CN209929232U

CN209929232U - Relay with high contact temperature for realizing alarm output

Info

Publication number: CN209929232U
Application number: CN201920777377.6U
Authority: CN
Inventors: 刘明; 杨军; 邱红蕴; 刘艳; 曾明刚; 谢明军; 蒋晓凡; 郑淇匀
Original assignee: Xian Railway Signal Co Ltd
Current assignee: Xian Railway Signal Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-01-10
Anticipated expiration: 2029-05-28

Abstract

The utility model relates to a relay with high realization alarm output of contact temperature, include: the magnetic control device comprises an iron core (1), a coil (2), an armature (3), a return spring (4), a rod type upper contact (5) and a column type lower contact (6); the method is characterized in that: the rod-type upper contact (5) comprises a contact (51) and a conductor metal rod (52), an armature (3) is fixed at the upper end in the middle of the conductor metal rod (52), one end of the armature is connected with the return reed (4), the other end of the armature is connected with the contact (51), the conductor metal rod (52) is made of memory alloy, and the lower end of the contact (51) is a column-type lower contact (6). When the contact of the movable contact and the fixed contact is poor or the overcurrent is too large, the relay with the high contact temperature alarm output can send periodic signals to inform an administrator of maintenance.

Description

Relay with high contact temperature for realizing alarm output

Technical Field

The utility model relates to a relay, especially have the relay that the high warning output of realization of contact temperature.

Background

Relays are actually an "automatic switch" that uses a small current to control a large current; therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The electromagnetic relay includes: the magnetic circuit comprises an iron core 1, a coil 2, an armature 3, a return reed 4, a rod-type upper contact 5 (a movable contact) and a column-type lower contact 6 (a static contact), wherein a certain current flows in the coil as long as a certain voltage is applied to two ends of the coil 2, so that an electromagnetic effect is generated, the armature 3 overcomes the pulling force of the return spring 4 to attract the armature 3 under the action of electromagnetic force attraction, so that the movable contact of the armature 3 is driven to attract with the static contact (a normally open contact), when the coil 2 is powered off, the electromagnetic attraction disappears, the armature 3 returns to the original position under the reaction force of the return spring 4, and the movable contact is attracted with the original static contact (a normally closed contact); the actuation and the release are carried out, so that the purposes of conduction and cut-off in the circuit are achieved, and the normally open and normally closed contacts of the relay can be distinguished as follows: the static contact which is in an off state when the relay coil is not electrified is called as a normally open contact; the stationary contact in the on state is referred to as a "normally closed contact".

Some are under the user state, and movable contact and stationary contact temperature are too high, but because the electric current is too big, can meet accident, and when movable contact and stationary contact temperature were high, can influence the safe operation of lower extreme equipment, if this kind of state can not in time discover to carry out the fixed point and maintain, can bring the work hidden danger.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a when movable contact and stationary contact failure, or overflow when too big, can send periodic signal through the relay and tell the administrator to maintain have the relay that the high realization of contact temperature was reported to the police and is exported.

The utility model aims at realizing the purpose, and relates to a relay with high contact temperature and alarm output, which comprises an iron core, a coil, an armature, a return reed, a rod-type upper contact and a column-type lower contact; the method is characterized in that: the rod type upper contact comprises a contact and a conductor metal rod, an armature is fixed at the upper end in the middle of the conductor metal rod, one end of the armature is connected with the return spring, the other end of the armature is connected with the contact, the conductor metal rod is made of memory alloy, one end of the conductor metal rod, which is connected with the contact, is a curved arc section formed by the memory alloy, and the lower end of the contact is a column type lower contact.

One end of the conductor metal rod, which is connected with the contact, is a bent arc section formed by memory alloy.

The memory temperature of the memory alloy is selected between 70 and 110 degrees.

The utility model has the advantages that: because the conductor metal rod 52 is made of memory alloy, the temperature of the movable contact can be increased when the contact of the movable contact is not good or the current is too large, the temperature increase of the conductor metal rod 52 is influenced, when the temperature is increased to the temperature point of the memory alloy, the movable contact and the fixed contact are disconnected, and the circuit detects the signal to realize signal transmission and realize different tasks for signal processing.

Drawings

The invention will be further explained with reference to the drawings of the embodiments.

FIG. 1 is a schematic diagram of a closed structure of a movable contact and a stationary contact according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the protection state of the moving contact and the stationary contact according to the embodiment of the present invention.

In the figure, 1, iron core; 2. a coil; 3. an armature; 4. returning the reed; 5. a rod-type upper contact; 51. a contact; 52. a conductor metal rod; 53. bending an arc section; 6. a pillar lower contact.

Detailed Description

As shown in fig. 1 and 2, the utility model belongs to have high relay that realizes alarm output of contact temperature, include: the magnetic core comprises an iron core 1, a coil 2, an armature 3, a return reed 4, a rod type upper contact 5 and a column type lower contact 6; the method is characterized in that: the rod-type upper contact 5 comprises a contact 51 and a conductor metal rod 52, the armature 3 is fixed at the upper end in the middle of the conductor metal rod 52, one end of the armature is connected with the return spring 4, the end head of the other end of the armature is connected with the contact 51, the conductor metal rod 52 is made of memory alloy, one end of the conductor metal rod 52 connected with the contact 51 is a bent arc section 53 made of memory alloy, and the lower end of the contact 51 is a column-type lower contact 6.

As long as certain voltage is applied to two ends of the coil 2, a certain current flows through the coil 2 to generate an electromagnetic effect, and the armature 3 overcomes the pulling force of the return spring 4 to attract the armature 3 under the action of electromagnetic attraction, so that the rod-type upper contact 5 (movable contact) of the armature 3 is driven, and the column-type lower contact 6 (fixed contact) (normally open contact) is attracted; when the coil 2 is powered off, the electromagnetic attraction force disappears, the armature 3 returns to the original position under the counterforce of the return spring 4, and the rod-type upper contact 5 (movable contact) and the column-type lower contact 6 (static contact) (normally closed contact) are attracted; thus, the circuit is attracted and released, thereby achieving the purposes of conduction and cut-off in the circuit. For the "normally open, normally closed" contacts of a relay, a distinction can be made: a stationary contact in an off state when the relay coil 2 is not energized is called a "normally open contact"; the stationary contact in the on state is referred to as a "normally closed contact".

The relay completes the switch action through the pole type upper contact 5 (movable contact) and the pole type lower contact 6 (fixed contact), the pole type lower contact 6 in figure 1 and figure 2 constitutes the fixed contact, the pole type upper contact 5 constitutes the movable contact, the utility model discloses a, the pole type upper contact 5 includes contact 51 and conductor metal pole 52, the fixed armature 3 of upper end in the middle of the conductor metal pole 52, one end is connected with the return reed 4, the end of the other end links up the contact 51, the conductor metal pole 52 is the memory alloy, one end that the conductor metal pole 52 links up the contact 51 is the curved arc section 53 that the memory alloy constitutes, when the movable contact is connected with the fixed contact closure, and when passing current is hour, or when contacting well, the temperature is lower, the curved arc section 53 of the memory alloy is curved arc like figure 1; when the movable contact is connected with the fixed contact in a closed manner, and when the passing current is large or the contact is poor, the temperature reaches the temperature point of the memory alloy, the memory alloy reaches the memory temperature, and the bent arc section 53 is in a linear state as shown in fig. 2.

When the temperature of the contact point of the movable contact and the fixed contact rises to the temperature point of the memory alloy, the movable contact and the fixed contact are disconnected and closed, and the circuit detects the circulating signal to realize the state signal transmission of the relay.

The memory temperature of the memory alloy is different according to the working property, and different memory temperature alloys are selected, and the temperature is between 70 and 110 ℃.

Claims

1. The relay with high contact temperature realizes warning output includes: the magnetic control device comprises an iron core (1), a coil (2), an armature (3), a return spring (4), a rod type upper contact (5) and a column type lower contact (6); the method is characterized in that: the rod type upper contact (5) comprises a contact (51) and a conductor metal rod (52), an armature (3) is fixed at the upper end in the middle of the conductor metal rod (52), one end of the armature is connected with the return reed (4), the end head of the other end of the armature is connected with the contact (51), the conductor metal rod (52) is made of memory alloy, and the lower end of the contact (51) is a column type lower contact (6).

2. The relay with high contact temperature alarm output of claim 1, wherein: one end of the conductor metal rod (52) connected with the contact (51) is a bent arc section (53) formed by memory alloy.

3. The relay with high contact temperature alarm output of claim 1, wherein: the memory temperature of the memory alloy is selected between 70 and 110 degrees.