A double-winding oil-type transformer with multiple heat dissipation circuits and its use method

Abstract

The present invention relates to the technical field of transformers, and discloses a dual-winding oil-type transformer with multiple heat dissipation circuits and a method for using the transformer. The transformer comprises an oil tank, a bracket, a radiator, a pillow box, a winding, and a delivery pipe connected between the winding and the oil tank. The pillow box stores spare cooling oil, and a secondary heat exchange pipe is fixedly installed inside the oil tank. The present invention provides a pillow box, a secondary heat exchange pipe, a dispensing assembly, and a pumping assembly. When the pumping assembly is activated, the spare cooling oil is circulated into the secondary heat exchange pipe. At this time, the heat of the winding can be removed by the cooling oil, thereby improving the heat dissipation performance and avoiding the adverse effects of excessive temperature inside the oil tank. In addition, when the cooling oil inside the oil tank ages after long-term use, the pumping assembly and the dispensing assembly are activated. While circulating the cooling oil in the oil tank, a regulator can also be injected into the oil tank, which is beneficial for regulating its pH, avoiding acidification of the cooling oil, and ensuring heat dissipation and insulation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, in particular to a double-winding oil-type transformer with multiple heat dissipation circuits and a use method thereof. Background Art

[0002] Oil-type transformers, also known as oil-immersed transformers, refer to transformers whose cooling medium is transformer insulating oil. The transformer main winding is immersed in an oil tank filled with insulating oil. They are currently widely used. Existing oil-immersed transformers mainly rely on natural or forced circulation of oil to transfer heat to the external environment. However, there are still certain deficiencies in their use: First, in some hot weather or when the transformer is heavily loaded, the existing heat dissipation performance of the transformer is insufficient, the internal oil temperature is high, which shortens the transformer life and reduces safety. Second, the insulating oil is easily oxidized under long-term high temperature to generate acidic substances, which reduces the insulation and heat dissipation performance. Summary of the Invention

[0003] In response to the deficiencies in the prior art, the present invention provides a dual-winding oil-type transformer with multiple heat dissipation circuits and a method for using the same, which has the advantages of high heat dissipation performance and improved insulating oil performance. It solves the problems of insufficient heat dissipation performance of existing transformers and the impact of oxidation of internal insulating oil on insulation and heat dissipation performance.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: a dual-winding oil-type transformer with multiple heat dissipation circuits, comprising an oil tank, a bracket, a radiator, a pillow box, a winding, and a delivery pipe connected between the winding and the oil tank, wherein spare cooling oil is stored in the pillow box, and an auxiliary heat exchange pipe is fixedly installed in the oil tank, the auxiliary heat exchange pipe surrounds the winding and both ends of the auxiliary heat exchange pipe extend to the outside of the oil tank;

[0005] A dispensing assembly is fixedly mounted on the delivery pipe, the dispensing assembly comprising a storage tank storing a regulator, and the dispensing assembly is used to inject the regulator into the delivery pipe;

[0006] A pumping assembly is installed on one side of the oil tank, and the pumping assembly is used to inject the cooling oil in the pillow box into the auxiliary heat exchange pipe. The pumping assembly is also used to circulate the cooling oil in the oil tank;

[0007] When the heat dissipation demand is large, the pumping component operates to circulate the cooling oil inside the pillow box into the auxiliary heat exchange pipe, thereby taking away the heat of the winding. When the cooling oil inside the oil tank is oxidized, the pumping component operates to circulate the cooling oil inside the oil tank. At the same time, the dosing component operates to inject the regulator into the delivery pipe, so that the regulator is mixed into the cooling oil in the oil tank, thereby regulating the pH value of the cooling oil.

[0008] Preferably, the pumping assembly includes an oil inlet pipe, an oil pump, an oil discharge pipe and a recovery pipe. The oil pump is fixed on a bracket, one end of the oil inlet pipe is fixedly connected to the bottom of the pillow box, and the other end of the oil inlet pipe is fixedly connected to the oil pump input port. A first valve is installed on the oil inlet pipe, one end of the oil discharge pipe is fixedly connected to the oil pump, and the other end of the oil discharge pipe is fixedly connected to the end of the auxiliary heat exchange pipe. The recovery pipe is provided with evenly distributed annular fins, one end of the recovery pipe is fixedly connected to the end of the auxiliary heat exchange pipe, and the other end of the recovery pipe is fixedly connected to the top of the pillow box.

[0009] Preferably, the auxiliary heat exchange tube includes a plurality of staggered S-shaped tubes and U-shaped tubes, the S-shaped tubes penetrate the center of the winding and are arranged around the winding, and the U-shaped tubes penetrate the side wall of the oil tank and are fixedly connected to the side wall of the oil tank.

[0010] Preferably, the pumping assembly further comprises a branch pipe, one end of the branch pipe is fixedly connected to the oil inlet pipe, the other end of the branch pipe is fixedly connected to the oil tank, and a second valve is installed on the branch pipe.

[0011] Preferably, a discharge pipe is fixed to the bottom end of the storage tank, the discharge pipe is fixedly connected to the conveying pipe, a ball valve is provided on the discharge pipe, a first driven gear is fixed on the valve stem of the ball valve, and a torsion spring is also installed at the connection between the valve stem of the ball valve and the discharge pipe.

[0012] Preferably, a detection component is also installed on the top of the oil tank, and the detection component is used to control the intermittent opening and closing of the ball valve. The detection component is also used to detect the pH value of the cooling oil inside the oil tank.

[0013] Preferably, the detection component includes a shell fixed on the top of the oil tank, the shell is connected to the inner cavity of the oil tank, the outer wall of the shell is fixedly connected to a motor, the motor output shaft is fixed with an incomplete gear, the incomplete gear is matched with the first driven gear, the shell is rotatably connected to an output roller, a receiving roller and a guide roller, the guide roller is located inside the oil tank and immersed in cooling oil, one end of the output roller extends to the outside of the shell and is fixed with a second driven gear, the second driven gear is matched with the incomplete gear, a base belt is wound and rolled on the output roller, one end of the base belt passes around the guide roller and is fixedly connected to the receiving roller, a vortex spring is fixedly connected between the receiving roller and the inner wall of the shell, the vortex spring is sleeved on the receiving roller, a plurality of groups of evenly distributed measuring test papers are fixedly connected to the base belt, and a transparent window is provided on the side wall of the shell, and the transparent window corresponds to the position of the base belt.

[0014] Preferably, a handle is fixed to one end of the output roller located outside the shell, and an arc-shaped groove distributed in a ring array is also opened at one end of the output roller located outside the shell. A ring is fixed on the shell, and a bayonet is inserted in the ring. One end of the bayonet is arranged on the arc surface and extends into the arc groove, and an end is fixed to the other end of the bayonet, and a reset spring is fixed between the end and the ring.

[0015] Preferably, an air bag storing rare gas is fixed on the bracket, and a first air pipe, a second air pipe and a third air pipe are fixed on the air bag. Solenoid valves are installed on the first air pipe, the second air pipe and the third air pipe. The first air pipe is fixedly connected to the pillow box, the second air pipe is fixedly connected to the oil tank, and the third air pipe is fixedly connected to the storage tank.

[0016] The present invention also discloses a method for using a double-winding oil-type transformer with multiple heat dissipation circuits, comprising: when the heat dissipation demand is large, starting the pumping component to circulate the cooling oil inside the pillow box into the auxiliary heat exchange pipe, thereby taking away the heat of the winding; when the cooling oil inside the oil tank is oxidized, starting the pumping component and the dosing component to circulate the cooling oil inside the oil tank, and injecting a regulator into the delivery pipe to mix the regulator into the circulating cooling oil, thereby regulating the pH value of the cooling oil.

[0017] Compared with the prior art, the present invention provides a dual-winding oil-type transformer with multiple heat dissipation circuits and a method for using the same, which has the following beneficial effects:

[0018] 1. This type of double-winding oil-type transformer with multiple heat dissipation circuits and its use method, by providing a pillow box, an auxiliary heat exchange pipe, a dispensing component and a pumping component, when the cooling oil in the oil tank cannot meet the heat dissipation demand, the pumping component is started to circulate the spare cooling oil to the auxiliary heat exchange pipe. At this time, the heat of the winding can be taken away by the cooling oil, thereby improving the heat dissipation performance and avoiding the adverse effects of excessive temperature inside the oil tank. In addition, when the cooling oil in the oil tank ages after long-term use, the pumping component and the dispensing component are started. While circulating the cooling oil in the oil tank, a regulator can also be injected into it, which is beneficial to regulating its pH, avoiding acidification of the cooling oil, and ensuring the heat dissipation performance and insulation performance.

[0019] 2. This type of double-winding oil-type transformer with multiple heat dissipation circuits and its use method, by providing a detection component, can control the intermittent opening of the ball valve when the motor is running, and then intermittently inject a regulator into the circulating cooling oil, so that the regulator can be more evenly mixed with the cooling oil, ensuring uniformity and avoiding excessive local alkalinity. Moreover, this small-scale and multiple adjustment method can avoid rapid changes in the pH value of the cooling oil, making it easier to control. In addition, the motor can also drive multiple measuring test papers to intermittently contact the cooling oil during the cooling oil adjustment process, and then measure the pH value of the cooling oil in real time during the adjustment process, so that the adjustment process can be controlled according to the measurement results, which is more reasonable and convenient.

[0020] 3. This double-winding oil-type transformer with multiple heat dissipation circuits and its use method are provided with a handle, so that the operator can also manually perform pH measurement while working, which is more convenient and flexible. Compared with the sensor measurement method, it has lower cost, better high temperature resistance and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional structure of a double-winding oil-type transformer with multiple heat dissipation circuits of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 2 The three-dimensional structure of a double-winding oil-type transformer with multiple heat dissipation circuits of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 For the present invention Figure 2 A magnified view of part A;

[0024] Figure 4 is a cross-sectional rendering of the fuel tank of the present invention;

[0025] Figure 5 is a schematic structural diagram of the dosage assembly of the present invention;

[0026] Figure 6 For the present invention Figure 5 A magnified view of part B;

[0027] Figure 7 It is a structural schematic diagram of the detection component of the present invention;

[0028] Figure 8 For the present invention Figure 7 Magnified view of part C;

[0029] Figure 9 It is a cross-sectional view of the housing of the present invention.

[0030] Figure: 1, oil tank; 2, bracket; 3, radiator; 4, pillow box; 5, winding; 6, delivery pipe; 7, auxiliary heat exchange pipe; 8, dispensing assembly; 81, storage tank; 82, discharge pipe; 83, ball valve; 84, first driven gear; 85, torsion spring; 9, pumping assembly; 91, oil inlet pipe; 92, oil pump; 93, oil discharge pipe; 94, recovery pipe; 95, first valve; 96, annular fin; 97, branch pipe; 98, second valve; 10, detection assembly; 101, housing ; 102. Motor; 103. Incomplete gear; 104. Output roller; 105. Receiving roller; 106. Guide roller; 107. Second driven gear; 108. Base belt; 109. Volute spring; 110. Measuring paper; 111. Transparent window; 112. Handle; 113. Arc groove; 114. Ring; 115. Pin; 116. End; 117. Return spring; 11. Air bag; 12. First air pipe; 13. Second air pipe; 14. Third air pipe. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0032] As introduced in the background technology, there are deficiencies in the existing technology. In order to solve the above technical problems, the present application proposes a double-winding oil-type transformer with multiple heat dissipation circuits and a method of using the same.

[0033] Example 1: Please refer to Figures 1-4 A double-winding oil-type transformer with multiple heat dissipation circuits includes an oil tank 1, a bracket 2, a radiator 3, a pillow box 4, a winding 5, and a delivery pipe 6 connected between the winding 5 and the oil tank 1. The pillow box 4 stores spare cooling oil. A secondary heat exchange pipe 7 is fixedly installed inside the oil tank 1. The secondary heat exchange pipe 7 surrounds the winding 5 and both ends extend to the outside of the oil tank 1.

[0034] A dispensing assembly 8 is fixedly mounted on the delivery pipe 6. The dispensing assembly 8 includes a storage tank 81 storing a regulator. The dispensing assembly 8 is used to inject the regulator into the delivery pipe 6.

[0035] A pumping assembly 9 is installed on one side of the oil tank 1. The pumping assembly 9 is used to inject the cooling oil in the pillow box 4 into the auxiliary heat exchange pipe 7. The pumping assembly 9 is also used to circulate the cooling oil in the oil tank 1;

[0036] When the heat dissipation demand is large, the pumping component 9 operates to circulate the cooling oil inside the pillow box 4 into the auxiliary heat exchange pipe 7, thereby taking away the heat of the winding 5. When the cooling oil inside the oil tank 1 is oxidized, the pumping component 9 operates to circulate the cooling oil inside the oil tank 1. At the same time, the dosing component 8 operates to inject the regulator into the delivery pipe 6, so that the regulator is mixed into the cooling oil in the oil tank 1, thereby regulating the pH value of the cooling oil.

[0037] Among them, a valve is provided on the delivery pipe 6, the winding 5 is provided with two sets of coils, the radiator 3 is provided with two groups and distributed on both sides of the oil tank 1, one end of the delivery pipe 6 is fixed to the bottom of the pillow box 4, the regulator is provided with a metal passivator or an alkaline ammonia reagent, the auxiliary heat exchange pipe 7 is provided with a copper tube, and the oil tank 1, the pillow box 4 and the storage tank 81 are all filled with nitrogen;

[0038] When in use, when the transformer is operating normally, the heat of the winding 5 is transferred to the radiator 3 by the natural circulation of the cooling oil inside the oil tank 1, and then dissipated to the outside through air cooling. When the transformer is operating under high load or in other high-temperature scenarios, the pumping component 9 is started. After the pumping component 9 is running, the spare cooling oil inside the pillow box 4 is circulated and pumped into the auxiliary heat exchange pipe 7. Since the spare cooling oil takes away the heat when passing through the auxiliary heat exchange pipe 7 and exchanges heat with the air outside the oil tank 1, the heat around the winding 5 is further reduced, which can further improve the heat dissipation performance of the transformer and meet the heat dissipation requirements under high temperature. When the cooling oil inside the oil tank 1 oxidizes and deteriorates under high-temperature environment for a long time, the pumping component 9 is started to circulate the cooling oil inside the oil tank 1, and the dosing component 8 is started at the same time. The dosing component 8 injects a regulator into the circulating cooling oil, and the regulator is mixed into the cooling oil and then the cooling oil is adjusted to a reasonable pH value.

[0039] By setting the pillow box 4, auxiliary heat exchange pipe 7, dosing component 8 and pumping component 9, when the cooling oil inside the oil tank 1 cannot meet the heat dissipation demand, the pumping component 9 is started to circulate the spare cooling oil to the auxiliary heat exchange pipe 7. At this time, the heat of the winding 5 can be taken away by the cooling oil, thereby improving the heat dissipation performance and avoiding the adverse effects of excessive temperature inside the oil tank 1. In addition, when the cooling oil inside the oil tank 1 ages after long-term use, the pumping component 9 and the dosing component 8 are started. While circulating the cooling oil in the oil tank 1, a regulator can also be injected into it, which is beneficial to regulating its pH value, avoiding acidification of the cooling oil, and ensuring the heat dissipation performance and insulation performance.

[0040] Example 2: See Figures 1-4, different from the above embodiment, the pumping assembly 9 includes an oil inlet pipe 91, an oil pump 92, an oil discharge pipe 93 and a recovery pipe 94, the oil pump 92 is fixed on the bracket 2, one end of the oil inlet pipe 91 is fixedly connected to the bottom of the pillow box 4, and the other end of the oil inlet pipe 91 is fixedly connected to the input port of the oil pump 92, a first valve 95 is installed on the oil inlet pipe 91, one end of the oil discharge pipe 93 is fixedly connected to the oil pump 92, and the other end of the oil discharge pipe 93 is fixedly connected to the end of the auxiliary heat exchange pipe 7, and the recovery pipe 94 is provided with evenly distributed annular fins 96, one end of the recovery pipe 94 is fixedly connected to the end of the auxiliary heat exchange pipe 7, and the other end of the recovery pipe 94 is fixedly connected to the top of the pillow box 4.

[0041] Among them, when the transformer is operating normally, the first valve 95 is closed. When the heat dissipation performance needs to be improved, the oil pump 92 is started and the first valve 95 is opened. The oil in the pillow box 4 enters the oil pump 92 through the oil inlet pipe 91. The oil pump 92 transports the cooling oil to the oil discharge pipe 93, and then enters the auxiliary heat exchange pipe 7, the recovery pipe 94 and the pillow box 4 in sequence, realizing the circulation of the cooling oil. When the cooling oil passes through the auxiliary heat exchange pipe 7, it takes away the heat on the auxiliary heat exchange pipe 7, and then conducts most of the heat to the annular fins 96 on the recovery pipe 94, and finally dissipates it to the outside by air cooling, thereby enhancing the heat dissipation effect of the winding 5;

[0042] By setting up a pumping component 9, the oil pump 92 can circulate the cooling oil in the pillow box 4 to the auxiliary heat exchange pipe 7, thereby realizing heat exchange, improving the heat dissipation performance of the winding 5, and helping to meet the heat dissipation requirements of the transformer under high load conditions.

[0043] Example 3, see Figure 4 , different from the above embodiment, the auxiliary heat exchange tube 7 includes a plurality of S-shaped tubes and U-shaped tubes arranged alternately, the S-shaped tube is inserted through the center of the winding 5 and arranged around the winding 5, and the U-shaped tube passes through the side wall of the oil tank 1 and is fixedly connected to the side wall of the oil tank 1.

[0044] Among them, the middle part of the S-shaped tube passes through the middle of the two winding 5 coils and surrounds the two winding 5 coils. Multiple S-shaped tubes are arranged vertically at equal intervals, and the directions of two adjacent S-shaped tubes are opposite. Setting the auxiliary heat exchange tube 7 to this shape can adapt to the double-coil structure of the winding 5, directly dissipate heat to the main part with the largest heat generation, and improve the heat dissipation efficiency.

[0045] Example 4, see Figure 3 and Figure 4, different from the above embodiment, the pumping assembly 9 also includes a branch pipe 97, one end of the branch pipe 97 is fixedly connected to the oil inlet pipe 91, and the other end of the branch pipe 97 is fixedly connected to the oil tank 1, and a second valve 98 is installed on the branch pipe 97. A discharge pipe 82 is fixed to the bottom end of the storage tank 81, and the discharge pipe 82 is fixedly connected to the delivery pipe 6. A ball valve 83 is provided on the discharge pipe 82, and a first driven gear 84 is fixed on the valve stem of the ball valve 83. A torsion spring 85 is also installed at the connection between the valve stem of the ball valve 83 and the discharge pipe 82.

[0046] The ball valve 83 is in a closed state by default, and the second valve 98 is closed in the initial state. When the pH value of the cooling oil in the oil tank 1 needs to be adjusted, the second valve 98 is opened and the first valve 95 is closed, and then the oil pump 92 is started. After the oil pump 92 is running, the cooling oil in the oil tank 1 passes through the branch pipe 97 and enters the oil pump 92, and then passes through the auxiliary heat dissipation pipe, the recovery pipe 94, the pillow box 4, and the delivery pipe 6 in sequence, and finally flows back into the oil tank 1, thereby realizing the circulation of the cooling oil. In this process, opening the ball valve 83 can allow the regulator in the storage tank 81 to be discharged into the cooling oil through the discharge pipe 82;

[0047] By setting up the pumping component 9 and the dosing component 8, it is beneficial to drive the cooling oil inside the oil tank 1 to circulate and inject the regulator into it, which is beneficial to adjust the pH value of the cooling oil and prevent the cooling oil from being oxidized and acidified and affecting the insulation performance and heat dissipation performance.

[0048] Example 5, see Figure 4-Figure 9, different from the above embodiment, a detection component 10 is further installed on the top of the oil tank 1, and the detection component 10 is used to control the intermittent opening and closing of the ball valve 83. The detection component 10 is also used to detect the pH value of the cooling oil inside the oil tank 1. The detection component 10 includes a shell 101 fixed on the top of the oil tank 1, and the shell 101 is connected to the inner cavity of the oil tank 1. The outer wall of the shell 101 is fixedly connected to a motor 102, and the output shaft of the motor 102 is fixed with an incomplete gear 103, and the incomplete gear 103 matches the first driven gear 84. The shell 101 is rotatably connected to an output roller 104, a receiving roller 105 and a guide roller 106. The guide roller 106 is located inside the oil tank 1 and Immersed in cooling oil, one end of the output roller 104 extends to the outside of the shell 101 and is fixed with a second driven gear 107, which matches the incomplete gear 103. A base belt 108 is wound and rolled on the output roller 104, and one end of the base belt 108 passes around the guide roller 106 and is fixedly connected to the receiving roller 105. A spiral spring 109 is fixedly connected between the receiving roller 105 and the inner wall of the shell 101, and the spiral spring 109 is sleeved on the receiving roller 105. A plurality of groups of evenly distributed measuring test papers 110 are fixedly connected to the base belt 108, and a transparent window 111 is provided on the side wall of the shell 101, and the transparent window 111 corresponds to the position of the base belt 108.

[0049] Among them, the volute spring 109 is in a deformed and tightened state, and the transparent window 111 is facing the part of the base belt 108 between the guide roller 106 and the receiving roller 105. When the pH value of the cooling oil is adjusted, the motor 102 is started. When the motor 102 is running, it drives the incomplete gear 103 to rotate. When the incomplete gear 103 rotates, it intermittently drives the first driven gear 84 to rotate. When the first driven gear 84 rotates, it drives the valve stem to rotate and forces the torsion spring 85 to deform. After the valve stem rotates, it opens the ball valve 83, so that the regulator in the storage tank 81 is discharged into the cooling oil. When the incomplete gear 103 is separated from the first driven gear 84, the elastic force of the torsion spring 85 forces the valve stem to reset, causing the ball valve 83 to be completely closed. Therefore, when the motor 102 drives the incomplete gear When the wheel 103 rotates continuously, coolant can be intermittently injected into the circulating cooling oil. At the same time, when the incomplete gear 103 rotates, it drives the second driven gear 107 to rotate intermittently. When the second driven gear 107 rotates, it drives the output roller 104 to rotate. When the output roller 104 rotates, the base belt 108 is lowered. At the same time, the elastic force of the spiral spring 109 drives the receiving roller 105 to rotate, so that the base belt 108 remains straight. When the measuring paper 110 on the base belt 108 moves with the base belt 108, it is first immersed in the cooling oil, then moves to the transparent window 111, and finally is wound on the receiving roller 105. The operator can observe the measuring paper 110 through the transparent window 111, and thus obtain the acidity and alkalinity of the cooling oil.

[0050] By setting up the detection component 10, when the motor 102 is running, the ball valve 83 can be controlled to open intermittently, and then the regulator can be intermittently injected into the circulating cooling oil, so that the regulator can be mixed with the cooling oil more evenly, ensuring uniformity and avoiding excessive local alkalinity. Moreover, this small amount and multiple adjustment method can avoid the pH value of the cooling oil from changing too quickly, which is convenient for control. In addition, the motor 102 can also drive multiple measuring test papers 110 to intermittently contact the cooling oil during the adjustment of the cooling oil, and then measure the pH value of the cooling oil in real time during the adjustment process, so as to control the adjustment process according to the measurement results, which is more reasonable and convenient.

[0051] Example 6, see Figure 8 , different from the above embodiment, the output roller 104 is located on the outside of the shell 101 and is fixed with a handle 112 at one end, and the output roller 104 is located on the outside of the shell 101 and is also provided with an arc-shaped groove 113 distributed in a ring array at one end, and a ring 114 is fixed on the shell 101, and a bayonet 115 is inserted in the ring 114, and one end of the bayonet 115 is set on the arc surface and extends into the arc groove 113, and the other end of the bayonet 115 is fixed with an end head 116, and a return spring 117 is fixed between the end head 116 and the ring 114.

[0052] The elastic force of the return spring 117 causes one end of the latch 115 to engage in the arc groove 113, preventing the output roller 104 from rotating at will under the elastic force of the spiral spring 109. During use, since the arc groove 113 and the end of the latch 115 are both arc surfaces, after the second driven gear 107 is driven, the second driven gear 107 rotates, and the inner wall of the arc groove 113 squeezes the latch 115, causing the latch 115 to move to the outside of the arc groove 113. Subsequently, the latch 115 is reinserted into another arc groove 113 under the elastic force of the return spring 117, that is, the latch 115 will not affect the control of the output roller 104 by the motor 102. Similarly, when the handle 112 is manually turned, the latch 115 will not affect the rotation of the output roller 104.

[0053] By setting the latch 115, the latch 115 can prevent the output roller 104 from rotating at will. By setting the handle 112, the operator can also perform pH measurement manually while working, which is more convenient and flexible. Compared with the sensor measurement method, it has lower cost, better high temperature resistance and longer service life.

[0054] Example 7, see Figure 4, different from the above embodiment, an air bag 11 storing rare gas is fixed on the bracket 2, and a first air pipe 12, a second air pipe 13 and a third air pipe 14 are fixed on the air bag 11. The first air pipe 12, the second air pipe 13 and the third air pipe 14 are all equipped with solenoid valves. The first air pipe 12 is fixedly connected to the pillow box 4, the second air pipe 13 is fixedly connected to the oil tank 1, and the third air pipe 14 is fixedly connected to the storage tank 81.

[0055] Among them, compressed nitrogen is injected into the air bag 11. In actual application, the solenoid valves on the first air pipe 12, the second air pipe 13 and the third air pipe 14 are activated respectively, which can add nitrogen to the pillow box 4, the oil tank 1 and the storage tank 81 respectively, which is beneficial to adjust the air pressure balance and protect the circuit safety.

[0056] Example 8, see Figures 1-4 A method for using a double-winding oil-type transformer with multiple heat dissipation circuits includes: when the heat dissipation demand is large, starting the pumping component 9 to circulate the cooling oil inside the pillow box 4 into the auxiliary heat exchange pipe 7, thereby taking away the heat of the winding 5; when the cooling oil inside the oil tank 1 is oxidized, starting the pumping component 9 and the dosing component 8 to circulate the cooling oil inside the oil tank 1, and injecting a regulator into the delivery pipe 6 to mix the regulator into the circulating cooling oil, thereby regulating the pH value of the cooling oil.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A double-winding oil-type transformer with multiple heat dissipation circuits, comprising an oil tank, a bracket, a radiator, a pillow box, a winding, and a delivery pipe connected between the winding and the oil tank, characterized in that: The pillow box stores spare cooling oil, and the oil tank is fixed with a secondary heat exchange pipe, which surrounds the winding and has both ends extending to the outside of the oil tank. A dispensing assembly is fixedly mounted on the delivery pipe, the dispensing assembly comprising a storage tank storing a regulator, and the dispensing assembly is used to inject the regulator into the delivery pipe; A pumping assembly is installed on one side of the oil tank, and the pumping assembly is used to inject the cooling oil in the pillow box into the auxiliary heat exchange pipe. The pumping assembly is also used to circulate the cooling oil in the oil tank; A discharge pipe is fixed to the bottom end of the storage tank, the discharge pipe is fixedly connected to the delivery pipe, a ball valve is provided on the discharge pipe, a first driven gear is fixed to the valve stem of the ball valve, and a torsion spring is also installed at the connection between the valve stem of the ball valve and the discharge pipe; The top of the oil tank is also equipped with a detection assembly, which is used to control the intermittent opening and closing of the ball valve. The detection assembly is also used to detect the pH value of the cooling oil in the oil tank. The detection assembly includes a shell fixed on the top of the oil tank, the shell is communicated with the inner cavity of the oil tank, the outer wall of the shell is fixedly connected to a motor, the output shaft of the motor is fixed with an incomplete gear, the incomplete gear is matched with the first driven gear, the shell is rotatably connected with an output roller, a receiving roller and a guide roller, the guide roller is located inside the oil tank and immersed in the cooling oil, one end of the output roller extends to the outside of the shell and is fixed with a second driven gear, the second driven gear is matched with the incomplete gear, a base belt is wound and rolled on the output roller, one end of the base belt passes around the guide roller and is fixedly connected to the receiving roller, a volute spring is fixedly connected between the receiving roller and the inner wall of the shell, the volute spring is sleeved on the receiving roller, a plurality of groups of evenly distributed measuring test papers are fixedly connected to the base belt, and a transparent window is provided on the side wall of the shell, the transparent window corresponds to the position of the base belt; When the heat dissipation demand is large, the pumping component operates to circulate the cooling oil inside the pillow box into the auxiliary heat exchange pipe, thereby taking away the heat of the winding. When the cooling oil inside the oil tank is oxidized, the pumping component operates to circulate the cooling oil inside the oil tank. At the same time, the dosing component operates to inject the regulator into the delivery pipe, so that the regulator is mixed into the cooling oil in the oil tank, thereby regulating the pH value of the cooling oil.

2. The double-winding oil-type transformer with multiple heat dissipation circuits according to claim 1, characterized in that: The pumping assembly includes an oil inlet pipe, an oil pump, an oil discharge pipe and a recovery pipe. The oil pump is fixed on a bracket, one end of the oil inlet pipe is fixedly connected to the bottom of the pillow box, and the other end of the oil inlet pipe is fixedly connected to the oil pump input port. A first valve is installed on the oil inlet pipe, one end of the oil discharge pipe is fixedly connected to the oil pump, and the other end of the oil discharge pipe is fixedly connected to the end of the auxiliary heat exchange pipe. The recovery pipe is provided with evenly distributed annular fins, one end of the recovery pipe is fixedly connected to the end of the auxiliary heat exchange pipe, and the other end of the recovery pipe is fixedly connected to the top of the pillow box.

3. The double-winding oil-type transformer with multiple heat dissipation circuits according to claim 2, characterized in that: The auxiliary heat exchange tube includes a plurality of staggered S-shaped tubes and U-shaped tubes. The S-shaped tubes penetrate the center of the winding and are arranged around the winding. The U-shaped tubes penetrate the side wall of the oil tank and are fixedly connected to the side wall of the oil tank.

4. The double-winding oil-type transformer with multiple heat dissipation circuits according to claim 2, characterized in that: The pumping assembly further comprises a branch pipe, one end of which is fixedly connected to the oil inlet pipe, and the other end of which is fixedly connected to the oil tank, and a second valve is installed on the branch pipe.

5. The double-winding oil-type transformer with multiple heat dissipation circuits according to claim 1, characterized in that: The output roller is located on the outside of the shell and is fixed with a handle at one end. The output roller is also provided with an arc groove distributed in a ring array at one end. A ring is fixed on the shell, and a bayonet is inserted in the ring. One end of the bayonet is arranged on the arc surface and extends into the arc groove. The other end of the bayonet is fixed with an end head, and a reset spring is fixed between the end head and the ring.

6. The double-winding oil-type transformer with multiple heat dissipation circuits according to claim 1, characterized in that: An air bag storing rare gas is fixed on the bracket, and a first air pipe, a second air pipe and a third air pipe are fixed on the air bag. Solenoid valves are installed on the first air pipe, the second air pipe and the third air pipe. The first air pipe is fixedly connected to the pillow box, the second air pipe is fixedly connected to the oil tank, and the third air pipe is fixedly connected to the storage tank.

7. A method for using a double-winding oil-type transformer with multiple heat dissipation circuits, characterized in that: The method for using the double-winding oil-type transformer with multiple heat dissipation circuits uses a double-winding oil-type transformer with multiple heat dissipation circuits as described in any one of claims 1-6, including: when the heat dissipation demand is large, starting the pumping component to circulate the cooling oil inside the pillow box into the auxiliary heat exchange pipe, thereby taking away the heat of the winding; when the cooling oil inside the oil tank is oxidized, starting the pumping component and the dosing component to circulate the cooling oil inside the oil tank, and injecting a regulator into the delivery pipe to mix the regulator into the circulating cooling oil, thereby regulating the pH value of the cooling oil.

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