Three-phase isolation current transformer

Abstract

The utility model relates to the technical field of current transformers, in particular to a three-phase isolation current transformer which comprises a shell and a connecting plate, the outer side of the shell is fixedly connected with the connecting plate through bolts, two sets of partition plates are fixedly connected in the shell at equal intervals, and three sets of current transformers are fixedly installed in the partition plates. An auxiliary assembly is arranged on the outer side of the current transformer, a heat dissipation assembly is arranged in the shell, the auxiliary assembly comprises a connecting ring, a heat conduction pipe and fins, the connecting ring is arranged on the outer side of the current transformer, the heat conduction pipe is arranged on one side of the connecting ring, and the fins are arranged on the outer side of the heat conduction pipe. According to the current transformer, the auxiliary assembly is arranged, the connecting ring, the heat conduction pipe and the fins are used in a matched mode, integrated connection is achieved, copper materials are adopted, the heat dissipation area is enlarged, the heat dissipation effect is good, the problem of unstable performance caused by heat energy generated by a magnetic core and a coil of the current transformer is solved, and the service life of the current transformer is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a three-phase isolation 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] 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 connection 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.

[0004] Although the above patent has good protection effect, there are the following problems. When the device is operating, the heat energy generated by the magnetic core and coil of the current transformer causes unstable performance, and the heat dissipation effect will be limited, which will accelerate its overheating, may cause performance degradation or damage, and affect the service life of the current transformer. For this reason, we proposed a three-phase isolated current transformer to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a three-phase isolated current transformer to solve the problem that the heat energy generated by the magnetic core and coil of the current transformer proposed in the above background technology causes unstable performance, the heat dissipation effect is limited, and the service life of the current transformer is affected.

[0006] To achieve the above object, the utility model provides the following technical solution: a three-phase isolated current transformer, comprising a housing and a connecting plate, the outer side of the housing is fixedly connected to the connecting plate by bolts, two groups of partitions are fixedly connected at equal intervals in the housing, three groups of current transformers are fixedly installed in the partitions, an auxiliary component is arranged on the outer side of the current transformer, and a heat dissipation component is arranged in the housing;

[0007] The auxiliary component comprises a connecting ring, a heat conducting pipe and a fin. The connecting ring is arranged on the outer side of the current transformer, a heat conducting pipe is arranged on one side of the connecting ring, and a fin is arranged on the outer side of the heat conducting pipe.

[0008] Preferably, the heat dissipation assembly includes a mounting plate and a cooling fan, a mounting plate is fixedly installed in the housing on the right side of the fin, three groups of cooling fans are fixedly installed in the mounting plate, and the height of the cooling fan corresponds to the center position of the fin.

[0009] Preferably, the connecting ring is wrapped around the surface of the current transformer and connected to the current transformer, the rear end of the heat pipe is fixedly connected to the connecting ring, and the other end of the heat pipe is fixedly connected with fins equidistantly on the upper and lower sides, and the spacing between the fins is 3 mm. The connecting ring, heat pipe and fins are all made of copper.

[0010] Preferably, a first heat dissipation hole is opened on the right side surface of the housing at the rear end of the heat dissipation fan, and a second heat dissipation hole is opened equidistantly on the left side of the connecting plate, and the first heat dissipation hole corresponds to the second heat dissipation hole in position.

[0011] Preferably, a baffle is fixedly connected to the left side of the connecting plate at equal intervals between the second heat dissipation holes, and the diameter of the baffle is 3 cm.

[0012] Preferably, two groups of connection ports are fixedly connected to the front side of the connection plate, and three groups of wiring holes are opened on the upper surface of the shell.

[0013] Preferably, a positioning hole is provided at the bottom edge of the shell, and a connecting groove is provided at the right half of the shell.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model sets auxiliary components, uses connecting rings, heat pipes and fins in an integrated manner, uses copper material to expand the heat dissipation area, has good heat dissipation effect, solves the problem of unstable performance caused by the heat energy generated by the magnetic core and coil of the current transformer, and improves the service life of the current transformer.

[0016] 2. The utility model starts the cooling fan by setting a cooling component. The cooling fan discharges the hot air in the shell from the second cooling hole, takes out the heat in the fins, and ensures the cooling effect through the first cooling hole. It can effectively reduce the temperature of the current transformer, slow down its overheating, and ensure the normal use of the current transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 It is a schematic front view of the structure of the present utility model.

[0019] Figure 2 It is a schematic rear view of the structure of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the auxiliary components of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the heat dissipation component of the utility model.

[0022] Figure 5 For this utility model Figure 1 Partial schematic diagram of the middle connecting plate.

[0023] In the figure: 1. housing; 2. connecting plate; 3. partition; 4. current transformer; 5. auxiliary component; 501. connecting ring; 502. heat pipe; 503. fin; 6. heat dissipation component; 61. mounting plate; 62. cooling fan; 7. first heat dissipation hole; 8. second heat dissipation hole; 9. baffle; 10. connection port; 11. positioning hole; 12. connection groove. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-5 The utility model provides an embodiment: a three-phase isolation current transformer, comprising a housing 1 and a connecting plate 2, the outer side of the housing 1 is fixedly connected with the connecting plate 2 by bolts, two groups of partitions 3 are fixedly connected at equal intervals in the housing 1, three groups of current transformers 4 are fixedly installed in the partitions 3, an auxiliary component 5 is arranged on the outer side of the current transformer 4, and a heat dissipation component 6 is arranged in the housing 1;

[0026] The auxiliary component 5 includes a connecting ring 501, a heat pipe 502 and a fin 503. The connecting ring 501 is arranged on the outer side of the current transformer 4, the heat pipe 502 is arranged on one side of the connecting ring 501, and the fin 503 is arranged on the outer side of the heat pipe 502;

[0027] The device solves the problem of unstable performance caused by heat energy generated by the magnetic core and coil of the current transformer, and the heat dissipation effect is limited, which affects the service life of the current transformer, by providing the auxiliary component 5 and the heat dissipation component 6.

[0028] Furthermore, the heat dissipation assembly 6 includes a mounting plate 61 and a heat dissipation fan 62. The mounting plate 61 is fixedly mounted on the right side of the fin 503 in the housing 1. Three sets of heat dissipation fans 62 are fixedly mounted in the mounting plate 61. The height of the heat dissipation fan 62 corresponds to the center position of the fin 503. Figure 4 As shown, the structure is used to start the cooling fan 62 to transport external gas into the shell 1, discharge the hot air in the shell 1, cool the shell 1, ensure the heat dissipation effect, effectively reduce the temperature of the current transformer 4, reduce its overheating, and ensure the normal use of the current transformer 4.

[0029] Furthermore, the connecting ring 501 surrounds the surface of the current transformer 4 and is connected to the current transformer 4. The rear end of the heat pipe 502 is fixedly connected to the connecting ring 501. The other end of the heat pipe 502 is fixedly connected to fins 503 at equal distances on both sides. The spacing between the fins 503 is 3 mm. The connecting ring 501, the heat pipe 502 and the fins 503 are all made of copper. Figure 3 As shown, the structure is used to transfer the heat generated by the current transformer 4 during operation through the connecting ring 501, and to expand the contact area with the air through the fins 503, so as to dissipate heat quickly.

[0030] Furthermore, a first heat dissipation hole 7 is provided on the right side surface of the housing 1 at the rear end of the heat dissipation fan 62, and a second heat dissipation hole 8 is provided on the left side of the connecting plate 2 at an equal distance, and the first heat dissipation hole 7 corresponds to the second heat dissipation hole 8. Figure 2 As shown, the structure is used to facilitate the delivery of external air into the housing 1 through the first heat dissipation holes 7 , and to discharge the hot air in the housing 1 through the second heat dissipation holes 8 .

[0031] Furthermore, a baffle 9 is fixedly connected to the left side of the connecting plate 2 between the second heat dissipation holes 8 at equal intervals, and the diameter of the baffle 9 is 3 cm. Figure 5 As shown, the structure is used to reduce the entry of external dust into the housing 1 through the baffle 9, thereby affecting the heat dissipation effect and improving the service life of the device.

[0032] Furthermore, two groups of connection ports 10 are fixedly connected to the front side of the connection plate 2, and three groups of wiring holes are opened on the upper surface of the housing 1. Figure 1 As shown, the structure is used to facilitate the connection of the device with other equipment through the connection port 10 and the wiring hole.

[0033] Furthermore, a positioning hole 11 is provided at the bottom edge of the housing 1, and a connecting groove 12 is provided at the right half of the housing 1. Figure 2 As shown, the structure is used to quickly position the housing 1 through the positioning hole 11 at the bottom to facilitate installation, and to conveniently connect the current transformer 4 through the connecting groove 12.

[0034] Working principle: When used, Figure 1 and Figure 2 As shown, the device is first fixed and installed through the positioning hole 11, and then connected to the external device through the connection port 10 and the connection groove 12, as shown in FIG. Figure 3 As shown, when the current transformer 4 is in operation, heat is generated, and heat is transferred through the connecting ring 501 and the heat pipe 502, and the heat is directed to the fins 503 to dissipate heat, as shown in FIG. Figure 4 and Figure 2 As shown, the cooling fan 62 is started, and wind is generated by the rotation of the cooling fan 62 to blow air to the fins 503 to dissipate heat and cool them. The outside air is transported into the housing 1 through the first cooling hole 7, and the generated hot air is discharged through the second cooling hole 8, so that the cooling fan 62 can be operated while the cooling fan 62 is running. Figure 5 As shown, the hot air at the fin 503 is discharged from the second heat dissipation hole 8. The above is the entire working principle of the utility model.

[0035] 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 isolated current transformer, comprising a housing (1) and a connecting plate (2), characterized in that: The outer side of the housing (1) is fixedly connected to a connecting plate (2) by means of bolts, two groups of partitions (3) are fixedly connected at equal intervals inside the housing (1), three groups of current transformers (4) are fixedly installed inside the partitions (3), an auxiliary component (5) is arranged on the outer side of the current transformers (4), and a heat dissipation component (6) is arranged inside the housing (1); The auxiliary component (5) comprises a connecting ring (501), a heat conducting pipe (502) and a fin (503); the connecting ring (501) is arranged on the outside of the current transformer (4); a heat conducting pipe (502) is arranged on one side of the connecting ring (501); and a fin (503) is arranged on the outside of the heat conducting pipe (502).

2. The three-phase isolation current transformer according to claim 1, characterized in that: The heat dissipation assembly (6) comprises a mounting plate (61) and a heat dissipation fan (62); the mounting plate (61) is fixedly mounted on the right side of the fin (503) in the housing (1); three groups of heat dissipation fans (62) are fixedly mounted in the mounting plate (61); the height of the heat dissipation fan (62) corresponds to the center position of the fin (503).

3. The three-phase isolation current transformer according to claim 1, characterized in that: The connecting ring (501) surrounds the surface of the current transformer (4) and is connected to the current transformer (4); the rear end of the heat conducting tube (502) is fixedly connected to the connecting ring (501); fins (503) are fixedly connected to the other end of the heat conducting tube (502) at equal distances on both sides of the upper and lower sides; the spacing between the fins (503) is 3 mm; and the connecting ring (501), the heat conducting tube (502) and the fins (503) are all made of copper.

4. The three-phase isolation current transformer according to claim 1, characterized in that: A first heat dissipation hole (7) is provided on the right side surface of the housing (1) at the rear end of the heat dissipation fan (62), and second heat dissipation holes (8) are provided at equal intervals on the left side of the connecting plate (2), and the positions of the first heat dissipation hole (7) and the second heat dissipation hole (8) correspond to each other.

5. The three-phase isolation current transformer according to claim 1, characterized in that: A baffle (9) is fixedly connected to the left side of the connection plate (2) at an equal distance between the second heat dissipation holes (8), and the diameter of the baffle (9) is 3 cm.

6. The three-phase isolation current transformer according to claim 1, characterized in that: Two groups of connection ports (10) are fixedly connected to the front side of the connection plate (2), and three groups of wiring holes are provided on the upper surface of the housing (1).

7. The three-phase isolation current transformer according to claim 1, characterized in that: A positioning hole (11) is provided at the bottom edge of the shell (1), and a connecting groove (12) is provided at the right half of the shell (1).

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