External cementing high-strength outdoor isolating switch

Abstract

The utility model relates to the field of outdoor alternating-current isolating switches, and discloses an externally-glued high-strength outdoor isolating switch, which comprises a base, support porcelain pieces and a conductive mechanism, the support porcelain pieces and the conductive mechanism are mounted at two ends of the base, wiring mechanisms are mounted on the two support porcelain pieces, the two wiring mechanisms are connected and disconnected through the conductive mechanism, and each support porcelain piece comprises a porcelain bottle. The end portion of the porcelain bottle is provided with a protection assembly, the protection assembly comprises a fitting and a cement solidification layer, the fitting is sleeved outside the end portion of the porcelain bottle, the cement solidification layer is filled between the fitting and the end portion of the porcelain bottle, the porcelain bottle can expand with heat and contract with cold when environment temperature changes, and the fitting wraps the porcelain bottle. According to the porcelain insulator, the temperature change of the porcelain insulator can be reduced, the cement solidification layer is filled between the fitting and the porcelain insulator, the cement solidification layer has a certain buffer effect, when the porcelain insulator is influenced by the external temperature change, the cement solidification layer can play the buffer effect, and the porcelain insulator is prevented from being damaged by internal stress generated by the temperature change of the porcelain insulator.

Description

Technical Field

[0001] This application relates to the field of outdoor AC disconnect switches, and in particular to a high-strength outdoor disconnect switch with external adhesive mounting. Background Technology

[0002] Outdoor AC disconnect switches typically employ a single-pole design and are suitable for single-phase or three-phase AC 50Hz power systems. This disconnect switch consists of a base, insulating supports, conductive parts, and an operating mechanism. Each pole has two supports, each with a conductive blade mounted at its upper end. The contact points of the blade contacts are located in the middle of the two supports.

[0003] Outdoor AC disconnect switches possess excellent insulation performance and mechanical stability. They typically use porcelain insulators as the electrical insulation material. However, in areas with significant diurnal temperature variations, the porcelain insulator shrinks as the temperature decreases at night, leading to increased internal stress. Since the insulator lacks the structural support to withstand this additional stress, cracks or even breakage may occur, reducing its insulation performance. During the day, as the temperature rises, the thermal motion of the molecules and atoms within the insulator increases, widening the distance between them and causing the insulator to expand in volume. Under prolonged diurnal temperature variations, the insulator continuously experiences contraction and expansion stress, increasing the risk of breakage and reducing the reliability and safety of the outdoor AC disconnect switch. Utility Model Content

[0004] To avoid the risk of porcelain insulators breaking due to temperature, a high-strength outdoor disconnect switch with external adhesive is provided.

[0005] The above-mentioned objective of this application is achieved through the following technical solution:

[0006] An externally bonded high-strength outdoor disconnect switch includes a base, ceramic support members installed at both ends of the base, and a conductive mechanism. Wiring mechanisms are installed on the two ceramic support members, and the two wiring mechanisms are connected and disconnected through the conductive mechanism. Each ceramic support member includes a ceramic insulator, and a protective component is installed at the end of the ceramic insulator. The protective component includes a hardware and a cement curing layer. The hardware is sleeved on the outside of the end of the ceramic insulator, and the cement curing layer is filled between the hardware and the end of the ceramic insulator.

[0007] By adopting the above technical solution, the porcelain insulator exhibits thermal expansion and contraction when the ambient temperature changes. When the ambient temperature drops, the porcelain insulator contracts. If the porcelain insulator is directly exposed to the external environment, this temperature change will be more drastic, causing stress due to thermal expansion and contraction, which may lead to cracking or damage. By adding hardware to the outside of the porcelain insulator, the impact of this temperature change can be mitigated. Since the expansion coefficients of the hardware and the porcelain insulator are different, a cement hardening layer is filled between them. This cement hardening layer has a certain buffering effect; when the porcelain insulator is affected by external temperature changes, the cement hardening layer can buffer the internal stress caused by temperature changes, thus reducing damage to the porcelain insulator. Furthermore, the cement hardening layer has a high heat capacity, capable of absorbing and releasing a large amount of heat. When the ambient temperature changes, the cement hardening layer can absorb some of the heat, mitigating the impact of temperature changes on the porcelain insulator.

[0008] Optionally, the protective assembly also includes an tarpaulin pad, one side of which abuts against the end of the porcelain insulator, and the other side of which abuts against the side of the fitting facing the porcelain insulator.

[0009] By adopting the above technical solution, the two ends of the porcelain bottle are areas of stress concentration. When the porcelain bottle is installed on the base, the different expansion coefficients between the porcelain bottle and the hardware reduce the reliability between the hardware and the porcelain bottle. The addition of an oil felt pad can buffer between the porcelain bottle and the hardware, improve the stability between the porcelain bottle and the hardware, and enhance the applicability.

[0010] Optionally, the outer peripheral sidewall of the porcelain bottle facing the cement curing layer is also coated with an asphalt layer.

[0011] By adopting the above technical solution, the asphalt layer has good waterproof performance, which can effectively prevent water from penetrating into the joint between the cement curing layer and the porcelain bottle, thereby avoiding corrosion and damage caused by water intrusion and improving the safety performance between the cement curing layer and the porcelain bottle.

[0012] Optionally, a raised ring is installed on the side of the fitting facing the cement curing layer.

[0013] By adopting the above technical solution, the contact area between the fittings and the cement curing layer can be increased, thereby improving the firmness and stability between the fittings and the cement curing layer. At the same time, it helps to disperse pressure, reduce damage caused by excessive local stress, and improve the connection reliability between the fittings and the cement curing layer.

[0014] Optionally, the convex ring has a serrated shape.

[0015] By adopting the above technical solution, the serrated convex ring can further improve the tensile strength of the porcelain bottle, thereby increasing its lifespan.

[0016] Optionally, the wiring mechanism includes a support frame and a terminal block, with the conductive mechanism in contact with the upper surface of the terminal block, and the fittings fixedly connected to the lower surface of the terminal block via the support frame.

[0017] By adopting the above technical solution, the terminal block and the hardware are connected by a support frame. On the one hand, this increases the distance between the conductive mechanism and the hardware, preventing the conductive mechanism from discharging and damaging the hardware, and improving the safety performance between the conductive mechanism and the hardware.

[0018] Optionally, the support frame includes a pressing part, which is parallel to the terminal block, and the upper surface of the pressing part abuts against the lower surface of the terminal block.

[0019] By adopting the above technical solution, the contact area between the pressing part and the terminal block is increased, the support effect of the support frame on the terminal block is better, and the connection strength between the support frame and the terminal block is improved.

[0020] Optionally, the length of the pressing part along the axis of the vertical support ceramic piece is less than the outer diameter of the fitting.

[0021] By adopting the above technical solution, the length of the pressing part is less than the outer diameter of the hardware. The pressing part abuts against the terminal block. Since the terminal block is made of copper, the contact area of ​​the terminal block is reduced, which reduces the consumption of terminal block materials and lowers the actual production cost.

[0022] Optionally, the outer circumferential diameter of the fitting facing the end of the porcelain bottle is larger than the outer circumferential diameter facing the middle of the porcelain bottle.

[0023] By adopting the above technical solution, the two ends of the porcelain bottle are areas of stress concentration. Therefore, setting the outer diameter of the fitting towards the end of the porcelain bottle to be larger than the outer diameter towards the middle of the porcelain bottle allows more cement curing layer to be filled at the end of the fitting towards the porcelain bottle. This can better disperse the stress caused by temperature changes at the end of the porcelain bottle, increase the overall structural stability of the fitting, and thus protect the porcelain bottle.

[0024] In summary, this application has at least the following beneficial effects:

[0025] 1. The fittings tightly hold the porcelain insulator from the outside in, reducing the shrinkage of the insulator in low-temperature environments, minimizing the impact of environmental factors on the insulator, and improving the insulation performance of the insulator.

[0026] 2. The expansion coefficients of the hardware and the porcelain bottle are different. A cement curing layer is filled between the hardware and the porcelain bottle. The cement curing layer can play a buffering role and reduce the stress on the porcelain bottle caused by temperature changes.

[0027] 3. The tar paper pad abuts against the hardware and the porcelain bottle on both sides. Due to the different expansion coefficients between the porcelain bottle and the hardware, the tar paper pad can buffer the porcelain bottle and the hardware, thus enhancing its applicability.

[0028] 4. The asphalt layer has good waterproof performance, which can effectively prevent water from penetrating into the joint between the cement curing layer and the porcelain insulator, thereby avoiding corrosion and damage caused by water intrusion and improving the safety performance between the cement curing layer and the porcelain insulator. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of a high-strength outdoor disconnect switch with external adhesive bonding;

[0030] Figure 2 A cross-sectional view of an externally bonded high-strength outdoor disconnect switch;

[0031] Figure 3 for Figure 1 A magnified view of the area at point B;

[0032] Figure 4 This is an exploded diagram showing the hinged connection between the conductive mechanism and the wiring mechanism.

[0033] Reference numerals: 1. Base; 2. Support ceramic piece; 21. Porcelain insulator; 211. Insulating ring; 22. Protective component; 221. Fittings; 2211. Raised ring; 222. Cement curing layer; 223. Roofing pad; 224. Asphalt layer; 3. Wiring mechanism; 31. Terminal block; 32. Support frame; 321. Connecting part; 322. Pressing part; 33. Hinge seat; 331. Hinge hole; 4. Conductive mechanism; 41. Conductive plate; 42. Connecting rod; 43. Conductive rod; 44. Fastener. Detailed Implementation

[0034] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0035] As attached Figure 1 As shown, an externally bonded high-strength outdoor disconnect switch includes a base 1, a support ceramic piece 2, a wiring mechanism 3, and a conductive mechanism 4.

[0036] There are two ceramic support pieces 2, which are vertically installed at both ends of the base 1.

[0037] The support ceramic component 2 includes a ceramic bottle 21 and a protective component 22. There are two ceramic bottles 21. An annular insulating ring 211 is installed on the outer peripheral side wall of each ceramic bottle 21. Both ceramic bottles 21 are vertically located on the upper surface of the base 1, and the ceramic bottles 21 are connected to the base 1 through the protective component 22.

[0038] There are four protective components 22. Two protective components 22 are located at the top and bottom of one of the porcelain bottles 21, respectively, and the other two protective components 22 are located at the top and bottom of the other porcelain bottle 21, respectively.

[0039] As attached Figure 1 and attached Figure 2 As shown, the protective component 22 includes a hardware 221, a cement curing layer 222, and an asphalt pad 223.

[0040] The fitting 221 is bowl-shaped and made of ductile iron. The opening of the fitting 221 faces the end of the porcelain bottle 21. The end of the porcelain bottle 21 is inserted into the fitting 221 from the opening. The outer diameter of the fitting 221 facing the end of the porcelain bottle 21 is larger than the outer diameter facing the middle of the porcelain bottle 21.

[0041] The fitting 221 wraps around the end of the porcelain bottle 21, and a cement curing layer 222 is filled in the gap between the fitting 221 and the porcelain bottle 21. This allows the fitting 221 to hold the cement curing layer 222 and the porcelain bottle 21 tightly from the outside in, improving the reliability of the connection between the fitting 221 and the porcelain bottle 21. At the same time, due to the difference in the coefficient of expansion between the fitting 221 and the porcelain bottle 21, the cement curing layer 222 has a certain buffering effect. When the porcelain bottle 21 is affected by external temperature changes, the cement curing layer 222 can play a buffering role, reducing the stress generated by the temperature change in the porcelain bottle 21.

[0042] A convex ring 2211 is also installed on the circumferential sidewall of the fitting 221 facing the cement curing layer 222. The convex ring 2211 is serrated in shape. The convex ring 2211 increases the contact area between the fitting 221 and the cement curing layer 222, thereby improving the firmness and stability between the fitting 221 and the cement curing layer 222.

[0043] An asphalt layer 224 is also provided between the cement curing layer 222 and the end of the porcelain insulator 21. The asphalt layer 224 is installed on the circumferential sidewall of the end of the porcelain insulator 21 facing the cement curing layer 222. The asphalt layer 224 has good waterproof performance and can effectively prevent water from penetrating into the joint between the cement curing layer 222 and the porcelain insulator 21, thereby avoiding corrosion and damage caused by water intrusion and improving the safety performance between the cement curing layer 222 and the porcelain insulator 21.

[0044] The tar paper pad 223 is located inside the fitting 221. One side of the tar paper pad 223 abuts against the cement curing layer 222 and the end of the porcelain bottle 21, while the other side of the tar paper pad 223 abuts against the fitting 221. Due to the different expansion coefficients between the porcelain bottle 21 and the fitting 221, the tar paper pad 223 can buffer between the porcelain bottle 21 and the fitting 221, thereby improving the structural stability between the porcelain bottle 21 and the fitting 221 and enhancing its applicability.

[0045] As attached Figure 1 and attached Figure 3 As shown, there are two wiring mechanisms 3, which are respectively installed on the top of the two support ceramic parts 2.

[0046] The wiring mechanism 3 includes a wiring board 31 and a support frame 32. There are two support frames 32. The two support frames 32 are fixedly connected to the hardware 221 at the top of the two pillar ceramic parts 2. The support frame 32 includes a connecting part 321 and a pressing part 322. There are two connecting parts 321. Both connecting parts 321 are fixedly connected to the hardware 221 at the top of the pillar ceramic parts 2.

[0047] The two ends of the pressing part 322 are fixedly connected to the two connecting parts 321 respectively. The side of the pressing part 322 facing the hardware 221 and the side of the two connecting parts 321 opposite to it form a closed space, which increases the distance between the pressing part 322 and the hardware 221. The pressing part 322 is perpendicular to the terminal block 31. The upper surface of the pressing part 322 abuts against the lower surface of the terminal block 31, which increases the contact area between the pressing part 322 and the terminal block 31 and improves the connection strength between the support frame 32 and the terminal block 31.

[0048] There are two terminal blocks 31. One end of each terminal block 31 is fixedly connected to the pressing part 322 of each of the two support frames 32. The other end of each terminal block 31 is used for cable threading and connection.

[0049] As attached Figure 1 and attached Figure 4 As shown, the wiring mechanism 3 also includes a hinge seat 33, which is located above one of the wiring plates 31 and is fixedly connected to the wiring plate 31. The hinge seat 33 also has a hinge hole 331 that passes through the hinge seat 33.

[0050] The conductive mechanism 4 is located above the wiring mechanism 3. The conductive mechanism 4 abuts against the upper surface of the wiring plate 31. The conductive mechanism 4 includes two conductive plates 41, which are parallel to each other. A connecting rod 42 and a conductive rod 43 are respectively installed at both ends of the two conductive plates 41.

[0051] The connecting rod 42 is located at one end near the hinge seat 33, and the connecting rod 42 passes through the hinge hole 331 and is hinged to the hinge seat 33. When the two relatively parallel conductive plates 41 are lowered toward the other support ceramic piece 2 with the connecting rod 42 as the axis, the conductive rod 43 abuts against the terminal block 31 near the end of the conductive rod 43. Thus, the two terminal blocks 31 achieve electrical connection and disconnection through the conductive rod 43 and the conductive plate 41.

[0052] The conductive mechanism 4 also includes two fasteners 44. One fastener 44 is installed on one end of the connecting rod 42 that passes through the two conductive plates 41, and the other fastener 44 is installed on one end of the conductive rod 43 that passes through the two conductive plates 41, thereby fixing the connecting rod 42, the conductive rod 43 and the two conductive plates 41.

[0053] The effect of this embodiment:

[0054] In some regions with large diurnal temperature differences, when the ambient temperature drops, the fittings 221 and the cement curing layer 222 wrap around the end of the porcelain insulator 21 from the outside in. The end of the porcelain insulator 21 is not in contact with the outside world. The temperature from the outside world will first pass through the fittings 221 and the cement curing layer 222 around the end of the porcelain insulator 21 before reaching the end of the porcelain insulator 21, which can reduce the impact of temperature changes on the end of the porcelain insulator 21.

[0055] When the ambient temperature decreases or increases, the thermal motion of molecules and atoms inside the porcelain insulator 21 increases, causing the distance between them to widen and resulting in volume expansion of the porcelain insulator 21. Since the fittings 221 and the cement-cured layer 222 wrap around the ends of the porcelain insulator 21 from the outside in, and the fittings 221 are made of ductile iron with high strength, they prevent the ends of the porcelain insulator 21 from expanding. At the same time, the cement-cured layer 222 provides a certain buffering effect. When the ends of the porcelain insulator 21 expand, the cement-cured layer 222 acts as a buffer, reducing the stress generated by the expansion.

[0056] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A high-strength outdoor disconnect switch with external adhesive mounting, comprising a base (1), ceramic support pieces (2) mounted at both ends of the base (1), and a conductive mechanism (4), wherein wiring mechanisms (3) are mounted on the two ceramic support pieces (2), and the two wiring mechanisms (3) are connected and disconnected through the conductive mechanism (4), characterized in that, The support ceramic component (2) includes a ceramic bottle (21), and a protective component (22) is installed at the end of the ceramic bottle (21). The protective component (22) includes a fitting (221) and a cement curing layer (222). The fitting (221) is sleeved on the outside of the end of the ceramic bottle (21), and the cement curing layer (222) is filled between the fitting (221) and the end of the ceramic bottle (21).

2. The high-strength outdoor disconnect switch with external adhesive mounting according to claim 1, characterized in that, The protective component (22) also includes an tarpaulin pad (223), one side of which abuts against the end of the porcelain bottle (21), and the other side of which abuts against the side of the fitting (221) facing the porcelain bottle (21).

3. The high-strength outdoor disconnect switch with external adhesive mounting according to claim 1, characterized in that, The porcelain bottle (21) is also coated with an asphalt layer (224) on its outer peripheral sidewall facing the cement curing layer (222).

4. The high-strength outdoor disconnect switch with external adhesive as described in claim 1, characterized in that, The fitting (221) is fitted with a raised ring (2211) on the side facing the cement curing layer (222).

5. A high-strength outdoor disconnect switch with external adhesive mounting according to claim 4, characterized in that, The convex ring (2211) has a serrated shape.

6. The high-strength outdoor disconnect switch with external adhesive mounting according to claim 1, characterized in that, The wiring mechanism (3) includes a support frame (32) and a wiring plate (31). The conductive mechanism (4) abuts against the upper surface of the wiring plate (31), and the fitting (221) is fixedly connected to the lower surface of the wiring plate (31) through the support frame (32).

7. A high-strength outdoor disconnect switch with external adhesive mounting according to claim 6, characterized in that, The support frame (32) includes a pressing part (322), which is parallel to the terminal block (31), and the upper surface of the pressing part (322) abuts against the lower surface of the terminal block (31).

8. A high-strength outdoor disconnect switch with external adhesive mounting according to claim 7, characterized in that, The length of the pressing part (322) along the axis of the vertical support ceramic piece (2) is less than the outer diameter of the fitting (221).

9. A high-strength outdoor disconnect switch with external adhesive mounting according to claim 1, characterized in that, The outer diameter of the fitting (221) facing the end of the porcelain bottle (21) is greater than the outer diameter facing the middle of the porcelain bottle (21).

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