Mounting frame for grounding switch and grounding switch having the same

Abstract

The utility model relates to an installation frame for a grounding switch and a grounding switch having the same. The installation frame comprises: a base; a transmission shaft, which is rotatably mounted to the base and linked with an external operating mechanism; a support frame, one end of which is connected to the transmission shaft and the other end of which is oppositely extended away from the base along a first direction and connected to a moving contact, so that the moving contact can rotate with the transmission shaft via the support frame; a support insulator, one end of which is connected to the base and the other end of which is oppositely extended away from the base along a second direction inclined relative to the first direction and connected to a stationary contact, and the support insulator is arranged on both sides of the transmission shaft with the moving contact in the first direction; wherein the support frame is provided with an insulating layer at least on the entire side facing the stationary contact, and an insulating plate is provided at the end of the support insulator adjacent to the base, and the insulating plate is configured to extend away from the support insulator along the first direction at least to be arranged opposite to the end side of the support frame adjacent to the base in a direction perpendicular to the first direction.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a mounting frame for a grounding switch and a grounding switch having the mounting frame. Background Art

[0002] The grounding switch is a mechanical switch device used to ground the circuit. It can carry a specified abnormal current within a specified time under abnormal circuit conditions, and is not required to carry current under normal circuit conditions, so as to release the static charge of the equipment and circuit under maintenance and ensure the personal safety of the maintenance personnel. At present, with the development of photovoltaic and new energy industry technology, grounding switches, as important equipment in various power systems, are also widely used in high-altitude areas.

[0003] However, due to the decrease in atmospheric pressure and the corresponding decrease in air density and humidity in high-altitude areas, the insulation strength of the grounding switch used in high-altitude areas will be lower than that in non-high-altitude areas. Therefore, in order to ensure the normal operation of the grounding switch and various power systems including it, the grounding switch in the prior art usually adopts the means of increasing the distance between its moving contact and the static contact to improve its insulation performance. However, this will not only affect the mechanical and electrical properties of the grounding switch, but also cause the depth of the grounding switch to deepen, thereby resulting in defects such as a large footprint and high manufacturing and transportation costs.

[0004] Therefore, there is a demand in the art for a grounding switch with better insulation performance and wider applicability. Utility Model Content

[0005] The utility model aims to provide a mounting frame for a grounding switch which can at least solve part of the above problems.

[0006] The utility model also aims to provide a grounding switch using the improved mounting frame.

[0007] According to one aspect of the utility model, a mounting frame for an earthing switch is provided, the mounting frame is used to support a moving contact and a stationary contact of the earthing switch, the mounting frame comprising: a base; a transmission shaft, which is rotatably mounted to the base and linked with an external operating mechanism; a support frame, one end of which is connected to the transmission shaft and the other end of which is opposite to the support frame extends away from the base in a first direction and is connected to the moving contact, so that the moving contact can rotate with the transmission shaft via the support frame; a support insulator, one end of which is connected to the base and the other end of which is opposite to the support frame extends away from the base in a second direction inclined relative to the first direction and is connected to the stationary contact, the support insulator is arranged on both sides of the transmission shaft with the moving contact in the first direction; wherein the support frame is provided with an insulating layer at least on the entire side facing the stationary contact, and an insulating plate is provided at the end of the support insulator adjacent to the base, the insulating plate is configured to extend away from the support insulator in the first direction at least to be arranged opposite to the end side of the support frame adjacent to the base in a direction perpendicular to the first direction.

[0008] Compared with the prior art, the installation frame in the utility model improves the insulation effect of the installation frame by arranging an insulating layer on the entire side of the support frame facing the static contact and arranging an insulating plate on the support insulator that is arranged in parallel with the support frame and does not exceed the support frame in the first direction, based on the arrangement of the support insulator between the moving contact and the static contact, and the insulating layer and the insulating plate are generally arranged in the space surrounded by the moving contact, the static contact and the base, which avoids increasing the distance between the existing moving contact and the static contact and the overall size of the installation frame. Finally, the insulating plate is arranged symmetrically with the end side of the support frame on a plane perpendicular to the first direction, which can also improve the insulation effect while avoiding obstruction to the movement of the moving contact.

[0009] By providing a combined insulating structure including a supporting insulator, an insulating layer and an insulating plate, the discharge risk between the static contact and the moving contact is reduced, the structure is simple and the size of the installation frame is avoided to be increased. In addition,

[0010] Preferably, the first direction and the second direction are substantially coplanar and arranged perpendicularly with respect to each other.

[0011] Preferably, the support frame includes a connecting plate rotatably sleeved on the transmission shaft and a pair of driving plates disposed on both sides of the connecting plate and non-rotatably sleeved on the transmission shaft, wherein the connecting plate extends from the transmission shaft along the first direction beyond the pair of driving plates and its end away from the transmission shaft is connected to the moving contact, and the pair of driving plates are pin-connected to the connecting plate so that the connecting plate is driven by the transmission shaft via the pair of driving plates.

[0012] Preferably, a side surface of each driving plate of the pair of driving plates facing the stationary contact is configured as an inclined surface gradually away from the stationary contact.

[0013] Preferably, the insulating plate extends from the supporting insulator away from the base along a first direction at least to be arranged opposite to each driving plate in the pair of driving plates in a direction perpendicular to the first direction, and an opening is provided at the end of the insulating plate away from the supporting insulator to allow the connecting plate to move to the closing position.

[0014] Preferably, the insulating layer includes a first insulating layer arranged on the entire side of the connecting plate facing the stationary contact and a second insulating layer arranged on the entire side of each driving plate in the pair of driving plates facing the stationary contact.

[0015] Preferably, the base comprises a pair of side panels and a mounting panel connected between the pair of side panels, wherein the transmission shaft extends substantially parallel to the mounting panel and is rotatably connected between the pair of side panels, and the support insulator is mounted on the mounting panel.

[0016] Preferably, the insulating plate is mounted on the supporting insulator and fixed to the mounting panel via a plurality of fasteners, and a portion of each of the plurality of fasteners located on a side of the insulating plate facing the stationary contact is wrapped with an insulating sleeve.

[0017] Preferably, the insulating layer is provided on the entire outer surface of the support frame.

[0018] According to another aspect of the utility model, a grounding switch is provided. The grounding switch comprises the aforementioned mounting frame and a moving contact and a stationary contact supported by the mounting frame.

[0019] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 is a perspective view of an earthing switch including a mounting frame according to the utility model;

[0022] Figure 2 yes Figure 1 A three-dimensional view of the earthing switch with the insulating plate removed;

[0023] Figure 3 yes Figure 1 A perspective view of the earthing switch in FIG.

[0024] Figure 4 yes Figure 1 A side view of the earthing switch in FIG.

[0025] Figure 5 is a three-dimensional diagram of a drive plate of a mounting frame according to the utility model;

[0026] Figure 6 It is a stereoscopic view of a connecting plate of a mounting frame according to the utility model.

[0027] Description of reference numerals:

[0028] 100-earthing switch; 10-mounting frame; 11-base; 111-side panel; 112-mounting panel; 12-transmission shaft; 13-support frame; 131-connecting plate; 132-driving plate; 14-support insulator; 15-insulating layer; 151-first insulating layer; 152-second insulating layer; 16-insulating plate; 161-opening; 171-first supporting rod; 172-second supporting rod; 18-insulating sleeve; 20-moving contact; 30-static contact. DETAILED DESCRIPTION

[0029] Now, with reference to the accompanying drawings, a schematic scheme of the grounding switch and its mounting frame disclosed in the utility model is described in detail. Although the accompanying drawings are provided to present some embodiments of the utility model, the accompanying drawings do not have to be drawn according to the dimensions of the specific implementation scheme, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the utility model. Some components in the accompanying drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the accompanying drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0030] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0031] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0032] The terms "joining", "connection" and the like as used in the present invention include both that two components are indirectly connected together by means of an intermediate layer (such as adhesive, welding agent, etc.) or an intermediate piece (such as a connector, transition piece, etc.), and that two components are directly connected together without the aid of any intermediate layer (such as adhesive, welding agent, etc.) or intermediate piece (such as a connector, transition piece, etc.).

[0033] Figures 1 to 6 The grounding switch 100 of the utility model is shown by way of example, and the grounding switch 100 includes a mounting frame 10 with improved insulation effect and a moving contact 20 and a stationary contact 30 supported by the mounting frame 10, so that the discharge risk of the stationary contact 30 to the moving contact 20 and the mounting frame 10 can be reduced without increasing its overall size and floor space, so that the insulation performance of the mounting switch is enhanced and can be applied to high altitude areas. As shown in the figure, the mounting frame 10 may include a base 11, a transmission shaft 12, a support frame 13 and a support insulator 14.

[0034] The base 11 can be welded or integrally formed of metal materials, and a through hole can be provided thereon to allow the transmission shaft 12 linked to the operating mechanism of the grounding switch 100 to pass therethrough, so that the transmission shaft 12 can be rotatably mounted to the base 11 and can rotate relative to the base 11 following the operating mechanism. The support frame 13 can be mounted to the transmission shaft 12 and extend from the transmission shaft 12 along a first direction away from the base 11, that is, Figures 1 to 4 The support frame 13 extends upward in the page where the middle figure is located, and the end away from the base 11, that is, the upper end thereof, can be connected to the moving contact 20.

[0035] Correspondingly, the support insulator 14 can be mounted to the base 11 and extend away from the base 11 along the second direction, that is, along Figures 1 to 4 The end of the support insulator 14 away from the base 11, that is, the front end, can be connected to the static contact 30. Figures 1 to 4 The second direction and the first direction in the illustrated embodiment are generally arranged on the same plane and are arranged perpendicular to each other. In an embodiment not shown, the second direction and the first direction may be arranged coplanarly, and the angle between the two may be modified accordingly according to actual needs.

[0036] The support insulator 14 can be located on the lower side of the transmission shaft 12 on the base 11 and arranged at intervals relative to the transmission shaft 12. Then, the support insulator 14 and the moving contact 20 are placed on both sides of the transmission shaft 12 in the up-down direction, so that the static contact 30 located at the front end of the support insulator 14 and extending upward from the support insulator 14 can be substantially opposite to the lower end of the support frame 13 in the front-to-back direction, and the moving contact 20 on the upper side of the support frame 13 can be rotated 90 degrees toward the static contact 30 to engage with the static contact 30 during the closing operation. In an embodiment not shown, the distance of the support insulator 14 relative to the transmission shaft 12 and the extension length of the static contact 30 from the support insulator 14 can be adjusted according to actual needs, and it is only necessary to make the two realize the above functions.

[0037] In this way, in Figures 1 to 4 In the open position shown, the operating mechanism of the grounding switch 100 can drive the transmission shaft 12 to rotate in response to the manual closing or electric closing signal, and the transmission shaft 12 drives the support frame 13 thereon and then drives the moving contact 20 on the support frame 13 to rotate toward the static contact 30 until the moving contact 20 engages with the static contact 30 to complete the closing action. When the grounding switch 100 receives the opening signal, the operating mechanism of the grounding switch 100 can also drive the mounting frame 10 and the moving contact 20 thereon to move to the opening position in response to the opening signal. Figures 1 to 4 The open position is shown.

[0038] It should be noted that in order to ensure mechanical performance and movement stability, the base 11, transmission shaft 12 and support frame 13 of the mounting frame 10 are usually made of metal materials, which will cause the static contact 30 connected to the primary main circuit to easily form a discharge point with the above structure even if it is separated from the above structure by the supporting insulator 14, especially in high-altitude application scenarios.

[0039] Therefore, if Figures 1 to 4 The mounting frame 10 shown is provided with an insulating layer 15 on the entire side, i.e., the front side, of the support frame 13 facing the static contact 30, for example, by vulcanization coating or spraying of insulating material, so as to reduce the discharge risk of the support frame 13 to the static contact 30. In an embodiment not shown, the entire outer surface of the support frame 13 may be wrapped with the insulating layer 15. In addition, an insulating plate 16 is provided at the end, i.e., the rear end, of the support insulator 14 adjacent to the base 11, and the insulating plate 16 extends upward from the support insulator 14 to be opposite to the lower end side of the support frame 13 in a direction perpendicular to the up-down direction, i.e., in the front-to-back direction, so as to reduce the discharge risk of the base 11 and the portion of the transmission shaft 12 located between the support insulator 14 and the lower end side of the support frame 13 and the lower end side of the support frame 13 having a sharp point or burr, etc. to the static contact 30.

[0040] Alternatively, if Figures 1 to 3As shown, the support frame 13 may include a connecting plate 131 and a pair of driving plates 132. Figure 6 As shown, a circular hole conforming to the circular cross-section of the transmission shaft 12 is provided at the lower end of the connection plate 131 to allow the transmission shaft 12 extending through the circular hole to rotate relative to the connection plate 131. Figure 5 As shown, a pair of driving plates 132 are respectively disposed on both sides of the connecting plate 131 along the axial direction of the transmission shaft 12, and a special-shaped hole is provided at the lower end of each driving plate 132 to be snapped into the notch of the transmission shaft 12, so that the driving plate 132 can rotate with the transmission shaft 12 when connected to the transmission shaft 12. The upper part of the driving shaft can be pinned to the connecting plate 131, so that the pair of driving plates 132 located on both sides of the connecting plate 131 can stably drive the connecting plate 131, thereby driving the moving contact 20 to move. Among them, the size of the driving plate 132 in the up-down direction is smaller than the size of the connecting plate 131 in the up-down direction. In other words, the connecting plate 131 extends upward from the transmission shaft 12 beyond the driving plate 132, which can reduce the overall size of the support frame 13 while ensuring the stability of power transmission from the transmission shaft 12 to the connecting plate 131 via the driving plate 132.

[0041] Accordingly, the insulating layer 15 may include a first insulating layer 151 and a second insulating layer 152 respectively arranged on the front side of the connecting plate 131 and the front side of the driving plate 132, or a first insulating layer 151 and a second insulating layer 152 respectively covering the connecting plate 131 and the driving plate 132.

[0042] Alternatively, if Figure 5 As shown, a special-shaped hole engaged to the transmission shaft 12 is provided in the substantial middle portion of the driving plate 132, and the front side surface of the driving plate 132 is substantially constructed as an inclined surface extending gradually away from the stationary contact 30 from bottom to top, wherein the front side surface of the driving plate 132 is particularly constructed so that the lower end is substantially aligned with the front side of the connecting plate 131 and the upper end is located on the rear side of the connecting plate 131. This arrangement allows the connecting plate 131 to be completely exposed relative to the driving plate 132 in the front-to-back direction, so as to ensure that the risk of discharge of the stationary contact 30 to the driving plate 132 is reduced through the insulating plate 16 while minimizing the size of the opening 161 of the subsequent insulating plate 16.

[0043] Alternatively, if Figures 1 to 4 As shown, the base 11 may include a pair of side panels 111 arranged relatively spaced apart along the axial direction of the transmission shaft 12 and a mounting panel 112 connected between the front sides of the pair of side panels 111. Each side panel 111 and the mounting panel 112 may be connected by a non-detachable connection method such as welding or a detachable connection method such as bolt connection, so that each side panel 111 and the mounting panel 112 form an integral structure.

[0044] The transmission shaft 12 may be provided with three support frames 13 evenly spaced along the axial direction of the transmission shaft 12, and the three support frames 13 may be provided with three moving contacts 20 corresponding to phase A, phase B and phase C respectively. The connecting plates 131 of each support frame 13 may be connected via a first support rod 171 extending substantially parallel to the transmission shaft 12 to increase structural stability. Further preferably, each moving contact 20 may be connected via a second support rod 172 extending substantially parallel to the transmission shaft 12 to further increase structural stability.

[0045] The mounting panel 112 is arranged substantially parallel to the transmission shaft 12 on the front side of the side panel 111, wherein three support insulators 14 extending from the mounting panel 112 are provided on the front side of the mounting panel 112, and the front end of the support insulator 14 is provided with a static contact 30 extending upward from the mounting panel 112. The three support insulators 14 are arranged opposite to the three moving contacts 20 in the front-to-back direction, respectively, so that the static contact 30 at the front end of each support insulator 14 is arranged opposite to each moving contact 20, respectively, so as to facilitate the engagement and disengagement of the moving contact 20 and the static contact 30 of each phase.

[0046] The insulating plate 16 generally extends upward to be arranged in the front-to-back direction and generally parallel to the transmission shaft 12. The lower end of the insulating plate 16 may be provided with a semi-waist-shaped hole that is respectively conformed to each support insulator 14, so that the insulating plate 16 can be mounted on the support insulator 14. The middle part of the insulating plate 16 may be provided with a smooth round hole or a threaded hole through which each fastener passes, so that the fastener passes therethrough to fix the insulating plate 16 to the mounting panel 112. The head of the fastener extending through the mounting panel 112 and the insulating plate 16 to the front side of the insulating plate 16 may be wrapped with an insulating sleeve 18 to reduce the risk of discharge of the static contact 30 to the head of the fastener.

[0047] When the insulating plate 16 extends upward from the supporting insulator 14 to be opposite to the driving plate 132 in the front-rear direction or further upward, the insulating plate 16 can reduce the risk of the static contact 30 discharging to the driving plate 132, but may hinder the connection plate 131 from Figures 1 to 4 The open position shown moves toward the closed position and blocks the engagement of the moving contact 20 with the stationary contact 30 , so an opening 161 that allows the connecting plate 131 to pass through and move to the closed position may be provided at the upper end of the insulating plate 16 .

[0048] It should be noted that the structures of the moving contact 20 , the stationary contact 30 , and the operating mechanism of the grounding switch 100 of the present invention may adopt those structures well known to those skilled in the art, and therefore will not be described in detail herein.

[0049] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0050] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A mounting frame (10) for an earthing switch (100), the mounting frame (10) being used to support a moving contact (20) and a stationary contact (30) of the earthing switch (100), characterized in that: The mounting frame (10) comprises: Base (11); A transmission shaft (12) rotatably mounted to the base (11) and linked to an external operating mechanism; A support frame (13), one end of which is connected to the transmission shaft (12) and the other end of which extends away from the base (11) in a first direction and is connected to the moving contact (20), so that the moving contact (20) can rotate along the transmission shaft (12) via the support frame (13); a support insulator (14), one end of which is connected to the base (11) and the other end of which extends away from the base (11) along a second direction inclined relative to the first direction and is connected to the stationary contact (30); the support insulator (14) and the moving contact (20) are disposed on both sides of the transmission shaft (12) in the first direction; The support frame (13) is provided with an insulating layer (15) at least on the entire side facing the static contact (30), and the end of the support insulator (14) adjacent to the base (11) is provided with an insulating plate (16), and the insulating plate (16) is configured to extend away from the support insulator (14) along a first direction at least to be arranged opposite to the end side of the support frame (13) adjacent to the base (11) in a direction perpendicular to the first direction.

2. The mounting frame (10) for the earthing switch (100) according to claim 1, characterized in that: The first direction and the second direction are generally coplanar and arranged perpendicularly with respect to each other.

3. The mounting frame (10) for the earthing switch (100) according to claim 1 or 2, characterized in that: The support frame (13) comprises a connecting plate (131) rotatably sleeved on the transmission shaft (12) and a pair of driving plates (132) disposed on both sides of the connecting plate (131) and non-rotatably sleeved on the transmission shaft (12), wherein the connecting plate (131) extends from the transmission shaft (12) along the first direction beyond the pair of driving plates (132) and its end away from the transmission shaft (12) is connected to the moving contact (20), and the pair of driving plates (132) are pin-connected with the connecting plate (131) so that the connecting plate (131) is driven by the transmission shaft (12) via the pair of driving plates (132).

4. The mounting frame (10) for the grounding switch (100) according to claim 3, characterized in that: The side surface of each drive plate (132) in the pair of drive plates (132) facing the stationary contact (30) is configured as an inclined surface gradually moving away from the stationary contact (30).

5. The mounting frame (10) for the earthing switch (100) according to claim 4, characterized in that: The insulating plate (16) extends from the supporting insulator (14) away from the base (11) along a first direction to at least be arranged opposite to each driving plate (132) in the pair of driving plates (132) in a direction perpendicular to the first direction, and an opening (161) is provided at the end of the insulating plate (16) away from the supporting insulator (14) to allow the connecting plate (131) to move to a closing position.

6. The mounting frame (10) for the grounding switch (100) according to claim 3, characterized in that: The insulating layer (15) includes a first insulating layer (151) arranged on the entire side of the connecting plate (131) facing the stationary contact (30) and a second insulating layer (152) arranged on the entire side of each driving plate (132) in the pair of driving plates (132) facing the stationary contact (30).

7. The mounting frame (10) for the grounding switch (100) according to claim 3, characterized in that: The base (11) comprises a pair of side panels (111) and a mounting panel (112) connected between the pair of side panels (111), wherein the transmission shaft (12) is rotatably connected between the pair of side panels (111) and extends substantially parallel to the mounting panel (112), and the support insulator (14) is mounted on the mounting panel (112).

8. The mounting frame (10) for the earthing switch (100) according to claim 7, characterized in that: The insulating plate (16) is mounted on the supporting insulator (14) and fixed to the mounting panel (112) via a plurality of fasteners, wherein a portion of each of the plurality of fasteners located on a side of the insulating plate (16) facing the stationary contact (30) is wrapped with an insulating sleeve (18).

9. The mounting frame (10) for the grounding switch (100) according to claim 1, characterized in that: The insulating layer (15) is provided on the entire outer surface of the support frame (13).

10. A grounding switch (100), characterized in that: The grounding switch (100) comprises a mounting frame (10) according to any one of claims 1 to 9, and a moving contact (20) and a stationary contact (30) supported by the mounting frame (10).

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