A three-phase through-core current transformer

Abstract

The utility model relates to the technical field of current transformers, specifically a three-phase through-type current transformer, comprising a lower shell and an upper shell, the outer side of the lower shell is fixedly connected with the upper shell by bolts, the current transformer is fixedly installed in the upper shell, a heat conduction component is arranged on the outer side of the current transformer, a cooling component is arranged in the upper shell, the heat conduction component comprises a sleeve, a heat conduction pipe and a heat dissipation pipe, a sleeve is arranged on the outer side of the current transformer, a heat conduction pipe is arranged between the current transformers, and a heat dissipation pipe is arranged on the surface of the heat conduction pipe. The utility model connects the sleeve with the current transformer through the arrangement of the heat conduction component, transfers the heat generated by the current transformer to the heat conduction pipe through the sleeve and the heat dissipation pipe, increases the heat dissipation area, facilitates the heat dissipation of the current transformer, solves the problem of unstable performance caused by the heat energy generated by the magnetic core and coil of the current transformer, and reduces the service life of the current transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a three-phase through-core current transformer. Background Art

[0002] A three-phase current transformer is an electrical device used to transform high current in a circuit into standard current. It is a voltage transformer based on the principle of electromagnetic induction, used to transform high voltage current into relatively small current for the protection and measurement of power systems.

[0003] Three-phase current transformers are mainly divided into two categories: iron core current transformers and air core current transformers. Among them, iron core current transformers are a type of transformer with high sensitivity and accuracy, used to accurately measure parameters such as current, voltage and power; air core current transformers are widely used in the protection and monitoring of power systems due to their low cost and easy installation.

[0004] After searching, the patent application number is (201821776600.7), which discloses "a three-phase current transformer", including an upper part of a three-phase current transformer and a lower part of a three-phase current transformer. The upper part of the three-phase current transformer is connected to the upper end of the lower part of the three-phase current transformer, and the bottom end of the lower part of the three-phase current transformer is fixedly connected to a base. The lower part of the three-phase current transformer and one end of the upper part of the three-phase current transformer are connected to a hinge seat; the device forms an openable threading hole of the current transformer by connecting the combined three-phase current transformer up and down. When the wire needs to be inspected or the transformer needs to be inspected on a daily basis, it can be directly opened, saving time and effort; the upper and lower connections of the three-phase current transformer can be manually operated, and a protective cover is provided on the outside of the connection. In some necessary cases, the protective cover is locked and connected, which is safer.

[0005] However, the above device has the following problems: when the current transformer is in operation, the magnetic core and coil of the current transformer generate heat energy, resulting in unstable performance. The existing current transformer lacks heat dissipation and cooling components. The current transformer can only rely solely on the shell for heat transfer to dissipate heat and cool down. The heat dissipation effect is limited, which reduces the service life of the current transformer. For this reason, we propose a three-phase through-core current transformer to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a three-phase through-type current transformer to solve the problem that the existing current transformer mentioned in the above background technology lacks heat dissipation and cooling components, and the current transformer can only rely solely on the shell for heat transfer to dissipate heat and cool down, and the heat dissipation effect is limited, which reduces the service life of the current transformer.

[0007] To achieve the above object, the utility model provides the following technical solution: a three-phase through-type current transformer, comprising a lower shell and an upper shell, the outer side of the lower shell is fixedly connected to the upper shell by bolts, the current transformer is fixedly installed in the upper shell, a heat conduction component is arranged on the outer side of the current transformer, and a cooling component is arranged in the upper shell.

[0008] The current transformer comprises an insulating tube frame, a transformer body and a heat dissipation sleeve. The insulating tube frame is fixedly installed in the lower shell, the transformer body is fixedly connected to the outer side of the insulating tube frame, and the heat dissipation sleeve is sleeved on the outer surface of the transformer body.

[0009] The heat conduction component comprises a sleeve, a heat conduction pipe and a heat dissipation pipe. The sleeve is arranged on the outer side of the current transformer, the heat conduction pipe is arranged between the current transformers, and the heat dissipation pipe is arranged on the surface of the heat conduction pipe.

[0010] Preferably, the cooling assembly includes a water pump, a connecting pipe, a mounting plate and an exhaust fan. The water pump is fixedly installed on the surface of the heat dissipation pipe, two groups of connecting pipes are fixedly connected to the front end of the water pump, a mounting plate is fixedly installed on the inner wall of the upper shell, the other end of the connecting pipe is connected to the mounting plate, and three groups of exhaust fans are fixedly installed in the mounting plate.

[0011] Preferably, the sleeve is wrapped around the outer surface of the current transformer and connected to the current transformer, the heat dissipation pipe is wrapped around the surface of the heat pipe and connected to the heat pipe, the sleeve is connected to the heat pipe, and the front and rear ends of the heat pipe are fixedly connected to the inner wall of the lower shell.

[0012] Preferably, a baffle is fixedly connected to the left side of the upper shell, a plurality of heat dissipation holes are equidistantly provided on the surface of the baffle, and a connecting hole is provided on the right side of the upper shell.

[0013] Preferably, both the front and rear sides of the lower shell are provided with threading holes, and the positions of the threading holes correspond to the current transformers.

[0014] Preferably, two groups of wire insertion slots are fixedly installed on the upper surface of the upper shell, and three groups of wiring holes are equidistantly opened on the left side of the upper shell.

[0015] Preferably, two groups of positioning holes are equidistantly provided on the right edge of the lower shell, the edge of the lower shell is rounded, and a handle is fixedly connected to the upper surface of the upper shell.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model connects the sleeve with the current transformer by setting a heat-conducting component, transfers the heat generated by the current transformer to the heat-conducting tube through the sleeve and the heat-dissipating tube, increases the heat-dissipating area, facilitates the heat dissipation of the current transformer, solves the problem of unstable performance caused by the heat energy generated by the magnetic core and coil of the current transformer, and reduces the service life of the current transformer.

[0018] 2. The utility model adopts the setting of cooling components, and the coolant circulated by the water pump brings out the heat absorbed by the heat conducting pipe and the heat dissipating pipe. The hot water flows into the mounting plate through the connecting pipe, is cooled by the exhaust fan, and is converted back into cold water and transported to the water pump again, starting a new round of heat exchange. Compared with heat dissipation by heat transfer from the shell, the heat dissipation effect is better.

[0019] 3. The utility model ensures the stability and accuracy of the output signal during installation through the positioning hole, and tries to avoid interference with other electrical equipment. In addition, the lower shell is connected to the upper shell to reduce the influence of external interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic front view of the structure of the present utility model.

[0022] Figure 2 It is a structural schematic diagram of the heat conduction component of the utility model.

[0023] Figure 3 It is a schematic diagram of the structure of the cooling component of the utility model.

[0024] In the figure: 1. lower shell; 2. upper shell; 3. current transformer; 31. insulating tube frame; 32. transformer body; 33. heat dissipation sleeve; 4. heat conduction component; 41. sleeve; 42. heat conduction pipe; 43. heat dissipation pipe; 5. cooling component; 51. water pump; 52. connecting pipe; 53. mounting plate; 54. exhaust fan; 6. baffle; 7. heat dissipation hole; 8. threading hole; 9. wire slot; 10. connection hole; 11. positioning hole; 12. handle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-3 The utility model provides an embodiment: a three-phase through-type current transformer, comprising a lower shell 1 and an upper shell 2, the outer side of the lower shell 1 is fixedly connected to the upper shell 2 by bolts, a current transformer 3 is fixedly installed in the upper shell 2, a heat conduction component 4 is arranged on the outer side of the current transformer 3, and a cooling component 5 is arranged in the upper shell 2;

[0027] The current transformer 3 comprises an insulating tube frame 31, a transformer body 32 and a heat dissipation sleeve 33. The insulating tube frame 31 is fixedly installed in the lower shell 1, the transformer body 32 is fixedly connected to the outer side of the insulating tube frame 31, and the heat dissipation sleeve 33 is sleeved on the outer surface of the transformer body 32;

[0028] The heat conducting component 4 includes a sleeve 41, a heat conducting pipe 42 and a heat dissipation pipe 43. The sleeve 41 is arranged outside the current transformer 3, the heat conducting pipe 42 is arranged between the current transformer 3, and the heat dissipation pipe 43 is arranged on the surface of the heat conducting pipe 42;

[0029] The device solves the problem that the existing current transformer lacks heat dissipation and cooling components by setting up the heat conduction component 4 and the cooling component 5. The current transformer can only rely on the shell to transfer heat to dissipate heat and cool down, and the heat dissipation effect is limited, which reduces the service life of the current transformer.

[0030] Furthermore, the cooling assembly 5 includes a water pump 51, a connecting pipe 52, a mounting plate 53 and an exhaust fan 54. The surface of the heat dissipation pipe 43 is fixedly mounted with the water pump 51, the front end of the water pump 51 is fixedly connected with two groups of connecting pipes 52, the inner wall of the upper shell 2 is fixedly mounted with a mounting plate 53, the other end of the connecting pipe 52 is connected to the mounting plate 53, and three groups of exhaust fans 54 are fixedly mounted in the mounting plate 53. Figure 3 As shown, the structure is used to circulate the coolant through the water pump 51 to bring out the heat absorbed by the heat pipe 42 and the heat dissipation pipe 43. The hot water flows into the mounting plate 53 through the connecting pipe 52, is cooled by the exhaust fan 54, and is converted back into cold water and transported back to the water pump 51 to continuously cool the current transformer 3.

[0031] Furthermore, the sleeve 41 is wound around the outer surface of the current transformer 3 and connected to the current transformer 3, the heat dissipation pipe 43 is wound around the surface of the heat conduction pipe 42 and connected to the heat conduction pipe 42, the sleeve 41 is connected to the heat conduction pipe 42, and the front and rear ends of the heat conduction pipe 42 are fixedly connected to the inner wall of the lower shell 1, and the sleeve 41, the heat conduction pipe 42 and the heat dissipation pipe 43 are all made of copper. Figure 2 As shown, the structure is used to connect with the lower shell 1 through the sleeve 41, transfer the heat to the heat pipe 42 through the heat dissipation pipe 43, increase the heat dissipation area, and facilitate heat dissipation.

[0032] Furthermore, a baffle 6 is fixedly connected to the left side of the upper shell 2, and a plurality of heat dissipation holes 7 are evenly spaced on the surface of the baffle 6, and a connecting hole is opened on the right side of the upper shell 2. Figure 2 As shown, the structure is used to discharge the hot air in the lower shell 1 and the upper shell 2 through the heat dissipation holes 7 to facilitate heat exchange.

[0033] Furthermore, the lower shell 1 is provided with threading holes 8 on both the front and rear sides, and the positions of the threading holes 8 correspond to the current transformer 3. Figure 1 As shown, this structure is used to facilitate the connection of the transformer body 32 through the threading hole 8.

[0034] Furthermore, two sets of wiring slots 9 are fixedly mounted on the upper surface of the upper shell 2, and three sets of wiring holes 10 are evenly spaced on the left side of the upper shell 2. Figure 1 As shown, the structure is used to facilitate connection with external equipment through the wiring slot 9, and fix the direction and layout of the line through the connection hole 10 to avoid interference with other electrical equipment as much as possible.

[0035] Furthermore, two groups of positioning holes 11 are equidistantly provided at the right edge of the lower shell 1, the edge of the lower shell 1 is rounded, and a handle 12 is fixedly connected to the upper surface of the upper shell 2 for easy transportation. As shown in the figure, the structure is used to facilitate the fixed-point installation of the lower shell 1 through the positioning holes 11, ensuring the stability and accuracy of the output signal to reduce the influence of external interference.

[0036] Working principle: When used, Figure 1 As shown, the device is fixed to the designated position through the positioning hole 11, and then the current transformer 3 is connected to the external device through the wire slot 9, the wire hole 10 and the wire hole 8 to ensure a firm connection. When the current transformer 3 is in operation, Figure 2 As shown, the current transformer 3 generates heat, and the heat is transferred to the heat pipe 42 through the sleeve 41 and the heat pipe 43. Figure 3As shown, the water pump 51 and the exhaust fan 54 are started, and the coolant circulated by the water pump 51 brings out the heat absorbed by the heat pipe 42 and the heat dissipation pipe 43, and the hot water flows into the mounting plate 53 through a set of connecting pipes 52, is cooled by the exhaust fan 54, and is converted back into cold water and re-delivered to the water pump 51 through another set of connecting pipes 52, starting a new round of heat exchange. At the same time, the rotation of the exhaust fan 54 discharges the hot air in the lower shell 1 and the upper shell 2 from the heat dissipation holes 7. Compared with relying on heat transfer from the shell to dissipate heat, the heat dissipation effect is better. The above is the entire working principle of the utility model.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A three-phase through-type current transformer, comprising a lower shell (1) and an upper shell (2), characterized in that: The outer side of the lower shell (1) is fixedly connected to the upper shell (2) by bolts, a current transformer (3) is fixedly installed in the upper shell (2), a heat conduction component (4) is arranged on the outer side of the current transformer (3), and a cooling component (5) is arranged in the upper shell (2). The current transformer (3) comprises an insulating tube frame (31), a transformer body (32) and a heat dissipation sleeve (33); the insulating tube frame (31) is fixedly installed in the lower shell (1); the outer side of the insulating tube frame (31) is fixedly connected to the transformer body (32); and the outer surface of the transformer body (32) is sleeved with the heat dissipation sleeve (33); The heat conduction component (4) comprises a sleeve (41), a heat conduction pipe (42) and a heat dissipation pipe (43); the sleeve (41) is arranged outside the current transformer (3); the heat conduction pipe (42) is arranged between the current transformers (3); and the heat dissipation pipe (43) is arranged on the surface of the heat conduction pipe (42).

2. A three-phase through-core current transformer according to claim 1, characterized in that: The cooling assembly (5) comprises a water pump (51), a connecting pipe (52), a mounting plate (53) and an exhaust fan (54); the water pump (51) is fixedly mounted on the surface of the heat dissipation pipe (43); the front end of the water pump (51) is fixedly connected to two groups of connecting pipes (52); the inner wall of the upper shell (2) is fixedly mounted with a mounting plate (53); the other end of the connecting pipe (52) is connected to the mounting plate (53); and three groups of exhaust fans (54) are fixedly mounted inside the mounting plate (53).

3. A three-phase through-core current transformer according to claim 1, characterized in that: The sleeve (41) is wound around the outer surface of the current transformer (3) and connected to the current transformer (3); the heat dissipation pipe (43) is wound around the surface of the heat conduction pipe (42) and connected to the heat conduction pipe (42); the sleeve (41) is connected to the heat conduction pipe (42); and the front and rear ends of the heat conduction pipe (42) are fixedly connected to the inner wall of the lower shell (1).

4. A three-phase through-core current transformer according to claim 1, characterized in that: A baffle (6) is fixedly connected to the left side of the upper shell (2), a plurality of heat dissipation holes (7) are equidistantly provided on the surface of the baffle (6), and a communication hole is provided on the right side of the upper shell (2).

5. A three-phase through-core current transformer according to claim 1, characterized in that: The lower shell (1) is provided with threading holes (8) on both the front and rear sides, and the positions of the threading holes (8) correspond to the current transformer (3).

6. A three-phase through-core current transformer according to claim 1, characterized in that: Two groups of wire insertion slots (9) are fixedly mounted on the upper surface of the upper shell (2), and three groups of wire connection holes (10) are equidistantly provided on the left side of the upper shell (2).

7. A three-phase through-type current transformer according to claim 1, characterized in that: Two groups of positioning holes (11) are equidistantly provided at the right edge of the lower shell (1); the edge of the lower shell (1) is rounded; and a handle (12) is fixedly connected to the upper surface of the upper shell (2).

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