CN202196736U - Fuse for solar energy generating device - Google Patents

Abstract

The utility model discloses a fuse used for solar power generation equipment, which comprises a base, a fuse body and a carrying fuse. The fuse link includes a fuse tube, a pair of terminals, several pieces of melt and an arc extinguishing medium. A pair of terminals respectively includes an inner cap and an outer cap, and the inner cap and the outer cap are encased on the end of the melting tube in turn; the end surface of the inner cap is provided with a number of perforations corresponding to the arrangement of several melts and the cross-sectional shape of each melt Several pieces of melt are axially placed in the center of the inner cavity of the melting tube in a side-by-side manner, and the two ends of each piece of melt pass through the perforation of the inner cap and are fixedly connected and electrically contacted with the inner cap by spot welding; The surface of the body is provided with multiple rows of narrow necks at intervals along the length direction, and the width of each row of narrow necks is δ; The lifting ring connected to the lower end surface of the middle part of the dust cover; the fuse is suspended on the fuse carrier laterally and then placed in the base.

Description

A fuse for solar power generation equipment

technical field

The utility model relates to a fuse used for solar power generation equipment.

Background technique

As a protective device for various electronic and electrical equipment, the fuse is a traditional device with mature technology. It has the advantages of simple structure and reliable performance. It is widely used in the protection of various equipment in various industries. Various types of protection for different specific equipment, such as motors, frequency converters, etc. At present, common fuses generally include a fusion tube, several pieces of melt in the fusion tube and terminals at both ends of the fusion tube. The inside of the fusion tube is filled with quartz sand, and each piece of melt is processed with a preset narrow part. (narrow neck), and is equipped with a mounting base according to the requirements of the actual situation. When the fault current passes through the melt, the narrow neck with higher resistance is rapidly heated by the thermal effect of the current, and the local temperature rises rapidly, and finally the melt is fused at the narrow neck to completely break the fault current, thereby protecting the circuit. Other devices are not damaged by the fault current. In the emerging solar photovoltaic power generation technology, the protection of related devices requires fuses with high DC rated voltage, small rated current, and fast breaking action. However, there are not many types of fuses that can meet these requirements at present, and most of them are imported products from abroad, and most of them can only protect short-circuit current, and cannot cut off the fault circuit in time when the system is overloaded.

Contents of the invention

The purpose of this utility model is to overcome the deficiencies of the prior art and provide a fuse for solar power generation equipment, which has stable fusing characteristics, rapid breaking action, and more reliable circuit protection, and is applicable to the highest DC 1000V Rated voltage, 1A to 16A occasions.

The technical solution to achieve the above object is: a fuse for solar power generation equipment, including a base, a fuse body and a fuse carrier, the fuse body includes a fuse tube, a pair of wires respectively connected to both ends of the fuse tube Terminals and several pieces of melt and arc extinguishing medium arranged in the fuse tube, wherein the base includes a fuse containing cavity and two terminal blocks located outside the two ends of the fuse containing cavity and whose lower part communicates with the fuse containing cavity Accommodating cavity, a pair of sockets with a crimping plate on the outer end are installed on the bottom plate of the fuse accommodating cavity, a clamping spring is arranged on each socket, and a terminal block is respectively installed in the two terminal block containing cavities. The two terminal blocks are respectively connected to the crimping plate on the socket inserted into the terminal block through a screw; the pair of terminal blocks respectively include an inner cap and an outer cap, and the inner cap and the outer cap are enclosed in the said socket in turn. The end of the fusion pipe; the end surface of the inner cap is provided with a number of perforations corresponding to the arrangement of the melts and the cross-sectional shape of each melt; the plurality of melts are axially placed in the melt In the center of the inner cavity of the tube, the two ends of each piece of melt pass through the perforation of the inner cap and are fixedly connected and electrically contacted with the inner cap by spot welding; the surface of each piece of melt is arranged at intervals along the length direction Multiple rows of narrow necks, the minimum width of each row of narrow necks is δ; the fuse carrier includes a dust cover, a handle arranged on the upper end surface of the middle part of the dust cover and a pair of The lower end face and the inner diameter of the lifting ring adapted to the outer diameter of the fusion tube; the fuse is suspended laterally on the fuse-carrying part and then placed in the fuse containing cavity of the base and inserted into the socket.

The above-mentioned fuse for solar power generation equipment, wherein, the number of each row of narrow necks on the melt is one, and the one narrow neck is located in two semicircular notches respectively opened on the width edge of the melt between.

In the aforementioned fuse for solar power generation equipment, a liner is further provided between the end surface of the inner cap and the end surface of the outer cap.

Compared with the prior art, the fuse of the utility model for solar power generation equipment has the following characteristics:

1) Specially designed for photovoltaic power generation devices, the protection performance is better than general fuses;

2) The fusing characteristic is stable, the breaking action is fast, and the protection of the circuit is more reliable;

3) Metallurgical effect points are added to the melt, which can realize all-round protection for short circuit and overload;

4) Use No. 95 alumina ceramics as the melting tube to make the appearance of the fuse link more beautiful;

5) Although this fuse is developed for solar photovoltaic power generation components, it can also be used in other circuits whose voltage and current do not exceed the rated value of the fuse, as a general protection device for semiconductor equipment.

Description of drawings

Fig. 1 is the structure schematic diagram of the fuse that is used for solar power generation equipment of the present utility model;

Fig. 2 is a structural schematic diagram of a fuse in a fuse for solar power generation equipment according to the present invention.

Detailed ways

In order to better understand the technical solution of the utility model, the following will be described in detail through specific embodiments in conjunction with the accompanying drawings:

Please refer to FIG. 1 and FIG. 2 , a fuse for solar power generation equipment of the present invention includes a base 1 , a fuse 2 and a fuse 3 .

The base 1 includes a fuse housing chamber 11 and two terminal housing chambers 12, wherein the fuse housing chamber 1 is located in the middle of the base, and the two wire housing chambers 12 are located outside the left and right ends of the fuse housing chamber 11 and at the lower part It communicates with the fuse housing cavity 11; a pair of sockets 14 with a pressure plate 13 at the outer end are installed on the bottom plate of the fuse housing cavity 11, and a clamping spring 15 is arranged on each socket 13; A terminal block 16 is installed respectively, and the two terminal blocks 16 are respectively connected with the crimping plate 13 on the socket 13 inserted in the terminal block 16 through a screw 17 .

The fuse 2 includes a melting tube 21, several pieces of melt 22, an arc extinguishing medium 23, a pair of terminals and two pads 26, wherein several pieces of melt 22 are axially placed inside the melting tube 21 in a side-by-side manner In the center of the cavity, multiple rows of narrow necks 220 are arranged at intervals along the length direction on the surface of each piece of melt 22, the number of each row of narrow necks 220 is one, and the minimum width of the narrow necks 220 is δ, and the narrow necks 220 are located between two They are set between the semicircular gaps on the width edge of the melt 22 respectively; the arc extinguishing medium 23 is filled in the inner cavity of the melting tube 21; a pair of connecting terminals includes an inner cap 24 and an outer cap 25 respectively, and the inner cap 24 and the outer cap 25 Sequentially cover the end of the melting tube 21; the end surface of the inner cap 24 is provided with a number of perforations corresponding to the arrangement of the melts 22 and the cross-sectional shape of each melt 22, so that the two ends of each melt 22 pass through the inner cap. The cap 24 is perforated and fixedly connected and electrically contacted with the inner cap 24 by spot welding; the gasket 26 is arranged between the outer end surface of the inner cap 24 and the inner end surface of the outer cap 25 .

The fuse carrier 3 includes a dustproof cover 31, a handle 32 and a pair of suspension rings 33, wherein the shape of the dustproof cover 31 is adapted to the shape of the fuse containing cavity 11 of the base 1; the handle 31 is arranged on the dustproof The middle upper end surface of the cover 31 ; a pair of suspension rings 33 are connected to the middle lower end surface of the dustproof cover 31 and the inner diameter is adapted to the outer diameter of the melting tube 21 .

The installation method of a fuse used for solar power generation equipment of the present utility model is: the fuse body 2 is horizontally suspended on the fuse carrier 3 and then placed in the fuse body receiving cavity 11 of the base 1, and the fuse body 2 is two The connecting terminal at the end is inserted into the socket 13 , and the dustproof cover 31 covers the opening end of the fuse containing chamber 11 at this time. The fuse body 2 is clamped by the clamping spring 15 to ensure reliable electrical contact, and the wires 4 connected to the external equipment are respectively inserted from the holes at the left and right ends of the base 1 into the bottom of the clamping plate 13 in the terminal block 16 and then screwed by screws 17 Compression to ensure reliable mechanical fixation and electrical contact.

In order to ensure that the fuse body 2 can quickly respond to the fault current in the fuse for solar power generation equipment of the present utility model, the melt 22 is made of pure silver with a content of 99.9% as a material, and several narrow necks 220 are made on it. Metallurgical effect point for overload protection. In addition, the melting tube is made of No. 95 alumina ceramics, which not only has good high temperature resistance, corrosion resistance and insulation performance, but also has a beautiful appearance.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above-mentioned The changes and modifications of the embodiments will all fall within the scope of the claims of the present utility model.

Claims (3)

1. fuse that is used for solar power plant; Comprise a base, a fuse-link and a fusing carrier; Said fuse-link comprises fusion tube, a pair of binding post and some melt and arc-extinguishing mediums that are located in the fusion tube that are connected to the fusion tube two ends, it is characterized in that

Said base comprises the junction block container cavity that a fuse-link container cavity and two are positioned at outside the two ends of fuse-link container cavity and the bottom is communicated with the fuse-link container cavity; The socket that a pair of outer end has tension disc is installed on the base plate of said fuse-link container cavity; Configuration one clamps spring on each socket; In said two junction block container cavities a junction block is installed respectively, the tension disc that these two junction blocks pass through respectively on the said socket in a screw and the insertion junction block is connected;

Cap and outer cap in said pair of terminals comprises respectively, said in cap and outer cap successively big envelope in the termination of said fusion tube; The arrangement mode of corresponding some melts and the cross sectional shape of every melt are offered some perforation on the end face of said interior cap;

Said some melts with side by side mode axially place the inner chamber central authorities of said fusion tube, two of every melt pass said in cap perforation and be fixedly connected with said interior cap and electrically contact through spot welding;

On the surface of said every melt along its length the compartment of terrain the narrow neck of multiple row is set, each minimum widith that is listed as narrow neck is δ;

Said fusing carrier comprises that a dust cap, is located at the handle and a pair of lower surface, middle part of dust cap and the adaptive suspension ring of external diameter of internal diameter and said fusion tube of being connected of the upper surface, middle part of dust cap;

Said fuse-link is placed in the fuse-link container cavity of said base on said fusing carrier and is inserted on the said socket by lateral suspension.

2. the fuse that is used for solar power plant according to claim 1; It is characterized in that; The quantity that on the said melt each is listed as on the narrow neck is one, and this narrow neck is between the semi arch breach of two widthwise edges that are opened in said melt respectively.

3. the fuse that is used for solar power plant according to claim 1 is characterized in that, also is provided with a liner between the end face of said interior cap and the end face of outer cap.

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