Wide-range current transformer calibration device

Abstract

A wide-range current transformer verification device disclosed by the present invention comprises an installation box body and a current transformer clamp, the outer side of the installation box body is fixedly sleeved with an outer protection shell, four damping support legs are fixedly installed at the bottom of the installation box body, an interlayer space is formed in the installation box body, and the current transformer clamp is arranged in the interlayer space. A plurality of bottom perforated partition plates are fixedly mounted on the inner side of the interlayer space, a plurality of top perforated partition plates are fixedly mounted on the inner side of the interlayer space, and two bottom communicating holes are formed in the bottom ends of the bottom perforated partition plates; bolts are inserted into the bolt holes and are screwed in the mounting screw seats, so that the current transformer clamp is placed in the concave placing box and is fixed, port connection is facilitated, disassembly and replacement of the clamp are facilitated, and replacement and installation of clamps of different models are facilitated so as to verify various current transformers. And the verification convenience is improved.

Description

Technical Field

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

[0002] The principle of a current transformer is based on the principle of 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 in the circuit where the current to be measured passes through. Therefore, it often has the full current of the circuit flowing through it. The secondary winding has relatively more turns and is connected in series in the measuring instrument and the protection circuit. When the current transformer is working, its secondary circuit is always closed. Therefore, the impedance of the series coil in the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to a short circuit. A current transformer is used to convert the large current on the primary side into a small current on the secondary side, and the secondary side cannot be open-circuited. A current transformer calibration device is usually a test equipment composed 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, etc.

[0003] To calibrate a current transformer to ensure the safe operation of the equipment and evaluate the accurate working state of the equipment, a calibration device is required to calibrate the current transformer. However, the electronic components, transformers, etc. in the calibration device are sensitive to temperature. Generally speaking, its optimal operating temperature range is 20°C - 25°C. The more precise the electronic components are, the more stable their performance states are at this temperature. In the case of long-term operation or large changes in ambient temperature, the performance of the device may drift, resulting in unstable measurement results. For example, an increase in temperature may increase the core loss of the transformer, affecting its transformation ratio accuracy, and further affecting the reliability of the calibration result. Existing calibration devices mostly use fan open-air cooling, which is vulnerable to dust adsorption, reducing the cooling efficiency, and the electrical components are vulnerable in a humid environment, etc. These adverse changes in the external environment will affect the calibration operation state. If the calibration device is carried and used in special operation scenarios, it will cause certain inconvenience in use and a reduction in service life. Based on this, a wide-range current transformer calibration device is proposed. Summary of the Invention

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

[0005] To achieve the above object, the present invention provides the following technical solution: A wide-range current transformer calibration device, including an installation box body and a current transformer fixture. The outer side of the installation box body is fixedly sleeved with an outer protective shell. Four shock-absorbing feet are fixedly installed at the bottom of the installation box body. A sandwich space is provided inside the installation box body. A number of bottom-opening partitions are fixedly installed inside the sandwich space. A number of top-opening partitions are fixedly installed inside the sandwich space. Two bottom communication holes are provided inside the bottom end of the bottom-opening partition. Top communication holes are provided on both sides of the top of the top-opening partition. Four mounting seats are fixedly installed at the bottom of the inner cavity of the installation box body. A hollow-out heat dissipation plate two is fixedly installed on the top of the four mounting seats. A heat dissipation fan is movably installed on the top of the hollow-out heat dissipation plate two. A number of heat dissipation plates one are fixedly installed at the bottom of the hollow-out heat dissipation plate two. A power supply component is fixedly installed at the bottom of the inner cavity of the installation box body. A number of flexible shock-absorbing brackets are fixedly installed on the top of the hollow-out heat dissipation plate two. The top of the flexible shock-absorbing bracket is fixedly installed with a circuit board component. A partition panel is fixedly installed on the inner wall of the installation box body.

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

[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 at the bottom of the top cover. Two concave-shaped placement boxes are fixedly sleeved inside the top cover. Acrylic sealing covers are movably installed on the top of the two concave-shaped placement boxes. Four mounting screw seats are fixedly installed at the bottom of the inner cavities of the two concave-shaped placement boxes. Two detection plug-in interfaces one are fixedly installed at the bottom of the inner cavities of the two concave-shaped placement boxes. A number of detection plug-in interfaces two are installed on the top of the partition panel. A transparent window is fixedly installed inside the top cover. A control panel is installed on the front of the outer protective shell.

[0008] Preferably, a coated aluminum foil thermal insulation and shielding sandwich layer is provided on the opposite sides of the outer protective shell and the installation box body. The specification size of the top cover is adapted to the specification sizes of the installation box body and the outer protective shell. The specification size of the sealing ring strip is adapted to the specification size of the installation box body. Ventilation holes are provided inside the two concave-shaped placement boxes. The specification size of the detection plug-in interface two is adapted to the specification size of the detection plug-in interface one. The position of the transparent window corresponds to the position of the display screen. Flexible handles are fixedly installed on the outer sides of both ends of the outer protective shell.

[0009] Preferably, the bottom perforated partition and the top perforated partition are linearly and alternately and evenly distributed inside the sandwich space. The bottom perforated partition is the outermost side at one end of the sandwich space, and the top perforated partition is the outermost side at the other end of the sandwich space. The bottom communication holes and the top communication holes are symmetrically distributed inside the sandwich space.

[0010] Preferably, the first heat dissipation plates are linearly and evenly distributed at the bottom of the hollowed-out second heat dissipation plate, and the first heat dissipation plates are located on the opposite sides of the bottom perforated partition and the top perforated partition. The first heat dissipation plates are fixedly installed through the bottom of the inner cavity of the installation box body and extend to the inner wall of the sandwich space. The power supply assembly is fixedly installed through the notch on the inner side of the first heat dissipation plate. A sealing sleeve connecting pipe is fixedly sleeved on one side of the installation box body. Both ends of the sealing sleeve connecting pipe fixedly penetrate through the sandwich space and communicate to the opposite sides of the installation box body and the outer protective shell. An external power cable is fixedly sleeved inside the sealing sleeve connecting pipe. One end of the external power cable is electrically connected to the input end of the power supply assembly.

[0011] Preferably, a submersible pump is fixedly installed inside the back surface of the sandwich space. The output end of the submersible pump is communicated with a Y-shaped diversion pipe. One end of the Y-shaped diversion pipe away from the submersible pump is fixedly sleeved inside the bottom communication hole. The output end of the submersible pump is communicated with a water suction pipe. Connecting pipes are fixedly sleeved inside the bottom perforated partition, the top perforated partition and the first heat dissipation plate. Both ends of the connecting pipe are respectively communicated to the opposite sides of the bottom perforated partition and the top perforated partition.

[0012] Preferably, a refrigeration mechanism is fixedly installed at the bottom of the outer protective shell. The refrigeration mechanism includes a refrigerator. Four installation columns are fixedly installed at the top of the refrigerator. The tops of the four installation columns are fixedly installed at the bottom of the outer protective shell. A spiral coil pipe is fixedly attached to the refrigerating surface at the top of the refrigerator. Both ends of the spiral coil pipe are communicated inside the sandwich space, and both ends of the spiral coil pipe are respectively communicated to the opposite sides of the bottom perforated partition and the top perforated partition. The position of the water suction pipe corresponds to the positions of both ends of the connecting pipe and the spiral coil pipe. A third heat dissipation plate is fixedly attached to the heat dissipation surface at the bottom of the refrigerator. A radiator is movably installed at the bottom of the third heat dissipation plate through a fan mounting bracket.

[0013] Preferably, a filling mechanism is arranged on one side of the top surface of the installation box body. The filling mechanism includes a sealing plug and a communication port. The communication port is fixedly installed through the installation box body and communicated to the inside of the sandwich space. The sealing plug is movably sleeved on the outside of the communication port, and the top of the sealing plug is flush with the top of the installation box body.

[0014] Preferably, the hinge seat is fixedly installed at the top of the bottom plate. A round plate is fixedly installed at the top of the movable column. A return spring is sleeved on the outer side of the top end of the movable column. The top end of the return spring is fixedly installed at the bottom of the round plate. The bottom end of the return spring is fixedly installed at the top of both ends of the upper clamping ring. Activity notch openings are formed at both ends of the lower clamping ring. The movable column is sleeved inside the activity notch openings. Four bolt holes are formed inside the bottom plate. Two bottom connection sockets are fixedly installed at the bottom of the bottom plate. Two detection plug-in interfaces III are fixedly installed at the top of the bottom plate. Two elastic detection contacts are fixedly installed at the top of the bottom plate through bolts.

[0015] Preferably, the specification size of the bolt holes is adapted to the specification size of the installation screw base. The specification size of the bottom connection sockets is adapted to the specification size of the detection plug-in interface I.

[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, then installs the current transformer clamp inside the concave placement box, clamps the current transformer inside the current transformer clamp, and then closes the acrylic sealing cover plate to calibrate the current transformer. During operation, the water flows through the bottom communication hole and the top communication hole and circulates inside the interlayer space, so as to keep the temperature inside the installation box relatively stable. When the electronic components generate heat during the calibration process, the cooling fan rotates at this time to disturb the heat on the opposite sides of the hollow cooling plate II and the partition panel. The heat is transferred to the inner interlayer of the interlayer space through the cooling plate I, and thus is dissipated under the action of the water flow. The overall structure is sealed, so that the internal and external environments of the equipment are separated, and the heat dissipation is not affected by dust, and the calibration environment is kept relatively stable, thereby indirectly extending the service life and accuracy; 2. The interlayer space is divided into multiple sections by the arranged bottom opening partition plate and the top opening partition plate, and the water flow is guided through the holes of the bottom communication hole and the top communication hole that are symmetrically offset in height. When the water flow passes through one side of the bottom opening partition plate and flows through the bottom communication hole, the water flow reaches the opposite side of the bottom opening partition plate and the top opening partition plate at this time. Since the position of the top communication hole is relatively high, the water flow moves upward through the partitioned space of the bottom opening partition plate and the top opening partition plate and flows into the interlayer area between the next top opening partition plate and the bottom opening partition plate through the top communication hole, so as to realize the high and low circulation of the water flow inside the interlayer space, realize that the water flow completely circulates inside the interlayer space and can perfectly wrap the inner wall of the installation box, increase the heat exchange contact surface and the water flow area, increase the heat dissipation efficiency, and can support the internal space of the interlayer space, so as to ensure the relative stable operation of the structure; 3. Insert bolts through the provided bolt holes and screw the bolts inside the mounting seat, thereby placing the current transformer clamp inside the concave placement box and fixing it, facilitating port connection, disassembly and replacement of the clamp, and enabling the replacement and installation of different models of clamps to calibrate various current transformers, increasing the convenience of calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view three-dimensional external structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the front view three-dimensional sectional internal structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the rear view and upward view three-dimensional external structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the front view sectional internal structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the right view sectional internal structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the left view sectional internal structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the top structure of the sectional dividing panel in the top view of the present invention.

[0024] Figure 8 This is a schematic diagram of the internal structure of the concave placement box in the top view sectional view of the present invention.

[0025] Figure 9 This is a schematic diagram of the rear view sectional internal structure of the present invention.

[0026] Figure 10 This is a schematic diagram of the front view three-dimensional external structure of the current transformer clamp of the present invention.

[0027] Figure 11 This is a schematic diagram of the rear view and upward view three-dimensional external structure of the current transformer clamp of the present invention.

[0028] Figure 12 For the present invention Figure 3 The enlarged schematic diagram at position A.

[0029] Figure 13 For the present invention Figure 4 The enlarged schematic diagram at position B.

[0030] Figure 14 For the present invention Figure 5 The enlarged schematic diagram at position C.

[0031] Figure 15 For the present invention Figure 9 Schematic diagram of the enlarged structure at position D in the present invention.

[0032] In the figure: 1. Outer protective shell; 101. Installation box body; 2. Control panel; 3. Top cover; 4. Transparent window; 5. Acrylic sealing cover plate; 6. Electric telescopic rod; 7. Flexible handle; 8. External power cable; 9. Sealing sleeve joint; 10. Shock-absorbing support feet; 11. Concave placement box; 12. Sealing strip; 13. Interlayer space; 14. Heat dissipation plate one; 15. Hollowed-out heat dissipation plate two; 16. Circuit board assembly; 17. Partition panel; 18. Display screen; 19. Heat dissipation fan; 20. Connecting pipe; 21. Refrigeration mechanism; 2101. Spiral coil; 2102. Refrigerator; 2103. Heat dissipation plate three; 2104. Radiator; 2105. Installation column; 22. Bottom opening partition board; 23. Filling mechanism; 2301. Sealing plug; 2302. Connecting port; 24. Installation screw seat; 25. Water extraction pipe; 26. Power supply assembly; 27. Submersible pump; 28. Y-shaped diversion pipe; 29. Flexible shock-absorbing bracket; 30. Installation seat; 31. Top opening partition board; 32. Bottom connection hole; 33. Detection plug-in interface one; 34. Detection plug-in interface two; 35. Top connection hole; 36. Current transformer fixture; 3601. Bottom plate; 3602. Bolt hole; 3603. Detection plug-in interface three; 3604. Upper clamping ring; 3605. Lower clamping ring; 3606. Circular plate; 3607. Movable column; 3608. Return spring; 3609. Hinge seat; 3610. Hinge movable sleeve; 3611. Movable slot; 3612. Elastic detection contact; 3613. Bottom connection socket. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 - 15, the present invention provides a technical solution: a wide-range current transformer calibration device, which includes an installation box body 101 and a current transformer clamp 36. An outer protective shell 1 is fixedly sleeved on the outer side of the installation box body 101. Four shock-absorbing feet 10 are fixedly installed at the bottom of the installation box body 101. A sandwich space 13 is formed inside the installation box body 101. A number of bottom-opening partitions 22 are fixedly installed on the inner side of the sandwich space 13. A number of top-opening partitions 31 are fixedly installed on the inner side of the sandwich space 13. Two bottom communication holes 32 are formed inside the bottom end of the bottom-opening partition 22. Top communication holes 35 are formed on both sides of the top end of the top-opening partition 31. Four mounting seats 30 are fixedly installed at the bottom of the inner cavity of the installation box body 101. A hollow-out heat dissipation plate two 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-out heat dissipation plate two 15. A number of heat dissipation plates one 14 are fixedly installed at the bottom of the hollow-out heat dissipation plate two 15. A power supply assembly 26 is fixedly installed at the bottom of the inner cavity of the installation box body 101. A number of flexible shock-absorbing brackets 29 are fixedly installed on the top of the hollow-out heat dissipation plate two 15. The top ends of the flexible shock-absorbing brackets 29 are fixedly installed with a circuit board assembly 16. A partition panel 17 is fixedly installed on the inner wall of the installation box body 101.

[0035] The current transformer clamp 36 includes a bottom 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 bottom plate 3601. The inner sides of both ends of the upper clamping ring 3604 are movably sleeved with movable columns 3607. An articulated movable sleeve 3610 is fixedly sleeved on the outer side of the bottom end of the movable column 3607. An articulated seat 3609 is articulated on the outer side of the articulated movable sleeve 3610.

[0036] The working principle of the above technical solution: During use, the user injects ice water or clean water into the sandwich space 13 through the filling mechanism 23, then installs the current transformer clamp 36 inside the concave placement box 11, and clamps the current transformer inside the current transformer clamp 36. Then, the acrylic sealing cover plate 5 is closed to calibrate the current transformer. During operation, the water flows through the bottom communication holes 32 and the top communication holes 35 and circulates inside the sandwich space 13, so as to keep the temperature inside the installation box body 101 relatively stable. When the electronic components generate heat during the calibration process, at this time, the heat dissipation fan 19 rotates to disturb the heat on the opposite side of the hollow-out heat dissipation plate two 15 and the partition panel 17. The heat is transferred to the inner sandwich of the sandwich space 13 through the heat dissipation plate one 14, and then dissipates heat under the action of the water flow. The overall structure is sealed, so that the internal and external environments of the device are separated, and the heat dissipation is not affected by dust, and the calibration environment is kept relatively stable, thereby indirectly extending the service life and accuracy.

[0037] In another embodiment, such as Figures 1 - 9As shown in the figure, 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. The top of the four electric telescopic rods 6 is fixedly installed with a top cover 3. A sealing strip 12 is fixedly installed at the bottom of the top cover 3. Two concave placement boxes 11 are fixedly sleeved inside the top cover 3. Acrylic sealing covers 5 are movably installed on the tops of the two concave placement boxes 11. Four mounting screw seats 24 are fixedly installed at the bottoms of the inner cavities of the two concave placement boxes 11. Two detection plug-in interfaces 33 are fixedly installed at the bottoms of the inner cavities of the two concave placement boxes 11. A number 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. A control panel 2 is installed on the front of the outer protective shell 1.

[0038] The circuit board assembly 16 is a rigid circuit board structure with enhanced structure. The partition panel 17 provides installation positions for the display screen 18 and the detection plug-in interfaces 34, and provides a support position for the electric telescopic rods 6. The partition panel 17 is fixed to the inner side wall of the installation box 101 by bolts. The shape of the top cover 3 of the top cover 3 fits the boundary line between the top of the installation box 101 and the top of the outer protective shell 1. Thus, the contact part with the installation box 101 is squeezed and sealed through the sealing strip 12. The concave placement box 11 provides an installation position for the current transformer clamp 36. When calibrating, open the acrylic sealing cover 5 and place the current transformer inside the current transformer clamp 36 for clamping and calibration. The detection plug-in interface 33 provides a connection socket for the connection of the current transformer clamp 36. The mounting screw seat 24 provides a bolt installation position for the connection of the current transformer clamp 36. The detection plug-in interface 34 is the connection position with the detection plug-in interface 33. The transparent window 4 facilitates observing the display information of the display screen 18. The control panel 2 facilitates the operator to operate the device from the outside. The overall operation and detection positions are separated, thus avoiding the situation of spatial cross-flow and increasing the relative stability of the structure.

[0039] In another embodiment, as Figures 1 - 9 shown, a covered aluminum foil thermal insulation and shielding layer is provided on the relative sides of the outer protective shell 1 and the installation box 101. The specification dimensions of the top cover 3 are adapted to the specification dimensions of the installation box 101 and the outer protective shell 1. The specification dimensions of the sealing strip 12 are adapted to the specification dimensions of the installation box 101. Ventilation holes are provided inside the two concave placement boxes 11. The specification dimensions of the detection plug-in interface 34 are adapted to the specification dimensions of the detection plug-in interface 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.

[0040] The outer protective shell 1 provides protection for the outside of the installation box body 101, and through the wrapped aluminum foil thermal insulation and shielding interlayer, it increases the effects of certain heat preservation and electromagnetic radiation shielding, facilitating the cooperation with the internal structure. The top cover 3 and the top of the installation box body 101 and the top of the outer protective shell 1 play a role of fitting and sleeving to close, facilitating the closure of the top space. The sealing strip 12 is used to seal the gap, and the flexible handle 7 facilitates the lifting of the outer protective shell 1 for convenient handling.

[0041] In another embodiment, as Figures 2 - 14 shown, the bottom opening partition 22 and the top opening partition 31 are linearly and evenly staggered and distributed inside the interlayer space 13. The bottom opening partition 22 is the outermost side at one end of the interlayer space 13, and the top opening partition 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.

[0042] The bottom opening partition 22 and the top opening partition 31 divide the interlayer space 13 into multiple sections. The water flow is diverted through the holes of the bottom connecting holes 32 and the top connecting holes 35 with high and low symmetrical offsets. When the water flow passes through the bottom connecting hole 32 on one side of the bottom opening partition 22, at this time the water flow reaches the opposite side of the bottom opening partition 22 and the top opening partition 31. Due to the relatively high position of the top connecting hole 35, at this time the water flow moves upward through the space separated by the bottom opening partition 22 and the top opening partition 31 and flows into the interlayer area between the next top opening partition 31 and the bottom opening partition 22 through the top connecting hole 35, so as to realize the high and low circulation of the water flow inside the interlayer space 13, realize that the water flow completely circulates inside the interlayer space 13 and can perfectly wrap the inner wall of the installation box body 101, increase the heat exchange contact surface and the water flow area, increase the heat dissipation efficiency, and can support the inner space of the interlayer space 13. When the top opening partition 31 and the bottom opening partition 22 are made of heat-conducting plates, they can provide heat conduction and support for the inner space, cooperate with the installation box body 101 to form a Faraday cage effect, thus ensuring the relative stable operation of the structure.

[0043] In another embodiment, as Figures 2 - 14 shown, the first heat dissipation plate 14 is linearly and evenly distributed at the bottom of the hollowed-out second heat dissipation plate 15, and the first heat dissipation plate 14 is located on the opposite side of the bottom opening partition 22 and the top opening partition 31. The first heat dissipation plate 14 is fixedly penetrated through the bottom of the inner cavity of the installation box body 101 and extends to the inner wall of the interlayer space 13. The power supply assembly 26 is fixedly penetrated through the notch and fixed on the inner side of the first heat dissipation plate 14. A sealing sleeve pipe 9 is fixedly sleeved on one side of the installation box body 101. Both ends of the sealing sleeve pipe 9 are fixedly penetrated through the interlayer space 13 and communicated to the opposite sides of the installation box body 101 and the outer protective shell 1. An external power cable 8 is fixedly sleeved inside the sealing sleeve pipe 9, and one end of the external power cable 8 is electrically connected to the input end of the power supply assembly 26.

[0044] The heat dissipation plate 14 provides support for one end of the bottom of the hollow heat dissipation plate 15, and can conduct heat into the inner side of the sandwich space 13, so as to dissipate heat from 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 dissipation plate 15, and the heat is transferred to the opposite sides of the top opening partition 31 and the bottom opening partition 22 through the heat dissipation plate 14, and heat dissipation is carried out through water flow, increasing the efficiency of heat exchange. The power supply components of the power supply assembly 26 include a storage battery and a power adapter. The external power supply cable 8 is connected through the external cable, and the sealing sleeve connecting pipe 9 provides space for the external power supply cable 8 to pass through the box body and reduces leakage, thus solving the problems of internal and external power supply and heat dissipation during operation, ensuring the stability of the temperature inside the installation box body 101, and increasing the relative stability of heat dissipation.

[0045] In another embodiment, as Figures 2 - 9 shown, a submersible pump 27 is fixedly installed inside the back surface of the sandwich space 13. The output end of the submersible pump 27 is communicated with a Y-shaped diversion pipe 28. One end of the Y-shaped diversion pipe 28 far away from the submersible pump 27 is fixedly sleeved inside the bottom communication hole 32. The output end of the submersible pump 27 is communicated with a water suction pipe 25. A communication pipe 20 is fixedly sleeved inside the bottom opening partition 22, the top opening partition 31 and the heat dissipation plate 14. The two ends of the communication pipe 20 are respectively communicated with the opposite sides of the bottom opening partition 22 and the top opening partition 31.

[0046] The water circulation inside the interlayer space 13 is driven by a submersible pump 27. When the interlayer space 13 is filled with water, the submersible pump 27 is started at this time to pump away the water flow at the bottom of the interlayer space 13 through the water suction pipe 25, and is introduced into one side of the bottom communication hole 32 and the bottom opening partition plate 22 through the two-way diversion of the Y-shaped diversion pipe 28, so as to realize the water flow drive, and then the water flow is completely circulated, reducing the dead angle 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 at this time is refluxed to the relative position of the water suction pipe 25 through the bottom communication of the communication pipe 20 and the refrigeration mechanism 21. In the actual operation process, a valve is set at the connection position between the coil pipe of the refrigeration mechanism 21 and the interlayer space 13. When the refrigeration effect is not needed, the valve is closed to reduce the heat exchange of the water flow from the hot external environment. And under the action of the water flow, only by changing the ratio of the thickness and diameter of the coil pipe of the refrigeration mechanism 21 and the communication pipe 20, the flow effect of the water flow through the water suction pipe 25 can be changed. When the pumping water flow speed of the submersible pump 27 and the water suction pipe 25 is greater than the flow speed of the coil pipe of the refrigeration mechanism 21 and the communication pipe 20, the water flow is completely circulated at this time. The bottom opening partition plate 22 and the top opening partition plate 31 inside divide the interlayer space 13 into multiple closed spaces, and are gradually circulated through the water flow drive of the Y-shaped diversion pipe 28. That is to say, when the communication pipe 20 is thinner, the water flow circulates through the coil pipe of the refrigeration mechanism 21, so that the water flow can also circulate in the refrigeration mechanism 21 at a lower position, which is convenient for heat exchange and refrigeration from the outside.

[0047] In another embodiment, as Figures 2 - 12 shown, a refrigeration mechanism 21 is fixedly installed at the bottom of the outer protective shell 1. The refrigeration mechanism 21 includes a refrigerator 2102. Four mounting columns 2105 are fixedly installed at the top of the refrigerator 2102. The tops of the four mounting columns 2105 are fixedly installed at the bottom of the outer protective shell 1. A spiral coil pipe 2101 is fixedly attached to the refrigerating surface at the top of the refrigerator 2102. Both ends of the spiral coil pipe 2101 communicate with the inside of the interlayer space 13, and the two ends of the spiral coil pipe 2101 communicate with the opposite sides of the bottom opening partition plate 22 and the top opening partition plate 31 respectively. The position of the water suction pipe 25 corresponds to the positions of both ends of the communication pipe 20 and the spiral coil pipe 2101. A third heat dissipation plate 2103 is fixedly attached to the heat dissipation surface at the bottom of the refrigerator 2102. A radiator 2104 is movably installed at the bottom of the third heat dissipation plate 2103 through a fan mounting bracket.

[0048] When the refrigeration mechanism 21 performs refrigeration, it refrigerates through the refrigerator 2102. The refrigeration end contacts the spiral coil pipe 2101 to transfer the temperature. When it is used in a harsh environment, a heat insulation partition cover is installed outside the refrigeration mechanism 21, and only the third heat dissipation plate 2103 and the radiator 2104 are in contact with the outside. When the refrigeration end of the refrigerator 2102 contacts the spiral coil pipe 2101, the temperature conducts heat through contact with the copper coil pipe of the spiral coil pipe 2101, thereby cooling the water flow. The heat dissipation end of the refrigerator 2102 dissipates heat through the third heat dissipation plate 2103 and the radiator 2104, thereby achieving the effect of cooling the coil water flow and increasing the temperature stability when used in a hot space.

[0049] In another embodiment, as Figure 2 、 Figure 8 and Figure 15 shown, a filling mechanism 23 is provided on one side of the top surface of the installation box body 101. The filling mechanism 23 includes a sealing plug 2301 and a communication port 2302. The communication port 2302 is fixedly penetrated through the installation box body 101 and communicated to the inside of the interlayer space 13. The sealing plug 2301 is movably sleeved outside the communication port 2302, and the top of the sealing plug 2301 is flush with the top of the installation box body 101.

[0050] When it is necessary to add water or a heat-conducting medium liquid to the inside of the interlayer space 13, the sealing plug 2301 can be pulled out from the communication port 2302 for addition and then sealed, which is convenient for adding and pumping out the liquid, convenient for replacement, and does not affect the closing and sealing of the sealing strip 12.

[0051] In another embodiment, as Figure 10 and Figure 11 shown, the hinge seat 3609 is fixedly installed on the top of the bottom plate 3601. A round plate 3606 is fixedly installed at the top of the movable column 3607. A return spring 3608 is sleeved outside the top end of the movable column 3607. The top end of the return spring 3608 is fixedly installed at the bottom of the round plate 3606. The bottom end of the return spring 3608 is fixedly installed at the top of both ends of the upper clamping ring 3604. Activity slots 3611 are opened at both ends of the lower clamping ring 3605. The movable column 3607 is sleeved inside the activity slots 3611. Four bolt holes 3602 are opened inside the bottom plate 3601. Two bottom connection sockets 3613 are fixedly installed at the bottom of the bottom plate 3601. Two detection plug-in interfaces III 3603 are fixedly installed at the top of the bottom plate 3601. Two elastic detection contacts 3612 are fixedly installed at the top of the bottom plate 3601 through bolts.

[0052] When the current transformer is clamped inside the current transformer fixture 36, first, by pulling up the upper clamping ring 3604, the upper clamping ring 3604 lifts and compresses the return spring 3608. Under the limitation of the circular plate 3606, the compressive elastic force of the return spring 3608 is stored. 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 through the rubber pad. When the upper clamping ring 3604 is released, the elastic force of the return spring 3608 is applied by applying a force to the upper clamping ring 3604, prompting the upper clamping ring 3604 to clamp on the outside of the lower clamping ring 3605 and the current transformer, thus playing a role in relatively stably clamping. And the port of the current transformer to be calibrated is connected through the elastic detection contact 3612 or the detection plug-in interface three 3603, which can adapt to the calibration of some current transformers of different models, is convenient for clamping use, and can replace different fixtures inside the concave placement box 11 according to needs. Thus, different specifications of fixtures can be replaced according to different current transformer calibration needs, facilitating cooperation with the calibration operation.

[0053] In another embodiment, as Figures 2 - 11 shown, the specification size of the bolt hole 3602 is adapted to the specification size of the mounting socket 24, and the specification size of the bottom connection socket 3613 is adapted to the specification size of the detection plug-in interface one 33.

[0054] The bolt is inserted into the bolt hole 3602, and the bolt is screwed into the inside of the mounting socket 24, so as to place the current transformer fixture 36 inside the concave placement box 11 and fix it. And the detection port connection is made through the bottom connection socket 3613 and the detection plug-in interface one 33, which is convenient for port connection, convenient for disassembly and replacement of the fixture, and convenient for replacing and installing different models of fixtures for calibrating a variety of current transformers, increasing the convenience of calibration.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present 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: An outer protective shell (1) is fixedly sleeved on the outside of the installation box (101); four shock-absorbing feet (10) are fixedly installed on the bottom of the installation box (101); a sandwich space (13) is provided inside the installation box (101); a plurality of bottom perforated partitions (22) are fixedly installed on the inside of the sandwich space (13); a plurality of top perforated partitions (31) are fixedly installed on the inside of the sandwich space (13); two bottom communication holes (32) are provided inside the bottom end of the bottom perforated partition (22); top communication holes (35) are provided on both sides of the top end of the top perforated partition (31); and a bottom of the inner cavity of the installation box (101) is fixedly installed. 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 with 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); acrylic sealing cover plates (5) are movably installed on the tops of the two concave placement boxes (11); four mounting screw seats (24) are fixedly installed on the bottoms of the inner cavities of the two concave placement boxes (11); two detection plug-in interfaces (1) are fixedly installed on the bottoms of the inner cavities of the two concave placement boxes (11); a plurality of detection plug-in interfaces (2) (34) are fixedly 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).

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 thereof; 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 second detection plug interface (34) are compatible with the specifications and dimensions of the first detection plug interface (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 outer sides of both ends of the outer protective shell (1).

4. A wide-range current transformer calibration device according to claim 1, characterized in that: The bottom perforated partition plate (22) and the top perforated partition plate (31) are evenly distributed in a linear staggered manner inside the interlayer space (13); the bottom perforated partition plate (22) is the outermost side of one end of the interlayer space (13), and the top perforated partition plate (31) is the outermost side of 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).

5. A wide-range current transformer calibration device according to claim 1, characterized in that: The heat sink 1 (14) is linearly and evenly distributed at the bottom of the hollow heat sink 2 (15), and the heat sink 1 (14) is located on opposite sides of the bottom perforated partition plate (22) and the top perforated partition plate (31). The heat sink 1 (14) is fixedly penetrated 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 fixedly penetrated and fixed on the inner side of the heat sink 1 (14) through the notch. 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 interlayer space (13) and connected to the opposite sides of the installation box (101) and the outer protective shell (1). An external power cable (8) is fixedly sleeved inside the sealing sleeve pipe (9), and one end of the external power cable (8) is electrically connected to the input end of the power supply component (26).

6. A 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); the output end of the submersible pump (27) is connected to a Y-shaped guide pipe (28); one 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 pumping pipe (25); a connecting pipe (20) is fixedly sleeved inside the bottom perforated partition plate (22), the top perforated partition plate (31) and the heat sink plate 1 (14); the two ends of the connecting pipe (20) are respectively connected to the opposite sides of the bottom perforated partition plate (22) and the top perforated partition plate (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), the refrigeration mechanism (21) comprising 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), and both ends of the vortex coil (2101) are connected to the clamping 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 pumping pipe (25) corresponds to the positions 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 fixedly 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.

8. A 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), the filling mechanism (23) comprising a sealing plug (2301) and a connecting port (2302), the connecting port (2302) fixedly passing through the installation box (101) and connected to the interior of the interlayer space (13), the sealing plug (2301) being movably sleeved on the outside of the connecting port (2302), and the top of the sealing plug (2301) being flush with the top of the installation box (101).

9. A 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), a circular plate (3606) is fixedly mounted on the top of the movable column (3607), a return spring (3608) is sleeved on the outer side of the top of the movable column (3607), 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 both 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. A wide-range current transformer calibration device according to claim 9, characterized in that: The specification and size of the bolt hole (3602) are compatible with the specification and size of the mounting screw seat (24), and the specification and size of the bottom connection socket (3613) are compatible with the specification and size of the detection plug interface 1 (33).

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