Five-prevention interlocking three-station circuit breaker

Abstract

The utility model provides a five-prevention interlocking three-station circuit breaker, which belongs to the technical field of three-station circuit breakers and comprises an isolation main shaft, a circuit breaker main shaft, a solid-sealed polar pole, an isolation operation shaft and a circuit breaker linkage shaft, the isolation operation shaft and the circuit breaker linkage shaft are located between the upper end and the lower end of the solid-sealed polar pole in the height direction. According to the utility model, the isolation operation shaft and the circuit breaker linkage shaft are arranged close to each other, and the overall size of the operation mechanism is reduced, so that the overall size of the three-station circuit breaker is reduced, and the development of miniaturization and light weight of the three-station circuit breaker is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of three-position circuit breakers, in particular to a three-position circuit breaker with five-protection interlocking. Background Art

[0002] In high-voltage complete electrical equipment, the safety protection for disconnectors, vacuum contactors, vacuum circuit breakers, metering carts, and cabinet doors is usually called the five protections. As we all know, the main circuit is composed of disconnectors, vacuum contactors, and high-voltage loads. In the main circuit system, the cabinet doors, vacuum contactors, and disconnectors must be interlocked to reflect the above five protections. The specific connotations of the five protections are: 1. Prevent opening or closing of loads; 2. Prevent mis-opening or closing of disconnectors; 3. Prevent mis-closing of grounding switches when closed; 4. Prevent mis-closing of grounding switches when energized; 5. Prevent mis-entering of energized gaps.

[0003] The three-position circuit breaker of the prior art generally includes an electrical room and an operating room. The electrical room is provided with a sealed pole, an isolating spindle, a circuit breaker spindle and a grounding spindle. The rotation of the isolating spindle controls the opening and closing of the isolating switch, the rotation of the circuit breaker spindle controls the opening and closing of the sealed pole, and the rotation of the grounding spindle controls the opening and closing of the grounding switch. In the operating room, an isolating operating shaft, a circuit breaker operating shaft and a grounding operating shaft are provided corresponding to the isolating spindle, the circuit breaker spindle and the grounding spindle. Of course, the operating shaft may also be formed by one end of the spindle extending into the operating room, and a five-protection interlocking mechanism is provided between each operating shaft and the cabinet door. At present, the isolating operating shaft and the circuit breaker spindle are connected to each other. The operating axis of the device is generally arranged at the upper and lower ends of the sealed pole, and there is a large distance between the two, which causes the five-protection interlocking mechanism to occupy a large space, thereby increasing the overall volume of the three-position circuit breaker. For example, the interlocking mechanism of the upper isolation and lower circuit breaker ring network cabinet disclosed in the patent with publication number CN216487827U, and the three-position circuit breaker disclosed in the patent with publication number CN203134675U, both have this problem, which does not meet the requirements of the miniaturization and lightweight development of the three-position circuit breaker design for indoor and outdoor power supply designed in most urban power supply networks due to land shortage. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a three-position circuit breaker with five-protection interlocking.

[0005] The technical solution adopted by the utility model is as follows: a three-position circuit breaker with five-protection interlocking, including an isolation main shaft, a circuit breaker main shaft and a sealed pole, and also including an isolation operating shaft and a circuit breaker linkage shaft arranged closely together, wherein the isolation operating shaft and the circuit breaker linkage shaft are located between the upper end and the lower end of the sealed pole in the height direction.

[0006] In some embodiments, the circuit breaker main shaft is arranged in the middle of the height direction of the sealed pole, the circuit breaker linkage shaft is coaxially connected to the circuit breaker main shaft, and in the height direction of the sealed pole, the isolation operating shaft is arranged below the isolation main shaft and close to the circuit breaker linkage shaft.

[0007] In some embodiments, the sealed pole includes a moving end conductive rod, and a first transmission assembly is arranged between the moving end conductive rod and the circuit breaker main shaft, and the first transmission assembly includes: a circuit breaker swing arm, which is arranged on the circuit breaker main shaft and rotates synchronously with the circuit breaker main shaft; a circuit breaker rocker arm, the middle part of which is hinged to the lower end of the sealed pole, and one end of which is hinged to the moving end conductive rod; and a circuit breaker pull rod, one end of which is hinged to the other end of the circuit breaker rocker arm, and the other end of which is hinged to the circuit breaker swing arm.

[0008] In some embodiments, a second transmission assembly is arranged between the isolation main shaft and the isolation operating shaft, and the second transmission assembly includes: a first isolation swing arm, which is arranged on the isolation main shaft and rotates synchronously with the isolation main shaft; a second isolation swing arm, which is arranged on the isolation operating shaft and rotates synchronously with the isolation operating shaft; and an isolation connecting rod, wherein both ends of the isolation connecting rod are respectively hinged to the first isolation swing arm and the second isolation swing arm.

[0009] In some embodiments, it also includes: a grounding operating shaft; a grounding tube, the grounding tube is used for the operating handle to insert into the grounding operating shaft, the grounding tube is sleeved outside the grounding operating shaft, and a grounding locking groove is provided on the grounding tube; an isolating tube, the isolating tube is used for the operating handle to insert into the isolation operating shaft, the isolation operating shaft is sleeved outside the isolation operating shaft, and an isolation locking groove is provided on the isolating tube; upper and lower interlocking plates, the upper and lower interlocking plates are slidably arranged along the grounding locking groove and the isolation locking groove, the upper and lower interlocking plates are provided with an upper limit rod near the isolation operating shaft, and a lower limit rod is provided near the grounding operating shaft, the upper and lower interlocking plates have a third position and a fourth position, when the upper and lower interlocking plates are in the third position, the upper ends of the upper and lower interlocking plates extend into the isolating tube and the lower ends thereof do not extend into the grounding tube, when the upper and lower interlocking plates are in the third position, the upper ends of the upper and lower interlocking plates extend into the isolating tube and the lower ends thereof do not extend into the grounding tube, When in the fourth position, the upper ends of the upper and lower interlocking plates do not extend into the isolation tube and the lower ends thereof extend into the grounding tube; a manual shift rod, the manual shift rod is arranged on the upper and lower interlocking plates, and the manual shift rod is used to drive the upper and lower interlocking plates to switch between the third position and the fourth position; a grounding interlocking disk, the grounding interlocking disk rotates synchronously with the grounding operating shaft; a grounding limit plate, the grounding limit plate is arranged on the grounding interlocking disk and rotates with it, and when the upper and lower interlocking plates are in the third position, the grounding limit plate prevents the upper and lower interlocking plates from moving to the fourth position; an isolation interlocking disk, the isolation interlocking disk rotates synchronously with the isolation operating shaft; an isolation limit block, the isolation limit block is arranged on the isolation interlocking disk and rotates with it, and when the upper and lower interlocking plates are in the fourth position, the isolation limit block prevents the upper and lower interlocking plates from moving to the third position.

[0010] In some embodiments, it also includes: an isolation interlock pin, an isolation locking hole is provided on the isolation cylinder, the isolation interlock pin is slidably arranged along the isolation locking hole and has a first position and a second position, when the isolation interlock pin is in the first position, the isolation operating shaft is inoperable, and when the isolation interlock pin is in the second position, the isolation operating shaft is operable; a spring, the spring is used to maintain and reset the isolation interlock pin to the second position; a circuit breaker interlock paddle, the circuit breaker interlock paddle is arranged on the circuit breaker linkage shaft and rotates with it, and a linkage protrusion is arranged on it; and an isolation rotating rod, the middle part of the isolation rotating rod is rotatably arranged, and a first linkage column is provided at one end close to the circuit breaker linkage shaft, and the other end is connected to the isolation interlock pin, and the first linkage column is located on the rotation path of the linkage protrusion; wherein, when the linkage protrusion rotates with the circuit breaker linkage shaft, it will abut against the first linkage column to rotate the isolation rotating rod, thereby driving the isolation interlock pin to move from the second position to the first position.

[0011] In some embodiments, it also includes: a circuit breaker opening knob, a circuit breaker closing knob is provided with a synchronously rotating opening linkage plate, and one end of the opening linkage plate is located on the rotation path of the linkage protrusion; and a circuit breaker closing knob, a circuit breaker closing knob is provided with a synchronously rotating closing linkage plate, the isolation interlock disk is provided with a first limiting protrusion, a second linkage column is provided on the closing linkage plate near the circuit breaker interlocking paddle, a second limiting protrusion is provided on the closing linkage plate near the isolation interlock disk, the second linkage column is located on the rotation path of the linkage protrusion, and the second limiting protrusion is located on the rotation path of the first limiting protrusion.

[0012] In some embodiments, it also includes: a cabinet door interlock pin, a grounding locking hole is provided on the grounding tube, the cabinet door interlock pin is slidably arranged along the grounding locking hole and has a fifth position and a sixth position, when the cabinet door interlock pin is in the fifth position, the grounding operating shaft is inoperable, and when the grounding interlock pin is in the sixth position, the grounding operating shaft is operable; a cabinet door interlock plate, a first connecting column and a second connecting column are provided on the grounding interlock plate, the grounding limit plate is connected to the grounding interlock plate through the first connecting column, the cabinet door interlock plate is hinged to the second connecting column, and a card slot matched with the first connecting column is provided on the cabinet door interlock plate; and a cabinet door, a first opening is provided on the cabinet door corresponding to the cabinet door interlock pin, and a second opening is provided corresponding to the cabinet door interlock plate.

[0013] In some embodiments, it also includes: a grounding switch; an isolating switch; upper and lower limit plates, the middle parts of which are hingedly arranged, an upper cam is arranged near the isolating interlocking disk, and a lower cam is arranged near the grounding interlocking disk; the isolating interlocking disk is provided with a first cam groove and a first abutting protrusion adapted to the upper cam, and the grounding interlocking disk is provided with a second cam groove and a second abutting protrusion adapted to the lower cam; when the grounding switch is closed and the isolating switch is opened, the second abutting protrusion abuts against the lower cam, and the upper cam is snapped into the first cam groove, so that the isolating switch is restricted to the opened state; when the grounding switch is opened, the upper cam disengages from the first cam groove, and the lower cam disengages from the second cam groove, thereby releasing the restriction on the closing of the isolating switch; when the isolating switch is closed, the grounding switch is still opened, the upper cam abuts against the first abutting protrusion, and the lower cam is snapped into the second cam groove, so that the grounding switch is restricted to the opened state.

[0014] In some embodiments, an upper limit shaft and a lower limit shaft are also included, and an upper sliding hole is provided at one end of the upper limit plate close to the upper cam, and a lower sliding hole is provided at one end close to the lower cam, the upper limit shaft extends into the upper sliding hole, and the lower limit shaft extends into the lower sliding hole.

[0015] The beneficial effects of the utility model are as follows: in the utility model, the isolation operating shaft and the circuit breaker linkage shaft are arranged close to each other, which reduces the overall size of the operating mechanism, thereby reducing the overall size of the three-position circuit breaker, which is conducive to the development of miniaturization and lightweight of the three-position circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 A schematic diagram of a three-position circuit breaker with five-protection interlock in the utility model Figure 1 ;

[0018] Figure 2 A cross-sectional view of a three-position circuit breaker with five-protection interlocking in the utility model Figure 1 ;

[0019] Figure 3 A cross-sectional view of a three-position circuit breaker with five-protection interlocking in the utility model Figure 2 ;

[0020] Figure 4 It is a schematic diagram of the state 1 of the five-protection interlocking mechanism in the utility model;

[0021] Figure 5 It is a schematic diagram of the second state of the five-defense interlocking mechanism in the utility model;

[0022] Figure 6 It is a schematic diagram of the state 3 of the five-protection interlocking mechanism in the utility model;

[0023] Figure 7 It is a schematic diagram of the state 1 of the forced interlocking mechanism in the utility model;

[0024] Figure 8 It is a schematic diagram of the second state of the forced interlocking mechanism in the utility model;

[0025] Fig. 9 It is a schematic diagram of the third state of the forced interlocking mechanism in the utility model;

[0026] Fig.10 A schematic diagram of a three-position circuit breaker with five-protection interlock in the utility model Figure 2 . DETAILED DESCRIPTION

[0027] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0028] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0030] In addition, the terms "installed", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0031] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0033] Embodiment 1:

[0034] like Figures 1 to 6 As shown, a three-position circuit breaker with five-protection interlocking includes a frame, on which an electrical room 1 and an operating room 2 are arranged, so as to separate the two rooms, thereby preventing the electrical equipment in the electrical room 1 from being disconnected and causing the operating mechanism in the operating room 2 to be energized, thereby improving the safety performance.

[0035] Also includes:

[0036] The sealed pole 3 is three-phase and is connected in parallel in the electrical room 1. The sealed pole 3 with excellent breaking performance in the prior art is preferred. The sealed pole 3 generally includes an insulating shell and a vacuum arc extinguishing chamber. The vacuum arc extinguishing chamber includes a moving contact and a static contact, wherein the moving contact is connected to a moving end conductive rod 301, and the static contact is connected to a static end conductive rod 300. The moving contact and the static contact can be controlled to open and close by moving the moving end conductive rod 301.

[0037] The isolating switch 4 is used to disconnect or connect the circuit and has an obvious breakpoint. A knife-type isolating switch 4 is usually adopted. In this embodiment, an insulating bracket portion 302 extends upward from the upper end of the insulating shell in the sealed pole 3. The isolating switch 4 includes an isolating knife 400 hinged to the static end conductive rod 300, an isolating static contact seat 401 arranged on the insulating bracket portion 302, and an isolating knife connecting rod assembly 402.

[0038] The isolation main shaft 5 is rotatably arranged in the electrical room 1, and the isolation knife connecting rod assembly 402 is arranged between the isolation main shaft 5 and the isolation knife 400. The rotation of the isolation main shaft 5 can drive the isolation knife 400 to contact and connect with the isolation static contact seat 401 or separate and disconnect.

[0039] In the present embodiment, the grounding switch 6 has a grounding conductive plate 600 disposed at the lower end of the insulating shell in the sealed pole 3 , and a grounding static contact seat 601 is disposed on the grounding conductive plate 600 .

[0040] The grounding main shaft 7 is rotatably arranged in the electrical room 1, on which a grounding swing arm is arranged, and on which a grounding knife is arranged. Rotating the grounding main shaft 7 can control the grounding knife to be in contact with or disconnected from the grounding static contact seat 601.

[0041] The circuit breaker main shaft 8 is rotatably arranged in the electrical room 1 .

[0042] The circuit breaker linkage shaft 9 is coaxially connected with the circuit breaker main shaft 8 and is arranged in the operating room 2.

[0043] The first transmission assembly is arranged between the moving end conductive rod 301 and the circuit breaker main shaft 8, and includes a circuit breaker swing arm 1001, a circuit breaker swing rod 1002 and a circuit breaker pull rod 1003. The circuit breaker swing arm 1001 is arranged on the circuit breaker main shaft 8 and rotates synchronously therewith. The middle part of the circuit breaker swing rod 1002 is hinged to the lower end of the sealed pole 3, and one end thereof is hinged to the moving end conductive rod 301. The circuit breaker swing rod 1002 is made of insulating material. One end of the circuit breaker pull rod 1003 is hinged to the other end of the circuit breaker swing rod 1002, and the other end thereof is hinged to the circuit breaker swing arm 1001.

[0044] The isolation operating shaft 11 is disposed in the operating room 2 and connected to the isolation main shaft 5 .

[0045] The second transmission assembly is arranged between the isolation main shaft 5 and the isolation operating shaft 11, and includes a first isolation swing arm 1201, a second isolation swing arm 1202 and an isolation connecting rod 1203. The first isolation swing arm 1201 is arranged on the isolation main shaft 5 and rotates synchronously therewith, the second isolation swing arm 1202 is arranged on the isolation operating shaft 11 and rotates synchronously therewith, and the two ends of the isolation connecting rod 1203 are respectively hinged to the first isolation swing arm 1201 and the second isolation swing arm 1202.

[0046] Through the above arrangement, the isolation operating shaft 11 and the circuit breaker linkage shaft 9 are arranged close to each other, which reduces the overall size of the operating mechanism, thereby reducing the overall size of the three-position circuit breaker, which is conducive to the development of miniaturization and lightweight of the three-position circuit breaker.

[0047] Specifically, since the isolation operation shaft 11 and the circuit breaker linkage shaft 9 in the traditional three-position circuit breaker are basically arranged on the upper and lower sides of the sealed pole 3 respectively, in the present embodiment, the isolation operation shaft 11 and the circuit breaker linkage shaft 9 are located between the upper end and the lower end of the sealed pole 3 in the height direction, preferably, the circuit breaker main shaft 8 is arranged in the middle of the sealed pole 3 in the height direction, and in the height direction of the sealed pole 3, the isolation operation shaft 11 is arranged below the isolation main shaft 5 and close to the circuit breaker linkage shaft 9, and the circuit breaker linkage shaft 9 is moved upward by the first transmission assembly, and the isolation operation shaft 11 is arranged as close to the circuit breaker linkage shaft 9 as possible by the second transmission assembly, thereby reducing the distance between the isolation operation shaft 11 and the circuit breaker linkage shaft 9, especially the distance in the height direction, so that the height dimension of the operating box in the three-position circuit breaker can be greatly reduced.

[0048] The grounding operating shaft 13, in this embodiment, a third transmission assembly is arranged between the grounding operating shaft 13 and the grounding main shaft 7, and the structure of the third transmission assembly can refer to the second transmission assembly, so that the grounding operating shaft 13 can be arranged as close to the isolation operating shaft 11 as possible, thereby reducing the size of the interlocking mechanism between the isolation switch 4 and the grounding switch 6.

[0049] A grounding tube 14, which is used for the operating handle to insert into the grounding operating shaft 13, and is sleeved outside the grounding operating shaft 13. The grounding tube 14 is provided with a grounding locking groove, which is only an example and should not be limited to a groove-like structure. A hole-like structure can also achieve the same effect;

[0050] The isolation cylinder 15 is used for the operating handle to be inserted into the isolation operating shaft 11, and is sleeved outside the isolation operating shaft 11. The isolation cylinder 15 is provided with an isolation locking groove. The isolation locking groove is only an example and should not be limited to a groove-like structure. A hole-like structure can also achieve the same effect;

[0051] The upper and lower interlocking plates 16 are slidably arranged along the grounding locking groove and the isolation locking groove, and are guided and limited at both ends, which improves the stability of the upper and lower interlocking plates 16 when moving. An upper limit rod 1601 is arranged on the upper and lower interlocking plates 16 near the isolation operating shaft 11, and a lower limit rod 1602 is arranged near the grounding operating shaft 13. The upper and lower interlocking plates 16 have a third position and a fourth position.

[0052] Specifically, when the upper and lower interlocking pieces 16 are in the third position, the upper ends of the upper and lower interlocking pieces 16 extend into the isolating tube 15 and the lower ends thereof do not extend into the grounding tube 14. At this time, the isolating tube 15 is blocked by the upper ends of the upper and lower interlocking pieces 16, and the operating handle cannot be inserted, while the operating handle can be inserted into the grounding tube 14 to form a connection with the grounding operating shaft 13; when the upper and lower interlocking pieces 16 are in the fourth position, the upper ends of the upper and lower interlocking pieces 16 do not extend into the isolating tube 15 and the lower ends thereof extend into the grounding tube 14. At this time, the operating handle can be inserted into the isolating tube 15 to form a connection with the isolating operating shaft 11, while the grounding tube 14 is blocked by the lower ends of the upper and lower interlocking pieces 16, and the operating handle cannot be inserted.

[0053] The manual lever 17 is arranged on the upper and lower interlocking plates 16 and extends into the operating room 2 for manual operation by the user. The manual lever 17 is used to drive the upper and lower interlocking plates 16 to switch between the third position and the fourth position.

[0054] The grounding interlock disk 18 rotates synchronously with the grounding operating shaft 13. The grounding interlock disk 18 is provided with a first connecting column 1801 and a second connecting column 1802. Specifically, the grounding interlock disk 18 is provided with a through hole for the grounding operating shaft 13 to pass through. The inner wall of the through hole and the outer wall of the grounding operating shaft 13 are provided with a snap-fit ​​structure so that the two can rotate synchronously. The snap-fit ​​structure is a matching protrusion and groove.

[0055] The grounding limit plate 19 is arranged on the grounding interlocking disk 18 and rotates with it. The grounding limit plate 19 is connected to the grounding interlocking disk 18 through the first connecting column 1801. When the upper and lower interlocking plates 16 are in the third position, the grounding limit plate 19 prevents the upper and lower interlocking plates 16 from moving to the fourth position. In this embodiment, the upper edge of the grounding limit plate 19 abuts against the lower limit rod 1602, so that the upper and lower interlocking plates 16 are limited to the third position.

[0056] The isolation interlocking disk 20 rotates synchronously with the isolation operating shaft 11 , and a first limiting protrusion 2001 is provided on the isolation interlocking disk 20 .

[0057] The isolation limit block 21 is arranged on the isolation interlocking disk 20 and rotates with it. When the upper and lower interlocking plates 16 are in the fourth position, the isolation limit block 21 prevents the upper and lower interlocking plates 16 from moving to the third position. In this embodiment, the isolation limit block 21 abuts against the lower limit rod 1602, so that the upper and lower interlocking plates 16 are limited to the fourth position.

[0058] Through the above arrangement, the isolating switch 4 and the grounding switch 6 are prevented from being closed at the same time, thereby ensuring the safety and reliability of product operation.

[0059] The isolation interlock pin 22 is provided with an isolation locking hole on the isolation cylinder 15. The isolation locking hole is only an example and should not be limited to a hole-like structure. A groove-like structure can also achieve the same effect. The isolation interlock pin 22 is slidingly arranged along the isolation locking hole and has a first position and a second position. When the isolation interlock pin 22 is in the first position, the isolation operating shaft 11 is inoperable. At this time, the operating handle cannot be inserted into the isolation cylinder 15 or the isolation interlock pin 22 is inserted into the isolation operating shaft 11 so that it cannot rotate. When the isolation interlock pin 22 is in the second position, the isolation operating shaft 11 is operable.

[0060] The spring is used to maintain and reset the isolation interlock pin 22 to the second position. In this embodiment, a mounting plate is provided on the isolation interlock pin 22, and the spring is sleeved on the isolation interlock pin 22 and located between the mounting plate and the outer wall of the isolation cylinder 15.

[0061] The circuit breaker interlocking paddle 23 is arranged on the circuit breaker linkage shaft 9 and rotates with it. A linkage protrusion 2301 is arranged on it, and the circumferential side wall of the linkage protrusion 2301 is arranged in an arc shape, which improves the smoothness of the linkage.

[0062] An isolation rotating rod 24, wherein the middle portion of the isolation rotating rod 24 is rotatably arranged, that is, rotatably arranged relative to the operating chamber 2, and a first linkage column 2401 is arranged at one end thereof close to the circuit breaker linkage shaft 9, and the other end thereof is connected to the isolation interlocking pin 22, and the first linkage column 2401 is located on the rotation path of the linkage protrusion 2301;

[0063] When the linkage protrusion 2301 rotates along with the circuit breaker linkage shaft 9 , it will abut against the first linkage column 2401 to rotate the isolation rotation rod 24 , thereby driving the isolation interlocking pin 22 to move from the second position to the first position.

[0064] The circuit breaker opening knob 25, the circuit breaker closing knob 26 is provided with a synchronously rotating opening linkage plate 2501, one end of the opening linkage plate 2501 is located on the rotation path of the linkage protrusion 2301;

[0065] The circuit breaker closing knob 26 is provided with a synchronously rotating closing linkage plate 2601, a second linkage column is provided on the closing linkage plate 2601 near the circuit breaker interlocking paddle 23, and a second limiting protrusion is provided on the closing linkage plate 2601 near the isolation interlocking disk 20, the second linkage column is located on the rotation path of the linkage protrusion 2301, and the second limiting protrusion is located on the rotation path of the first limiting protrusion 2001.

[0066] Through the above arrangement, an interlock between the circuit breaker linkage shaft 9 and the isolation operation shaft 11 is formed.

[0067] The cabinet door interlock pin 27 is provided with a grounding locking hole on the grounding tube 14. The cabinet door interlock pin 27 is slidably arranged along the grounding locking hole and has a fifth position and a sixth position. When the cabinet door interlock pin 27 is in the fifth position, the grounding operating shaft 13 is inoperable. At this time, the operating handle cannot be inserted into the grounding tube 14 or the cabinet door interlock pin 27 is inserted into the grounding operating shaft 13 so that it cannot rotate. When the grounding interlock pin is in the sixth position, the grounding operating shaft 13 is operable.

[0068] The cabinet door interlocking plate 28 is hinged to the second connecting column 1802 , and a slot matching the first connecting column 1801 is provided on the cabinet door interlocking plate 28 .

[0069] The cabinet door is provided with a first opening corresponding to the cabinet door interlocking pin 27 and a second opening corresponding to the cabinet door interlocking plate 28 .

[0070] Through the above arrangement, an interlock between the grounding operation shaft 13 and the cabinet door is formed.

[0071] The operation methods of the five-defense interlocking mechanism include:

[0072] Step A: When the cabinet door is closed, the grounding switch 6 is in the closed state, and the isolating switch 4 and the circuit breaker are in the open state. Figure 4 As shown, at this time, the cabinet door has been closed, and the cabinet door interlock pin 27 is in the sixth position, which releases the lock on the grounding operation shaft 13. The grounding tube 14 can be inserted to form a connection with the grounding operation shaft 13 to operate the grounding switch 6.

[0073] Since the grounding switch 6 is in the closed state at this time, the upper edge of the grounding limit plate 19 abuts against the lower limit rod 1602, so that the upper and lower interlocking plates 16 are limited to the third position, and the upper and lower interlocking plates 16 cannot be moved to the fourth position by the manual lever 17, thereby locking the isolating operating shaft 11, making it impossible for the operating handle to be inserted into the operating isolating switch 4, keeping the isolating switch 4 in the open state. At this time, the first limit protrusion 2001 of the isolation interlocking disk 20 clamps the second limit protrusion of the circuit breaker closing knob 26, making it impossible for the circuit breaker closing knob 26 to rotate clockwise, so that the circuit breaker cannot be closed, that is, the pole 3 is sealed, and the circuit breaker is kept in the open state, thereby achieving the purpose of preventing the isolating switch 4 and the circuit breaker from being closed when the grounding switch 6 is in the closed state.

[0074] Step B: When the operating handle is inserted into the grounding tube 14 and the grounding operating shaft 13 is rotated clockwise, the grounding switch 6 is opened and the operating handle is pulled out. Figure 5 As shown, at this time, the grounding switch 6 is in the open state, and the grounding limit plate 19 also rotates clockwise with the grounding operating shaft 13, releasing the downward movement restriction of the upper and lower interlocking plates 16, and the manual lever 17 is manually moved downward. At this time, the upper and lower interlocking plates 16 are in the third position, locking the grounding operating shaft 13 and releasing the restriction of the isolation operating shaft 11. At this time, the operating handle can be inserted to operate the isolation switch 4, and then the isolation operating shaft 11 is rotated counterclockwise to close the isolation switch 4. At this time, the isolation interlocking disk 20 also rotates counterclockwise accordingly, releasing the restriction on the circuit breaker closing knob 26, and the circuit breaker can be closed. The circuit breaker performs the closing operation, and because of the counterclockwise movement of the isolation interlock disk 20, the isolation limit block 21 installed on the part rotates accordingly, and the isolation limit block 21 clamps the upper and lower interlocking plates 16, so that the upper and lower interlocking plates 16 cannot move upward and continue to remain in the third position, locking the grounding operation shaft 13, so that the operating handle cannot be inserted to perform the closing operation on the grounding operation shaft 13, thereby achieving the interlocking purpose of the grounding switch 6 being in the open state, the isolating switch 4 can be operated, and the circuit breaker can be closed only when the isolating switch 4 is in the closed state, and the grounding switch 6 cannot be closed.

[0075] Step C: When the circuit breaker closing knob 26 is turned clockwise to close the circuit breaker, the circuit breaker main shaft 8 also rotates counterclockwise to the position shown in FIG. Figure 6 The position shown in the figure drives the circuit breaker interlocking paddle 23 to rotate counterclockwise, and pushes the isolation rotating rod 24 to rotate clockwise along its axis, and moves the isolation interlocking pin 22 to the right, locking the isolation operating shaft 11, so that the isolation switch 4 cannot be operated, thereby achieving the interlocking purpose that when the circuit breaker is in the closed state, the isolation switch 4 cannot be opened and the grounding switch 6 cannot be operated;

[0076] Step D: When the power is off, the circuit breaker is first opened. After the circuit breaker is opened, the circuit breaker main shaft 8 rotates clockwise, driving the circuit breaker interlocking paddle 23 to release the restriction on the isolation rotating rod 24. The isolation interlocking pin 22 is reset to the left under the action of the spring, releasing the restriction of the isolation operating shaft 11. At this time, the operating handle can be inserted to open the isolation switch 4. The reverse operation of steps A and B can be performed to close the grounding switch 6 and open the cabinet door to achieve the purpose of power outage maintenance.

[0077] Embodiment 2:

[0078] like Figures 7 to 10 As shown, this embodiment adds a forced interlocking mechanism on the basis of the first embodiment to prevent misoperation caused by interlock failure of the operation panel and thus prevent safety accidents. This design completely eliminates the possibility of simultaneous closing of the isolating switch 4 and the grounding switch 6, thus ensuring the safe and reliable operation of the product.

[0079] Specifically, it also includes an upper and lower limit plate 29, the middle part of which is hinged, and an upper cam 2901 is arranged near the isolation interlocking disk 20, and a lower cam 2902 is arranged near the grounding interlocking disk 18; wherein the cam-shaped structure is only a preferred structure, and the mechanism has better fluidity, but it should not be limited to this structure, the isolation interlocking disk 20 is provided with a first cam groove 2002 and a first abutting protrusion 2003 adapted to the upper cam 2901, and the grounding interlocking disk 18 is provided with a second cam groove 1803 and a second abutting protrusion 1804 adapted to the lower cam 2902; when the grounding switch 6 is closed When the isolating switch 4 is opened, the second abutting protrusion 1804 abuts against the lower cam 2902, and the upper cam 2901 is snapped into the first cam groove 2002, so that the isolating switch 4 is restricted in the open state; when the grounding switch 6 is opened, the upper cam 2901 disengages from the first cam groove 2002, and the lower cam 2902 disengages from the second cam groove 1803, thereby releasing the restriction on the closing of the isolating switch 4; when the isolating switch 4 is closed, the grounding switch 6 is still opened, the upper cam 2901 abuts against the first abutting protrusion 2003, and the lower cam 2902 is snapped into the second cam groove 1803, so that the grounding switch 6 is restricted in the open state.

[0080] It also includes an upper limit shaft 30 and a lower limit shaft 31. The upper and lower limit plates 29 are provided with an upper sliding hole 2903 at one end close to the upper cam 2901, and a lower sliding hole 2904 at one end close to the lower cam 2902. The upper limit shaft 30 extends into the upper sliding hole 2903, and the lower limit shaft 31 extends into the lower sliding hole 2904. The sliding holes are oblong holes, which effectively limit the movement range and path of the upper cam 2901 and the lower cam 2902.

[0081] The operation method of the forced interlocking mechanism includes:

[0082] Step E: When the grounding switch 6 is in the closed state and the isolating switch 4 is in the open state, Figure 7 As shown, since the grounding operation shaft 13 is in the closed state, the second abutting protrusion 1804 of the grounding interlocking plate 18 is driven to abut against the lower cam 2902. At this time, the upper and lower limit plates 29 rotate counterclockwise around the hinge point under the action of the grounding interlocking plate 18 to reach Figure 4 In the position shown, the upper cam 2901 of the upper and lower limit plates 29 is stuck in the first cam groove 2002 of the isolation interlock disk 20, limiting the rotational movement of the isolation interlock disk 20, thereby limiting the rotation of the isolation operating shaft 11, so that the isolation switch 4 is restricted to the open state and cannot be closed. The purpose of the five-protection interlocking that the isolation switch 4 cannot be closed when the grounding switch 6 is closed is achieved.

[0083] Step F: When the operating handle is inserted, the grounding operating shaft 13 is rotated clockwise to open the grounding switch 6. After the operating handle is pulled out, Figure 8 As shown, at this time, the grounding operating shaft 13 is in the open state, and the grounding interlock disk 18 also releases the rotation restriction of the upper and lower limit plates 29 due to the clockwise rotation. The upper cams 2901 of the upper and lower limit plates 29 leave the first cam groove 2002 of the isolation interlock disk 20, thereby releasing the rotation restriction of the isolation operating shaft 11 and also releasing the restriction on closing the isolation switch 4.

[0084] Step G: When the operating handle is inserted into the isolation operating shaft 11 and rotated counterclockwise to close the isolation switch 4, the operating handle is pulled out. Fig. 9 As shown, at this time, the isolating switch 4 is in the closed state, and the grounding switch 6 is still in the open state. The upper and lower limit plates 29 drive the isolating interlock disk 20 to rotate clockwise around the hinge point due to the counterclockwise movement of the upper and lower limit plates 29, so that the lower cam 2902 of the upper and lower limit plates 29 is stuck in the second cam groove 1803 of the grounding interlock disk 18, limiting the rotational movement of the grounding interlock disk 18, thereby limiting the rotation of the grounding operating shaft 13, so that the grounding switch 6 is restricted in the open state and cannot be closed, thereby achieving the purpose of the five-protection interlocking that the grounding switch 6 cannot be closed when the isolating switch 4 is closed.

[0085] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that the requirements of this application encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0086] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0087] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A three-position circuit breaker with five-protection interlocking, comprising an isolating main shaft, a circuit breaker main shaft and a sealed pole, characterized in that: It also includes an isolation operation shaft and a circuit breaker linkage shaft which are arranged close to each other. The isolation operation shaft and the circuit breaker linkage shaft are located between the upper end and the lower end of the sealed pole in the height direction.

2. A three-position circuit breaker with five-protection interlocking according to claim 1, characterized in that: The circuit breaker main shaft is arranged in the middle of the sealed pole in the height direction, the circuit breaker linkage shaft is coaxially connected to the circuit breaker main shaft, and in the height direction of the sealed pole, the isolation operation shaft is arranged below the isolation main shaft and close to the circuit breaker linkage shaft.

3. A three-position circuit breaker with five-protection interlocking according to claim 2, characterized in that: The sealed pole comprises a movable end conductive rod, a first transmission assembly is arranged between the movable end conductive rod and the main shaft of the circuit breaker, and the first transmission assembly comprises: A circuit breaker swing arm, wherein the circuit breaker swing arm is arranged on the circuit breaker main shaft and rotates synchronously therewith; A circuit breaker swing arm, wherein the middle portion of the circuit breaker swing arm is hinged to the lower end of the sealed pole, and one end of the circuit breaker swing arm is hinged to the movable end conductive rod; And a circuit breaker pull rod, one end of the circuit breaker pull rod is hinged to the other end of the circuit breaker swing rod, and the other end of the circuit breaker pull rod is hinged to the circuit breaker swing arm.

4. A three-position circuit breaker with five-protection interlocking according to claim 2, characterized in that: A second transmission assembly is provided between the isolation main shaft and the isolation operation shaft, and the second transmission assembly comprises: A first isolation swing arm, the first isolation swing arm is arranged on the isolation main shaft and rotates synchronously therewith; A second isolation swing arm, the second isolation swing arm is disposed on the isolation operation shaft and rotates synchronously therewith; And an isolating connecting rod, the two ends of which are respectively hinged to the first isolating swing arm and the second isolating swing arm.

5. A three-position circuit breaker with five-protection interlocking according to claim 2, characterized in that: Also includes: Ground operating shaft; A grounding cylinder, which is used for the operating handle to insert into the grounding operating shaft, and is sleeved outside the grounding operating shaft. A grounding locking groove is provided on the grounding cylinder; An isolation cylinder, which is used for the operating handle to be inserted into the isolation operating shaft, and is sleeved outside the isolation operating shaft. An isolation locking groove is provided on the isolation cylinder; An upper and lower interlocking piece, wherein the upper and lower interlocking pieces are slidably arranged along the grounding locking groove and the isolation locking groove, an upper limit rod portion is arranged on the upper and lower interlocking pieces close to the isolation operating shaft, and a lower limit rod portion is arranged close to the grounding operating shaft, and the upper and lower interlocking pieces have a third position and a fourth position, when the upper and lower interlocking pieces are in the third position, the upper ends of the upper and lower interlocking pieces extend into the isolation cylinder and the lower ends thereof do not extend into the grounding cylinder, and when the upper and lower interlocking pieces are in the fourth position, the upper ends of the upper and lower interlocking pieces do not extend into the isolation cylinder and the lower ends thereof extend into the grounding cylinder; A manual lever, the manual lever being arranged on the upper and lower interlocking plates, and the manual lever being used to drive the upper and lower interlocking plates to switch between the third position and the fourth position; A grounding interlocking disk, the grounding interlocking disk rotates synchronously with the grounding operating shaft; A grounding limit plate, which is arranged on the grounding interlocking plate and rotates with the grounding interlocking plate, and when the upper and lower interlocking plates are in the third position, the grounding limit plate prevents the upper and lower interlocking plates from moving to the fourth position; An isolation interlocking disk, the isolation interlocking disk rotates synchronously with the isolation operating shaft; The isolation limit block is arranged on the isolation interlocking disk and rotates with it. When the upper and lower interlocking plates are in the fourth position, the isolation limit block prevents the upper and lower interlocking plates from moving to the third position.

6. A three-position circuit breaker with five-protection interlocking according to claim 5, characterized in that: Also includes: An isolation interlocking pin, wherein the isolation cylinder is provided with an isolation locking hole, the isolation interlocking pin is slidably arranged along the isolation locking hole and has a first position and a second position, when the isolation interlocking pin is in the first position, the isolation operating shaft is inoperable, and when the isolation interlocking pin is in the second position, the isolation operating shaft is operable; a spring, the spring being used to isolate the interlock pin from being held and reset to the second position; A circuit breaker interlocking paddle, which is arranged on the circuit breaker linkage shaft and rotates with it, and is provided with a linkage protrusion; and an isolation rotating rod, wherein the middle part of the isolation rotating rod is rotatably arranged, one end of the isolation rotating rod close to the circuit breaker linkage shaft is provided with a first linkage column, the other end of the isolation rotating rod is connected to the isolation interlocking pin, and the first linkage column is located on the rotation path of the linkage protrusion; When the linkage protrusion rotates along with the linkage shaft of the circuit breaker, it will abut against the first linkage column to rotate the isolation rotation rod, thereby driving the isolation interlocking pin to move from the second position to the first position.

7. A three-position circuit breaker with five-protection interlocking according to claim 6, characterized in that: Also includes: A circuit breaker opening knob, wherein a synchronously rotating opening linkage plate is provided on the circuit breaker opening knob, and one end of the opening linkage plate is located on the rotation path of the linkage protrusion; And a circuit breaker closing knob, wherein a synchronously rotating closing linkage plate is arranged on the circuit breaker closing knob, a first limiting protrusion is arranged on the isolation interlock disk, a second linkage column is arranged on the closing linkage plate near the circuit breaker interlocking paddle, a second limiting protrusion is arranged on the second linkage column near the isolation interlock disk, the second linkage column is located on the rotation path of the linkage protrusion, and the second limiting protrusion is located on the rotation path of the first limiting protrusion.

8. A three-position circuit breaker with five-protection interlocking according to claim 7, characterized in that: Also includes: A cabinet door interlock pin, wherein the grounding cylinder is provided with a grounding locking hole, the cabinet door interlock pin is slidably arranged along the grounding locking hole and has a fifth position and a sixth position, when the cabinet door interlock pin is in the fifth position, the grounding operating shaft is inoperable, and when the grounding interlock pin is in the sixth position, the grounding operating shaft is operable; A cabinet door interlock plate, wherein the grounding interlock plate is provided with a first connecting column and a second connecting column, the grounding limit plate is connected to the grounding interlock plate through the first connecting column, the cabinet door interlock plate is hinged to the second connecting column, and the cabinet door interlock plate is provided with a card slot adapted to the first connecting column; and a cabinet door, wherein the cabinet door is provided with a first opening corresponding to the cabinet door interlocking pin, and is provided with a second opening corresponding to the cabinet door interlocking plate.

9. A three-position circuit breaker with five-protection interlocking according to claim 2 or 5, characterized in that: Also includes: Earthing switch; Isolating switch; Upper and lower limit plates, wherein the middle parts of the upper and lower limit plates are hingedly arranged, an upper cam is arranged near the isolation interlocking disk, and a lower cam is arranged near the grounding interlocking disk; The isolation interlocking plate is provided with a first cam groove and a first abutting protrusion adapted to the upper cam, and the grounding interlocking plate is provided with a second cam groove and a second abutting protrusion adapted to the lower cam; When the grounding switch is closed and the isolating switch is opened, the second abutting protrusion abuts against the lower cam, and the upper cam is inserted into the first cam groove, so that the isolating switch is restricted to the open state; When the grounding switch is opened, the upper cam disengages from the first cam groove, and the lower cam disengages from the second cam groove, thereby releasing the restriction on closing the disconnector; When the isolating switch is closed, the grounding switch is still open, the upper cam abuts against the first abutting protrusion, and the lower cam is stuck in the second cam groove, so that the grounding switch is restricted in the open state.

10. A three-position circuit breaker with five-protection interlocking according to claim 9, characterized in that: It also includes an upper limit shaft and a lower limit shaft. The upper and lower limit plates are provided with an upper sliding hole at one end close to the upper cam and a lower sliding hole at one end close to the lower cam. The upper limit shaft extends into the upper sliding hole and the lower limit shaft extends into the lower sliding hole.

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