Mounting and fixing device for preventing looseness of fuse for protecting voltage transformer

Abstract

The utility model relates to the technical field of fuses, in particular to an anti-loosening mounting and fixing device for a fuse for protecting a voltage transformer, which comprises a base and connecting rings arranged on two sides of the base, two ends of the fuse are clamped in the connecting rings, and the fixing device is detachably connected onto the base. The fixing device comprises an upper connecting seat and a lower connecting seat, an annular empty groove is defined between the upper connecting seat and the lower connecting seat, the lower connecting seat and the base are detachably connected, the upper connecting seat and the lower connecting seat are detachably connected, the fuse extends into the annular empty groove, and the fixing device is arranged in the middle of the fuse. The fixing device has an auxiliary supporting effect on the connecting rings on the two sides, original two supporting points for the fuse are increased to be three supporting points, normal operation of the voltage transformer is not affected, fixation of the fuse can be enhanced, and the phenomenon that the fuse cannot be damaged in the operation process of state adjustment of the voltage transformer is avoided. And the fuse falls off or is thrown away.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fuse, especially relates to a fuse anti-loosening mounting and fixing device for voltage transformer protection. BACKGROUND

[0002] A voltage transformer is a kind of transformer, usually composed of a core, a primary winding (high voltage side) and a secondary winding (low voltage side). It is used to convert high voltage into low voltage, and the secondary low voltage is usually 100V or lower, in order to facilitate measurement and protection circuit, such as providing voltage signal for voltmeter, power meter, providing voltage signal for voltage protection, under-voltage protection. In addition, the voltage transformer also has the function of electrical isolation, which can protect the measurement and protection equipment from high voltage. Therefore, the voltage transformer is very important in the power system, which ensures the safe, reliable and effective operation of the power system.

[0003] In order to further protect the voltage transformer from overload or short circuit, a special high-voltage fuse is usually equipped. These fuses are suitable for rated voltage of 3.6 to 40.5 kilovolts, rated current of up to 6.3 amperes, and frequency of 50 hertz in alternating current power system. The fuse is composed of two different resistivity wires, which are sealed in a fuse tube together with high-purity quartz sand treated by chemical process. The fuse tube is made of high-temperature-resistant aluminum oxide porcelain. When the power line fails, the wire in the fuse will melt, and the arc produced will be quickly extinguished by the quartz sand, thereby cutting off the circuit and ensuring the safety of the voltage transformer and other circuit components.

[0004] The common existing fuse installation method is mostly straight insertion structure. The two ends of the fuse are directly inserted into the metal limiting piece (connecting ring) on the voltage transformer base, and the metal limiting piece prevents the fuse from falling out of the two ends. This installation method usually has the advantages of simple structure and convenient maintenance. However, this installation method also has the disadvantage that the fuse is easy to fall off.

[0005] The connecting ring of the straight insertion fuse is usually made of copper material, which is relatively soft and has limited load capacity. In addition, the fuse is usually filled with quartz sand, and the shell is made of aluminum oxide porcelain, both of which have high density and heavy overall weight. During the operation of voltage transformer state adjustment, if the holding force of the connecting ring is insufficient, the fuse may fall off or even be thrown. This situation not only hinders the normal operation of the voltage transformer, but also may cause serious power safety accidents. The connecting ring and other accessories are prone to deformation after long-term use and multiple operations, which increases the equipment failure rate and increases the cost of equipment maintenance. SUMMARY

[0006] In view of the technical problems in the background art, the utility model discloses a kind of installation fixing device for preventing loosening of fuse for voltage transformer protection, increase a reliable fixing device, on the basis of retaining convenient installation, replacing fuse, reliably limit the displacement that fuse can occur.

[0007] To achieve the above object, the utility model provides a technical scheme:

[0008] A kind of installation fixing device for preventing loosening of fuse for voltage transformer protection, including base and the connecting ring being arranged in the both sides of base, the both ends of fuse are connected in connecting ring, fixing device is detachably connected in base, the fixing device includes upper connecting seat and lower connecting seat, annular air slot is enclosed between the upper connecting seat and lower connecting seat, the lower connecting seat and base are detachably connected, the upper connecting seat and lower connecting seat are detachably connected, the fuse is inserted into annular air slot, and the fixing device is arranged in the middle part of fuse.

[0009] Preferably, a plurality of support holes are provided on the base, a plurality of threaded holes I are provided on the lower connecting seat, the support holes and the threaded holes I are aligned, and a bolt I is provided between the support holes and the threaded holes I.

[0010] Preferably, threaded holes II are provided on the both sides of the lower connecting seat, threaded holes III are provided on the both sides of the upper connecting seat, the threaded holes II and the threaded holes III are aligned, and a bolt II is provided between the threaded holes II and the threaded holes III.

[0011] Preferably, an elastic baffle is provided between the upper connecting seat and the lower connecting seat, and the bolt II penetrates the elastic baffle.

[0012] Preferably, a connecting groove is provided at the upper end of the upper connecting seat, a clamping plate is provided in the connecting groove, a gasket is provided at the lower end of the clamping plate, the clamping plate is inserted into the connecting groove, the clamping plate closes the connecting groove, and the gasket is inserted into the annular air slot and abuts against the fuse.

[0013] Preferably, threaded holes IV are provided on the upper connecting seat, threaded holes V are provided on the clamping plate, the threaded holes IV and the threaded holes V are aligned, and a bolt III is provided between the threaded holes IV and the threaded holes V.

[0014] Preferably, a limiting hole is provided at one end of the bolt II, and a limiting rod is detachably provided in the limiting hole.

[0015] The utility model has the following advantages and beneficial effects:

[0016] The fixing device plays an auxiliary supporting role on the connecting rings on both sides, increases the two supporting points on the fuse to three supporting points, does not affect the normal operation of the voltage transformer, and can further fix the fuse, so that the fuse is prevented from falling off or being thrown away during the operation process of the voltage transformer state adjustment.

[0017] The whole structure is connected in a detachable mode, is convenient to install on the existing straight insertion structure, is convenient to disassemble, the whole structure is simple, and operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a front view of a fuse anti-loosening mounting and fixing device for voltage transformer protection provided by the utility model;

[0019] Figure 2 is a top view of a fuse anti-loosening mounting and fixing device for voltage transformer protection provided by the utility model;

[0020] Figure 3 is Figure 1 a sectional view of the drawing;

[0021] Figure 4 is a fixing device and base connection schematic view of a fuse anti-loosening mounting and fixing device for voltage transformer protection provided by the utility model;

[0022] Figure 5 is Figure 1 a local enlarged view;

[0023] Figure mark: 1-base, 101-connecting ring, 102-supporting hole, 2-fuse, 3-fixing device, 4-lower connecting seat, 41-threaded hole I, 42-threaded hole II, 43-bolt I, 44-bolt II, 441-limiting hole, 442-limiting rod, 5-elastic baffle, 6-upper connecting seat, 61-threaded hole III, 62-threaded hole IV, 7-connecting groove, 8-clamping plate, 81-threaded hole V, 82-gasket, 9-bolt III, A-ring-shaped air slot. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Example

[0027] like Figures 1-4 As shown, a mounting and fixing device for preventing loosening of a fuse used for voltage transformer protection includes a base 1 and connecting rings 101 disposed on both sides of the base 1. The two ends of the fuse 2 are snapped into the connecting rings 101. A fixing device 3 is detachably connected to the base 1. The fixing device 3 includes an upper connecting seat 6 and a lower connecting seat 4. An annular groove A is formed between the upper connecting seat 6 and the lower connecting seat 4. The lower connecting seat 4 is detachably connected to the base 1, and the upper connecting seat 6 and the lower connecting seat 4 are detachably connected. The fuse 2 extends into the annular groove A, and the fixing device 3 is disposed in the middle of the fuse 2.

[0028] like Figures 1-4 As shown, the base 1 is provided with several support holes 102, and the lower connecting seat 4 is provided with several threaded holes I41. The support holes 102 and the threaded holes I41 are aligned, and bolts I43 are provided between the support holes 102 and the threaded holes I41. The bolts I43 fix the lower connecting seat 4 and the base 1. The support holes 102 can be drilled directly on the existing direct insertion structure without replacing the original direct insertion structure, which greatly reduces the production cost and avoids the waste of existing resources.

[0029] like Figures 1-4 As shown, threaded holes II42 are provided on both sides of the lower connecting seat 4, and threaded holes III61 are provided on both sides of the upper connecting seat 6. Threaded holes II42 and III61 are aligned, and bolts II44 are provided between threaded holes II42 and III61. The upper connecting seat 6 and the lower connecting seat 4 are connected in a detachable manner. When installing the fuse 2, the fuse 2 is placed directly on the lower connecting seat 4, and then the upper connecting seat 6 is placed on the lower connecting seat 4. Bolts II44 are screwed in to fix the upper connecting seat 6 and the lower connecting seat 4.

[0030] like Figure 1 , 3 As shown in Figure 4, an elastic baffle 5 is provided between the upper connecting seat 6 and the lower connecting seat 4. Bolt II 44 passes through the elastic baffle 5. The elastic baffle 5 is made of elastic materials such as rubber. While ensuring insulation, it avoids strong friction between the upper connecting seat 6 and the lower connecting seat 4 during the operation of the voltage transformer, protects the overall structure of the fixing device 3, and increases the service life of the fixing device 3.

[0031] likeFigure 2 、 3 , as shown in Figure 4, the upper end of the upper connecting seat 6 is provided with a connecting groove 7, the connecting groove 7 is provided with a clamping plate 8, the lower end of the clamping plate 8 is provided with a gasket 82, the gasket 82 is fixedly pasted on the lower end of the clamping plate 8 in a gluey manner, the clamping plate 8 extends into the connecting groove 7, the clamping plate 8 closes the connecting groove 7, the gasket 82 extends into the annular air slot A and abuts against the fuse 2, the gasket 82 is also made of rubber or other insulating and elastic materials, the gasket 82 contacts the fuse 2, can increase the static friction force of the contact surface, further fixes the fuse 2 in the annular air slot A, and prevents the fuse 2 from sliding out.

[0032] As shown in Figure Figure 2 、 3 , as shown in Figure 4, the upper connecting seat 6 is provided with a threaded hole IV 62, the clamping plate 8 is provided with a threaded hole V 81, the threaded hole IV 62 and the threaded hole V 81 are aligned, and the threaded hole IV 62 and the threaded hole V 81 are provided with a bolt III 9, when the fixing device 3 is used for a period of time, the gasket 82 continuously rubs against the fuse 2, the gasket 82 is worn, the clamping plate 8 and the connecting groove 7 adopt a detachable connection mode, the clamping plate 8 can be removed, the worn gasket 82 is removed, and a new gasket 82 is installed in the connecting groove 7.

[0033] As shown in Figure Figure 1 、 3 , as shown in Figure 5, one end of the bolt II 44 is provided with a limiting hole 441, the limiting hole 441 is detachably provided with a limiting rod 442, the bolt II 44 is matched with a corresponding nut, the bolt II 44 and the nut are rotated in the process of operation of the voltage transformer, the limiting rod 442 extends into the limiting hole 441, and the nut can be prevented from falling off from the bolt II 44, and the connection stability of the overall structure is greatly protected.

[0034] The preferred embodiments of the utility model are merely used for the utility model, and the utility model can be changed and varied for the person skilled in the art, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A loose-fixing-preventing mounting and fixing device for a voltage transformer protection fuse, comprising a base and connecting rings arranged on both sides of the base, both ends of the fuse being clamped in the connecting rings, characterized in that, The fixing device is detachably connected to the base. The fixing device includes an upper connecting seat and a lower connecting seat. An annular groove is formed between the upper connecting seat and the lower connecting seat. The lower connecting seat is detachably connected to the base. The upper connecting seat and the lower connecting seat are detachably connected. The fuse extends into the annular groove. The fixing device is located in the middle of the fuse.

2. The anti-loosening installation and fixing device for a voltage transformer protection fuse according to claim 1, characterized in that, The base is provided with a plurality of support holes, and the lower connecting seat is provided with a plurality of threaded holes I. The support holes and the threaded holes I are aligned, and bolts I are provided between the support holes and the threaded holes I.

3. The anti-loosening installation and fixing device for a voltage transformer protection fuse according to claim 1, characterized in that, The lower connecting seat has threaded holes II on both sides, and the upper connecting seat has threaded holes III on both sides. The threaded holes II and III are aligned, and bolts II are provided between the threaded holes II and III.

4. The anti-loosening installation and fixing device for a voltage transformer protection fuse according to claim 3, characterized in that, An elastic baffle is provided between the upper connecting seat and the lower connecting seat, and the bolt II passes through the elastic baffle.

5. The installation and fixing device for preventing loosening of a fuse for voltage transformer protection according to claim 1, characterized in that, The upper end of the upper connector is provided with a connecting groove, a retaining plate is provided in the connecting groove, and a gasket is provided at the lower end of the retaining plate. The retaining plate extends into the connecting groove and closes the connecting groove. The gasket extends into the annular hollow groove and abuts against the fuse.

6. The installation and fixing device for preventing loosening of a fuse for voltage transformer protection according to claim 5, characterized in that, The upper connecting seat is provided with a threaded hole IV, and the clamping plate is provided with a threaded hole V. The threaded hole IV and the threaded hole V are aligned, and a bolt III is provided between the threaded hole IV and the threaded hole V.

7. The installation and fixing device for preventing loosening of a fuse for voltage transformer protection according to claim 3, characterized in that, One end of the bolt II is provided with a limiting hole, and a limiting rod is detachably provided in the limiting hole.

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