Three-phase combined mutual inductor

Abstract

The invention provides a three-phase combined mutual inductor, and relates to the technical field of mutual inductors, the three-phase combined mutual inductor comprises a mutual inductor body, a shell, a driving mechanism and a locking mechanism, a cover plate is mounted on one side of the top of the shell, a rotating shaft is inserted into one side of the shell and one side of the cover plate, an arc-shaped groove is formed in the surface of the cover plate, and the mutual inductor body is mounted in the shell; the top end of the mutual inductor body is electrically connected with a cable, a cable channel is formed in the bottom of the other side of the cover plate, and the cable penetrates out of the bottom of the cable channel towards the outer side and then is bent along the surface of the cover plate. The anti-theft and anti-loosening functions are provided by matching with the pressed vibration sensor, and different areas in the mutual inductor body can be directly measured on the side edge of the shell by means of the driving mechanism and the temperature measuring mechanism, so that the temperature measuring range is expanded, and the temperature of the internal area of the mutual inductor body can be indirectly measured.

Description

Technical Field

[0001] The invention relates to the technical field of mutual inductors, in particular to a three-phase combined mutual inductor. Background Art

[0002] The three-phase combination transformer is usually composed of a three-phase voltage transformer and three single-phase (or two single-phase) current transformers. Its working principle is to convert high voltage into low voltage and large current into small current, so as to achieve standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. At the same time, it is also used for voltage, current and electric energy measurement and relay protection.

[0003] In the prior art, the three-phase combination transformer is provided with insulation protection by pouring epoxy resin inside, which makes the interior of the entire transformer solid. Therefore, it is impossible to directly measure the temperature of the internal current transformer or voltage transformer at a close distance, and only the temperature of the outer surface can be measured. Therefore, the temperature measurement is not accurate enough, and it is difficult to obtain heating data in different areas. On the other hand, the conventional combination transformer cable is easily affected by collision or pulling after connection, which can easily reduce the stability of the connection. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a three-phase combination transformer to solve the problems raised in the above-mentioned background technology. The present invention presses and locks the connecting cable part by rotating the locking mechanism, thereby improving the stability of the cable connection, and cooperates with the vibration sensor after being pressed to provide anti-theft and anti-loosening functions. The temperature of different areas inside the transformer body can be directly measured on the side of the shell with the help of a driving mechanism and a temperature measuring mechanism, thereby expanding the range of temperature measurement, and the internal area of ​​the transformer body can also be indirectly measured.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a three-phase combination transformer, comprising a transformer body, a shell, a driving mechanism and a locking mechanism, a cover plate is installed on one side of the top of the shell, and a rotating shaft is inserted on one side of the shell and the cover plate, an arc groove is provided on the surface of the cover plate, the transformer body is installed inside the shell, the top of the transformer body is electrically connected to the cable, a cable channel is provided at the bottom of the other side of the cover plate, the cable passes out from the bottom of the cable channel to the outside and then is bent along the surface of the cover plate, a through hole is provided on the side of the shell, the middle part of the locking mechanism is embedded in the inside of the through hole, a pressing rod is inserted on the top of the locking mechanism, the pressing rod is used to press the connected cable into the inside of the arc groove, an extension plate is welded on the surface of the shell, the end of the extension plate is installed on the driving mechanism, and a temperature measuring mechanism is provided on the surface of the driving mechanism.

[0006] Furthermore, the locking mechanism includes a power arm, a plug-in column and a resistance arm, the power arm and the resistance arm are respectively welded on the surface of the plug-in column, the top of the resistance arm is plugged and fixed with the pressing rod, a pull rod is welded on one side of the bottom of the power arm, and a second threaded sleeve is opened on the end surface of the power arm.

[0007] Furthermore, the plug-in column is embedded in the through hole, a locking bolt is inserted into the second threaded sleeve, and a locking hole is also opened on the surface of the shell. The locking bolt passes through the second threaded sleeve and then embedded in the locking hole.

[0008] Furthermore, an anti-theft component is inserted inside the arc-shaped groove, and the anti-theft component includes a support ring, a spring rod and a vibration sensor. The bottom of the support ring is welded with a spring rod, the bottom of the spring rod is screwed with a vibration sensor, and a hole is opened inside the arc-shaped groove.

[0009] Furthermore, the support ring has an overall semicircular structure, and the bottom of the connected cable is pressed against the surface of the support ring. The two ends of the spring on the spring rod are respectively connected to the bottom of the support ring and the surface of the arc groove. The support ring is used to support the bottom surface of the connected cable, and the pressing rod will be above the support ring after pressing the cable.

[0010] Furthermore, the driving mechanism includes a motor and a screw, the end of the extension plate is integrally formed with an end plate, the motor is screwed to the surface of one of the end plates, the output end of the motor is inserted with a screw, the surface of the transformer body and the shell is provided with temperature measuring holes, and an independent heat-conducting column is inserted inside each temperature measuring hole.

[0011] Furthermore, both ends of the screw rod are embedded in the end plate through bearings, one end of the temperature measuring mechanism is sleeved on the surface of the screw rod, and the central axis of each of the heat-conducting columns is on the same horizontal plane as the central axis of the screw rod.

[0012] Furthermore, the temperature measuring mechanism includes a first threaded sleeve, a transmission rod and a rotating sleeve, one end of the heat-conducting column protrudes outward from the surface of the shell, and a gap is provided between each heat-conducting column, and the transmission rod is welded to the surface of the first threaded sleeve.

[0013] Furthermore, a rotating sleeve is sleeved on the surface of the transmission rod, a gear is welded on the surface of the rotating sleeve, a detection column is installed at the end of the rotating sleeve, a plurality of slots are opened on the side of the detection column, and the gear and rack are partially meshed.

[0014] Furthermore, the slot is used to press on the surface of the thermally conductive column, the first threaded sleeve is sleeved on the surface of the screw rod, a temperature sensing module is embedded in the interior of the detection column, a thermally conductive sheet is mounted on the surface of the slot, and the detection column is in contact with and fitted to the thermally conductive column through the thermally conductive sheet.

[0015] Beneficial effects of the present invention:

[0016] 1. The three-phase combined mutual inductor presses and locks the connected cable part by rotating the locking mechanism, so that the connected cable part is pressed inside the arc groove. The stability of the cable connection is improved by means of the pressure. After each cable is pressed, it directly rests on the top of the support ring, and cooperates with the vibration sensor after pressing to provide anti-theft and anti-loosening functions, and triggers an alarm when electricity theft or severe pulling occurs.

[0017] 2. The three-phase combination transformer is provided with a plurality of interconnected temperature measuring holes on the surface of the shell and inside the transformer body. Each temperature measuring hole is close to different structural areas inside the transformer body. By embedding a high thermal conductivity thermal conductive column into the temperature measuring hole, the internal area of ​​the transformer body can be indirectly measured with the help of the thermal conductive column.

[0018] 3. The three-phase combination transformer uses a driving mechanism to drive the temperature measuring mechanism to move and rotate on the side, and the temperature measuring mechanism is moved and docked along multiple heat-conducting columns to directly measure the temperature of different areas inside the transformer body, thereby expanding the range of temperature measurement and making the moving process more stable and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a three-phase combined mutual inductor according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of a shell part of a three-phase combined mutual inductor of the present invention;

[0021] Figure 3 It is a structural schematic diagram of a cover plate portion of a three-phase combined mutual inductor of the present invention;

[0022] Figure 4 for Figure 3 A magnified image of area A;

[0023] Figure 5 It is a structural schematic diagram of the driving mechanism part of the present invention;

[0024] Figure 6 It is a schematic diagram of the temperature measuring mechanism part of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the locking mechanism part of the present invention;

[0026] In the figure: 1. shell; 2. cover plate; 3. drive mechanism; 4. locking mechanism; 5. rotating shaft; 6. mutual inductor body; 7. through hole; 8. locking hole; 9. temperature measuring hole; 10. extension plate; 11. end plate; 12. cable channel; 13. arc groove; 14. anti-theft component; 15. support ring; 16. spring rod; 17. vibration sensor; 18. heat-conducting column; 19. motor; 20. screw rod; 21. rack; 22. temperature measuring mechanism; 23. first threaded sleeve; 24. transmission rod; 25. rotating sleeve; 26. gear; 27. detection column; 28. slot; 29. ​​heat-conducting sheet; 30. temperature sensing module; 31. power arm; 32. plug-in column; 33. resistance arm; 34. pressing rod; 35. pull rod; 36. second threaded sleeve; 37. locking bolt. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7 The present invention provides the following technical solutions: a three-phase combined mutual inductor, comprising a mutual inductor body 6, a shell 1, a driving mechanism 3 and a locking mechanism 4, a cover plate 2 is installed on one side of the top of the shell 1, and a rotating shaft 5 is inserted on one side of the shell 1 and the cover plate 2, an arc groove 13 is provided on the surface of the cover plate 2, the mutual inductor body 6 is installed inside the shell 1, the top of the mutual inductor body 6 is electrically connected to the cable, a cable channel 12 is provided at the bottom of the other side of the cover plate 2, the cable passes out from the bottom of the cable channel 12 toward the outside and then bends along the surface of the cover plate 2, a through hole 7 is provided on the side of the shell 1, the middle part of the locking mechanism 4 is embedded in the inside of the through hole 7, a pressing rod 34 is inserted at the top of the locking mechanism 4, and the pressing rod 34 is used to press the connected cable into the inside of the arc groove 13, an extension plate 10 is welded on the surface of the shell 1, the end of the extension plate 10 is installed on the driving mechanism 3, and a temperature measuring mechanism 22 is sleeved on the surface of the driving mechanism 3. The three-phase combined mutual inductor can press and fix the connected cables, and provide an anti-theft function with the help of the anti-theft component 14.

[0029] When the present invention is used, after the device is fixed to the ground, the top cover 2 can be opened. At this time, the cable is directly used to connect to the terminal part on the top of the transformer body 6, and then the cable is passed through the cable channel 12 on one side of the cover 2. After the cover 2 is closed, the locking mechanism 4 is rotated to bend the cable part that has passed through toward the top until the cable is pressed against the inside of the arc groove 13 and generates an extrusion force with the anti-theft component 14, thereby completing the locking process of the cable part. Subsequently, during long-term use, by starting the driving mechanism 3, the temperature measuring mechanism 22 can be driven to move, and during the movement, it contacts and fits with each heat-conducting column 18 part in turn, thereby achieving the temperature measurement purpose of the fixed area inside the transformer body 6 corresponding to each heat-conducting column 18.

[0030] In this embodiment, the locking mechanism 4 includes a power arm 31, a plug-in column 32 and a resistance arm 33. The power arm 31 and the resistance arm 33 are respectively welded to the surface of the plug-in column 32. The top of the resistance arm 33 is plugged and fixed with the pressing rod 34. A pull rod 35 is welded to one side of the bottom of the power arm 31, and a second threaded sleeve 36 is provided on the end surface of the power arm 31. The plug-in column 32 is embedded in the through hole 7, and a locking bolt 37 is inserted into the second threaded sleeve 36. A locking hole 8 is also provided on the surface of the housing 1. The locking bolt 37 passes through the second threaded sleeve 36 and is embedded in the locking hole 8.

[0031] Specifically, by manually pulling the pull rod 35, the power arm 31 at the bottom can be driven to rotate, and the resistance arm 33 at the other end can be controlled to rotate around the middle plug-in column 32, and finally the pressing rod 34 at the top can be driven to rotate. In the process of the pressing rod 34 rotating from the oblique bottom to the top in the initial state, the cable part that has passed through the cable channel 12 can be lifted toward the top and gradually pressed against the surface of the cover plate 2 until the cable is completely pressed into the arc groove 13 and squeezed and fitted with the anti-theft component 14. At this time, the second threaded sleeve 36 at the bottom end of the power arm 31 will be aligned with the locking hole 8. Therefore, in this state, the locking bolt 37 can be directly used to fix the power arm 31 part to the outer casing 1 to ensure that the squeezing force can always be provided to the cable part.

[0032] In this embodiment, an anti-theft component 14 is inserted inside the arc groove 13, and the anti-theft component 14 includes a support ring 15, a spring rod 16 and a vibration sensor 17. The spring rod 16 is welded to the bottom of the support ring 15, and the vibration sensor 17 is screwed to the bottom of the spring rod 16. A hole is opened inside the arc groove 13. The support ring 15 is a semicircular structure as a whole, and the bottom of the connected cable is pressed on the surface of the support ring 15. The two ends of the spring on the spring rod 16 are respectively connected to the bottom of the support ring 15 and the surface of the arc groove 13. The support ring 15 is used to support the bottom surface of the connected cable, and the pressing rod 34 will be above the support ring 15 after pressing the cable. The connecting cable part is pressed and locked by rotating the locking mechanism 4, so that the connected cable part is pressed inside the arc groove 13. The stability of the cable connection is improved by virtue of the pressure. After each cable is pressed, it directly rests on the top of the supporting ring 15, and cooperates with the vibration sensor 17 after being pressed to provide anti-theft and anti-loosening functions, and trigger an alarm when power theft or severe pulling occurs.

[0033] Specifically, after the cable is pressed onto the anti-theft component 14 through the locking mechanism 4, the pressure exerted by the cable directly acts on the surface of the support ring 15, so the support ring 15 is pressed downward, and the spring rod 16 at the bottom of the support ring 15 causes the spring to be compressed and maintained in this state for use. When electricity theft or malicious damage to the cable occurs, once the cable slides or becomes loose, the pressure exerted on the support ring 15 will be changed, thereby changing the compression effect of the spring rod 16, causing the vibration sensor 17 at the bottom to vibrate and generate an electrical signal to trigger the built-in alarm system. The vibration sensor 17 and the matching alarm system are both existing mature technologies and do not fall within the scope of protection of the present invention, so their internal structure and principle will not be described in detail here.

[0034] In this embodiment, the driving mechanism 3 includes a motor 19 and a screw 20. The end of the extension plate 10 is integrally formed with an end plate 11. The motor 19 is screwed on the surface of one of the end plates 11. The output end of the motor 19 is plugged with a screw 20. The surface of the transformer body 6 and the shell 1 is provided with a temperature measuring hole 9, and each temperature measuring hole 9 is plugged with an independent heat-conducting column 18. Both ends of the screw 20 are embedded in the end plate 11 through bearings. One end of the temperature measuring mechanism 22 is sleeved on the surface of the screw 20. The central axis of each heat-conducting column 18 is on the same horizontal plane as the central axis of the screw 20. With the help of the driving mechanism 3, the temperature measuring mechanism 22 is driven to move and rotate, and the temperature measuring mechanism 22 is moved and docked along multiple heat-conducting columns 18, so that the temperature of different areas inside the transformer body 6 can be directly measured, thereby expanding the range of temperature measurement, and the moving process is more stable and accurate.

[0035] Specifically, after starting the motor 19, the motor 19 drives the screw rod 20 to rotate, and the rotation of the screw rod 20 cooperates with the first threaded sleeve 23 on the temperature measuring mechanism 22 to drive the entire temperature measuring mechanism 22 to move, and in the process of moving, it contacts with each thermal conductive column 18 in turn. In this embodiment, the thermal conductive column 18 adopts a highly thermally conductive and insulating alumina ceramic material, which is used for thermal conductivity and temperature measurement of the internal solid structure area of ​​the three-phase combination transformer.

[0036] In this embodiment, the temperature measuring mechanism 22 includes a first threaded sleeve 23, a transmission rod 24 and a rotating sleeve 25. One end of the heat-conducting column 18 is extended outward from the surface of the housing 1, and a gap is provided between each heat-conducting column 18. The transmission rod 24 is welded on the surface of the first threaded sleeve 23. The surface of the transmission rod 24 is sleeved with a rotating sleeve 25, and a gear 26 is welded on the surface of the rotating sleeve 25. A detection column 27 is installed at the end of the rotating sleeve 25. The side of the detection column 27 is provided with a plurality of slots 28, and the gear 26 and the rack 21 are partially meshed. The slot 28 is used to press on the surface of the heat-conducting column 18. The first threaded sleeve 23 is sleeved on the surface of the screw rod 20. The detection column 27 is embedded with a temperature sensing module 30. The surface of the slot 28 is mounted with a heat-conducting sheet 29, and the detection column 27 is in contact with and fits with the heat-conducting column 18 through the heat-conducting sheet 29. A plurality of interconnected temperature measuring holes 9 are provided on the surface of the outer shell 1 and inside the transformer body 6. Each temperature measuring hole 9 is close to a different structural area inside the transformer body 6. A high thermal conductivity thermal conductive column 18 is embedded into the temperature measuring hole 9, so that the internal area of ​​the transformer body 6 can be indirectly measured with the help of the thermal conductive column 18.

[0037] Specifically, by rotating the screw rod 20, the transmission rod 24 is driven to move in cooperation with the first threaded sleeve 23. After the transmission rod 24 is translated, the rotating sleeve 25 can be controlled to rotate in cooperation with the gear 26 and the rack 21. Therefore, the detection column 27 at the end of the rotating sleeve 25 will contact and fit with the surface of the heat-conducting column 18 in sequence during its own rotational movement. The temperature transferred on the heat-conducting column 18 is detected by means of the heat-conducting sheet 29. In cooperation with the temperature sensing module 30, the purpose of detecting the heating state of the heat-conducting column 18 and the electrical components embedded in the transformer body 6 can be achieved.

[0038] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A three-phase combined mutual inductor, characterized in that: The invention comprises a transformer body (6), a housing (1), a driving mechanism (3) and a locking mechanism (4); a cover plate (2) is installed on one side of the top of the housing (1); a rotating shaft (5) is inserted on one side of the housing (1) and the cover plate (2); an arc groove (13) is provided on the surface of the cover plate (2); the transformer body (6) is installed inside the housing (1); the top of the transformer body (6) is electrically connected to the cable; a cable channel (12) is provided on the bottom of the other side of the cover plate (2); the cable passes out from the bottom of the cable channel (12) toward the outside and then passes along the cover plate (2) to the outside. The outer shell (1) is bent on its surface, a through hole (7) is provided on the side of the outer shell (1), the middle part of the locking mechanism (4) is embedded in the through hole (7), a pressing rod (34) is inserted at the top end of the locking mechanism (4), and the pressing rod (34) is used to press the connected cable into the arc groove (13), an extension plate (10) is welded on the surface of the outer shell (1), the end of the extension plate (10) is installed on the driving mechanism (3), a temperature measuring mechanism (22) is sleeved on the surface of the driving mechanism (3), and a rack (21) is welded between the two extension plates (10).

2. A three-phase combined mutual inductor according to claim 1, characterized in that: The locking mechanism (4) comprises a power arm (31), a plug-in column (32) and a resistance arm (33); the power arm (31) and the resistance arm (33) are respectively welded to the surface of the plug-in column (32); the top end of the resistance arm (33) is plugged and fixed to the pressing rod (34); a pull rod (35) is welded to one side of the bottom of the power arm (31), and a second threaded sleeve (36) is provided on the end surface of the power arm (31).

3. A three-phase combined mutual inductor according to claim 2, characterized in that: The plug-in column (32) is embedded in the through hole (7), a locking bolt (37) is inserted into the interior of the second threaded sleeve (36), and a locking hole (8) is also opened on the surface of the housing (1), and the locking bolt (37) passes through the interior of the second threaded sleeve (36) and then embedded in the interior of the locking hole (8).

4. A three-phase combined mutual inductor according to claim 2, characterized in that: An anti-theft component (14) is inserted into the interior of the arc-shaped groove (13), and the anti-theft component (14) comprises a supporting ring (15), a spring rod (16) and a vibration sensor (17). The bottom of the supporting ring (15) is welded with the spring rod (16), and the bottom of the spring rod (16) is screwed with the vibration sensor (17). A hole is opened inside the arc-shaped groove (13).

5. A three-phase combined mutual inductor according to claim 4, characterized in that: The support ring (15) is of a semicircular structure as a whole, and the bottom of the connected cable is pressed against the surface of the support ring (15). The two ends of the spring on the spring rod (16) are respectively connected to the bottom of the support ring (15) and the surface of the arc groove (13). The support ring (15) is used to support the bottom surface of the connected cable. After the pressing rod (34) presses the cable, it will be above the support ring (15).

6. A three-phase combined mutual inductor according to claim 1, characterized in that: The driving mechanism (3) comprises a motor (19) and a screw (20); the end of the extension plate (10) is integrally formed with an end plate (11); the motor (19) is screwed onto the surface of one of the end plates (11); the output end of the motor (19) is plugged with a screw (20); the surface of the transformer body (6) and the housing (1) are provided with temperature measuring holes (9), and each temperature measuring hole (9) is plugged with an independent heat conducting column (18).

7. A three-phase combined mutual inductor according to claim 6, characterized in that: Both ends of the screw rod (20) are embedded in the end plate (11) through bearings, one end of the temperature measuring mechanism (22) is sleeved on the surface of the screw rod (20), and the central axis of each of the heat-conducting columns (18) is on the same horizontal plane as the central axis of the screw rod (20).

8. A three-phase combined mutual inductor according to claim 6, characterized in that: The temperature measuring mechanism (22) comprises a first threaded sleeve (23), a transmission rod (24) and a rotating sleeve (25); one end of the heat-conducting column (18) protrudes outward from the surface of the outer shell (1), and a gap is provided between each heat-conducting column (18); and the transmission rod (24) is welded to the surface of the first threaded sleeve (23).

9. A three-phase combined mutual inductor according to claim 8, characterized in that: The surface of the transmission rod (24) is sleeved with a rotating sleeve (25), the surface of the rotating sleeve (25) is welded with a gear (26), the end of the rotating sleeve (25) is installed with a detection column (27), the side of the detection column (27) is provided with a plurality of slots (28), and the gear (26) and the rack (21) are partially meshed.

10. A three-phase combined mutual inductor according to claim 9, characterized in that: The card slot (28) is used to press on the surface of the heat-conducting column (18); the first threaded sleeve (23) is sleeved on the surface of the screw rod (20); a temperature sensing module (30) is embedded in the interior of the detection column (27); a heat-conducting sheet (29) is mounted on the surface of the card slot (28); and the detection column (27) is in contact with and fitted to the heat-conducting column (18) via the heat-conducting sheet (29).

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