A magnetic-proof slot structure for current transformer and a manufacturing method thereof

Abstract

The present invention relates to the technical field of low-voltage electrical equipment, and in particular to a magnetic-proof slot structure of a current transformer and a manufacturing method thereof, comprising: a shell, an iron core, a winding and a magnetic-shielding ring, wherein a circular hole is respectively opened at both ends of the shell, a tube body is inserted into the circular hole, an iron core is mounted on the tube body, a winding is arranged on the iron core, an output end of the winding passes through the end surface outside the shell, and a magnetic-shielding ring is mounted on the iron core. By mounting the magnetic-shielding ring on the iron core, when measuring a cable to be measured, the magnetic conductivity of the iron core for the cable to be measured can be improved, and the magnetic field outside the device can be shielded, so that the current in the winding is stably output to the ammeter, thereby increasing the accuracy of the ammeter in measuring the cable to be measured.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical equipment, and in particular to a magnetic-proof slot structure of a current transformer and a manufacturing method thereof. Background Art

[0002] Current transformer is a commonly used measuring instrument in power system, which is used to reduce the high current in high voltage line to a safe range for measurement. It consists of primary winding (also called main line) and secondary winding (also called primary and secondary sides). There is a certain proportional relationship between primary and secondary, which is called transformation ratio. Current transformer is widely used in various fields such as electric energy metering devices, protection devices, automatic control systems and distribution automation. Its accuracy and stability are crucial to ensure the safe and stable operation of power system.

[0003] However, the prior art still has shortcomings. For example, a current transformer with patent number: CN201420755220.0 includes a main body, a primary winding and a circular iron core are arranged on the main body, the circular iron core is arranged in the middle of the primary winding, an adjustable winding is arranged outside the primary winding, the adjustable winding can be pulled out of the main body, a baffle is arranged on the main body, slide rails are arranged on both sides of the baffle, and the baffle can slide up and down on the slide rails. The device cannot effectively shield the magnetic field when working in it, which can easily lead to inaccurate measurement results. Summary of the invention

[0004] The present invention provides a current transformer anti-magnetic slot structure and a manufacturing method thereof, which are used to solve the problem raised in the background technology.

[0005] In order to achieve the above-mentioned invention objectives, the present invention provides the following technical solutions: a current transformer anti-magnetic slot structure, comprising: a shell, an iron core, a winding and a magnetic isolation ring, wherein a circular hole is opened at each end of the shell, a tube body is inserted into the circular hole, an iron core is mounted on the tube body, a winding is arranged on the iron core, the output end of the winding passes through the end face of the shell, and a magnetic isolation ring is mounted on the iron core.

[0006] Preferably, the magnetic isolation ring is made of soft magnetic alloy, silicon steel sheet or ferrite.

[0007] Preferably, the magnetic isolation ring is provided with a plurality of equal hexagonal holes, and the plurality of equal hexagonal holes form a honeycomb structure.

[0008] Preferably, the magnetic isolation ring is covered with an epoxy resin insulation layer.

[0009] Preferably, the housing is filled with a coolant, which is a mixture of paraffin-based synthetic oil, caustic soda solution, inorganic sulfur antioxidant and surfactant.

[0010] Preferably, the bottom end of the shell is connected to the shock absorbing mechanism, and the shock absorbing mechanism comprises: a tube body 2, two circular holes 2 are opened at the bottom end of the shell, the top of the tube body 2 is housed in the circular hole 2, the tube body 2 is arranged in the tube body 3, the tube body 3 is installed on the top surface of the shell 2, the bottom end of the tube body 3 is slidably sealed with a disc, the circular hole 3 on the disc slides and slides with the tube body 2, a retaining ring is provided at the bottom end of the tube body 2, the retaining ring is connected to the disc through a spring, a tube body 4 is provided on the bottom surface of the disc, the tube body 4 is coaxial with the tube body 2, the bottom surface of the disc is slidably sealed with the top of the tube body 5, the bottom wall of the tube body 5 is connected to the bottom surface of the disc through spring 2, and the tube body 5 is installed in the shell 2.

[0011] Preferably, the bottom end of the tube body five is connected to the end of the coil, the coil is installed in the shell two, the shell two is provided with heat dissipation holes, the heat dissipation holes are arranged toward the coil, the shell two is provided with a circulation mechanism, the output end of the circulation mechanism is connected to the coil, the top end of the coil passes through the top surface of the shell two and is connected to the end of the hose, and a circular hole four is provided on the side of the shell, and the other end of the hose is inserted into the circular hole four.

[0012] Preferably, the circulation mechanism includes: a bevel gear, a second bevel gear, a shaft body and pump blades, a motor is installed in the second housing, a bevel gear is installed at the output end of the motor, a second bevel gear is meshed and connected on both sides of the bevel gear, the second bevel gear is connected to the end of the shaft body, the shaft body is rotatably connected to the circular hole five on the pump casing, the pump casing is installed on the coil, a plurality of pump blades are installed on the shaft body, the pump blades are arranged in the pump casing, and the other end of the shaft body is rotatably connected to the inner wall of the pump casing.

[0013] Preferably, the second housing contains the second motor, the output end of the second motor is connected to a worm, the worm is meshingly connected with the worm wheel, the worm wheel is mounted on a transmission device, the transmission device is arranged in the second housing, the output end of the transmission device is provided with fan blades, and the output end of the fan blades is arranged toward the coil.

[0014] Preferably, a method for manufacturing a magnetic-proof slot structure of a current transformer is applicable to the magnetic-proof slot structure of a current transformer described in any one of the above items, and comprises the following steps:

[0015] A. Choose soft magnetic alloy, silicon steel sheet or ferrite to make magnetic isolation ring;

[0016] B. Use a machine tool to open a plurality of primary equal hexagonal holes on the magnetic isolation ring, and test the magnetic isolation effect of the primary equal hexagonal holes. After the test, use a machine tool to process the primary equal hexagonal holes to obtain secondary equal hexagonal holes;

[0017] C. Use an impact testing machine to test the structural strength of the magnetic isolation ring with secondary equihexagonal holes. After the test, use a machine tool to process the secondary equihexagonal holes to obtain equihexagonal holes, thereby obtaining a magnetic isolation ring with a honeycomb structure.

[0018] The beneficial effects of the present invention are as follows:

[0019] In the scheme of the present invention:

[0020] By installing a magnetic isolation ring on the iron core, when measuring the cable to be tested, the magnetic conductivity of the iron core for the cable to be tested can be improved, and the magnetic field outside the device can be shielded, so that the current in the winding can be stably output to the ammeter, thereby increasing the accuracy of the ammeter's measurement of the cable to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 It is a cross-sectional view of the main body of the present invention;

[0023] Figure 3 It is a schematic diagram of the isohexagonal hole structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the circulation mechanism of the present invention;

[0025] Figure 5 It is a schematic diagram of the pump blade structure of the present invention;

[0026] Figure 6 It is a side sectional view of the main body of the present invention;

[0027] Figure 7 It is a second cross-sectional view of the shaft body of the present invention;

[0028] Figure 8 It is a schematic diagram of the gear installation position of the present invention;

[0029] Fig. 9 It is six cross-sectional views of the tube body of the present invention;

[0030] Fig.10 It is a schematic diagram of the push rod structure of the present invention;

[0031] Fig.11 It is a schematic diagram of the installation position of the second air inlet pipe of the present invention.

[0032] Wherein: shell 1, iron core 2, winding 3, magnetic isolation ring 4, equihexagonal hole 5, epoxy resin insulation layer 6, shock absorbing mechanism 7, tube body 2 8, tube body 3 9, spring 10, tube body 4 11, tube body 5 12, spring 2 13, coil 14, heat dissipation hole 15, circulation mechanism 16, hose 17, bevel gear 18, bevel gear 2 19, shaft body 20, pump blade 21, worm 22, worm wheel 23, transmission device 24, fan blade 25, shaft body 2 26, plug 27, shaft body 3 28, gear 29, gear 2 30, gear 3 31, gear 4 32, gear 5 33, gear 6 34, shaft body 4 35, tube body 6 36, piston 37, push rod 38, solenoid 39, spring 3 40, adjustment ring 41, push rod 2 42, tube body 7 43, air inlet pipe 2 44. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0034] Example 1: Reference Figure 1-Figure 11 A magnetic-proof slot structure for a current transformer comprises: a shell 1, an iron core 2, a winding 3 and a magnetic-isolating ring 4. A circular hole is respectively opened at both ends of the shell 1, a tube body is inserted into the circular hole, an iron core 2 is mounted on the tube body, a winding 3 is arranged on the iron core 2, an output end of the winding 3 passes through the end surface of the shell 1, and a magnetic-isolating ring 4 is mounted on the iron core 2.

[0035] The principle of the above scheme is:

[0036] The iron core 2 is mounted on the tube body for fixing, the cable to be tested is passed through the tube body, the output end of the winding on the iron core 2 is passed through the outside of the shell 1 and connected to the ammeter, and the magnetic isolation ring 4 is mounted on the iron core 2 to shield the electromagnetic field outside the device.

[0037] The beneficial effects of the above scheme are:

[0038] By installing a magnetic isolation ring 4 on the iron core 2, when measuring the cable to be tested, the magnetic conductivity of the iron core 2 for the cable to be tested can be improved, and the magnetic field outside the device can be shielded, so that the current in the winding 3 can be stably output to the ammeter, thereby increasing the accuracy of the ammeter's measurement of the cable to be tested.

[0039] Example 2: Reference Figure 1-Figure 11 The material of the magnetic isolation ring 4 is soft magnetic alloy, silicon steel sheet or ferrite.

[0040] The principle of the above scheme is:

[0041] The magnetic isolation ring 4 is made of soft magnetic alloy, silicon steel sheet or ferrite.

[0042] The beneficial effects of the above scheme are:

[0043] The magnetic isolation ring 4 is made of soft magnetic alloy, silicon steel sheet or ferrite material. When there is magnetic field interference outside the device, the free electrons inside the magnetic isolation ring 4 are excited to move, thereby generating current. The further current generates a reverse magnetic field, and the reverse magnetic field and the magnetic field cancel each other out, thereby achieving the purpose of magnetic isolation for the iron core 2.

[0044] Example 3: Reference Figure 1-Figure 11 The magnetic isolation ring 4 is provided with a plurality of equal hexagonal holes 5, and the plurality of equal hexagonal holes 5 form a honeycomb structure.

[0045] The principle of the above scheme is:

[0046] A plurality of equal hexagonal holes 5 are formed on the magnetic isolation ring 4 , and the plurality of equal hexagonal holes 5 cooperate with each other to form a honeycomb structure.

[0047] The beneficial effects of the above scheme are:

[0048] The magnetic isolation ring 4 with a honeycomb structure increases its surface area in the external magnetic field, thereby generating a larger current and reverse magnetic field, further improving the magnetic isolation effect of the magnetic isolation ring 4 .

[0049] Example 4: Reference Figure 1-Figure 11 The magnetic isolation ring 4 is provided with an epoxy resin insulation layer 6.

[0050] The principle of the above scheme is:

[0051] The epoxy resin insulating layer 6 is mounted on the magnetic isolation ring 4 .

[0052] The beneficial effects of the above scheme are:

[0053] Providing the epoxy resin insulating layer 6 can enhance the mechanical strength and insulating performance of the magnetic isolation ring 4 .

[0054] Example 5: Reference Figure 1-Figure 11 The housing 1 is filled with a coolant, which is a mixture of paraffin-based synthetic oil, caustic soda solution, inorganic sulfur antioxidant and surfactant.

[0055] The principle of the above scheme is:

[0056] The coolant is a mixture of paraffin-based synthetic oil, caustic soda solution, inorganic sulfur antioxidant and surfactant. The mixed coolant is injected into the housing 1. When the device measures the cable to be tested, a magnetic field is generated in the iron core 2 and a current is generated in the winding 3. Therefore, the winding 3 will heat up, and the heat of the winding 3 will be transferred to the iron core 2.

[0057] The beneficial effects of the above scheme are:

[0058] By injecting coolant into the shell 1, the heat of the core 2 and the winding 3 can be absorbed to prevent the temperature inside the device from being too high, and the heat is dissipated through the shell 1; at the same time, the coolant can increase the insulation effect between the core 2 and the winding 3 and the shell 1.

[0059] Example 6: Reference Figure 1-Figure 11 The bottom end of the shell 1 is connected to the shock absorbing mechanism 7, and the shock absorbing mechanism 7 includes: a tube body 8, two circular holes 2 are opened at the bottom end of the shell 1, the top of the tube body 8 is installed in the circular hole 2, the tube body 8 is arranged in the tube body 3 9, the tube body 3 9 is installed on the top surface of the shell 2, the bottom end of the tube body 3 9 is slidably sealed with the disc, the circular hole 3 on the disc slides and slides with the tube body 2 8, a retaining ring is installed at the bottom end of the tube body 2 8, the retaining ring is connected to the disc through a spring 10, a tube body 4 11 is installed on the bottom surface of the disc, the tube body 4 11 is coaxial with the tube body 2 8, the bottom surface of the disc is slidably sealed with the top of the tube body 5 12, the bottom wall of the tube body 5 12 is connected to the bottom surface of the disc through a spring 2 13, and the tube body 5 12 is installed in the shell 2.

[0060] The principle of the above scheme is:

[0061] When the device is measuring the cable to be measured, due to the influence of the temperature difference between the inside and outside, the loss of the iron core 2 and the frequency change of the current to be measured, the iron core 2 and the winding 3 will vibrate, the tube body 2 8 vibrates up and down along the circular hole 3, the spring 10 limits the tube body 2 8 in the longitudinal direction, the tube body 4 11 vibrates circumferentially relative to the tube body 5 12, the tube body 4 11 drives the bottom surface of the disk and the top end of the tube body 5 12 to slide relative to each other, the top surface of the disk and the bottom end of the tube body 3 9 slide relative to each other, and the spring 2 13 limits the tube body 4 11 in the circumferential direction.

[0062] The beneficial effects of the above scheme are:

[0063] The spring 10 and the spring 2 13 are provided to absorb the vibration of the core 2 and the winding 3, thereby reducing the vibration generated by the device when measuring the current. At the same time, due to the reduction of vibration, the noise of the device during the test is reduced, the loss of parts in the device is reduced, and the service life of the device is increased;

[0064] The bottom surface of the disc slides relative to the top of the tube body 5 12, and the top surface of the disc slides relative to the bottom end of the tube body 3 9. The gap between the tube body 5 12 and the tube body 3 9 can guide the circumferential movement of the disc, further reducing the generation of vibration and noise.

[0065] Example 7: Reference Figure 1-Figure 11The bottom end of the tube body 5 12 is connected to the end of the coil 14, the coil 14 is installed in the shell 2, the shell 2 is provided with a heat dissipation hole 15, the heat dissipation hole 15 is arranged toward the coil 14, the shell 2 is provided with a circulation mechanism 16, the output end of the circulation mechanism 16 is connected to the coil 14, the top end of the coil 14 passes through the top surface of the shell 2 and is connected to the end of the hose 17, the side of the shell 1 is provided with a circular hole 4, and the other end of the hose 17 is inserted into the circular hole 4.

[0066] The principle of the above scheme is:

[0067] After the device starts working, the circulation mechanism 16 is started, and the output end of the circulation mechanism 16 circulates the coolant in the coil 14. The coolant enters the tube body 2 8 through the outer shell 1, enters the tube body 4 11 through the tube body 2 8, enters the tube body 5 12 through the tube body 4 11, enters the coil 14 through the tube body 5 12, and finally enters the outer shell 1 again through the hose 17, wherein the coolant in the coil 14 can be cooled through the heat dissipation holes 15; the hose 17 is specifically made of rubber, and the coil 14 is specifically made of copper with excellent thermal conductivity.

[0068] The beneficial effects of the above scheme are:

[0069] After the circulation mechanism 16 is started, its output end provides power for the circulation of the coolant in the coil 14. Since the volume of the coolant expands after being heated, in order to prevent the housing 1 from being damaged by the volume-expanded coolant, the coolant can be circulated and cooperated with the heat dissipation holes 15 to reduce pressure and cool it.

[0070] At the same time, when the temperature in the coolant rises, some components inside it will precipitate bubbles. Since the inner diameters of the tube body 2 8, the tube body 4 11 and the tube body 5 12 are set from small to large, after the coolant entering the tube body 5 12 from the shell 1 is changed by the change of the inner diameter of the pipeline, there is a large pressure gradient between the coolant at the bottom of the tube body 5 12 and the top of the tube body 2 8. Due to the existence of the pressure gradient, the flow rate of the coolant slows down instantly, and the pressure on most of the bubbles inside is reduced, which leads to rupture, thereby preventing the bubbles from impacting the inside of the coil 14 and extending the service life of the coil 14.

[0071] The coolant cooled by the heat dissipation hole 15 enters the housing 1 through the hose 17. Since the hose 17 and the coil 14 are made of different materials and have different internal roughness, the flow rate of the coolant passing through the hose 17 and the coil 14 is different. Therefore, there is a flow rate difference between the two. At the same time, since the inner diameters of the two are similar, the flow rate difference varies greatly. The remaining bubbles in the coolant can be completely broken and precipitated, which can further prevent the bubbles from impacting the housing 1 when the coolant is circulating, thereby further improving the service life of the housing 1.

[0072] During the circulation process, the coolant can cooperate with the spring 10, the spring 2 13 and the retaining ring to provide longitudinal damping for the tube 2 8, and also provide circumferential damping for the tube 4 11, further reducing the vibration of the device and improving the shock absorption effect;

[0073] The disc and the top end of the tube body 5 12 are slidably sealed, which reduces the difficulty of sealing the device.

[0074] Example 8: Reference Figure 1-Figure 11 The circulation mechanism 16 includes: a bevel gear 18, a bevel gear 19, a shaft 20 and a pump blade 21. The housing 2 is equipped with a motor, and the output end of the motor is equipped with a bevel gear 18. A bevel gear 19 is meshed and connected on both sides of the bevel gear 18. The bevel gear 19 is connected to the end of the shaft 20. The shaft 20 is rotatably connected to the circular hole 5 on the pump housing. The pump housing is installed on the coil 14. A plurality of pump blades 21 are installed on the shaft 20. The pump blades 21 are arranged in the pump housing, and the other end of the shaft 20 is rotatably connected to the inner wall of the pump housing.

[0075] The principle of the above scheme is:

[0076] When the coolant needs to be circulated, the motor output end is started to rotate, the motor output end drives the bevel gear 18 to rotate, the bevel gear 18 drives the two bevel gears 19 meshing with it to rotate, the bevel gear 19 drives the shaft 20 and the pump blades 21 to rotate, and the pump blades 21 circulate the coolant in the coil 14 in the pump casing.

[0077] The beneficial effects of the above scheme are:

[0078] The bevel gear 18 is meshed with two bevel gears 19, which are mounted on a shaft 20, and a pump blade 21 is mounted on the shaft 20, thereby improving the efficiency of the coolant circulation. The two coils 14 are arranged to accelerate the heat dissipation effect of the coolant.

[0079] Example 9: Reference Figure 1-Figure 11 The second housing contains a second motor, the output end of the second motor is connected to a worm 22, the worm 22 is meshed with a worm wheel 23, the worm wheel 23 is mounted on a transmission device 24, the transmission device 24 is arranged in the second housing, the output end of the transmission device 24 is provided with a fan blade 25, and the output end of the fan blade 25 is arranged toward the coil 14.

[0080] The principle of the above scheme is:

[0081] During the circulation of the coolant, the output end of the second starter motor rotates, the output end of the second motor drives the worm 22 to rotate, the worm 22 drives the worm wheel 23 meshing with it to rotate, the worm wheel 23 drives the transmission device 24 to rotate, and the fan blades 25 at the output end of the transmission device 24 blow air toward the coil 14 to cool the coil 14 and the coolant.

[0082] The beneficial effects of the above scheme are:

[0083] The fan blades 25 are provided to blow air to the coil 14 to accelerate the efficiency of heat dissipation of the coolant; during the heat dissipation process, the heat is transferred to the inside of the shell 2 through the heat dissipation holes 15, preventing heat accumulation inside the shell 2.

[0084] Example 10: Reference Figure 1-Figure 11 The transmission device 24 includes: a shaft body 26, an insert block 27, a shaft body 3 28, a gear 29, a gear 2 30, a gear 3 31, a gear 4 32, a gear 5 33, a gear 6 34 and a shaft body 4 35. The worm gear 23 is mounted on the shaft body 26. The shaft body 26 is rotatably mounted in the housing 2. The shaft body 4 35 is rotatably mounted on the air inlet pipe in the housing 2. An insert block 27 is mounted at each end of the shaft body 26. The insert block 27 is slidably matched with the slot. The slot is opened at the end of the shaft body 3 28. Gears 29, gear 2 30 and gear 3 are equidistantly mounted on the shaft body 3 28. 31, the number of teeth of gear 29, gear 2 30 and gear 3 31 increases successively, and gear 4 32, gear 5 33, gear 6 34 and fan blade 25 are arranged on shaft body 4 35 at intervals, and the number of teeth of gear 4 32, gear 5 33 and gear 6 34 decreases successively, gear 4 32 is meshed and connected with gear 29, the number of teeth and module of gear 5 33 and gear 2 30 are equal, the number of teeth and module of gear 6 34 and gear 3 31 are equal, gear 5 33 is arranged between gear 2 30 and gear 3 31, and gear 6 34 is arranged between the other end of shaft body 3 28 and fan blade 25.

[0085] The principle of the above scheme is:

[0086] The worm gear 23 drives the shaft body 26 and the plug block 27 to rotate. The plug block 27 is inserted into the slot. The plug block 27 drives the shaft body 3 28 to rotate. The shaft body 3 28 drives the gear 29, the gear 2 30 and the gear 3 31 to rotate. The gear 29 is meshed with the gear 4 32. The gear 4 32 drives the shaft body 4 35 and the fan blade 25 to rotate.

[0087] The beneficial effects of the above scheme are:

[0088] An insert block 27 is installed at each end of the shaft body 26, and the insert block 27 is plugged into the slot on the shaft body 3 28. When the worm gear 23 rotates, the shaft body 26, the insert block 27, the shaft body 3 28 and the fan blades 25 rotate synchronously. The rotation of the fan blades 25 cools the coil 14 and the coolant, thereby improving the cooling efficiency of the device.

[0089] Example 11: Reference Figure 1-Figure 11The shell 2 is equipped with a tube body 6 36, and the tube body 6 36 is connected to the bottom end of the hose 2. The top of the hose 2 passes through the outside of the shell 2 and is connected to the shell 1. The tube body 6 36 is slidably connected and sealed with a piston 37. The top surface of the piston 37 contacts and cooperates with the bottom end of the positioning block. The positioning block is installed in the tube body 6 36. The bottom end of the piston 37 is connected to a push rod 38. The side wall of the push rod 38 is longitudinally equipped with a plurality of sliders. The sliders are slidably connected with the longitudinal slide groove. The longitudinal slide groove is provided on the inner wall of the solenoid 39. The inner wall of the solenoid 39 is slidably connected with the side wall of the push rod 38. The top of the solenoid 39 is connected to the bottom surface of the piston 37 through a spring 3 40. The solenoid 39 is threadedly connected with the screw hole. The screw hole is provided at the bottom end of the tube body 6 36. The bottom end of the solenoid 39 outside the tube body 6 36 is equipped with an adjusting ring 41.

[0090] The principle of the above scheme is:

[0091] Part of the coolant is injected into the tube body 6 36 through the hose 2. When the temperature of the coolant in the housing 1 rises, the temperature of the coolant in the tube body 6 36 rises synchronously, and the volume of the coolant expands, so that the piston 37 moves downward and breaks away from the contact with the positioning block, the spring 3 40 is compressed, and the push rod 38 moves downward; when the temperature of the coolant drops, the volume decreases, and the spring 3 40 drives the piston 37 to reset, and the piston 37 contacts the positioning block again;

[0092] When the temperature of the external environment becomes higher, or the coolant expands greatly due to the temperature, the adjusting ring 41 is rotated clockwise, the adjusting ring 41 drives the solenoid 39 to rotate, the height of the solenoid 39 in the tube body 6 36 is reduced, the piston 37 cooperates with the positioning block, and the spring 3 40 is stretched;

[0093] When the external ambient temperature becomes lower, or the volume expansion of the coolant due to the temperature becomes smaller, the adjusting ring 41 is rotated counterclockwise, the adjusting ring 41 drives the screw tube 39 to rotate, the height of the screw tube 39 in the tube body 6 36 increases, the piston 37 cooperates with the positioning block, and the spring 3 40 is compressed.

[0094] The beneficial effects of the above scheme are:

[0095] The top of the tube body 6 36 is connected to the shell 2, and the high-temperature coolant in it can be dissipated through the tube body 6 36 and the shell 2, further assisting the coolant in the shell 1 to dissipate heat;

[0096] By adjusting the height of spring three 40 in tube body six 36, the elastic force of spring three 40 can be appropriately adjusted according to the temperature of the external environment and the degree of volume expansion of the coolant due to the temperature, and the elastic force applied to piston 37 can be adjusted, and the sensitivity of piston 37 can be further adjusted to prevent the sensitivity of piston 37 from being too low so that it cannot move in time, resulting in excessive pressure in tube body six 36.

[0097] Example 12: Reference Figure 1-Figure 11 The push rod 38 is placed under the adjusting ring 41, and the top of a push rod 2 42 is hinged on both sides of the bottom end. The bottom end of the push rod 2 42 is hinged to the top of the tube body 7 43, and the tube body 7 43 is rotatably connected to the shaft body 3 28.

[0098] The principle of the above scheme is:

[0099] When the pressure in tube body six 36 increases, after the push rod 38 moves downward, the top end of push rod two 42 moves downward, and the bottom end of push rod two 42 moves away from push rod 38, and push rod 38 drives tube body seven 43 to move synchronously, and the adjusting ring 41 drives shaft body three 28, gear 29, gear two 30 and gear three 31 to move, and gear two 30 is meshed and connected with gear five 33; when the pressure in tube body six 36 further increases, push rod 38 continues to move downward, and gear three 31 is meshed and connected with gear six 34.

[0100] The beneficial effects of the above scheme are:

[0101] The tube body 7 43 is rotatably connected to the shaft body 3 28 so that the shaft body 3 28 can maintain rotation while axially moving.

[0102] The movement of push rod 38 drives the movement of push rod 2 42, tube body 7 43 and shaft body 3 28, which can change the meshing order between the gears, realize the change of the rotation speed of shaft body 4 35, and further change the rotation speed of fan blade 25. When the temperature of coolant is low, the rotation speed of fan blade 25 is slow. When the temperature of coolant rises, the rotation speed of fan blade 25 becomes faster. When the temperature of coolant is too high, the rotation speed of fan blade 25 is increased to the fastest, so as to prevent damage to the device caused by excessive expansion of coolant, and at the same time enhance the ability of the device to adjust and control autonomously.

[0103] Example 13: Reference Figure 1-Figure 11 One end of the air inlet pipe is inserted into the notch of the second shell, the end of the second air inlet pipe 44 is installed on the top of the air inlet pipe, and the other end of the second air inlet pipe 44 is arranged toward the third shaft 28 and the fourth shaft 35.

[0104] The principle of the above scheme is:

[0105] After the fan blades 25 rotate, the pressure in the air inlet pipe decreases, and the air flow enters the second air inlet pipe 44, blows toward the third shaft 28 and the fourth shaft 35 through the second air inlet pipe 44, and is discharged from the housing 2 through the heat dissipation holes 15 under the guidance of the fan blades 25.

[0106] The beneficial effects of the above scheme are:

[0107] The second air inlet pipe 44 can dissipate heat for the shaft body 3 28 and the shaft body 4 35, and the gears mounted thereon;

[0108] At the same time, the second air inlet pipe 44 can clean the heat dissipation holes 15 to prevent dust accumulation.

[0109] Example 14: Reference Figure 1-Figure 11 A method for manufacturing a magnetic-proof slot structure of a current transformer, applicable to any one of the magnetic-proof slot structures of a current transformer described above, comprises the following steps:

[0110] A. Select soft magnetic alloy or silicon steel sheet or ferrite to make the magnetic isolation ring 4;

[0111] B. Use a machine tool to open a plurality of primary equal hexagonal holes on the magnetic isolation ring 4, and test the magnetic isolation effect of the primary equal hexagonal holes. After the test, use a machine tool to process the primary equal hexagonal holes to obtain secondary equal hexagonal holes;

[0112] C. Use an impact testing machine to perform a structural strength test on the magnetic isolation ring 4 with secondary and primary equihexagonal holes. After the test, use a machine tool to process the secondary and primary equihexagonal holes to obtain equihexagonal holes 5, thereby obtaining a magnetic isolation ring 4 with a honeycomb structure.

[0113] The principles and beneficial effects of the above scheme are:

[0114] The magnetic isolation ring 4 is made of soft magnetic alloy, silicon steel sheet or ferrite material as the magnetic isolation material. The selection of soft magnetic alloy, silicon steel sheet or ferrite material can improve the shielding effect of the magnetic isolation ring 4 against the external magnetic field. After the magnetic isolation ring 4 is made, a plurality of primary equihexagonal holes are opened on its surface by a machine tool, and the magnetic isolation effect of the magnetic isolation ring 4 is tested. After the test, the best secondary equihexagonal hole size is obtained, and the machine tool is used again to expand the primary equihexagonal hole to obtain a secondary equihexagonal hole, so as to avoid reducing the magnetic isolation effect of the magnetic isolation ring 4 after processing the equihexagonal hole 5 once. Subsequently, an impact testing machine is used to test the strength of the magnetic isolation ring 4. The specific model of the impact testing machine is: CMT-20 impact testing machine. After the test, the best equihexagonal hole 5 size is obtained. Under the premise of not destroying the strength of the magnetic isolation ring 4, the secondary equihexagonal hole is processed into an equihexagonal hole 5 by a machine tool, which can reduce the weight of the magnetic isolation ring 4 while ensuring its strength.

[0115] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A current transformer anti-magnetic slot structure, characterized in that: include: A shell (1), an iron core (2), a winding (3) and a magnetic isolation ring (4), wherein the shell (1) has a circular hole at each end, a tube body is inserted into the circular hole, an iron core (2) is mounted on the tube body, a winding (3) is arranged on the iron core (2), an output end of the winding (3) extends to the outside of the end surface of the shell (1), and a magnetic isolation ring (4) is mounted on the iron core (2); The housing (1) is filled with a coolant, which is a mixture of paraffin-based synthetic oil, caustic soda solution, inorganic sulfur antioxidant and surfactant; The bottom end of the shell (1) is connected to the shock absorbing mechanism (7), and the shock absorbing mechanism (7) comprises: a second tube body (8), the bottom end of the shell (1) is provided with two second circular holes, the top end of the second tube body (8) is arranged in the second circular hole, the second tube body (8) is arranged in the third tube body (9), the third tube body (9) is installed on the top surface of the shell (2), the bottom end of the third tube body (9) is slidably sealed with a disc, the third circular hole on the disc is slidably matched with the second tube body (8), the bottom end of the second tube body (8) is provided with a retaining ring, the retaining ring is connected to the disc through a spring (10), the bottom surface of the disc is provided with a fourth tube body (11), the fourth tube body (11) is coaxial with the second tube body (8), the bottom surface of the disc is slidably sealed with the top end of the fifth tube body (12), the bottom wall of the fifth tube body (12) is connected to the bottom surface of the disc through a second spring (13), and the fifth tube body (12) is installed in the shell (2); The bottom end of the tube body (5) (12) is connected to the end of the coil (14), the coil (14) is installed in the shell (2), the shell (2) is provided with a heat dissipation hole (15), the heat dissipation hole (15) is arranged toward the coil (14), the shell (2) is provided with a circulation mechanism (16), the output end of the circulation mechanism (16) is connected to the coil (14), the top end of the coil (14) passes through the top surface of the shell (2) and is connected to the end of the hose (17), the side of the shell (1) is provided with a circular hole (4), the other end of the hose (17) is inserted into the circular hole (4); The circulation mechanism (16) comprises: a bevel gear (18), a second bevel gear (19), a shaft (20) and pump blades (21); a motor is installed in the second housing; a bevel gear (18) is installed at the output end of the motor; two bevel gears (19) are meshedly connected on both sides of the bevel gear (18); the second bevel gear (19) is connected to the end of the shaft (20); the shaft (20) is rotatably connected to the fifth circular hole on the pump housing; the pump housing is installed on the coil (14); a plurality of pump blades (21) are installed on the shaft (20); the pump blades (21) are arranged in the pump housing; the other end of the shaft (20) is rotatably connected to the inner wall of the pump housing; The second housing contains a second motor, the output end of the second motor is connected to a worm (22), the worm (22) is meshedly connected with a worm wheel (23), the worm wheel (23) is mounted on a transmission device (24), the transmission device (24) is arranged in the second housing, the output end of the transmission device (24) is provided with a fan blade (25), and the output end of the fan blade (25) is arranged toward the coil (14).

2. The anti-magnetic slot structure of a current transformer according to claim 1, characterized in that: The material of the magnetic isolation ring (4) is a soft magnetic alloy, a silicon steel sheet or a ferrite.

3. The anti-magnetic slot structure of a current transformer according to claim 2, characterized in that: The magnetic isolation ring (4) is provided with a plurality of equal hexagonal holes (5), and the plurality of equal hexagonal holes (5) form a honeycomb structure.

4. The anti-magnetic slot structure of a current transformer according to claim 3, characterized in that: The magnetic isolation ring (4) is provided with an epoxy resin insulation layer (6).

5. A method for manufacturing a magnetic-proof slot structure of a current transformer, applicable to a magnetic-proof slot structure of a current transformer as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: A. Selecting soft magnetic alloy, silicon steel sheet or ferrite to make the magnetic isolation ring (4); B. using a machine tool to open a plurality of primary equal hexagonal holes on the magnetic isolation ring (4), and testing the magnetic isolation effect of the primary equal hexagonal holes. After the test, using a machine tool to process the primary equal hexagonal holes to obtain secondary equal hexagonal holes; C. Using an impact testing machine to perform a structural strength test on the magnetic isolation ring (4) with the secondary equihexagonal holes, after the test, using a machine tool to process the secondary equihexagonal holes to obtain equihexagonal holes (5), thereby obtaining a magnetic isolation ring (4) with a honeycomb structure.

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