Backwashing system for double-water internal-cooling phase modifier

Abstract

A backwashing system for a double-water internal-cooling phase modifier comprises a first main pipe and a second main pipe. The double-water internal-cooling phase modifier backwashing system has the advantages that dirt such as incrustation accumulated in the system is effectively removed, abnormal pressure difference caused by dirt accumulation is avoided, and therefore the efficiency and stability of a cooling system are improved, and it is ensured that a phase modifier can continuously and stably operate. The system has a forward flushing mode and a reverse flushing mode, the cleaning requirements under different conditions are met, high-temperature cleaning water in the recycling water tank is cooled through the heat exchanger and then flows back to the cleaning water tank, energy consumption is reduced, meanwhile, circulation of the cleaning water is achieved, and meanwhile, due to introduction of the reverse flushing energy storage device, the energy consumption is reduced. The pressure energy of the cleaning water can be stored and utilized before back flushing, and the water pressure of the cleaning water is increased in the subsequent back flushing process, so that the flushing effect on scale in the pipeline is effectively improved, and unplanned shutdown caused by abnormal pressure difference is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of phase regulator stator cooling systems, in particular to a double-water internally cooled phase regulator backwashing system. Background Art

[0002] Phase regulator is a device used for circuit control, mainly used to adjust the phase difference between voltage and current in AC circuits, and plays an irreplaceable role in power factor correction, power quality improvement, and power system stability improvement. In order to ensure the normal use of phase regulators, they need to be regularly maintained and serviced. Among them, cooling the phase regulator is an important measure to ensure its stable operation. Usually, water circulation is used as a medium to remove the heat inside the phase regulator. During long-term heat exchange, scale and other dirt are easily accumulated in the water circulation pipe. The traditional one-way circulation cooling structure will cause the problem of excessive inlet and outlet water pressure difference. In severe cases, it may even cause the phase regulator to shut down unplanned, affecting the normal use of the phase regulator. Summary of the invention

[0003] The purpose of the present invention is to provide a double-water internally cooled phase shifter backwashing system, which can perform online backwashing of the cooling circulation pipeline during the operation of the phase shifter, remove internal scale and other dirt, avoid abnormal pressure difference, and solve the problems in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a double water internally cooled phase shifter backwashing system includes a first main pipe and a second main pipe, one end of the first main pipe is connected to a cleaning water tank, the other end of the first main pipe is equipped with a first branch pipe and a second branch pipe connected to each other, one end of the second main pipe is connected to a recovery water tank, and the other end of the second main pipe is equipped with a third branch pipe and a fourth branch pipe connected to each other, wherein a connected heat exchanger is installed between the cleaning water tank and the recovery water tank, and the cleaning water with a higher temperature in the recovery water tank can be cooled and returned to the cleaning water tank by the heat exchanger, the first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe are all connected to the cooling pipe of the phase shifter stator, and a first bypass pipe and a second bypass pipe connected to each other are also connected between the first main pipe and the second main pipe, a first switch valve is installed on the first bypass pipe, a second switch valve is installed on the second bypass pipe, a third switch valve is installed on the first main pipe between the first bypass pipe and the second bypass pipe, and a fourth switch valve is installed on the second main pipe between the first bypass pipe and the second bypass pipe, and the first switch valve and the second switch valve are closed. When the third switch valve and the fourth switch valve are opened, the cleaning water with lower temperature can enter the cooling pipe of the phase shifter stator through the first branch pipe and the second branch pipe respectively for forward flushing and cooling. When the first switch valve and the second switch valve are opened and the third switch valve and the fourth switch valve are closed, the cleaning water with lower temperature can enter the cooling pipe of the phase shifter stator through the third branch pipe and the fourth branch pipe respectively for reverse flushing and cooling. A backwashing energy storage device is also installed on the second main pipe near the third branch pipe and the fourth branch pipe. The backwashing energy storage device includes a pressure-bearing shell, an elastic water bag connected to the second main pipe is installed in the pressure-bearing shell, a pressure plate is installed on one side of the elastic water bag, a spring is provided between the pressure plate and the pressure-bearing shell, and the spring always has a tendency to push the pressure plate to compress the elastic water bag. A fifth switch valve is also installed on the second main pipe between the backwashing energy storage device and the third branch pipe and the fourth branch pipe. Before the first switch valve and the second switch valve are opened and the third switch valve and the fourth switch valve are closed for reverse flushing, closing the fifth switch valve allows the cleaning water to be stored in the elastic water bag and expand to overcome the elastic force of the spring. The backwashing energy storage device also includes a connecting shell that can be detachably mounted on the second main pipe. A first folded edge is provided on one side of the connecting shell close to the pressure-bearing shell, and a second folded edge that matches the first folded edge is provided on the pressure-bearing shell. The first folded edge and the second folded edge are provided with matching through holes, and connecting bolts are installed in the through holes. A detachable partition is installed in the pressure-bearing shell, and the elastic water bag is located between the partition and the pressure plate. Two holes are provided on the partition, and the water inlet pipe and the water outlet pipe of the elastic water bag are respectively connected to the second main pipe through the holes. A guide block is installed on the pressure plate, and a guide groove that matches the guide block is provided in the shell wall of the pressure-bearing shell. A proximity switch is installed on the pressure-bearing shell, and the proximity switch is connected to the fifth switch valve through a control circuit. When the elastic water bag stores water and expands to push the pressure plate to contact the proximity switch, the proximity switch can send a control signal to the fifth switch valve to control it to open.The first branch pipe, the second branch pipe, the third branch pipe, and the fourth branch pipe are respectively installed with a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor at one end close to the stator cooling pipe of the phase regulator. The first pressure sensor, the second pressure sensor, the third pressure sensor, and the fourth pressure sensor are all connected to the control device, and the control device is connected to the first switch valve, the second switch valve is closed, the third switch valve, and the fourth switch valve through a control line. The recovery water tank is equipped with a double filtering mechanism, which includes a detachable large-particle filter box, the end of the second main pipe is located in the large-particle filter box, the outer periphery of the large-particle filter box is provided with a first filter screen, a turbo fan is installed on the side wall of the recovery water tank corresponding to one side of the large-particle filter box, a heat exchange water inlet pipe is installed at the bottom of the recovery water tank below the turbo fan, a second filter screen is installed on the heat exchange water inlet pipe, the filter hole diameter of the second filter screen is smaller than the filter hole diameter of the first filter screen, an arc baffle is installed at the bottom of the recovery water tank away from the heat exchange water inlet pipe, the large-particle filter box can intercept large-diameter scale dirt, and the small-diameter scale dirt can enter the space on one side of the arc baffle away from the heat exchange water inlet pipe under the action of the turbo fan after being separated from the large-particle filter box. Corresponding to the position of the arc baffle, a sewage cleaning port is also opened at the bottom of the recovery water tank, the filter hole diameter of the first filter screen is 4-8mm, and the filter hole diameter of the second filter screen is 1-3mm. A liquid level sensor is installed in the recovery water tank, and a water replenishment pump is also provided on the recovery water tank. When the liquid level sensor detects that the liquid level is lower than the turbofan, a signal can be sent to the water replenishment pump to start replenishing water. The elastic water bag is made of a high-strength, wear-resistant synthetic rubber material.

[0005] The positive effect of the present invention is that the backwashing system of the double water internal cooling phase shifter described in the present invention includes a first main pipe and a second main pipe, the first main pipe is equipped with a first branch pipe and a second branch pipe connected to each other, the second main pipe is equipped with a third branch pipe and a fourth branch pipe connected to each other, and a cleaning water tank, a recovery water tank and a heat exchanger forming a circulation passage, and a bypass pipe is also installed between the two groups of main pipes. By setting the opening and closing of four groups of valves, the forward and reverse flushing of the phase shifter can be achieved. The online reverse flushing of the cooling circulation pipeline during the operation of the phase shifter effectively removes the scale and other dirt accumulated inside, avoids the pressure difference abnormality caused by the accumulation of dirt, thereby improving the efficiency and stability of the cooling system, and ensuring that the phase shifter can operate continuously and stably. The system has two modes of forward and reverse flushing. Through the flexible control of the switch valve, the flushing direction can be easily switched to meet the cleaning needs in different situations. This design not only improves the cleaning effect, but also increases the adaptability and flexibility of the system. The heat exchanger is used to cool the high-temperature cleaning water in the recovery water tank and then return it to the cleaning water tank, which reduces energy consumption and realizes the circulation of cleaning water. At the same time, the introduction of the backwashing energy storage device can store and utilize the pressure energy of the cleaning water before backwashing, and increase the water pressure of the cleaning water during the subsequent backwashing process, thereby effectively improving the flushing effect of scale in the pipeline and avoiding unplanned shutdowns caused by abnormal pressure differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of a backwash energy storage device; Figure 3 It is a connection diagram of the connection shell and the pressure shell; Figure 4 yes Figure 2 An enlarged view of the AA section view; Figure 5 It is a schematic diagram of the structure of a double filtering mechanism arranged in a recycling water tank; Figure 6 It is a schematic diagram showing the direction of water flow when the present invention performs forward flushing; Figure 7 It is a schematic diagram showing the direction of water flow when the present invention performs back flushing. DETAILED DESCRIPTION

[0007] The double water internal cooling phase regulator backwashing system described in the present invention is as follows: Figure 1 As shown, it includes a first main pipe 1 and a second main pipe 2, one end of the first main pipe 1 is connected to a cleaning water tank 3, the other end of the first main pipe 1 is installed with a first branch pipe 4 and a second branch pipe 5 connected to each other, one end of the second main pipe 2 is connected to a recovery water tank 6, and the other end of the second main pipe 2 is installed with a third branch pipe 7 and a fourth branch pipe 8 connected to each other.

[0008] The cleaning water tank 3 can provide cleaning water with a relatively low temperature. After the cleaning water is heated by heat exchange with the phase shifter stator, it is collected and enters the recovery water tank 6. A heat exchanger 9 is installed between the cleaning water tank 3 and the recovery water tank 6. The cleaning water with a relatively high temperature in the recovery water tank 6 can be cooled by the heat exchanger 9 and flow back to the cleaning water tank 3 to realize the circulation of the cleaning water.

[0009] The first branch pipe 4, the second branch pipe 5, the third branch pipe 7 and the fourth branch pipe 8 are all connected to the cooling pipe of the phase shifter stator. When the stator is cleaned in the forward direction, the cleaning water with a lower temperature enters the cooling pipe of the stator from the first branch pipe 4 and the second branch pipe 5. When the stator is cleaned in the reverse direction, the cleaning water with a lower temperature enters the cooling pipe of the stator from the third branch pipe 7 and the fourth branch pipe 8.

[0010] In order to realize the reversing cleaning of the condenser stator, a first bypass pipe 10 and a second bypass pipe 11 are connected between the first main pipe 1 and the second main pipe 2, a first switch valve 12 is installed on the first bypass pipe 10, and a second switch valve 13 is installed on the second bypass pipe 11. A third switch valve 14 is installed on the first main pipe 1 between the first bypass pipe 10 and the second bypass pipe 11, and a fourth switch valve 15 is installed on the second main pipe 2 between the first bypass pipe 10 and the second bypass pipe 11.

[0011] like Figure 6 As shown, when the first switch valve 12 and the second switch valve 13 are closed, and the third switch valve 14 and the fourth switch valve 15 are opened, the cleaning water with a lower temperature can enter the cooling pipe of the phase-shifting stator through the first branch pipe 4 and the second branch pipe 5 respectively for forward flushing and cooling. The flow path of the cleaning water is through the first main pipe 1, flows through the third switch valve 14, enters the first branch pipe 4 and the second branch pipe 5 respectively, and then enters the cooling pipe of the phase-shifting stator. After heat exchange and temperature rise, it is respectively connected to the second main pipe 2 through the third branch pipe 7 and the fourth branch pipe 8, and flows through the fourth switch valve 15 and finally enters the recovery water tank 6.

[0012] like Figure 7As shown, when the first switch valve 12 and the second switch valve 13 are opened, and the third switch valve 14 and the fourth switch valve 15 are closed, the cleaning water with a lower temperature can enter the cooling pipe of the phase-shifting stator through the third branch pipe 7 and the fourth branch pipe 8 respectively for reverse flushing and cooling, so as to solve the problem of large pressure difference between the inlet and outlet water of the forward flushing caused by blockage. The flow path of the cleaning water is to enter the first bypass pipe 10 through the first main pipe 1, flow through the first switch valve 12, enter the third branch pipe 7 and the fourth branch pipe 8 respectively, and then enter the cooling pipe of the phase-shifting stator. After heat exchange and temperature rise, it is respectively connected to the second bypass pipe 11 through the first branch pipe 4 and the second branch pipe 5, and finally enters the recovery water tank 6 through the fourth switch valve 15.

[0013] Furthermore, a backwash energy storage device can be installed on the second main pipe 2 near the third branch pipe 7 and the fourth branch pipe 8. The backwash energy storage device will not play a role when the phase shifter stator is forward flushed. It can store energy for the cleaning water before reverse flushing. When reverse flushing, it can increase the flow rate and water pressure of the cleaning water, thereby improving the flushing and cleaning effect of scale and other dirt inside the pipeline.

[0014] like Figure 2 As shown, the backwashing energy storage device includes a pressure-bearing shell 16, in which an elastic water bag 17 connected to the second main pipe 2 is installed, and a pressure plate 18 is installed on one side of the elastic water bag 17. A spring 19 is provided between the pressure plate 18 and the pressure-bearing shell 16, and the spring 19 always has a tendency to push the pressure plate 18 to compress the elastic water bag 17. Through the expansion of the elastic water bag 17, a certain amount of cleaning water can be accumulated inside, and at the same time, the elastic potential energy is stored by squeezing the pressure plate 18 to overcome the elastic force of the spring 19, so as to increase the flow rate and water pressure during backwashing.

[0015] A fifth switch valve 20 is also installed on the second main pipe 2 between the backwash energy storage device and the third branch pipe 7 and the fourth branch pipe 8. When forward flushing is performed, the fifth switch valve 20 is always in an open state, and the elastic water bag 17 only serves as a channel for the washing water to pass through. It itself will not compress or expand, and will not interfere with the normal forward cleaning of the stator.

[0016] When the scale and other dirt inside the pipe cause blockage, resulting in excessive pressure difference between the inlet and outlet water during forward flushing, and the pipe cannot work normally, before the first switch valve 12 and the second switch valve 13 are opened, and the third switch valve 14 and the fourth switch valve 15 are closed for reverse flushing, the fifth switch valve 20 is closed to allow the elastic water bag 17 to store cleaning water and expand against the elastic force of the spring 19, thereby storing potential energy. After the elastic water bag 17 stores a sufficient amount of cleaning water and potential energy, the fifth switch valve 20 is opened, and the pressure released by the elastic water bag 17 can be used to increase the flow rate and water pressure of reverse flushing, remove the scale and other dirt inside, and thus improve the reverse flushing effect of the condenser stator.

[0017] Furthermore, in order to facilitate the installation of the backwashing energy storage device on the pipeline, the backwashing energy storage device may also include a connecting shell 21 detachably mounted on the second main pipe 2, such as Figure 3 As shown, a first folded edge 22 is provided on one side of the connecting shell 21 close to the pressure-bearing shell 16, and a second folded edge 23 matching the first folded edge 22 is provided on the pressure-bearing shell 16. The first folded edge 22 and the second folded edge 23 are provided with matching through holes, and connecting bolts 24 are installed in the through holes. The use of the connecting bolts 24 can improve the connection strength between the pressure-bearing shell 16 and the connecting shell 21, so that the pressure-bearing shell 16 can be used as a pressure-bearing container to wrap the expanded elastic water bag 17. At the same time, the above-mentioned detachable structure also facilitates the maintenance and replacement of the backwashing energy storage device.

[0018] Furthermore, in order to achieve the installation limit of the elastic water bag 17, a detachable partition 25 can be installed in the pressure-bearing shell 16, and the elastic water bag 17 is located between the partition 25 and the pressure plate 18. Two holes are opened on the partition 25, and the water inlet pipe and the water outlet pipe of the elastic water bag 17 pass through the holes and are connected to the second main pipe 2. The design of the partition 25 makes the installation of the elastic water bag 17 more stable, and also facilitates the inspection or replacement of the elastic water bag 17.

[0019] During the expansion or contraction of the elastic water bag 17, the pressure plate 18 is pushed to overcome the elastic force of the spring 19 and move back and forth. In order to ensure the stability of the pressure plate 18 during the movement, Figure 4 As shown, a guide block 26 may be installed on the pressure plate 18, and a guide groove 27 matching with the guide block 26 is provided in the shell wall of the pressure shell 16. The cooperation between the guide block 26 and the guide groove 27 can ensure the stability of the pressure plate 18 during movement, avoid its deviation or jamming, and ensure that the elastic water bag 17 can be squeezed according to the established moving track, so that the high-flow cleaning water can be backwashed into the stator cooling pipe to wash out the scale and other dirt inside.

[0020] Before back flushing, closing the fifth switch valve 20 can store the cleaning water in the elastic water bag 17 and accumulate potential energy. In order to open the fifth switch valve 20 in time after the elastic water bag 17 is filled with cleaning water and reaches the specified energy storage volume, and avoid excessive cleaning water stored in the elastic water bag 17 and causing structural damage, a proximity switch 28 can also be installed on the pressure shell 16, and the proximity switch 28 is connected to the fifth switch valve 20 through a control line.

[0021] When the elastic water bag 17 expands and pushes the pressure plate 18 to contact the proximity switch 28, the proximity switch 28 can send a control signal to the fifth switch valve 20 to control the opening. The above automatic control design can ensure that after the elastic water bag 17 stores water with sufficient pressure, the fifth switch valve 20 is opened in time for reverse flushing, thereby improving the flushing efficiency.

[0022] In order to realize the automatic switching of forward and reverse flushing of the phase shifter stator cooling pipeline, the first branch pipe 4, the second branch pipe 5, the third branch pipe 7, and the fourth branch pipe 8 are respectively installed with a first pressure sensor 29, a second pressure sensor 30, a third pressure sensor 31, and a fourth pressure sensor 32 at one end close to the phase shifter stator cooling pipeline. The above-mentioned first pressure sensor 29, the second pressure sensor 30, the third pressure sensor 31, and the fourth pressure sensor 32 are all connected to the control device, and the control device is connected to the first switch valve 12, the second switch valve 13 is closed, and the third switch valve 14 and the fourth switch valve 15 through the control line.

[0023] When the pressure difference between the first pressure sensor 29, the second pressure sensor 30 and the third pressure sensor 31, the fourth pressure sensor 32 is within the normal range, it means that there is no blockage in the stator cooling pipe, and normal forward flushing heat exchange can be performed. Once the pressure difference exceeds the set range, the surface pipe is blocked, and the corresponding switch valve needs to be controlled to open and close to achieve reverse flushing and cleaning. By real-time monitoring of the pressure changes in each branch pipe, the control device can automatically adjust the opening and closing state of the switch valve to ensure the smooth progress of the flushing process.

[0024] Furthermore, in order to collect and process the scale and other dirt in the recovery water tank 6, the dirt is minimized from re-entering the circulation of the cleaning water. Figure 5 As shown, a double filtering mechanism can be installed in the recovery water tank 6, and the double filtering mechanism includes a detachable large-particle filter box 33, the end of the second main pipe 2 is located in the large-particle filter box 33, and a first filter screen 34 is provided on the periphery of the large-particle filter box 33 to intercept scale dirt with a larger diameter. The large-particle filter box 33 can be disassembled relative to the recovery water tank 6 to facilitate cleaning of the dirt inside.

[0025] Corresponding to the side position of the large-particle filter box 33, a turbofan 35 is installed on the side wall of the recovery water tank 6, and a heat exchange water inlet pipe 36 is installed at the bottom of the recovery water tank 6 under the turbofan 35. The heat exchange water inlet pipe 36 is connected to the heat exchanger 9. A second filter screen 37 is installed on the heat exchange water inlet pipe 36. The filter hole diameter of the second filter screen 37 is smaller than the filter hole diameter of the first filter screen 34, which is used to achieve secondary filtration of dirt in the cleaning water.

[0026] An arc-shaped baffle plate 38 is installed at the bottom of the recovery water tank 6 far away from the heat exchange water inlet pipe 36. The large-diameter filter box 33 can retain the scale dirt with a larger diameter. After the scale dirt with a smaller diameter is separated from the large-diameter filter box 33, it can enter the space on the side of the arc-shaped baffle plate 38 far away from the heat exchange water inlet pipe 36 under the action of the turbofan 35. The arc-shaped baffle plate 38 acts as a barrier to minimize the entry of the small-diameter dirt into the heat exchange water inlet pipe 36. This double filtering mechanism design can more effectively remove dirt in the recovered water, ensuring the normal operation of the heat exchanger 9 and the recycling of the cleaning water.

[0027] Furthermore, in order to facilitate the cleaning of accumulated dirt in the recovery water tank 6, a sewage cleaning port 39 can be opened at the bottom of the recovery water tank 6 corresponding to the position of the arc-shaped baffle 38. The sewage cleaning port 39 and the heat exchange water inlet pipe 36 are respectively located on both sides of the arc-shaped baffle 38. After the cooling cycle is stopped, the sewage cleaning port 39 is opened to facilitate regular cleaning of accumulated dirt.

[0028] Furthermore, the pore diameter of the first filter screen 34 may be 4-8 mm, and the pore diameter of the second filter screen 37 may be 1-3 mm. The above design can perform graded filtration according to the size of the dirt, thereby improving the filtration efficiency.

[0029] Furthermore, in order to realize timely water replenishment in the recovery water tank 6 and ensure that the turbine fan 35 plays a corresponding diversion role when it is below the liquid level, a liquid level sensor 40 can be installed in the recovery water tank 6, and a water replenishment pump 41 is also provided on the recovery water tank 6. When the liquid level sensor 40 detects that the liquid level is lower than the turbine fan 35, it can send a signal to the water replenishment pump 41 to start water replenishment. The above-mentioned automatic water replenishment design can ensure that the water level in the recovery water tank 6 is always maintained within a suitable range, ensure the stable operation of the backwash system, and avoid affecting the normal operation of the system cooling cycle.

[0030] In order to ensure the expansion and contraction performance of the elastic water bag 17, the elastic water bag 17 can be made of a high-strength, wear-resistant synthetic rubber material to ensure that it can still maintain good sealing and durability under long-term pressure and frequent expansion and contraction to meet the needs of long-term use.

[0031] The double-water internally cooled phase-shifting backwashing system of the present invention also has the following advantages: Easy maintenance and care: The backwash energy storage device adopts a detachable design, which is convenient for inspection and replacement of elastic water bag 17 and other parts, reducing the difficulty and cost of maintenance. In addition, the design of the double filtering mechanism effectively intercepts dirt of different particle sizes, protects the internal parts of the system from damage, and prolongs the service life.

[0032] Intelligent control: The intelligent operation of the system is realized by connecting pressure sensors, proximity switches and other sensors, and linking control with control devices, switch valves and other components. It can monitor key parameters such as pipeline pressure and elastic water bag 17 status in real time, and automatically adjust the flushing mode and switch valve status according to actual conditions, thus improving the automation level and operation efficiency of the system.

[0033] Improve safety and reliability: The system uses an elastic water bag 17 made of high-strength, wear-resistant synthetic rubber material, as well as multiple filtering and protection measures to ensure the safety and reliability of the system. Even in harsh working environments, it can maintain stable operating performance, providing a strong guarantee for the stable operation of the phase regulator.

[0034] In summary, the double-water internally cooled phase-shifting machine backwashing system described in the present invention can realize forward and reverse flushing of the phase-shifting machine by setting the opening and closing of four sets of valves, effectively removing the scale and other dirt accumulated inside, avoiding the pressure difference abnormality caused by the accumulation of dirt, and thus improving the efficiency and stability of the cooling system. At the same time, the system has designs such as automatic control and dual filtering mechanisms, which further improves the reliability and practicality of the system. It not only improves the cooling efficiency and stability, and enhances the flexibility of the system, but also achieves multiple positive effects such as energy saving and consumption reduction, easy maintenance and maintenance, intelligent control, and improved safety and reliability, providing strong support for the long-term stable operation of the phase-shifting machine.

[0035] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A double water internal cooling phase regulator backwashing system, characterized by: The invention comprises a first main pipe (1) and a second main pipe (2), one end of the first main pipe (1) is connected to a cleaning water tank (3), the other end of the first main pipe (1) is provided with a first branch pipe (4) and a second branch pipe (5) connected to each other, one end of the second main pipe (2) is connected to a recovery water tank (6), the other end of the second main pipe (2) is provided with a third branch pipe (7) and a fourth branch pipe (8) connected to each other, wherein a heat exchanger (9) is provided between the cleaning water tank (3) and the recovery water tank (6), the cleaning water with a higher temperature in the recovery water tank (6) can be cooled by the heat exchanger (9) and flow back to the cleaning water tank (3), the first branch pipe (4), the second branch pipe (5), the third branch pipe (7) and the fourth branch pipe (8) 8) are both connected to the cooling pipe of the phase shifter stator, a first bypass pipe (10) and a second bypass pipe (11) are connected between the first main pipe (1) and the second main pipe (2), a first switch valve (12) is installed on the first bypass pipe (10), a second switch valve (13) is installed on the second bypass pipe (11), a third switch valve (14) is installed on the first main pipe (1) between the first bypass pipe (10) and the second bypass pipe (11), a fourth switch valve (15) is installed on the second main pipe (2) between the first bypass pipe (10) and the second bypass pipe (11), the first switch valve (12) and the second switch valve (13) are closed, and the third switch valve (14) and the fourth switch valve are closed. When the first switch valve (12) and the second switch valve (13) are opened and the third switch valve (14) and the fourth switch valve (15) are closed, the cleaning water with a lower temperature can enter the cooling pipe of the phase shifter stator through the third branch pipe (7) and the fourth branch pipe (8) respectively to perform reverse flushing and cooling. A backwashing energy storage device is also installed on the second main pipe (2) near the third branch pipe (7) and the fourth branch pipe (8). The backwashing energy storage device includes a pressure-bearing shell (16). The pressure-bearing shell (16) is equipped with a pressure-bearing shell (16) and a pressure-bearing shell (16) connected to the second main pipe (2 ) is connected to an elastic water bag (17), a pressure plate (18) is installed on one side of the elastic water bag (17), a spring (19) is provided between the pressure plate (18) and the pressure-bearing shell (16), and the spring (19) always has a tendency to push the pressure plate (18) to compress the elastic water bag (17). A fifth switch valve (20) is also installed on the second main pipe (2) between the backwashing energy storage device and the third branch pipe (7) and the fourth branch pipe (8). Before the first switch valve (12) and the second switch valve (13) are opened and the third switch valve (14) and the fourth switch valve (15) are closed for backwashing, the closing of the fifth switch valve (20) allows the elastic water bag (17) to store cleaning water and expand to overcome the elastic force of the spring (19).

2. A double water internally cooled phase regulator backwashing system according to claim 1, characterized in that: The backwashing energy storage device further comprises a connecting shell (21) detachably mounted on the second main pipe (2); a first folded edge (22) is provided on a side of the connecting shell (21) close to the pressure-bearing shell (16); a second folded edge (23) matching with the first folded edge (22) is provided on the pressure-bearing shell (16); the first folded edge (22) and the second folded edge (23) are provided with matching through holes, and connecting bolts (24) are installed in the through holes.

3. A double water internally cooled phase regulator backwashing system according to claim 2, characterized in that: A detachable partition (25) is installed in the pressure-bearing shell (16). The elastic water bag (17) is located between the partition (25) and the pressure plate (18). Two holes are opened on the partition (25). The water inlet pipe and the water outlet pipe of the elastic water bag (17) pass through the holes and are connected to the second main pipe (2).

4. A double water internally cooled phase regulator backwashing system according to claim 1, characterized in that: A guide block (26) is mounted on the pressure plate (18), and a guide groove (27) matching with the guide block (26) is provided in the shell wall of the pressure-bearing shell (16).

5. The double water internal cooling phase regulator backwashing system according to claim 1 is characterized by: A proximity switch (28) is mounted on the pressure-bearing housing (16), and the proximity switch (28) is connected to the fifth switch valve (20) via a control line. When the elastic water bag (17) stores water and expands to push the pressure plate (18) into contact with the proximity switch (28), the proximity switch (28) can send a control signal to the fifth switch valve (20) to control opening.

6. A double water internally cooled phase regulator backwashing system according to claim 1, characterized in that: A first pressure sensor (29), a second pressure sensor (30), a third pressure sensor (31) and a fourth pressure sensor (32) are respectively installed at one end of the first branch pipe (4), the second branch pipe (5), the third branch pipe (7) and the fourth branch pipe (8) close to the phase shifter stator cooling pipe. The first pressure sensor (29), the second pressure sensor (30), the third pressure sensor (31) and the fourth pressure sensor (32) are all connected to a control device. The control device is connected to the first switch valve (12), the second switch valve (13) is closed, and the third switch valve (14) and the fourth switch valve (15) are connected through a control line.

7. The double water internal cooling phase regulator backwashing system according to claim 1 is characterized by: A double filtering mechanism is installed in the recovery water tank (6), and the double filtering mechanism includes a detachable large-particle filter box (33). The end of the second main pipe (2) is located in the large-particle filter box (33). A first filter screen (34) is provided on the outer periphery of the large-particle filter box (33). A turbine fan (35) is installed on the side wall of the recovery water tank (6) at a position corresponding to one side of the large-particle filter box (33). A heat exchange water inlet pipe (36) is installed at the bottom of the recovery water tank (6) below the turbine fan (35). The heat exchange water inlet pipe (36) ) is installed with a second filter screen (37), the filter hole diameter of the second filter screen (37) is smaller than the filter hole diameter of the first filter screen (34), and an arc-shaped baffle (38) is installed at the bottom of the recovery water tank (6) away from the heat exchange water inlet pipe (36), so that the large-particle filter box (33) can intercept scale dirt with a larger diameter, and the scale dirt with a smaller diameter can enter the space on the side of the arc-shaped baffle (38) away from the heat exchange water inlet pipe (36) under the action of the turbofan (35) after being separated from the large-particle filter box (33).

8. A double water internally cooled phase regulator backwashing system according to claim 7, characterized in that: A sewage cleaning port (39) is also provided at the bottom of the recovery water tank (6) at a position corresponding to the arc-shaped baffle (38). The filter holes of the first filter screen (34) have a diameter of 4-8 mm, and the filter holes of the second filter screen (37) have a diameter of 1-3 mm.

9. The double water internally cooled phase regulator backwashing system according to claim 7, characterized in that: A liquid level sensor (40) is installed in the recovery water tank (6), and a water replenishment pump (41) is also provided on the recovery water tank (6). When the liquid level sensor (40) detects that the liquid level is lower than the turbofan (35), a signal is sent to the water replenishment pump (41) to start replenishing water.

10. The double water internally cooled phase regulator backwashing system according to claim 1, characterized in that: The elastic water bag (17) is made of a high-strength, wear-resistant synthetic rubber material.

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