CN211828612U - Movable conducting block assembly for vacuum switch tube and circuit breaker comprising same - Google Patents

Abstract

The utility model provides a move conducting block subassembly and including its circuit breaker for vacuum switch tube, the external screw thread has on the end of moving of vacuum switch tube, it includes to move the conducting block subassembly: the conductive clamp module is provided with a first end face and a second end face which are oppositely arranged, and a threaded through hole which penetrates through the first end face and the second end face, and the conductive clamp module is used for being in threaded connection with the movable end of the vacuum switch tube; the conductive clip module comprises a first main flexible connection and a second main flexible connection, wherein one end of the first main flexible connection and one end of the second main flexible connection are fixedly connected to the conductive clip module; and the outgoing line module is used as a conductive terminal and is fixedly connected with the other end of the first main flexible connection and the other end of the second main flexible connection. The utility model discloses a move conducting block subassembly has reduced its and vacuum switch tube move the contact resistance between the end and calorific capacity, and has increased through-flow cross sectional area.

Description

Movable conducting block assembly for vacuum switch tube and circuit breaker comprising same

Technical Field

The utility model relates to a circuit breaker field, concretely relates to move conducting block subassembly and including its circuit breaker for vacuum switch tube.

Background

In medium and high voltage electrical appliances, circuit breakers are mainly used to control and protect electrical power systems. The circuit breaker comprises a vacuum switch tube, a movable conducting block assembly and an operating mechanism, wherein the movable end of the vacuum switch tube is fixedly connected to the movable conducting block assembly, and the operating mechanism is fixedly connected to the movable end of the vacuum switch tube. The working principle is as follows: when the breaker needs to be disconnected, the operating mechanism operates the moving end of the vacuum switch tube to separate the moving contact from the fixed contact in the vacuum switch tube; and when the breaker needs to be switched on, the operating mechanism operates the moving end of the vacuum switch tube to enable the moving contact to be contacted with the fixed contact.

The movable conducting block assembly in the prior art comprises a conducting clamp module, a plurality of flexible connections, an outgoing line module used as a conducting terminal and a heat dissipation device, wherein the conducting clamp module is fixedly connected or slidably connected with the movable end of a vacuum switch tube by a bolt, and the conducting clamp module is assembled with one end of the flexible connections by the bolt; the outlet module is configured to be assembled together by a plurality of removable conductive members; the other ends of the flexible connections are fixed on the outer side wall of the outgoing line module; and the heat dissipation device is provided with a notch or a cut which is matched with the other end of the soft connection.

In the prior art, the contact resistance between the conductive clamp module and the movable end of the vacuum switch tube and between the conductive clamp module and the plurality of flexible connections is unstable and has larger contact resistance, the heat productivity of a main loop of the circuit breaker is increased, and the gap between the heat dissipation device and the outgoing line module is larger and cannot be close to the outgoing line module, so that the heat dissipation area is smaller, the heat dissipation performance is poorer, and the air circulation is not facilitated.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that prior art exists, the utility model provides a move conducting block subassembly for vacuum switch tube, the external screw thread has on the end is served in moving of vacuum switch tube, it includes to move the conducting block subassembly:

the conductive clamp module is provided with a first end face and a second end face which are oppositely arranged, and a threaded through hole which penetrates through the first end face and the second end face, and the conductive clamp module is used for being in threaded connection with the movable end of the vacuum switch tube;

the conductive clip module comprises a first main flexible connection and a second main flexible connection, wherein one end of the first main flexible connection and one end of the second main flexible connection are fixedly connected to the conductive clip module; and

and the outgoing line module is used as a conductive terminal and is fixedly connected with the other end of the first main flexible connection and the other end of the second main flexible connection.

Preferably, the module of being qualified for the next round of competitions includes relative first current conducting plate and the second current conducting plate that sets up, and fixes third current conducting plate between first current conducting plate and the second current conducting plate, first current conducting plate, second current conducting plate and third current conducting plate have injectd the ventiduct that supplies circulation of air, the air is in circulation direction in the ventiduct is on a parallel with the axis of screw thread through-hole, the other end of first main flexible coupling and the other end of the main flexible coupling of second fixed connection respectively to first current conducting plate and second current conducting plate.

Preferably, the first conductive plate and the second conductive plate are flat, the first conductive plate includes a first groove portion and a first wiring portion, a first groove is defined on an outer side surface of the first groove portion, and the first wiring portion has a first wiring through hole; the second conductive plate includes a second groove portion having a second groove defined on an outer side surface thereof and a second wiring portion having a second wiring through hole.

Preferably, the third conductive plate is parallel to the axis of the threaded through hole and perpendicular to the first conductive plate and the second conductive plate, and the third conductive plate is fixedly connected to the first wiring portion and the second wiring portion.

Preferably, the outlet module is integrally formed.

Preferably, the conductive clip module has a first side surface and a second side surface which are oppositely arranged, the first main flexible connection includes a first welding portion, a first fixing portion and a flexible first bending portion located between the first welding portion and the first fixing portion, the first welding portion is parallel to the first side surface and is fixedly connected to the first side surface through full welding, and the first fixing portion is fixedly connected to the first groove portion of the first conductive plate; and the second main flexible connection comprises a second welding part, a second fixing part and a flexible second bending part which is positioned between the second welding part and the second fixing part, the second welding part is parallel to the second side surface and is fixedly connected to the second side surface through full welding, and the second fixing part is fixedly connected to the second groove part of the second conductive plate.

Preferably, the first fixing portion is adapted to a shape of a first groove defined by the first groove portion and is located in the first groove, and the second fixing portion is adapted to a shape of a second groove defined by the second groove portion and is located in the second groove.

Preferably, the first fixing portion and the second fixing portion have a first slot and a second slot, respectively, and the first slot and the second slot extend in a direction parallel to the axis of the threaded through hole.

Preferably, the conductive clip module has a third side and a fourth side which are oppositely arranged; the flexible connection includes an auxiliary flexible connection, the auxiliary flexible connection including: third welding part, third fixed part and be located between third welding part and the third fixed part and be flexible third flexion, the third welding part is on a parallel with the third side just through full weld fixed connection to the third side, third fixed part fixed connection to the third conductive plate.

Preferably, the movable conductive block assembly comprises a first heat dissipation plate and a second heat dissipation plate which are arranged oppositely, and the first heat dissipation plate and the second heat dissipation plate are wrapped or covered on the conductive clip module, the flexible connection, the first groove portion of the first conductive plate and the second groove portion of the second conductive plate.

Preferably, the first heat dissipation plate has a first inner side wall and a first outer side wall which are arranged oppositely, the first inner side wall defines a first accommodating space for accommodating a first bending portion of the first main flexible connection, the first inner side wall of the first heat dissipation plate is attached to the first main flexible connection and the first conductive plate, the second heat dissipation plate has a second inner side wall and a second outer side wall which are arranged oppositely, the second inner side wall defines a second accommodating space for accommodating a second bending portion of the second main flexible connection, and the second inner side wall of the second heat dissipation plate is attached to the second main flexible connection and the second conductive plate.

Preferably, the first inner side wall of the first heat dissipation plate is provided with a plurality of first flow deflectors, a first guide groove with an extending direction parallel to the axis of the threaded through hole is defined between two adjacent first flow deflectors, and the first outer side wall of the first heat dissipation plate is provided with a plurality of first cooling fins with an extending direction parallel to the axis of the threaded through hole; and a plurality of second guide vanes are arranged on the second inner side wall of the second heat dissipation plate, a second guide groove with the extending direction parallel to the axis of the threaded through hole is defined between every two adjacent second guide vanes, and a plurality of second heat dissipation fins with the extending direction parallel to the axis of the threaded through hole are arranged on the second outer side wall of the second heat dissipation plate.

The utility model also provides a circuit breaker, the circuit breaker includes:

the movable conducting block assembly comprises a conducting clamp module with a threaded through hole; and

the movable end of the vacuum switch tube is provided with an external thread, and the movable end of the vacuum switch tube is in threaded connection with the conductive clamp module.

The movable conductive block component of the utility model reduces the contact resistance and the heat productivity between the movable conductive block component and the movable end of the vacuum switch tube, increases the area of the through-flow section, and allows the conduction of larger main loop current; the hollow ventilation channel of the outlet module saves materials and cost, and is beneficial to cold air flowing and taking away hot air; the heat dissipation plate is attached to the wire outlet module, so that the heat conduction performance and the heat dissipation effect are improved; the outgoing line module is integrally formed, one ends of the flexible connections are welded on the conductive clamp modules, and the movable conductive block assembly has fewer detachable parts, is convenient to install and has a firmer and more reliable structure.

Drawings

Embodiments of the invention are further described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a movable conductive block assembly according to a preferred embodiment of the present invention connected to a vacuum switch tube.

Fig. 2 is a side view of the movable conducting block assembly and the vacuum interrupter tube of fig. 1 taken in the direction of arrow a.

Fig. 3 is an exploded view of the moving conductive block assembly shown in fig. 1.

Fig. 4 is a perspective view of the conductive clip module and the flexible connection of the moving conductive block assembly of fig. 3 being soldered together.

Fig. 5 is a perspective view of the conductive clip module and flexible connection shown in fig. 4, further exploded.

Fig. 6 is an enlarged perspective view of the outlet module in the movable conducting block assembly shown in fig. 3.

Fig. 7 is a side view of the line outgoing module shown in fig. 6 in the direction of arrow B.

Fig. 8 is an enlarged perspective view of the first heat dissipation plate and the second heat dissipation plate in the movable conductive block assembly shown in fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings.

Fig. 1 is a perspective view illustrating a movable conductive block assembly according to a preferred embodiment of the present invention connected to a vacuum switch tube, and fig. 2 is a side view of the movable conductive block assembly and the vacuum switch tube shown in fig. 1 along the direction of arrow a. As shown in fig. 1 and 2, the movable conductive block assembly 1 includes a conductive clip module 11, a flexible connection 12, an outgoing line module 13 serving as a conductive terminal, and a first heat dissipation plate 141 and a second heat dissipation plate 142 which are oppositely disposed, wherein the first heat dissipation plate 141 and the second heat dissipation plate 142 wrap or cover a portion of the outgoing line module 13, the conductive clip module 11, and the flexible connection 12. In which fig. 1 and 2 show the movable conducting block assembly 1 for clarity, only a portion of the vacuum interrupter 2 is shown here, and the insulating tie rod passing through the outlet module 13 and fixedly connected to the movable end of the vacuum interrupter is not shown.

Fig. 3 is an exploded view of the moving conductive block assembly shown in fig. 1. As shown in fig. 3, the movable end 21 of the vacuum interrupter 2 is cylindrical and has an external thread. The conductive clamp module 11 has a threaded through hole 117, the threaded through hole 117 is matched with the external thread on the moving end 21 of the vacuum switch tube 2, and the two are fixedly connected through threads. The flexible connection 12 includes oppositely disposed first and second primary flexible connections 121 and 122, and an optional secondary flexible connection 123 on one side of the first and second primary flexible connections 121 and 122. One end of the first main flexible connection 121, the second main flexible connection 122 and the auxiliary flexible connection 123 is connected to the conductive clip module 11, and the other end thereof is fixedly connected to the wire outlet module 13.

Fig. 4 is a perspective view of the conductive clip module 11 and the flexible connection 12 of the movable conductive block assembly shown in fig. 3. Fig. 5 is a perspective view of the conductive clip module 11 and the flexible connection 12 shown in fig. 4, further exploded. As shown in fig. 4 and 5, the conductive clip module 11 has a block shape and is made of a metal material (e.g., copper, aluminum, etc.) having good conductivity. The conductive clip module 11 has first and second oppositely disposed sides 111, 112, third and fourth oppositely disposed sides 113, 114, and first and second oppositely disposed ends 115, 116. Wherein the first side 111, the second side 112 and the third side 113 all have a step, the fourth side 114 is a plane, and the threaded through hole 117 penetrates the first end surface 115 and the second end surface 116 along the axis L.

The first main flexible connection 121 has a plate-like structure with a bent portion, and is integrally formed (for example, stamped or forged) from a metal material (for example, copper, aluminum, or the like) having good conductivity. The first main soft joint 121 includes a first welding portion 1211, a first fixing portion 1213 and a first bending portion 1212 therebetween. The first welding portion 1211 is parallel to the first side surface 111 of the conductive clip module 11 and is fixed to a step portion of the first side surface 111 by, for example, full welding (also referred to as "all-over welding"). The first curved portion 1212 has an arcuate or semi-cylindrical shape, which has flexibility and is capable of stretching and contracting in a direction parallel to the axis L. The first fixing portion 1213 has a flat plate shape, and has a fixing through hole 1214 and a slot 1215. The slot 1215 has a length direction parallel to the axis L of the threaded through hole 117 and extends to an end of the first fixing portion 1213. When the conductive clip module 11 is operated to move along the axis L of the threaded through hole 117, the conductive clip module 11 can bring the first bending portion 1212 into stretching and contracting movements.

The second main flexible connection 122 is the same as the first main flexible connection 121, and also includes a second welding portion 1221, a second fixing portion 1223 and a second bending portion 1222 therebetween, the second fixing portion 1223 also has a slot 1225 thereon, and the second welding portion 1221 is also fixed to the step portion of the second side surface 112 of the conductive clip module 11 by welding (e.g., full welding). Therefore, the second main soft connection 122 and the first main soft connection 121 can be manufactured by the same materials, devices and processes, and the manufacturing cost is saved.

The auxiliary soft joint 123 includes a third welding part 1231, a third fixing part 1233, and a third bending part 1232 therebetween. Wherein the third welding part 1231 is fixed to the stepped part of the third side surface 113 by welding (e.g., full welding), for example. The auxiliary flexible coupling 123 has substantially the same shape and structure as the first main flexible coupling 121 except that the third fixing portion 1233 of the auxiliary flexible coupling 123 does not have a slot.

Fig. 6 is an enlarged perspective view of the outlet module 13 in the movable conductive block assembly shown in fig. 3. Fig. 7 is a side view of the outlet module 13 shown in fig. 6 in the direction of arrow B. As shown in fig. 6 and 7, the outlet module 13 is substantially H-shaped, is formed by forging a metal material, and includes a first conductive plate 131 and a second conductive plate 132 that are oppositely disposed, and a third conductive plate 133 that is fixed between the first conductive plate 131 and the second conductive plate 132. Wherein the first, second and third conductive plates 131, 132, 133 are all parallel to the axis L

The first conductive plate 131 has a flat plate shape and includes a first support portion 1311, a first groove portion 1312, and a first wire connecting portion 1313. The first support 1311 has a first support through hole 1314 for allowing a bolt to pass therethrough and be fixedly coupled to a support (not shown in fig. 6) that is coupled to the mounting cabinet. A first groove 1315 is defined on an outer side surface of the first groove portion 1312, and the first groove 1315 is shaped to fit with the first fixing portion 1213 of the first primary soft coupling 121 and is adapted to receive the first fixing portion 1213. The first recessed portion 1312 also has a fixing through hole 1316, and the fixing through hole 1316 is aligned with the fixing through hole 1214 of the first fixing portion 1213. A screw or bolt passes through the fixing through-hole 1214 on the first fixing portion 1213 and the fixing through-hole 1316 on the first groove portion 1312 in this order, thereby firmly fixing the first primary soft joint 121 on the first conductive plate 131 of the outlet module 13. The first connection portion 1313 of the first conductive plate 131 has a connection through hole 1317, and the connection through hole 1317 is used for fixedly connecting with other electronic components (not shown in fig. 6) on the main circuit of the circuit breaker.

The second conductive plate 132 and the first conductive plate 131 are symmetrically disposed, the second conductive plate 132 also includes a second supporting portion 1321, a second recess portion 1322, and a second wire connecting portion 1323, and the second recess portion 1322 has a second recess 1325 defined on an outer side surface thereof for receiving the second fixing portion 1223 of the second main flexible connector 122.

The third conductive plate 133 is perpendicular to the first and second conductive plates 131 and 132, and is fixedly connected to the first wire connection portion 1313 of the first conductive plate 131 and the second wire connection portion 1323 of the second conductive plate 132. The third conductive plate 133, the first groove portions 1312 of the first conductive plate 131, and the second groove portions 1322 of the second conductive plate 132 thus define a hollow air passage 134 extending along the axis L of the threaded through hole 117, and air can circulate in the hollow air passage 134.

Fig. 8 is an enlarged perspective view of the first heat dissipation plate 141 and the second heat dissipation plate 142 in the movable conductive block assembly shown in fig. 3. As shown in fig. 8, the first heat dissipation plate 141 and the second heat dissipation plate 142 are made of a material having good insulating properties and heat dissipation properties, and may be subjected to a vulcanization process to further increase their insulating properties. The first heat dissipation plate 141 and the second heat dissipation plate 142 are disposed symmetrically with respect to each other.

The first heat dissipation plate 141 has a first inner sidewall 1411 and a first outer sidewall 1412, which are oppositely disposed, and the first inner sidewall 1411 defines a first receiving space (not shown in fig. 8) for receiving the first bent portion 1212 of the first main flexible connector 121, so that the first inner sidewall 1411 can fit the first main flexible connector 121 and the first conductive plate 131. The first inner sidewall 1411 further has a plurality of first baffles 1414, wherein a first guide groove (not shown in fig. 8) for guiding air circulation is defined between two adjacent first baffles 1414, and the extending direction of the first guide groove is parallel to the axis L of the threaded through hole 117. The first outer sidewall 1412 has a plurality of first cooling fins 1416 arranged in parallel, and the extending direction of the first cooling fins 1416 is parallel to the axis L of the threaded through hole 117.

The second heat dissipation plate 142 also has a second inner sidewall 1421 and a second outer sidewall 1422 disposed oppositely, and the second inner sidewall 1421 defines a second accommodating space 1423 for accommodating the second curved portion 1222 of the second main flexible connector 122. The second inner side wall 1421 of the second heat dissipation plate 142 can be bonded to the second main flexible connector 122 and the second conductive plate 132. The second inner sidewall 1421 further has a plurality of second guide vanes 1424, wherein a second guide groove 1425 for guiding air flow is defined between two adjacent second guide vanes 1424, and the extending direction of the second guide groove 1425 is parallel to the axis L of the threaded through hole 117. The second outer sidewall 1422 has a plurality of second fins (not shown in fig. 8) arranged in parallel, and the extending direction of the second fins is parallel to the axis L of the threaded through hole 117.

The working principle and the advantages of the circuit breaker of the present invention are briefly described below with reference to fig. 1 to 3. When the current of the main circuit of the circuit breaker is too large, the insulating pull rod (not shown in the figure) pulls the moving end 21 of the vacuum switch tube 2 along the axis L, so that the moving contact and the static contact (not shown in the figure) inside the housing of the vacuum switch tube 2 are separated, the moving end 21 of the vacuum switch tube 2 simultaneously drives the conductive clip module 11 to move along the axis L, and drives the first bending portion 1212, the second bending portion 1222 and the third bending portion 1232 to contract. When the circuit breaker needs to be switched on, the insulating pull rod pushes the moving end 21 of the vacuum switch tube 2 along the axis L, so that the moving contact and the static contact inside the vacuum switch tube 2 shell are contacted, the moving end 21 of the vacuum switch tube 2 simultaneously drives the conductive clamp module 11 to move along the axis L, and drives the first bending portion 1212, the second bending portion 1222 and the third bending portion 1232 to stretch.

When the circuit breaker is turned on, the conductive clip module 11, the flexible connection 12, and the outlet module 13 generate heat to heat surrounding air, and the hot air moves upward, i.e., in a direction toward the vacuum switching tube 2, so that negative pressure is formed inside the first and second heat dissipation plates 141 and 142. The cool air under the first and second heat dissipation plates 141 and 142 moves in the direction indicated by the arrow C shown in fig. 2, wherein a portion of the cool air moves upward along the guide grooves formed by the first guide vanes 1414 on the first inner side wall 1411 of the first heat dissipation plate 141 and the guide grooves 1425 formed by the second guide vanes 1424 on the second inner side wall 1421 of the second heat dissipation plate 142, and another portion of the cool air moves upward along the hollow air duct 134, thereby rapidly blowing the hot air to improve the heat dissipation performance, and simultaneously avoiding the formation of turbulence.

The movable end 21 of the vacuum switch tube 2 is connected with the conductive clamp module 11 in a threaded fit manner, the threaded connection has a large contact area, and the conductive area and the current capacity are increased; meanwhile, the movable end 21 of the vacuum switch tube 2 and the conductive clamp module 11 are stably contacted through the threaded connection, and the contact resistance is kept unchanged.

The flexible connection 12 is fixed to the conductive clip module 11 by full-on welding so that the maximum mechanical connection strength and the minimum contact resistance are provided therebetween.

The outgoing line module 13 is integrally formed through a forging process, and has high mechanical strength and good conductivity. The outlet module 13 defines a hollow air duct 134, which saves materials and reduces costs, and simultaneously allows air to smoothly circulate in the air duct 134, thereby taking away hot air to increase heat dissipation performance.

The outgoing line module 13 is integrally formed, and one end of the flexible connection 12 is welded on the conductive clamp module 11, so that the movable conductive block assembly 1 has fewer detachable parts, is convenient to install and has a firmer and more reliable structure.

The first fixing portion 1213 of the first main flexible connection 121 and the second fixing portion 1223 of the second main flexible connection 122 are respectively located in the first groove 1315 and the second groove 1325 of the wire outgoing module 13, the first inner sidewall 1411 of the first heat dissipation plate 141 can be attached to the first conductive plate 131 and the first main flexible connection 121, and the second inner sidewall 1421 of the second heat dissipation plate 142 can be attached to the second conductive plate 132 and the second main flexible connection 122, so that the heat dissipation area and the heat conduction are increased, and the heat dissipation effect is improved.

The slots 1215 on the first main flexible coupling 121 and the slots 1225 on the second main flexible coupling 122 can improve the amount of mechanical expansion and contraction of the flexible couplings 12 during the stretching and contracting movements, and prevent the first main flexible coupling 121 and the second main flexible coupling 122 from falling off or loosening from the line outgoing module 13. In addition, the slots 1215 and 1225 can improve the distribution of the surrounding electric field, so that the distribution of the electric field around the first main soft connection 121 and the second main soft connection 122 is more uniform, and the electric discharge phenomenon caused by the concentration of the electric field is avoided.

The first and second heat dissipation plates 141 and 142 wrap the conductive clip module 11, the flexible connections 12, and the outlet module 13 except for the first and second wire connection portions 1313 and 1323. On one hand, the movable conducting block assembly 1 has reliable insulating performance, and on the other hand, the movable conducting block assembly occupies a substantially rectangular space, so that the movable conducting block assembly is concise and attractive.

In another embodiment of the present invention, depending on the magnitude of the current capacity, the auxiliary flexible connection may not be provided, for example, when the current of the main circuit of the circuit breaker is small.

In another embodiment of the invention, the secondary flexible connection has a slot extending parallel to the axis L.

In another embodiment of the present invention, the side of the conductive clip module does not have a step portion, i.e., the first side, the second side, and the third side thereof are flat surfaces, so that the conductive clip module and the flexible connection are firmly welded together.

The utility model also provides a circuit breaker, it includes that the aforesaid moves conducting block subassembly 1, vacuum switch tube 2 and insulating pull rod, and vacuum switch tube 2 move end 21 and have the external screw thread, and pass through threaded connection with the electrically conductive clamp module 11 that moves among the conducting block subassembly 1, and insulating pull rod and vacuum switch tube 2 move end 21 and pass through threaded connection.

Although the present invention has been described in connection with the preferred embodiments, it is not intended to limit the invention to the embodiments described herein, but rather, to include various changes and modifications without departing from the scope of the invention.

Claims (13)

1. A move conducting block subassembly for vacuum switch tube, the vacuum switch tube moves and has the external screw thread on holding, its characterized in that moves the conducting block subassembly and includes:

the conductive clamp module is provided with a first end face and a second end face which are oppositely arranged, and a threaded through hole which penetrates through the first end face and the second end face, and the conductive clamp module is used for being in threaded connection with the movable end of the vacuum switch tube;

the conductive clip module comprises a first main flexible connection and a second main flexible connection, wherein one end of the first main flexible connection and one end of the second main flexible connection are fixedly connected to the conductive clip module; and

and the outgoing line module is used as a conductive terminal and is fixedly connected with the other end of the first main flexible connection and the other end of the second main flexible connection.

2. The movable conducting block assembly according to claim 1, wherein the outlet module comprises a first conducting plate and a second conducting plate which are arranged oppositely, and a third conducting plate fixed between the first conducting plate and the second conducting plate, the first conducting plate, the second conducting plate and the third conducting plate define a ventilation channel for air to circulate, the circulation direction of the air in the ventilation channel is parallel to the axis of the threaded through hole, and the other end of the first main flexible connection and the other end of the second main flexible connection are respectively and fixedly connected to the first conducting plate and the second conducting plate.

3. The movable conductive block assembly according to claim 2, wherein the first conductive plate and the second conductive plate are flat plate-shaped, the first conductive plate includes a first groove portion and a first wiring portion, a first groove is defined on an outer side surface of the first groove portion, and the first wiring portion has a first wiring through hole; the second conductive plate includes a second groove portion having a second groove defined on an outer side surface thereof and a second wiring portion having a second wiring through hole.

4. The movable conductive block assembly according to claim 3, wherein the third conductive plate is parallel to an axis of the threaded through hole and perpendicular to the first and second conductive plates, the third conductive plate being fixedly connected with the first and second wire connection portions.

5. The movable conductive block assembly of claim 2, wherein the outlet modules are integrally formed.

6. The movable conductive block assembly of claim 3, wherein the conductive clip module has first and second oppositely disposed sides,

the first main flexible connection comprises a first welding part, a first fixing part and a flexible first bending part, wherein the first bending part is positioned between the first welding part and the first fixing part, the first welding part is parallel to the first side surface and is fixedly connected to the first side surface through full welding, and the first fixing part is fixedly connected to a first groove part of the first conductive plate; and

the second main flexible connection comprises a second welding part, a second fixing part and a flexible second bending part, the second welding part is located between the second welding part and the second fixing part and is parallel to the second side face and is fixedly connected to the second side face through full welding, and the second fixing part is fixedly connected to a second groove part of the second conductive plate.

7. The movable conductive block assembly of claim 6, wherein the first securing portion is shaped to fit within a first recess defined by the first recessed portion and the second securing portion is shaped to fit within a second recess defined by the second recessed portion and the second recess.

8. The movable conductive block assembly according to claim 6, wherein the first and second fixing portions have first and second slots, respectively, extending in a direction parallel to an axis of the threaded through hole.

9. The movable conductive block assembly of claim 6, wherein the conductive clip module has oppositely disposed third and fourth sides; the flexible connection includes an auxiliary flexible connection, the auxiliary flexible connection including: third welding part, third fixed part and be located between third welding part and the third fixed part and be flexible third flexion, the third welding part is on a parallel with the third side just through full weld fixed connection to the third side, third fixed part fixed connection to the third conductive plate.

10. The moving conductive block assembly of any one of claims 6-9, wherein the moving conductive block assembly comprises first and second heat sink plates disposed opposite one another, the first and second heat sink plates wrapping or covering the conductive clip module, the flexible connection, the first recessed portion of the first conductive plate, and the second recessed portion of the second conductive plate.

11. The movable conductive block assembly of claim 10, wherein the first heat sink has a first inner sidewall and a first outer sidewall that are opposite, the first inner sidewall defining a first receiving space for receiving a first bend of the first main flexible connection, and the first inner sidewall of the first heat sink conforms to the first main flexible connection and the first conductive plate, the second heat sink has a second inner sidewall and a second outer sidewall that are opposite, the second inner sidewall defining a second receiving space for receiving a second bend of the second main flexible connection, and the second inner sidewall of the second heat sink conforms to the second main flexible connection and the second conductive plate.

12. The movable conductive block assembly of claim 11,

the first inner side wall of the first heat dissipation plate is provided with a plurality of first flow deflectors, a first guide groove with the extending direction parallel to the axis of the threaded through hole is defined between every two adjacent first flow deflectors, and the first outer side wall of the first heat dissipation plate is provided with a plurality of first cooling fins with the extending direction parallel to the axis of the threaded through hole; and

the second inner side wall of the second heat dissipation plate is provided with a plurality of second flow deflectors, a second guide groove with the extending direction parallel to the axis of the threaded through hole is defined between every two adjacent second flow deflectors, and the second outer side wall of the second heat dissipation plate is provided with a plurality of second cooling fins with the extending direction parallel to the axis of the threaded through hole.

13. A circuit breaker, characterized in that the circuit breaker comprises:

a moving conductive block assembly as claimed in any one of claims 1 to 12 including a conductive clip module having a threaded through bore; and

the movable end of the vacuum switch tube is provided with an external thread, and the movable end of the vacuum switch tube is in threaded connection with the conductive clamp module.

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