perform the opening and closing action is defined as the opening and closing action position A, and the position between the first action end 41 and the second action end 33 is defined as the arc extinguishing position B, and the arc extinguishing device 50 is located at the arc extinguishing position B, and the outer shell 10 is also formed with an air flow channel (such as Figure 1 As shown in the airflow arrow 1), the opening and closing action position A and the arc extinguishing position B are both located in the airflow channel, and the arc extinguishing position B is located downstream of the opening and closing action position A, that is, the airflow in the airflow channel will first pass through the opening and closing action position A, and then pass through the arc extinguishing position B. Driven by the airflow, the arc generated by the opening of the moving contact 21 and the static contact 32 can jump to the arc extinguishing position B more quickly, thereby extinguishing the arc of the arc extinguishing device 50 more quickly and more comprehensively.

[0039] In this specific embodiment, the layout structure is as follows: Figure 1As shown, the arc extinguishing position B is located below the opening and closing action position A, specifically at the lower left position. More specifically, the moving contact assembly 20 is located above the static contact assembly 30. The static contact assembly 30 includes a static contact bracket 31 and a static contact 32 arranged on the static contact bracket 31. The second action end 33 is formed by the static contact bracket 31 extending downward. An air outlet (not shown) is provided at the bottom of the outer shell 10. The right side of the opening and closing action position A is closed, and the airflow can only flow to the left to the arc extinguishing position B, and then flow downward from the arc extinguishing position B until it is blown out from the air outlet; the structure is compact, reasonable, and simple to implement. Of course, in other embodiments, the flow direction of the airflow channel is not limited to this, and can be determined according to the distribution of the opening and closing action position A and the arc extinguishing position B, such as from bottom to top, from left to right, etc. The structure of the static contact assembly 30 and the way to form the second action end 33 are not limited to this.

[0040] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. An isolating switch with an equipotential structure, comprising an outer shell, in which an inlet terminal, a moving contact assembly connected to the inlet terminal, an outlet terminal and a stationary contact assembly connected to the outlet terminal are arranged; characterized in that: A first acting end connected to the incoming line end and having the same potential as the moving contact of the moving contact assembly is also formed in the outer shell; the static contact assembly has a second acting end having the same potential as the static contact of the static contact assembly; the first acting end and the second acting end correspond to each other and are arranged at a certain distance, and the distance between the first acting end and the second acting end is smaller than the distance between the moving contact and the static contact when the moving contact assembly completes the opening; an arc extinguishing device is arranged between the first acting end and the second acting end; when the switch is disconnected under load, an arc is generated between the moving contact and the static contact, and when the moving contact and the static contact are completely disconnected, since the distance between the first acting end and the second acting end is smaller than the distance between the moving contact and the static contact when the moving contact assembly completes the opening, the arc will be transferred from the position between the moving contact and the static contact to the position between the first acting end and the second acting end, and will be extinguished by the arc extinguishing device at the same time.

2. The isolating switch of the equipotential structure according to claim 1, characterized in that: The position where the moving contact and the static contact perform opening and closing actions is defined as the opening and closing action position, and the position between the first action end and the second action end is defined as the arc extinguishing position. An air flow channel is also formed in the outer shell, and the opening and closing action position and the arc extinguishing position are both located in the air flow channel, and the arc extinguishing position is located downstream of the opening and closing action position.

3. The isolating switch of the equipotential structure according to claim 2, characterized in that: The arc extinguishing position is located below the opening and closing action position, and an air outlet is provided at the bottom of the outer shell.

4. The isolating switch of the equipotential structure according to claim 3, characterized in that: The moving contact assembly is located above the stationary contact assembly, and the second action end extends from top to bottom.

5. The isolating switch of the equipotential structure according to claim 4, characterized in that: The stationary contact assembly comprises a stationary contact support and a stationary contact arranged on the stationary contact support, and the second action end is formed by extending downward from the stationary contact support.

6. The isolating switch of the equipotential structure according to claim 1, characterized in that: The first action end and the second action end are both straight sections and are arranged in parallel.

7. The isolating switch of the equipotential structure according to claim 1, characterized in that: A conductive plate connected to the incoming line end is arranged in the outer shell, and the first active end is formed on the conductive plate.

8. The isolating switch of the equipotential structure according to claim 7, characterized in that: The conductive plate is in a "U"-shaped structure, having a middle arc section located in the middle position and a first end and a second end located at both ends. The middle arc section of the conductive plate is fixed in the outer shell, and its first end is connected to the incoming line end, and the second end forms a first acting end with the same potential as the moving contact of the moving contact assembly. The U-shaped cavity of the conductive plate is used to make way for the layout of the moving contact assembly.

9. The isolating switch of the equipotential structure according to claim 7, characterized in that: It also includes an incoming line connection plate, which is directly connected to the incoming line end; the moving contact assembly and the conductive plate are both connected to the incoming line connection plate, thereby indirectly connecting to the incoming line end.

10. The isolating switch of the equipotential structure according to claim 1, characterized in that: The arc extinguishing device is an arc extinguishing grid.

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