A double-acting arc extinguishing chamber with energy storage device

Abstract

The present invention relates to the field of circuit breaker arc extinguishing devices, and in particular to a double-acting arc extinguishing chamber with an energy storage device, comprising an arc extinguishing chamber housing, a lifting assembly, an energy storage assembly, an active end assembly and a static connecting rod, wherein the active end assembly comprises a dynamic connecting rod, an active rack, a transmission gear and an extension member, wherein the transmission gear meshes with the active rack, and the transmission gear is arranged between the dynamic connecting rod and the static connecting rod; the lifting assembly comprises a lifting rack, a fork member and a bracket, and the energy storage assembly is arranged between the bracket on the static connecting rod and the inner wall of the arc extinguishing chamber housing; when closing the circuit breaker, the extension member contacts the fork member to drive the fork member to contact the lifting rack, the lifting rack meshes with the transmission gear, the locking device is in a locked state, the energy storage assembly is in an energy storage state, and the first elastic member is in a compressed state. The double-acting arc extinguishing chamber of the present invention is divided into two stages: normal speed and acceleration in the opening stage, and the intervention timing in the acceleration stage is adjustable, the breaking response is faster, and the arc duration is shortened.

Description

Technical Field

[0001] The invention relates to the field of arc extinguishing devices for circuit breakers, in particular to a double-acting arc extinguishing chamber with an energy storage device. Background Art

[0002] As the core component of the circuit breaker, the arc extinguishing chamber has important significance in terms of arc extinguishing capacity, operating power requirements, and space occupancy. Improving the opening speed is an important way to improve the arc extinguishing capacity.

[0003] In order to improve the arc extinguishing capacity of the arc extinguishing chamber, a double-acting arc extinguishing chamber is proposed. In the process of opening and closing of the existing double-acting arc extinguishing chamber, the active end and the driven end are usually linked throughout the process, such as connecting rod structure, gear structure, gear fork, hydraulic structure, etc., and the opening speed is significantly improved, but in high-voltage working conditions, a faster breaking speed may be required. The double-acting structure usually does not have an energy storage component in the circuit breaker cavity, and in the opening process, the driven end relies on the active end to provide power throughout the process. The response speed of the static arc contact is limited by the active end, and the opening speed still has room for improvement. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a double-acting arc extinguishing chamber with an energy storage device.

[0005] The present invention is achieved through the following technical solutions:

[0006] A double-acting arc extinguishing chamber with an energy storage device, comprising an arc extinguishing chamber housing, a lifting assembly, an energy storage assembly, an active end assembly and a static connecting rod, wherein the active end assembly comprises a dynamic connecting rod, an active rack, a transmission gear and an extension member, wherein the extension member comprises a first extension rod and a second extension rod, wherein the dynamic connecting rod and the static connecting rod are arranged in parallel and slidingly inside the arc extinguishing chamber housing, wherein the active rack is arranged on the dynamic connecting rod, wherein the transmission gear is meshed with the active rack, and wherein the transmission gear is arranged between the dynamic connecting rod and the static connecting rod; wherein the lifting assembly comprises a lifting rack, a shift fork member and a bracket, wherein the bracket is connected to the static connecting rod, and wherein the shift fork member comprises a first extension rod and a second extension rod, wherein the first extension rod and the second extension rod are arranged in parallel and slidingly inside the arc extinguishing chamber housing ... A shift fork and a second shift fork, the first shift fork and the second shift fork are both rotatably connected to the bracket, the lifting rack is slidably connected to the bracket up and down, a locking device is provided between the lifting rack and the shift fork member, a first elastic member is provided between the lower end of the lifting rack and the bracket, and the extension direction of the first elastic member is consistent with the sliding direction of the lifting rack; the energy storage component is arranged between the upper bracket of the static connecting rod and the inner wall of the arc extinguishing chamber shell; when closing the switch, the extension member drives the shift fork member to contact the lifting rack, the lifting rack is meshed with the transmission gear, the locking device is in a locked state, the energy storage component is in an energy storage state, and the first elastic member is in a compressed state.

[0007] Preferably, a shift block is provided between the bottom of the first shift fork and the bottom of the first shift fork, a shift block base is provided on the bracket, the bottom of the shift block and the top of the lifting rack are both wavy; when the switch is closed, the wave crest of the shift block contacts the wave crest of the lifting rack, and the locking device is arranged between the bottom of the shift block and the top of the lifting rack.

[0008] Preferably, the locking device includes a second elastic member, a positioning protrusion and a positioning groove, a mounting hole is provided at the crest of the shift block, the telescopic axis of the second elastic member is parallel to the axis of the mounting hole, one end of the second elastic member is connected to the inner wall of the mounting hole, and the other end is connected to the positioning protrusion, the positioning protrusion is arranged at the crest of the shift block, and the positioning groove is arranged at the crest of the lifting rack; when the switch is closed, the positioning protrusion is located in the positioning groove.

[0009] Preferably, the sum of the height of the positioning protrusion and the length of the second elastic member is greater than the depth of the mounting hole.

[0010] Preferably, the depth of the positioning groove is smaller than the height of the positioning protrusion.

[0011] Preferably, the first shift fork includes a first mounting rod, a first toggle rod and a first limiting member, the first mounting rod is rotatably connected to the bracket, one end of the first mounting rod is rotatably connected to the toggle block, and the other end is connected to the first toggle rod through a torsion spring, and the first limiting member is used to limit the rotation angle of the first toggle rod; the second shift fork includes a second mounting rod, a second toggle rod and a second limiting member, the connection method between the second mounting rod, the second toggle rod, the bracket and the toggle block is consistent with the connection method between the first mounting rod, the first toggle rod, the bracket and the toggle block, and the second limiting member is used to limit the rotation angle of the second toggle rod.

[0012] Preferably, the first limit member includes a first limit rod and a first limit block, the first limit rod is connected to one end of the first toggle rod close to the first mounting rod, the first limit block is arranged on the first mounting rod, and the first limit block is located on the rotation radius of the first limit rod; the second limit member includes a second limit rod and a second limit block, the second limit rod is connected to one end of the second toggle rod close to the second mounting rod, the second limit block is arranged on the second mounting rod, the second limit block is located on the rotation radius of the second limit rod, and the second limit rod and the first limit rod are both located between the first mounting rod and the second mounting rod.

[0013] Preferably, the first extension rod is detachably connected to the moving connecting rod.

[0014] Preferably, the energy storage assembly includes a limit ring and an energy storage elastic member, the limit ring is arranged on the static connecting rod, the energy storage elastic member is sleeved and slidably connected to the static connecting rod, and the energy storage elastic member is located between the limit ring and the inner wall of the arc extinguishing chamber shell.

[0015] Preferably, the limiting ring is detachably connected to the static connecting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A double-acting arc extinguishing chamber with an energy storage device of the present invention realizes the connection between the active end component and the static connecting rod by arranging a first fork member, a second fork and a lifting gear, thereby realizing the connection and separation of the dynamic connecting rod and the static connecting rod, and an energy storage component is arranged on the static connecting rod to adjust the response performance of the driven end, which has the effect of reducing the opening operation work.

[0018] When the switch is closed, the moving link moves to the left, the first extension rod pushes the second fork to rotate counterclockwise, the second fork triggers the lifting rack to be in the rising state, and meshes with the transmission gear, thereby realizing the linkage of the active rack, the transmission gear and the lifting rack, making the static link move to the right, and the energy storage assembly starts to store energy. The locking device is to ensure the meshing of the lifting rack and the transmission gear.

[0019] The opening process is divided into a normal speed stage and an acceleration stage, with a faster breaking response, which improves the breaking speed of the existing double-acting arc extinguishing chamber. When opening, the moving link moves to the right, and the static link moves to the left under the transmission of the transmission gear and the lifting rack, which is in the normal speed stage.

[0020] Until the second extension rod contacts the first fork, the lifting rack is triggered to change from the rising state to the falling state. At this time, the transmission gear is separated from the lifting rack, and the energy storage component releases energy, causing the static connecting rod to accelerate to the left in an instant, thereby achieving rapid separation of the static contact and the moving contact.

[0021] Furthermore, the function of the shift block base is to resist the elastic force generated by the first elastic member on the lifting rack when the switch is closed, so as to ensure the continuous meshing of the lifting rack and the transmission gear. When the switch is closed, the wave crest of the shift block contacts the wave crest of the lifting rack, and under the action of the shift block base, the lifting rack rises and connects with the transmission gear.

[0022] Furthermore, when the switch is closed, the positioning protrusion is located in the positioning groove.

[0023] Furthermore, the depth of the positioning groove is smaller than the height of the positioning protrusion so as to facilitate the disengagement of the positioning protrusion from the positioning groove when the gate is opened. When the gate is opened, when the second extension rod contacts the first fork, the positioning protrusion disengages from the positioning groove, the crest of the shift block contacts the trough of the lifting rack, and the lifting rack changes from the lowering state to the rising state under the rebound action of the first elastic member, thereby realizing the separation of the lifting rack and the transmission gear.

[0024] Furthermore, the first mounting rod is used to connect the shift block and the first toggle rod. When the gate is opened, the first toggle rod contacts the extension rod, and the first toggle rod becomes a whole with the first mounting rod under the limitation of the first limit member, so that the first mounting rod drives the shift block to rotate, so that the shift block and the wave crest move from the wave crest of the lifting rack to the wave trough of the lifting rack, thereby realizing the rising of the lifting rack, realizing the separation of the lifting rack and the transmission gear, and realizing deceleration.

[0025] When the switch is closed, the second toggle rod contacts the second extension rod, and the second toggle rod becomes a whole with the second mounting rod under the limitation of the second limit piece, so that the second mounting rod drives the toggle block to rotate, so that the crest of the toggle block moves from the trough of the lifting rack to the crest of the lifting rack, thereby realizing the lowering of the lifting rack, so that the lifting rack engages with the transmission gear to realize transmission.

[0026] Furthermore, the first extension rod is detachably connected to the moving link, so as to flexibly adjust the intervention timing in the opening acceleration stage.

[0027] Furthermore, the limiting ring is used to install the energy storage elastic member. When the switch is closed, the limiting ring generates pressure on the energy storage elastic member, and the energy storage elastic member is compressed along the axial direction to generate elastic potential energy and realize energy storage.

[0028] Furthermore, the detachable connection between the limit ring and the static connecting rod is to facilitate the replacement of the energy storage elastic member and adjust the storage energy of the energy storage elastic member, thereby achieving the adjustment of the response performance of the driven end. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the closing of a double-acting arc extinguishing chamber with an energy storage device according to the present invention;

[0030] Figure 2 A schematic diagram of the opening of a double-acting arc extinguishing chamber with an energy storage device according to the present invention;

[0031] Figure 3 It is a schematic diagram of a first shift fork of a double-acting arc extinguishing chamber with an energy storage device according to the present invention;

[0032] Figure 4 It is a schematic diagram of a second shift fork of a double-acting arc extinguishing chamber with an energy storage device according to the present invention;

[0033] Figure 5 The diagram is a closing diagram of a shifting block and a lifting rack of a double-acting arc extinguishing chamber with an energy storage device according to the present invention.

[0034] In the figure, 1, the first extension rod; 2, the static connecting rod; 3, the bracket; 4, the first shift fork; 41, the first mounting rod; 42, the first toggle rod; 43, the first limiting rod; 44, the first limiting block; 5, the gear bracket; 6, the second extension rod; 7, the shift block; 8, the energy storage elastic member; 9, the limiting ring; 10, the second shift fork; 101, the second mounting rod; 102, the second toggle rod; 103, the second limiting rod; 104, the second limiting block; 11, the lifting rack; 12, the transmission gear; 13, the moving connecting rod; 14, the first elastic member; 15, the positioning protrusion; 16, the positioning groove; 17, the second elastic member; 18, the shift block base. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0036] The present invention discloses a double-acting arc extinguishing chamber with an energy storage device, referring to Figure 1 , including an arc extinguishing chamber housing, a lifting assembly, an energy storage assembly, an active end assembly and a static connecting rod 2, the active end assembly includes a moving connecting rod 13, an active rack, a transmission gear 12 and an extension piece, the moving connecting rod 13 and the static connecting rod 2 are arranged in parallel and sliding inside the arc extinguishing chamber housing, the active rack is arranged on the moving connecting rod 13 by bolts, the transmission gear 12 is meshed with the active rack, the extension piece includes a first extension rod 1 and a second extension rod 6, the first extension rod 1 is detachably connected to the moving connecting rod 13, in this embodiment, the first extension rod 1 and the second extension rod 6 are both bolted to the moving connecting rod 13, and are both L-shaped.

[0037] The transmission gear 12 is fixedly arranged between the moving link 13 and the static link 2 through the gear bracket 5. The lifting assembly includes a lifting rack 11, a fork member and a bracket 3, and the bracket 3 is connected to the static link 2 by bolts. The fork member includes a first fork 4 and a second fork 10 arranged at intervals, and the first fork 4 and the second fork 10 are both rotatably connected to the bracket 3.

[0038] The first shift fork 4 includes a first mounting rod 41, a first toggle rod 42 and a first limit piece. The first mounting rod 41 is rotatably connected to the bracket 3 through a pin shaft. One end of the first mounting rod 41 is rotatably connected to the shift block 7 through a pin shaft, and the other end is connected to the first toggle rod 42 through a torsion spring. The first limit piece is used to limit the rotation angle of the first toggle rod 42; the first limit piece includes a first limit rod 43 and a first limit block 44. The first limit rod 43 is connected to one end of the first toggle rod 42 close to the first mounting rod 41, and the first limit block 44 is arranged on the first mounting rod 41. The first limit block 44 is located on the rotation radius of the first limit rod 43.

[0039] The second shift fork 10 includes a second mounting rod 101, a second toggle rod 102 and a second limiter. The connection method between the second mounting rod 101, the second toggle rod 102, the bracket 3 and the shift block 7 is consistent with the connection method between the first mounting rod 41, the first toggle rod 42, the bracket 3 and the shift block 7. The second limiter is used to limit the rotation angle of the second toggle rod 102.

[0040] The second limiting member includes a second limiting rod 103 and a second limiting block 104. The second limiting rod 103 is connected to one end of the second toggle rod 102 close to the second mounting rod 101. The second limiting block 104 is arranged on the second mounting rod 101. The second limiting block 104 is located on the rotation radius of the second limiting rod 103. The second limiting rod 103 and the first limiting rod 43 are both located between the first mounting rod 41 and the second mounting rod 101.

[0041] A shift block 7 is provided between the bottom of the first shift fork 4 and the bottom of the first shift fork 4, and a shift block base 18 is provided on the bracket 3. The bottom of the shift block 7 and the top of the lifting rack 11 are both wavy; when the switch is closed, the wave crest of the shift block 7 contacts the wave crest of the lifting rack 11.

[0042] The lifting rack 11 is connected to the bracket 3 for sliding up and down. In this embodiment, the bracket 3 is door-shaped, and a sliding groove is provided on the door-shaped side frame of the bracket 3. A sliding rod is provided at the end of the lifting rack 11, and the sliding rod is slidably provided in the sliding groove. A first elastic member 14 is provided between the lower end of the lifting rack 11 and the bracket 3, and the expansion and contraction direction of the first elastic member 14 is consistent with the sliding direction of the lifting rack 11.

[0043] Reference Figure 2 A locking device is provided between the bottom of the shift block 7 and the top of the lifting rack 11. The locking device includes a second elastic member 17, a positioning protrusion 15 and a positioning groove 16. A mounting hole is provided at the crest of the shift block 7. The telescopic axis of the second elastic member 17 is parallel to the axis of the mounting hole. One end of the second elastic member 17 is connected to the inner wall of the mounting hole, and the other end is connected to the positioning protrusion 15. The positioning protrusion 15 is provided at the crest of the shift block 7, and the positioning groove 16 is provided at the crest of the lifting rack 11. When the switch is closed, the positioning protrusion 15 is located in the positioning groove 16, so that the shift block. In this embodiment, the positioning protrusion 15 is spherical, and the depth of the positioning groove 16 is less than the radius of the positioning protrusion 15. There are multiple positioning protrusions 15 and positioning grooves 16.

[0044] The energy storage assembly is arranged between the bracket 3 on the static connecting rod 2 and the inner wall of the arc extinguishing chamber housing. The energy storage assembly includes a limit ring 9 and an energy storage elastic member 8. The limit ring 9 is detachably connected to the static connecting rod 2. The energy storage elastic member 8 is sleeved and slidably connected to the static connecting rod 2. The energy storage elastic member 8 is located between the limit ring 9 and the inner wall of the arc extinguishing chamber housing. In this embodiment, the limit ring 9 is bolted to the static connecting rod 2. The energy storage elastic member 8 is a spring, and can also be a structure such as an air cavity or a disc spring.

[0045] The implementation principle of a double-acting arc extinguishing chamber with an energy storage device of the present invention is:

[0046] Reference Figure 1 When the switch is closed, the moving link 13 moves to the left, and the first extension rod 1 pushes the second toggle rod 102 to rotate counterclockwise. When the second limit rod 103 on the second toggle rod contacts the second limit block 104 on the second mounting rod 101, the second toggle rod and the second mounting rod 101 become a whole, so that the second mounting rod 101 drives the shift block 7 to rotate, so that the wave crest of the shift block 7 moves from the wave trough of the lifting rack 11 to the wave crest of the lifting rack 11, and the positioning protrusion 15 is located in the positioning groove 16, thereby realizing the lowering of the lifting rack 11, so that the lifting rack 11 is meshed with the transmission gear 12 to realize transmission, so that the static link 2 moves to the right, and the energy storage assembly starts to store energy.

[0047] Reference Figure 2 The opening process is divided into a normal speed stage and an acceleration stage. When opening, the moving link 13 moves to the right, and the static link 2 moves to the left under the transmission action of the transmission gear 12 and the lifting rack 11, which is in the normal speed stage.

[0048] Until the second extension rod 6 contacts the first shift fork 4, the second extension rod 6 pushes the first shift rod 42 to rotate clockwise, the positioning protrusion 15 disengages from the positioning groove 16, and the first shift rod 42 becomes a whole with the first mounting rod 41 under the limitation of the first limit member, so that the first mounting rod 41 drives the shift block 7 to rotate, and the crest of the shift block 7 contacts the trough of the lifting rack 11. The lifting rack 11 changes from the falling state to the rising state under the rebound action of the first elastic member 14. At this time, the transmission gear 12 is separated from the lifting rack 11, and the energy storage elastic member 8 releases energy, so that the static connecting rod 2 accelerates to the left in an instant, thereby realizing the rapid separation of the static contact and the moving contact.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. A double-acting arc extinguishing chamber with an energy storage device, characterized in that: The invention comprises an arc extinguishing chamber housing, a lifting assembly, an energy storage assembly, an active end assembly and a static connecting rod (2); the active end assembly comprises a dynamic connecting rod (13), an active rack, a transmission gear (12) and an extension member; the extension member comprises a first extension rod (1) and a second extension rod (6); the dynamic connecting rod (13) and the static connecting rod (2) are arranged in parallel and sliding manner inside the arc extinguishing chamber housing; the active rack is arranged on the dynamic connecting rod (13); the transmission gear (12) is meshed with the active rack; the transmission gear (12) is arranged between the dynamic connecting rod (13) and the static connecting rod (2); the lifting assembly comprises a lifting rack (11), a shift fork member and a bracket (3); the bracket (3) is connected to the static connecting rod (2); the shift fork member comprises a first shift fork (4) and a second shift fork (10) arranged at intervals , the first shift fork (4) and the second shift fork (10) are both rotatably connected to the bracket (3), the lifting rack (11) is slidably connected to the bracket (3) up and down, a locking device is provided between the lifting rack (11) and the shift fork member, a first elastic member (14) is provided between the lower end of the lifting rack (11) and the bracket (3), and the extension direction of the first elastic member (14) is consistent with the sliding direction of the lifting rack (11); the energy storage component is arranged between the bracket (3) on the static connecting rod (2) and the inner wall of the arc extinguishing chamber shell; when the switch is closed, the extension member drives the shift fork member to contact the lifting rack (11), the lifting rack (11) is meshed with the transmission gear (12), the locking device is in a locked state, the energy storage component is in an energy storage state, and the first elastic member (14) is in a compressed state; A shift block (7) is provided between the bottom of the first shift fork (4) and the bottom of the second shift fork (10), a shift block base (18) is provided on the bracket (3), the bottom of the shift block (7) and the top of the lifting rack (11) are both wavy; when the switch is closed, the wave crest of the shift block (7) contacts the wave crest of the lifting rack (11), and the locking device is arranged between the bottom of the shift block (7) and the top of the lifting rack (11).

2. The double-acting arc extinguishing chamber with energy storage device according to claim 1, characterized in that: The locking device comprises a second elastic member (17), a positioning protrusion (15) and a positioning groove (16); a mounting hole is provided at the wave crest of the shift block (7); the telescopic axis of the second elastic member (17) is parallel to the axis of the mounting hole; one end of the second elastic member (17) is connected to the inner wall of the mounting hole, and the other end is connected to the positioning protrusion (15); the positioning protrusion (15) is arranged at the wave crest of the shift block (7); and the positioning groove (16) is arranged at the wave crest of the lifting rack (11); the elastic coefficient of the second elastic member (17) is greater than or equal to the elastic coefficient of the first elastic member (14); when the switch is closed, the positioning protrusion (15) is located in the positioning groove (16).

3. The double-acting arc extinguishing chamber with energy storage device according to claim 2, characterized in that: The sum of the height of the positioning protrusion (15) and the length of the second elastic member (17) is greater than the depth of the mounting hole.

4. The double-acting arc extinguishing chamber with energy storage device according to claim 2, characterized in that: The depth of the positioning groove (16) is smaller than the height of the positioning protrusion (15).

5. The double-acting arc extinguishing chamber with energy storage device according to claim 1, characterized in that: The first shift fork (4) comprises a first mounting rod (41), a first toggle rod (42) and a first limiting member, the first mounting rod (41) is rotatably connected to the bracket (3), one end of the first mounting rod (41) is rotatably connected to the toggle block (7), and the other end is connected to the first toggle rod (42) via a torsion spring, and the first limiting member is used to limit the rotation angle of the first toggle rod (42); the second shift fork (10) comprises a second mounting rod (101), a second toggle rod (102) and a second limiting member, the connection mode between the second mounting rod (101), the second toggle rod (102), the bracket (3) and the toggle block (7) is consistent with the connection mode between the first mounting rod (41), the first toggle rod (42), the bracket (3) and the toggle block (7), and the second limiting member is used to limit the rotation angle of the second toggle rod (102).

6. The double-acting arc extinguishing chamber with energy storage device according to claim 5, characterized in that: The first limiting member comprises a first limiting rod (43) and a first limiting block (44); the first limiting rod (43) is connected to one end of the first toggle rod (42) close to the first mounting rod (41); the first limiting block (44) is arranged on the first mounting rod (41); the first limiting block (44) is located on the rotation radius of the first limiting rod (43); the second limiting member comprises a second limiting rod (103) and a second limiting block (104); the second limiting rod (103) The second limit block (104) is connected to one end of the second toggle rod (102) close to the second mounting rod (101), the second limit block (104) is arranged on the second mounting rod (101), the second limit block (104) is located on the rotation radius of the second limit rod (103), the first limit rod (43) is located on a side of the first toggle rod (42) close to the second mounting rod (101), and the second limit rod (103) is located on a side of the second toggle rod (102) close to the first mounting rod (41).

7. The double-acting arc extinguishing chamber with energy storage device according to claim 1, characterized in that: The first extension rod (1) is detachably connected to the moving connecting rod (13).

8. The double-acting arc extinguishing chamber with energy storage device according to claim 1, characterized in that: The energy storage component comprises a limit ring (9) and an energy storage elastic member (8); the limit ring (9) is arranged on the static connecting rod (2); the energy storage elastic member (8) is sleeved and slidably connected to the static connecting rod (2); and the energy storage elastic member (8) is located between the limit ring (9) and the inner wall of the arc extinguishing chamber shell.

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