Body structure of environment-friendly grounding switch

Abstract

The invention relates to a body structure of an environment-friendly grounding switch. In a shell, three phases share a box, a moving contact rod is arranged on an insulating plate, the insulating plate is connected with a pull rod, the pull rod and a crank arm are in transmission through a pin, the rotating motion of the crank arm is converted into the linear motion of the pull rod, a static contact seat is arranged on a basin-type insulator insert, and a static main contact is tightly held around the contact seat through a spring. The lower half part is in point contact with the static contact seat, and the upper half part is in point contact with the moving contact rod; the moving contact rod is installed on the moving contact seat, a groove is formed in the moving contact seat, the spring contact finger is installed in the groove and makes contact with the guide cylinder, the conductive plate is connected with the guide cylinder and the conductive rod of the grounding terminal, and the three-phase conductive rod is in short circuit through the outer conductive plate. When the grounding switch is switched on, current passes through the static contact seat, the static main contact, the moving contact rod, the spring contact finger, the guide cylinder, the inner current-conducting plate, the current-conducting rod of the grounding terminal and the outer current-conducting plate to form an access, and grounding of a high-potential conductor on the basin-type insulator is achieved. The grounding switch body structure is an environment-friendly grounding switch body structure, three phases share a box, the structure is simple and compact, the number of parts is small, operation is easy, and reliability is high.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear technology, and mainly to the body structure of an environmentally friendly grounding switch. Background Technology

[0002] With increasing global warming, my country plans to regularly reduce greenhouse gas emissions. The power industry primarily uses equipment containing fluorinated gases, such as SF6 and its mixtures. SF6's greenhouse effect is 22,200 times that of CO2. Since global carbon emissions reached a record high of 36.8 billion tons in 2019, the power industry has faced increasing pressure to accelerate decarbonization and emission reduction. Domestic power industry users have successively formulated SF6 emission reduction action plans. Existing grounding switches cannot be used in environmentally friendly switchgear with insulating media; therefore, it is necessary to develop a new environmentally friendly grounding switch that meets user needs. Summary of the Invention

[0003] This invention designs an environmentally friendly grounding switch body structure, which features a simple and compact design, few parts, easy operation, and high reliability.

[0004] This invention is achieved through the following structure:

[0005] An environmentally friendly grounding switch includes a housing with an operating mechanism for grounding. Inside the housing, three phases share a common enclosure. A moving contact rod is mounted on an insulating plate, which is connected to a pull rod. The pull rod and a crank arm are connected via a pin. A stationary contact seat is mounted on a basin-type insulator insert. The stationary main contact is held tightly around the contact seat by a spring, with its lower half in point contact with the stationary contact seat and its upper half in point contact with the moving contact rod. The moving contact rod is mounted on the moving contact seat, which has a slot. A spring contact finger is installed in the slot and contacts a guide cylinder. An inner conductive plate connects the guide cylinder and the conductive rod of the grounding terminal. An outer conductive plate short-circuit the three-phase conductive rods.

[0006] The power output end of the grounding switch operating mechanism is connected to one end of the crank arm, and the other end of the crank arm is connected to the top of the pull rod. The grounding switch operating mechanism drives the pull rod to move linearly in the vertical direction.

[0007] The guide cylinder is located outside the moving contact rod. The top of the guide cylinder is provided with a moving contact seat guide ring, and the bottom of the guide cylinder is provided with a cover plate inner guide ring. The moving contact rod passes through the moving contact seat guide ring, the guide cylinder, and the cover plate inner guide ring, and moves along the axis of the guide cylinder.

[0008] The static arc contact and the head of the moving contact rod are made of copper-tungsten alloy. When the grounding switch is closed, the static arc contact and the head of the moving contact rod are in contact. The current passes through the static contact seat, the static main contact, the moving contact rod, the spring contact finger, the guide cylinder, the inner conductive plate, the conductive rod of the grounding terminal, and the outer conductive plate to form a path, thereby realizing the grounding of the high-potential conductor on the basin-type insulator.

[0009] The three phases inside the housing share a common operating mechanism for a grounding switch.

[0010] An insulating sleeve and an insulating pad are provided between the guide cylinder and the housing to ensure that the guide cylinder and the housing are at the same potential.

[0011] The inner conductive plate has an L-shaped lug structure. The lower horizontal plate of the inner conductive plate is connected to the top of the guide cylinder, and the upper vertical plate of the inner conductive plate is connected to the conductive rod.

[0012] The beneficial effects of this invention are as follows: The environmentally friendly grounding switch of this invention has a simple body structure, with three phases sharing a common enclosure and a single operating mechanism, effectively ensuring phase-to-phase synchronization. It has a compact structure, fewer types of parts, and low manufacturing cost. The moving contact rod head and the stationary arc contact head are made of copper-tungsten alloy, which has strong resistance to arc erosion and is better able to meet the high parameter requirements of electromagnetic induction and electrostatic induced current in the power grid. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the closing position of the present invention;

[0014] Figure 2 This is a schematic diagram of the tripping position of the present invention;

[0015] Figure 3 yes Figure 1 Sectional view along the DD direction;

[0016] Figure 4 This is a schematic diagram of the position where the moving and stationary contacts of the environmentally friendly grounding switch of the present invention have just come into contact or just separated.

[0017] In the diagram: 1. Stationary contact seat; 2. Stationary contact; 3. Spring; 4. Stationary arc contact; 5. Moving contact rod; 6. Moving contact seat guide ring; 7. Moving contact seat; 8. Spring contact finger; 9. Insulating sleeve; 10. Insulating pad; 11. Guide cylinder; 12. Inner guide ring of cover plate; 13. Inner conductive plate; 14. Conductive rod; 15. Outer conductive plate; 16. Insulating plate; 17. Pull rod; 18. Housing; 19. Pin; 20. Crank arm; 21. Operating mechanism for grounding switch. Detailed Implementation

[0018] The specific implementation process of the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] An environmentally friendly grounding switch body structure includes a housing 18, an operating mechanism 21 for the grounding switch on the outside of the housing 18, a three-phase common box inside the housing 18, a moving contact rod 5 mounted on an insulating plate 16, the insulating plate 16 connected to a pull rod 17, the pull rod 17 and a crank arm 19 connected by a pin drive, converting the rotational motion of the crank arm 19 into the linear motion of the pull rod 17, a stationary contact seat 1 mounted on a basin-type insulator insert, a stationary contact 2 held tightly around the contact seat by a spring 3, the lower half of which makes point contact with the stationary contact seat 1, and the upper half of which makes point contact with the moving contact rod 5; the moving contact rod 5 is mounted on the moving contact seat 5, the moving contact seat 5 has a slot, a spring contact finger 8 is installed in the slot, the spring contact finger 8 contacts the guide cylinder 11, an inner conductive plate 13 connects the guide cylinder 11 and the conductive rod 14 of the grounding terminal, and an outer conductive plate 15 short-circuit the three-phase conductive rods 14.

[0020] Preferably, the power output end of the grounding switch operating mechanism 21 is connected to one end of the crank arm 20, and the other end of the crank arm 20 is connected to the top of the pull rod 17. The grounding switch operating mechanism 21 drives the pull rod 17 to move linearly in the vertical direction.

[0021] Preferably, the guide cylinder 11 is located outside the moving contact rod 5. The top of the guide cylinder 11 is provided with a moving contact seat guide ring 6, and the lower part of the guide cylinder 11 is provided with a cover plate inner guide ring 12. The moving contact rod 5 passes through the moving contact seat guide ring 6, the guide cylinder 11, and the cover plate inner guide ring 12. The moving contact rod 5 moves along the axial direction of the guide cylinder 11 to ensure the direction of movement of the moving contact rod 5.

[0022] Preferably, the heads of the stationary arc contact 4 and the moving contact rod 7 are made of copper-tungsten alloy. When the grounding switch is closed, the heads of the stationary arc contact 4 and the moving contact rod 7 are in contact, and the current passes through the stationary contact seat 1, the stationary main contact 2, the moving contact rod 5, the spring contact finger 8, the guide cylinder 11, the inner conductive plate 13, the conductive rod 14 of the grounding terminal, and the outer conductive plate 15 to form a circuit, thereby realizing the grounding of the high-potential conductor on the basin insulator.

[0023] Preferably, an insulating sleeve 9 and an insulating pad 10 are provided between the guide cylinder 11 and the housing 18 to ensure that the guide cylinder 11 and the housing 18 are at the same potential.

[0024] Preferably, the inner conductive plate 13 has an L-shaped ear structure, the lower horizontal plate of the inner conductive plate 13 is connected to the top of the guide cylinder 11, and the upper vertical plate of the inner conductive plate 13 is connected to the conductive rod 14.

[0025] like Figure 1The diagram shows the closing position of the grounding switch. The grounding switch's operating mechanism 21 drives the crank arm 20, which in turn moves the pull rod 17 downwards. The pull rod 17 drives the end-connected insulating plate 16, which in turn moves the moving contact rod 5, connected to the insulating plate 16, to its lower end, inserting it into the stationary contact 2. The stationary arc contact 4 contacts the head of the moving contact rod 7. Current flows through the stationary contact seat 1, stationary main contact 2, moving contact rod 5, spring contact finger 8, guide cylinder 11, inner conductive plate 13, conductive rod 14 of the grounding terminal, and outer conductive plate 15 to form a circuit, achieving grounding of the high-potential conductor on the basin-type insulator.

[0026] like Figure 4 As shown, this is the position where the moving and stationary contacts of the grounding switch have just touched or just separated.

[0027] like Figure 2 The diagram shows the position where the grounding switch is tripped. The grounding switch uses the operating mechanism 21 to drive the crank arm 20, which in turn drives the pull rod 17 upward. The pull rod 17 drives the insulating plate 16 connected to its end, which in turn drives the moving contact rod 5 connected to the insulating plate 16 to move to the upper end and retract into the guide cylinder 11.

[0028] like Figure 3 As shown, the three phases of the grounding switch are arranged in an equilateral triangle inside the housing. The three phases share a common enclosure inside the housing 18 and share a single grounding switch operating mechanism 21, which effectively ensures phase-to-phase synchronization. The structure is compact, with fewer types of parts and low manufacturing cost.

Claims

1. A body structure of an environmentally friendly grounding switch, comprising a housing (18), wherein an operating mechanism (21) for the grounding switch is provided outside the housing (18), characterized in that: Inside the housing (18), the three phases share a common box. The moving contact rod (5) is mounted on the insulating plate (16). The insulating plate (16) is connected to the pull rod (17). The pull rod (17) and the crank arm (20) are driven by the pin (19). The stationary contact seat (1) is installed on the basin-type insulator insert. The stationary main contact (2) is held tightly around the contact seat (1) by the spring (3). The lower half is in point contact with the stationary contact seat (1), and the upper half is in point contact with the moving contact rod (5). The moving contact rod (5) is mounted on the moving contact seat (7). The moving contact seat (7) has a slot. The spring contact finger (8) is installed in the slot. The spring contact finger (8) contacts the guide cylinder (11). The inner conductive plate (13) connects the guide cylinder (11) and the conductive rod (14) of the grounding terminal. The outer conductive plate (15) short-circuit the three-phase conductive rod (13).

2. The body structure of an environmentally friendly grounding switch according to claim 1, characterized in that: The power output end of the grounding switch operating mechanism (21) is connected to one end of the crank arm (20), and the other end of the crank arm (20) is connected to the top of the pull rod (17). The grounding switch operating mechanism (21) drives the pull rod (17) to make a linear movement in the vertical direction.

3. The body structure of an environmentally friendly grounding switch according to claim 1, characterized in that: The guide cylinder (11) is located outside the moving contact rod (5). The top of the guide cylinder (11) is provided with a moving contact seat guide ring (6), and the bottom of the guide cylinder (11) is provided with a cover plate inner guide ring (12). The moving contact rod (5) passes through the moving contact seat guide ring (6), the guide cylinder (11), and the cover plate inner guide ring (12). The moving contact rod (5) moves along the axis of the guide cylinder (11).

4. The body structure of an environmentally friendly grounding switch according to claim 1, characterized in that: The static arc contact (4) and the head of the moving contact rod (7) are copper-tungsten parts. When the grounding switch is closed, the static arc contact (4) and the head of the moving contact rod (7) are in contact. The current passes through the static contact seat (1), the static main contact (2), the moving contact rod (5), the spring contact finger (8), the guide cylinder (11), the inner conductive plate (13), the conductive rod (14) of the grounding terminal, and the outer conductive plate (15) to form a path, thereby realizing the grounding of the high potential conductor on the basin insulator.

5. The body structure of an environmentally friendly grounding switch according to claim 1, characterized in that: The housing (18) has three common boxes inside, sharing a common grounding switch operating mechanism (21).

6. The body structure of an environmentally friendly grounding switch according to claim 1, characterized in that: An insulating sleeve (9) and an insulating pad (10) are provided between the guide cylinder (11) and the housing (18) to ensure that the guide cylinder (11) and the housing (18) are at the same potential.

7. The body structure of an environmentally friendly grounding switch according to claim 1, characterized in that: The inner conductive plate (13) is an L-shaped ear structure. The lower horizontal plate of the inner conductive plate (13) is connected to the top of the guide cylinder (11), and the upper vertical plate of the inner conductive plate (13) is connected to the conductive rod (14).

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