Isolating switch

Abstract

The utility model discloses an isolating switch, which comprises a frame, the frame comprises two side plates, a front plate and a bottom plate, the front plate and the bottom plate are arranged between the two side plates, the upper part of the frame is provided with an upper static knife holder, the front plate is provided with a grounding knife holder, and the bottom plate is provided with an insulating seat. A movable blade used for being matched with the upper static knife holder and the grounding knife holder is hinged to the insulating seat, an operation shaft is further rotationally connected to the frame, a crank arm is installed on the operation shaft in a linkage mode, and the crank arm is connected with the movable blade through a transmission piece and used for driving the movable blade to swing. The two ends of the front plate are respectively welded with the two side plates, and the two ends of the bottom plate are respectively welded with the two side plates. The device is higher in structural strength, more reliable in performance and capable of better carrying out dynamic thermal stability tests and closing tests.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of switch, including environmental protection switch and sulfur hexafluoride switch, especially a kind of disconnecting switch with high inspection standard. BACKGROUND

[0002] Currently, the disconnecting switch on the market usually includes frame, the frame is by two side plates and the front plate and bottom plate set between two side plates, upper static seat is installed on the frame upper part, ground knife holder is installed on the front plate, insulating seat is installed on the bottom plate, and the dynamic blade for cooperating with upper static seat and ground knife holder is hinged on the insulating seat, operating shaft is rotatably connected on the frame, and crank arm is connected with operating shaft; dynamic blade is connected with dynamic blade by transmission member. Since the structure strength is not high, stability is poor during dynamic and thermal stability test, for example: since the frame structure adopts assembly type (clamping or fastener connection) structure, the strength is not high, and deformation is prone to occur during dynamic and thermal stability test. Therefore, it is necessary to improve the existing disconnecting switch so that it can better perform dynamic and thermal stability test. SUMMARY

[0003] The utility model discloses a kind of disconnecting switches, the utility model structure strength is higher, performance is more reliable, can better carry out dynamic, thermal stability test and closing test.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of disconnecting switch, including frame, the frame includes two side plates and the front plate and bottom plate set between two side plates, upper static seat is installed on the frame upper part, ground knife holder is installed on the front plate, insulating seat is installed on the bottom plate, and the dynamic blade for cooperating with upper static seat and ground knife holder is hinged on the insulating seat, operating shaft is rotatably connected on the frame, and crank arm is connected with operating shaft; dynamic blade is connected with dynamic blade by transmission member for driving dynamic blade swing;The both ends of the front plate are welded together with the both ends of the two side plates respectively, and the both ends of the bottom plate are also welded together with the both ends of the two side plates respectively.

[0005] By adopting the above technical scheme, frame adopts full-welded structure, and the both ends of the front plate and the bottom plate are welded on the corresponding side plate, relative to the frame structure of traditional assembly type, it has the advantages that structure strength is higher, and it is not easy to deform, can better carry out dynamic and thermal stability test and closing test.

[0006] The utility model further sets up, the both ends of the front plate are equipped with first positioning protrusion respectively, and the side plate is equipped with the first positioning hole that is in accord with the first positioning protrusion;The both ends of the bottom plate are equipped with second positioning protrusion respectively, and the side plate is equipped with the second positioning hole that is in accord with the second positioning protrusion.

[0007] By adopting the technical scheme, positioning assembly is facilitated, welding is performed after clamping, the connection structure is higher in strength and better in firmness.

[0008] The utility model further sets up, be provided with reinforcing bending on the front board or / and bottom plate.

[0009] By adopting the technical scheme, the strength of the front plate and the bottom plate can be further improved, so that deformation is less likely to occur during dynamic thermal stability test and closing test.

[0010] The utility model further sets up, the frame still includes at least one reinforcing rod or reinforcing rib, both ends of the reinforcing rod or reinforcing rib are welded on two side plates respectively.

[0011] By adopting the technical scheme, the reinforcing rod or the reinforcing rib added to the frame can further improve the strength of the overall structure of the frame.

[0012] The utility model further sets up, the transmission part is made of high-temperature resistant material.

[0013] By adopting the technical scheme, since the temperature of the switch copper piece is very high during dynamic thermal test, the transmission part made of high-temperature resistant material is less likely to deform during the test.

[0014] The utility model further sets up, the arc leading end of the moving blade is provided with a thickened layer.

[0015] By adopting the technical scheme, the thickened head can increase the contact area, and the current-carrying area of the contact end of the copper piece can be improved, the heat dissipation capacity is increased, local overheating is prevented, and the performance is more stable.

[0016] The utility model further sets up, the side of the thickened layer is provided with at least two conductive protrusions for cooperating with the upper static blade seat and the grounding blade seat.

[0017] By adopting the technical scheme, compared with the structure that one conductive protrusion is arranged on the market, at least two conductive protrusions are arranged, the contact position is ensured to be in contact, and the contact surface can be completely contacted after wear.

[0018] The utility model further sets up, the arc leading end of the moving blade and / or the upper end of the grounding blade seat is provided with a burn-resistant layer.

[0019] By adopting the technical scheme, the arc leading end can be prevented from sticking due to high temperature caused by arc drawing when the moving blade is closed, so that the situation that the moving blade cannot be smoothly opened is avoided; or the arc leading end and the conductive protrusion can be prevented from being burned due to arc drawing when the moving blade is closed / opened.

[0020] The utility model further sets up, the arc leading end of dynamic blade and / or the burnout resistance layer on the ground electrode holder is consolidated through setting fastener.

[0021] Through adopting above-mentioned technical scheme, can further promote the firmness that burnout resistance layer and dynamic blade arc leading end cooperate.

[0022] The utility model further sets up, the ground electrode holder is installed in the side of front plate near dynamic blade in vertical type, and the ground electrode holder bottom is equipped with the limiting flange for constituting the limit to dynamic blade.

[0023] Through adopting above-mentioned technical scheme, the ground electrode holder adopts vertical type installation mode, and the impact force that frame receives is smaller, can guarantee that frame is not easy to deform and damage in the process of testing. ACCURACY OF DRAWINGS

[0024] Figure 1 It is the whole structure schematic diagram of the utility model;

[0025] Figure 2 It is the structure schematic diagram of the utility model frame;

[0026] Figure 3 It is the first visual angle structure schematic diagram of the utility model dynamic blade;

[0027] Figure 4 It is the second visual angle structure schematic diagram of the utility model dynamic blade;

[0028] Figure 5 It is the cooperation structure schematic diagram of the utility model dynamic blade and ground electrode holder.

[0029] In the drawing: 1, frame;2, side plate;3, front plate;4, bottom plate;5, upper static blade holder;6, ground electrode holder;7, insulating seat;8, dynamic blade;9, operating shaft;10, crank arm;11, transmission part;12, first positioning protrusion;13, first positioning hole;14, second positioning protrusion;15, second positioning hole;16, reinforcing bending;17, reinforcing rod;18, thickening layer;19, conductive protrusion;20, burnout resistance layer;21, fastener;22, limiting flange. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0031] Embodiment: as attached Figures 1-5The isolation switch shown, including frame 1, the frame 1 includes two side plates 2 and set between the two side plates 2 front plate 3 and bottom plate 4, two side plates 2 parallel arrangement, the frame 1 upper installation of the upper static knife seat 5, the front plate 3 on the installation of the grounding knife seat 6, the bottom plate 4 on the installation of the insulation seat 7, the insulation seat 7 on the hinge for the upper static knife seat 5 and the grounding knife seat 6 cooperation of the moving blade 8, frame 1 also rotatingly connected with the operating shaft 9, operating shaft 9 on the linkage installation of the crank arm 10, crank arm 10 through the transmission member 11 and the moving blade 8 is connected for driving the moving blade 8 swing; The front plate 3 both ends are welded together with the two side plates 2, and the bottom plate 4 both ends are also welded together with the two side plates 2. Frame 1 adopts full welding structure, the front plate 3 and the bottom plate 4 both ends are welded in the corresponding side plate 2, relative to the traditional assembled frame 1 structure, it has the advantages of higher structural strength, not easy to deform, can better carry out dynamic, thermal stability test and closing test.

[0032] As shown in the accompanying drawings Figure 2 The front plate 3 both ends are respectively provided with the first positioning convex 12, the side plate 2 is provided with the first positioning hole 13 matched with the first positioning convex 12; The bottom plate 4 both ends are respectively provided with the second positioning convex 14, the side plate 2 is provided with the second positioning hole 15 matched with the second positioning convex 14. This design not only facilitates positioning assembly, but also after clamping welding, the connection structure has higher strength and better firmness.

[0033] As shown in the accompanying drawings Figure 2 The front plate 3 or / and bottom plate 4 is provided with a reinforcing bending 16. This design can further improve the strength of the front plate 3 and the bottom plate 4, so that it is not easy to deform during dynamic, thermal stability test and closing test.

[0034] As shown in the accompanying drawings Figure 2 The frame 1 further includes at least one reinforcing rod 17, which can be round steel or reinforcing rib, and the two ends of the reinforcing rod 17 are respectively welded on the two side plates 2. The reinforcing rod 17 or reinforcing rib is added to the frame 1, which can further improve the strength of the overall structure of the frame 1.

[0035] Among them, the transmission member 11 is made of high temperature resistant material, such as vacuum impregnated epoxy glass cloth plate. Because the temperature of the switch copper piece is very high during dynamic and thermal test, the transmission member 11 made of high temperature resistant material is not easy to deform during test.

[0036] As shown in the accompanying drawings Figure 3 And the accompanying drawings Figure 4As shown, the arc leading end (head end) of the moving blade 8 is provided with a thickened layer 18, and the arc leading end of the moving blade 8 can be silver plated. The head thickening can increase the contact area, and can also increase the current carrying area of the copper contact end, increase the heat dissipation capacity, prevent local overheating, and the performance is more stable.

[0037] As shown in the accompanying drawings Figure 3 and the accompanying drawings Figure 4 As shown, the side of the thickened layer 18 is provided with at least two conductive protrusions 19 (jogging points) for cooperating with the upper static blade seat 5 and the grounding blade seat 6. In this embodiment, two conductive protrusions 19 are used. Compared with the structure in which only one conductive protrusion 19 is provided on the market, the provision of at least two conductive protrusions 19 ensures that the contact position is in contact, and even after the contact surface is worn, it can still be completely in contact.

[0038] As shown in the accompanying drawings Figure 3 and the accompanying drawings Figure 4 As shown, the arc leading end of the moving blade 8 and / or the upper end of the grounding blade seat 6 is provided with a burn-resistant layer 20, which can be made of copper-tungsten alloy material (the burn-resistant layer 20 material includes but is not limited to copper-tungsten alloy material). In this embodiment, the burn-resistant layer 20 is coated on the arc leading end of the moving blade 8. This design can prevent the arc leading end of the moving blade 8 from sticking (even burning) due to high temperature caused by arc during closing, resulting in the situation that the switch cannot be successfully opened; or the arc leading end is burned or the conductive protrusion is burned due to the arc phenomenon during closing / opening.

[0039] As shown in the accompanying drawings Figure 3 and the accompanying drawings Figure 4 As shown, the burn-resistant layer 20 on the arc leading end of the moving blade 8 and / or the grounding blade seat 6 is reinforced by a fastener 21 (such as a pin or a screw). This design can further improve the firmness of the burn-resistant layer 20 cooperating with the arc leading end of the moving blade 8.

[0040] As shown in the accompanying drawings Figure 5 As shown, the grounding blade seat 6 is installed vertically on one side of the front plate 3 close to the moving blade 8, and the bottom end of the grounding blade seat 6 is provided with a limiting flange 22 for limiting the moving blade 8. The grounding blade seat 6 is installed in a vertical manner, so that the impact force on the frame 1 is smaller, and the frame 1 can be prevented from being deformed and damaged during the test.

Claims

1. A disconnecting switch, comprising a frame (1), the frame (1) comprising two side plates (2) and a front plate (3) and a bottom plate (4) disposed between the two side plates (2), an upper stationary knife seat (5) mounted on the upper part of the frame (1), a grounding knife seat (6) mounted on the front plate (3), an insulating seat (7) mounted on the bottom plate (4), a movable blade (8) hinged on the insulating seat (7) for cooperating with the upper stationary knife seat (5) and the grounding knife seat (6), an operating shaft (9) rotatably connected to the frame (1), a crank arm (10) linkedly mounted on the operating shaft (9), the crank arm (10) being connected to the movable blade (8) via a transmission member (11) for driving the movable blade (8) to swing; characterized in that: The front plate (3) is welded to the two side plates (2) at two ends, and the bottom plate (4) is also welded to the two side plates (2) at two ends.

2. The disconnector according to claim 1, characterized in that The front plate (3) is provided with a first positioning protrusion (12) at each end, and the side plate (2) is provided with a first positioning hole (13) matching the first positioning protrusion (12); the bottom plate (4) is provided with a second positioning protrusion (14) at each end, and the side plate (2) is provided with a second positioning hole (15) matching the second positioning protrusion (14).

3. A disconnector according to claim 1 or 2, characterised in that: The front plate (3) or / and the bottom plate (4) is provided with a reinforcing bending (16).

4. The disconnector according to claim 1, characterized in that: The frame (1) further comprises at least one reinforcing rod (17), and the two ends of the reinforcing rod (17) are welded to the two side plates (2) respectively.

5. An isolating switch according to claim 1, characterized in that: The transmission member (11) is made of high-temperature-resistant material.

6. An isolating switch according to claim 1, characterized in that: The arc leading end of the moving blade (8) is provided with a thickened layer (18).

7. An isolating switch according to claim 6, characterised in that: The side of the thickened layer (18) is provided with at least two conductive protrusions (19) for cooperating with the upper static blade seat (5) and the grounding blade seat (6).

8. An isolating switch according to claim 1, characterized in that: The arc leading end of the moving blade (8) and / or the upper end of the grounding blade seat (6) is provided with a burn-resistant layer (20).

9. An isolating switch according to claim 8, characterised in that: The burn-resistant layer (20) on the arc leading end of the moving blade (8) and / or the grounding blade seat (6) is reinforced by a fastener (21).

10. The disconnector according to claim 1, characterized in that: The grounding blade seat (6) is installed vertically on the side of the front plate (3) close to the moving blade (8), and the bottom end of the grounding blade seat (6) is provided with a limiting flange (22) for limiting the moving blade (8).

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