CN214384854U

CN214384854U - Lightning protection surge protector

Info

Publication number: CN214384854U
Application number: CN202022379733.4U
Authority: CN
Inventors: 陈正茂; 张传荣; 赵成雷
Original assignee: Guangdong Qiujing Electrical
Current assignee: Guangdong Qiujing Electrical
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-10-12
Anticipated expiration: 2030-10-22

Abstract

The utility model provides a lightning protection surge protector, including insulating casing, first electrode, the second electrode, piezo-resistor, the thermal link, first connecting plate and second connecting plate, insulating casing is equipped with the inner chamber, the one end of first electrode and the one end of second electrode all are located the inner chamber, piezo-resistor's one end is connected with the one end electricity of second electrode, the other end is just to the one end of first electrode, insulating casing's lateral wall is equipped with the opening, first connecting plate fixed mounting is between the one end and the opening of first electrode, second connecting plate fixed mounting is between piezo-resistor's the other end and opening, all be equipped with the slide on the opposite face of first connecting plate and second connecting plate and slide into and the joint with the heat supply fuse-link between piezo-resistor and first electrode. The utility model discloses can solve current lightning protection surge protector and adopt mechanical type hot trip gear and the problem that can't the dropout appears easily of existence, its simple structure, the installation of being convenient for is maintained.

Description

Lightning protection surge protector

Technical Field

The utility model relates to a lightning protection technical field particularly, relates to a lightning protection surge protector.

Background

The surge protector against lightning, also called lightning protector, is an electronic device for providing safety protection for various electronic equipment, instruments and meters and communication lines, is suitable for power supply systems with alternating current of 50/60HZ and rated voltage of 220V/380V, protects the impacts of indirect lightning and direct lightning or surges of other instantaneous overvoltage, and is suitable for surge protection requirements in household residences, third industry and industrial fields. When spike current or voltage is suddenly generated in an electric loop or a communication line due to external interference, the lightning protection surge protector can be conducted and shunted within a very short time, so that damage of surge to other equipment in the loop is avoided.

Most of the existing surge protectors adopt a mechanical thermal trip device, one end of a spring is welded and fixed with a piezoresistor in the surge protector through low temperature (100-120 ℃) and is always in a tensioned or compressed state. When the surge protector generates heat due to degradation, the tripping temperature (100℃) is reached

When the temperature is 120 ℃ below zero, the spring is separated from the fixed state, the piezoresistor is disconnected with the circuit, and the anti-surge protector is broken to protect the electronic equipment. However, because the surge protector is under tension or compression for a long time, the surge protector spring is very easy to lose efficacy, and the problem that the surge protector cannot be released easily occurs, and the structure of the surge protector spring needs to be improved.

SUMMERY OF THE UTILITY MODEL

Based on this, adopt the problem of the unable dropout of easy appearance that mechanical type thermal tripping device and exist in order to solve current surge protector, the utility model provides a lightning protection surge protector, its concrete technical scheme as follows:

the utility model provides a lightning protection surge protector, includes insulating casing, first electrode, second electrode, piezo-resistor, thermal link, first connecting plate and second connecting plate, insulating casing is equipped with the inner chamber, the one end of first electrode and the one end of second electrode all is located in the inner chamber, piezo-resistor's one end with the one end electricity of second electrode is connected, piezo-resistor's the other end is just right the one end of first electrode, insulating casing's lateral wall is equipped with the opening, first connecting plate with the second connecting plate is parallel to each other, first connecting plate fixed mounting be in the one end of first electrode with between the opening, second connecting plate fixed mounting be in piezo-resistor's the other end with between the opening, first connecting plate and all be equipped with the slide on the opposite face of second connecting plate and supply the thermal link follows the opening slides in and the joint is in piezo-resistor's the other end with first electricity Between one end of the pole.

When the lightning protection surge protector leads to its temperature to exceed withstand temperature because of part degradation or because of piezo-resistor self trouble, the thermal link melts, piezo-resistor with lose between the first electrode and be connected, the lightning protection surge protector open circuit to protect the electron device who is connected with the lightning protection surge protector. Above-mentioned lightning protection surge protector adopts the hot fuse-link to replace traditional mechanical type thermal tripping device, and it not only can solve current surge protector and adopts mechanical type thermal tripping device and the easy unable problem of threading off that appears that exists, still has simple structure, the characteristics of being convenient for installation and maintenance.

Furthermore, one end of the first electrode is provided with a notch matched with the thermal fuse link.

Further, lightning protection surge protector still includes sheetmetal and coil spring, the sheetmetal slope set up just the one end of sheetmetal with the breach is close to the lateral wall fixed connection of first connecting plate, the other end orientation of sheetmetal the breach is kept away from the lateral wall of first connecting plate, coil spring installs the other end of sheetmetal with the breach is close to between the lateral wall of first connecting plate.

Furthermore, the lightning protection surge protector also comprises a display lamp, wherein the display lamp is fixedly arranged on the outer side wall of the insulating shell and is connected with the piezoresistor in parallel through a wire.

Furthermore, the surface of the other end of the metal sheet close to the piezoresistor is provided with hemispherical bulges.

Furthermore, one end of the first electrode penetrates through the side wall of the inner cavity and is located on the outer side of the insulating shell, and the distance between the slide way on the first connecting plate and the slide way on the second connecting plate is equal to the length of the thermal fuse link.

Further, one end of the second electrode penetrates through the side wall of the inner cavity and is located on the outer side of the insulating shell.

Further, the thermal fuse is made of a low melting point alloy.

Further, the insulating housing is made of an insulating ceramic material.

Further, the first connecting plate and the second connecting plate are both made of an insulating ceramic material.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

Fig. 1 is a schematic view of an overall structure of a lightning surge protector according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a connecting plate of a lightning surge protector according to an embodiment of the present invention;

fig. 3 is a side view of an insulating housing of a lightning surge protector according to an embodiment of the present invention;

fig. 4 is a schematic view of an overall structure of a lightning surge protector according to an embodiment of the present invention;

fig. 5 is a schematic view of a structural relationship among a gap, a metal sheet and a coil spring of a lightning surge protector according to an embodiment of the present invention;

fig. 6 is a schematic view of an overall structure of a lightning surge protector according to an embodiment of the present invention.

Description of reference numerals:

1. an insulating housing; 2. a first electrode; 3. a second electrode; 4. a voltage dependent resistor; 5. a thermal fuse; 6. a first connecting plate; 7. a second connecting plate; 8. an inner cavity; 9. a notch; 10. a metal sheet; 11. a coil spring; 12. a slideway; 13. an opening; 14. and a display lamp.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.

As shown in fig. 1, fig. 2 and fig. 3, a lightning protection surge protector in an embodiment of the present invention includes an insulating housing 1, a first electrode 2, a second electrode 3, a varistor 4, a thermal fuse 5, a first connecting plate 6 and a second connecting plate 7, wherein the insulating housing 1 is provided with an inner cavity 8, one end of the first electrode 2 and one end of the second electrode 3 are both located in the inner cavity 8, one end of the varistor 4 is electrically connected to one end of the second electrode 3, the other end of the varistor 4 is opposite to one end of the first electrode 2, a side wall of the insulating housing 1 is provided with an opening 13, the first connecting plate 6 and the second connecting plate 7 are parallel to each other, the first connecting plate 6 is fixedly installed between one end of the first electrode 2 and the opening 13, the second connecting plate 7 is fixedly installed between the other end of the varistor 4 and the opening 13, the opposite surfaces of the first connecting plate 6 and the second connecting plate 7 are provided with slideways 12 for the thermal fuse link 5 to slide in from the opening 13 and be clamped between the other end of the piezoresistor 4 and one end of the first electrode 2. The other end of the first electrode 2 is electrically connected with a power live wire, and the other end of the second electrode 3 is grounded.

When the lightning protection surge protector leads to its temperature to exceed withstand temperature because of part degradation or because of piezo-resistor 4 self trouble, thermal link 5 melts, piezo-resistor 4 with lose between the first electrode 2 and be connected, the lightning protection surge protector open circuit to protect the electron device who is connected with lightning protection surge protector. Above-mentioned lightning protection surge protector adopts hot fuse-link 5 to replace traditional mechanical type hot trip gear, and it not only can solve current surge protector and adopts mechanical type hot trip gear and the easy unable dropout's that appears problem that exists, still has simple structure, the characteristics of being convenient for installation maintenance.

Through setting up opening 13, first connecting plate 6 and second connecting plate 7, and set up slide 12 on first connecting plate 6 and the second connecting plate 7, after hot fuse-link 5 melts, can install new hot fuse-link 5 very conveniently first electrode 2's one end with between the other end of piezo-resistor 4 to improve whole lightning protection device's utilization efficiency.

In one embodiment, the distance between the slide 12 on the first connecting plate 6 and the slide 12 on the second connecting plate 7 is equal to the length of the thermal fuse 5, the height of the opening 13 is equal to or greater than the length of the thermal fuse 5, and the planes of the slide 12 on the first connecting plate 6 and the slide 12 on the second connecting plate 7 are on the same horizontal plane as the end surface of one end of the first electrode 2 and the end surface of the other end of the varistor 4, respectively.

In one embodiment, as shown in fig. 4 and 5, a notch 9 matched with the thermal fuse link 5 is disposed at one end of the first electrode 2, the lightning protection surge protector further includes a metal sheet 10 and a coil spring 11, the metal sheet 10 is disposed in an inclined manner, one end of the metal sheet 10 is fixedly connected to the side wall of the notch 9 close to the first connecting plate 6, the other end of the metal sheet 10 faces the side wall of the notch 9 far away from the first connecting plate 6, and the coil spring 11 is mounted between the other end of the metal sheet 10 and the side wall of the notch 9 close to the first connecting plate 6. One end of the thermal fuse link 5 is clamped in the notch 9 through the metal sheet 10 and the spiral spring 11, and the other end of the thermal fuse link 5 is clamped at the other end of the piezoresistor 4.

When the thermal fuse link 5 is clamped between the notch 9 and the other end of the piezoresistor 4, the coil spring 11 is in a compressed state. In this way, the thermal fuse 5 can be fixed between the one end of the first electrode 2 and the other end of the varistor 4 more favorably by the metal piece 10 and the coil spring 11.

In one embodiment, a hemispherical protrusion is further disposed on the surface of the other end of the metal sheet 10 close to the varistor 4, so as to increase the contact area between the metal sheet 10 and the thermal fuse link 5.

In one embodiment, as shown in fig. 6, the lightning protection surge protector further comprises a display lamp 14, the display lamp 14 is fixedly installed on the outer side wall of the insulating housing 1, and the display lamp 14 is connected in parallel with the varistor 4 through a wire. When the lightning surge protector works normally, the display lamp 14 is lighted. When the lightning surge protector is turned off, the display lamp 14 is turned off. Therefore, the display lamp 14 can help technicians to judge the on-off state of the lightning protection surge protector, so that the routine inspection and maintenance are facilitated.

In one embodiment, one end of the first electrode 2 passes through the sidewall of the inner cavity 8 and is located outside the insulating housing 1, and one end of the second electrode 3 passes through the sidewall of the inner cavity 8 and is located outside the insulating housing 1, so as to facilitate the connection between the live power line and the first electrode 2, and between the ground line and the second electrode 3.

In one embodiment, the thermal fuse link 5 is made of a low melting point alloy with a nominal operating temperature of between 70 degrees celsius and 240 degrees celsius. Preferably, said thermal fuse link 5 is of the RF type.

In one embodiment, the insulating housing 1, the first connecting plate 6 and the second connecting plate 7 are made of insulating ceramic material. Therefore, the insulation performance and the safety performance of the lightning protection surge protector can be enhanced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a lightning protection surge protector, includes insulating casing, first electrode, second electrode and piezo-resistor, insulating casing is equipped with the inner chamber, the one end of first electrode and the one end of second electrode all is located in the inner chamber, piezo-resistor's one end with the one end electricity of second electrode is connected, piezo-resistor's the other end is just right the one end of first electrode, a serial communication port, lightning protection surge protector still includes thermal fuse, first connecting plate and second connecting plate, insulating casing's lateral wall is equipped with the opening, first connecting plate with the second connecting plate is parallel to each other, first connecting plate fixed mounting be in the one end of first electrode with between the opening, second connecting plate fixed mounting be in piezo-resistor's the other end with between the opening, first connecting plate and all be equipped with the slide on the opposite face of second connecting plate and supply thermal fuse follows the opening slides And the other end of the piezoresistor is clamped between the other end of the piezoresistor and one end of the first electrode.

2. The lightning surge protector of claim 1, wherein said first electrode has a notch at one end that mates with said thermal fuse link.

3. The lightning protection surge protector according to claim 2, further comprising a metal sheet and a coil spring, wherein the metal sheet is disposed obliquely, one end of the metal sheet is fixedly connected to the side wall of the notch close to the first connecting plate, the other end of the metal sheet faces the notch and is away from the side wall of the first connecting plate, and the coil spring is installed between the other end of the metal sheet and the side wall of the notch close to the first connecting plate.

4. The lightning surge protector according to claim 3, further comprising a display lamp fixedly mounted on an outer side wall of the insulating housing, wherein the display lamp is connected in parallel with the varistor by a wire.

5. The surge protector according to claim 4, wherein the other end of said metal sheet has hemispherical protrusions on the surface thereof adjacent to said varistor.

6. The lightning surge protector of claim 5, wherein the distance between the runners on the first connector plate and the runners on the second connector plate is equal to the length of the thermal fuse link.

7. The lightning surge protector according to claim 6, wherein an end of said first electrode passes through a sidewall of said interior cavity and is located outside said insulating housing, and an end of said second electrode passes through a sidewall of said interior cavity and is located outside said insulating housing.

8. The lightning surge protector of claim 7, wherein said thermal fuse is made of a low melting point alloy.

9. A lightning surge protector according to claim 8, wherein said insulating housing is made of an insulating ceramic material.

10. The lightning surge protector of claim 9, wherein said first connecting plate and said second connecting plate are made of an insulating ceramic material.