Equipment for testing state of solid-state relay in continuous casting fan-shaped section control box
By designing a test equipment that simulates the principle of field control, the state of solid-state relays is judged by using the light bulb, the misjudgment and damage caused by the inability to detect the state is solved, and the fault diagnosis efficiency and the reliability of the relay are improved.
Patent Information
- Application Number
- CN202421819022.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-30
AI Technical Summary
During continuous casting, the solid-state relay cannot detect its status and is easily discarded due to misjudgment, and it will be damaged due to long-term high-strength operation.
A test equipment that simulates the principle of field control is designed. The light bulb is used as a carrier to accurately judge the working status of the solid-state relay by observing the light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light bulb's light
It improves the efficiency and accuracy of fault diagnosis of solid-state relays, extends its service life, and improves its reliability and stability.
Smart Images
Figure CN223006270U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of solid state relays, and particularly relates to a testing device for the state of a solid state relay in a continuous casting segment control box. Background Technique
[0002] A solid state relay (SSR for short) is a new type of contactless switch. Its composition is relatively complex and mainly consists of parts such as a microelectronic circuit, discrete electronic devices, and power electronic power devices. This relay adopts an isolation method of optoelectronic coupling or pulse signals between the control end and the load end to ensure the stable transmission of signals. In practical applications, the solid state relay receives a tiny control signal and then directly drives a large-current load, greatly improving the reliability and stability of the system.
[0003] Currently, during the continuous casting process, the control of the segment is mainly achieved through the position sensor of the end controller, which can precisely control the pressing down and lifting of the segment, thereby improving product quality. However, due to some problems that may exist in the segment cylinder, such as external factors like oil leakage, oil circuit blockage, or the hydraulic lock being unable to lock, the segment may not reach the roll gap value required by the production process, which requires continuous adjustment, resulting in the frequent output of the solid state relay, and the number of fluctuations may even reach one hundred thousand times. Such long-term high-intensity work is likely to cause damage to the relay.
[0004] However, since the solid state relay cannot be detected for its quality when it is not powered on, without a special measuring device, it is very easy to discard a good solid state relay due to misjudgment. Summary of the Invention
[0005] Aiming at the problems existing in the prior art, the utility model provides a testing device for the state of a solid state relay in a continuous casting segment control box, and designs a measuring device that simulates the on-site control principle. It uses a light bulb as a carrier, and by observing the on and off states of the light bulb, the working state of the solid state relay can be accurately judged, thus avoiding the misjudgment problem caused by the inability to detect.
[0006] The technical solution adopted by the utility model is as follows:
[0007] A testing device for the state of a solid state relay in a continuous casting segment control box includes:
[0008] A relay socket for installing the solid state relay, and input wiring terminals and output wiring terminals are arranged on the relay socket; the input wiring terminals include an input positive wiring terminal and an input negative wiring terminal, and the output wiring terminals include an output positive wiring terminal and an output negative wiring terminal;
[0009] A 24V DC power supply, the positive terminal of the 24V DC power supply is connected to the output positive terminal; the positive terminal of the 24V DC power supply is connected to the input positive terminal through a test button; the negative terminal of the 24V DC power supply is connected to the output negative terminal through a light bulb; the negative terminal of the 24V DC power supply is connected to the input negative terminal; the input positive terminal is connected to the input negative terminal through an indicator light.
[0010] In an implementable technical solution, the solid-state relay consists of three parts: an input circuit, an isolation circuit, and an output circuit.
[0011] In an implementable technical solution, the input circuit includes an optocoupler.
[0012] In an implementable technical solution, the output circuit includes a triac and a power field-effect transistor.
[0013] In an implementable technical solution, the solid-state relay is a Phoenix OV-24DC / 60DC / 4 relay.
[0014] In an implementable technical solution, the parameters of the light bulb are: a 36V 60W light bulb with a current of 1.38A; or a 36V 100W light bulb with a current of 2.3A.
[0015] Compared with the prior art, the advantages and positive effects of this application are:
[0016] By applying the above technical solution, the utility model can realistically simulate the working principle of the solid-state relay. Furthermore, by observing the working states of the light bulb and the indicator light, the operating state of the solid-state relay can be quickly and accurately judged, that is, whether there is a fault in the solid-state relay can be determined. The implementation of this technical solution not only improves the efficiency of solid-state relay fault diagnosis but also improves the accuracy of diagnosis, thus facilitating the maintenance and repair of the solid-state relay, helping to extend the service life of the solid-state relay, and improving its reliability and stability. At the same time, this technical solution also has high practicality and broad application prospects and is worthy of popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1This is the circuit diagram of the preferred embodiment of the present utility model.
[0019] Among them: 1. Relay socket; 2. 24V DC power supply; 3. Bulb; 4. Test button; 5. Indicator light. Specific implementation manner
[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but only represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.
[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.
[0022] The working principle of a Solid State Relay (SSR) is based on the characteristics of electronic components.
[0023] Solid state relay, a kind of switching device that uses solid components to achieve circuit control. Compared with traditional mechanical relays, it has many remarkable advantages. First of all, it has very high reliability because there are no mechanical contacts inside the solid state relay, thus avoiding failures caused by problems such as contact wear and arc ablation. This greatly extends its service life and enables it to maintain a stable working state for a long time. Secondly, the solid state relay has very fast switching ability and can complete the on-off switching of the circuit within the microsecond level. This extremely fast response speed is crucial for applications that require quick response. Moreover, the solid state relay hardly generates noise during operation because it does not rely on the bounce of mechanical contacts and arcs to complete the switching action, making it very suitable for occasions with high requirements for the working environment. In addition, the solid state relay has good electromagnetic compatibility. It is less sensitive to electromagnetic interference and generates relatively less electromagnetic interference itself, enabling it to still maintain stable operation in a complex electromagnetic environment. Finally, since there are no mechanical components inside the solid state relay, it can withstand strong vibrations and impacts, allowing it to still work normally in an environment with large vibrations and impacts.
[0024] However, the solid state relay also has some disadvantages. First of all, its on-state voltage drop is relatively large, resulting in relatively high self-power consumption and serious heating. Therefore, good heat dissipation conditions are required to ensure its normal operation. Secondly, its overload capacity is poor and it is easily damaged in the case of overcurrent and overvoltage, which limits its application in some occasions with high requirements for overload protection. Moreover, the price of the solid state relay is relatively high because its production and manufacturing costs are higher than those of traditional electromagnetic relays. Finally, there may still be a small leakage current in the off state of the solid state relay. Although this has little impact on some applications, it is still an issue that needs attention in some occasions with strict requirements for leakage current.
[0025] Please refer to Figure 1 , a test device for the state of a solid state relay in a continuous casting segment control box, comprising:
[0026] Relay socket 1, used to install and fix the solid state relay to achieve the connection between the solid state relay and other test components. The relay socket 1 is mainly provided with input wiring terminals and output wiring terminals; specifically including: the input wiring terminals include an input positive wiring terminal and an input negative wiring terminal, and the output wiring terminals include an output positive wiring terminal and an output negative wiring terminal;
[0027] A 24V DC power supply 2, the positive terminal of the 24V DC power supply 2 is connected to the output positive terminal wiring terminal; the positive terminal of the 24V DC power supply 2 is connected to the input positive terminal wiring terminal through a test button 4; the negative terminal wiring terminal of the 24V DC power supply 2 is connected to the output negative terminal wiring terminal through a bulb 3; the negative terminal wiring terminal of the 24V DC power supply 2 is connected to the input negative terminal wiring terminal; the input positive terminal wiring terminal is connected to the input negative terminal wiring terminal through an indicator light 5.
[0028] A solid-state relay, a new type of circuit control component, its core composition can generally be divided into three main parts: an input circuit, an isolation circuit, and an output circuit. The input circuit is responsible for receiving and processing control signals. Usually, this circuit will use high-efficiency electronic components such as optocouplers to achieve electrical isolation from the output circuit, ensuring the safety and stability of signal transmission. When a control signal is input into the input circuit, the light-emitting diode in the optocoupler in the circuit will be stimulated to emit light signals, and then these light signals will be received by the photosensitive triode connected in the circuit, thereby triggering the conduction of the photosensitive triode. This process is the starting point of the entire solid-state relay operation.
[0029] The isolation circuit, as a key link in the solid-state relay, undertakes the important task of preventing electrical interference between the input and output circuits. Its existence ensures the stability and reliability of the control signal during transmission, avoids errors that may be caused by electrical interference, and ensures the normal operation of the circuit system.
[0030] The output circuit is the part that realizes the final on / off of the circuit. Usually, high-efficiency semiconductor devices such as triacs and power MOSFETs are used. When the control signal of the input circuit makes the isolation circuit conduct, the semiconductor devices in the output circuit will also conduct accordingly, so that the load circuit can be connected and the current can flow smoothly. Once the control signal disappears, these semiconductor devices will immediately cut off, and the load circuit will also be disconnected, thus ensuring the safety and controllability of the circuit.
[0031] Generally speaking, the solid-state relay realizes fast and accurate circuit on / off management without mechanical contacts by the precise control and efficient switching of a series of electronic components. Compared with traditional mechanical relays, this relay has a longer service life, a higher operation speed, and a lower maintenance cost, so it has been widely used in modern electronic circuit systems.
[0032] Next, taking the function test of the OV-24DC / 60DC / 4 model relay of Phoenix brand as an example, the entire test process will be described in detail:
[0033] First, in the first step of conducting the test, the relay needs to be connected to a 220V AC power supply. This step requires strict compliance with electrical safety regulations to ensure a stable power supply that meets the relevant national standards, thus guaranteeing the safety and reliability of the test process.
[0034] Next, in the second step of the test, it is necessary to observe whether the light bulb lights up on its own when the relay is not manually pressed on the red test button. If this situation occurs, then it can be determined that the relay has a constant-conduction fault. The specific manifestation of this fault is a breakdown phenomenon, that is, the resistance value between the output positive terminal and the output negative terminal of the relay becomes very small, generally within 1KΩ, while under normal circumstances this resistance value is greater than 300KΩ.
[0035] Then, in the third step of the test, that is, when the red test button is pressed, it is necessary to closely observe the reaction of the green indicator light 5. If the green indicator light 5 lights up, then this indicates that the coil of the relay is receiving a 24VDC power supply. At the same time, the lighting of the indicator light 5 also indicates that the contacts of the relay have closed, and at this time the current passing through the relay is 1A. On the contrary, if the indicator light 5 does not light up, it means that the contacts of the relay have not closed, which may indicate that the relay has an open circuit situation, suggesting that the relay may be damaged.
[0036] When conducting the above tests, the parameter settings of the light bulb also need to be considered. The selectable light bulb parameters include: a 36V 60W light bulb with a current passing through it of 1.38A; or a 36V 100W light bulb with a current passing through it of 2.3A. The selection of these parameters needs to be determined according to the specific rated voltage and power of the relay to ensure the accuracy of the test and the normal operation of the relay.
[0037] The entire test process needs to be meticulous and rigorous to ensure that each step meets the technical requirements and test standards of the relay, thereby accurately judging the functional status of the relay. Such a test method can not only detect possible problems with the relay but also provide an accurate basis for subsequent repair or replacement.
[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included within the protection scope of the present invention.
Claims
1. A test device for the state of solid-state relays in a continuous casting sector control box, characterized in that: include: A relay socket (1) for mounting a solid-state relay, wherein the relay socket (1) is provided with an input wiring terminal and an output wiring terminal; the input wiring terminal comprises an input positive wiring terminal and an input negative wiring terminal, and the output wiring terminal comprises an output positive wiring terminal and an output negative wiring terminal; A 24V DC power supply (2), wherein the positive terminal of the 24V DC power supply (2) is connected to the output positive terminal; the positive terminal of the 24V DC power supply (2) is connected to the input positive terminal via a test button (4); the negative terminal of the 24V DC power supply (2) is connected to the output negative terminal via a light bulb (3); the negative terminal of the 24V DC power supply (2) is connected to the input negative terminal; the input positive terminal is connected to the input negative terminal via an indicator light (5).
2. The testing device for the state of solid-state relays in the continuous casting sector control box according to claim 1, characterized in that: The solid-state relay consists of three parts: an input circuit, an isolation circuit and an output circuit.
3. The testing device for the state of solid-state relays in the continuous casting sector control box according to claim 2, characterized in that: The input circuit includes a photocoupler.
4. The testing device for the state of solid-state relays in the continuous casting sector control box according to claim 2, characterized in that: The output circuit includes a bidirectional thyristor and a power field effect transistor.
5. The testing device for the state of solid-state relays in a continuous casting sector control box according to any one of claims 1 to 4, characterized in that: The solid state relay is a Phoenix OV-24DC / 60DC / 4 relay.
6. The testing device for the state of solid-state relays in the continuous casting sector control box according to claim 5, characterized in that: The parameters of the light bulb (3) are: a 36V 60W light bulb, with a current of 1.38A; or a 36V 100W light bulb, with a current of 2.3A.