Small mutual inductor iron core structure device

Abstract

A small transformer iron core structure device relates to the technical field of small voltage transformers, and is characterized in that a first pin, a second pin, a third pin, a fourth pin, a fifth pin and a sixth pin are made of copper, a gold layer is plated on the outer side of the first pin, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin, an iron core is made of 30QG110, a framework is made of nylon 66, and a box body is made of PBT. The corrosion resistance and the conductivity can be improved, welding of the pins can be facilitated, the installation efficiency of the voltage transformer can be improved, the first pin serves as primary input, the second pin serves as primary input, the third pin serves as shielding lead-out, the fourth pin serves as secondary output, the fifth pin serves as an empty pin, and the sixth pin serves as secondary output. The electromagnetic compatibility of the voltage transformer can be improved to reach the fast transient level 4, the resin adhesive is arranged on the inner wall of the box body, the composition materials of the product are all flame-retardant materials, and the flame-retardant level of all organic materials reaches the V-1 level.

Description

Technical Field

[0001] This invention relates to the field of small voltage transformer technology, and more specifically, to a small transformer core structure device. Background Technology

[0002] Instrument transformers, also known as instrument transformers, are a general term for current transformers and voltage transformers. They can transform high voltage into low voltage and large current into small current, and are used in measurement or protection systems to facilitate the standardization and miniaturization of measuring instruments, protection equipment, and automatic control equipment. At the same time, instrument transformers can also be used to isolate high voltage systems to ensure the safety of personnel and equipment. Existing small current transformers, such as the one disclosed in CN209045342U, involve connecting the current transformer coil to the circuit during use. The current flows through the windings of the current transformer coil and is then transmitted through the contact block. Through the principle of electromagnetic induction, the magnitude of the current is converted proportionally based on the ratio between the number of turns in the windings. When the current transformer is working, if a short circuit is caused by a power system fault, the current transformer will be subjected to the thermal effect of the huge current caused by the short circuit current, resulting in severe heating of the current transformer coil and even burning out the coil. At this time, the heat transfer plate will transfer the temperature to the fuse through the heat transfer rod. The fuse will melt due to the heat, and the tension spring will also be freed from the restraint of the fuse, thereby pulling the traction ring inward. The traction ring will pull the latch on the carbon dioxide cylinder and release carbon dioxide to extinguish the fire in time and prevent the current transformer from being burned out. However, existing small current transformers can only prevent further damage after a burnout has occurred, but they cannot improve heat dissipation efficiency when the transformer temperature rises rapidly. Therefore, they cannot prevent damage to the transformer when the temperature changes abruptly. In addition, they also have problems such as low impact resistance, poor insulation, low flame retardancy, and poor electromagnetic compatibility performance, so further improvements to small current transformers are needed. Summary of the Invention

[0003] The present invention aims to solve the technical problem that current transformers in the prior art cannot correspondingly improve heat dissipation efficiency when the temperature rises rapidly.

[0004] The objectives and effects of this invention are achieved by the following specific technical means: A small current transformer core structure device includes a housing, a core, a frame, and a coil. The bottom of the housing is fixedly equipped with a first pin, a second pin, a third pin, a fourth pin, a fifth pin, and a sixth pin.

[0005] Preferably, the box dimensions are 37mm long * 37mm wide * 34.5mm high, with an external dimensional deviation of no more than 1.0mm and a pin relative position deviation of no more than 0.5mm. The primary and secondary inputs and outputs of the current transformer are both Φ1.0mm pins, with a single shielding layer.

[0006] Preferably, the first, second, third, fourth, fifth, and sixth pins are made of copper and are plated with a gold layer on the outside.

[0007] Preferably, the core material is 30QG110, the skeleton material is reinforced with nylon 66, and the box material is PBT.

[0008] Preferably, a coil is wound around the outside of the skeleton, the coil is made of polyurethane enameled wire, the outside of the coil is wrapped with a polyethylene terephthalate film, and the inner wall of the box is provided with resin adhesive.

[0009] The device includes a top plate movably mounted on the upper part of the box, an air inlet cylinder fixedly connected to the lower side of the middle of the top plate, an arc-shaped filter layer installed along the inner wall of the air inlet cylinder, the bottom edge of the air inlet cylinder extending outwards, a spring sleeved on the outer side of the air inlet cylinder, a dust discharge groove opened inside the top plate corresponding to the outer side of the air inlet cylinder, a push block installed on the lower end of the top plate corresponding to the side of the dust discharge groove, a scraper movably mounted on the upper part of the box corresponding to the lower end of the push block, the scraper having bent sides, a turntable movably mounted inside the upper part of the box, a sleeve provided on the upper end of the turntable, a fixing rod fixedly connected to the lower side of the top plate corresponding to the middle of the air inlet cylinder, a drive rail opened on the outer side of the lower end of the fixing rod, a slider for entering the drive rail provided on the upper inner side of the sleeve, an outer expansion plate movably mounted on the outer side of the box, a push rod hinged to the outer side of the turntable, and an inner wall filter screen provided on the inner wall of the box corresponding to the outer expansion plate.

[0010] Preferably, multiple filter layers are continuously and equidistantly arranged inside the air intake cylinder, the lower end of the air intake cylinder extends into the box body, and the upper end of the box body has a circular opening that fits against the outer side of the air intake cylinder.

[0011] Preferably, the ash discharge trough corresponds to the filter layer on the air intake cylinder, and the ash discharge trough is arranged in an arc shape. Preferably, the pusher is a hollow rubber block, with the lower side of the pusher extending into the interior of the top plate and the remaining part disposed inside the top plate, and the pusher is filled with a small amount of liquid mercury.

[0012] Preferably, the upper end of the scraper enters the ash discharge trough, the box body has a cavity for the scraper to move downward, and a spring is provided on the lower side of the box body corresponding to the scraper.

[0013] Preferably, the lower end of the fixing rod enters the sleeve, the fixing rod is cylindrical, and the inner side of the sleeve is in contact with the outer side of the fixing rod.

[0014] Preferably, one side of the outer display plate is hinged to the outside of the box body, and multiple push rods are installed at equal intervals on the outside of the turntable, with the end of the push rod away from the turntable being hinged to the outer display plate. Beneficial effects

[0015] A small current transformer core structure device has the following beneficial effects: 1. The first, second, third, fourth, fifth, and sixth pins are made of copper with a gold plating layer on the outside. This improves corrosion resistance and conductivity while facilitating pin soldering and increasing the installation efficiency of the voltage transformer. The first and second pins are primary inputs, the third pin is the shielded lead, the fourth pin is the secondary output, the fifth pin is an empty pin, and the sixth pin is the secondary output. This improves the electromagnetic compatibility performance of the voltage transformer, achieving a fast transient level of 4. The inner wall of the housing is lined with resin adhesive, ensuring that all components of the product are flame-retardant materials, with all organic materials achieving a flame-retardant rating of V-1.

[0016] 2. A rectangular top plate is movably installed on the upper part of the box. An air inlet cylinder is fixedly connected to the lower center of the top plate. An arc-shaped filter layer is installed along the inner wall of the air inlet cylinder. Multiple filter layers are continuously and equidistantly arranged inside the air inlet cylinder. The lower end of the air inlet cylinder extends into the box. A circular opening is provided at the upper end of the box to fit against the outer side of the air inlet cylinder. The bottom edge of the air inlet cylinder extends outwards. A spring is fitted onto the outer side of the air inlet cylinder. A dust discharge groove is provided inside the top plate corresponding to the outer side of the air inlet cylinder. A dust discharge groove is installed on one side of the lower end of the top plate corresponding to the dust discharge groove. There is a pusher block, which is a hollow rubber block. The lower side of the pusher block protrudes into the top plate, and the rest is set inside the top plate. The pusher block is filled with a small amount of liquid mercury. When the temperature inside the box rises rapidly, the liquid mercury in the pusher block absorbs heat and expands rapidly, causing the lower end of the pusher block to contact the box and push the top plate upward. This creates a large gap between the top plate and the upper part of the box, and moves the air inlet to the outside of the box. This allows the airflow that normally dissipates heat from the outside to enter the box through the gap between the air inlet and the box, thus achieving the effect of rapidly improving heat dissipation efficiency.

[0017] 3. The ash discharge trough corresponds to the filter layer on the air intake cylinder. The ash discharge trough is arc-shaped. A scraper is movably installed on the upper end of the box corresponding to the lower end of the push block. Both sides of the scraper are bent. The upper end of the scraper enters the ash discharge trough. The box has a cavity for the scraper to move downward. A spring is set on the lower side of the box corresponding to the scraper. This allows the scraper to move downward before the push block lifts the top plate. This avoids the push block from becoming overly sensitive to temperature. When the air intake cylinder moves downward to reset after emergency cooling, the scraper can scrape the dust blocked on the filter layer and then move downward into the ash discharge trough. This achieves the effect of automatically cleaning the accumulated dust and ensuring the air intake efficiency of the subsequent air intake cylinder.

[0018] 4. A turntable is movably installed at the upper part of the box body. A sleeve is provided at the upper end of the turntable. A fixing rod is fixedly connected to the middle of the air inlet on the lower side of the top plate. The lower end of the fixing rod enters the sleeve. The fixing rod is cylindrical. The inner side of the sleeve fits against the outer side of the fixing rod. A drive rail is provided on the outer side of the lower end of the fixing rod. The drive rail extends downward at an angle along the outer side of the fixing rod. A slider is provided at the upper end of the inner side of the sleeve to enter the drive rail. An outer expansion plate is movably installed on the outer side of the box body. The outer side of the outer expansion plate has equidistant rectangular grooves. One side of the outer expansion plate is hinged to the outer side of the box body. The turntable is hinged to a push rod, which is installed at equal intervals on the outside of the turntable. The end of the push rod away from the turntable is hinged to the outer expansion plate. An inner wall filter is set on the side of the inner wall of the box corresponding to the outer expansion plate. When the fixed rod moves upward with the top plate, the slider in the sleeve can move along the drive rail on the fixed rod, thereby causing the sleeve to drive the turntable to rotate. This, in turn, drives the push rod to rotate and open one side of the outer expansion plate outward, allowing the gas entering the box to be discharged from all four directions, thus ensuring the internal heat dissipation efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a small current transformer core structure device according to the present invention.

[0020] Figure 2 This is an internal perspective view of the box body of the present invention.

[0021] Figure 3 This is a cross-sectional view of the inside of the box body of the present invention.

[0022] Figure 4 For the present invention Figure 3 Enlarged diagram of point A in the middle.

[0023] Figure 5 This is a top view of the turntable of the present invention.

[0024] Figure 6 This is a top perspective view of the air intake cylinder of the present invention.

[0025] Figure 7 This is a bottom view of the box body of the present invention.

[0026] Figure 8 This is a schematic diagram of the pin circuit of the present invention.

[0027] Figure 1-8 In the middle: 1-box body, 2-inner wall filter screen, 3-top plate, 4-first pin, 5-second pin, 6-third pin, 7-fourth pin, 8-fifth pin, 9-sixth pin, 10-heat absorption plate, 11-iron core, 12-frame, 13-coil, 14-air inlet cylinder, 15-turntable, 16-sleeve, 17-push rod, 18-push block, 19-ash discharge trough, 20-scraper, 21-fixed rod, 22-drive rail. Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Reference Figure 1-8 An exploded view and a planar view of a small current transformer core structure device. A small current transformer core structure device includes a housing 1, a core 11, a frame 12, and a coil 13. The bottom end of the housing 1 is fixedly installed with a first pin 4, a second pin 5, a third pin 6, a fourth pin 7, a fifth pin 8, and a sixth pin 9. In practical implementation, pins 4, 5, 6, 7, 8, and 9 are made of copper and plated with a 0.05mm gold layer. This improves corrosion resistance and conductivity while facilitating pin soldering and increasing the installation efficiency of the voltage transformer. Pins 4 and 5 are designated as primary input, pin 6 as shielded lead, pin 7 as secondary output, pin 8 as unused, and pin 9 as secondary output. This configuration enhances the electromagnetic compatibility (EMC) performance of the voltage transformer, achieving four levels of fast transient response, four levels of surge response (common mode), four levels of surge response (differential mode), four levels of oscillation response, and four levels of ringing response.

[0030] YH has anti-electromagnetic interference characteristics. Fast transients, common-mode surges, differential-mode surges, oscillation waves, and ringing waves have no effect on YH transmission.

[0031] In specific implementation, the core 11 is made of 30QG110, the frame 12 is made of Nylon 66, and the housing 1 is made of PBT. This can improve the overall strength of the voltage transformer and achieve the effects of vibration response level I, vibration durability level I, impact response level I, impact durability level I, and collision level I.

[0032] In specific implementation, a coil 13 is wound around the outside of the frame 12. The coil 13 is made of polyurethane enameled wire and wrapped with a polyethylene terephthalate film. The inner wall of the box 1 is provided with resin glue, thereby achieving the following effects: insulation resistance: >500M ohm (after completing the damp heat test according to DL-479 2009 for 1 hour, the insulation resistance is greater than 200Mohm), dielectric strength: 3500VAC leakage current <0.4mA, and impact withstand voltage: >5000V. The flame-retardant insulating compound of the resin glue on the inner wall of the box 1 ensures that all the components of the product are flame-retardant materials, and the flame retardant rating of all organic materials reaches V-1 level. In the specific implementation, a top plate 3 is movably installed on the upper end of the box body 1. The top plate 3 is rectangular. An air inlet cylinder 14 is fixedly connected to the lower side of the middle of the top plate 3. An arc-shaped filter layer is installed inside the air inlet cylinder 14 along the inner wall of the air inlet cylinder 14. Multiple filter layers are continuously and equidistantly arranged inside the air inlet cylinder 14. The lower end of the air inlet cylinder 14 penetrates into the box body 1. A circular opening is opened at the upper end of the box body 1 to fit with the outer side of the air inlet cylinder 14. Multiple longitudinal protrusions are provided on the outer side of the air inlet cylinder 14. A groove is provided on the inner side of the circular opening to fit with the outer side of the protrusion. The bottom edge of the air inlet cylinder 14 extends outward. A spring is sleeved on the outer side of the air inlet cylinder 14. In specific implementation, a ash discharge groove 19 is provided inside the top plate 3 corresponding to the outer side of the air inlet cylinder 14. The ash discharge groove 19 corresponds to the filter layer on the air inlet cylinder 14. The ash discharge groove 19 is arc-shaped. A push block 18 is installed on one side of the lower end of the top plate 3 corresponding to the ash discharge groove 19. The push block 18 is a hollow rubber block. The lower side of the push block 18 extends out of the interior of the top plate 3, and the rest is set inside the top plate 3. In the specific implementation, the push block 18 is filled with a small amount of liquid mercury. A scraper 20 is movably installed on the upper end of the box body 1 corresponding to the lower end of the push block 18. Both sides of the scraper 20 are bent. The upper end of the scraper 20 enters the ash discharge trough 19. The box body 1 has a cavity for the scraper 20 to move downward. A spring is provided on the lower side of the box body 1 corresponding to the scraper 20. In the specific implementation, a turntable 15 is movably installed at the upper end of the box body 1. A sleeve 16 is provided at the upper end of the turntable 15. A fixing rod 21 is fixedly connected to the middle end of the air inlet cylinder 14 on the lower side of the top plate 3. The lower end of the fixing rod 21 enters the inside of the sleeve 16. The fixing rod 21 is cylindrical. The inner side of the sleeve 16 fits against the outer side of the fixing rod 21. In specific implementation, a drive rail 22 is provided on the outer side of the lower end of the fixed rod 21. The drive rail 22 extends downward at an angle along the outer side of the fixed rod 21. A slider is provided on the upper side of the inner side of the sleeve 16 to enter the interior of the drive rail 22. In the specific implementation, an outer expansion plate 10 is movably installed on the outside of the box body 1. An equidistant rectangular groove is opened on the outside of the outer expansion plate 10. One side of the outer expansion plate 10 is hinged to the outside of the box body 1. A push rod 17 is hinged to the outside of the turntable 15. Multiple push rods 17 are installed equidistantly on the outside of the turntable 15. The end of the push rod 17 away from the turntable 15 is hinged to the outer expansion plate 10. An inner wall filter screen 2 is provided on the side of the inner wall of the box body 1 corresponding to the outer expansion plate 10.

[0033] A top plate 3 is movably mounted on the upper part of the box body 1. The top plate 3 is rectangular, and an air inlet cylinder 14 is fixedly connected to the lower side of the middle of the top plate 3. An arc-shaped filter layer is installed along the inner wall of the air inlet cylinder 14. Multiple filter layers are continuously and equidistantly arranged inside the air inlet cylinder 14. The lower end of the air inlet cylinder 14 extends into the box body 1. A circular opening is provided at the upper end of the box body 1 to fit against the outer side of the air inlet cylinder 14. The bottom edge of the air inlet cylinder 14 extends outward. A spring is fitted on the outer side of the air inlet cylinder 14. A dust discharge groove 19 is provided inside the top plate 3 corresponding to the outer side of the air inlet cylinder 14. A push block 18 is installed on the lower end of the top plate 3 corresponding to the side of the dust discharge groove 19. The push block 18 is a hollow rubber block. The lower side of the push block 18 extends out of the interior of the top plate 3, and the rest is located inside the top plate 3. The pusher block 18 is filled with a small amount of liquid mercury. When the internal temperature of the box 1 rises rapidly, the liquid mercury in the pusher block 18 absorbs heat and expands rapidly, causing the lower end of the pusher block 18 to contact the box 1 and push the top plate 3 upward. This creates a large gap between the top plate 3 and the upper part of the box 1, allowing the air inlet cylinder 14 to move to the outside of the box 1. This allows the airflow that normally dissipates heat from the outside to enter the box 1 through the gap in the air inlet cylinder 14, achieving a rapid improvement in heat dissipation efficiency. Then, the ash discharge trough 19 corresponds to the filter layer on the air inlet cylinder 14. The ash discharge trough 19 is arc-shaped. A scraper 20 is movably installed on the upper end of the box 1, corresponding to the lower end of the pusher block 18. Both sides of the scraper 20 are bent. The upper end of the scraper 20 enters the ash discharge trough 19, and the box 1 opens. A cavity is provided for the scraper 20 to move downwards. A spring is provided on the lower side of the box body 1 corresponding to the scraper 20, so that the scraper 20 needs to be moved downwards before the push block 18 pushes the top plate 3 upwards. This avoids the push block 18 from becoming overly sensitive to temperature. When the emergency cooling air intake cylinder 14 moves downwards and resets, the scraper 20 can scrape the dust blocked on the filter layer and then move downwards into the dust discharge trough 19, achieving the effect of automatically cleaning the accumulated dust and ensuring the air intake efficiency of the air intake cylinder 14. Then, a turntable 15 is movably installed at the upper end of the box body 1. A sleeve 16 is provided at the upper end of the turntable 15. A fixing rod 21 is fixedly connected to the middle of the air intake cylinder 14 on the lower side of the top plate 3. The lower end of the fixing rod 21 enters the sleeve 16. 21 is cylindrical in shape. The inner side of the sleeve 16 fits against the outer side of the fixed rod 21. A drive rail 22 is provided on the outer side of the lower end of the fixed rod 21. The drive rail 22 extends downward at an angle along the outer side of the fixed rod 21. A slider is provided on the upper inner side of the sleeve 16 to enter the drive rail 22. An outer expansion plate 10 is movably installed on the outer side of the box body 1. An equidistant rectangular groove is provided on the outer side of the outer expansion plate 10. One side of the outer expansion plate 10 is hinged to the outer side of the box body 1. A push rod 17 is hinged to the outer side of the turntable 15. Multiple push rods 17 are installed equidistantly on the outer side of the turntable 15. The end of the push rod 17 away from the turntable 15 is hinged to the outer expansion plate 10. An inner wall filter 2 is provided on the inner wall of the box body 1 on the side corresponding to the outer expansion plate 10. When the fixed rod 21 moves upward with the top plate 3,The slider inside the sleeve 16 can move along the drive rail 22 on the fixed rod 21, thereby causing the sleeve 16 to drive the turntable 15 to rotate. This, in turn, drives the push rod 17 to rotate and open one side of the outer expansion plate 10, allowing the gas entering the box 1 to be discharged from all four directions, thus ensuring efficient internal heat dissipation.

Claims

1. A small transformer core structure device, comprising a box body (1), a core (11), a skeleton (12), and a coil (13), characterized in that: The bottom of the box (1) is fixedly installed with a first pin (4), a second pin (5), a third pin (6), a fourth pin (7), a fifth pin (8), and a sixth pin (9). The top of the box (1) is movably installed with a top plate (3). An air inlet cylinder (14) is provided on the lower side of the top plate (3). A filter layer is provided inside the air inlet cylinder (14). A push block (18) is also provided at the lower end of the top plate (3). A turntable (15) is movably installed at the upper end of the box (1). A sleeve (16) is provided at the upper end of the turntable (15). A fixing rod (21) is fixedly connected to the middle end of the air inlet cylinder (14) on the lower side of the top plate (3). An outer expansion plate (10) is movably installed on the outer side of the box (1). A push rod (17) is hinged to the outer side of the turntable (15).

2. A compact transformer core structure arrangement according to claim 1, characterized in that The first pin (4), the second pin (5), the third pin (6), the fourth pin (7), the fifth pin (8), and the sixth pin (9) are made of copper and are plated with a layer of gold on the outside.

3. The small transformer core structure device according to claim 1, characterized in that: The core (11) is made of 30QG110, the skeleton (12) is made of reinforced nylon 66, and the box body (1) is made of PBT.

4. The miniature transformer core structure device according to claim 1, characterized in that: The outer side of the skeleton (12) is wound with a coil (13), the material of the coil (13) is polyurethane enameled wire, the outer side of the coil (13) is wrapped with a polyethylene terephthalate film, and the inner wall of the box (1) is provided with resin glue.

5. The miniature transformer core structure device according to claim 1, characterized in that: The bottom edge of the air intake cylinder (14) extends outward, and a spring is sleeved on the outside of the air intake cylinder (14). The filter layer is arc-shaped.

6. The miniature transformer core structure device according to claim 1, characterized in that: The top plate (3) has a ash discharge groove (19) on the outside of the air inlet cylinder (14). The upper end of the box body (1) is provided with a scraper (20). The upper end of the scraper (20) enters the ash discharge groove (19). The box body (1) has a cavity for the scraper (20) to move downward.

7. The miniature transformer core structure device according to claim 1, characterized in that: The push block (18) is a hollow rubber block. The lower side of the push block (18) extends through the interior of the top plate (3), and the rest of the push block (18) is located inside the top plate (3). The interior of the push block (18) is filled with liquid mercury.

8. The miniature transformer core structure device according to claim 1, characterized in that: The lower end of the fixing rod (21) enters the sleeve (16). The fixing rod (21) is cylindrical. One side of the outer plate (10) is hinged to the outside of the box (1). One end of the push rod (17) is hinged to the outer plate (10).

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