Moving and static contact connecting mechanism of disconnecting switch

Abstract

The utility model discloses a moving and static contact connecting mechanism of an isolating switch, which relates to the technical field of isolating switches and comprises a bearing frame, a driving rod, a first insulating column, a first contact piece and a second traction rod. The brake control mechanism comprises a driving rod, a connecting brake rod, a first traction rod, a first insulating column and a second traction rod, the driving rod is connected with an external driving assembly to provide power for the first traction rod, the first insulating column and the second traction rod to drive the connecting brake rod to achieve the opening and closing functions, the optimal design of an arc extinguishing block and the application of a high-performance material are achieved, and the service life of the arc extinguishing block is prolonged. Therefore, the arc extinguishing efficiency is greatly improved, the damage of the arc to the contact and the surrounding parts is reduced, the maintenance cost is reduced, and the overall service life of the isolating switch is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of disconnecting switch, concretely is a kind of movable contact and static contact connecting mechanism of disconnecting switch. BACKGROUND

[0002] Disconnecting switch is a kind of switch electric appliance in electric power system, and it has the functions of isolating power supply, switching operation, connecting and cutting off small current circuit, but the existing disconnecting switch has some deficiencies, for example:

[0003] The high-voltage disconnecting switch disclosed in application No. CN202421130868.9 does not have a movable contact and static contact arc extinguishing structure, and in actual use, due to the characteristics of high-voltage electricity, electric arc is generated between the contacts, which causes the contact point to be high-temperature and causes wear to the contact point, and has certain safety hazards. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a movable contact and static contact connecting mechanism of disconnecting switch to solve the problem that the existing equipment in the market does not have a movable contact and static contact arc extinguishing structure, and in actual use, due to the characteristics of high-voltage electricity, electric arc is generated between the contacts, which causes the contact point to be high-temperature and causes wear to the contact point, and has certain safety hazards.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a movable contact and static contact connecting mechanism of disconnecting switch, which comprises a bearing frame, a driving rod, a first insulating column, a first contact piece and a second traction rod.

[0006] A control brake mechanism is arranged above the bearing frame, and the control brake mechanism comprises a driving rod, a connecting brake rod, a first traction rod, a first insulating column and a second traction rod.

[0007] A closing brake auxiliary mechanism is arranged on the side surface of the connecting brake rod, and the closing brake auxiliary mechanism comprises a first contact piece, a spring, a nut, an arc extinguishing block, a second contact piece and a stud.

[0008] As a preferred technical scheme of the utility model, the bearing frame is in a rectangular structure, and bolt holes are uniformly arranged on the surface of the bearing frame.

[0009] By the technical scheme, the six second insulating columns symmetrically distributed through the second insulating column can well separate the upper assembly from the bearing frame, and effectively improve the safety of the equipment.

[0010] As the preferred technical scheme of the utility model, the top of the second insulating column on the left side of the bearing frame is bolted with the second contact piece, and the top of the second insulating column on the right side of the bearing frame is bolted with the first contact piece, the first contact piece and the second contact piece are the same in overall structure, and the first contact piece is only different from the second contact piece in that a circular hole is formed in the side surface of the first contact piece, and a pair of bolt hole positions are formed in the outer side surfaces of the first contact piece and the second contact piece.

[0011] By the technical scheme, the second contact piece and the first contact piece bolted together are simple in structure and have good reliability, and a pair of bolt hole positions are formed in the outer side surfaces of the first contact piece and the second contact piece, so that the external cable can be conveniently installed, and the compatibility of the equipment is improved.

[0012] As the preferred technical scheme of the utility model, the first contact piece is rotatably connected with the connecting gate rod, the connecting gate rod is in the shape of an I-beam and is composed of two U-shaped groove plates, the stud in the closing auxiliary mechanism penetrates through the connecting gate rod and the first contact piece and is threadedly connected with the nut, a spring is sleeved between the side surface of the nut and the connecting gate rod, a pair of arc extinguishing blocks are bolted to the left side of the connecting gate rod, the side surface of the arc extinguishing block is in a lattice structure, a U-shaped groove is formed in the lattice position of the arc extinguishing block, and the second contact piece is clamped below the left side of the connecting gate rod.

[0013] By the technical scheme, the spring is made of high-strength alloy spring steel material and is subjected to special heat treatment process, so that the spring has higher elastic limit and fatigue life and can maintain stable elastic force in long-time and frequent closing operation, so that the movable and static contact pieces are always kept in close contact, the arc extinguishing block is made of ceramic material resistant to high temperature and arc erosion, the porosity of the lattice structure of the arc extinguishing block is accurately calculated and designed, the arc can be more effectively guided into the pores, the arc can be quickly extinguished by using the gas cooling and diffusion effect in the pores, the arc extinguishing efficiency is improved, the contact piece ablation is reduced, and the service life of the disconnecting switch is prolonged.

[0014] As the preferred technical scheme of the utility model, the connecting gate rod is rotatably connected with the second traction rod below, the second traction rod is threadedly connected with the first insulating column below, the first insulating column and the second insulating column are the same in structure, and the volume of the second insulating column is one and a half times that of the first insulating column, the first insulating column is threadedly connected with the first traction rod below, the first traction rod is rotatably connected with the driving rod, the driving rod is rotatably connected to the inner side of the bearing frame, and the input end of the driving rod is arranged on the side edge of the bearing frame.

[0015] Adopting the technical scheme, the contact surfaces of the first contact piece and the second contact piece are plated with silver alloy plating layers, the silver alloy has good conductivity and corrosion resistance, can reduce contact resistance of the contact, reduce heat generation, and further improve electrical performance and reliability of the disconnecting switch.

[0016] Compared with the prior art, the disconnecting switch has the advantages that:

[0017] 1. Improved contact stability: the continuous and stable extrusion of the spring ensures that the first contact piece and the second contact piece always closely adhere in the closed state, effectively avoiding problems of loose contact and poor contact caused by vibration, impact and other factors, and ensuring reliability of power transmission;

[0018] 2. Enhanced arc extinguishing capacity: the optimized design of the arc extinguishing block and the application of high-performance materials greatly improve arc extinguishing efficiency, reduce damage of the arc to the contact and surrounding components, reduce maintenance cost, and prolong overall service life of the disconnecting switch;

[0019] 3. Reduced contact resistance: the silver alloy plating layer on the surface of the contact piece significantly reduces contact resistance, reduces power loss and heat generation, and improves stability and safety of the disconnecting switch under high load working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a side view structural schematic diagram of the utility model;

[0021] Figure 2 is a bearing frame and driving rod structure schematic diagram of the utility model;

[0022] Figure 3 is an arc extinguishing block and second contact piece structure schematic diagram of the utility model;

[0023] Figure 4 is an arc extinguishing block side view structural schematic diagram of the utility model;

[0024] Figure 5 is a spring and nut structure schematic diagram of the utility model;

[0025] Figure 6 is a first traction rod and second traction rod structure schematic diagram of the utility model.

[0026] In the drawing: 1, bearing frame; 2, driving rod; 3, first insulating column; 4, first contact piece; 5, connecting brake lever; 6, spring; 7, nut; 8, arc extinguishing block; 9, second contact piece; 10, second insulating column; 11, first traction rod; 12, stud; 13, second traction rod. DETAILED DESCRIPTION

[0027] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Please refer to Figures 1-6 The technical scheme of the present application is: a movable and static contact connection mechanism of a disconnecting switch, comprising a bearing frame 1, a driving rod 2, a first insulating column 3, a first contact piece 4, a connecting brake lever 5, a spring 6, a nut 7, an arc extinguishing block 8, a second contact piece 9, a second insulating column 10, a first traction rod 11, a stud 12 and a second traction rod 13.

[0029] The bearing frame 1 is in a rectangular structure, and bolt holes are uniformly distributed on the surface. On both sides of the center line of the bearing frame 1, six second insulating columns 10 are symmetrically distributed and fixed by bolts. The second insulating columns 10 are composed of insulators, which can effectively separate the components above the bearing frame 1 from the bearing frame, greatly improving the safety of the equipment.

[0030] A brake control mechanism is arranged above the bearing frame 1. The mechanism is composed of the driving rod 2, the connecting brake lever 5, the first traction rod 11, the first insulating column 3 and the second traction rod 13. The driving rod 2 is connected with an external driving assembly to provide power for the first traction rod 11, the first insulating column 3 and the second traction rod 13, thereby driving the connecting brake lever 5 to realize the function of opening and closing the brake.

[0031] The connecting brake lever 5 is provided with a closing auxiliary mechanism on the side surface, which is composed of the first contact piece 4, the spring 6, the nut 7, the arc extinguishing block 8, the second contact piece 9 and the stud 12.

[0032] The second contact piece 9 is fixed on the top of the second insulating column 10 on the left side of the center line of the bearing frame 1 by a bolt. The first contact piece 4 is fixed on the top of the second insulating column 10 on the right side of the center line. The first contact piece 4 and the second contact piece 9 have the same overall structure, except that the first contact piece 4 has a circular hole on the side surface, and a pair of bolt holes are arranged on the outer side of both. This bolt fixing method is simple in structure and high in reliability. The bolt holes on the outer side are convenient for installing external cables, and the compatibility of the equipment is improved.

[0033] The first contact 4 is rotatably connected with a connecting brake lever 5, the connecting brake lever 5 is in the shape of an I-beam and is composed of two U-shaped groove plates, in the auxiliary closing mechanism, the stud 12 penetrates the connecting brake lever 5, the first contact 4 in sequence and is threadedly connected with the nut 7, the spring 6 is sleeved between the side surface of the nut 7 and the connecting brake lever 5, a pair of arc extinguishing blocks 8 is fixed on the left side of the connecting brake lever 5 through bolts, the side surface of the arc extinguishing block 8 is in the form of a grid structure, the grid structure is provided with a U-shaped groove, and the second contact 9 is clamped below the left side of the connecting brake lever 5;

[0034] The spring 6 is made of high-strength alloy spring 6 steel material and is subjected to special heat treatment process, has higher elastic limit and fatigue life, can keep stable elastic force in frequent closing operation, ensures that the moving and static contacts are in close contact, the arc extinguishing block 8 is made of ceramic material which is resistant to high temperature and arc erosion, the porosity of the grid structure of the arc extinguishing block 8 is accurately designed, can effectively guide the arc into the pores, utilizes the cooling and diffusion effect of the gas in the pores to quickly extinguish the arc, reduces the ablation of the contacts and prolongs the service life of the disconnecting switch;

[0035] The connecting brake lever 5 is rotatably connected with a second traction rod 13 below, the second traction rod 13 is threadedly connected with the first insulating column 3 below, the first insulating column 3 and the second insulating column 10 are of the same structure, but the volume of the second insulating column 10 is 1.5 times that of the first insulating column 3, the first traction rod 11 is threadedly connected with the first insulating column 3 below, the first traction rod 11 is rotatably connected with the driving rod 2, the driving rod 2 is rotatably connected to the inner side of the bearing frame 1, and the input end is arranged on the side edge of the bearing frame 1;

[0036] In addition, the contact surfaces of the first contact 4 and the second contact 9 are plated with a silver alloy plating layer, the silver alloy has good conductivity and corrosion resistance, can reduce the contact resistance of the contacts, reduce the heat generation and further improve the electrical performance and reliability of the disconnecting switch.

[0037] Working principle: when the moving and static contact connecting mechanism of a disconnecting switch is used, when the driving rod 2 is driven to rotate by an external driving assembly, the driving rod 2 drives the first traction rod 11 to move, the first traction rod 11 drives the second traction rod 13 to rise or fall through the first insulating column 3, and then drives the connecting brake lever 5 to rotate around the rotating connection point of the first contact 4, in the closing process, the connecting brake lever 5 rotates downward, when approaching the second contact 9, the elastic force of the spring 6 pushes the connecting brake lever 5 to be squeezed inward on both sides, so that the arc extinguishing blocks 8 on the connecting brake lever 5 tightly clamp the first contact 4 and are in contact with the second contact 9, forming an electrical path, in the opening process, the driving rod 2 reversely rotates, drives the connecting brake lever 5 to rotate upward, so that the first contact 4 is separated from the second contact 9, and the arc extinguishing blocks 8 quickly play the arc extinguishing role when the arc is generated.

[0038] Thus a series of work is completed, and the contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0039] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A movable and static contact connection mechanism of an isolating switch, comprising a bearing frame (1); a control brake mechanism is arranged above the bearing frame (1), the control brake mechanism comprises a driving rod (2), a connecting brake rod (5), a first traction rod (11), a first insulating column (3) and a second traction rod (13), the driving rod (2) is connected with an external driving assembly to provide power for the first traction rod (11), the first insulating column (3) and the second traction rod (13) to drive the connecting brake rod (5) to realize the function of opening and closing; characterized in that: The connecting brake lever (5) is provided with a closing auxiliary mechanism on the side, the closing auxiliary mechanism comprises a first contact piece (4), a spring (6), a nut (7), an arc extinguishing block (8), a second contact piece (9) and a stud (12), the spring (6) is tightly clamped to the first contact piece (4) by extrusion, and the first contact piece (4) and the second contact piece (9) constitute a passage under the cooperation of the arc extinguishing block (8).

2. The moving and stationary contact connecting mechanism of a disconnector according to claim 1, characterized in that, The bearing frame (1) is in a rectangular structure as a whole, bolt holes are uniformly arranged on the surface of the bearing frame (1), the second insulating columns (10) are fixed on the both sides of the center line of the bearing frame (1) by bolts, the second insulating columns (10) are symmetrically distributed and are composed of insulators.

3. The moving contact connecting mechanism of a disconnector according to claim 1, characterized in that, The second contact piece (9) is fixed on the top of the second insulating column (10) on the left side of the center line of the bearing frame (1) by bolts, and the first contact piece (4) is fixed on the top of the second insulating column (10) on the right side of the center line of the bearing frame (1) by bolts, the first contact piece (4) is the same in structure as the second contact piece (9), and only differs from the second contact piece (9) in that a circular hole is arranged on the side of the first contact piece (4), and a pair of bolt holes are arranged on the outer sides of the first contact piece (4) and the second contact piece (9).

4. The moving and stationary contact connecting mechanism of a disconnector according to claim 1, characterized in that, The connecting brake lever (5) is rotatably connected above the first contact piece (4), the connecting brake lever (5) is in a I-shaped structure as a whole and is composed of two U-shaped groove plates, the stud (12) in the closing auxiliary mechanism penetrates through the connecting brake lever (5), the first contact piece (4) and the nut (7) and is threadedly connected, the nut (7) is sleeved with the spring (6) between the side and the connecting brake lever (5), a pair of arc extinguishing blocks (8) are fixed on the left side of the connecting brake lever (5) by bolts, the side of the arc extinguishing block (8) is in a grid structure, and a U-shaped groove is arranged at the grid position of the arc extinguishing block (8), and the second contact piece (9) is clamped below the left side of the connecting brake lever (5).

5. The moving and stationary contact connecting mechanism of a disconnector according to claim 1, characterized in that, The second traction rod (13) is rotatably connected below the connecting brake lever (5), the first insulating column (3) is threadedly connected below the second traction rod (13), the first insulating column (3) is the same in structure as the second insulating column (10), and the volume of the second insulating column (10) is one and a half times that of the first insulating column (3), the first traction rod (11) is threadedly connected below the first insulating column (3), the first traction rod (11) is rotatably connected with the driving rod (2), the driving rod (2) is rotatably connected to the inner side of the bearing frame (1), and the input end of the driving rod (2) is arranged on the side of the bearing frame (1).

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