Novel intermediate frequency furnace silicon controlled rectifier water temperature monitoring system

Abstract

The invention relates to the technical field of water temperature monitoring of silicon controlled rectifier cooling water channels, and discloses a novel intermediate frequency furnace silicon controlled rectifier water temperature monitoring system which comprises a host, a rectifier cabinet temperature switch, an inversion temperature switch, a host power source and a remote alarm. The outer surface of the shell is provided with a display panel, color-changing LED lamp beads are integrated on the display panel, and the color-changing LED lamp beads and the temperature sensors are in one-to-one correspondence. The water temperature of the rectifier cabinet silicon controlled cooling water channel and the water temperature of the inverter circuit silicon controlled cooling water channel can be accurately monitored in real time. And 2, the water temperature condition of each cooling water path is intuitively judged by observing the color change of the color-changing LED lamp beads. And 3, when any temperature sensor monitors that the water temperature exceeds a preset threshold value, the system immediately triggers the remote alarm to send out an alarm signal.

Description

Technical Field

[0001] The invention relates to the technical field of water temperature monitoring of a thyristor cooling water channel, and in particular to a novel thyristor water temperature monitoring system for a medium frequency furnace. Background Art

[0002] For medium-frequency furnace power supply systems controlled by high-power thyristors, whether they are rectifier thyristors or inverter thyristors, a large amount of heat will be generated when a large current passes through them, causing the thyristors to heat up rapidly. When a certain temperature is reached, the thyristors will burn out. Therefore, thyristors usually use water as a medium to dissipate heat and cool them down. The specific heat dissipation method is to install the thyristors alternately with cooling blocks with internal water channels. When water flows through the cooling blocks' water channels, it removes the heat generated by the thyristors, thereby maintaining the thyristor temperature within the normal operating range. However, in actual systems, impurities in the water channels or corrosion of the water channels can reduce the water flow rate, affecting the heat dissipation effect and increasing the risk of thyristor use. Therefore, monitoring the system water temperature plays a vital role in the safe production of thyristors. At present, the water temperature monitoring system only monitors the main circuit water channel and cannot detect problems in time when abnormalities occur in the branch circuit. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a novel medium frequency furnace thyristor water temperature monitoring system, which is achieved through the following technical solutions.

[0004] A new medium frequency furnace thyristor water temperature monitoring system, including:

[0005] A host, comprising a housing and a main circuit board integrated in the housing;

[0006] The rectifier cabinet temperature switch is connected to the main circuit board and is used to monitor the water temperature of the rectifier cabinet thyristor cooling water channel;

[0007] Two inverter temperature switches are provided and are connected to the main circuit board respectively. The two inverter temperature switches are used to monitor the water temperature of the thyristor cooling water paths of the two inverter circuits respectively.

[0008] Host power supply, used to provide power to the host. The host power supply is a 5V DC power supply and is connected to the VCC terminal of the main circuit board;

[0009] Remote alarm: When the rectifier cabinet temperature switch and inverter temperature switch detect that the water temperature is greater than the preset threshold, the remote alarm will send out an alarm signal.

[0010] As a further solution of the present invention, the rectifier cabinet temperature switch and the inverter temperature switch each include a group of temperature sensors, and the temperature sensors of the rectifier cabinet temperature switch and the inverter temperature switch are respectively placed in the rectifier cabinet thyristor cooling water path and the inverter circuit thyristor cooling water path, and one end of each group of sensors is electrically connected to the common terminal COM1 of the main circuit board, and the other end is electrically connected to the signal input terminal of the main circuit board.

[0011] As a further solution of the present invention, each group of temperature sensors is eight.

[0012] As a further solution of the present invention, a display panel is provided on the outer surface of the shell, and color-changing LED lamp beads are integrated on the display panel. The color-changing LED lamp beads correspond one-to-one to the temperature sensors, and the color-changing LED lamp beads are electrically connected to the output control end of the main circuit board. The temperature condition monitored by the temperature sensor is judged by the color of the color-changing LED lamp beads.

[0013] As a further solution of the present invention, the main control panel is provided with a normally open passive contact switch and also includes an alarm power supply. The positive pole of the alarm power supply is electrically connected to one of the contacts of the normally open passive contact switch through a remote alarm, and the negative pole of the alarm power supply is electrically connected to the other contact of the normally open passive contact switch.

[0014] As a further solution of the present invention, the main circuit board includes a logic chip for comparing the monitored temperature of the temperature sensor with a preset temperature threshold. Based on the comparison result, on the one hand, the color of the color-changing LED lamp bead is changed, and on the other hand, the state of the normally open passive contact switch is switched.

[0015] As a further solution of the present invention, when the temperature monitored by the temperature sensor is lower than a preset threshold value, the corresponding color-changing LED lamp bead is displayed in green and the normally open passive contact switch is disconnected; when the temperature monitored by the temperature sensor is greater than or equal to the preset threshold value, the corresponding color-changing LED lamp bead is displayed in red and the normally open passive contact switch is closed.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present invention uses the rectifier cabinet temperature switch and the inverter temperature switch to monitor the water temperature of the rectifier cabinet thyristor cooling water path and the inverter circuit thyristor cooling water path in real time and accurately, ensuring that the system can accurately control the water temperature of key components in any working state, effectively preventing equipment failures caused by abnormal water temperature.

[0018] 2. A display panel is provided on the outer surface of the main unit housing, which is integrated with color-changing LED lamp beads. Each color-changing LED lamp bead corresponds to a temperature sensor one by one, so that the operator can intuitively judge the water temperature of each cooling water channel by observing the color change of the color-changing LED lamp bead without complicated operations, which greatly improves the convenience and safety of operation.

[0019] 3. When any temperature sensor detects that the water temperature exceeds the preset threshold, the system will immediately trigger the remote alarm to send an alarm signal, ensuring that abnormal situations can be discovered and handled in time, effectively preventing equipment damage or even safety accidents caused by excessive water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the description of the specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 : Circuit diagram of a novel medium frequency furnace thyristor water temperature monitoring system according to the present invention;

[0022] Figure 2 : A front view of the display panel of the present invention.

[0023] The reference numerals are as follows:

[0024] 1. Casing, 2- Main circuit board, 3- Rectifier cabinet temperature switch, 4- Inverter temperature switch, 5- Host power supply, 6- Remote alarm, 7- Temperature sensor, 8- Display panel, 9- Color-changing LED lamp beads, 10- Normally open passive contact switch, 11- Alarm power supply,. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] like Figure 1-2 As shown, the present invention has the following three specific embodiments.

[0027] Example 1

[0028] A new medium frequency furnace thyristor water temperature monitoring system, including:

[0029] The host comprises a housing 1 and a main circuit board 2 integrated in the housing 1;

[0030] The rectifier cabinet temperature switch 3 is connected to the main circuit board 2 and is used to monitor the water temperature of the rectifier cabinet thyristor cooling water circuit;

[0031] Inverter temperature switches 4, two of which are respectively connected to the main circuit board 2, and the two inverter temperature switches 4 are respectively used to monitor the water temperature of the thyristor cooling water paths of the two inverter circuits;

[0032] Host power supply 5, used to provide power to the host, the host power supply 5 is a 5V DC power supply and is connected to the VCC terminal of the main circuit board 2;

[0033] The remote alarm 6 sends an alarm signal when the rectifier cabinet temperature switch 3 and the inverter temperature switch 4 detect that the water temperature is greater than a preset threshold.

[0034] In this embodiment, the water temperatures of the rectifier cabinet thyristor cooling water path and the inverter circuit thyristor cooling water path are monitored respectively by the rectifier cabinet temperature switch 3 and the inverter temperature switch 4. Specifically, the present application has two inverter circuits, and an inverter temperature switch 4 is set for the thyristor cooling water path of each inverter circuit. The host power supply 5 is used to power the host. The temperature monitored by the rectifier cabinet temperature switch 3 and the inverter temperature switch 4 is sent to the main circuit board 2. When the water temperature is detected to be greater than the preset threshold, the main circuit board 2 controls the remote alarm 6 to send an alarm signal.

[0035] Example 2

[0036] The rectifier cabinet temperature switch 3 and the inverter temperature switch 4 each include a group of temperature sensors 7. The temperature sensors 7 of the rectifier cabinet temperature switch 3 and the inverter temperature switch 4 are respectively placed in the rectifier cabinet thyristor cooling water path and the inverter circuit thyristor cooling water path. One end of each group of sensors is electrically connected to the common terminal COM1 of the main circuit board 2, and the other end is electrically connected to the signal input terminal of the main circuit board 2.

[0037] Preferably, each group of temperature sensors 7 consists of eight.

[0038] Preferably, a display panel 8 is provided on the outer surface of the housing 1, and a color-changing LED lamp bead 9 is integrated on the display panel 8. The color-changing LED lamp bead 9 corresponds one-to-one to the temperature sensor 7, and the color-changing LED lamp bead 9 is electrically connected to the output control end of the main circuit board 2. The temperature condition monitored by the temperature sensor 7 is judged by the color of the color-changing LED lamp bead 9.

[0039] Preferably, a normally open passive contact switch 10 is provided on the main control panel, and also includes an alarm power supply 11. The positive pole of the alarm power supply 11 is electrically connected to one of the contacts of the normally open passive contact switch 10 through the remote alarm 6, and the negative pole of the alarm power supply 11 is electrically connected to the other contact of the normally open passive contact switch 10.

[0040] In this embodiment, the temperature sensor 7 serves as a monitoring element for the rectifier cabinet temperature switch 3 and the inverter temperature switch 4, and the rectifier cabinet temperature switch 3 and the inverter temperature switch 4 each include a group of eight temperature sensors 7, each group of sensors is placed at a different position in the thyristor cooling water circuit to facilitate comprehensive temperature monitoring.

[0041] Color-changing LED lamp beads 9 are integrated on the display panel 8 to display the temperature status in the thyristor cooling water path.

[0042] The remote alarm 6, the alarm power supply 11 and the normally open passive contact switch 10 form a current open circuit.

[0043] Example 3

[0044] The main circuit board 2 includes a logic chip for comparing the monitored temperature of the temperature sensor 7 with a preset temperature threshold. Based on the comparison result, the color of the color-changing LED lamp bead 9 is changed on the one hand, and the state of the normally open passive contact switch 10 is switched on the other hand.

[0045] Preferably, when the temperature monitored by the temperature sensor 7 is lower than a preset threshold, the corresponding color-changing LED lamp bead 9 is displayed as green and the normally open passive contact switch 10 is disconnected; when the temperature monitored by the temperature sensor 7 is greater than or equal to the preset threshold, the corresponding color-changing LED lamp bead 9 is displayed as red and the normally open passive contact switch 10 is closed.

[0046] In this embodiment, the main circuit board 2 compares the monitored temperature of the temperature sensor 7 with a preset temperature threshold through a logic chip, thereby controlling the color change of the color-changing LED lamp bead 9 and controlling the on and off of the normally open passive contact switch 10.

[0047] The working principle of the present invention is:

[0048] like Figure 1-Figure 2 As shown, the temperature sensors 7 of the rectifier cabinet temperature switch 3 and the inverter temperature switch 4 are respectively placed in the cooling water path of the rectifier cabinet thyristor and the cooling water path of the inverter circuit thyristor to monitor the water temperature.

[0049] The main circuit board 2 receives the monitored temperature data and compares it with the built-in threshold value. When the temperature monitored by the temperature sensor 7 is lower than the preset threshold value, the corresponding color-changing LED lamp bead 9 is displayed as green. When all the color-changing LED lamp beads 9 are displayed as green, the normally open passive contact switch 10 is disconnected and the remote alarm 6 does not work.

[0050] When the temperature monitored by the temperature sensor 7 is greater than or equal to the preset threshold, the corresponding color-changing LED lamp bead 9 is displayed in red. When any color-changing LED lamp bead 9 is displayed in red and the normally open passive contact switch 10 is closed, the remote alarm 6 sends an alarm signal, and the fault location can be identified by observing which color-changing LED lamp bead 9 is displayed in red, which is convenient for quick maintenance.

[0051] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A new medium frequency furnace thyristor water temperature monitoring system, characterized in that: include: A host computer, comprising a housing (1) and a main circuit board (2) integrated in the housing (1); A rectifier cabinet temperature switch (3), which is connected to the main circuit board (2) and is used to monitor the water temperature of the rectifier cabinet thyristor cooling water circuit; Two inverter temperature switches (4) are provided and are respectively connected to the main circuit board (2), and the two inverter temperature switches (4) are respectively used to monitor the water temperature of the thyristor cooling water paths of the two inverter circuits; A host power supply (5) is used to provide power to the host. The host power supply (5) is a 5V DC power supply and is connected to the VCC terminal of the main circuit board (2); The remote alarm (6) sends an alarm signal when the rectifier cabinet temperature switch (3) and the inverter temperature switch (4) detect that the water temperature is greater than a preset threshold value.

2. A novel medium frequency furnace thyristor water temperature monitoring system according to claim 1, characterized in that: The rectifier cabinet temperature switch (3) and the inverter temperature switch (4) each include a group of temperature sensors (7). The temperature sensors (7) of the rectifier cabinet temperature switch (3) and the inverter temperature switch (4) are respectively placed in the rectifier cabinet thyristor cooling water path and the inverter circuit thyristor cooling water path. One end of each group of sensors is electrically connected to the common end COM1 of the main circuit board (2), and the other end is electrically connected to the signal input end of the main circuit board (2).

3. A novel medium frequency furnace thyristor water temperature monitoring system according to claim 2, characterized in that: Each group of temperature sensors (7) comprises eight.

4. A novel medium frequency furnace thyristor water temperature monitoring system according to claim 3, characterized in that: The outer surface of the housing (1) is provided with a display panel (8), and the display panel (8) is integrated with a color-changing LED lamp bead (9), the color-changing LED lamp bead (9) corresponds to the temperature sensor (7) one by one, and the color-changing LED lamp bead (9) is electrically connected to the output control end of the main circuit board (2), and the temperature condition monitored by the temperature sensor (7) is judged by the color of the color-changing LED lamp bead (9).

5. A novel medium frequency furnace thyristor water temperature monitoring system according to claim 4, characterized in that: The main control panel is provided with a normally open passive contact switch (10) and also includes an alarm power supply (11), wherein the positive pole of the alarm power supply (11) is electrically connected to one of the contacts of the normally open passive contact switch (10) through the remote alarm (6), and the negative pole of the alarm power supply (11) is electrically connected to the other contact of the normally open passive contact switch (10).

6. A novel medium frequency furnace thyristor water temperature monitoring system according to claim 5, characterized in that: The main circuit board (2) includes a logic chip for comparing the monitored temperature of the temperature sensor (7) with a preset temperature threshold value, and according to the comparison result, on the one hand, changing the color of the LED lamp bead, and on the other hand, switching the state of the normally open passive contact switch (10).

7. A novel medium frequency furnace thyristor water temperature monitoring system according to claim 6, characterized in that: When the temperature monitored by the temperature sensor (7) is less than a preset threshold value, the corresponding LED lamp bead is displayed in green and the normally open passive contact switch (10) is disconnected; when the temperature monitored by the temperature sensor (7) is greater than or equal to the preset threshold value, the corresponding LED lamp bead is displayed in red and the normally open passive contact switch (10) is closed.

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