High-voltage current transformer with error measurement function

Abstract

The utility model belongs to the field of current transformers, particularly relates to a high-voltage current transformer with an error measurement function, and provides the following scheme aiming at the problems that the existing current transformer emits heat during working, the measurement accuracy is influenced if the heat cannot be dissipated, and the practicability is poorer, the high-voltage current transformer comprises a transformer body, a water storage tank is fixed to the lower surface of the mutual inductor body, a heat dissipation mechanism used for conducting heat dissipation on the mutual inductor is installed in the water storage tank, and an adjusting mechanism used for adjusting the height of the mutual inductor is fixed to the lower surface of the water storage tank; the heat dissipation mechanism comprises a delivery pump, the delivery pump is fixed in the water storage tank through bolts, cooling water stored in the water storage tank is pumped out by the delivery pump, conveyed into the heat dissipation piece through the delivery pipe and then flows into the flowing cavity through the heat dissipation pipe, heat dissipation is further conducted on a test winding in the mutual inductor body, and the heat dissipation efficiency is improved. And thus, the influence of overheating in the mutual inductor body on the test effect is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a high-voltage current transformer, in particular to a high-voltage current transformer with an error measurement function, belonging to the technical field of current transformers. Background Art

[0002] High-voltage current transformer is an important equipment in the power system. It is mainly used to convert high voltage and large current into low voltage and small current in proportion for use by measuring instruments and relay protection devices. It can not only transmit high-voltage and large current information to the secondary side of low voltage and small current for use by measuring instruments and relay protection devices, but also has the function of real-time monitoring and evaluation of measurement errors.

[0003] In the prior art, there is a UHV current transformer with a simplified error measurement function disclosed in announcement number CN205069359U, which includes an iron core, a primary winding N1 and a secondary winding, wherein the secondary winding includes: a test winding N2 and a test winding Nt, the primary winding N1 and the test winding N2 are wound on the iron core; the test winding Nt is evenly wound outside the test winding N2, and an insulating film is provided between the two windings. It greatly reduces the workload of the UHV current transformer test error when performing on-site error testing of the UHV current transformer, liberates manpower and material resources, and improves work efficiency; the UHV current transformer of the utility model can not only be used in on-site handover tests of UHV current transformers, but also can be used for period verification.

[0004] Although the above technical solution greatly reduces the workload of testing the error of the ultra-high voltage current transformer by performing on-site error testing of the ultra-high voltage current transformer, the current transformer generates heat during operation. If the heat cannot be dissipated, the measurement accuracy is affected, resulting in poor practicality. In view of this, a high-voltage current transformer with an error measurement function is provided to overcome the above defects. Utility Model Content

[0005] The utility model provides a high-voltage current transformer with an error measurement function to solve the problem that the current transformer generates heat during operation and the measurement accuracy is affected if the heat cannot be dissipated, resulting in poor practicality.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: a high-voltage current transformer with error measurement function, comprising a transformer body, a water storage tank is fixed on the lower surface of the transformer body, a heat dissipation mechanism for heat dissipation of the transformer is installed inside the water storage tank, and an adjustment mechanism for adjusting the height of the transformer is fixed on the lower surface of the water storage tank;

[0007] The heat dissipation mechanism includes a delivery pump, which is fixed to the inside of the water tank by bolts. The output end of the delivery pump is connected to a delivery pipe, the outer wall of the delivery pipe is connected to a heat sink, the side wall of the heat sink is installed with a heat dissipation pipe, the end of the heat dissipation pipe is connected to a flow cavity opened inside the transformer body, one side of the flow cavity is connected to a return pipe interconnected with the water tank, and a cooling mechanism for cooling the heat dissipation mechanism is installed inside the heat sink.

[0008] As a further solution of the utility model: the adjustment mechanism includes a connecting plate, two connecting plates are provided, the two connecting plates are fixed to the lower surface of the water tank, the inner walls of the two connecting plates are fixed with sliders, and the inner sides of the two connecting plates are connected to fixing seats.

[0009] As a further solution of the utility model: the outer surface of the sliding block is slidably connected with a sliding groove provided on the fixing seat, and the outer walls of the two connecting plates are both installed with fixing bolts that are abutted and connected with the sliding groove.

[0010] As a further solution of the utility model: the cooling mechanism includes a water impeller, the water impeller is arranged inside the heat sink, and the side wall of the heat sink is provided with a through hole interconnected with the heat dissipation pipe.

[0011] As a further solution of the utility model: a driving rod is fixed to the side wall of the water impeller, and a heat dissipation fan wheel is fixed to the end of the driving rod.

[0012] As a further solution of the utility model: fixing plates are fixed on both sides of the fixing seat.

[0013] As a further solution of the utility model: two fixing screws are fixed inside the fixing plate.

[0014] The beneficial effect of the utility model is that the cooling water stored in the water storage tank is used to enable the delivery pump to pump out the cooling water, deliver it to the heat sink through the delivery pipe, and then flow into the flow cavity through the heat dissipation pipe, thereby dissipating the heat of the test winding inside the transformer body, thereby effectively reducing the overheating inside the transformer body and affecting the test effect;

[0015] The beneficial effect of the utility model is that when the circulating cooling water enters the heat sink, the cooling water can drive the water impeller to rotate, and the cooling water enters multiple heat pipes through the through holes. When the water impeller rotates, it drives the transmission rod to rotate, and then drives the heat dissipation wind wheel to rotate, and the heat dissipation of the heat pipe is blown by wind, thereby reducing the heat of the cooling water and improving the subsequent heat dissipation effect of the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2It is a schematic diagram of the cross-sectional structure of the water storage tank of the utility model;

[0018] Figure 3 For this utility model Figure 1 The enlarged view of point A in the middle;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the heat sink of the utility model.

[0020] In the figure: 1. Transformer body; 2. Water storage tank; 3. Delivery pump; 31. Delivery pipe; 32. Heat sink; 33. Heat dissipation pipe; 34. Flow chamber; 4. Connecting plate; 41. Slider; 42. Slide; 43. Fixing bolt; 5. Water impeller; 51. Through hole; 52. Transmission rod; 53. Heat dissipation fan wheel; 6. Fixing seat; 7. Fixing plate; 8. Fixing screw; 9. Return pipe. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1

[0023] like Figures 1 to 4 As shown, a high-voltage current transformer with an error measurement function comprises a transformer body 1, a water storage tank 2 is fixed to the lower surface of the transformer body 1, a heat dissipation mechanism for heat dissipation of the transformer is installed inside the water storage tank 2, and an adjustment mechanism for adjusting the height of the transformer is fixed to the lower surface of the water storage tank 2;

[0024] The heat dissipation mechanism includes a delivery pump 3, which is fixed to the inside of the water tank 2 by bolts. The output end of the delivery pump 3 is connected to a delivery pipe 31, the outer wall of the delivery pipe 31 is connected to a heat sink 32, and a heat dissipation pipe 33 is installed on the side wall of the heat sink 32. The end of the heat dissipation pipe 33 is connected to a flow chamber 34 opened inside the transformer body 1, and one side of the flow chamber 34 is connected to a return pipe 9 interconnected with the water tank 2. A cooling mechanism for cooling the heat dissipation mechanism is installed inside the heat sink 32. The cooling water stored in the water tank 2 is passed through the delivery pump 3 to pump out the cooling water, which is sent to the heat sink 32 through the delivery pipe 31, and then flows into the flow chamber 34 through the heat dissipation pipe 33, thereby dissipating the heat of the test winding inside the transformer body 1, thereby effectively reducing the overheating of the transformer body 1 and affecting the test effect.

[0025] Embodiment 2

[0026] In addition to all the technical features of the first embodiment, the present embodiment further includes: the adjusting mechanism includes a connecting plate 4, two connecting plates 4 are provided, the two connecting plates 4 are both fixed to the lower surface of the water tank 2, the inner walls of the two connecting plates 4 are fixed with sliders 41, the inner sides of the two connecting plates 4 are connected to a fixing seat 6, the outer surface of the slider 41 is slidably connected with a slide groove 42 provided on the fixing seat 6, the outer walls of the two connecting plates 4 are both installed with fixing bolts 43 that are abutted against the slide groove 42, through the slider 41 provided on the connecting plate 4, with the cooperation of the slide groove 42, the transformer body 1 can be adjusted in the vertical direction, and the fixing bolt 43 is tightened so that the end of the fixing bolt 43 contacts the inner wall of the slide groove 42, thereby fixing the transformer body 1, which is convenient for using cables in different positions.

[0027] Embodiment 3

[0028] In addition to all the technical features of the first embodiment, the present embodiment further includes: a cooling mechanism includes a water impeller 5, the water impeller 5 is arranged inside the heat sink 32, the side wall of the heat sink 32 is provided with a through hole 51 interconnected with the heat dissipation pipe 33, a transmission rod 52 is fixed to the side wall of the water impeller 5, a heat dissipation fan 53 is fixed to the end of the transmission rod 52, a fixing plate 7 is fixed on both sides of the fixing seat 6, and two fixing screws 8 are fixed inside the fixing plate 7. When the circulating cooling water enters the heat sink 32, the cooling water can drive the water impeller 5 to rotate, and the cooling water enters the multiple heat dissipation pipes 33 through the through hole 51. When the water impeller 5 rotates, it drives the transmission rod 52 to rotate, and then drives the heat dissipation fan 53 to rotate, and the heat dissipation pipe 33 is cooled by wind, thereby reducing the heat of the cooling water and improving the subsequent heat dissipation effect of the transformer body 1.

[0029] Working principle: Before using the high-voltage current transformer with error measurement function, first place the transformer body 1 in a suitable position, and fix the fixing plate 7 on the fixing seat 6 with the fixing screws 8 to fix the fixing plate 7, thereby fixing the current transformer to avoid displacement. The transformer body 1 can use the internal test winding to increase the number of turns by utilizing the equal ampere-turn principle to reduce the current, and convert the large current error test into a small current. The cooling water stored in the water tank 2 is pumped out by the delivery pump 3, and is delivered to the heat sink 32 through the delivery pipe 31, and then flows into the flow cavity 34 through the heat dissipation pipe 33, thereby dissipating the heat of the test winding inside the transformer body 1, thereby effectively reducing the internal overheating of the transformer body 1 and affecting the test effect, and continuously flowing The cooling water entering the flow cavity 34, with the cooperation of the return pipe 9, allows the cooling water to flow into the water storage tank 2 again for recycling. When the circulating cooling water enters the heat sink 32, the cooling water can drive the water impeller 5 to rotate, and the cooling water enters the multiple heat pipes 33 through the through hole 51. When the water impeller 5 rotates, it drives the transmission rod 52 to rotate, and then drives the heat dissipation wind wheel 53 to rotate, and the heat dissipation of the heat pipe 33 is carried out by blowing wind to dissipate heat, thereby reducing the heat of the cooling water and improving the subsequent heat dissipation effect of the transformer body 1. Through the slider 41 set on the connecting plate 4, with the cooperation of the slide groove 42, the transformer body 1 can be adjusted in the vertical direction, and the fixing bolt 43 is tightened so that the end of the fixing bolt 43 contacts the inner wall of the slide groove 42, thereby fixing the transformer body 1, which is convenient for using cables in different positions.

[0030] 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.

[0031] 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 high voltage current transformer with an error measurement function, comprising a transformer body (1), characterized in that: A water storage tank (2) is fixed on the lower surface of the transformer body (1), a heat dissipation mechanism for dissipating heat from the transformer is installed inside the water storage tank (2), and an adjustment mechanism for adjusting the height of the transformer is fixed on the lower surface of the water storage tank (2); The heat dissipation mechanism comprises a delivery pump (3), the delivery pump (3) is fixed inside the water storage tank (2) by means of bolts, the output end of the delivery pump (3) is connected to a delivery pipe (31), the outer wall of the delivery pipe (31) is connected to a heat dissipation element (32), a heat dissipation pipe (33) is installed on the side wall of the heat dissipation element (32), the end of the heat dissipation pipe (33) is connected to a flow cavity (34) provided inside the transformer body (1), one side of the flow cavity (34) is connected to a return pipe (9) which is interconnected with the water storage tank (2), and a cooling mechanism for cooling the heat dissipation mechanism is installed inside the heat dissipation element (32).

2. A high voltage current transformer with error measurement function according to claim 1, characterized in that: The regulating mechanism comprises a connecting plate (4), two connecting plates (4) are provided, the two connecting plates (4) are both fixed to the lower surface of the water storage tank (2), the inner walls of the two connecting plates (4) are both fixed with a slider (41), and the inner sides of the two connecting plates (4) are both connected to a fixing seat (6).

3. A high voltage current transformer with error measurement function according to claim 2, characterized in that: The outer surface of the sliding block (41) is slidably connected to a sliding groove (42) provided on the fixing seat (6), and the outer walls of the two connecting plates (4) are both provided with fixing bolts (43) abutting against the sliding groove (42).

4. The high voltage current transformer with error measurement function according to claim 1, characterized in that: The cooling mechanism comprises a water impeller (5), the water impeller (5) being arranged inside the heat sink (32), and a through hole (51) communicating with the heat sink (33) is provided on the side wall of the heat sink (32).

5. A high voltage current transformer with error measurement function according to claim 4, characterized in that: A transmission rod (52) is fixed to the side wall of the water impeller (5), and a heat dissipation fan wheel (53) is fixed to the end of the transmission rod (52).

6. The high voltage current transformer with error measurement function according to claim 3, characterized in that: Fixing plates (7) are fixed on both sides of the fixing seat (6).

7. A high voltage current transformer with error measurement function according to claim 6, characterized in that: Two fixing screws (8) are fixed inside the fixing plate (7).

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