Forced cooling device of steam turbine

Abstract

The invention discloses a steam turbine forced cooling device, and relates to the field of steam turbine cooling, the steam turbine forced cooling device comprises a steam turbine main body, a steam inlet pipe and a steam outlet pipe, and the steam inlet pipe and the steam outlet pipe are installed at the two ends of the steam turbine main body; an air exhaust pipeline frame is fixedly installed on the side wall of the steam turbine body, a water storage cooling tank is fixed below a dripping water outlet pipe, an air suction cooling pipe is fixedly installed at the top end of the water storage cooling tank, moisture absorption flow guide cotton plates are fixed to the water storage cooling tank at equal intervals, and a first electromagnetic valve is installed on the air exhaust pipeline frame. A hollow mounting frame is arranged on the side wall of the air exhaust pipeline frame, and an air exhaust mechanism is embedded in the hollow mounting frame. According to the steam turbine, external air enters the water storage cooling box along the air suction cooling pipe, moisture on the moisture absorption flow guide panel is rapidly evaporated in the flowing process of the air, so that heat in the air is absorbed, and the heat dissipation effect of the steam turbine is improved.

Description

Technical Field

[0001] The present invention relates to the field of steam turbine cooling, in particular to a steam turbine forced cooling device. Background Art

[0002] Steam turbines typically introduce high-temperature steam exceeding 500°C at the turbine inlet. Consequently, when disassembly work is required for regular inspections or in the event of a turbine failure, cooling to a temperature at which rotation can cease through natural heat dissipation takes considerable time. During this period, power cannot be supplied. Therefore, minimizing this cooling time is desirable for both stable power supply and economic efficiency.

[0003] Patent application number 201910001702.4 discloses a cooling device for a steam turbine, which relates to the field of cooling devices; it includes a turbine, a cooling gas tank, a nozzle and a cooling pipeline. A first electromagnetic three-way valve is provided at the top of the cooling gas tank. The steam outlet pipe of the cooling gas tank is connected to the first end of the first electromagnetic three-way valve. The second end of the first electromagnetic three-way valve is connected to the cooling pipeline provided in the rotor through an air pipe. The third end of the first electromagnetic three-way valve is connected to the first end of the second electromagnetic three-way valve through a connecting pipe. The second end of the second electromagnetic three-way valve is connected to the air supply pipeline. The third end of the second electromagnetic three-way valve is connected to the nozzle provided on the inner side of the turbine casing through an inflation pipe. The air inlet pipe of the cooling pipeline is provided at the center of the shaft of the rotor and passes through the rotor and is rotatably connected to the air pipe; the air outlet pipe of the cooling pipeline is connected to the exhaust chamber provided in the output shaft of the rotor, and the side of the output shaft is provided with an exhaust hole connected to the exhaust chamber; the cooling pipeline extends spirally in the rotor.

[0004] The above technical solution utilizes a combination of a traditional cooling gas tank and an exhaust pump to improve the cooling efficiency of the steam turbine. However, since the temperature of the surrounding environment will rise when the steam turbine is working, the gas drawn in by the exhaust pump is mostly high-temperature gas, resulting in poor cooling effect on the steam turbine and low cooling efficiency. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a steam turbine forced cooling device to solve the technical problem that the temperature of the surrounding environment will increase when the steam turbine is working, so the gas sucked in by the vacuum pump is mostly high-temperature gas, resulting in poor cooling effect and low cooling efficiency of the steam turbine.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a steam turbine forced cooling device, comprising a steam turbine body and a steam inlet pipe and a steam outlet pipe installed at both ends of the steam turbine body, a drip outlet pipe being fixed at the bottom end of the steam turbine body, and an exhaust pipe rack being fixedly installed on the side wall of the steam turbine body, a water storage cooling box being fixed below the drip outlet pipe, an intake cooling pipe being fixedly installed at the top of the water storage cooling box, and moisture-absorbing guide cotton plates being equidistantly fixed in the water storage cooling box, a first solenoid valve being installed on the exhaust pipe rack, and a hollow mounting rack being provided on the side wall of the exhaust pipe rack, wherein an exhaust mechanism is embedded in the hollow mounting rack.

[0007] The present invention is further configured such that an overflow pipe is fixedly installed at the center of the side wall of the water storage cooling box, and a U-shaped anti-deflation elbow is provided at the center of the overflow pipe.

[0008] The present invention is further configured such that arcuate sealing frames are provided at both ends of the steam turbine body, and sealing connection parts are provided on the steam turbine body and the arcuate sealing frames, and a first bolt is provided between the two sealing connection parts on the same side.

[0009] The present invention is further configured such that a plurality of the first bolts are arranged in an annular array on the side wall of the sealing connection portion, and one end of the first bolt passes through the sealing connection portion and is threadedly sleeved with a nut.

[0010] The present invention is further configured such that the steam inlet pipe and the steam outlet pipe are respectively mounted on two arc-shaped sealing frames, and the side walls of the exhaust pipe frame are mounted with second bolts threadedly inserted into the arc-shaped sealing frames in an annular array.

[0011] The present invention is further configured such that a second solenoid valve is installed at the top end of the air intake cooling pipe, and cooling channels are provided between the plurality of moisture absorption and flow guide cotton plates.

[0012] The present invention is further configured such that a temperature monitoring controller is embedded and fixed at the top of the steam turbine body, the temperature monitoring controller is electrically connected to the first solenoid valve and the second solenoid valve respectively, and a temperature sensing module is installed at one end of the temperature controller extending into the steam turbine body.

[0013] The present invention is further configured such that the hollow mounting frame is a funnel-shaped structure fixedly connected to the exhaust pipe frame, and the exhaust mechanism includes a high-speed exhaust fan and a dustproof net arranged in the hollow mounting frame, and the dustproof net is fixedly connected to the side wall of the high-speed exhaust fan.

[0014] The present invention is further configured such that slots are provided on both sides of the inner wall of the water storage and cooling box, and both ends of the moisture absorption and flow guide cotton plate are embedded and connected in the slots of the inner wall of the water storage and cooling box.

[0015] The present invention is further configured such that a steam impeller is rotatably mounted at the center of the steam turbine body, and the steam inlet pipe corresponds to the blades of the impeller of the steam turbine body.

[0016] In summary, the present invention mainly has the following beneficial effects: the present invention provides a steam inlet pipe and a steam outlet pipe on the steam turbine, and a small amount of water droplets will be generated in the process of steam flowing through the pipe in the steam turbine body. The accumulated water droplets flow along the bottom of the steam turbine and the drip outlet pipe into the water storage cooling box for natural cooling. When the temperature sensing module at the bottom of the temperature monitoring controller detects that the temperature in the steam turbine body is too high, the control valves on the steam inlet pipe and the steam outlet pipe are closed respectively, and the high-speed exhaust fan, the first solenoid valve and the second solenoid valve are started to circulate air in the steam turbine body. The external air enters the water storage cooling box along the air intake cooling pipe and is discharged between multiple moisture-absorbing guide cotton plates. After flowing through the water storage tank, the water flows along the drip outlet pipe to dissipate heat to the steam turbine body and is then discharged from the exhaust pipe rack. During the flow of air, the water on the hygroscopic guide panel evaporates quickly, thereby absorbing the heat in the air, greatly reducing the air temperature for cooling the steam turbine body and improving the heat dissipation effect of the steam turbine. An overflow pipe is fixed on the water storage cooling box. When there is too much water in the water storage cooling box, the water is discharged along the overflow pipe, thereby maintaining an air flow channel at the top of the water storage cooling box. At the same time, the vent elbow and the first solenoid valve on the suction cooling pipe keep the water storage cooling box relatively sealed, and the second solenoid valve keeps the exhaust pipe rack sealed, thereby avoiding leakage of steam during the flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0019] Figure 3 For the present invention Figure 1 A schematic diagram of the structure at center A;

[0020] Figure 4 Schematic diagram of the overflow pipe structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the split structure of the hollow mounting frame of the present invention;

[0022] Figure 6 It is a schematic cross-sectional structural diagram of the water storage cooling box of the present invention.

[0023] In the figure: 1. Steam turbine body; 2. Steam inlet pipe; 3. Temperature monitoring controller; 4. Sealing connection; 5. Control valve; 6. Intake cooling pipe; 7. First solenoid valve; 8. Water storage cooling box; 9. Drip outlet pipe; 10. First bolt; 11. Arc-shaped sealing frame; 12. Overflow pipe; 13. Second bolt; 14. Second solenoid valve; 15. Exhaust pipe frame; 16. Anti-leakage elbow; 17. Hollow mounting frame; 18. Dust screen; 19. High-speed exhaust fan; 20. Moisture-absorbing guide cotton plate; 21. Steam outlet pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0025] A steam turbine forced cooling device, such as Figure 1-6 As shown, it includes a steam turbine body 1 and a steam inlet pipe 2 and a steam outlet pipe 21 installed at both ends of the steam turbine body 1. A cooling device is installed on the air inlet pipe. Circulating cooling using the cooling device is common knowledge in the field and will not be described in detail here. When the temperature is too high, the control valve 5 is closed for forced cooling. The control valve 5 can be replaced by an electrically controlled valve connected to the temperature monitoring controller 3. A drip outlet pipe 9 is fixed to the bottom end of the steam turbine body 1, and an exhaust pipe rack 15 is fixed to the side wall of the steam turbine body 1. A water storage cooling box 8 is fixed below the drip outlet pipe 9. An air intake cooling pipe 6 is fixed to the top of the water storage cooling box 8, and a moisture-absorbing guide cotton plate 20 is fixed at an equal distance in the water storage cooling box 8. A first solenoid valve 7 is installed on the exhaust pipe rack 15, and a hollow mounting rack 17 is provided on the side wall of the exhaust pipe rack 15. An exhaust mechanism is embedded in the hollow mounting rack 17. A small amount of water droplets will be generated during the flow of water through the pipeline in the steam turbine body 1. The accumulated water droplets flow along the bottom of the steam turbine and the drip outlet pipe 9 into the water storage cooling box 8 for natural cooling. When the temperature sensor module at the bottom of the temperature monitoring controller 3 detects that the temperature in the steam turbine body 1 is too high, it closes the control valve 5 on the steam inlet pipe 2 and the steam outlet pipe 21 respectively, and starts the high-speed exhaust fan 19, the first solenoid valve 7 and the second solenoid to circulate air in the steam turbine body 1. The external air enters the water storage cooling box 8 along the intake cooling pipe 6, flows between multiple moisture-absorbing guide cotton plates 20, and then flows along the drip outlet pipe 9 to dissipate heat to the steam turbine body 1 and is discharged from the exhaust pipe rack 15. During the flow of air, the moisture on the moisture-absorbing guide panel evaporates rapidly, thereby absorbing heat in the air, greatly reducing the air temperature for cooling the steam turbine body 1.

[0026] An overflow pipe 12 is fixedly installed at the center of the side wall of the water storage cooling box 8, and a U-shaped anti-deflation elbow 16 is provided at the center of the overflow pipe 12. Arc-shaped sealing frames 11 are provided at both ends of the steam turbine body 1, and sealing connection parts 4 are provided on the steam turbine body 1 and the arc-shaped sealing frames 11. A first bolt 10 is provided between the two sealing connection parts 4 on the same side. A plurality of first bolts 10 are arranged in a circular array on the side wall of the sealing connection part 4, and the first bolt 10 passes through one end of the sealing connection part 4 and is threaded with a nut. After the nut is tightened, the first bolt 10 squeezes and fixes the two sealing connection parts 4, thereby improving The arc-shaped sealing frame 11 is installed to ensure tightness. The steam inlet pipe 2 and the steam outlet pipe 21 are respectively installed on the two arc-shaped sealing frames 11. The side wall of the exhaust pipe frame 15 is installed with a second bolt 13 threadedly inserted into the arc-shaped sealing frame 11 in a circular array. When there is too much water in the water storage cooling box 8, the water is discharged along the overflow pipe 12, so that the top of the water storage cooling box 8 maintains an air flow channel. At the same time, the first solenoid valve 7 on the air release elbow and the intake cooling pipe 6 keeps the water storage cooling box 8 relatively sealed. At the same time, the second solenoid valve 14 keeps the exhaust pipe frame 15 sealed, avoiding leakage of steam during the flow process.

[0027] Furthermore, a second solenoid valve 14 is installed at the top of the intake cooling pipe 6, and a cooling channel is provided between the multiple moisture-absorbing guide cotton plates 20. A temperature monitoring controller 3 is embedded and fixed at the top of the steam turbine body 1. The temperature monitoring controller 3 is electrically connected to the first solenoid valve 7 and the second solenoid valve 14 respectively, and a temperature sensing module is installed at one end of the temperature controller extending into the steam turbine body 1. The hollow mounting frame 17 is a funnel-shaped structure fixedly connected to the exhaust pipe frame 15. The exhaust mechanism includes a high-speed exhaust fan 19 and a dust-proof net 18 arranged in the hollow mounting frame 17. The dust-proof net 18 is fixedly connected to the side wall of the high-speed exhaust fan 19. Slots are provided on both sides of the inner wall of the water storage cooling box 8. Both ends of the moisture-absorbing guide cotton plates 20 are embedded and connected to the slots on the inner wall of the water storage cooling box 8. A steam impeller is rotatably installed at the center position of the steam turbine body 1, and the steam inlet pipe 2 is connected to the impeller of the steam turbine body 1. Corresponding to the sheet, a small amount of water droplets will be generated during the flow of steam through the pipeline in the steam turbine main body 1. The accumulated water droplets flow along the bottom of the steam turbine and the drip outlet pipe 9 into the water storage cooling box 8 for natural cooling. When the temperature sensing module at the bottom of the temperature monitoring controller 3 detects that the temperature in the steam turbine main body 1 is too high, it closes the control valve 5 on the steam inlet pipe 2 and the steam outlet pipe 21 respectively, and starts the high-speed exhaust fan 19, the first solenoid valve 7 and the second solenoid to circulate air in the steam turbine main body 1. The external air enters the water storage cooling box 8 along the intake cooling pipe 6, flows between multiple moisture-absorbing guide cotton plates 20, and then flows along the drip outlet pipe 9 to dissipate heat to the steam turbine main body 1 and is discharged from the exhaust pipe rack 15. During the flow of air, the moisture on the moisture-absorbing guide panel evaporates rapidly, thereby absorbing heat in the air, greatly reducing the air temperature for cooling the steam turbine main body 1.

[0028] The working principle of the present invention is as follows: when in use, a small amount of water droplets will be generated in the process of steam flowing through the steam inlet pipe 2 and the steam outlet pipe 21 in the steam turbine body 1. The accumulated water droplets flow along the bottom of the steam turbine and the drip outlet pipe 9 into the water storage cooling box 8 for natural cooling. When the temperature sensing module at the bottom of the temperature monitoring controller 3 detects that the temperature in the steam turbine body 1 is too high, the control valves 5 on the steam inlet pipe 2 and the steam outlet pipe 21 are closed respectively, and the high-speed exhaust fan 19, the first solenoid valve 7 and the second solenoid are started to circulate air in the steam turbine body 1. The external air enters the water storage cooling box 8 along the intake cooling pipe 6, flows between multiple moisture-absorbing guide cotton plates 20, and then flows along the drip outlet pipe. 9 After the heat is dissipated from the steam turbine body 1, it is discharged from the exhaust pipe rack 15. During the flow of air, the moisture on the hygroscopic guide panel evaporates quickly, thereby absorbing the heat in the air, greatly reducing the air temperature for cooling the steam turbine body 1, and improving the heat dissipation effect of the steam turbine; an overflow pipe 12 is fixed on the water storage cooling box. When there is too much water in the water storage cooling box 8, the water is discharged along the overflow pipe 12, so that the top of the water storage cooling box 8 maintains an air flow channel, and at the same time, the first solenoid valve 7 on the air discharge elbow and the intake cooling pipe 6 keeps the water storage cooling box 8 relatively sealed, and the second solenoid valve 14 keeps the exhaust pipe rack 15 sealed, avoiding leakage of steam during the flow.

[0029] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A steam turbine forced cooling device, comprising a steam turbine body (1) and a steam inlet pipe (2) and a steam outlet pipe (21) installed at both ends of the steam turbine body (1), characterized in that: A dripping water outlet pipe (9) is fixed at the bottom end of the steam turbine body (1), and an exhaust pipe rack (15) is fixedly installed on the side wall of the steam turbine body (1), a water storage cooling box (8) is fixed below the dripping water outlet pipe (9), an air intake cooling pipe (6) is fixedly installed on the top of the water storage cooling box (8), and a moisture-absorbing guide cotton plate (20) is fixed at an equal distance on the water storage cooling box (8), a first solenoid valve (7) is installed on the exhaust pipe rack (15), and a hollow mounting rack (17) is provided on the side wall of the exhaust pipe rack (15), and an exhaust mechanism is embedded in the hollow mounting rack (17).

2. A steam turbine forced cooling device according to claim 1, characterized in that: An overflow pipe (12) is fixedly installed at the center of the side wall of the water storage cooling box (8), and a U-shaped anti-deflation elbow (16) is provided at the center of the overflow pipe (12).

3. The steam turbine forced cooling device according to claim 1, characterized in that: Both ends of the steam turbine body (1) are provided with arc-shaped sealing frames (11), and sealing connection parts (4) are provided on the steam turbine body (1) and the arc-shaped sealing frames (11), and a first bolt (10) is provided between the two sealing connection parts (4) on the same side.

4. A steam turbine forced cooling device according to claim 3, characterized in that: A plurality of the first bolts (10) are arranged in an annular array on the side wall of the sealing connection portion (4), and one end of the first bolt (10) passes through the sealing connection portion (4) and is threadedly sleeved with a nut.

5. The steam turbine forced cooling device according to claim 4, characterized in that: The steam inlet pipe (2) and the steam outlet pipe (21) are respectively mounted on two arc-shaped sealing frames (11); the side wall of the exhaust pipe frame (15) is provided with a second bolt (13) threadedly inserted into the arc-shaped sealing frame (11) in an annular array.

6. The steam turbine forced cooling device according to claim 1, characterized in that: A second solenoid valve (14) is installed at the top end of the air intake cooling pipe (6), and cooling channels are provided between the plurality of moisture absorption and flow guide cotton plates (20).

7. The steam turbine forced cooling device according to claim 6, characterized in that: A temperature monitoring controller (3) is embedded and fixed at the top of the steam turbine body (1), and the temperature monitoring controller (3) is electrically connected to the first solenoid valve (7) and the second solenoid valve (14) respectively, and a temperature sensing module is installed at one end of the temperature controller (3) extending into the steam turbine body (1).

8. The steam turbine forced cooling device according to claim 1, characterized in that: The hollow mounting frame (17) is a funnel-shaped structure fixedly connected to the exhaust pipe frame (15); the exhaust mechanism comprises a high-speed exhaust fan (19) and a dustproof net (18) arranged in the hollow mounting frame (17); the dustproof net (18) is fixedly connected to the side wall of the high-speed exhaust fan (19).

9. The steam turbine forced cooling device according to claim 1, characterized in that: Both sides of the inner wall of the water storage cooling box (8) are provided with card slots, and both ends of the moisture absorption and flow guide cotton plate (20) are embedded and card-connected in the card slots of the inner wall of the water storage cooling box (8).

10. The steam turbine forced cooling device according to claim 1, characterized in that: A steam impeller is rotatably mounted at the center of the steam turbine body (1), and the steam inlet pipe (2) corresponds to the blades of the impeller of the steam turbine body (1).

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