Relay and method for realizing alarm output with high contact temperature

Abstract

The present invention relates to a relay and method for realizing alarm output when the contact temperature is high, comprising: 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 rod-type upper contact (5) comprises a contact (51) and a conductor metal rod (52); the upper end of the conductor metal rod (52) is fixed with the armature (3), one end is connected to the return spring (4), and the other end is the terminal end of the contact (51); the conductor metal rod (52) is a memory alloy, and the lower end of the contact (51) is the column-type lower contact (6). When the dynamic contact and the static contact are in poor contact or the overcurrent is too large, the relay can send a periodic signal to inform the administrator to perform maintenance.

Description

Technical Field

[0001] The present invention relates to a relay, in particular to a relay and a method for realizing alarm output with high contact temperature. Background Art

[0002] A relay is actually an "automatic switch" that uses a smaller current to control a larger current; therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit.

[0003] An electromagnetic relay consists of an iron core 1, a coil 2, an armature 3, a return spring 4, a rod-type upper contact 5 (moving contact), and a column-type lower contact 6 (stationary contact). When a certain voltage is applied across coil 2, a certain current flows through the coil, generating an electromagnetic effect. The electromagnetic force of armature 3 overcomes the pull of return spring 4, attracting it. This causes the armature 3's moving contact to close with the stationary contact (normally open contact). When coil 2 is de-energized, the electromagnetic attraction disappears, and armature 3 returns to its original position under the reaction force of return spring 4, causing the moving contact to close with the original stationary contact (normally closed contact). This closing and closing process achieves the purpose of conducting and disconnecting the circuit. The relay's "normally open" and "normally closed" contacts can be distinguished as follows: the stationary contact in the disconnected state when the relay coil is not energized is called the "normally open contact," while the stationary contact in the connected state is called the "normally closed contact."

[0004] In some use conditions, the contact temperature of the moving contact and the static contact is too high, but due to the large current, an accident may occur. When the contact temperature of the moving contact and the static contact is high, it will affect the safe operation of the downstream equipment. If this condition is not discovered in time for fixed-point maintenance, it will bring hidden dangers to work.

[0005] The purpose of the present invention is to provide a relay and method for realizing alarm output when the moving contact and the static contact are in poor contact or the overcurrent is too large, which can send a periodic signal through the relay to inform the manager to perform maintenance.

[0006] The object of the present invention is achieved in this way. A relay with a high contact temperature that can realize alarm output includes an iron core, a coil, an armature, a return spring, a rod-type upper contact, and a column-type lower contact; its characteristics are: the rod-type upper contact includes a contact and a conductor metal rod, the upper end of the conductor metal rod is fixed with the armature, one end is connected to the return spring, and the other end is the title contact point, the conductor metal rod is a memory alloy, one end of the conductor metal rod that engages the contact is a curved arc segment composed of the memory alloy, and the lower end of the contact is the column-type lower contact.

[0007] One end of the conductor metal rod engaging the contact point is a curved arc segment made of memory alloy.

[0008] The memory temperature of the memory alloy is selected between 70 degrees and 110 degrees.

[0009] A relay method for realizing alarm output when contact temperature is high is characterized in that: when the moving contact and the static contact are closed and connected, and the current passing through is small, or the contact is good, the temperature is low, and the curved segment of the memory alloy is curved; when the moving contact and the static contact are closed and connected, and the current passing through is large, or the contact is not good, the temperature reaches the temperature point of the memory alloy, the memory alloy reaches the memory temperature, and the curved segment is straight.

[0010] When the temperature of the contact point between the moving contact and the static contact rises to the temperature point of the memory alloy, the moving contact and the static contact are opened and closed, and the cycle is repeated. The circuit detects this cycle signal to realize the transmission of the relay status signal.

[0011] The advantages of the present invention are: since the conductor metal rod 52 is a memory alloy, poor contact of the moving contact or excessive current will cause the temperature of the moving contact to rise, affecting the temperature increase of the conductor metal rod 52. When the temperature rises to the temperature point of the memory alloy, the moving contact and the static contact are disconnected, and the cycle continues. The circuit detects this signal to realize signal transmission and perform different tasks for signal processing.

[0012] The present invention will be further described below with reference to the accompanying drawings of the embodiments.

[0013] Figure 1 Schematic diagram of the closed structure of the moving contact and the static contact according to an embodiment of the present invention;

[0014] Figure 2 It is a schematic diagram of the protection status of the moving contact and the static contact in an embodiment of the present invention.

[0015] In the figure, 1, iron core; 2, coil; 3, armature; 4, return spring; 5, rod-type upper contact; 51, contact; 52, conductor metal rod; 53, curved arc segment; 6, column-type lower contact. DETAILED DESCRIPTION

[0016] like Figure 1 and Figure 2 As shown, the present invention relates to a relay and method for realizing an alarm output by high contact temperature, comprising: 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 rod-type upper contact 5 comprises a contact 51 and a conductive metal rod 52, wherein the upper end of the conductive metal rod 52 is fixed to the armature 3, one end is connected to the return spring 4, and the other end is the terminal end of the contact 51, the conductive metal rod 52 is made of a memory alloy, one end of the conductive metal rod 52 engaging the contact 51 is a curved arc section 53 made of the memory alloy, and the lower end of the contact 51 is the column-type lower contact 6.

[0017] When a certain voltage is applied across coil 2, a certain current flows through coil 2. This generates an electromagnetic effect, causing the armature 3 to overcome the pull of the return spring 4, attracting the armature 3. This in turn closes the armature 3's upper rod-type contact 5 (moving contact) and the lower rod-type contact 6 (stationary contact) (normally open contact). When coil 2 is de-energized, the electromagnetic attraction disappears, and the armature 3 returns to its original position under the reaction force of the return spring 4, closing the upper rod-type contact 5 (moving contact) and the lower rod-type contact 6 (stationary contact) (normally closed contact). This closing and closing cycle achieves the purpose of conducting and disconnecting the circuit. The relay's "normally open" and "normally closed" contacts can be distinguished as follows: the stationary contact, which is in the open state when coil 2 is not energized, is called the "normally open contact"; the stationary contact, which is in the closed state, is called the "normally closed contact."

[0018] The relay completes the switching action through the rod-type upper contact 5 (moving contact) and the column-type lower contact 6 (static contact). Figure 1 and Figure 2 The column-type lower contact 6 constitutes a static contact, and the rod-type upper contact 5 constitutes a moving contact. In the present invention, the rod-type upper contact 5 includes a contact 51 and a conductor metal rod 52. The upper end of the conductor metal rod 52 is fixed to the armature 3, one end is connected to the return spring 4, and the other end is the end title contact 51. The conductor metal rod 52 is a memory alloy. One end of the conductor metal rod 52 engages the contact 51 and is a curved segment 53 composed of a memory alloy. When the moving contact and the static contact are closed and connected, and when the current is small, or the contact is good, the temperature is low, and the memory alloy curved segment 53 is curved as shown. Figure 1 When the moving contact and the static contact are closed and connected, and when the current is large, or the contact is not good, the temperature reaches the memory alloy temperature point, the memory alloy reaches the memory temperature, and the arc segment 53 is in a straight line state, as shown Figure 2 shown.

[0019] When the temperature of the contact point between the moving contact and the static contact rises to the temperature point of the memory alloy, the moving contact and the static contact are opened and closed, and the cycle is repeated. The circuit detects this cycle signal to realize the transmission of the relay status signal.

[0020] The memory temperature of the memory alloy is selected according to the nature of the work, and the temperature is between 70 degrees and 110 degrees.

Claims

1. Relays with high contact temperature alarm output, including: 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 rod-type upper contact (5) comprises a contact (51) and a conductor metal rod (52); the upper end of the conductor metal rod (52) is fixed with the armature (3), one end is connected to the return spring (4), and the other end is the end title contact (51); the conductor metal rod (52) is a memory alloy, and the lower end of the contact (51) is the column-type lower contact (6); one end of the conductor metal rod (52) that engages the contact (51) is a curved arc section (53) composed of a memory alloy; and the memory temperature of the memory alloy is selected between 70 degrees and 110 degrees.

2. A relay method for realizing alarm output when the contact temperature is high, characterized by: Based on the iron core (1), coil (2), armature (3), return spring (4) and rod-type upper contact (5) in the relay with high contact temperature for realizing alarm output, the rod-type upper contact (5) includes a contact (51) and a conductor metal rod (52), the upper end of the conductor metal rod (52) is fixed with the armature (3), one end is connected to the return spring (4), and the other end is the title contact point (51), and the conductor metal rod (52) is a memory alloy; when the moving contact and the static contact are closed and connected, and when the current passing through is small or the contact is good, the temperature is low, and the memory alloy curved section (53) is curved; When the moving contact and the static contact are closed and a large current flows through them, and the contact is not good, the temperature reaches the temperature point of the memory alloy, the memory alloy reaches the memory temperature, and the curved arc segment (53) is in a straight line state.

3. The relay method for realizing alarm output with high contact temperature according to claim 2, characterized in that: When the temperature of the contact point between the moving contact and the static contact rises to the temperature point of the memory alloy, the moving contact and the static contact are opened and closed, and the cycle is repeated. The detection of this cycle signal realizes the transmission of the relay status signal.

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