Moving contact rod for double-break isolating switch

Abstract

The utility model belongs to the field of GIS, and discloses a moving contact rod used for a double-break disconnecting switch, which can significantly reduce the cost of the moving contact rod, improve the flatness of the surface of a silver coating and greatly reduce the influence of hammering on the whole coaxiality of the moving contact rod, and comprises a conduction cylinder, a driving rod and a driving rack, the conduction cylinder is correspondingly inserted in the guide channel in a matched mode, the circumferential face of the conduction cylinder is in conduction connection with the connecting conductor through the spring contact finger, the driving rod is connected with the end of the conduction cylinder and located in the gear containing sub-cavity, and the driving rack extends in the extending direction of the driving rod and is in pin joint with the surface of the driving rod. And the driving rack and the driving gear in the gear accommodating sub-cavity form a gear rack mechanism, that is, the moving contact rod is realized by assembling the conduction cylinder and the driving rod, so that different materials can be selected, and only the conduction cylinder is made of a copper material, and the driving rod is made of aluminum.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the GIS field, concretely relates to a kind of movable contact rod for double-break disconnecting switch. BACKGROUND

[0002] In GIS, double-break disconnecting switch is a kind of disconnecting switch with two movable contact rods, which has the structure as shown in Figure 1 , movable contact rod has the structure as shown in Figure 2 : the connecting conductor in GIS has gear accommodating inner cavity and two guide channels respectively continuous with the opposite sides of gear, spring contact finger is arranged in guide channel, driving gear that is rotationally coupled with external operating mechanism is arranged in gear accommodating inner cavity, the number of movable contact rod is a pair, movable contact rod continuous conducting portion and driving portion, the section of conducting portion is circular and is insertedly matched in the guide channel, and the outer surface of conducting portion is in contact with spring contact guide, the section of driving portion is inferior arc fan-shaped and extends into gear accommodating inner cavity, the flat surface of driving portion is provided with rack long piece extending along the extension direction of guide channel, and the rack long piece is pinned on driving portion by dowel pin, rack long piece and driving gear form gear rack mechanism, the rack long piece of two movable contact rods is respectively engaged with the opposite sides of driving gear, when driving gear rotates, two movable contact rods respectively extend outward or retract towards opposite sides, to realize the synchronous conduction or disconnection of double-break, and in order to make movable contact rod have better conduction capacity, movable contact rod is made of copper material and outer surface is silver-plated.

[0003] However, the deficiencies of this embodiment are: 1, the price of copper is relatively high, so the cost of movable contact rod made of full copper is relatively high; 2, the overall coaxiality of movable contact rod along the opening and closing direction of disconnecting switch is required to be relatively high, but the movable contact rod along the opening and closing direction of disconnecting switch is not a symmetrical structure, and the processing difficulty of copper is also relatively high, so the manufacturing difficulty of movable contact rod is very high; 3, the existing silver plating process includes rolling silver plating process and ordinary silver plating process, the silver plating layer formed by rolling silver plating process has lower roughness, i.e. the surface is more flat, but since rolling silver plating process is not suitable for silver plating on the surface of non-symmetrical structure, only ordinary silver plating process can be used for movable contact rod, so that the surface roughness is relatively high and affects the conduction performance of disconnecting switch break; 4, when rack long piece is pinned to the surface of driving portion, the means adopted is to realize pinning cooperation of dowel pin by hammering, and the material of copper is relatively soft, so when hammering, the hammering force needs to be strictly limited, and supporting verification process is needed, to ensure that the overall coaxiality of movable contact rod is not affected during hammering process. SUMMARY

[0004] The utility model provides a movable contact rod for double-break disconnecting switch, can significantly reduce movable contact rod's cost, improve its silver layer surface's flatness and greatly reduce the influence of hammering to movable contact rod's overall coaxiality.

[0005] To realize above-mentioned purpose, the utility model provides technical scheme as follows:

[0006] A movable contact rod for double-break disconnecting switch is arranged in the accommodating inner cavity of the connecting conductor of GIS, the accommodating inner cavity has a gear accommodating subcavity and a guide channel continuous with the gear accommodating subcavity, the guide channel is outward open and is internally provided with spring contact fingers, and the movable contact rod is characterized by comprising a lead-through cylinder, the lead-through cylinder is correspondingly and insertedly arranged in the guide channel, the peripheral surface of the lead-through cylinder is connected with the connecting conductor in lead-through mode through the spring contact fingers, a driving rod is connected with the lead-through cylinder, the driving rod is located in the interior of the gear accommodating subcavity, a driving rack extends along the extension direction of the driving rod and is pinned to the surface of the driving rod, and the driving rack and the driving gear in the gear accommodating subcavity form a gear rack mechanism.

[0007] Preferably, the end of the lead-through cylinder is formed with a matching counterbore, the end of the driving rod is formed with an insertion boss corresponding to the matching counterbore, and the insertion boss is insertedly matched with the matching counterbore.

[0008] Further, the insertion boss has a connecting threaded hole, the bottom of the matching counterbore has a connecting via hole coaxial with the connecting threaded hole, the lead-through cylinder has a hollow channel extending along the length of the lead-through cylinder, one end of the hollow channel is communicated with the connecting via hole, and the other end of the hollow channel is outward open, so that the insertion boss is fixed in the interior of the matching counterbore through threaded connection.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] 1. Because the movable contact rod for double-break disconnecting switch of the utility model includes a conducting barrel, a driving rod and a driving rack, the conducting barrel is inserted in the guide channel in correspondence, the peripheral surface of the conducting barrel is connected with the connecting conductor through spring contact fingers, the driving rod is connected with the conducting barrel, and the driving rod is inside the gear accommodating sub-cavity, the driving rack extends along the extension direction of the driving rod and is pinned on the surface of the driving rod, and the driving rack and the driving gear in the gear accommodating sub-cavity form a gear rack mechanism, that is, the movable contact rod is assembled through the conducting barrel and the driving rod, so that different materials can be selected, since the movable contact rod is connected with the spring contact fingers of the guide channel through the conducting barrel, only the conducting barrel is made of copper material, and only the conducting barrel is silver-plated, and the driving rod is made of aluminum which is cheaper, harder and easier to process than copper, therefore, the utility model can significantly reduce the material cost of the movable contact rod, and the conducting barrel which is symmetrical along the breaking direction is suitable for rolling silver-plating, so that the flatness of the silver-plated layer is also obviously improved, and when the driving rack is pinned on the driving rod by hammering, the harder aluminum driving rod also greatly reduces the influence of hammering on the overall coaxiality of the movable contact rod.

[0011] 2. Because the end of the conducting barrel is formed with a matching counterbore, the end of the driving rod is formed with an insertion boss corresponding to the matching counterbore, and the insertion boss is inserted into the matching counterbore, therefore, the utility model facilitates the coaxiality of the conducting barrel and the driving rod through the cooperation of the insertion boss and the matching counterbore, so that the overall coaxiality of the movable contact rod can be conveniently improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic view of the connecting conductor and the movable contact rod of the prior art;

[0013] Figure 2 is a schematic view of the movable contact rod of the prior art;

[0014] Figure 3 is a schematic view of the movable contact rod for double-break disconnecting switch of the embodiment of the utility model;

[0015] Figure 4 is a perspective view of the conducting barrel of the embodiment of the utility model;

[0016] Figure 5 is a sectional view of Figure 4 ;

[0017] Figure 6 is a perspective view of the driving rod of the embodiment of the utility model.

[0018] In the figure: 100, the moving contact rod of the double-break disconnecting switch, 10, the conducting barrel, 10a, the matching counterbore, 10b, the connecting via hole, 10c, the hollow channel, 20, the driving rod, 20a, the insertion boss, 20b, the connecting threaded hole, 30, the driving rack. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the following embodiments will be specifically described in combination with the drawings for the moving contact rod of the double-break disconnecting switch of the utility model. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation on the utility model.

[0020] The moving contact rod 100 of the double-break disconnecting switch in the embodiment is arranged in the accommodating inner cavity of the connecting conductor of the GIS. The accommodating inner cavity has a gear accommodating sub-cavity and a guiding channel continuous with the gear accommodating sub-cavity. The guiding channel is outwardly open and internally provided with spring contact fingers. Specifically, the gear accommodating sub-cavity is the gear accommodating inner cavity of the prior art.

[0021] As shown in the figure, the moving contact rod 100 of the double-break disconnecting switch comprises a conducting barrel 10, a driving rod 20 and a driving rack 30. Figure 3

[0022] The conducting barrel 10 is correspondingly inserted into the guiding channel. The peripheral surface of the conducting barrel 10 is in conductive connection with the connecting conductor through the spring contact fingers. Specifically, the conducting barrel 10 is a cylinder in material. A silver plating layer is coated on the surface of the conducting barrel 10 through a rolling silver plating process. The overall profile of the conducting barrel 10 is a cylinder extending along the breaking direction of the double-break disconnecting switch. The silver plating layer of the conducting barrel 10 is always in conductive contact with the inner wall of the connecting conductor through the spring contact fingers and forms dynamic friction.

[0023] As shown in the figures, Figure 4 and Figure 5 The conducting barrel 10 is formed with a matching counterbore 10a, a connecting via hole 10b and a hollow channel 10c. Specifically, the conducting barrel 10 is made of copper. A silver plating layer is coated on the peripheral surface of the conducting barrel 10 through a rolling silver plating process.

[0024] The matching counterbore 10a and the connecting via hole 10b are both formed on the end surface of the conducting barrel 10 close to the guiding channel. The hollow channel 10c is formed in the interior of the conducting barrel 10 and extends along the extension direction of the conducting barrel 10.

[0025] The connecting via hole 10b is formed on the bottom of the matching counterbore 10a. One end of the hollow channel 10c is in communication with the connecting via hole 10b, and the other end is outwardly open to the exterior of the connecting conductor through the end surface of the conducting barrel 10. Specifically, the matching counterbore 10a, the connecting via hole 10b and the hollow channel 10c are coaxial.​

[0026] The drive rod 20 is connected to the end of the guide cylinder 10, and the drive rod 20 is located inside the gear receiving cavity.

[0027] like Figure 6 As shown, the drive rod 20 has an insertion boss 20a and a connecting threaded hole 20b. Specifically, the drive rod 20 is made of aluminum, which is cheaper, harder, and easier to process than copper.

[0028] The insertion boss 20a is located at the end of the drive rod 20 connected to the end of the guide cylinder 10, and the insertion boss 20a corresponds to the mating countersunk hole 10a. The insertion boss 20a is inserted into the mating countersunk hole 10a.

[0029] The connecting threaded hole 20b is formed on the insertion boss and opens toward the mating countersunk hole 10a. The connecting threaded hole 20b is coaxial with the connecting through hole 10b, so that the insertion boss 20a is fixed inside the mating countersunk hole 10a by threaded connection. Specifically, the screw passes through the hollow channel 10c and is threadedly connected to the connecting threaded hole 20b, thereby realizing the coaxial fixed connection between the guide cylinder 10 and the drive rod 20.

[0030] The drive rack 30 extends along the extension direction of the drive rod 20 and is pinned to the surface of the drive rod 20. The drive rack 30 and the drive gear in the gear receiving cavity form a gear rack mechanism. Specifically, the drive racks 30 of the double-break disconnect switch are used in pairs, and the two drive racks 30 respectively mesh with the opposite sides of the drive gear. So when the drive gear rotates under the drive of the external operating mechanism, the two moving contact rods 30 extend or retract outward toward the opposite sides, thereby realizing the synchronous conduction or disconnection of the double breaks.

[0031] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A movable contact rod for a double-break disconnector, provided in a connection conductor accommodating inner cavity of a GIS, the connection conductor accommodating inner cavity having a gear accommodating sub-cavity and a guide passage continuous with the gear accommodating sub-cavity, the guide passage being outwardly open and internally provided with spring contact fingers, characterized in that, The utility model relates to a double-break isolation switch movable contact rod, comprising: a through hole, which is matched and inserted into the guide channel, and the peripheral surface of the through hole is connected with the connecting conductor through the spring contact finger, a driving rod, which is terminated with the through hole, and the driving rod is located inside the gear accommodating sub-cavity, a driving rack, which is extended along the extension direction of the driving rod and is pinned on the surface of the driving rod, and the driving rack forms a gear rack mechanism with the driving gear inside the gear accommodating sub-cavity.

2. The double-break isolation switch movable contact rod according to claim 1, wherein: wherein an end of the through hole is formed with a matched counterbore, an end of the driving rod is formed with an insertion boss corresponding to the matched counterbore, the insertion boss is matched and inserted into the matched counterbore.

3. The double-break isolation switch movable contact rod according to claim 2, wherein: wherein the insertion boss has a connecting threaded hole, and the bottom of the matched counterbore has a connecting via hole coaxial with the connecting threaded hole, the through hole has a hollow channel extended along the length of the through hole, one end of the hollow channel is communicated with the connecting via hole, and the other end is open to the outside, so that the insertion boss is fixed in the inside of the matched counterbore through threaded connection.

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