CN2785116Y - Heat deviation structure of surge protector - Google Patents

Heat deviation structure of surge protector Download PDF

Info

Publication number
CN2785116Y
CN2785116Y CNU2005200394673U CN200520039467U CN2785116Y CN 2785116 Y CN2785116 Y CN 2785116Y CN U2005200394673 U CNU2005200394673 U CN U2005200394673U CN 200520039467 U CN200520039467 U CN 200520039467U CN 2785116 Y CN2785116 Y CN 2785116Y
Authority
CN
China
Prior art keywords
push rod
surge protector
cover cap
conducting strip
spring
Prior art date
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
Application number
CNU2005200394673U
Other languages
Chinese (zh)
Inventor
倪向宇
张佑祥
张小伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delixi Electrical Appliance Co Ltd Zhejiang
Original Assignee
Delixi Electrical Appliance Co Ltd Zhejiang
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Delixi Electrical Appliance Co Ltd Zhejiang filed Critical Delixi Electrical Appliance Co Ltd Zhejiang
Priority to CNU2005200394673U priority Critical patent/CN2785116Y/en
Application granted granted Critical
Publication of CN2785116Y publication Critical patent/CN2785116Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/10—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)

Abstract

The utility model discloses a heat deviation mechanism of a surge protector, which comprises an electrode plate and a connection plate fixed in a cover cap. A push rod is arranged in the cover cap. A conductive strip is fixed on the tail of the push rod and is welded with the electrode plate and the connection plate through low-melting metal. A spring is sheathed on the head of the push rod and pressed between the cover cap and the convex shoulder of the push rod. When the surge protector is broken and continues to emit heat, the heat quantity transferred by the electrode plate makes the low-melting metal melted and the push rod and the conductive strip on the push rod quickly move downwards under the action of the spring to completely cut off the connection between the connection plate and the electrode plate and realize thorough disengagement. The thermal-release mechanism is safer and more reliable.

Description

The hot releasing mechanism of surge protector
Technical field
The utility model relates to a kind of hot releasing mechanism of surge protector, and this hot releasing mechanism is applicable in the low-voltage distribution system in the surge protector.
Background technology
Along with expanding economy, electric equipment just develops towards the direction of tipped, precise treatment and sensitization, and this just has higher requirement to the stability of power supply.But because the folding of power supply, frequent closely thunderbolt etc. often causes and occurs surge in the power supply, promptly a kind of paroxysmal, hold time extremely shortly, but crest voltage reaches the overvoltage of 6000V, and circuit and equipment are caused great harm.How to prevent the harm that overvoltage is brought, more and more be subjected to people's attention and attention.Lightning protection is a system engineering, is made of outside lightning-protection system and internal lighting protection system.Outside lightning-protection system mainly is made of arrester, downlead, shielding, grounding system.The internal lighting protection system mainly is made up of shielding, equipotential connection, reasonable line arrangement, surge protector.The internal lighting protection system extensive use of voltage limit type surge protector in low-voltage distribution system, and obtained good effect.
Voltage limit type surge protector utilizes the nonlinear characteristic of Zinc-oxide piezoresistor, and thunderbolt or the overvoltage energy that causes of switching manipulation are absorbed and suppress, and with the overvoltage energy the earth of releasing, thereby power network overvoltage is suppressed.But because frequent overvoltage; or product is long and aging service time; cause the leakage current of surge protector to continue to increase; non-linear behaviour reduces; the product deterioration, this moment, surge protector will persistent fever, and is aging until inefficacy; just need reliable, a stable hot releasing mechanism this moment and guarantee that surge protector can be in time with circuitry cuts after heating was lost efficacy, thereby prevent the fire hazard that causes owing to the surge protector excessive heating.
The hot releasing mechanism of existing surge protector is multifarious, characteristics are respectively arranged, but it is not thorough often all to exist disengaging, and the problem that circuit can not be cut off fully will form short-channel to power-frequency voltage like this, thereby causes accident; On the other hand, hot releasing mechanism also is the place of most fragile in the surge protector, usually damages the fracture disengaging under the heavy current impact that regulation allows, thereby finishes the life-span of surge protector in advance.
The utility model content
The technical problems to be solved in the utility model provides a kind of hot releasing mechanism of more safe and reliable surge protector.
In order to solve the problems of the technologies described above; the utility model adopts following technical scheme: a kind of hot releasing mechanism of surge protector; comprise that electrode slice and joint cover are fixed in the cover cap; also be provided with a push rod in the cover cap; the afterbody of described push rod has been fixed a conducting strip; conducting strip and electrode slice, joint cover weld together by low-melting-point metal, and the head of push rod is overlapping a spring, and spring is compressed between the convex shoulder of cover cap and push rod.
When surge protector breaks down and during persistent fever; the heat of electrode slice transmission makes low-melting-point metal fusing, push rod and on conducting strip under the effect of spring, move downward rapidly, the connection between joint cover and the electrode slice is cut off fully; realize thoroughly breaking away from, therefore safer.
As a kind of preferred version of technique scheme, described conducting strip is fixed in the groove on the push rod.Conducting strip is positioned at the accumulation that groove helps low-melting-point metal, makes the welding of itself and electrode slice, joint cover more firm, can not rupture under the impact of the big electric current that regulation allows, and is difficult for misoperation takes place, and reliability is higher.
As improvement to above-mentioned preferred version, be provided with a boss in the behind of described push rod, in the cover cap and the interval of the boss on push rod coverage is provided with baffle plate.Because the push rod afterbody is provided with groove, relatively fragile, when action took place push rod, boss and baffle plate had limited the range of movement of push rod, can avoid its afterbody to fracture because of being subjected to impacting.
Description of drawings
Fig. 1 is a kind of structural representation of hot releasing mechanism of the present utility model.
Fig. 2 is cover cap and the electrode slice wherein and the scheme of installation of joint cover in the hot releasing mechanism of the present utility model.
Fig. 3 is the partial enlarged drawing at I place among Fig. 1.
Fig. 4 is the perspective view of push rod.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
Electrode slice 6 on the surge protector chip is installed in the cover cap 1; joint cover 5 also sticks in the cover cap 1; spring 2 is inserted on the head convex shoulder of plastic push-rod 3, and U-shaped conducting strip 8 is fixed in the groove 10 of push rod 3 afterbodys, is provided with boss 9 in the groove 10 and matches with the centre bore of conducting strip 8.During assembling, push rod 3 is contained in the cover cap 1, upwards promote push rod 3 then, holddown spring 2, when conducting strip 8 is in best welding position shown in Figure 1, keep the invariant position of this moment, the low temperature scolding tin that has melted is filled with in the U-shaped depression of conducting strip 8, till electrode slice 6, joint cover 5 and conducting strip 8 are welded together, this moment conducting strip 8 with electrode slice 6, joint cover 5 between formation twice weld seam 4.Low temperature scolding tin covers thickness on conducting strip 8 sunk surfaces greater than 1.5mm, and length has 3mm, thereby the bonding area that has guaranteed weld seam 4 reaches 4.5mm 2More than, guaranteed welding reliability and fastness, improved the ability of bearing heavy current impact.This moment, surge protector was in normal operating conditions.
When surge protector breaks down and during persistent fever; after electrode slice 6 heat conduction; heat transferred is arrived conducting strip 8 places; when the temperature at conducting strip 8 places reaches the fusing point of low temperature scolding tin; low temperature melts soldering tin on the conducting strip 8; push rod 3 moves downward rapidly under the effect of spring 2, simultaneously the low temperature scolding tin that may link to each other between joint cover 5 and the electrode slice 6 is cut off.Because the back of push rod 3 is provided with boss 11, when boss 11 when baffle plate 7 on the cover cap 1 contacts, push rod 3 is blocked stop motion, avoids its afterbody and cover cap 1 to clash into and damages.At this moment, conducting strip 8 separates with electrode slice 6, joint cover 5, forms insulating tape by plastic push-rod 3 between electrode slice 6 and the joint cover 5, and circuit is completely severed, and prevents the fire hazard that causes owing to the heating of surge protector fault.

Claims (3)

1. the hot releasing mechanism of a surge protector; comprise that electrode slice (6) and joint cover (5) are fixed in the cover cap (1); it is characterized in that: also be provided with a push rod (3) in the cover cap (1); the afterbody of described push rod (3) has been fixed a conducting strip (8); conducting strip (8) welds together by low-melting-point metal with electrode slice (6), joint cover (5); the head of push rod (3) is overlapping a spring (2), and spring (2) is compressed between the convex shoulder of cover cap (1) and push rod (3).
2. the hot releasing mechanism of surge protector according to claim 1 is characterized in that: described conducting strip (8) is fixed in the groove (10) on the push rod (3).
3. the hot releasing mechanism of surge protector according to claim 2, it is characterized in that: the behind of described push rod (3) is provided with a boss (11), in the cover cap (1) with push rod (3) on boss (11) at interval coverage be provided with baffle plate (7).
CNU2005200394673U 2005-02-02 2005-02-02 Heat deviation structure of surge protector Expired - Fee Related CN2785116Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2005200394673U CN2785116Y (en) 2005-02-02 2005-02-02 Heat deviation structure of surge protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2005200394673U CN2785116Y (en) 2005-02-02 2005-02-02 Heat deviation structure of surge protector

Publications (1)

Publication Number Publication Date
CN2785116Y true CN2785116Y (en) 2006-05-31

Family

ID=36772081

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2005200394673U Expired - Fee Related CN2785116Y (en) 2005-02-02 2005-02-02 Heat deviation structure of surge protector

Country Status (1)

Country Link
CN (1) CN2785116Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011011985A1 (en) * 2009-07-27 2011-02-03 佛山市浦斯电子有限公司 Surge protector with thermal protection device
CN102780217A (en) * 2011-05-11 2012-11-14 上海电科电器科技有限公司 Surge protection device
CN105468815A (en) * 2015-11-02 2016-04-06 广东明家科技股份有限公司 Method and system for assessing thermally induced damage to varistor of lightningproof product
CN110335791A (en) * 2019-09-01 2019-10-15 捷捷半导体有限公司 A kind of failed open type protection device
CN110612587A (en) * 2017-03-14 2019-12-24 德恩塞两合公司 Thermally activatable mechanical switching device
CN113600949A (en) * 2021-08-26 2021-11-05 深圳市台基防雷科技有限公司惠阳分公司 Welding method of release mechanism of surge protector

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011011985A1 (en) * 2009-07-27 2011-02-03 佛山市浦斯电子有限公司 Surge protector with thermal protection device
CN101834434B (en) * 2009-07-27 2012-05-23 佛山市浦斯电子有限公司 Surge protector with thermal protection device
CN102780217A (en) * 2011-05-11 2012-11-14 上海电科电器科技有限公司 Surge protection device
CN102780217B (en) * 2011-05-11 2015-06-17 上海电科电器科技有限公司 Surge protection device
CN105468815A (en) * 2015-11-02 2016-04-06 广东明家科技股份有限公司 Method and system for assessing thermally induced damage to varistor of lightningproof product
CN105468815B (en) * 2015-11-02 2019-04-26 广东明家科技股份有限公司 A kind of thermotropic Damage assessment method and system of the varistor of lightning-protected product
CN110612587A (en) * 2017-03-14 2019-12-24 德恩塞两合公司 Thermally activatable mechanical switching device
CN110335791A (en) * 2019-09-01 2019-10-15 捷捷半导体有限公司 A kind of failed open type protection device
CN113600949A (en) * 2021-08-26 2021-11-05 深圳市台基防雷科技有限公司惠阳分公司 Welding method of release mechanism of surge protector
CN113600949B (en) * 2021-08-26 2022-11-01 深圳市台基防雷科技有限公司惠阳分公司 Welding method of release mechanism of surge protector

Similar Documents

Publication Publication Date Title
CN2785116Y (en) Heat deviation structure of surge protector
CN201126744Y (en) Nail type superheating diasmechanism tasis
CN203933002U (en) A kind of surge absoption protector with the hot detaching structure of displacement interrupter-type
US20120086540A1 (en) Device for protection from surges with improved thermal disconnector
US20080019073A1 (en) Overvoltage protection device with dual contact surface thermal disconnector
CN1110001A (en) Improved current limiting fuse and dropout fuse-holder
CN201733089U (en) Surge protector
CN2566515Y (en) Surge protector for place-in low voltage distributing system
CN110310872B (en) Multi-section lightning current-resistant fusing structure and fuse adopting same
CN110047718B (en) Two-section type lightning current-resistant fusing structure and fuse adopting same
CN2619393Y (en) Power lightning protector
CN211046452U (en) Fault current protector
CN101847858B (en) Lightning-protection fuse with reliable alarm and overvoltage surge protection device thereof
CN207426686U (en) A kind of surge protector
CN105610140A (en) Lightning protection surge protection device
CN212934289U (en) Thermal protection type piezoresistor
CN201466676U (en) Secondary grounding protector of electric power voltage transformer
CN210806738U (en) Thermal separation device capable of being interrupted in sequence through rotary linkage
CN110601164B (en) Rotary linkage thermal disengaging device capable of blocking in sequence
CN111554549A (en) Drop-out quick breaker, line quick breaking method and fuse action current calculation method
CN206211529U (en) Surge protector
CN202474850U (en) Surge protective device
CN202231302U (en) Rapid arc breaking device for lightning arrester over-voltage protection component over-voltage failure
CN204740999U (en) Sign a guarantee danger and surging bleeder of mechanism of warning
CN202444256U (en) Surge protection device

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee