A power regulation module

Abstract

This invention discloses a power regulation module, comprising: a time base circuit for outputting a clock signal to a reversible counter circuit; a reversible counter circuit connected to the time base circuit for performing real-time reverse counting upon receiving the clock signal from the time base circuit, and after the count reaches a predetermined reverse counting duration, performing frequency division processing on the clock signal, and then outputting a corresponding digital signal to a first thyristor output circuit and a second thyristor output circuit; the first thyristor output circuit and the second thyristor output circuit are respectively connected to the reversible counter circuit, for driving the thyristors to output operating voltage according to the time-division digital signal sent by the reversible counter circuit. This invention can meet the power supply requirements of newly added electric heating elements without increasing the capacity of the existing snow melting transformer supplying power to the electric heating elements of the turnout snow melting system, solving the power supply problem of the newly added electric heating elements, and has significant practical significance.

Description

Technical Field

[0001] This invention relates to the field of circuit design technology, and in particular to a power regulation module. Background Technology

[0002] In most parts of northern my country, the railway transportation system is often troubled by snow and ice after entering winter. If the snow on the turnouts is not cleared in time or is not cleared thoroughly, the tip of the turnout switch rail may not be in close contact with the stock rail or the turnout may freeze, which may cause railway delays, suspensions, or even become a hidden danger to railway transportation safety.

[0003] Currently, electric heating turnout snow melting systems are widely used on railways. By installing electric heating elements on the rails in front of the turnouts, the rails are heated to achieve the purpose of snow melting and de-icing.

[0004] Given that the existing electric heating elements in the turnout snow melting system are not long enough to heat the base of the switch rail, ice will accumulate at the base of the switch rail in snowy weather when the ambient temperature is below 0°C.

[0005] To solve the above problems, an additional electric heating element of a certain length needs to be added at the root of the switch rail (i.e., a new electric heating element). However, the capacity of the snow melting transformer used to power the electric heating element on site is already saturated. There is an urgent need to develop a technology that can meet the power supply requirements of the newly added electric heating element without increasing the capacity of the existing snow melting transformer. Summary of the Invention

[0006] The purpose of this invention is to address the technical deficiencies of existing technologies by providing a power regulation module.

[0007] To this end, the present invention provides a power regulation module, which includes a time base circuit, a reversible counter circuit, a first thyristor output circuit, and a second thyristor output circuit.

[0008] A time base circuit is used to output a clock signal to a reversible counter circuit;

[0009] A reversible counter circuit, connected to a time base circuit, is used to perform reverse counting in real time when a clock signal is received from the time base circuit. After the count reaches a predetermined reverse counting duration, the clock signal is divided by frequency, and then the corresponding digital signal is output to the first thyristor output circuit and the second thyristor output circuit in a time-division manner.

[0010] The first thyristor output circuit is connected to the reversible counter circuit and is used to drive the thyristor to output a working voltage according to the digital signal sent by the reversible counter circuit.

[0011] The second thyristor output circuit is connected to the reversible counter circuit and is used to drive the thyristor to output a working voltage based on the digital signal sent by the reversible counter circuit.

[0012] As can be seen from the technical solution provided by the present invention above, compared with the prior art, the present invention provides a power regulation module with a scientific design that can meet the power supply requirements of the newly added electric heating element without increasing the capacity of the original snow melting transformer, thus solving the power supply problem of the newly added electric heating element and having significant practical significance.

[0013] The technical solution of this invention addresses the issue that the capacity of the existing snow-melting transformer used to power the electric heating elements of the turnout snow-melting system is already saturated. It proposes a novel power regulation module that can heat existing and newly added electric heating elements in a time-sharing manner, thereby meeting the actual needs of the site, while reducing on-site construction work, saving costs, and without increasing the capacity of the electrical control cabinet and transformer, while maintaining the rated power.

[0014] After testing, the power regulation module provided by this invention is easy to install, requires less on-site construction, saves costs, saves time and is highly efficient, and can be widely used in the expansion of on-site turnout snow melting systems. Attached Figure Description

[0015] Figure 1 A structural block diagram of a power regulation module provided by the present invention;

[0016] Figure 2 A schematic diagram of a time base circuit (specifically a 555 time base circuit) in a power regulation module provided by the present invention;

[0017] Figure 3 A schematic diagram of a reversible counter circuit in a power regulation module provided by the present invention;

[0018] Figure 4 A schematic diagram of the first thyristor output circuit in a power regulation module provided by the present invention;

[0019] Figure 5 A schematic diagram of the second thyristor output circuit in a power regulation module provided by the present invention;

[0020] Figure 6a A front view of the module housing of one embodiment of a power regulation module provided by the present invention;

[0021] Figure 6b A left view of the module housing of one embodiment of a power regulation module provided by the present invention;

[0022] Figure 6cA right view of the module housing of one embodiment of a power regulation module provided by the present invention;

[0023] Figure 6d A bottom view of the module housing of one embodiment of a power regulation module provided by the present invention;

[0024] Figure 6e This is a top view of the module housing of one embodiment of a power regulation module provided by the present invention. Detailed Implementation

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] See Figures 1 to 5 , Figures 6a to 6eThe present invention provides a power adjustment module for adjusting the power of electric heating elements (specifically including existing electric heating elements and newly added electric heating elements) in the turnout snow melting system of railway signaling system infrastructure equipment;

[0030] The power regulation module includes a time base circuit (specifically a 555 time base circuit) 100, a reversible counter circuit 200, a first thyristor output circuit 300, and a second thyristor output circuit 400.

[0031] The time base circuit 100 is used to output a clock signal with an adjustable clock frequency (instantaneous base frequency) to the reversible counter circuit;

[0032] The reversible counter circuit 200 is connected to the time base circuit 100. When it receives a clock signal from the time base circuit 100, it performs reverse counting in real time. After the count reaches a predetermined reverse counting duration, it performs frequency division processing on the clock signal and then outputs the corresponding digital signal (specifically including two binary digital signals, high level and low level) to the first thyristor output circuit 300 and the second thyristor output circuit 400 in a time-division manner.

[0033] The first thyristor output circuit 300 is connected to the reversible counter circuit 200 and is used to drive the thyristor to output working voltage to the outside (for example, an existing electric heating element) according to the digital signal sent by the reversible counter circuit 200.

[0034] The second thyristor output circuit 400 is connected to the reversible counter circuit 200 and is used to drive the thyristor to output working voltage to the outside (for example, another newly added electric heating element) according to the digital signal sent by the reversible counter circuit 200.

[0035] It should be noted that the electric heating turnout snow melting system is a well-known and mature existing technology and is one of the basic components of turnout switching equipment. When snowfall or changes in ambient temperature occur, it collects the rail temperature through rail temperature sensors, and the monitoring module in the electrical control cabinet judges the situation and automatically or manually starts (shuts down) each heating circuit. It controls the electric heating elements in the heating circuit to melt the snow and ice accumulated at the turnout switching part, ensuring the normal switching of the turnout in winter.

[0036] In this invention, for specific implementation, see [link to relevant documentation]. Figure 2 As shown, the time base circuit (specifically a 555 time base circuit) 100 includes a timing chip U3 and a first power supply VCC1;

[0037] The first power supply VCC1 is connected to one end of the variable resistor W1, and pins 4 and 8 of the timing chip U3, respectively.

[0038] The other end of the variable resistor W1 is connected to pin 7 of the timing chip U3 and one end of the resistor R2, respectively.

[0039] The other end of resistor R2 is connected to pin 1, pin 2, and pin 6 of timing chip U3, as well as the positive terminal of polarized capacitor C6.

[0040] The negative terminal of polarized capacitor C6 is grounded;

[0041] Pins 1, 2, and 6 of the timing chip U3 are grounded after the busbars intersect;

[0042] Pin 5 of the timing chip U3 is grounded through capacitor C5.

[0043] In practice, the third pin of the timing chip U3 is connected to the fourth pin of the reversible counter chip U4 in the reversible counter circuit 200.

[0044] In terms of specific implementation, the timing chip U3 uses the SA555D chip manufactured by Texas Instruments, which is a well-known and technologically mature chip.

[0045] In this invention, for specific implementation, see [link to relevant documentation]. Figure 3 As shown, the reversible counter circuit 200 includes a reversible counter chip U4, a reversible counter chip U5, and a frequency divider U6;

[0046] Pin 4 of the reversible counter chip U4 is connected to pin 3 of the timing chip U3 in the time base circuit 100;

[0047] Pins 15, 10, 9, 5, and 11 of the reversible counter chip U4 are connected to the second power supply VCC2 after the busbars intersect.

[0048] Pins 1, 14, and 8 of the reversible counter chip U4 are grounded after the busbars intersect.

[0049] Pin 12 of reversible counter chip U4 is connected to pin 5 of reversible counter chip U5;

[0050] Pin 13 of the reversible counter chip U4 is connected to pin 4 of the reversible counter chip U5;

[0051] Pin 16 of the reversible counter chip U4 is connected to the third power supply VCC3;

[0052] Pins 15, 10, and 11 of the reversible counter chip U5 are connected to the fourth power supply VCC4 after the busbars intersect.

[0053] Pins 1, 9, and 14 of the reversible counter chip U5, as well as pin 8, are grounded after the busbars intersect.

[0054] Pin 16 of the reversible counter chip U5 is connected to the fifth power supply VCC5;

[0055] Pin 13 of the reversible counter chip U5 is connected to pin 14 of the frequency divider U6;

[0056] Pin 13 of frequency divider U6 is grounded;

[0057] Pin 15 of frequency divider U6 is connected to one end of capacitor C12 and one end of resistor R7 respectively;

[0058] The other end of capacitor C12 is connected to the sixth power supply VCC6;

[0059] The other end of resistor R7 is grounded;

[0060] Pins 15, 8, and 4 of frequency divider U6 are grounded after the busbars intersect;

[0061] Pin 16 of frequency divider U6 is connected to the seventh power supply VCC7;

[0062] Pin 3 of frequency divider U6 is connected to the control signal input terminal CONTROL_UP1 in the first thyristor output circuit 300;

[0063] Pin 2 of frequency divider U6 is connected to the control signal input terminal CONTROL_UP2 in the second thyristor output circuit 400.

[0064] In practice, pins 2, 3, 6, and 7 of the reversible counter chip U4 are left unused.

[0065] In practice, pins 2, 3, 6, and 7 of the reversible counter chip U5 are left unused.

[0066] In practice, pin 12 of the reversible counter chip U5 is left unused.

[0067] In practice, pins 7, 10, 1, 5, 6, 9, 11, and 12 of the frequency divider U6 are left unused.

[0068] It should be noted that, as Figure 3As shown, when a rectangular clock signal of a certain frequency is input to the DN pin (i.e., pin 4) of the reversible counter chip U4 via the 3rd pin (i.e., OUT pin) of the timing chip U3 in the timer circuit 100, the reversible counter chip U4 will count backwards from 9 until it becomes 0. Then, it will carry over to the TCD pin (i.e., pin 13) and onto the DN pin (i.e., pin 4) of U5. Thus, the reversible counter chip U5 will also start counting backwards from 9 to 0. This continues until one cycle is completed. U5 then carries over to the TCD pin (i.e., pin 13). Since the clock pin (i.e., pin 14) of the frequency divider U6 is connected to the TCD pin (i.e., pin 13) of the reversible counter chip U5, the clock pin (i.e., pin 14) of the frequency divider U6 receives the clock signal and begins frequency division and shifting (from pin Q0 to pin Q1). When it shifts to pin Q2, pin Q2 immediately resets the reset terminal of the frequency divider U6, and the frequency divider U6 performs the shift for the next cycle, and so on.

[0069] In this invention, the reversible counter circuit 200 enables a level shift between pins Q0 (pin 3) and Q1 (pin 2) every 100 counts. When pin Q2 outputs a high level, U6 is reset, and pin Q0 outputs a high level.

[0070] In this invention, for specific implementation, see [link to relevant documentation]. Figure 4 As shown, the first thyristor output circuit 300 includes a control signal input terminal CONTROL_UP1, an optocoupler U7, a thyristor Q1, and an AC transformer L1;

[0071] The control signal input terminal CONTROL_UP1 is connected to the third pin of the frequency divider U6 in the reversible counter circuit 200;

[0072] The control signal input terminal CONTROL_UP1 is connected to pin 2 of optocoupler U7 through resistor R3;

[0073] Pin 1 of optocoupler U7 is connected to the eighth power supply VCC8;

[0074] Pin 6 of optocoupler U7 is connected to one end of resistor R12;

[0075] Pin 4 of optocoupler U7 is connected to pin 3 of thyristor Q1;

[0076] A resistor R13 is connected between pin 3 and pin 1 of the thyristor Q1;

[0077] The other end of resistor R12 is connected to pin 2 of thyristor Q1, one end of resistor R14, and AC voltage input terminal AC_INPUT1, respectively.

[0078] Pin 1 of the thyristor Q1 is also connected to one end of capacitor C17 and the third port of the primary side of AC transformer L1.

[0079] The other end of resistor R14 is connected to the other end of capacitor C17;

[0080] An LED3 is connected between port 1 and port 2 on the secondary side of AC transformer L1;

[0081] The fourth port on the primary side of AC transformer L1 is connected to the AC voltage output terminal AC_OUTPUT1;

[0082] In practice, pins 3 and 5 of optocoupler U7 are left unused.

[0083] In practice, the AC voltage input terminal AC_INPUT1 is connected to the live wire on the secondary side of the existing (i.e., original) snow melting transformer. The function of the snow melting transformer is to output AC 220V operating power to the electric heating element (e.g., the existing electric heating element).

[0084] In practice, the AC voltage output terminal AC_OUTPUT1 is connected to the live wire of the input power port of the existing electric heating element. The neutral wire of the power input port of the existing electric heating element is connected to the neutral wire of the secondary side of the existing snow melting transformer. When the live wire port of the existing electric heating element receives voltage input from an external source (i.e., the snow melting transformer), the existing electric heating element can operate.

[0085] In this invention, for specific implementation, see [link to relevant documentation]. Figure 5 As shown, the second thyristor output circuit 400 includes a control signal input terminal CONTROL_UP2, an optocoupler U9, a thyristor Q3, and an AC transformer L2;

[0086] The control signal input terminal CONTROL_UP2 is connected to the second pin of the frequency divider U6 in the reversible counter circuit 200;

[0087] The control signal input terminal CONTROL_UP2 is connected to pin 2 of optocoupler U9 through resistor R5;

[0088] Pin 1 of optocoupler U9 is connected to the ninth power supply VCC9;

[0089] Pin 6 of optocoupler U9 is connected to one end of resistor R18;

[0090] Pin 4 of optocoupler U9 is connected to pin 3 of thyristor Q3;

[0091] A resistor R19 is connected between pin 3 and pin 1 of the thyristor Q3;

[0092] The other end of resistor R18 is connected to pin 2 of thyristor Q3, one end of resistor R20, and AC voltage input terminal AC_INPUT2, respectively.

[0093] Pin 1 of the thyristor Q3 is also connected to one end of capacitor C19 and the third port of the primary side of AC transformer L2.

[0094] The other end of resistor R20 is connected to the other end of capacitor C19;

[0095] An LED4 is connected between port 1 and port 2 on the secondary side of AC transformer L2;

[0096] The fourth port on the primary side of AC transformer L2 is connected to the AC voltage output terminal AC_OUTPUT2;

[0097] In practice, pins 3 and 5 of the optocoupler U9 are left unused.

[0098] In practice, the AC voltage input terminal AC_INPUT2 is connected to the live wire on the secondary side of the existing snow melting transformer. The function of the snow melting transformer is to output AC 220V operating power to the electric heating element (e.g., a newly added electric heating element).

[0099] It should be noted that the circuit design principle of the second thyristor output circuit 400 and the first thyristor output circuit 300 is the same.

[0100] It should be noted that pin 2, CONTROL_UP2, of frequency divider U6 is connected to the control signal input terminal CONTROL_UP2 of the second thyristor output circuit 400. The AC voltage output terminal AC_OUTPUT2 of the second thyristor output circuit 400 is connected to the live wire of the power input port of the newly added electric heating element. The neutral wire of the power input port of the newly added electric heating element is connected to the neutral wire of the secondary side of the snow melting transformer. When the live wire port of the newly added electric heating element receives voltage input from an external source (i.e., the snow melting transformer), the newly added electric heating element will operate.

[0101] It should be noted that, as Figure 4 , Figure 5 As shown, the first thyristor output circuit 300 uses optocoupler U7 to drive thyristor Q1; the second thyristor output circuit 400 uses optocoupler U9 to drive thyristor Q3.

[0102] Among them, optocouplers U7 and U9 have zero-crossing triggering characteristics. When the control terminal is low, the control terminal is turned on, and optocouplers U7 and U9 will automatically detect the load voltage. Optocouplers U7 and U9, as AC switches, are suitable for AC applications with large loads.

[0103] The maximum output current of thyristors Q1 and Q3 is 40A, the peak voltage is 600V, and the operating temperature is -40℃ to +125℃. Thyristors Q1 and Q3 are bidirectional thyristors with a gate trigger current of 500mA. A resistor R13 is connected in parallel between pin 1 and pin 3 of thyristor Q1, and a resistor R19 is connected in parallel between pin 1 and pin 3 of thyristor Q3 to prevent false triggering.

[0104] R14 and C17 form an RC circuit, and R20 and C19 form an RC circuit connected in parallel in the circuit. This is used to attenuate high-frequency spike signals in the AC signal and prevent spike signals from flowing into optocouplers U7 and U9 and damaging the devices.

[0105] In this system, AC transformers L1 and L2 are added after the thyristors Q1 and Q3, respectively. The current during conduction is collected by AC transformers L1 and L2 and indicated by LEDs LED3 and LED4.

[0106] In this invention, specifically, the timing chip U3 is a mature chip with existing technology, such as the SA555D chip manufactured by Texas Instruments. When there is a power input, the power supply charges the capacitor C6 (aluminum electrolytic capacitor CD11-25V-47uF) through potentiometer W1 (model 3296W-1-503LF) and resistor R2 (surface mount resistor RI0805-102F). When capacitor C6 is first charged, pin 2 of timer chip U3 is at a low level, so pin 3 of the output terminal of timer chip U3 is at a high level. When the power supply charges capacitor C6 to 2 / 3 of the power supply voltage through W1 and resistor R2, the level of pin 3 of the output terminal of timer chip U3 changes from high to low, the internal discharge tube of timer chip U3 is turned on, and capacitor C6 discharges to pin 7 of timer chip U3 through R2 until the voltage across capacitor C6 is lower than 1 / 3 of the power supply voltage. Then, pin 3 of timer chip U3 changes from low to high again, and capacitor C6 is charged again. This cycle repeats, forming an oscillation.

[0107] The frequency of the timing chip U3 can be changed by changing the resistance value of resistor W1. The rectangular clock signal output by the timing chip U3 directly enters the DN pin (i.e., the 4th pin) of the reversible counter chip U4.

[0108] In this invention, specifically, the reversible counter chips U4 and U5 are both HD74HC192N, which are decimal programmable synchronous down counters. When a rectangular clock signal of a certain frequency is input to the DN pin (i.e., pin 4) of the reversible counter chip U4 by the timing chip U3, the reversible counter chip U4 will count backwards from 9 until it becomes 0. At this point, the TCD pin (i.e., pin 13) of the reversible counter chip U4 sends a borrow pulse to the reversible counter chip U5, and the reversible counter chip U5 begins to count backwards. When the counter of the reversible counter chip U5 is at 0, the TCD pin (i.e., pin 13) of U5 sends a pulse signal to the frequency divider U6, completing one counting cycle. The reversible counter chips U4 and U5 then enter the next cycle of down counting.

[0109] In this invention, specifically, the frequency divider U6, model CD4017, is used. The function of frequency divider U6 is to distribute the pulse signal, with the entire output timing sequence being Q0, Q1, Q2… For every 10 input counting pulses, one carry pulse is obtained, shifting from Q0 to Q1. When the shift reaches Q2, the MR pin (i.e., pin 14, the clear pin) of frequency divider U6 is high, resetting frequency divider U6. At this time, Q0 is high, and the remaining outputs are low, repeating this cycle.

[0110] In this invention, specifically, optocoupler U7, model MOC3083, is an opto-isolated trigger, zero-crossing triggered, used to drive thyristor Q1 (model BTA41600B) and provide isolation. Specifically, the control signal input terminal CONTROL_UP1 is connected to pin 2 of optocoupler U7 via resistor R3 (model RI0805-821F). When the control signal input terminal CONTROL_UP1 is low, optocoupler U7 conducts, triggering thyristor Q1 to conduct, resulting in an output at AC voltage output terminal AC_OUTPUT1, connecting the AC load (i.e., the electric heating element). An AC transformer L1 is added after thyristor Q1. The AC transformer L1 is used to collect the current when the load is connected, indicated by LED3-L1 (model BT1132-D).

[0111] It should be noted that the optocoupler U9 has the same model and working principle as the optocoupler U7, except that it is used to drive the thyristor Q3 (model BTA41600B).

[0112] In this invention, specifically, the power supplies VCC1 to VCC9 are all 5V DC power supplies.

[0113] In this invention, specifically, the timing chip U3 is a mature electronic component with existing technology, such as the SA555D model, named Integrated Circuit Clock Circuit, and branded by TI / Texas Instruments.

[0114] It should be noted that for the timing chip U3, model SA555D, its pins are as follows: Pin 1: Ground; Pin 2: Input, which determines if the voltage is less than 1 / 3 Vcc; Pin 3: Output; Pin 4: Clear pin; Pin 5: Control voltage pin; Pin 6: Input, which determines if the voltage is greater than 2 / 3 Vcc; Pin 7: Discharge pin; Pin 8: External power supply Vcc, typically 5V.

[0115] For timing chip U3, when power is input, the power supply charges capacitor C6 through resistors W1 and R2. When C6 is just starting to charge, pin 2 of timing chip U3 is at a low level, so pin 3 of the output is at a high level. When the power supply charges C6 to 2 / 3 of the power supply voltage through W1 and R2, the level of pin 3 of the output changes from high to low, the internal discharge tube of timing chip U3 conducts, and capacitor C6 discharges through R2 to pin 7 of timing chip U3 until the voltage across capacitor C6 is lower than 1 / 3 of the power supply voltage. Then, pin 3 of timing chip U3 changes from low to high again, and capacitor C6 is charged again. This cycle repeats, forming an oscillation. The frequency of timing chip U3 can be changed by changing the resistance value of resistor W1. The rectangular clock signal output by timing chip U3 directly enters the DN pin (i.e., pin 4) of reversible counter chip U4.

[0116] In this invention, specifically, the reversible counter chip U4 and the reversible counter chip U5 are both existing mature electronic components, for example, both are model HD74HC192N, named integrated circuit logic gate circuit, and branded as HITACHI.

[0117] It should be noted that both reversible counter chips U4 and U5 are of model number HD74HC192N, and are decimal programmable synchronous up and down counters. For reversible counter chips U4 and U5, pin 5 (UP): up counter clock input. Pin 4 (DN): down counter clock input. Pin 11 (PL): preset input. Pin 14 (MR): clear input. Pin 12 (TCU): asynchronous carry output. Pin 13 (TCD): asynchronous borrow output. Pin 16: external power supply Vcc. Pin 8: ground. Pins D0-D3 (i.e., pins 15, 1, 10, and 9): counter inputs. Pins Q0-Q3 (i.e., pins 3, 2, 6, and 7): data outputs. When a rectangular clock signal of a certain frequency is input to the DN pin (pin 4) of the reversible counter chip U4, the reversible counter chip U4 will count backwards from 9 until it reaches 0. At this point, the TCD pin (pin 13) of the reversible counter chip U4 sends a borrow pulse to U5, and the reversible counter chip U5 begins to count down. When the counter of the reversible counter chip U5 is at 0, the TCD pin (pin 13) of the reversible counter chip U5 sends a pulse signal to the frequency divider U6, completing one counting cycle. The reversible counter chips U4 and U5 then enter the next cycle of counting down.

[0118] In this invention, specifically, the frequency divider U6 is a mature electronic component with existing technology, such as the CD4017, branded by National Semiconductor.

[0119] It should be noted that the frequency divider U6 is model CD4017. Among its components: Pin 14 (CLK): Frequency signal input. Pins Q0-Q9 (i.e., pins 3, 2, 4, 7, 10, 1, 5, 6, 7, 9, and 11): Counting pulse output. Pin 12 (C0): Carry output. Pin 15 (MR): Clear. Pin 13: Timing enable pin, connected to a low potential. Pin 16: External power supply Vcc. Pin 8: Ground. The function of frequency divider U6 is to distribute the pulse signal; the entire output timing sequence is Q0, Q1, Q2… For every 10 input counting pulses, one carry pulse is obtained, which shifts the bit from Q0 to Q1. When the bit shifts to Q2, the MR pin (i.e., pin 15, the clear pin) goes high, and the frequency divider U6 is reset. At this time, Q0 goes high, and the other outputs go low. This cycle repeats continuously.

[0120] In this invention, specifically, the optocoupler U7 is a mature electronic component with existing technology, such as the model MOC3083, branded by Fairchild.

[0121] In this invention, specifically, the thyristor Q1 is a mature electronic component with existing technology, model number BTA41600B, brand name ST / STMicroelectronics.

[0122] In this invention, specifically, the current transformers L1 and L2 are existing mature electronic components, such as the model TA0913-2A, brand Xinchuang Sifang.

[0123] In this invention, for specific implementation, see [link to relevant documentation]. Figures 6a to 6e The power regulation module of the present invention includes a module housing 1;

[0124] An AC voltage input cable sealing connector 2 is provided at the bottom center of the module housing 1;

[0125] Two AC voltage output cable sealed connectors 3 are provided on the right middle part of the module housing 1;

[0126] In practice, the external dimensions of the module housing 1 can be 146.5mm × 62mm × 129mm (width × depth × height).

[0127] The AC voltage input cable sealing connector 2 (i.e., the lower end interface of the module housing 1) is used as the power supply interface of the module of the present invention. Specifically, it includes two AC voltage input terminals AC_INPUT1 and AC_INPUT2, which are used to input external AC220 live wire, neutral wire, and ground wire, as well as input AC220 live wire of electric heating element.

[0128] Two AC voltage output cable sealed connectors 3 (i.e., the two interfaces on the right side of module housing 1), specifically including AC voltage output terminal AC_OUTPUT1 and AC voltage output terminal...

[0129] AC_OUTPUT2 is used as a two-way multiplexed output of the module of this invention. Each interface has 3 lines, of which 1 line is in direct supply mode and 2 lines are in multiplexed mode.

[0130] In terms of specific implementation, an LED indicator 4 is provided on the left end of the module housing 1. The LED indicator 4 can be a +5V 4-way multiplexed indicator.

[0131] In terms of specific implementation, a guide rail buckle 5 (the specific length can be 100mm) is provided at the bottom of the module housing 1;

[0132] The guide rail clip 5 is engaged and fixed with the original guide rail of the external snow melting transformer.

[0133] In summary, the technical solution of this invention provides a stable and adjustable time base frequency through a 555 timer circuit, providing a reliable and stable clock signal for the subsequent digital circuit (i.e., the reversible counter circuit 200). The digital circuit uses a reversible counter for counting. After the count reaches a predetermined time, a clock signal is sent to the frequency divider U6 (a digital frequency divider). The frequency divider performs a 2-bit cyclic carry output. The output digital signal drives a pre-amplifier optocoupler U7 (used to isolate the control signal and the subsequent thyristor) and an optocoupler U9 in the first thyristor output circuit 300 and the second thyristor output circuit 400. Optocoupler U7 drives thyristor Q1 and optocoupler U9 drives thyristor Q3, thereby realizing time-sharing heating of two electric heating elements (specifically including one existing electric heating element and another newly added electric heating element).

[0134] It should be noted that one of the two electric heating elements is connected to the AC voltage output terminal AC_OUTPUT1, and the other is connected to the AC voltage output terminal AC_OUTPUT2. The function of the AC voltage output terminals AC_OUTPUT1 and AC_OUTPUT2 is to provide live wire output for the two electric heating elements (including one existing electric heating element and the other newly added electric heating element).

[0135] The existing electric heating elements are mature technologies. For example, a straight handle with a straight bar (the bar is the heating bar) 5200mm / 2400W is installed at the rail web in front of the turnout to heat the rail and melt snow at the turnout location. The newly added electric heating elements are also mature technologies. For example, a straight handle with a straight bar (the bar is the heating bar) 1100mm / 350W is installed at the rail web at the base of the switch rail to melt snow at the base of the switch rail.

[0136] In summary, compared with the prior art, the power regulation module provided by the present invention is scientifically designed and can meet the power supply requirements of newly added electric heating elements without increasing the capacity of the original snow melting transformer, thus solving the power supply problem of the newly added electric heating elements and having significant practical significance.

[0137] The technical solution of this invention addresses the issue that the capacity of the existing snow-melting transformer used to power the electric heating elements of the turnout snow-melting system is already saturated. It proposes a novel power regulation module that can heat existing and newly added electric heating elements in a time-sharing manner, thereby meeting the actual needs of the site, while reducing on-site construction work, saving costs, and without increasing the capacity of the electrical control cabinet and transformer, while maintaining the rated power.

[0138] After testing, the power regulation module provided by this invention is easy to install, requires less on-site construction, saves costs, saves time and is highly efficient, and can be widely used in the expansion of on-site turnout snow melting systems.

[0139] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A power conditioning module, characterized by, The application relates to a time base circuit (100), a reversible counter circuit (200) and a first thyristor output circuit (300) and a second thyristor output circuit (400). The time base circuit (100) is used for outputting a clock signal to the reversible counter circuit; The reversible counter circuit (200) is connected with the time base circuit (100) and is used for performing real-time reverse counting when receiving the clock signal from the time base circuit (100), performing frequency division processing on the clock signal after the reverse counting reaches a predetermined reverse counting duration, and then outputting corresponding digital signals to the first thyristor output circuit (300) and the second thyristor output circuit (400) in time; The first thyristor output circuit (300) is connected with the reversible counter circuit (200) and is used for driving a thyristor to output working voltage to an existing electric heating element according to the digital signal from the reversible counter circuit (200); The second thyristor output circuit (400) is connected with the reversible counter circuit (200) and is used for driving a thyristor to output working voltage to a newly-added electric heating element according to the digital signal from the reversible counter circuit (200); The reversible counter circuit (200) comprises a reversible counter chip U4, a reversible counter chip U5 and a frequency divider U6; The fourth pin of the reversible counter chip U4 is connected with the third pin of a timing chip U3 in the time base circuit (100); The fifteenth pin, the tenth pin, the ninth pin, the fifth pin and the eleventh pin of the reversible counter chip U4 are connected with a second power supply VCC2 after converging; The first pin, the fourteenth pin and the eighth pin of the reversible counter chip U4 are grounded after converging; The twelfth pin of the reversible counter chip U4 is connected with the fifth pin of the reversible counter chip U5; The thirteenth pin of the reversible counter chip U4 is connected with the fourth pin of the reversible counter chip U5; The sixteenth pin of the reversible counter chip U4 is connected with a third power supply VCC3; The fifteenth pin, the tenth pin and the eleventh pin of the reversible counter chip U5 are connected with a fourth power supply VCC4 after converging; The first pin, the ninth pin, the fourteenth pin and the eighth pin of the reversible counter chip U5 are grounded after converging; The sixteenth pin of the reversible counter chip U5 is connected with a fifth power supply VCC5; The thirteenth pin of the reversible counter chip U5 is connected with the fourteenth pin of the frequency divider U6; The thirteenth pin of the frequency divider U6 is grounded; The fifteenth pin of the frequency divider U6 is connected with one end of a capacitor C12 and one end of a resistor R7 respectively; The other end of the capacitor C12 is connected with a sixth power supply VCC6; The other end of the resistor R7 is grounded; The fifteenth pin, the eighth pin and the fourth pin of the frequency divider U6 are grounded after converging; The sixteenth pin of the frequency divider U6 is connected with a seventh power supply VCC7; The third pin of the frequency divider U6 is connected with a control signal input end CONTROL_UP1 in the first thyristor output circuit (300); The second pin of the frequency divider U6 is connected with the control signal input end CONTROL_UP2 in the second thyristor output circuit (400); The first thyristor output circuit (300) comprises a control signal input end CONTROL_UP1, an optocoupler U7, a thyristor Q1 and an alternating current transformer L1; The control signal input end CONTROL_UP1 is connected with the third pin of the frequency divider U6 in the reversible counter circuit (200); The control signal input end CONTROL_UP1 is connected with the second pin of the optocoupler U7 through the resistor R3; The first pin of the optocoupler U7 is connected with the eighth power supply VCC8; The sixth pin of the optocoupler U7 is connected with one end of the resistor R12; The fourth pin of the optocoupler U7 is connected with the third pin of the thyristor Q1; A resistor R13 is connected between the third pin and the first pin of the thyristor Q1; The other end of the resistor R12 is connected with the second pin of the thyristor Q1, one end of the resistor R14 and the alternating current voltage input end AC_INPUT1 respectively; The first pin of the thyristor Q1 is also connected with one end of the capacitor C17 and the third port of the primary side of the alternating current transformer L1 respectively; The other end of the resistor R14 is connected with the other end of the capacitor C17; A light emitting diode LED3 is connected between the first port and the second port of the secondary side of the alternating current transformer L1; The fourth port of the primary side of the alternating current transformer L1 is connected with the alternating current voltage output end AC_OUTPUT1; The alternating current voltage input end AC_INPUT1 is connected with the live wire of the secondary side of the existing snow melting transformer; The alternating current voltage output end AC_OUTPUT1 is connected with the live wire of the input power port of the existing electric heating element; The zero line of the power input port of the existing electric heating element is connected with the zero line of the secondary side of the existing snow melting transformer; The second thyristor output circuit (400) comprises a control signal input end CONTROL_UP2, an optocoupler U9, a thyristor Q3 and an alternating current transformer L2; The control signal input end CONTROL_UP2 is connected with the second pin of the frequency divider U6 in the reversible counter circuit (200); The control signal input end CONTROL_UP2 is connected with the second pin of the optocoupler U9 through the resistor R5; The first pin of the optocoupler U9 is connected with the ninth power supply VCC9; The sixth pin of the optocoupler U9 is connected with one end of the resistor R18; The fourth pin of the optocoupler U9 is connected with the third pin of the thyristor Q3; A resistor R19 is connected between the third pin and the first pin of the thyristor Q3; The other end of the resistor R18 is connected with the second pin of the thyristor Q3, one end of the resistor R20 and the alternating current voltage input end AC_INPUT2 respectively; The first pin of the thyristor Q3 is also connected with one end of the capacitor C19 and the third port of the primary side of the alternating current transformer L2 respectively; The other end of the resistor R20 is connected with the other end of the capacitor C19; A light emitting diode LED4 is connected between the first port and the second port of the secondary side of the alternating current transformer L2; The fourth port of the primary side of the AC transformer L2 is connected with the AC voltage output end AC_OUTPUT2; The AC voltage input end AC_INPUT2 is connected with the live wire of the secondary side of the existing snow melting transformer; The AC voltage output end AC_OUTPUT2 is connected with the input power port live wire of the newly added electric heating element; The power input port zero line of the newly added electric heating element is connected with the zero line of the secondary side of the existing snow melting transformer.

2. The power conditioning module of claim 1, wherein, The time base circuit (100) comprises a timing chip U3 and a first power supply VCC1; The first power supply VCC1 is connected with one end of the variable resistor W1, the fourth pin and the eighth pin of the timing chip U3 respectively; The other end of the variable resistor W1 is connected with the seventh pin of the timing chip U3 and one end of the resistor R2 respectively; The other end of the resistor R2 is connected with the first pin, the second pin and the sixth pin of the timing chip U3 and the positive pole of the polarity capacitor C6 respectively; The negative pole of the polarity capacitor C6 is grounded; The first pin, the second pin and the sixth pin of the timing chip U3 are grounded after converging; The fifth pin of the timing chip U3 is grounded through the capacitor C5.

3. The power conditioning module of claim 1, wherein, The second pin, the third pin, the sixth pin and the seventh pin of the reversible counter chip U4 are vacant; The second pin, the third pin, the sixth pin and the seventh pin of the reversible counter chip U5 are vacant; The seventh pin, the tenth pin, the first pin, the fifth pin, the sixth pin, the ninth pin, the eleventh pin and the twelfth pin of the frequency divider U6 are vacant.

4. The power conditioning module of claim 1, wherein, The third pin and the fifth pin of the optocoupler U7 are vacant.

5. The power conditioning module of claim 1, wherein, The third pin and the fifth pin of the optocoupler U9 are vacant.

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