Outdoor high-voltage alternating-current jet drop-out fuse

Abstract

The utility model discloses an outdoor high-voltage alternating-current jet drop-out fuse, belongs to the technical field of electrical switch equipment, and is used for providing an outdoor high-voltage alternating-current jet drop-out fuse with higher stability. The outdoor high-voltage alternating-current jet drop-out fuse comprises a fuse carrier, and the two ends of the fuse carrier are fixedly connected with wiring terminals through bridging plates respectively; fuse pieces located between the fuse carriers are connected between the wiring terminals, an insulator is further fixedly connected between the two bridging plates, a mounting plate is fixedly connected to the insulator, the outer surface of the insulator is sleeved with a reinforcing assembly, the reinforcing assembly is further connected with the mounting plate, the reinforcing assembly comprises a hoop, and the hoop is tightly hooped on the smooth outer surface of the insulator. A reinforcing plate is fixedly connected to the outer surface of the hoop and fixedly connected with the mounting plate. On the basis of an existing fuse, the reinforcing assembly is additionally arranged to serve as an anti-falling device of the mounting plate, it is guaranteed that the mounting plate does not fall off under the normal use condition of the fuse, and after improvement, the mounting plate of the fuse can be effectively prevented from falling off after long-time operation.

Description

Technical Field

[0001] This application relates to the technical field of electrical switchgear, and particularly to an outdoor high-voltage AC jet drop fuse. Background Art

[0002] As a commonly used electrical switchgear, the stability of the drop fuse directly affects the stable operation of the power grid.

[0003] At present, most of the insulators of the fuse use high-strength porcelain insulators, and the mounting plates all adopt an insertion structure. However, a disadvantage of the insertion mechanism is that during long-term operation, due to the influence of factors such as the environment and operation, the mounting plate may fall off, resulting in the fuse falling off and affecting the safe and stable operation of the power grid. Summary of the Invention

[0004] The purpose of this application is to provide an outdoor high-voltage AC jet drop fuse with higher stability.

[0005] To achieve the above purpose, this application provides an outdoor high-voltage AC jet drop fuse: including a fuse carrier, both ends of the fuse carrier are fixedly connected with terminal blocks through bridging plates respectively, a fuse element located between the fuse carriers is connected between the terminal blocks, an insulator is fixedly connected between the two bridging plates, a mounting plate is fixedly connected to the insulator, a reinforcement assembly is sleeved on the outer surface of the insulator, and the reinforcement assembly is also connected to the mounting plate, and together with the mounting plate, it bears the acting force received when connected to the cable support.

[0006] As a preference, the reinforcement assembly includes a hoop, the hoop is clamped tightly on the smooth outer surface of the insulator, a reinforcing plate is fixedly connected to the outer surface of the hoop, and the reinforcing plate is fixedly connected to the mounting plate, which is used to disperse the stress that the mounting plate may bear.

[0007] As a preference, the mounting plate includes a plugging rod inserted into the insulator, the end of the plugging rod has a first connecting plate, the reinforcing plate includes an extension plate integrated with the hoop, the end of the extension plate has a second connecting plate, and the second connecting plate is fixedly connected to the first connecting plate through a connecting piece, and both of them are flattened by cylindrical extrusion.

[0008] As a preference, the first connecting plate is bent relative to the plugging rod, there is a bending transition part between the second connecting plate and the extension plate, and the surface of the second connecting plate opposite to the first connecting plate is suitable for fitting, which is beneficial to evenly transfer the force.

[0009] As a preference, a first series connection hole penetrating opposite surfaces is formed in the first connection plate, a second series connection hole corresponding to the first series connection hole is formed in the second connection plate, the connecting member includes a bolt and a nut, and the bolt passes through the first series connection hole and the second series connection hole and then cooperates with the nut; a first mounting hole penetrating opposite surfaces is formed in the first connection plate, and a second mounting hole aligned with the first mounting hole is formed in the second connection plate for connecting with a cable bracket.

[0010] As a preference, the hoop is divided into two parts, and the two parts are also connected by the connecting member. Each part includes a hoop plate, the extension plate is located on the outer surface of one of the hoop plates, both ends of the two hoop plates have ear plates, through holes are formed in the ear plates, and the bolt passes through the two aligned through holes and then cooperates with the nut, so that the hoop is tightened on the smooth surface of the insulator.

[0011] As a preference, an elastic washer sleeved on the bolt is arranged between the nut and the ear plate to reduce the loss during the disassembly and assembly process.

[0012] As a preference, a voltage dividing pad is arranged on the inner wall of the hoop, the insulator is made of a high-strength ceramic material, and the voltage dividing pad is made of a silicone rubber material, which can effectively avoid hard contact between the hoop and the insulator.

[0013] As another preference, the hoop plates are both semicircular, and the two ends of the two hoop plates are aligned to form a complete ring.

[0014] Further preferably, a silicone rubber sheath is sleeved on the outer surface of each hoop plate, and there is no need to use a curing glue, and it is more stable when sleeved on the hoop plate.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows:

[0016] (1) Based on the existing fuse, an enhancement component is added as an anti-dropping device for the mounting plate, which ensures that the mounting plate of the fuse does not drop under normal use conditions, and compared with the prior art, it can effectively prevent the mounting plate of the fuse from dropping after long-term operation;

[0017] (2) Based on the original fuse, a hoop structure is added and connected to the mounting plate, and a silicone rubber sheath is also added to the hoop, which can effectively adhere to the outer surface of the high-strength porcelain insulator to disperse the acting force, thereby reducing the stress generated by the hoop on the porcelain insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the first three-dimensional schematic diagram of the overall structure of the outdoor high-voltage AC jet drop fuse.

[0019] Figure 2 It is a side view of the overall structure of the outdoor high-voltage AC jet-drop fuse.

[0020] Figure 3 It is a schematic three-dimensional structure diagram of the connection between the reinforcement component and the mounting plate of the outdoor high-voltage AC jet-drop fuse.

[0021] Figure 4 It is a schematic three-dimensional structure diagram of the reinforcement component of the outdoor high-voltage AC jet-drop fuse.

[0022] Figure 5 It is a schematic three-dimensional structure diagram of the connection between the reinforcement plate and the hoop of the outdoor high-voltage AC jet-drop fuse.

[0023] Figure 6 It is a schematic three-dimensional structure diagram of the connection between the mounting plate and the insulator of the outdoor high-voltage AC jet-drop fuse.

[0024] Figure 7 It is a schematic three-dimensional structure diagram of the mounting plate of the outdoor high-voltage AC jet-drop fuse.

[0025] In the figure: 1, fuse carrier; 101, bridging plate; 2, insulator; 3, mounting plate; 301, insertion rod; 302, first connecting plate; 303, first series connection hole; 304, first mounting hole; 4, reinforcement component; 410, reinforcement plate; 411, extension plate; 412, second connecting plate; 413, second series connection hole; 414, second mounting hole; 415, bending transition part; 420, hoop; 421, hoop plate; 422, voltage-dividing pad; 423, ear plate; 424, through hole; 5, terminal; 6, connecting piece; 601, bolt; 602, nut; 7, elastic washer. Detailed implementation manners

[0026] Next, in combination with the detailed implementation manners, the present application will be further described. It should be noted that on the premise of no conflict, any combination can be formed between the following-described embodiments or technical features to form a new embodiment.

[0027] In the description of the present application, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0029] The terms "comprising" and "having" in the description and claims of this application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0030] As Figure 1-7 shown, the outdoor high-voltage AC jet-drop fuse includes a hollow fuse carrier 1. Both ends of the fuse carrier 1 are fixedly connected with terminal connectors 5 through bridging plates 101. The bridging plates 101 are usually made of insulating materials or alloy materials, and then an insulating coating is applied on the outer surface. In this way, even if both the terminal connectors 5 and the fuse carrier 1 are made of metal, they will not conduct electricity with each other. A fuse element is connected between the terminal connectors 5 and is located between the fuse carriers 1. The two terminal connectors 5 are electrically connected through the fuse element. When the current is too large, the metal material of the fuse element will be melted by the high temperature generated by itself and disconnected, thereby protecting other structures on the circuit. An insulator 2 made of high-strength ceramic material is also fixedly connected between the two bridging plates 101. The fuse carrier 1 is usually located outside the insulator 2 and they are parallel to each other.

[0031] An installation plate 3 is fixedly connected to the insulator 2. Similar to the prior art, it is used to connect the entire fuse to the cable support. There are many circular rings on the insulator 2, which can prevent rainwater from forming a water flow on its surface and electrically connecting the terminal connectors 5 to the cable support also made of alloy. An enhancement component 4 is sleeved on the outer surface of the insulator 2. The enhancement component 4 is very close to the installation plate 3 and is usually arranged in a fitting manner with the installation plate 3 in the prior art. And the enhancement component 4 is also connected to the installation plate 3 to share various stresses received by the installation plate 3. The specific structure of the enhancement component 4 includes a hoop 420. The hoop 420 is fastened on the smooth outer surface of the insulator 2. Since the hoop 420 is usually made of an alloy material with certain elasticity and toughness, in order to avoid uneven stress on the contact surface due to hard contact with the equally hard insulator 2, a voltage-sharing pad 422 made of silicone rubber material is further arranged on the inner wall of the hoop 420, which can effectively avoid damage caused by hard contact.

[0032] The clamp 420 is usually divided into two parts. Compared with the structure of a single-piece clamp 420, the two parts do not need to be subjected to reciprocating bending loads during the disassembly and assembly operations like a single integral unit. The two parts are connected by a connecting member 6, and the connecting member 6 includes a bolt 601 and a nut 602. Each part includes a semi-circular hoop plate 421. The two ends of the two hoop plates 421 have ear plates 423. The transition between the ear plate 423 and the hoop plate 421 is significantly bent. The four ear plates 423 on the two hoop plates 421 are all parallel to each other. Through holes 424 are formed in the ear plates 423 to penetrate the opposite surfaces. After the bolt 601 passes through the aligned two through holes 424, it cooperates with the nut 602 to fix the two parts of the clamp 420 together. In this embodiment, an elastic washer 7 sleeved on the bolt 601 is further provided between the nut 602 and the ear plate 423 to replace the friction between the ear plate 423 and the nut 602, which can effectively disperse the compressive stress exerted by the nut 602 on the ear plate 423, thereby reducing the material loss of the ear plate 423 and reducing the deformation amplitude.

[0033] A reinforcing plate 410 is fixedly connected to the outer surface of the clamp 420, which is the main component for dispersing the force on the mounting plate 3. The reinforcing plate 410 is fixedly connected to the mounting plate 3. Specifically: The mounting plate 3 includes a plugging rod 301 inserted into the insulator 2. Usually, a rubber layer is sleeved on the plugging rod 301 and then inserted into the insulator 2 and fixed with curing glue. The end of the plugging rod 301 has a first connecting plate 302. Usually, for the convenience of connection, the design of the mounting plate 3 is not straight, but the first connecting plate 302 has a bend relative to the plugging rod 301. The specific structure of the reinforcing plate 410 includes an extension plate 411 integrated with the clamp 420. Actually, the extension plate 411 is located on the outer surface of one of the hoop plates 421. The end of the extension plate 411 has a second connecting plate 412. In order to adapt to the shape of the mounting plate 3, there is also a bending transition part 415 between the second connecting plate 412 and the extension plate 411. This bending transition part 415 can not only make the opposite surfaces of the second connecting plate 412 and the first connecting plate 302 suitable for fitting, but also improve the anti-twisting ability of the entire reinforcing plate 410. The second connecting plate 412 is also fixedly connected to the first connecting plate 302 through the connecting member 6.

[0034] In order to realize the connection between the reinforcing plate 410 and the mounting plate 3, a first series of connecting holes 303 penetrating the opposite surfaces are formed in the first connecting plate 302, and second series of connecting holes 413 corresponding to the first series of connecting holes 303 are formed in the second connecting plate 412. After the bolt 601 passes through the first series of connecting holes 303 and the second series of connecting holes 413, it cooperates with the nut 602; The first connecting plate 302 is provided with a first mounting hole 304 penetrating the opposite surfaces, and the second connecting plate 412 is provided with a second mounting hole 414 aligned with the first mounting hole 304 for aligning with the prefabricated holes on the cable support to realize the installation and connection of the entire fuse.

[0035] Working principle: The additionally provided reinforcement structure can disperse the force between the mounting plate 3 and the insulator 2 through the larger contact area of the hoop 420, while the structure of the reinforcement plate 410 that fits the mounting plate 3 can disperse the force of the connection between the mounting plate 3 and the cable support, thereby improving the connection stability between the entire fuse and the cable support; during installation, first align the second connecting plate 412 with the first connecting plate 302, then use the connecting piece 6 to fix the two, then align another hoop plate 421 with the hoop plate 421 that has been fitted to the outer surface of the insulator 2, fix the two ends of them through other connecting pieces 6 and tighten them on the outer surface of the insulator 2, and finally fix the mounting plate 3 and the reinforcement plate 410 together on the cable support.

[0036] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. An outdoor high voltage AC jet drop fuse, characterized in that: The invention comprises a fuse carrier (1), wherein two ends of the fuse carrier (1) are respectively fixedly connected to wiring terminals (5) via bridge plates (101), a fuse located between the fuse carrier (1) is connected between the wiring terminals (5), an insulator (2) is also fixedly connected between the two bridge plates (101), a mounting plate (3) is fixedly connected to the insulator (2), a reinforcing component (4) is sleeved on the outer surface of the insulator (2), and the reinforcing component (4) is also connected to the mounting plate (3).

2. The outdoor high voltage AC jet drop fuse according to claim 1, characterized in that: The reinforcing assembly (4) comprises a clamp (420), the clamp (420) being clamped tightly on the smooth outer surface of the insulator (2), the outer surface of the clamp (420) being fixedly connected to a reinforcing plate (410), and the reinforcing plate (410) being fixedly connected to the mounting plate (3).

3. The outdoor high voltage AC jet drop fuse according to claim 2, characterized in that: The mounting plate (3) comprises a plug-in rod (301) inserted into the insulator (2), the end of the plug-in rod (301) having a first connecting plate (302), the reinforcing plate (410) comprising an extension plate (411) integral with the clamp (420), the end of the extension plate (411) having a second connecting plate (412), the second connecting plate (412) being fixedly connected to the first connecting plate (302) via a connecting piece (6).

4. The outdoor high voltage AC jet drop fuse according to claim 3, characterized in that: The first connecting plate (302) is bent relative to the plug rod (301), a bending transition portion (415) is provided between the second connecting plate (412) and the extension plate (411), and the surfaces opposite to the first connecting plate (302) are suitable for fitting.

5. The outdoor high voltage AC jet drop fuse according to claim 4, characterized in that: The first connecting plate (302) is provided with a first serial connection hole (303) passing through the relative surfaces, and the second connecting plate (412) is provided with a second serial connection hole (413) corresponding to the first serial connection hole (303). The connecting member (6) comprises a bolt (601) and a nut (602), and the bolt (601) passes through the first serial connection hole (303) and the second serial connection hole (413) and then cooperates with the nut (602); the first connecting plate (302) is provided with a first mounting hole (304) passing through the relative surfaces, and the second connecting plate (412) is provided with a second mounting hole (414) aligned with the first mounting hole (304).

6. The outdoor high voltage AC jet drop fuse according to claim 5, characterized in that: The hoop (420) is divided into two parts, which are also connected by the connecting piece (6). Each part includes a hoop plate (421). The extension plate (411) is located on the outer surface of one of the hoop plates (421). Both ends of the two hoop plates (421) are provided with ear plates (423). The ear plates (423) are provided with through holes (424). The bolt (601) passes through the two aligned through holes (424) and then cooperates with the nut (602).

7. The outdoor high voltage AC jet drop fuse according to claim 6, characterized in that: An elastic washer (7) sleeved on the bolt (601) is arranged between the nut (602) and the ear plate (423).

8. The outdoor high voltage AC jet drop fuse according to any one of claims 2 to 7, characterized in that: A pressure dividing pad (422) is provided on the inner wall of the clamp (420).

9. The outdoor high voltage AC jet drop fuse according to claim 8, characterized in that: The insulator (2) is made of high-strength ceramic material.

10. The outdoor high voltage AC jet drop fuse according to claim 9, characterized in that: The pressure dividing pad (422) is made of silicone rubber material.

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