Safety control loop device

Abstract

The utility model discloses a safety control loop device, relates to the field of safety control, and solves the technical problems that an existing safety control circuit is relatively low in safety and easy to fail. The circuit comprises a controller, a first input protection circuit, a second input protection circuit and a feedback circuit, the first input protection circuit and the second input protection circuit are electrically connected with the input end of the controller, a load circuit is electrically connected with the output end of the controller, and the feedback circuit is electrically connected with the control end of the controller. According to the utility model, the flexibility of circuit protection is improved, and the safety of circuit use is improved.

Description

Technical Field

[0001] The utility model relates to the field of safety control, and more specifically, to a safety control loop device. Background Art

[0002] The emergency stop circuit usually contains a contact that quickly separates when the button is pressed, causing the circuit to open and thus stopping the power supply to the equipment. This circuit is designed to remain disconnected once activated and will not return to the disconnected state even if the hand pressure is removed to prevent accidental resetting. The emergency stop switch is generally connected in series to the control circuit of the equipment, which means that as long as the emergency stop switch is activated, regardless of other control signals, the main power supply or key control signal will be directly cut off to achieve an immediate stop. This design of the emergency stop switch helps to quickly cut off the power supply in dangerous situations or emergencies (such as failures, fires or other emergencies), prevent further expansion of accidents, and ensure personal safety.

[0003] like Figure 1 As shown, the existing circuit uses an emergency stop switch, which is a series connection of contacts, to control a single circuit. When the emergency stop is pressed, the load circuit loses power. After resetting, the load power source is also reset. If the contacts in this emergency stop circuit fail, the emergency stop will fail. When the contacts fail, the emergency stop will be ineffective. After the emergency stop is reset, the circuit will immediately return to its initial state, which affects safety. Pressing the emergency stop switch resets the emergency stop switch and the circuit returns to its initial state, which reduces safety and lacks a feedback mechanism. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a safety control circuit device in view of the deficiencies of the existing technology, so as to solve the technical problems that the existing safety control circuit has low safety and is easy to fail.

[0005] The utility model describes a safety control loop device, which includes a controller, a first input protection circuit, a second input protection circuit and a feedback circuit. The first input protection circuit and the second input protection circuit are both electrically connected to the input end of the controller, the load circuit is electrically connected to the output end of the controller, and the feedback circuit is electrically connected to the control end of the controller.

[0006] As a further improvement, the feedback circuit includes a reset switch and a first circuit breaker, the thirty-first terminal of the feedback circuit is electrically connected to one end of the reset switch, the reset switch and the first circuit breaker are connected in series, and one end of the first circuit breaker is electrically connected to the thirty-second terminal of the feedback circuit.

[0007] Furthermore, the first terminal of the first input protection circuit is electrically connected to the eleventh terminal of the controller, the first terminal of the first input protection circuit is electrically connected to the second terminal of the first input protection circuit through the emergency stop button, and the second terminal of the first input protection circuit is electrically connected to the twelfth terminal of the controller.

[0008] Furthermore, the first terminal of the second input protection circuit is electrically connected to the twenty-first terminal of the controller, the first terminal of the second input protection circuit is electrically connected to the second terminal of the second input protection circuit through the emergency stop button, and the second terminal of the second input protection circuit is electrically connected to the twenty-second terminal of the controller.

[0009] Furthermore, the fourteenth terminal of the controller is electrically connected to the load circuit.

[0010] Furthermore, the controller is a safety relay of model G9SX-BC202-RT DC24.

[0011] Beneficial effects

[0012] The advantages of the present invention are:

[0013] 1. The utility model is provided with a controller, an emergency stop button, a first input protection circuit and a second input protection circuit, and adopts a dual protection circuit of the first input protection circuit and the second input protection circuit, adding two contacts. When one contact fails, the other contact can be used normally, thereby improving the flexibility of circuit protection.

[0014] 2. The utility model is provided with a feedback circuit. After the emergency stop button is reset, the load circuit will not restart immediately. The load circuit can only be restarted by pressing the reset switch of the feedback circuit, thereby improving the safety of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An electrical diagram of the existing emergency stop circuit;

[0016] Figure 2 This is the electrical diagram of the safety control circuit of the utility model.

[0017] Among them: SBemo-emergency stop button, EMO1-first input protection circuit, EMO2-second input protection circuit, RESET-reset switch, QF1-first circuit breaker, R-load circuit, FC-feedback circuit, U1-controller. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0019] See Figure 2 The present invention provides a safety control circuit device, comprising a controller U1, a first input protection circuit EMO1, a second input protection circuit EMO2, and a feedback circuit FC. Both the first input protection circuit EMO1 and the second input protection circuit EMO2 are electrically connected to the input terminal of the controller U1, a load circuit R is electrically connected to the output terminal of the controller U1, and the feedback circuit FC is electrically connected to the control terminal of the controller U1. The dual protection circuit of the first input protection circuit EMO1 and the second input protection circuit EMO2 adds two contact points. When one circuit fails, the other circuit remains operational, improving the flexibility of circuit protection and the safety of circuit operation.

[0020] A first terminal of the first input protection circuit EMO1 is electrically connected to an eleventh terminal of the controller U1. The first terminal of the first input protection circuit EMO1 is electrically connected to a second terminal of the first input protection circuit EMO1 via an emergency stop button SBemo. The second terminal of the first input protection circuit EMO1 is electrically connected to a twelfth terminal of the controller U1. The eleventh terminal of the controller U1 outputs current.

[0021] A first terminal of the second input protection circuit EMO2 is electrically connected to terminal 21 of the controller U1. The first terminal of the second input protection circuit EMO2 is electrically connected to a second terminal of the second input protection circuit EMO2 via the emergency stop button SBemo. The second terminal of the second input protection circuit EMO2 is electrically connected to terminal 22 of the controller U1. Terminal 21 of the controller U1 outputs current.

[0022] Feedback circuit FC includes a reset switch RESET and a first circuit breaker QF1. Terminal 31 of feedback circuit FC is electrically connected to terminal 31 of controller U1. Terminal 32 of feedback circuit FC is electrically connected to terminal 32 of controller U1. Terminal 31 of feedback circuit FC is electrically connected to one end of reset switch RESET. Reset switch RESET and first circuit breaker QF1 are connected in series. One end of first circuit breaker QF1 is electrically connected to terminal 32 of feedback circuit FC. Terminal 31 of controller U1 outputs current.

[0023] The feedback circuit FC includes a reset switch RESET and a first circuit breaker QF1 . The first terminal of the feedback circuit FC is electrically connected to the reset switch RESET. The reset switch RESET and the first circuit breaker QF1 are connected in series. The first circuit breaker QF1 is electrically connected to the second terminal of the feedback circuit FC.

[0024] When the reset switch RESET on the feedback circuit FC is pressed and the controller U1 detects current input to terminal 32 of the controller U1, it restarts the load circuit. This improves circuit safety and prevents the load circuit from immediately restarting when the emergency stop button SBemo is reset, potentially endangering personnel safety.

[0025] The first circuit breaker QF1 is used to protect the feedback circuit FC. It can cut off and connect the circuit and quickly cut off the circuit when a fault occurs to prevent the accident from expanding and ensure safe operation.

[0026] The controller is a safety relay model G9SX-BC202-RT DC24, and the emergency stop button SBemo model is XB2BS542C.

[0027] The working principle of this utility model is:

[0028] When a fault occurs in the load circuit R, by pressing the emergency stop button SBemo, the first input protection circuit EMO1 and the second input protection circuit EMO2 are cut off at the same time. When the controller U1 detects that there is no current input to the twelfth terminal or the twenty-second terminal, the controller U1 shuts down the load circuit R. After the emergency stop button SBemo is reset, the load circuit R will not start immediately.

[0029] When the reset switch RESET on the feedback circuit FC is pressed, the controller U1 detects that there is current input to the thirty-second terminal, and the controller U1 restarts the load circuit.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A safety control circuit device, characterized in that: It comprises a controller (U1), a first input protection circuit (EMO1), a second input protection circuit (EMO2) and a feedback circuit (FC); the first input protection circuit (EMO1) and the second input protection circuit (EMO2) are both electrically connected to the input end of the controller (U1); a load circuit (R) is electrically connected to the output end of the controller (U1); and the feedback circuit (FC) is electrically connected to the control end of the controller (U1).

2. A safety control circuit device according to claim 1, characterized in that: The feedback circuit (FC) includes a reset switch (RESET) and a first circuit breaker (QF1), a thirty-first terminal of the feedback circuit (FC) is electrically connected to one end of the reset switch (RESET), the reset switch (RESET) and the first circuit breaker (QF1) are connected in series, and one end of the first circuit breaker (QF1) is electrically connected to the thirty-second terminal of the feedback circuit (FC).

3. A safety control circuit device according to claim 1, characterized in that: The first terminal of the first input protection circuit (EMO1) is electrically connected to the eleventh terminal of the controller (U1), the first terminal of the first input protection circuit (EMO1) is electrically connected to the second terminal of the first input protection circuit (EMO1) through the emergency stop button (SBemo), and the second terminal of the first input protection circuit (EMO1) is electrically connected to the twelfth terminal of the controller (U1).

4. A safety control circuit device according to claim 3, characterized in that: The first terminal of the second input protection circuit (EMO2) is electrically connected to the twenty-first terminal of the controller (U1), the first terminal of the second input protection circuit (EMO2) is electrically connected to the second terminal of the second input protection circuit (EMO2) through the emergency stop button (SBemo), and the second terminal of the second input protection circuit (EMO2) is electrically connected to the twenty-second terminal of the controller (U1).

5. A safety control circuit device according to claim 1, characterized in that: The fourteenth terminal of the controller (U1) is electrically connected to the load circuit (R).

6. A safety control circuit device according to claim 1, characterized in that: The controller (U1) is a safety relay of model G9SX-BC202-RT DC24.

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