A water-cooled transformer for photovoltaic power generation

Abstract

The present invention provides a water-cooled transformer for photovoltaic power generation, which includes a water-cooling component and a transformer body, an oil pump and a heat dissipation component that are connected in sequence. There are multiple heat dissipation components and water-cooling components, which correspond to each other one by one. The conventional fin plate heat dissipation method is improved. The heat flow driven by the oil cooler flows through the water-cooling component through the heat dissipation pipe, thereby realizing the heat dissipation function. At the same time, multiple heat dissipation pipes are provided, and the multiple heat dissipation pipes are wrapped by a heat conduction pipe. Compared with a single thick heat dissipation pipe, the contact area between the heat dissipation pipe and the cooling water is increased, the heat dissipation efficiency is improved, and the heat dissipation pipe is protected by the heat conduction pipe, effectively reducing the possibility of the cooling water seeping into the transformer body due to the breakage of the heat dissipation pipe.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a water-cooled transformer for photovoltaic power generation. Background Art

[0002] A power transformer is a static electrical device that is used to convert an AC voltage (current) of a certain value into another or several voltages (currents) of different values ​​with the same frequency. A power transformer is generally a static device with two or more windings. In order to transmit electrical energy, it converts the AC voltage and current of one system into the voltage and current of another system at the same frequency through electromagnetic induction. Usually, the values ​​of these currents and voltages are different.

[0003] Due to the existence of iron loss and copper loss, the transformer will continuously generate heat during operation, which will affect the normal operation of the traction transformer. In order to ensure the normal operation of the transformer, a transformer oil cooler is generally installed on the transformer. The transformer oil cooler can take away the heat generated by the transformer during operation and stabilize the temperature of all components within a reasonable temperature range, thereby ensuring the normal operation of the transformer.

[0004] In the prior art, transformers use air-cooled coolers to help the transformer oil cooler dissipate heat. Compared with water cooling, air cooling has low heat transfer efficiency and large volume. Water-cooled oil cooling has the characteristics of high heat transfer efficiency and compact structure. However, water is conductive. In earthquake-prone areas or harsh working conditions, once the water cooling pipe is damaged, the cooling liquid may flow into the transformer, which may easily cause a safety accident. Summary of the invention

[0005] The main purpose of the present invention is to provide a water-cooled photovoltaic power generation transformer, aiming to solve the problem of insufficient safety performance of existing water-cooled transformers;

[0006] To achieve the above object, the technical solution proposed by the present invention is: a water-cooled photovoltaic power generation transformer, comprising a water-cooling component and a transformer body, an oil pump and a heat dissipation component connected in sequence, wherein the heat dissipation component and the water-cooling component are both multiple and correspond to each other;

[0007] The heat dissipation component includes a heat dissipation pipe, an upper assembly box and a lower assembly box. There are multiple heat dissipation pipes, and the multiple heat dissipation pipes are arranged between the upper assembly box and the lower assembly box. One end of the heat dissipation pipe is connected to the upper assembly box, and the other end of the heat dissipation pipe is connected to the lower assembly box.

[0008] The water cooling component includes a heat conducting pipe, a cooling water tank and a driving assembly, wherein the heat conducting pipe wraps the heat dissipation pipe, one end of the heat conducting pipe abuts the upper assembly box, and the other end of the heat conducting pipe abuts the lower assembly box, the cooling water tank is used to accommodate the heat conducting pipe and the heat dissipation component, the cooling water tank is formed with a water outlet and a water inlet, the height of the water inlet is lower than the height of the water outlet, and the driving assembly is used to drive the cooling water to flow from the water inlet to the water outlet;

[0009] The upper assembly box passes through the cooling water tank through a pipeline and is connected to the oil pump, the oil pump is connected to the transformer body, and the lower assembly box passes through the cooling water tank through a pipeline and is connected to the transformer body.

[0010] Preferably, the heat-conducting pipe comprises a tube shell and a contact block, the tube shell is arranged on the outside of the heat-dissipating pipe, one side of the contact block abuts against the inner wall of the tube shell, and the side of the contact block facing away from the tube shell abuts against the outer wall of the heat-dissipating pipe, the heat-conducting pipe and the heat-dissipating pipe are enclosed to form a sealed cavity, and the sealed cavity is filled with heat-conducting liquid.

[0011] Preferably, the cooling water tank includes a first box body and a second box body, the heat dissipation component and the heat dissipation pipe are both accommodated in the first box body, the second box body is arranged on the upper part of the side wall of the first box body, and the second box body is connected to the first box body, the lower part of the side wall of the first box body forms the water inlet, and the side wall of the second box body forms the water outlet.

[0012] Preferably, a switch door is formed on the side of the first box body facing away from the second box body, the bottom of the switch door is hinged to the bottom plate of the first box body, the water inlet is arranged on the switch door, the cooling water tank also includes a control component and a door panel drive mechanism, a pressure sensor is installed in the sealed cavity, the pressure sensor is electrically connected to the control component, and the door panel drive mechanism is connected to the switch door.

[0013] Preferably, a heat dissipation silicone grease layer is further provided between the contact block and the heat dissipation pipe.

[0014] Preferably, the door panel driving mechanism includes a battery, a linear electric cylinder, a connecting rod and a hinge block, the battery is electrically connected to the linear electric cylinder, the linear electric cylinder is electrically connected to the control component, the linear electric cylinder is fixedly connected to the bottom plate of the first box body, the telescopic rod of the linear electric cylinder is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the switch door, the hinge block is fixedly connected to the side wall of the bottom plate of the first box body, and the hinge block is hinged to the middle part of the connecting rod; the linear electric cylinder is used to drive the switch door to rotate.

[0015] Preferably, the drive assembly includes a water inlet drive assembly and a water outlet drive assembly, the water inlet drive assembly and the water outlet drive assembly are electrically connected to the control assembly respectively, the water inlet drive assembly is communicated with the water inlet, the water outlet drive assembly is communicated with the water outlet, and a liquid level sensor is further provided in the second box body, and the liquid level sensor is electrically connected to the control assembly.

[0016] Preferably, a sealing layer is further provided on the side of the switch door facing the interior of the first box body.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the technical solution of the present invention, the conventional fin plate heat dissipation method is improved, and the heat flow driven by the oil cooler is passed through the water-cooled component through the heat dissipation pipe, thereby realizing the heat dissipation function. At the same time, a plurality of heat dissipation pipes are arranged, and the plurality of heat dissipation pipes are wrapped by the heat conductive pipe. Compared with a single thick heat dissipation pipe, the contact area between the heat dissipation pipe and the cooling water is increased, the heat dissipation efficiency is improved, and the heat dissipation pipe is protected by the heat conductive pipe, which effectively prevents the heat dissipation pipe from being damaged and causing the possibility of cooling water infiltration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of a water-cooled photovoltaic power generation transformer proposed by the present invention;

[0021] Figure 2 This is a schematic structural diagram of the coordination of a water-cooling component and a heat dissipation component of a water-cooled photovoltaic power generation transformer proposed by the present invention;

[0022] Figure 3 Figure 1 The enlarged view of point A in the middle;

[0023] Figure 4 The present invention provides a schematic diagram of the internal cross-sectional structure of the cooperation between the heat dissipation pipe and the heat conduction pipe of a water-cooled photovoltaic power generation transformer.

[0024] Description of Figure Numbers:

[0025]

[0026]

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The invention provides a water-cooled photovoltaic power generation transformer.

[0034] Please refer to Figures 1 to 4A water-cooled photovoltaic power generation transformer is proposed, including a water-cooling component 4 and a transformer body 1, an oil pump 2 and a heat dissipation component 3 connected in sequence, wherein there are multiple heat dissipation components 3 and water-cooling components 4 and they correspond one to one.

[0035] The heat dissipation component 3 includes a heat dissipation pipe 5, an upper assembly box 6 and a lower assembly box 7. There are multiple heat dissipation pipes 5, and the multiple heat dissipation pipes 5 are arranged between the upper assembly box 6 and the lower assembly box 7. One end of the heat dissipation pipe 5 is connected to the upper assembly box 6, and the other end of the heat dissipation pipe 5 is connected to the lower assembly box 7.

[0036] The water cooling component 4 includes a heat pipe 8, a cooling water tank 9 and a driving assembly 10. The heat pipe 8 wraps the heat dissipation pipe 5. One end of the heat pipe 8 abuts the upper collecting box 6, and the other end of the heat pipe 8 abuts the lower collecting box 7. The cooling water tank 9 is used to accommodate the heat pipe 8 and the heat dissipation component 3. The cooling water tank 9 is formed with a water outlet 12 and a water inlet 11. The height of the water inlet 11 is lower than the height of the water outlet 12. The driving assembly 10 is used to drive the cooling water to flow from the water inlet 11 to the water outlet 12.

[0037] The upper assembly box 6 passes through the cooling water tank 9 through a pipeline and is connected to the oil pump 2 , the oil pump 2 is connected to the transformer body 1 , and the lower assembly box 7 passes through the cooling water tank 9 through a pipeline and is connected to the transformer body 1 .

[0038] The conventional fin heat dissipation method is improved, and the heat flow driven by the oil cooler flows through the water-cooled component 4 through the heat dissipation pipe 5, thereby realizing the heat dissipation function. At the same time, a plurality of heat dissipation pipes 5 are arranged, and the plurality of heat dissipation pipes 5 are wrapped by the heat conduction pipe 8. Compared with a single thick heat dissipation pipe 5, the contact area between the heat dissipation pipe 5 and the cooling water is increased, the heat dissipation efficiency is improved, and the heat dissipation pipe 5 is protected by the heat conduction pipe 8, which effectively reduces the possibility of the heat dissipation pipe 5 being damaged and causing the cooling water to penetrate into the transformer body 1.

[0039] Compared with allowing the cooling water to directly contact the radiator pipes, the use of an isolation method can greatly increase safety.

[0040] Furthermore, the heat pipe 8 is a copper structural part, and the flow direction of the heat dissipation oil in the heat dissipation pipe 5 is from the upper collecting box 6 to the lower collecting box 7. The flow direction of the heat dissipation oil is opposite to the flow direction of the cooling water in the cooling water tank 9, thereby utilizing the countercurrent effect to increase the heat dissipation effect.

[0041] Furthermore, each transformer body 1 is provided with three heat dissipation components 3 and water cooling components 4 .

[0042] Specifically, the parallel countercurrent flow of two fluids in a heat exchange device is called "countercurrent"; under the conditions that the properties, flow rates, inlet and outlet temperatures and heat exchange areas of the cold and hot fluids are the same, the countercurrent arrangement has the largest average temperature difference between the cold and hot fluids; the greater the average temperature difference, the greater the heat transfer amount and the better the heat exchange effect; for the same amount of heat transferred, the required heat transfer area can be reduced.

[0043] Preferably, the heat-conducting pipe 8 includes a tube shell 13 and a contact block 14, the tube shell 13 is arranged on the outside of the heat-dissipating pipe 5, one side of the contact block 14 abuts against the inner wall of the tube shell 13, and the side of the contact block 14 facing away from the tube shell 13 abuts against the outer wall of the heat-dissipating pipe 5, the heat-conducting pipe 8 and the heat-dissipating pipe 5 are enclosed to form a sealed cavity, and the sealed cavity is filled with a heat-conducting liquid.

[0044] Specifically, the contact block 14 is used to improve the heat transfer efficiency as much as possible through direct contact. At the same time, the annular tube shell 13 can also increase the contact area between the heat transfer liquid and the heat dissipation tube 5, thereby improving the heat dissipation efficiency.

[0045] Preferably, the cooling water tank 9 includes a first box body 15 and a second box body 16, the heat dissipation component 3 and the heat dissipation pipe 5 are both accommodated in the first box body 15, the second box body 16 is arranged on the upper part of the side wall of the first box body 15, and the second box body 16 is connected to the first box body 15, the lower part of the side wall of the first box body 15 forms the water inlet 11, and the side wall of the second box body 16 forms the water outlet 12.

[0046] Furthermore, a side of the first box body 15 facing away from the second box body 16 faces the transformer body 1 , and a lower portion of a side wall of the second box body 16 facing away from the first box body 15 forms the water inlet 11 .

[0047] Preferably, a switch door 17 is formed on the side of the first box body 15 facing away from the second box body 16, and the bottom of the switch door 17 is hinged to the bottom plate of the first box body 15. The water inlet 12 is arranged on the switch door 17. The cooling water tank 9 also includes a control component and a door panel drive mechanism. A pressure sensor is installed in the sealed cavity, and the pressure sensor is electrically connected to the control component. The door panel drive mechanism 10 is connected to the switch door 17.

[0048] Specifically, the pressure sensor is used to detect whether the pressure in the sealed cavity is within a preset range. When the sealed cavity is damaged, the heat transfer fluid in the sealed cavity flows out. At this time, the pressure in the sealed cavity will decrease. When the pressure in the sealed cavity decreases to a preset value, the pressure sensor sends a first electrical signal to the control component. The control component controls the door panel drive mechanism 10 to open the switch door 17 according to the first electrical signal, thereby allowing the cooling water in the first box body 15 and the second box body 16 to flow out, preventing the cooling water from entering the interior of the transformer body 1.

[0049] Preferably, a heat dissipation silicone grease layer is further provided between the contact block 14 and the heat dissipation pipe 5. Specifically, the provision of the heat dissipation silicone grease layer helps to improve the heat diffusion efficiency of the heat dissipation pipe 5, thereby improving the heat dissipation effect.

[0050] Preferably, the door panel driving mechanism includes a battery, a linear electric cylinder 18, a connecting rod 19 and a hinge block 20, the battery is electrically connected to the linear electric cylinder 18, the linear electric cylinder 18 is electrically connected to the control component, the linear electric cylinder 18 is fixedly connected to the bottom plate of the first box body 15, the telescopic rod of the linear electric cylinder 18 is hinged to one end of the connecting rod 19, the other end of the connecting rod 19 is hinged to the switch door 17, the hinge block 20 is fixedly connected to the side wall of the bottom plate of the first box body 15, and the hinge block 20 is hinged to the middle part of the connecting rod 19; the linear electric cylinder 18 is used to drive the switch door 17 to rotate.

[0051] Furthermore, when the control component receives the first electrical signal, the control component controls the telescopic rod of the linear electric cylinder 18 to retract according to the first electrical signal, thereby pulling the connecting rod 19, so that the connecting rod 19 rotates a certain angle around the hinge block 20, thereby opening the switch door 17 to allow the internal cooling water to flow out and prevent the cooling water from seeping into the interior of the transformer body 1.

[0052] Preferably, the drive assembly 10 includes a water inlet drive assembly and a water outlet drive assembly, the water inlet drive assembly and the water outlet drive assembly are electrically connected to the control assembly respectively, the water inlet drive assembly is connected to the water inlet 11, and the water outlet drive assembly is connected to the water outlet 12 through a pipeline, and a liquid level sensor is also provided in the second box body 16, and the liquid level sensor is electrically connected to the control assembly.

[0053] Specifically, the water inlet 11 is provided with a filter, which can effectively prevent sand and other foreign matter from entering the cooling water tank 9, and prevent it from colliding with the heat pipe 8 driven by the cooling water, thereby causing damage to the heat pipe 8. At the same time, such an arrangement also enables the water-cooled photovoltaic power generation transformer to be directly cooled by river water.

[0054] When the water inlet drive component is turned on, the water inlet drive component injects cooling water into the cooling water tank 9, so that the water level in the cooling water tank 9 gradually increases. When the water level in the cooling water tank 9 exceeds the preset water level of the liquid level sensor, the liquid level sensor sends a second electrical signal to the control component, and the control component controls the water outlet drive component to turn on according to the second electrical signal.

[0055] The water outlet drive assembly includes a water outlet pump 21 and a suction cup 22, the water outlet pump 21 is connected to the water outlet 12 through a pipeline, the suction cup 22 is arranged inside the second box body 16, the suction cup 22 includes a connecting part and a suction part, the connecting part is connected to the water outlet 12, the suction part is perpendicular to the connecting part, and the suction part is connected to an end of the connecting part away from the water outlet 12, the lowest point of the suction part is lower than the preset water level of the liquid level sensor, and a vent is also provided on the upper part of the side wall of the second box body 16.

[0056] After the water outlet drive assembly is turned on, cooling water is continuously pumped out from the second box body 16, thereby driving the flow of cooling water.

[0057] Furthermore, when the control component receives the first electrical signal, the control component controls the water entry drive component to stop working according to the first electrical signal.

[0058] When the water level in the cooling water tank 9 is lower than the preset water level of the liquid level sensor, the liquid level sensor sends a third electrical signal to the control component, and the control component controls the water entry drive component to stop moving.

[0059] Preferably, a sealing layer is further provided on the side of the switch door 17 facing the inside of the first box body 15. Specifically, the addition of the sealing layer can increase the sealing effect of the switch door 17 to ensure the sealing performance of the cooling water tank 9 during normal operation.

[0060] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water-cooled photovoltaic power generation transformer, It is characterized in that It includes a water cooling component and a transformer body, an oil pump and a heat dissipation component which are connected in sequence, wherein there are multiple heat dissipation components and water cooling components and they correspond one to one; The heat dissipation component includes a heat dissipation pipe, an upper assembly box and a lower assembly box. There are multiple heat dissipation pipes, and the multiple heat dissipation pipes are arranged between the upper assembly box and the lower assembly box. One end of the heat dissipation pipe is connected to the upper assembly box, and the other end of the heat dissipation pipe is connected to the lower assembly box. The water cooling component includes a heat conducting pipe, a cooling water tank and a driving assembly, wherein the heat conducting pipe wraps the heat dissipation pipe, one end of the heat conducting pipe abuts the upper assembly box, and the other end of the heat conducting pipe abuts the lower assembly box, the cooling water tank is used to accommodate the heat conducting pipe and the heat dissipation component, the cooling water tank is formed with a water outlet and a water inlet, the height of the water inlet is lower than the height of the water outlet, and the driving assembly is used to drive the cooling water to flow from the water inlet to the water outlet; The upper assembly box passes through the cooling water tank through a pipeline and is connected to the oil pump, the oil pump is connected to the transformer body, and the lower assembly box passes through the cooling water tank through a pipeline and is connected to the transformer body; The heat-conducting pipe includes a tube shell and a contact block. The tube shell is arranged on the outside of the heat-dissipating pipe, one side of the contact block abuts against the inner wall of the tube shell, and the side of the contact block facing away from the tube shell abuts against the outer wall of the heat-dissipating pipe. The heat-conducting pipe and the heat-dissipating pipe are enclosed to form a sealed cavity, and the sealed cavity is filled with a heat-conducting liquid.

2. A water-cooled photovoltaic power generation transformer according to claim 1, It is characterized in that The cooling water tank includes a first box body and a second box body, the heat dissipation component and the heat dissipation pipe are both accommodated in the first box body, the second box body is arranged on the upper part of the side wall of the first box body, and the second box body is connected to the first box body, the lower part of the side wall of the first box body forms the water inlet, and the side wall of the second box body forms the water outlet.

3. A water-cooled photovoltaic power generation transformer according to claim 2, It is characterized in that A switch door is formed on the side of the first box body facing away from the second box body, the bottom of the switch door is hinged to the bottom plate of the first box body, the water inlet is arranged on the switch door, the cooling water tank also includes a control component and a door panel drive mechanism, a pressure sensor is installed in the sealed cavity, the pressure sensor is electrically connected to the control component, and the door panel drive mechanism is connected to the switch door.

4. A water-cooled photovoltaic power generation transformer according to claim 1, It is characterized in that A heat dissipation silicone grease layer is also provided between the contact block and the heat dissipation pipe.

5. A water-cooled photovoltaic power generation transformer according to claim 3, It is characterized in that The door panel driving mechanism includes a battery, a linear electric cylinder, a connecting rod and a hinge block. The battery is electrically connected to the linear electric cylinder, the linear electric cylinder is electrically connected to the control component, the linear electric cylinder is fixedly connected to the bottom plate of the first box body, the telescopic rod of the linear electric cylinder is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the door for opening and closing, the hinge block is fixedly connected to the side wall of the bottom plate of the first box body, and the hinge block is hinged to the middle of the connecting rod; the linear electric cylinder is used to drive the door for opening and closing to rotate.

6. A water-cooled photovoltaic power generation transformer according to claim 3, characterized in that the driving component includes a water inlet driving component and a water outlet driving component. The water inlet driving component and the water outlet driving component are respectively electrically connected to the control component. The water inlet driving component is communicated with the water inlet, the water outlet driving component is communicated with the water outlet, and a liquid level sensor is further arranged in the second box body. The liquid level sensor is electrically connected to the control component.

7. A water-cooled photovoltaic power generation transformer according to claim 3, characterized in that a sealing layer is further arranged on one side of the door for opening and closing facing the inside of the first box body.

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