Isolation Agency

Abstract

The application relates to an isolating mechanism, which comprises a frame, a grounding operation shaft and a switch operation shaft arranged on the frame, a first crank arranged on the grounding operation shaft, a second crank arranged on the switch operation shaft, an output shaft vertically arranged on the frame, a support arranged on the upper end of the output shaft and a switch opening and closing indicator arranged on the support, a support arranged on the lower end of the output shaft and adapted to be connected with a knife shaft of an isolating switch, a first energy storage spring with one end connected with the first crank and the other end connected with a first supporting column on the frame, a second energy storage spring with one end rotationally connected with the second crank and the other end connected with a second supporting column on the other side of the frame, and the first and second energy storage springs being arranged on the two sides of the frame respectively. The output shaft directly vertically penetrates the middle part of the support, the indicator arranged on the upper end of the output shaft can be directly rotated by the output shaft, the structure is more compact, and the operation is more stable and reliable.

Description

Technical Field

[0001] The present invention relates to an isolation mechanism. Background Art

[0002] The traditional isolation mechanism has a large depth (or thickness). When this isolation is installed on the side of the ring network cabinet, the overall width of the ring network cabinet is increased. According to the current market demand, the width dimension of the ring network cabinet needs to be reduced as much as possible. The isolation mechanism is a factor that affects the width dimension of the ring network cabinet. The applicant needs to find a way to reduce the depth dimension of its isolation mechanism.

[0003] For the traditional isolation mechanism, see the patent previously applied for by Jiangsu Luokai Electric Co., Ltd., patent application number: 202010418966.2, patent name: Three-position mechanism of load switch and its working method. In this isolation mechanism, its depth dimension is large. The reason is that: since only one energy storage spring is used in the isolation mechanism, the two ends of the energy storage spring are respectively connected to the upper crank arm and the lower crank arm. When the energy storage spring is working, it needs to swing horizontally in the middle area of ​​the bracket. This causes the upper indicator sign to transmit power to the lower output shaft through the first indicator shaft, the second indicator shaft and multiple gears, so that the opening and closing rotation of the lower output shaft can be transmitted to the upper indicator sign. The problems existing in the isolation mechanism are: the overall mechanism is complicated, it is more troublesome to assemble, and the mechanism has a large depth dimension;

[0004] In the prior patent, the first indicator shaft is connected to the upper side plate of the bracket, and the output shaft is connected to the lower side plate of the bracket. Since the output shaft is a short shaft, a support frame is required on the bracket to install the output shaft. Such an assembly structure increases the number of parts of the isolation mechanism and increases the depth dimension of the isolation mechanism. Secondly, a second indicator shaft and multiple gears need to be set between the indicator and the output shaft for transmission, which further increases the number of parts of the isolation mechanism.

[0005] Therefore, in summary, the existing isolation mechanism has the problems of complex structure, large number of parts, and large depth dimension of the isolation mechanism. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an isolation mechanism to solve the problems of the previous isolation mechanism having a complex structure, a large number of parts, and a large depth dimension.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] An isolation mechanism is provided, comprising

[0009] a frame, wherein a grounding operating shaft and a switch operating shaft are provided on the frame, a first crank arm is provided on the grounding operating shaft, and a second crank arm is provided on the switch operating shaft;

[0010] The output shaft is vertically arranged on the frame, with its upper end extending out of the bracket and mounted with the opening and closing indicator plate, and its lower end extending out of the bracket and suitable for connecting with the knife shaft of the disconnector;

[0011] a first energy storage spring, one end of which is connected to the first crank arm, and the other end of which is connected to the first support column on the frame;

[0012] a second energy storage spring, one end of which is rotatably connected to the second crank arm, and the other end of which is connected to the second support column on the other side of the frame;

[0013] The first energy storage spring and the second energy storage spring are respectively located on both sides of the frame.

[0014] Furthermore, the rack includes

[0015] An upper side plate, a lower side plate, and a plurality of connecting columns, each connecting column being connected between the upper side plate and the lower side plate;

[0016] The first supporting column is one of the connecting columns, and the second supporting column is the other connecting column.

[0017] Furthermore, a first cam is provided in an idle sleeve on the grounding operating shaft, and the first crank arm is adapted to drive the first cam to rotate in opening and closing;

[0018] A lock plate, one end of which is rotatably engaged with the frame via a pin shaft, and the other end of which is adapted to lock the first cam to restrict the first cam from rotating in the earthing and opening position. A torsion spring is provided on the pin shaft, and the torsion spring is adapted to drive the lock plate to rotate toward the first cam.

[0019] An unlocking pin, fixedly arranged on the first crank arm;

[0020] When the grounding operating shaft is in the grounding tripping position, the locking plate locks the first cam;

[0021] The grounding operating shaft drives the first crank arm to rotate to perform grounding closing. When the two fulcrums of the first energy storage spring and the grounding operating shaft are in the same straight line position, the unlocking pin pushes open the lock plate, and the lock plate releases the lock on the first cam.

[0022] Furthermore, a mounting plate is provided below the rack.

[0023] The beneficial effects of the present invention are:

[0024] The isolation mechanism of the present invention has been re-optimized in structure. The two crank arms are respectively equipped with an energy storage spring to perform energy storage operations. The two energy storage springs are respectively located on both sides of the bracket, thereby freeing up an area in the middle of the bracket for installing an output shaft. The output shaft is a long axis, and the output shaft directly passes through the middle of the bracket vertically. The indicator sign installed at the upper end of the output shaft can be directly driven to rotate by the output shaft. The structure is more streamlined and the operation is more stable and reliable.

[0025] In the isolation mechanism, a locking plate locks the first cam in the grounded, open position until the first crank arm rotates to the point where the two fulcrums of the first energy storage spring and the grounding operating shaft are aligned. At this point, the unlocking pin pushes open the locking plate, releasing the lock on the first cam. Locking the first cam with the locking plate prevents the disconnector's blade shaft from rotating downward due to gravity during rotation of the grounding operating shaft from the grounded, open position to the grounded, closed position, thereby improving the safety of the entire circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 is a schematic diagram of the isolation mechanism of the present invention;

[0028] Figure 2 This is a schematic diagram of the isolation mechanism of the present invention in the grounded and open position;

[0029] Figure 3 This is a schematic diagram of the isolation mechanism of the present invention in a three-point-one-line position;

[0030] Figure 4 This is a schematic diagram of the isolation mechanism of the present invention in the grounded closed position;

[0031] Among them, 2, bracket, 21, upper side plate, 22, lower side plate, 23, connecting column, 231, first support column, 232, second support column, 24, mounting plate;

[0032] 3. Grounding operating shaft, 31. First crank arm, 32. First cam, 33. First energy storage spring, 34. First stop pin;

[0033] 4. Switch operating shaft, 41. Second crank arm, 42. Second cam, 43. Second energy storage spring;

[0034] 5. Output shaft, 51. Indicator plate, 52. Output cam; 6. Lock plate, 61. Unlocking pin. DETAILED DESCRIPTION

[0035] The present invention will now be further described with reference to the accompanying drawings, which are simplified schematic diagrams illustrating the basic structure of the present invention in a schematic manner, and thus only show components related to the present invention.

[0036] like Figures 1 to 4 As shown, an isolation mechanism includes

[0037] A frame, on which a grounding operating shaft 3 and a switch operating shaft 4 are provided, wherein a first crank arm 31 is provided on the grounding operating shaft 3, and a second crank arm 41 is provided on the switch operating shaft 4;

[0038] The output shaft 5 is vertically arranged on the frame, with its upper end extending out of the bracket 2 and mounted with the opening and closing indicator 51, and its lower end extending out of the bracket 2 and suitable for connecting with the knife shaft of the disconnector;

[0039] A first energy storage spring 33, one end of which is connected to the first crank arm 31, and the other end of which is connected to the first support column 231 on the frame;

[0040] A second energy storage spring 43, one end of which is rotatably connected to the second crank arm 41, and the other end of which is connected to the second support column 232 on the other side of the frame;

[0041] The first energy storage spring 33 and the second energy storage spring 43 are respectively located on both sides of the frame.

[0042] Specifically, as an optional implementation in this embodiment, Figures 1 to 4 As shown, the rack includes

[0043] An upper side plate 21, a lower side plate 22 and a plurality of connecting columns 23, each connecting column 23 being connected between the upper side plate 21 and the lower side plate 22;

[0044] The first supporting column 231 is one of the connecting columns 23 , and the second supporting column 232 is another of the connecting columns 23 .

[0045] Specifically, as an optional implementation in this embodiment, Figures 1 to 4 As shown, the grounding operating shaft 3 is provided with a first cam 32 in an empty sleeve, and the first crank arm 31 is suitable for driving the first cam 32 to rotate to open or close the switch;

[0046] The lock plate 6 has one end that is rotatably engaged with the frame via a pin shaft, and the other end of the lock plate 6 is adapted to lock the first cam 32 to restrict the first cam 32 from rotating in the earthing and opening position. A torsion spring is provided on the pin shaft, and the torsion spring is adapted to drive the lock plate 6 to rotate toward the first cam 32.

[0047] An unlocking pin 61 is fixedly disposed on the first crank arm 31;

[0048] When the grounding operating shaft 3 is in the grounding tripping position, the locking plate 6 locks the first cam 32;

[0049] The grounding operation shaft 3 drives the first crank arm 31 to rotate for grounding closing. When the two fulcrums of the first energy storage spring 33 and the grounding operation shaft 3 are in the same straight line position, the unlocking pin 61 pushes open the lock plate 6, and the lock plate 6 releases the lock on the first cam 32.

[0050] Specifically, as an optional implementation in this embodiment, Figures 1 to 4 As shown, a mounting plate 24 is provided below the frame. The mounting plate 24 is connected to the lower side plate 22 via a plurality of pins. The isolation mechanism is connected to the ring main unit cabinet via the mounting plate 24.

[0051] In this embodiment, the energy storage spring is an existing product, see the prior patent, patent name: Energy storage spring and its load switch, patent number: CN201921186249.0; a pin is used to form a rotational connection between one end and the crank arm, and a support is formed between the other end and the support column.

[0052] In the isolation mechanism, an output cam 52 is provided on the output shaft 5, and the output shaft 5 drives the output cam 52 to rotate. The first cam 32 is loosely sleeved on the grounding operating shaft 3, and the second cam 42 is loosely sleeved on the switch operating shaft 4. The first crank arm 31 can drive the first cam 32 to rotate through the first stop pin 34 when rotating to open and close the switch, and the second crank arm 41 can drive the second cam 42 to rotate through the second stop pin when rotating to open and close the switch. The output cam 52 and the first cam 32 and the second cam 42 are also matched with each other through the stop pin; the transmission structure between the first crank arm 31, the second crank arm 41, the first cam 32, the second cam 42 and the output cam 52 are all existing technologies, and reference can be made to the prior patents cited in the background technology. This part of the structure has not been improved in this patent application. The improved part is to change the output shaft 5 in the previous isolation mechanism from a short axis to the current long axis, so that the output shaft 5 can directly drive the indicator sign 51 to rotate.

[0053] The isolation mechanism of the present invention can be made smaller in depth after the structure is re-optimized. The conveying shaft can rotate with the bracket 2 through two bearings, and the indicator plate 51 is directly installed on the upper end.

[0054] like Figure 2As shown, the grounding operating shaft 3 is point A, the connection point between the first energy storage spring 33 and the first crank arm 31 is point B, and the support position between the first energy storage spring 33 and the bracket 2 is point C. When the grounding operating shaft 3 is in the open position, point B is located on one side of the AC line. At this time, the locking plate 6 locks the first cam 32, and the first cam 32 cannot rotate. When the grounding operating shaft 3 drives the first crank arm 31 to start rotating clockwise to perform the grounding closing operation, the first energy storage spring 33 starts to store energy, and the first stop pin 34 on the first crank arm 31 disengages from the first cam 32. At this time, since the locking plate 6 locks the first cam 32, the first cam 32 remains stationary, and the first cam 32 drives the output cam 52 to remain stationary. The output cam 52 drives the knife shaft in the disconnector to remain stationary through the output shaft 5, thereby preventing the isolation knife on the knife shaft from falling down due to gravity; as the first crank arm 31 rotates, when point B rotates to the AC line, as shown Figure 3 As shown, the unlocking pin 61 on the first crank arm 31 pushes the lock plate 6, the lock plate 6 rotates, and the first cam 32 is unlocked. Then, after point B passes through the three-point line position, that is, point B reaches the other side of line AC, as shown in FIG. Figure 4 As shown, the first energy storage spring 33 begins to release energy, and the first crank arm 31 drives the first cam 32 to rotate through the first stop pin 34.

[0055] In the past, when there was no locking plate 6 to lock the first cam 32, the first crank arm 31 rotated to drive the first stop pin 34 to leave the first cam 32. The first cam 32 would rotate as it was free from the restriction of the first stop pin 34, and the knife shaft in the isolating switch would rotate under the influence of the gravity of the isolating knife.

[0056] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. An isolation mechanism, characterized in that: include a frame, wherein a grounding operating shaft and a switch operating shaft are provided on the frame, a first crank arm is provided on the grounding operating shaft, and a second crank arm is provided on the switch operating shaft; The output shaft is vertically arranged on the frame, with its upper end extending out of the bracket and mounted with the opening and closing indicator plate, and its lower end extending out of the bracket and suitable for connecting with the knife shaft of the disconnector; a first energy storage spring, one end of which is connected to the first crank arm, and the other end of which is connected to the first support column on the frame; a second energy storage spring, one end of which is rotatably connected to the second crank arm, and the other end of which is connected to the second support column on the other side of the frame; The first energy storage spring and the second energy storage spring are respectively located on both sides of the frame; The rack includes An upper side plate, a lower side plate, and a plurality of connecting columns, each connecting column being connected between the upper side plate and the lower side plate; The first supporting column is one of the connecting columns, and the second supporting column is the other connecting column; A first cam is provided on the idle sleeve of the grounding operating shaft, and the first crank arm is suitable for driving the first cam to rotate to open or close the switch; A lock plate, one end of which is rotatably engaged with the frame via a pin shaft, and the other end of which is adapted to lock the first cam to restrict the first cam from rotating in the earthing and opening position. A torsion spring is provided on the pin shaft, and the torsion spring is adapted to drive the lock plate to rotate toward the first cam. An unlocking pin, fixedly arranged on the first crank arm; When the grounding operating shaft is in the grounding tripping position, the locking plate locks the first cam; The grounding operating shaft drives the first crank arm to rotate to perform grounding closing. When the two fulcrums of the first energy storage spring and the grounding operating shaft are in the same straight line position, the unlocking pin pushes open the lock plate, and the lock plate releases the lock on the first cam.

2. The isolation mechanism according to claim 1, wherein: A mounting plate is provided below the frame.

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