A wide range current transformer calibration device

Abstract

The present invention discloses a wide-range current transformer calibration device, comprising a mounting box and a current transformer fixture, wherein the outer side of the mounting box is fixedly sleeved with an outer protective shell, the bottom of the mounting box is fixedly mounted with four shock-absorbing legs, the interior of the mounting box is provided with a mezzanine space, the inner side of the mezzanine space is fixedly mounted with a plurality of bottom-opening partitions, the inner side of the mezzanine space is fixedly mounted with a plurality of top-opening partitions, and the bottom end of the bottom-opening partition is provided with two bottom connecting holes; a bolt is inserted through the provided bolt hole and screwed into the interior of the mounting nut seat, thereby placing the current transformer fixture into the interior of the recessed placement box and fixing it, thereby facilitating port connection, facilitating disassembly and replacement of the fixture, facilitating replacement and installation of fixtures of different models so as to calibrate a variety of current transformers, and increasing the convenience of calibration.

Description

Technical Field

[0001] The present invention relates to the technical field of current transformer calibration equipment, in particular to a wide-range current transformer calibration device. Background Art

[0002] The working principle of a current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series with the current to be measured. Therefore, it always carries the entire current of the circuit. The secondary winding has more turns and is connected in series with the measuring instrument and protection circuit. When the current transformer is operating, its secondary circuit is always closed, so the impedance of the series coil between the measuring instrument and the protection circuit is very low, and the current transformer's operating state is close to a short circuit. A current transformer converts a high primary current into a low secondary current for use; the secondary side cannot be open-circuited. A current transformer calibration device typically consists of a power supply module, a signal conditioning module, a data acquisition module, a processing and control module, a robotic arm, and a test fixture.

[0003] To ensure safe operation and assess the precise working status of current transformers, a calibration device is required. However, the electronic components and transformers in these devices are temperature-sensitive. Generally, their optimal operating temperature range is between 20°C and 25°C. The most precise electronic components achieve a relatively stable performance at this temperature. However, over extended periods of operation or under conditions of significant ambient temperature fluctuations, the device's performance may drift, leading to unstable measurement results. For example, rising temperatures can increase the transformer's core loss, affecting its ratio accuracy and, consequently, the reliability of the calibration results. Existing calibration devices often use fan-operated, open-type cooling systems. These devices are susceptible to adverse environmental changes, such as dust absorption, which reduces heat dissipation efficiency, and humid environments, which can damage electrical components. These adverse environmental changes can affect the calibration process. This can cause inconvenience and reduce the service life of portable calibration devices used in specialized operating scenarios. Therefore, a wide-range current transformer calibration device is proposed. Summary of the Invention

[0004] The object of the present invention is to provide a wide-range current transformer calibration device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a wide-range current transformer calibration device, comprising a mounting box and a current transformer fixture, wherein the outer side of the mounting box is fixedly sleeved with an outer protective shell, the bottom of the mounting box is fixedly mounted with four shock-absorbing legs, the interior of the mounting box is provided with a mezzanine space, the inner side of the mezzanine space is fixedly mounted with a plurality of bottom opening partitions, the inner side of the mezzanine space is fixedly mounted with a plurality of top opening partitions, the bottom end of the bottom opening partition is provided with two bottom communicating holes, the top two ends of the top opening partition are fixedly mounted with a plurality of bottom communicating holes, and the top two ends of the top opening partition are fixedly mounted with a plurality of bottom communicating holes. Top connecting holes are opened on both sides, four mounting seats are fixedly installed on the bottom of the inner cavity of the installation box, hollow heat sink plate 2 is fixedly installed on the top of the four mounting seats, a heat dissipation fan is movably installed on the top of the hollow heat sink plate 2, a number of heat sink plates 1 are fixedly installed on the bottom of the hollow heat sink plate 2, a power supply component is fixedly installed on the bottom of the inner cavity of the installation box, a number of flexible shock-absorbing brackets are fixedly installed on the top of the flexible shock-absorbing brackets are fixedly installed with a circuit board assembly, and a partition panel is fixedly installed on the inner wall of the installation box.

[0006] The current transformer clamp includes a base plate, an upper clamping ring and a lower clamping ring. The lower clamping ring is fixedly installed on the top of the base plate. The inner sides of the two ends of the upper clamping ring are movably sleeved with movable columns. The outer side of the bottom end of the movable column is fixedly sleeved with an articulated movable sleeve. The outer side of the articulated movable sleeve is hinged with an articulated seat.

[0007] Preferably, a display screen is installed on the top of the partition panel, four electric telescopic rods are fixedly installed on the top of the partition panel, a top cover is fixedly installed on the top of the four electric telescopic rods, a sealing ring strip is fixedly installed on the bottom of the top cover, two concave placement boxes are fixedly sleeved inside the top cover, acrylic sealing cover plates are movably installed on the tops of the two concave placement boxes, four mounting screws are fixedly installed on the bottoms of the inner cavities of the two concave placement boxes, two detection plug-in interfaces 1 are fixedly installed on the bottoms of the inner cavities of the two concave placement boxes, a number of detection plug-in interfaces 2 are installed on the top of the partition panel, a transparent window is fixedly installed on the inside of the top cover, and a control panel is installed on the front of the outer protective shell.

[0008] Preferably, the outer protective shell and the mounting box are provided with a wrapped aluminum foil heat-insulating shielding interlayer on opposite sides, the specifications and dimensions of the top cover are compatible with the specifications and dimensions of the mounting box and the outer protective shell, the specifications and dimensions of the sealing ring strip are compatible with the specifications and dimensions of the mounting box, and ventilation holes are provided inside the two recessed placement boxes. The specifications and dimensions of the detection plug interface 2 are compatible with the specifications and dimensions of the detection plug interface 1, the position of the transparent window corresponds to the position of the display screen, and flexible handles are fixedly installed on the outer sides of both ends of the outer protective shell.

[0009] Preferably, the bottom opening partition plate and the top opening partition plate are linearly staggered and evenly distributed inside the interlayer space, the bottom opening partition plate is the outermost side at one end of the interlayer space, and the top opening partition plate is the outermost side at the other end of the interlayer space, and the bottom connecting holes and the top connecting holes are symmetrically distributed inside the interlayer space.

[0010] Preferably, the heat sink 1 is linearly and evenly distributed at the bottom of the hollow heat sink 2, and the heat sink 1 is located on opposite sides of the bottom perforated partition and the top perforated partition. The heat sink 1 is fixedly penetrated through the bottom of the inner cavity of the installation box and extends to the inner wall of the mezzanine space. The power supply component is fixed on the inner side of the heat sink 1 through the slot. A sealing sleeve is fixedly sleeved on one side of the installation box. Both ends of the sealing sleeve are fixedly sleeved through the mezzanine space and connected to the opposite sides of the installation box and the outer protective shell. An external power cable is fixedly sleeved on the inside of the sealing sleeve. One end of the external power cable is electrically connected to the input end of the power supply component.

[0011] Preferably, a submersible pump is fixedly installed inside the back of the mezzanine space, and the output end of the submersible pump is connected to a Y-shaped guide pipe. The end of the Y-shaped guide pipe away from the submersible pump is fixedly sleeved on the inner side of the bottom connecting hole, and the output end of the submersible pump is connected to a suction pipe. The bottom perforated partition, the top perforated partition and the heat dissipation plate are fixedly sleeved with a connecting pipe, and the two ends of the connecting pipe are respectively connected to the opposite sides of the bottom perforated partition and the top perforated partition.

[0012] Preferably, a refrigeration mechanism is fixedly installed on the bottom of the outer protective shell, and the refrigeration mechanism includes a refrigerator, and four mounting columns are fixedly installed on the top of the refrigerator, and the top ends of the four mounting columns are fixedly installed on the bottom of the outer protective shell, and the refrigeration surface of the top of the refrigerator is fitted with a vortex coil, and both ends of the vortex coil are connected to the inside of the mezzanine space, and the two ends of the vortex coil are respectively connected to the opposite sides of the bottom perforated partition and the top perforated partition, and the position of the water pump corresponds to the position of the two ends of the connecting pipe and the vortex coil, and the heat dissipation surface of the bottom end of the refrigerator is fitted with a heat dissipation plate three, and the bottom of the heat dissipation plate three is movably mounted with a radiator through a fan mounting frame.

[0013] Preferably, a filling mechanism is provided on one side of the top surface of the installation box, and the filling mechanism includes a sealing plug and a connecting port, the connecting port is fixedly passed through the installation box and connected to the interior of the interlayer space, the sealing plug is movably sleeved on the outside of the connecting port, and the top of the sealing plug is flush with the top of the installation box.

[0014] Preferably, the hinged seat is fixedly installed on the top of the base plate, the top of the movable column is fixedly installed with a circular plate, the outer side of the top of the movable column is sleeved with a reset spring, the top of the reset spring is fixedly installed on the bottom of the circular plate, the bottom end of the reset spring is fixedly installed on the top of the two ends of the upper clamping ring, both ends of the lower clamping ring are provided with movable slots, the movable column is sleeved on the inner side of the movable slot, four bolt holes are provided inside the base plate, two bottom connecting sockets are fixedly installed on the bottom of the base plate, two detection plug-in interfaces are fixedly installed on the top of the base plate, and two elastic detection contacts are fixedly installed on the top of the base plate by bolts.

[0015] Preferably, the specifications and dimensions of the bolt hole are compatible with the specifications and dimensions of the mounting screw seat, and the specifications and dimensions of the bottom connecting socket are compatible with the specifications and dimensions of the detection plug interface 1.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the device is in use, the user injects ice water or clean water into the interlayer space through the filling mechanism, and then installs the current transformer fixture on the inner side of the concave placement box, and clamps the current transformer on the inner side of the current transformer fixture, and then closes the acrylic sealing cover to calibrate the current transformer. During operation, water circulates inside the interlayer space through the bottom connecting hole and the top connecting hole, thereby causing the temperature inside the installation box to remain relatively stable. When the electronic components generate heat during the calibration process, the heat dissipation fan rotates to disturb the heat on the opposite side of the hollow heat dissipation plate 2 and the partition panel. The heat is transferred to the inner interlayer of the interlayer space through the heat dissipation plate 1, and then dissipated under the action of water flow. The overall structure is sealed, so that the internal and external environments of the equipment are separated, and the heat is not affected by dust, so the calibration environment is kept relatively stable, thereby indirectly extending the service life and accuracy.

[0017] 2. The mezzanine space is divided into multiple sections by setting the bottom opening partition and the top opening partition, and the water is guided by the symmetrically staggered holes of the bottom connecting holes and the top connecting holes. When the water flows through the bottom connecting holes on one side of the bottom opening partition, the water flows to the opposite side of the bottom opening partition and the top opening partition. Since the position of the top connecting hole is higher, the water moves upward through the space separated by the bottom opening partition and the top opening partition, and flows into the mezzanine section of the next top opening partition and the bottom opening partition through the top connecting hole, so as to realize the high and low circulation of water flow inside the mezzanine space, realize the complete circulation of water flow inside the mezzanine space and can perfectly wrap the inner wall of the installation box, increase the heat exchange contact surface and water flow area, increase the heat dissipation efficiency, and support the internal space of the mezzanine space, thereby ensuring the relative operation stability of the structure;

[0018] 3. Insert the bolt through the provided bolt hole and screw the bolt into the inside of the mounting screw seat, so that the current transformer fixture is placed inside the recessed placement box and fixed, which is convenient for port connection, easy to disassemble and replace the fixture, and convenient for replacement and installation of different types of fixtures to calibrate a variety of current transformers, thereby increasing the convenience of calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front three-dimensional appearance structure of the present invention.

[0020] Figure 2 It is a front perspective sectional schematic diagram of the internal structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional appearance structure of the present invention when viewed from the rear and upward.

[0022] Figure 4 It is a front cross-sectional schematic diagram of the internal structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the internal structure of the present invention from the right side.

[0024] Figure 6 It is a schematic diagram of the internal structure of the present invention viewed from the left.

[0025] Figure 7 This is a schematic diagram of the top structure of the partition panel in a top view and a cross-section of the present invention.

[0026] Figure 8 It is a schematic diagram of the internal structure of the concave placement box in a top view and a cross-section view of the present invention.

[0027] Figure 9 It is a rear cross-sectional schematic diagram of the internal structure of the present invention.

[0028] Figure 10 The figure is a front perspective structural diagram of the current transformer fixture of the present invention.

[0029] Figure 11 This is a schematic diagram of the three-dimensional appearance structure of the current transformer fixture of the present invention when viewed from the rear and upward.

[0030] Figure 12 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0031] Figure 13 For the present invention Figure 4 Enlarged structural diagram at point B in the middle.

[0032] Figure 14 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0033] Figure 15 For the present invention Figure 9 Enlarged structural diagram at point D in the middle.

[0034] In the figure: 1. Outer protective shell; 101. Mounting box; 2. Control panel; 3. Top cover; 4. Transparent window; 5. Acrylic sealing cover; 6. Electric telescopic rod; 7. Flexible handle; 8. External power cable; 9. Sealing sleeve pipe; 10. Shock-absorbing support foot; 11. Concave placement box; 12. Sealing ring strip; 13. Interlayer space; 14. Heat sink 1; 15. Hollow heat sink 2; 16. Circuit board assembly; 17. Partition panel; 18. Display screen; 19. Heat dissipation fan; 20. Connecting pipe; 21. Refrigeration mechanism; 2101. Vortex coil; 2102. Refrigerator; 2103. Heat sink 3; 2104. Radiator; 2105. Mounting column; 22. Bottom hole partition; 23. Filling mechanism; 2301. Sealing plug ;2302, connecting port;24, mounting screw seat;25, suction pipe;26, power supply assembly;27, submersible pump;28, Y-shaped guide tube;29, flexible shock-absorbing bracket;30, mounting seat;31, top opening partition;32, bottom connecting hole;33, detection plug interface one;34, detection plug interface two;35, top connecting hole;36, current transformer fixture;3601, bottom plate;3602, bolt hole;3603, detection plug interface three;3604, upper clamp ring;3605, lower clamp ring;3606, round plate;3607, movable column;3608, reset spring;3609, hinged seat;3610, hinged movable sleeve;3611, movable notch;3612, elastic detection contact;3613, bottom connecting socket. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-15The present invention provides a technical solution: a wide-range current transformer calibration device, comprising a mounting box 101 and a current transformer fixture 36, wherein the outer side of the mounting box 101 is fixedly sleeved with an outer protective shell 1, the bottom of the mounting box 101 is fixedly mounted with four shock-absorbing legs 10, the interior of the mounting box 101 is provided with a mezzanine space 13, the inner side of the mezzanine space 13 is fixedly mounted with a plurality of bottom opening partitions 22, the inner side of the mezzanine space 13 is fixedly mounted with a plurality of top opening partitions 31, the bottom end of the bottom opening partition 22 is provided with two bottom communicating holes 32, and the top of the top opening partition 31 is provided with a plurality of bottom communicating holes 32 on both sides. The top connecting hole 35 is provided, and four mounting seats 30 are fixedly installed on the bottom of the inner cavity of the mounting box 101. A hollow heat sink 2 15 is fixedly installed on the top of the four mounting seats 30. A heat dissipation fan 19 is movably installed on the top of the hollow heat sink 2 15. A plurality of heat sinks 14 are fixedly installed on the bottom of the hollow heat sink 2 15. A power supply assembly 26 is fixedly installed on the bottom of the inner cavity of the mounting box 101. A plurality of flexible shock-absorbing brackets 29 are fixedly installed on the top of the flexible shock-absorbing bracket 29. A circuit board assembly 16 is fixedly installed on the top of the flexible shock-absorbing bracket 29. A partition panel 17 is fixedly installed on the inner wall of the mounting box 101.

[0037] The current transformer fixture 36 includes a base plate 3601, an upper clamping ring 3604 and a lower clamping ring 3605. The lower clamping ring 3605 is fixedly installed on the top of the base plate 3601. The inner sides of the two ends of the upper clamping ring 3604 are movably sleeved with movable columns 3607. The outer side of the bottom end of the movable column 3607 is fixedly sleeved with an articulated movable sleeve 3610, and the outer side of the articulated movable sleeve 3610 is hingedly connected to an articulated seat 3609.

[0038] The working principle of the above technical solution is as follows: when in use, the user injects ice water or clean water into the interlayer space 13 through the filling mechanism 23, and then installs the current transformer fixture 36 on the inner side of the recessed placement box 11, and clamps the current transformer on the inner side of the current transformer fixture 36, then closes the acrylic sealing cover 5 to calibrate the current transformer. During operation, water circulates inside the interlayer space 13 through the bottom connecting hole 32 and the top connecting hole 35, thereby causing the temperature inside the installation box 101 to remain relatively stable. When the electronic components heat up during the calibration process, the heat dissipation fan 19 rotates to disturb the heat on the opposite sides of the hollow heat dissipation plate 2 15 and the partition panel 17. The heat is transferred to the inner layer of the interlayer space 13 through the heat dissipation plate 14, thereby dissipating heat under the action of water flow. The overall structure is sealed, so that the internal and external environments of the equipment are separated, heat dissipation is not affected by dust, and the calibration environment is kept relatively stable, thereby indirectly extending the service life and accuracy.

[0039] In another embodiment, Figures 1-9As shown, a display screen 18 is installed on the top of the partition panel 17, four electric telescopic rods 6 are fixedly installed on the top of the partition panel 17, a top cover 3 is fixedly installed on the top of the four electric telescopic rods 6, a sealing ring strip 12 is fixedly installed on the bottom of the top cover 3, two concave placement boxes 11 are fixedly sleeved inside the top cover 3, the tops of the two concave placement boxes 11 are movably installed with acrylic sealing cover plates 5, the bottoms of the inner cavities of the two concave placement boxes 11 are fixedly installed with four mounting screw seats 24, the bottoms of the inner cavities of the two concave placement boxes 11 are fixedly installed with two detection plug-in interfaces 33, a plurality of detection plug-in interfaces 34 are installed on the top of the partition panel 17, a transparent window 4 is fixedly installed inside the top cover 3, and a control panel 2 is installed on the front of the outer protective shell 1.

[0040] The circuit board assembly 16 is a rigid circuit board structure with a reinforced structure. The partition panel 17 provides an installation position for the display screen 18 and the detection plug interface 2 34, and provides a support position for the electric telescopic rod 6. The partition panel 17 is fixed to the inner wall of the installation box 101 by bolts. The shape of the top cover 3 matches the top of the installation box 101 and the top part boundary of the outer protective shell 1, so that the contact part with the installation box 101 is squeezed and sealed by the sealing ring strip 12. The concave placement box 11 provides an installation position for the current transformer fixture 36. When checking, open the acrylic seal. The cover plate 5 is used to place the current transformer on the inner side of the current transformer fixture 36 for clamping and calibration. A connection socket is provided for the connection between the detection plug interface 1 33 and the current transformer fixture 36. The mounting screw seat 24 provides a bolt installation position for the connection of the current transformer fixture 36. The detection plug interface 2 34 is the connection position with the detection plug interface 1 33. The transparent window 4 is convenient for observing the display information of the display screen 18, and the control panel 2 is convenient for the operator to operate the equipment from the outside. The overall operation and detection positions are separated, thereby avoiding the situation of spatial cross-flow and increasing the relative stability of the structure.

[0041] In another embodiment, Figures 1-9 As shown, the outer protective shell 1 and the installation box 101 are provided with a wrapped aluminum foil heat-insulating shielding interlayer on opposite sides, the specifications and dimensions of the top cover 3 are compatible with the specifications and dimensions of the installation box 101 and the outer protective shell 1, the specifications and dimensions of the sealing ring strip 12 are compatible with the specifications and dimensions of the installation box 101, and the two concave placement boxes 11 are provided with ventilation holes inside. The specifications and dimensions of the detection plug interface 2 34 are compatible with the specifications and dimensions of the detection plug interface 1 33. The position of the transparent window 4 corresponds to the position of the display screen 18, and flexible handles 7 are fixedly installed on the outside of both ends of the outer protective shell 1.

[0042] The outer protective shell 1 provides protection for the outside of the installation box 101, and increases the effect of heat preservation and electromagnetic radiation shielding through the wrapped aluminum foil insulation shielding interlayer, which is convenient for use with the internal structure. The top cover 3 and the top of the installation box 101 and the top of the outer protective shell 1 have the effect of matching and sealing, which is convenient for closing the top space, and the gap is sealed by the sealing ring strip 12. The flexible handle 7 facilitates the lifting of the outer protective shell 1 for easy transportation.

[0043] In another embodiment, Figure 2-Figure 14 As shown, the bottom perforated partition plate 22 and the top perforated partition plate 31 are linearly staggered and evenly distributed inside the interlayer space 13. The bottom perforated partition plate 22 is the outermost side at one end of the interlayer space 13, and the top perforated partition plate 31 is the outermost side at the other end of the interlayer space 13. The bottom connecting holes 32 and the top connecting holes 35 are symmetrically distributed inside the interlayer space 13.

[0044] The bottom opening partition plate 22 and the top opening partition plate 31 divide the interlayer space 13 into multiple sections, and the water is guided by the holes with symmetrical height offset of the bottom connecting hole 32 and the top connecting hole 35. When the water flows through the bottom connecting hole 32 on one side of the bottom opening partition plate 22, the water flows to the opposite side of the bottom opening partition plate 22 and the top opening partition plate 31. Since the position of the top connecting hole 35 is higher, the water flows upward through the space separated by the bottom opening partition plate 22 and the top opening partition plate 31, and flows into the next top opening partition plate 31 and the bottom opening partition plate 22 through the top connecting hole 35. The interlayer interval is used to realize high and low circulation of water inside the interlayer space 13, so that the water flow can circulate completely inside the interlayer space 13 and can perfectly wrap the inner wall of the installation box 101, increase the heat exchange contact surface and water flow area, increase the heat dissipation efficiency, and support the internal space of the interlayer space 13. When the top perforated partition 31 and the bottom perforated partition 22 are made of heat-conducting plate materials, they can provide heat conduction and provide support for the internal space, and cooperate with the installation box 101 to form a Faraday cage effect, thereby ensuring the relative stability of the structure.

[0045] In another embodiment, Figure 2-Figure 14 As shown, the heat sink 14 is linearly and evenly distributed at the bottom of the hollow heat sink 2 15, and the heat sink 14 is located on the opposite sides of the bottom opening partition 22 and the top opening partition 31. The heat sink 14 is fixed through the bottom of the inner cavity of the installation box 101 and extends to the inner wall of the mezzanine space 13. The power supply component 26 is fixed on the inner side of the heat sink 14 through the slot. A sealing sleeve pipe 9 is fixedly sleeved on one side of the installation box 101. Both ends of the sealing sleeve pipe 9 are fixedly sleeved through the mezzanine space 13 and connected to the opposite sides of the installation box 101 and the outer protective shell 1. The internal part of the sealing sleeve pipe 9 is fixedly sleeved with an external power cable 8. One end of the external power cable 8 is electrically connected to the input end of the power supply component 26.

[0046] The heat sink 14 provides support for one end of the bottom of the hollow heat sink 2 15 and can introduce heat into the inner side of the interlayer space 13, thereby dissipating heat to the operating space of the electronic components of the circuit board assembly 16. Heat exchange is carried out through the heat dissipation fan 19 and the hollow heat sink 2 15, and the heat is transferred to the opposite sides of the top perforated partition 31 and the bottom perforated partition 22 through the heat sink 14, and dissipated by water flow, thereby increasing the efficiency of heat exchange. The power supply component of the power supply assembly 26 includes a battery and a power adapter, which are connected to the external power cable 8 through the external power cable 8, and the sealing sleeve 9 provides space for the external power cable 8 to pass through the box, and reduces leakage, thereby solving the problems of internal and external power supply and operating heat dissipation, thereby ensuring the stability of the temperature inside the installation box 101 and increasing the relative stability of heat dissipation.

[0047] In another embodiment, Figure 2-Figure 9 As shown, a submersible pump 27 is fixedly installed inside the back of the mezzanine space 13, and the output end of the submersible pump 27 is connected to a Y-shaped guide pipe 28. The end of the Y-shaped guide pipe 28 away from the submersible pump 27 is fixedly sleeved on the inner side of the bottom connecting hole 32, and the output end of the submersible pump 27 is connected to a pumping pipe 25. The bottom perforated partition 22, the top perforated partition 31 and the heat sink 14 are fixedly sleeved with a connecting pipe 20, and the two ends of the connecting pipe 20 are respectively connected to the opposite sides of the bottom perforated partition 22 and the top perforated partition 31.

[0048] The water circulation inside the interlayer space 13 is driven by the submersible pump 27. When the interlayer space 13 is filled with water, the submersible pump 27 starts to draw away the water flow at the bottom of the interlayer space 13 through the pumping pipe 25, and introduces the water flow into the bottom connecting hole 32 through the two-way diversion of the Y-shaped guide pipe 28 to the side of the bottom opening partition 22, thereby realizing water flow promotion, thereby completely circulating the water flow, reducing the dead corner of the water flow, and indirectly ensuring the uniformity of the water flow operation. When the water flow completely flows to the side of the interlayer space 13 opposite to the submersible pump 27, the water flow is connected to the bottom of the refrigeration mechanism 21 through the connecting pipe 20 and flows back to the relative position of the pumping pipe 25. In actual operation, a valve is set at the position where the coil of the refrigeration mechanism 21 is connected to the interlayer space 13. When not in use When the cooling effect is achieved, the valve is closed to reduce the heat exchange of the water from the hot external environment. Under the action of the water flow, the flow effect of the water through the suction pipe 25 can be changed by simply changing the thickness and diameter ratio of the coil of the refrigeration mechanism 21 and the connecting pipe 20. When the pumping water flow rate of the submersible pump 27 and the suction pipe 25 is greater than the flow rate of the coil of the refrigeration mechanism 21 and the connecting pipe 20, the water flow is completely circulated. The internal bottom opening partition 22 and the top opening partition 31 divide the interlayer space 13 into multiple closed spaces, and the water flow through the Y-shaped guide pipe 28 promotes gradual circulation. That is to say, when the connecting pipe 20 is thinner, the water flows through the coil of the refrigeration mechanism 21, so that the water flow in the refrigeration mechanism 21 at a lower position can also circulate, which is convenient for external heat exchange and refrigeration.

[0049] In another embodiment, Figure 2-Figure 12 As shown, a refrigeration mechanism 21 is fixedly installed at the bottom of the outer protective shell 1, and the refrigeration mechanism 21 includes a refrigerator 2102. Four mounting columns 2105 are fixedly installed on the top of the refrigerator 2102. The top ends of the four mounting columns 2105 are fixedly installed on the bottom of the outer protective shell 1. The refrigeration surface of the top of the refrigerator 2102 is fitted with a vortex coil 2101. Both ends of the vortex coil 2101 are connected to the inside of the mezzanine space 13, and the two ends of the vortex coil 2101 are respectively connected to the opposite sides of the bottom perforated partition 22 and the top perforated partition 31. The position of the water extraction pipe 25 corresponds to the position of the two ends of the connecting pipe 20 and the vortex coil 2101. The heat dissipation surface of the bottom end of the refrigerator 2102 is fitted with a heat dissipation plate three 2103, and the bottom of the heat dissipation plate three 2103 is movably mounted with a radiator 2104 through a fan mounting frame.

[0050] When the refrigeration mechanism 21 is cooling, cooling is performed through the refrigerator 2102, and the cooling end is in contact with the spiral coil 2101 to transfer the temperature. When used in harsh environments, a thermal insulation cover is installed on the outside of the refrigeration mechanism 21, and only the heat sink three 2103 and the radiator 2104 are in contact with the outside world. When the cooling end of the refrigerator 2102 is in contact with the spiral coil 2101, the temperature is contacted and heat-conducted through the copper coil of the spiral coil 2101, thereby cooling the water flow, and the heat dissipation end of the refrigerator 2102 dissipates heat through the heat sink three 2103 and the radiator 2104, thereby achieving the effect of cooling the coil water flow, thereby increasing the temperature stability when used in hot spaces.

[0051] In another embodiment, Figure 2 、 Figure 8 and Figure 15 As shown, a filling mechanism 23 is provided on one side of the top surface of the installation box 101. The filling mechanism 23 includes a sealing plug 2301 and a connecting port 2302. The connecting port 2302 is fixedly passed through the installation box 101 and connected to the interior of the interlayer space 13. The sealing plug 2301 is movably sleeved on the outside of the connecting port 2302, and the top of the sealing plug 2301 is flush with the top of the installation box 101.

[0052] When it is necessary to add water or heat-conducting medium liquid to the interlayer space 13, the sealing plug 2301 can be pulled out from the connecting port 2302 and sealed after adding. This is convenient for adding and extracting liquid, easy for replacement, and will not affect the closed seal of the sealing ring strip 12.

[0053] In another embodiment, Figure 10 and Figure 11 As shown, the hinged seat 3609 is fixedly installed on the top of the base plate 3601, the top of the movable column 3607 is fixedly installed with a circular plate 3606, the outer side of the top of the movable column 3607 is sleeved with a return spring 3608, the top of the return spring 3608 is fixedly installed on the bottom of the circular plate 3606, the bottom end of the return spring 3608 is fixedly installed on the top of both ends of the upper clamping ring 3604, both ends of the lower clamping ring 3605 are provided with movable slots 3611, the movable column 3607 is sleeved on the inner side of the movable slot 3611, four bolt holes 3602 are provided inside the base plate 3601, two bottom connection sockets 3613 are fixedly installed on the bottom of the base plate 3601, two detection plug-in interfaces 3 3603 are fixedly installed on the top of the base plate 3601, and two elastic detection contacts 3612 are fixedly installed on the top of the base plate 3601 by bolts.

[0054] When the current transformer is placed in the current transformer fixture 36, first pull up the upper clamping ring 3604, the upper clamping ring 3604 lifts the compressed reset spring 3608, and under the limit of the circular plate 3606, the compressed elastic force of the reset spring 3608 is stored, and then the current transformer is placed on the opposite side of the upper clamping ring 3604 and the lower clamping ring 3605, and the friction with the current transformer is increased by the rubber pad. When the upper clamping ring 3604 is loosened, the elastic force of the reset spring 3608 is applied to the upper clamping ring 3604. The force causes the upper clamping ring 3604 to be clamped on the outer side of the lower clamping ring 3605 and the current transformer, thereby maintaining a relatively stable clamping effect, and connecting the current transformer port to be calibrated through the elastic detection contact 3612 or the detection plug interface 3603, which can adapt to the calibration of some different types of current transformers, is convenient for clamping and use, and different clamps can be replaced inside the recessed placement box 11 as needed, so that different specifications of clamps can be replaced according to different current transformer calibration needs, which is convenient for coordination with the calibration operation.

[0055] In another embodiment, Figure 2-Figure 11 As shown, the specifications and dimensions of the bolt hole 3602 are compatible with the specifications and dimensions of the mounting screw seat 24 , and the specifications and dimensions of the bottom connection socket 3613 are compatible with the specifications and dimensions of the detection plug interface 33 .

[0056] A bolt is inserted into the bolt hole 3602 and screwed into the inside of the mounting screw seat 24, thereby placing the current transformer fixture 36 into the inside of the recessed placement box 11 and fixing it. The detection port is connected to the detection plug interface 33 through the bottom connection socket 3613, which facilitates port connection, facilitates disassembly and replacement of the fixture, and facilitates the replacement and installation of fixtures of different models to calibrate a variety of current transformers, thereby increasing the convenience of calibration.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wide-range current transformer calibration device, comprising a mounting box (101) and a current transformer fixture (36), characterized in that: The outer side of the installation box (101) is fixedly sleeved with an outer protective shell (1), the bottom of the installation box (101) is fixedly installed with four shock-absorbing feet (10), the interior of the installation box (101) is provided with a mezzanine space (13), the inner side of the mezzanine space (13) is fixedly installed with a plurality of bottom hole partitions (22), the inner side of the mezzanine space (13) is fixedly installed with a plurality of top hole partitions (31), the bottom end of the bottom hole partition (22) is provided with two bottom connecting holes (32), the top of the top hole partition (31) is provided with top connecting holes (35) on both sides, the bottom of the inner cavity of the installation box (101) is fixedly installed with a plurality of bottom hole partitions (22), and the top of the top hole partition (31) is provided with a plurality of top hole partitions (31). There are four mounting seats (30), the tops of the four mounting seats (30) are fixedly mounted with hollow heat sink plates 2 (15), the tops of the hollow heat sink plates 2 (15) are movably mounted with heat dissipation fans (19), the bottoms of the hollow heat sink plates 2 (15) are fixedly mounted with a plurality of heat sink plates 1 (14), the bottom of the inner cavity of the mounting box (101) is fixedly mounted with a power supply assembly (26), the tops of the hollow heat sink plates 2 (15) are fixedly mounted with a plurality of flexible shock-absorbing brackets (29), the tops of the flexible shock-absorbing brackets (29) are fixedly mounted with a circuit board assembly (16), and the inner wall of the mounting box (101) is fixedly mounted with a partition panel (17); The current transformer fixture (36) comprises a base plate (3601), an upper clamping ring (3604) and a lower clamping ring (3605), wherein the lower clamping ring (3605) is fixedly mounted on the top of the base plate (3601), the inner sides of both ends of the upper clamping ring (3604) are movably sleeved with movable columns (3607), the outer sides of the bottom ends of the movable columns (3607) are fixedly sleeved with hinged movable sleeves (3610), and the outer sides of the hinged movable sleeves (3610) are hingedly connected to hinged seats (3609).

2. A wide-range current transformer calibration device according to claim 1, characterized in that: A display screen (18) is installed on the top of the partition panel (17), four electric telescopic rods (6) are fixedly installed on the top of the partition panel (17), a top cover (3) is fixedly installed on the top of the four electric telescopic rods (6), a sealing ring strip (12) is fixedly installed on the bottom of the top cover (3), two concave placement boxes (11) are fixedly sleeved inside the top cover (3), the tops of the two concave placement boxes (11) are movably installed with acrylic sealing cover plates (5), the bottoms of the inner cavities of the two concave placement boxes (11) are fixedly installed with four mounting screw seats (24), the bottoms of the inner cavities of the two concave placement boxes (11) are fixedly installed with two detection plug-in interfaces (33), the top of the partition panel (17) is installed with a plurality of detection plug-in interfaces (34), a transparent window (4) is fixedly installed inside the top cover (3), and a control panel (2) is installed on the front of the outer protective shell (1).

3. A wide-range current transformer calibration device according to claim 2, characterized in that: The outer protective shell (1) and the installation box (101) are provided with a wrapped aluminum foil heat-insulating shielding interlayer on opposite sides. The specifications and dimensions of the top cover (3) are compatible with the specifications and dimensions of the installation box (101) and the outer protective shell (1). The specifications and dimensions of the sealing ring strip (12) are compatible with the specifications and dimensions of the installation box (101). Ventilation holes are provided inside the two recessed placement boxes (11). The specifications and dimensions of the detection plug interface 2 (34) are compatible with the specifications and dimensions of the detection plug interface 1 (33). The position of the transparent window (4) corresponds to the position of the display screen (18). Flexible handles (7) are fixedly installed on the outer sides of both ends of the outer protective shell (1).

4. The wide-range current transformer calibration device according to claim 1, characterized in that: The bottom opening partition plate (22) and the top opening partition plate (31) are linearly staggered and evenly distributed inside the interlayer space (13); the bottom opening partition plate (22) is the outermost side of one end of the interlayer space (13); the top opening partition plate (31) is the outermost side of the other end of the interlayer space (13); and the bottom connecting holes (32) and the top connecting holes (35) are symmetrically distributed inside the interlayer space (13).

5. The wide-range current transformer calibration device according to claim 1, characterized in that: The heat sink one (14) is linearly and evenly distributed at the bottom of the hollow heat sink two (15), and the heat sink one (14) is located on the opposite side of the bottom opening partition (22) and the top opening partition (31), the heat sink one (14) is fixed through the bottom of the inner cavity of the installation box (101) and extends to the inner wall of the interlayer space (13), the power supply component (26) is fixed on the inner side of the heat sink one (14) through the slot, one side of the installation box (101) is fixedly sleeved with a sealing sleeve pipe (9), both ends of the sealing sleeve pipe (9) are fixedly sleeved through the interlayer space (13) and connected to the opposite sides of the installation box (101) and the outer protective shell (1), the inside of the sealing sleeve pipe (9) is fixedly sleeved with an external power cable (8), and one end of the external power cable (8) is electrically connected to the input end of the power supply component (26).

6. The wide-range current transformer calibration device according to claim 1, characterized in that: A submersible pump (27) is fixedly installed inside the back of the interlayer space (13), and the output end of the submersible pump (27) is connected to a Y-shaped guide pipe (28). The end of the Y-shaped guide pipe (28) away from the submersible pump (27) is fixedly sleeved on the inner side of the bottom connecting hole (32). The output end of the submersible pump (27) is connected to a water pump pipe (25). The bottom perforated partition (22), the top perforated partition (31) and the heat dissipation plate (14) are fixedly sleeved with a connecting pipe (20), and the two ends of the connecting pipe (20) are respectively connected to the opposite sides of the bottom perforated partition (22) and the top perforated partition (31).

7. A wide-range current transformer calibration device according to claim 6, characterized in that: A refrigeration mechanism (21) is fixedly mounted on the bottom of the outer protective shell (1), and the refrigeration mechanism (21) includes a refrigerator (2102). Four mounting posts (2105) are fixedly mounted on the top of the refrigerator (2102). The top ends of the four mounting posts (2105) are fixedly mounted on the bottom of the outer protective shell (1). A vortex coil (2101) is fixedly mounted on the refrigeration surface of the top end of the refrigerator (2102). Both ends of the vortex coil (2101) are connected to the clamp. The interior of the layer space (13), and the two ends of the vortex coil (2101) are respectively connected to the opposite sides of the bottom perforated partition (22) and the top perforated partition (31), the position of the water pumping pipe (25) corresponds to the position of the two ends of the connecting pipe (20) and the vortex coil (2101), the heat dissipation surface of the bottom end of the refrigerator (2102) is fixed with the heat dissipation plate three (2103), and the bottom of the heat dissipation plate three (2103) is movably mounted with a radiator (2104) through a fan mounting frame.

8. The wide-range current transformer calibration device according to claim 1, characterized in that: A filling mechanism (23) is provided on one side of the top surface of the installation box (101), and the filling mechanism (23) comprises a sealing plug (2301) and a communication port (2302), wherein the communication port (2302) is fixedly inserted through the installation box (101) and communicated with the interior of the interlayer space (13), and the sealing plug (2301) is movably sleeved on the outside of the communication port (2302), and the top of the sealing plug (2301) is flush with the top of the installation box (101).

9. The wide-range current transformer calibration device according to claim 3, characterized in that: The hinge seat (3609) is fixedly mounted on the top of the bottom plate (3601), the top of the movable column (3607) is fixedly mounted with a circular plate (3606), the outer side of the top of the movable column (3607) is sleeved with a return spring (3608), the top of the return spring (3608) is fixedly mounted on the bottom of the circular plate (3606), the bottom of the return spring (3608) is fixedly mounted on the top of the two ends of the upper clamping ring (3604), and both ends of the lower clamping ring (3605) are provided with There is a movable slot (3611), the movable column (3607) is sleeved on the inner side of the movable slot (3611), four bolt holes (3602) are opened inside the bottom plate (3601), two bottom connection sockets (3613) are fixedly installed on the bottom of the bottom plate (3601), two detection plug-in interfaces (3603) are fixedly installed on the top of the bottom plate (3601), and two elastic detection contacts (3612) are fixedly installed on the top of the bottom plate (3601) by bolts.

10. The wide-range current transformer calibration device according to claim 9, characterized in that: The size of the bolt hole (3602) matches the size of the mounting screw seat (24), and the size of the bottom connection socket (3613) matches the size of the detection plug interface (33).

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