Five-prevention structure of upper-isolation-mode double-electric three-position isolation switch

Abstract

A five-prevention structure of a double-electric three-position disconnecting switch in an upper isolation mode comprises a front structural plate, a middle structural plate and an interlocking supporting plate which are connected through supporting columns. An isolation transmission shaft and a grounding transmission shaft which are driven by corresponding motors, an isolation output shaft driven by the isolation transmission shaft, a grounding output shaft driven by the grounding transmission shaft, and a mechanism output shaft which can be respectively controlled by the isolation output shaft and the grounding output shaft are coupled between the front structural plate and the middle structural plate; one-way limiting assemblies enabling the isolation transmission shaft and the grounding transmission shaft to only rotate anticlockwise are arranged between the isolation transmission shaft and the motor and between the grounding transmission shaft and the motor, and an interlocking shifting plate rotating along with the mechanism output shaft is arranged on the mechanism output shaft. The interlocking support plate is provided with a movable isolation interlocking sheet, a grounding interlocking sheet and a circuit breaker interlocking sheet.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a five-protection structure of a double-electric three-station isolating switch in an upper isolation mode. Background Art

[0002] The three-position isolating switch is one of the core components of the inflatable cabinet and occupies an important position in the distribution network system. The three-position isolating switch combines the functions of the isolating switch and the grounding switch into one, realizing the function of switching between the three positions of connection, isolation and grounding.

[0003] Publication (Announcement) No.: CN112309759A discloses a universal three-station isolation mechanism, including a frame; a mechanism output shaft, mounted on the frame, and a first main dial plate is provided on the mechanism output shaft; an isolation operating shaft, mounted on the frame and located on a first side of the mechanism output shaft, and an isolation dial plate is provided on the isolation operating shaft; a grounding operating shaft, mounted on the frame and located on a second side of the mechanism output shaft, and a grounding dial plate is provided on the grounding operating shaft; a separation and combination spring assembly, two ends of which are respectively connected to the isolation operating shaft and the grounding operating shaft, and are respectively movably connected to the isolation dial plate and the grounding dial plate; a first limit assembly, which is arranged on the frame and located at two ends of the separation and combination spring assembly; a first curved connecting plate, a first end of which is connected to the first main dial plate, and a second end of the first curved connecting plate is rotatably connected to the isolation dial plate; a second curved connecting plate, a first end of which is connected to the first main dial plate, and a second end of the second curved connecting plate is rotatably connected to the grounding dial plate; a main crank arm plate, mounted on the first end of the mechanism output shaft, the main crank arm plate is rotatably connected to the main connecting plate, and is connected to a dynamic fit through the main connecting plate. The interlocking plate of this three-station isolation mechanism can only selectively block one of the isolation operation hole or the grounding operation hole, which still poses a risk of misoperation and the improved safety is relatively limited. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides a five-proof knot of a double-electric three-position isolating switch with an upper isolation mode to solve the above-mentioned problems.

[0005] The utility model adopts a technical solution to solve the technical problem: the five-protection structure of the double-electric three-position isolating switch in the upper isolation mode comprises a front structure plate, a middle structure plate, and an interlocking support plate connected by pillars, an isolation transmission shaft and a grounding transmission shaft driven by corresponding motors, an isolation output shaft driven by the isolation transmission shaft, a grounding output shaft driven by the grounding transmission shaft, and a mechanism output shaft that can be controlled by the isolation output shaft and the grounding output shaft respectively, and a connection between the isolation transmission shaft and the motor, and between the grounding transmission shaft and the motor. A one-way limiting component is arranged between them so that the isolation transmission shaft and the grounding transmission shaft can only rotate counterclockwise. An interlocking plate is arranged on the output shaft of the mechanism and rotates with it. A movable isolation interlocking plate, a grounding interlocking plate, and a circuit breaker interlocking plate are arranged on the interlocking support plate. The isolation interlocking plate or the grounding interlocking plate is driven by the interlocking plate and chooses to block the isolation operation hole or the grounding operation hole when blocking. The circuit breaker interlocking plate is driven by the circuit breaker mechanism so that the isolation interlocking plate and the grounding interlocking plate are in the state of blocking the isolation operation hole and the grounding operation hole at the same time.

[0006] To be further improved, the one-way limiting component includes a one-way disk and a limit arm. The one-way disk is arranged on the isolation transmission shaft or the ground transmission shaft, and its outer peripheral surface has lateral protrusions distributed along its circumferential direction. A limit groove is formed between adjacent side lateral protrusions. The limit arm is swingably arranged on the motor, and a limit protrusion placed in the limit groove is arranged at its lower end.

[0007] For further improvement, an inclined surface sloping from the upper outside to the lower inside is provided on the outer side surface of the lateral protrusion, and the inclined surface enables the lateral protrusion to form a local closed space that can be used as a limiting groove.

[0008] Further improvement, the configuration of the limiting protrusion is consistent with the configuration of the limiting groove.

[0009] For further improvement, the interlocking plate is bent into two parts, one part is a connecting part arranged on the output shaft of the mechanism, and the other part is a toggle part used to toggle the isolation interlocking plate or the grounding interlocking plate.

[0010] For further improvement, the interlocking support plate is provided with a first guide bolt, a second guide bolt, and a third guide bolt on the same vertical horizontal line. The first guide bolt and the second guide bolt are used together to guide the movement of the isolation interlocking plate and the grounding interlocking plate, and the third guide bolt is used to guide the movement of the circuit breaker interlocking plate.

[0011] To further improve the structure, the isolation interlocking plate and the grounding interlocking plate jointly arranged on the first guide bolt and the second guide bolt are arranged in a front-rear staggered manner.

[0012] To further improve, the upper and lower ends of the circuit breaker interlocking piece, the lower end of the isolation interlocking piece, and the lower end of the grounding interlocking piece are all provided with inwardly bent contact parts, and the circuit breaker interlocking piece contacts the contact part of the isolation interlocking piece and the contact part of the grounding interlocking piece through the contact part when the circuit breaker mechanism is closed.

[0013] The beneficial effects of the utility model are:

[0014] The three-position isolating switch of the utility model is provided with five protective structures, so that the operational safety of the three-position isolating switch is improved through the setting of the five protections, and there is no hidden danger of misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the one-way limiting component of the utility model;

[0017] Figure 3 It is a schematic diagram of the state of the isolation of the utility model;

[0018] Figure 4 This is a schematic diagram of the isolated and closed state of the utility model;

[0019] Figure 5 This is a schematic diagram of the grounding state of the utility model;

[0020] Figure 6 It is a schematic diagram of the closed state of the circuit breaker of the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] See attached Figure 1-2The five-protection structure of the double-electric three-position isolating switch of the upper isolation mode comprises a front structure plate 1, a middle structure plate 2, and an interlocking support plate 3 connected by pillars, an isolation transmission shaft 5 and a grounding transmission shaft 6 driven by a corresponding motor 4 are axially connected between the front structure plate 1 and the middle structure plate 2, an isolation output shaft 7 driven by the isolation transmission shaft 5, a grounding output shaft 8 driven by the grounding transmission shaft 6, and a mechanism output shaft 9 which can be controlled by the isolation output shaft 7 and the grounding output shaft 8 respectively, and a mechanism output shaft 9 is arranged between the isolation transmission shaft 5 and the motor 4, and between the grounding transmission shaft 6 and the motor 4 so that the isolation transmission shaft 5 and the grounding transmission shaft 6 can only realize the one-way limiting component 10 of counterclockwise rotation, the mechanism output shaft 9 is provided with an interlocking plate 91 which rotates with it, the interlocking support plate 3 is provided with a movable isolation interlocking piece 20, a grounding interlocking piece 30, and a circuit breaker interlocking piece 40, the isolation interlocking piece 20 or the grounding interlocking piece 30 are driven by the interlocking plate 91 and choose to block the isolation operation hole or the grounding operation hole when blocking, and the circuit breaker interlocking piece 40 is driven by the circuit breaker mechanism so that the isolation interlocking piece 20 and the grounding interlocking piece 30 are in the state of blocking the isolation operation hole and the grounding operation hole at the same time. The principle of the utility model is that the one-way limiting component 10 allows the shaft rotation direction of the two motors 4 used to drive the isolation transmission shaft 5 and the grounding transmission shaft 6 to only rotate counterclockwise, and each one-way limiting component 10 is one protection, that is, two are two protections. The isolation interlocking plate 20 blocks the isolation operation hole when the three-position isolation switch is in the grounding closing position to avoid misoperation of the isolation transmission shaft 5 during manual operation. This method is also one of the protections. The grounding interlocking plate 30 docks when the three-position isolation switch is in the isolation closing position. The grounding operation hole is blocked to avoid accidental operation of the grounding transmission shaft 5 during manual operation. This method is also one of the protections. When the circuit breaker mechanism is closed, the circuit breaker interlocking piece 40 simultaneously drives the isolation interlocking piece 20 and the grounding interlocking piece 30 to block the isolation operation hole and the grounding operation hole. In this way, when the three-position disconnector needs to be opened, the three-position disconnector can be operated only after the circuit breaker is opened. This method is also one of the protections. The operating safety of the three-position disconnector is improved through the setting of these five protections, and there is no hidden danger of misoperation.

[0023] The one-way limiting component 10 includes a one-way disk 101 and a limiting arm 102. The one-way disk 101 is arranged on the isolation transmission shaft 5 or the ground transmission shaft 6, and has a lateral protrusion 101-a distributed along its circumferential direction on its outer peripheral surface. A limiting groove 101-a1 is formed between adjacent side lateral protrusions 101-a. The limiting arm 102 is swingably arranged on the motor 4, and a limiting protrusion 102-a placed in the limiting groove 101-a1 is arranged at its lower end. The one-way disk 101 follows the rotation of the isolation transmission shaft 5 or the ground transmission shaft 6, and in order to make the shaft rotation direction of the motor 4 only counterclockwise, the lateral protrusion 101-a is used to form the limiting groove 101-a1, and then the limiting protrusion 102-a is used to cooperate with the limiting groove 101-a1 to realize this rotation limiting function.

[0024] An inclined surface 101-a2 inclined from the outside to the inside is provided on the outer side of the lateral protrusion 101-a, and the inclined surface 101-a2 enables the lateral protrusion 101-a to form a local closed space that can be used as a limiting groove 101-a1. The inclined surface 101-a2 makes the overall volume of the lateral protrusion 101-a smaller, and also enables a local closed space to be formed between adjacent side lateral protrusions 101-a, that is, the limiting groove 101-a1 is obtained, and the configuration of the limiting groove 101-a1 is a triangular configuration, that is, the inclined surface 101-a2 is a triangular inclined surface. The upper surface of the adjacent lateral protrusion 101-a is the short axis surface 101-a3 of the triangle, while the long axis surface of the triangle cannot be reflected because the limiting groove 101-a1 is a locally closed space. The short axis surface 101-a3 of the triangle serves as a blocking surface, that is, when the one-way disk 101 rotates clockwise, the short axis surface 101-a3 of the triangle will abut against the bottom surface of the limiting protrusion 102-a, and the abutment makes it impossible to drive the limiting arm 102 to swing, so that the limiting protrusion 102-a will not separate from the limiting groove 101-a1, thereby preventing the user from misoperating the shaft rotation direction of the motor 4.

[0025] The configuration of the limiting protrusion 102-a is consistent with the configuration of the limiting groove 101-a1. Such a setting makes the limiting protrusion also a triangular configuration, that is, the triangular inclined surface 102-a1 of the limiting protrusion 102-a serves as a guide surface for the lateral protrusion 101-a to drive the limiting arm 102 to swing, and the short axis surface 102-a2 of the limiting protrusion 102-a is the blocking surface abutting against the upper surface of the lateral protrusion 101-a.

[0026] The interlocking plate 91 is bent into two parts, one part is a connecting part 91-a arranged on the mechanism output shaft 9, and the other part is a toggle part 91-b used to toggle the isolation interlocking plate 20 or the grounding interlocking plate 30. Such a setting can install the interlocking plate 91 on the mechanism output shaft 9, and also enables the interlocking plate 91 to toggle the isolation interlocking plate 20 or the grounding interlocking plate 30, and the structure is simple, and no additional components are required.

[0027] The interlocking support plate 3 is provided with a first guide bolt 31, a second guide bolt 32, and a third guide bolt 33 on the same vertical horizontal line. The first guide bolt 31 and the second guide bolt 32 are used together to guide the isolation interlocking plate 20 and the grounding interlocking plate 30 to move, and the third guide bolt 33 is used to guide the circuit breaker interlocking plate 40 to move. The first guide bolt 31, the second guide bolt 32, and the third guide bolt 33 are used to guide the isolation interlocking plate 20, the grounding interlocking plate 30, and the circuit breaker interlocking plate 40 to move, that is, the isolation interlocking plate 20, the grounding interlocking plate 30, and the circuit breaker interlocking plate 40 are provided with guide grooves for the guide bolts to pass through, and the guidance is achieved by the cooperation between the groove and the rod, and the guide bolt also has the function of fixing these interlocking plates, that is, it is achieved by the thickness of the matching interlocking plate formed between the cap portion whose size is larger than the guide groove size and the surface of the interlocking support plate 3, but the cap portion of the guide bolt will not completely block the interlocking plate.

[0028] The isolation interlocking plate 20 and the grounding interlocking plate 30 which are jointly arranged on the first guide bolt 31 and the second guide bolt 32 are staggered in the front and rear. Such an arrangement allows the isolation interlocking plate 20 and the grounding interlocking plate 30 to move guided by the first guide bolt 31 and the second guide bolt 32 at the same time, so that the isolation interlocking plate 20 and the grounding interlocking plate 30 are overlapped together.

[0029] The upper and lower ends of the circuit breaker interlocking piece 40, the lower end of the isolation interlocking piece 20, and the lower end of the grounding interlocking piece 30 are all provided with inwardly bent contact portions 50. When the circuit breaker mechanism is closed, the circuit breaker interlocking piece 40 contacts the contact portion 50 of the isolation interlocking piece 20 and the contact portion 50 of the grounding interlocking piece 30 through the contact portion 50. The contact portion 50 is actually a sheet body, that is, an integral part obtained by bending these interlocking pieces. The purpose is to increase the contact area, so that the circuit breaker interlocking piece 40 can simultaneously drive the isolation interlocking piece 20 and the grounding interlocking piece 30 to move synchronously in the direction of the shielding operation hole.

[0030] See attached Figure 3 : The interlock is in the initial position, the isolation / grounding operation hole is not blocked and the isolation / grounding switch can be operated.

[0031] See attached Figure 4 : Isolation closed position, interlock is in the locked grounding position. When the isolating switch is closed, the mechanism output shaft 9 rotates counterclockwise, and the interlocking plate 91 on the mechanism output shaft 9 lifts the grounding interlocking plate 30 to lock the grounding operation hole. At this time, the isolating switch can only be operated to open to prevent misoperation.

[0032] See attached Figure 5: The interlock is in the locked isolation position. When the grounding switch is closed, the mechanism output shaft 9 rotates clockwise, and the interlocking plate 91 on the mechanism output shaft 9 lifts the isolation interlocking plate 20 to lock the isolation operation hole. At this time, the grounding switch can only be operated to open to prevent misoperation.

[0033] See attached Figure 6 :The circuit breaker is in the closed position, and the interlock is in the locked three-position mechanism position. When the circuit breaker switch is closed, the circuit breaker interlocking piece 40 is lifted up and drives the isolation interlocking piece 20 and the grounding interlocking piece 30 to move upward synchronously, locking the isolation and grounding operation holes. At this time, the three-position mechanism can only be operated when the circuit breaker is opened, which is in line with the operation logic of the upper isolation circuit breaker: when power is supplied, first close the isolation and then close the circuit breaker to complete the power supply. When repairing, first open the circuit breaker, open the isolation, then close the grounding and close the circuit breaker to complete a complete grounding circuit.

[0034] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A five-protection structure of a double-electric three-position isolating switch in an upper isolation mode, comprising a front structure plate (1), a middle structure plate (2), and an interlocking support plate (3) connected by pillars, characterized in that: An isolation transmission shaft (5) and a ground transmission shaft (6) driven by corresponding motors (4), an isolation output shaft (7) driven by the isolation transmission shaft (5), a ground output shaft (8) driven by the ground transmission shaft (6), and a mechanism output shaft (9) respectively controllable by the isolation output shaft (7) and the ground output shaft (8) are axially connected between the front structure plate (1) and the middle structure plate (2); and a one-way limiting shaft is provided between the isolation transmission shaft (5) and the motor (4), and between the ground transmission shaft (6) and the motor (4) so ​​that the isolation transmission shaft (5) and the ground transmission shaft (6) can only rotate counterclockwise. A fixed assembly (10), wherein an interlocking plate (91) rotating with the mechanism output shaft (9) is provided, and the interlocking support plate (3) is provided with a movable isolation interlocking piece (20), a grounding interlocking piece (30), and a circuit breaker interlocking piece (40), wherein the isolation interlocking piece (20) or the grounding interlocking piece (30) is driven by the interlocking plate (91) and blocks the isolation operation hole or the grounding operation hole when blocking, and the circuit breaker interlocking piece (40) is driven by the circuit breaker mechanism so that the isolation interlocking piece (20) and the grounding interlocking piece (30) are in a state of blocking the isolation operation hole and the grounding operation hole at the same time.

2. The five-protection structure of the upper isolation double electric three-position isolating switch according to claim 1 is characterized in that: The one-way limiting component (10) comprises a one-way disc (101) and a limiting arm (102); the one-way disc (101) is arranged on the isolation transmission shaft (5) or the ground transmission shaft (6); its outer peripheral surface has lateral protrusions (101-a) distributed along its circumferential direction; a limiting groove (101-a1) is formed between two adjacent lateral protrusions (101-a); the limiting arm (102) is swingably arranged on the motor (4); its lower end is provided with a limiting protrusion (102-a) placed in the limiting groove (101-a1).

3. The five-protection structure of the upper isolation double electric three-position isolating switch according to claim 2 is characterized in that: The outer side surface of the lateral protrusion (101-a) is provided with an inclined surface (101-a2) inclined from the outside to the inside, and the inclined surface (101-a2) enables the lateral protrusion (101-a) to form a local closed space that can be used as the limiting groove (101-a1).

4. The five-protection structure of the upper isolation double electric three-position isolating switch according to claim 3 is characterized in that: The configuration of the limiting protrusion (102-a) is consistent with the configuration of the limiting groove (101-a1).

5. The five-protection structure of the upper isolation double electric three-position isolating switch according to claim 1 is characterized in that: The interlocking plate (91) is bent into two parts, one part is a connecting part (91-a) arranged on the mechanism output shaft (9), and the other part is a toggling part (91-b) used to toggle the isolation interlocking plate (20) or the grounding interlocking plate (30).

6. The five-protection structure of the upper isolation double electric three-position isolating switch according to claim 1 is characterized in that: The interlocking support plate (3) is provided with a first guide bolt (31), a second guide bolt (32), and a third guide bolt (33) on the same vertical horizontal line; the first guide bolt (31) and the second guide bolt (32) are used together to guide the movement of the isolation interlocking plate (20) and the grounding interlocking plate (30); and the third guide bolt (33) is used to guide the movement of the circuit breaker interlocking plate (40).

7. The five-protection structure of the upper isolation double electric three-position isolating switch according to claim 6 is characterized in that: The isolation interlocking plate (20) and the grounding interlocking plate (30) which are jointly arranged on the first guide bolt (31) and the second guide bolt (32) are arranged in a front-rear staggered manner.

8. The five-protection structure of the upper isolation double electric three-position isolating switch according to claim 6 is characterized in that: The upper and lower ends of the circuit breaker interlocking piece (40), the lower end of the isolation interlocking piece (20), and the lower end of the grounding interlocking piece (30) are all provided with inwardly bent contact portions (50), and the circuit breaker interlocking piece (40) is in contact with the contact portion (50) of the isolation interlocking piece (20) and the contact portion (50) of the grounding interlocking piece (30) through the contact portion (50) when the circuit breaker mechanism is closed.

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