CN203503565U - Electrothermal relay - Google Patents

Electrothermal relay Download PDF

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Publication number
CN203503565U
CN203503565U CN201320564031.0U CN201320564031U CN203503565U CN 203503565 U CN203503565 U CN 203503565U CN 201320564031 U CN201320564031 U CN 201320564031U CN 203503565 U CN203503565 U CN 203503565U
Authority
CN
China
Prior art keywords
guide plate
bimetal leaf
fixed
spring
support
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.)
Withdrawn - After Issue
Application number
CN201320564031.0U
Other languages
Chinese (zh)
Inventor
邱祖秀
叶云霞
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.)
State Grid Corp of China SGCC
State Grid Sichuan Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Sichuan Electric Power Co Ltd
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 State Grid Corp of China SGCC, State Grid Sichuan Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201320564031.0U priority Critical patent/CN203503565U/en
Application granted granted Critical
Publication of CN203503565U publication Critical patent/CN203503565U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses an electrothermal relay comprising at least one bimetallic strip and a support, one end of each bimetallic strip is fixed on a fixed column, a guide plate is arranged in the extension directions of the other ends of the bimetallic strips, the guide plate is not directly contacted with the bimetallic strips, the support is provided with a sliding groove, and the guide plate is installed in the sliding groove; and one side of the guide plate is provided with a lug, the lug is connected with one end of a spring, and the other end of the spring is fixed on the support. The telescoping direction of the spring is parallel to the length direction of the guide plate, the other side of the guide plate is provided with compensation metal sheets, the compensation metal sheets are adjacent to but not contacted with the unfixed ends of the bimetallic strips, the two ends of the guide plate are respectively provided with a usually-closed fixed contact and a usually-separated fixed contact, and the usually-separated fixed contact is provided with a reset button. The electrothermal relay is relatively simple in structure and linkage mechanisms are canceled, and therefore the electrothermal relay is not affected by linkage faults.

Description

A kind of thermal relay
Technical field
The utility model relates to a kind of relay, is specifically related to a kind of thermal relay.
Background technology
Relay, also claiming electric post, is a kind of electronic control device, and it has that control system claims not only input circuit and by control system but also claim output loop, conventionally be applied in automatic control circuit, it is actually a kind of " automatic switch " that removes to control larger electric current with less electric current.Therefore play the effects such as automatic adjusting, safeguard protection, change-over circuit in circuit.
Existing thermal relay is to utilize the electric current that flows into heater element to produce heat; make the bimetal leaf generation deformation of the different coefficients of expansion; when deformation reaches certain distance; just promote connecting rod action; control circuit is disconnected; thereby make contactor dead electricity, main circuit disconnects, and realizes the overload protection of motor.
In prior art, most thermal relays are all by connecting rod, to move to realize to disconnect control circuit, thereby make contactor dead electricity, and main circuit disconnects.When connecting rod breaks down, thermal relay is with regard to cisco unity malfunction.
Summary of the invention
Given this, the utility model object is to provide a kind of thermal relay, and this thermal relay is simple in structure, is difficult for breaking down.
For solving above technical problem, the technical scheme that the utility model provides is, a kind of thermal relay is provided, comprise at least one bimetal leaf and a support, this bimetal leaf one end is fixed on fixed leg, on the bearing of trend of the bimetal leaf other end, is provided with guide plate, and guide plate does not directly contact with bimetal leaf, on support, be provided with chute, described guide plate is arranged in chute; Guide plate one side is provided with projection, and projection is connected with one end of spring, and the other end of spring is fixed on support; The flexible direction of spring is parallel with the length direction of guide plate; The opposite side of guide plate is provided with compensation sheet metal, and the on-fixed end of compensation sheet metal and bimetal leaf is adjacent but do not contact, and guide plate two ends are respectively equipped with often closes fixed contact and often divides fixed contact, often divides reset button is installed on fixed contact.
Further, described compensation sheet metal is positioned at bimetal leaf bending direction one side.
Preferably, the material of described compensation sheet metal is identical with bimetal leaf.
Preferably, on described bimetal leaf, heater element is installed.
Preferably, described heater element is in parallel with bimetal leaf.
Compared with prior art, a technical scheme tool in technique scheme has the following advantages:
1, the utility model has been cancelled linkage, thereby can not be subject to the impact of connecting rod fault.
2, the utility model structure is more simple.
3, the utility model, by bimetal leaf being directly connected in main circuit or by bimetal leaf and heater element and being connected in main circuit, has strengthened the sensitivity of action.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model one preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing and a specific embodiment, describe.
Referring to Fig. 1.The described a kind of thermal relay of the present embodiment, comprises at least one bimetal leaf 3 and a support, and bimetal leaf has the metal of suitable performance or a kind of composite material that other material forms by two or more, belongs to current material.Bimetal leaf also claims thrermostatic bimetal-plate, because the thermal coefficient of expansion of each constituent element layer is different, when variations in temperature, the deformation of active layers is greater than the deformation of passive layer, thereby the integral body of bimetal leaf will be to passive layer curving, thereby the curvature of this composite material changes and produces deformation.Wherein, the coefficient of expansion is higher is called active layers; The coefficient of expansion is compared with the passive layer that is called at the end.
One end of bimetal leaf 3 is fixed on fixed leg 4, on the bearing of trend of bimetal leaf 3 other ends, is provided with guide plate 1, and in the chute of guide plate 1 rack-mount setting, guide plate 1 is slidably matched with chute.Guide plate 1 does not directly contact with bimetal leaf 3.Orientation shown in the drawings is below installed and is described, guide plate 1 top is provided with projection 6, and projection 6 is connected with one end of spring 5, and the other end of spring 5 is fixed on support; The flexible direction of spring 5 is parallel with the length direction of guide plate 1.The below of guide plate 1 is provided with compensation sheet metal 9, and the on-fixed end of compensation sheet metal 9 and bimetal leaf 3 is adjacent but do not contact.Compensation sheet metal 9 is positioned at bimetal leaf 3 bending direction one sides, and its material is identical with bimetal leaf.Guide plate 1 two ends are respectively equipped with often closes fixed contact 2 and normal minute fixed contact 8, often divides reset button 7 is installed on fixed contact 8.
For further improving the sensitivity of thermal relay described in the utility model, on bimetal leaf 3, heater element is installed.Conventional heater element is as Si-Mo rod, Elema, molybdenum filament, molybdenum plug, molybdenum electrode, ceramic heating plate, silicon-carbon element and silicon molybdenum element.This heater element is with bimetal leaf 3 access in parallel main circuit.Thermal relay during place in circuit, is not preset with certain distance between compensation sheet metal 9 and bimetal leaf 3, and under the effect of spring 5, guide plate 1 is placed in and often closes on fixed contact 2.In thermal relay place in circuit, start working, bimetal leaf 3 is increased by thermal deformation, when main circuit transships, the temperature of bimetal leaf 3 continues to rise, there is more large deformation in bimetal leaf 3, bimetal leaf 3 tops promote compensation sheet metal 9, guide plate 1 is left and often close fixed contact 2, are placed on normal minute fixed contact 8.After bimetal leaf 3 is cooling, press reset button 7, guide plate 1 is again placed in and often closes on fixed contact 2, realizes and resetting.
Below be only preferred implementation of the present utility model, it should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection range of the present utility model should be as the criterion with claim limited range.For those skilled in the art, within not departing from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims (5)

1. a thermal relay, comprise at least one bimetal leaf (3) and a support, this bimetal leaf (3) one end is fixed on fixed leg (4), on the bearing of trend of bimetal leaf (3) other end, be provided with guide plate (1), guide plate (1) does not directly contact with bimetal leaf (3), it is characterized in that, be provided with chute on support, described guide plate (1) is arranged in chute; Guide plate (1) one side is provided with projection (6), and projection (6) is connected with one end of spring (5), and the other end of spring (5) is fixed on support; The flexible direction of spring (5) is parallel with the length direction of guide plate (1); The opposite side of guide plate (1) is provided with compensation sheet metal (9), compensation sheet metal (9) is adjacent with the on-fixed end of bimetal leaf (3) but do not contact, guide plate (1) two ends are respectively equipped with often closes fixed contact (2) and normal minute fixed contact (8), often divides reset button (7) is installed on fixed contact (8).
2. thermal relay according to claim 1, is characterized in that, described compensation sheet metal (9) is positioned at bimetal leaf (3) bending direction one side.
3. thermal relay according to claim 1, is characterized in that, the material of described compensation sheet metal (9) is identical with bimetal leaf.
4. thermal relay according to claim 1, is characterized in that, described bimetal leaf is provided with heater element on (3).
5. thermal relay according to claim 4, is characterized in that, described heater element is in parallel with bimetal leaf (3).
CN201320564031.0U 2013-09-11 2013-09-11 Electrothermal relay Withdrawn - After Issue CN203503565U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320564031.0U CN203503565U (en) 2013-09-11 2013-09-11 Electrothermal relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320564031.0U CN203503565U (en) 2013-09-11 2013-09-11 Electrothermal relay

Publications (1)

Publication Number Publication Date
CN203503565U true CN203503565U (en) 2014-03-26

Family

ID=50334524

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320564031.0U Withdrawn - After Issue CN203503565U (en) 2013-09-11 2013-09-11 Electrothermal relay

Country Status (1)

Country Link
CN (1) CN203503565U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103489719A (en) * 2013-09-11 2014-01-01 国家电网公司 Thermal relay
CN111508782A (en) * 2020-03-13 2020-08-07 浙江城电电气有限公司 Thermal relay

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103489719A (en) * 2013-09-11 2014-01-01 国家电网公司 Thermal relay
CN103489719B (en) * 2013-09-11 2016-09-21 国家电网公司 A kind of thermorelay
CN111508782A (en) * 2020-03-13 2020-08-07 浙江城电电气有限公司 Thermal relay

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Legal Events

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GR01 Patent grant
GR01 Patent grant
C25 Abandonment of patent right or utility model to avoid double patenting
AV01 Patent right actively abandoned

Granted publication date: 20140326

Effective date of abandoning: 20160921

AV01 Patent right actively abandoned

Granted publication date: 20140326

Effective date of abandoning: 20160921