Annular multi-stage cooling and pressure reduction device attached to steam turbine bypass system

Abstract

A circular multi-stage cooling and pressure reducing device attached to a steam turbine bypass system is provided. The system includes a pressure reducing tank 1, a water storage unit 3, and a steam pipe unit 4, of which the steam pipe unit is assembled inside the pressure reducing tank, the water storage units are mounted on both sides of the pressure reducing tank, and the motor component includes a servo motor 21, a first tapered tooth 22 is connected to the output end of the servo motor, and a second tapered tooth 23 is connected to the outside of the first tapered tooth. The annular multi-stage cooling and pressure reducing device performs annular water spraying on multiple sets of water spraying components to reduce the temperature of the position limiting mechanism, increase the atomization effect and flow rate of the water, and improve the cooling and cooling effect of the steam pipe unit, while avoiding the reduction in the working efficiency of the steam turbine caused by energy loss when the conventional cooling and pressure reducing device cannot be adjusted and there is no need to perform cooling and pressure reducing of the steam turbine bypass system.

Description

[Technical field]

[0001] The present invention relates to the technical field of steam turbine cooling and pressure reducing devices, and more particularly to an annular multi-stage cooling and pressure reducing device attached to a turbine bypass system. [Background technology]

[0002] The operating principle of a steam turbine is to convert part of the thermal energy into a high-speed airflow by mainly using the expansion of steam, and then to convert it into operating energy by rotating the impeller. A steam turbine bypass system is a steam desuperheating and pressure reduction system connected in parallel to a steam turbine, and is composed of valves, control mechanisms, piping, etc. It can guide the steam generated in the boiler to the steam piping or condenser of the lower pressure and temperature without passing through the steam turbine.

[0003] The purpose of installing a cooling and pressure reducing device in the bypass system of a steam turbine unit is to cool and pressure reduce the high-temperature, high-pressure steam from the bypass to the tolerance of the condenser and exhaust stack before discharging it into the condenser when the steam turbine starts up or the load is removed.

[0004] In the prior art, steam pressure is usually reduced by combining multiple pipes of different diameters, and the temperature of the steam inside the pipes is reduced through a water cooling device, thereby reducing the temperature and pressure of the bypass system. However, when there is no need to reduce the temperature and pressure of the bypass system of the steam turbine, the steam passes through the device again, which has the disadvantage that it will result in energy loss and reduce the normal operating efficiency of the steam turbine. Summary of the Invention [Problem to be solved by the invention]

[0005] In response to the deficiencies of the prior art, the present invention provides an annular multi-stage cooling and pressure reducing device for a steam turbine bypass system, which solves the technical problem that when there is no need to reduce the temperature and pressure of the above-mentioned steam turbine bypass system, the steam passes through the device again, which causes energy loss, thereby reducing the normal operating efficiency of the steam turbine. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides the following technical solution: an annular multi-stage cooling and pressure reducing device for a steam turbine bypass system, comprising a pressure reducing tank, a water storage unit and a steam pipe unit, in which the steam pipe unit is assembled inside the pressure reducing tank, the water storage units are mounted on both sides of the pressure reducing tank, a motor component is mounted on the top of the pressure reducing tank, the motor component comprises a servo motor, a first tapered tooth is connected to the output end of the servo motor, and a second tapered tooth is connected to the outside of the first tapered tooth.

[0007] A position limiting mechanism is uniformly arranged on the outside of the pressure reducing tank, the position limiting mechanism includes a plurality of sets of rotating disks, a driving disk is inserted into the inside of the rotating disk, a six-sided guide groove is opened on the outside of the driving disk, guide blocks are uniformly arranged inside the six-sided guide groove, a triangular plate is connected to the outside of the guide block and a round bar is connected to the other side of the triangular plate, a guide disk is connected to the outside of the round bar, a meandering guide groove is uniformly opened on the outside of the guide disk, the meandering guide groove is slidably connected to the round bar, and the rotating disk is connected to the second tapered teeth.

[0008] A fountain component is connected to the inside of the water storage unit, the fountain component includes a short pipe, an atomizing nozzle unit is connected to the outside of the short pipe, a first gear is covered on the outside of the atomizing nozzle unit, and a second gear is meshed and connected to the outside of the first gear, and the second gear is connected to a rotating disk.

[0009] Preferably, a limit ring is provided on the outside of the guide plate, and the limit ring is connected to the inside of the vacuum tank through a cross arm, so that the limit ring can support the guide plate, and the rotating plate can drive the six-sided guide groove to move the triangular plate.

[0010] Preferably, third gears are connected to both outer sides of the rotating disk, and the third gears are meshed with each other, and the third gears can transmit power between the multiple sets of position limiting mechanisms and reverse the positions of the internal components of the multiple sets of position limiting mechanisms, so that the rotation directions of the multiple sets of position limiting mechanisms can be different and the operating trajectories of the internal triangular plates can be the same.

[0011] Preferably, the steam pipe unit includes a hose, bend pipes are uniformly arranged on the outside of the hose, and flanges are connected to both ends of the hose, the outside of the hose abuts against the outside of the triangular plate, the hose inside the steam pipe unit expands due to air pressure, and the diameter of the hose can be limited by multiple sets of triangular plates, and the bend pipe can be connected to a pressure reducing tank to fix the entire position limiting mechanism.

[0012] Preferably, a lock ring is provided on the outside of the short pipe, and the lock ring is connected to a decompression tank, the short pipe is connected to a water storage unit, and the lock ring can support and fix the short pipe.

[0013] Preferably, the water storage unit includes a water storage tank, the outside of which is connected to a flange pipe, the inside of the water storage unit can store cooling water via an external water pump, and the bottom of the pressure-reducing tank is also connected to the water pump so that the water inside the pressure-reducing tank can be discharged and cooled before being used. Effect of the Invention

[0014] Compared with the prior art, the annular multi-stage cooling and pressure reducing device associated with the steam turbine bypass system of the present invention has the following advantageous effects:

[0015] In the annular multi-stage cooling and pressure reducing device attached to the turbine bypass system, when the temperature and pressure of the steam turbine bypass system are reduced, the position limiting mechanism is driven and operated by the additional motor component, thereby quickly changing the piping diameter of the steam pipe unit, accelerating the discharge of steam, and reducing the steam pressure. At the same time, when the position limiting mechanism is operating, the fountain component is driven and operated, and the rotation of the atomization nozzle unit inside the fountain component is adjusted to increase the discharge pressure of the short pipe. The multiple sets of fountain components perform annular spraying to reduce the temperature of the position limiting mechanism, increase the water atomization effect and flow rate, and improve the cooling and cooling effect of the steam pipe unit. At the same time, the reduction in the operating efficiency of the steam turbine due to energy loss can be avoided when the conventional cooling and pressure reducing device cannot be adjusted and there is no need to reduce the temperature and pressure of the steam turbine bypass system. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic front view of the present invention. [Diagram 2] FIG. 2 is a front cross-sectional view of the present invention. [Diagram 3] FIG. 3 is a schematic diagram of a localized position limiting mechanism of the present invention. [Figure 4] FIG. 4 is a local cross-sectional view of the position limiting mechanism of the present invention. [Diagram 5] FIG. 5 is a schematic front view of the fountain component of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The technical solutions of the embodiments of the present invention are described below in a clear and complete manner in conjunction with the drawings of the embodiments of the present invention. The embodiments described herein are only a part of the embodiments of the present invention, but not all of the embodiments. Any other embodiments obtained by a person skilled in the art based on the embodiments without creative labor shall be the subject of the protection of the present invention.

[0018] As shown in Figures 1 and 2, the present invention provides the following technical solution: An annular multi-stage cooling and pressure reducing device for a steam turbine bypass system includes a pressure reducing tank 1, a water storage unit 3, and a steam pipe unit 4, in which the steam pipe unit 4 is assembled inside the pressure reducing tank 1, the water storage units 3 are mounted on both sides of the pressure reducing tank 1, and a motor component 2 is mounted on the top of the pressure reducing tank 1, the motor component 2 includes a servo motor 21, a first tapered tooth 22 is connected to the output end of the servo motor 21, and a second tapered tooth 23 is connected to the outside of the first tapered tooth 22.

[0019] The pressure reducing tank 1 can reduce the temperature of the internal steam pipe unit 4, the water storage unit 3 can store water inside, and the steam pipe unit 4 can reduce the steam pressure by controlling the position limiting mechanism 5.

[0020] The servo motor 21 is connected to the pressure reducing tank 1 via a bracket, and the first taper tooth 22 transmits the position limiting mechanism 5 via the second taper tooth 23 to control the position limiting mechanism 5. The steam pipe unit 4 is bent multiple times to reduce the pressure in multiple stages with respect to temperature, and multiple sets of the fountain components 7 are installed to reduce the temperature in multiple stages.

[0021] The water storage unit 3 includes a water storage tank, and a flange pipe is connected to the outside of the water storage tank. The inside of the water storage unit 3 can store cooling water via an external water pump. The bottom of the pressure-reducing tank 1 is also connected to the water pump, allowing the water inside the pressure-reducing tank 1 to be discharged and cooled before being used.

[0022] As shown in Figures 3 and 4, the steam pipe unit 4 includes a hose, bend pipes are uniformly arranged on the outside of the hose, and flanges are connected to both ends of the hose, and the outside of the hose abuts against the outside of the triangular plate 55. The hose inside the steam pipe unit 4 expands due to air pressure, and the diameter of the hose can be limited by multiple sets of triangular plates 55. The bend pipes can be connected to the pressure reducing tank 1 to fix the entire position limiting mechanism 5.

[0023] The position limiting mechanism 5 is uniformly arranged on the outside of the decompression tank 1, and the position limiting mechanism 5 includes a plurality of sets of rotating disks 51, a driving disk 57 is inserted into the inside of the rotating disk 51, a six-sided guide groove 58 is opened on the outside of the driving disk 57, guide blocks 56 are uniformly arranged inside the six-sided guide groove 58, a triangular plate 55 is connected to the outside of the guide block 56, and a round bar 54 is connected to the other side of the triangular plate 55, a guide disk 52 is connected to the outside of the round bar 54, a meandering guide groove 53 is uniformly opened on the outside of the guide disk 52, the meandering guide groove 53 is slidably connected to the round bar 54, and the rotating disk 51 is connected to the second tapered teeth 23.

[0024] The rotating disk 51 can rotate the driving disk 57 through the second tapered tooth 23, and drive the triangular plate 55 through the six-sided guide groove 58 to move its interior, so as to change the size between the interior and control the diameter of the steam pipe unit 4, where the thickness of the triangular plate 55 can be changed according to the length of the steam pipe unit 4, and each set of position limiting mechanism 5 has at least two sets of rotating disks 51 and driving disks 57, of which two rotating disks 51 are connected to each other.

[0025] As shown in FIG. 5 , a limit ring 6 is installed on the outside of the guide plate 52, and the limit ring 6 is connected to the inside of the decompression tank 1 through a cross arm, and the limit ring 6 can support the guide plate 52, so that the rotating plate 51 can drive the six-sided guide groove 58 to move the triangular plate 55. A third gear 8 is connected to both sides of the outside of the rotating plate 51, and the third gears 8 are meshed and connected between each other. The third gear 8 can transmit the power between the multiple sets of position limiting mechanisms 5, and can reverse the positions of the internal components of the multiple sets of position limiting mechanisms 5, so that the rotation directions of the multiple sets of position limiting mechanisms 5 can be different and the movement trajectories of the internal triangular plate 55 can be the same.

[0026] A fountain component 7 is connected to the inside of the water storage unit 3, and the fountain component 7 includes a short pipe 71, an atomizing nozzle unit 72 is connected to the outside of the short pipe 71, a first gear 73 is covered on the outside of the atomizing nozzle unit 72, and a second gear 74 is connected in mesh with the outside of the first gear 73, and the second gear 74 is connected to the rotating disk 51.

[0027] A lock ring 75 is installed on the outside of the short pipe 71, and the lock ring 75 is connected to the reduced pressure tank 1. The short pipe 71 communicates with the water storage unit 3, and the lock ring 75 can support and fix the short pipe 71.

[0028] The short pipe 71 is used to extract the water inside the water storage unit 3, and the atomizing nozzle unit 72 is a typical adjustable atomizing nozzle in the prior art, which can control the amount of water discharged inside by turning the external piping.

[0029] In this technical solution, firstly, both ends of the steam pipe unit 4 are connected to the steam turbine bypass system, and when it is necessary to reduce the temperature and pressure inside the steam turbine bypass system, the external circulating cooling water pump is connected to the water storage unit 3, and water is sprayed through the fountain unit 7 to spray the outside of the steam pipe unit 4 to reduce the temperature of the steam inside the steam pipe unit 4, and at the same time, the servo motor 21 is started to drive the first taper tooth 22 to operate the second taper tooth 23, and then the rotating disk 51 is driven to rotate the driving disk 57, and the guide block 56 moves inside the six-sided guide groove 58, thereby driving the sets of triangular plates 55, and the round bar 54 is used to move inside the meandering guide groove 53, changing the distance between the sets of triangular plates 55, and releasing the restriction on the steam pipe unit 4. At this time, the steam pipe unit 4 is driven by the steam pressure to expand, expanding the flow diameter of the steam pipe unit 4, and further realizing the reduction of the steam pressure. At the same time, the turntable 51 rotates to drive the second gear 74 to rotate, thereby driving the first gear 73 to rotate, and further adjusts the water sprayed from the atomization nozzle unit 72, and reduces the temperature of the steam piping unit 4 through the atomization of the water, thereby improving the temperature reduction effect of the steam pipe unit 4.

[0030] When it is necessary to reduce the temperature and pressure of the steam turbine bypass system, the position limiting mechanism 5 is driven and operated by the additional motor component 2, thereby quickly changing the piping diameter of the steam pipe unit 4, accelerating the discharge of steam and reducing the steam pressure; at the same time, even when the position limiting mechanism 5 is operating, the fountain component 7 is driven and operated, and the rotation of the atomizing nozzle unit 72 inside the fountain component 7 is adjusted to increase the discharge pressure of the short pipe 71, increasing the water atomization effect and flow rate, thereby improving the cooling and cooling effect of the steam pipe unit 4; and at the same time, the reduction in the operating efficiency of the steam turbine due to energy loss when the conventional cooling and pressure reducing device cannot be adjusted and there is no need to perform cooling and pressure reducing of the steam turbine bypass system is avoided.

[0031] It should be explained that in this specification, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that such an actual relationship or order exists between those entities or operations. Also, the terms "comprise", "comprise", or any other variation thereof are intended to cover the non-exclusive inclusion of a process, method, article, or apparatus that includes a set of elements, including not only those elements, but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0032] Although the embodiments of the present invention have been shown and described above, those skilled in the art may make various changes, modifications, substitutions or variations to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is limited by the appended claims and their equivalents. [Explanation of symbols]

[0033] 1: pressure reducing tank, 2: motor component, 21: servo motor, 22: first taper tooth, 23: second taper tooth, 3: water storage unit, 4: steam pipe unit, 5: position limiting mechanism, 51: rotating plate, 52: guide plate, 53: curved guide groove, 54: round bar, 55: triangular plate, 56: guide block, 57: drive plate, 58: six-sided guide groove, 6: limit ring, 7: fountain component, 71: short pipe, 72: atomizing nozzle unit, 73: first gear, 74: second gear, 75: lock ring, 8: third gear

Claims

1. A circular multi-stage cooling and pressure reducing device attached to a steam turbine bypass system, comprising: The system includes a pressure reducing tank (1), a water storage unit (3) and a steam pipe unit (4), Among them, the steam pipe unit (4) is installed inside the decompression tank (1), The water storage units (3) are attached to both sides of the decompression tank (1), A motor component (2) is attached to the upper part of the pressure reducing tank (1), The motor component (2) includes a servo motor (21); A first tapered tooth (22) is connected to the output end of the servo motor (21); A second tapered tooth (23) is connected to the outside of the first tapered tooth (22), A position limiting mechanism (5) is uniformly arranged on the outside of the decompression tank (1); The position limiting mechanism (5) includes a plurality of sets of rotating disks (51), A drive platen (57) is inserted into the rotating platen (51), A six-sided guide groove (58) is provided on the outside of the drive board (57). The guide blocks (56) are uniformly arranged inside the six-sided guide grooves (58), A triangular plate (55) is connected to the outside of the guide block (56), and A round bar (54) is connected to the other side of the triangular plate (55), A guide plate (52) is connected to the outside of the round bar (54), The guide plate (52) has a meandering guide groove (53) evenly formed on the outside thereof. The meandering guide groove (53) is slidably connected to a round bar (54), The rotating disk (51) is connected to the second tapered teeth (23), A fountain component (7) is connected to the inside of the water storage unit (3), The fountain component (7) comprises a short pipe (71); An atomizing nozzle unit (72) is connected to the outside of the short pipe (71), A first gear (73) is provided on the outside of the atomizing nozzle unit (72), and A second gear (74) is connected to the outside of the first gear (73) in meshing engagement therewith.

2. The steam turbine bypass system according to claim 1, wherein the second gear (74) is connected to a rotating disk (51).

2. A limit ring (6) is provided on the outside of the guide plate (52), and The limit ring (6) is connected to the inside of the vacuum tank (1) via a transverse arm.

2. The annular multi-stage cooling and pressure reducing apparatus attached to a steam turbine bypass system according to claim 1.

3. A third gear (8) is connected to both sides of the outside of the rotating disk (51), The third gears (8) are meshed and connected.

2. The annular multi-stage cooling and pressure reducing apparatus attached to a steam turbine bypass system according to claim 1.

4. The steam pipe unit (4) includes a hose, The bends are uniformly arranged on the outside of the hose, and Flanges are connected to both ends of the hose. The exterior of the hose abuts against the exterior of the triangular plate (55); 2. The annular multi-stage cooling and pressure reducing apparatus attached to a steam turbine bypass system according to claim 1.

5. A lock ring (75) is provided on the outside of the short pipe (71), and The lock ring (75) is connected to the vacuum tank (1), The short pipe (71) communicates with the water storage unit (3).

2. The annular multi-stage cooling and pressure reducing apparatus attached to a steam turbine bypass system according to claim 1.

6. The water storage unit (3) includes a water storage tank, A flange pipe is connected to the outside of the water tank.

2. The annular multi-stage cooling and pressure reducing apparatus attached to a steam turbine bypass system according to claim 1.

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