A special interlocking device for environmentally friendly gas-insulated switchgear

Abstract

The present invention relates to the technical field of insulating switches, specifically, an interlocking device dedicated to environmentally friendly gas insulated switchgear, comprising a vertical connecting rod and a locking rod arranged vertically, an interlocking plate sliding laterally along the circuit breaker operating mechanism box, and the isolating switch lever and the interlocking plate moving synchronously; the vertical connecting rod is fixedly connected to the opening and closing switch lever, and the locking rod is fixedly connected to the opening and closing switch lever via a transverse connecting rod; the top surface of the interlocking plate is fixedly connected to a support plate, a groove is provided on the support plate, and a slot is also provided on the interlocking plate; when the vertical connecting rod is inserted into the groove, the locking rod is inserted into the slot. The use of this application, under the premise of satisfying "when the opening and closing switch is closed, the isolating switch lever is prohibited from moving laterally, and when the isolating switch lever moves laterally, the opening and closing switch is prohibited from closing", is not only simple in structure and smooth in operation, but also easy to install on environmentally friendly gas insulated switchgear.

Description

Technical Field

[0001] The invention belongs to the technical field of insulating switches, in particular to an interlocking device dedicated to environmentally friendly gas-insulated switchgear. Background Art

[0002] With the rapid development of information technology, State Grid Corporation of China has proposed the development strategy of "strong smart grid, ubiquitous power Internet of Things". With the formal entry into force of the Kyoto Protocol, governments and users of various countries have put forward higher environmental protection requirements for power transmission and distribution equipment. In order to ensure the safe operation of the power grid, continuously improve the reliability level, actively adapt to the large-scale access of new energy and optimize the allocation of power grid resources, and build an energy-saving and environmentally friendly power grid that is more in line with the requirements of the economy and society, environmentally friendly gas-insulated switchgear has become a trend of future development.

[0003] According to the "Safety Management Regulations for Preventing Electrical Misoperation of State Grid Corporation of China" (State Grid Safety Supervision

[2006] No. 904), the five electrical protections require that when the switch cabinet is closed, the disconnector cannot be operated, and when the switch cabinet is opened, the disconnector is allowed to operate; the disconnector can only be closed after the disconnector has fully operated, and cannot be closed if the disconnector has not fully operated.

[0004] The interlocking device structure in the prior art is relatively complex, and there is a jamming phenomenon during the transmission process, which affects the opening and closing operations and isolation operations during the actual operation process, and there are safety hazards. In addition, the existing interlocking device structure layout is not convenient for installation on environmentally friendly gas-insulated switchgear. Summary of the invention

[0005] The invention provides a special interlocking device for environmentally friendly gas-insulated switchgear, which is used to solve the defects in the prior art.

[0006] The present invention is achieved through the following technical solutions:

[0007] A special interlocking device for environmentally friendly gas-insulated switchgear comprises a vertical connecting rod and a locking rod extending downward, an interlocking plate sliding laterally along a circuit breaker operating mechanism box, and an isolating switch lever and an interlocking plate moving synchronously; the vertical connecting rod is fixedly connected to the opening and closing switch lever, and the locking rod is fixedly connected to the opening and closing switch lever via a horizontal connecting rod; a support plate is fixedly connected to the top surface of the interlocking plate, a groove is provided on the support plate, and a slot is also provided on the interlocking plate; when the vertical connecting rod is inserted into the groove, the locking rod is inserted into the slot.

[0008] During use of the present application, first, the isolating switch is in the initial position, and the locking rod is opposite to the slot. Among them, the five electrical protection requirements are that the isolating switch cannot be operated when the switch device is in the closed state. The process of implementing this requirement is: the opening and closing switch lever moves downward, driving the vertical connecting rod and the transverse connecting rod to move downward synchronously, and the downward movement of the transverse connecting rod drives the locking rod to move downward, thereby causing the vertical connecting rod and the locking rod to move downward. When the vertical connecting rod is inserted into the groove, the locking rod is inserted into the slot, thereby preventing the interlocking plate from moving horizontally. Since the isolating switch lever moves synchronously with the interlocking plate, the isolating switch lever is prevented from moving.

[0009] When the opening and closing switch lever moves to the opening position, the disconnecting switch lever moves away from the initial position, and the interlocking plate moves synchronously with the disconnecting switch lever, so that the groove and the vertical connecting rod are offset, so that the support plate can prevent the vertical connecting rod from moving downward, thereby preventing the opening and closing switch lever from closing.

[0010] As a preference, it also includes the support bent plate and the first pin, the support bent plate includes a horizontal plate, a vertical plate vertically connected to both ends of the horizontal plate, and a connecting plate vertically connected to the upper end of the vertical plate and extending in opposite directions, the connecting plate is fixedly connected to the circuit breaker operating box by bolts, and the horizontal plate is respectively provided with guide grooves for the vertical connecting rod and the locking rod to pass through; the interlocking plate is horizontally provided with a first slide groove, the horizontal plate is provided with a first pin hole, and the first pin hole is fixedly connected with the first slide groove, the interlocking plate is supported by the lower end cover of the first pin, and the support bent plate is provided with a through groove for the support plate to pass through along its connecting plate, vertical plate and horizontal plate. Wherein, under the limitation of the first pin and the first slide groove, the interlocking plate slides horizontally along the horizontal plate, and the horizontal plate is fixedly connected to the circuit breaker operating box through the vertical plate and the connecting plate, so as to realize the sliding fit of the interlocking plate along the circuit breaker operating box.

[0011] As a preferred embodiment, the invention further comprises the swing rod, the second pin vertically connected to the front end of the swing rod, the third pin vertically connected to the rear end of the swing rod, the second slide groove is also horizontally provided on the horizontal plate, the fourth pin vertically connected to the swing rod and passing through the second slide groove, the isolating switch lever is longitudinally provided with a strip groove through which the second pin passes; the horizontal plate is provided with an arc groove along the swinging track of the rear end of the swing rod, the interlocking plate is longitudinally provided with a longitudinal groove, the lower end of the third pin passes through the arc groove and the longitudinal groove in sequence and is fixedly connected to the corresponding end of the swing rod. The isolating switch lever is moved laterally. Since the isolating switch lever is provided with a strip groove along its longitudinal direction and the second pin passes through it, the lateral movement of the isolating switch lever drives the lever to swing along the fourth pin connection point, thereby driving the third pin to swing in the arc groove. Since the third pin passes through the longitudinal groove, the swing of the third pin drives the lateral movement of the interlocking plate.

[0012] Preferably, the horizontal plate, vertical plate and connecting plate are of an integrated structure and have arc-shaped chamfers at the corner connections.

[0013] Preferably, the support plate is obtained by bending the left rear plate of the interlocking plate upwards, and the right rear and left front of the interlocking plate are notches, which can reduce the total mass of the interlocking plate, thereby making the interlocking plate easier to operate.

[0014] Preferably, the groove is a V-shaped structure and a roller rolling along the inner wall of the groove is installed at the lower end of the vertical connecting rod, so that the vertical connecting rod can slide into and out of the groove conveniently.

[0015] The beneficial effects of the present invention are as follows: the use of the present application, while satisfying the premise that "when the opening and closing switch is closed, the isolating switch lever is prohibited from moving horizontally, and when the isolating switch lever moves horizontally, the closing of the opening and closing switch is prohibited", is not only simple in structure and smooth in operation, but also easy to install on environmentally friendly gas-insulated switchgear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of the opening state of the present invention;

[0018] Figure 2 This is a schematic diagram of the mechanism in the closing state of the present invention;

[0019] Figure 3 It is a schematic diagram of the interlocking plate structure;

[0020] Figure 4 is a schematic diagram of the supporting bent plate structure;

[0021] Figure 5 Schematic diagram of the pendulum structure.

[0022] As shown in the figure:

[0023] 1. Vertical connecting rod, 2. Lock rod, 3. Interlocking plate, 4. Opening and closing switch lever, 5. Disconnecting switch lever, 6. Support plate, 7. Groove, 8. Slot, 9. Rocker, 10. Strip groove, 11. Arc groove, 12. Longitudinal groove, 13. Support bent plate, 14. Guide groove, 15. First slide groove, 16. Pass-through groove, 17. Roller, 18. First pin hole, 19. Second pin hole, 20. Third pin hole, 21. Transverse connecting rod, 1301, transverse plate, 1302, vertical plate, 1303, connecting plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] A special interlocking device for environmentally friendly gas-insulated switchgear, such as Figure 1-5 As shown. It includes a support bent plate 13, an interlocking plate 3, a swing rod 9, a vertical connecting rod 1 and a transverse connecting rod 21. The vertical connecting rod 1 is vertically fixedly connected to the opening and closing switch lever 4 downward. The opening and closing switch lever 4 is fixedly connected to the locking rod 2 through the transverse connecting rod 21. The locking rod 2 is parallel to the vertical connecting rod 1. The support bent plate 13 includes a transverse plate, a vertical plate vertically connected to both ends of the transverse plate, and a connecting plate vertically connected to the upper end of the vertical plate and extending in opposite directions. The transverse plate, the vertical plate and the connecting plate are an integrated structure and are arc-shaped chamfered at the corner connection. The guide grooves 14 for the vertical connecting rod 1 and the locking rod 2 to pass through are respectively opened on the transverse plate 1301. The connecting plate is fixedly connected to the circuit breaker operating box by bolts.

[0026] The interlocking plate 3 is located below the connecting plate and a first slide groove 15 is horizontally provided on the top surface of the interlocking plate 3. Two first pin holes 18 are provided on the horizontal plate. The upper end of the first pin passes through the first slide groove 15 and the corresponding first pin hole 18 and is fixedly connected in the first pin hole 18 by a nut. The diameter of the first pin end cover is larger than the width of the first slide groove 15.

[0027] The top surface of the interlocking plate 3 is fixedly connected to a support plate 6, on which a groove 7 is provided, and on which a slot 8 is also provided. The lateral distance between the vertical connecting rod 1 and the locking rod 2 is equal to the distance between the groove 7 and the through slot, and when the opening and closing switch lever 4 is open, the upper end of the vertical connecting rod 1 is located above the support plate, and the locking rod 2 is located above the slot 8.

[0028] The support bent plate 13 is provided with a passing groove 16 through which the support plate passes along its connecting plate 1303, the vertical plate 1302 and the horizontal plate 1301, and a second sliding groove is also provided on the horizontal plate.

[0029] The front end and rear end of the swing rod 9 are respectively provided with a second pin hole 19 and a third pin hole 20, and the second pin hole 19 and the third pin hole 20 are respectively vertically connected downwardly with a second pin and a third pin, and the fourth pin is located between the second pin and the third pin. The fourth pin passes through the second slide slot from bottom to top and is vertically connected to the swing rod, and the width of the second slide slot is smaller than the diameter of the end cover of the fourth pin. The lever of the disconnector 5 is longitudinally provided with a strip groove 10 through which the second pin passes; the horizontal plate is provided with an arc groove 11 along the swinging track of the rear end of the swing rod 9, and the interlocking plate 3 is longitudinally provided with a longitudinal groove 12, and the lower end of the third pin passes through the arc groove 11 and the longitudinal groove 12 in sequence and is fixedly connected to the corresponding end of the swing rod 9.

[0030] During use of the present application, first, the isolating switch is in the initial position, and the locking rod 2 is opposite to the slot 8. Among them, the electrical five protection requirements are that the isolating switch 5 cannot be operated when the switch device is in the closed state. The implementation process of this requirement is: the switching switch lever 4 moves downward, driving the vertical connecting rod 1 and the transverse connecting rod 21 to move downward synchronously, and the downward movement of the transverse connecting rod 2 drives the downward movement of the locking rod 2, thereby causing the vertical connecting rod 1 and the locking rod 2 to move downward. When the vertical connecting rod 1 is inserted into the groove 7, the locking rod 2 is inserted into the through groove, thereby preventing the interlocking plate 3 from moving laterally. Since the second pin is inserted into the strip groove 10 on the isolating switch 5 lever, and the third pin is inserted into the arc groove 11 and the longitudinal groove 12, therefore, when the interlocking plate 3 cannot move, the longitudinal groove 12 on the interlocking plate 3 restricts the third pin from moving laterally, thereby restricting the rocker arm 9 from moving, thereby restricting the isolating switch from moving through the rocker arm 9.

[0031] When the opening and closing switch lever 4 moves to the opening position, the vertical connecting rod 1 moves to above the support plate, and then the isolating switch 5 lever is moved to leave its initial position. The movement of the isolating switch 5 lever drives the front end of the rocker rod 9 to swing, and then drives the rear end of the rocker rod 9 to swing, thereby driving the third pin to slide in the arc groove 11. When the third pin slides, it can drive the interlocking plate 3 to move, so that the groove 7 of the interlocking plate 3 is staggered with the vertical connecting rod 1, thereby preventing the vertical connecting rod 1 from moving into the groove 7, so that the opening and closing switch lever 4 cannot be closed.

[0032] The support plate 6 is obtained by bending the left rear plate of the interlocking plate 3 upward, and the right rear and left front of the interlocking plate 3 are notches. The total mass of the interlocking plate 3 can be reduced, so that the interlocking plate 3 can be operated more lightly.

[0033] The groove 7 is a V-shaped structure and the lower end of the vertical connecting rod 1 is provided with a roller 17 that rolls along the inner wall of the groove 7. The vertical connecting rod 1 can slide in and out of the groove 7 conveniently.

[0034] The use of the present application, under the premise of satisfying the requirement that "when the opening and closing switch is closed, the lever of the isolating switch 5 is prohibited from moving horizontally, and when the isolating switch lever moves horizontally, the closing of the opening and closing switch is prohibited", is not only simple in structure and smooth in operation, but also easy to install on environmentally friendly gas-insulated switchgear.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A special interlocking device for environmentally friendly gas-insulated switchgear, characterized in that: It includes a vertical connecting rod and a locking rod arranged vertically, and an interlocking plate sliding horizontally along the circuit breaker operating mechanism box, and the disconnector lever moves synchronously with the interlocking plate; the vertical connecting rod is fixedly connected to the opening and closing switch lever, and the locking rod is fixedly connected to the opening and closing switch lever via the horizontal connecting rod; the top surface of the interlocking plate is fixedly connected to a support plate, the support plate is provided with a groove, and the interlocking plate is also provided with a slot; when the vertical connecting rod is inserted into the groove, the locking rod is inserted into the slot, including a support bent plate and a first pin, the support bent plate includes a horizontal plate, a vertical plate vertically connected to both ends of the horizontal plate, and a connecting plate vertically connected to the upper end of the vertical plate and extending in opposite directions, the connecting plate is fixedly connected to the circuit breaker operating box by bolts, and the horizontal plate is respectively provided with guide grooves for the vertical connecting rod and the locking rod to pass through; The lock plate is provided with a first slide groove horizontally, and a first pin hole is provided on the horizontal plate. A first pin passing through the first slide groove is fixedly connected in the first pin hole. The interlocking plate is supported by the lower end cover of the first pin. The supporting bent plate is provided with an outlet groove through which the supporting plate passes along its connecting plate, vertical plate and horizontal plate. It also includes a swing rod, a second pin vertically connected to the front end of the swing rod, and a third pin vertically connected to the rear end of the swing rod. A second slide groove is also horizontally provided on the horizontal plate, and a fourth pin passing through the second slide groove is vertically connected to the swing rod. A strip groove through which the second pin passes is longitudinally provided on the isolating switch lever; an arc groove is provided on the horizontal plate along the swinging trajectory of the rear end of the swing rod, and a longitudinal groove is longitudinally provided on the interlocking plate. The lower end of the third pin passes through the arc groove and the longitudinal groove in sequence and is fixedly connected to the corresponding end of the swing rod.

2. The interlocking device for environmentally friendly gas-insulated switchgear according to claim 1 is characterized in that: The horizontal plate, the vertical plate and the connecting plate are of an integrated structure and have arc-shaped chamfers at the corner connections.

3. The interlocking device for environmentally friendly gas-insulated switchgear according to claim 2 is characterized in that: The supporting plate is obtained by bending the left rear plate of the interlocking plate upwards, and the right rear and left front of the interlocking plate are notches.

4. The interlocking device for environmentally friendly gas-insulated switchgear according to claim 1 is characterized in that: The groove is a V-shaped structure and a roller rolling along the inner wall of the groove is installed at the lower end of the vertical connecting rod.

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