Transformer winding turntable drying circuit system

Abstract

The utility model discloses a transformer winding turntable drying circuit system, which comprises three-phase power supplies L1, L2 and L3 and a grounding wire PE, and is characterized in that the three-phase power supplies are connected into a system through a main circuit breaker QF; the conveyor belt motor control loop comprises a contactor KM1, a contactor KM3, a thermal relay FR1 and a conveyor belt motor M1; the turntable motor control loop comprises a contactor KM2, a thermal relay FR2 and a turntable motor M2; the airflow control loop comprises an electromagnetic valve EV; the conveying control unit is used for controlling the conveying belt motor M1 to rotate forwards so as to convey the transformer winding to the position of the rotating disc. The turntable drying control unit is used for controlling a turntable motor M2 and an electromagnetic valve EV to work to realize turntable rotation and pneumatic drying; and the output control unit is used for controlling the conveyor belt motor M1 to rotate reversely so as to output the dried transformer winding. Uniform drying of all positions of the winding is achieved through rotation of the rotating disc, and the consistency of the drying process of the transformer winding is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment manufacturing, especially a transformer winding carousel drying circuit system applied to the drying process of transformer winding in the field of industrial automation and power equipment manufacturing. BACKGROUND

[0002] The transformer is an important electrical equipment in the power system, and the insulation performance of its coil winding directly affects the operation safety and service life of the transformer. In the manufacturing process of the transformer, the coil winding often contains a certain amount of moisture, which seriously affects the insulation performance, so full drying treatment must be carried out. The drying of the transformer winding is a key process link in the manufacturing of the transformer, which is directly related to the product quality and operation reliability.

[0003] The traditional drying of the transformer winding is mostly manually or semi-automatically operated, and the operator needs to manually control the winding conveying, carousel rotation, airflow starting and stopping, winding output and other processes, which not only has low work efficiency, but also leads to unstable drying quality due to human factors. The existing transformer winding carousel drying system has the following problems:

[0004] Firstly, the operation process relies on manual control, and it is impossible to ensure that the conveying time, drying time and output time of each winding are completely consistent, resulting in large differences between product batches. Secondly, the coordination between the carousel rotation and the airflow control is poor, and manual operation cannot achieve accurate synchronization, affecting the uniformity of the drying effect. Thirdly, the positioning accuracy of the winding on the carousel is not high, and manual operation can easily cause the winding position to deviate, affecting the drying quality. Fourthly, the traditional drying process lacks automatic protection mechanism, and cannot stop in time when encountering abnormal conditions, increasing the risk of equipment damage and safety accidents. Fifthly, manual operation requires workers to repeat monotonous operations for a long time, which is easy to cause fatigue and increase the risk of operation errors. Sixthly, in the carousel drying process, the heating of the winding at each position is not uniform, and the traditional control method cannot guarantee the best matching of the rotation speed and airflow intensity.

[0005] In addition, the traditional method cannot adapt to the production demand of large quantities and high quality, which restricts the efficiency improvement of the transformer manufacturing enterprise. Therefore, it is of important practical value to develop a transformer winding carousel drying circuit system that can automatically control the conveying, carousel drying, output of the whole process, ensure the consistency of the drying quality, improve the production efficiency and have perfect protection function. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a transformer winding carousel drying circuit system, which can automatically control the winding conveying, carousel rotation, airflow drying and winding output and other work processes, realize the uniform drying of the winding at each position through the rotation of the carousel, and ensure the consistency of the drying process of the transformer winding.

[0007] The above technical purpose of the utility model is realized through the following technical scheme:

[0008] A transformer winding carousel drying circuit system, comprising: three-phase power supply L1, L2, L3 and ground wire PE, the three-phase power supply is connected to the system through the total circuit breaker QF;The system comprises: a conveyor belt motor control loop, a carousel motor control loop, an air flow control loop and a sequence control loop;Among them, the conveyor belt motor control loop comprises contactor KM1, contactor KM3, thermal relay FR1 and conveyor belt motor M1;The carousel motor control loop comprises contactor KM2, thermal relay FR2 and carousel motor M2;The air flow control loop comprises electromagnetic valve EV;The sequence control loop comprises a start control unit, a conveying control unit, a carousel drying control unit and an output control unit;The conveying control unit is used for controlling the forward rotation of the conveyor belt motor M1 to convey the transformer winding to the carousel position;The carousel drying control unit is used for controlling the carousel motor M2 and the electromagnetic valve EV to work to realize the rotation of the carousel and the air flow drying;The output control unit is used for controlling the reverse rotation of the conveyor belt motor M1 to output the dried transformer winding.

[0009] The utility model further sets up: start control unit includes reset switch SB2 and start relay KA, reset switch SB2 is connected with the winding of start relay KA, when pressing reset switch SB2, start relay KA gets electricity, and its self locking contact 1-2 closes and makes start circuit connect and keep self locking state, and its control contact 3-4 closes and starts subsequent process.

[0010] The utility model further sets up: conveying control unit includes start relay KA, time relay KT1 and contactor KM1, when the contact 3-4 of start relay KA closes, the winding of time relay KT1 and contactor KM1 gets electricity simultaneously;The main contact of contactor KM1 is connected with conveyor belt motor M1, and is used for driving the forward rotation work of conveyor belt motor, and conveys the transformer winding to the carousel position;Time relay KT1 is used for controlling conveying time.

[0011] The utility model further sets up: time relay KT1 has normally open contact 9-10 and normally closed contact 7-8, when time relay KT1 delay ends, its normally open contact 9-10 closes, and start carousel drying control unit;Its normally closed contact 7-8 is disconnected, and makes contactor KM1 lose electricity, and conveyor belt motor M1 stops running.

[0012] The utility model further sets up: the rotary table drying control unit includes time relay KT2, contactor KM2 and electromagnetic valve EV, when the normally open contact 9-10 of time relay KT1 is closed, time relay KT2, contactor KM2 and electromagnetic valve EV are powered simultaneously, the main contact of contactor KM2 is connected with rotary table motor M2, is used for driving rotary table motor work to make rotary table rotate, electromagnetic valve EV is used for controlling the airflow to spray, and the drying of transformer winding in rotation is carried out.

[0013] The utility model further sets up: time relay KT2 has normally open contact 11-12 and normally closed contact 15-16, when time relay KT2 delay ends, its normally open contact 11-12 is closed, and the output control unit is started, its normally closed contact 15-16 is disconnected, and contactor KM2 and electromagnetic valve EV are powered off, and rotary table motor M2 stops running, and airflow stops spraying.

[0014] The utility model further sets up: the output control unit includes time relay KT3 and contactor KM3, when the normally open contact 11-12 of time relay KT2 is closed, time relay KT3 and the winding of contactor KM3 are powered simultaneously, the main contact of contactor KM3 is connected with conveyor belt motor M1 reverse, is used for driving conveyor belt motor reverse work, and the output of the drying transformer winding.

[0015] The utility model further sets up: time relay KT3 has normally closed contact 19-20, when time relay KT3 delay ends, its normally closed contact 19-20 is disconnected, and starting relay KA is powered off, and the whole control circuit is powered off, and a complete drying period is completed.

[0016] The utility model further sets up: the system still includes protection unit, and the protection unit includes thermal relay FR1 and thermal relay FR2, is used for monitoring the working current of conveyor belt motor M1 and rotary table motor M2 and is cut off in overload situation Power, and the motor is protected from damage.

[0017] The utility model further sets up: time relay KT1 is power-on delay type relay, is used for controlling the conveying time of transformer winding, guarantees winding to start rotary table drying procedure after accurate conveying to rotary table position.

[0018] The utility model further sets up: time relay KT2 is power-on delay type relay, is used for controlling the working time of rotary table motor M2 and electromagnetic valve EV, guarantees the drying of transformer winding fully.

[0019] The utility model further sets up: time relay KT3 is power-on delay type relay, is used for controlling the output time of the drying transformer winding, guarantees the automatic reset of system after winding complete output.

[0020] The utility model further sets up: conveying belt motor M1 and carousel motor M2 all are three phase asynchronous motor, pass through three phase power supply L1, L2, L3 power supply, and the U1, V1, W1 terminal of motor is connected with three phase power supply through the main contact of thermal relay and contactor, and the motor housing is grounded through PE terminal, guarantees the safe operation of equipment.

[0021] The utility model further sets up: electromagnetic valve EV is pneumatic electromagnetic valve, and the start-stop of airflow is realized through the on-off control of compressed air, and the uniform dry airflow is provided for the transformer winding in rotation, and the consistency of drying effect is guaranteed.

[0022] The utility model further sets up: reset switch SB2 adopts self-resetting type design, and automatically pops up after pressing, avoids the misoperation;Start relay KA has self-locking function, guarantees the stable power-on state of control circuit in the working process, guarantees the continuity of whole drying period.

[0023] In conclusion, the utility model has the following beneficial effects:

[0024] High degree of automation control: the system realizes the full-automatic control of winding conveying, carousel drying and winding output through the sequence control loop, and only needs to press reset switch SB2 to complete a complete working cycle, greatly reduces the manual operation intensity, improves the working efficiency and operation convenience. Compared with the traditional manual control mode, the degree of automation is improved.

[0025] Good drying quality consistency: the system adopts time relay KT1, KT2 and KT3 to accurately control the time of each process, guarantees that the conveying time, drying time and output time of each transformer winding are completely consistent, overcomes the problem that manual operation is difficult to guarantee consistency, and improves the stability of product quality.

[0026] Excellent carousel drying effect: the system drives the carousel to rotate through carousel motor M2, and controls airflow to spray out through electromagnetic valve EV, realizes the all-around uniform drying of winding in the rotating process, compared with the static drying mode, the drying efficiency is improved, and the drying uniformity is improved.

[0027] Accurate process linkage: through the cascade control of time relay KT1, KT2 and KT3 and the accurate conversion of contact state, the system realizes the accurate linkage of conveying, drying, output and other processes, and each process is accurately and timely converted, avoids the delay and instability of process switching in the traditional manual control, and shortens the drying cycle time.

[0028] High starting control reliability: the system uses the self-locking function of the starting relay KA to ensure stable operation after system startup, and the reset switch SB2 is designed with a self-resetting type to effectively avoid misoperation, greatly improving the reliability and safety of the system.

[0029] Safe and reliable protection: the system integrates a perfect protection mechanism, including overload protection of the motor by the thermal relays FR1 and FR2, total power protection by the total circuit breaker QF, and startup protection by the self-locking and reset functions of the starting relay KA, effectively preventing equipment damage and safety accidents.

[0030] Flexible motor control: the system controls the forward and reverse rotation of the conveyor belt motor M1 through the contactors KM1 and KM3, respectively, to realize automatic input and output of the winding, and controls the start and stop of the turntable motor M2 through the contactor KM2 to realize precise control of the turntable rotation.

[0031] Precise airflow control: the system precisely controls the start and stop of the drying airflow through the electromagnetic valve EV, which works synchronously with the turntable motor M2 to ensure continuous and stable drying airflow during the rotation of the turntable, improving the consistency of the drying effect. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The circuit principle diagram of the transformer winding turntable drying circuit system. DETAILED DESCRIPTION

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] As shown in Figure 1 The transformer winding turntable drying circuit system provided by the present application comprises three-phase power supply L1, L2, L3 and ground PE, which is connected to the system through the total circuit breaker QF. The system mainly consists of a conveyor belt motor control circuit, a turntable motor control circuit, an airflow control circuit and a sequence control circuit.

[0035] The conveyor motor control loop includes contactor KM1, contactor KM3, thermal relay FR1 and conveyor motor M1. Conveyor motor M1 is a three-phase asynchronous motor with a rated power of generally 1.5-3 kW, which is connected with a three-phase power supply through the main contacts of contactor KM1 and KM3. Contactor KM1 controls the forward rotation of the motor, which is used to deliver the transformer winding to the carousel position; contactor KM3 controls the reverse rotation of the motor, which is used to output the dried winding. Thermal relay FR1 is connected in series with conveyor motor M1, which is used to monitor the working current of the motor and automatically disconnect the circuit when the motor is overloaded to protect the motor from damage.

[0036] The carousel motor control loop includes contactor KM2, thermal relay FR2 and carousel motor M2. Carousel motor M2 is a three-phase asynchronous motor with a rated power of generally 2-4 kW, which is connected with a three-phase power supply through the main contacts of contactor KM2. Thermal relay FR2 is connected in series with carousel motor M2, which is used for overload protection. The carousel motor is used to drive the rotation of the carousel to continuously rotate the transformer winding placed on the carousel during the drying process, so as to achieve uniform drying at each position.

[0037] The air flow control loop includes electromagnetic valve EV. Electromagnetic valve EV is a pneumatic electromagnetic valve, which controls the on-off of compressed air, opens the air path when powered on to spray dry air flow, and closes the air path when powered off to stop air flow. The electromagnetic valve works synchronously with carousel motor M2 to ensure the continuous supply of dry air flow during the rotation of the carousel.

[0038] The sequence control loop includes a start control unit, a conveying control unit, a carousel drying control unit and an output control unit.

[0039] The start control unit includes reset switch SB2 and start relay KA. The operator presses reset switch SB2, the winding of start relay KA is powered on, the self-locking contact 1-2 of start relay KA is closed, the start circuit is turned on and kept in a self-locking state. At the same time, the control contact 3-4 is closed to start the subsequent conveying control unit. Reset switch SB2 is designed in a self-resetting manner, which automatically pops up after being pressed to avoid short circuit caused by long-term pressing.

[0040] The conveying control unit includes start relay KA, time relay KT1 and contactor KM1. When the contact 3-4 of start relay KA is closed, the windings of time relay KT1 and contactor KM1 are powered on at the same time. The main contact of contactor KM1 is closed, and conveyor motor M1 starts to work in the forward rotation to deliver the transformer winding to the specified position of the carousel. Time relay KT1 starts timing, and the delay time is generally set to 10-30 seconds to control the conveying time and ensure the accurate positioning of the winding.

[0041] The rotary-drying control unit includes time relay KT2, contactor KM2 and solenoid valve EV. When the conveying is completed and the time delay of time relay KT1 ends, its normally open contact 9-10 is closed and normally closed contact 13-14 is opened. The opening of normally closed contact 13-14 makes contactor KM1 lose power and the conveying belt motor M1 stops running. The closing of normally open contact 9-10 makes the windings of time relay KT2, contactor KM2 and solenoid valve EV get power at the same time. The main contact of contactor KM2 is closed and the rotary-disk motor M2 starts to work to drive the rotary disk to rotate. At the same time, the solenoid valve EV gets power to act and open the air path to spray the drying air flow. The rotary-disk motor and the air flow system work in coordination to uniformly dry the rotating transformer winding. The time delay of time relay KT2 is determined according to the winding specification and drying requirement and is generally set to 60-180 minutes.

[0042] The output control unit includes time relay KT3 and contactor KM3. When the drying is completed and the time delay of time relay KT2 ends, its normally open contact 11-12 is closed and normally closed contact 15-16 is opened. The opening of normally closed contact 15-16 makes contactor KM2 and solenoid valve EV lose power, the rotary-disk motor M2 stops running and the air flow stops spraying. The closing of normally open contact 11-12 makes the windings of time relay KT3 and contactor KM3 get power at the same time. The main contact of contactor KM3 is closed and the conveying belt motor M1 starts to reverse to output the dried transformer winding. The time delay of time relay KT3 is generally set to 10-30 seconds to ensure the complete output of the winding.

[0043] When the output is completed and the time delay of time relay KT3 ends, its normally closed contact 19-20 is opened, the starting relay KA loses power, the whole control circuit loses power and the system completes a complete drying cycle and automatically resets to prepare for the next drying.

[0044] The detailed working process of the system is as follows:

[0045] Preparation stage: the operator places the transformer winding to be dried at the starting position of the conveying belt and fixes it, checks whether the winding position is correct, then turns on the power and closes the main circuit breaker QF, and the system is in standby state. At this time, all contactors and solenoid valves are in power-off state and all time relays are in reset state.

[0046] Starting stage: the operator presses the reset switch SB2 and the starting relay KA gets power, its self-locking contact 1-2 is closed, the control circuit is connected and kept in self-locking state. At the same time, the control contact 3-4 is closed and the system starts to work.

[0047] Transport stage: the contact 3-4 of the starting relay KA is closed, and the time relay KT1 and the contactor KM1 are powered at the same time. The main contact of the contactor KM1 is closed, and the transport belt motor M1 starts to rotate in the positive direction, transporting the transformer winding to the rotating disc position. The time relay KT1 starts timing, and the delay time is 10-30 seconds, ensuring that the winding is accurately transported to the position.

[0048] Rotating disc drying stage: when the time relay KT1 delay time ends, its normally open contact 9-10 is closed, and the normally closed contact 13-14 is disconnected. The contactor KM1 loses power and the transport belt motor M1 stops running. At the same time, the time relay KT2, the contactor KM2 and the electromagnetic valve EV are powered. The rotating disc motor M2 starts to work, driving the rotating disc to rotate continuously, so that the transformer winding is uniformly heated at each position during rotation. The electromagnetic valve EV opens and emits a stable drying gas flow. The rotating disc rotation and the gas flow drying are synchronized to achieve high-efficiency and uniform drying effect. The time relay KT2 is timing, and the delay time is 60-180 minutes, ensuring sufficient drying.

[0049] Output stage: when the time relay KT2 delay time ends, its normally open contact 11-12 is closed, and the normally closed contact 15-16 is disconnected. The rotating disc motor M2 and the electromagnetic valve EV lose power and stop working. At the same time, the time relay KT3 and the contactor KM3 are powered. The main contact of the contactor KM3 is closed, and the transport belt motor M1 starts to rotate in the reverse direction to output the dried transformer winding. The time relay KT3 is timing, and the delay time is 10-30 seconds, ensuring that the winding is completely output.

[0050] Reset complete stage: when the time relay KT3 delay time ends, its normally closed contact 19-20 is disconnected, and the starting relay KA loses power. The entire control circuit is powered off. All contactors and electromagnetic valves are powered off and reset, and each time relay is automatically reset, so that the system returns to the initial state and is ready for the next drying cycle.

[0051] Key technical parameter settings of the system:

[0052] The delay time of the time relay KT1 determines the transport time, which needs to be adjusted according to the length of the transport belt and the winding specifications. For small windings, the transport time is set to 10-15 seconds; for medium windings, the transport time is set to 15-25 seconds; for large windings, the transport time is set to 25-30 seconds.

[0053] The delay time of the time relay KT2 determines the drying time, which needs to be adjusted according to the moisture content of the winding, the type of insulation material and the drying requirements. Generally, the drying time of paper insulation winding is 90-120 minutes, the drying time of oil-paper insulation winding is 120-180 minutes, and the drying time of epoxy resin insulation winding is 60-90 minutes.

[0054] The time relay KT3 determines the output time, and needs to ensure that the winding can be fully output without blocking. Usually, it is set to 10-30 seconds, and the specific time is adjusted according to the mechanical characteristics of the conveying belt.

[0055] The power and rotating speed of the conveying belt motor M1 need to be determined according to the conveying load, and a 1.5-3kW three-phase asynchronous motor is generally selected, with a rotating speed of 960-1450rpm, which can provide stable conveying force.

[0056] The power and rotating speed of the rotating disc motor M2 need to be determined according to the size and load of the rotating disc, and a 2-4kW three-phase asynchronous motor is generally selected, with a rotating speed of 480-960rpm, which can ensure the stable rotation of the rotating disc.

[0057] The selection of the electromagnetic valve EV needs to be determined according to the gas source pressure and flow requirement, and a pneumatic electromagnetic valve with a working pressure of 0.4-0.8MPa is generally selected to ensure that sufficient dry gas flow is provided.

[0058] The transformer winding rotating disc drying circuit system of the utility model adopts a relay logic control structure, has the characteristics of simple circuit, high reliability and convenient maintenance. Compared with the traditional manual or semi-automatic drying method, the utility model realizes completely automatic control, not only improves the production efficiency, but also ensures the consistency of the drying quality. The system realizes the all-around uniform drying of the winding through the rotation of the rotating disc, and has better effect and higher efficiency than the static drying method.

[0059] The utility model can be widely applied to the drying treatment of various specifications of transformer windings, and through adjusting the time delay parameters of the time relay and the operation parameters of the motor, the winding processing requirements of different specifications and drying requirements can be adapted. The system can also add temperature monitoring, humidity monitoring and other functional modules according to requirements, and further improve the intelligent level of the drying process.

[0060] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A transformer winding turntable drying circuit system, characterized in that: include: Three-phase power supply L1, L2, L3 and grounding wire PE, the three-phase power supply is connected to the system through the main circuit breaker QF; the system includes: a conveyor belt motor control circuit, a turntable motor control circuit, an airflow control circuit and a sequence control circuit; wherein, the conveyor belt motor control circuit includes contactor KM1, contactor KM3, thermal relay FR1 and conveyor belt motor M1; the turntable motor control circuit includes contactor KM2, thermal relay FR2 and turntable motor M2; the airflow control circuit includes a solenoid valve EV; the sequence control circuit includes a start control unit, a conveying control unit, a turntable drying control unit and an output control unit; the conveying control unit is used to control the forward rotation of the conveyor belt motor M1 to convey the transformer winding to the turntable position; the turntable drying control unit is used to control the turntable motor M2 and the solenoid valve EV to realize turntable rotation and airflow drying; the output control unit is used to control the reverse rotation of the conveyor belt motor M1 to output the dried transformer winding.

2. The transformer winding turntable drying circuit system according to claim 1, characterized in that: The starting control unit includes a reset switch SB2 and a starting relay KA; the reset switch SB2 is connected to the winding of the starting relay KA; when the reset switch SB2 is pressed, the starting relay KA is energized, its self-locking contacts 1-2 are closed to connect the starting circuit and maintain the self-locking state, and its control contacts 3-4 are closed to start the subsequent process.

3. The transformer winding turntable drying circuit system according to claim 2, characterized in that: The conveying control unit includes a starting relay KA, a time relay KT1 and a contactor KM1; when the contacts 3-4 of the starting relay KA are closed, the windings of the time relay KT1 and the contactor KM1 are energized at the same time; the main contacts of the contactor KM1 are connected to the conveyor belt motor M1, which is used to drive the conveyor belt motor to rotate forward and transport the transformer winding to the turntable position; the time relay KT1 is used to control the conveying time.

4. The transformer winding turntable drying circuit system according to claim 3, characterized in that: The time relay KT1 has normally open contacts 9-10 and normally closed contacts 7-8; when the time relay KT1 delay ends, its normally open contacts 9-10 close and start the turntable drying control unit; its normally closed contacts 7-8 open, causing the contactor KM1 to lose power and the conveyor belt motor M1 to stop running.

5. The transformer winding turntable drying circuit system according to claim 4, characterized in that: The turntable drying control unit includes a time relay KT2, a contactor KM2 and a solenoid valve EV; when the normally open contacts 9-10 of the time relay KT1 are closed, the time relay KT2, the contactor KM2 and the solenoid valve EV are energized at the same time; the main contact of the contactor KM2 is connected to the turntable motor M2, which is used to drive the turntable motor to rotate the turntable; the solenoid valve EV is used to control the airflow to dry the rotating transformer winding.

6. The transformer winding turntable drying circuit system according to claim 5, characterized in that: The time relay KT2 has normally open contacts 11-12 and normally closed contacts 15-16; when the delay of the time relay KT2 ends, its normally open contacts 11-12 close and start the output control unit; its normally closed contacts 15-16 open, causing the contactor KM2 and the solenoid valve EV to lose power, the turntable motor M2 stops running, and the airflow stops being ejected.

7. The transformer winding rotary table drying circuit system according to claim 6, characterized in that: The output control unit includes a time relay KT3 and a contactor KM3; when the normally open contacts 11-12 of the time relay KT2 are closed, the windings of the time relay KT3 and the contactor KM3 are energized at the same time; the main contacts of the contactor KM3 are reversely connected to the conveyor belt motor M1, which is used to drive the conveyor belt motor to reverse and output the dried transformer winding.

8. The transformer winding turntable drying circuit system according to claim 7, characterized in that: The time relay KT3 has normally closed contacts 19-20; when the time relay KT3 delay ends, its normally closed contacts 19-20 are disconnected, causing the start relay KA to lose power, the entire control circuit to be powered off, and a complete drying cycle to be completed.

9. The transformer winding rotary table drying circuit system according to claim 1, characterized in that: The system further includes a protection unit; the protection unit includes a thermal relay FR1 and a thermal relay FR2, which are respectively used to monitor the operating current of the conveyor belt motor M1 and the turntable motor M2 and cut off the power supply in the event of overload to protect the motors from damage.

10. The transformer winding turntable drying circuit system according to claim 3, characterized in that: The time relay KT1 is a power-on delay type relay, which is used to control the transmission time of the transformer winding to ensure that the winding is accurately transported to the turntable position and then the turntable drying process is started; the time relay KT2 is a power-on delay type relay, which is used to control the working time of the turntable motor M2 and the solenoid valve EV to ensure that the transformer winding is fully dried; the time relay KT3 is a power-on delay type relay, which is used to control the output time of the transformer winding after drying to ensure that the system automatically resets after the winding is fully output.

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