Water-cooled transformer

Abstract

The utility model relates to a water-cooled transformer, which comprises a transformer shell, a transformer, cooling water, an electromagnetic valve, a communicating pipeline and a cooling-water machine, the transformer is arranged in the transformer shell, and the cooling water is filled between the transformer and the shell; the transformer shell is communicated with the cooling-water machine through a communicating pipeline, and the electromagnetic valve is installed on the communicating pipeline. Compared with the prior art, the transformer is directly arranged in the transformer shell filled with cooling water, the heat dissipation efficiency can be effectively improved, the service life of the transformer is prolonged, accessories such as a fan or a corrugated sheet used for heat dissipation in the conventional design can be omitted due to the design of the transformer body, and the size of the transformer is reduced; opening and closing of a communicating pipeline are controlled through an electromagnetic valve, and circulating adjustment of cooling water is facilitated; the transformer is placed in cooling water, and fire disasters cannot be caused easily; the cooling-water machine can be turned on or turned off according to the water temperature detected by the temperature sensor, and temperature control is accurate.

Description

Technical Field

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

[0002] Transformers are widely used in power and electronic systems as voltage and current conversion devices to carry the function of power transmission. In most cases, reactive power is effectively transmitted, while the active power generated by conductors such as iron cores and coil wires in transformers is converted into heat energy. As the load increases, the temperature rise of the product increases, which in severe cases will accelerate the aging of the insulation in the product and shorten the service life of the appliance. If the cooling speed is accelerated when the temperature rises, the aging of the insulation can be delayed and the service life of the transformer can be increased.

[0003] After searching, the application publication number CN112750605A discloses a water-cooled transformer, which specifically discloses: the water-cooled transformer includes: an iron core, a valve side winding, a grid side winding and a liquid cooling device; the grid side winding and the valve side winding are sequentially sleeved on the iron core from the inside to the outside; the grid side winding and the valve side winding are both wound by hollow wires, and the ends of each hollow wire are connected to the liquid cooling device through a conversion head, so that cooling water circulates between the hollow wire and the liquid cooling device; the ends of each hollow wire are connected to the output terminal through a copper flat wire to draw out current.

[0004] However, the existing patent mainly uses cooling water to circulate in the hollow wire for cooling, which has a slow cooling speed; it is mainly aimed at rectifier transformers; the coil wire is directly in contact with the cooling water, which is difficult to maintain. After long-term operation, the cooling water is prone to electrolysis and the wire is prone to corrosion. Therefore, how to design a water-cooled transformer with a fast cooling speed is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a water-cooled transformer in order to overcome the defect of slow cooling speed in the above-mentioned prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a water-cooled transformer is provided, comprising a transformer casing, a transformer, cooling water, a solenoid valve, a connecting pipe and a chiller, wherein the transformer is placed in the transformer casing, and the space between the transformer and the casing is filled with cooling water; the transformer casing and the chiller are connected through a connecting pipe, and the solenoid valve is installed on the connecting pipe.

[0008] As a preferred technical solution, there are two connecting pipelines, namely a water inlet pipeline and a water outlet pipeline.

[0009] As a preferred technical solution, the solenoid valve includes a first working position and a second working position. When the solenoid valve is in the first working position, the connecting pipeline is in an open state. When the solenoid valve is in the second working position, the connecting pipeline is in a closed state.

[0010] As a preferred technical solution, the solenoid valve is a one-way guide valve. When the solenoid valve on the water inlet pipe is in the first working position, the cooling water in the chiller flows into the transformer casing in one direction; when the solenoid valve on the water outlet pipe is in the second working position, the cooling water in the transformer casing flows into the chiller in one direction.

[0011] As a preferred technical solution, the water inlet pipeline is located above the water outlet pipeline.

[0012] As a preferred technical solution, the transformer is an insulated cast transformer.

[0013] As a preferred technical solution, the cooling water between the transformer and the casing is pure water.

[0014] As a preferred technical solution, a temperature sensor is provided in the transformer housing, a controller is provided on the chiller, and the temperature sensor is connected to the controller.

[0015] As a preferred technical solution, a drain port is provided on the transformer casing.

[0016] As a preferred technical solution, the transformer housing is a closed structure.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The utility model transformer is directly placed in a transformer casing filled with cooling water, which can effectively improve the heat dissipation efficiency and extend the service life of the transformer. The transformer body design can omit accessories such as fans or corrugated sheets used for heat dissipation in conventional designs, thereby reducing the size of the transformer;

[0019] 2) The utility model controls the opening and closing of the connecting pipeline through the solenoid valve, which is convenient for the circulation adjustment of cooling water;

[0020] 3) The utility model transformer is placed in cooling water and is not likely to cause fire;

[0021] 4) The utility model water chiller can be turned on or off according to the water temperature detected by the temperature sensor, and the temperature control is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 1 As shown in the bid number:

[0024] 1. Transformer casing, 2. Transformer, 3. Cooling water, 4. Solenoid valve, 5. Chiller, 61. Water inlet pipe, 62. Water outlet pipe. 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 part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0026] like Figure 1 As shown, the utility model provides a water-cooled transformer 2, including a transformer housing 1, a transformer 2, a solenoid valve 4, a connecting pipeline (a water inlet pipeline 61 and a water outlet pipeline 62) and a chiller 5.

[0027] The transformer housing 1 is a cubic sealed structure with a hollow interior. The transformer 2 is placed in the transformer housing 1. One side of the transformer 2 is connected to the water cooler through two connecting pipes (water inlet pipe 61 and water outlet pipe 62). A drain port is provided on the transformer housing 1, through which the cooling water 3 inside can be replaced or discharged to repair the transformer 2.

[0028] The transformer 2 is an insulating cast transformer 2.

[0029] The connecting pipeline includes a water inlet pipeline 61 and a water outlet pipeline 62. The water inlet pipeline 61 is arranged above the water outlet pipeline 62. The water inlet pipeline 61 and the water outlet pipeline 62 are both provided with a solenoid valve 4.

[0030] The solenoid valve 4 is a one-way valve. When the solenoid valve 4 on the water inlet pipeline 61 is in the first working state, the water inlet pipeline 61 is in the open state, at which time the cooling water 3 can flow from the water chiller to the transformer housing 1. When it is in the second working state, the water inlet pipeline 61 is in the closed state, at which time the cooling water 3 cannot flow. When the solenoid valve 4 on the water outlet pipeline 62 is in the first working state, the water outlet pipeline 62 is in the open state, at which time the cooling water 3 can flow from the transformer housing 1 to the water chiller. When it is in the second working state, the water outlet pipeline 62 is in the closed state, at which time the cooling water 3 cannot flow. By adjusting the solenoid valves 4 on the two pipelines, the circulating cooling of the cooling water 3 can be controlled.

[0031] A temperature sensor is provided in the transformer casing 1, and a controller is provided on the chiller 5. When the temperature sensor detects that the temperature of the cooling water 3 in the transformer casing 1 is higher than the set value, a signal is sent to the controller, and the controller controls the chiller to start working; when the temperature sensor detects that the temperature of the cooling water 3 in the transformer casing 1 is lower than the set value, a signal is sent to the controller, and the controller controls the chiller to stop working.

[0032] The cooling water 3 in the transformer housing 1 is pure water.

[0033] The utility model improves the traditional heat dissipation mode of the transformer 2, effectively reduces the size of the transformer 2 body, opens or closes the cooling system according to the heating situation, and improves the fire protection level of the product.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A water-cooled transformer, characterized in that: The invention comprises a transformer casing (1), a transformer (2), cooling water (3), an electromagnetic valve (4), a connecting pipeline and a water chiller (5); the transformer (2) is placed in the transformer casing (1), and the space between the transformer (2) and the casing is filled with cooling water (3); the transformer casing (1) and the water chiller (5) are connected via a connecting pipeline, and the electromagnetic valve (4) is installed on the connecting pipeline.

2. A water-cooled transformer according to claim 1, characterized in that: There are two connecting pipelines, namely a water inlet pipeline (61) and a water outlet pipeline (62).

3. A water-cooled transformer according to claim 2, characterized in that: The solenoid valve (4) comprises a first working position and a second working position. When the solenoid valve (4) is in the first working position, the connecting pipeline is in an open state. When the solenoid valve (4) is in the second working position, the connecting pipeline is in a closed state.

4. A water-cooled transformer according to claim 3, characterized in that: The solenoid valve (4) is a one-way guide valve. When the solenoid valve (4) on the water inlet pipeline (61) is in a first working position, the cooling water (3) in the chiller (5) flows into the transformer housing (1) in a one-way manner; when the solenoid valve (4) on the water outlet pipeline (62) is in a second working position, the cooling water (3) in the transformer housing (1) flows into the chiller (5) in a one-way manner.

5. A water-cooled transformer according to claim 2, characterized in that: The water inlet pipeline (61) is located above the water outlet pipeline (62).

6. A water-cooled transformer according to claim 1, characterized in that: The transformer (2) is an insulated cast-type transformer (2).

7. The water-cooled transformer according to claim 1, characterized in that: The cooling water (3) between the transformer (2) and the casing is pure water.

8. The water-cooled transformer according to claim 1, characterized in that: A temperature sensor is provided in the transformer housing (1), a controller is provided on the chiller (5), and the temperature sensor is connected to the controller.

9. The water-cooled transformer according to claim 1, characterized in that: The transformer casing (1) is provided with a drainage port.

10. The water-cooled transformer according to claim 1, characterized in that: The transformer casing (1) is a closed structure.

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