Wide-range current transformer calibration device

Abstract

The invention relates to the technical field of current transformers, in particular to a wide-range current transformer verification device which comprises a box body, a verification machine is fixedly connected to the inner wall of the box body, a plurality of evenly-distributed detection interfaces are fixedly connected to the outer wall of the top of the verification machine, and a control button is fixedly connected to the outer wall of the top of the verification machine. The inner wall of the box body is fixedly connected with a heat dissipation mechanism, a dual-purpose mechanism, a switching mechanism, a reciprocating mechanism and a top gathering mechanism. The switching mechanism is arranged to be matched with the motor to drive the dual-purpose mechanism to be in two states, so that the dual-purpose mechanism can keep the leakproofness of the corrugated air inlet in the non-heat-dissipation state, and the air permeability of the corrugated air inlet is enhanced in the heat dissipation state; the linkage top gathering mechanism enables negative pressure to be formed at the top ventilation plate to conduct negative pressure adsorption on dust, so that the dust is prevented from blocking the corrugated air inlet, the linkage reciprocating mechanism accelerates gathering of the dust, and the air permeability of the corrugated air inlet is enhanced.

Description

Technical Field

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

[0002] Current transformer is a device used to convert high voltage and large current into low voltage and small current. It is widely used in power systems. The calibration of current transformer is to ensure its accuracy, stability and reliability, which is crucial for the safe and stable operation of power systems. Current transformer calibration device is usually a test device composed of power module, signal conditioning module, data acquisition module, processing and control module, robotic arm and test fixture. In short, this current transformer calibration device is an automated, efficient and reliable test equipment, which provides a strong guarantee for the safe and stable operation of power systems.

[0003] The utility model patent with publication number: CN221261221U discloses a current transformer calibration device, including an installation box, two installation holes are provided at the bottom of the installation box, fans are fixedly installed on the inner walls of the two installation holes, a dust filter frame is slidably provided at the bottom of the installation hole, a plurality of card slots are provided on the side walls of the dust filter frame, a plurality of slides are slidably installed on the side walls of the two installation holes, a plurality of slides are fixedly installed on the side walls, the card blocks are adapted to the card slots, a tension spring is fixedly connected to one side of the plurality of slides away from the card block, the other end of the tension spring is fixedly connected to the bottom of the installation box, and a top block is provided at the bottom of the plurality of slides away from the tension spring; However, there are still some shortcomings in the actual use of the above: 1. The air entering and exiting the installation box is filtered through the dust filter frame, but dust is always accumulated on the entire dust filter frame, which makes the dust filter frame insufficiently permeable, resulting in poor heat dissipation effect; 2. Since the dust filter frame is a breathable structure, but the current transformer calibration device is an electrical device, when the device is not in use, water vapor and the like can easily enter the device, causing the internal electrical components to be damp and causing damage to the device. Therefore, a wide-range current transformer calibration device is proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose a wide-range current transformer calibration device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A wide-range current transformer calibration device comprises a box, the inner wall of the box is fixedly connected with a calibration machine, the top outer wall of the calibration machine is fixedly connected with a plurality of evenly distributed detection interfaces, the top outer wall of the calibration machine is fixedly connected with a heat dissipation controller, the top outer wall of the calibration machine is fixedly connected with a ground interface, the top outer wall of the calibration machine is fixedly connected with a display screen, the top outer wall of the calibration machine is fixedly connected with a control button, the inner wall of the box is fixedly connected with a heat dissipation mechanism, the heat dissipation mechanism comprises a frame, the outer wall of the frame is fixedly connected with a motor, the output shaft of the motor is fixedly connected with a fan, an installation cavity is arranged below the fan, the installation cavity is fixedly connected with the box, the outer wall of the installation cavity is fixedly connected with a corrugated air inlet, and further comprises: The dual-purpose mechanism is used to maintain the airtightness of the corrugated air inlet in the non-heat dissipation state and to enhance the air permeability of the corrugated air inlet in the heat dissipation state. The dual-purpose mechanism is installed on the corrugated air inlet; The switching mechanism is used to cooperate with the motor to drive the switching of the two states of the dual-purpose mechanism, and the switching mechanism is installed on the installation cavity; The reciprocating mechanism is used to cooperate with the dual-purpose mechanism to guide and gather dust in the heat dissipation state to prevent dust from being adsorbed on the corrugated air inlet. The reciprocating mechanism is installed on the installation cavity; And a top gathering mechanism, which is used to open the channel at the top of the corrugated air inlet when the dual-purpose mechanism is converted into a heat dissipation state, and to perform negative pressure adsorption on dust, thereby preventing dust from clogging the corrugated air inlet. The top gathering mechanism is installed on the corrugated air inlet.

[0006] Preferably, the bottom outer wall of the calibration machine is fixedly connected with a heat sink, the outer walls on both sides of the box are fixedly connected with side air outlets, and the outer walls of the two side air outlets are slidably connected with sealing slides.

[0007] Preferably, the bottom outer wall of the fan is fixedly connected to a first shaft rod, three second shaft rods are arranged below the first shaft rod, six bidirectional threaded columns are arranged below the first shaft rod, the top outer wall of each second shaft rod is fixedly connected to a first transmission gear, the top outer wall of each bidirectional threaded column is fixedly connected to a second transmission gear, the outer walls of each first transmission gear and the second transmission gear are sleeved with the same transmission chain, the first shaft rod is fixedly connected to one of the first transmission gears, the outer wall of the second shaft rod is fixedly connected to a fixed disk, the end of the second shaft rod is fixedly connected to a unidirectional threaded column, a rotating ring is arranged below the fixed disk, a plurality of first springs are fixedly connected between the rotating ring and the fixed disk, and the unidirectional threaded column and the bidirectional threaded column are both rotatably connected to the inner wall of the mounting cavity.

[0008] Preferably, the dual-purpose mechanism includes an air intake sealing plate, a third shaft, a first gear, two limit rods, two sliders and two slide rails. Two internal push rods are fixedly connected to the outer wall of the corrugated air inlet. The two sliders are slidingly connected to the slide rail through the set slide grooves and sliders. The two limit rods are respectively fixedly connected to the two sliders, the third shaft is rotatably connected to the two sliders, the air intake sealing plate is fixedly connected to the third shaft, and the first gear is fixedly connected to the end of the third shaft.

[0009] Preferably, two corrugated air inlets are provided, each corrugated air inlet is provided with six dual-purpose mechanisms, and every two adjacent dual-purpose mechanisms are symmetrically distributed.

[0010] Preferably, the switching mechanism includes two connecting rods and four rack plates, the connecting rod two is threadedly connected to the outer wall of the one-way threaded column, every two rack plates are symmetrically distributed and fixedly connected to the connecting rod two, every two rack plates are respectively slidably connected to the same corrugated air inlet, and three switching mechanisms are provided.

[0011] Preferably, the reciprocating mechanism includes a driving slide, two connecting rods and two multi-section telescopic rods. The driving slide is threadedly connected to the bidirectional threaded column, connecting rod one is fixedly connected to the driving slide, connecting rod one is fixedly connected to the multi-section telescopic rod, and the multi-section telescopic rod is fixedly connected to the limit rod. There are six reciprocating mechanisms, and every two reciprocating mechanisms are symmetrically distributed.

[0012] Preferably, the top gathering mechanism includes an inclined sliding rod, an internal push rod 1, an internal push rod 2 and a second spring. The inclined sliding rod is slidably connected to the limit rod, the second spring is fixedly connected between the inclined sliding rod and the limit rod, the internal push rod 1 is slidably connected to the inclined sliding rod, the internal push rod 2 is slidably connected to the corrugated air inlet, and a top gathering mechanism is arranged in each limit rod.

[0013] Preferably, a top sealing plate and a top ventilation plate are provided between every two internal push rods, the top sealing plate is slidably connected to the corrugated air inlet, the top ventilation plate is fixedly connected to the corrugated air inlet, the outer wall of each top sealing plate is fixedly connected to two symmetrically distributed side brackets, and two heat dissipation mechanisms are provided.

[0014] Compared with the existing technology, the advantages of this wide-range current transformer calibration device are: 1. When the air intake sealing plate falls on the limit rod, it will squeeze the inclined sliding rod to make it move downward. The inclined surface of the inclined sliding rod will push the internal push rod 1. The end of the internal push rod 1 close to the third shaft rod will conflict with the internal push rod 2. Since the bottom of the side bracket is an inclined surface, when the internal push rod 2 is pushed toward the side bracket by the internal push rod 1, the side bracket will move up with the top sealing plate, so that the top ventilation plate can be ventilated and release the sealing state; 2. Since the corrugated air inlet is designed in a zigzag corrugated state, when the fan is started inside the box, the dust is attracted by the negative pressure and gradually moves upward along the sharp corner of the corrugated air inlet to play a guiding role. When the top sealing plate is opened and negative pressure is formed at the top ventilation plate, the dust will gather at the top of the corrugated air inlet, while the air permeability of the inclined part of the corrugated air inlet, that is, the position covered by the air inlet sealing plate at the beginning, will not be affected at all; 3. In order to better promote the air permeability of the inclined part of the corrugated air inlet and accelerate the gathering of dust, the two-way threaded column rotates to drive the driving slide to move back and forth, so that the connecting rod drives the multi-section telescopic rod to drive the slider to move, so that the slider moves back and forth along the slide rail, thereby accelerating the gathering of dust and enhancing the air permeability of the corrugated air inlet, ensuring the heat dissipation effect; 4. When the heat dissipation is finished, the motor reverses to drive the device to reset. At this time, the second connecting rod is squeezed by the first spring and meshes with the one-way threaded column, thereby driving the rack plate to move down so that the air intake sealing plate is still close to the outer wall of the corrugated air inlet. When the air intake sealing plate is away from the limit rod, the top sealing plate resets by its own gravity, ensuring the airtightness of the corrugated air inlet in the non-heat dissipation state. At the same time, the two sealing slides are closed to prevent the electrical components inside the box from being damp. In summary, the present invention drives the two states of the dual-purpose mechanism by setting a switching mechanism in conjunction with a motor, so that the dual-purpose mechanism can maintain the airtightness of the corrugated air inlet in a non-heat dissipation state, and is used to enhance the air permeability of the corrugated air inlet in a heat dissipation state. When the dual-purpose mechanism is converted into a heat dissipation state, the top gathering mechanism is linked to form a negative pressure at the top ventilation plate to negatively adsorb dust, thereby preventing dust from clogging the corrugated air inlet. The linked reciprocating mechanism accelerates the gathering of dust and enhances the air permeability of the corrugated air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of the structure of the present invention after removing part of the box body; Figure 4 The present invention Figure 3 A schematic diagram of the partially enlarged structure at center A; Figure 5 It is a schematic diagram of the structure inside the installation cavity of the present invention; Figure 6 The present invention Figure 5 A schematic diagram of the partially enlarged structure at B in the middle; Figure 7 The present invention Figure 6 A schematic diagram of the partially enlarged structure at C in the middle; Figure 8 It is a structural schematic diagram of the top ventilation plate of the present invention; Fig. 9 The present invention Figure 8 The schematic diagram of the local enlarged structure at D in the middle; Fig.10 The present invention Figure 8 The schematic diagram of the local enlarged structure at E in the middle; Fig.11 The present invention Figure 8 Schematic diagram of the partially enlarged structure at point F in the middle.

[0016] In the figure: 1. Box; 2. Display screen; 3. Control button; 4. Ground wire interface; 5. Heat dissipation controller; 6. Detection interface; 7. Side air outlet; 8. Sealing slide plate; 9. Air inlet sealing plate; 10. Corrugated air inlet; 11. Verification machine; 12. Heat sink; 13. Motor; 14. Installation cavity; 15. Fan; 16. Frame; 17. First shaft; 18. Second shaft; 19. One-way threaded column; 20. Two-way threaded column; 21. Drive slide plate; 22. Top sealing plate; 23. Side bracket; 24. First transmission gear; 25. Transmission chain; 26, second transmission gear; 27, connecting rod one; 28, multi-section telescopic rod; 29, fixed plate; 30, first spring; 31, rotating ring; 32, connecting rod two; 33, rack plate; 34, third shaft; 35, first gear; 36, limit rod; 37, slider one; 38, slide rail one; 39, internal push rod one; 40, top ventilation plate; 41, inclined slide rod; 42, internal push rod two; 43, second spring; 101, reciprocating mechanism; 202, switching mechanism; 303, dual-purpose mechanism; 404, top gathering mechanism. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] Reference Figure 1-Figure 11A wide-range current transformer calibration device comprises a box body 1, a calibration machine 11 is fixedly connected to the inner wall of the box body 1, a plurality of uniformly distributed detection interfaces 6 are fixedly connected to the top outer wall of the calibration machine 11, a heat dissipation controller 5 is fixedly connected to the top outer wall of the calibration machine 11, a ground wire interface 4 is fixedly connected to the top outer wall of the calibration machine 11, a display screen 2 is fixedly connected to the top outer wall of the calibration machine 11, a control button 3 is fixedly connected to the top outer wall of the calibration machine 11, a heat dissipation mechanism is fixedly connected to the inner wall of the box body 1, the heat dissipation mechanism comprises a frame body 16, a motor 13 is fixedly connected to the outer wall of the frame body 16, a fan 15 is fixedly connected to the output shaft of the motor 13, an installation cavity 14 is arranged below the fan 15, the installation cavity 14 is fixedly connected to the box body 1, and a corrugated air inlet 10 is fixedly connected to the outer wall of the installation cavity 14, and also comprises: a dual-purpose mechanism 303, a non-dissipating It is used to maintain the airtightness of the corrugated air inlet 10 in the hot state and to enhance the air permeability of the corrugated air inlet 10 in the heat dissipation state. The dual-purpose mechanism 303 is installed on the corrugated air inlet 10; the switching mechanism 202 is used to cooperate with the motor 13 to drive the switching of the two states of the dual-purpose mechanism 303. The switching mechanism 202 is installed on the installation cavity 14; the reciprocating mechanism 101 is used to cooperate with the dual-purpose mechanism 303 to enable it to guide and gather dust in the heat dissipation state to prevent dust from being adsorbed on the corrugated air inlet 10. The reciprocating mechanism 101 is installed on the installation cavity 14; and the top gathering mechanism 404 is used to open the channel at the top of the corrugated air inlet 10 when the dual-purpose mechanism 303 is converted to the heat dissipation state, so as to perform negative pressure adsorption on the dust, thereby preventing dust from clogging the corrugated air inlet 10. The top gathering mechanism 404 is installed on the corrugated air inlet 10.

[0020] The bottom outer wall of the test machine 11 is fixedly connected with a heat sink 12, the outer walls on both sides of the box body 1 are fixedly connected with side air outlets 7, and the outer walls of the two side air outlets 7 are slidably connected with sealing slides 8.

[0021] In this embodiment, during use, when using the current transformer calibration device to calibrate the current transformer, the current transformer calibration device needs to wait for cooling after the first calibration is completed before a second calibration can be performed. After the calibration machine 11 completes the first calibration, the two sealing slides 8 are opened, and then the heat dissipation controller 5 is turned on, so that the two motors 13 drive the fan 15 to draw cold air into the heat sink 12 through the corrugated air inlet 10, thereby cooling the calibration machine 11, and then the gas is discharged from the sealing slide 8.

[0022] Among them, the bottom outer wall of the fan 15 is fixedly connected with a first shaft rod 17, three second shaft rods 18 are arranged below the first shaft rod 17, six bidirectional threaded columns 20 are arranged below the first shaft rod 17, the top outer wall of each second shaft rod 18 is fixedly connected with a first transmission gear 24, the top outer wall of each bidirectional threaded column 20 is fixedly connected with a second transmission gear 26, the outer wall of each first transmission gear 24 and the second transmission gear 26 is sleeved with the same transmission chain 25, the first shaft rod 17 is fixedly connected to one of the first transmission gears 24, the outer wall of the second shaft rod 18 is fixedly connected with a fixed disk 29, the end of the second shaft rod 18 is fixedly connected with a unidirectional threaded column 19, a rotating ring 31 is arranged below the fixed disk 29, a plurality of first springs 30 are fixedly connected between the rotating ring 31 and the fixed disk 29, and the unidirectional threaded column 19 and the bidirectional threaded column 20 are both rotatably connected to the inner wall of the mounting cavity 14.

[0023] Among them, the dual-purpose mechanism 303 includes an air intake sealing plate 9, a third shaft rod 34, a first gear 35, two limit rods 36, two sliders 37 and two slide rails 38, two internal push rods 39 are fixedly connected to the outer wall of the corrugated air inlet 10, and the two sliders 37 are slidingly connected to the slide rail 38 through the set slide groove and slider. The two limit rods 36 are fixedly connected to the two sliders 37 respectively, the third shaft rod 34 is rotatably connected to the two sliders 37, the air intake sealing plate 9 is fixedly connected to the third shaft rod 34, and the first gear 35 is fixedly connected to the end of the third shaft rod 34.

[0024] In this embodiment, when in the heat dissipation state, such as Figure 5-Figure 7 As shown, since the first shaft 17 is fixedly connected to the shaft inside the fan 15, the motor 13 rotates through the first shaft 17, the first transmission gear 24, the transmission chain 25 and the second transmission gear 26, driving the second shaft 18, the one-way threaded column 19 and the two-way threaded column 20 to rotate. It is set that the top sealing plate 22 and the air intake sealing plate 9 have a certain weight, and the air intake sealing plate 9 is heavier than the top sealing plate 22. When the second shaft 18 rotates, it drives the one-way threaded column 19 to rotate, and the one-way threaded column 19 drives the connecting rod 2 32 to move upward, so that the rack plate 33 drives the third shaft 34 and the air intake sealing plate 9 to rotate through the first gear 35, so that the air intake sealing plate 9 falls on the limiting rod 36.

[0025] There are two corrugated air inlets 10 , and each corrugated air inlet 10 is provided with six dual-purpose mechanisms 303 , and every two adjacent dual-purpose mechanisms 303 are symmetrically distributed.

[0026] Among them, the switching mechanism 202 includes a connecting rod 2 32 and four rack plates 33. The connecting rod 2 32 is threadedly connected to the outer wall of the one-way threaded column 19. Every two rack plates 33 are symmetrically distributed and fixedly connected to the connecting rod 2 32. Every two rack plates 33 are respectively slidably connected to the same corrugated air inlet 10. Three switching mechanisms 202 are provided.

[0027] Among them, the top gathering mechanism 404 includes an inclined sliding rod 41, an internal push rod 1 39, an internal push rod 2 42 and a second spring 43. The inclined sliding rod 41 is slidably connected to the limiting rod 36. The second spring 43 is fixedly connected between the inclined sliding rod 41 and the limiting rod 36. The internal push rod 1 39 is slidably connected to the inclined sliding rod 41. The internal push rod 2 42 is slidably connected to the corrugated air inlet 10. A top gathering mechanism 404 is arranged in each limiting rod 36.

[0028] Among them, a top sealing plate 22 and a top ventilation plate 40 are arranged between every two internal push rods 42, the top sealing plate 22 is slidably connected to the corrugated air inlet 10, and the top ventilation plate 40 is fixedly connected to the corrugated air inlet 10, and the outer wall of each top sealing plate 22 is fixedly connected to two symmetrically distributed side brackets 23, and two heat dissipation mechanisms are arranged.

[0029] In this embodiment, since the air intake sealing plate 9 itself has a certain weight, such as Figure 8-Figure 11 As shown, when the air intake sealing plate 9 falls on the limiting rod 36, it will squeeze the inclined sliding rod 41 to make the inclined sliding rod 41 move downward, and the inclined surface of the inclined sliding rod 41 will push the internal push rod 1 39, and the end of the internal push rod 1 39 close to the third shaft rod 34 will conflict with the internal push rod 2 42. Since the bottom of the side bracket 23 is an inclined surface, when the internal push rod 2 42 is pushed toward the side bracket 23 by the internal push rod 1 39, the side bracket 23 will move up with the top sealing plate 22 so that the top ventilation plate 40 can be ventilated to release the sealing state.

[0030] Among them, the reciprocating mechanism 101 includes a driving slide 21, two connecting rods 27 and two multi-section telescopic rods 28. The driving slide 21 is threadedly connected to the bidirectional threaded column 20, the connecting rod 27 is fixedly connected to the driving slide 21, the connecting rod 27 is fixedly connected to the multi-section telescopic rod 28, and the multi-section telescopic rod 28 is fixedly connected to the limit rod 36. There are six reciprocating mechanisms 101, and every two reciprocating mechanisms 101 are symmetrically distributed.

[0031] In the present embodiment, since the corrugated air inlet 10 is designed to be in a zigzag corrugated state, when the fan 15 is started inside the box body 1, the dust is adsorbed by the negative pressure and gradually moves upward along the sharp corners of the corrugated air inlet 10 to play a guiding role. When the top sealing plate 22 is opened and negative pressure is also formed at the top ventilation plate 40, the dust will gather at the top of the corrugated air inlet 10, while the air permeability of the inclined part of the corrugated air inlet 10, that is, the position covered by the air intake sealing plate 9 at the beginning, will not be affected at all.

[0032] At the same time, in order to better promote the air permeability of the inclined part of the corrugated air inlet 10, accelerate the accumulation of dust. Figure 6-Figure 7 As shown, the bidirectional threaded column 20 rotates to drive the driving slide 21 to move back and forth, so that the connecting rod 27 drives the multi-section telescopic rod 28 to drive the slider 37 to move, so that the slider 37 moves back and forth along the slide rail 38, thereby accelerating the accumulation of dust and enhancing the air permeability of the corrugated air inlet 10 to ensure the heat dissipation effect.

[0033] When the heat dissipation is completed, the motor 13 is reversed to drive the device to reset. Since the air intake sealing plate 9 slides back and forth along the two-way threaded column 20 with the driving slide plate 21, it is set that when the air intake sealing plate 9 slides to the end of the slide rail 1 38 with the first gear 35, the motor 13 is reversed at this time, and the connecting rod 2 32 drives the rack plate 33 to engage with the first gear 35, which can drive the air intake sealing plate 9 to rotate and close to the outer wall of the corrugated air inlet 10 again. At this time, the connecting rod 2 32 is squeezed by the first spring 30 and engages with the one-way threaded column 19, thereby driving the rack plate 33 to move downward so that the air intake sealing plate 9 is still close to the outer wall of the corrugated air inlet 10. When the air intake sealing plate 9 is away from the limit rod 36, the top sealing plate 22 is reset by its own gravity, which ensures the airtightness of the corrugated air inlet 10 in the non-heat dissipation state, and at the same time closes the two sealing slides 8, so that the electrical components inside the box body 1 will not be affected by moisture.

[0034] The specific working principle and method of use of the present invention are explained in detail below: During use, when using the current transformer calibration device to calibrate the current transformer, the current transformer calibration device needs to wait for cooling after one calibration is completed before a second calibration can be performed. After the calibration machine 11 completes one calibration, the two sealing slides 8 are opened, and then the heat dissipation controller 5 is turned on, so that the two motors 13 drive the fan 15 to draw cold air into the heat sink 12 through the corrugated air inlet 10, thereby cooling the calibration machine 11, and then the gas is discharged from the sealing slide 8.

[0035] When in the cooling state, such as Figure 5-Figure 7As shown, since the first shaft 17 is fixedly connected to the shaft inside the fan 15, the motor 13 rotates through the first shaft 17, the first transmission gear 24, the transmission chain 25 and the second transmission gear 26, driving the second shaft 18, the one-way threaded column 19 and the two-way threaded column 20 to rotate. It is set that the top sealing plate 22 and the air intake sealing plate 9 have a certain weight, and the air intake sealing plate 9 is heavier than the top sealing plate 22. When the second shaft 18 rotates, it drives the one-way threaded column 19 to rotate, and the one-way threaded column 19 drives the connecting rod 2 32 to move upward, so that the rack plate 33 drives the third shaft 34 and the air intake sealing plate 9 to rotate through the first gear 35, so that the air intake sealing plate 9 falls on the limiting rod 36.

[0036] Since the air intake sealing plate 9 itself has a certain weight, such as Figure 8-Figure 11 As shown, when the air intake sealing plate 9 falls on the limiting rod 36, it will squeeze the inclined sliding rod 41 to make the inclined sliding rod 41 move downward, and the inclined surface of the inclined sliding rod 41 will push the internal push rod 1 39, and the end of the internal push rod 1 39 close to the third shaft rod 34 will conflict with the internal push rod 2 42. Since the bottom of the side bracket 23 is an inclined surface, when the internal push rod 2 42 is pushed toward the side bracket 23 by the internal push rod 1 39, the side bracket 23 will move up with the top sealing plate 22 so that the top ventilation plate 40 can be ventilated to release the sealing state.

[0037] Since the corrugated air inlet 10 is designed to be in a zigzag state, when the fan 15 is started inside the box 1, the dust is adsorbed by the negative pressure and gradually moves upward along the sharp corners of the corrugated air inlet 10 to play a guiding role. When the top sealing plate 22 is opened and negative pressure is also formed at the top ventilation plate 40, the dust will gather at the top of the corrugated air inlet 10, while the air permeability of the inclined part of the corrugated air inlet 10, that is, the position covered by the air intake sealing plate 9 at the beginning, will not be affected at all.

[0038] At the same time, in order to better promote the air permeability of the inclined part of the corrugated air inlet 10, accelerate the accumulation of dust. Figure 6-Figure 7 As shown, the bidirectional threaded column 20 rotates to drive the driving slide 21 to move back and forth, so that the connecting rod 27 drives the multi-section telescopic rod 28 to drive the slider 37 to move, so that the slider 37 moves back and forth along the slide rail 38, thereby accelerating the accumulation of dust and enhancing the air permeability of the corrugated air inlet 10 to ensure the heat dissipation effect.

[0039] When the heat dissipation is completed, the motor 13 is reversed to drive the device to reset. Since the air intake sealing plate 9 slides back and forth along the two-way threaded column 20 with the driving slide plate 21, it is set that when the air intake sealing plate 9 slides to the end of the slide rail 1 38 with the first gear 35, the motor 13 is reversed at this time, and the connecting rod 2 32 drives the rack plate 33 to engage with the first gear 35, which can drive the air intake sealing plate 9 to rotate and close to the outer wall of the corrugated air inlet 10 again. At this time, the connecting rod 2 32 is squeezed by the first spring 30 and engages with the one-way threaded column 19, thereby driving the rack plate 33 to move downward so that the air intake sealing plate 9 is still close to the outer wall of the corrugated air inlet 10. When the air intake sealing plate 9 is away from the limit rod 36, the top sealing plate 22 is reset by its own gravity, which ensures the airtightness of the corrugated air inlet 10 in the non-heat dissipation state, and at the same time closes the two sealing slides 8, so that the electrical components inside the box body 1 will not be affected by moisture.

[0040] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wide-range current transformer calibration device, comprising a box (1), the inner wall of the box (1) being fixedly connected to a calibration machine (11), the top outer wall of the calibration machine (11) being fixedly connected to a plurality of uniformly distributed detection interfaces (6), the top outer wall of the calibration machine (11) being fixedly connected to a heat dissipation controller (5), the top outer wall of the calibration machine (11) being fixedly connected to a ground interface (4), the top outer wall of the calibration machine (11) being fixedly connected to a display screen (2), the top outer wall of the calibration machine (11) being fixedly connected to a control button (3), the inner wall of the box (1) being fixedly connected to a heat dissipation mechanism, the heat dissipation mechanism comprising a frame (16), the outer wall of the frame (16) being fixedly connected to a motor (13), the output shaft of the motor (13) being fixedly connected to a fan (15), an installation cavity (14) being arranged below the fan (15), the installation cavity (14) being fixedly connected to the box (1), the outer wall of the installation cavity (14) being fixedly connected to a corrugated air inlet (10), characterized in that: Also includes: A dual-purpose mechanism (303) is used to maintain the airtightness of the corrugated air inlet (10) in a non-heat dissipation state, and is used to enhance the air permeability of the corrugated air inlet (10) in a heat dissipation state. The dual-purpose mechanism (303) is installed on the corrugated air inlet (10); A switching mechanism (202) is used to cooperate with the motor (13) to drive the dual-purpose mechanism (303) to switch between two states, and the switching mechanism (202) is installed on the installation cavity (14); The reciprocating mechanism (101) is used to cooperate with the dual-purpose mechanism (303) to guide and gather dust in a heat dissipation state, thereby preventing dust from being adsorbed on the corrugated air inlet (10); the reciprocating mechanism (101) is installed on the installation cavity (14); and a top gathering mechanism (404) for opening the channel at the top of the corrugated air inlet (10) when the dual-purpose mechanism (303) is switched to a heat dissipation state, so as to perform negative pressure adsorption on dust, thereby preventing dust from clogging the corrugated air inlet (10); the top gathering mechanism (404) is mounted on the corrugated air inlet (10).

2. A wide-range current transformer calibration device according to claim 1, characterized in that: The bottom outer wall of the calibration machine (11) is fixedly connected to a heat sink (12), the outer walls on both sides of the box body (1) are fixedly connected to side air outlets (7), and the outer walls of the two side air outlets (7) are slidably connected to sealing slide plates (8).

3. A wide-range current transformer calibration device according to claim 2, characterized in that: The bottom outer wall of the fan (15) is fixedly connected to a first shaft rod (17), three second shaft rods (18) are arranged below the first shaft rod (17), six bidirectional threaded columns (20) are arranged below the first shaft rod (17), the top outer wall of each second shaft rod (18) is fixedly connected to a first transmission gear (24), the top outer wall of each bidirectional threaded column (20) is fixedly connected to a second transmission gear (26), and the outer walls of each first transmission gear (24) and second transmission gear (26) are sleeved with the same transmission chain (25).

4. A wide-range current transformer calibration device according to claim 3, characterized in that: The first shaft (17) is fixedly connected to one of the first transmission gears (24); a fixed disk (29) is fixedly connected to the outer wall of the second shaft (18); a one-way threaded column (19) is fixedly connected to the end of the second shaft (18); a rotating ring (31) is provided below the fixed disk (29); a plurality of first springs (30) are fixedly connected between the rotating ring (31) and the fixed disk (29); and both the one-way threaded column (19) and the two-way threaded column (20) are rotatably connected to the inner wall of the installation cavity (14).

5. A wide-range current transformer calibration device according to claim 4, characterized in that: The dual-purpose mechanism (303) comprises an air intake sealing plate (9), a third shaft (34), a first gear (35), two limit rods (36), two sliders (37) and two slide rails (38); two internal push rods (39) are fixedly connected to the outer wall of the corrugated air intake (10); the two sliders (37) are slidably connected to the slide rails (38) via provided slide grooves and slides; the two limit rods (36) are respectively fixedly connected to the two sliders (37); the third shaft (34) is rotatably connected to the two sliders (37); the air intake sealing plate (9) is fixedly connected to the third shaft (34); and the first gear (35) is fixedly connected to the end of the third shaft (34).

6. A wide-range current transformer calibration device according to claim 5, characterized in that: Two corrugated air inlets (10) are provided, and each corrugated air inlet (10) is provided with six dual-purpose mechanisms (303), and every two adjacent dual-purpose mechanisms (303) are symmetrically distributed.

7. A wide-range current transformer calibration device according to claim 6, characterized in that: The switching mechanism (202) comprises a second connecting rod (32) and four rack plates (33); the second connecting rod (32) is threadedly connected to the outer wall of the one-way threaded column (19); every two rack plates (33) are symmetrically distributed and fixedly connected to the second connecting rod (32); every two rack plates (33) are respectively slidably connected to the same corrugated air inlet (10); and three switching mechanisms (202) are provided.

8. A wide-range current transformer calibration device according to claim 7, characterized in that: The reciprocating mechanism (101) comprises a driving slide plate (21), two connecting rods (27) and two multi-section telescopic rods (28); the driving slide plate (21) is threadedly connected to the bidirectional threaded column (20); the connecting rod (27) is fixedly connected to the driving slide plate (21); the connecting rod (27) is fixedly connected to the multi-section telescopic rod (28); the multi-section telescopic rod (28) is fixedly connected to the limit rod (36); six reciprocating mechanisms (101) are provided, and every two reciprocating mechanisms (101) are symmetrically distributed.

9. A wide-range current transformer calibration device according to claim 8, characterized in that: The top gathering mechanism (404) comprises an inclined sliding rod (41), an internal push rod 1 (39), an internal push rod 2 (42) and a second spring (43); the inclined sliding rod (41) is slidably connected to the limiting rod (36); the second spring (43) is fixedly connected between the inclined sliding rod (41) and the limiting rod (36); the internal push rod 1 (39) is slidably connected to the inclined sliding rod (41); the internal push rod 2 (42) is slidably connected to the corrugated air inlet (10); and each limiting rod (36) is provided with a top gathering mechanism (404).

10. A wide-range current transformer calibration device according to claim 9, characterized in that: A top sealing plate (22) and a top ventilation plate (40) are provided between each two internal push rods (42); the top sealing plate (22) is slidably connected to the corrugated air inlet (10); the top ventilation plate (40) is fixedly connected to the corrugated air inlet (10); the outer wall of each top sealing plate (22) is fixedly connected to two symmetrically distributed side brackets (23); and two heat dissipation mechanisms are provided.

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