CN201629491U - Discharge tube - Google Patents
Discharge tube Download PDFInfo
- Publication number
- CN201629491U CN201629491U CN2010201139165U CN201020113916U CN201629491U CN 201629491 U CN201629491 U CN 201629491U CN 2010201139165 U CN2010201139165 U CN 2010201139165U CN 201020113916 U CN201020113916 U CN 201020113916U CN 201629491 U CN201629491 U CN 201629491U
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- discharge tube
- discharge
- film
- ceramic shell
- pair
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Abstract
The utility model discloses a discharge tube, which comprises a pair of discharge electrodes, a ceramic casing, a closed switch discharge gap and a resistance layer with a resistance value. The discharge electrodes and the ceramic casing form the closed switch discharge gap, and two ends of the resistance layer are respectively connected with the pair of the discharge electrodes. The utility model further provides a device comprising the discharge tube, which comprises at least one first discharge tube and at least one second discharge tube which are connected in series. The first discharge tube comprises a pair of discharge electrodes, a ceramic casing, a closed switch discharge gap and a resistance layer with a resistance value, the discharge electrodes and the ceramic casing form the closed switch discharge gap, and two ends of the resistance layer are respectively connected with the pair of the discharge electrodes. The second discharge tube is a metal ceramic gas discharge tube or a piezoresistor. The discharge tube and the device comprising the same have the advantages of simple structures, small volumes, and great space reduction in surge protection device.
Description
Technical field
The utility model relates to a kind of discharge tube and comprises the device of discharge tube.
Background technology
The airtight discharging gap that existing ceramet gas discharge tube is made up of pair of discharge electrodes, ceramic shell and sparking electrode and ceramic shell is formed; when transient voltage reaches the puncture voltage of ceramet gas discharge tube by the gap in gas discharge with the surge voltage ground of releasing; resistance after the single metal ceramic gas discharge tube is breakdown is minimum, voltage pole is low; there is afterflow even may causes short circuit, can not directly be used in and do the differential mode protection in the active circuit.
As shown in Figure 1; be input as power supply; output connects protected electronic equipment; existing discharge tube arrangement 30 is made of 5 series connection of at least two ceramet gas discharge tubes; this device generally is used for Surge Protector; Surge Protector is parallel to protected electronic equipment two ends, protects electronic equipment by the surge current of releasing, restriction surge voltage, and the lightning current of releasing, restriction surge voltage these two effects mainly are to be finished by ceramet gas discharge tube 5.
When protected circuit operate as normal, before moment, surge voltage do not arrive, ceramet gas discharge tube 5 manifested the high resistant state of insulation, to the not influence of protected circuit; And when the transient state surge arrives; the ceramet gas discharge tube 5 of series connection in the discharge tube arrangement 30 is simultaneously breakdown; present the surge protection spike one time; ceramet gas discharge tube 5 becomes the low-resistance conducting state by the high resistant state of insulation; surge current is released; and with the voltage limit at protected equipment two ends in lower level; after the surge end; ceramet gas discharge tube 5 rapidly, automatically reverts to high resistance again; if above-mentioned being swift in motion and successfully finishing, protected circuit just can not suffer the harm of thunder and lightning or operation surge.
Though a plurality of ceramet gas discharge tubes 5 of above-mentioned series connection solve the afterflow problem, but can make discharge tube arrangement 30 starting resistor height, bring the surge peak voltage very high, too high surge residual voltage will be damaged electronic equipment relatively fragile on the circuit, the method that solves be discharge tube arrangement 30 on wherein one or more ceramet gas discharge tubes on 5 parallel resistance realize that the secondary discharge is with reduction discharge tube arrangement 30 starting resistors, yet when a plurality of resistance in parallel, cause many, the complex structure of discharge tube device, volume is big, has occupied big quantity space.
The utility model content
One of the purpose of this utility model is for providing a kind of simple in structure, discharge tube that volume is little.
The discharge tube that the utility model provides comprises airtight switch discharging gap that pair of discharge electrodes, ceramic shell, sparking electrode and ceramic shell form and the resistive layer of being with resistance, and these resistive layer two ends are connected with pair of discharge electrodes respectively.
Preferably, described resistive layer is a resistive film, is attached to ceramic shell surface and/or inwall.
Preferably, it is part or all of that described resistive film covers ceramic shell.
Preferably, the material of described resistive film is carbon film, metal film, metal oxide film, metal glass uranium film or synthetic film.
Preferably, described resistive layer is a resistor, is attached in ceramic shell surface, inwall and/or the switch discharging gap.
Described discharge tube has reduced the starting resistor of surge protection circuit, i.e. surge protection peak voltage value.
The utility model provides a kind of device that comprises discharge tube in addition, comprises at least one first discharge tube and at least one second discharge tube of series connection;
Wherein, described first discharge tube comprises airtight switch discharging gap that pair of discharge electrodes, ceramic shell, sparking electrode and ceramic shell form and the resistive layer of being with resistance, and these resistive layer two ends are connected with pair of discharge electrodes respectively;
Described second discharge tube is ceramet gas discharge tube or piezo-resistance.
Preferably, described resistive layer is a resistive film, is attached to ceramic shell surface and/or inwall.
Preferably, it is part or all of that described resistive film covers ceramic shell.
Preferably, the material of described resistive film is carbon film, metal film, metal oxide film, metal glass uranium film or synthetic film.
Preferably, described resistive layer is a resistor, is attached in ceramic shell surface, inwall and/or the switch discharging gap.
The described device of discharge tube that comprises is parallel between power supply and the protected electronic equipment of back level; can realize that device simple in structure by, that volume is little just realizes secondary discharge; present two lower surge protection spikes, level protected electronic equipment in protection back has been saved the space simultaneously greatly.
Description of drawings
Fig. 1 is the circuit diagram of existing discharge tube;
Fig. 2 is one of discharge tube structure schematic diagram among the utility model one embodiment;
Fig. 3 be among the utility model one embodiment the discharge tube structure schematic diagram two;
Fig. 4 is the circuit diagram that comprises the device of discharge tube among another embodiment of the utility model.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
With reference to Fig. 2 and Fig. 3, a kind of discharge tube of the utility model one embodiment is proposed, comprise the airtight switch discharging gap 4 that pair of discharge electrodes 1, ceramic shell 2, sparking electrode 1 and ceramic shell 2 form, also comprise the resistive layer 3 of being with resistance, resistive layer 3 two ends are connected with pair of discharge electrodes 1 respectively.
The discharge tube of present embodiment has reduced the starting resistor of surge protection circuit, i.e. surge protection peak voltage value owing to be provided with resistive layer 3.
Above-mentioned resistive layer 3 can be resistive film or resistor, and the resistance of resistive layer 3 is according to the practical application setting; Above-mentioned resistive film is attached to ceramic shell surface and/or inwall.As shown in Figure 2, this resistive film can be attached to the ceramic shell surface, and the resistive film material is carbon film, metal film, metal oxide film, metal glass uranium film, synthetic film or other electric conducting material, and the plated film mode can adopt vacuum coating, high temperature deposition or silk-screen etc.This resistive film can cover the part or all of of ceramic shell surface and/or inwall.
Above-mentioned resistor can be attached in ceramic shell surface, inwall and/or the switch discharging gap, and as shown in Figure 3, these resistor two ends are connected with pair of discharge electrodes respectively, and resistor can be the electric conductor that Chip-R, silicon chip or conductivity ceramics etc. have resistance.
With reference to Fig. 4; a kind of device 20 that comprises discharge tube of another embodiment of the utility model is proposed; this comprises that the device 20 of discharge tube is parallel between power supply and the protected electronic equipment of back level, comprises at least one first discharge tube 10 and at least one second discharge tube 6.
Above-mentioned second discharge tube 6 can be ceramet gas discharge tube, comprises the airtight discharging gap that pair of discharge electrodes, ceramic shell and sparking electrode and ceramic shell are formed; Second discharge tube 6 can also be piezo-resistance.
Above-mentioned first discharge tube 10 comprises airtight switch discharging gap that pair of discharge electrodes, ceramic shell, sparking electrode and ceramic shell form and the resistive layer of being with resistance, and these resistive layer two ends are connected with pair of discharge electrodes respectively.
Above-mentioned resistive layer equivalence is a resistance R, and first discharge tube 10 is equivalent to the in parallel of the 3rd discharge tube 9 and resistance R, and the 3rd discharge tube 9 is a ceramet gas discharge tube, and the resistance of resistance R is much smaller than the 3rd discharge tube 9 resistances.
The device 20 that comprises discharge tube mainly is the protected electronic equipment of principle protection back level by the secondary discharge; its operation principle is: when having surge voltage to invade in the circuit; transient voltage at first punctures second discharge tube 6 and discharges; puncturing first discharge tube 10 then discharges once more; in laboratory tests; this circuit presents two surge protection spikes; the peak voltage value is significantly less than the surge peak voltage value of the ceramet gas discharge tube of two series connection; be about 50% of prior art scheme surge peak voltage value, reduced the residual voltage that is added on the protected electronic equipment of back level.
Below we describe the device 20 that comprises discharge tube in detail in conjunction with Fig. 4 and how to realize secondary discharge and reduce residual voltage.When surge is invaded circuit; because the high value that the resistance of resistance R forms much smaller than first discharge tube, 10 interior switch discharging gaps; surge at first punctures second discharge tube 6 and presents first surge protection spike by resistance R; be Low ESR after second discharge tube 6 is breakdown; this moment, the electric current by resistance R produced voltage drop U=I * R on resistance R; this voltage can puncture first discharge tube 10 and present second surge protection spike; first discharge tube 10 also is Low ESR; this moment, first discharge tube 10 and second discharge tube 6 were all breakdown and present Low ESR; remaining most of surge current is continued by first discharge tube 10; second discharge tube 6 carries out leakage current; in this process; the effect of resistance R is very crucial, plays and induces surge to puncture second discharge tube 6, the and then auxiliary effect that punctures first discharge tube 10; gained surge protection peak voltage value; compare with the surge protection peak voltage value of background technology, about drop by half, the protected equipment of level is protected after an action of the bowels.
In the practical application, the device 20 that comprises discharge tube is composed in series by a plurality of first discharge tubes 10 and a plurality of second discharge tube 6 as required, disconnect the finish ability of subsequent flows of surge to improve discharge tube, this moment is because the resistive layer in first discharge tube 10, can save a plurality of parallel resistor, simple in structure, volume is little, has saved the device space greatly.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (10)
1. a discharge tube comprises the airtight switch discharging gap that pair of discharge electrodes, ceramic shell and sparking electrode and ceramic shell form, and it is characterized in that: also comprise the resistive layer of being with resistance, two ends are connected with pair of discharge electrodes respectively.
2. discharge tube according to claim 1 is characterized in that: described resistive layer is a resistive film, is attached to ceramic shell surface and/or inwall.
3. discharge tube according to claim 2 is characterized in that: it is part or all of that described resistive film covers ceramic shell.
4. according to claim 2 or 3 described discharge tubes, it is characterized in that: described resistive film is carbon film, metal film, metal oxide film, metal glass uranium film or synthetic film.
5. discharge tube according to claim 1 is characterized in that: described resistive layer is a resistor, is attached in ceramic shell surface, inwall and/or the switch discharging gap.
6. a device that comprises discharge tube is characterized in that: at least one first discharge tube and at least one second discharge tube that comprise series connection;
Wherein, described first discharge tube comprises airtight switch discharging gap that pair of discharge electrodes, ceramic shell, sparking electrode and ceramic shell form and the resistive layer of being with resistance, and these resistive layer two ends are connected with pair of discharge electrodes respectively;
Described second discharge tube is ceramet gas discharge tube or piezo-resistance.
7. the device that comprises discharge tube according to claim 6 is characterized in that: described resistive layer is a resistive film, is attached to ceramic shell surface and/or inwall.
8. the device that comprises discharge tube according to claim 7 is characterized in that: it is part or all of that described resistive film covers ceramic shell.
9. according to claim 7 or the 8 described devices that comprise discharge tube, it is characterized in that: described resistive film is carbon film, metal film, metal oxide film, metal glass uranium film or synthetic film.
10. the device that comprises discharge tube according to claim 6 is characterized in that: described resistive layer is a resistor, is attached in ceramic shell surface, inwall and/or the switch discharging gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201139165U CN201629491U (en) | 2010-02-05 | 2010-02-05 | Discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201139165U CN201629491U (en) | 2010-02-05 | 2010-02-05 | Discharge tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629491U true CN201629491U (en) | 2010-11-10 |
Family
ID=43060888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201139165U Expired - Lifetime CN201629491U (en) | 2010-02-05 | 2010-02-05 | Discharge tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201629491U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709902A (en) * | 2012-05-31 | 2012-10-03 | 华为技术有限公司 | Surge current protection device |
| CN110783906A (en) * | 2018-07-26 | 2020-02-11 | Ripd知识产权发展有限公司 | Surge protection device, circuit, module and system comprising surge protection device, circuit and module |
-
2010
- 2010-02-05 CN CN2010201139165U patent/CN201629491U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709902A (en) * | 2012-05-31 | 2012-10-03 | 华为技术有限公司 | Surge current protection device |
| CN110783906A (en) * | 2018-07-26 | 2020-02-11 | Ripd知识产权发展有限公司 | Surge protection device, circuit, module and system comprising surge protection device, circuit and module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101110 |
|
| CX01 | Expiry of patent term |