CN201149996Y - Explosion-proof surge protector - Google Patents
Explosion-proof surge protector Download PDFInfo
- Publication number
- CN201149996Y CN201149996Y CNU200820104042XU CN200820104042U CN201149996Y CN 201149996 Y CN201149996 Y CN 201149996Y CN U200820104042X U CNU200820104042X U CN U200820104042XU CN 200820104042 U CN200820104042 U CN 200820104042U CN 201149996 Y CN201149996 Y CN 201149996Y
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- Prior art keywords
- circuit
- copper stud
- connector
- surge protector
- explosion
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an explosion proof surging protector. All components are assembled in an explosion proof metallic and fully-closed casing body. The metallic and fully-closed casing body is composed of a main component and a connecting component, wherein, the main component comprises an outer casing, a circuit board, a grounding copper stud, a conducting wire, and a grounding wire, the grounding wire of the circuit board is welded at one end of the grounding copper stud, the screw thread at the bottom part of the metallic outer casing is connected at the other end of the grounding copper stud; the conducting wire pass through the connecting component and is connected with the signal wire of the protected device; the thread of the main component is connected at one end of the connecting component, the thread connector of the protected device is connected at the other end; the protection circuit is composed of a bleeder circuit, a current-limited circuit and a clamping circuit. The explosion proof surging protector is mainly applied in the lightning prevention of devices such as outdoor transmitters, flow gauges, liquid level gauges and warning devices in a petrochemical system, the lightning overvoltage intruded along the signal circuit can be effectively eliminated, the signal unblocking is ensured, and simultaneously the damage of the protecting device is avoided.
Description
Technical field
The utility model relates to a kind of surge protection device, particularly at equipment such as the transmitter of petroleum chemical industry TT﹠C system, flowmeter, liquid level gauge, alarms, needs to be equipped with the surge protector that reach the explosive-proof grade regulation.
Background technology
In recent years, the petroleum chemical industry TT﹠C system is to microelectronic network and intelligent direction development, and instrumentation ubiquity dielectric strength is low, overvoltage and the overcurrent tolerance is poor, to weakness such as electromagnetic interference sensitivities, in case instrumentation is subjected to direct stroke, or thunderbolt takes place and induction overvoltage, overcurrent in its near zone, can enter instrumentation by approach such as supply lines, holding wire, CABLE DUCT, penetration pipes and make its damage, also may cause production accident and casualties when serious.Because the petrochemical industry instrument has quite a few to be installed in outdoor inflammable and explosive place, therefore require to be equipped with the surge protector that reaches the explosive-proof grade regulation.
Summary of the invention
The purpose of this utility model is for effectively protecting the Lightning Over-voltage of invading along signal line, having designed multistage surge protecting circuit; In order to reach the requirement of explosion proof of regulation grade, specialized designs the totally enclosed frame of metal structure.
Technical solution adopted in the utility model is: integral body is made up of surge protector circuit and metal all-closed housing.
Metal all-closed housing is made up of main part and connector, and main part is used for the support and the close and protect of circuit board; Connector is installed in the utility model at the signal path position of protected equipment.Connector can be selected the screw thread of different size according to the installation dimension of distinct device.Described main part comprises shell, circuit board, ground connection copper stud, lead, earth connection, the ground wire of circuit board and the welding of ground connection copper stud one end, and the copper stud other end is threaded with the screw of metal shell bottom; Lead passes connector and is connected with protected device signal line, and connector one end is threaded with main part, and the other end is connected with the hickey of protected equipment;
Protective circuit is made up of leadage circuit, current-limiting circuit, clamp circuit, and wherein leadage circuit is a gas discharge tube, and current-limiting circuit is made of resistance element and inductive element parallel connection, and clamp circuit is the transient state voltage-stabiliser tube.
Described circuit and structure are incorporated in the same metal shell.
Characteristics of the present utility model and good effect:
Satisfying the lightning current of to release, when stoping the thunder and lightning access arrangement, can guarantee that again the transmission of signal with different type is unaffected; Next select for use anti-impact force good 45
#Steel matter, explosive-proof grade reach II class flame-proof type, and good construction process can prevent effectively that product self from becoming quick-fried source, can effectively stop external flame to penetrate body clearance and reduce flame temperature simultaneously; Especially at
Modern petrochemical industry field instrument designs, and different equipment uses different connectors, and is easy for installation, good looking appearance.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is a structure cutaway view of the present utility model.
Fig. 3 is an outline drawing of the present utility model.
Embodiment
The surge protector circuit is made up of bleeder circuit, current-limiting circuit and clamp circuit.Electrical principle as shown in Figure 1, signal input part connects bleeder circuit, promptly gas discharge tube 1,2, and the thunderbolt overcurrent of intrusion is released into ground from gas discharge tube 1,2; Remaining overcurrent is through self- healing fuse 4,5,7, thereby its resistance value is risen rapidly reach current limliting, the clamp circuit that high-power transient state voltage- stabiliser tube 9,10,11 constitutes connects signal output part, residual voltage and line voltage all can be limited within the limits prescribed, various interference sources also under the effect of this circuit, are effectively drawn up.For guaranteeing the transmission of device detection signal, dissimilar signals such as liquid level, pressure, flow, start and stop state for example, include 4～20mA signal, pulsed quantity frequency signal, alarm signal and thermocouple signal etc., so the two ends shunt inductance 3,6,8 at self- healing fuse 4,5,7 constitutes current-limiting circuit, so promptly do not influence the signal transmission and can play protection effect again.Above-mentioned said circuit at different levels are assemblied in the same metal all-closed shell.
The utility model structure such as Fig. 2, shown in Figure 3; 12 is that circuit board, 13 is that ground connection copper stud, 14 is connector among the figure; connector 14 mid portions are hex nuts; two ends are external screw thread; wherein an end is identical with the internal thread specification of shell 15; the other end can be selected the screw thread of different size according to the different hickey of protected equipment, and 15 is that shell, 16 is that earth connection, 17 is the embedding thing for connecting lead, 18.The ground wire of circuit board 12 and the welding of ground connection copper stud 13 1 ends; copper stud 13 other ends are threaded with the screw of shell 15 bottoms; lead 17 passes connector 14 and is connected with protected device signal line; connector 14 1 ends are threaded with main part, and the other end is connected with the hickey of protected equipment.
Claims (3)
1, a kind of explosion-proof surge protector, comprise surge protector circuit and housing, it is characterized in that: metal all-closed housing is made up of main part and connector, main part comprises shell (15), circuit board (12), ground connection copper stud (13), lead (17), earth connection (16), the ground wire of circuit board (12) and the welding of ground connection copper stud (13) one ends, copper stud (13) other end is threaded with the screw of metal shell (15) bottom; Lead (17) passes connector (14) and is connected with protected device signal line, and connector (14) one ends are threaded with main part, and the other end is connected with the hickey of protected equipment;
Protective circuit is made up of leadage circuit, current-limiting circuit, clamp circuit; wherein leadage circuit is gas discharge tube (1), (2); current-limiting circuit is by resistance element (4), (5), (7) and inductive element (3), (6), (8) formation in parallel, and clamp circuit is transient state voltage-stabiliser tube (9), (10), (11).
2, explosion-proof surge protector according to claim 1; it is characterized in that: connector (14) mid portion is a hex nut; two ends are external screw thread; wherein an end is identical with the internal thread specification of shell (15), and the other end can be selected the screw thread of different size according to the different hickey of protected equipment.
3, explosion-proof surge protector according to claim 1, it is characterized in that: described circuit and structure are incorporated in the same metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820104042XU CN201149996Y (en) | 2008-01-23 | 2008-01-23 | Explosion-proof surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820104042XU CN201149996Y (en) | 2008-01-23 | 2008-01-23 | Explosion-proof surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201149996Y true CN201149996Y (en) | 2008-11-12 |
Family
ID=40117769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820104042XU Expired - Fee Related CN201149996Y (en) | 2008-01-23 | 2008-01-23 | Explosion-proof surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201149996Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429118A (en) * | 2015-12-21 | 2016-03-23 | 上海欣丰电子有限公司 | Fire-proof and explosion-proof three-phase power supply lightning protection device |
| CN106655129A (en) * | 2015-10-30 | 2017-05-10 | 上海宝临防爆电器有限公司 | Integrated explosion-proof surge protector protected by flameproof enclosure |
-
2008
- 2008-01-23 CN CNU200820104042XU patent/CN201149996Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655129A (en) * | 2015-10-30 | 2017-05-10 | 上海宝临防爆电器有限公司 | Integrated explosion-proof surge protector protected by flameproof enclosure |
| CN105429118A (en) * | 2015-12-21 | 2016-03-23 | 上海欣丰电子有限公司 | Fire-proof and explosion-proof three-phase power supply lightning protection device |
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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 |
Granted publication date: 20081112 Termination date: 20130123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |