A multifunctional time logic relay

Abstract

The present invention discloses a multifunctional time logic relay, comprising: a time logic relay KT-A body, the time logic relay KT-A body comprising a contactor KM and a logic control module; the time logic relay KT-A body comprising a normally open contact; the working power supply of the time logic relay KT body is taken from the control power supply side, and the normally open contact is connected in parallel to the two ends of the self-holding contact of the contactor KM; a stop button SB1 is arranged between the start button SB2 and the working power supply side of the time logic relay KT body; when the stop button SB1 is pressed, the contactor KM coil loses power and is released, and the contactor KM self-holding contact is disconnected, and the contact of the time logic relay KT-A body is disconnected synchronously, then after the stop button SB1 is reset, the contactor KM coil remains not energized again. It can avoid the safety hazard that the traditional time relay cannot be shut down immediately. It can achieve the multifunctional effects of instantaneous closing, delayed opening, and delayed closing, instantaneous opening.

Description

Technical Field

[0001] The present application relates to the technical field of relay devices, and in particular to a multifunctional time logic relay. Background Art

[0002] Currently, there are two functional forms of time relays: power-on delay and power-off delay, which mainly realize the delayed output contact when the time relay coil is energized or de-energized to meet the requirements of electrical control.

[0003] When the time relay adopts the passive type, that is, the delay action is on or off, this is applied to the normal steady-state operation of the power supply, and there is no logic judgment function of voltage detection. For some working conditions, it can only solve one problem, but will derive another problem. Please refer to the attached figure of the instruction manual Figure 1 , the time relay KT is connected in parallel at both ends of the contactor KM coil. When the start button is pressed, the contactor KM and the time relay KT coil are energized and attracted, the normally open contact of the contactor KM is closed, and the normally open contact of the time relay KT is also closed.

[0004] When the voltage drops and then recovers instantly, the contactor coil is released because the voltage drops to the minimum pull-in voltage, and the time relay KT coil is also released because the voltage reaches the release voltage, but a pair of delayed opening contacts of the time relay KT are connected in parallel on both sides of the contactor self-holding contact contactor KM. When the normally open contact of the contactor KM is disconnected, the contact of the time relay KT is delayed to disconnect and is still not closed. When the voltage returns to normal instantly, since the contact of the time relay KT is in a closed state, the contactor KM coil and the time relay KT coil are energized at the same time, and the contactor KM self-holding normally open contact is closed, and enters steady-state operation again. At this time, the role of the time relay KT is to keep the contactor KM coil self-holding circuit closed when the voltage drops instantly, and when the voltage recovers, the contactor KM coil is connected to energize.

[0005] However, during manual normal parking, when the stop button is pressed, the contactor KM and the time relay KT coil lose power at the same time. However, since the normally open contact of the time relay KT is delayed in opening, although the contactor KM coil loses power and is released, the self-holding circuit of the contactor KM is still in a closed state. When the stop button is pressed and bounces back, the contactor KM coil is energized again and closed, which will cause the manual parking to fail. When the stop button is pressed and released, the motor will still run again due to the closure of the contactor KM and cannot be stopped in an emergency, which will create a safety hazard. Summary of the invention

[0006] The present invention mainly aims at the above problems and proposes a multifunctional time logic relay, aiming to solve the technical problems in the background technology.

[0007] To achieve the above object, the present invention provides a multifunctional time logic relay, comprising: A time logic relay KT-A body, the time logic relay KT-A body includes a contactor KM and a logic control module; the time logic relay KT-A body includes a normally open contact; the working power supply of the time logic relay KT-A body includes an internal energy storage power supply and a control power supply; the internal energy storage power supply inlet side is taken from the control power supply side, and the coil of the KT-A body is connected to the internal energy storage power supply; the normally open contact of the time logic relay KT-A body is connected in parallel to both ends of the self-holding contact of the contactor KM; The main switch QF1 is connected to both ends of the contact of the time logic relay KT-A body; when the main switch QF1 is closed, the time logic relay KT-A body is energized, and the normally open contact of the time logic relay KT-A body remains in an open state; A start button SB2, one end of which is connected to the working power supply side of the time logic relay KT body, and the other end is connected to another contact of the time logic relay KT-A body; when the start button SB2 is pressed, the contactor KM coil is energized, and the contactor KM self-holding contact is closed, and the time logic relay KT-A body performs time-delay closing or instantaneous closing of the time logic relay KT-A body's normally open contact that can be adjusted in time according to the detected closing information of the contactor KM contact; Stop button SB1, the stop button SB1 is arranged between the start button SB2 and the working power supply side of the time logic relay KT body; when the stop button SB1 is pressed, the contactor KM coil loses power and is released, and the contactor KM self-holding contact is disconnected, and the contact of the time logic relay KT-A body is disconnected synchronously, then after the stop button SB1 is reset, the contactor KM coil is not energized again; When the logic control module detects that the voltage on the power supply side is instantly reduced, causing the KM coil to be released, the normally open contact of the contactor KM is controlled to be disconnected, and the time logic relay KT-A body is kept in a closed state before no closing information of the contactor KM coil is detected within a first preset time; When the power supply is instantaneously restored to the lowest closing value of the contactor KM coil, the contactor KM coil is energized to close the self-holding circuit and restore the closed state.

[0008] Furthermore, if the logic control module does not detect the closing information of the contactor KM coil within the first preset time, the contacts of the time logic relay KT-A body will be disconnected immediately; if the logic control module detects that the power supply is restored to the preset voltage threshold within the second preset time, the time logic relay KT-A body will be in a delayed closing state, and the contactor KM coil will delay power-on and the self-holding circuit will resume the closed state.

[0009] Furthermore, if the logic control module detects that the power supply has not recovered to the preset voltage threshold within the second preset time, the time logic relay KT-A body is in an unclosed state, and the contactor KM coil is not energized again.

[0010] Furthermore, it includes a backup power supply module, which is electrically connected to the logic control module and is used to power the multifunctional time logic relay according to the control instructions of the logic control module when the external power supply loses voltage or is undervoltage instantaneously.

[0011] Compared with the prior art, the multifunctional time logic relay provided by the present invention can avoid the safety hazard of the traditional time relay not being able to shut down immediately. Therefore, it can achieve the multifunctional effects of instantaneous closing, delayed opening, delayed closing, instant opening, etc.; it effectively solves the defects existing in the prior art, and the improved relay usage and wiring structure are roughly the same as the previous method, so there is no additional wiring and usage changes, which conforms to the user's regular usage habits and effectively avoids the safety hazard of ineffective manual emergency shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a wiring schematic diagram of a time relay applied to a circuit in the prior art.

[0013] Figure 2 This is a wiring schematic diagram of an embodiment of a multifunctional time logic relay of the present application. DETAILED DESCRIPTION

[0014] Please refer to Figure 2 , this embodiment provides a multifunctional time logic relay, including: A time logic relay KT-A body, the time logic relay KT-A body includes a contactor KM and a logic control module; the time logic relay KT-A body includes a normally open contact; the working power supply of the time logic relay KT-A body includes an internal energy storage power supply and a control power supply; the internal energy storage power supply inlet side is taken from the control power supply side, and the coil of the KT-A body is connected to the internal energy storage power supply; the normally open contact of the time logic relay KT-A body is connected in parallel to both ends of the self-holding contact of the contactor KM; The main switch QF1 is connected to both ends of the contact of the time logic relay KT-A body; when the main switch QF1 is closed, the time logic relay KT-A body is energized, and the normally open contact of the time logic relay KT-A body remains in an open state; A start button SB2, one end of which is connected to the working power supply side of the time logic relay KT body, and the other end is connected to another contact of the time logic relay KT-A body; when the start button SB2 is pressed, the contactor KM coil is energized, and the contactor KM self-holding contact is closed, and the time logic relay KT-A body performs time-delay closing or instantaneous closing of the time logic relay KT-A body's normally open contact that can be adjusted in time according to the detected closing information of the contactor KM contact; Among them, when the logic control module detects that the voltage on the power supply side drops momentarily, causing the KM coil to be released, the normally open contact of the contactor KM is controlled to be disconnected, and the time logic relay KT-A body is kept in a closed state until the closing information of the contactor KM coil is not detected within the first preset time; when KM is disconnected due to a momentary voltage drop, KT can still remain closed, so that the purpose of automatic closure of the KM coil can be achieved after the power supply is restored.

[0015] When the power supply is instantaneously restored to the lowest closing value of the contactor KM coil, the contactor KM coil is energized to close the self-holding circuit and restore the closed state.

[0016] Stop button SB1, the stop button SB1 is arranged between the start button SB2 and the working power supply side of the time logic relay KT body; when the stop button SB1 is pressed, the contactor KM coil loses power and is released, and the contactor KM self-holding contact is disconnected, and the contact of the time logic relay KT-A body is disconnected synchronously, then after the stop button SB1 is reset, the contactor KM coil is not energized again; the motor using this multifunctional time logic relay stops normally, thus avoiding the safety hazard of the traditional time relay not being able to stop immediately. Therefore, the multifunctional effects of instantaneous closing and delayed opening, delayed closing and instantaneous opening can be achieved. Both transient and steady states are taken into account.

[0017] New circuit symbols for instantaneous closing and delayed opening, and delayed closing and instantaneous opening.

[0018] Furthermore, if the logic control module does not detect the closing information of the contactor KM coil within the first preset time, the contacts of the time logic relay KT-A body will be disconnected immediately; if the logic control module detects that the power supply is restored to the preset voltage threshold within the second preset time, the time logic relay KT-A body will be in a delayed closing state, and the contactor KM coil will delay power-on and the self-holding circuit will resume the closed state.

[0019] Furthermore, if the logic control module detects that the power supply has not recovered to the preset voltage threshold within the second preset time, the time logic relay KT-A body is in an unclosed state, and the contactor KM coil is not energized again.

[0020] In summary, the entire control logic is: 1. The main switch QF1 is energized, and the time logic relay KT-A is not closed. 2. The contactor KM is closed, and the time logic relay KT-A is closed without closing. 3. The contactor KM is manually released, and the time logic relay KT-A is not closed and is released synchronously. 4. The contactor KM is released due to a momentary reduction in the power supply side, and the time logic relay KT-A is not closed and delayed to release. The power supply is restored to the contactor KM coil attraction value in time to close the contactor KM. 5. The contactor KM is not closed within the first preset time, and the time logic relay KT-A is not closed and released instantly. 6. The power supply is detected to be restored within the second preset time, and the time logic relay KT-A is not closed and delayed to close. 7. If the power supply does not return to the preset value within the second preset time, the time logic relay KT-A is not closed and opens instantly.

[0021] The multi-configuration control logic of the time logic relay KT-A, which is not closed, can be closed instantly, opened with a delay, and closed with a delay, opened instantly. It can meet the needs and realize multi-functions far better than the single control mode function of the original passive time relay.

[0022] It is worth noting that within the first preset time, if the time logic relay KT-A is not closed, it does not detect whether the power supply voltage has returned to normal, but detects whether the KM coil is closed to determine whether the power supply has returned to normal. Within the second preset time, if the time logic relay KT-A is not closed, it is necessary to detect whether the power supply voltage has returned to a preset threshold value, preferably in the range of 80-100% of the rated voltage, before deciding whether to delay issuing a closing instruction for the time logic relay KT-A.

[0023] How to detect the closing information of the contactor KM coil can be achieved using existing technology and will not be described in detail here.

[0024] Furthermore, it includes a backup power supply module, which is electrically connected to the logic control module and is used to power the multifunctional time logic relay according to the control instructions of the logic control module when the external power supply loses voltage or is undervoltage instantaneously.

[0025] The technology of the present application effectively solves the defects existing in the prior art. The improved relay usage and wiring structure are roughly the same as the previous method, so there is no additional wiring and usage changes, which conforms to the user's regular usage habits and effectively avoids the safety hazard of ineffective manual emergency shutdown.

Claims

1. A multifunctional time logic relay, characterized in that: include: A time logic relay KT-A body, wherein the time logic relay KT-A body comprises a contactor KM and a logic control module; The time logic relay KT-A body includes a normally open contact; the working power supply of the time logic relay KT-A body includes an internal energy storage power supply and a control power supply; the internal energy storage power supply input line side is taken from the control power supply side, and the coil of the time logic relay KT-A body is connected to the internal energy storage power supply; the normally open contact of the time logic relay KT-A body is connected in parallel to the two ends of the self-holding contact of the contactor KM; The main switch QF1 is connected to both ends of the contact of the time logic relay KT-A body; when the main switch QF1 is closed, the time logic relay KT-A body is energized, and the normally open contact of the time logic relay KT-A body remains in an open state; A start button SB2, one end of which is connected to the coil side of the time logic relay KT-A body, and the other end is connected to another contact of the time logic relay KT-A body; when the start button SB2 is pressed, the contactor KM coil is energized, and the contactor KM self-holding contact is closed, and the time logic relay KT-A body performs a time-delayed closing or instantaneous closing of the normally open contact of the time logic relay KT-A body that can be adjusted in time according to the detected closing information of the contactor KM contact; Stop button SB1, the stop button SB1 is arranged between the start button SB2 and the working power supply side of the time logic relay KT body; when the stop button SB1 is pressed, the contactor KM coil loses power and is released, and the contactor KM self-holding contact is disconnected, and the contact of the time logic relay KT-A body is disconnected synchronously, then after the stop button SB1 is reset, the contactor KM coil is not energized again; When the logic control module detects that the voltage on the power supply side is instantly reduced, causing the KM coil to be released, the normally open contact of the contactor KM is controlled to be disconnected, and the time logic relay KT-A body is kept in a closed state before no closing information of the contactor KM coil is detected within a first preset time; When the power supply is instantaneously restored to the lowest closing value of the contactor KM coil, the contactor KM coil is energized to close the self-holding circuit and restore the closed state.

2. A multifunctional time logic relay according to claim 1, characterized in that: If the logic control module does not detect the closing information of the contactor KM coil within the first preset time, the contacts of the time logic relay KT-A body will be disconnected immediately; if the logic control module detects that the power supply is restored to the preset voltage threshold within the second preset time, the time logic relay KT-A body will be in a delayed closing state, and the contactor KM coil will delay power-on and the self-holding circuit will resume the closed state.

3. A multifunctional time logic relay according to claim 1, characterized in that: If the logic control module detects that the power supply has not recovered to the preset voltage threshold within the second preset time, the time logic relay KT-A body is in an unclosed state, and the contactor KM coil is not energized again.

4. A multifunctional time logic relay according to claim 1, characterized in that: It includes a backup power supply module, which is electrically connected to the logic control module and is used to supply power to the multifunctional time logic relay according to the control instruction of the logic control module when the external power supply loses voltage or is undervoltage instantaneously.

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