Probe cooling device for steam turbine units

Abstract

A probe cooling device for a steam turbine unit is provided. [Solution] A cooling box 2 is mounted vertically at the center of the top of a mounting base plate 1, with air intakes located at the top center of both sides of the cooling box, an air intake duct 3 connected to one end of the air intake, exhaust pipes connected to exhaust ends at the front and lower back of the cooling box, a temperature reduction duct 5 attached horizontally to the exhaust end just above the top of the cooling box, and a first temperature reduction head 6 attached to the exhaust end of the temperature reduction duct. When the suction fan is operated, outside air enters the air inlet pipe through the filter cover and then enters the refrigerant air box along the intake pipe, and the cooled air enters the temperature reduction duct and is sprayed onto the probe through vent holes in the first and second temperature reduction heads to cool the probe.

Description

[Technical Field]

[0001] The present invention relates to the technical field of steam turbine unit probes, and more particularly to a probe cooling device for a steam turbine unit. [Background technology]

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam-powered device in which high-temperature, high-pressure steam passes through a fixed nozzle and accelerates into a stream of air that is injected into the blades, rotating a rotor with a row of blades and producing external work. Steam turbines are a key equipment in modern thermal power plants and are also used in the metallurgical and chemical industries and for marine power plants. With the development of metallurgical technology, the structure of steam turbines has also been greatly improved. Large units generally use a double structure with high- and medium-pressure cylinders, while high- and medium-pressure rotors use a single rotor structure. High-, medium-, and low-pressure rotors all use an integral forging structure, and tilting pad bearings are often used. Steam turbine units are usually equipped with a probe, which is an essential accessory measuring element.

[0003] Typical steam turbine unit probes include those for measuring rotational speed, shaft runout, differential expansion, axial displacement, eccentricity, lid runout, and thermal expansion. These probes are traditionally used to accurately measure and effectively monitor the steam turbine to ensure safe and stable operation. However, because the probes must be attached to the steam turbine unit for accurate detection, design flaws can lead to gas leaks in the shaft seal during operation. Furthermore, the small distance between the high-pressure and ultra-high-pressure cylinders creates significant heat radiation, resulting in particularly high ambient temperatures. This puts the probe in a high-temperature zone, potentially shortening its lifespan. Some equipment cools by drawing in external gas, sending it through a conduit to the head, and then injecting it onto the probe. However, due to hot gas leakage, the probe's cooling effectiveness is limited. Therefore, a probe cooling device for steam turbine units has been proposed. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the shortcomings of the current technology, the present invention provides a probe cooling device for a steam turbine unit to solve the above technical problems. [Means for solving the problem]

[0005] To achieve the above object, the present invention provides the following solution: a probe cooling device for a steam turbine unit, comprising a mounting base plate, a cooling box mounted vertically at the center of the top of the mounting base plate, air intakes installed at the center of the upper sides of both sides of the cooling box, an air intake duct connected to one end of the air intake, exhaust pipes connected to exhaust ends at the front and lower rear of the cooling box, a cooling duct mounted horizontally at the exhaust end just above the top of the cooling box, a first cooling head attached to the exhaust end of the cooling duct, a refrigerant air box connected to the intake end of the cooling duct, an intake pipe connected to the intake end at the lower side of one side of the refrigerant air box, and a suction fan connected to the intake end of the intake pipe.

[0006] Preferably, the entire mounting base plate is designed in the shape of a "double crown", with first mounting holes arranged horizontally on both sides of the mounting base plate, and second mounting holes arranged vertically on both sides of the top of the mounting base plate.

[0007] Preferably, a diverted intake pipe is connected to the center of both sides of the intake duct, an intake taper head is connected to the intake duct and the intake end of the diverted intake pipe, and the intake duct and the intake taper head of the diverted intake pipe are attached horizontally at the same height.

[0008] Preferably, an exhaust end at the tip of the exhaust pipe extends upward and communicates with an intake end located at a position corresponding to the bottom of the temperature reduction duct.

[0009] Preferably, a second temperature-reducing head is attached to one side of the outer surface of the temperature-reducing duct, and both sides of the second temperature-reducing head are connected to the temperature-reducing duct, and vent holes are installed around the outer surfaces of the first temperature-reducing head and the second temperature-reducing head.

[0010] Preferably, an air inlet pipe is attached vertically directly above the top of the suction fan, the exhaust end at the bottom of the air inlet pipe is connected in communication with the intake end at the top of the suction fan, and a filter cover is attached horizontally to the intake end at the top of the air inlet pipe. [Effects of the Invention]

[0011] Compared with the prior art, the present invention provides a probe cooling device for a steam turbine unit, which has the following beneficial effects: (1) In this steam turbine unit's probe cooling device, the outside air enters the air inlet pipe through the filter cover by operating the suction fan, and then enters the refrigerant wind box along the intake pipe. The refrigerant wind box is a standard, commercially available, and well-designed piece of equipment, so we won't go into detail here. The cooled air is then introduced into the cooling duct and sprayed onto the probe through vent holes in the first and second cooling heads to cool it down, thereby ensuring the probe's lifespan. (2) The probe cooling device for this steam turbine unit draws in hot gas leaking from the steam turbine into the intake duct and diverter intake pipe on both sides of the cooling box and takes it into the cooling box. The equipment for cooling the gas is a standard, commercially available, and well-designed device, so it will not be described here in detail. By taking the cooled gas into the cooling duct through which the exhaust pipe passes, it becomes easier to extract and cool the gas leaking from the steam turbine, lowering the temperature around the steam turbine and enabling efficient cooling of the probe. [Brief explanation of the drawings]

[0012] [Figure 1]FIG. 1 is a schematic diagram of the structure according to the present invention. [Figure 2] FIG. 2 is a diagram showing the structure of the rear view of the cooling box according to the present invention. [Figure 3] FIG. 3 is a side view of the refrigerant air box according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, the technical means in the embodiments of the present invention will be described clearly and completely with reference to the drawings of the embodiments of the present invention, but it is clear that the described embodiments are only some embodiments of the present invention and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative work fall within the scope of protection of the present invention.

[0014] This invention provides a probe cooling device for a steam turbine unit, comprising a mounting base plate 1, a cooling box 2, an intake duct 3, an exhaust pipe 4, a cooling duct 5, a first cooling head 6, a refrigerant wind box 7, an intake pipe 8, a suction fan 9, a diverting intake pipe 10, an intake tapered head 11, a second cooling head 12, an air inlet pipe 13, and a filter cover 14. Referring to FIG. 1, a cooling box 2 is vertically mounted at the center of the upper part of the mounting base plate 1. The cooling equipment for cooling gas is a standard, commercially available, and therefore will not be described in detail here. Air intakes are provided at the upper and central positions on both sides of the cooling box 2. An intake duct 3 is connected to one end of the intakes, allowing gas leaking from the turbine unit to be drawn in through the intake structure within the cooling box 2. Referring to FIG. 2, exhaust pipes 4 are connected to the exhaust ends at the front and lower rear of the cooling box 2, discharging cooled gas. Referring to Figure 1, a cooling duct 5 is attached horizontally to the exhaust end directly above the top of the cooling box 2, and a first cooling head 6 is attached to the exhaust end of the cooling duct 5 to cool nearby probes. Referring to Figure 3, a refrigerant air box 7 is connected to the intake end of the cooling duct 5, and an intake pipe 8 is connected to the intake end of the lower part of one side of the refrigerant air box 7. A suction fan 9 is connected to the intake end of the intake pipe 8, which draws outside air into the refrigerant air box 7 for cooling. The refrigerant air box 7 is a common, well-equipped device available on the market, so it will not be described in detail here.

[0015] Referring to FIG. 1, the mounting base plate 1 is designed in the shape of a Japanese crown, with first mounting holes installed horizontally on both sides of the mounting base plate 1 and second mounting holes installed vertically on both sides of the top of the mounting base plate 1. The mounting base plate 1 can be attached near the probe of the steam turbine unit, and the first cooling head 6 can be aligned with the probe.

[0016] Diverted intake pipes 10 are connected to the center of both sides of the intake duct 3, and intake taper heads 11 are connected to the intake ends of the intake duct 3 and the diverted intake pipes 10. The intake taper heads 11 attached to the intake duct 3 and the diverted intake pipes 10 are both installed horizontally at the same height, and multiple sets of ducts work together to increase the intake air speed, thereby preventing gas leakage from the steam turbine unit and increasing the surrounding temperature.

[0017] Referring to FIG. 2, the exhaust end at the tip of the exhaust pipe 4 extends upward and communicates with the intake end installed at a position corresponding to the bottom of the cooling duct 5, thereby drawing cooling gas into the cooling duct 5 and increasing the speed at which the cooling duct 5 cools the probe.

[0018] Referring to FIG. 1, a second cooling head 12 is attached to one side of the outer surface of the cooling duct 5, and both sides of the second cooling head 12 are connected to the cooling duct 5. Vent holes are installed around the outer surfaces of the first cooling head 6 and the second cooling head 12, allowing the first cooling head 6 and the second cooling head 12 to cool the corresponding probes.

[0019] Referring to FIG. 3, the air inlet pipe 13 is installed vertically directly above the top of the suction fan 9, and the exhaust end at the bottom of the air inlet pipe 13 is connected to the intake end at the top of the suction fan 9. A filter cover 14 is installed horizontally at the intake end at the top of the air inlet pipe 13, so that external air is drawn in and filtered by the filter cover 14.

[0020] The operating principle of this device is that when suction fan 9 is activated, outside air passes through filter cover 14 into air inlet pipe 13, then along intake pipe 8 into refrigerant air box 7, where the cooled air is taken into temperature-reducing duct 5 and sprayed onto the probe through vent holes in first temperature-reducing head 6 and second temperature-reducing head 12 to reduce the temperature. Intake duct 3 and branch intake pipe 10, located on both sides of cooling box 2, suck in hot gas leaking from the steam turbine and take it into cooling box 2, and the cooled gas is taken into temperature-reducing duct 5 via exhaust pipe 4.

[0021] It should be noted that, as used herein, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another and do not necessarily require or imply that any actual relationship or order exists between those entities or operations. Furthermore, the terms "comprise," "comprises," or any other variation thereof imply an inclusion that is not exclusive. Thus, a process, method, article, or facility that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent in such process, method, article, or facility.

[0022] Although the embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments of the present invention without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. [Explanation of symbols]

[0023] 1 Mounting base plate 2 Cooling Box 3. Intake duct 4 exhaust pipe 5. Cooling duct 6. First cooling head 7 Refrigerant wind box 8 Intake pipe 9 Suction fan 10. Divided intake pipe 11. Intake tapered head 12 Second cooling head 13 Air inlet pipe 14 Filter cover

Claims

1. 1. A probe temperature-reducing device for a steam turbine unit, comprising: a mounting base plate (1); a cooling box (2) mounted vertically at the center of the top of the mounting base plate; air intakes provided at the upper center of both sides of the cooling box; an air intake duct (3) connected in communication with one end of the air intake; exhaust pipes (4) connected in communication with exhaust ends at the front and lower rear of the cooling box; a temperature-reducing duct (5) attached horizontally to the exhaust end directly above the top of the cooling box (2); a first temperature-reducing head (6) attached to the exhaust end of the temperature-reducing duct (5); a refrigerant wind box (7) connected in communication with the intake end of the temperature-reducing duct (5); an intake pipe (8) connected in communication with the intake end at the lower side of one side of the refrigerant wind box (7); and a suction fan (9) connected in communication with the intake end of the intake pipe (8).

2. 2. The probe cooling device of claim 1, wherein the mounting base plate (1) is designed in the shape of a Japanese character "wakanmuri" (a square crown), and first mounting holes are installed horizontally on both sides of the mounting base plate (1), and second mounting holes are installed vertically on both sides of the top of the mounting base plate (1).

3. 2. The probe cooling device for a steam turbine unit according to claim 1, wherein a diverted intake pipe (10) is connected in communication with the center of both sides of the intake duct (3), an intake taper head (11) is connected to the intake ends of the intake duct (3) and the diverted intake pipe (10), and the intake duct (3) and the intake taper head (11) of the diverted intake pipe (10) are attached horizontally at the same height.

4. 2. The probe cooling device for a steam turbine unit according to claim 1, wherein an exhaust end at the tip of the exhaust pipe (4) extends upward and is connected to an intake end installed at a position corresponding to the bottom of the cooling duct (5).

5. 2. The probe cooling device for a steam turbine unit according to claim 1, wherein a second cooling head (12) is attached to one side of the outer surface of the cooling duct (5), both sides of the second cooling head (12) are connected to the cooling duct (5), and vent holes are installed around the outer surfaces of the first cooling head (6) and the second cooling head (12).

6. 2. The probe cooling device for a steam turbine unit according to claim 1, wherein an air inlet pipe (13) is attached vertically directly above the top of the suction fan (9), an exhaust end at the bottom of the air inlet pipe (13) is connected in communication with an intake end at the top of the suction fan (9), and a filter cover (14) is attached horizontally to the intake end at the top of the air inlet pipe (13).

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