Detachable steam turbine temperature reduction mechanism and steam turbine exhaust temperature reduction device

Abstract

The detachable steam turbine temperature reduction mechanism comprises a cooling water pipeline, one end of the cooling water pipeline is sealed, and the other end of the cooling water pipeline penetrates into an inner cavity of an exhaust connecting pipe from the side wall of the exhaust connecting pipe and is fixed to the inner wall of the opposite side of the exhaust connecting pipe; at least one atomizing nozzle is arranged on the cooling water pipeline in the inner cavity section of the exhaust connecting pipe; the cooling water pipeline is coaxially sleeved with a stabilizing assembly on the outer side section of the exhaust connecting pipe and is fixedly connected with the side wall of the exhaust connecting pipe through the stabilizing assembly. Through reasonable arrangement of component structures, cooling water is supplied into the cooling water pipeline, the cooling water is atomized and sprayed into the inner cavity of the exhaust connecting pipe through the atomizing nozzle, and supercooling heat exchange is carried out, so that the steam temperature at the exhaust hood of the steam turbine can be reduced, and the temperature of the exhaust hood of the steam turbine is further reduced; the problem of deformation of the steam exhaust cylinder of the steam turbine caused by overhigh steam exhaust temperature is solved, so that the speed increasing process of the steam turbine is smoothly carried out; the whole structure is easy to implement, and improvement on the basis of existing equipment is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbines, and in particular relates to a detachable steam turbine temperature reduction mechanism and a steam turbine exhaust temperature reduction device. Background Art

[0002] During the process of starting and increasing the speed of the steam turbine, the steam inlet flow rate of the turbine is small, which is not enough to take away the heat generated by the friction between the steam and the impeller, and a blowing effect is formed at the exhaust of the turbine. As a result, the exhaust temperature of the turbine increases, and the temperature of the exhaust cylinder is also high. Excessive exhaust temperature will cause deformation of the exhaust cylinder of the turbine, destroy the consistency of the center line of the moving and static parts of the turbine, and cause excessive vibration at the turbine bearings during the speed-up process, triggering the turbine interlock trip. The turbine cannot complete the speed-up process, resulting in the turbine being unable to be put into use, affecting the user's entire device. Summary of the invention

[0003] In view of the above problems, the purpose of the utility model is to provide a detachable steam turbine cooling mechanism and a steam turbine exhaust cooling device to solve the problem of turbine tripping caused by excessively high exhaust temperature of the existing steam turbine.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes:

[0005] A detachable steam turbine cooling mechanism comprises a cooling water pipe, one end of which is sealed, and the other end of which penetrates from the side wall of the exhaust pipe into the inner cavity of the exhaust pipe and is fixed on the inner wall on the opposite side; at least one atomizing nozzle is provided in the inner cavity section of the exhaust pipe; a stabilizing component is coaxially sleeved on the outer section of the exhaust pipe, and the cooling water pipe is fixed to the side wall of the exhaust pipe through the stabilizing component.

[0006] Preferably, the stabilizing component includes a limit ring coaxially sleeved on the cooling water pipe, one end of the limit ring is connected to the outer wall of the exhaust pipe, and the other end of the limit ring is provided with a connecting convex ring on the outer periphery, and the inner diameter of the limit ring is larger than the outer diameter of the cooling water pipe; the stabilizing component also includes a fixing ring coaxially sleeved on the cooling water pipe, the inner periphery of the fixing ring is clearance-matched with the outer periphery of the cooling water pipe, and the fixing ring is contact-connected and fixed with the connecting convex ring.

[0007] Preferably, at least two connecting shafts are included to connect the fixing ring and the connecting convex ring.

[0008] Preferably, a limiting support platform is provided at the lower part of the contact point between the inner wall of the exhaust pipe and one end of the cooling water pipe.

[0009] Preferably, the cooling water pipeline is located in the inner cavity section of the exhaust pipe and is provided with two atomizing nozzles which are arranged at equal intervals between the inner walls adjacent to the exhaust pipe.

[0010] A steam turbine exhaust gas temperature reduction device includes an exhaust connection pipe connected to the steam turbine, and also includes a main cooling water pipe. A filter and a regulating valve are sequentially provided on the main cooling water pipe; it also includes at least one temperature reduction mechanism, and the temperature reduction mechanism is a detachable steam turbine temperature reduction mechanism disclosed in this application. The other end of the cooling water pipe is communicated with the water outlet end of the main cooling water pipe.

[0011] Preferably, it also includes a temperature monitoring mechanism provided on the side wall of the exhaust connection pipe.

[0012] Compared with the prior art, the advantages of the present utility model are as follows:

[0013] (1) A detachable steam turbine temperature reduction mechanism of the present utility model, through reasonable setting of the component structure, supplies cooling water into the cooling water pipe, and sprays the cooling water atomized through an atomizing nozzle into the inner cavity of the exhaust connection pipe. Through heat exchange, the steam temperature at the steam turbine exhaust cylinder can be reduced, and then the temperature of the steam turbine exhaust cylinder can be reduced, solving the deformation of the steam turbine exhaust cylinder caused by too high exhaust steam temperature, and enabling the smooth progress of the steam turbine speed-up process; the overall structure is easy to implement and convenient for transformation on the basis of existing equipment.

[0014] (2) A detachable steam turbine temperature reduction mechanism of the present utility model, through reasonable setting of the component structure and the structure setting of the stabilizing component, is convenient for detachable installation and fixation of the cooling water pipe.

[0015] (3) A steam turbine exhaust gas temperature reduction device of the present utility model, through reasonable setting of the component structure, the main cooling water pipe is externally connected to cooling water to supply each cooling water pipe, and the impurities in the cooling water are filtered through the filter on the main cooling water pipe, and the opening, closing and flow rate of the cooling water are adjusted through the regulating valve; when the steam exhaust temperature of the steam turbine rises above the set value, the regulating valve is opened, and the cooling water is atomized and sprayed into the inner cavity of the exhaust connection pipe through the atomizing nozzle to reduce the steam temperature at the steam turbine exhaust cylinder. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the steam turbine exhaust gas temperature reduction device of the present utility model;

[0018] Figure 2 is Figure 1 the top view of

[0019] Each label in the figure represents:

[0020] 1 Cooling water pipe, 2 atomizing nozzle, 3 stabilizing component; 3-1 limiting ring, 3-10 connecting convex ring, 3-2 fixing ring, 3-3 connecting shaft, 4 limiting support platform;

[0021] A Exhaust connection pipe, B Main cooling water pipe, C Desuperheating mechanism, D Temperature monitoring mechanism. Specific implementation mode

[0022] The utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solution of this application fall within the protection scope of the utility model.

[0023] It should be noted that the directional terms mentioned in this article, such as "inner cavity", "inner circumference", "inner wall" and "outer side", etc., are all consistent with the specific direction on the paper of the specification drawings or the corresponding direction in the space shown in the drawings; all components and equipment in the present utility model, unless otherwise specified, all adopt the components and equipment known in the prior art.

[0024] Embodiment 1

[0025] A detachable steam turbine desuperheating mechanism includes a cooling water pipe 1. One end of the cooling water pipe 1 is sealed, and one end of the cooling water pipe 1 penetrates into the inner cavity of the exhaust connection pipe A from the side wall of the exhaust connection pipe A and is fixed on the inner wall of the opposite side; at least one atomizing nozzle 2 is provided on the section of the cooling water pipe 1 located in the inner cavity of the exhaust connection pipe A; a stabilizing component 3 is coaxially sleeved on the section of the cooling water pipe 1 located outside the exhaust connection pipe A, and the cooling water pipe 1 is fixedly connected to the side wall of the exhaust connection pipe A through the stabilizing component 3;

[0026] Its function is: by inserting the cooling water pipe 1 into the exhaust connection pipe A and fixing it through the stabilizing component 3, when the exhaust steam temperature of the steam turbine rises above the set value, cooling water is supplied into the cooling water pipe 1, and the cooling water is atomized and sprayed in the inner cavity of the exhaust connection pipe A through the atomizing nozzle 2. Through heat exchange, the steam temperature at the exhaust cylinder of the steam turbine can be reduced, and then the temperature of the exhaust cylinder of the steam turbine can be reduced, solving the deformation of the exhaust cylinder of the steam turbine caused by too high exhaust steam temperature, and enabling the steam turbine to accelerate smoothly; the overall structure is easy to implement and convenient to transform on the basis of existing equipment.

[0027] In this embodiment, 2 atomizing nozzles 2 are arranged at equal intervals between the adjacent inner walls of the exhaust connection pipe A on the section of the cooling water pipe 1 located in the inner cavity of the exhaust connection pipe A.

[0028] Specifically, the stabilizing component 3 includes a limiting ring 3-1 coaxially sleeved on the cooling water pipe 1. One end of the limiting ring 3-1 is fixedly connected to the outer wall of the exhaust connection pipe A. On the outer periphery of the other end of the limiting ring 3-1, there is a connecting convex ring 3-10. The inner diameter of the limiting ring 3-1 is larger than the outer diameter of the cooling water pipe 1. The stabilizing component 3 further includes a fixing ring 3-2 coaxially sleeved on the cooling water pipe 1. The inner circumference of the fixing ring 3-2 is in clearance fit with the outer circumference of the cooling water pipe 1, and the fixing ring 3-2 is in contact and fixedly connected with the connecting convex ring 3-10. It also includes at least two connecting shafts 3-3 for fixedly connecting the fixing ring 3-2 and the connecting convex ring 3-10.

[0029] Its function is as follows: When in use, an opening for the cooling water pipe 1 to penetrate is provided on the side of the exhaust connection pipe A. One end of the limiting ring 3-1 is fixed to the outer wall of the cooling water pipe 1 and is coaxial with the opening through which the cooling water pipe 1 penetrates. After one end of the cooling water pipe 1 penetrates into the inner cavity of the exhaust connection pipe A and is fixed to the inner wall on the opposite side, the fixing ring 3-2 and the connecting convex ring 3-10 are coaxially contacted and fixedly connected through the connecting shaft 3-3. The connecting shaft 3-3 can be selected as a bolt. The overall structure is easy to implement and convenient for detachable installation and fixation of the cooling water pipe 1.

[0030] In this embodiment, a limiting support platform 4 is provided below the contact point between the inner wall of the exhaust connection pipe A and one end of the cooling water pipe 1 to facilitate the penetration of one end of the cooling water pipe 1 into the inner cavity of the exhaust connection pipe A and support and fix it to the inner wall on the opposite side.

[0031] Embodiment 2

[0032] A steam turbine exhaust gas temperature reduction device includes an exhaust connection pipe A connected to the steam turbine, and also includes a cooling water main pipe B. A filter and a regulating valve are sequentially provided on the cooling water main pipe B. It also includes at least one temperature reduction mechanism C. The temperature reduction mechanism C is the detachable steam turbine temperature reduction mechanism of Embodiment 1. The other end of the cooling water pipe 1 is communicated with the water outlet end of the cooling water main pipe B.

[0033] Its function is as follows: The cooling water main pipe B is externally connected to cooling water to supply it to each cooling water pipe 1, and filters impurities in the cooling water through the filter on the cooling water main pipe B, and regulates the opening, closing and flow rate of the cooling water through the regulating valve. When the exhaust gas temperature of the steam turbine rises above the set value, the regulating valve is opened, and the cooling water is atomized and sprayed into the inner cavity of the exhaust connection pipe A through the atomizing nozzle 2. Through heat and mass exchange, the steam temperature at the steam turbine exhaust cylinder can be reduced, and then the temperature of the steam turbine exhaust cylinder can be reduced, solving the deformation of the steam turbine exhaust cylinder caused by too high exhaust gas temperature and enabling the smooth acceleration process of the steam turbine.

[0034] This embodiment discloses including two parallel temperature reduction mechanisms C.

[0035] The embodiment disclosed herein also includes a temperature monitoring mechanism D disposed on the side wall of the exhaust pipe A. The temperature monitoring mechanism D is used to monitor the exhaust temperature of the steam turbine in real time. When the temperature monitoring mechanism D detects that the exhaust temperature of the steam turbine has risen above a set value, it sends a signal / instruction to open the regulating valve; when the temperature monitoring mechanism D detects that the exhaust temperature of the steam turbine has dropped to a set value, it sends a signal / instruction to close the regulating valve.

[0036] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0038] In addition, the various different implementation modes disclosed in this solution may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the content invented by the present disclosure.

Claims

1. A detachable steam turbine cooling mechanism, characterized in that: It comprises a cooling water pipe (1), one end of the cooling water pipe (1) is sealed, and one end of the cooling water pipe (1) penetrates into the inner cavity of the exhaust pipe (A) from the side wall of the exhaust pipe (A) and is fixed to the inner wall on the opposite side thereof; The cooling water pipeline (1) is provided with at least one atomizing nozzle (2) in the inner cavity section of the exhaust pipe (A); The cooling water pipeline (1) is coaxially sleeved with a stabilizing component (3) located at the outer section of the exhaust pipe (A), and the cooling water pipeline (1) is fixedly connected to the side wall of the exhaust pipe (A) via the stabilizing component (3).

2. The detachable steam turbine cooling mechanism according to claim 1, characterized in that: The stabilizing component (3) comprises a limiting ring (3-1) coaxially sleeved on the cooling water pipe (1), one end of the limiting ring (3-1) is fixedly connected to the outer wall of the exhaust pipe (A), and the other end of the limiting ring (3-1) is provided with a connecting convex ring (3-10) on the outer periphery, and the inner diameter of the limiting ring (3-1) is larger than the outer diameter of the cooling water pipe (1); The stabilizing component (3) also includes a fixing ring (3-2) coaxially sleeved on the cooling water pipeline (1), the inner periphery of the fixing ring (3-2) and the outer periphery of the cooling water pipeline (1) being clearance-matched, and the fixing ring (3-2) and the connecting convex ring (3-10) being contact-connected and fixed.

3. The detachable steam turbine cooling mechanism according to claim 2, characterized in that: It also comprises at least two connecting shafts (3-3) for connecting the fixing ring (3-2) and the connecting convex ring (3-10).

4. The detachable steam turbine cooling mechanism according to any one of claims 1 to 3, characterized in that: A limiting support platform (4) is provided below the contact point between the inner wall of the exhaust pipe (A) and one end of the cooling water pipe (1).

5. The detachable steam turbine cooling mechanism according to claim 4, characterized in that: The cooling water pipeline (1) is located in the inner cavity section of the exhaust pipe (A) and is provided with two atomizing nozzles (2) arranged at equal intervals between the inner walls adjacent to the exhaust pipe (A).

6. A steam turbine exhaust temperature reduction device, comprising an exhaust pipe (A) connected to the steam turbine, characterized in that: It also includes a cooling water main (B), on which a filter and a regulating valve are arranged in sequence; It also includes at least one cooling mechanism (C), which is a detachable steam turbine cooling mechanism as described in any one of claims 1 to 5, and the other end of the cooling water pipeline (1) is connected to the outlet end of the cooling water main pipe (B).

7. The steam turbine exhaust gas temperature reduction device according to claim 6, characterized in that: It also includes a temperature monitoring mechanism (D) arranged on the side wall of the exhaust pipe (A).

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