Moving side structure of triplex isolation grounding switch

Abstract

The utility model belongs to the field of high voltage, and discloses a moving side structure of a triplex isolation grounding switch, which reduces the use of spring contact fingers on the premise of realizing good conduction so as to greatly reduce the cost, and comprises a grounding seat, a connecting conductor, a static contact seat, a moving contact rod and a control assembly, the spring contact fingers are embedded in the grounding seat and the static contact seat, and the spring contact fingers are embedded in the moving contact rod. The moving contact rod penetrates through the connecting conductor, a driving rack is arranged on the circumferential surface of the moving contact rod, the control assembly comprises a control shaft rod and a control gear, a conduction entity is formed in the connecting conductor, a conduction through hole is formed in the conduction entity, the moving contact rod penetrates through the conduction through hole in a matched mode, and the control gear is inserted into the conduction through hole and matched with the driving rack in a meshed mode. A watchband contact is embedded in the inner wall of the guide through hole, the watchband contact is provided with an avoiding fracture, and the driving rack is located in the avoiding fracture.

Description

Technical Field

[0001] The utility model belongs to the field of high voltage, and in particular relates to a dynamic side structure of a three-way isolating grounding switch. Background Art

[0002] The three-way isolating grounding switch is a commonly used switch type in GIS, including a grounding seat, a connecting conductor and a static contact seat. It realizes its three working positions: closed position, open position and grounding position by moving the moving contact rod in the connecting conductor.

[0003] At present, in order to ensure good conduction performance, the three-position isolation and grounding switch adopts a solid grounding seat, a connecting conductor and a static contact seat, in which spring contact fingers are embedded, and a spring contact finger is set at each end of the connecting conductor. When the moving contact rod is driven by an external operating structure to move in the connecting conductor, the moving contact rod realizes good conduction in two states of the moving and static ends and the moving and ground ends through the conduction of a spring contact finger in the connecting conductor and the spring contact fingers of the grounding seat and the static contact seat. The Chinese invention patent application: Three-position isolation and grounding switch (publication number: CN102024606A) discloses: finger grooves are set on both sides, and fingers are installed. The isolating switch closing and the grounding switch closing share the moving contact, but the contacts are independent. It reflects the practical application of the current three-position isolation and grounding switch technology.

[0004] However, the drawback of this implementation is that since the grounding seat, connecting conductor and static contact seat are all in solid form and there are many spring contact fingers, it is not only difficult to reduce the cost, but also has a large mass, causing many inconveniences during installation and adjustment. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a dynamic side structure of a three-way isolating grounding switch, which reduces the use of spring contacts while achieving good conduction, thereby significantly reducing costs.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A three-way isolating grounding switch moving side structure is arranged inside a GIS housing, characterized in that it comprises: a grounding seat, a connecting conductor, a static contact seat, a moving contact rod and an operating assembly, the grounding blind hole, the moving contact rod and the static end blind hole are coaxial and sequentially arranged at intervals, the grounding seat has a grounding blind hole, the static contact seat has a static end blind hole, the inner walls of the grounding blind hole and the static end blind hole are both embedded with spring contact fingers, the connecting conductor is hollow and has openings at both ends, the moving contact rod passes through the connecting conductor, and the circumferential surface of the moving contact rod is provided with a driving rack, and the driving rack is connected to the moving contact rod. The contact rods extend in the same direction, and the operating assembly includes an operating shaft and an operating gear. The operating shaft is inserted from the outside of the GIS shell, and the operating gear is sleeved on the operating shaft, wherein a conducting entity is formed in the connecting conductor, and the conducting entity has a conducting through-hole. The moving contact rod fits through the conducting through-hole, and the axis of the conducting through-hole is perpendicular to the axis of the operating gear. The operating gear is inserted into the conducting through-hole and meshes with the driving rack. A strap contact is embedded in the inner wall of the conducting through-hole, and the strap contact has an avoidance break, and the driving rack is located in the avoidance break.

[0008] Preferably, the connecting conductor has two weight-reducing cavities, which are symmetrically formed on opposite sides of the conducting entity, and the weight-reducing cavities are communicated with the conducting through-holes, so that the connecting conductor forms two thin-walled hollow shell structures on both sides of the conducting entity, and the weight-reducing cavities form open through-rod holes on the surface of the connecting conductor, and the moving contact rod passes through the connecting conductor through the two through-rod holes.

[0009] Furthermore, inner guide rings are respectively embedded on the inner walls of the guide through hole at both ends in the extending direction of the hole, and an outer guide ring is embedded on the inner wall of the through rod hole, and both the inner guide ring and the outer guide ring cooperate with the moving contact rod.

[0010] Preferably, a contact embedding groove is provided on the inner wall of the guide through hole, and the watch strap contact is embedded in the contact embedding groove. The envelope curvature of the contact embedding groove is the same as that of the watch strap contact, and both ends of the contact embedding groove are formed with limiting step surfaces extending toward the interior of the entity, and both ends of the watch strap contact are fixed with limiting plates, which are threadedly fixed on the limiting step surfaces.

[0011] Preferably, the manipulation assembly further comprises a fixed base, which is hollow and arranged on the inner wall of the GIS housing, the manipulation gear is arranged inside the fixed base, and the manipulation shaft penetrates into the interior of the fixed base.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Because the dynamic side structure of the three-way isolation grounding switch of the utility model includes a grounding seat, a connecting conductor, a static contact seat, a moving contact rod and an operating assembly, the grounding seat and the static contact seat are both embedded with spring contact fingers, the moving contact rod passes through the connecting conductor, and the circumferential surface of the moving contact rod is provided with a driving rack, the operating assembly includes an operating shaft and an operating gear, a conducting entity is formed in the connecting conductor, the conducting entity has a conducting through hole, the moving contact rod cooperates to pass through the conducting through hole, the operating gear is inserted into the conducting through hole, and meshes with the driving rack, the inner wall of the conducting through hole is embedded with a strap contact, and the strap contact has a avoiding disconnection The driving rack is located in the avoidance fracture, that is, a good conduction between the moving contact rod and the connecting conductor is achieved by setting a non-closed strap contact, and the strap contact is located near the operating rack, that is, no matter how the moving contact rod moves, the strap contact finger can maintain good conduction between the connecting conductor and the moving contact rod, and the moving contact rod and the grounding seat and the static contact seat are also kept in good conduction through the spring contact finger, so that good conduction can be used in both the moving and static ends, and the moving and grounding ends. Therefore, the utility model reduces the use of spring contact fingers while achieving good conduction, thereby significantly reducing the cost.

[0014] 2. Because the connecting conductor of the utility model has two weight-reducing cavities, the two weight-reducing cavities are symmetrically formed on the opposite sides of the conducting entity, and the weight-reducing cavities are communicated with the conducting through holes, so that the connecting conductor forms two thin-walled hollow shell structures on both sides of the conducting entity, and the weight-reducing cavities form open rod holes on the surface of the connecting conductor, and the moving contact rod passes through the connecting conductor through the two rod holes. Since the connecting conductor has only one strap contact finger as a component for conduction, it is only necessary to set a physical structure corresponding to the strap contact finger, that is, the conducting entity, and the remaining connecting conductor parts only need to be set as a thin-walled structure of the cavity to ensure the coaxiality of the moving contact rod. Therefore, the utility model can realize a hollow connecting conductor, thereby further greatly reducing the cost and also greatly reducing the quality of the overall structure.

[0015] 3. Because the utility model has a contact embedding groove on the inner wall of the guide through hole, the watchband contact is embedded in the contact embedding groove, the envelope curvature of the contact embedding groove is the same as that of the watchband contact, and both ends of the contact embedding groove are formed with limiting step surfaces extending toward the inside of the entity, and both ends of the watchband contact are fixed with limiting plates, which are threadedly fixed on the limiting step surfaces. Therefore, the watchband contact is fixed on the limiting step surface, so that the non-closed watchband contact can still ensure the stability of position and conduction during frequent contact and friction with the moving contact rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the implementation of the dynamic side structure of the three-way isolating grounding switch of the embodiment of the utility model;

[0017] Figure 2A schematic diagram of the connection conductor and the control assembly of an embodiment of the utility model;

[0018] Figure 3 It is a partial schematic diagram of the contact embedding groove and the strap contact of the embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the cooperation between the operating assembly and the moving contact rod of an embodiment of the utility model.

[0020] In the figure: 100, dynamic side structure of three-way isolating grounding switch, S, GIS shell, S1, insulating terminal, 10, grounding seat, 11, grounding blind hole, f, spring contact finger, 20, connecting conductor, 20a, weight reduction cavity, 20b, rod hole, 21, conducting entity, 211, conducting through hole, 211a, gear insertion hole, 211b, contact embedding groove, 211c, limiting step surface, 22, strap contact, 23, inner guide ring, 24, outer guide ring, 25, limiting plate, 30, static contact seat, 31, static end blind hole, 40, moving contact rod, 40a, driving rack, 50, operating assembly, 51, fixed base, 52, operating gear, 53, operating shaft. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the dynamic side structure of the three-way isolating grounding switch of the present invention. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation on the present invention.

[0022] like Figure 1 As shown, the dynamic side structure 100 of the triple-function isolating grounding switch in this embodiment is arranged inside the GIS housing S.

[0023] The dynamic side structure 100 of the triplex isolating grounding switch comprises a grounding base 10 , a connecting conductor 20 , a static contact base 30 , a dynamic contact rod 40 and a manipulation assembly 50 .

[0024] The grounding base 10 has a grounding blind hole 11, and the static contact base 30 has a static end blind hole 31. The inner walls of the grounding blind hole 10 and the static end blind hole 30 are both embedded with spring contact fingers f. The grounding blind hole 11, the moving contact rod 40 and the static end blind hole 31 are coaxial and arranged in sequence. The moving contact rod 40 passes through the connecting conductor 20. Specifically, a grounding terminal S1 that is conductive with the grounding base 10 is arranged on the outside of the GIS shell S. The moving contact rod 40 can move along the coaxial square straight line of the grounding blind hole 11, the moving contact rod 40 and the static end blind hole 31 in the connecting conductor 20, so that when the moving contact rod 40 connects the connecting conductor 20 with the grounding base 10 through the spring contact fingers f, the grounding of the mechanism is realized; when the moving contact rod 40 connects the connecting conductor 20 with the static contact base 30 through the spring contact fingers f, the closing of the mechanism is realized, and when the moving contact rod 40 is not in contact with the grounding base 10 and the static contact base 30, the mechanism is opened.

[0025] like Figure 2 and Figure 3 As shown, the connecting conductor 20 is hollow and has two openings at both ends. The connecting conductor 20 has a conducting body 21, a weight-reducing cavity 20a and a rod-through hole 20b.

[0026] The conducting entity 21 has a conducting through hole 211 , and the moving contact rod 40 fits through the conducting through hole 211 .

[0027] There are two weight-reducing cavities 20a, which are symmetrically formed on opposite sides of the conductive entity 21, and the weight-reducing cavities 20a are connected to the conductive through-hole 211, so that the connecting conductor 20 forms two thin-walled hollow shell structures on both sides of the conductive entity 21. Specifically, except for the thicker solid part formed by the conductive entity 21, the rest of the connecting conductor 20 is a thin-walled hollow shell structure.

[0028] The rod holes 20b are weight-reducing cavities 20a formed on the outer surface of the connecting conductor 20. There are two of them. The moving contact rod 40 passes through the connecting conductor 20 through the conducting holes 211 and the two rods 20b.

[0029] In addition, inner guide rings 23 are respectively embedded on the inner walls of the two ends of the guide through hole 211 in the extension direction of the hole, and outer guide rings 24 are embedded on the inner walls of the two through rod holes 20b. The inner guide ring 23 and the outer guide ring 24 are both cooperated with the moving contact rod 40 to enable the moving contact rod 40 to move stably in a straight line direction. In the present embodiment, the material of the inner guide ring 23 and the outer guide ring 24 are both high temperature resistant and good insulating polytetrafluoroethylene.

[0030] A gear insertion hole 211 a , a contact embedding groove 211 b and a limiting step surface 211 c are formed on the inner wall of the guide through hole 211 .

[0031] Specifically, the guide through hole 211 is connected to the inside of the GIS housing S through the gear insertion hole 211 a.

[0032] The contact embedding groove 211b is fitted with a watchband contact 22. The watchband contact 21 has an escape fracture (not shown in the drawings), and the guide hole 211 is located in the escape fracture. Specifically, the contact embedding groove 211b and the watchband contact 21 are both non-closed circles with the same enveloping curvature.

[0033] The limiting step surfaces 211c are located at both ends of the contact embedding groove 211b and extend toward the inside of the conducting entity 21. Specifically, there are two limiting step surfaces 211c, which are respectively located on both sides of the gear insertion hole 211a.

[0034] Both ends of the watchband contact 22 are fixed with limiting pieces 25, and the limiting pieces 25 are threadedly fixed on the limiting step surface 211c, so that the watchband contact 22 is fixed relative to the guide opening 211.

[0035] like Figure 4 As shown, a driving rack 40 a is provided on the circumferential surface of the moving contact rod 40 , and the driving rack 40 a extends in the same direction as the moving contact rod 40 , and the driving rack 40 a is located in the avoidance fracture.

[0036] The manipulation assembly 50 includes a fixed base 51 , a manipulation gear 52 , and a manipulation shaft 53 .

[0037] The fixed base 51 is hollow and is arranged on the inner wall of the GIS shell S. The operating gear 52 is arranged inside the fixed base 51. The operating shaft 53 is inserted from the outside of the GIS shell S and penetrates into the inside of the fixed base 51. The operating gear 52 is sleeved on the operating shaft 53, that is, by applying torque to the operating shaft 53, the operating gear 52 is rotated. In this embodiment, the fixed base 51 is fixed to the inner wall of the GIS shell S through a hollow mounting seat (not shown in the drawings).

[0038] The operating gear 52 is partially inserted into the guide through hole 211 through the gear insertion hole 211a, meshing with the driving rack 40a, and the axis of the operating gear 52 is perpendicular to the axis of the guide through hole 211. Specifically, when the operating gear 52 rotates, the operating gear 52 and the driving rack 40a form a gear rack structure, thereby driving the moving contact rod 40 to move toward the grounding blind hole 11 or the static end blind hole 31.

[0039] The above-mentioned implementation modes are preferred cases of the present utility model and are not used to limit the protection scope of the present utility model. Various deformations or modifications that can be made by ordinary technicians in this field without creative work within the scope of the attached claims are still within the protection scope of this patent.

Claims

1. A three-way isolating grounding switch moving side structure, arranged inside the GIS housing, characterized in that: include: Grounding seat, connecting conductor, static contact seat, moving contact rod and operating components, The grounding seat has a grounding blind hole, the static contact seat has a static end blind hole, the inner walls of the grounding blind hole and the static end blind hole are both embedded with spring contact fingers, the grounding blind hole, the moving contact rod and the static end blind hole are coaxial and sequentially spaced. The connecting conductor is hollow and has two openings at both ends. The moving contact rod passes through the connecting conductor. A driving rack is arranged on the circumference of the moving contact rod. The driving rack extends in the same direction as the moving contact rod. The operating assembly includes an operating shaft and an operating gear. The operating shaft is inserted from the outside of the GIS housing, and the operating gear is sleeved on the operating shaft. Among them, a conducting entity is formed in the connecting conductor, and a conducting through-hole is provided on the conducting entity. The moving contact rod fits through the conducting through-hole, and the axis of the conducting through-hole is perpendicular to the axis of the operating gear. The operating gear is inserted into the conducting through-hole and meshes with the driving rack. A strap contact is embedded in the inner wall of the conducting through-hole, and the strap contact has an avoidance break, and the driving rack is located in the avoidance break.

2. The dynamic side structure of the triple-function isolating grounding switch according to claim 1 is characterized in that: in, The connecting conductor has two weight-reducing cavities, which are symmetrically formed on opposite sides of the conducting entity, and the weight-reducing cavities are communicated with the conducting through-holes, so that the connecting conductor forms two thin-walled hollow shell structures on both sides of the conducting entity, and the weight-reducing cavities both form open rod holes on the surface of the connecting conductor, and the moving contact rod passes through the connecting conductor through the two rod holes.

3. The dynamic side structure of the triple-function isolating grounding switch according to claim 2 is characterized in that: in, Inner guide rings are respectively embedded on the inner walls of both ends of the guide through hole in the extending direction of the hole, and an outer guide ring is embedded on the inner wall of the through rod hole. Both the inner guide ring and the outer guide ring cooperate with the moving contact rod.

4. The dynamic side structure of the triple-function isolating grounding switch according to claim 1 is characterized in that: in, The inner wall of the guide hole is provided with a contact embedding groove, the watchband contact is embedded in the contact embedding groove, the envelope curvature of the contact embedding groove is the same as that of the watchband contact, and both ends of the contact embedding groove are formed with a limiting step surface extending toward the inside of the entity, Both ends of the strap contact are fixed with limiting plates, and the limiting plates are threadedly fixed on the limiting step surface.

5. The dynamic side structure of the triple-function isolating grounding switch according to claim 1 is characterized in that: in, The manipulation assembly further comprises a fixed base, which is hollow and arranged on the inner wall of the GIS housing. The operating gear is arranged inside the fixed base, and the operating shaft penetrates into the inside of the fixed base.

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