CN202856329U - Grounding-free lightning pulse isolator - Google Patents
Grounding-free lightning pulse isolator Download PDFInfo
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- CN202856329U CN202856329U CN 201220549850 CN201220549850U CN202856329U CN 202856329 U CN202856329 U CN 202856329U CN 201220549850 CN201220549850 CN 201220549850 CN 201220549850 U CN201220549850 U CN 201220549850U CN 202856329 U CN202856329 U CN 202856329U
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Abstract
The utility model provides a grounding-free lightning pulse isolator, which comprises a shell, an input end and an output end, wherein the input end is provided with an attenuation compensation circuit and an isolation unit; the isolation unit is provided with an input signal processing unit and a lightning protection circuit; the output end is provided with a shielding circuit; the shielding circuit is provided with an instant surge voltage protection element and an input signal processing unit; the input end is electrically connected with the attenuation compensation circuit, the isolation unit, the input signal processing unit and the lightning protection circuit; the shielding circuit is provided with a reference zero potential; the shielding circuit, the instant surge voltage protection element and the input signal processing unit are electrically connected with the output end; and the external part of the shielding circuit is coated by an electromagnetic shielding material. The grounding-free lightning pulse isolator provided by the utility model is simple in structure, and electricity between the input end and the output end is completely isolated, thereby being capable of effectively suppressing interferences of other electronic equipment; and the grounding is not needed, the shock resistant voltage is high, and the shielding and anti-interference effects are good.
Description
Technical field:
The utility model relates to weak current equipment or the communication apparatus is used the shocking preventing technology field, particularly a kind of ground connection lightening pulse isolator of exempting from.
Background technology:
The realization monitoring and controlling need to be used various instrument and meter for automations, control system and actuator etc. in industrial processes or in the data transmission procedure, signal between them transmits existing faint small-signal to millivolt level, microampere order, there are again tens volts, even thousands of volt, hundreds of amperes large-signal; Existing low frequency direct current signal also has high-frequency pulse signal etc., often finds behind the construction system that the signal transmission interferes with each other between instrument and equipment, causes the unstable even misoperation of system.This situation appears except the performance reason such as anti-electromagnetic interference influence of each instrument, equipment itself, also have a very important factor to be exactly owing to have electrical potential difference between the signal reference point between instrument and the equipment, thereby formation " ground loop " cause distortion in the signals transmission.Especially in thunder and lightning weather, to the equipment harm of the normal operations such as transducer, instrument and meter the most serious be that lightening pulse disturbs.Thunder and lightning is a kind of main natural disturbance source, and the interference that thunder and lightning produces can be transferred to the place beyond thousands of kilometers.The time domain waveform that thunder and lightning disturbs is a large spike that is superimposed upon on a string random pulses background.Interference for the control lightening pulse, if use hardware controls, way commonly used mainly contains three kinds: 1. seal in interference suppressor by the principle design of spectral equalization at the instrument ac power input end, the energy distribution that peak voltage is concentrated on different frequency ranges, thereby weaken its destructiveness; 2. add super isolator at the instrument ac power input end, utilize the ferromagnetic resonance principle to suppress spike; 3. in the input of instrument AC power piezo-resistance in parallel, resistance value reduces the voltage got from power supply with lowering apparatus when utilizing spike to arrive, thereby weakens the impact of disturbing.
For the method that control is disturbed for isolator, isolator is made of 4 parts such as input signal processing unit, isolated location, output signal processing unit, power supply usually.But still there is the problem of ground loop, all field apparatuss are earth-free, make all process loops only have an earth point, can not form the loop, this method seems simply, but often is difficult in actual applications realize, because some equipment requirement must ground connection guarantee certainty of measurement or is guaranteed life safety, some equipment may be because be corroded and wear and tear afterwards or climatic effect and form new earth point for a long time, so, still there is the distorted signals problem.And, can't accomplish completely electric completely cutting off between the equipment, and effectiveness is bad, lightening pulse causes the distorted signals problem still unresolved.
Summary of the invention:
The purpose of this utility model is to overcome the shortcoming that exists in the prior art, provide a kind of simple in structure, easy to use, electric fully isolated between input and the output, interference that can other electronic equipments of establishment, and need not ground connection, shock resistance voltage is high, shielding and the good a kind of ground connection lightening pulse isolator of exempting from of anti-jamming effectiveness.
To achieve these goals; the utility model provides a kind of ground connection lightening pulse isolator of exempting from; comprise housing; input and output; wherein; described input is provided with attenuation compensation circuit and isolated location; be provided with input signal processing unit and lightning protection circuit on the described isolated location; described output is provided with screened circuit; be provided with moment surge voltage protection element and output signal processing unit on the described screened circuit; described input and described attenuation compensation circuit; isolated location; the input signal processing unit; be electrically connected between the lightning protection circuit; be provided with reference to zero potential described screened circuit on the described screened circuit; described moment surge voltage protection element; be electrically connected between described output signal processing unit and the described output.
Described screened circuit outside is coated with electromagnetic shielding material, and described electromagnetic shielding material is any one in conductive rubber, conducting foam, beallon reed, screen conducting adhesive tape or the silicone grease conducting resinl.
The both sides of the bottom of described housing are provided with fixed edge, are provided with fixing hole on the described fixed edge, are fixedly connected with between described fixed edge, described fixing hole and the described housing.
Described is the reference zero potential of the electronic devices and components on the housing interior circuit board with reference to zero potential, is that it exempts from ground connection for the interference signal that reduces external system affects power supply normal operation, forms a relatively independent system with inner member is common.
Each electronic component of described housing is installed on the circuit board, and each element of enclosure interior adopts polymer composite, such as macromolecule resin material encapsulation, good insulating.
Disconnect by isolated location between described input and the output, fully electric isolated.
Isolated component can substitute with isolation fasteners such as DCS or PLC.
The utility model has the advantage of, simple in structure, easy to use, electric fully isolated between input and the output, interference that can other electronic equipments of establishment, and need not ground connection, and shock resistance voltage is high, and shielding and anti-jamming effectiveness are good, are specially:
Use isolated location, make input and output complete electrical insulation, also with this loop isolation, thereby lightning current is cut to minimum, establishment is from the various interference of power supply and other circuit; Adopt over the ground to suspend, need not ground connection, protection effect is good; Shock-resistant voltage is high, and the 30kv experiment is without puncturing; Electronic component adopts the polymer composite encapsulation, and insulativity is high.Output adopts the electromagnetic shielding material shielding, and anti-jamming effectiveness is good.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is stereoscopic-state figure of the present utility model.
The accompanying drawing sign:
1, input, 2, attenuation compensation circuit, 3, isolated location
4, screened circuit 5, housing 6, output
7, with reference to zero potential 8, fixing hole 9, fixed edge
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described.
Such as Fig. 1-shown in Figure 2, Fig. 1 is structural representation of the present utility model.Fig. 2 is stereoscopic-state figure of the present utility model.
The utility model is exempted from ground connection lightening pulse isolator; comprise housing 5; input 1 and output 6; wherein; input 1 is provided with attenuation compensation circuit and isolated location 3; be provided with input signal processing unit and lightning protection circuit on the isolated location 3; output is provided with screened circuit 4; be provided with moment surge voltage protection element and output signal processing unit on the screened circuit 4; input 1 and attenuation compensation circuit; isolated location 3; the input signal processing unit; be electrically connected between the lightning protection circuit; be provided with reference to zero potential 7 screened circuit 4 on the screened circuit 4; moment surge voltage protection element; be electrically connected between output signal processing unit and the output 6.Screened circuit 4 outsides are coated with electromagnetic shielding material, and electromagnetic shielding material is any one in conductive rubber, conducting foam, beallon reed, screen conducting adhesive tape or the silicone grease conducting resinl.The both sides of the bottom of housing 5 are provided with fixed edge 9, are provided with fixing hole 8 on the fixed edge 9, are fixedly connected with between fixed edge 9, fixing hole 8 and the housing 5.Being the reference zero potential of the electronic devices and components on housing 5 interior circuit boards with reference to zero potential 7, is that it exempts from ground connection for the interference signal that reduces external system affects the power supply normal operation, forms a relatively independent system with inner member is common.Each electronic component of housing 5 is installed on the circuit board, and housing 5 inner each element adopt polymer composite, such as macromolecule resin material encapsulation, good insulating.Disconnect by isolated location between input 1 and the output 6, fully electric isolated.
The utility model is simple in structure, easy to use, electric fully isolated between input and the output, interference that can other electronic equipments of establishment, and need not ground connection, shock resistance voltage is high, and shielding and anti-jamming effectiveness are good, uses isolated location, make input and output complete electrical insulation, also with the isolation of this loop, thereby lightning current is cut to minimum, establishment is from the various interference of power supply and other circuit; Adopt over the ground to suspend, need not ground connection, protection effect is good; Shock-resistant voltage is high, and the 30kv experiment is without puncturing; Electronic component adopts the polymer composite encapsulation, and insulativity is high.Output adopts the electromagnetic shielding material shielding, and anti-jamming effectiveness is good.
Claims (3)
1. exempt from ground connection lightening pulse isolator for one kind; comprise housing; input and output; it is characterized in that; described input is provided with attenuation compensation circuit and isolated location; be provided with input signal processing unit and lightning protection circuit on the described isolated location; described output is provided with screened circuit; be provided with moment surge voltage protection element and output signal processing unit on the described screened circuit; described input and described attenuation compensation circuit; isolated location; the input signal processing unit; be electrically connected between the lightning protection circuit; be provided with reference to zero potential described screened circuit on the described screened circuit; described moment surge voltage protection element; be electrically connected between described output signal processing unit and the described output.
2. the described ground connection lightening pulse isolator of exempting from according to claim 1, it is characterized in that, described screened circuit outside is coated with electromagnetic shielding material, and described electromagnetic shielding material is any one in conductive rubber, conducting foam, beallon reed, screen conducting adhesive tape or the silicone grease conducting resinl.
3. the described ground connection lightening pulse isolator of exempting from according to claim 1 and 2 is characterized in that the both sides of the bottom of described housing are provided with fixed edge, is provided with fixing hole on the described fixed edge, is fixedly connected with between described fixed edge, described fixing hole and the described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220549850 CN202856329U (en) | 2012-10-25 | 2012-10-25 | Grounding-free lightning pulse isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220549850 CN202856329U (en) | 2012-10-25 | 2012-10-25 | Grounding-free lightning pulse isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202856329U true CN202856329U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220549850 Expired - Fee Related CN202856329U (en) | 2012-10-25 | 2012-10-25 | Grounding-free lightning pulse isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202856329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
-
2012
- 2012-10-25 CN CN 201220549850 patent/CN202856329U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20191025 |