Multifunctional time logic relay
By designing a multifunctional time logic relay, using logic control modules and internal energy storage power, the safety hazards of traditional time relays during voltage fluctuations are solved, and the contactor is stable control and normal shutdown is achieved.
Patent Information
- Application Number
- CN202422483546.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-15
AI Technical Summary
When the voltage of the traditional time relay instantly decreases and recovers, it cannot effectively control the status of the contactor, resulting in manual shutdown and failure, causing safety hazards.
A multifunctional time logic relay is designed, including a contactor, a logic control module and an internal energy storage power supply. The logic control module detects the power voltage changes and the contact status to realize delay closure and instantaneous closure of the contacts, and combined with the backup power module to provide power support when the power supply is out of voltage.
It effectively avoids the safety hazards of traditional time relays, realizes stable control of the contactor, ensures that the motor can shut down normally when voltage fluctuates, and avoids the risk of manual emergency shutdown.
Smart Images
Figure CN223308921U_ABST
Abstract
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 delay 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, which 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 momentarily and then recovers momentarily, 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. However, a pair of delayed-open contacts of the time relay KT are connected in parallel on both sides of the contactor's self-holding contact, contactor KM. When the normally open contact of contactor KM is disconnected, the contact of time relay KT is delayed and disconnected, and is still not closed. When the voltage returns to normal momentarily, since the contact of time relay KT is closed, 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 self-holding circuit of the contactor KM coil closed when the voltage drops momentarily, and to connect the contactor KM coil to energize it when the voltage recovers.
[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 to open, although the contactor KM coil loses power and is released, the self-holding circuit of the contactor KM is still in the 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 closed contactor KM and cannot be shut down in an emergency, which will create a safety hazard. Utility Model Content
[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:
[0008] A 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-A body comprising an internal energy storage power supply and a control power supply; the internal energy storage power supply input line is derived 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;
[0009] The main switch QF1 is connected to both ends of the contacts of the time logic relay KT-A. When the main switch QF1 is closed, the time logic relay KT-A is energized, and the normally open contacts of the time logic relay KT-A remain in an open state.
[0010] 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 self-holding contact of the contactor KM is closed. The time logic relay KT-A body performs a time-controlled delayed closing or instantaneous closing of the normally open contact of the time logic relay KT-A body based on the detected closing information of the contactor KM contact;
[0011] A stop button SB1 is provided between the start button SB2 and the working power supply side of the time logic relay KT. When the stop button SB1 is pressed, the coil of the contactor KM loses power and is released, and the self-holding contact of the contactor KM is disconnected, and the contacts of the time logic relay KT-A are disconnected simultaneously. After the stop button SB1 is reset, the coil of the contactor KM is not energized again.
[0012] When the logic control module detects that the voltage on the power supply side drops momentarily, causing the KM coil to be released, it controls the normally open contact of the contactor KM to be opened, and keeps the time logic relay KT-A in a closed state until the body detects no closing information of the contactor KM coil within a first preset time.
[0013] 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.
[0014] 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 are immediately disconnected; 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 is in a delayed closing state, and the contactor KM coil is delayed to be energized and the self-holding circuit is restored to a closed state.
[0015] 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.
[0016] 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.
[0017] Compared to the prior art, the multifunctional time logic relay provided by this utility model avoids the safety hazard of traditional time relays that fail to immediately shut down the machine. Thus, it can achieve the multifunctional effects of instantaneous closing with delayed opening, and delayed closing with instantaneous opening. This effectively addresses the shortcomings of the prior art. The improved relay's usage and wiring structure are largely the same as the previous one, eliminating the need for additional wiring and usage changes, conforming to user habits and effectively avoiding the safety hazard of ineffective manual emergency shutdown. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The figure is a wiring diagram of a time relay applied to a circuit in the prior art.
[0019] Figure 2 This is a wiring schematic diagram of an embodiment of a multifunctional time logic relay of the present application. DETAILED DESCRIPTION
[0020] Please refer to Figure 2 , this embodiment provides a multifunctional time logic relay, including:
[0021] A 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-A body comprising an internal energy storage power supply and a control power supply; the internal energy storage power supply input line is derived 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;
[0022] The main switch QF1 is connected to both ends of the contacts of the time logic relay KT-A. When the main switch QF1 is closed, the time logic relay KT-A is energized, and the normally open contacts of the time logic relay KT-A remain in an open state.
[0023] 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 self-holding contact of the contactor KM is closed. The time logic relay KT-A body performs a time-controlled delayed closing or instantaneous closing of the normally open contact of the time logic relay KT-A body based on the detected closing information of the contactor KM contact;
[0024] 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 no closing information of the contactor KM coil is detected within the first preset time; when KM is disconnected due to a momentary voltage drop, KT remains closed, so that the purpose of automatic closure of the KM coil can be achieved after the power supply is restored.
[0025] 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.
[0026] The stop button SB1 is located between the start button SB2 and the working power supply side of the timer logic relay KT. When pressed, the contactor KM coil loses power, its self-latch contacts open, and the contacts of the timer logic relay KT-A open simultaneously. After the stop button SB1 resets, the contactor KM coil is no longer energized. This multifunctional timer logic relay allows the motor to shut down normally, avoiding the safety hazard of traditional timer relays that prevent immediate shutdown. This allows for the multifunctionality of instantaneous closing with delayed opening, as well as delayed closing with instantaneous opening, addressing both transient and steady-state conditions.
[0027] New circuit symbols for instantaneous close and delayed open, and delayed close and instantaneous open.
[0028] 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 are immediately disconnected; 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 is in a delayed closing state, and the contactor KM coil is delayed to be energized and the self-holding circuit is restored to a closed state.
[0029] 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.
[0030] In summary, the entire control logic is as follows: 1. Main switch QF1 is energized, and time logic relay KT-A is not closed. 2. Contactor KM is closed, and time logic relay KT-A is closed but not closed. 3. Contactor KM is manually released, and time logic relay KT-A is released synchronously without closing. 4. Contactor KM is released due to a momentary drop in the power supply side, and time logic relay KT-A is released with a delay without closing. The power supply is promptly restored to the contactor KM coil pull-in value, causing contactor KM to close. 5. Contactor KM does not close within the first preset time, and time logic relay KT-A is released instantaneously without closing. 6. Power recovery is detected within the second preset time, and time logic relay KT-A is closed with a delay without closing. 7. If the power supply does not return to the preset value within the second preset time, time logic relay KT-A is opened instantaneously without closing.
[0031] The multi-configuration control logic of the time logic relay KT-A, which can be instantaneously closed when not closed and delayed opening, and delayed closing and instantaneous opening, can meet the needs and realize multi-functions far better than the single control mode function of the original passive time relay.
[0032] It's worth noting that during the first preset time, if timer relay KT-A doesn't close, it doesn't detect whether the power supply voltage has returned to normal, but rather checks whether the KM coil is closed to determine whether the power supply has returned to normal. During the second preset time, if timer relay KT-A doesn't close, it checks whether the power supply voltage has returned to a preset threshold (preferably 80-100% of the rated voltage) before deciding whether to delay issuing the instruction to close timer relay KT-A.
[0033] 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.
[0034] 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.
[0035] The technology of this 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 is in line with the user's regular usage habits and effectively avoids the safety hazards of ineffective manual emergency shutdown.
Claims
1. A multifunctional time logic relay, characterized in that: include: 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 input side of the internal energy storage power supply is derived 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 both ends of the self-holding contact of the contactor KM; The main switch QF1 is connected to both ends of the contacts of the time logic relay KT-A. When the main switch QF1 is closed, the time logic relay KT-A is energized, and the normally open contacts of the time logic relay KT-A remain 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 coil of the contactor KM is energized, and the self-holding contact of the contactor KM is closed. The time logic relay KT-A body performs a time-controlled delayed closing or instantaneous closing of the normally open contact of the time logic relay KT-A body based on the detected closing information of the contactor KM contact; A stop button SB1 is provided between the start button SB2 and the working power supply side of the time logic relay KT. When the stop button SB1 is pressed, the coil of the contactor KM loses power and is released, and the self-holding contact of the contactor KM is disconnected, and the contacts of the time logic relay KT-A are disconnected simultaneously. After the stop button SB1 is reset, the coil of the contactor KM is not energized again. When the logic control module detects that the voltage on the power supply side drops momentarily, causing the KM coil to be released, it controls the normally open contact of the contactor KM to be opened, and keeps the time logic relay KT-A in a closed state until the body detects no closing information of the contactor KM coil 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 be delayed to be energized and the self-holding circuit will be restored to a 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 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.