CN202949438U - Network access device - Google Patents
Network access device Download PDFInfo
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- CN202949438U CN202949438U CN 201220545288 CN201220545288U CN202949438U CN 202949438 U CN202949438 U CN 202949438U CN 201220545288 CN201220545288 CN 201220545288 CN 201220545288 U CN201220545288 U CN 201220545288U CN 202949438 U CN202949438 U CN 202949438U
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- gas discharge
- discharge tube
- protection circuit
- lightning protection
- access device
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- 230000008054 signal transmission Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to the field of communication lightning protection, in particular to a network access device which comprises an exchanger. The network access device is characterized in that a power source lightning protection circuit and a signal lightning protection circuit are installed in an exchanger body, the power source lightning protection circuit comprises a gas discharge tube and three groups of high-voltage overcurrent protection modules formed by series connection of voltage-sensitive resistors and thermal fuses. One end of a first group of high-voltage overcurrent protection module is connected with a fire wire, the other end of the first group of high-voltage overcurrent protection module is connected with the gas discharge tube, one end of a second group of high-voltage overcurrent protection module is connected with a zero line, the other end of the second group of high-voltage overcurrent protection module is connected with the gas discharge tube, two ends of a third group of high-voltage overcurrent protection module are connected with the zero line and the fire wire, and the gas discharge tube is connected with a ground wire. The signal lightning protection circuit comprises a gas discharge tube and an electronic amplitude limiting module, the gas discharge tube and the electronic amplitude limiting module are respectively connected between two signal lines of network data lines, and the electronic amplitude limiting module is connected with the ground wire.
Description
Technical field
The utility model relates to the telecommunication equipment lightning protection field, is specifically related to a kind of network access device.
Background technology
Shocking preventing technology is divided into direct lightning protection and induction lightening protection two large categories, responds to the probability of the damage that thunder causes present microelectronic device far away higher than direct stroke.Network ' s thunder belongs to induction lightning protection category; in direct lightning strike is released process; as long as there is the place of circuit all can form the transient voltage pulse; thereby to the equipment formation damage at circuit two ends, so the network signal lightning protection device protection has directivity; the lightning current of sensing on netting twine road direction along the line two ends are impacted; so need network two ends to set all to need to do lightning protection to process, otherwise head and the tail can not take into account, not have due lightning protection effect.
Network signal lightning protection device need to network signal transmission rate coupling, transmission rate is divided into two kinds of 100,000,000 (lOOMbps) and gigabits (lOOOMbps) usually, the kilomega network transfer of data has particularity, should describe with some special parameters; Decay, far and near end are crosstalked, far and near end return loss, decay are crosstalked ratio, the power total value of crosstalking is to weigh the important parameter of gigabit networking performance, must reach simultaneously requirement, have one defective, should be considered as the network ' s thunder device defective.It is not just can weigh with Insertion Loss, one or two data of transmission rate.Therefore, the gigabit networking lightning protection device must possess the requirement of network performance, otherwise it will be inapplicable.
in prior art in order to reach higher through-current capacity and to obtain lower residual voltage level, the network ' s thunder device adopts multistage lightning protection components and parts combination mostly at present, adopt the energy coordination device to carry out decoupling in the middle of multistage lightning protection components and parts, guarantee that rear class equipment is not damaged by powerful lightning current or overvoltage, but the lightning protection device of this multistage lightning protection component combination is because the energy coordination device is series in major loop, present larger impedance, again because the rear class lightning protection component presents larger electric capacity in high frequency, thereby cause when causing being linked into the series connection of network ' s thunder device in main circuit that insertion loss increases, signal attenuation, affect Internet Transmission.
The utility model content
The purpose of this utility model is to provide a kind of network access device, has solved lightning protection device of the prior art and has had larger impedance, easily affects signal stabilization, causes that insertion loss increases, signal attenuation, affects the problem of Internet Transmission.
For solving above-mentioned technical problem, the utility model by the following technical solutions: a kind of network access device, comprise switch, power lightning protection circuit and signal lighting protection circuit are installed in the switch body,
Described power lightning protection circuit comprises gas discharge tube and three groups of high-pressure and overflowing protection modules that are cascaded and consisted of by piezo-resistance, Thermal Cutoffs, first group of one end of described high-pressure and overflowing protection module is connected with live wire, the other end is connected with gas discharge tube, second group of one end of described high-pressure and overflowing protected location is connected with zero line, the other end is connected with gas discharge tube, the 3rd group of two ends of described high-pressure and overflowing protected location connect respectively zero line and live wire, and described gas discharge tube is connected with earth connection;
Described signal lighting protection circuit comprises gas discharge tube and electronics amplitude limit module, and described gas discharge tube and electronics amplitude limit module are connected between two signal line in the network data line, and described electronics amplitude limit module is connected with earth connection.
For making the utility model play better technique effect:
Further technical scheme is that above-mentioned electronics amplitude limit module comprises bridge rectifier, transient voltage suppressor diode and two ground connection diodes, the input of described bridge rectifier connects respectively two signal line, output termination transient voltage suppressor diode two ends, in described two ground connection diodes: the output of a ground connection diode is connected with earth connection, input is connected with the output of bridge rectifier, the input of another ground connection diode is connected with earth connection, and output is connected with the output of bridge rectifier.
Further technical scheme is that above-mentioned network data line has 8.
Further technical scheme is that above-mentioned switch body fuselage is provided with the whether normal warning light of display power supply lightning protection circuit, be provided with louvre, be provided with the network port and the USB socket that are connected with signal lighting protection circuit, be provided with and power lightning protection circuit power input socket and power output socket, be provided with the earth jack that is connected with earth connection.
Compared with prior art, the beneficial effects of the utility model are:
One, the utility model without the energy adapter of traditional network ' s thunder device, has reduced the impedance of circuit, can use network ' s thunder device insertion loss to be reduced to and meet the requirements of the standard, and makes network transmission performance more superior;
Two, be provided with gas discharge tube and electronics amplitude limit module between the network data line; use lightning protection circuit electric capacity to be reduced to minimum; reduce lightning protection circuit to the interference of signal transmission, wherein the diode circuit residual voltage reduces, and effectively protecting network equipment can work under thunder and lightning and overpressure situation.
Description of drawings
Fig. 1 is the power lightning protection circuit connection diagram of an embodiment of this novel a kind of network access device.
Fig. 2 is the signal lighting protection circuit connection layout of an embodiment of the novel a kind of network access device of the basis shown in Fig. 1.
Fig. 3 is the body rearview of this novel a kind of another embodiment of network access device.
Fig. 4 is the body front view of novel a kind of another embodiment of network access device of the basis shown in Fig. 3.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Fig. 1 and Fig. 2 show an embodiment of a kind of network access device of the utility model: a kind of network access device, comprise switch, and power lightning protection circuit and signal lighting protection circuit are installed in the switch body,
described power lightning protection circuit comprises that gas discharge tube and three groups are by piezo-resistance, the high-pressure and overflowing protection module that Thermal Cutoffs is cascaded and consists of, first group of one end of described high-pressure and overflowing protection module is connected with live wire, the other end is connected with gas discharge tube, second group of one end of described high-pressure and overflowing protected location is connected with zero line, the other end is connected with gas discharge tube, the 3rd group of two ends of described high-pressure and overflowing protected location connect respectively zero line and live wire, described gas discharge tube is connected with earth connection, piezo-resistance wherein, adopt the chip varistor outfit low temperature fuse of function admirable to form through embedding is special, the fusing-off temperature of Thermal Cutoffs is 115 degree, it is 10A that the maximum of this Thermal Cutoffs is born electric current, when electric current surpasses 10A, so this Thermal Cutoffs possesses overcurrent, overheated defencive function.After piezo-resistance was aging, Thermal Cutoffs can disconnect piezo-resistance within the very first time from power circuit, and piezo-resistance adopts the mode of embedding, thus pressure-sensitive do not have in ageing process smolder, the phenomenon such as blast occurs;
Described signal lighting protection circuit comprises gas discharge tube and electronics amplitude limit module, and described gas discharge tube and electronics amplitude limit module are connected between two signal line in the network data line, and described electronics amplitude limit module is connected with earth connection.
According to a preferred embodiment of a kind of network access device of the utility model, the length of earth connection is less than 4cm, and is enough low with the residual voltage that guarantees lightning protection unit, to the protection of equipment The Gift of Being the Best You Can Be.
another embodiment according to a kind of network access device of the utility model, due to the higher 100Mbps of the signal rate of transmitting on the network signal circuit, circuit of high transfer rate is so protected, the transmission that must guarantee its data can not be affected because of the mounted with lightning protection device, electronics amplitude limit module comprises bridge rectifier, transient voltage suppressor diode and two ground connection diodes, the input of described bridge rectifier connects respectively two signal line, output termination transient voltage suppressor diode two ends, in described two ground connection diodes: the output of a ground connection diode is connected with earth connection, input is connected with the output of bridge rectifier, the input of another ground connection diode is connected with earth connection, output is connected with the output of bridge rectifier, the diode of the low appearance value in bridge rectifier passes and is connected with transient voltage suppressor diode, reduce the appearance value of transient voltage suppressor diode, guarantee the transmission of circuit.
According to a preferred embodiment of a kind of network access device of the utility model, the network data line has 8.
Fig. 3 and Fig. 4 show another embodiment of a kind of network access device of utility model, the switch body fuselage is provided with the whether normal warning light of display power supply lightning protection circuit, be provided with louvre 3, be provided with the network port 4 and the USB socket 5 that are connected with signal lighting protection circuit, be provided with and power lightning protection circuit power input socket 6 and power output socket 7, for power consumption equipment provides power supply, be provided with the earth jack 8 that is connected with earth connection, earth jack 8 is used for earth connection by plug wire mode ground connection, when making ground connection, such structure only needs the ground connection lot line directly is connected with earth connection jack interface 8 to get final product, simple to operation.
According to another preferred embodiment of a kind of network access device of the utility model, described warning light is divided into the red led 1 that showed and the green indicating lamp 2 that shows in the time of normal operation when lightning protection was lost efficacy.
Although with reference to a plurality of explanatory embodiment of the present utility model, the utility model is described here, but, should be appreciated that, those skilled in the art can design a lot of other modification and execution modes, and these are revised and within execution mode will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to building block and/or the layout of subject combination layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes will be also obvious.
Claims (4)
1. a network access device, comprise switch, it is characterized in that: power lightning protection circuit and signal lighting protection circuit are installed in the switch body,
Described power lightning protection circuit comprises gas discharge tube and three groups of high-pressure and overflowing protection modules that are cascaded and consisted of by piezo-resistance, Thermal Cutoffs, first group of one end of described high-pressure and overflowing protection module is connected with live wire, the other end is connected with gas discharge tube, second group of one end of described high-pressure and overflowing protected location is connected with zero line, the other end is connected with gas discharge tube, the 3rd group of two ends of described high-pressure and overflowing protected location connect respectively zero line and live wire, and described gas discharge tube is connected with earth connection;
Described signal lighting protection circuit comprises gas discharge tube and electronics amplitude limit module, and described gas discharge tube and electronics amplitude limit module are connected between two signal line in the network data line, and described electronics amplitude limit module is connected with earth connection.
2. a kind of network access device according to claim 1, it is characterized in that: described electronics amplitude limit module comprises bridge rectifier, transient voltage suppressor diode and two ground connection diodes, the input of described bridge rectifier connects respectively two signal line, output termination transient voltage suppressor diode two ends, in described two ground connection diodes: the output of a ground connection diode is connected with earth connection, input is connected with the output of bridge rectifier, the input of another ground connection diode is connected with earth connection, output is connected with the output of bridge rectifier.
3. a kind of network access device according to claim 1 and 2, it is characterized in that: described network data line has 8.
4. a kind of network access device according to claim 1 and 2, it is characterized in that: described switch body fuselage is provided with the whether normal warning light of display power supply lightning protection circuit, be provided with louvre (3), be provided with the network port (4) and the USB socket (5) that are connected with signal lighting protection circuit, be provided with and power lightning protection circuit power input socket (6) and power output socket (7), be provided with the earth jack (8) that is connected with earth connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220545288 CN202949438U (en) | 2012-10-23 | 2012-10-23 | Network access device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220545288 CN202949438U (en) | 2012-10-23 | 2012-10-23 | Network access device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202949438U true CN202949438U (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220545288 Expired - Lifetime CN202949438U (en) | 2012-10-23 | 2012-10-23 | Network access device |
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| CN (1) | CN202949438U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001776A (en) * | 2012-10-23 | 2013-03-27 | 四川省电力公司内江电业局 | Network accessing device |
| CN115225043A (en) * | 2022-07-27 | 2022-10-21 | 中国民航大学 | Electromagnetic protection circuit for low-noise amplifier of Beidou receiver |
-
2012
- 2012-10-23 CN CN 201220545288 patent/CN202949438U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001776A (en) * | 2012-10-23 | 2013-03-27 | 四川省电力公司内江电业局 | Network accessing device |
| CN115225043A (en) * | 2022-07-27 | 2022-10-21 | 中国民航大学 | Electromagnetic protection circuit for low-noise amplifier of Beidou receiver |
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Granted publication date: 20130522 |