阅读说明：本技术 一种弹簧组保持的快速斥力操动机构 (Quick repulsion operating mechanism maintained by spring group ) 是由 刘晓明 李建兵 李培源 姜文涛 陈海 于 2020-07-02 设计创作，主要内容包括：本发明公开了一种弹簧组保持的快速斥力操动机构,属于断路器快速操动机构领域。该操动机构包括弹簧组保持缓冲单元、绝缘拉杆、电磁斥力推动单元。其中,绝缘拉杆在电磁斥力推动单元驱动下快速上下运动,绝缘拉杆向上或向下运动到一定位移时,弹簧组保持缓冲单元对所述绝缘拉杆的上、下固定位置状态施加保持力,电磁斥力推动单元与弹簧组保持缓冲单元通过绝缘拉杆连接。本发明可实现断路器快速分断和闭合,能在几毫秒内完成分断与闭合过程。同时独特的弹簧缓冲保持结构可提供足够的分合闸保持力和缓冲反力,保证了断路器操动机构的高可靠性。(The invention discloses a quick repulsion force operating mechanism kept by a spring set, and belongs to the field of quick operating mechanisms of circuit breakers. The operating mechanism comprises a spring group maintaining and buffering unit, an insulating pull rod and an electromagnetic repulsion pushing unit. The insulating pull rod moves up and down rapidly under the driving of the electromagnetic repulsion pushing unit, when the insulating pull rod moves up or down to a certain displacement, the spring group keeps the buffer unit to apply a holding force to the upper and lower fixed position states of the insulating pull rod, and the electromagnetic repulsion pushing unit is connected with the spring group keeping buffer unit through the insulating pull rod. The invention can realize the quick breaking and closing of the breaker and can complete the breaking and closing process within a few milliseconds. Meanwhile, the unique spring buffering and retaining structure can provide enough opening and closing retaining force and buffering counter force, and the high reliability of the circuit breaker operating mechanism is guaranteed.)

1. A quick repulsion mechanism kept by a spring group is characterized by comprising a spring group keeping buffer unit, an insulating pull rod and an electromagnetic repulsion pushing unit; the insulating pull rod moves up and down rapidly under the driving of the electromagnetic repulsion pushing unit; when the insulating pull rod moves upwards or downwards to a certain displacement, the spring group keeps the buffer unit to apply a holding force to the upper and lower fixed position states of the insulating pull rod; the electromagnetic repulsion force pushing unit is connected with the spring group maintaining and buffering unit through the insulating pull rod.

2. The mechanism of claim 1, wherein the electromagnetic repulsion pushing unit comprises an opening coil panel, a metal repulsion coil panel, a support member, a fastening member and a closing coil panel; the opening coil panel is connected with the closing coil panel through the supporting piece, and a first distance is reserved between the opening coil panel and the closing coil panel; the metal repulsion plate is fixed on the insulating pull rod through the fastener; the opening coil panel, the closing coil panel and the metal repulsion panel are coaxial.

3. A spring pack retention quick repulsion mechanism according to claim 1, characterized in that said spring pack retention cushion unit includes a spring pack retention cushion assembly, a spring pack retention cushion assembly housing; the spring pack retention bumper assembly comprises one or more springs and a spring hanging shaft; one or more of the springs are strung on the spring hanging shaft; one end of the spring hanging shaft rod is connected with the metal beam of the spring group maintaining buffer assembly shell; the metal beam of the spring group maintaining buffer assembly shell is vertically fixed with the spring group maintaining buffer assembly shell; the other end of the spring hanging shaft rod is connected with the metal beam of the insulating pull rod; and the metal beam of the insulating pull rod is vertically fixed with the insulating pull rod.

4. The mechanism of claim 2, wherein the opening coil disc is of a square structure and the closing coil disc is of a square structure; the shell of the opening coil panel is made of an insulating material; the shell of the switching-on coil disc is made of an insulating material; at least one square conductive coil is arranged in the opening coil panel; at least one square conductive coil is arranged in the closing coil panel; insulating glue is filled between every two circles of the conductive coils; the lead of the opening coil panel is connected with an external circuit through the wire outlet groove of the opening coil panel; and the lead of the closing coil panel is connected with an external circuit through the wire outlet groove of the closing coil panel.

5. A spring pack retention quick repulsion mechanism according to claim 3, characterized in that said spring pack retention cushion assembly is one or more in number.

6. A spring pack retention quick repulsion mechanism according to claim 3, wherein said spring pack retention cushion assembly housing is formed of a metallic material, said spring pack retention cushion assembly housing having at least one pair of corresponding spring pack openings and one pair of corresponding dielectric pull rod openings on opposite sides thereof, said spring pack retention cushion assembly housing metal beam passing through said spring pack openings; and the metal cross beam of the insulating pull rod penetrates through the opening of the insulating pull rod.

Technical Field

The invention relates to the technical field of operating mechanisms, in particular to a quick repulsion operating mechanism maintained by a spring set.

Background

In recent years, with the large-scale access of distributed power supplies and energy storage devices, the rapid development of power electronic technology, and the increase of direct current loads, direct current power distribution has received more and more attention. Particularly, direct current systems such as large ship power supply systems, photovoltaic direct current micro-grid systems, urban rail transit power supply systems and the like are developed greatly in certain specific occasions. With the continuous increase of the capacity and the continuous improvement of the voltage grade of a direct current system, when a grid-side large-current parallel short circuit fault occurs in the system, the system is easily burnt due to overhigh current due to long inherent brake-separating time, and the fault needs to be quickly cut off and isolated within a few ms. This places extremely high demands on the actuator of the mechanical switch. The traditional operating mechanism is difficult to meet the speed requirement, and the research on a novel operating mechanism with ultra-fast action capability becomes the current research hotspot. The electromagnetic repulsion mechanism based on the eddy current principle well matches the speed requirement of the direct current circuit breaker, and has a good application prospect in the field of rapid mechanical switches. The voltage grade of the previously developed fast switch is generally 10-35kV, the switch has long stroke and no outstanding buffer problem, and the normal operation of the fast switch is not influenced even if no buffer is applied. For a small-stroke and large-breaking-capacity quick mechanical switch, if no buffer is applied, the moving part reaches the end position and can generate strong mechanical impact to rebound to the initial position, so that the opening and closing operation fails. The buffering problem has become one of the bottleneck problems in developing a fast mechanical switch with small stroke and large breaking capacity.

For example, chinese patent with application number CN201620362749.5 discloses a fast switch based on permanent magnet holding mechanism, which comprises a repulsion mechanism and a permanent magnet mechanism, and comprises an upper guide rod, a vacuum arc-extinguishing chamber, a middle guide rod, an insulator, a lower guide rod and a movable iron core for holding, which are connected in sequence, and is characterized in that: a repulsion coil is sleeved on the lower guide rod, an opening coil panel is arranged above the repulsion coil, and a closing coil panel is arranged below the repulsion coil panel; an upper holding stationary core is attached to the upper holding movable core, a closing holding permanent magnet is attached to the middle of the upper holding stationary core, a lower holding stationary core is attached to the lower holding movable core, and a switching-off holding permanent magnet is attached to the middle of the lower holding stationary core. The lower end of the closing keeping permanent magnet is shorter than the lower end of the upper keeping static iron core, so that a groove is formed at the lower end of the upper keeping static iron core and serves as an upper air gap; wherein the upper end of the opening keeping permanent magnet is shorter than the upper end of the lower keeping static iron core, so that a groove is formed at the upper end of the lower keeping static iron core to be used as a lower air gap. The permanent magnet holding part is used for providing switching-off holding force and switching-on holding force for an arc extinguish chamber contact in the circuit breaker, so that the circuit breaker is in a stable switching-off state or a stable switching-on state; the electromagnetic repulsion operating part provides electromagnetic force in the opening and closing operation process, so that the breaker is changed from opening to closing or from closing to opening.

But above-mentioned fast switch uses the permanent magnet of structure from top to bottom to provide the holding power, and this structure has the potential safety hazard because can produce very big impact force at the iron core fast motion in-process, leads to the permanent magnet breakage very easily, and the fast motion of mechanism can produce very big spring in addition, is unfavorable for circuit breaker non-maintaining nature and reliability. In addition, the opening and closing holding force of the mechanism is provided by the attractive force between the permanent magnet and the metal shell, the structure is complex, and the industrialization is not facilitated.

Disclosure of Invention

The embodiment of the invention provides a quick repulsion mechanism maintained by a spring group, which can realize quick breaking and quick closing of a circuit breaker and can complete the breaking and closing processes within a few milliseconds. Meanwhile, the unique spring group buffering and retaining structure can provide enough opening and closing retaining force and buffering counter force, and the high reliability of the circuit breaker operating mechanism is guaranteed.

Technical scheme

In a first aspect, an embodiment of the present invention provides a quick repulsion mechanism held by a spring set, including a spring set holding buffer unit, an insulating pull rod, and an electromagnetic repulsion pushing unit;

the insulating pull rod moves up and down rapidly under the driving of an electromagnetic repulsion pushing unit; when the insulating pull rod moves upwards or downwards to a certain displacement, the spring group keeps the buffer unit to apply a holding force to the upper and lower fixed position states of the insulating pull rod; the electromagnetic repulsion force pushing unit is connected with the spring group maintaining and buffering unit through the insulating pull rod.

Further, the electromagnetic repulsion pushing unit comprises a switching-off coil panel, a metal repulsion coil panel, a support member, a fastening member and a switching-on coil panel;

the opening coil panel and the closing coil panel are connected through the supporting piece, and a first distance is reserved between the opening coil panel and the closing coil panel; the metal repulsion plate is fixed on the insulating pull rod through the fastener; the opening coil panel, the closing coil panel and the metal repulsion panel are coaxial.

Further, the spring group holding buffer unit comprises a spring group holding buffer assembly and a spring group holding buffer assembly shell;

wherein the spring pack retention bumper assembly comprises one or more springs and a spring hanging shaft; one or more of the springs are strung on the spring hanging shaft; one end of the spring hanging shaft rod is connected with the metal beam of the spring group maintaining buffer assembly shell; the metal beam of the spring group maintaining buffer assembly shell is vertically fixed with the spring group maintaining buffer assembly shell; the other end of the spring hanging shaft rod is connected with the metal beam of the insulating pull rod; and the metal beam of the insulating pull rod is vertically fixed with the insulating pull rod.

Further, the opening coil panel is of a square structure, and the closing coil panel is of a square structure; the shell of the opening coil panel is made of an insulating material; the shell of the switching-on coil disc is made of an insulating material; at least one square conductive coil is arranged in the opening coil panel; at least one square conductive coil is arranged in the closing coil panel; insulating glue is filled between every two circles of the conductive coils; the lead of the opening coil panel is connected with an external circuit through the wire outlet groove of the opening coil panel; and the lead of the closing coil panel is connected with an external circuit through the wire outlet groove of the closing coil panel.

Further, the number of the spring group holding buffer assemblies is one or more.

Further, the spring group holding buffer assembly shell is made of metal materials, at least one pair of corresponding spring group openings and one corresponding insulating pull rod opening are formed in two opposite side faces of the spring group holding buffer assembly shell, and a metal cross beam of the spring group holding buffer assembly shell penetrates through the spring group openings; and the metal cross beam of the insulating pull rod penetrates through the opening of the insulating pull rod.

In the embodiment of the invention, the spring group keeps the effective combination of the buffer unit, the insulating pull rod and the electromagnetic repulsion pushing unit, so that the opening and closing speed of the switch can be improved, the arcing time can be shortened, the ablation of a contact can be reduced, and the opening and closing capacity of the circuit breaker can be improved. In addition, the spring group holding buffer unit can generate enough opening and closing holding force and buffer force through the spring group, so that the reliability of the operating mechanism can be ensured, and the key step of realizing the maintenance-free circuit breaker is realized.

Drawings

Fig. 1 is a schematic structural diagram of a quick repulsive force mechanism retained by a spring set according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a quick repulsive force mechanism retained by a spring set according to an embodiment of the present invention;

the specific implementation mode is as follows:

the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a quick repulsive force mechanism for holding a spring set according to a first embodiment of the present invention, and as shown in fig. 1, the quick repulsive force mechanism for holding a spring set includes an insulating pull rod 100, an electromagnetic repulsive force pushing unit 200, and a spring set holding buffer unit 300; wherein, a round hole is arranged between the electromagnetic repulsion force pushing unit 200 and the spring group maintaining buffer unit 300, and the two are connected through an insulating pull rod 100; the positions of the electromagnetic repulsion pushing unit 200 and the spring group maintaining buffer unit 300 are arranged up and down, preferably, the electromagnetic repulsion pushing unit 200 is arranged above, the spring group maintaining buffer unit 300 is arranged below, and the relative positions of the two are not limited in the application; the insulating pull rod 100 moves up and down rapidly under the driving of the electromagnetic repulsion force pushing unit 200; when the insulation rod 100 moves up or down to a certain displacement, the spring assembly holding buffer unit 300 applies a holding force to the upper and lower fixed position states of the insulation rod 100.

The advantage of this scheme is that the whole quality of operating mechanism is lighter, and the spring assembly keeps buffer unit can provide sufficient holding power in circuit breaker divide-shut brake position, can not make the contact separation owing to receive vibration or short-circuit current electric power effect, and the ablation of contact when having avoided the circuit breaker to endure short-circuit current.

Further, fig. 2 is a schematic diagram of a specific structure of a quick repulsive force mechanism held by a spring set in an embodiment of the present invention, and as shown in fig. 2, the electromagnetic repulsive force pushing unit 200 includes an opening coil panel 201, a metal repulsive force panel 202, a closing coil panel 203, a support 204, and a fastening member 205; the opening coil panel 201 is connected with the closing coil panel 203 through a support 204; the opening coil disc 201 and the closing coil disc 203 are separated by a first distance, the first distance needs to be determined according to the opening distance requirement of an arc extinguish chamber of the circuit breaker, for example, the circuit breaker is 10kV, the distance is 19mm, and the size of the first distance is not limited in the application; the metal repulsion disc 202 is fixed on the insulating pull rod 100 through a fastening piece 205, the fastening piece 205 is a metal nut, the material and the shape of the fastening piece are not limited in the application, as long as the metal repulsion disc 202 can be fixed on the insulating pull rod 100; the opening coil panel 201, the closing coil panel 203 and the metal repulsion panel 202 are coaxial, wherein the metal repulsion panel is made of a metal material with low density and high conductivity, such as aluminum alloy, the material and the shape of the metal repulsion panel are not limited, and the friction force can be reduced by coaxially arranging the opening coil panel, the closing coil panel and the metal repulsion panel to ensure that the circuit breaker is stressed uniformly in the movement process; when the breaker is opened, the opening coil disc 201 is electrified, an eddy current effect is generated between the opening coil disc 201 and the metal repulsion disc 202, a downward repulsion force is generated between the opening coil disc 201 and the metal repulsion disc 202, the insulating pull rod 100 and the metal repulsion disc 202 are subjected to a downward acting force, and the insulating pull rod drives the repulsion disc to move downward until the opening position of the breaker is reached, so that the breaker is ensured to be successfully opened; when the breaker is switched on, the switching coil disc 203 is electrified, an eddy current effect is generated between the switching coil disc 203 and the metal repulsion disc 202, an upward repulsion force is generated between the switching coil disc 203 and the metal repulsion disc 202, the insulating pull rod 100 and the metal repulsion disc 202 are subjected to an upward acting force, and the insulating pull rod drives the repulsion disc to move upwards until the switching-on position of the breaker is reached, so that the breaker is ensured to be switched on successfully.

Further, with continued reference to fig. 2, the spring set holding cushion unit 300 includes a spring set holding cushion assembly 301, a spring set holding cushion assembly housing 302; the spring group holding and buffering assembly 301 comprises one or more springs 311 and a spring hanging shaft rod 312, wherein the one or more springs 311 are connected in series on the spring hanging shaft rod 312, the springs 311 can provide an up-down position holding force effect, for example, the springs can be common springs, preferably disc springs, the type of the springs is not limited, the number of the springs can be determined according to the opening and closing holding force of the circuit breaker in practical application, and the number of the springs is not limited; one end of the spring hanging shaft rod 312 is connected with the metal beam 313 of the spring group holding buffer assembly shell 302, and the metal beam 313 of the spring group holding buffer assembly shell is vertically fixed with the spring group holding buffer assembly shell 302; the other end of the spring hanging shaft rod 312 is connected with the metal beam 101 of the insulating pull rod 100; a metal cross beam 101 of the insulating pull rod is vertically fixed with the insulating pull rod 100; the spring group holding buffer assembly shell 302 is made of metal materials, wherein at least one pair of corresponding spring group openings and one corresponding opening of the metal cross beam 101 of the insulating pull rod 100 are formed in two opposite side surfaces of the spring group holding buffer assembly shell 302; the metal cross beam 313 of the spring pack retention cushion assembly housing 302 passes through the spring pack aperture; the metal beam 101 of the insulated trolley 100 passes through the insulated trolley metal beam opening.

When the circuit breaker connected with the mechanism executes the opening operation, at the moment, the metal repulsion coil 202 and the opening coil 201 are close together, the spring group keeps the buffer component 301 in an upward triangular state, upward holding force is provided to close the contact of the circuit breaker, an eddy current effect is generated between the opening coil 201 and the metal repulsion coil 202 by electrifying the opening coil 201, a downward repulsion force is generated between the metal repulsion coil and the opening coil, when the downward repulsion force applied to the insulating pull rod 100 and the metal repulsion coil 202 is greater than the upward force applied to the spring group keeping buffer component 301, the insulating pull rod 100 and the metal repulsion coil 202 move downwards to drive the moving contact of the circuit breaker to move downwards, when the force applied to the spring group keeping buffer component 301 moves to a second distance, the insulating pull rod 100 and the metal repulsion coil 202 continue to move downwards until the opening position of the circuit breaker is reached to stop moving, at the moment, the spring group keeping buffer component 301 is in a downward triangular state, the downward force is applied to the insulating pull rod 100 and the metal repulsion plate 202 to keep the insulating pull rod 100 and the metal repulsion plate 202 at the opening position, so as to realize the opening operation of the circuit breaker, wherein the second distance can be 3-20mm, preferably 5-15mm, and more preferably 7 mm.

When a circuit breaker connected with the mechanism performs closing operation, at the moment, the metal repulsion coil 202 and the closing coil 203 are close together, the spring group keeps the buffer assembly 301 in a downward triangular state, downward holding force is provided to disconnect the contact of the circuit breaker, an eddy current effect is generated between the closing coil 203 and the metal repulsion coil 202 by electrifying the closing coil 203, upward repulsion is generated between the two, when the upward repulsion is applied to the insulating pull rod 100 and the metal repulsion coil 202 and is greater than the downward force of the spring group keeping buffer assembly 301, the insulating pull rod 100 and the metal repulsion coil 202 move upwards to drive the moving contact of the circuit breaker to move upwards, when the force direction of the spring group keeping buffer assembly 301 is changed to be upwards when the insulating pull rod 100 and the metal repulsion coil 202 move upwards continuously until the closing position of the circuit breaker is reached and the movement is stopped, at the moment, the spring group keeping buffer assembly 301 is in an upward triangular state, the upward force is applied to the insulating pull rod 100 and the metal repulsion plate 202 to keep the insulating pull rod at the closing position, and the closing operation of the circuit breaker is realized, wherein the third distance can be 3-20mm, preferably 5-15mm, and more preferably 7 mm.

Further, as shown in fig. 2, the opening coil panel 201 is of a square structure, the closing coil panel 203 is of a square structure, and the coil panel is square and is easily fixed to the spring assembly holding buffer unit 300; the shell of the opening coil panel 201 is made of an insulating material, the shell of the closing coil panel 203 is made of an insulating material, the insulating material is preferably epoxy resin, and the type of the insulating material is not limited in the application; at least one square conductive coil is placed in the opening coil disc 201, the preferable material of the conductive coil is a copper flat wire, at least one square conductive coil is placed in the closing coil disc 203, the preferable material of the conductive coil is a copper flat wire, and the type of the conductive coil is not limited in the application; wherein, the insulating cement is filled between every two circles of the wire coils, the insulating cement plays a role in insulating between adjacent wires, preferably yellow wax, and the application does not limit the type of the insulating cement; the outer ring lead of the opening coil panel 201 is connected with an external circuit through the wire outlet groove of the opening coil panel 201; an outer ring lead of the switching-on coil disc 203 is connected with an external circuit through an outlet groove of the switching-on coil disc 203; when the breaker is opened, the opening coil disc 201 is electrified through an external circuit; when the circuit breaker is closed, the closing coil disc 203 is energized through an external circuit.

Further, as shown in fig. 2, the number of the spring group holding buffer assemblies 301 is one or more, the specific number is determined according to the contact pressure required to be provided by the circuit breaker, for example, when the number of the spring group holding buffer assemblies 301 is multiple, the spring group holding buffer assemblies 301 are symmetrically distributed, and the number and the distribution mode of the spring group holding buffer assemblies 301 are not limited in the present application.

In the embodiment of the invention, the spring group keeps the effective combination of the buffer unit, the insulating pull rod and the electromagnetic repulsion pushing unit, so that the opening and closing speed of the switch can be improved, the arcing time can be shortened, the ablation of a contact can be reduced, and the opening and closing capacity of the circuit breaker can be improved. In addition, the spring group holding buffer unit can generate enough opening and closing holding force and buffer force through the spring group, so that the reliability of the operating mechanism can be ensured, and the key step of realizing the maintenance-free circuit breaker is realized.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.