Manual separating mechanism of permanent magnet circuit breaker

Abstract

The utility model discloses a manual separating mechanism of a permanent magnet circuit breaker, which comprises a rack, a main shaft is rotatably mounted on the rack, an operating shaft and an auxiliary switch are respectively mounted on the rack on two sides below the main shaft, and one end of the operating shaft, one end of the main shaft and one end of a rotating shaft of the auxiliary switch are all positioned on one side of the rack. The other end of the operation shaft, the other end of the main shaft and the other end of the rotating shaft of the auxiliary switch are all located on the other side of the rack, one end of the operation shaft penetrates through a support and is rotationally connected with the support, the support is fixedly arranged on the rack, and the operation shaft between the support and the rack is sleeved with a cylindrical torsional spring; the other end of the operation shaft is connected with the other end of the main shaft through a first transmission structure, and the other end of the main shaft is connected with the other end of the rotating shaft of the auxiliary switch through a second transmission structure. The utility model aims to provide the manual separating mechanism of the permanent magnet circuit breaker, which is simple in structure and low in cost, and the reset reliability is high due to the fact that secondary loop signal switching is in a spring reset design form.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnetic circuit breakers, in particular to a manual release mechanism of a permanent magnetic circuit breaker. Background Art

[0002] With the development of society, gas insulated ring main unit is more and more widely used. Permanent magnet mechanism circuit breaker ring main unit has the characteristics of small footprint and maintenance-free. The existing permanent magnet mechanism circuit breaker opening and closing depends on the secondary signal. When the secondary circuit fails or is under maintenance, the circuit breaker cannot be opened and closed. The existing permanent magnet circuit breaker manual opening mechanism has complex transmission, complex assembly, high cost, poor reset reliability, and inadequate secondary circuit signal switching. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a manual release mechanism of a permanent magnetic circuit breaker, which has a simple structure and low cost, and a secondary circuit signal switching design form of spring reset, and high reset reliability.

[0004] The manual release mechanism of the permanent magnetic circuit breaker of the utility model comprises a frame, a main shaft is rotatably mounted on the frame, an operating shaft is rotatably mounted on the frame on one side below the main shaft, an auxiliary switch is mounted on the frame on the other side below the main shaft, one end of the operating shaft, one end of the main shaft and one end of the rotating shaft of the auxiliary switch are all located on one side of the frame, the other end of the operating shaft, the other end of the main shaft and the other end of the rotating shaft of the auxiliary switch are all located on the other side of the frame, one end of the operating shaft passes through a bracket and is rotatably connected to the bracket, the bracket is fixedly arranged on the frame, a cylindrical torsion spring is sleeved on the operating shaft between the bracket and the frame, one end of the cylindrical torsion spring is fixedly connected to the operating shaft, the other end of the cylindrical torsion spring is fixedly connected to the bracket or the frame, the other end of the operating shaft is connected to the other end of the main shaft via a first transmission structure, the other end of the main shaft is connected to the other end of the rotating shaft of the auxiliary switch via a second transmission structure,

[0005] One end of the cylindrical torsion spring is fixedly connected to the operating shaft through a torsion spring clamp, and the torsion spring clamp is fixedly arranged on the operating shaft. A limiting hole is provided on the torsion spring clamp, and one end of the cylindrical torsion spring is fixedly inserted in the limiting hole. The other end of the cylindrical torsion spring is fixedly connected to the bracket or the frame through a torsion spring clamping block, and the torsion spring clamping block is fixedly arranged on the bracket or the frame. A limiting groove is provided on the torsion spring clamping block, and the other end of the cylindrical torsion spring is fixedly arranged in the limiting groove.

[0006] The utility model discloses a manual release mechanism of a permanent magnetic circuit breaker, wherein the first transmission structure comprises a first crank arm, a first pull plate and a second crank arm, one end of the first crank arm is fixedly connected to the other end of the operating shaft, the other end of the first crank arm is hinged to one end of the first pull plate, the other end of the first pull plate is movably connected to one end of the second crank arm, the other end of the second crank arm is fixedly connected to the other end of the main shaft, the other end of the operating shaft and the other end of the main shaft are respectively located on opposite sides of the first pull plate, the other end of the first pull plate is provided with a strip through hole arranged along the length direction of the first pull plate, one end of the second crank arm is fixedly provided with a first pin shaft, and the first pin shaft is slidably connected in the strip through hole.

[0007] The utility model discloses a manual release mechanism of a permanent magnetic circuit breaker, wherein the second transmission structure comprises a third crank arm, a second pull plate and a fourth crank arm, one end of the third crank arm is fixedly connected to the other end of the main shaft, the third crank arm and the second crank arm are arranged opposite to each other, the other end of the third crank arm is hinged to one end of the second pull plate, the other end of the second pull plate is hinged to one end of the fourth crank arm, the other end of the fourth crank arm is fixedly connected to the other end of the rotating shaft of the auxiliary switch, and the other end of the main shaft and the other end of the rotating shaft of the auxiliary switch are both located on the same side of the second pull plate.

[0008] The utility model discloses a manual release mechanism for a permanent magnetic circuit breaker, wherein the other end of the rotating shaft of the auxiliary switch is fixedly connected with a fixed plate, the fixed plate is circular, the center of the fixed plate is fixedly connected to the other end of the rotating shaft of the auxiliary switch, the other end of the fourth crank arm is fixedly connected to the fixed plate, and the fourth crank arm is arranged along the radial direction of the fixed plate.

[0009] The utility model discloses a manual release mechanism for a permanent magnetic circuit breaker, wherein the other end of the first crank arm is hinged to one end of the first pull plate through a second pin shaft, the other end of the third crank arm is hinged to one end of the second pull plate through a third pin shaft, and the other end of the second pull plate is hinged to one end of the fourth crank arm through a fourth pin shaft.

[0010] The utility model discloses a manual opening mechanism for a permanent magnetic circuit breaker, wherein one end of the main shaft is fixedly connected with a fixed shaft, the fixed shaft is coaxially arranged with the main shaft, and an opening and closing indicator is fixedly arranged on the fixed shaft.

[0011] The utility model discloses a manual release mechanism of a permanent magnetic circuit breaker, wherein the frame comprises a first frame plate, a second frame plate and a third frame plate, which are all arranged vertically, the second frame plate and the third frame plate are both fixedly connected to the same side of the first frame plate, the second frame plate and the third frame plate are opposite to each other and arranged at intervals, the first frame plate, the second frame plate and the third frame plate together form a U-shaped plate structure, a main shaft is rotatably mounted on the first frame plate, an operating shaft is rotatably mounted on the first frame plate on one side below the main shaft, an auxiliary switch is mounted on the first frame plate on the other side below the main shaft, the other end of the operating shaft, the other end of the main shaft and the other end of the rotating shaft of the auxiliary switch are all located in a space surrounded by the first frame plate, the second frame plate and the third frame plate, and the first crank arm, the first pull plate, the second crank arm, the third crank arm, the second pull plate, the fourth crank arm and the fixed plate are also all located in a space surrounded by the first frame plate, the second frame plate and the third frame plate.

[0012] The utility model discloses a manual release mechanism of a permanent magnetic circuit breaker, wherein the bracket comprises a first bracket plate, a second bracket plate and a third bracket plate, the first bracket plate is arranged vertically, the second bracket plate and the third bracket plate are both fixedly connected to the same side of the first bracket plate in the horizontal direction, the second bracket plate and the third bracket plate are opposite to each other and arranged at intervals up and down, the first bracket plate, the second bracket plate and the third bracket plate together form a U-shaped plate structure, the second bracket plate and the third bracket plate are both fixedly connected to the first frame plate, one end of the operating shaft passes through the first bracket plate and is rotatably connected to the first bracket plate, and the torsion spring clamping block is fixedly arranged on the second bracket plate, the third bracket plate or the first frame plate.

[0013] In the manual release mechanism of the permanent magnetic circuit breaker of the utility model, one end of the operating shaft is fixedly connected with an interlocking plate, and the interlocking plate is located outside the space surrounded by the first bracket plate, the second bracket plate and the third bracket plate.

[0014] The utility model discloses a manual release mechanism for a permanent magnetic circuit breaker, wherein the second crank arm and the third crank arm are combined into one crank arm, and the other end of the main shaft is fixedly provided with a driving sleeve for connecting with the permanent magnetic mechanism of the permanent magnetic circuit breaker.

[0015] The manual tripping mechanism of the permanent magnetic circuit breaker of the utility model is different from the prior art in that the manual tripping mechanism of the permanent magnetic circuit breaker of the utility model is used to perform emergency tripping of the permanent magnetic mechanism of the permanent magnetic circuit breaker when in use. The permanent magnetic mechanism of the permanent magnetic circuit breaker is arranged in an air box, and the air box is arranged in a switch cabinet. The manual tripping mechanism is arranged on the outer wall of the front plate of the air box, that is, the frame is fixedly arranged on the outer wall of the front plate of the air box, the opening and closing shaft of the permanent magnetic mechanism is rotatably arranged on the front plate of the air box, and a part of the opening and closing shaft extends to the outside of the front plate of the air box, and the other end of the main shaft of the manual tripping mechanism is coaxially fixedly connected with the part of the opening and closing shaft extending to the outside of the front plate of the air box, so as to drive the opening and closing shaft to rotate, so as to achieve the purpose of manually opening the permanent magnetic mechanism. When emergency opening is required, an external force is applied to one end of the operating shaft to rotate the operating shaft. Since one end of the cylindrical torsion spring is fixedly connected to the operating shaft, and the other end of the cylindrical torsion spring is fixedly connected to the bracket or the frame, the operating shaft drives the cylindrical torsion spring to tighten and store energy. At the same time, the other end of the operating shaft drives the main shaft to rotate through the first transmission structure, and the main shaft drives the shaft of the auxiliary switch to rotate through the second transmission structure. That is, when the operating shaft rotates, the main shaft and the shaft of the auxiliary switch can rotate with the operating shaft. When the main shaft rotates with the operating shaft, the opening and closing shaft fixedly connected to the main shaft also rotates, so that the opening can be completed; when the shaft of the auxiliary switch rotates with the operating shaft, the connection state of the contact of the auxiliary switch changes, from the previous normally open contact to the normally closed contact, and the normally closed contact to the normally open contact. In this way, the auxiliary switch can provide corresponding auxiliary contacts for the electrical interlock in the secondary circuit, and the opening and closing state of the permanent magnetic mechanism can also be judged through the auxiliary switch. When the switch is not needed, the external force applied to one end of the operating shaft is removed, and the cylindrical torsion spring changes from a tightened state to an initial state and releases the stored energy. During this process, the cylindrical torsion spring drives the operating shaft to rotate in the opposite direction, and the main shaft and the auxiliary switch shafts also rotate in the opposite direction with the operating shaft until the operating shaft, the main shaft and the auxiliary switch shafts are restored to their initial state to wait for the next switch-off operation. It can be seen that the utility model has a simple structure and low cost, and the secondary circuit signal switching is designed by spring reset, and the reset reliability is high.

[0016] The utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the manual release mechanism of the permanent magnetic circuit breaker of the utility model;

[0018] Figure 2 It is a left side view of the manual release mechanism of the permanent magnetic circuit breaker of the utility model;

[0019] Figure 3 It is a right side view of the manual release mechanism of the permanent magnetic circuit breaker of the utility model;

[0020] Figure 4 It is a rear view of the manual release mechanism of the permanent magnetic circuit breaker of the utility model;

[0021] Figure 5 It is a top view of the manual release mechanism of the permanent magnetic circuit breaker of the utility model;

[0022] Figure 6 A three-dimensional view of the front side of the hand-release mechanism of the permanent magnetic circuit breaker of the utility model Figure 1 ;

[0023] Figure 7 A three-dimensional view of the front side of the hand-release mechanism of the permanent magnetic circuit breaker of the utility model Figure 2 ;

[0024] Figure 8 A three-dimensional view from the rear side of the hand-release mechanism of the permanent magnetic circuit breaker of the utility model Figure 1 ;

[0025] Fig. 9 A three-dimensional view from the rear side of the hand-release mechanism of the permanent magnetic circuit breaker of the utility model Figure 2 . DETAILED DESCRIPTION

[0026] like Figure 1 As shown, combined with Figure 2-9 As shown, the manual release mechanism of the permanent magnetic circuit breaker of the utility model comprises a frame 8, on which a main shaft 29 is rotatably mounted through a bearing, an operating shaft 5 is rotatably mounted on the frame 8 on one side below the main shaft 29 through a bearing, an auxiliary switch 2 is mounted on the frame 8 on the other side below the main shaft 29, and one end of the operating shaft 5 (i.e. Figure 1 , 6 , the front end shown in 7), one end of the main shaft 29 (i.e. Figure 1 , 6 , 7) and one end of the rotating shaft 3 of the auxiliary switch 2 (i.e. Figure 1 , 6 , 7) are located on one side of the frame 8 (i.e. Figure 1 , 6 , the front side shown in 7), the other end of the operating shaft 5 (i.e. Figure 4 , 8 , the rear end shown in 9), the other end of the main shaft 29 (i.e. Figure 4 , 8 , the rear end shown in 9) and the other end of the rotating shaft 3 of the auxiliary switch 2 (i.e. Figure 4 , 8 , and the rear end shown in 9) are located on the other side of the frame 8 (i.e. Figure 4 , 8 , the rear side shown in 9).

[0027] One end of the operating shaft 5 passes through a bracket 7 and is rotatably connected to the bracket 7 through a bearing. The bracket 7 is located at the front side of the frame 8, and the bracket 7 is fixed on the frame 8. A cylindrical torsion spring 15 is mounted on the operating shaft 5 between the bracket 7 and the frame 8. One end of the cylindrical torsion spring 15 (i.e. Figure 6 , 7 The front end shown in FIG. 1 is fixedly connected to the operating shaft 5, and the other end of the cylindrical torsion spring 15 (i.e. Figure 6 , 7 The rear end shown in the figure is fixedly connected to the bracket 7 or the frame 8. When the operating shaft 5 rotates in the direction of opening the gate, the operating shaft 5 can drive one end of the cylindrical torsion spring 15 to rotate together, and because the other end of the cylindrical torsion spring 15 is fixed to the bracket 7 or the frame 8, the other end does not rotate, so that the cylindrical torsion spring 15 can be tightened and stored.

[0028] The specific installation method of the cylindrical torsion spring 15 is as follows: one end of the cylindrical torsion spring 15 is fixedly connected to the operating shaft 5 through a torsion spring clamp (not shown in the figure), the torsion spring clamp is fixedly arranged on the operating shaft 5, the torsion spring clamp is provided with a limiting hole, one end of the cylindrical torsion spring 15 is fixedly inserted in the limiting hole, the other end of the cylindrical torsion spring 15 is fixedly connected to the bracket 7 or the frame 8 through a torsion spring clamp (not shown in the figure), the torsion spring clamp is fixedly arranged on the bracket 7 or the frame 8, the torsion spring clamp is provided with a limiting groove, and the other end of the cylindrical torsion spring 15 is fixedly arranged in the limiting groove.

[0029] The other end of the operating shaft 5 is connected to the other end of the main shaft 29 through a first transmission structure, and the other end of the main shaft 29 is connected to the other end of the rotating shaft 3 of the auxiliary switch 2 through a second transmission structure. The function of the first transmission structure is to generate a linkage of simultaneous rotation between the operating shaft 5 and the main shaft 29, that is, when the operating shaft 5 rotates, the operating shaft 5 can drive the main shaft 29 to rotate along with the operating shaft 5 through the first transmission structure. The function of the second transmission structure is to generate a linkage of simultaneous rotation between the main shaft 29 and the rotating shaft 3 of the auxiliary switch 2, that is, when the main shaft 29 rotates, the main shaft 29 can drive the rotating shaft 3 of the auxiliary switch 2 to rotate along with the main shaft 29 through the second transmission structure. It can be seen from the above analysis that when the operating shaft 5 rotates, the main shaft 29 rotates along with the operating shaft 5, and the rotating shaft 3 of the auxiliary switch 2 rotates along with the main shaft 29, that is, the operating shaft 5, the main shaft 29 and the rotating shaft 3 of the auxiliary switch 2 can rotate together.

[0030] like Figure 4 , 8As shown in Figure 9, the manual release mechanism of the permanent magnetic circuit breaker of the utility model, wherein the first transmission structure includes a first crank arm 27, a first pull plate 28 and a second crank arm 18, one end of the first crank arm 27 is fixedly connected to the other end of the operating shaft 5, the other end of the first crank arm 27 is hinged to one end (i.e., the lower end) of the first pull plate 28, the other end (i.e., the upper end) of the first pull plate 28 is movably connected to one end of the second crank arm 18, the other end of the second crank arm 18 is fixedly connected to the other end of the main shaft 29, and the other end of the operating shaft 5 and the other end of the main shaft 29 are respectively located on opposite sides of the first pull plate 28. The other end of the first pull plate 28 is provided with a strip-shaped through hole 17 arranged along the length direction of the first pull plate 28, and one end of the second crank arm 18 is fixedly provided with a first pin shaft 16, and the first pin shaft 16 is slidably connected in the strip-shaped through hole 17.

[0031] The utility model discloses a manual release mechanism for a permanent magnetic circuit breaker, wherein the second transmission structure comprises a third crank arm 20, a second pull plate 22 and a fourth crank arm 24, one end of the third crank arm 20 is fixedly connected to the other end of the main shaft 29, the third crank arm 20 is arranged opposite to the second crank arm 18, the other end of the third crank arm 20 is hinged to one end (i.e., the upper end) of the second pull plate 22, the other end (i.e., the lower end) of the second pull plate 22 is hinged to one end of the fourth crank arm 24, the other end of the fourth crank arm 24 is fixedly connected to the other end of the rotating shaft 3 of the auxiliary switch 2, and the other end of the main shaft 29 and the other end of the rotating shaft 3 of the auxiliary switch 2 are both located on the same side of the second pull plate 22.

[0032] The manual release mechanism of the permanent magnetic circuit breaker of the present invention, wherein the other end of the first crank arm 27 is hinged to one end of the first pull plate 28 through the second pin 26, the other end of the third crank arm 20 is hinged to one end of the second pull plate 22 through the third pin 21, and the other end of the second pull plate 22 is hinged to one end of the fourth crank arm 24 through the fourth pin 23.

[0033] In the manual release mechanism of the permanent magnetic circuit breaker of the utility model, the other end of the rotating shaft 3 of the auxiliary switch 2 is fixedly connected with a fixed plate 25, the fixed plate 25 is circular, the center of the fixed plate 25 is fixedly connected to the other end of the rotating shaft 3 of the auxiliary switch 2, the other end of the fourth turning arm 24 is fixedly connected to the fixed plate 25, the fourth turning arm 24 is arranged along the radial direction of the fixed plate 25, that is, the fourth turning arm 24 or the extension line of the fourth turning arm 24 passes through the center of the fixed plate 25. In this way, since the upper end of the second pull plate 22 is hinged to the third turning arm 20 through the third pin 21, and the lower end is hinged to the fourth turning arm 24 through the fourth pin 23, therefore, the connecting line between the other end of the main shaft 29 and the other end of the rotating shaft 3 of the auxiliary switch 2, the third turning arm 20, the second pull plate 22 and the fourth turning arm 24 form a four-bar linkage.

[0034] In this embodiment, the operating shaft 5 is rotated and the first crank arm 27 is swung downward, the first crank arm 27 pulls the first pull plate 28 to move downward, and the first pull plate 28 pulls the second crank arm 18 to swing downward, so that the main shaft 29 is driven by the second crank arm 18 to rotate, and the main shaft 29 drives the opening and closing shaft of the permanent magnetic mechanism of the permanent magnetic circuit breaker to rotate, completing the opening. Figure 8 , 9 As shown in the figure, the other end of the operating shaft 5 is located on the left side of the lower end of the first pull plate 28, and the other end of the main shaft 29 is located on the right side of the upper end of the first pull plate 28. When the operating shaft 5 and the main shaft 29 rotate simultaneously, the first crank arm 27 and the second crank arm 18 both swing downward, but the distance between the second pin shaft 26 and the first pin shaft 16 will change. Therefore, the two ends of the first pull plate 28 are not respectively hinged to the first crank arm 27 and the second crank arm 18 through the pin shafts, but only the lower end of the first pull plate 28 is connected to the first pull plate 28. The second pin 26 is hinged with the first crank arm 27, and the upper end of the first pull plate 28 is movably connected with the second crank arm 18 through the first pin 16 and the strip through hole 17 (that is, the upper end of the first pull plate 28 is provided with a strip through hole 17 arranged along the length direction of the first pull plate 28, and one end of the second crank arm 18 is fixed with the first pin 16, and the first pin 16 is slidably connected in the strip through hole 17), so that the distance change between the second pin 26 and the first pin 16 can be adapted. When the first crank arm 27 and the second crank arm 18 are both swung downward, the first pin 16 slides along the strip through hole 17, and the first pin 16 also rotates relative to the strip sliding hole.

[0035] In this embodiment, the second crank arm 18 and the third crank arm 20 are combined into one crank arm. Figure 4 , 8 As shown in FIG. 9 , the middle portion of the crank arm is fixedly sleeved on the other end of the main shaft 29 , the left portion of the crank arm constitutes the second crank arm 18 , and the right portion of the crank arm constitutes the third crank arm 20 .

[0036] As described above, when the operating shaft 5 drives the second crank arm 18 to swing downward through the first crank arm 27 and the first pull plate 28, the main shaft 29 rotates and drives the opening and closing shaft of the permanent magnet mechanism to rotate to complete the opening. In this process, when the main shaft 29 rotates, the third crank arm 20 swings upward. As described above, since the connection line between the other end of the main shaft 29 and the other end of the rotating shaft 3 of the auxiliary switch 2, the third crank arm 20, the second pull plate 22 and the fourth crank arm 24 form a four-bar linkage, the third crank arm 20 can drive the second pull plate 22 to move upward, the second pull plate 22 can pull the fourth crank arm 24 to swing upward, and the fourth crank arm 24 can drive the fixed plate 25 and the rotating shaft 3 of the auxiliary switch 2 to rotate together. It can be seen that through the action of the first transmission structure and the second transmission structure, the operating shaft 5, the main shaft 29 and the rotating shaft 3 of the auxiliary switch 2 can rotate at the same time.

[0037] like Figure 1-3 5-8, the manual opening mechanism of the permanent magnetic circuit breaker of the utility model, wherein one end of the main shaft 29 is fixedly connected to a fixed shaft 9, the fixed shaft 9 is coaxially arranged with the main shaft 29, and a closing and opening indicator 10 is fixedly arranged on the fixed shaft 9. The closing and opening indicator 10 has two display gears, one for displaying the closing state and the other for displaying the opening state, so that it is convenient for the worker to intuitively judge the closing and opening state of the permanent magnetic mechanism in the gas box.

[0038] like Figure 1-9 As shown, the hand-opening mechanism of the permanent magnetic circuit breaker of the utility model, wherein the frame 8 includes a first frame plate 1, a second frame plate 11 and a third frame plate 12 which are arranged vertically, the second frame plate 11 and the third frame plate 12 are fixedly connected to the same side of the first frame plate 1, that is, the second frame plate 11 and the third frame plate 12 are fixedly connected to the rear side of the first frame plate 1, the second frame plate 11 and the third frame plate 12 are arranged oppositely and at intervals, and the first frame plate 1, the second frame plate 11 and the third frame plate 12 together form a U-shaped plate structure. A main shaft 29 is rotatably mounted on the first frame plate 1 through a bearing, and one side below the main shaft 29 ( Figure 1 An operating shaft 5 is rotatably mounted on the first frame plate 1 (on the right side below the main shaft 29 shown in the figure) through a bearing. Figure 1 An auxiliary switch 2 is mounted on the first frame plate 1 (shown below the left side of the main shaft 29), the other end of the operating shaft 5, the other end of the main shaft 29 and the other end of the rotating shaft 3 of the auxiliary switch 2 are all located in a space surrounded by the first frame plate 1, the second frame plate 11 and the third frame plate 12, and the first crank arm 27, the first pull plate 28, the second crank arm 18, the third crank arm 20, the second pull plate 22, the fourth crank arm 24 and the fixed plate 25 are also located in a space surrounded by the first frame plate 1, the second frame plate 11 and the third frame plate 12.

[0039] like Figure 1 , 3 As shown in 5-7, the manual release mechanism of the permanent magnetic circuit breaker of the utility model, wherein the bracket 7 includes a first bracket plate 6, a second bracket plate 13 and a third bracket plate 14, the first bracket plate 6 is arranged vertically, the second bracket plate 13 and the third bracket plate 14 are both fixedly connected to the same side of the first bracket plate 6 in the horizontal direction, that is, the second bracket plate 13 and the third bracket plate 14 are both fixedly connected to the rear side of the first bracket plate 6, the second bracket plate 13 and the third bracket plate 14 are opposite to each other and arranged at intervals up and down, the first bracket plate 6, the second bracket plate 13 and the third bracket plate 14 together form a U-shaped plate structure, the second bracket plate 13 and the third bracket plate 14 are both fixedly connected to the front side wall of the first frame plate 1, and one end of the operating shaft 5 passes through the first bracket plate 6 and is rotatably connected to the first bracket plate 6 through a bearing.

[0040] like Figure 6 , 7 As shown, one end (i.e., the front end) of the cylindrical torsion spring 15 is fixedly connected to the operating shaft 5, and the other end (i.e., the rear end) of the cylindrical torsion spring 15 is fixedly connected to the second bracket plate 13, the third bracket plate 14 or the first frame plate 1, that is, the torsion spring clamp is fixedly arranged on the operating shaft 5, and the torsion spring clamp block is fixedly arranged on the second bracket plate 13, the third bracket plate 14 or the first frame plate 1. In this way, when the operating shaft 5 rotates in the direction of opening the gate, the first crank arm 27 swings downward, that is, Figure 6 , 7 When the operating shaft 5 rotates counterclockwise, the operating shaft 5 drives the front end of the cylindrical torsion spring 15 to rotate together through the torsion spring clamp, and the rear end of the cylindrical torsion spring 15 is fixedly connected to the second bracket plate 13, the third bracket plate 14 or the first frame plate 1 through the torsion spring clamp, so the cylindrical torsion spring 15 can be tightened and stored. The specific structure and working principle of the cylindrical torsion spring 15 belong to the prior art and will not be described in detail here.

[0041] like Figure 1 , 5 -7 and 9 show the manual release mechanism of the permanent magnetic circuit breaker of the utility model, wherein one end of the operating shaft 5 is fixedly connected with an interlocking plate 4, and the interlocking plate 4 is located outside the space surrounded by the first bracket plate 6, the second bracket plate 13 and the third bracket plate 14, that is, the interlocking plate 4 is located in front of the first bracket plate 6. The interlocking plate 4 is used to connect the interlock between the permanent magnetic circuit breaker and the disconnector, thereby meeting the five-protection interlocking requirements of the switch cabinet.

[0042] like Figure 4 , 5 As shown in Figures 8 and 9, the manual opening mechanism of the permanent magnetic circuit breaker of the utility model, wherein the other end of the main shaft 29 is fixedly provided with a drive sleeve 19 for connecting to the permanent magnetic mechanism of the permanent magnetic circuit breaker, specifically, the drive sleeve 19 is connected to the opening and closing shaft of the permanent magnetic mechanism, so that the opening and closing shaft can rotate together with the main shaft 29.

[0043] like Figure 1-9 As shown, the manual tripping mechanism of the permanent magnetic circuit breaker of the utility model is used for emergency tripping of the permanent magnetic mechanism of the permanent magnetic circuit breaker when in use. The permanent magnetic mechanism of the permanent magnetic circuit breaker is arranged in the gas box, and the gas box is arranged in the switch cabinet. The manual tripping mechanism is arranged on the outer wall of the front plate of the gas box, that is, the second frame plate 11 and the third frame plate 12 of the frame 8 are fixedly arranged on the outer wall of the front plate of the gas box, the opening and closing shaft of the permanent magnetic mechanism is rotatably arranged on the front plate of the gas box, and a part of the opening and closing shaft extends to the outside of the front plate of the gas box, and the other end (i.e., the rear end) of the main shaft 29 of the manual tripping mechanism is coaxially fixedly connected with the part of the opening and closing shaft extending to the outside of the front plate of the gas box through the driving sleeve 19, so as to drive the opening and closing shaft to rotate, so as to achieve the purpose of manually opening the permanent magnetic mechanism.

[0044] When emergency opening is required, an external force is applied to one end (i.e., the front end) of the operating shaft 5 to rotate the operating shaft 5. Since one end of the cylindrical torsion spring 15 is fixedly connected to the operating shaft 5, and the other end of the cylindrical torsion spring 15 is fixedly connected to the bracket 7 or the frame 8, the operating shaft 5 drives the cylindrical torsion spring 15 to tighten and store energy. At the same time, the other end (i.e., the rear end) of the operating shaft 5 drives the main shaft 29 to rotate through the first transmission structure (the first crank arm 27, the first pull plate 28, and the second crank arm 18). In this process, the first The first crank arm 27 swings downward, the first pull plate 28 moves downward, the second crank arm 18 swings downward, and the main shaft 29 drives the fixed plate 25 and the rotating shaft 3 of the auxiliary switch 2 to rotate together through the second transmission structure (the third crank arm 20, the second pull plate 22 and the fourth crank arm 24). In this process, the third crank arm 20 swings upward, the second pull plate 22 moves upward, and the fourth crank arm 24 swings upward, that is, when the operating shaft 5 rotates, the main shaft 29 and the rotating shaft 3 of the auxiliary switch 2 can rotate with the operating shaft 5. When the main shaft 29 rotates with the operating shaft 5, the opening and closing shaft fixedly connected to the main shaft 29 also rotates, so that the opening can be completed; when the rotating shaft 3 of the auxiliary switch 2 rotates with the operating shaft 5, the connection state of the contact point of the auxiliary switch 2 changes, from the previous normally open contact to the normally closed contact, and the normally closed contact to the normally open contact, so that the auxiliary switch 2 can provide corresponding auxiliary contacts for the electrical interlock in the secondary circuit, and the opening and closing state of the permanent magnet mechanism can also be judged by the auxiliary switch 2.

[0045] When the switch is not needed, the external force applied to one end (i.e., the front end) of the operating shaft 5 is removed, and the cylindrical torsion spring 15 changes from the tightened state to the initial state and releases the stored energy. In this process, the cylindrical torsion spring 15 drives the operating shaft 5 to rotate in the opposite direction, and the operating shaft 5 drives the first crank arm 27 to swing upward, and the first crank arm 27 pushes the first pull plate 28 to move upward, and the first pull plate 28 pushes the second crank arm 18 to swing upward, so the main shaft 29 rotates in the opposite direction following the operating shaft 5, and at the same time, the main shaft 29 drives the third crank arm 20 to swing downward, and the third crank arm 20 pushes the second pull plate 22 to move downward, and the second pull plate 22 pushes the fourth crank arm 24 to swing downward, so the fixed plate 25 and the rotating shaft 3 of the auxiliary switch 2 rotate in the opposite direction together. That is to say, when the operating shaft 5 rotates in the opposite direction, the main shaft 29 and the rotating shaft 3 of the auxiliary switch 2 also rotate in the opposite direction following the operating shaft 5, until the operating shaft 5, the main shaft 29 and the rotating shaft 3 of the auxiliary switch 2 are restored to the initial state, waiting for the next switch-off operation.

[0046] It can be seen that the utility model has a simple structure and low cost, and the secondary circuit signal switching is designed by spring reset, so the reset reliability is high.

[0047] It should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "front", "back", "left", "right", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A manual release mechanism for a permanent magnetic circuit breaker, characterized in that: The invention comprises a frame, wherein a main shaft is rotatably mounted on the frame, an operating shaft is rotatably mounted on the frame on one side below the main shaft, an auxiliary switch is mounted on the frame on the other side below the main shaft, one end of the operating shaft, one end of the main shaft and one end of the rotating shaft of the auxiliary switch are all located on one side of the frame, the other end of the operating shaft, the other end of the main shaft and the other end of the rotating shaft of the auxiliary switch are all located on the other side of the frame, one end of the operating shaft passes through a bracket and is rotatably connected to the bracket, the bracket is fixed on the frame, a cylindrical torsion spring is sleeved on the operating shaft between the bracket and the frame, one end of the cylindrical torsion spring is fixedly connected to the operating shaft, the other end of the cylindrical torsion spring is fixedly connected to the bracket or the frame, the other end of the operating shaft is connected to the other end of the main shaft via a first transmission structure, and the other end of the main shaft is connected to the other end of the rotating shaft of the auxiliary switch via a second transmission structure. One end of the cylindrical torsion spring is fixedly connected to the operating shaft through a torsion spring clamp, and the torsion spring clamp is fixedly arranged on the operating shaft. A limiting hole is provided on the torsion spring clamp, and one end of the cylindrical torsion spring is fixedly inserted in the limiting hole. The other end of the cylindrical torsion spring is fixedly connected to the bracket or the frame through a torsion spring clamping block, and the torsion spring clamping block is fixedly arranged on the bracket or the frame. A limiting groove is provided on the torsion spring clamping block, and the other end of the cylindrical torsion spring is fixedly arranged in the limiting groove.

2. The manual release mechanism of the permanent magnetic circuit breaker according to claim 1 is characterized in that: The first transmission structure includes a first crank arm, a first pull plate and a second crank arm, one end of the first crank arm is fixedly connected to the other end of the operating shaft, the other end of the first crank arm is hinged to one end of the first pull plate, the other end of the first pull plate is movably connected to one end of the second crank arm, the other end of the second crank arm is fixedly connected to the other end of the main shaft, the other end of the operating shaft and the other end of the main shaft are respectively located on opposite sides of the first pull plate, the other end of the first pull plate is provided with a strip through hole arranged along the length direction of the first pull plate, one end of the second crank arm is fixedly provided with a first pin shaft, and the first pin shaft is slidably connected in the strip through hole.

3. The manual release mechanism of the permanent magnetic circuit breaker according to claim 2 is characterized in that: The second transmission structure includes a third crank arm, a second pull plate and a fourth crank arm, one end of the third crank arm is fixedly connected to the other end of the main shaft, the third crank arm and the second crank arm are arranged opposite to each other, the other end of the third crank arm is hinged to one end of the second pull plate, the other end of the second pull plate is hinged to one end of the fourth crank arm, the other end of the fourth crank arm is fixedly connected to the other end of the rotating shaft of the auxiliary switch, and the other end of the main shaft and the other end of the rotating shaft of the auxiliary switch are both located on the same side of the second pull plate.

4. The manual release mechanism of the permanent magnetic circuit breaker according to claim 3 is characterized in that: The other end of the rotating shaft of the auxiliary switch is fixedly connected to a fixing plate, the fixing plate is circular, the center of the fixing plate is fixedly connected to the other end of the rotating shaft of the auxiliary switch, the other end of the fourth turning arm is fixedly connected to the fixing plate, and the fourth turning arm is arranged along the radial direction of the fixing plate.

5. The manual release mechanism of the permanent magnetic circuit breaker according to claim 4 is characterized in that: The other end of the first crank arm is hinged to one end of the first pull plate through a second pin shaft, the other end of the third crank arm is hinged to one end of the second pull plate through a third pin shaft, and the other end of the second pull plate is hinged to one end of the fourth crank arm through a fourth pin shaft.

6. The manual release mechanism of the permanent magnetic circuit breaker according to claim 5, characterized in that: One end of the main shaft is fixedly connected with a fixed shaft, the fixed shaft is coaxially arranged with the main shaft, and a separation and combination indicator is fixedly provided on the fixed shaft.

7. The manual release mechanism of the permanent magnetic circuit breaker according to claim 6 is characterized in that: The frame includes a first frame plate, a second frame plate and a third frame plate, which are all arranged vertically, and the second frame plate and the third frame plate are fixedly connected to the same side of the first frame plate, and the second frame plate and the third frame plate are opposite to each other and arranged at a distance, and the first frame plate, the second frame plate and the third frame plate together form a U-shaped plate structure, and a main shaft is rotatably mounted on the first frame plate, and an operating shaft is rotatably mounted on the first frame plate on one side below the main shaft, and an auxiliary switch is mounted on the first frame plate on the other side below the main shaft, and the other end of the operating shaft, the other end of the main shaft and the other end of the rotating shaft of the auxiliary switch are all located in a space surrounded by the first frame plate, the second frame plate and the third frame plate, and the first crank arm, the first pull plate, the second crank arm, the third crank arm, the second pull plate, the fourth crank arm and the fixed plate are also located in a space surrounded by the first frame plate, the second frame plate and the third frame plate.

8. The manual release mechanism of the permanent magnetic circuit breaker according to claim 7 is characterized in that: The bracket includes a first bracket plate, a second bracket plate and a third bracket plate, the first bracket plate is arranged vertically, the second bracket plate and the third bracket plate are both fixedly connected to the same side of the first bracket plate in the horizontal direction, the second bracket plate and the third bracket plate are opposite to each other and arranged at intervals up and down, the first bracket plate, the second bracket plate and the third bracket plate together form a U-shaped plate structure, the second bracket plate and the third bracket plate are both fixedly connected to the first frame plate, one end of the operating shaft passes through the first bracket plate and is rotatably connected to the first bracket plate, and the torsion spring block is fixedly arranged on the second bracket plate, the third bracket plate or the first frame plate.

9. The manual release mechanism of the permanent magnetic circuit breaker according to claim 8, characterized in that: One end of the operating shaft is fixedly connected with an interlocking plate, and the interlocking plate is located outside the space surrounded by the first bracket plate, the second bracket plate and the third bracket plate.

10. The manual release mechanism of the permanent magnetic circuit breaker according to claim 9, characterized in that: The second crank arm and the third crank arm are combined into one crank arm, and the other end of the main shaft is fixedly provided with a driving sleeve for connecting with the permanent magnetic mechanism of the permanent magnetic circuit breaker.

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