Moisture-removing, drying and lifting insulation instrument for motor stator

Abstract

A motor stator moisture-removing, drying and lifting insulation instrument comprises a temperature control device (1), a group of pipe racks (2), an electric heating pipe (3) and a fan (4), the temperature control device (1) is electrically connected with the electric heating pipe (3) and the fan (4), the temperature control device (1) is used for controlling the heating temperature of the electric heating pipe (3) and the rotating speed of the fan (4), the group of pipe racks (2) are placed in a motor stator, the electric heating pipe (3) is placed on the group of pipe racks (2), and the fan (4) is electrically connected with the electric heating pipe (3). The electric heating pipe (3) is located in the center of the motor stator, and the fan (4) is placed on one side of the motor stator and supplies air to an inner cavity of the motor stator; the motor stator drying device has the advantages that the drying efficiency is improved, the motor stator can be dried more quickly through an accurate temperature control system and a three-gear temperature heating conversion function, and the drying time is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor maintenance equipment field, concretely relates to a motor stator moisture drying and insulation instrument of drying promotion. BACKGROUND

[0002] At present, in the use process of motor, due to environmental humidity, operating condition and various factors, the motor stator is easy to accumulate moisture, which leads to the decline of insulation performance, and further affects the normal operation of motor. The traditional drying method often needs to move the motor to the special drying equipment for processing, which is not only cumbersome, but also low in efficiency. Therefore, it is particularly important to develop a device that can efficiently dry the motor stator and improve the insulation performance on site. As an indispensable equipment in modern industry, the motor stator insulation performance is directly related to the operation reliability and service life of the motor. The traditional stator insulation heating method has many defects, for example, using welding tool heating will cause the deformation of the stator, furnace heating will lead to uneven heating of each part of the stator, oil bath heating is easy to pollute the stator due to unclean oil, and oven heating takes a long time. Therefore, there is an urgent need for a new motor stator insulation heating instrument in the market to overcome the shortcomings of traditional heating methods and improve the heating efficiency and quality. SUMMARY

[0003] The utility model discloses a motor stator moisture drying and insulation instrument is provided to solve the above problems.

[0004] The utility model discloses a temperature control device, a group of pipe frame, electric heating tube and fan,

[0005] The temperature control device is electrically connected with the electric heating tube and the fan, and is used for controlling the heating temperature of the electric heating tube and the rotating speed of the fan. The group of pipe frames are placed in the motor stator, the electric heating tube is placed on the group of pipe frames, the electric heating tube is located at the center of the motor stator, and the fan is placed on one side of the motor stator and blows air into the inner cavity of the motor stator.

[0006] The group of pipe frames comprises an inner ring and a group of supporting feet, a group of adjusting sleeves are evenly arranged in a ring shape on the outer wall of the inner ring, a through nail hole is formed in the wall of the adjusting sleeve, an adjusting rod is arranged on the supporting foot, a group of positioning holes are arranged in sequence on the adjusting rod, the adjusting rod is inserted into the corresponding adjusting sleeve, the locking nail is inserted into the positioning hole through the through nail hole to fix the adjusting rod, the electric heating tube is placed in the inner ring, and the electric heating tube is supported by the inner ring.

[0007] The supporting feet are cylindrical magnetic supporting feet.

[0008] The temperature control device comprises a box body, a three-gear AC contactor, a gear shifting switch, an A-phase inlet, a B-phase inlet, a C-phase inlet and an N connecting port,

[0009] The three-gear AC contactor is installed at the bottom of the box body, and the three-gear AC contactor, the gear conversion switch, the A-phase inlet, the B-phase inlet, the C-phase inlet and the N connection port are installed on the box cover of the box body.

[0010] The box cover of the box body is provided with an alarm sound, a three-phase air switch, a timer, a temperature controller, a test ammeter, a speed regulator, a running lamp, a stop lamp, a starting switch, a stop switch and a grounding terminal.

[0011] The fan is electrically connected with the C-phase inlet and the N connection port through the speed regulator.

[0012] The A-phase inlet, the B-phase inlet and the C-phase inlet are electrically connected with the three-phase air switch.

[0013] The three-gear AC contactor is composed of a low-gear AC contactor, a middle-gear AC contactor and a high-gear AC contactor,

[0014] The low-heat-gear wiring end of the electric heating pipe is electrically connected with the A-phase inlet, the B-phase inlet and the C-phase inlet through the low-gear AC contactor,

[0015] The middle-heat-gear wiring end of the electric heating pipe is electrically connected with the A-phase inlet, the B-phase inlet and the C-phase inlet through the middle-gear AC contactor,

[0016] The high-heat-gear wiring end of the electric heating pipe is electrically connected with the A-phase inlet, the B-phase inlet and the C-phase inlet through the high-gear AC contactor.

[0017] The gear conversion switch, the alarm sound, the timer, the temperature controller, the running lamp and the stop lamp are electrically connected with the C-phase inlet through the three-gear AC contactor.

[0018] The starting switch and the stop switch are connected on the output line of the C-phase inlet.

[0019] The utility model discloses the advantages are:

[0020] 1. Improve drying efficiency: through the accurate temperature control system and three-gear temperature heating conversion function, can more quickly dry motor stator, shorten drying time.

[0021] 2. Improve insulation performance: during the drying process, the temperature can be kept in a safe and effective range, avoiding the influence of overheating or overcooling on the insulation performance of the motor, thereby improving the insulation performance of the motor.

[0022] 3. Simple operation: through the integrated control equipment and the magnetic attraction telescopic support frame, the installation, disassembly and operation process are more convenient and fast.

[0023] 4. Strong applicability: the application is applicable to drying treatment of motors of different insulation levels, and has wide application prospects.

[0024] 5. Low energy consumption: the temperature control heating mode is adopted, and the energy consumption is significantly reduced compared with the traditional heating mode.

[0025] 6. High working efficiency: the heating time is short, only less than one fourth of the traditional heating mode.

[0026] 7. Uniform heating: the heating is very uniform through fan circulation and heater heating, which is beneficial to improve the heating safety.

[0027] 8. Clean and environmentally friendly: no open fire, no smoke dust and no harmful gas during heating, and no thermal radiation to the surrounding environment, which is beneficial to environmental improvement and the health of workers. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the application.

[0029] Figure 2 is a structural schematic diagram of the pipe rack of the application.

[0030] Figure 3 is a structural schematic diagram of the electric heating pipe of the application.

[0031] Figure 4 is a structural schematic diagram of the fan of the application.

[0032] Figure 5 is a structural schematic diagram of the temperature control device of the application.

[0033] Figure 6 is a structural schematic diagram of the box cover of the application.

[0034] Figure 7 is a structural schematic diagram of the power supply circuit of the electric heating pipe and the fan of the application.

[0035] Figure 8 is a structural schematic diagram of the adjusting, displaying and alarming circuit of the application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the application without creative labor fall within the scope of the application.

[0038] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0039] In the description of the embodiments of the application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, if the terms "first", "second" and the like appear in the description of the application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "set", "connect" are broadly understood, for example, they can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0041] As shown in the drawings, the utility model includes temperature control device 1, a group of pipe frame 2, electric heating tube 3 and fan 4,

[0042] The temperature control device 1 is electrically connected with the electric heating tube 3 and the fan 4, and the temperature control device 1 is used to control the heating temperature of the electric heating tube 3 and the rotating speed of the fan 4. The group of pipe frames 2 is placed in the motor stator, the electric heating tube 3 is placed on the group of pipe frames 2, the electric heating tube 3 is located at the center of the motor stator, and the fan 4 is placed on one side of the motor stator and faces the inner cavity of the motor stator to send air.

[0043] The group pipe frame 2 comprises an inner ring 5 and a group of supporting feet 6, a group of adjusting sleeves 7 are arranged on the outer wall of the inner ring 5 in a ring shape, a through nail hole is formed on the sleeve wall of the adjusting sleeve 7, an adjusting rod 8 is arranged on the supporting foot 6, a group of positioning holes are arranged on the adjusting rod 8 in sequence, the adjusting rod 8 is inserted into the corresponding adjusting sleeve 7, the locking nail is inserted into the positioning hole through the through nail hole to fix the adjusting rod 8, and the electric heating pipe 3 is placed into the inner ring 5 to support the electric heating pipe 3 through the inner ring 5.

[0044] The supporting foot 6 is a cylindrical magnetic supporting foot.

[0045] The temperature control device 1 comprises a box body 9, a three-gear AC contactor 10, a gear shifting switch 11, an A-phase inlet 12, a B-phase inlet 13, a C-phase inlet 14 and an N connecting port 15,

[0046] The three-gear AC contactor 10 is installed at the bottom of the box body 9, and the three-gear AC contactor 10, the gear shifting switch 11, the A-phase inlet 12, the B-phase inlet 13, the C-phase inlet 14 and the N connecting port 15 are respectively installed on the box cover of the box body 9.

[0047] The box cover of the box body 9 is provided with an alarm sound 16, a three-phase air switch 17, a timer 18, a temperature controller 19, a test ammeter 20, a speed regulator 21, a running lamp 22, a stop lamp 23, a starting switch 24, a stop switch 25 and a grounding terminal 26.

[0048] The fan 4 is electrically connected with the C-phase inlet 14 and the N connecting port 15 through the speed regulator 21.

[0049] The A-phase inlet 12, the B-phase inlet 13 and the C-phase inlet 14 are respectively electrically connected with the three-phase air switch 17.

[0050] The three-gear AC contactor 10 is composed of a low-gear AC contactor 27, a middle-gear AC contactor 28 and a high-gear AC contactor 29,

[0051] The low-heat gear wiring end of the electric heating pipe 3 is electrically connected with the A-phase inlet 12, the B-phase inlet 13 and the C-phase inlet 14 through the low-gear AC contactor 27,

[0052] The middle-heat gear wiring end of the electric heating pipe 3 is electrically connected with the A-phase inlet 12, the B-phase inlet 13 and the C-phase inlet 14 through the middle-gear AC contactor 28,

[0053] The high-heat gear wiring end of the electric heating pipe 3 is electrically connected with the A-phase inlet 12, the B-phase inlet 13 and the C-phase inlet 14 through the high-gear AC contactor 29.

[0054] The gear shifting switch 11, the alarm sound 16, the timer 18, the temperature controller 19, the running lamp 22 and the stop lamp 23 are respectively electrically connected with the C-phase inlet 14 through the three-gear AC contactor 10.

[0055] Start switch 24 and stop switch 25 are connected to the output line of C-phase inlet 14 respectively.

[0056] In embodiment 1, the distance between adjusting rod 8 and adjusting sleeve 7 is adjusted according to the diameter of the inner cavity of motor stator 100, so as to adapt to different sizes of motor stator 100. After the adjustment, the distance is fixed by locking nails. Support feet 6 are made of magnets and are magnetically attracted to the silicon steel sheets of motor stator 100. Tube racks 2 are placed at both ends of the inner cavity of motor stator 100. Then, electric heating tubes 3 are inserted into inner ring 5. After the installation of electric heating tubes 3, power supply to electric heating tubes 3 is controlled by temperature control device 1. Electric heating tubes 3 generate heat to dry motor stator 100. During the drying process, fan 4 blows air into the inner cavity of motor stator 100, which enhances the drying effect and ensures uniform moisture removal and heat dissipation.

[0057] As shown in the accompanying drawings, Figure 7 Fan 4 controls the rotating speed through speed regulator 21. AC 220V power supply is provided by C-phase inlet 14 and N connection 15 zero line. The heating resistors of low-grade AC contactor 27, middle-grade AC contactor 28 and high-grade AC contactor 29 are connected in V shape, Y shape and triangle shape respectively.

[0058] As shown in the accompanying drawings, Figure 8 220V control is introduced from C-phase inlet 14,

[0059] Low-grade heating: auxiliary contacts of three-grade AC contactor 10 (kM1, kM2, kM3) are in normally closed state. Stop light 23 (LD) is on, indicating that the heating is not working. Temperature controller 19 is powered and waits for heating command (sets the heating temperature value). The upper limit of the temperature value is set according to the motor insulation grade temperature A, E, B, F, H and C. Turn gear shift switch 11 (LW) to 1st gear left 90 degrees. Gear 1-2 is connected. Press start switch 24 (SB2) to start the button. Temperature controller 19 normally closed contact kM1 coil is powered. kM1 auxiliary contact normally closed is disconnected. Stop light 23 is off. Running light 22 (HD) is on. V-shaped resistor of electric heating tube 3 is powered and works. When the heating reaches the preset temperature, temperature controller 19 normally open contact is closed. Alarm sound 16 sounds an alarm. Temperature controller 19 normally closed contact is disconnected. kM1 coil loses power and stops heating. Stop light 23 (LD) is on. Running light 22 (HD) is off. Turn gear shift switch 11 to 0 position.

[0060] According to the working condition, fan 4 is selected to be turned on to facilitate space moisture removal and heat dissipation. The display of heating time is based on timer 18. After running light 22 is on, press the switch (k1) button of timer 18. Running light 22 is off. After stop light 23 is on, disconnect the switch (k1) button of timer 18. The heating time is obtained.

[0061] Medium-speed heating: The auxiliary contacts of the three-speed AC contactor 10 (kM1, kM2, kM3) are normally closed, the stop light 23 (LD) is lit, indicating that heating is not in operation, and the thermostat 19 is energized and waiting for the heating command (setting the heating temperature value). The upper limit of the temperature value is set according to the motor insulation class temperature A, E, B, F, H, C. Turn the speed change switch 11 (LW) to 180 degrees in the second speed setting, the 3-4 positions are connected, and press the start switch 24 (SB 2) to start. The coil of kM2 is energized through the normally closed contact of the thermostat 19, the normally closed auxiliary contact of kM2 opens, the stop light 23 goes out, and the running light 22 (HD) lights up. The Y-type resistor of the electric heating tube 3 is energized and works. After the preset temperature is reached, the normally open contact of the thermostat 19 closes, the alarm sound 16 sounds, and the normally closed contact of the thermostat 19 opens.

[0062] When coil kM2 loses power, heating stops, stop light 23 (LD) illuminates, and running light 22 (HD) goes out. Turn gear selector switch 11 to position 0. Depending on the working conditions, select to turn on fan 4 to facilitate dehumidification and heat dissipation. The heating time is displayed using timer 18. After running light 22 illuminates, press the switch (k1) button on timer 18. Running light 22 will go out, and stop light 23 will illuminate. Then, turn off the switch (k1) button on timer 18 to obtain the heating duration.

[0063] High-level heating: The auxiliary contacts of the three-position AC contactor 10 (kM1, kM2, kM3) are normally closed, the stop light 23 (LD) is lit, indicating that heating is not in operation, and the thermostat 19 is energized and waiting for a heating command (setting the heating temperature value). The upper limit of the temperature value is set according to the motor insulation class temperature A, E, B, F, H, C. Turning the position selector switch 11 (LW) to position 3 (right 270 degrees) connects positions 5 and 6.

[0064] Press the start button 24 (SB 2). The normally closed contact of thermostat 19 energizes the kM3 coil, causing the normally closed auxiliary contact of kM3 to open, extinguishing the stop light 23 and illuminating the running light 22 (HD). The triangular resistor of the electric heating element 3 is energized. Once the preset temperature is reached, the normally open contact of thermostat 19 closes, triggering an alarm on alarm 16. The normally closed contact of thermostat 19 then opens, de-energizing the kM3 coil and stopping heating. The stop light 23 (LD) illuminates, and the running light 22 (HD) extinguishes. Turn the gear selector switch 11 to position 0. Depending on the operating conditions, select to turn on fan 4 to facilitate dehumidification and heat dissipation. The heating time is displayed using timer 18. After the running light 22 illuminates, press the switch (k1) button on timer 18. The running light 22 will extinguish, and the stop light 23 will illuminate. Then, disconnect the switch (k1) button on timer 18 to obtain the heating duration.

[0065] During the heating process, when the low, medium, and high three gears need to stop heating, press the stop switch 25 (SB1) button to stop heating. During the heating process, the current situation of heating can be observed through the test ammeter 20.

[0066] According to the different insulation level temperatures of the motor to be heated, the temperature controller 19 sets the pre-warning temperature value, the power-off temperature value, and the temperature lower limit starting heating temperature value. These set values ensure that the heating process is within a safe range, while avoiding the risk of damaging the motor insulation layer due to excessive temperature. The motor insulation level temperature is as follows: Class A: the maximum working temperature is 80℃ (or 105℃, there are differences according to different standards, but 80℃ is more common).

[0067] Class E: the maximum working temperature is 105℃.

[0068] Class B: the maximum working temperature is 130℃.

[0069] Class F: the maximum working temperature is 155℃.

[0070] Class H: the maximum working temperature is 180℃.

[0071] Class C and above: the maximum working temperature is above 180℃, such as Class D and Class S can reach above 220℃, but Class C is a more common expression, indicating a class above 180℃.

[0072] Pre-warning temperature value: when the heating temperature reaches the pre-set pre-warning value, the system will issue a warning signal, reminding the user to pay attention and take appropriate measures.

[0073] Power-off temperature value: when the heating temperature exceeds the set power-off temperature value, the system will automatically cut off the power supply to ensure the safety of the equipment.

[0074] Temperature lower limit starting heating temperature value: when the heating temperature drops to the set lower limit value, the system will automatically start the heating function to continue the drying process.

[0075] Three-grade temperature heating conversion:

[0076] According to the different moisture drying degrees of the motor, the heating level conversion switch 11 can be used to upgrade or downgrade the heating process. This design not only improves the drying efficiency, but also avoids the risk of damaging the motor due to excessive heating.

[0077] High gear: suitable for the initial stage or motors with heavy moisture, quickly increases the heating temperature, and accelerates the drying process.

[0078] Medium gear: suitable for the middle stage of drying, maintains appropriate heating temperature to ensure drying effect.

[0079] Low gear: suitable for the end of drying or the completion of the stage, reduce the heating temperature, to avoid over drying.

Claims

1. A stator dehumidification, drying, and insulation-enhancing instrument for electric motors, characterized in that... Includes a temperature control device (1), a set of tube racks (2), an electric heating element (3), and a fan (4). The temperature control device (1) is electrically connected to the electric heating tube (3) and the fan (4). The temperature control device (1) is used to control the heating temperature of the electric heating tube (3) and the speed of the fan (4). A set of tube racks (2) is placed inside the motor stator. The electric heating tube (3) is placed on a set of tube racks (2). The electric heating tube (3) is located at the center of the motor stator. The fan (4) is placed on one side of the motor stator and blows air towards the inner cavity of the motor stator.

2. The stator dehumidification, drying, and insulation-enhancing instrument for electric motors according to claim 1, characterized in that, The tube rack (2) includes an inner ring (5) and a set of support feet (6). A set of adjusting sleeves (7) are evenly distributed in a ring on the outer wall of the inner ring (5). The adjusting sleeves (7) have through holes on their walls. The support feet (6) are provided with adjusting rods (8). A set of positioning holes are arranged in sequence on the adjusting rods (8). The adjusting rods (8) are inserted into the corresponding adjusting sleeves (7). The locking pin passes through the through hole and is inserted into the positioning hole to fix the adjusting rods (8). The electric heating tube (3) is placed in the inner ring (5) and supported by the inner ring (5).

3. The stator dehumidification, drying, and insulation-enhancing instrument for electric motors according to claim 2, characterized in that, The support foot (6) is a cylindrical magnetic support foot.

4. The stator dehumidification, drying, and insulation-enhancing instrument for electric motors according to claim 1, characterized in that, The temperature control device (1) includes a housing (9), a three-position AC contactor (10), a position selector switch (11), an A-phase inlet (12), a B-phase inlet (13), a C-phase inlet (14), and an N-phase connector (15). The three-position AC contactor (10) is installed at the bottom of the enclosure (9). The three-position AC contactor (10), the position change switch (11), the A phase connection port (12), the B phase connection port (13), the C phase connection port (14) and the N connection port (15) are respectively installed on the cover of the enclosure (9).

5. The stator dehumidification, drying, and insulation-enhancing instrument for electric motors according to claim 4, characterized in that, The enclosure (9) is equipped with an alarm sound (16), a three-phase air switch (17), a timer (18), a temperature controller (19), a test ammeter (20), a speed controller (21), a running light (22), a stop light (23), a start switch (24), a stop switch (25), and a grounding terminal (26).

6. The stator dehumidification, drying, and insulation-enhancing instrument for electric motors according to claim 5, characterized in that, The fan (4) is electrically connected to the C-phase inlet (14) and the N-phase inlet (15) via the speed controller (21).

7. The stator dehumidification, drying, and insulation-enhancing instrument for electric motors according to claim 6, characterized in that, Phase A connection (12), Phase B connection (13) and Phase C connection (14) are electrically connected to the three-phase air switch (17) respectively.

8. The stator dehumidification, drying, and insulation-enhancing instrument for electric motors according to claim 7, characterized in that, The three-speed AC contactor (10) consists of a low-speed AC contactor (27), a medium-speed AC contactor (28), and a high-speed AC contactor (29). The low-heat terminal of the electric heating element (3) is electrically connected to the A-phase inlet (12), B-phase inlet (13), and C-phase inlet (14) via the low-heat AC contactor (27). The medium-heat setting terminal of the electric heating element (3) is electrically connected to the A-phase inlet (12), B-phase inlet (13), and C-phase inlet (14) via the medium-heat setting AC contactor (28). The high-heat terminal of the electric heating tube (3) is electrically connected to the A phase inlet (12), B phase inlet (13) and C phase inlet (14) via a high-grade AC contactor (29).

9. A motor stator dehumidification, drying, and insulation-enhancing instrument according to claim 8, characterized in that, The gear shift switch (11), alarm sound (16), timer (18), temperature controller (19), running light (22) and stop light (23) are electrically connected to the C phase input (14) through a three-position AC contactor (10).

10. A motor stator dehumidification, drying, and insulation-enhancing instrument according to claim 9, characterized in that, The start switch (24) and stop switch (25) are respectively connected to the output line of the C phase input (14).

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