Generator air cooler single-tube pressing system and use method thereof

Abstract

The invention relates to the technical field of hydropower station pressurization detection, aims to solve the problems that in the prior art, pressurization is prone to misjudgment, equipment insulation is affected by water leakage, the pressurization risk is high, and the efficiency is low, and provides a generator air cooler single-pipe pressurization system and a using method thereof. The pressurizing water pump is connected with the pressurizing locking frame and the blocking locking frame; the pressing locking frame is slidably connected with a first water injection piston cylinder and a second water injection piston cylinder in the transverse direction of the pipe bearing plate, the first water injection piston cylinder and the second water injection piston cylinder are provided with first piston pipes, inserting cones are installed at the ends of the first piston pipes, and water injection through holes are formed in the inserting cones in the axial direction. The plug locking frame is in sliding connection with a first plug piston cylinder and a second plug piston cylinder in the transverse direction of the pipe bearing plate, second piston pipes are arranged in the axial direction of the first plug piston cylinder and the second plug piston cylinder, and plug cones are installed at the ends of the second piston pipes. The method has the beneficial effects that pressing is not prone to misjudgment, water leakage is not prone to occurring, equipment insulation is not affected, the pressing risk is low, and efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of hydropower station pressure testing technology, and more specifically, to a single-tube pressure testing system for a generator air cooler and its usage method. Background Technology

[0002] In large hydropower stations, the generator stator generates a large amount of heat during operation, which is usually cooled by multiple air coolers. These air coolers often use river water as the cooling medium, and copper pipes are commonly used for their water supply. However, river water has a complex composition, containing impurities, microorganisms, and corrosive substances. Copper pipes are prone to corrosion and leakage during long-term operation, which not only reduces cooling efficiency but also seriously threatens the safe operation of the generator stator.

[0003] When a leak occurs in the copper pipe of an air cooler during the high-water season, the current standard practice is to conduct a pressure test on each individual copper pipe to locate the leaking pipe, and then seal and isolate it. Specifically, one end of the copper pipe is sealed with a plug, and water is passed through the other end for pressure testing. If the pressure cannot be maintained, it is determined that the copper pipe is leaking, and both ends of it are sealed and isolated.

[0004] However, this method has obvious drawbacks: First, the pressure testing device is prone to systemic leakage, which leads to unstable test pressure and misjudgment of water leakage. Second, water leakage during the pressure testing process may come into contact with the generator stator bars and magnetic yoke tension screws, affecting their insulation performance and posing a high safety risk. Third, each air cooler has a large number of copper tubes, and pressure testing a single tube requires a lot of time and manpower, resulting in low efficiency. Summary of the Invention

[0005] The present invention aims to provide a single-tube pressure testing system for generator air coolers and its usage method, in order to solve the problems of easy misjudgment during pressure testing, water leakage affecting equipment insulation, high pressure testing risk and low pressure testing efficiency in the prior art.

[0006] The embodiments of the present invention are implemented as follows: This invention provides a single-pipe pressurization system for a generator air cooler, which includes a pressurization water pump; The outlet end of the aforementioned pressurizing water pump is connected to a pressurizing fixture and a blocking fixture. The pressurizing fixture and the blocking fixture are respectively equipped with a pressurizing locking frame and a blocking locking frame installed on the pipe plates at both ends of the air cooler. The aforementioned pressure locking frame is slidably connected along the transverse direction of the bearing plate to a first water injection piston cylinder and a second water injection piston cylinder for pressurizing water injection. Both the first water injection piston cylinder and the second water injection piston cylinder have a retractable first piston tube in the axial direction. An insertion cone is installed at the end of the first piston tube. The insertion cone has a water injection through hole communicating with the first piston tube in the axial direction. The aforementioned plugging locking frame is slidably connected to a first plugging piston cylinder and a second plugging piston cylinder for plugging along the transverse direction of the bearing plate. Both the first plugging piston cylinder and the second plugging piston cylinder have a retractable second piston tube in the axial direction, and a plug cone is installed at the end of the second piston tube.

[0007] The single-tube pressure testing system for a generator air cooler disclosed in this embodiment allows the pressure testing fixture and the plugging fixture to move on the bearing plates at both ends of the air cooler for pressure testing. Simultaneously, the insertion cone and the plug cone are inserted into both ends of the copper tube of the air cooler by the pressure testing water pump to facilitate pressure testing. As a result, the single-tube pressure testing system for a generator air cooler has the beneficial effects of being less prone to misjudgment during pressure testing, less prone to water leakage, not affecting equipment insulation, having low pressure testing risk, and high pressure testing efficiency.

[0008] Optionally: The aforementioned pressure locking frame has a first locking foot and a second locking foot that are parallel to each other and spaced apart. A first locking block and a second locking block are symmetrically distributed on opposite sides of the first locking foot and the second locking foot. A first locking screw and a second locking screw are respectively provided at the bottom of the first locking block and the second locking block. The first locking screw and the second locking screw are respectively threaded to the inner side of the bottom end of the first locking foot and the second locking foot and are perpendicular to the first locking block and the second locking block.

[0009] With this configuration, the pressure locking bracket is placed on the top support plate of the air cooler. By pressing the first and second locking blocks on the first and second locking feet against the top support plate of the air cooler, and by turning the first and second locking screws to press against the top support plate of the air cooler, the pressure locking bracket is locked.

[0010] Optionally: A first dovetail slide rail is provided between the top ends of the first locking foot and the second locking foot. The two ends of the first dovetail slide rail are respectively connected to the top ends of the first locking foot and the second locking foot by a first adjusting bolt and a second adjusting bolt. The first water injection piston cylinder and the second water injection piston cylinder are slidably connected to the first dovetail slide rail.

[0011] This configuration, with the first adjusting bolt and the second adjusting bolt at both ends of the first dovetail slide rail, facilitates precise adjustment of the position of the first dovetail slide rail and allows the insertion cone on the first piston tube to be accurately inserted into the water-filled end of the copper tube, thus improving the accuracy of the equipment.

[0012] Optionally: A first bracket is provided between the first water injection piston cylinder and the second water injection piston cylinder, and the top of the first bracket has a first water tee that connects to the pressurized water pump. The first piston tube of the first water injection piston cylinder and the second water injection piston cylinder are both connected to a pressure-holding ball valve. The end of the pressure-holding ball valve away from the first piston tube is connected to a first high-strength metal pipe. A first flexible hose is connected between the first water tee and the first high-strength metal pipe. A pressure gauge is connected to the first piston tube between the first or second water injection piston cylinder and the pressure-holding ball valve. A first branch pipe is welded onto the first high-strength metal pipe, and a first manual ball valve is provided on the first branch pipe. A first pressure-resistant pipe is connected to the end of the first branch pipe away from the first piston pipe, and the end of the first pressure-resistant pipe away from the first branch pipe is connected to the tail end of the cylinder body of the first water injection piston cylinder or the second water injection piston cylinder. The first piston tube has a first piston plate in the radial direction and a first water-blocking ring in the circumferential direction. The outer walls of the first piston plate and the first water-blocking ring are in a sealing sliding fit with the inner wall of the first water-injection piston cylinder or the second water-injection piston cylinder.

[0013] With this configuration, the connection between the first high-strength metal pipe and the first piston pipe facilitates the passage of pressurized water through the middle of the pipe. The first manual ball valve can control the water inlet of the first water injection piston cylinder or the upper chamber of the second water injection piston cylinder. Under the action of water pressure, the first piston plate and the first piston pipe generate a downward force, which enables the first piston plate to drive the insertion cone at the end of the first piston pipe into the copper pipe.

[0014] Optionally: the bottom end of the first bracket has a first dovetail groove, the first dovetail groove is slidably adapted to the first dovetail slide rail, the two sides of the first dovetail groove have a first small bracket and a second small bracket respectively, the first small bracket and the second small bracket are respectively welded to the outer wall of the first water injection piston cylinder and the second water injection piston cylinder, and both the first small bracket and the second small bracket have a first hinge.

[0015] This configuration allows the first support to slide on the first dovetail slide rail. The first and second small supports are connected to the first and second water injection piston cylinders via a first hinge, allowing the first and second water injection piston cylinders to swing around the first hinge. This facilitates flexible alignment with any copper pipe around the first dovetail slide rail, enabling the insertion cone to be inserted more flexibly into any copper pipe.

[0016] Optionally: The aforementioned blocking locking bracket has a third and a fourth locking foot that are parallel to each other and spaced apart. A third and a fourth locking block are symmetrically distributed on opposite sides of the third and fourth locking feet. A third and a fourth locking screw are respectively provided at the bottom of the third and fourth locking blocks. The third and fourth locking screws are respectively threaded to the inner side of the bottom end of the third and fourth locking feet and are perpendicular to the third and fourth locking blocks.

[0017] With this configuration, the aforementioned blocking locking bracket is placed on the bottom end of the air cooler's support plate. By pressing the third and fourth locking blocks on the third and fourth locking feet against the bottom end of the air cooler's support plate, and by turning the third and fourth locking screws and pressing them against the bottom end of the air cooler's support plate, the aforementioned blocking locking bracket is locked.

[0018] Optionally, a second dovetail slide rail is provided between the top ends of the third and fourth locking feet. The two ends of the second dovetail slide rail are respectively connected to the top ends of the third and fourth locking feet by a third adjusting bolt and a fourth adjusting bolt. The first blocking piston cylinder and the second blocking piston cylinder are slidably connected to the second dovetail slide rail.

[0019] With this configuration, the third and fourth adjusting bolts at both ends of the second dovetail slide rail facilitate fine adjustment of the position of the second dovetail slide rail, and allow the plug cone on the second piston tube to be accurately inserted into one end of the copper tube, ensuring the sealing of the copper tube.

[0020] Optionally: A second bracket is provided between the first blocking piston cylinder and the second blocking piston cylinder, and the top of the second bracket has a second water tee that connects to the pressurizing water pump; The tail end of the second piston tube of the first blocking piston cylinder and the second blocking piston cylinder is connected to a second high-strength metal pipe, and a second flexible hose is connected between the second water tee and the second high-strength metal pipe. A second branch pipe is welded radially to the second high-strength metal pipe, and a second manual ball valve is provided on the second branch pipe. A second pressure-resistant pipe is connected to the end of the second branch pipe away from the sealing cavity. The end of the second pressure-resistant pipe away from the second branch pipe is connected to the tail end of the cylinder body of the first blocking piston cylinder or the second blocking piston cylinder. The second piston tube has a second piston plate in the radial direction and a second water-blocking ring in the circumferential direction. The outer walls of the second piston plate and the second water-blocking ring are in a sealing sliding fit with the inner wall of the first blocking piston cylinder or the second blocking piston cylinder.

[0021] With this configuration, the second high-strength metal pipe is easy to pass pressurized water through the middle of the pipe, making it convenient to inject pressurized water into the second branch pipe. The first manual ball valve can control the water inlet of the first blocking piston cylinder or the upper chamber of the second blocking piston cylinder. The second piston plate and the second piston tube generate a downward force under water pressure, so that the second piston plate can drive the plug cone at the end of the second piston tube to be inserted into the copper pipe.

[0022] Optionally: the bottom end of the second bracket has a second dovetail groove, the second dovetail groove is slidably adapted to the second dovetail slide rail, the two sides of the second dovetail groove have a third small bracket and a fourth small bracket respectively, the third small bracket and the fourth small bracket are respectively welded to the outer wall of the first blocking piston cylinder and the second blocking piston cylinder, and both the third small bracket and the fourth small bracket have a second support.

[0023] This configuration allows the second bracket to slide on the second dovetail slide rail. The third and fourth small brackets are connected to the first and second blocking piston cylinders via a second hinge, allowing the first and second blocking piston cylinders to swing around the second hinge. This facilitates flexible alignment with any copper pipe around the second dovetail slide rail, enabling the plug cone to be inserted more flexibly into any copper pipe.

[0024] Optionally, a first pressure-resistant water pipe is sealed between the aforementioned pressurizing water pump and the tail end of the aforementioned first piston tube.

[0025] With this configuration, the first pressure-resistant water pipe can guide the pressurized water flow from the pressurizing water pump into the first water tee, thus providing a high-pressure water flow guiding function.

[0026] Optionally, a first return spring is provided between the inner bottom surface of the first or second water injection piston cylinder and the first piston plate, and the first return spring is sleeved on the first piston tube.

[0027] With this configuration, when the copper tube is pressurized and the inserted cone is pulled out, the first return spring can push up the first piston plate and the first piston tube, thereby pulling out the inserted cone.

[0028] Optionally: the inserted cone has a plurality of first O-rings spaced apart in the radial direction, the end of the inserted cone near the first piston tube has a first sealing cap, the first sealing cap is welded to the end of the first piston tube, the side of the first sealing cap away from the first piston tube has a first planar seal, the first planar seal is sleeved on the inserted cone and fits against the first sealing cap.

[0029] With this configuration, the aforementioned first plane seal and several aforementioned first O-ring seals ensure the sealing force at both ends of the copper pipe, and the force generated by the water pressure itself can tighten the seal to ensure no leakage.

[0030] Optionally, a second pressure-resistant water pipe is provided for a sealed connection between the aforementioned pressurizing water pump and the tail end of the aforementioned second piston tube.

[0031] With this configuration, the second pressure-resistant water pipe can guide the pressurized water flow from the pressurizing water pump into the second water tee, thus providing a high-pressure water flow guiding function.

[0032] Optionally, a second return spring is provided between the inner bottom surface of the first or second blocking piston cylinder and the second piston plate, and the second return spring is sleeved on the second piston tube.

[0033] With this configuration, when the copper tube is pressurized and the plug cone is pulled out, the second return spring can push up the second piston plate and the second piston tube, thereby pulling out the plug cone.

[0034] Optionally: the plug cone has a plurality of second O-rings spaced apart in the radial direction, the end of the plug cone near the second piston tube has a second sealing cap, the second sealing cap is welded to the end of the second piston tube, the side of the second sealing cap away from the second piston tube has a second planar seal, the second planar seal is sleeved on the insertion cone and fits against the second sealing cap.

[0035] With this configuration, the aforementioned second plane seal and several aforementioned second O-ring seals can ensure the sealing of both ends of the copper pipe. The force generated by the water pressure itself can tighten the seal and ensure no leakage.

[0036] Optionally, the pressurized water pump is equipped with the first water injection piston cylinder, the second water injection piston cylinder, the first blocking piston cylinder, and the pressure relief switch for the second blocking piston cylinder.

[0037] With this setup, once the test is complete, the pressure pump will stop pressurizing and the pressure relief switch on the pressure pump will be turned on. At this time, the high-pressure water in the first water injection piston cylinder, the second water injection piston cylinder, the first blockage piston cylinder, and the second blockage piston cylinder will flow back to the pressure pump and be collected, realizing the secondary circulation of high-pressure water.

[0038] Optionally, the bottom of the aforementioned pressure pump is equipped with several casters.

[0039] With this configuration, the aforementioned casters facilitate the movement of the pressurizing water pump, making it easier to transport the pressurizing system to the site.

[0040] In one embodiment of this invention, a method for using a single-pipe pressurization system for a generator air cooler is also provided. First, install the first and second locking feet of the pressure locking bracket onto the top support plate of the air cooler, keeping the first dovetail slide rail perpendicular to the first and second locking feet. After tightening the first and second adjusting bolts, align the insertion cone at the end of the first piston rod with one end of the copper tube of the air cooler, and tighten the first and second locking screws to lock them against the edge of the top support plate of the air cooler. The first and second water injection piston cylinders then slide along the first dovetail slide rail. Next, the third and fourth locking feet of the aforementioned plugging locking bracket are installed on the bottom support plate of the air cooler, keeping the second dovetail slide rail perpendicular to the third and fourth locking feet. After tightening the third and fourth adjusting bolts, the plug cone at the end of the second piston rod is aligned with the other end of the copper tube of the air cooler. The third and fourth locking screws are then tightened to lock the third and fourth locking screws to the edge of the bottom support plate of the air cooler. The first and second plugging piston cylinders slide along the second dovetail slide rail. Next, align the inserted cone and the plug cone with the same copper pipe. Connect the pressure testing fixture and the plugging fixture to the pressure testing water pump using the first and second pressure-resistant water pipes. Start the pressure testing water pump and open the first and second manual ball valves. One path of high-pressure water from the pressure testing water pump flows through the first pressure-resistant water pipe, the first water tee, the first flexible hose, the first high-strength metal pipe, the first branch pipe, and the first pressure-resistant pipe into the first or second water injection piston cylinder, causing pressurized water to flow through the upper chamber of the first and second water injection piston cylinders. The other path of high-pressure water from the pressure testing water pump... The water enters the first or second blocking piston cylinder through the second pressure-resistant water pipe, the second water tee, the second flexible hose, the second high-strength metal pipe, the second branch pipe, and the second pressure-resistant pipe, causing pressurized water to flow through the upper chambers of the first and second blocking piston cylinders. At this time, the first and second piston plates drive the first and second piston tubes to move downwards, thereby inserting the insertion cone and the plug cone into the two ends of the same copper pipe respectively. The first O-ring seal, the second O-ring seal, the first flat seal, and the second flat seal are pressed together under the force generated by the cylinder, thus achieving a sealing effect. Then, close the first manual ball valve and the second manual ball valve, open the pressure holding ball valve, and inject high-pressure water into the copper pipe of the air cooler through the first high-strength metal pipe, the first piston pipe and the water injection hole. When the pressure value of the pressure gauge reaches the pressure holding value, close the pressure holding ball valve. The staff observes whether the reading of the pressure gauge changes to determine whether the copper pipe of the air cooler is leaking. The pressure holding test is performed on both copper pipes at the same time each time. Finally, after completion, the pressure relief switch on the pressure pump is turned on, and the pressure holding ball valve is opened to release pressure from the copper pipe. The first manual ball valve and the second manual ball valve are opened to release pressure from the first water injection piston cylinder, the second water injection piston cylinder, the first blocking piston cylinder, and the second blocking piston cylinder. The insertion cone and the plug cone are withdrawn from the copper pipe under the action of the first return spring and the second return spring. The first water injection piston cylinder, the second water injection piston cylinder, the first blocking piston cylinder, and the second blocking piston cylinder move along the first dovetail slide rail and the second dovetail slide rail respectively to perform the next batch of copper pipe inspection. After one horizontal row of pipes has been inspected, the first clamping screw, the second clamping screw, the third clamping screw, and the fourth clamping screw are loosened. The pressure testing fixture and the blocking fixture slide vertically on the pipe plate at the top and bottom of the air cooler respectively to perform the next batch of pipe pressure resistance inspection.

[0041] In summary, the single-tube pressure testing system for generator air coolers and its usage method disclosed in this invention have the advantages of being less prone to misjudgment during pressure testing, less prone to water leakage, not affecting equipment insulation, having low pressure testing risk, and high pressure testing efficiency. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of a single-tube pressurization system for a generator air cooler according to an embodiment of the present invention; Figure 2 This is a front sectional view of the pressing tool in an embodiment of the present invention; Figure 3 This is a side sectional view of the pressing tool in an embodiment of the present invention; Figure 4 This is a front sectional view of the blocking tool in an embodiment of the present invention; Figure 5 This is a side sectional view of the blocking tool in an embodiment of the present invention.

[0044] Icons: 1-Pressure pump, 2-Pressure testing fixture, 3-Blocking fixture, 4-Air cooler, 5-Pipe plate, 6-Pressure locking bracket, 7-Blocking locking bracket, 8-First water injection piston cylinder, 9-Second water injection piston cylinder, 10-First piston tube, 11-Insertion cone, 12-Water injection through hole, 13-First blocking piston cylinder, 14-Second blocking piston cylinder, 15-Second piston tube, 16-Blocking cone, 17-First locking foot, 18-Second locking foot, 19-First locking block, 20-Second 21-First clamping screw, 22-Second clamping screw, 23-First dovetail slide rail, 24-First adjusting bolt, 25-Second adjusting bolt, 26-First bracket, 27-First water tee, 28-Pressure holding ball valve, 29-First high-strength metal pipe, 30-First hose, 31-Pressure gauge, 32-First branch pipe, 33-First manual ball valve, 34-First pressure-resistant pipe, 35-First piston plate, 36-First water-blocking ring, 37-First dovetail slide groove, 38-First small branch Frame, 39-Second small bracket, 40-First branch, 41-Third locking foot, 42-Fourth locking foot, 43-Third locking block, 44-Fourth locking block, 45-Third clamping screw, 46-Fourth clamping screw, 47-Second dovetail slide rail, 48-Third adjusting bolt, 49-Fourth adjusting bolt, 50-Second bracket, 51-Second water tee, 52-Second high-strength metal pipe, 53-Second flexible hose, 54-Second branch pipe, 55-Second manual ball valve, 56-Second pressure-resistant pipe, 5 7-Second piston plate, 58-Second water-blocking ring, 59-Second dovetail groove, 60-Third small bracket, 61-Fourth small bracket, 62-Second branch, 63-First pressure-resistant water pipe, 64-First return spring, 65-First O-ring seal, 66-First sealing cover, 67-First flat seal, 68-Second pressure-resistant water pipe, 69-Second return spring, 70-Second O-ring seal, 71-Second sealing cover, 72-Second flat seal, 73-Pressure relief switch, 74-Moving wheel. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0047] Example See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment proposes a single-pipe pressurization system for a generator air cooler 4, including a pressurization water pump 1; The outlet end of the pressurizing water pump 1 is connected to a pressurizing fixture 2 and a blocking fixture 3. The pressurizing fixture 2 and the blocking fixture 3 respectively have a pressurizing locking bracket 6 and a blocking locking bracket 7 installed on the pipe plates 5 at both ends of the air cooler 4. The pressure locking frame 6 is slidably connected to the first water injection piston cylinder 8 and the second water injection piston cylinder 9 for pressurizing water injection along the transverse direction of the bearing plate 5. The first water injection piston cylinder 8 and the second water injection piston cylinder 9 both have a retractable first piston tube 10 in the axial direction. An insertion cone 11 is installed at the end of the first piston tube 10. The insertion cone 11 has a water injection through hole 12 communicating with the first piston tube 10 in the axial direction. The blocking locking frame 7 is slidably connected to the first blocking piston cylinder 13 and the second blocking piston cylinder 14 for blocking along the transverse direction of the support plate 5. The first blocking piston cylinder 13 and the second blocking piston cylinder 14 both have a retractable second piston tube 15 in the axial direction, and a plug cone 16 is installed at the end of the second piston tube 15.

[0048] The single-tube pressure testing system for a generator air cooler 4 disclosed in this embodiment allows the pressure testing fixture 2 and the plugging fixture 3 to move on the support plates 5 at both ends of the air cooler 4 for pressure testing. At the same time, the pressure testing water pump 1 inserts the insertion cone 11 and the plug cone 16 into both ends of the copper tube of the air cooler 4 to facilitate pressure testing. As a result, the single-tube pressure testing system for a generator air cooler 4 has the beneficial effects of being less prone to misjudgment during pressure testing, less prone to water leakage, not affecting equipment insulation, low pressure testing risk, and high pressure testing efficiency.

[0049] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The pressure locking frame 6 has a first locking foot 17 and a second locking foot 18 that are parallel to each other and spaced apart. A first locking block 19 and a second locking block 20 are symmetrically distributed on opposite sides of the first locking foot 17 and the second locking foot 18. A first locking screw 21 and a second locking screw 22 are respectively provided at the bottom of the first locking block 19 and the second locking block 20. The first locking screw 21 and the second locking screw 22 are respectively threaded to the inner side of the bottom end of the first locking foot 17 and the second locking foot 18 and perpendicular to the first locking block 19 and the second locking block 20. The pressure locking frame 6 is placed on the top support plate 5 of the air cooler 4. The first locking block 19 and the second locking block 20 on the first locking foot 17 and the second locking foot 18 are pressed against the top support plate 5 of the air cooler 4. The first locking screw 21 and the second locking screw 22 are turned and pressed against the top support plate 5 of the air cooler 4 to lock the pressure locking frame 6.

[0050] A first dovetail slide rail 23 is provided between the top ends of the first locking foot 17 and the second locking foot 18. The two ends of the first dovetail slide rail 23 are connected to the top ends of the first locking foot 17 and the second locking foot 18 respectively by the first adjusting bolt 24 and the second adjusting bolt 25. The first water injection piston cylinder 8 and the second water injection piston cylinder 9 are slidably connected to the first dovetail slide rail 23. The first adjusting bolt 24 and the second adjusting bolt 25 at the two ends of the first dovetail slide rail 23 are used to facilitate fine adjustment of the position of the first dovetail slide rail 23, so that the insertion cone 11 on the first piston tube 10 can be accurately inserted into the end of the copper tube for water injection, thereby improving the accuracy of the equipment.

[0051] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A first support 26 is provided between the first water injection piston cylinder 8 and the second water injection piston cylinder 9. The top of the first support 26 has a first water passage tee 27 that connects to the pressure pump 1. The first piston tube 10 of the first water injection piston cylinder 8 and the second water injection piston cylinder 9 are both connected to a pressure holding ball valve 28. The end of the pressure holding ball valve 28 away from the first piston tube 10 is connected to a first high-strength metal pipe 29. A first hose 30 is connected between the first water tee 27 and the first high-strength metal pipe 29. A pressure gauge 31 is connected to the first piston tube 10 between the first water injection piston cylinder 8 or the second water injection piston cylinder 9 and the pressure holding ball valve 28. A first branch pipe 32 is welded onto the first high-strength metal pipe 29. The first branch pipe 32 has a first manual ball valve 33. The end of the first branch pipe 32 away from the first piston pipe 10 is connected to a first pressure-resistant pipe 34. The end of the first pressure-resistant pipe 34 away from the first branch pipe 32 is connected to the tail end of the cylinder body of the first water injection piston cylinder 8 or the second water injection piston cylinder 9. The first piston tube 10 has a first piston plate 35 in the radial direction and a first water-blocking ring 36 in the circumferential direction. The outer walls of the first piston plate 35 and the first water-blocking ring 36 are mutually sealed and slidably fitted with the inner walls of the first water-injection piston cylinder 8 or the second water-injection piston cylinder 9. The connection between the first high-strength metal pipe 29 and the first piston tube 10 facilitates the passage of pressurized water in the middle of the pipe. The first manual ball valve 33 can control the water inlet of the upper chamber of the first water-injection piston cylinder 8 or the second water-injection piston cylinder 9. The first piston plate 35 and the first piston tube 10 generate a downward force under the action of water pressure, so that the first piston plate 35 can drive the insertion cone 11 at the end of the first piston tube 10 into the copper pipe.

[0052] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the pressure-holding ball valve 28 is closed, and the pressure pump 1 injects water into the first water injection piston cylinder 8 and the second water injection piston cylinder 9 through the first water tee 27, the first hose 30, the first high-strength metal pipe 29, and the first branch pipe 32. This increases the water pressure in the first water injection piston cylinder 8 and the second water injection piston cylinder 9, causing the first piston plate 35 on the first piston tube 10 to slide, so that the insertion cone 11 at the end of the first piston tube 10 is inserted into one end of the copper pipe in the air cooler 4. Then, the pressure-holding ball valve 28 is opened, and the water inside the first high-strength metal pipe 29 is injected into the copper pipe of the air cooler 4 through the first piston tube 10. When the pressure value of the pressure gauge 31 reaches the pressure holding value, the pressure-holding ball valve 28 is closed. With the help of the plug cone 16 at the other end of the copper pipe, it is possible to observe whether the reading of the pressure gauge 31 changes, and thus determine whether the copper pipe of the air cooler 4 is leaking.

[0053] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The bottom end of the first support 26 has a first dovetail groove 37, which is slidably adapted to the first dovetail slide rail 23. The two sides of the first dovetail groove 37 have a first small support 38 and a second small support 39, respectively. The first small support 38 and the second small support 39 are respectively welded to the outer walls of the first water injection piston cylinder 8 and the second water injection piston cylinder 9. The first small support 38 and the second small support 39 each have a first hinge 40, which allows the first support 26 to slide on the first dovetail slide rail 23. The first small support 38 and the second small support 39 are connected to the first water injection piston cylinder 8 and the second water injection piston cylinder 9 through the first hinge 40, so that the first water injection piston cylinder 8 and the second water injection piston cylinder 9 can swing around the first hinge 40, which facilitates flexible alignment with any copper pipe around the first dovetail slide rail 23, and makes it easier to insert the insertion cone 11 into any copper pipe.

[0054] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The blocking locking frame 7 has a third locking foot 41 and a fourth locking foot 42 that are parallel to each other and spaced apart. A third locking block 43 and a fourth locking block 44 are symmetrically distributed on opposite sides of the third locking foot 41 and the fourth locking foot 42. The bottom of the third locking block 43 and the fourth locking block 44 are respectively provided with a third locking screw 45 and a fourth locking screw 46. The third locking screw 45 and the fourth locking screw 46 are respectively threaded to the inner side of the bottom end of the third locking foot 41 and the fourth locking foot 42 and perpendicular to the third locking block 43 and the fourth locking block 44. The blocking locking frame 7 is placed on the bottom end support plate 5 of the air cooler 4. By pressing the third locking block 43 and the fourth locking block 44 on the third locking foot 41 and the fourth locking foot 42 against the bottom end support plate 5 of the air cooler 4, the blocking locking frame 7 is locked.

[0055] A second dovetail slide rail 47 is provided between the top ends of the third locking foot 41 and the fourth locking foot 42. The two ends of the second dovetail slide rail 47 are connected to the top ends of the third locking foot 41 and the fourth locking foot 42 respectively by the third adjusting bolt 48 and the fourth adjusting bolt 49. The first blocking piston cylinder 13 and the second blocking piston cylinder 14 are slidably connected to the second dovetail slide rail 47. The third adjusting bolt 48 and the fourth adjusting bolt 49 at both ends of the second dovetail slide rail 47 are used to facilitate fine adjustment of the position of the second dovetail slide rail 47, so as to facilitate the precise insertion of the plug cone 16 on the second piston tube 15 into one end of the copper tube and ensure the sealing of the copper tube.

[0056] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A second support 50 is provided between the first blocking piston cylinder 13 and the second blocking piston cylinder 14, and the top of the second support 50 has a second water passage tee 51 that connects to the pressure pump 1. The tail end of the second piston tube 15 of the first blocking piston cylinder 13 and the second blocking piston cylinder 14 is connected to a second high-strength metal pipe 52, and a second hose 53 is connected between the second water tee 51 and the second high-strength metal pipe 52. A second branch pipe 54 is welded radially to the second high-strength metal pipe 52. The second branch pipe 54 has a second manual ball valve 55. The end of the second branch pipe 54 away from the sealing cavity is connected to a second pressure-resistant pipe 56. The end of the second pressure-resistant pipe 56 away from the second branch pipe 54 is connected to the tail end of the cylinder body of the first blocking piston cylinder 13 or the second blocking piston cylinder 14. The second piston tube 15 has a second piston plate 57 in the radial direction and a second water-blocking ring 58 in the circumferential direction. The outer walls of the second piston plate 57 and the second water-blocking ring 58 are mutually sealed and slidingly fitted with the inner walls of the first blocking piston cylinder 13 or the second blocking piston cylinder 14. The second high-strength metal tube 52 facilitates the passage of pressurized water in the middle of the tube, making it convenient to inject pressurized water into the second branch tube 54. The first manual ball valve 33 can control the water inlet of the upper chamber of the first blocking piston cylinder 13 or the second blocking piston cylinder 14. The second piston plate 57 and the second piston tube 15 generate a downward force under water pressure, so that the second piston plate 57 can drive the plug cone 16 at the end of the second piston tube 15 to be inserted into the copper tube.

[0057] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the pressurizing water pump 1 injects water into the first blocking piston cylinder 13 and the second blocking piston cylinder 14 through the second water tee 51, the second hose 53, the second high-strength metal pipe 52, and the second branch pipe 54. This increases the water pressure in the first blocking piston cylinder 13 and the second blocking piston cylinder 14, causing the second piston plate 57 on the second piston tube 15 to slide. This allows the plug cone 16 at the end of the second piston tube 15 to be inserted into one end of the copper pipe in the air cooler 4, thus completing the blocking and sealing of the other end of the copper pipe.

[0058] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The bottom end of the second bracket 50 has a second dovetail groove 59, which is slidably adapted to the second dovetail slide rail 47. The two sides of the second dovetail groove 59 have a third small bracket 60 and a fourth small bracket 61, respectively. The third small bracket 60 and the fourth small bracket 61 are respectively welded to the outer walls of the first blocking piston cylinder 13 and the second blocking piston cylinder 14. Both the third small bracket 60 and the fourth small bracket 61 have a second hinge 62. This arrangement allows the second bracket 50 to slide on the second dovetail slide rail 47. The third small bracket 60 and the fourth small bracket 61 are connected to the first blocking piston cylinder 13 and the second blocking piston cylinder 14 through the second hinge 62, so that the first blocking piston cylinder 13 and the second blocking piston cylinder 14 can swing around the second hinge 62, which facilitates flexible alignment with any copper pipe around the second dovetail slide rail 47, and makes the plug cone 16 more flexible to be inserted into any copper pipe.

[0059] A first pressure-resistant water pipe 63 is sealed between the pressure pump 1 and the tail end of the first piston tube 10. The first pressure-resistant water pipe 63 can guide the pressurized water flow from the pressure pump 1 into the first water tee 27, thus having the function of guiding high-pressure water.

[0060] A first return spring 64 is provided between the inner bottom surface of the first water injection piston cylinder 8 or the second water injection piston cylinder 9 and the first piston plate 35. The first return spring 64 is sleeved on the first piston tube 10. When the copper tube is pulled out and inserted into the cone 11 after the pressure is completed, the first return spring 64 can push up the first piston plate 35 and the first piston tube 10, and then pull out and insert into the cone 11.

[0061] The insertion cone 11 has several first O-rings 65 spaced apart in the radial direction. The end of the insertion cone 11 near the first piston tube 10 has a first sealing cap 66, which is welded to the end of the first piston tube 10. The side of the first sealing cap 66 away from the first piston tube 10 has a first flat seal 67, which is sleeved on the insertion cone 11 and fits against the first sealing cap 66. The first flat seal 67 and several first O-rings 65 ensure the sealing force at both ends of the copper tube. The force generated by the water pressure itself can compress the seal to ensure no leakage.

[0062] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A second pressure-resistant water pipe 68 is sealed between the pressure pump 1 and the tail end of the second piston tube 15. The second pressure-resistant water pipe 68 can guide the pressurized water flow from the pressure pump 1 into the second water tee 51, thus having the function of guiding high-pressure water.

[0063] A second return spring 69 is provided between the inner bottom surface of the first blocking piston cylinder 13 or the second blocking piston cylinder 14 and the second piston plate 57. The second return spring 69 is sleeved on the second piston tube 15. When the copper tube is pressed and the plug cone 16 is pulled out, the second return spring 69 can push up the second piston plate 57 and the second piston tube 15, thereby pulling out the plug cone 16.

[0064] The plug cone 16 has several second O-rings 70 distributed at intervals in the radial direction. The end of the plug cone 16 near the second piston tube 15 has a second sealing cap 71, which is welded to the end of the second piston tube 15. The side of the second sealing cap 71 away from the second piston tube 15 has a second flat seal 72, which is sleeved on the inserted cone 11 and fits against the second sealing cap 71. The second flat seal 72 and several second O-rings 70 can ensure the sealing of both ends of the copper pipe. The force generated by the water pressure itself can press the seal tightly to ensure no leakage.

[0065] The pressure pump 1 is equipped with a pressure relief switch 73 for releasing pressure from the first water injection piston cylinder 8, the second water injection piston cylinder 9, the first blocking piston cylinder 13, and the second blocking piston cylinder 14. When the test is completed, the pressure pump 1 stops pressurizing and the pressure relief switch 73 on the pressure pump 1 is opened. At this time, the high-pressure water in the first water injection piston cylinder 8, the second water injection piston cylinder 9, the first blocking piston cylinder 13, and the second blocking piston cylinder 14 will flow back to the pressure pump 1 and be collected, realizing the secondary circulation of high-pressure water.

[0066] The bottom of the pressure pump 1 is equipped with several casters 74, which facilitate the movement of the pressure pump 1 and make it easy to transport the pressure system to the site.

[0067] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the first water injection piston cylinder 8, the second water injection piston cylinder 9, the first blocking piston cylinder 13, and the second blocking piston cylinder 14 on the pressure locking frame 6 and the blocking locking frame 7 can slide along the end support plate 5 of the air cooler 4. At the same time, the first small support 38 and the second small support 39 have a first branch 40, and the third small support 60 and the fourth small support 61 have a second branch 62, which facilitates the precise positioning of the inserted cone 11 and the plug cone 16.

[0068] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the insertion cone 11 and the plug cone 16 are automatically pressed together by the action of the first piston tube 10 and the second piston tube 15 to ensure no water leakage. The two first piston tubes 10 and the two second piston tubes 15 are symmetrically arranged on the first dovetail slide rail 23 and the second dovetail slide rail 47, respectively. Water flows between the first piston tube 10 and the second piston tube 15. When the pressure fills the upper chamber of the first water injection piston cylinder 8, the second water injection piston cylinder 9, the first plug piston cylinder 13 and the second plug piston cylinder 14, the insertion cone 11 and the plug cone 16 are pressed into both ends of the copper tube and maintain a sealing effect with the copper tube.

[0069] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5In this embodiment, after each copper pipe is pressurized, the upper chamber pressure of the first water injection piston cylinder 8, the second water injection piston cylinder 9, the first blocking piston cylinder 13 and the second blocking piston cylinder 14 disappears. Under the action of the first return spring 64 and the second return spring 69, the first piston pipe 10 and the second piston pipe 15 can be easily pulled out of the insertion cone 11 and the plug cone 16 and flexibly moved to the next pipe to be pressurized.

[0070] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the insertion cone 11 and the plug cone 16 adopt a cone structure, with multiple seals on the cone. The insertion depth of the insertion cone 11 into the pipeline varies depending on the diameter of the pipe opening, effectively ensuring that the pipeline is sealed and leak-proof during pressure testing.

[0071] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the stator air cooler 4 inside the wind tunnel of the large generator unit consists of an air cooler 4 support plate 5, air cooler 4 copper pipes, and heat sinks. There are generally more than forty water-carrying copper pipes inside the air cooler 4. These copper pipes and their joints with the support plate 5 are highly susceptible to leakage defects under prolonged river water erosion and corrosion, posing a significant risk to the safe operation of the unit. To quickly address this defect, the fastest repair method is to accurately locate the leaking copper pipe, seal it with copper plugs on both ends of the support plate 5, and isolate the leaking copper pipe from operation. To eliminate water leakage in the air cooler 4 and ensure the safe operation of the generator, this invention includes a pressure pump 1, a first pressure-resistant water pipe 63, a second pressure-resistant water pipe 68, a pressure-pressurizing fixture 2, and a plugging fixture 3. The device is transported to the site, the inlet and outlet valves of the air cooler 4 are closed, residual water in the air cooler 4 is drained, the upper and lower covers of the air cooler 4 are removed, the pressure-pressurizing fixture 2 is installed on the upper support plate 5 of the air cooler 4, and the plugging fixture 3 is installed on the lower support plate 5. The device is then pressurized and secured. It is then connected to the pressure pump 1 via the first pressure-resistant water pipe 63 and the second pressure-resistant water pipe 68.

[0072] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5In this embodiment, the pipeline pressurization equipment and the slidable support can be precisely positioned. Using the pressurization water pump 1 as a power source, the first water injection piston cylinder 8, the second water injection piston cylinder 9, the first blocking piston cylinder 13 and the second blocking piston cylinder 14 generate force under the action of water pressure, pressing the insertion cone 11 and the plug cone 16 inserted into the pipeline, avoiding manual adjustment and tightening by bolts, and ensuring that the pipe end does not leak. The first piston tube 10 can transmit force and pressurize water. After the pressurization is completed and the pressure is released, the piston tube moves upward under the action of the return spring, thereby resetting the insertion cone 11 and the plug cone 16.

[0073] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment of this invention, a method for using the single-pipe pressure testing system of the generator air cooler 4 is also provided: First, install the first locking foot 17 and the second locking foot 18 of the pressure locking bracket 6 on the top support plate 5 of the air cooler 4, keeping the first dovetail slide rail 23 perpendicular to the first locking foot 17 and the second locking foot 18. After tightening the first adjusting bolt 24 and the second adjusting bolt 25, align the insertion cone 11 of the end of the first piston rod with one end of the copper tube of the air cooler 4, and tighten the first locking screw 21 and the second locking screw 22 so that the first locking screw 21 and the second locking screw 22 are locked with the edge of the top support plate 5 of the air cooler 4. The first water injection piston cylinder 8 and the second water injection piston cylinder 9 slide along the first dovetail slide rail 23. Next, install the third locking foot 41 and the fourth locking foot 42 of the blocking locking bracket 7 on the bottom support plate 5 of the air cooler 4, keep the second dovetail slide rail 47 perpendicular to the third locking foot 41 and the fourth locking foot 42, tighten the third adjusting bolt 48 and the fourth adjusting bolt 49, align the plug cone 16 at the end of the second piston rod with the other end of the copper tube of the air cooler 4, tighten the third locking screw 45 and the fourth locking screw 46, so that the third locking screw 45 and the fourth locking screw 46 are locked with the edge of the bottom support plate 5 of the air cooler 4, and the first blocking piston cylinder 13 and the second blocking piston cylinder 14 slide along the second dovetail slide rail 47; Next, align the insertion cone 11 and the plug cone 16 with the same copper pipe. Connect the pressure testing fixture 2 and the plugging fixture 3 to the pressure testing water pump 1 using the first pressure-resistant water pipe 63 and the second pressure-resistant water pipe 68. Start the pressure testing water pump 1 and open the first manual ball valve 33 and the second manual ball valve 55. One path of high-pressure water from the pressure testing water pump 1 enters the first water injection piston cylinder 8 or the second water injection piston cylinder 9 through the first pressure-resistant water pipe 63, the first water tee 27, the first flexible hose 30, the first high-strength metal pipe 29, the first branch pipe 32, and the first pressure-resistant pipe 34, causing pressurized water to flow through the upper chambers of the first water injection piston cylinder 8 and the second water injection piston cylinder 9. The other path of high-pressure water from the pressure testing water pump 1 enters the first water injection piston cylinder 8 or the second water injection piston cylinder 9 through the second pressure-resistant pipe 63, the first water tee 27, the first flexible hose 30, the first high-strength metal pipe 29, the first branch pipe 32, and the first pressure-resistant pipe 34. The water pressure pipe 68, the second water tee 51, the second flexible hose 53, the second high-strength metal pipe 52, the second branch pipe 54, and the second pressure-resistant pipe 56 enter the first blocking piston cylinder 13 or the second blocking piston cylinder 14, so that the upper chamber of the first blocking piston cylinder 13 and the second blocking piston cylinder 14 is filled with pressurized water. At this time, the first piston plate 35 and the second piston plate 57 drive the first piston tube 10 and the second piston tube 15 to move downward, thereby inserting the insertion cone 11 and the plug cone 16 into the two ends of the same copper pipe respectively. The first O-ring seal 65, the second O-ring seal 70, the first flat seal 67 and the second flat seal 72 are pressed together under the force generated by the cylinder, so as to play a sealing role. Then, close the first manual ball valve 33 and the second manual ball valve 55, open the pressure holding ball valve 28, and inject high-pressure water into the copper pipe of the air cooler 4 through the first high-strength metal pipe 29, the first piston pipe 10 and the water injection hole 12. When the pressure value of the pressure gauge 31 reaches the pressure holding value, close the pressure holding ball valve 28. The staff observes whether the reading of the pressure gauge 31 changes and judges whether the copper pipe of the air cooler 4 is leaking. The pressure holding test of the two copper pipes is carried out at the same time each time. Finally, after completion, turn on the pressure relief switch 73 on the pressure pump 1, open the pressure holding ball valve 28 to release pressure in the copper pipe, open the first manual ball valve 33 and the second manual ball valve 55 to release pressure in the first water injection piston cylinder 8, the second water injection piston cylinder 9, the first blocking piston cylinder 13 and the second blocking piston cylinder 14, insert the cone 11 and the plug cone 16 and withdraw them from the copper pipe under the action of the first return spring 64 and the second return spring 69. The first water injection piston cylinder 8, the second water injection piston cylinder 9, the first blocking piston cylinder 13 and the second blocking piston cylinder 14 move along the first dovetail slide rail 23 and the second dovetail slide rail 47 respectively to perform the next batch of copper pipe inspection. After one horizontal row of pipes has been inspected, loosen the first clamping screw 21, the second clamping screw 22, the third clamping screw 45 and the fourth clamping screw 46. The pressure testing fixture 2 and the blocking fixture 3 slide vertically on the pipe support plate 5 at the top and bottom of the air cooler 4 respectively to perform the next batch of pipe pressure resistance inspection.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A single-pipe pressurization system for a generator air cooler, characterized in that: Including a pressure pump (1); The outlet end of the pressurizing water pump (1) is connected to a pressurizing fixture (2) and a blocking fixture (3). The pressurizing fixture (2) and the blocking fixture (3) respectively have a pressurizing locking bracket (6) and a blocking locking bracket (7) installed on the pipe plates (5) at both ends of the air cooler (4). The pressure locking frame (6) is slidably connected to a first water injection piston cylinder (8) and a second water injection piston cylinder (9) for pressurizing water injection along the transverse direction of the bearing plate (5). Both the first water injection piston cylinder (8) and the second water injection piston cylinder (9) have a retractable first piston tube (10) in the axial direction. An insertion cone (11) is installed at the end of the first piston tube (10). The insertion cone (11) has a water injection through hole (12) communicating with the first piston tube (10) in the axial direction. The blocking locking frame (7) is slidably connected to the first blocking piston cylinder (13) and the second blocking piston cylinder (14) for blocking along the transverse direction of the support plate (5). The first blocking piston cylinder (13) and the second blocking piston cylinder (14) both have a retractable second piston tube (15) in the axial direction. A plug cone (16) is installed at the end of the second piston tube (15).

2. The generator air cooler (4) single-pipe pressure testing system according to claim 1, characterized in that: The pressure locking frame (6) has a first locking foot (17) and a second locking foot (18) that are parallel to each other and spaced apart. A first locking block (19) and a second locking block (20) are symmetrically distributed on opposite sides of the first locking foot (17) and the second locking foot (18). A first locking screw (21) and a second locking screw (22) are respectively provided at the bottom of the first locking block (19) and the second locking block (20). The first locking screw (21) and the second locking screw (22) are respectively threaded to the inner side of the bottom end of the first locking foot (17) and the second locking foot (18) and perpendicular to the first locking block (19) and the second locking block (20).

3. The generator air cooler (4) single-pipe pressure testing system according to claim 2, characterized in that: A first dovetail slide rail (23) is provided between the top ends of the first locking foot (17) and the second locking foot (18). The two ends of the first dovetail slide rail (23) are connected to the top ends of the first locking foot (17) and the second locking foot (18) respectively by a first adjusting bolt (24) and a second adjusting bolt (25). The first water injection piston cylinder (8) and the second water injection piston cylinder (9) are slidably connected to the first dovetail slide rail (23).

4. The generator air cooler (4) single-pipe pressure testing system according to claim 3, characterized in that: A first bracket (26) is provided between the first water injection piston cylinder (8) and the second water injection piston cylinder (9), and the top of the first bracket (26) has a first water passage tee (27) that connects to the pressure pump (1); The first piston tube (10) of the first water injection piston cylinder (8) and the second water injection piston cylinder (9) are both connected to a pressure-holding ball valve (28). The end of the pressure-holding ball valve (28) away from the first piston tube (10) is connected to a first high-strength metal pipe (29). A first flexible hose (30) is connected between the first water tee (27) and the first high-strength metal pipe (29). A pressure gauge (31) is connected to the first piston tube (10) between the first water injection piston cylinder (8) or the second water injection piston cylinder (9) and the pressure holding ball valve (28); A first branch pipe (32) is welded onto the first high-strength metal pipe (29). The first branch pipe (32) has a first manual ball valve (33). The end of the first branch pipe (32) away from the first piston pipe (10) is connected to a first pressure-resistant pipe (34). The end of the first pressure-resistant pipe (34) away from the first branch pipe (32) is connected to the tail end of the cylinder body of the first water injection piston cylinder (8) or the second water injection piston cylinder (9). The first piston tube (10) has a first piston plate (35) in the radial direction, and a first water-blocking ring (36) in the circumferential direction of the first piston plate (35). The outer walls of the first piston plate (35) and the first water-blocking ring (36) are in a sealing sliding fit with the inner wall of the first water injection piston cylinder (8) or the second water injection piston cylinder (9).

5. The generator air cooler (4) single-pipe pressure testing system according to claim 4, characterized in that: The bottom end of the first bracket (26) has a first dovetail groove (37), which is slidably adapted to the first dovetail slide rail (23). The two sides of the first dovetail groove (37) have a first small bracket (38) and a second small bracket (39), respectively. The first small bracket (38) and the second small bracket (39) are respectively welded to the outer walls of the first water injection piston cylinder (8) and the second water injection piston cylinder (9). The first small bracket (38) and the second small bracket (39) each have a first support (40).

6. The generator air cooler (4) single-pipe pressure testing system according to claim 1, characterized in that: The blocking locking frame (7) has a third locking foot (41) and a fourth locking foot (42) that are parallel to each other and spaced apart. A third locking block (43) and a fourth locking block (44) are symmetrically distributed on opposite sides of the third locking foot (41) and the fourth locking foot (42). A third locking screw (45) and a fourth locking screw (46) are respectively provided at the bottom of the third locking block (43) and the fourth locking block (44). The third locking screw (45) and the fourth locking screw (46) are respectively threaded to the inner side of the bottom end of the third locking foot (41) and the fourth locking foot (42) and are perpendicular to the third locking block (43) and the fourth locking block (44).

7. A generator air cooler (4) single-pipe pressure testing system according to claim 6, characterized in that: A second dovetail slide rail (47) is provided between the top ends of the third locking foot (41) and the fourth locking foot (42). The two ends of the second dovetail slide rail (47) are connected to the top ends of the third locking foot (41) and the fourth locking foot (42) respectively by a third adjusting bolt (48) and a fourth adjusting bolt (49). The first blocking piston cylinder (13) and the second blocking piston cylinder (14) are slidably connected on the second dovetail slide rail (47).

8. The generator air cooler (4) single-pipe pressure testing system according to claim 7, characterized in that: A second bracket (50) is provided between the first blocking piston cylinder (13) and the second blocking piston cylinder (14), and the top of the second bracket (50) has a second water tee (51) that connects to the pressurizing water pump (1); The tail end of the second piston tube (15) of the first blocking piston cylinder (13) and the second blocking piston cylinder (14) is connected to a second high-strength metal tube (52), and a second hose (53) is connected between the second water tee (51) and the second high-strength metal tube (52). A second branch pipe (54) is welded radially to the second high-strength metal pipe (52). The second branch pipe (54) has a second manual ball valve (55). The end of the second branch pipe (54) away from the sealing cavity is connected to a second pressure-resistant pipe (56). The end of the second pressure-resistant pipe (56) away from the second branch pipe (54) is connected to the cylinder tail end of the first blocking piston cylinder (13) or the second blocking piston cylinder (14). The second piston tube (15) has a second piston plate (57) in the radial direction, and a second water-blocking ring (58) in the circumferential direction of the second piston plate (57). The outer walls of the second piston plate (57) and the second water-blocking ring (58) are in a sealing sliding fit with the inner wall of the first blocking piston cylinder (13) or the second blocking piston cylinder (14).

9. A generator air cooler (4) single-pipe pressure testing system according to claim 8, characterized in that: The bottom end of the second bracket (50) has a second dovetail groove (59), which is slidably adapted to the second dovetail slide rail (47). The two sides of the second dovetail groove (59) have a third small bracket (60) and a fourth small bracket (61), respectively. The third small bracket (60) and the fourth small bracket (61) are respectively welded to the outer walls of the first blocking piston cylinder (13) and the second blocking piston cylinder (14). The third small bracket (60) and the fourth small bracket (61) each have a second support (62).

10. A method of using a single-pipe pressurization system for a generator air cooler (4) according to any one of claims 1 to 9, characterized in that: First, install the first locking foot (17) and the second locking foot (18) of the pressure locking bracket (6) on the top support plate (5) of the air cooler (4), keep the first dovetail slide rail (23) perpendicular to the first locking foot (17) and the second locking foot (18), tighten the first adjusting bolt (24) and the second adjusting bolt (25), align the insertion cone (11) at the end of the first piston rod with one end of the copper tube of the air cooler (4), tighten the first locking screw (21) and the second locking screw (22), so that the first locking screw (21) and the second locking screw (22) are locked with the edge of the top support plate (5) of the air cooler (4), and the first water injection piston cylinder (8) and the second water injection piston cylinder (9) slide along the first dovetail slide rail (23); Next, the third locking foot (41) and the fourth locking foot (42) of the plugging locking bracket (7) are installed on the bottom support plate (5) of the air cooler (4), keeping the second dovetail slide rail (47) perpendicular to the third locking foot (41) and the fourth locking foot (42). After tightening the third adjusting bolt (48) and the fourth adjusting bolt (49), the plug cone (16) at the end of the second piston rod is aligned with the other end of the copper tube of the air cooler (4). The third locking screw (45) and the fourth locking screw (46) are tightened so that the third locking screw (45) and the fourth locking screw (46) are locked to the edge of the bottom support plate (5) of the air cooler (4). The first plugging piston cylinder (13) and the second plugging piston cylinder (14) slide along the second dovetail slide rail (47). Next, align the insertion cone (11) and the plug cone (16) with the same copper pipe, and connect the pressure-pressuring tool (2) and the plugging tool (3) to the pressure-pressuring water pump (1) using the first pressure-resistant water pipe (63) and the second pressure-resistant water pipe (68). Start the pressure-pressuring water pump (1), open the first manual ball valve (33) and the second manual ball valve (55), and one path of high-pressure water from the pressure-pressuring water pump (1) enters the first water injection piston cylinder (8) or the second water injection piston cylinder (9) through the first pressure-resistant water pipe (63), the first water-passing tee (27), the first hose (30), the first high-strength metal pipe (29), the first branch pipe (32), and the first pressure-resistant pipe (34), so that the upper chamber of the first water injection piston cylinder (8) and the second water injection piston cylinder (9) is filled with pressurized water; the other path of high-pressure water from the pressure-pressuring water pump (1) is filled with pressurized water. The second pressure-resistant water pipe (68), the second water-passing tee (51), the second flexible hose (53), the second high-strength metal pipe (52), the second branch pipe (54), and the second pressure-resistant pipe (56) enter the first blocking piston cylinder (13) or the second blocking piston cylinder (14), so that the upper chamber of the first blocking piston cylinder (13) and the second blocking piston cylinder (14) is filled with pressurized water. At this time, the first piston plate (35) and the second piston plate (57) drive the first piston tube (10) and the second piston tube (15) to move downward, thereby inserting the insertion cone (11) and the plug cone (16) into the two ends of the same copper pipe respectively. The first O-ring seal (65), the second O-ring seal (70), the first flat seal (67), and the second flat seal (72) are pressed together under the force generated by the cylinder, so as to play a sealing role. Then, close the first manual ball valve (33) and the second manual ball valve (55), open the pressure holding ball valve (28), and inject water into the copper pipe of the air cooler (4) through the first high-strength metal pipe (29), the first piston pipe (10) and the water injection hole (12). When the pressure value of the pressure gauge (31) reaches the pressure holding value, close the pressure holding ball valve (28). The staff observes whether the reading of the pressure gauge (31) changes and judges whether the copper pipe of the air cooler (4) is leaking. The pressure holding test of two copper pipes is carried out at the same time each time. Finally, after completion, the pressure relief switch (73) on the pressurizing water pump (1) is turned on, and the pressure holding ball valve (28) is opened to release pressure in the copper pipe. The first manual ball valve (33) and the second manual ball valve (55) are opened to release pressure in the first water injection piston cylinder (8), the second water injection piston cylinder (9), the first blocking piston cylinder (13), and the second blocking piston cylinder (14). The insertion cone (11) and the plug cone (16) are withdrawn from the copper pipe under the action of the first return spring (64) and the second return spring (69). The first water injection piston cylinder (8) The second water injection piston cylinder (9), the first blocking piston cylinder (13), and the second blocking piston cylinder (14) move along the first dovetail slide rail (23) and the second dovetail slide rail (47) respectively to inspect the next batch of copper pipes. After a horizontal row of pipes is inspected, the first clamping screw (21), the second clamping screw (22), the third clamping screw (45), and the fourth clamping screw (46) are loosened. The pressure testing fixture (2) and the blocking fixture (3) slide vertically on the pipe support plate (5) at the top and bottom of the air cooler (4) respectively to inspect the next batch of pipe pressure resistance.

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