Modular opening and closing heat transfer type anti-loose coil device

Abstract

The utility model relates to a module formula opening and closing heat transfer type anti-loose coil device belongs to the opening and closing field, including device body, the left and right inner wall of device body all are fixedly connected with insulating plate, install the iron core between two insulating plates, can play the function of the resistance and limit to coil through the resistance heat conduction mechanism, effectively suppress the coil to loosen, and can when the coil loosens, multiple one-way mixed heat pipe can play the same extrusion pressure to the coil surface, effectively avoid the situation that the loosening range expands because of uneven local stress, the resistance heat conduction mechanism can also in the coil temperature abnormal rise process, the water flow exchange can be automatically completed in one-way mixed heat pipe, thereby can reach the heat generated to coil to the outward transfer and absorption in time, thereby effectively suppress the influence range of the heat generated because of the coil in the abnormal temperature rise process, effectively reduce the security risk.

Description

Technical Field

[0001] This utility model relates to a circuit breaker coil device, and more particularly to a modular circuit breaker thermal transfer anti-loosening coil device. Background Technology

[0002] The opening and closing coils of a vacuum circuit breaker are crucial components in the opening and closing circuits, and are closely related to the reliable operation of the circuit breaker. When a power system accident occurs, if a high-voltage vacuum circuit breaker fails to operate due to a fault in the opening circuit, it will cause cascading tripping, severely escalating the accident and leading to widespread power outages. Conversely, if a fault in the closing circuit prevents the circuit breaker from reliably closing, power supply to the line cannot be restored, seriously affecting power supply reliability. The DC resistance of the opening and closing coils is the most important electrical parameter of this component, determining the performance of the opening and closing trip units. Therefore, the acceptance test standards for vacuum circuit breakers require accurate measurement of the DC resistance of the opening and closing coils; only with appropriate DC resistance can the normal and reliable operation of the circuit breaker be guaranteed.

[0003] The opening and closing coil, also known as the opening and closing electromagnet, is a control element in the control circuit. The opening and closing action of the power circuit breaker is achieved by the opening and closing coil being briefly energized to attract the electromagnet. After the opening and closing action begins, the circuit is in a self-holding state. After the action is completed, the circuit is disconnected by an auxiliary switch linked to the mechanism.

[0004] After prolonged use, the opening and closing coils may become loose, causing the electromagnet to shift when the circuit breaker opens. This can lead to the iron core jamming, resulting in coil burnout. Furthermore, a loose coil can shorten the iron core travel, preventing the tripping mechanism from opening as planned after power is applied. This results in the coil being energized for an extended period. However, all opening and closing coils are designed for short-term energization; prolonged energization will inevitably lead to burnout. When burnout occurs, the temperature rises abnormally, affecting not only the normal operation of the circuit but also creating significant safety hazards. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by providing a modular hot-transfer anti-loosening coil device for opening and closing circuits.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a modular opening and closing heat transfer anti-loosening coil device, comprising a device body, with insulating plates fixedly connected to the left and right inner walls of the device body, an iron core installed between the two insulating plates, a coil wound around the outer end of the iron core, two terminals installed at the upper end of the insulating plate on the right side, a connecting rod installed at the right end of the device body, a compression spring sleeved on the outer end of the connecting rod, an epoxy resin ring cast in the gap between the outer end of the coil and the inner wall of the device body, an abutting heat conduction mechanism embedded inside the epoxy resin ring, the abutting heat conduction mechanism including a self-exchange cooling ring, a heat dissipation ring network and multiple heat conduction rods, the two ends of the multiple heat conduction rods being fixedly connected to the self-exchange cooling ring and the heat dissipation ring network respectively, the self-exchange cooling ring including multiple unidirectional mixed cooling tubes connected end to end.

[0007] Furthermore, the unidirectional mixing cooling tube includes a solid ring, a U-shaped ring, and a flat ring. The solid ring is fixedly connected between the two ends of the U-shaped ring. The U-shaped ring and the flat ring are an integral structure, and the ends of the U-shaped ring, the solid ring, and the flat ring are all on the same horizontal line. Since all three are on the same horizontal line, they can exert the same squeezing force on the coil surface inside the epoxy resin solid ring, thereby effectively suppressing the coil from loosening and effectively avoiding the situation where the loosening range expands due to uneven local force.

[0008] Furthermore, both the U-shaped ring and the flat ring are hollow structures, and the interior of both the U-shaped ring and the flat ring is filled with water. The water inside can quickly remove heat from the surface of the coil in case of abnormal heating, thereby effectively suppressing the influence range of the heat generated during the coil burnout process, effectively reducing the losses caused by coil burnout and the safety hazards to personnel.

[0009] Furthermore, the water filling volume inside the U-shaped ring is 75-85%, and the water filling volume inside the flat ring is 100%. This allows the water to absorb heat when the coil is at risk of burning out due to heat rise caused by coil loosening. After a period of time, the water inside the flat ring attached to the coil surface heats up and generates water vapor, which compresses the outer membrane, causing it to expand. This allows water from the flat ring to enter the U-shaped ring until the U-shaped ring is full. Then, the water inside the U-shaped ring passes through the selectively permeable membrane and enters the adjacent flat ring, thus achieving water flow and exchange between multiple unidirectional mixing cooling tubes, resulting in a better cooling effect for the coil.

[0010] Furthermore, an external deformation membrane is fixedly connected between the ends of the flat ring and the U-shaped ring, and a selective permeable membrane is connected between the flat ring and the U-shaped ring on another adjacent unidirectional mixing cooling tube.

[0011] Furthermore, the selected permeable membrane is made of a one-way permeable material, such as a composite fiber membrane with one-way permeability, which allows water in the U-shaped ring to flow into the flat ring, while water in the flat ring cannot enter the U-shaped ring, effectively ensuring the flow and exchange of water in multiple one-way mixing cooling tubes. The shape-changing membrane has an elastic multi-microporous structure, which makes the micropores larger after being expanded under force, enabling permeability on both sides and facilitating the passage of water.

[0012] Furthermore, the heat dissipation ring includes a heat-conducting mesh fixedly connected to multiple heat-conducting rods. Multiple heat-conducting support rods are fixedly connected to the end of the heat-conducting mesh away from the coil. Heat-conducting contacts are fixedly connected to the ends of the heat-conducting support rods. Both the heat-conducting rods and the heat dissipation ring are used for heat conduction, so that the heat generated by the coil when the temperature rises abnormally under abnormal conditions can be quickly discharged to the outside, thereby effectively reducing the impact caused by the coil burning out or in situations where there is a risk of burning out, and effectively reducing safety hazards and property losses.

[0013] Furthermore, the heat-conducting rod, heat-conducting mesh, heat-conducting support rod, and heat-conducting contact are all made of heat-conducting material, which effectively ensures that the heat can be quickly discharged after the coil temperature rises, effectively reducing safety hazards.

[0014] Furthermore, the interior of the flat ring is filled with multiple air bubbles, and the air bubbles are filled with air.

[0015] Furthermore, the bubble ball is made of silicone rubber, so that as the water in the flat ring absorbs more and more heat, the bubble ball will also gradually heat up, and the air inside it will expand. At this time, the bubble ball will also increase in size. Due to its increased volume, the saturated water in the flat ring will be squeezed, causing the outer membrane to deform, thereby allowing the water in the flat ring to enter the U-shaped ring and complete the water exchange flow. The bubble ball wall thickness is 0.5-1mm. If it is too thick, it is difficult to deform, which will affect the water exchange flow between the flat ring and the U-shaped ring. If it is too thin, it is easy to break during the heating expansion process.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0017] This invention utilizes a heat-conducting mechanism to limit and restrict coil movement, effectively preventing loosening. Furthermore, if loosening does occur, multiple unidirectional mixing cooling tubes apply uniform pressure to the coil surface, preventing uneven pressure from causing further loosening. Additionally, during abnormal coil temperature increases, the unidirectional mixing cooling tubes automatically exchange water, promptly transferring and absorbing heat generated by the coil. This effectively suppresses the impact of heat generated during abnormal coil temperature rises, significantly reducing safety hazards. Attached Figure Description

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0019] Appendix Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Appendix Figure 2 This is a top view of the structure of this utility model;

[0021] Appendix Figure 3 This is a schematic diagram of the epoxy resin solid ring structure of this utility model;

[0022] Appendix Figure 4 This is a schematic diagram of the cross-section of the present invention;

[0023] Appendix Figure 5 for Figure 4 Schematic diagram of the structure at point A;

[0024] Appendix Figure 6 This is a structural schematic diagram of the cross-section of the unidirectional mixing heat-reducing pipe of this utility model;

[0025] Appendix Figure 7 This is a schematic diagram showing the flow direction of water in the unidirectional mixing cooling tube when the coil of this utility model experiences abnormal heating.

[0026] The components include: 1. Device body, 2. Insulating plate, 3. Terminal block, 4. Connecting rod, 5. Compression spring, 6. Coil, 7. Iron core, 8. Epoxy resin solid ring, 81. Self-exchanging heat dissipation ring, 811. Solid ring, 812. U-shaped ring, 813. Flat ring, 82. Heat-conducting rod, 83. Heat dissipation ring mesh, 831. Heat-conducting mesh, 832. Heat-conducting support rod, 833. Heat-conducting contact point, 9. Shape variable film, 10. Selective permeable film. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Please see Figure 1-2 The modular hot-transfer anti-loosening coil device of the present invention includes a device body 1. Insulating plates 2 are fixedly connected to the left and right inner walls of the device body 1. An iron core 7 is installed between the two insulating plates 2. A coil 6 is wound around the outer end of the iron core 7. Two terminals 3 are installed on the upper end of the right insulating plate 2. A connecting rod 4 is installed on the right end of the device body 1. A compression spring 5 is sleeved on the outer end of the connecting rod 4. An epoxy resin fixing ring 8 is poured into the gap between the outer end of the coil 6 and the inner wall of the device body 1.

[0029] Please see Figure 3-4The epoxy resin solid ring 8 is embedded with a heat-conducting mechanism, which includes a self-exchange cooling ring 81, a heat dissipation ring 83 and multiple heat-conducting rods 82. The two ends of the multiple heat-conducting rods 82 are fixedly connected to the self-exchange cooling ring 81 and the heat dissipation ring 83 respectively. The self-exchange cooling ring 81 includes multiple unidirectional mixed cooling tubes connected end to end.

[0030] Please see Figure 6 The unidirectional hybrid cooling tube includes a solid ring 811, a U-shaped ring 812, and a flat ring 813. The solid ring 811 is fixedly connected between the two ends of the U-shaped ring 812. The U-shaped ring 812 and the flat ring 813 are an integral structure, and the ends of the U-shaped ring 812, the solid ring 811, and the flat ring 813 are all on the same horizontal line. The fact that all three are on the same horizontal line can exert the same squeezing force on the surface of the coil 6 inside the epoxy resin solid ring 8, thereby effectively inhibiting the loosening of the coil 6 and effectively avoiding the expansion of the loosening range due to uneven local force. The U-shaped ring 812 and the flat ring 813 are both hollow structures and are filled with water. Through the water inside, the heat carried away from the surface of the coil under abnormal heating conditions can be quickly removed, thereby effectively suppressing the influence range of the heat generated during the burning process of the coil, effectively reducing the loss caused by the burning of the coil 6 and the safety hazards to personnel.

[0031] The U-shaped ring 812 is filled with 75-85% water, while the flat ring 813 is filled with 100% water. This ensures that if the coil is at risk of burning out due to heat gain caused by loosening of coil 6, the water absorbs heat, and after a period of time, [refer to...]. Figure 7 The water inside the flat ring 813 attached to the surface of coil 6 generates water vapor as its temperature rises. This vapor compresses the shape-changing membrane 9, causing it to expand. This allows the water inside the flat ring 813 to enter the U-shaped ring 812. Once the U-shaped ring 812 is filled, the water inside it passes through the selective permeable membrane 10 and enters the adjacent flat ring 813. This achieves water flow and exchange between multiple unidirectional mixing cooling tubes, resulting in a better cooling effect for coil 6.

[0032] The flat ring 813 is filled with multiple air bubbles inside the water. The air bubbles are made of silicone rubber. As the water inside the flat ring 813 absorbs more and more heat, the air inside the air bubbles also gradually heats up. As the air inside the air expands, the air bubbles also grow larger. Due to the increase in volume, the saturated water inside the flat ring 813 is compressed, causing the outer membrane 9 to deform. This allows the water inside the flat ring 813 to enter the U-shaped ring 812, completing the water exchange flow. The wall thickness of the air bubbles is 0.5-1mm. If it is too thick, it is difficult for it to deform, which will affect the water exchange flow between the flat ring 813 and the U-shaped ring 812. If it is too thin, it is easy to break during the thermal expansion process.

[0033] A shape-changing membrane 9 is fixedly connected between the ends of the flat ring 813 and the U-shaped ring 812. A selective permeability membrane 10 is connected between the flat ring 813 and the U-shaped ring 812 on another adjacent unidirectional mixing cooling tube. The selective permeability membrane 10 is made of a unidirectional water-permeable material, such as a composite fiber membrane with unidirectional water permeability, so that water in the U-shaped ring 812 can flow into the flat ring 813, while water in the flat ring 813 cannot enter the U-shaped ring 812, effectively ensuring the flow and exchange of water in multiple unidirectional mixing cooling tubes. The shape-changing membrane 9 has an elastic multi-microporous structure, so that after it expands under force, the micropores become larger, enabling permeability on both sides and facilitating the passage of water.

[0034] Please see Figure 5 The heat dissipation ring 83 includes a heat-conducting mesh 831 fixedly connected to multiple heat-conducting rods 82. Multiple heat-conducting support rods 832 are fixedly connected to the end of the heat-conducting mesh 831 away from the coil 6. Heat-conducting contacts 833 are fixedly connected to the ends of the heat-conducting support rods 832. Both the heat-conducting rods 82 and the heat dissipation ring 83 are used for heat conduction, so that the heat generated by the coil 6 when the temperature rises abnormally can be quickly discharged to the outside, thereby effectively reducing the impact caused by the coil 6 burning out or in the event of a burnout risk, effectively reducing safety hazards and property losses. The heat-conducting rods 82 and the heat-conducting mesh 831, as well as the heat-conducting support rods 832 and the heat-conducting contacts 833, are all made of heat-conducting materials, effectively ensuring that the heat can be quickly discharged to the outside after the temperature of the coil 6 rises, effectively reducing safety hazards.

[0035] The abutting heat conduction mechanism can act as a resisting limit for coil 6, effectively preventing coil 6 from becoming loose. Furthermore, if coil 6 does become loose, multiple unidirectional mixing cooling tubes can exert equal pressure on the surface of coil 6, effectively preventing the loosening area from expanding due to uneven localized force. Simultaneously, during abnormal temperature rises in coil 6, the abutting heat conduction mechanism can automatically complete water flow exchange within the unidirectional mixing cooling tubes, thereby promptly transferring and absorbing the heat generated by coil 6 outwards. This effectively suppresses the impact range of heat generated during abnormal temperature rises in coil 6, effectively reducing safety hazards.

[0036] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model; all technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of this utility model.

Claims

1. A modular hot-transfer anti-loosening coil device for opening and closing circuit breakers, comprising a device body (1), wherein insulating plates (2) are fixedly connected to the left and right inner walls of the device body (1), an iron core (7) is installed between the two insulating plates (2), a coil (6) is wound around the outer end of the iron core (7), two terminals (3) are installed on the upper end of the insulating plate (2) on the right side, a connecting rod (4) is installed on the right end of the device body (1), and a compression spring (5) is sleeved on the outer end of the connecting rod (4), characterized in that: An epoxy resin ring (8) is cast into the gap between the outer end of the coil (6) and the inner wall of the device body (1). An abutting heat conduction mechanism is embedded inside the epoxy resin ring (8). The abutting heat conduction mechanism includes a self-exchange cooling ring (81), a heat dissipation ring (83) and multiple heat conduction rods (82). The two ends of the multiple heat conduction rods (82) are fixedly connected to the self-exchange cooling ring (81) and the heat dissipation ring (83) respectively. The self-exchange cooling ring (81) includes multiple unidirectional mixed cooling tubes connected end to end.

2. A modular opening and closing transfer coil assembly as defined in claim 1 wherein: The unidirectional mixing cooling tube includes a solid ring (811), a U-shaped ring (812), and a flat ring (813). The solid ring (811) is fixedly connected between the two ends of the U-shaped ring (812). The U-shaped ring (812) and the flat ring (813) are an integral structure, and the ends of the U-shaped ring (812), the solid ring (811), and the flat ring (813) are all on the same horizontal line.

3. A modular opening and closing transfer coil assembly as defined in claim 2 wherein: Both the U-shaped ring (812) and the flat ring (813) are hollow structures, and the interiors of both the U-shaped ring (812) and the flat ring (813) are filled with water.

4. A modular opening and closing transfer coil assembly as defined in claim 3 wherein: The water filling volume inside the U-shaped ring (812) is 75-85%, and the water filling volume inside the flat ring (813) is 100%.

5. A modular opening and closing transfer coil assembly as defined in claim 4 wherein: A shape-changing membrane (9) is fixedly connected between the ends of the flat ring (813) and the U-shaped ring (812), and a selective permeable membrane (10) is connected between the flat ring (813) and the U-shaped ring (812) on another adjacent unidirectional mixing cooling tube.

6. A modular opening and closing transfer coil assembly as defined in claim 5 wherein: The selective permeable membrane (10) is made of a one-way permeable material, and the shape-changing membrane (9) is an elastic multi-microporous structure.

7. A modular opening and closing transfer coil assembly as defined in claim 1 wherein: The heat dissipation ring (83) includes a heat-conducting mesh (831) fixedly connected to a plurality of heat-conducting rods (82). A plurality of heat-conducting support rods (832) are fixedly connected to one end of the heat-conducting mesh (831) away from the coil (6). A heat-conducting contact (833) is fixedly connected to the end of the heat-conducting support rod (832).

8. A modular opening and closing transfer coil assembly as defined in claim 7 wherein: The heat-conducting rod (82), heat-conducting mesh (831), heat-conducting support rod (832), and heat-conducting contact (833) are all made of heat-conducting material.

9. A modular hot-transfer anti-loosening coil device for opening and closing according to claim 5, characterized in that: The flat ring (813) is filled with multiple air bubbles in the water, and the air bubbles are filled with air.

10. A modular opening and closing transfer coil assembly as defined in claim 9 wherein: The bubble ball is made of silicone rubber and has a wall thickness of 0.5-1mm.

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