CN205406437U - A thermal relay - Google Patents

A thermal relay Download PDF

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Publication number
CN205406437U
CN205406437U CN201620128449.0U CN201620128449U CN205406437U CN 205406437 U CN205406437 U CN 205406437U CN 201620128449 U CN201620128449 U CN 201620128449U CN 205406437 U CN205406437 U CN 205406437U
Authority
CN
China
Prior art keywords
moving contact
push rod
bimetal leaf
thermorelay
bimetallic strip
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
CN201620128449.0U
Other languages
Chinese (zh)
Inventor
曹立杰
臧金枝
王楠
王志国
李宝军
李小虎
孙海涛
张广义
苏娟
马国文
董长荣
凌江川
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
Anqiu Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Anqiu Power Supply Co of State Grid Shandong 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, Anqiu Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201620128449.0U priority Critical patent/CN205406437U/en
Application granted granted Critical
Publication of CN205406437U publication Critical patent/CN205406437U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a thermal relay, including insulating casing, be provided with at least a set of bimetallic strip in the insulating casing, bimetallic strip is equipped with heating element last adhering to, bimetallic strip's bottom is provided with the baffle, the one end of baffle with bimetallic strip is connected, the other end of baffle is connected with the temperature compensating piece, the temperature compensating piece is connected with the push rod, the push rod tip is equipped with the moving contact, moving contact swing joint has the static contact, the side upper portion of moving contact is equipped with reset button, reset button installs the screw that resets in the bottom, the push rod is kept away from the one end of moving contact articulates and is equipped with branch, the top of branch is equipped with electric current adjustment cam, the push rod is close to the one end of moving contact is equipped with reset spring. The utility model has the advantages that the whole structure is simple it is single, the low price, it is in extensive range to delay, is favorable to ac motor's the overload protection loss of phase and the protection of the uneven motion of electric current.

Description

Thermorelay
Technical field
This utility model relates to power equipment technical field, particularly relates to a kind of thermorelay.
Background technology
nullThermorelay is mainly used in the overload and open-phase protection of motor,Its operation principle mainly flow through the electric current in motor excessive time,When electric current is by after thermal element,Make bimetal leaf bending in thermorelay,Pushing action mechanism is thus driving moving contact action in thermorelay,Thus the control circuit of motor is cut off,Make motor out of service,Play motor overload protection effect,Utilize the low-voltage variation electrical equipment that heating effect of current principle is made,It it is motor overload protection element,It has simple in construction、Volume is little、The advantage such as easy to use,And normal and catalyst is used in conjunction with each other the open-phase protection in three-phase alternating-current motor and overload protection,Owing to thermorelay selects the unreasonable situation causing motor to burn also often to occur in real work,Therefore select rational thermorelay that overload protection and the open-phase running of motor are had extraordinary effect.For this, it is proposed that a kind of thermorelay structure.
Utility model content
Technical problem to be solved in the utility model is to provide one, and volume is little, cost is low, and I&M is convenient, stable and reliable for performance, has the thermorelay of significant market prospect in the overload protection of motor.
For solving above-mentioned technical problem, the technical solution of the utility model is: thermorelay, including insulation crust, least one set bimetal leaf it is provided with in described insulation crust, on described bimetal leaf, attachment is provided with heating element heater, the bottom of described bimetal leaf is provided with guide plate, one end of described guide plate is connected with described bimetal leaf, the other end of described guide plate is connected to temperature-compensating sheet, described temperature-compensating sheet is connected to push rod, described push rod end is provided with moving contact, described moving contact is connected with static contact, the upper lateral part of described moving contact is provided with SR, reset screw is installed bottom described SR;Described push rod is provided with pole away from one end of described moving contact is hinged, and the top of described pole is provided with electric current adjustment cam, and described push rod is provided with back-moving spring near one end of described moving contact.
As preferred technical scheme, described heating element heater is wound on the sidewall of described bimetal leaf twist.
As the improvement to technique scheme, the L-shaped structure of described push rod.
Being connected with described push rod as the improvement to technique scheme, the " T " shape structure of described moving contact, and the top of described moving contact, the bottom of described moving contact is connected with described reset screw.
Owing to have employed technique scheme, thermorelay, including insulation crust, least one set bimetal leaf it is provided with in described insulation crust, on described bimetal leaf, attachment is provided with heating element heater, the bottom of described bimetal leaf is provided with guide plate, one end of described guide plate is connected with described bimetal leaf, the other end of described guide plate is connected to temperature-compensating sheet, described temperature-compensating sheet is connected to push rod, described push rod end is provided with moving contact, described moving contact is connected with static contact, the upper lateral part of described moving contact is provided with SR, reset screw is installed bottom described SR;Described push rod is provided with pole away from one end of described moving contact is hinged, and the top of described pole is provided with electric current adjustment cam, and described push rod is provided with back-moving spring near one end of described moving contact;This utility model has the advantages that overall structure is simple; cheap; reference time delay is extensive; the design generated heat by bimetal leaf is utilized the coefficient of expansion different and causes the effect of open circuit thus reaching the purpose of power-off protection; and the size of temperature-compensating sheet can be regulated to adjust the power cut off delay time of relay; be conducive to the disconnected phase of overload protection of ac motor and the control of the protection of current imbalance motion and other electric equipment febrile states; slow down the aging of the insulation of motor, greatly reduce the possibility burning motor.
Accompanying drawing explanation
The following drawings is only intended to, in this utility model being schematically illustrated and explaining, not limit scope of the present utility model.Wherein:
Fig. 1 is the structural representation of this utility model embodiment;
In figure: 1-insulation crust;2-bimetal leaf;3-heating element heater;4-guide plate;5-temperature-compensating sheet;6-push rod;7-moving contact;8-static contact;9-SR;10-reset screw;11-pole;12-electric current adjustment cam;13-back-moving spring.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is expanded on further.In the following detailed description, only some one exemplary embodiment of the present utility model is described by the mode of explanation.Undoubtedly, those of ordinary skill in the art will be consequently realised that, when not necessarily departing from spirit and scope of the present utility model, it is possible to by various different modes, described embodiment is modified.Therefore, accompanying drawing and description are inherently illustrative, rather than are used for limiting scope of the claims.
As shown in Figure 1, thermorelay, including insulation crust 1, it is provided with least one set bimetal leaf 2 in described insulation crust 1, on described bimetal leaf 2, attachment is provided with heating element heater 3, the bottom of described bimetal leaf 2 is provided with guide plate 4, one end of described guide plate 4 is connected with described bimetal leaf 2, the other end of described guide plate 4 is connected to temperature-compensating sheet 5, described temperature-compensating sheet 5 is connected to push rod 6, the L-shaped structure of described push rod, described push rod 6 end is provided with moving contact 7, described moving contact 7 is connected with static contact 8, the upper lateral part of described moving contact 7 is provided with SR 9, bottom described SR 9, reset screw 10 is installed;Described push rod 6 is provided with pole 11 away from one end of described moving contact 7 is hinged, and the top of described pole 11 is provided with electric current adjustment cam 12, and described push rod 6 is provided with back-moving spring 13 near one end of described moving contact 7.
The coefficient of expansion for ensureing bimetal leaf 2 is stable, reliable, and described heating element heater 3 is wound on the sidewall of described bimetal leaf 2 twist.
It addition, in order to make moving contact 7 reliable in action, described moving contact 7 is preferably provided " T " shape structure, and the top of described moving contact 7 is connected with described push rod 6, and the bottom of described moving contact 7 is connected with described reset screw 10.
Operation principle of the present utility model is as follows: bimetal leaf 2 is to be formed by the sheet metal seam that two kinds of thermal coefficient of expansions are different, directly being serially connected on the quarter-phase circuit of asynchronous motor by resistance wire (heating element heater) during use, normally closed interlock is connected on the contactor coil branch road of electromotor control circuit.When motor winding causes overcurrent because of overload; and after certain time; produced by heating element heater, heat foot makes bimetal leaf 2 bend; and promote guide plate 4 to move right certain distance; guide plate 4 promotes again temperature-compensating sheet 5 and push rod 6, makes moving contact 7 separate with static contact 8, so that motor line catalyst power-off release; by dump, play a protective role.After dump, thermorelay begins to cool down, and bimetallic 2 restores to the original state after a while, and then moving contact 7 is under the use of back-moving spring 13, automatically resets and static contact 8 closes.
The foregoing is only the schematic detailed description of the invention of this utility model, be not limited to scope of the present utility model.Any those skilled in the art, equivalent variations done under the premise without departing from design of the present utility model and principle and amendment, all should belong to the scope of this utility model protection.

Claims (4)

1. thermorelay, including insulation crust, it is characterized in that: in described insulation crust, be provided with least one set bimetal leaf, on described bimetal leaf, attachment is provided with heating element heater, the bottom of described bimetal leaf is provided with guide plate, one end of described guide plate is connected with described bimetal leaf, the other end of described guide plate is connected to temperature-compensating sheet, described temperature-compensating sheet is connected to push rod, described push rod end is provided with moving contact, described moving contact is connected with static contact, and the upper lateral part of described moving contact is provided with SR, is provided with reset screw bottom described SR;Described push rod is provided with pole away from one end of described moving contact is hinged, and the top of described pole is provided with electric current adjustment cam, and described push rod is provided with back-moving spring near one end of described moving contact.
2. thermorelay as claimed in claim 1, it is characterised in that: described heating element heater is wound on the sidewall of described bimetal leaf twist.
3. thermorelay as claimed in claim 2, it is characterised in that: the L-shaped structure of described push rod.
4. thermorelay as claimed in claim 3, it is characterised in that: the " T " shape structure of described moving contact, and the top of described moving contact is connected with described push rod, the bottom of described moving contact is connected with described reset screw.
CN201620128449.0U 2016-02-19 2016-02-19 A thermal relay Expired - Fee Related CN205406437U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620128449.0U CN205406437U (en) 2016-02-19 2016-02-19 A thermal relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620128449.0U CN205406437U (en) 2016-02-19 2016-02-19 A thermal relay

Publications (1)

Publication Number Publication Date
CN205406437U true CN205406437U (en) 2016-07-27

Family

ID=56447862

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620128449.0U Expired - Fee Related CN205406437U (en) 2016-02-19 2016-02-19 A thermal relay

Country Status (1)

Country Link
CN (1) CN205406437U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106449282A (en) * 2016-10-22 2017-02-22 钟贵洪 Thermal relay structure
CN107204260A (en) * 2017-06-08 2017-09-26 无锡市飞沪科技有限公司 A kind of electrothermal relay with automatic protection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106449282A (en) * 2016-10-22 2017-02-22 钟贵洪 Thermal relay structure
CN107204260A (en) * 2017-06-08 2017-09-26 无锡市飞沪科技有限公司 A kind of electrothermal relay with automatic protection

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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: 20160727

Termination date: 20170219