Intermediate relay working state self-diagnosis detection device
By designing the self-diagnosis and detection device of the working state of the intermediate relay in the steel rolling production control system, and using the connection between the controller and external power supply to the intermediate relay, the problem of no detection function of the contact failure of the intermediate relay is solved, and the system is early for abnormalities Prevention, early detection and early treatment functions.
Patent Information
- Application Number
- CN202420946230.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In the existing steel rolling production control system, the contact failure of the intermediate relay has no detection function, resulting in abnormal execution of the control command.
A self-diagnosis and detection device for working state of the intermediate relay is designed to diagnose the contacts of the intermediate relay through the connection between the controller and the external power supply.
The diagnosis of intermediate relay contacts is realized, and the system's self-perception ability of the key output control signal status is improved, so that abnormalities can be prevented, detected and dealt with early.
Smart Images
Figure CN222506508U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steel production, and more specifically, to a self-diagnosis detection device for the working state of an intermediate relay. Background Art
[0002] In the steel rolling production control system, the intermediate relay is used in the automatic control system to increase the number and capacity of contacts. The intermediate relay also plays the role of transmitting intermediate signals in the control circuit. Although the contact capacity of the intermediate relay is not very large, it also has a certain load capacity. At the same time, the current required for its drive is very small, so the intermediate relay can be used to expand the contact capacity. For example, it is generally not possible to directly use the output of the induction switch or transistor to control electrical components with a relatively large load. However, the mechanical contacts of the intermediate relay will experience mechanical wear, contact arcing burns, rebound and contact adhesion during use.
[0003] These shortcomings are prone to cause abnormal command execution problems and phenomena such as the controlled object not moving and the controlled object still working after the control command is revoked in the actual production application process. In addition, there is no effective way to detect the contacts of the intermediate relay in the existing steel rolling production control system. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a self-diagnosis detection device for the working state of an intermediate relay in view of the deficiencies of the prior art, so as to solve the technical problem that the existing intermediate relay contact has no detection function when a fault occurs.
[0005] The utility model discloses a self-diagnosis detection device for the working state of an intermediate relay, comprising a controller and an intermediate relay, which comprises an external power supply, wherein the signal output end of the controller is connected to the coil access end of the intermediate relay, the second terminal of the intermediate relay is connected to the first signal input end of the controller, the third terminal of the intermediate relay is connected to the positive pole of the external power supply, the fifth terminal of the intermediate relay is connected to the second signal input end of the controller, the sixth terminal of the intermediate relay is connected to the positive pole of the external power supply, and the seventh terminal of the intermediate relay is connected to the load.
[0006] As a further improvement, the fourth terminal of the intermediate relay is suspended, and the eighth terminal of the intermediate relay is grounded.
[0007] Furthermore, the third terminal and the fourth terminal of the intermediate relay are normally closed, and the third terminal and the second terminal of the intermediate relay are normally open.
[0008] Furthermore, the sixth terminal and the fifth terminal of the intermediate relay are normally closed, and the sixth terminal and the seventh terminal of the intermediate relay are normally open.
[0009] Furthermore, the first terminal of the intermediate relay is connected to the eighth terminal through a coil.
[0010] Furthermore, the voltage of the external power supply is DC 24V.
[0011] Furthermore, the controller is a PLC.
[0012] Beneficial Effects
[0013] The advantages of the utility model are:
[0014] The utility model adds an external power supply on the basis of the original controller and the intermediate relay, connects the external power supply to the contacts of the intermediate relay, and diagnoses the contacts of the intermediate relay by receiving signals at the first signal input terminal and the second signal input terminal of the controller, thereby realizing contact diagnosis of the intermediate relay, improving the system's self-sensing ability for the status of some key output control signals, and realizing the system's functions of early prevention, early detection, and early processing of abnormalities. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is the wiring diagram of the detection device of the utility model;
[0016] Figure 2 This is a functional flow chart of the detection device of the utility model.
[0017] Among them: U1-controller, KA-intermediate relay, BAT-external power supply, PA-load. DETAILED DESCRIPTION
[0018] The utility model is further described below in conjunction with the embodiments, but does not constitute any limitation to the utility model. Any limited modifications made by anyone within the scope of the claims of the utility model are still within the scope of the claims of the utility model.
[0019] See also Figure 1-Figure 2 The utility model discloses a self-diagnosis detection device for the working state of an intermediate relay, comprising a controller U1 and an intermediate relay KA, and an external power supply BAT. The voltage of the external power supply is DC 24V. The controller is a PLC. The external power supply BAT is used to supply power to the contacts of the intermediate relay KA.
[0020] Depend on Figure 1As shown, the signal output terminal of the controller U1 is connected to the coil access terminal of the intermediate relay KA, the second terminal of the intermediate relay KA is connected to the first signal input terminal of the controller U1, the third terminal of the intermediate relay KA is connected to the positive pole of the external power supply BAT, the fifth terminal of the intermediate relay KA is connected to the second signal input terminal of the controller U1, the sixth terminal of the intermediate relay KA is connected to the positive pole of the external power supply BAT, and the seventh terminal of the intermediate relay KA is connected to the load PA. The fourth terminal of the intermediate relay KA is suspended, and the eighth terminal of the intermediate relay KA is grounded. The preliminary connection of the contact diagnosis is realized.
[0021] The first signal input terminal of the controller U1 is used to detect whether the first contact of the intermediate relay KA works normally, and the second signal input terminal of the controller U1 is used to detect whether the second contact of the intermediate relay KA is contact-adhesive. This realizes the diagnosis of contact-adhesive and abnormal working of the intermediate relay.
[0022] In this embodiment, the controller detects the reception and transmission of electrical signals, which are both existing technologies and are not improved in this embodiment.
[0023] The third and fourth terminals of the intermediate relay KA are normally closed, and the third and second terminals of the intermediate relay KA are normally open. The sixth and fifth terminals of the intermediate relay KA are normally closed, and the sixth and seventh terminals of the intermediate relay KA are normally open. The first terminal of the intermediate relay KA is connected to the eighth terminal through a coil. The contact structure of the intermediate relay KA provides convenience for the detection contact to realize the detection circuit.
[0024] Among them, the second terminal and the third terminal of the intermediate relay KA form a first normally open contact. Figure 1 NO1 is used to represent that the third terminal and the fourth terminal of the intermediate relay KA form the first normally closed contact. Figure 1 NC1 is used to indicate that the seventh terminal and the sixth terminal of the intermediate relay KA form the second normally open contact. Figure 1 NO2 is used to represent that the fifth terminal and the sixth terminal of the intermediate relay KA form the second normally closed contact. Figure 1 The second normally closed contact NC2 is used to represent it.
[0025] Depend on Figure 2As shown, the signal output terminal of the controller U1 outputs an electrical signal, the coil of the intermediate relay KA is energized, the first normally open contact NO1 and the second normally open contact NO2 of the intermediate relay are closed, the first normally closed contact NC1 and the second normally closed contact NC2 of the intermediate relay are disconnected, the external power supply BAT supplies power to the load PA through the sixth terminal and the seventh terminal of the intermediate relay, the external power supply BAT inputs an electrical signal to the first signal input terminal of the controller U1 through the third terminal and the second terminal of the intermediate relay, and the intermediate relay KA is in normal working condition.
[0026] When the signal output terminal of the controller U1 outputs an electrical signal, the first normally open contact NO1 of the intermediate relay remains disconnected, and the first signal input terminal of the controller U1 is at a low level, the working state of the first contact of the intermediate relay KA is abnormal, thus realizing the diagnosis of abnormal working of the contacts of the intermediate relay.
[0027] When the signal output terminal of the controller U1 outputs an electrical signal, the first normally open contact NO1 and the second normally open contact NO2 of the intermediate relay are both closed, the first normally closed contact NC1 and the second normally closed contact NC2 of the intermediate relay are both disconnected, and the second signal input terminal of the controller U1 is at a low level;
[0028] When the signal output terminal of the controller U1 stops outputting signals, the first normally open contact NO1 of the intermediate relay KA returns to the original open state and the first normally closed contact NC1 returns to the original closed state, the second normally open contact NO2 of the intermediate relay KA remains closed and the second normally closed contact NC2 remains open, and the second signal input terminal of the controller U1 is still at a low level, then the second contact of the intermediate relay KA is contact-adhesive. This realizes the diagnosis of contact adhesion of the intermediate relay KA.
[0029] The utility model realizes the diagnosis of the intermediate relay contacts, improves the system's self-sensing ability for the states of some key output control signals, and realizes the system's functions of early perception, early detection, early processing, and early prevention of abnormalities.
[0030] The working principle of the utility model is:
[0031] The signal output end of the controller U1 outputs an electrical signal, the coil of the intermediate relay KA is energized, the first normally open contact NO1 and the second normally open contact NO2 of the intermediate relay are closed, the first normally closed contact NC1 and the second normally closed contact NC2 of the intermediate relay are disconnected, the external power supply BAT supplies power to the load PA through the sixth terminal and the seventh terminal of the intermediate relay, the external power supply BAT inputs an electrical signal to the first signal input end of the controller U1 through the third terminal and the second terminal of the intermediate relay, and the intermediate relay KA is in normal working condition.
[0032] When the signal output terminal of the controller U1 outputs an electrical signal, the first normally open contact NO1 of the intermediate relay remains in the original disconnected state, and the first signal input terminal of the controller U1 is at a low level, the working state of the first contact of the intermediate relay KA is abnormal.
[0033] When the signal output terminal of the controller U1 outputs an electrical signal, the first normally open contact NO1 and the second normally open contact NO2 of the intermediate relay are both closed, the first normally closed contact NC1 and the second normally closed contact NC2 of the intermediate relay are both disconnected, and the second signal input terminal of the controller U1 is at a low level;
[0034] When the signal output terminal of the controller U1 stops outputting signals, the first normally open contact NO1 of the intermediate relay KA returns to its original open state and the first normally closed contact NC1 returns to its original closed state, the second normally open contact NO2 of the intermediate relay KA remains in a closed state and the second normally closed contact NC2 remains in a disconnected state, and the second signal input terminal of the controller U1 is still at a low level, then the second contact of the intermediate relay KA undergoes contact sticking.
[0035] 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, which will not affect the effect of the implementation of the present invention and the practicality of the patent.
Claims
1. A self-diagnosis detection device for the working state of an intermediate relay, comprising a controller (U1) and an intermediate relay (KA), characterized in that: It comprises an external power supply (BAT), a signal output end of the controller (U1) is connected to a coil access end of an intermediate relay (KA), a second terminal of the intermediate relay (KA) is connected to a first signal input end of the controller (U1), a third terminal of the intermediate relay (KA) is connected to a positive electrode of the external power supply (BAT), a fifth terminal of the intermediate relay (KA) is connected to a second signal input end of the controller (U1), a sixth terminal of the intermediate relay (KA) is connected to a positive electrode of the external power supply (BAT), and a seventh terminal of the intermediate relay (KA) is connected to a load (PA).
2. The self-diagnosis detection device for the working state of an intermediate relay according to claim 1, characterized in that: The fourth terminal of the intermediate relay (KA) is suspended, and the eighth terminal of the intermediate relay (KA) is grounded.
3. The self-diagnosis detection device for the working state of an intermediate relay according to claim 1, characterized in that: The third terminal and the fourth terminal of the intermediate relay (KA) are normally closed, and the third terminal and the second terminal of the intermediate relay (KA) are normally open.
4. The self-diagnosis detection device for the working state of an intermediate relay according to claim 1, characterized in that: The sixth terminal and the fifth terminal of the intermediate relay (KA) are normally closed, and the sixth terminal and the seventh terminal of the intermediate relay (KA) are normally open.
5. The self-diagnosis detection device for the working state of an intermediate relay according to claim 1, characterized in that: The first terminal of the intermediate relay (KA) is connected to the eighth terminal via a coil.
6. The self-diagnosis detection device for the working state of an intermediate relay according to claim 1, characterized in that: The voltage of the external power supply (BAT) is DC 24V.
7. The self-diagnosis detection device for the working state of an intermediate relay according to claim 1, characterized in that: The controller is a PLC.