Contact assembly and isolating switch

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a contact assembly and an isolating switch, the contact assembly comprises a static contact structure and a moving contact structure driven to rotate, the moving contact structure comprises a main moving contact and an arc moving contact, and the arrangement direction of the main moving contact and the arc moving contact is perpendicular to the rotation plane of the moving contact structure; and when the moving contact structure is switched off, the separation of the moving contact and the static contact structure is earlier than the separation of the arc moving contact and the static contact structure, so that an arc is generated between the arc moving contact and the static contact structure. According to the invention, the arcing distance on the moving contact can be greatly reduced, high-energy ablation on the moving contact assembly at the moment of arcing is avoided, and the temperature of the contact assembly is effectively prevented from being too high.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a contact assembly and an isolating switch. Background Art

[0002] In order to improve the voltage and current breaking control capability in the disconnector, the moving contact is usually composed of a group of contact plates of the same specifications arranged side by side, which extends the distance of the moving contact in the direction perpendicular to the moving plane. Since the moving contact structure of the prior art is consistent with the static contact structure in the moving contact thickness direction when opening, the moving contact structure will arc in the direction perpendicular to the moving plane, so that the arc will burn the moving contact structure for a long distance at the moment of arcing, resulting in a faster temperature rise of the moving contact structure. In the frequent opening and closing control, the temperature of the contact assembly cannot be controlled, resulting in a shorter service life. Therefore, the current disconnectors on the market can only reach DC1500V, which is not suitable for application environments with higher voltages and larger currents. Utility Model Content

[0003] The purpose of the present application is to provide a contact assembly and an isolating switch, which can greatly reduce the arcing distance on the moving contact, avoid high-energy ablation of the moving contact assembly at the moment of arcing, and effectively prevent the temperature of the contact assembly from being too high.

[0004] The embodiment of the present application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application provides a contact assembly, including a static contact structure and a driven rotating moving contact structure, wherein the moving contact structure includes an active contact and an arc moving contact, and the arrangement direction of the active contact and the arc moving contact is perpendicular to the rotation plane of the moving contact structure; when the moving contact structure is opened, the active contact is separated from the static contact structure earlier than the arc moving contact is separated from the static contact structure, so that an arc is generated between the arc moving contact and the static contact structure.

[0006] As an optional embodiment, it also includes an insulating protection part, which includes a first isolation structure arranged on both sides of the rotation plane of the arc-moving contact and used to isolate the active contact from the arc-moving contact. The first isolation structures on both sides are clamped to form a gas-generating arc-extinguishing channel, and the end of the arc-moving contact away from the rotation axis passes through the gas-generating arc-extinguishing channel.

[0007] As an optional embodiment, the first isolation structure includes a first isolation plate and a second isolation plate, the first isolation plates on both sides are parallel and symmetrical about the rotation plane of the arc moving contact, one end of the second isolation plate intersects with the first isolation plate, and the other end extends in a direction away from the gas producing arc extinguishing channel.

[0008] As an optional implementation, a magnetic arc extinguishing member is provided on the first isolation structure.

[0009] As an optional implementation, a second isolation structure is provided at one end of the gas-generating arc-extinguishing channel, and the second isolation structure covers the static contact structure.

[0010] As an optional embodiment, the active contact and / or the arc moving contact is formed by a plurality of moving contact pieces arranged along the arrangement direction; the thickness of the active contact along the arrangement direction is greater than the thickness of the arc moving contact along the arrangement direction.

[0011] As an optional implementation, the active contact is arranged on one side or both sides of the rotation plane of the arc moving contact.

[0012] As an optional implementation, the active contact and the arc moving contact have the same rotation axis.

[0013] As an optional embodiment, the arc moving contact and the active contact are respectively provided with a first abutment portion and a second abutment portion in contact with the static contact structure; the distance from the first abutment portion to the rotation axis is greater than the distance from the second abutment portion to the rotation axis.

[0014] In a second aspect, an embodiment of the present application provides an isolating switch, comprising the above-mentioned contact assembly and an arc extinguishing assembly arranged on one side of the contact assembly, wherein the opening direction formed by the separation of the moving contact structure and the static contact structure is toward the arc extinguishing assembly.

[0015] The beneficial effects of the embodiments of the present application include:

[0016] The embodiment of the present application provides a contact assembly, including a static contact structure and a driven rotating moving contact structure. The moving contact structure of the embodiment of the present application includes an active contact and an arc moving contact whose arrangement direction is perpendicular to the rotating plane of the moving contact structure. When the moving contact structure is opened, the active contact and the arc moving contact are separated and rotated, and the active contact is first separated from the static contact structure, and then the arc moving contact is separated from the static contact structure, so that the opening distance between the active contact and the static contact structure is greater than the opening distance between the arc moving contact and the static contact structure, so that an arc is generated between the arc moving contact and the static contact structure. Therefore, the present application can avoid the generation of an arc on the active contact, effectively shorten the distance of the arc starting of the moving contact structure, and avoid the arc from ablating the moving contact structure with a large amount of energy, thereby preventing the temperature of the contact assembly from being too high, and facilitating cooling and arc extinguishing.

[0017] The embodiment of the present application provides an isolating switch, comprising the above-mentioned contact assembly and an arc extinguishing assembly arranged on one side of the contact assembly, wherein the opening direction formed by the moving contact structure and the static contact structure is toward the arc extinguishing assembly. The embodiment of the present application can prevent the contact assembly from being overheated by arranging the above-mentioned contact assembly, which is conducive to cooling and arc extinguishing, so that the isolating switch is suitable for application environments with high voltage, high current and high breaking frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is one of the structural schematic diagrams of the contact assembly of the embodiment of the present application;

[0020] Figure 2 This is the second structural schematic diagram of the contact assembly of the embodiment of the present application;

[0021] Figure 3 This is the third structural diagram of the contact assembly of the embodiment of the present application;

[0022] Figure 4 This is the fourth structural schematic diagram of the contact assembly of the embodiment of the present application.

[0023] Icons: 100-static contact structure; 101-active contact; 102-arc moving contact; 103-arrangement direction; 104-insulating protection part; 105-first isolation structure; 106-gas arc extinguishing channel; 107-first isolation plate; 108-second isolation plate; 109-second isolation structure; 110-first abutting part; 111-second abutting part; 112-first static contact; 113-second static contact. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In order to improve the voltage and current breaking control capability in the disconnector, the moving contact is usually composed of a group of contact plates of the same specifications arranged side by side, which extends the distance of the moving contact in the direction perpendicular to the moving plane. Since the moving contact structure of the prior art is consistent with the static contact structure in the moving contact thickness direction when the switch is opened 100 degrees, the moving contact structure will arc in the direction perpendicular to the moving plane, so that the arc will burn the moving contact structure for a long distance at the moment of arcing, resulting in a faster temperature rise of the moving contact structure. In the frequent opening and closing control, the temperature of the contact assembly cannot be controlled, resulting in a shorter service life. Therefore, the current disconnectors on the market can only reach DC1500V, which is not suitable for application environments with higher voltages and larger currents.

[0029] In order to solve the above technical problems, an embodiment of the present application provides a contact assembly and an isolating switch.

[0030] Reference Figure 1As shown, an embodiment of the present application provides a contact assembly, including a static contact structure 100 and a driven rotating moving contact structure, the moving contact structure including an active contact 101 and an arc moving contact 102, and an arrangement direction 103 of the active contact 101 and the arc moving contact 102 is perpendicular to the rotation plane of the moving contact structure; the moving contact structure is opened, and the active contact 101 is separated from the static contact structure 100 earlier than the arc moving contact 102 is separated from the static contact structure 100, so that an arc is generated between the arc moving contact 102 and the static contact structure 100.

[0031] It should be noted that the active contact 101 and the arc moving contact 102 of the embodiment of the present application can rotate separately. When the active contact 101 and the arc moving contact 102 are both in contact with the static contact structure 100, the dynamic contact structure is driven to rotate, and the active contact 101 is first separated from the static contact structure 100. At this time, the arc moving contact 102 is still in protective contact with the static contact structure 100. After the active contact 101 rotates a certain distance, the arc is not formed on the active contact 101 and the static contact structure 100, and then the arc moving contact 102 is separated from the static contact structure 100, and an arc is generated on the arc moving contact 102 and the static contact structure 100, so that the arc only ablates the arc moving contact 102, but not the active contact 101.

[0032] Therefore, the implementation of the present application can effectively prevent the temperature of the moving contact structure from being too high, especially in the disconnection control of large current, high voltage and high frequency. The embodiment of the present application provides a contact assembly that can achieve temperature control of the contact assembly during the disconnection operation of large current and high voltage, which is beneficial to the low-temperature arc extinguishing of the contact assembly.

[0033] Compared with the prior art, the contact assembly provided in the embodiment of the present application can avoid excessively rapid heating under the action of the electric arc, and can form better arc extinguishing performance in conjunction with the arc extinguishing assembly, thereby accelerating the arc extinguishing speed, effectively shortening the arc ablation time of the contact assembly, and improving the service life and reliability of the contact assembly.

[0034] The embodiment of the present application provides a contact assembly, including a stationary contact structure 100 and a driven rotating moving contact structure. The moving contact structure of the embodiment of the present application includes an active contact 101 and an arc moving contact 102 whose arrangement direction 103 is perpendicular to the rotating plane of the moving contact structure. When the moving contact structure is opened, the active contact 101 and the arc moving contact 102 are separated and rotated, and the active contact 101 is first separated from the stationary contact structure 100, and the arc moving contact 102 is then separated from the stationary contact structure 100, so that the opening distance between the active contact 101 and the stationary contact structure 100 is greater than the opening distance between the arc moving contact 102 and the stationary contact structure 100, so that an arc is generated between the arc moving contact 102 and the stationary contact structure 100. Therefore, the present application can avoid the generation of an arc on the active contact 101, effectively shorten the arc starting distance of the moving contact structure, and avoid the arc from ablating the moving contact structure with a large amount of energy, thereby preventing the temperature of the contact assembly from being too high, and facilitating the arc extinguishing.

[0035] Reference Figure 1 and Figure 2 As shown, as an optional embodiment, it also includes an insulating protection member 104, which includes a first isolation structure 105 arranged on both sides of the rotation plane of the arc-moving contact 102 and used to isolate the active contact 101 and the arc-moving contact 102. The first isolation structures 105 on both sides are clamped to form a gas-generating arc-extinguishing channel 106, and the end of the arc-moving contact 102 away from the rotation axis passes through the gas-generating arc-extinguishing channel 106.

[0036] The embodiment of the present application adds an insulating protection member 104, which isolates the active contact 101 from the arc-moving contact 102. Its main purpose is to prevent the arc stretched on the arc-moving contact 102 from being transferred to the active contact 101, further ensuring that the active contact 101 has a lower temperature.

[0037] It should be noted that the insulating protection member 104 forms a gas-generating arc-extinguishing channel 106 through the first isolation structure 105 .

[0038] The main body of the first isolation structure 105 may be a gas-generating structural member, or a gas-generating sheet may be attached to the surface of the first isolation structure 105 .

[0039] The entire insulating protection member 104 may also be configured as an integrated gas-generating structural member as required. For this, technicians in this field may make a selection as required, and no special limitation is made here.

[0040] In the embodiment of the present application, the gas-generating arc-extinguishing channel 106 formed by the first isolation structure 105 can be penetrated by the arc-moving contact 102, and the gas-generating arc-extinguishing channel 106 acts on the movement path of the arc-moving contact 102, that is, the rotation path of the arc-moving contact 102 is located in the gas-generating arc-extinguishing channel 106, and both are located on the rotation plane of the arc-moving contact 102.

[0041] When an arc is generated on the arc-moving contact 102, the gas-generating arc-extinguishing channel 106 can generate local high-pressure gas, which can, on the one hand, press the arc to one side of the arc-extinguishing component to prevent the arc from transferring to the opposite direction of the arc-extinguishing component; on the other hand, the high-pressure gas generated by the gas-generating arc-extinguishing channel 106 can blow out the arc, which is beneficial to enhance the arc extinguishing effect.

[0042] Reference Figure 2 As shown, as an optional embodiment, the first isolation structure 105 includes a first isolation plate 107 and a second isolation plate 108, the first isolation plates 107 on both sides are parallel and symmetrical about the rotation plane of the arc-moving contact 102, and one end of the second isolation plate 108 intersects with the first isolation plate 107 and the other end extends in a direction away from the gas-generating arc extinguishing channel 106.

[0043] The first isolation structure 105 of the embodiment of the present application includes a first isolation plate 107 and a second isolation plate 108, wherein the first isolation plate 107 is arranged on both sides of the rotation plane of the arc moving contact 102 and is parallel to each other. The first isolation plate 107 isolating the active contact 101 and the arc moving contact 102, and is sandwiched to form a gas generating arc extinguishing channel 106.

[0044] It should be noted that the first isolation plate 107 and the second isolation plate 108 can be connected to form an L-shaped structure.

[0045] As an optional implementation, a magnetic arc extinguishing member is provided on the first isolation structure 105 .

[0046] Furthermore, in the embodiment of the present application, a magnetic arc extinguishing member is disposed on the first isolation structure 105, and the magnetic arc extinguishing member can enhance the magnetic field and generate electromagnetic force to stretch the arc, so that the arc can be extinguished quickly.

[0047] It should be noted that the magnetic arc extinguishing member can be a strip-shaped permanent magnet, which can be embedded or clamped on the side of the first isolation plate 107. The setting direction of the permanent magnet pole can be set by technicians in this field according to the direction of the electromagnetic force, and is not specifically limited here.

[0048] Reference Figure 1 and Figure 2 As shown, as an optional implementation, a second isolation structure 109 is provided at one end of the gas-generating arc-extinguishing channel 106 , and the second isolation structure 109 covers the stationary contact structure 100 .

[0049] Furthermore, in the embodiment of the present application, a second isolation structure 109 is provided at one end of the gas-generating arc-extinguishing channel 106 , and the second isolation structure 109 is used to isolate and protect the static contact structure 100 .

[0050] Reference Figure 4As shown, it should be noted that the static contact structure 100 has a first static contact 112 that abuts against the active contact 101 and a second static contact 113 that abuts against the arc-moving contact 102. The second isolation structure 109 is provided to isolate the first static contact 112 from the second static contact 113 to prevent the arc on the second static contact 113 from being transferred to the first static contact.

[0051] It should be noted that the second isolation structure 109 does not cover the first static contact and the second static contact 113 to avoid blocking the abutting contact between the moving contact structure and the first static contact and the second static contact.

[0052] Reference Figure 1 and Figure 3 As shown, as an optional embodiment, the active contact 101 and / or the arc moving contact 102 is formed by a plurality of moving contact pieces arranged along an arrangement direction 103; the thickness of the active contact 101 along the arrangement direction 103 is greater than the thickness of the arc moving contact 102 along the arrangement direction 103.

[0053] The active contact 101 and the arc moving contact 102 of the embodiment of the present application can be formed by arranging a plurality of moving contact pieces. Among them, the thickness of the active contact 101 along the arrangement direction 103 is greater than the thickness of the arc moving contact 102 along the arrangement direction 103. The above arrangement facilitates the active contact 101 to carry a larger current and voltage, and allows the arc to be generated on the arc moving contact 102 with a smaller thickness, while enhancing the carrying capacity of the contact assembly, avoiding the problem of excessive temperature of the contact assembly caused by the interruption of high voltage and high current.

[0054] As an optional implementation, the active contact 101 is arranged on one side or both sides of the rotation plane of the arc moving contact 102 .

[0055] It should be noted that there may be two groups of active contacts 101 , and the two groups of active contacts 101 are arranged on both sides of the arcing contact 102 . The two groups of active contacts 101 may be symmetrically arranged about the rotation plane of the arcing contact 102 as needed.

[0056] The active contact 101 and the arc contact 102 have the same rotation axis. In the embodiment of the present application, the active contact 101 and the arc contact 102 have the same rotation axis, so that a driving shaft is provided to connect the active contact 101 and the arc contact 102 in series in a straight line, so as to facilitate drive control.

[0057] Reference Figure 1 and Figure 3As shown, as an optional embodiment, the arc moving contact 102 and the active contact 101 are respectively provided with a first abutting portion 110 and a second abutting portion 111 that contact the static contact structure 100; the distance from the first abutting portion 110 to the rotation axis is greater than the distance from the second abutting portion 111 to the rotation axis.

[0058] In the embodiment of the present application, the distance from the first abutting portion 110 to the rotation axis is greater than the distance from the second abutting portion 111 to the rotation axis, so that the first abutting portion 110 can pass through the gas-generating arc-extinguishing channel 106, and the first isolation structure 105 can also separate the first abutting portion 110 from the second abutting portion 111, thereby effectively preventing arc transfer.

[0059] An embodiment of the present application provides an isolating switch, comprising the above-mentioned contact assembly and an arc extinguishing assembly arranged on one side of the contact assembly, wherein the opening direction formed by the opening of the moving contact structure and the static contact structure 100 is toward the arc extinguishing assembly.

[0060] The embodiment of the present application can prevent the contact assembly from being overheated by providing the above-mentioned contact assembly, which is beneficial to cooling and arc extinguishing, thereby making the isolating switch suitable for application environments with high voltage, high current and high breaking rate.

[0061] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A contact assembly, characterized in that: It includes an insulating protection part, a static contact structure and a driven rotating moving contact structure, the moving contact structure includes an active contact and an arc moving contact, the arrangement direction of the active contact and the arc moving contact is perpendicular to the rotation plane of the moving contact structure; the moving contact structure is opened, the active contact and the static contact structure are separated earlier than the arc moving contact and the static contact structure, so that an arc is generated between the arc moving contact and the static contact structure; the insulating protection part includes a first isolation structure arranged on both sides of the rotation plane of the arc moving contact and used to isolate the active contact from the arc moving contact, the first isolation structures on both sides are clamped to form a gas-generating arc-extinguishing channel, and the end of the arc moving contact away from the rotation axis passes through the gas-generating arc-extinguishing channel.

2. The contact assembly according to claim 1, characterized in that: The first isolation structure includes a first isolation plate and a second isolation plate. The first isolation plates on both sides are parallel and symmetrical about the rotation plane of the arc moving contact. One end of the second isolation plate intersects with the first isolation plate and the other end extends in a direction away from the gas generating arc extinguishing channel.

3. The contact assembly according to claim 1, characterized in that: A magnetic arc extinguishing member is arranged on the first isolation structure.

4. The contact assembly according to claim 1, characterized in that: A second isolation structure is provided at one end of the gas-generating arc-extinguishing channel, and the second isolation structure covers the static contact structure.

5. The contact assembly according to any one of claims 1 to 4, characterized in that: The active contact and / or the arc moving contact is formed by a plurality of moving contact pieces arranged along the arrangement direction; the thickness of the active contact along the arrangement direction is greater than the thickness of the arc moving contact along the arrangement direction.

6. The contact assembly according to any one of claims 1 to 4, characterized in that: The active contact is arranged on one side or both sides of the rotation plane of the arc moving contact.

7. The contact assembly according to any one of claims 1 to 4, characterized in that: The active contact and the arc moving contact have the same rotation axis.

8. The contact assembly according to claim 6, characterized in that: The arc moving contact and the active contact are respectively provided with a first abutting portion and a second abutting portion in contact with the stationary contact structure; the distance from the first abutting portion to the rotation axis is greater than the distance from the second abutting portion to the rotation axis.

9. An isolating switch, characterized in that: It comprises the contact assembly as claimed in any one of claims 1 to 8 and an arc extinguishing assembly arranged on one side of the contact assembly, wherein the opening direction formed by the separation of the moving contact structure and the static contact structure is toward the arc extinguishing assembly.

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